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CN112195654A - Composite non-woven fabric for PU synthetic leather and preparation method thereof - Google Patents

Composite non-woven fabric for PU synthetic leather and preparation method thereof Download PDF

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Publication number
CN112195654A
CN112195654A CN202010944910.0A CN202010944910A CN112195654A CN 112195654 A CN112195654 A CN 112195654A CN 202010944910 A CN202010944910 A CN 202010944910A CN 112195654 A CN112195654 A CN 112195654A
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CN
China
Prior art keywords
woven fabric
synthetic leather
fabric
antibacterial
cloth
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202010944910.0A
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Chinese (zh)
Other versions
CN112195654B (en
Inventor
胡忠杰
葛庆
张丽君
吴城锋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jiangsu Huafeng Microfiber Material Co ltd
Original Assignee
Jiangsu Huafeng Microfiber Material Co ltd
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Priority to CN202010944910.0A priority Critical patent/CN112195654B/en
Publication of CN112195654A publication Critical patent/CN112195654A/en
Application granted granted Critical
Publication of CN112195654B publication Critical patent/CN112195654B/en
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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
    • D06N3/0013—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using multilayer webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions
    • B32B3/08—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by added members at particular parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/30—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer formed with recesses or projections, e.g. hollows, grooves, protuberances, ribs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/022—Non-woven fabric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/06—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer characterised by a fibrous or filamentary layer mechanically connected, e.g. by needling to another layer, e.g. of fibres, of paper
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
    • D06N3/0004—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using ultra-fine two-component fibres, e.g. island/sea, or ultra-fine one component fibres (< 1 denier)
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
    • D06N3/0015—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using fibres of specified chemical or physical nature, e.g. natural silk
    • D06N3/0025—Rubber threads; Elastomeric fibres; Stretchable, bulked or crimped fibres; Retractable, crimpable fibres; Shrinking or stretching of fibres during manufacture; Obliquely threaded fabrics
    • D06N3/0027—Rubber or elastomeric fibres
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
    • D06N3/0015—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using fibres of specified chemical or physical nature, e.g. natural silk
    • D06N3/0034—Polyamide fibres
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0056—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the compounding ingredients of the macro-molecular coating
    • D06N3/0063—Inorganic compounding ingredients, e.g. metals, carbon fibres, Na2CO3, metal layers; Post-treatment with inorganic compounds
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/12—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
    • D06N3/14—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/12—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
    • D06N3/14—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes
    • D06N3/142—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes mixture of polyurethanes with other resins in the same layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/02—Composition of the impregnated, bonded or embedded layer
    • B32B2260/021—Fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0292—Polyurethane fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
    • B32B2307/21—Anti-static
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
    • B32B2307/7145—Rot proof, resistant to bacteria, mildew, mould, fungi
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N2201/00—Chemical constitution of the fibres, threads or yarns
    • D06N2201/10—Conjugate fibres, e.g. core-sheath, side-by-side
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N2209/00—Properties of the materials
    • D06N2209/16—Properties of the materials having other properties
    • D06N2209/1671—Resistance to bacteria, mildew, mould, fungi
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N2211/00—Specially adapted uses
    • D06N2211/12—Decorative or sun protection articles
    • D06N2211/28—Artificial leather
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
    • Y02P70/62—Manufacturing or production processes characterised by the final manufactured product related technologies for production or treatment of textile or flexible materials or products thereof, including footwear

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)
  • Synthetic Leather, Interior Materials Or Flexible Sheet Materials (AREA)

Abstract

The invention relates to a composite non-woven fabric for PU synthetic leather and a preparation method thereof, wherein the method comprises the following steps: (1) using pulsed laser beamsEtching the interlayer cloth to obtain the interlayer cloth with a micro-groove structure on the surface; (2) dipping the sandwich cloth with the surface provided with the micro-groove structure into finishing liquid containing the antibacterial antistatic agent, and drying to obtain the sandwich cloth containing the antibacterial antistatic agent; (3) the antibacterial antistatic agent sandwich cloth and the non-woven cloth formed by the sea-island fibers are compounded by adopting a needle punching method to prepare the composite non-woven cloth. The PU synthetic leather prepared by dipping the composite non-woven fabric in the polyurethane slurry has the bacteriostasis rate of 90.0-99.9 percent on staphylococcus aureus, the bacteriostasis rate of 90.0-99.9 percent on klebsiella pneumoniae and the surface resistance of 1 multiplied by 103～1×106Ohm, the method of the invention is simple and easy to implement, and the synthetic leather prepared has good and lasting antibacterial and antistatic functions.

Description

Composite non-woven fabric for PU synthetic leather and preparation method thereof
Technical Field
The invention belongs to the technical field of synthetic leather, and relates to a composite non-woven fabric for PU synthetic leather and a preparation method thereof.
Background
In the prior art, in order to obtain antibacterial and antistatic effects, the method is generally divided into two modes, namely a melt spinning method is adopted, and functional additives (such as an antibacterial agent and an antistatic modifier) are added into the melt spinning method to obtain fibers with antibacterial and antistatic effects; and the other method is that after the fiber is made into fabric, the fabric is subjected to post-treatment to endow the fabric with certain antibacterial and antistatic effects. In addition, there are also techniques using a combination of melt spinning modification and post-treatment.
The antibacterial and antistatic effects of the fabric are often poor in durability through a post-treatment technology, and at present, the research direction mainly focuses on the dispersion and distribution of the functional additives in the functional treatment liquid and the binding force between the functional additives and the fabric; the method can obtain the antibacterial and antistatic fiber with good durability by a melt spinning modification method, but the method has high requirements on the selection of the functional auxiliary agent and the selection of the process, the addition amount of the functional auxiliary agent is limited by the spinnability, and the problem of difficult spinning forming and the like is often caused when the addition amount is too much. For example, in the prior art, a conductive/antistatic auxiliary agent of carbon element types such as carbon black/carbon fiber/carbon nanotube is used as an antistatic modifying agent of fiber and is dispersed into a spinning-grade nylon 6 slice, when the addition amount of the antistatic modifying agent reaches a certain concentration during melt spinning, the antistatic effect is good, but the spinnability is poor, a spinneret plate is easy to block, and defective products such as broken filaments, hard filaments and large-end filaments occur, so that the product quality is influenced; when the amount of the antistatic modifier added during melt spinning is small, the spinnability is not deteriorated, but the antistatic effect is not satisfactory.
The prior art also discloses an antibiotic type spunbonded nonwoven, including the non-woven fabrics top layer, the non-woven fabrics intermediate layer, the non-woven fabrics bottom and the antibiotic granule that is located the non-woven fabrics intermediate layer clearance, the diameter of this antibiotic granule is less than the fibre clearance in the non-woven fabrics intermediate layer, be greater than the fibre clearance on non-woven fabrics top layer and non-woven fabrics bottom, this kind is through multilayer non-woven fabrics technique, and utilize the clearance difference of fabric to lock antibiotic granule inside the non-woven fabrics, all have certain advantage in processing method and antibiotic effect's persistence. The method has higher requirements on the control of fiber gaps of the multi-layer non-woven fabric, the particle size selectivity of antibacterial particles is also limited, and the structure is not suitable for the preparation of PU synthetic leather because the fiber gaps of the non-woven fabric made of sea-island fibers can be widened in the fiber opening process of the PU synthetic leather; when the non-woven fabric made of the sea-island fiber is used as an interlayer, in order to effectively lock the antibacterial particles, the non-woven fabric with fine fiber is required to be used as a surface layer and a non-woven fabric bottom layer, and when the sea-island fiber is opened, the opening process is difficult because the sea-island fiber is wrapped by the non-woven fabric with fine fiber on the surface layer and the bottom layer; if the non-woven fabric made of the sea-island fiber is used as a surface layer or a bottom layer, the gaps of the fiber are widened after the fiber is opened, and the antibacterial particles are easy to remove in the opening process.
Therefore, the development of the composite non-woven fabric for PU synthetic leather with excellent spinnability and durable antibacterial and antistatic properties and the preparation method thereof have very important significance.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a composite non-woven fabric for PU synthetic leather and a preparation method thereof.
One of the purposes of the invention is to provide a composite non-woven fabric for PU synthetic leather, which comprises a non-woven fabric formed by sea-island fibers, a sandwich fabric and an antibacterial antistatic agent fixed in a microgroove of the sandwich fabric; the sandwich cloth contains elastic fiber; the non-woven fabric is firmly connected with the interlayer fabric; the composite non-woven fabric is prepared into PU synthetic leather, the bacteriostasis rate of the PU synthetic leather to staphylococcus aureus is 90.0-99.9%, and the bacteriostasis rate to klebsiella pneumoniae is high90.0 to 99.9 percent and the surface resistance of 1 multiplied by 103～1×106Ohm, the PU synthetic leather is washed by water for 20 times according to the method of AATCC 135 plus 2018, the bacteriostasis rate to staphylococcus aureus is 90.0-95 percent, the bacteriostasis rate to Klebsiella pneumoniae is 90.0-95 percent, and the surface resistance is 1 multiplied by 103～1×106Ohm, and the tearing strength of the PU synthetic leather is 100-130N.
The invention also aims to provide a preparation method of the composite non-woven fabric for the PU synthetic leather, which comprises the steps of firstly forming micro-grooves on the surface of the interlayer fabric so that an antibacterial antistatic agent can be fixed on the interlayer fabric, and thus the antibacterial antistatic property of the interlayer fabric is durable; secondly, compounding the sandwich cloth containing the antibacterial and antistatic agent and the non-woven fabric formed by the sea-island fibers together by using a needle punching method to form a structure in which the fibers are mutually entangled, so that the non-woven fabric formed by the sea-island fibers is not damaged in the fiber opening process of the synthetic leather, and the composite strength of the composite non-woven fabric is ensured; in addition, the invention also adopts a mode of adding spandex in the sandwich cloth to increase the composite strength of the sandwich cloth containing the antibacterial and antistatic agent and the non-woven cloth formed by the sea-island fibers, so as to further improve the comprehensive performances of the composite non-woven cloth and the PU synthetic leather made of the composite non-woven cloth, such as mechanical property, antibacterial property, antistatic property and the like.
In order to achieve the purpose, the invention adopts the following scheme:
a composite non-woven fabric for PU synthetic leather comprises a non-woven fabric, an interlayer fabric and an antibacterial antistatic agent fixed in a microgroove of the interlayer fabric; the sandwich cloth contains elastic fiber; the non-woven fabric is firmly connected with the interlayer fabric; the microgrooves are positioned on one side of the sandwich fabric facing the non-woven fabric; the non-woven fabric is composed of sea-island fibers; the sandwich cloth contains elastic fiber.
As a preferred technical scheme:
the composite non-woven fabric for the PU synthetic leather is soaked in the polyurethane slurry, and is subjected to solidification, water washing, fiber opening, splitting, grinding, dyeing and water washing and drying to prepare the PU synthetic leather;
the antibacterial rate of PU synthetic leather made of composite non-woven fabric to staphylococcus aureus is 90.0% ~ up99.9 percent, 90.0 to 99.9 percent of bacteriostasis rate to Klebsiella pneumoniae and 1 multiplied by 10 of surface resistance3～1×106Ohm;
the PU synthetic leather prepared from the composite non-woven fabric is washed for 20 times by the AATCC 135-plus 2018 method, and the bacteriostasis rate to staphylococcus aureus is 90.0-95.0%, the bacteriostasis rate to klebsiella pneumoniae is 90.0-95.0%, and the surface resistance is 1 multiplied by 103～1×106Ohm;
the tearing strength of PU synthetic leather (before washing) prepared from the composite non-woven fabric is 100-130N.
In the composite non-woven fabric for PU synthetic leather, the elastic fiber is spandex.
In the composite nonwoven fabric for PU synthetic leather, in the sea-island fiber, the sea component is made of LDPE (low density polyethylene PE) (a melt-spinnable polymer removable by a solvent), and the island component is made of nylon PA or polyester PET (a melt-spinnable polymer and not removable by a solvent dissolving the sea component); the volume ratio of the island component to the sea component is 70-80: 30-20; the number of the fixed islands in the sea-island fiber is 16-64; preferably 37 to 64;
when the volume ratio of the island component to the sea component is less than 70:30, the firm connection strength between the non-woven fabric and the interlayer fabric is not enough, and when the volume ratio of the island component to the sea component is more than 80:20, islands are easy to combine, and the spinning is difficult; the number of the fixed islands is less than 16, which causes insufficient connection strength between the subsequent non-woven fabric and the interlayer fabric, especially affects the composite strength of the composite fabric, preferably, the number of the fiber islands is more than 37, the composite strength is optimal, and the excessive number of the islands causes the fiber to be too fine, thus causing poor dyeability.
In the needling process, the elastic fiber is favorable for firm connection of the non-woven fabric and the sandwich fabric, so that the prepared composite non-woven fabric still has tight adhesive force with the sandwich fabric after fiber splitting treatment, and the sandwich fabric is not easy to be damaged by impact force generated by a high-strength needle machine due to the spandex.
The composite non-woven fabric for the PU synthetic leather has the advantages that the content of spandex in the interlayer fabric is 5-15 wt%; the other components are made of the same material as the island components; the firm connection is realized by a needle punching method. When the content of spandex in the sandwich cloth is less than 5 wt%, the firm connection between the lifting non-woven cloth and the sandwich cloth is not large; when the content of spandex in the interlayer fabric is more than 15 wt%, the firm connection between the non-woven fabric and the interlayer fabric is not facilitated due to overlarge elasticity.
The sandwich cloth is woven cloth; the width of the micro-groove is 200-500 μm, and the depth is 200-500 μm. The woven fabric is of a regular fabric structure, and the structure enables the non-woven fabric and the sandwich fabric to only generate a regular cross relation in the longitudinal direction (the needling direction) when the non-woven fabric is prepared in the needling process, so that the influence of the sandwich fabric on sea-island fibers in the non-woven fabric in the subsequent fiber opening process is reduced to the maximum extent.
The microgrooves are beneficial to the attachment of the silver-based antibacterial and antistatic auxiliary agent, the width of each microgroove is less than 200 mu m, the depth of each microgroove is less than 200 mu m, the attachment amount of the silver-based antibacterial and antistatic auxiliary agent is insufficient, the antistatic property and the antibacterial property cannot meet the requirements, the width of each microgroove is more than 500 mu m, the depth of each microgroove is more than 500 mu m, the fiber strength is reduced seriously, and the sandwich cloth is easy to be punctured when the non-woven fabric is needled.
The median particle diameter D50 of the antibacterial antistatic agent of the composite non-woven fabric for the PU synthetic leather is 5-50 μm; the antibacterial antistatic agent is more than one of silver powder or silver-coated copper powder. D50 is less than 5 mu m, the antibacterial antistatic agent is not easy to form a continuous phase in the polyacrylic acid graft modified polyurethane solution, and the antibacterial antistatic effect can not meet the requirement; d50 is more than 50 mu m, the antibacterial and antistatic agent is easy to settle in the polyacrylic acid graft modified polyurethane solution, the concentration of the silver-based antibacterial and antistatic additive is not uniform, and the antibacterial and antistatic effect is not stable.
The invention also provides a preparation method of the composite non-woven fabric for the PU synthetic leather, which is used for preparing the composite non-woven fabric for the PU synthetic leather and comprises the following steps:
(1) etching one side of the interlayer cloth by adopting a pulse laser beam to obtain the interlayer cloth with a microgroove structure on one side; compared with other technologies such as plasma and the like, the microgrooves formed by the method have more uniform width and depth, and are beneficial to uniformly dispersing the auxiliary agent in the microgrooves to form an ordered structure, so that the antibacterial antistatic agent can be orderly and continuously arranged along the direction of the microgrooves to form a conductive path;
(2) dipping sandwich cloth with a micro-groove structure on one side into finishing liquid containing an antibacterial and antistatic agent, drying, crosslinking and curing to obtain the sandwich cloth containing the antibacterial and antistatic agent;
(3) the method comprises the following steps of (1) taking an interlayer cloth containing an antibacterial antistatic agent as a bottom cloth and taking a non-woven fabric consisting of sea-island fibers as an upper cloth; compounding the sandwich cloth containing the antibacterial antistatic agent and the non-woven cloth consisting of the sea-island fibers by adopting a needle punching method to prepare a composite non-woven cloth; wherein, the side of the sandwich cloth containing the antibacterial antistatic agent and provided with the microgrooves faces the non-woven fabric.
In the preparation of the sea-island fiber, the drafting multiple is 1-5 times, and the drafting temperature is 50-80 ℃; preferably, the drafting multiple is 3-5 times, the drafting temperature is 50-70 ℃, and then the non-woven fabric is dried, shaped, curled, cut and packaged for use; the needle punching method can entangle the sea-island fiber with the fiber in the interlayer cloth, so as to realize the composite of the non-peelable double-layer structure between the non-woven fabric and the interlayer cloth, the composite structure can keep the structural characteristics of the sea-island fiber, is not influenced in the fiber opening process of the synthetic leather, ensures that the mechanical property of the synthetic leather is excellent, and can also utilize the antibacterial and antistatic property in the interlayer cloth. The needling density of a needling machine adopted in the needling method is 200-300 times/cm 2, the needle depth is 8-10 mm, 6-8 mm, 4-6 mm, 2-4 mm and 0mm in sequence, and the vehicle speed is 2-3 m/min.
As a preferred technical scheme:
the preparation method of the composite non-woven fabric for the PU synthetic leather comprises the step (1), wherein the energy of the pulse laser beam is 100-500 MW/cm2(ii) a Etching the pulse laser beam along a straight track;
in the step (2), the preparation process of the finishing liquid is as follows: adding the antibacterial antistatic agent into the polyacrylic acid graft modified polyurethane solution and uniformly stirring; the stirring speed is 500-1000 r/min, and the stirring time is 0.5-2 hours; the liquid carrying rate of the impregnated sandwich cloth with the microgroove structure on one side is 40-60 wt%, and the drying and crosslinking temperature is 80-140 ℃, preferably 110-140 ℃.
According to the preparation method of the composite non-woven fabric for the PU synthetic leather, in the finishing liquid, the mass concentration of the antibacterial antistatic agent is 0.1-5%, preferably 0.1-2.0%; the mass concentration of the polyacrylic acid grafted modified polyurethane is 20-30%, wherein the grafting rate of polyacrylic acid is 5-10%, and the solvent is deionized water. The mass concentration of the antibacterial antistatic agent is less than 0.1%, the attached amount of the antibacterial antistatic auxiliary agent is insufficient, and the antistatic property and the antibacterial property do not meet the requirements; if the mass concentration of the polyacrylic acid graft modified polyurethane is less than 20 percent and the grafting rate of the polyacrylic acid is less than 5 percent, the adhesiveness is not strong, the antibacterial and antistatic effect is not durable, and if the mass concentration of the polyacrylic acid graft modified polyurethane is more than 30 percent and the grafting rate of the polyacrylic acid is more than 10 percent, the fiber strength is reduced seriously, and the sandwich cloth is easy to be punctured when the non-woven fabric is needled.
The principle of the invention is as follows:
before the sandwich cloth is compounded with the non-woven fabric, an antibacterial and antistatic agent is fixed in a micro-groove structure on the surface of the sandwich cloth; the microgroove structure can ensure that the antibacterial antistatic agent is stably fixed on the sandwich cloth so as to ensure the excellent and lasting antibacterial and antistatic properties of the PU synthetic leather. Compared with the antibacterial and antistatic fiber prepared by the conventional spinning modification method, the method has no spinnability problem, and can prepare the fiber with high-concentration antibacterial and antistatic auxiliary agent content; compared with the conventional post-treatment method for modification, the antibacterial antistatic auxiliary agents are orderly arranged along the groove direction, so that a conductive path is easier to form, and the antibacterial antistatic auxiliary agents are in a disordered distribution state on the surface of the fabric and are often poor in effect in the conventional fabric impregnation; the antibacterial antistatic agent added in the invention can not be separated out in the subsequent treatment and use processes; conductive paths are formed along the fiber direction more easily, and the addition amount of the auxiliary agent is less when the same antistatic grade is achieved compared with a post-treatment method; the method can realize the impregnation of the high-concentration antibacterial antistatic agent, and compared with a blended spinning method, the method can prepare the synthetic leather with higher antibacterial and antistatic levels and smaller surface resistance due to the influence of the additive amount of the auxiliary agent on the spinnability.
The invention adopts a double-layer composite structure, and in order to ensure the mechanical property of the composite non-woven fabric, in the preparation process of the composite non-woven fabric, the woven antibacterial antistatic interlayer fabric is used as a base fabric, the non-woven fabric formed by sea-island fibers is compounded above the base fabric by a needle punching method, and the fibers of the double layers are intertwined with each other. Wherein, the good mechanical property is because: the process that after PU is impregnated and solidified in the non-woven fabric made of sea-island fibers, sea components are removed by an organic solvent to obtain superfine fibers is called as fiber opening, for a multi-layer non-woven fabric structure, the process that other fiber layers are covered on the surface of the sea-island fibers often hinders the fiber opening process of the sea-island fibers at the later stage to a certain extent and affects the fiber opening efficiency, and when the woven antibacterial antistatic interlayer fabric is used as a base fabric, the regular fabric structure enables the non-woven fabric and the interlayer fabric to be only entangled in the needle punching direction when the composite non-woven fabric is prepared in the needle punching process, the resistance of subsequent fiber opening is not caused, the tight covering of other fiber layers on the surface of the sea-island fibers caused by excessive entanglement is avoided, the fiber opening difficulty is caused, and the retention of the strength of the superfine fibers is ensured. The stable and durable antibacterial and antistatic property is achieved because: the elastic fiber is contained in the interlayer cloth, so that firm connection between the interlayer cloth and the non-woven cloth is facilitated in the needling process, and the composite strength of the interlayer cloth and the non-woven cloth is further improved; even after the sea-island fibers in the non-woven fabric are opened, the sandwich fabric and the sea-phase-separated superfine fibers still have good composite strength; if in the splitting process, the sandwich cloth is separated from the non-woven fabric formed by the sea-island fibers, the sandwich cloth cannot disperse the acting force on the non-woven fabric under the action of the external force, and the sandwich cloth has poor mechanical property after being subjected to antibacterial and antistatic modification and becomes a breaking point of the action of the external force, so that the performance of the whole PU leather is deteriorated.
Advantageous effects
(1) According to the preparation method of the composite non-woven fabric for the PU synthetic leather, firstly, microgrooves are formed on the surface of the interlayer fabric, so that the antibacterial antistatic agent can be fixed on the interlayer fabric, and the antibacterial antistatic property of the interlayer fabric is durable; secondly, compounding the antibacterial and antistatic interlayer cloth and the sea-island fiber layer together by using a needle punching method to form a structure in which fibers are mutually entangled, and further, increasing the composite strength of the antibacterial and antistatic interlayer cloth and the sea-island fiber layer by adding spandex into the interlayer cloth so as to ensure the mechanical property and the antibacterial and antistatic property of the PU synthetic leather; the woven sandwich cloth is used, and the composite non-woven cloth prepared by the woven sandwich cloth does not influence the subsequent opening process of the sea-island fibers;
(2) the composite non-woven fabric for PU synthetic leather has the bacteriostasis rate of 90.0-99.9% on staphylococcus aureus, the bacteriostasis rate of 90.0-99.9% on Klebsiella pneumoniae and the surface resistance of 1 multiplied by 103～1×106Ohm, and the PU synthetic leather is washed for 20 times by the method of AATCC 135 plus 2018, the bacteriostasis rate to staphylococcus aureus is 90.0-95%, the bacteriostasis rate to Klebsiella pneumoniae is 90.0-95%, and the surface resistance is 1 multiplied by 103～1×106Ohm, and the tearing strength of the PU synthetic leather is 100-130N.
Detailed Description
The invention will be further illustrated with reference to specific embodiments. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
The test method adopted by the invention is as follows:
(1) and (3) antibacterial property test: testing the antibacterial rate of the Klebsiella pneumoniae by applying a standard ASTM E2149-13a method to the PU synthetic leather for applying the applied to the applied Staphylococcus aureus bacteriostasis test;
(2) and (3) testing antistatic property: testing the surface resistance value of the PU synthetic leather by adopting a method of the standard GB/T24249-;
(3) and (3) testing the antibacterial and antistatic durability: washing the PU synthetic leather for 20 times by adopting an AATCC 135-plus 2018 washing method, and testing the antibacterial property and the antistatic property of the PU synthetic leather according to the ASTM E2149-13a method and the GB/T24249-plus 2009 method respectively;
(4) tear strength test criteria: the tearing strength of the PU synthetic leather is tested by adopting a standard ISO 3377-1: 2011.
The woven fabric used in the examples was purchased from minxin long textile commercial products;
the polyacrylic acid graft-modified polyurethane used in the examples was purchased from Guangzhou Henry, a commercial product of New Material Co., Ltd;
the silver-coated copper powder used in the examples was purchased from silver peak metal technology ltd, guangzhou;
silver powder used in the examples was purchased from Sharp alloy solder materials, Inc. of Nanogong.
In all the following examples and comparative examples, the process of preparing the composite non-woven fabric into the PU synthetic leather comprises the following steps: the composite non-woven fabric is dipped in polyurethane slurry, and is subjected to solidification, water washing (the water washing is used for washing a DMF solvent brought by PU), fiber opening (LDPE in the composite non-woven fabric is extracted by toluene at the temperature of 80 ℃), sheet skin, skin grinding, dyeing and water washing and drying to prepare PU synthetic leather; the thickness of the prepared PU synthetic leather is 1.2 mm.
Example 1
A preparation method of a composite non-woven fabric for PU synthetic leather comprises the following steps:
(1) etching one side of the woven fabric (prepared by blending 70D nylon (PA6) and 40D spandex in a mass ratio of 9: 1) by adopting a pulse laser beam to obtain sandwich cloth with a microgroove structure on one side; wherein the energy of the pulse laser beam is 100MW/cm2(ii) a The width of the micro-groove is 200 μm, and the depth is 200 μm;
(2) preparing finishing liquid: adding an antibacterial antistatic agent (silver-coated copper powder with the median particle size D50 of 5 mu m) into the polyacrylic acid grafted modified polyurethane solution, and uniformly stirring to obtain a finishing liquid; wherein the stirring speed is 500 r/min, and the stirring time is 1 hour; in the finishing liquid, the mass concentration of the antibacterial antistatic agent is 0.1 percent; the mass concentration of the polyacrylic acid graft modified polyurethane solution is 20%, wherein the grafting rate of polyacrylic acid is 5%, and the solvent is deionized water;
(3) dipping the sandwich cloth with the microgroove structure on one side into finishing liquid containing the antibacterial antistatic agent, and drying to obtain the sandwich cloth containing the antibacterial antistatic agent; wherein the impregnation liquid carrying rate is 40 wt%, and the drying temperature is 110 ℃;
(4) compounding the antibacterial antistatic agent interlayer cloth and the non-woven fabric formed by the sea-island fibers by adopting a needle punching method to prepare a composite non-woven fabric; wherein, the side of the sandwich cloth containing the antibacterial antistatic agent, which is provided with the microgrooves, faces the non-woven fabric; in the sea-island fiber, the sea component is made of LDPE, and the island component is made of PA 6; the volume ratio of the island component to the sea component is 70: 30; in the preparation process of the sea-island fiber, the drafting multiple is 3 times, the drafting temperature is 50 ℃, and the number of the fibers in the island component is 37;
the needle density of a needle machine adopted in the needle punching method is 200 times/cm2The needle depth is 8mm, 6mm, 4mm, 2mm and 0mm in sequence, and the vehicle speed is 2 m/min;
the prepared composite non-woven fabric comprises non-woven fabric consisting of sea-island fibers, interlayer fabric and an antibacterial antistatic agent fixed in microgrooves of the interlayer fabric; the non-woven fabric is firmly connected with the interlayer fabric;
the PU synthetic leather prepared from the composite non-woven fabric has 90.2 percent of bacteriostasis rate to staphylococcus aureus, 90.5 percent of bacteriostasis rate to klebsiella pneumoniae and 1 multiplied by 10 of surface resistance6Ohm, tearing strength is 130N, the PU synthetic leather is washed for 20 times according to the AATCC 135-plus-2018 method, the bacteriostasis rate to staphylococcus aureus is 90 percent, the bacteriostasis rate to Klebsiella pneumoniae is 90.1 percent, and the surface resistance is 1 multiplied by 106Ohm.
Comparative example 1
A preparation method of a composite non-woven fabric for PU synthetic leather basically comprises the same steps as example 1, except that the woven fabric in the step (1) is prepared by blending 70D nylon (PA6)/40D spandex in a mass ratio of 9.7: 0.3; preparing the obtained composite non-woven fabric into PU synthetic leather; the performance indexes of the PU synthetic leather are shown in Table 1.
Comparative example 2
A preparation method of compound non-woven fabrics for PU synthetic leather basically comprises the same steps as the example 1, except that the antibacterial antistatic agent in the step (2) is silver-coated copper powder with the median particle diameter D50 of 2 μm; preparing the obtained composite non-woven fabric into PU synthetic leather; the performance indexes of the PU synthetic leather are shown in Table 1.
Comparative example 3
A method for preparing a composite non-woven fabric for PU synthetic leather, which comprises the steps substantially the same as those of example 1, except that the step (1) is not performed, that is, the interlayer fabric in the step (3) does not contain microgrooves; preparing the obtained composite non-woven fabric into PU synthetic leather; the performance indexes of the PU synthetic leather are shown in Table 1.
TABLE 1
Performance index Unit of Example 1 Comparative example 1 Comparative example 2 Comparative example 3
Bacteriostatic rate of staphylococcus aureus ％ 90.2 90.3 90.1 86.4
Bacteriostasis rate of klebsiella pneumoniae ％ 90.5 90.6 90.5 87.9
Surface resistance Ohm meter 1×106 1×106 3×107 2×108
Tear strength N 130 85 135 142
Antibacterial rate of staphylococcus aureus tested after washing ％ 90.0 90 90.1 78.4
Bacteriostatic rate of Klebsiella pneumoniae tested after water washing ％ 90.1 90.2 90.3 77.9
Surface resistance measured after washing Ohm meter 1×106 1×106 3×107 8×109
Comparing comparative example 1 with example 1, it can be seen that the tear strength of the PU synthetic leather prepared in comparative example 1 is significantly lower than that of example 1, because the spandex content of the woven fabric in comparative example 1 is very low, and the presence of spandex is favorable for the non-woven fabric and the sandwich fabric to be firmly connected during the needling process, so that the prepared composite non-woven fabric still has close adhesion with the sandwich fabric after the fiber opening treatment, and the sandwich fabric is not easily damaged by the impact force generated by a high-strength needle machine due to the spandex contained therein. When the content of spandex in the interlayer fabric is too small, the effect of improving the firm connection between the non-woven fabric and the woven fabric layer is not large.
Comparing comparative example 2 with example 1, it can be seen that the surface resistance of the PU synthetic leather prepared in comparative example 2 is significantly higher than that of example 1, because in comparative example 2, the median particle size of the antibacterial antistatic agent used is too small, and when the finishing liquid containing the antibacterial antistatic agent is used for impregnating woven fabric, the antibacterial antistatic agent has poor dispersion distribution in the microgrooves, and a continuous phase is not easily formed, so that the antibacterial antistatic effect does not meet the requirements.
Comparing comparative example 3 with example 1, it can be seen that the PU synthetic leather prepared in comparative example 3 has poor antistatic and antibacterial effects, and the durability of the antibacterial and antistatic properties is slightly reduced. Compared with the prior art, the fiber is not subjected to grooving treatment in the comparative example 3, the mechanical property of the fiber is slightly higher than that of the fiber in the example 1, but the antistatic effect is not good because the antistatic effect is usually realized by regularly arranging the antistatic additives to form a conductive path, the surface of the composite non-woven fabric prepared in the comparative example 3 does not contain a micro-groove structure, the antistatic additives enriched on the surface of the composite non-woven fabric are usually irregular and are not beneficial to forming the conductive path, and the antibacterial antistatic additives in the example 1 are orderly arranged along the groove direction to form the conductive path more easily, so that the surface resistance of the fiber in the comparative example 3 is higher, and the; the reason why the antibacterial effect is weakened is: when finishing with finishing liquor with the same concentration, the grooves can be loaded with relatively more auxiliaries, so that the antibacterial effect in the embodiment 1 is better; in addition, the durability of the antibacterial and antistatic properties is slightly reduced in comparative example 3 because the auxiliary is concentrated on the surface of the fabric, and the bonding property with the fabric is relatively poor compared to the method of example 1 using the slot filling, and the antibacterial and antistatic effects are slightly reduced after a plurality of washings.
Example 2
A preparation method of a composite non-woven fabric for PU synthetic leather comprises the following steps:
(1) etching one side of the woven fabric (prepared by blending 70D nylon (PA66) and 40D spandex in a mass ratio of 9.5: 0.5) by adopting a pulse laser beam to obtain sandwich cloth with a micro-groove structure on one side; wherein the energy of the pulse laser beam is 200MW/cm2(ii) a The width of the micro-groove is 250 μm, and the depth is 250 μm;
(2) preparing finishing liquid: adding an antibacterial antistatic agent (silver powder with the median particle size D50 of 10 mu m) into the polyacrylic acid grafted modified polyurethane solution, and uniformly stirring to obtain a finishing liquid; wherein the stirring speed is 600 revolutions per minute, and the stirring time is 1 hour; in the finishing liquid, the mass concentration of the antibacterial antistatic agent is 0.5 percent; the mass concentration of the polyacrylic acid graft modified polyurethane solution is 22%, wherein the grafting rate of polyacrylic acid is 6%, and the solvent is deionized water;
(3) dipping the sandwich cloth with the microgroove structure on one side into finishing liquid containing the antibacterial antistatic agent, and drying to obtain the sandwich cloth containing the antibacterial antistatic agent; wherein the impregnation liquid carrying rate is 45 wt%, and the drying temperature is 120 ℃;
(4) compounding the antibacterial antistatic agent interlayer cloth and the non-woven fabric formed by the sea-island fibers by adopting a needle punching method to prepare a composite non-woven fabric; wherein, the side of the sandwich cloth containing the antibacterial antistatic agent, which is provided with the microgrooves, faces the non-woven fabric; in the sea-island fiber, the sea component is made of LDPE, and the island component is made of PA 66; the volume ratio of the island component to the sea component is 80: 20; in the preparation process of the sea-island fiber, the drafting multiple is 1 time, the drafting temperature is 60 ℃, and the number of the fibers in the island component is 16;
the needle density of a needle machine adopted in the needle punching method is 220 times/cm2The needle depth is 8mm, 6mm, 4mm, 2mm and 0mm in sequence, and the vehicle speed is 2.5 m/min;
the prepared composite non-woven fabric comprises non-woven fabric consisting of sea-island fibers, interlayer fabric and an antibacterial antistatic agent fixed in microgrooves of the interlayer fabric; the non-woven fabric is firmly connected with the interlayer fabric;
the PU synthetic leather prepared from the composite non-woven fabric has the bacteriostasis rate of 95 percent on staphylococcus aureus, the bacteriostasis rate of 94.8 percent on klebsiella pneumoniae and the surface resistance of 1 multiplied by 105Ohm, tearing strength is 121N, the PU synthetic leather is washed for 20 times according to the AATCC 135-plus-2018 method, the bacteriostasis rate to staphylococcus aureus is 93.6%, the bacteriostasis rate to klebsiella pneumoniae is 92.5%, and the surface resistance is 1 multiplied by 105Ohm.
Example 3
A preparation method of a composite non-woven fabric for PU synthetic leather comprises the following steps:
(1) etching one side of the woven fabric (prepared by blending 70D nylon (PA6) and 40D spandex in a mass ratio of 9.4: 0.6) by adopting a pulse laser beam to obtain sandwich cloth with a micro-groove structure on one side; wherein the energy of the pulse laser beam is 230MW/cm2(ii) a The width of the micro-groove is 310 μm, and the depth is 360 μm;
(2) preparing finishing liquid: adding an antibacterial antistatic agent (silver powder with the median particle size D50 of 25 mu m) into the polyacrylic acid grafted modified polyurethane solution, and uniformly stirring to obtain a finishing liquid; wherein the stirring speed is 750 revolutions per minute, and the stirring time is 0.5 hour; in the finishing liquid, the mass concentration of the antibacterial antistatic agent is 1 percent; the mass concentration of the polyacrylic acid graft modified polyurethane solution is 24%, wherein the grafting rate of polyacrylic acid is 7%, and the solvent is deionized water;
(3) dipping the sandwich cloth with the microgroove structure on one side into finishing liquid containing the antibacterial antistatic agent, and drying to obtain the sandwich cloth containing the antibacterial antistatic agent; wherein the impregnation liquid carrying rate is 50 wt%, and the drying temperature is 80 ℃;
(4) compounding the antibacterial antistatic agent interlayer cloth and the non-woven fabric formed by the sea-island fibers by adopting a needle punching method to prepare a composite non-woven fabric; wherein, the side of the sandwich cloth containing the antibacterial antistatic agent, which is provided with the microgrooves, faces the non-woven fabric; in the sea-island fiber, the sea component is made of LDPE, and the island component is made of PA 6; the volume ratio of the island component to the sea component is 75: 25; in the preparation process of the sea-island fiber, the drafting multiple is 5 times, the drafting temperature is 80 ℃, and the number of the fibers in the island component is 55;
the needle density of a needle machine adopted in the needle punching method is 250 times/cm2The needle depth is 8mm, 6mm, 4mm, 2mm and 0mm in sequence, and the vehicle speed is 2 m/min;
the prepared composite non-woven fabric comprises non-woven fabric consisting of sea-island fibers, interlayer fabric and an antibacterial antistatic agent fixed in microgrooves of the interlayer fabric; the non-woven fabric is firmly connected with the interlayer fabric;
the PU synthetic leather prepared from the composite non-woven fabric has 99.9 percent of bacteriostasis rate to staphylococcus aureus, 99.9 percent of bacteriostasis rate to klebsiella pneumoniae and 1 multiplied by 10 of surface resistance3Ohm, tear strength 109N, PU synthetic leather after 20 times of water washing according to AATCC 135-plus 2018 method, the bacteriostasis rate to staphylococcus aureus is 94.9%, the bacteriostasis rate to klebsiella pneumoniae is 94.8%, and the surface resistance is 1 multiplied by 103Ohm.
Example 4
A preparation method of a composite non-woven fabric for PU synthetic leather comprises the following steps:
(1) etching one side of the woven fabric (prepared by blending 70D nylon (PA46) and 40D spandex in a mass ratio of 9.2: 0.8) by adopting a pulse laser beam to obtain sandwich cloth with a micro-groove structure on one side; wherein the energy of the pulse laser beam is 350MW/cm2(ii) a The width of the micro-groove is 370 μm, and the depth is 420 μm;
(2) preparing finishing liquid: adding an antibacterial antistatic agent (silver powder with the median particle size D50 of 35 mu m) into the polyacrylic acid grafted modified polyurethane solution, and uniformly stirring to obtain a finishing liquid; wherein the stirring speed is 850 revolutions per minute, and the stirring time is 1.5 hours; in the finishing liquid, the mass concentration of the antibacterial antistatic agent is 1.5 percent; the mass concentration of the polyacrylic acid graft modified polyurethane solution is 26%, wherein the grafting rate of polyacrylic acid is 8%, and the solvent is deionized water;
(3) dipping the sandwich cloth with the microgroove structure on one side into finishing liquid containing the antibacterial antistatic agent, and drying to obtain the sandwich cloth containing the antibacterial antistatic agent; wherein the impregnation liquid carrying rate is 55 wt%, and the drying temperature is 110 ℃;
(4) compounding the antibacterial antistatic agent interlayer cloth and the non-woven fabric formed by the sea-island fibers by adopting a needle punching method to prepare a composite non-woven fabric; wherein, the side of the sandwich cloth containing the antibacterial antistatic agent, which is provided with the microgrooves, faces the non-woven fabric; in the sea-island fiber, the sea component is made of LDPE, and the island component is made of PA 46; the volume ratio of the island component to the sea component is 70: 30; in the preparation process of the sea-island fiber, the drafting multiple is 2 times, the drafting temperature is 55 ℃, and the number of the fibers in the island component is 64;
the needle density of a needle machine adopted in the needle punching method is 230 times/cm2The needle depth is 8mm, 6mm, 4mm, 2mm and 0mm in sequence, and the vehicle speed is 3 m/min;
the prepared composite non-woven fabric comprises non-woven fabric consisting of sea-island fibers, interlayer fabric and an antibacterial antistatic agent fixed in microgrooves of the interlayer fabric; the non-woven fabric is firmly connected with the interlayer fabric;
the PU synthetic leather prepared from the composite non-woven fabric has the bacteriostasis rate of 96.2 percent on staphylococcus aureus, the bacteriostasis rate of 97 percent on klebsiella pneumoniae and the surface resistance of 1 multiplied by 106Ohm, tear strength is 101N, the PU synthetic leather is washed for 20 times according to the AATCC 135-plus 2018 method, the bacteriostasis rate to staphylococcus aureus is 95 percent, the bacteriostasis rate to klebsiella pneumoniae is 92.2 percent, and the surface resistance is 1 multiplied by 106Ohm.
Example 5
A preparation method of a composite non-woven fabric for PU synthetic leather comprises the following steps:
(1) etching one side of the woven fabric (prepared by blending 70D nylon (PA66) and 40D spandex in a mass ratio of 0.85: 0.15) by adopting a pulse laser beam to obtain the sandwich fabric with the microgroove structure on one side; wherein the energy of the pulse laser beam is 450MW/cm2(ii) a The width of the micro-groove is 450 μm, and the depth is 500 μm;
(2) preparing finishing liquid: adding an antibacterial antistatic agent (a mixture of silver powder and silver-coated copper powder in a mass ratio of 1:1, wherein the median particle diameter D50 of the mixture is 10 mu m) into a polyacrylic acid grafted modified polyurethane solution, and uniformly stirring to obtain a finishing liquid; wherein the stirring speed is 900 revolutions per minute, and the stirring time is 2 hours; in the finishing liquid, the mass concentration of the antibacterial antistatic agent is 2 percent; the mass concentration of the polyacrylic acid graft modified polyurethane solution is 28%, wherein the grafting rate of polyacrylic acid is 9%, and the solvent is deionized water;
(3) dipping the sandwich cloth with the microgroove structure on one side into finishing liquid containing the antibacterial antistatic agent, and drying to obtain the sandwich cloth containing the antibacterial antistatic agent; wherein the impregnation liquid carrying rate is 45 wt%, and the drying temperature is 140 ℃;
(4) compounding the antibacterial antistatic agent interlayer cloth and the non-woven fabric formed by the sea-island fibers by adopting a needle punching method to prepare a composite non-woven fabric; wherein, the side of the sandwich cloth containing the antibacterial antistatic agent, which is provided with the microgrooves, faces the non-woven fabric; in the sea-island fiber, the sea component is made of LDPE, and the island component is made of PA 66; the volume ratio of the island component to the sea component is 73: 27; in the preparation process of the sea-island fiber, the drafting multiple is 4 times, the drafting temperature is 75 ℃, and the number of the fibers in the island component is 45;
the needle density of a needle machine adopted in the needle punching method is 260 times/cm2The needle depth is 8mm, 6mm, 4mm, 2mm and 0mm in sequence, and the vehicle speed is 3 m/min;
the prepared composite non-woven fabric comprises non-woven fabric consisting of sea-island fibers, interlayer fabric and an antibacterial antistatic agent fixed in microgrooves of the interlayer fabric; the non-woven fabric is firmly connected with the interlayer fabric;
the PU synthetic leather prepared from the composite non-woven fabric has 99.9 percent of bacteriostasis rate to staphylococcus aureus, 99.9 percent of bacteriostasis rate to klebsiella pneumoniae and 1 multiplied by 10 of surface resistance3Ohm, tearing strength 112N, the PU synthetic leather is washed for 20 times according to AATCC 135-plus 2018 method, the bacteriostasis rate to staphylococcus aureus is 93.6%, the bacteriostasis rate to Klebsiella pneumoniae is 92%, and the surface resistance is 1 multiplied by 103Ohm.
Example 6
A preparation method of a composite non-woven fabric for PU synthetic leather comprises the following steps:
(1) etching one side of the woven fabric (prepared by blending 70D nylon (PA10) and 40D spandex in a mass ratio of 9.1: 0.9) by adopting a pulse laser beam to obtain sandwich cloth with a micro-groove structure on one side; wherein the energy of the pulse laser beam is 500MW/cm2(ii) a The width of the micro-groove is 500 μm, and the depth is 250 μm;
(2) preparing finishing liquid: adding an antibacterial antistatic agent (silver-coated copper powder with the median particle size D50 of 50 mu m) into the polyacrylic acid grafted modified polyurethane solution, and uniformly stirring to obtain a finishing liquid; wherein the stirring speed is 1000 revolutions per minute, and the stirring time is 1.5 hours; in the finishing liquid, the mass concentration of the antibacterial antistatic agent is 5 percent; the mass concentration of the polyacrylic acid graft modified polyurethane solution is 30%, wherein the grafting rate of polyacrylic acid is 10%, and the solvent is deionized water;
(3) dipping the sandwich cloth with the microgroove structure on one side into finishing liquid containing the antibacterial antistatic agent, and drying to obtain the sandwich cloth containing the antibacterial antistatic agent; wherein the impregnation liquid carrying rate is 60 wt%, and the drying temperature is 135 ℃;
(4) compounding the antibacterial antistatic agent interlayer cloth and the non-woven fabric formed by the sea-island fibers by adopting a needle punching method to prepare a composite non-woven fabric; wherein, the side of the sandwich cloth containing the antibacterial antistatic agent, which is provided with the microgrooves, faces the non-woven fabric; in the sea-island fiber, the sea component is made of LDPE, and the island component is made of PA 10; the volume ratio of the island component to the sea component is 80: 20; in the preparation process of the sea-island fiber, the drafting multiple is 3 times, the drafting temperature is 60 ℃, and the number of the fibers in the island component is 48;
the needle density of a needle machine adopted in the needle punching method is 280 times/cm2The needle depth is 8mm, 6mm, 4mm, 2mm and 0mm in sequence, and the vehicle speed is 2.5 m/min;
the prepared composite non-woven fabric comprises non-woven fabric consisting of sea-island fibers, interlayer fabric and an antibacterial antistatic agent fixed in microgrooves of the interlayer fabric; the non-woven fabric is firmly connected with the interlayer fabric;
the PU synthetic leather prepared from the composite non-woven fabric has the bacteriostasis rate of 97.3 percent on staphylococcus aureus and 98.6 percent on klebsiella pneumoniae% surface resistance of 1X 104Ohm, tearing strength is 114N, the PU synthetic leather is washed for 20 times according to the method of AATCC 135-plus 2018, the bacteriostasis rate to staphylococcus aureus is 92 percent, the bacteriostasis rate to Klebsiella pneumoniae is 91.7 percent, and the surface resistance is 1 multiplied by 104Ohm.

Claims (10)

1. The utility model provides a compound non-woven fabrics that PU synthetic leather was used which characterized by: comprises non-woven fabrics, sandwich fabrics and an antibacterial antistatic agent fixed in a microgroove of the sandwich fabrics; the non-woven fabric is firmly connected with the interlayer fabric; the microgrooves are positioned on one side of the sandwich fabric facing the non-woven fabric; the non-woven fabric is composed of sea-island fibers; the sandwich cloth contains elastic fiber.
2. The composite nonwoven fabric for PU synthetic leather according to claim 1, wherein the PU synthetic leather made of the composite nonwoven fabric has an inhibitory rate of 90.0% -99.9% against Staphylococcus aureus, an inhibitory rate of 90.0% -99.9% against Klebsiella pneumoniae, and a surface resistance of 1 x 103～1×106Ohm;
the PU synthetic leather prepared from the composite non-woven fabric is washed for 20 times by the AATCC 135-plus 2018 method, and the bacteriostasis rate to staphylococcus aureus is 90.0-95.0%, the bacteriostasis rate to klebsiella pneumoniae is 90.0-95.0%, and the surface resistance is 1 multiplied by 103～1×106Ohm;
the tearing strength of the PU synthetic leather prepared from the composite non-woven fabric is 100-130N.
3. The composite nonwoven fabric for PU synthetic leather according to claim 1, wherein the elastic fiber is spandex.
4. The composite nonwoven fabric for PU synthetic leather according to claim 1, wherein in the sea-island fiber, the sea component is LDPE, and the island component is PA; the volume ratio of the island component to the sea component is 70: 30-80: 20; the number of the islands in the sea-island fiber is 16-64.
5. The composite non-woven fabric for PU synthetic leather according to claim 3, wherein in the sandwich fabric, the content of spandex is 5-15 wt%, and the rest components are the same material as island components in the island fibers; the firm connection is realized by a needle punching method.
6. The composite nonwoven fabric for PU synthetic leather according to claim 1, wherein the interlayer fabric is woven fabric; the width of the micro-groove is 200-500 μm, and the depth is 200-500 μm.
7. The composite non-woven fabric for PU synthetic leather according to claim 1, wherein the median particle diameter D50 of the antibacterial antistatic agent is 5-50 μm; the antibacterial antistatic agent is silver powder and/or silver-coated copper powder.
8. A preparation method of a composite non-woven fabric for PU synthetic leather, which is used for preparing the composite non-woven fabric for PU synthetic leather according to any one of claims 1 to 7, and is characterized by comprising the following steps:
(1) etching one side of the interlayer cloth by adopting a pulse laser beam to obtain the interlayer cloth with a microgroove structure on one side;
(2) dipping the sandwich cloth with the microgroove structure on one side into finishing liquid containing the antibacterial antistatic agent, and drying to obtain the sandwich cloth containing the antibacterial antistatic agent;
(3) compounding the sandwich cloth containing the antibacterial antistatic agent and the non-woven cloth consisting of the sea-island fibers by adopting a needle punching method to prepare a composite non-woven cloth; wherein, the side of the sandwich cloth containing the antibacterial antistatic agent and provided with the microgrooves faces the non-woven fabric.
9. The method for preparing the composite non-woven fabric for PU synthetic leather according to claim 8, wherein in the step (1), the energy of the pulse laser beam is 100-500 MW/cm2(ii) a Etching the pulse laser beam along a straight track;
in the step (2), the preparation process of the finishing liquid is as follows: adding the antibacterial antistatic agent into the polyacrylic acid graft modified polyurethane solution and uniformly stirring; the stirring speed is 500-1000 r/min, and the stirring time is 0.5-2 hours; the liquid carrying rate of the sandwich cloth with the microgroove structure on one side after impregnation is 40-60 wt%, and the drying temperature is 80-140 ℃.
10. The method for preparing the composite non-woven fabric for the PU synthetic leather according to claim 9, wherein the mass concentration of the antibacterial and antistatic agent in the finishing liquid is 0.1-5%; the mass concentration of the polyacrylic acid graft modified polyurethane solution is 20-30%, wherein the grafting rate of polyacrylic acid is 5-10%, and the solvent is deionized water.
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JPH11247072A (en) * 1998-03-05 1999-09-14 Toray Ind Inc Artificial leather and its production
US6767853B1 (en) * 1999-07-05 2004-07-27 Kuraray Co., Ltd. Fibrous substrate for artificial leather and artificial leather using the same
US20050009426A1 (en) * 2002-02-01 2005-01-13 Young-Nam Hwang Composite sheet used for artificial leather with low elongation and excellent softness
TWI230216B (en) * 2002-03-11 2005-04-01 San Fang Chemical Industry Co Manufacture method for artificial leather composite reinforced with ultra-fine fiber non-woven fabric
JP2008121128A (en) * 2006-11-09 2008-05-29 Kuraray Co Ltd Artificial leather and method for producing the same
JP2008231585A (en) * 2007-03-16 2008-10-02 Teijin Fibers Ltd Method for producing moisture-permeable and waterproof fabric, moisture-permeable and waterproof fabric and textile product
CN202072964U (en) * 2011-03-23 2011-12-14 汤为人 Bacteriostatic deodorant ultrafine-fiber artificial leather

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Publication number Priority date Publication date Assignee Title
JPH11247072A (en) * 1998-03-05 1999-09-14 Toray Ind Inc Artificial leather and its production
US6767853B1 (en) * 1999-07-05 2004-07-27 Kuraray Co., Ltd. Fibrous substrate for artificial leather and artificial leather using the same
US20050009426A1 (en) * 2002-02-01 2005-01-13 Young-Nam Hwang Composite sheet used for artificial leather with low elongation and excellent softness
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