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CN101343817A - Low-density nonwoven fabric and production method and installation therefor and uses - Google Patents

Low-density nonwoven fabric and production method and installation therefor and uses Download PDF

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Publication number
CN101343817A
CN101343817A CNA2008101260231A CN200810126023A CN101343817A CN 101343817 A CN101343817 A CN 101343817A CN A2008101260231 A CNA2008101260231 A CN A2008101260231A CN 200810126023 A CN200810126023 A CN 200810126023A CN 101343817 A CN101343817 A CN 101343817A
Authority
CN
China
Prior art keywords
fabric
web
nonwoven fabric
die head
method described
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.)
Pending
Application number
CNA2008101260231A
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Chinese (zh)
Inventor
弗雷德里克·诺艾尔
切德瑞克·洛朗
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.)
Rieter Perfojet SAS
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Rieter Perfojet SAS
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Filing date
Publication date
Application filed by Rieter Perfojet SAS filed Critical Rieter Perfojet SAS
Publication of CN101343817A publication Critical patent/CN101343817A/en
Pending legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H18/00—Needling machines
    • D04H18/04—Needling machines with water jets
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/08—Melt spinning methods
    • D01D5/098—Melt spinning methods with simultaneous stretching
    • D01D5/0985—Melt spinning methods with simultaneous stretching by means of a flowing gas (e.g. melt-blowing)
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/005—Synthetic yarns or filaments
    • D04H3/007—Addition polymers
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/02—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
    • D04H3/10—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between yarns or filaments made mechanically
    • D04H3/11—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between yarns or filaments made mechanically by fluid jet
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
    • D04H3/14—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic yarns or filaments produced by welding
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
    • D04H3/16—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic filaments produced in association with filament formation, e.g. immediately following extrusion
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
    • Y10T442/681—Spun-bonded nonwoven fabric
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
    • Y10T442/682—Needled nonwoven fabric
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
    • Y10T442/689—Hydroentangled nonwoven fabric

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Nonwoven Fabrics (AREA)

Abstract

The invention concerns an installation for nonwoven production, characterized in that it comprises a spunbonded web plant whereof the die is inclined at an angle of 10 to 60 DEG and preferably of 20 to 50 DEG relative to the displacement direction of a conveyor and preferably two spunbonded web plants whereof the dies have opposite inclinations, said conveyor whereon filaments are deposited from the die(s) in the form of a web, a station for compressing the thus formed web into a web compressed perpendicular to its plane, optionally a station for calendering the compressed web, followed by a station for consolidating by pressurized water jet spray the compressed and optionally calendered web with a jet spraying machine comprising a metal fabric whereof the wires have a diameter between 0.10 and 0.35 mm and which has more than 40 wires per cm and preferably 10 to 30 wires per cm both in warp direction and in weft direction or with a water jet spraying machine including a sleeve with perforations of 50 to 600 microns and having 20 to 200 perforations per cm<2>.

Description

Low-density nonwoven fabric and production method thereof and device and purposes
Technical field
The present invention relates to a kind of nonwoven fabric, and relate to its production method and device and relate to its application.
Background technology
Make amenities, such as paper diaper, adult incontinent pads, sanitary napkins etc. wish that their material of manufacturing has alap density and tensile strength is isotropism as far as possible.
Summary of the invention
To achieve these goals, the invention provides a kind of method of producing nonwoven fabric, in the method, the filament that comes out from the spunbond unit that has die head is precipitated as vertically (longitudinal direction) fabric web at conveyer belt, this fabric web is along perpendicular to the compacted fabric web of the compacted formation of the direction on its plane one, under the pressure of 50 to 500 crust, be that 50 to 250 microns water jet sprays this compacted fabric web so that it is fixed then with diameter.According to the present invention, use at least one spunbond unit that this fabric web is deposited on the conveyer belt, the die head of this spunbond unit with respect to longitudinal direction with 10 ° to 60 °, the angle that is preferably 20 ° to 50 ° tilts, and at least two spunbond unit of preferred use, their die head incline direction is opposite, water spray sprays this fabric web or is inserted on the metal fabric (metal fabric), perhaps be inserted on the sleeve pipe of wearing micropore, the diameter of the fine rule on the metal fabric is between the 0.10mm to 0.35mm, every centimetre of the warp-wise of this metal fabric has every centimetre of 40 warps and broadwise 40 parallels at the most at the most, the size of the micropore on the sleeve pipe is between 50 to 600 microns, be preferably between 150 to 500 microns, and the quantity of the micropore that has on this sleeve pipe is 50 to 200 every square centimeter.
Preferably, the diameter of fine rule is between 0.18 to 0.30mm, and in this fabric on warp-wise and the broadwise quantity of every centimetre fine rule be 15 to 30.
Under these conditions, the non-woven fleece of making in accordance with the present production process of making by filament, its density is lower than 0.10g/cm 2, particularly between 0.09g/cm 2To 0.03g/cm 2Between, the result is 0.07 to 0.03g/cm better 2Between.The last tensile strength of machine direction is lower than 1.5 with the ratio of laterally last tensile strength, even can be lower than 1.3, or in fact is lower than 1.1.The nonwoven fabric that obtains according to the present invention like this has low-density and isotropic characteristics concurrently, these characteristics make this nonwoven fabric be used to produce diaper with incomparable advantage, perhaps, perhaps serve as a contrast as the outer textile that embodies the weaving face fabric outward appearance as the cover layer of the one side that contacts with infant skin.This nonwoven fabric according to the present invention also can be used for the cover layer of feminine hygiene articles, as the cover layer of producing crops in the farm, as filtered air, or the filter medium of gas or liquid, as the coating of matrix with as wipe product etc.Nonwoven fabric produced according to the invention has absorptivity and higher diffusivity preferably, and this makes it be particularly suitable for makeing diaper.And the liquid diffuser ring on nonwoven fabric of the present invention is circular basically, thereby has further improved the effective absorbing area of liquid.When being used to filter, find that it has bigger ground moment confining force, have only the moment confining force of the nonwoven fabric of the present invention of simple layer to be equivalent to the moment confining force of the filter medium of forming by 4 layers of fabric produced according to prior art.Further, prolonged the service life of filter medium.
As the cover layer of diaper, preferred fiber number between 1 to 3dtex and proportion 12 to 20g/m 2Between.As the extension layer of diaper or sanitary napkin, preferred fiber number between 3 to 8dtex, especially be between 3 to 7dtex and proportion 30 to 50g/m 2Between and 7dtex, extension layer is as absorbed layer like this.In order to ensure the sealing of the edge of these layers, preferably along the edge, fiber number between 1 to 3dtex and proportion 15 to 30g/m 2Between.On agricultural as the covering of cover plant, preferred fiber number between 2 to 6dtex, in particular between 3 to 4dtex and proportion 15 to 30g/m 2Between.Can be used for agricultural equally and go up reinforcement material.In filtration application, can have very different dtex fiber numbers, its excursion can be from 1 to 8dtex, and especially preferred fiber number is between 4 to 6dtex, and proportion is at 30g/m 2To 150g/m 2Between.In the application of wiping and backing coating, such as aspect building and the municipal engineering field employed those, and in hand work and synthetic leather goods, can use fiber number is between 1 to 8dtex, preferably fiber number is between 2 to 6dtex.
The present invention is suitable for not having crimped filaments, and it can make production method greatly simplify.Yet, also can select curling filament for use, although this is not preferred because it can make complex manufacturingization.
The special preferred specific gravity of the present invention 12 to 50g/m 2Between nonwoven fabric.
These notable features can obtain explaining from the following fact, owing to have the spunbond unit of inclination, obtained the fabric web that its filament can interwind better, thereby make that this fabric web is more wear-resisting, can not produce hole, rely on the pressure of water spray, the filament of the fabric web of generation is by bonding can the entanglement better of spraying water.
Preferably, be equipped with metal fabric, and the thickness of this metal fabric is between 0.40mm to 0.75mm with steel or copper.This metal fabric particularly preferably has plane knitting, twill weave or satin weave.
The first step of the inventive method comprises filament is deposited in and forms fabric web on the conveyer belt.Filament is especially by polyolefin, polyester, polyamide, polyvinyl alcohol, metallocenes, PLA or any other plastic material that is fit to preparation.The fiber number of filament is preferably between 0.9 to 10dtex.
They are exported from the die head at top, spunbond unit, vertically drop on the conveyer belt then, pass the device that makes it to cool off and extract out or make it attenuation with traditional approach, different is, according to the present invention, two spunbond unit of preferred use, with 10 ° to 60 °, the angle that is preferably 20 ° to 50 ° tilts their die head with respect to the fabric web longitudinal direction, and the incline direction of preferred two die heads is opposite, this longitudinal direction is the direction that conveyer belt moves, and may also be referred to as is machine direction.The angle of inclination of two die heads can be different, and one of them also can be perpendicular to the longitudinal direction of fabric web.
Second step of this method is included on the conveyer belt and this fabric web is compacted into a fabric web that compresses.This compaction process is finished by standard mechanical equipment, especially by making this fabric web pass two kneading points between the roller, or by making it compacted between a conveyer belt and a roller.
The 3rd step of the inventive method is included under the pressure of 50 to 500 crust, is that 50 to 250 microns water spray dashes and to penetrate this compacted fabric web with the fastening fabric web that this compresses with having diameter.This process comprises by the water spray entanglement makes this fabric web bonding, this is a traditional handicraft, different is, need make water spray pass metal fabric carefully, the fine rule of this metal fabric has predefined diameter dimension, quantity along the fine rule of every centimetre of weft direction and warp direction in this metal fabric is preestablished, perhaps by a sleeve pipe of wearing micropore, as previously mentioned.
The diameter of water spray is preferably between 80 microns to 200 microns.Usually, water spray apportion one row or number row are preferably a row.Distance among any row between two water sprays generally at 0.3mm between the 1.4mm, be preferably 0.4mm between the 0.6mm.Fastening processing also can be finished on the cylinder of several successive.Each cylinder is equipped with one or more spray nozzles, especially when speed of production is very high, such as per minute 800m.Under the condition of high-speed production, it is particularly useful to use the tank be connected with nozzle to be used to cover the water spray of bounce-back.Usually, described height at 200m/min between the 1000m/min.Particularly, fabric cylinder and the drum roll of wearing the sleeve pipe of micropore can be combined use.
Metal fabric is outer fabric again, can directly place on the back-up roller of rotation, but also can place on the more coarse metal fabric that is called internal layer fabric, and this metal fabric is made up of the fine rule that diameter is at least 0.5mm, and this fabric is as the draining fabric.The inner layer metal fabric is inserted between swing roller and the outer layer metal fabric, preferably contacts respectively with them.Cylinder comprises a fixing hollow circle tube device, has fluting around this cylinder-shaped device periphery, and these are slotted towards injector nozzle and are used to take away water.Fixing cylinder along its periphery, has one and comprises that rigidity soaks into the swing roller of support.This diameter of cylinder is preferably 500mm between the 900mm between 300 to 1000mm.The draw water groove relative with water spray preferably has the width between 5 to 50mm, and preferably between 15 to 40mm.The nonwoven fabric of producing by method of the present invention by the filament preparation has very high pliability.But, if do not consider pliability, can further improve two other desirable attribute as cylinder by the metal sleeve of selecting perforation for use, be low-density and make machine direction intensity/horizontal direction volume efficiency near consistent, the diameter in the hole of metal sleeve is between 50 to 600 microns, be preferably between 150 to 500 microns, every square centimeter has 20 to 200 holes, and preferred every square centimeter has 70 to 150 holes.
If also wish to improve the intensity of resulting nonwoven fabric, compacted fabric web must be passed through inferior light technology before fastened.This Asia light technology is to finish on the inferior ray machine of standard, temperature is 100 to 250 ℃, is preferably 130 to 170 ° ℃, this depend on the polymer structure composition of filament character (such as, for the polypropylene fabric net, preferably between 130 to 180 ℃, carry out), wherein 5 of the whole area of fabric web to 40%, be preferably 10 of the whole area of fabric web and melted to 30%, melting point can be circular, ellipse, rectangle, rhombus or similar shape.
Inferior light can comprise that the fabric web that makes thermoplastic filaments passes through between the roller of heating.In order to realize the present invention, the preferred inferior ray machine that comprises smooth roll and etched roll that uses.The temperature and pressure that inferior ray machine is applied causes that the point of the fabric web of being made up of continuous filament is molten.
Etching can comprise circle, ellipse, square, rectangle, or even the point of rhombus.The area of the point that melts on the fabric web surface is 2 to 40% of a whole area, is preferably 10 to 30%.
Also can use two rotation and overlapped negative and positive type etched rolls synchronously.Perhaps also can use two smooth roll.
Inferior light technology is to carry out under the pressure between the 150N/mm at 50N/mm.
The subvelocity of light degree of inferior ray machine can reach per minute hundreds of rice, particularly can be 100 to 800m/min.
If inferior light technology is attached in the inventive method, the intensity index of representing with the every gram newton of every 50mm of every square metre nonwoven fabric is good especially so.Intensity index can reach 2.8, promptly is 1.5 on the machine direction, is 1.3 in a lateral direction, and the proportion of this nonwoven fabric is 12 to 150g/m simultaneously 2Between, preferred 12 to 100g/m 2, more preferably 12 arrive 40g/m 2Index intensity is preferably at least 3.5 and more preferably be at least 4.5, even is at least 5.5, can reach.
Through comparing the 20g/m that traditional 1.7dtex polypropylene by 100% is formed 2Nonwoven fabric, through combing and inferior light, the thickness of manufactured goods is 0.16mm, and the tensile strength of machine direction is 40N/50mm, and the tensile strength of horizontal direction is 9N/50mm, and promptly machine direction intensity/horizontal direction ratio is 4.4.Because their mechanical attributes is relatively poor, can not reduce these weight through every square metre of the nonwoven fabric of combing and inferior light.Because nonwoven fabric of the present invention is to be made of continuous filament, it is bigger therefore can to obtain thickness, and intensity is higher, and isotropism is better, simultaneously the lower nonwoven fabric of every weight per square meter.
Through after the fastener, in order to have used the pressure water spray to tangle, the aspirator that the residual water that retains in the nonwoven fabric is linked to each other with vacuum generator is taken away, and this nonwoven fabric is dried then, such as in draft furnace, perhaps by infrared controller or use microwave etc.The nonwoven fabric moisture that finally obtains is lower than 5% of gross weight.
Before or after oven dry, can be on this nonwoven fabric the application surface activating agent.
The invention still further relates to a kind of device of producing nonwoven fabric, this device comprises at least one spunbond unit, this spunbond unit with respect to longitudinal direction with 10 ° to 60 °, preferred 20 ° to 50 ° angle tilts, and preferably comprise two spunbond unit at least, the incline direction of their die head is opposite, spunbond unit is deposited to filament and forms fabric web on the conveyer belt, this device comprises hold down gag, thereby be used for forming the fabric web that compresses along compress fabric web perpendicular to the fabric web plane, this device selectively comprises the inferior ray machine of this fabric web that compresses of press polish, and comprise a water injector, described water injector is under the pressure of 50 to 500 crust, with having diameter is that 50 to 250 microns water jet dashes and to penetrate this fabric web with fastening compacted and through the fabric web of optional press polish, and the device of described production nonwoven fabric comprises that foregoing water spray with sleeve pipe of metal fabric or perforation impacts machine.
Be used to test thickness, density, the laboratory test of machine direction intensity and horizontal direction intensity are to carry out according to the ERT standard of EDANA (Europe is with promptly abandoning product and non-weaving cloth association), that is:
A) ThicknessTest:
Sample is prepared 24 hours, and the environment temperature of test is 23 ℃, and relative humidity is 50%.The thickness of this nonwoven fabric is determined by the distance between witness mark disk and the parallel with it pressure disk, wherein place this nonwoven fabric on the reference disk, and this pressure disk applies the pressure of an accurate numerical value to tested surface.This device comprises the disk that is fixed on two horizontal positioned on the framework.Top disk vertically moves.Its area is about 2500mm 2This is with reference to the flat bottom surface diameter of the disk big at least 50mm of diameter than top disk.
The width of specimen and length dimension are respectively 180x80mm scholar 5mm.One measurement mechanism is provided, when apply 0.02kPa pressure make two dishes closely near the time with the distance between two disks of this measurement mechanism measurement.
B) At machine direction and horizontal direction intensity and degree of drawing:
Sample is prepared 24 hours, and the environment temperature of test is 23 ℃, and relative humidity is 50%.This method of testing is used cupping machine, and this cupping machine is made up of one group of fixing anchor clamps and one group of anchor clamps that move, and wherein mobile anchor clamps are at the uniform velocity mobile.The effective width of the anchor clamps of this cupping machine is 50mm.This cupping machine is equipped with a recorder, and the tension curve as the stretching function drawn out in this recorder record.From nonwoven fabric intercepting width is 50mm ± 0.5mm, and length is 5 samples of 250mm, and direction is machine direction and horizontal direction.Test this five samples successively, test, and the primary clearance between anchor clamps is 200mm with the even draw speed of 100m/min.The tension curve of the function that the conduct of this cupping machine record stretches is to be unit with newton, thereby determines the maximum of curve.
C) The weight of every square metre of fabric:
Sample is prepared 24 hours, and the environment temperature of test is 23 ℃, and relative humidity is 50%.Be at least 50000mm with at least three areas of cutter sweep cutting that are called the crush-cutting machine 2Sample.Each part sample is weighed with the laboratory balance, and this balance has 0.1% precision of the quality that claimed sample.
D) Density:
Density calculates by the quality of measured thickness and every square metre:
d＝g/(tx100)
Wherein, d=density, unit is every cubic centimetre a gram number
The quality of every square metre of nonwoven fabric of g=;
The thickness of the tested nonwoven fabric of t=(unit is mm).
Description of drawings
In the accompanying drawings, only provide embodiments of the invention:
Fig. 1 is the part plane summary view according to device of the present invention; With
Fig. 2 is complete plan view.
Specific embodiments
Device shown in Figure 1 comprises two spunbond unit 1,2, described spunbond unit has punch die 3,4 respectively, described spunbond unit will be deposited in by the fabric web that continuous filament forms conveyer belt 6 endless conveyor on be with on 5, comprise tensioning and guide roller 7, this fabric web is delivered to the right side by hold- down roller 8 and 9 from left side shown in Figure 1 then, and then through inferior ray machine 10, this Asia ray machine comprises two rollers, via conveyer belt 11, pass to water spray on jet device then.Described water spray comprises a fixing interior cylinder 12 towards jet device, at this sheathed slidably hollow circle tube device 13 or wear the sleeve pipe of micropore above cylinder 12, described hollow circle tube device 13 is made up of metal fabric, the diameter of the silk thread of metal fabric is 0.25mm, every centimetre has 22 rhizoid lines on warp direction and weft direction, micropore is of a size of 200 microns on the described sleeve pipe of wearing micropore, and every square centimeter has 100 holes.The thickness of metal fabric is 0.50mm, is SATIN AND SATEEN CLOTH.This fabric web is passed metal fabric 13, and accepts the injection of 100 microns water sprays of diameter under the pressure of 300 crust via nozzle 14.
Fig. 2 shows the longitudinal axis YY ' of die head 3 and the longitudinal axis Z Z ' of die head 4 tilts with angle a and angle b with respect to axis X X ' respectively, and axis X X ' and machine direction are on a line, but direction is opposite.Fig. 2 is illustrated in water spray after jet device, provides dewatering conveyer 15, drying oven 16 and wrapping machine 17.
Embodiment:
The material that from 1 to 10 all embodiment use all is the 20g/m of the PERFOBOND device fabrication of being sold by Rieter (Rieter Perfojet) company 2Spun-bonded non-woven fabrics, be that the polypropylene filament of 1.7dtex is formed by fiber number.The ratio that this nonwoven fabric has machine direction intensity and horizontal direction intensity is lower than 1.5 feature, and this makes it in a lot of the application remarkable advantages be arranged.The thickness of this nonwoven fabric is 0.15mm, and the intensity of machine direction is 39.8N/50mm, and the intensity of horizontal direction is 32.1N/50mm, and density is 0.133g/cm 3
Through after the hot calendered, this nonwoven fabric is handled through the water spray on the JETLACE equipment, and this equipment is sold by Rieter Perfojet, and this equipment comprises a hollow cylindrical cylinder, a plurality of covers or cylinder-shaped device is arranged in its outside rotation.On the surface of the cylinder-shaped device of these rotations, filament is accepted the processing of water jet just.The nozzle of water spray is installed in the exterior circumferential of cylinder, and the water spray of nozzle guide is aimed at this cylinder-shaped device.
It is 120 microns water spray that this water jet system provides diameter, is spaced apart 0.6mm between the water spray.In this hollow circular cylinder, apply the vacuum of 800mbar by vacuum generator.
All tests are carried out under the linear speed of 200m/min.All specimen are carried out predryingly having earlier on the conveyer belt of suction socket, dry in draft furnace under 100 ℃ temperature then, at last it are twined.
Embodiment 1:(reference example)
Used cylinder is equipped with a cylinder-shaped device C1, and this device is made up of the stainless steel of perforation, and covering one deck copper fabric on the stainless steel of this perforation, this fabric are that the silk thread of 0.63mm and silk thread that the weft direction diameter is 0.51mm constitute by the warp direction diameter.This fabric comprises every centimetre of 9.5 warps and every centimetre of 8.5 parallels.
The pressure of injector be 100 the crust, the thickness of this nonwoven fabric has increased, but its surface have a lot of areas from 0.4 to 0.5mm 2The hole.Its feel ratio does not have treated nonwoven fabric soft, but makes it not use owing to have perforation.
Embodiment 2:
Used cylinder is equipped with a cylinder-shaped device C2, this device is made up of the stainless steel of perforation, cover one deck stainless steel metal fabric on the stainless steel of this perforation, this metal fabric is that diameter is that the silk thread of 0.14mm is formed on 0.11mm silk thread and the warp direction by diameter on the weft direction.This fabric comprises every centimetre of 39 warps and every centimetre of 36 parallels.
Intensity index I=(39.8+32.1)/20 is 3.35, yet if do not add processing, this value is 3.59.
The pressure of injector is 170 crust.The thickness of this nonwoven fabric has increased, and its feel is more soft more than initial nonwoven fabric.There are not flaw and perforation, I=3.3.
Embodiment 3:
Under the pressure of 230 crust, repeat embodiment 2.The thickness of this nonwoven fabric has increased, and its feel is more soft more and more soft more than the nonwoven fabric feel among the embodiment 2 than initial nonwoven fabric (being the nonwoven fabric among the embodiment 1) feel.There are not flaw and perforation, I=3.16.
Embodiment 4:
Under the pressure of 300 crust, repeat embodiment 3.The thickness of this nonwoven fabric has increased, and its feel is more soft more and more soft more than the nonwoven fabric among the embodiment 3 than initial nonwoven fabric (being the nonwoven fabric among the embodiment 1).There are not flaw and perforation, I=2.67.
Embodiment 5:(preferred embodiment)
Used cylinder is equipped with a cylinder-shaped device C3, and this device is made up of the stainless steel of perforation, and covering one deck copper fabric on the stainless steel of this perforation, this fabric are that the silk thread of 0.22mm and silk thread that the weft direction diameter is 0.23mm are formed by the warp direction diameter.It comprises every centimetre of 25 warps and every centimetre of 20 parallels.
The pressure of injector is 170 crust.The thickness of this nonwoven fabric has increased, and its feel is more soft more and more soft more than the nonwoven fabric feel in embodiment 2,3 and 4 than the nonwoven fabric feel among the embodiment 1.There are not flaw and perforation, I=3.42.
Embodiment 6:(preferred embodiment)
Under the pressure of 230 crust, repeat embodiment 5.The thickness of this nonwoven fabric has increased, and its feel is more soft more and more soft more than the nonwoven fabric feel among the embodiment 5 than the nonwoven fabric feel among the embodiment 1.There are not flaw and perforation, I=3.39.
Embodiment 7:(preferred embodiment)
Under the pressure of 300 crust, repeat embodiment 6.The thickness of this nonwoven fabric has increased, and its feel is more soft more and more soft more than the nonwoven fabric feel among the embodiment 5 than the nonwoven fabric feel among the embodiment 1.There are not flaw and perforation, I=3.
Embodiment 8:
Used cylinder is equipped with a cylinder-shaped device C4, and this device is made up of the rigid cylindrical body sheet material of perforation, covers the nickel plating sleeve pipe on it, and this casing thickness is 0.35mm, and penetration hole diameter is 250 to 350 microns, and every square centimeter comprises 100 holes, hole random alignment.
The pressure of injector is 170 crust.The thickness of this nonwoven fabric has increased, and its feel is more soft more than initial nonwoven fabric feel.There are not flaw and perforation, I=3.55.
Embodiment 9:
Under the pressure of 230 crust, repeat embodiment 8.The thickness of this nonwoven fabric has increased, and its feel is more soft more and more soft more than the nonwoven fabric feel among the embodiment 8 than the nonwoven fabric feel among the embodiment 1.There are not flaw and perforation, I=3.51.
Embodiment 10:
Under the pressure of 300 crust, repeat embodiment 8.The thickness of this nonwoven fabric has increased, and it is soft more and than the nonwoven fabric feel among the embodiment 9 soft (still, it does not have the nonwoven fabric softness among the embodiment 7) more that its feel is compared initial nonwoven fabric feel.There are not flaw and perforation, I=3.21.
Embodiment 1 to 10 the results are shown in the following table:
This table shows that obtaining thickness increases about 50% to surpassing 100%, still have the density of nonwoven fabric in the embodiment 1 simultaneously, and machine direction intensity/horizontal direction volume efficiency equates basically.
Embodiment 11:
It is 0.26 micron sodium chloride that application is suspended in particle diameter in the air, to a kind of 140g/m that is made by the polypropylene filament of 1.5dtex of the present invention 2Nonwoven fabric do filtration test.The model of this device is TSI CERTITEST 8130, and is 103I/min by the speed air flow of this sample.Obtained 77% efficient and 420x10 -5The loss of flood peak of crust.
Use same device and under same condition, will be used as the 170g/m of filter medium usually 2Product test, this product is by melting and spraying, spun-bonded non-woven fabrics, four layers of composition of the inferior fiber optics of polypropylene fibre and polypropylene.Efficient is 74%, and the loss of flood peak is 540x10 -5Crust.
Nonwoven fabric of the present invention has the higher efficient and the lower loss of flood peak, and the weight on the per unit area is lower simultaneously.Use nonwoven fabric of the present invention and have the machine intensity of 300N/50mm and the transverse strength of 300N/50mm, promptly ratio between the two is 1.1.Its thickness is 1.9mm, and density is 0.074g/cm 3, I=4.5.
Embodiment Thickness (mm) Thickness increases (%) Density (g/cm 3) MD (machine direction) intensity (N/50mm) CD (horizontal direction) intensity (N/50mm) Loss of strength MD+CD (%) Feel
Handle number 0.15 - 0.133 39.8 32.1 - -
1 0.23 53.3 0.087 37.0 30.1 4.8 -
2 3 4 0.22 0.26 0.29 46.7 73.3 93.3 0.091 0.077 0.069 36.3 35.1 29.7 29.7 28.2 23.8 5.9 8.6 18.4 + ++ +++
5 6 7 0.24 0.28 0.32 60.0 86.7 113.3 0.083 0.071 0.063 38.0 37.5 33.2 30.3 30.4 26.8 3.6 4.0 11.9 +++ ++++ +++++
8 9 10 0.26 0.29 0.32 73.3 93.3 113.3 0.077 0.069 0.063 39.1 39.3 35.0 32.0 30.8 29.2 0.8 2.8 7.7 + ++ ++
Feel is measured with a control panel.Best feel is used ++ +++represent, reduce successively.

Claims (9)

1. method of producing nonwoven fabric, in the method, the filament that comes out from the spunbond unit with die head is precipitated as the fabric web with longitudinal direction at conveyer belt, form compacted fabric web along it being compressed perpendicular to this fabric web plane, this compacted fabric web is under the pressure of 50 to 500 crust then, with diameter is that 50 to 250 microns water jet dashes to penetrate and makes it fastening, it is characterized in that:
-with at least one spunbond unit described fabric web being deposited on the conveyer belt, the die head on the wherein spunbond unit tilts with respect to longitudinal direction, and wherein their die head tilts with 10 ° to 60 ° directions with respect to longitudinal direction;
-water jet dashes and penetrates, perhaps fabric web is inserted on the metal fabric, the diameter of this metal fabric fine rule is between the 0.10mm to 0.30mm, there are 40 at the most with every centimetre in this fabric, with every centimetre 40 parallels are arranged at the most, perhaps fabric web is inserted in the sleeve pipe of wearing micropore, the size in hole is between 50 to 600 microns on the sleeve pipe, and the quantity of micropore is 50 to 200 every square centimeter.
2. the method described in claim 1 is characterized in that described spunbond unit preferably has at least two spunbond unit.
3. the method described in claim 1 is characterized in that described die head preferably tilts with 20 ° to 50 ° directions with respect to longitudinal direction.
4. the method described in claim 1 or 2 is characterized in that described die head is opposite with respect to the incline direction of the preferred die head of longitudinal direction.
5. the method described in claim 1, the thickness that it is characterized in that described metal fabric is between 0.40 to 0.75mm.
6. the method described in claim 1 is characterized in that the diameter of described metal fabric fine rule is preferably between 0.18 to 0.30mm.
7. the method described in claim 1 is characterized in that every centimetre in described this fabric preferably has 15 to 30 warps and preferred 15 to 30 parallels.
8. the method described in claim 1, the size that it is characterized in that micropore on the described sleeve pipe is preferably between 150 to 500 microns.
9. the method described in claim 1 is characterized in that described metal fabric has the plane, twill or satin weave.
CNA2008101260231A 2002-10-18 2003-10-07 Low-density nonwoven fabric and production method and installation therefor and uses Pending CN101343817A (en)

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CN102431229B (en) * 2011-09-08 2014-04-30 浙江弘扬无纺新材料有限公司 Non-woven with online added warp and weft yarn and production method thereof
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WO2004038081A1 (en) 2004-05-06
FR2846013B1 (en) 2005-05-27
EP1556535A1 (en) 2005-07-27
AU2003286219A1 (en) 2004-05-13
US20060014464A1 (en) 2006-01-19

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