CN115652536A - High-strength water-punched composite material for colorful soft towel and preparation method thereof - Google Patents

Abstract

The invention discloses a high-strength colored soft towel spunlaced composite material and a preparation method thereof. The material comprises a carded web upper layer, a spunbonded middle layer, and a carded web lower layer arranged overlappingly; the carded web layer and the carded web The lower layer is made of mixed and carded colored hydrophilic fibers and conventional fibers; the spun-bonded middle layer is made of hot-rolled side-by-side bi-component fibers. The beneficial effects of the present invention are: the color of the spunlace composite material is derived from PVA fiber, which avoids the subsequent dyeing operation of the spunlace composite material, avoids the application of dyeing additives, solves the problem of poor color fastness, and the dyeing agent The environmental pollution problem caused by the high-strength colored soft towel is reinforced by the carded layer of the spunlace composite material and the spunbonded intermediate layer, and the fibers in the carded layer and the fibers in the spunbond material are displaced, interspersed, and entangled. Knotting and cohesion, so that the carded layer and the spunbond layer are firmly combined, so that the material has high strength and stable structure.

Description

A high-strength colored soft towel spunlaced composite material and its preparation method

technical field

The invention belongs to the technical field of spunlace nonwoven fabrics, and in particular relates to a spunlace composite material for high-strength colored soft towels and a preparation method thereof.

Background technique

In recent years, with the improvement of people's living standards, people's requirements for the quality of life are getting higher and higher. Soft towels and wet wipes have become a commonly used item in people's lives, and their share in the daily necessities market is also increasing. big. Spunlaced non-woven materials have the advantages of high strength, soft hand feeling, good drape, good hygroscopicity, smooth appearance, not easy to fluff, not easy to be infected with bacteria, and do not contain chemical adhesives. They are widely used in the field of hygienic materials and are developing rapidly in recent years. One of the advanced nonwoven material production technologies.

Spunlaced non-woven soft wipes have a good hand feeling and will not cause harm to human skin. They are the main materials for soft wipes on the market. However, as people become more and more aware of environmental protection, hygiene and protection of physical health, they also put forward stricter requirements for soft wipes. For example, the materials of soft wipes on the market are mostly plain, and the products have no differentiation. , and the spunlace material is prone to deformation during use. At present, there are also some patents reporting new technologies for the development of spunlace soft towels. For example, patent CN114318719A discloses a preparation method of wood pulp composite spunlace nonwoven fabric, which has excellent color fastness, resistance to dry and wet grinding and solvent resistance. Advantages, but the preparation process is relatively complicated, and the required cost is high. Patent CN216338281U discloses a kind of hemp fiber spunlace non-woven fabric, which adopts hemp fiber as the wiping surface layer, which effectively improves the decontamination ability and wear resistance, but the color of the prepared non-woven fabric is the original color of hemp fiber, and the color is not bright , can not meet people's demand for differentiated products in the market. Therefore, the development of a differentiated structurally stable spunlaced nonwoven material for the preparation of soft towel products has a good market potential.

Contents of the invention

The object of the present invention is to provide a structurally stable, high-strength colored soft towel spunlace composite material and its preparation method.

For realizing above-mentioned object of the present invention, the present invention adopts following technical scheme:

A high-strength colored soft towel hydroentangled composite material, including a carded web layer, a spunbonded middle layer, and a carded web lower layer arranged overlappingly;

The upper layer of the carded net and the lower layer of the carded net are formed by mixing and carding colored hydrophilic fibers and conventional fibers;

The spunbond middle layer is hot-rolled from side-by-side bicomponent fibers.

The high-strength colored soft towel spunlace composite material described in this application uses colored hydrophilic fibers to avoid the application of subsequent color additives for spunlace materials, reduce environmental pollution, and the problems of poor color fastness. In addition, the excellent hydrophilic properties of the colored hydrophilic fibers endow the composites with superabsorbent properties.

After the carded web layer and the spunbond material are spunlace reinforced, the fibers in the fiber web and the fibers in the spunbond material are displaced, interspersed, entangled, and entangled, so that the carded web layer and the spunbond layer are firmly combined, and the material It has high strength and stable structure.

The spunbonded layer used in the composite material described in this application is a side-by-side bi-component fiber. After heat treatment, the low-melting point component and the high-melting point component shrink to different degrees to form a spiral crimped structure, and the spunlace material is better after reinforcement. Fluffy, feel and breathability.

As a preferred embodiment of the above-mentioned high-strength colored soft towel spunlaced composite material, the weight of the fiber webs of the carded net layer and the carded net lower layer are both 40-200 g/m ² , and the thickness is Both are 5-20mm; fiber diameters are all 15-30μm;

The diameter of the spun-bonded middle layer fiber is 10-30 μm, the weight of the spun-bonded middle layer fiber is 20-80 g/m ² , and the thickness is 2-10 mm.

The above-mentioned high-strength colored soft towel spunlace composite material, as a preferred embodiment,

The carded net layer is made of the following raw materials in mass percentage: 20%-80% of colored hydrophilic fibers, 20%-80% of conventional fibers;

The colored hydrophilic fiber is a PVA fiber;

The conventional fiber is at least one of viscose, PP fiber, PLA fiber, PET fiber or cotton fiber;

The materials of the carded upper layer and the lower layer of the carded net are the same;

The spun-bonded middle layer is side-by-side bicomponent fibers, including PP fiber/PE fiber, PP fiber/PET fiber or PA fiber/PP fiber.

PVA fiber is the abbreviation of polyvinyl alcohol fiber. It is a synthetic fiber processed from high-quality polyvinyl alcohol (PVA) with a high degree of polymerization. PVA fiber has high strength, high modulus, low elongation, wear resistance, acid and alkali resistance, and good weather resistance. It has good affinity and bonding with cement, gypsum and other substrates, and is non-toxic, non-polluting, and does not damage human skin. , harmless to the human body, is one of the new generation of high-tech green building materials.

Viscose fiber, referred to as viscose fiber, is a kind of man-made fiber. Viscose fiber has good hygroscopicity. Under normal atmospheric conditions, the moisture regain is about 13%. The fabric is soft, smooth, and has good air permeability. Bright color, good color fastness.

PP fiber is the abbreviation of polypropylene fiber, which has the advantages of light weight, high strength, good elasticity, wear resistance and corrosion resistance, and has good heat resistance and aging resistance.

PLA fiber generally refers to corn fiber, which is a synthetic fiber made from starch such as corn and wheat, which is fermented into lactic acid and then polymerized and spun. Corn fiber is a lactic acid polymer synthesized from lactic acid contained in the human body, which is absolutely safe for the human body. Corn fiber has superior performance, excellent drapability, smoothness, moisture absorption and air permeability, natural antibacterial and reassuring weak acidity for the skin, good heat resistance and anti-ultraviolet function, and is full of luster and elasticity.

PET fiber refers to polyester fiber, which is a synthetic fiber obtained by spinning polyester formed by polycondensation of organic dibasic acid and dibasic alcohol, and belongs to polymer compounds. The biggest advantage of polyester fiber is that it has good wrinkle resistance and shape retention, and has high strength and elastic recovery ability. It is strong and durable, anti-wrinkle and non-ironing, and non-sticky.

Cotton fiber is a seed fiber formed by elongating and thickening the epidermal cells of fertilized ovules. It is different from ordinary bast fibers, and its main component is cellulose. Cotton fiber has high strength, good air permeability, poor wrinkle resistance, and poor stretchability; good heat resistance, second only to hemp; poor acid resistance, and dilute alkali resistance at room temperature; good affinity for dyes, easy to dye , the color spectrum is complete, and the color is relatively bright.

PE fiber is the abbreviation of ultra-high molecular weight polyethylene fiber. PE fiber has high toughness, corrosion resistance and UV protection.

PA fiber is the abbreviation of polyamide fiber. High mechanical strength, good toughness, high tensile and compressive strength.

The second aspect of the present application provides a method for preparing a high-strength colored soft towel spunlace composite material, comprising the following steps:

(1) Prepare the carded web layer: use colored hydrophilic fibers and conventional fibers as raw materials to form a web through a roller carding machine;

(2) Preparation of spunbond middle layer: Two-component spinning is carried out through parallel two-component spunbond equipment, and two-component raw material masterbatches are respectively put into two screw extruders for melt extrusion and filtered, metered, Spinning, fine-flow drafting, laying on the forming net to form a network structure, the two formed network structures are hot-rolled and bonded for reinforcement, and the reinforced material is heat-treated in an oven to obtain a two-component spunbond intermediate with a spiral crimp structure layer;

(3) Spunlace composite reinforcement: The carded net layer obtained in step (1), the spunbond intermediate layer obtained in step (2), and the carded net layer obtained in step (1) are stacked on the hydroentangled web curtain from bottom to top On the other hand, it is reinforced by spunlace equipment, so that the fiber layers are interspersed with each other, entangled and combined into one;

(4) Drying and finishing: the spunlace composite material is obtained by extruding the spunlaced material to remove moisture, and then drying and coiling.

The above-mentioned method for preparing a high-strength colored soft towel spunlace composite material, as a preferred embodiment, in step (1), the length of the colored hydrophilic fiber is 38mm or 53mm, and the length of the colored hydrophilic fiber 15-30μm in diameter;

The length of the conventional fiber is 38 mm or 53 mm, and the diameter of the conventional fiber is 15-30 μm.

As a preferred embodiment of the above-mentioned method for preparing a high-strength colored soft towel spunlaced composite material, in step (2), the speed ratio of the metering pump during spinning of the two components is 1:1, and the hot-rolled and bonded The temperature is 100-160°C, the heat treatment temperature is 100-160°C, and the heat treatment time is 1-3min.

As a preferred embodiment of the method for preparing a high-strength colored soft towel spunlace composite material, in step (3), the spunlace pressure is 2-5 MPa, and the number of spunlace heads is 1-4. The number of spunlace passes is 1-3 for the front and back.

The above-mentioned method for preparing a high-strength colored soft towel spunlaced composite material, as a preferred embodiment, in step (4), the drying is drying in a drying room, and the drying temperature is 50°C-80°C , drying time is 1-5 min.

The beneficial effects of the present invention are:

1. The color of the high-strength colored soft towel spunlace composite material of the present invention comes from PVA fiber, which avoids the subsequent dyeing operation of the spunlace composite material, avoids the application of dyeing additives, and solves the problem of poor color fastness, and Environmental pollution problems caused by dyes.

2. After the carded layer of the high-strength colored soft towel of the present invention is reinforced with the spunbonded intermediate layer of the spunlace composite material, the fibers in the carded layer and the fibers in the spunbond material are displaced, interspersed, entangled, Cohesion, so that the carded layer and the spunbonded layer are firmly combined, so that the material has high strength and stable structure.

3. The spunbond material used in the high-strength colored soft towel spunlace composite material of the present invention is a side-by-side two-component fiber, and the low-melting point component and the high-melting point component shrink to different degrees after heat treatment to form a spiral crimp structure , After reinforcement, the spunlace material has better bulkiness, hand feeling and air permeability.

4. The preparation method of the high-strength colored soft towel spunlaced composite material of the present invention is simple and convenient for industrialization.

Detailed ways

In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other implementations obtained by persons of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

The color of a high-strength colored soft towel spunlaced composite material in the present invention comes from the raw material itself, and no dyeing is required in the later stage, and the fiber and spunbond material in the carded web layer and the spunbond intermediate layer are reinforced after being carded into the web layer The fibers in the fiber are displaced, interspersed, entangled, and entangled, so that the carded layer and the spunbond layer are firmly combined, so that the material has high strength and stable structure.

Example 1

The high-strength colored soft towel described in Example 1 is a hydroentangled composite material, which comprises a carded web layer, a spunbond middle layer, and a carded web lower layer, and is formed by stacking and hydroentangled reinforcement of three layers of materials.

The upper layer of the carded web and the lower layer of the carded web are both formed by mixing and carding colored hydrophilic fibers and conventional fibers; the spun-bonded middle layer is formed by hot rolling of side-by-side bi-component fibers;

The weight of the fiber web carded into the upper layer and the lower layer of the carded web is 40 g/m ² , and the thickness is 5 mm. The colored hydrophilic fiber used is PVA fiber, and the proportion of PVA fiber to the mixed fiber is 20%. Conventional The fiber is PP fiber, and the mass of PP fiber accounts for 80% of the mixed fiber;

The spun-bonded middle layer is made of side-by-side bi-component fibers hot-rolled and reinforced, PP fiber/PET fiber (the ratio of PP fiber to PET fiber is 1:1), the fiber diameter of the spun-bonded middle layer is 15 μm, and the weight is 20 g /m ² , with a thickness of 2 mm. The fibers of the spunbonded middle layer have a helical crimp structure, and the number of crimps in the natural state is 1/cm.

The preparation method of a kind of high-strength colored soft towel spunlaced composite material described in embodiment 1 comprises the following steps:

(1) Preparation of the carded web layer: the colored hydrophilic PVA fiber and conventional PP fiber were used as raw materials to be carded into a web by a roller carding machine. The length of the colored hydrophilic PVA fiber was 38 mm, the fiber diameter was 15 μm, and the length of the PP fiber was The fiber diameter is 38 mm, the fiber diameter is 18 μm, the proportion of PVA fiber mass to the mixed fiber is 20%, and the proportion of PP fiber mass to the mixed fiber is 80%. The web (the fiber weight of the carded web layer is 40 g/m ² , the thickness is 5 mm, and the fiber diameter is 15 μm) is used as the carded web layer and the carded web lower layer of the spunlace composite material;

(2) Preparation of spun-bonded middle layer: Two-component spinning is carried out through parallel two-component spunbond equipment, and PP fiber and PET fiber masterbatch are respectively put into two screw extruders for melt extrusion and filtered, Metering, spinning, and fine-flow drafting. The speed ratio of the metering pump is 1:1 when the two components are spinning. The filaments are laid on the forming net to form a network structure, and then hot-rolled and bonded for reinforcement. The hot-rolled bonding temperature is 150°C, and finally heat-treat the reinforced material in an oven at a temperature of 155°C for 1 minute to obtain a two-component spunbonded middle layer with a spiral crimp structure;

(3) Spunlace composite reinforcement: The carded net layer obtained in step (1), the spunbond intermediate layer obtained in step (2), and the carded net layer obtained in step (1) are stacked on the hydroentangled web curtain from bottom to top On top, it is reinforced by spunlace equipment, so that the fiber layers are interspersed with each other, entangled and combined into one; the spunlace pressure is 2 MPa, the number of spunlace heads is 1, and the number of spunlace passes is 1 for the front and back. ;

(4) Drying and finishing: the spunlaced material is squeezed to remove water by rollers, and then dried and coiled to make a spunlace composite material, which is dried in a drying room at a temperature of 75°C. The drying time is 2 min.

Example 2

The high-strength colored soft towel described in Example 2 is a spunlace composite material, which comprises a carded web layer, a spunbonded middle layer, and a carded web lower layer, and is formed by stacking and spunlace reinforcement of three layers of materials.

The upper layer of the carded web and the lower layer of the carded web are both formed by mixing and carding colored hydrophilic fibers and conventional fibers; the spun-bonded middle layer is formed by hot rolling of side-by-side bi-component fibers;

The weight of the fiber webs carded into the upper layer and the lower layer of the carded web is 100 g/m ² , and the thickness is 11 mm. The colored hydrophilic fibers used are PVA fibers, and the proportion of PVA fibers to the mixed fibers is 50%. The fiber is viscose fiber, and the mass of viscose fiber accounts for 50% of the mixed fiber;

The spun-bonded middle layer is made of side-by-side two-component fibers hot-rolled and reinforced, PP fiber/PA fiber (the ratio of PP fiber to PA fiber is 1:1), the fiber diameter of the spun-bonded middle layer is 20μm, and the weight is 40g/ m ² and a thickness of 4mm. The fibers of the spunbonded middle layer have a helical crimp structure, and the number of crimps in the natural state is 2/cm.

The preparation method of a kind of high-strength colored soft towel spunlace composite material described in embodiment 2 comprises the following steps:

(1) Preparation of the carded web layer: the colored hydrophilic PVA fiber and conventional viscose fiber were used as raw materials to be carded into a web by a roller carding machine. The length of the colored hydrophilic PVA fiber was 38 mm, the fiber diameter was 20 μm, and the viscose fiber The length is 38 mm, the fiber diameter is 25 μm, the proportion of PVA fiber mass to the mixed fiber is 50%, the proportion of viscose fiber mass to the mixed fiber is 50%, and the fiber feeding amount is adjusted to control the weight and thickness of the fiber web to card A good fiber web (the fiber weight of the carded web layer is 100g/m ² , the thickness is 11 mm, and the fiber diameter is 20 μm) is used as the carded web layer and the carded web lower layer of the spunlace composite material;

(2) Preparation of spunbond middle layer: Two-component spinning is carried out through parallel two-component spunbond equipment, PP fiber and PA fiber masterbatch are respectively put into two screw extruders, melt-extruded and filtered, Metering, spinning, and fine-flow drafting. The speed ratio of the metering pump is 1:1 when the two components are spinning. The filaments are laid on the forming net to form a network structure, and then hot-rolled and bonded for reinforcement. The hot-rolled bonding temperature is 155°C, and finally heat-treat the reinforced material in an oven at a temperature of 160°C for 1.5 minutes to obtain a two-component spunbonded middle layer with a spiral crimp structure;

(3) Spunlace composite reinforcement: The carded net layer obtained in step (1), the spunbond intermediate layer obtained in step (2), and the carded net layer obtained in step (1) are stacked on the hydroentangled web curtain from bottom to top Above, it is reinforced by spunlace equipment, so that the fiber layers are interspersed with each other, entangled and combined into one; the spunlace pressure is 3.5 MPa, the number of spunlace heads is 2, and the number of spunlace passes is 2 for the front and back. ;

(4) Drying and finishing: the spunlaced material is squeezed to remove water by rollers, and then dried and coiled to make a spunlace composite material, which is dried in a drying room at a temperature of 55°C. The drying time is 3 min.

Example 3

A high-strength colored soft towel spunlace composite material described in Example 3 comprises a carded web layer, a spunbonded middle layer, a carded web lower layer, and three layers of materials laminated and reinforced with spunlace.

The upper layer of the carded web and the lower layer of the carded web are both formed by mixing and carding colored hydrophilic fibers and conventional fibers; the spun-bonded middle layer is formed by hot rolling of side-by-side bi-component fibers;

The weight of the fiber webs carded into the upper layer and the lower layer of the carded web is 200 g/m ² , and the thickness is 20 mm. The colored hydrophilic fibers used are PVA fibers, and the proportion of PVA fibers to the mixed fibers is 80%. The fiber is PLA fiber, and the mass of viscose fiber accounts for 20% of the mixed fiber;

The spun-bonded middle layer is made of side-by-side two-component fibers hot-rolled and reinforced, PP fiber/PE fiber (the ratio of PP fiber to PE fiber is 1:1), the fiber diameter of the spun-bonded middle layer is 20μm, and the weight is 60g/ m ² and a thickness of 6mm. The fibers of the spunbonded middle layer have a helical crimp structure, and the number of crimps in the natural state is 4/cm.

The preparation method of a kind of high-strength colored soft towel spunlace composite material described in embodiment 3 comprises the following steps:

(1) Preparation of the carded web layer: the colored hydrophilic PVA fiber and conventional PLA fiber were used as raw materials to be carded into a web by a roller carding machine. The length of the colored hydrophilic PVA fiber was 53 mm, the fiber diameter was 25 μm, and the length of the PLA fiber was 53mm, fiber diameter 30μm, PVA fiber mass accounted for 80% of the mixed fiber, PLA fiber mass accounted for 20% of the mixed fiber, adjust the fiber feeding amount to control the weight and thickness of the fiber web, to ensure that the carded fiber web (The fiber weight of the carded web layer is 200g/m ² , the thickness is 20mm, and the fiber diameter is 30μm) as the carded web layer and the carded web lower layer of the spunlace composite material;

(2) Preparation of spunbond middle layer: Two-component spinning is carried out through parallel two-component spunbond equipment, and PP fiber and PE fiber masterbatch are respectively put into two screw extruders for melt extrusion and filtered, Metering, spinning, and fine-flow drafting. The speed ratio of the metering pump is 1:1 when the two components are spinning. The filaments are laid on the forming net to form a network structure, and then hot-rolled and bonded for reinforcement. The hot-rolled bonding temperature is 115°C, and finally heat-treat the reinforced material in an oven at a temperature of 110°C for 2.5 minutes to obtain a two-component spunbonded middle layer with a spiral crimp structure;

(3) Spunlace composite reinforcement: The carded net layer obtained in step (1), the spunbond intermediate layer obtained in step (2), and the carded net layer obtained in step (1) are stacked on the hydroentangled web curtain from bottom to top On the surface, it is reinforced by spunlace equipment, so that the fiber layers are interspersed with each other, entangled and combined into one; the spunlace pressure is 5 MPa, the number of spunlace heads is 3, and the number of spunlace passes is 3 for each front and back ;

(4) Drying and finishing: the spunlaced material is squeezed to remove water by rollers, and then dried and coiled to make a spunlace composite material, which is dried in a drying room at a temperature of 55°C. The drying time is 5 min.

Comparative example 1

The difference between a high-strength colored soft towel spunlaced composite material described in Comparative Example 1 and a high-strength colored soft towel spunlaced composite material described in Example 1 is that the carded net layer described in Comparative Example 1 and the The lower layer of the carded net is a colored hydrophilic PVA fiber layer, and all the other materials and preparation methods are the same as in Example 1.

Comparative example 2

The difference between the high-strength colored soft towel spunlace composite material described in Comparative Example 2 and the high-strength colored soft towel spunlace composite material described in Example 1 is that the composite material described in Comparative Example 2 does not contain spunbond intermediates. layer. All the other materials and preparation method are the same as in Example 1.

The performance research of a high-strength colored soft towel spunlaced composite material described in this application, the research results are shown in Table 1:

Table 1

Transverse breaking strength/N Longitudinal breaking strength/N Water absorption/100% Air permeability/mm/s Example 1 125 238 5.8 890 Example 2 212 380 8.6 735 Example 3 256 549 10.2 680 Comparative example 1 113 218 6.4 635 Comparative example 2 98 176 4.5 589

It can be seen from Table 1 that the high-strength colored soft towel spunlaced composite material described in this application has better breaking strength, and the water absorption rate and air permeability are better than the composite materials described in Comparative Example 1 and Comparative Example 2.

And the breaking strength and gas permeability of Comparative Example 1 are all lower than the composite material described in this application;

But can find out from table 1 data, embodiment 1 compares with comparative example 1, the water absorption of pure PVA fiber net can be slightly better, but comparative example 1 compares with embodiment 2,3, and water absorption is obviously on the low side, However, during the experiment, pure PVA is not suitable for combing, the uniformity is poor, and the material strength is lower than that of implementation 1, so the composite setting is easier to improve the comprehensive characteristics of the material.

The composite material described in Comparative Example 2 does not contain an intermediate spunbond layer, and its breaking strength, water absorption rate and air permeability are all lower than those of the composite material described in the present application.

Moreover, according to the data comparison of Examples 1-3, it can be found that the proportion of hydrophilic PVA fiber is higher, the water absorption is good, and the strength is high; the weight is heavy, the strength is high, but the air permeability is not significantly reduced.

And combined with the comparison of the data of Example 1 and Example 3, the longitudinal fracture strength is obviously increased.

At the same time, compared with Comparative Example 1 and Comparative Example 2, this solution has significantly improved air permeability, and has excellent air permeability while ensuring the strength of the material.

In summary, the color of the high-strength colored soft towel spunlace composite material of the present invention comes from PVA fibers, which avoids the subsequent dyeing operation of the spunlace composite material, avoids the application of dyeing additives, and solves the problem of poor color fastness. problems, and the environmental pollution problems caused by dyes.

After the carded layer of the high-strength colored soft towel of the present invention is reinforced with the spunbonded intermediate layer of the spunlace composite material, the fibers in the carded layer and the fibers in the spunbonded material are displaced, interspersed, entangled, and entangled. Thus, the carded layer and the spunbonded layer are firmly combined, so that the material has high strength and stable structure.

The spunbond material used in the high-strength colored soft towel spunlaced composite material of the present invention is a side-by-side bicomponent fiber, and the low-melting-point component and the high-melting-point component shrink to different degrees after heat treatment to form a spiral crimped structure and strengthen In the future, the spunlace material will be given better bulkiness, hand feeling and air permeability.

The above descriptions are only preferred embodiments of the present application, and are not intended to limit the present application. For those skilled in the art, there may be various modifications and changes in the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application shall be included within the protection scope of this application.

Claims (8)

1. The high-strength water-punched composite material for the color soft towel is characterized by comprising an upper carded web layer, a middle spunbonded web layer and a lower carded web layer which are arranged in an overlapping manner;

the upper carded web layer and the lower carded web layer are respectively formed by mixing and carding colored hydrophilic fibers and conventional fibers;

the spunbond middle layer is hot rolled from side-by-side bicomponent fibers.

2. The hydroentangled composite for a high-strength color soft tissue according to claim 1, wherein the grammage of the web of the carded upper web layer and the carded lower web layer is 40 to 200g/m ² The thickness is 5-20mm; the diameters of the fibers are 15-30 μm;

the diameter of the spunbonded intermediate layer fiber is 10-30 mu m, and the gram weight of the spunbonded intermediate layer fiber is 20-80 g/m ² The thickness is 2-10mm.

3. The high-strength water-punched composite material for the color soft towel as claimed in claim 1, wherein the carded upper net layer is prepared from the following raw materials in percentage by mass: 20-80% of colored hydrophilic fiber and 20-80% of conventional fiber;

the colored hydrophilic fibers are PVA fibers;

the conventional fiber is at least one of viscose fiber, PP fiber, PLA fiber, PET fiber or cotton fiber;

the upper layer of the carded web and the lower layer of the carded web are made of the same material;

the spunbond middle layer is side-by-side bicomponent fibers including PP/PE, PP/PET or PA/PP fibers.

4. A method for preparing a high-strength hydroentangled composite for a color soft towel according to any one of claims 1 to 3, comprising the steps of:

(1) Preparing a carded web layer: taking color hydrophilic fiber and conventional fiber as raw materials, and carding the raw materials into a net by a roller type carding machine;

(2) Preparation of the spunbond intermediate layer: carrying out double-component spinning by using parallel double-component spun-bonded equipment, respectively putting the master batches of the double-component raw materials into two screw extruders, carrying out melt extrusion, filtering, metering, spinning and fine flow drafting, laying the master batches on a forming net to form a net-shaped structure, carrying out hot rolling bonding reinforcement on the two formed net-shaped structures, and carrying out heat treatment on a reinforced material oven to obtain a double-component spun-bonded middle layer with a spiral crimp structure;

(3) And (3) spunlace composite reinforcement: overlapping the carded web layer obtained in the step (1), the spun-bonded middle layer obtained in the step (2) and the carded web layer obtained in the step (1) on a spunlace web supporting curtain from bottom to top, and reinforcing the spun-bonded middle layer and the carded web layer by spunlace equipment to enable the fiber layers to be mutually interpenetrated and intertwined to be combined into a whole;

(4) Drying and finishing: and extruding the spunlaced material by a roller to remove water, drying and coiling to obtain the spunlaced composite material.

5. The method for preparing the high-strength water-punched composite material for the colored soft towel according to claim 4, wherein in the step (1), the length of the colored hydrophilic fiber is 38mm or 53mm, and the diameter of the colored hydrophilic fiber is 15-30 μm;

the length of the conventional fiber is 38mm or 53mm, and the diameter of the conventional fiber is 15-30 μm.

6. The method for preparing a high-strength water-punched composite material for color soft towels as claimed in claim 4, wherein in the step (2), the rotation speed ratio of a metering pump during spinning of the two components is 1:1, the temperature for hot rolling bonding is 100-160 ℃, the temperature for heat treatment is 100-160 ℃, and the time for heat treatment is 1-3min.

7. The method for preparing the water-jet punching composite material for the high-strength color soft towel according to claim 4, wherein in the step (3), the water-jet punching pressure is 2-5 MPa, the number of water-jet punching heads is 1-4, and the number of water-jet punching channels is 1-3 respectively.

8. The method for preparing the water-punched composite material for the high-strength color soft towel according to claim 4, wherein in the step (4), the drying is carried out by adopting a drying room, the drying temperature is 50-80 ℃, and the drying time is 1-5 min.