CN1223729C - Manufacturing method of superfine fiber non-woven composite reinforced artificial leather material - Google Patents

Abstract

A method for manufacturing an artificial leather material reinforced by a superfine fiber non-woven fabric, mainly comprising: using superfine fibers arranged in an island-like fiber section as the main raw material of the non-woven fabric, and using polyester, polyamide, or polyolefin materials, and forming a loose thin layer reinforcement material with gaps by spunbonding, meltblowing, hot pressing, or by processing the silk through a loom or a knitting machine, and then entangled and combined the superfine fibers with the thin layer reinforcement material by needle rolling or water needle rolling to form a superfine fiber non-woven fabric after composite reinforcement, and then impregnating or coating the fabric with an elastomer resin composition, and then forming an artificial leather semi-finished product after solidification, washing, drying, and reduction, and then performing release paper transfer processing, or performing veneer processing, or embossing processing to obtain an artificial leather material with genuine leather texture, or performing grinding and dyeing processing on the artificial leather semi-finished product to obtain an artificial leather material imitating deerskin. The problem of the difference in longitudinal and transverse elongation can be solved, and the artificial leather is suitable for making artificial leather.

Description

Instructions Manufacturing method of artificial leather material reinforced by microfiber non-woven composite

technical field

The invention relates to a manufacturing method of an artificial leather material, in particular to a manufacturing method of a superfine fiber non-woven composite reinforced artificial leather material.

Background technique

At present, the general microfiber artificial leather is mostly spun by composite spinning, and its fineness cannot be lower than 0.015 denier (Denier), so that when it is used on the surface of the leather, it is impossible to obtain the delicate fluffy feeling like buckskin. Another example is the traditional microfiber artificial leather made by the mixed spinning method. Although the surface has a fine fluffy feeling like buckskin, the leather strength is very poor.

Referring to Fig. 1, it is known that microfibers are made of artificial leather by impregnating polyurethane (polyurethane, hereinafter referred to as PU) resin composition, wherein the microfibers used, for example: China Taiwan Patent Announcement No. 152961 No. case (Application No. 78107985) is titled "Composite ultra-fine fiber non-fabric similar to leather". , needle rolling, impregnated with resin and impregnated with PU resin, coagulated, washed with water and dried. One of the components in the composite ultrafine fiber is washed away with a solvent, and then it is ground and composited with ultrafine fiber non-woven fabric and post-processing. Its main flaws are:

1. This kind of traditional microfiber substrate non-woven fabric is not suitable for artificial fabrics because of its large difference in elongation in the longitudinal and transverse directions, especially the high elongation in the transverse direction. leather.

2. Generally, the superfine fiber non-woven fabrics rolled by water needles have obvious water needle marks on the surface of the non-fabric, and the interlayer peeling strength is not high, so it is not suitable for artificial leather. Fibers obtained by composite spinning, ultrafine fibers formed therefrom, and various production methods thereof are known techniques. The fibers obtained by composite spinning are generally synthesized by extruding at least two compatible fiber polymers, so that one of the selected polymers for forming fibers is dissolved to form microfibers.

In addition, traditional artificial leather reinforced by braids is a known technology. For example, in Japanese Patent Publication No. 4-1113, it is disclosed that braided fabrics made of strong twisted yarns with a twist number of 1000 T/m or more are used as reinforcing materials. Technology. This technology uses needle crimping to integrate short-fiber cotton non-woven fabrics and reinforcing fabrics, and aims to minimize damage to the reinforcing fabrics caused by needle crimping, and proposes high-strength and soft artificial leather. method. The short-fiber cotton non-woven fabric and the reinforcing fabric layer are synthesized and integrated by needle rolling, and after a little shrinkage is applied, the polyvinyl alcohol is impregnated, and then a part of the main fiber is extracted and removed, and then impregnated with an elastic resin to obtain artificial leather. Its main advantages and disadvantages are:

1. Since the purpose is to manufacture a reinforced fabric with a high cutting strength integrated with the microfiber non-woven warp, and has a soft structure, the strength value of the artificial leather when cut is relatively high. If compared with only the fiber Compared with the state of non-woven fabric, the deformability of artificial leather is definitely lower due to the effect of the reinforcing material, but even so, the deformability in the range of 10% is quite high. That is to say, in the aforementioned technology, although the damage generated by the reinforcing fabric during needle rolling can be suppressed, and the high strength of the artificial leather after the entanglement can be achieved, the fiber non-woven fabric after the entanglement The apparent density is not suitable. That is to say, generally, the purpose of increasing the apparent density is to use the technique of heat-shrinking the non-fabric after entanglement. In the technical aspect of this publication, the fiber non-fabric has almost no shrinkage, so it can only be obtained by heat treatment. A slight form change process of torque release of the strongly twisted filaments constituting the reinforcing fabric. In fact, in order to increase the apparent density of the laminate of each sheet of non-woven fabric and cloth, if one of the non-woven fabric and cloth is heat-treated and shrunk, curling or wrinkling occurs on the laminated artificial leather by heat treatment, and the surface Concave-convex, etc., will cause troubles in the subsequent steps, and will reduce the grade of the product.

2. If it is made into a three-layer laminated form of non-woven/fabric-fabric, although there will be shrinkage, the degree will become very small, and the apparent density will hardly increase.

3. In the above-mentioned gazette, although it is recorded that PVA is attached, when PVA has been given, the fiber space is filled with PVA, and the space between fibers in this kind of artificial leather becomes larger, so the artificial leather produced The apparent density becomes lower, and when stretched and deformed, it also becomes an artificial leather structure that is easily deformed.

Also, in Japanese Patent Application Laid-Open No. 55-57059, a reinforcing fabric made of long fibers with potential shrinkage is disclosed, and here a papermaking made of short fibers with a fiber length of 10 mm or less is made by high-pressure water flow. After the laminate of the non-woven fabric and the reinforcing fabric is entangled to form an integrated artificial leather, the reinforcing fabric is shrunk to increase the apparent fiber density of the artificial leather. Its main advantages and disadvantages are:

1. Since it is related to the reinforcing fabric made of latent shrinkable long fibers and the papermaking non-woven fabric made of short fibers with a fiber length of 10mm or less, the fabric is interwoven with water flow, because it is a non-woven fabric for papermaking. The woven fabric has less entanglement between the constituent fibers, and the entanglement with the reinforcing fabric is also low. The elastic resin is only slightly attached, and when deformation is applied to the artificial leather, the deformation resistance of the non-woven fabric is hardly helpful, and the degree of deformation achieved by itself has to be relatively low.

2. When observing the performance of the product, due to the above method, there is also the disadvantage that the fiber is easier to fall off than artificial leather. After the entanglement of the fiber non-woven fabric is completed, when the method of laminating the reinforcing fabric on the back, if the back lamination material is selected, the deformation resistance of the artificial leather can be controlled no matter what, and then only in the non-woven state , because shrinkage treatment is possible, if a shrinkable non-woven fabric is used, although a higher apparent density can be produced, the bonding between the fiber non-woven fabric and the reinforcing fabric is weak, and it will be peeled off during processing, and it needs to be bonded. There are steps used, so there is a disadvantage of increased manufacturing costs.

In order to effectively produce high deformation resistance (that is, the difference in elongation between the longitudinal and transverse directions is small), the joint between the fiber non-woven fabric and the reinforcing fabric is used when the degree of entanglement of the fiber non-woven fabric itself is low. It is better to laminate the reinforcing fabric by means of water flow or needle rolling so that the two are mechanically entangled very firmly. In this way, by laminating the reinforcing fabric, especially by fully selecting the reinforcing fabric, the final product of artificial leather The characteristics of anti-deformation can not only be endowed, but in most process steps, the shape change of the fiber artificial leather (elongation caused by the process tension) can be suppressed, especially when the artificial leather imitating buckskin is made, the surface Fiber density is the most important factor determining the grade of the product. The key points to improve the apparent density of composite artificial leather are:

1. Through the shrinkage of fiber non-fabric, the apparent density needs to be increased;

2. It is more important to make the elongation not caused by the process tension.

However, the technology so far has not been able to produce a shape change (especially elongation caused by process tension) that can be suppressed and has a high apparent density.

Contents of the invention

The purpose of the present invention is to provide a manufacturing method of superfine fiber non-woven composite reinforced artificial leather material, by adding reinforcement material to superfine fiber non-woven, making it a composite superfine fiber non-woven, which can be used as Lightweight, high-strength, high-flexibility superfine fiber non-woven composite reinforced artificial leather material.

The use of reinforced microfiber non-woven artificial leather as a substrate can not only improve the problem of large differences in longitudinal and transverse elongation, but also make microfiber artificial leather have higher softness and physical strength. , and can make low-weight and high-strength microfiber non-woven fabrics. After impregnating the elastomer resin composition, the weight of the original microfiber artificial leather can be reduced. The elastomer resin composition impregnated in the manufacturing process can be added. A variety of colorants needed to increase the variety of color options.

The object of the present invention is achieved like this: a kind of manufacture method of the artificial leather material of superfine fiber non-fabric composite reinforcement, it is characterized in that: it arranges the cross-section of the fiber that spins out through mixed spinning method or composite spinning method into Sea-island superfine fibers, as the main raw material of non-woven fabrics, in addition choose at least one of polyester, polyamide or polyolefin, through spun-bonding, melt-blown, hot-pressing method or processed yarn through loom, knitting machine To form a loose thin-layer reinforcement with voids, the thin-layer reinforcement is entangled and combined with the thin-layer reinforcement through needle rolling or water needle rolling to form a composite-strengthened ultrafine fiber non-woven fabric, By impregnating or coating the elastic resin composition, after solidification, washing, drying and weight reduction, the artificial leather semi-finished product is formed, and the artificial leather semi-finished product is subsequently processed to make artificial leather with real leather texture; the structure of the superfine fiber is Island-in-the-sea superfine fiber, the fineness is 1-10 denier. After the superfine fibers are dissolved to remove the sea components, the fiber bundles of the island components are dispersed into superfine fibers of 0.0001-0.1 denier.

The thickness of the thin-layer reinforcing material is 0.01-1.0 mm, the weight per unit area is 10-200 g/m ² and the gap is 10-150 mesh. The subsequent processing includes coating a one-component polyurethane composition on the semi-finished artificial leather as a top coat on the release paper, and then coating a two-component polyurethane composition as an adhesive layer, applying lamination processing on the artificial leather semi-finished product to make artificial leather. The subsequent processing includes applying sandpaper to the semi-finished artificial leather to grind mercerized hairs, and dyeing to obtain superfine fiber artificial leather imitating buckskin. The thin-layer reinforcement material is entangled and combined with the thin-layer reinforcement material through needle rolling or water needle rolling to form a composite reinforced ultrafine fiber non-woven fabric, which is impregnated and directly coated with the PU resin composition. After coagulation, washing, drying and weight reduction, the artificial leather semi-finished product is formed, and the artificial leather semi-finished product is veneered or embossed or ground to make a variety of artificial leather.

Further description will be given below in conjunction with preferred embodiments and accompanying drawings.

Description of drawings

Figure 1 is a schematic diagram of the manufacturing process of the traditional method.

Fig. 2 is a schematic diagram of the manufacturing process of the present invention.

Fig. 3 is a schematic diagram of another manufacturing process of the present invention.

Detailed ways

Referring to Fig. 2-shown in Fig. 3, the manufacture method of the superfine fiber non-woven composite reinforced artificial leather material of the present invention is mainly to arrange the cross-section of the fibers spun by the mixed spinning method or the composite spinning method into a sea-island shape. Microfiber is used as the main raw material of non-woven fabrics, and other materials such as polyester or polyamide or polyolefin are used, which are processed by spunbond, meltblown, calender or processed silk warp-woven fabrics. machine, knitting machine, and form a thin-layer reinforcement with gaps and looseness. The above-mentioned thin-layer reinforcement is needle-rolled or water needle-rolled to entangle and combine the ultra-fine fiber and the thin-layer reinforcement to form an ultra-fine fiber. non-fabric. Composite reinforced superfine fiber non-fabric is impregnated or coated with elastomeric resin composition, after solidification, washing, drying, and weight reduction, it forms artificial leather semi-finished products, which are then processed as release paper on artificial leather semi-finished products, or Perform veneer processing or embossing processing to obtain artificial leather materials with genuine leather textures, or perform grinding and dyeing processing on artificial leather semi-finished products to obtain deerskin-like artificial leather materials.

The superfine fiber non-woven fabric related to the present invention, the composite reinforced artificial leather material and its preparation method, its reinforced form and process are based on polyamide (NYLON) polymers such as polyamide 6 and polyamide 66, or Polyethylene terephthalate (PET), polytrimethylene terephthalate (PPT), polybutylene terephthalate (PBT) polyester polymers, and polystyrene (PS), poly Ethylene (PE), polypropylene (PP), polymethylpentene and other polyolefins, or thermoplastic polyvinyl alcohol, water-soluble copolyester, thermoplastic polyurethane, through mixed spinning method or composite spinning method, spinning The superfine fibers whose fiber sections are arranged in the shape of sea islands are used as the main raw material of non-woven fabrics, and the structure of the microfibers is sea-island microfibers, and the denier is in the range of 1-10 denier. After the "sea component" of the superfine fiber is dissolved, the remaining fiber bundles of the "island component" can be dispersed into superfine fibers, and the fineness is in the range of 0.0001-0.1 denier.

In addition, materials such as polyester, polyamide or polyolefin are used to form voids and loose thin-layer reinforcements through spunbonding, melt blown, hot pressing, or processing silk through looms and knitting machines. 0.01-1.0mm, weight per unit area 10-200g/m ² , 10-150 mesh. The above-mentioned thin-layer reinforcing material is added in the process of non-woven needle rolling or water needle rolling, and the superfine fiber is entangled with the thin-layer reinforcing material by needle rolling or water needle rolling to form a superfine fiber non-woven fabric.

Then impregnate the reinforced superfine fiber non-fabric with elastomeric resin composition (including solvent-soluble elastomeric resin and water-soluble elastomeric resin), this elastomeric resin composition can add coloring matter according to the desired color, for example The impregnation amount of the solvent-soluble elastomer resin composition is 0.5-3.0 times the weight of the base cloth, and then the coagulation bath of 5-50% DMF is used to exchange DMF and water, wash with water at 70-100°C, and wash at 100-160°C ℃ drying temperature to form a hard leather material with elasticity, and then through the reduction process to form a semi-finished artificial leather. The artificial leather semi-finished product is processed with release paper to obtain an artificial leather material with a leather surface texture, or it is ground and dyed to obtain an artificial leather material imitating buckskin, which can also be impregnated with superfine fiber non-woven fabric , to directly cover the PU resin composition to reduce the manufacturing process, and then through the reduction process, the semi-finished artificial leather can be veneered, embossed or ground to obtain a variety of artificial leather materials.

Among them, the semi-finished artificial leather can be coated with a one-component polyurethane composition as a surface coating on the release paper, and then coated with a two-component polyurethane composition as an adhesive layer coating on the semi-finished artificial leather Apply veneer processing to obtain artificial leather materials.

The microfiber artificial leather product related to the present invention and its preparation method, wherein the microfiber non-woven fabric used can adopt the inventor's prior application No. 02140697.9 "Manufacturing method of high-density microfiber base cloth" The obtained superfine fiber base cloth has two kinds of polymers, one of which is a polymer that can be dissolved by solvent or hot water, and the other is a polymer that is partially or insoluble by solvent or hot water. , mix according to weight or volume ratio, and use fan-shaped spinnerets while adding another polymer that is not dissolved by solvent or hot water for composite spinning to obtain ultrafine fibers of two thicknesses. The polymers that can be dissolved by solvents are polystyrene (PS), polyethylene (PE), thermoplastic polyurethane (TPU), and the polymers that can be dissolved by water are thermoplastic polyvinyl alcohol (TPVA) or water-soluble copolymers. Polyester, in which water-soluble copolyester is a copolyester containing isophthalic acid (IPA), terephthalic acid (TPA), acrylic acid (AA), sodium sulfonate (SIP) or polyethylene glycol (PEG) polymer. The thermoplastic polyvinyl alcohol (TPVA) is polyvinyl alcohol obtained by hydrolyzing polyvinyl acetate (PVAc) by 70-100%, preferably 75-95%. This polyvinyl alcohol is other water-soluble polymers containing plasticizer additives, polyvinylpyrrolidone, polyethyloxazoline, and polyethylene oxide.

Polymers that are not dissolved by solvents or hot water include polyester polymers, polyamide polymers or polyolefins. The above-mentioned polyester polymer refers to polyethylene terephthalate (PET), polytrimethylene terephthalate (PPT) and polybutylene terephthalate (PBT);

Polyamide polymer refers to nylon 4 (Nylon4), nylon 6 (Nylon6), nylon 66 (Nylon66), nylon 610 (Nylon610) or nylon 11 (Nylon11);

The water-insoluble polyolefin refers to polyethylene, polypropylene, polystyrene, polyvinyl acetate, polybutene or a copolymer thereof.

The preparation method of the superfine fiber non-woven composite reinforced artificial leather material related to the present invention, wherein the weight reduction step refers to utilizing solvents such as lye, tetrachloroethylene, toluene, dimethylformamide or water to convert the previous Polymers that are not soluble in solvents or hot water (such as polyamide-based polymers, polyester-based polymers or polypropylene) mixed with solvent- or water-soluble polymers during the spinning step, After fiber separation, the fineness can reach 0.0001-0.1 denier, and the fine fluff obtained is then subjected to the grinding step, and the surface can present a very fine fluff feeling.

Generally speaking, the derivative products obtained by using microfibers have poor physical properties (such as peel strength, tensile strength or tear strength) because the surface only has quite fine short hairs, but the hairs of the present invention have short hairs. In addition to fluff, there is also long fluff, and this long fluff can reinforce the shortcomings of poor physical properties of derivative products obtained from general superfine fibers.

In the present invention, needle rolling or water needle rolling is used to make superfine fibers spun by mixing or composite spinning and materials such as polyester, polyamide or polyolefin, through spunbonding, melt blowing, hot pressing or The intertwined and loose thin-layer reinforcements formed by processing silk through looms and knitting machines are entangled to form ultra-fine fiber non-woven fabrics. This thin-layer reinforcement and ultra-fine fibers may be ultra-fine The entanglement of non-woven fabrics made of fibers, as long as the entanglement treatment can be effectively carried out by high-pressure water flow entanglement treatment or meter rolling treatment, no matter what method is available, the high-entanglement needle rolling treatment method can be used. better.

The above-mentioned superfine fiber non-woven cloth after composite strengthening is impregnated or coated with elastomer resin composition, after solidification, washing, drying, and weight reduction, it forms artificial leather semi-finished products, and then makes release paper on the artificial leather semi-finished products. , or implement veneer processing or embossing processing to obtain artificial leather materials with genuine leather textures, or perform grinding and dyeing processing on artificial leather semi-finished products to obtain deerskin-like artificial leather materials. The thus-obtained superfine fiber non-woven composite reinforced artificial leather material can solve the problem of the difference in elongation between the longitudinal direction and the transverse direction, and is suitable for use as artificial leather.

The elastomer resin composition impregnated or coated in the superfine fiber non-woven cloth after composite reinforcement can be rubber-like elastomers such as polyurethane, SBR, NBR, polyamino acid, and internal acrylate. In terms of the touch of artificial leather, plus the comprehensive consideration of various physical properties, polyurethane is the best. Although the elastomeric resin composition is suitable to be used in the form of a solution, those that can be wet-cured are slightly inferior in terms of touch, but in terms of application, polyurethane-based or acrylic-based aqueous emulsions can also be used alone or in combination.

The amount of the rubber-like elastomer resin composition to be imparted is preferably 10-25% by weight of the fibers constituting the artificial leather.

Furthermore, the surface of the obtained artificial leather on the non-fabric side of the microfiber is ground with sandpaper to make it vertical, and dyed to obtain an artificial leather material imitating buckskin. The surface is coated with resin instead of making the surface bristle. After embossing or leveling treatment, the surface is concave-convex with natural leather flavor, and artificial leather with shiny surface can be obtained. The obtained artificial leather can also be dyed or processed according to the need.

In the present invention, the superfine fibers are spun by a mixed or composite spinning method, and materials such as polyester, polyamide, or polyolefin are used in addition, and are spunbonded, melt-blown, hot-pressed, or processed by a loom or a knitting machine. And form a loose thin-layer reinforcement with gaps, and then through needle rolling or water needle rolling, the ultra-fine fiber and the thin-layer reinforcement will be entangled and combined to form a composite reinforced ultra-fine fiber non-woven fabric, impregnated or coated with The elastomeric resin composition is solidified, washed with water, dried, and reduced in weight to form a semi-finished artificial leather product, which is then applied to the semi-finished artificial leather product as a release paper for transfer processing, veneer processing, or embossing processing to obtain a The artificial leather material with real leather texture, or the artificial leather material imitating buckskin by grinding and dyeing the semi-finished artificial leather. The thus-obtained superfine fiber non-woven composite reinforced artificial leather material can solve the problem of the difference in elongation between the longitudinal direction and the transverse direction, and is suitable for use as artificial leather.

The difference between the above-mentioned Fig. 2 and Fig. 3 is that the post-processing methods are different, and a variety of artificial leather materials with different styles can be produced.

The embodiments of the present invention will be described in detail below through specific examples, however, the scope of protection of the present invention is not limited by these examples.

Example 1

Example 1 of the present invention uses polyamide 6 as the island component and polystyrene (PS) as the sea component, and performs composite spinning at a ratio of 50/50. The melting temperature of the spinneret nozzle is 280°C, and the coiling speed The undrawn yarn is 900m/min, and then stretched at a stretching temperature of 80°C. After stretching, it is dried and cut into cotton to obtain a sea-island type with a fineness of 4.0dpf and a length of 51mm. Microfiber cotton.

The island-in-the-sea superfine fiber cotton is carded into a uniform cotton web by a carding machine, and interlaced and overlapped by a piling forming machine to form a cotton web laminate, and then processed with 70 denier 100% nylon 6 yarn to weave Weaving into a thin-layer reinforcement with a thickness of 0.15mm, a weight of 35g/m ² , and a needle-rolled combination of 30mesh, and applying a needle density of 700 cycles/m ² to form a superfine fiber non-woven fabric with a composite reinforcement of 340g/m ² fabric.

Then impregnate the above-mentioned strengthened superfine fiber non-woven fabric with a coating composed of 40 points of PU composition and 60 points of dimethylformamide (DMF), and the impregnation amount of the PU resin composition is 1.8 times the weight of the base cloth, and add After the red pigment, use 25% DMF in a coagulation bath at 25°C to exchange DMF with water, wash with water at 100°C, and dry at 125°C to form a hard leather with elasticity, and then go through the reduction process , And form artificial leather semi-finished products. Apply a one-component polyurethane composition top coat on the release paper, and then apply a two-component polyurethane composition adhesive layer, and apply lamination processing to the semi-finished artificial leather , followed by ripening and release surface treatment, to obtain microfiber artificial leather products with leather texture.

The comparison of the physical properties of the microfiber artificial leather product prepared in the above-mentioned embodiment 1 and the superfine fiber artificial leather product of general veneer is shown in Table 1.

Table 1 project Artificial leather of the present invention General microfiber artificial leather Reference Standard Thickness mm 1.10 1.10 ASTM D-1777 Mass per unit area g/m ² 330 430 ASTM D-751 Elongation (longitudinal)% 79 68 ASTM D-1682 Elongation (transverse direction)% 87 119 ASTM D-1682 Cracking strength (longitudinal) kgf 10.1 9.8 ASTM D-1682 Cracking strength (transverse direction) kgf 13.5 12.5 ASTM D-1682 Bursting strength kgf/cm ² 31.3 29.6 ASTM D-751 Peel strength (transverse direction) N/cm 32 25 DIN 53273

Example 2

Have 340g/m ^Composite reinforced superfine fiber non-woven fabric formed in embodiment 1, then impregnate the superfine fiber non-woven fabric after strengthening with the coating that 40 parts of PU composition and 60 parts of dimethylformamide (DMF) form For fine fiber non-woven fabrics, after the PU resin fabric is impregnated with 1.8 times the weight of the base fabric, then use 25% DMF in a coagulation bath at 25°C to exchange DMF with water, wash with water at 100°C, and dry at 125°C Finally, an elastic hard leather material is formed, and then the artificial leather semi-finished product is formed through a reduction process, and then the artificial leather semi-finished product is subjected to grinding and dyeing processing to obtain a superfine fiber artificial leather product imitating buckskin.

Example 3

Have 340g/m ^Composite reinforced superfine fiber non-woven fabric formed in embodiment 1, then impregnate the superfine fiber non-woven fabric after strengthening with the coating that 40 parts of PU composition and 60 parts of dimethylformamide (DMF) form Fine fiber non-fabric, after the impregnation of PU resin fabric is 1.8 times the weight of the base fabric and adding blue pigment, directly cover the PU resin fabric, and then use 25% DMF in a coagulation bath at 25°C to carry out DMF and Water exchange, wash at 100°C, dry at 125°C to form a hard leather material with elasticity, and then go through a reduction process to form an artificial leather semi-finished product, and directly emboss it to form a superfine fiber with a leather texture on the surface Artificial leather products.

The method disclosed in Taiwan Patent Announcement No. 152961 "composite ultra-fine fibers similar to genuine leather for non-woven fabrics" has a denier of 0.015-0.6 denier after weight reduction; The final denier is 0.0001-0.05 denier, and it has the characteristics of light weight, high flexibility, and high object strength. The above two comparisons are shown in Table 2.

Table 2 project Superfine fiber semi-finished product of the present invention Taiwan patent application Reference Standard Thickness mm 1.0 1.0 CNS1274 Mass per unit area g/m ² 250 300 ASTM D-751 Tear strength (longitudinal) kgf 7.1 5.8 CNS1279 Tear strength (transverse direction) kgf 6.7 5.8 Tensile strength (longitudinal) kgf 42 38 CNS1278 Tensile strength (horizontal) kgf 44 36

As can be seen from Table 2, the superfine fiber artificial leather product prepared by the method of the present invention is under the same specifications as similar products of the traditional method, and the product of the present invention has the effects of light weight, high physical strength, and elongation in the longitudinal and transverse directions. , and also has the advantages of reducing and diversifying artificial leather, and is suitable for making artificial leather for gloves, clothing, shoes, chair covers, leather bags, sofas, balls and the like.

Claims (5)

1, a kind of manufacture method of the artificial leather material of superfine fiber non-fabric composite reinforcement, it is characterized in that: it is the superfine fiber that will form the superfine fiber of sea island shape through the fiber cross section that spins out by mixed spinning method or composite spinning method, As the main raw material of non-woven fabrics, at least one of polyester, polyamide or polyolefin is additionally selected to form a loose and loose fabric through spunbonding, melt blowing, hot pressing, or processed yarn through a loom or knitting machine. Thin-layer reinforced material, the thin-layer reinforced material is entangled and combined with the thin-layer reinforced material by needle rolling or water needle rolling to form a composite reinforced ultra-fine fiber non-woven fabric, which is impregnated or coated with elastic resin The composition is solidified, washed with water, dried and reduced in weight to form an artificial leather semi-finished product, and the artificial leather semi-finished product is processed into an artificial leather with genuine leather texture; The fineness is 1-10 denier; after the superfine fiber is dissolved to remove the sea component, the fiber bundles of the island component are dispersed into superfine fiber of 0.0001-0.1 denier. 2. The method for manufacturing artificial leather materials reinforced by superfine fiber non-woven composites according to claim 1, characterized in that: the thickness of the thin-layer reinforcement is 0.01-1.0mm, and the weight per unit area is 10-200g/ m ² and the gap is 10-150 mesh. 3. The manufacturing method of superfine fiber non-woven composite reinforced artificial leather material according to claim 1, characterized in that: the subsequent processing includes coating a one-liquid polyurethane composition on the semi-finished artificial leather. The product is used as a surface coating on the release paper, and then a two-component polyurethane composition is coated as an adhesive layer, and the artificial leather semi-finished product is laminated to make artificial leather. 4. The manufacturing method of the superfine fiber non-woven composite reinforced artificial leather material according to claim 1, characterized in that: the subsequent processing includes applying sandpaper to the semi-finished artificial leather to grind out the mercerized hairiness, and then dyeing, A microfiber artificial leather imitating buckskin is obtained. 5. The method for manufacturing artificial leather materials reinforced by ultrafine fiber non-woven composites according to claim 1, characterized in that: the thin-layer reinforcement is needle-rolled or water-needle-rolled, and the ultrafine fiber and thin layer are reinforced The materials are entangled and combined to form a composite reinforced superfine fiber non-woven fabric. After being impregnated and directly coated with PU resin composition, after solidification, washing, drying and weight reduction, an artificial leather semi-finished product is formed. The artificial leather semi-finished product is pasted. Surface processing or embossing processing or grinding processing to make a variety of artificial leather.