CN111926581A - Benzene reduction aqueous impregnation superfine fiber synthetic leather and processing method thereof - Google Patents
Benzene reduction aqueous impregnation superfine fiber synthetic leather and processing method thereof Download PDFInfo
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- CN111926581A CN111926581A CN202010767150.0A CN202010767150A CN111926581A CN 111926581 A CN111926581 A CN 111926581A CN 202010767150 A CN202010767150 A CN 202010767150A CN 111926581 A CN111926581 A CN 111926581A
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- 239000000835 fiber Substances 0.000 title claims abstract description 189
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 title claims abstract description 144
- 238000005470 impregnation Methods 0.000 title claims abstract description 57
- 239000002649 leather substitute Substances 0.000 title claims abstract description 50
- 238000003672 processing method Methods 0.000 title claims abstract description 30
- 230000009467 reduction Effects 0.000 title claims abstract description 13
- 239000011265 semifinished product Substances 0.000 claims abstract description 111
- 238000001035 drying Methods 0.000 claims abstract description 84
- 239000004744 fabric Substances 0.000 claims abstract description 74
- 238000007493 shaping process Methods 0.000 claims abstract description 67
- 238000009987 spinning Methods 0.000 claims abstract description 55
- 239000004745 nonwoven fabric Substances 0.000 claims abstract description 49
- 238000000034 method Methods 0.000 claims abstract description 44
- 238000004519 manufacturing process Methods 0.000 claims abstract description 43
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 34
- 229920002635 polyurethane Polymers 0.000 claims abstract description 27
- 239000004814 polyurethane Substances 0.000 claims abstract description 27
- 230000008569 process Effects 0.000 claims abstract description 26
- 239000010985 leather Substances 0.000 claims abstract description 21
- 239000002002 slurry Substances 0.000 claims abstract description 18
- 238000004898 kneading Methods 0.000 claims abstract description 17
- 238000002156 mixing Methods 0.000 claims abstract description 11
- 238000004080 punching Methods 0.000 claims abstract description 10
- 239000011347 resin Substances 0.000 claims abstract description 10
- 229920005989 resin Polymers 0.000 claims abstract description 10
- 238000010438 heat treatment Methods 0.000 claims description 85
- 238000001816 cooling Methods 0.000 claims description 56
- 238000002791 soaking Methods 0.000 claims description 10
- 241000282414 Homo sapiens Species 0.000 abstract description 10
- 230000036541 health Effects 0.000 abstract description 9
- 239000002994 raw material Substances 0.000 abstract description 6
- 238000002360 preparation method Methods 0.000 abstract description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 21
- 239000004698 Polyethylene Substances 0.000 description 20
- 229920013822 aminosilicone Polymers 0.000 description 18
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 18
- 238000009998 heat setting Methods 0.000 description 7
- 238000004064 recycling Methods 0.000 description 7
- 238000005406 washing Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 239000000047 product Substances 0.000 description 6
- 239000002904 solvent Substances 0.000 description 6
- 230000007613 environmental effect Effects 0.000 description 5
- 238000003912 environmental pollution Methods 0.000 description 5
- 230000035699 permeability Effects 0.000 description 5
- 238000001125 extrusion Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 229920000728 polyester Polymers 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000002074 melt spinning Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 241001465754 Metazoa Species 0.000 description 1
- 229920001410 Microfiber Polymers 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000003373 anti-fouling effect Effects 0.000 description 1
- 238000012993 chemical processing Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 239000002612 dispersion medium Substances 0.000 description 1
- 229920006240 drawn fiber Polymers 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 231100000206 health hazard Toxicity 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
- D06N3/0004—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using ultra-fine two-component fibres, e.g. island/sea, or ultra-fine one component fibres (< 1 denier)
-
- D—TEXTILES; PAPER
- 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
-
- 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
- D01D5/088—Cooling filaments, threads or the like, leaving the spinnerettes
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- 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
- D01D5/12—Stretch-spinning methods
-
- 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
- D01D5/28—Formation of filaments, threads, or the like while mixing different spinning solutions or melts during the spinning operation; Spinnerette packs therefor
- D01D5/30—Conjugate filaments; Spinnerette packs therefor
- D01D5/36—Matrix structure; Spinnerette packs therefor
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
- D06C7/00—Heating or cooling textile fabrics
- D06C7/02—Setting
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
- D06N3/0011—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using non-woven fabrics
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/007—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by mechanical or physical treatments
- D06N3/0077—Embossing; Pressing of the surface; Tumbling and crumbling; Cracking; Cooling; Heating, e.g. mirror finish
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0086—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique
- D06N3/0088—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique by directly applying the resin
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/12—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
- D06N3/14—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N2209/00—Properties of the materials
- D06N2209/12—Permeability or impermeability properties
- D06N2209/121—Permeability to gases, adsorption
- D06N2209/123—Breathable
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N2209/00—Properties of the materials
- D06N2209/12—Permeability or impermeability properties
- D06N2209/126—Permeability to liquids, absorption
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N2211/00—Specially adapted uses
- D06N2211/12—Decorative or sun protection articles
- D06N2211/28—Artificial leather
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
- Y02P70/62—Manufacturing or production processes characterised by the final manufactured product related technologies for production or treatment of textile or flexible materials or products thereof, including footwear
Abstract
The invention provides a processing method of benzene decrement waterborne impregnation superfine fiber synthetic leather, which comprises the steps of mixing a recycled PET slice, a PA slice and a PE slice according to a certain proportion, and preparing blended sea-island fiber through a spinning process; manufacturing superfine fiber non-woven fabric from the blended sea-island fiber through a needle punching process; shaping the superfine fiber non-woven fabric through a shaping process to obtain base cloth; impregnating the base cloth with aqueous polyurethane slurry, and drying the impregnated base cloth in an oven to obtain a semi-finished product to be split; performing fiber opening treatment on the semi-finished product to be subjected to fiber opening by using a benzene reduction method to obtain a fiber opening semi-finished product; drying, oiling and shaping the split semi-finished product, and kneading the shaped split semi-finished product; and (3) veneering the semi-finished product after the leather is kneaded with water-based resin to obtain the benzene reduced water-based impregnated superfine fiber synthetic leather. The whole preparation process of the invention adopts environment-friendly raw materials, which not only can meet the requirement of protecting the environment of human beings, but also can meet the requirement of the safety and health of human bodies.
Description
Technical Field
The invention relates to the technical field of synthetic leather, and particularly relates to benzene-reduced waterborne impregnated superfine fiber synthetic leather and a processing method thereof.
Background
The leather is animal leather which is obtained by physical and chemical processing such as unhairing, tanning and the like and is denatured and not easy to rot, the leather is formed by tightly weaving natural protein fibers in a three-dimensional space, and the surface of the leather is provided with a special grain layer which has natural grains and luster and comfortable hand feeling. Synthetic leather is a plastic product which simulates the composition and structure of natural leather and can be used as a substitute material of the natural leather, and is usually prepared by taking impregnated non-woven fabric as a net layer and a microporous polyurethane layer as a grain surface layer; the front and back surfaces of the leather are very similar to leather, have certain air permeability, are closer to natural leather than common artificial leather, and are widely used for manufacturing shoes, boots, bags, balls and the like.
The leather has serious environmental pollution in the production process, the heavy metal content is easy to exceed the standard, the manufacturing cost is high, and the leather is difficult to be accepted by the general public. With the continuous improvement of social and economic levels and the enhancement of health and safety awareness of consumers, people pay more and more attention to the problems of environmental protection and health hazard, and meanwhile advocate environmental protection, energy conservation and sustainable development.
At present, a solvent-type production system is mainly adopted in the production of polyurethane synthetic leather, and the use of a large amount of organic solvents not only pollutes the environment, but also seriously damages the health of people. With the enhancement of environmental regulations and environmental awareness of people, the environmental requirements of traditional solvent-based synthetic leather are increasingly difficult. Therefore, the utilization of recycled materials, aqueous and solvent-free synthetic leather or the development of synthetic leather in the future is one of the key driving forces.
In view of the problems of environmental pollution and damage to human health existing in the conventional solvent-based synthetic leather, the inventors of the present invention have conducted intensive studies on the problems and have developed the present invention.
Disclosure of Invention
The invention aims to solve the technical problem of providing benzene-reduced waterborne impregnated superfine fiber synthetic leather and a processing method thereof, and solves the problems of environmental pollution and damage to human health of the traditional solvent type synthetic leather.
In a first aspect:
the invention is realized by the following steps: a processing method of benzene decrement waterborne impregnation superfine fiber synthetic leather comprises the following steps:
firstly, mixing recycled PET slices, PA slices and PE slices according to a certain proportion, and preparing blended sea-island fibers by a spinning process;
manufacturing superfine fiber non-woven fabric from the blended sea-island fiber through a needle punching process;
thirdly, shaping the superfine fiber non-woven fabric through a shaping process to obtain base cloth;
soaking the base cloth in the aqueous polyurethane slurry, and drying the soaked base cloth in an oven to obtain a semi-finished product to be split;
fifthly, performing fiber opening treatment on the semi-finished product to be subjected to fiber opening by using a benzene reduction method to obtain a fiber opening semi-finished product;
sixthly, drying the fiber-opening semi-finished product, applying oil for shaping, and kneading the shaped fiber-opening semi-finished product;
and seventhly, veneering the semi-finished product after the leather is kneaded with water-based resin to obtain the benzene-reduced water-based impregnated superfine fiber synthetic leather.
Further, in the step (i), the intrinsic viscosity of the recovered PET chips is 0.45 to 0.85 dl/g.
Further, in the step (i), the weight ratio of the recycled PET chip, the PA chip, and the PE chip is 20 to 30: 20-30: 20-40.
Further, in the spinning process of the step (i), the screw of the screw extruder is provided with a plurality of heating zones.
Further, the screw of the screw extruder had 8 heating zones.
Further, the temperature of the first heating zone is 145-155 ℃, the temperature of the second heating zone is 175-185 ℃, the temperature of the third heating zone is 215-225 ℃, the temperature of the fourth heating zone is 245-255 ℃, the temperature of the fifth heating zone is 275-281 ℃, the temperature of the sixth heating zone is 285-290 ℃, the temperature of the seventh heating zone is 285-290 ℃, and the temperature of the eighth heating zone is 283-287 ℃.
Furthermore, in the spinning process of the step I, the temperature of cooling air for spinning is 16-22 ℃.
Furthermore, the humidity of the cooling air for spinning is 48-54%.
Furthermore, in the spinning process of the step I, the drafting multiple of the spinning is 3-5 times.
Further, in the third step, the shaping process comprises performing gradient heat shaping on the superfine fiber non-woven fabric by using a multi-stage oven.
Further, the multistage oven is a 7-stage oven.
Further, the temperature of the 7-stage drying oven is set to 97-103 ℃, 122-.
Further, in the third step, the shaping process further includes cooling the heat-shaped ultrafine fiber non-woven fabric by using a cooling roller.
Furthermore, the number of the cooling rollers is 3-6.
Further, the temperature of the cooling roller is 15-25 ℃.
Further, in the step (iv), when the base fabric is impregnated with the aqueous polyurethane paste, the impregnation process is three times and four times.
Further, the liquid carrying rate of impregnation is 70-90%.
Further, the impregnation time is 3 to 8 minutes.
Further, in the step (iv), the drying temperature of the impregnated base fabric is 120-.
Further, in the step (iv), the drying time of the base cloth is 15 to 20 minutes.
Further, in the step (iv), after the base cloth is dried, standing the obtained semi-finished product to be opened for 20-28 hours.
Further, in the step sixthly, drying, oiling and shaping the split semi-finished product specifically comprise: immersing the split semi-finished product into a modified amino silicone oil solution for impregnation, and drying twice by using an oven after impregnation.
Furthermore, the solubility of the modified amino silicone oil solution is 12-18 g/L.
Further, the drying temperature of the impregnated fiber-opening semi-finished product is 140-.
In a second aspect:
the invention is realized by the following steps: the benzene reduced waterborne impregnated superfine fiber synthetic leather is prepared by the processing method.
The invention has the following advantages: the whole preparation process of the invention adopts environment-friendly raw materials, not only can meet the requirement of protecting the environment of human beings, but also can meet the requirement of the safety and health of human bodies, and well solves the problems of environmental pollution and damage to the health of human bodies caused by the fact that the traditional superfine fiber synthetic leather needs a solvent DMF. Meanwhile, in order to realize the recycling of the PET slices and solve the technical problem of material recycling in the existing superfine fiber synthetic leather, the invention mixes the recycled PET slices, the PA slices and the PE slices according to a certain proportion to manufacture the blended sea-island fiber, thereby achieving the purpose of material recycling. In addition, the benzene reduced water-based impregnated superfine fiber synthetic leather processed by the processing method has the advantages of good air permeability and moisture permeability, soft and comfortable hand feeling, natural leather-like style and the like.
Detailed Description
The invention relates to a processing method of benzene decrement waterborne impregnated superfine fiber synthetic leather, which comprises the following steps:
manufacturing fibers: mixing recycled PET slices (polyester slices), PA slices (nylon slices) and PE slices (polyethylene slices) according to a certain proportion, and preparing the blended sea-island fiber by a spinning process;
manufacturing non-woven fabrics: manufacturing superfine fiber non-woven fabric from the blended sea-island fiber through a needle punching process;
③ manufacturing the base cloth: shaping the superfine fiber non-woven fabric through a shaping process to obtain base cloth;
soaking and drying: impregnating the base cloth with aqueous polyurethane slurry, and drying the impregnated base cloth in an oven to obtain a semi-finished product to be split;
fifthly, splitting: performing fiber opening treatment on the semi-finished product to be subjected to fiber opening by using a benzene reduction method to obtain a fiber opening semi-finished product;
sixthly, drying, shaping and kneading: drying, oiling and shaping the split semi-finished product, and kneading the shaped split semi-finished product;
seventh, veneering: and (3) veneering the semi-finished product after the leather is kneaded with water-based resin to obtain the benzene reduced water-based impregnated superfine fiber synthetic leather.
The traditional superfine fiber synthetic leather needs DMF solvent, so that the problems of environmental pollution and damage to human health exist, and the whole preparation process of the invention adopts environment-friendly raw materials, so that the requirements of human protection and environment protection can be met, and the safety and health requirements of human bodies can be met. Meanwhile, in order to realize the recycling of the PET slices and solve the technical problem of material recycling in the existing superfine fiber synthetic leather, the invention mixes the recycled PET slices, the PA slices and the PE slices according to a certain proportion to manufacture the blended sea-island fiber, thereby achieving the purpose of material recycling.
In the present invention, in the step (i), the intrinsic viscosity of the recovered PET chips is 0.45 to 0.85 dl/g. Because PET slices must be melted into fluid in processing, the viscosity of the fluid is one of important indexes influencing polyester processing, and the physical significance of the fluid is to promote the flow of the fluid to generate shear stress per unit velocity; the intrinsic viscosity of the polyester chip is an important index for measuring the performance of the polyester chip, and can reflect the main application to a certain extent. In the processing technology of the invention, in order to realize recycling of the PET slices and guarantee the performance requirements, the intrinsic viscosity of the recycled PET slices is required to be between 0.45 and 0.85 dl/g.
In the present invention, in the step (i), the weight ratio of the recovered PET chip, PA chip, and PE chip is 20 to 30: 20-30: 20-40. Because the invention firstly proposes to use the recycled PET slices to manufacture the spinning fibers, in order to ensure that the manufactured spinning fibers can meet the actual production requirements, the inventor of the present invention carries out deep research and a large number of experiments to finally determine the specific weight ratio of the three slices.
In the invention, because the spinning process requires different temperatures at different positions, the screw of the screw extruder has a plurality of heating zones in the spinning process of the step (i).
Because the spinning process of the invention is carried out by mixing three different slices, and the melt difference of the different slices is larger, the screw of the screw extruder of the invention has 8 heating zones for achieving the purpose of mixed spinning.
In the invention, the temperature of the first heating zone is 145-155 ℃, the temperature of the second heating zone is 175-185 ℃, the temperature of the third heating zone is 215-225 ℃, the temperature of the fourth heating zone is 245-255 ℃, the temperature of the fifth heating zone is 275-281 ℃, the temperature of the sixth heating zone is 285-290 ℃, the temperature of the seventh heating zone is 285-290 ℃, and the temperature of the eighth heating zone is 283-287 ℃. The specific melt temperature during spinning is determined according to the variety and the running speed of raw materials and the performance requirements of products, and the invention adopts three raw materials of recycled PET slices, PA slices and PE slices for mixed production, so that in order to achieve the purpose of mixed production, the inventor carries out deep research on the three raw materials and finally obtains the specific temperature range values of the eight heating zones through a large number of tests.
In the spinning process of the step I, the temperature of cooling air for spinning is 16-22 ℃. In the high-speed melt spinning, cooling forming is one of the important processes of melt spinning, and when the wind temperature of cooling wind is abnormal, the unevenness of the spinning evenness is influenced; therefore, in order to reduce the influence, the temperature of the cooling air is set to be 16-22 ℃.
In the invention, the cooling air humidity of the spinning is 48-54%. Since the humidity has a direct influence on static electricity in the spinning winding and the waving of the filament bundle, the cooling air humidity is set to 48 to 54% in the present invention in order to reduce the actual influence.
In the invention, in order to ensure the spinning quality, in the spinning process of the step (i), the drafting multiple of the spinning is 3-5 times.
In the third step, the shaping process comprises the step of performing gradient heat shaping on the superfine fiber non-woven fabric by using a multi-stage oven. Since the spun and drawn fibers have an imperfect supramolecular structure and are not sufficiently stable, and their physical-mechanical properties are represented by high strength, low elongation, poor toughness and elasticity, and in particular, they undergo significant shrinkage when heated, it is necessary to repair and improve the structure of the fibers already formed during the forming process by heat-setting in order to increase the dimensional stability of the fibers. In order to reduce the shrinkage rate of the fiber, the invention adopts a multi-stage oven to carry out gradient heat setting on the superfine fiber non-woven fabric.
In the invention, in order to further reduce the shrinkage rate of the fibers and ensure the surface smoothness of the base fabric after heat setting, the multistage oven is a 7-stage oven.
In the present invention, the temperature of the 7-stage drying oven is set to 97-103 deg.C, 122-. Through drying gradually from low to high, can effectively guarantee that superfine fiber non-woven fabrics can not be because of the shrink deformation at heat setting's in-process to lead to the non-woven fabrics surface frizzy, the smooth finish is poor.
In the invention, in the third step, in order to accelerate the production progress, the shaping process further comprises cooling the heat-shaped superfine fiber non-woven fabric by using a cooling roller.
In the invention, the number of the cooling rollers is 3-6 in order to achieve faster and better cooling effect.
In the invention, in order to avoid the influence on the superfine fiber non-woven fabric after heat setting due to the excessively low temperature of the cooling roller, the temperature of the cooling roller is 15-25 ℃.
In the present invention, in the step (iv), when the base fabric is impregnated with the aqueous polyurethane slurry, the impregnation process is three times and four times. The aqueous polyurethane is a novel polyurethane system which takes water as a dispersion medium instead of an organic solvent, and is also called water-dispersed polyurethane, water-system polyurethane or water-based polyurethane; the waterborne polyurethane takes water as a solvent, and has the advantages of no pollution, safety, reliability, excellent mechanical property, good compatibility, easy modification and the like. The three-in four-bundle process refers to the process of three times of impregnation into the aqueous polyurethane slurry and four times of extrusion and rolling through a roller, specifically the process of extrusion and rolling-impregnation-extrusion and rolling-extrusion-impregnation-extrusion and rolling, and the base fabric can be endowed with a certain hand feeling after the three-in four-bundle process.
In the invention, the liquid carrying rate of impregnation is 70-90%; the impregnation time is 3-8 minutes. In the specific implementation, the impregnation effect is influenced by the liquid carrying rate and the impregnation time, and further the hand feeling of the base fabric is influenced, so that the liquid carrying rate is 70-90% and the impregnation time is 3-8 minutes in order to ensure better hand feeling.
In the invention, in the step (iv), the drying temperature of the impregnated base fabric is 120-130 ℃; the drying time of the base cloth is 15-20 minutes. In the specific implementation, too low drying temperature can cause too long drying time, too high drying temperature can cause damage to the base cloth, meanwhile, unreasonable temperature setting can also influence the performance of the finally obtained product, and in order to reduce the drying time and ensure the performance of the finally obtained product, the drying temperature is set to be 120-130 ℃, and the drying time is set to be 15-20 minutes.
In the invention, in order to achieve better crosslinking reaction, in the step (iv), after the base fabric is dried, the obtained semi-finished product to be opened is kept still for 20-28 hours.
In the fifth step, the fiber opening treatment of the semi-finished product to be opened by using the benzene reduction method to obtain the semi-finished product to be opened specifically comprises the following steps: soaking the semi-finished product to be split in hot toluene at 80-85 deg.C for 40-60min to perform splitting treatment, and washing with water at 95-105 deg.C for 20-30min to obtain split semi-finished product.
In the invention, in the step sixthly, the drying, oiling and shaping of the split semi-finished product are specifically as follows: immersing the split semi-finished product into a modified amino silicone oil solution for impregnation, and drying twice by using an oven after impregnation. The modified amino silicone oil has good water solubility, does not need emulsification when in use, and the impregnated fabric is soft and comfortable and has certain waterproofness, antistatic property and antifouling property; according to the invention, the fiber-opening semi-finished product is impregnated by using the modified amino silicone oil solution, so that the product is ensured to have the characteristics of softness, comfort, water resistance, pollution resistance, static resistance and the like.
In the invention, in order to achieve better impregnation effect and improve the product performance, the solubility of the modified amino silicone oil solution is 12-18 g/L.
In the invention, in order to achieve the purpose of accelerating the drying of the split semi-finished product and simultaneously avoid the damage of the split semi-finished product due to overhigh temperature, the drying temperature of the split semi-finished product after impregnation is 140-150 ℃.
The technical solution of the present invention is further explained with reference to the following embodiments:
example 1
A processing method of benzene decrement waterborne impregnation superfine fiber synthetic leather comprises the following steps: manufacturing fibers: and mixing the recycled PET slices, the PA slices and the PE slices according to a certain proportion, and preparing the blended sea-island fiber by a spinning process.
In this step (i), the intrinsic viscosity of the recovered PET chips was 0.45 dl/g. The weight ratio of the recovered PET slices to the PA slices to the PE slices is 20: 20: 40. the screw of the screw extruder has 8 heating zones, wherein the temperature of the first heating zone is 145 ℃, the temperature of the second heating zone is 175 ℃, the temperature of the third heating zone is 215 ℃, the temperature of the fourth heating zone is 245 ℃, the temperature of the fifth heating zone is 275 ℃, the temperature of the sixth heating zone is 285 ℃, the temperature of the seventh heating zone is 285 ℃, and the temperature of the eighth heating zone is 283 ℃. The cooling air temperature for spinning is 16 ℃. The cooling air humidity for spinning was 48%. The draft of the spinning was 3 times.
Manufacturing non-woven fabrics: and (3) manufacturing the superfine fiber non-woven fabric from the blended sea-island fiber through a needle punching process.
③ manufacturing the base cloth: and (3) shaping the superfine fiber non-woven fabric through a shaping process to obtain the base fabric. The shaping process comprises the step of carrying out gradient heat shaping on the superfine fiber non-woven fabric by adopting a 7-grade oven, wherein the temperature of the 7-grade oven is set to 97 ℃, 122 ℃, 140 ℃, 149 ℃, 158 ℃ and 161 ℃. The shaping process also comprises the step of cooling the heat-shaped superfine fiber non-woven fabric by adopting a cooling roller, wherein the number of the cooling roller is 3, and the temperature of the cooling roller is 15 ℃.
Soaking and drying: impregnating the base cloth with the aqueous polyurethane slurry, and drying the impregnated base cloth in an oven to obtain a semi-finished product to be split. When the base fabric is impregnated with the aqueous polyurethane slurry, the impregnation process is three-in four-out, the impregnation rate is 70%, the impregnation time is 3 minutes, the drying temperature of the impregnated base fabric is 120 ℃, and the drying time of the base fabric is 15 minutes. And after the base cloth is dried, standing the obtained semi-finished product to be split for 20 hours.
Fifthly, splitting: and (4) performing fiber opening treatment on the semi-finished product to be subjected to fiber opening by using a benzene reduction method to obtain the semi-finished product subjected to fiber opening. The method specifically comprises the steps of immersing a semi-finished product to be subjected to fiber opening in hot toluene at the temperature of 80 ℃ to reduce the weight for 40min for fiber opening treatment, and then washing with water at the temperature of 95 ℃ for 20min after the fiber opening treatment to obtain the semi-finished product subjected to fiber opening.
Sixthly, drying, shaping and kneading: drying, oiling and shaping the split fiber semi-finished product, and kneading the shaped split fiber semi-finished product. The oiling, drying and shaping of the split fiber semi-finished product are specifically as follows: immersing the split semi-finished product into a modified amino silicone oil solution for impregnation, and drying twice by using an oven after impregnation. The solubility of the modified amino silicone oil solution is 12g/L, and the drying temperature of the impregnated fiber-opening semi-finished product is 140 ℃.
Seventh, veneering: and (3) veneering the semi-finished product after the leather is kneaded with water-based resin to obtain the benzene reduced water-based impregnated superfine fiber synthetic leather.
Example 2
A processing method of benzene decrement waterborne impregnation superfine fiber synthetic leather comprises the following steps: manufacturing fibers: and mixing the recycled PET slices, the PA slices and the PE slices according to a certain proportion, and preparing the blended sea-island fiber by a spinning process.
In this step (i), the intrinsic viscosity of the recovered PET chip was 0.70 dl/g. The weight ratio of the recovered PET slices to the PA slices to the PE slices is 25: 25: 30. the screw of the screw extruder has 8 heating zones, wherein the temperature of the first heating zone is 150 ℃, the temperature of the second heating zone is 180 ℃, the temperature of the third heating zone is 220 ℃, the temperature of the fourth heating zone is 250 ℃, the temperature of the fifth heating zone is 278 ℃, the temperature of the sixth heating zone is 288 ℃, the temperature of the seventh heating zone is 288 ℃, and the temperature of the eighth heating zone is 286 ℃. The cooling air temperature for spinning is 18 ℃. The cooling air humidity of the spinning was 52%. The draft of the spinning was 4 times.
Manufacturing non-woven fabrics: and (3) manufacturing the superfine fiber non-woven fabric from the blended sea-island fiber through a needle punching process.
③ manufacturing the base cloth: and (3) shaping the superfine fiber non-woven fabric through a shaping process to obtain the base fabric. The shaping process comprises the step of carrying out gradient heat shaping on the superfine fiber non-woven fabric by adopting a 7-grade oven, wherein the temperature of the 7-grade oven is set to be 100 ℃, 125 ℃, 143 ℃, 152 ℃, 160 ℃ and 162 ℃ in sequence. The shaping process also comprises the step of cooling the heat-shaped superfine fiber non-woven fabric by adopting a cooling roller, wherein the number of the cooling roller is 4, and the temperature of the cooling roller is 20 ℃.
Soaking and drying: impregnating the base cloth with the aqueous polyurethane slurry, and drying the impregnated base cloth in an oven to obtain a semi-finished product to be split. When the base fabric is impregnated with the aqueous polyurethane slurry, the impregnation process is three-in four-out, the impregnation rate is 80%, the impregnation time is 5 minutes, the drying temperature of the impregnated base fabric is 125 ℃, and the drying time of the base fabric is 18 minutes. And after the base cloth is dried, standing the obtained semi-finished product to be split for 24 hours.
Fifthly, splitting: and (4) performing fiber opening treatment on the semi-finished product to be subjected to fiber opening by using a benzene reduction method to obtain the semi-finished product subjected to fiber opening. The method specifically comprises the steps of immersing a semi-finished product to be subjected to fiber opening in hot toluene at 82 ℃ for 50min of decrement for fiber opening treatment, and then washing with water at 100 ℃ for 25min after the fiber opening treatment to obtain the semi-finished product subjected to fiber opening.
Sixthly, drying, shaping and kneading: drying, oiling and shaping the split fiber semi-finished product, and kneading the shaped split fiber semi-finished product. The oiling, drying and shaping of the split fiber semi-finished product are specifically as follows: immersing the split semi-finished product into a modified amino silicone oil solution for impregnation, and drying twice by using an oven after impregnation. The solubility of the modified amino silicone oil solution is 15g/L, and the drying temperature of the impregnated fiber-opening semi-finished product is 145 ℃.
Seventh, veneering: and (3) veneering the semi-finished product after the leather is kneaded with water-based resin to obtain the benzene reduced water-based impregnated superfine fiber synthetic leather.
Example 3
A processing method of benzene decrement waterborne impregnation superfine fiber synthetic leather comprises the following steps: manufacturing fibers: and mixing the recycled PET slices, the PA slices and the PE slices according to a certain proportion, and preparing the blended sea-island fiber by a spinning process.
In this step (i), the intrinsic viscosity of the recovered PET chip was 0.85 dl/g. The weight ratio of the recovered PET slices to the PA slices to the PE slices is 30: 30: 20. the screw of the screw extruder has 8 heating zones, wherein the temperature of the first heating zone is 155 ℃, the temperature of the second heating zone is 185 ℃, the temperature of the third heating zone is 225 ℃, the temperature of the fourth heating zone is 255 ℃, the temperature of the fifth heating zone is 281 ℃, the temperature of the sixth heating zone is 290 ℃, the temperature of the seventh heating zone is 290 ℃, and the temperature of the eighth heating zone is 287 ℃. The cooling air temperature for spinning is 22 ℃. The cooling air humidity of the spinning was 54%. The draft of the spinning was 5 times.
Manufacturing non-woven fabrics: and (3) manufacturing the superfine fiber non-woven fabric from the blended sea-island fiber through a needle punching process.
③ manufacturing the base cloth: and (3) shaping the superfine fiber non-woven fabric through a shaping process to obtain the base fabric. The shaping process comprises the step of carrying out gradient heat shaping on the superfine fiber non-woven fabric by adopting a 7-grade oven, wherein the temperature of the 7-grade oven is set to be 103 ℃, 128 ℃, 146 ℃, 155 ℃, 161 ℃ and 164 ℃ in sequence. The shaping process also comprises the step of cooling the heat-shaped superfine fiber non-woven fabric by adopting cooling rollers, wherein the number of the cooling rollers is 6, and the temperature of the cooling rollers is 25 ℃.
Soaking and drying: impregnating the base cloth with the aqueous polyurethane slurry, and drying the impregnated base cloth in an oven to obtain a semi-finished product to be split. When the base fabric is impregnated with the aqueous polyurethane slurry, the impregnation process is three-in four-out, the impregnation rate is 90%, the impregnation time is 8 minutes, the drying temperature of the impregnated base fabric is 130 ℃, and the drying time of the base fabric is 20 minutes. And after the base cloth is dried, standing the obtained semi-finished product to be split for 28 hours.
Fifthly, splitting: and (4) performing fiber opening treatment on the semi-finished product to be subjected to fiber opening by using a benzene reduction method to obtain the semi-finished product subjected to fiber opening. The method specifically comprises the steps of immersing a semi-finished product to be subjected to fiber opening in hot toluene at the temperature of 85 ℃ for 60min to reduce the weight for fiber opening treatment, and then washing with 105 ℃ water for 30min after the fiber opening treatment to obtain the semi-finished product subjected to fiber opening.
Sixthly, drying, shaping and kneading: drying, oiling and shaping the split fiber semi-finished product, and kneading the shaped split fiber semi-finished product. The oiling, drying and shaping of the split fiber semi-finished product are specifically as follows: immersing the split semi-finished product into a modified amino silicone oil solution for impregnation, and drying twice by using an oven after impregnation. The solubility of the modified amino silicone oil solution is 18g/L, and the drying temperature of the impregnated fiber-opening semi-finished product is 150 ℃.
Seventh, veneering: and (3) veneering the semi-finished product after the leather is kneaded with water-based resin to obtain the benzene reduced water-based impregnated superfine fiber synthetic leather.
Example 4
A processing method of benzene decrement waterborne impregnation superfine fiber synthetic leather comprises the following steps: manufacturing fibers: and mixing the recycled PET slices, the PA slices and the PE slices according to a certain proportion, and preparing the blended sea-island fiber by a spinning process.
In this step (i), the intrinsic viscosity of the recovered PET chips was 0.45 dl/g. The weight ratio of the recovered PET slices to the PA slices to the PE slices is 22: 28: 30. the screw of the screw extruder has 8 heating zones, wherein the temperature of the first heating zone is 152 ℃, the temperature of the second heating zone is 180 ℃, the temperature of the third heating zone is 218 ℃, the temperature of the fourth heating zone is 249 ℃, the temperature of the fifth heating zone is 278 ℃, the temperature of the sixth heating zone is 289 ℃, the temperature of the seventh heating zone is 289 ℃, and the temperature of the eighth heating zone is 285 ℃. The cooling air temperature for spinning is 20 ℃. The cooling air humidity of the spinning was 53%. The draft of the spinning was 4 times.
Manufacturing non-woven fabrics: and (3) manufacturing the superfine fiber non-woven fabric from the blended sea-island fiber through a needle punching process.
③ manufacturing the base cloth: and (3) shaping the superfine fiber non-woven fabric through a shaping process to obtain the base fabric. The setting process comprises the step of carrying out gradient heat setting on the superfine fiber non-woven fabric by adopting a 7-level oven, wherein the temperature of the 7-level oven is set to 99 ℃, 126 ℃, 144 ℃, 152 ℃, 159 ℃ and 163 ℃ in sequence. The shaping process also comprises the step of cooling the heat-shaped superfine fiber non-woven fabric by adopting a cooling roller, wherein the number of the cooling roller is 5, and the temperature of the cooling roller is 23 ℃.
Soaking and drying: impregnating the base cloth with the aqueous polyurethane slurry, and drying the impregnated base cloth in an oven to obtain a semi-finished product to be split. When the base fabric is impregnated with the aqueous polyurethane slurry, the impregnation process is three-in four-out, the impregnation rate is 72%, the impregnation time is 6 minutes, the drying temperature of the impregnated base fabric is 126 ℃, and the drying time of the base fabric is 16 minutes. And after the base cloth is dried, standing the obtained semi-finished product to be split for 26 hours.
Fifthly, splitting: and (4) performing fiber opening treatment on the semi-finished product to be subjected to fiber opening by using a benzene reduction method to obtain the semi-finished product subjected to fiber opening. The method specifically comprises the steps of immersing a semi-finished product to be subjected to fiber opening in hot toluene at 84 ℃ for 52min of decrement for fiber opening treatment, and then washing with water at 98 ℃ for 26min after the fiber opening treatment to obtain the semi-finished product subjected to fiber opening.
Sixthly, drying, shaping and kneading: drying, oiling and shaping the split fiber semi-finished product, and kneading the shaped split fiber semi-finished product. The oiling, drying and shaping of the split fiber semi-finished product are specifically as follows: immersing the split semi-finished product into a modified amino silicone oil solution for impregnation, and drying twice by using an oven after impregnation. The solubility of the modified amino silicone oil solution is 14g/L, and the drying temperature of the impregnated fiber-opening semi-finished product is 150 ℃.
Seventh, veneering: and (3) veneering the semi-finished product after the leather is kneaded with water-based resin to obtain the benzene reduced water-based impregnated superfine fiber synthetic leather.
Example 5
A processing method of benzene decrement waterborne impregnation superfine fiber synthetic leather comprises the following steps: manufacturing fibers: and mixing the recycled PET slices, the PA slices and the PE slices according to a certain proportion, and preparing the blended sea-island fiber by a spinning process.
In this step (i), the intrinsic viscosity of the recovered PET chip was 0.62 dl/g. The weight ratio of the recovered PET slices to the PA slices to the PE slices is 30: 25: 25. the screw of the screw extruder has 8 heating zones, wherein the temperature of the first heating zone is 148 ℃, the temperature of the second heating zone is 177 ℃, the temperature of the third heating zone is 220 ℃, the temperature of the fourth heating zone is 251 ℃, the temperature of the fifth heating zone is 280 ℃, the temperature of the sixth heating zone is 287 ℃, the temperature of the seventh heating zone is 287 ℃, and the temperature of the eighth heating zone is 284 ℃. The cooling air temperature for spinning is 16 ℃. The cooling air humidity of the spinning was 52%. The draft of the spinning was 3 times.
Manufacturing non-woven fabrics: and (3) manufacturing the superfine fiber non-woven fabric from the blended sea-island fiber through a needle punching process.
③ manufacturing the base cloth: and (3) shaping the superfine fiber non-woven fabric through a shaping process to obtain the base fabric. The shaping process comprises the step of carrying out gradient heat shaping on the superfine fiber non-woven fabric by adopting a 7-grade oven, wherein the temperature of the 7-grade oven is set to be 101 ℃, 127 ℃, 145 ℃, 154 ℃, 160 ℃ and 162 ℃ in sequence. The shaping process also comprises the step of cooling the heat-shaped superfine fiber non-woven fabric by adopting a cooling roller, wherein the number of the cooling roller is 4, and the temperature of the cooling roller is 18 ℃.
Soaking and drying: impregnating the base cloth with the aqueous polyurethane slurry, and drying the impregnated base cloth in an oven to obtain a semi-finished product to be split. When the base fabric is impregnated with the aqueous polyurethane slurry, the impregnation process is three-in four-out, the impregnation rate is 90%, the impregnation time is 3 minutes, the drying temperature of the impregnated base fabric is 120 ℃, and the drying time of the base fabric is 18 minutes. And after the base cloth is dried, standing the obtained semi-finished product to be split for 22 hours.
Fifthly, splitting: and (4) performing fiber opening treatment on the semi-finished product to be subjected to fiber opening by using a benzene reduction method to obtain the semi-finished product subjected to fiber opening. The method specifically comprises the steps of immersing a semi-finished product to be subjected to fiber splitting in hot toluene at the temperature of 80 ℃ to reduce the weight for 60min for fiber splitting, and then washing with water at the temperature of 97 ℃ for 30min after the fiber splitting to obtain the semi-finished product subjected to fiber splitting.
Sixthly, drying, shaping and kneading: drying, oiling and shaping the split fiber semi-finished product, and kneading the shaped split fiber semi-finished product. The oiling, drying and shaping of the split fiber semi-finished product are specifically as follows: immersing the split semi-finished product into a modified amino silicone oil solution for impregnation, and drying twice by using an oven after impregnation. The solubility of the modified amino silicone oil solution is 17g/L, and the drying temperature of the impregnated fiber-opening semi-finished product is 144 ℃.
Seventh, veneering: and (3) veneering the semi-finished product after the leather is kneaded with water-based resin to obtain the benzene reduced water-based impregnated superfine fiber synthetic leather.
Example 6
A processing method of benzene decrement waterborne impregnation superfine fiber synthetic leather comprises the following steps: manufacturing fibers: and mixing the recycled PET slices, the PA slices and the PE slices according to a certain proportion, and preparing the blended sea-island fiber by a spinning process.
In this step (i), the intrinsic viscosity of the recovered PET chip was 0.85 dl/g. The weight ratio of the recycled PET slices to the PA slices to the PE slices is 26: 21: 33. the screw of the screw extruder has 8 heating zones, wherein the temperature of the first heating zone is 146 ℃, the temperature of the second heating zone is 181 ℃, the temperature of the third heating zone is 221 ℃, the temperature of the fourth heating zone is 250 ℃, the temperature of the fifth heating zone is 277 ℃, the temperature of the sixth heating zone is 288 ℃, the temperature of the seventh heating zone is 288 ℃, and the temperature of the eighth heating zone is 286 ℃. The cooling air temperature for spinning was 19 ℃. The cooling air humidity for spinning was 48%. The draft of the spinning was 5 times.
Manufacturing non-woven fabrics: and (3) manufacturing the superfine fiber non-woven fabric from the blended sea-island fiber through a needle punching process.
③ manufacturing the base cloth: and (3) shaping the superfine fiber non-woven fabric through a shaping process to obtain the base fabric. The setting process comprises the step of carrying out gradient heat setting on the superfine fiber non-woven fabric by adopting a 7-grade oven, wherein the temperature of the 7-grade oven is set to be 100 ℃, 125 ℃, 143 ℃, 151 ℃, 159 ℃ and 163 ℃ in sequence. The shaping process also comprises the step of cooling the heat-shaped superfine fiber non-woven fabric by adopting a cooling roller, wherein the number of the cooling roller is 3, and the temperature of the cooling roller is 15 ℃.
Soaking and drying: impregnating the base cloth with the aqueous polyurethane slurry, and drying the impregnated base cloth in an oven to obtain a semi-finished product to be split. When the base fabric is impregnated with the aqueous polyurethane slurry, the impregnation process is three-in four-out, the impregnation rate is 85%, the impregnation time is 7 minutes, the drying temperature of the impregnated base fabric is 130 ℃, and the drying time of the base fabric is 15 minutes. And after the base cloth is dried, standing the obtained semi-finished product to be split for 28 hours.
Fifthly, splitting: and (4) performing fiber opening treatment on the semi-finished product to be subjected to fiber opening by using a benzene reduction method to obtain the semi-finished product subjected to fiber opening. The method specifically comprises the steps of immersing a semi-finished product to be subjected to fiber opening in hot toluene at 85 ℃ for 40min to reduce weight for fiber opening treatment, and then washing with water at 95 ℃ for 30min after the fiber opening treatment to obtain the semi-finished product subjected to fiber opening.
Sixthly, drying, shaping and kneading: drying, oiling and shaping the split fiber semi-finished product, and kneading the shaped split fiber semi-finished product. The oiling, drying and shaping of the split fiber semi-finished product are specifically as follows: immersing the split semi-finished product into a modified amino silicone oil solution for impregnation, and drying twice by using an oven after impregnation. The solubility of the modified amino silicone oil solution is 18g/L, and the drying temperature of the impregnated fiber-opening semi-finished product is 148 ℃.
Seventh, veneering: and (3) veneering the semi-finished product after the leather is kneaded with water-based resin to obtain the benzene reduced water-based impregnated superfine fiber synthetic leather.
The invention also provides the benzene reduced waterborne impregnated superfine fiber synthetic leather which is prepared by the processing method. The benzene reduced water-based impregnated superfine fiber synthetic leather processed by the processing method has the advantages of good air permeability and moisture permeability, soft and comfortable hand feeling, natural leather-like style and the like.
Although specific embodiments of the invention have been described above, it will be understood by those skilled in the art that the specific embodiments described are illustrative only and are not limiting upon the scope of the invention, and that equivalent modifications and variations can be made by those skilled in the art without departing from the spirit of the invention, which is to be limited only by the appended claims.
Claims (10)
1. A processing method of benzene decrement waterborne impregnation superfine fiber synthetic leather is characterized in that: the processing method comprises the following steps:
firstly, mixing recycled PET slices, PA slices and PE slices according to a certain proportion, and preparing blended sea-island fibers by a spinning process;
manufacturing superfine fiber non-woven fabric from the blended sea-island fiber through a needle punching process;
thirdly, shaping the superfine fiber non-woven fabric through a shaping process to obtain base cloth;
soaking the base cloth in the aqueous polyurethane slurry, and drying the soaked base cloth in an oven to obtain a semi-finished product to be split;
fifthly, performing fiber opening treatment on the semi-finished product to be subjected to fiber opening by using a benzene reduction method to obtain a fiber opening semi-finished product;
sixthly, drying the fiber-opening semi-finished product, applying oil for shaping, and kneading the shaped fiber-opening semi-finished product;
and seventhly, veneering the semi-finished product after the leather is kneaded with water-based resin to obtain the benzene-reduced water-based impregnated superfine fiber synthetic leather.
2. The processing method of the benzene reduced waterborne impregnated superfine fiber synthetic leather according to claim 1, which is characterized in that: in the step (i), the intrinsic viscosity of the recovered PET chips is 0.45 to 0.85 dl/g.
3. The processing method of the benzene reduced waterborne impregnated superfine fiber synthetic leather according to claim 1, which is characterized in that: in the step (i), the weight ratio of the recycled PET slices, PA slices and PE slices is 20-30: 20-30: 20-40.
4. The processing method of the benzene reduced waterborne impregnated superfine fiber synthetic leather according to claim 1, which is characterized in that: in the spinning process of the first step, a screw of the screw extruder is provided with a plurality of heating zones.
5. The processing method of the benzene reduced waterborne impregnated superfine fiber synthetic leather according to claim 4, wherein the processing method comprises the following steps: the screw of the screw extruder had 8 heating zones.
6. The processing method of the benzene reduced waterborne impregnated superfine fiber synthetic leather according to claim 5, characterized in that: the temperature of the first heating zone is 145-155 ℃, the temperature of the second heating zone is 175-185 ℃, the temperature of the third heating zone is 215-225 ℃, the temperature of the fourth heating zone is 245-255 ℃, the temperature of the fifth heating zone is 275-281 ℃, the temperature of the sixth heating zone is 285-290 ℃, the temperature of the seventh heating zone is 285-290 ℃, and the temperature of the eighth heating zone is 283-287 ℃.
7. The processing method of the benzene reduced waterborne impregnated superfine fiber synthetic leather according to claim 6, characterized in that: in the spinning process of the step I, the temperature of cooling air for spinning is 16-22 ℃.
8. The processing method of the benzene reduced waterborne impregnated superfine fiber synthetic leather according to claim 7, which is characterized in that: the cooling air humidity of the spinning is 48-54%.
9. The processing method of the benzene reduced waterborne impregnated superfine fiber synthetic leather according to claim 8, wherein the processing method comprises the following steps: in the spinning process of the step I, the drafting multiple of the spinning is 3-5 times.
10. The processing method of the benzene reduced waterborne impregnated superfine fiber synthetic leather according to claim 1, which is characterized in that: in the third step, the shaping process comprises the step of performing gradient heat shaping on the superfine fiber non-woven fabric by adopting a multi-stage oven.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113802386A (en) * | 2021-04-21 | 2021-12-17 | 安安(中国)有限公司 | Method for manufacturing superfine fiber synthetic leather with high color fastness |
| CN114457439A (en) * | 2022-03-04 | 2022-05-10 | 明新孟诺卡(江苏)新材料有限公司 | Preparation method of renewable high-strength high-elasticity polyester-nylon sea-island composite filament |
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| CN113802386A (en) * | 2021-04-21 | 2021-12-17 | 安安(中国)有限公司 | Method for manufacturing superfine fiber synthetic leather with high color fastness |
| CN114575168A (en) * | 2022-02-17 | 2022-06-03 | 安踏（中国）有限公司 | Preparation method of synthetic leather and synthetic leather |
| CN114457439A (en) * | 2022-03-04 | 2022-05-10 | 明新孟诺卡(江苏)新材料有限公司 | Preparation method of renewable high-strength high-elasticity polyester-nylon sea-island composite filament |
| CN115058901A (en) * | 2022-05-27 | 2022-09-16 | 安安(中国)有限公司 | Processing method of bio-based superfine fiber synthetic leather |
| CN115058900A (en) * | 2022-05-27 | 2022-09-16 | 安安(中国)有限公司 | Processing method of benzene-reduced waterborne bio-based superfine fiber synthetic leather |
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