CN115305726A - PET (polyethylene terephthalate) microfiber suede leather capable of reducing formaldehyde and preparation method thereof - Google Patents
PET (polyethylene terephthalate) microfiber suede leather capable of reducing formaldehyde and preparation method thereof Download PDFInfo
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- CN115305726A CN115305726A CN202210827813.2A CN202210827813A CN115305726A CN 115305726 A CN115305726 A CN 115305726A CN 202210827813 A CN202210827813 A CN 202210827813A CN 115305726 A CN115305726 A CN 115305726A
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- photocatalyst
- resin
- pet
- suede leather
- formaldehyde
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- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 title claims abstract description 228
- 239000010985 leather Substances 0.000 title claims abstract description 90
- 229920001410 Microfiber Polymers 0.000 title claims abstract description 70
- 239000003658 microfiber Substances 0.000 title claims abstract description 68
- 230000001603 reducing effect Effects 0.000 title claims abstract description 52
- 238000002360 preparation method Methods 0.000 title claims abstract description 26
- -1 polyethylene terephthalate Polymers 0.000 title claims description 6
- 229920000139 polyethylene terephthalate Polymers 0.000 title description 69
- 239000005020 polyethylene terephthalate Substances 0.000 title description 69
- 239000011941 photocatalyst Substances 0.000 claims abstract description 133
- 229920005989 resin Polymers 0.000 claims abstract description 120
- 239000011347 resin Substances 0.000 claims abstract description 120
- 239000000835 fiber Substances 0.000 claims abstract description 66
- 238000009987 spinning Methods 0.000 claims abstract description 57
- 239000004745 nonwoven fabric Substances 0.000 claims abstract description 44
- 239000006087 Silane Coupling Agent Substances 0.000 claims abstract description 36
- 239000004594 Masterbatch (MB) Substances 0.000 claims abstract description 35
- 238000000034 method Methods 0.000 claims abstract description 30
- 238000002156 mixing Methods 0.000 claims abstract description 27
- 238000010409 ironing Methods 0.000 claims abstract description 26
- 238000002844 melting Methods 0.000 claims abstract description 24
- 230000008018 melting Effects 0.000 claims abstract description 24
- 230000008569 process Effects 0.000 claims abstract description 17
- 229920005749 polyurethane resin Polymers 0.000 claims abstract description 15
- 238000004043 dyeing Methods 0.000 claims abstract description 14
- 238000005406 washing Methods 0.000 claims abstract description 14
- 238000001035 drying Methods 0.000 claims abstract description 12
- 238000005469 granulation Methods 0.000 claims abstract description 7
- 230000003179 granulation Effects 0.000 claims abstract description 7
- 238000001125 extrusion Methods 0.000 claims abstract description 4
- 239000002245 particle Substances 0.000 claims description 31
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 27
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 claims description 20
- 230000001699 photocatalysis Effects 0.000 claims description 14
- 230000000694 effects Effects 0.000 claims description 13
- 238000004381 surface treatment Methods 0.000 claims description 12
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 claims description 8
- 229910052982 molybdenum disulfide Inorganic materials 0.000 claims description 8
- 239000002994 raw material Substances 0.000 claims description 7
- XDLMVUHYZWKMMD-UHFFFAOYSA-N 3-trimethoxysilylpropyl 2-methylprop-2-enoate Chemical compound CO[Si](OC)(OC)CCCOC(=O)C(C)=C XDLMVUHYZWKMMD-UHFFFAOYSA-N 0.000 claims description 6
- BPSIOYPQMFLKFR-UHFFFAOYSA-N trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CO[Si](OC)(OC)CCCOCC1CO1 BPSIOYPQMFLKFR-UHFFFAOYSA-N 0.000 claims description 6
- WOXXJEVNDJOOLV-UHFFFAOYSA-N ethenyl-tris(2-methoxyethoxy)silane Chemical compound COCCO[Si](OCCOC)(OCCOC)C=C WOXXJEVNDJOOLV-UHFFFAOYSA-N 0.000 claims description 5
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 claims description 5
- 229910001887 tin oxide Inorganic materials 0.000 claims description 5
- ITRNXVSDJBHYNJ-UHFFFAOYSA-N tungsten disulfide Chemical compound S=[W]=S ITRNXVSDJBHYNJ-UHFFFAOYSA-N 0.000 claims description 5
- 239000005083 Zinc sulfide Substances 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- UHYPYGJEEGLRJD-UHFFFAOYSA-N cadmium(2+);selenium(2-) Chemical compound [Se-2].[Cd+2] UHYPYGJEEGLRJD-UHFFFAOYSA-N 0.000 claims description 3
- QGLKJKCYBOYXKC-UHFFFAOYSA-N nonaoxidotritungsten Chemical compound O=[W]1(=O)O[W](=O)(=O)O[W](=O)(=O)O1 QGLKJKCYBOYXKC-UHFFFAOYSA-N 0.000 claims description 3
- 229910001930 tungsten oxide Inorganic materials 0.000 claims description 3
- 229910052984 zinc sulfide Inorganic materials 0.000 claims description 3
- DRDVZXDWVBGGMH-UHFFFAOYSA-N zinc;sulfide Chemical compound [S-2].[Zn+2] DRDVZXDWVBGGMH-UHFFFAOYSA-N 0.000 claims description 3
- 238000005470 impregnation Methods 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 3
- 238000007711 solidification Methods 0.000 abstract description 2
- 230000008023 solidification Effects 0.000 abstract description 2
- 239000000155 melt Substances 0.000 description 36
- 239000002131 composite material Substances 0.000 description 23
- 230000000052 comparative effect Effects 0.000 description 20
- 239000007864 aqueous solution Substances 0.000 description 15
- 239000000463 material Substances 0.000 description 12
- 238000005520 cutting process Methods 0.000 description 11
- 230000009467 reduction Effects 0.000 description 11
- 238000009960 carding Methods 0.000 description 10
- 238000003860 storage Methods 0.000 description 9
- 238000005507 spraying Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- 238000003756 stirring Methods 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 5
- 230000001376 precipitating effect Effects 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000001590 oxidative effect Effects 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 239000004408 titanium dioxide Substances 0.000 description 4
- ZNOKGRXACCSDPY-UHFFFAOYSA-N tungsten trioxide Chemical compound O=[W](=O)=O ZNOKGRXACCSDPY-UHFFFAOYSA-N 0.000 description 4
- UUEWCQRISZBELL-UHFFFAOYSA-N 3-trimethoxysilylpropane-1-thiol Chemical compound CO[Si](OC)(OC)CCCS UUEWCQRISZBELL-UHFFFAOYSA-N 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 238000005054 agglomeration Methods 0.000 description 3
- 230000002776 aggregation Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 2
- 238000009827 uniform distribution Methods 0.000 description 2
- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical compound CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 description 1
- WUPHOULIZUERAE-UHFFFAOYSA-N 3-(oxolan-2-yl)propanoic acid Chemical compound OC(=O)CCC1CCCO1 WUPHOULIZUERAE-UHFFFAOYSA-N 0.000 description 1
- SJECZPVISLOESU-UHFFFAOYSA-N 3-trimethoxysilylpropan-1-amine Chemical compound CO[Si](OC)(OC)CCCN SJECZPVISLOESU-UHFFFAOYSA-N 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 229910052980 cadmium sulfide Inorganic materials 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010036 direct spinning Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 239000002649 leather substitute Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000002121 nanofiber Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
-
- 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
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/88—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds
- D01F6/92—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds of polyesters
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
- D06N3/0004—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using ultra-fine two-component fibres, e.g. island/sea, or ultra-fine one component fibres (< 1 denier)
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
- D06N3/0015—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using fibres of specified chemical or physical nature, e.g. natural silk
- D06N3/0036—Polyester fibres
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/007—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
- D06N3/0075—Napping, teasing, raising or abrading of the resin coating
-
- 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
- D06N2211/00—Specially adapted uses
- D06N2211/12—Decorative or sun protection articles
- D06N2211/28—Artificial leather
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Dispersion Chemistry (AREA)
- Catalysts (AREA)
Abstract
The application relates to PET microfiber suede leather capable of reducing formaldehyde and a preparation method thereof, wherein the preparation method comprises the following steps: mixing and drying a silane coupling agent and a nano photocatalyst to obtain a modified nano photocatalyst, wherein the nano photocatalyst comprises a photocatalyst and a photocatalyst promoter; carrying out melt extrusion granulation on the modified nano photocatalyst and PET resin to obtain resin master batches; respectively melting and extruding the resin master batch and the COPET water-soluble resin, and then preparing the figured island fiber yarn by an figured island spinning process; preparing a non-woven fabric from the figured island fiber yarns through a needling process; the non-woven fabric is subjected to ironing, polyurethane resin impregnation, solidification, water washing, fiber opening, napping, dyeing and post-treatment. According to the preparation method provided by the application, the photocatalyst and the PET resin are fused and blended, the binding force of the photocatalyst and the PET resin is improved, the silane coupling agent improves the dispersibility of the photocatalyst in the PET resin, the formaldehyde removing capability is effectively improved, and the photocatalyst is remained in the PET resin in a large amount after fiber opening by combining a fixed island fiber forming process, so that the function of reducing formaldehyde is realized.
Description
Technical Field
The application relates to the technical field of artificial leather manufacturing, in particular to PET (polyethylene terephthalate) microfiber suede leather capable of reducing formaldehyde and a preparation method thereof.
Background
Due to the fact that superfine fiber suede leather (short for microfiber suede leather, suede leather or similar suede leather) has fashionable appearance effect and touch, the superfine fiber suede leather is mainly used for top-grade brand vehicle types such as seats and steering wheels in the early stage of the automobile industry. Along with the reduction of the price and the improvement of the quality of domestic automobiles, the automobile-type-changing device is widely applied to more and more automobile types.
In the passenger compartment of the automobile, due to the use of various non-metallic materials such as plastic, leather, foam, paint and the like in a large area, the formaldehyde content in the passenger compartment of the automobile is at risk, and the health of a user is affected.
Nanometer photocatalyst material is known as an effective method for decomposing formaldehyde, wherein nanometer Titanium Dioxide (Titanium Dioxide) is the most red nanometer photocatalyst material in the world due to its strong oxidizing ability, stable chemical properties and no toxicity, and under the action of ultraviolet light or in combination with a photocatalytic promoter under the action of visible light, electrons on the surfaces of Titanium Dioxide particles can be excited to be activated to generate positively charged holes, and the holes have strong oxidizing property, so that organic matters such as formaldehyde and the like can be oxidized and decomposed into harmless carbon Dioxide and water.
Because the formaldehyde can be decomposed only by directly contacting with air, it has been reported that the nano photocatalyst material is mostly used as load fiber, preparation coating and film, and the nano photocatalyst material is mostly coated on the fiber surface as the filter element of air conditioner or air purifier in the technology of reducing formaldehyde in vehicle, but this method can only play the role of auxiliary reducing formaldehyde when the air conditioner or air purifier is in working state, and the filter element needs to be replaced regularly.
Except a small amount of polyurethane components, the surface of the microfiber suede leather is mostly non-woven ultrafine fiber bundles treated by a buffing process, including PET ultrafine fiber bundles, the microfiber suede leather has a very large specific surface area and can adsorb a large amount of pollutants such as formaldehyde in the air, and if photocatalyst substances can be present and enriched on the surface of the microfiber suede leather through a certain technology, the microfiber suede leather has the capability of reducing formaldehyde, so that the air quality in an automobile passenger compartment can be remarkably improved, and meanwhile, the microfiber suede leather has a wider application prospect.
In the related technology, the superfine fiber suede leather is immersed in a treatment solution containing a nano photocatalyst substance such as a nano titanium dioxide photocatalyst and the like, so that the purpose of removing formaldehyde by the superfine fiber suede leather with a photocatalytic function is achieved. However, this approach has two problems: firstly, as the nanometer photocatalyst particles are attached to the surface of the microfiber suede leather fiber in a physical adsorption mode, even if a curing agent component is specially added, the nanometer photocatalyst particles are easy to separate from the surface of the microfiber suede leather under various liquid media and high-frequency friction environments of automotive interiors, and the reliable durability of formaldehyde elimination is relatively high; secondly, the content of the nanometer photocatalyst substances on the surface of the superfine fiber suede leather is limited due to the mechanism of physical adsorption, and the effect of formaldehyde reduction needs to be improved urgently.
Disclosure of Invention
The embodiment of the application provides PET microfiber suede leather capable of reducing formaldehyde and a preparation method thereof, and aims to solve the problems that in the related art, the formaldehyde eliminating effect of the PET microfiber suede leather is poor and the eliminating durability is poor.
In a first aspect, a preparation method of PET microfiber suede leather capable of reducing formaldehyde is provided, which comprises the following steps:
and (3) nano photocatalyst surface treatment: mixing and drying a silane coupling agent and a nano photocatalyst to obtain a modified nano photocatalyst, wherein the nano photocatalyst comprises a photocatalyst and a photocatalyst promoter;
melting, mixing and granulating: carrying out melt extrusion granulation on the modified nano photocatalyst and PET resin to obtain resin master batches;
fixing island to form fiber: respectively melting and respectively extruding the resin master batch and the COPET water-soluble resin, and then preparing the figured fiber yarns by a figured spinning process;
forming non-woven fabrics: preparing the figured island fiber yarns into non-woven fabrics by a needling process;
forming suede leather: and (3) ironing the non-woven fabric, impregnating polyurethane resin, solidifying, washing, opening, raising, dyeing and post-treating to obtain the PET microfiber suede leather capable of reducing formaldehyde.
In some embodiments, the photocatalyst comprises anatase nano-titania.
In some embodiments, the photocatalytic promoter comprises at least one of molybdenum disulfide, tungsten disulfide, zinc sulfide, cadmium selenide, tin oxide, tungsten oxide.
In some embodiments, the mass ratio of the photocatalyst to the photocatalyst promoter is (1-10): 1.
in some embodiments, the photocatalyst has a particle size of 5nm to 300nm;
the grain size of the photocatalytic promoter is 5 nm-50 nm.
In some embodiments, the silane coupling agent comprises at least one of A-1100, A-1110, A-187, A-174, and A-172.
In some embodiments, in the "nano photocatalyst surface treatment" step, the mass ratio of the silane coupling agent to the nano photocatalyst is 0.1% to 1.5%.
In some embodiments, in the step of "melt mixing granulation", the raw materials include, by weight, 1 to 25 parts of the modified nano photocatalyst and 100 parts of the PET resin.
In some embodiments, in the step of "island-fixing fiber formation", the raw materials include, by weight, 100 parts of the resin masterbatch and 40 to 130 parts of the COPET water-soluble resin.
In a second aspect, a PET microfiber suede leather is provided, and is prepared by the preparation method.
The technical scheme who provides this application brings beneficial effect includes: according to the preparation method of the PET microfiber suede leather capable of reducing formaldehyde, provided by the embodiment of the application, on one hand, the silane coupling agent is used for modifying the photocatalyst, so that hydroxyl on the surface of the nano photocatalyst is replaced, the hydrophilicity of nano titanium dioxide particles is greatly weakened, the agglomeration of the nano titanium dioxide particles is prevented, the specific surface area and the dispersibility of the nano titanium dioxide particles are increased, the contact probability of the nano titanium dioxide particles and formaldehyde in air is increased, the formaldehyde removal capacity is effectively improved, the fixed island fiber forming process is combined, the photocatalyst in the PET resin is prevented from being diffused into the marine COPET resin, and during subsequent fiber opening, the marine COPET resin is dissolved, and the PET microfiber containing the photocatalyst is exposed, so that the function of reducing formaldehyde is realized;
on the other hand, the modified photocatalyst and the main resin of the PET microfiber suede leather are melted, blended and granulated, so that the binding force of the photocatalyst and the PET resin is effectively improved, and the PET microfiber suede leather is endowed with the capability of efficiently reducing formaldehyde for a long time.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The embodiment of the application provides a preparation method of PET microfiber suede leather capable of reducing formaldehyde, which comprises the following steps:
and (3) nano photocatalyst surface treatment: mixing and drying a silane coupling agent and a nano photocatalyst to obtain a modified nano photocatalyst, wherein the nano photocatalyst comprises a photocatalyst and a photocatalyst promoter;
melting, mixing and granulating: carrying out melt extrusion granulation on the modified nano photocatalyst and PET resin to obtain resin master batches;
fixing island to form fiber: respectively melting and respectively extruding the resin master batch and the COPET water-soluble resin, and then preparing the figured fiber yarns by a figured spinning process;
forming non-woven fabrics: preparing the figured island fiber yarns into non-woven fabrics by a needling process;
forming suede leather: and (3) ironing the non-woven fabric, impregnating polyurethane resin, solidifying, washing, opening, raising, dyeing and post-treating to obtain the PET microfiber suede leather capable of reducing formaldehyde.
According to the preparation method of the PET microfiber suede leather capable of reducing formaldehyde, on one hand, the silane coupling agent is used for modifying the photocatalyst, so that hydroxyl on the surface of the nano photocatalyst is replaced, the hydrophilicity of nano titanium dioxide particles is greatly weakened, the agglomeration of the nano titanium dioxide particles is prevented, the specific surface area and the dispersibility of the nano titanium dioxide particles are increased, the contact probability of the nano titanium dioxide particles and formaldehyde in air is increased, the formaldehyde removing capacity is effectively improved, the fixed island fiber forming process is combined, the photocatalyst in the PET resin is prevented from being diffused into the sea-phase COPET resin, the sea-phase COPET resin is dissolved when fibers are subsequently opened, the PET microfiber containing the photocatalyst is exposed, and the function of reducing formaldehyde is realized;
on the other hand, the modified photocatalyst and the main resin of the PET microfiber suede leather are melted, blended and granulated, so that the binding force of the photocatalyst and the PET resin is effectively improved, and the PET microfiber suede leather is endowed with the capability of efficiently reducing formaldehyde for a long time.
In a preferred embodiment, the "mixing and drying the silane coupling agent and the nanophotocatalyst" includes:
preparing a silane coupling agent into an aqueous solution, adjusting the pH value to 3-5, mixing the aqueous solution with the nano photocatalyst, and drying.
Specifically, the "island-fixed fiber forming" process may adopt a conventional island-fixed fiber forming technology in the technical field, which is not particularly limited herein, and may include the following steps:
the sea component slices and the island component slices are heated, melted and extruded through two screw extruders respectively, spinning melts are formed through respective melt filters, the spinning melts entering a spinning box body from a melt pipeline firstly enter respective metering pumps for metering, then enter a composite spinning assembly, and are ejected through a spinneret plate to form the sea-island structure composite filament bundle.
Specifically, the "nonwoven fabric forming" process may adopt a nonwoven fabric forming process commonly used in the art, and is not particularly limited herein, and for example, may include the following steps: and (3) drafting, curling, cutting, opening, carding, lapping, needling and ironing the adventitious island fiber filaments to obtain the non-woven fabric.
Specifically, the non-woven fabric can be ironed in the suede leather forming process by adopting a conventional ironing technology in the technical field, and the ironing technology is not particularly limited and is used for eliminating through pin holes on the non-woven fabric and enabling the non-woven fabric to be changed into a compact and flat structure.
In some embodiments, the photocatalyst comprises anatase nano-titania.
The anatase type nano titanium dioxide has strong oxidizing ability and stable and nontoxic chemical properties, or can excite electrons on the surfaces of titanium dioxide particles to be activated under the action of visible light by matching with a photocatalytic promoter to generate positively charged holes, and the holes have strong oxidizing property and can oxidize and decompose organic matters such as formaldehyde and the like into harmless carbon dioxide and water, so that the aim of reducing the formaldehyde is fulfilled, and the reducing effect is good.
In some embodiments, the photocatalytic promoter comprises at least one of molybdenum disulfide, tungsten disulfide, zinc sulfide, cadmium selenide, tin oxide, tungsten oxide.
The photocatalytic promoter can improve the activity of a photocatalyst, and the wavelength of a light source required by the anatase type nano titanium dioxide for catalyzing the decomposition of formaldehyde is expanded to common visible light from ultraviolet light, so that the microfiber suede leather provided by the application can have a good formaldehyde removing effect under most climatic conditions.
In some embodiments, the mass ratio of the photocatalyst to the photocatalyst promoter is (1-10): 1.
the mass ratio of the photocatalyst to the photocatalytic promoter is in the range, so that the wavelength range of a light source required by the photocatalyst for catalyzing the decomposition of formaldehyde can be furthest increased, and the formaldehyde reducing capacity of the microfiber suede leather is further improved.
In some embodiments, the photocatalyst has a particle size of 5nm to 300nm;
the grain size of the photocatalytic promoter is 5 nm-50 nm.
The particle sizes of the photocatalyst and the photocatalytic promoter are within the range, so that the photocatalyst and the photocatalytic promoter have larger specific surface area while ensuring higher dispersity in PET resin, and are beneficial to improving the activity of the photocatalyst, thereby improving the effect of reducing formaldehyde.
In some embodiments, the silane coupling agent includes at least one of A-1100, A-1110, A-187, A-174, A-172.
The silane coupling agent can improve the dispersibility of the photocatalyst and the photocatalytic promoter in the PET resin, has high compatibility with the PET resin, and is beneficial to the uniform distribution of the photocatalyst in the microfiber suede leather.
Specifically, the A-1100 is 3-aminopropyltriethoxysilane, the A-1110 is 3-aminopropyltrimethoxysilane, the A-187 is glycidoxypropyltrimethoxysilane, the A-174 is methacryloxypropyltrimethoxysilane, and the A-172 is vinyl-tris (2-methoxyethoxy) silane.
In some embodiments, in the "nano photocatalyst surface treatment" step, the mass ratio of the silane coupling agent to the nano photocatalyst is 0.1% to 1.5%.
Namely, the mass ratio of the silane coupling agent to the nano photocatalyst is (0.1-1.5): 100.
the mass ratio of the silane coupling agent to the nano photocatalyst is in the range, so that the silane coupling agent can be ensured to carry out surface modification on the photocatalyst to the maximum extent.
In some embodiments, in the step of "melt mixing granulation", the raw materials comprise 1 to 25 parts by weight of the modified nano photocatalyst and 100 parts by weight of the PET resin.
The weight part of the modified nano photocatalyst is in the range of 1-25 parts, if the weight part of the modified nano photocatalyst is less than 1 part, the modified nano photocatalyst dispersed in the PET resin is too little, the formaldehyde reduction effect is limited and is not lasting, and if the weight part of the modified nano photocatalyst is more than 25 parts, on one hand, the production cost of the microfiber suede leather is increased, on the other hand, the agglomeration phenomenon easily occurs if the content of the modified nano photocatalyst is too much, and the uniform distribution of the modified nano photocatalyst on the surface of the microfiber suede leather is not facilitated.
In some embodiments, in the step of "fixed island fiber formation", the raw materials include, by weight, 100 parts of the resin master batch and 40-130 parts of the COPET water-soluble resin.
Specifically, in the island-fixing fiber forming process, the resin master batch is used as a disperse phase, namely an 'island' phase, and the COPET water-soluble resin is used as a continuous phase, namely a 'sea' phase, on the premise that the resin master batch is 100 parts, if the weight part of the COPET water-soluble resin is lower than 40 parts, the content of the disperse phase is relatively overhigh, the filling degree of island fibers in the sea phase is overhigh, large pieces of the island fibers are easily adhered, even the sea-island composite is converted into parallel composite, and therefore, spinning bent legs are caused, the spinnability is reduced, and the fiber quality is poor; if the weight part of the COPET water-soluble resin is more than 130 parts, the production cost and the subsequent wastewater treatment process are obviously increased.
In a second aspect, a PET microfiber suede leather is provided, and is prepared by the preparation method.
The present invention is further illustrated by the following examples.
Example 1
The embodiment is used for explaining the PET microfiber suede leather capable of reducing formaldehyde and the preparation method thereof, and comprises the following steps:
and (3) nano photocatalyst surface treatment: preparing a silane coupling agent A-1100 into an aqueous solution, adjusting the pH to =4, adding the nano photocatalyst into the aqueous solution of the silane coupling agent, fully stirring, standing, precipitating and drying to obtain the modified nano photocatalyst, wherein the nano photocatalyst consists of anatase type nano titanium dioxide with the particle size of 10nm and nano molybdenum disulfide with the particle size of 50nm according to a mass ratio of 4;
melting, mixing and granulating: mixing 20 parts of the modified nano photocatalyst and 100 parts of PET resin in a double-screw extruder, melting, extruding and granulating to obtain resin master batches;
fixing island to form fiber: respectively putting 100 parts of the resin master batch and 80 parts of COPET water-soluble resin into respective spinning material storage tanks, then putting the resin master batch and the COPET water-soluble resin into respective screw extruders to be heated, melted and extruded, then making the resin master batch and the COPET water-soluble resin pass through respective melt filters to form spinning melts, putting the spinning melts into a composite spinning assembly through a melt pipeline, and spraying the spinning melts out through a spinneret plate to form the sea-island structure composite figured fiber;
forming non-woven fabrics: drafting, curling, cutting, opening, carding, lapping, needling and ironing the fixed island fiber filaments to obtain non-woven fabrics;
forming suede leather: and (3) ironing the non-woven fabric, impregnating polyurethane resin, solidifying, washing, opening, raising, dyeing and post-treating to obtain the PET microfiber suede leather capable of reducing formaldehyde.
Example 2
The embodiment is used for explaining the PET microfiber suede leather capable of reducing formaldehyde and the preparation method thereof, and comprises the following steps:
and (3) nano photocatalyst surface treatment: preparing a silane coupling agent A-1110 into an aqueous solution, adjusting the pH value to be =4, adding a nano photocatalyst into the aqueous solution of the silane coupling agent, fully stirring, standing, precipitating and drying to obtain the modified nano photocatalyst, wherein the nano photocatalyst consists of anatase type nano titanium dioxide with the particle size of 15nm and nano tungsten disulfide with the particle size of 50nm according to a mass ratio of 1;
melting, mixing and granulating: mixing 5 parts of the modified nano photocatalyst and 100 parts of PET resin in a double-screw extruder, melting, extruding and granulating to obtain resin master batches;
fixing island to form fiber: respectively putting 100 parts of the resin master batch and 100 parts of COPET water-soluble resin into respective spinning material storage tanks, then feeding the resin master batch and the COPET water-soluble resin into respective screw extruders to be heated, melted and extruded, then feeding the obtained product into a composite spinning assembly through respective melt filters to form a spinning melt, feeding the spinning melt into the composite spinning assembly through a melt pipeline, and ejecting the spinning melt from a spinneret plate to form the sea-island structure composite figured fiber;
forming non-woven fabrics: drafting, curling, cutting, opening, carding, lapping, needling and ironing the fixed island fiber filaments to obtain non-woven fabrics;
forming suede leather: and (3) ironing the non-woven fabric, impregnating polyurethane resin, solidifying, washing, opening, raising, dyeing and post-treating to obtain the PET microfiber suede leather capable of reducing formaldehyde.
Example 3
The embodiment is used for explaining the PET microfiber suede leather capable of reducing formaldehyde and the preparation method thereof, and comprises the following steps:
and (3) nano photocatalyst surface treatment: preparing a silane coupling agent A-1100 and A-1110 into an aqueous solution according to the mass ratio of 1;
melting, mixing and granulating: mixing 10 parts of the modified nano photocatalyst and 100 parts of PET resin in a double-screw extruder, melting, extruding and granulating to obtain resin master batches;
fixing islands to form fibers: respectively putting 100 parts of the resin master batch and 40 parts of COPET water-soluble resin into respective spinning material storage tanks, then putting the resin master batch and the COPET water-soluble resin into respective screw extruders to be heated, melted and extruded, then making the resin master batch and the COPET water-soluble resin pass through respective melt filters to form spinning melts, putting the spinning melts into a composite spinning assembly through a melt pipeline, and spraying the spinning melts out through a spinneret plate to form the sea-island structure composite figured fiber;
forming non-woven fabrics: drafting, curling, cutting, opening, carding, lapping, needling and ironing the fixed island fiber filaments to obtain non-woven fabrics;
forming suede leather: and ironing the non-woven fabric, impregnating polyurethane resin, solidifying, washing, opening, raising, dyeing and post-treating to obtain the PET microfiber suede leather capable of reducing formaldehyde.
Example 4
The embodiment is used for explaining the PET microfiber suede leather capable of reducing formaldehyde and the preparation method thereof, and comprises the following steps:
and (3) nano photocatalyst surface treatment: preparing a silane coupling agent A-187 into an aqueous solution, adjusting the pH to =4, adding the nano photocatalyst into the aqueous solution of the silane coupling agent, fully stirring, standing, precipitating and drying to obtain the modified nano photocatalyst, wherein the nano photocatalyst consists of anatase type nano titanium dioxide with the particle size of 10nm and nano tin oxide with the particle size of 50nm according to the mass ratio of 5;
melting, mixing and granulating: mixing 1 part of the modified nano photocatalyst and 100 parts of PET resin in a double-screw extruder, melting, extruding and granulating to obtain resin master batches;
fixing island to form fiber: respectively putting 100 parts of the resin master batch and 130 parts of COPET water-soluble resin into respective spinning material storage tanks, then putting the resin master batch and the COPET water-soluble resin into respective screw extruders to be heated, melted and extruded, then making the resin master batch and the COPET water-soluble resin pass through respective melt filters to form spinning melts, putting the spinning melts into a composite spinning assembly through a melt pipeline, and spraying the spinning melts out through a spinneret plate to form the sea-island structure composite figured fiber;
forming non-woven fabrics: drafting, curling, cutting, opening, carding, lapping, needling and ironing the fixed island fiber filaments to obtain non-woven fabrics;
forming suede leather: and ironing the non-woven fabric, impregnating polyurethane resin, solidifying, washing, opening, raising, dyeing and post-treating to obtain the PET microfiber suede leather capable of reducing formaldehyde.
Example 5
The embodiment is used for explaining the PET microfiber suede leather capable of reducing formaldehyde and the preparation method thereof, and comprises the following steps:
and (3) nano photocatalyst surface treatment: preparing a silane coupling agent A-174 into an aqueous solution, adjusting the pH to =4, adding the nano photocatalyst into the aqueous solution of the silane coupling agent, fully stirring, standing, precipitating and drying to obtain the modified nano photocatalyst, wherein the nano photocatalyst consists of anatase type nano titanium dioxide with the particle size of 10nm and nano tungsten trioxide with the particle size of 40nm according to the mass ratio of 3;
melting, mixing and granulating: mixing 10 parts of the modified nano photocatalyst and 100 parts of PET resin in a double-screw extruder, melting, extruding and granulating to obtain resin master batches;
fixing islands to form fibers: respectively putting 100 parts of the resin master batch and 80 parts of COPET water-soluble resin into respective spinning material storage tanks, then putting the resin master batch and the COPET water-soluble resin into respective screw extruders to be heated, melted and extruded, then making the resin master batch and the COPET water-soluble resin pass through respective melt filters to form spinning melts, putting the spinning melts into a composite spinning assembly through a melt pipeline, and spraying the spinning melts out through a spinneret plate to form the sea-island structure composite figured fiber;
forming non-woven fabrics: drafting, curling, cutting, opening, carding, lapping, needling and ironing the fixed island fiber filaments to obtain non-woven fabrics;
forming suede leather: and (3) ironing the non-woven fabric, impregnating polyurethane resin, solidifying, washing, opening, raising, dyeing and post-treating to obtain the PET microfiber suede leather capable of reducing formaldehyde.
Comparative example 1
The comparative example is used for comparatively explaining the PET microfiber suede leather capable of reducing formaldehyde and the preparation method thereof, and only comprises the following steps:
fixing island to form fiber: respectively putting 100 parts of the resin master batch and 80 parts of COPET water-soluble resin into respective spinning material storage tanks, then putting the resin master batch and the COPET water-soluble resin into respective screw extruders to be heated, melted and extruded, then making the resin master batch and the COPET water-soluble resin pass through respective melt filters to form spinning melts, putting the spinning melts into a composite spinning assembly through a melt pipeline, and spraying the spinning melts out through a spinneret plate to form the sea-island structure composite figured fiber;
forming non-woven fabrics: drafting, curling, cutting, opening, carding, lapping, needling and ironing the fixed island fiber filaments to obtain non-woven fabrics;
forming suede leather: and (3) ironing the non-woven fabric, impregnating polyurethane resin, solidifying, washing, opening, raising, dyeing and post-treating to obtain the PET microfiber suede leather capable of reducing formaldehyde.
Comparative example 2
The comparative example is used for comparatively explaining the PET microfiber suede leather capable of reducing formaldehyde and the preparation method thereof, and only comprises the following steps:
melting, mixing and granulating: mixing 20 parts of nano photocatalyst and 100 parts of PET resin in a double-screw extruder, melting, extruding and granulating to obtain resin master batches, wherein the nano photocatalyst consists of anatase type nano titanium dioxide with the particle size of 10nm and nano molybdenum disulfide with the particle size of 50nm according to the mass ratio of 4;
fixing islands to form fibers: respectively putting 100 parts of the resin master batch and 80 parts of COPET water-soluble resin into respective spinning material storage tanks, then putting the resin master batch and the COPET water-soluble resin into respective screw extruders to be heated, melted and extruded, then making the resin master batch and the COPET water-soluble resin pass through respective melt filters to form spinning melts, putting the spinning melts into a composite spinning assembly through a melt pipeline, and spraying the spinning melts out through a spinneret plate to form the sea-island structure composite figured fiber;
forming non-woven fabrics: the figured island fiber is subjected to drafting, curling, cutting, opening, carding, lapping, needling and ironing to prepare non-woven fabric;
forming suede leather: and ironing the non-woven fabric, impregnating polyurethane resin, solidifying, washing, opening, raising, dyeing and post-treating to obtain the PET microfiber suede leather capable of reducing formaldehyde.
Comparative example 3
The comparative example is used for comparatively explaining the PET microfiber suede leather capable of reducing formaldehyde and the preparation method thereof, which are disclosed by the invention, and comprises the following steps:
and (3) nano photocatalyst surface treatment: preparing a silane coupling agent A-189 into an aqueous solution, adjusting the pH to =4, adding the nano photocatalyst into the aqueous solution of the silane coupling agent, fully stirring, standing, precipitating and drying to obtain the modified nano photocatalyst, wherein the nano photocatalyst consists of anatase type nano titanium dioxide with the particle size of 10nm and nano molybdenum disulfide with the particle size of 50nm according to a mass ratio of 4;
melting, mixing and granulating: mixing, melting, extruding and granulating 20 parts of the modified nano photocatalyst and 100 parts of PET resin in a double-screw extruder to obtain resin master batches;
fixing islands to form fibers: respectively putting 100 parts of the resin master batch and 80 parts of COPET water-soluble resin into respective spinning material storage tanks, then putting the resin master batch and the COPET water-soluble resin into respective screw extruders to be heated, melted and extruded, then making the resin master batch and the COPET water-soluble resin pass through respective melt filters to form spinning melts, putting the spinning melts into a composite spinning assembly through a melt pipeline, and spraying the spinning melts out through a spinneret plate to form the sea-island structure composite figured fiber;
forming non-woven fabrics: the figured island fiber is subjected to drafting, curling, cutting, opening, carding, lapping, needling and ironing to prepare non-woven fabric;
forming suede leather: and ironing the non-woven fabric, impregnating polyurethane resin, solidifying, washing, opening, raising, dyeing and post-treating to obtain the PET microfiber suede leather capable of reducing formaldehyde.
Comparative example 4
The comparative example is used for comparatively explaining the PET microfiber suede leather capable of reducing formaldehyde and the preparation method thereof, which are disclosed by the invention, and comprises the following steps:
fixing islands to form fibers: respectively putting 100 parts of the resin master batch and 80 parts of COPET water-soluble resin into respective spinning storage tanks, then feeding the resin master batch and the COPET water-soluble resin into respective screw extruders to be heated and melted and extruded, then feeding the resin master batch and the COPET water-soluble resin into respective melt filters to form spinning melts, feeding the spinning melts into a composite spinning assembly through a melt pipeline, and spraying the spinning melts from a spinneret plate to form the sea-island structure composite figured fiber;
forming non-woven fabrics: drafting, curling, cutting, opening, carding, lapping, needling and ironing the fixed island fiber filaments to obtain non-woven fabrics;
forming suede leather: and ironing the non-woven fabric, impregnating polyurethane resin, solidifying, washing, opening, raising, dyeing and post-treating to obtain the PET microfiber suede leather capable of reducing formaldehyde.
Preparing a post-treatment liquid: preparing a silane coupling agent A-1100 into an aqueous solution, adjusting the pH to =4, adding a nano photocatalyst into the aqueous solution of the silane coupling agent, fully stirring, and standing to obtain an aftertreatment solution, wherein the nano photocatalyst consists of anatase type nano titanium dioxide with the particle size of 10nm and nano molybdenum disulfide with the particle size of 50nm according to a mass ratio of 4;
post-treatment of suede leather: and soaking the nylon microfiber suede leather into the post-treatment liquid, standing for 24h, drying, and reducing formaldehyde.
Comparative example 5
This comparative example is used for comparative illustration of the disclosed formaldehyde-reducing PET microfiber suede leather and the method for making the same, and includes most of the operations of example 1, except that:
the conventional PET spinning process is used for replacing the fixed island fiber forming process in the embodiment 1, and the processes of needling, ironing, polyurethane resin impregnation, solidification, washing, napping, dyeing and post-treatment are carried out without adding COPET.
Note: the raw materials used in the above examples and comparative examples include:
PET resin: transparent polyester chips of Jiangsu Zhengji chemical fiber company Limited, the intrinsic viscosity (0.662 +/-0.01) dL/g and the melting point are 250-260 ℃;
COPET Water-soluble resin: a water-soluble polyester chip of Japan Bell textile, the inherent viscosity (0.682 +/-0.01) dL/g and the melting point of 249-252 ℃;
a polyurethane resin: manufactured by Shanghai Vigorskies Technique, inc.;
anatase type nano titanium dioxide: anatase type nano titanium oxide (5 nm, 10nm, 15 nm) is produced by Beijing Deke island gold technologies Co., ltd, and anatase type nano titanium oxide of other particle sizes can be prepared by the method disclosed in patent No. 200910060703.2.
Catalyst promoter: 5nm nanometer cadmium sulfide, 50nm nanometer molybdenum disulfide, 50nm nanometer tungsten disulfide, 40nm nanometer tungsten trioxide and 50nm nanometer tin oxide are all produced by Beijing Deke island gold science and technology Limited.
Performance test
The formaldehyde-reducing microfiber suede leathers prepared in examples 1-5 and comparative examples 1-5 were subjected to the following performance tests:
formaldehyde reduction performance: cutting a microfiber suede leather sample into 10cm by adopting a 10L bag according to EQL-101, extracting gas in the bag to detect the formaldehyde content (sample A) under the treatment condition of 65 ℃/2h in an environmental chamber, then placing the test bag sealed with the suede leather under the outdoor natural illumination condition for 24h, and sampling again to detect the formaldehyde content (sample B) in the bag. Formaldehyde analysis equipment: shimadzu LC-20A high performance liquid chromatograph.
The test results are filled in table 1.
TABLE 1
According to the test results in table 1, it can be seen that the formaldehyde reduction rate of the PET microfiber suede leather containing the modified nano-photocatalyst prepared by the preparation method provided by the application in examples 1-5 in 24 hours can reach more than 48%, and compared with the suede leather prepared by the comparative example 1 without adding the nano-photocatalyst, the formaldehyde reduction effect is greatly improved;
the test results of the comparative example 2 and the example 1 are combined to show that the comparative example 2 does not adopt the silane coupling agent to carry out surface modification on the nano photocatalyst, and the formaldehyde reduction rate is only 22 percent, which indicates that the silane coupling agent adopted to carry out surface modification on the nano photocatalyst can improve the dispersion degree of the nano photocatalyst and the binding force between the nano photocatalyst and PET, and further improve the formaldehyde reduction effect of the suede leather;
the test results of the comparative example 3 and the example 1 are combined to show that the silane coupling agent A-189 (gamma-mercaptopropyl trimethoxy silane) adopted in the comparative example 3 has poor compatibility with PET resin, and the formaldehyde reduction rate is only 14%, which indicates that the dispersion uniformity of the nano photocatalyst in the PET resin is further improved and the formaldehyde reduction effect can be remarkably improved by selecting the silane coupling agent more suitable for the PET resin system of the application;
the test results of the comparative example 4 and the example 1 are combined, so that compared with the mode that the nano photocatalyst and the PET resin are subjected to melt blending granulation in the comparative example 4, the nano photocatalyst is attached to the surface of the microfiber suede leather in the existing impregnation mode, the formaldehyde reduction effect and the durability of the nanofiber suede leather are greatly improved.
The test results of the comparison example 5 and the example 1 are combined, so that the application ingeniously utilizes the chinampa spinning process, compared with the direct spinning process of the comparison example 5, the fiber size is thinner, the specific surface area of the photocatalyst in contact with air is greatly improved, the formaldehyde reducing effect is obviously improved, and the suede leather has better hand feeling.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A preparation method of PET microfiber suede leather for reducing formaldehyde is characterized by comprising the following steps:
and (3) nano photocatalyst surface treatment: mixing and drying a silane coupling agent and a nano photocatalyst to obtain a modified nano photocatalyst, wherein the nano photocatalyst comprises a photocatalyst and a photocatalyst promoter;
melting, mixing and granulating: carrying out melt extrusion granulation on the modified nano photocatalyst and PET resin to obtain resin master batches;
fixing islands to form fibers: respectively melting and respectively extruding the resin master batch and the COPET water-soluble resin, and then preparing the figured fiber yarns by a figured spinning process;
forming non-woven fabrics: preparing the figured island fiber yarns into non-woven fabrics by a needling process;
forming suede leather: and (3) ironing the non-woven fabric, impregnating polyurethane resin, solidifying, washing, opening, raising, dyeing and post-treating to obtain the PET microfiber suede leather capable of reducing formaldehyde.
2. The method for preparing PET microfiber suede for reducing formaldehyde according to claim 1, wherein the photocatalyst comprises anatase type nano titanium dioxide.
3. The method for preparing the PET microfiber suede leather capable of reducing formaldehyde according to claim 1, wherein the photocatalytic promoter comprises at least one of molybdenum disulfide, tungsten disulfide, zinc sulfide, cadmium selenide, tin oxide and tungsten oxide.
4. The preparation method of the PET microfiber suede leather capable of reducing formaldehyde according to claim 1, wherein the mass ratio of the photocatalyst to the photocatalyst promoter is (1-10): 1.
5. the method for preparing the PET microfiber suede leather capable of reducing formaldehyde according to claim 1, wherein the particle size of the photocatalyst is 5nm to 300nm;
the grain size of the photocatalytic promoter is 5 nm-50 nm.
6. The method for preparing the formaldehyde-reducing PET microfiber suede leather according to claim 1, wherein the silane coupling agent comprises at least one of A-1100, A-1110, A-187, A-174 and A-172.
7. The method for preparing the PET microfiber suede leather capable of reducing formaldehyde as claimed in claim 1, wherein in the step of surface treatment with the nano photocatalyst, the mass ratio of the silane coupling agent to the nano photocatalyst is 0.1-1.5%.
8. The method for preparing the PET microfiber suede leather capable of reducing formaldehyde according to claim 1, wherein in the step of melting, mixing and granulating, the raw materials comprise 1-25 parts by weight of modified nano photocatalyst and 100 parts by weight of PET resin.
9. The method for preparing PET microfiber suede leather with effect of reducing formaldehyde as claimed in claim 1, wherein in the step of "fixed island fiber formation", the raw materials comprise, by weight, 100 parts of resin master batch and 40-130 parts of COPET water-soluble resin.
10. A PET microfiber suede, characterized in that it is prepared by the method of any one of claims 1 to 9.
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Application publication date: 20221108 |