CN113186732A - Process for treating dry-process PU synthetic leather for wet-process recycling - Google Patents
Process for treating dry-process PU synthetic leather for wet-process recycling Download PDFInfo
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- CN113186732A CN113186732A CN202110399057.3A CN202110399057A CN113186732A CN 113186732 A CN113186732 A CN 113186732A CN 202110399057 A CN202110399057 A CN 202110399057A CN 113186732 A CN113186732 A CN 113186732A
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- slurry
- wet
- synthetic leather
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Links
- 238000000034 method Methods 0.000 title claims abstract description 72
- 239000002649 leather substitute Substances 0.000 title claims abstract description 36
- 238000001035 drying Methods 0.000 title claims abstract description 25
- 238000004064 recycling Methods 0.000 title claims abstract description 23
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 66
- 239000002002 slurry Substances 0.000 claims abstract description 62
- 239000002699 waste material Substances 0.000 claims abstract description 59
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims abstract description 39
- 238000001914 filtration Methods 0.000 claims abstract description 38
- 229910052742 iron Inorganic materials 0.000 claims abstract description 33
- 239000000463 material Substances 0.000 claims abstract description 30
- 238000004519 manufacturing process Methods 0.000 claims abstract description 16
- 239000012046 mixed solvent Substances 0.000 claims abstract description 15
- 239000002245 particle Substances 0.000 claims abstract description 13
- 238000005406 washing Methods 0.000 claims abstract description 13
- 239000012535 impurity Substances 0.000 claims abstract description 11
- 239000007787 solid Substances 0.000 claims abstract description 9
- 238000004140 cleaning Methods 0.000 claims abstract description 8
- 238000010438 heat treatment Methods 0.000 claims abstract description 7
- 238000002791 soaking Methods 0.000 claims abstract description 7
- 238000003756 stirring Methods 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 7
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 36
- 238000001179 sorption measurement Methods 0.000 claims description 14
- 239000002904 solvent Substances 0.000 claims description 11
- 239000002808 molecular sieve Substances 0.000 claims description 8
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims description 8
- 239000004677 Nylon Substances 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 6
- 229920001778 nylon Polymers 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- 239000011343 solid material Substances 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 6
- 239000002244 precipitate Substances 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 238000004090 dissolution Methods 0.000 description 3
- 239000013049 sediment Substances 0.000 description 3
- 230000003749 cleanliness Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002994 raw material Substances 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
- D06N3/12—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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D36/00—Filter circuits or combinations of filters with other separating devices
- B01D36/003—Filters in combination with devices for the removal of liquids
- B01D36/006—Purge means
-
- 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
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Processing Of Solid Wastes (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
Abstract
The invention discloses a process for treating dry-method PU synthetic leather for wet-method recycling, which comprises the steps of P1, collecting waste materials generated in a dry-method PU synthetic leather production line, soaking the waste materials in clean water and then washing the waste materials to obtain cleaning waste materials; p2, drying the cleaning waste in a hot air box to obtain dried waste; p3, putting the dried waste into a pulverizer to cut and pulverize to obtain a pulverized material; p4, removing iron from the crushed material by using an iron remover, and removing iron scrap impurities to obtain an impurity-removed material; p5, putting the impurity-removed materials into the mixed solvent according to a ratio, heating to 35-50 ℃, uniformly stirring for 15-30 minutes, and filtering to prepare PU slurry after solid particles are completely dissolved; p6, putting the PU slurry into a closed container, adding dimethylformamide, adjusting the concentration to 60% -65%, preparing an adjusting slurry, conveying the adjusting slurry to a wet-process PU synthetic leather production line, ensuring the safety and stability of wet-process recycling, and being beneficial to popularization and use.
Description
Technical Field
The invention relates to the technical field of PU synthetic leather, in particular to a process for treating dry-process PU synthetic leather for wet-process recycling.
Background
In the production and processing process of the PU synthetic leather, the two modes of a dry method and a wet method are adopted, and in the processing of a dry method production line, large-area waste materials are easily generated due to process limitation, cannot be used for the dry method processing of the next step, and can cause waste due to direct discarding, so that a process needs to be provided, and the dry method waste materials are subjected to secondary processing and then are used for wet method processing, so that the cost is reduced.
However, most of the existing treatment processes are directly and easily dissolved to form slurry, so that the dissolution effect is affected by a single solvent, the efficiency is low, the produced slurry is mixed in an angle, the removal treatment is not easy, and the wet processing raw materials are easily polluted to reduce the quality, so that a new process method needs to be removed.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a process for treating dry PU synthetic leather for wet recycling.
In order to achieve the purpose, the invention adopts the following technical scheme:
a process for treating dry PU synthetic leather for wet recycling comprises the following steps:
p1, collecting waste materials generated in the dry-method PU synthetic leather production line, soaking the waste materials in clean water, and then washing the waste materials to obtain washing waste materials;
p2, drying the cleaning waste in a hot air box to obtain dried waste;
p3, putting the dried waste into a pulverizer to cut and pulverize to obtain a pulverized material;
p4, removing iron from the crushed material by using an iron remover, and removing iron scrap impurities to obtain an impurity-removed material;
p5, putting the impurity-removed materials into the mixed solvent according to a ratio, heating to 35-50 ℃, uniformly stirring for 15-30 minutes, and filtering to prepare PU slurry after solid particles are completely dissolved;
and P6, putting the PU slurry into a closed container, adding dimethylformamide, adjusting the concentration to 60-65%, preparing an adjusting slurry, and conveying the adjusting slurry to a wet-process PU synthetic leather production line.
Preferably, the waste collected in the step P1 includes rejects and trimmed scrap in a dry line.
Preferably, the drying temperature of the step P2 is not 40 to 45 ℃, the air volume is 25 to 30 liters per second, and the duration is 20 to 40 minutes.
Preferably, the cutting and crushing of the P3 step are carried out by gauze filtration, and the particle size is kept between 1 mm and 2.2 mm.
Preferably, the P4 step adopts an electromagnet to remove iron, and the iron is filtered by a nylon screen.
Preferably, the mixed solvent of the step P5 comprises 70-80% of dimethylformamide and 20-35% of ethanol.
Preferably, the filtering method in the step P5 comprises the following steps:
s1, passing the dissolved slurry through a 200-220 mesh gauze, and filtering to remove precipitates and floating substances to obtain filtered slurry;
s2, putting the filtered slurry into an ethanol molecular sieve treatment box, performing molecular adsorption filtration, and removing doped ethanol to obtain adsorption slurry;
and S3, putting the molecular slurry into a container, sealing and standing for 4 to 8 hours to finish filtering.
Preferably, the proportion of the P5 step is 1:1.2-1.5 by weight of solid material and solvent.
According to the process for treating the dry-process PU synthetic leather for recycling by the wet process, provided by the invention, waste materials are cleaned and dried to effectively remove redundant impurities, then crushed and filtered by adopting a mixed solvent, the molecular distance of the solvent is increased, the dissolution of the material is accelerated, then solid impurities are removed by combining with the filtration of a gauze, and the redundant solvent is removed by adsorption through a molecular sieve, so that the cleanliness of slurry is ensured, the treatment efficiency is improved, the safety and stability of wet-process recycling are ensured, and the process is favorable for popularization and use.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
A process for treating dry PU synthetic leather for wet recycling comprises the following steps:
p1, collecting waste materials generated in the dry-method PU synthetic leather production line, soaking the waste materials in clean water, and then washing the waste materials to obtain washing waste materials;
p2, drying the cleaning waste in a hot air box to obtain dried waste;
p3, putting the dried waste into a pulverizer to cut and pulverize to obtain a pulverized material;
p4, removing iron from the crushed material by using an iron remover, and removing iron scrap impurities to obtain an impurity-removed material;
p5, putting the impurity-removed materials into the mixed solvent according to a ratio, heating to 35-50 ℃, uniformly stirring for 15-30 minutes, and filtering to prepare PU slurry after solid particles are completely dissolved;
and P6, putting the PU slurry into a closed container, adding dimethylformamide, adjusting the concentration to 60-65%, preparing an adjusting slurry, and conveying the adjusting slurry to a wet-process PU synthetic leather production line.
Preferably, the waste collected in the step P1 includes rejects and trimmed scrap in a dry line.
Preferably, the drying temperature of the step P2 is not 40 to 45 ℃, the air volume is 25 to 30 liters per second, and the duration is 20 to 40 minutes.
Preferably, the cutting and crushing in the step P3 are carried out by gauze filtration, and the particle size is kept between 1 mm and 2.2 mm.
Preferably, the P4 step adopts an electromagnet to remove iron, and the iron is filtered by a nylon screen.
Preferably, the mixed solvent of the step P5 comprises 70% -80% of dimethylformamide and 20% -35% of ethanol.
Preferably, the filtering method in the step P5 comprises the following steps:
s1, passing the dissolved slurry through a 200-220 mesh gauze, and filtering to remove precipitates and floating substances to obtain filtered slurry;
s2, putting the filtered slurry into an ethanol molecular sieve treatment box, performing molecular adsorption filtration, and removing doped ethanol to obtain adsorption slurry;
and S3, putting the molecular slurry into a container, sealing and standing for 4 to 8 hours to finish filtering.
Preferably, the proportion of the P5 step is 1:1.2-1.5 by weight of solid material and solvent.
According to the process for treating the dry-process PU synthetic leather for recycling by the wet process, provided by the invention, waste materials are cleaned and dried to effectively remove redundant impurities, then crushed and filtered by adopting a mixed solvent, the molecular distance of the solvent is increased, the dissolution of the material is accelerated, then solid impurities are removed by combining with the filtration of a gauze, and the redundant solvent is removed by adsorption through a molecular sieve, so that the cleanliness of slurry is ensured, the treatment efficiency is improved, the safety and stability of wet-process recycling are ensured, and the process is favorable for popularization and use.
Example 1
A process for treating dry PU synthetic leather for wet recycling comprises the following steps:
p1, collecting waste materials generated in the dry-method PU synthetic leather production line, soaking the waste materials in clean water, and then washing the waste materials to obtain washing waste materials;
p2, drying the cleaning waste in a hot air box to obtain dried waste;
p3, putting the dried waste into a pulverizer to cut and pulverize to obtain a pulverized material;
p4, removing iron from the crushed material by using an iron remover, and removing iron scrap impurities to obtain an impurity-removed material;
p5, putting the impurity-removed materials into the mixed solvent according to a ratio, heating to 35-50 ℃, uniformly stirring for 15-30 minutes, and filtering to prepare PU slurry after solid particles are completely dissolved;
and P6, putting the PU slurry into a closed container, adding dimethylformamide, adjusting the concentration to 62%, preparing an adjusting slurry, and conveying the adjusting slurry to a wet-process PU synthetic leather production line.
Preferably, the waste collected in the step P1 includes rejects and trimmed scrap in a dry line.
Preferably, the drying temperature of the step P2 is not 40 to 45 ℃, the air volume is 25 to 30 liters per second, and the duration is 20 to 40 minutes.
Preferably, the cutting and crushing in the step P3 are carried out by gauze filtration, and the particle size is kept between 1 mm and 2.2 mm.
Preferably, the P4 step adopts an electromagnet to remove iron, and the iron is filtered by a nylon screen.
Preferably, the mixed solvent of the P5 step includes 80% of dimethylformamide and 20% of ethanol.
Preferably, the filtering method in the step P5 comprises the following steps:
s1, passing the dissolved slurry through a 210-mesh gauze, and filtering to remove sediments and floating substances to obtain filtered slurry;
s2, putting the filtered slurry into an ethanol molecular sieve treatment box, performing molecular adsorption filtration, and removing doped ethanol to obtain adsorption slurry;
and S3, putting the molecular slurry into a container, sealing and standing for 4 to 8 hours to finish filtering.
Preferably, the proportion of the P5 step is 1:1.2 by weight of solid material and solvent.
Example 2
A process for treating dry PU synthetic leather for wet recycling comprises the following steps:
p1, collecting waste materials generated in the dry-method PU synthetic leather production line, soaking the waste materials in clean water, and then washing the waste materials to obtain washing waste materials;
p2, drying the cleaning waste in a hot air box to obtain dried waste;
p3, putting the dried waste into a pulverizer to cut and pulverize to obtain a pulverized material;
p4, removing iron from the crushed material by using an iron remover, and removing iron scrap impurities to obtain an impurity-removed material;
p5, putting the impurity-removed materials into the mixed solvent according to a ratio, heating to 35-50 ℃, uniformly stirring for 15-30 minutes, and filtering to prepare PU slurry after solid particles are completely dissolved;
and P6, putting the PU slurry into a closed container, adding dimethylformamide, adjusting the concentration to 65%, preparing an adjusting slurry, and conveying the adjusting slurry to a wet-process PU synthetic leather production line.
Preferably, the waste collected in the step P1 includes rejects and trimmed scrap in a dry line.
Preferably, the drying temperature of the step P2 is not 40 to 45 ℃, the air volume is 25 to 30 liters per second, and the duration is 20 to 40 minutes.
Preferably, the cutting and crushing in the step P3 are carried out by gauze filtration, and the particle size is kept between 1 mm and 2.2 mm.
Preferably, the P4 step adopts an electromagnet to remove iron, and the iron is filtered by a nylon screen.
Preferably, the mixed solvent of the P5 step includes dimethylformamide 76 and ethanol 24%.
Preferably, the filtering method in the step P5 comprises the following steps:
s1, passing the dissolved slurry through a 220-mesh gauze, and filtering to remove sediments and floating substances to obtain filtered slurry;
s2, putting the filtered slurry into an ethanol molecular sieve treatment box, performing molecular adsorption filtration, and removing doped ethanol to obtain adsorption slurry;
and S3, putting the molecular slurry into a container, sealing and standing for 4 to 8 hours to finish filtering.
Preferably, the proportion of the P5 step is 1:1.3 by weight of solid material and solvent.
Example 3
A process for treating dry PU synthetic leather for wet recycling comprises the following steps:
p1, collecting waste materials generated in the dry-method PU synthetic leather production line, soaking the waste materials in clean water, and then washing the waste materials to obtain washing waste materials;
p2, drying the cleaning waste in a hot air box to obtain dried waste;
p3, putting the dried waste into a pulverizer to cut and pulverize to obtain a pulverized material;
p4, removing iron from the crushed material by using an iron remover, and removing iron scrap impurities to obtain an impurity-removed material;
p5, putting the impurity-removed materials into the mixed solvent according to a ratio, heating to 35-50 ℃, uniformly stirring for 15-30 minutes, and filtering to prepare PU slurry after solid particles are completely dissolved;
and P6, putting the PU slurry into a closed container, adding dimethylformamide, adjusting the concentration to 60 percent to prepare an adjusting slurry, and conveying the adjusting slurry to a wet-process PU synthetic leather production line.
Preferably, the waste collected in the step P1 includes rejects and trimmed scrap in a dry line.
Preferably, the drying temperature of the step P2 is not 40 to 45 ℃, the air volume is 25 to 30 liters per second, and the duration is 20 to 40 minutes.
Preferably, the cutting and crushing in the step P3 are carried out by gauze filtration, and the particle size is kept between 1 mm and 2.2 mm.
Preferably, the P4 step adopts an electromagnet to remove iron, and the iron is filtered by a nylon screen.
Preferably, the mixed solvent of the P5 step includes 70% of dimethylformamide and 30% of ethanol.
Preferably, the filtering method in the step P5 comprises the following steps:
s1, passing the dissolved slurry through a 200-mesh gauze, and filtering to remove sediments and floating substances to obtain filtered slurry;
s2, putting the filtered slurry into an ethanol molecular sieve treatment box, performing molecular adsorption filtration, and removing doped ethanol to obtain adsorption slurry;
and S3, putting the molecular slurry into a container, sealing and standing for 4 to 8 hours to finish filtering.
Preferably, the proportion of the P5 step is 1:1.5 by weight of solid material and solvent.
Claims (8)
1. A process for treating dry PU synthetic leather for wet recycling is characterized in that: the process comprises the following steps:
p1, collecting waste materials generated in the dry-method PU synthetic leather production line, soaking the waste materials in clean water, and then washing the waste materials to obtain washing waste materials;
p2, drying the cleaning waste in a hot air box to obtain dried waste;
p3, putting the dried waste into a pulverizer to cut and pulverize to obtain a pulverized material;
p4, removing iron from the crushed material by using an iron remover, and removing iron scrap impurities to obtain an impurity-removed material;
p5, putting the impurity-removed materials into the mixed solvent according to a ratio, heating to 35-50 ℃, uniformly stirring for 15-30 minutes, and filtering to prepare PU slurry after solid particles are completely dissolved;
and P6, putting the PU slurry into a closed container, adding dimethylformamide, adjusting the concentration to 60-65%, preparing an adjusting slurry, and conveying the adjusting slurry to a wet-process PU synthetic leather production line.
2. The process of claim 1 for treating dry-process PU synthetic leather for wet-process recycling, characterized in that: the scrap collected in the P1 step includes rejects and trim scrap on the dry line.
3. The process of claim 1 for treating dry-process PU synthetic leather for wet-process recycling, characterized in that: the drying temperature of the step P2 is not 40-45 ℃, the air quantity is 25-30 liters per second, and the duration time is 20-40 minutes.
4. The process of claim 1 for treating dry-process PU synthetic leather for wet-process recycling, characterized in that: the cutting and crushing of the P3 step are filtered by gauze, and the particle size is kept between 1 mm and 2.2 mm.
5. The process of claim 1 for treating dry-process PU synthetic leather for wet-process recycling, characterized in that: and in the step P4, iron is removed by adopting an electromagnet, and the iron is filtered by a nylon screen.
6. The process of claim 1 for treating dry-process PU synthetic leather for wet-process recycling, characterized in that: the mixed solvent of the step P5 comprises 70-80% of dimethylformamide and 20-35% of ethanol.
7. The process of claim 1 for treating dry-process PU synthetic leather for wet-process recycling, characterized in that: the filtering method of the P5 step comprises the following steps:
s1, passing the dissolved slurry through a 200-220 mesh gauze, and filtering to remove precipitates and floating substances to obtain filtered slurry;
s2, putting the filtered slurry into an ethanol molecular sieve treatment box, performing molecular adsorption filtration, and removing doped ethanol to obtain adsorption slurry;
and S3, putting the molecular slurry into a container, sealing and standing for 4 to 8 hours to finish filtering.
8. The process of claim 1 for treating dry-process PU synthetic leather for wet-process recycling, characterized in that: the proportion of the solid material weight and the solvent weight in the step P5 is 1: 1.2-1.5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110399057.3A CN113186732A (en) | 2021-04-14 | 2021-04-14 | Process for treating dry-process PU synthetic leather for wet-process recycling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110399057.3A CN113186732A (en) | 2021-04-14 | 2021-04-14 | Process for treating dry-process PU synthetic leather for wet-process recycling |
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| Publication Number | Publication Date |
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| CN113186732A true CN113186732A (en) | 2021-07-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN202110399057.3A Pending CN113186732A (en) | 2021-04-14 | 2021-04-14 | Process for treating dry-process PU synthetic leather for wet-process recycling |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114226409A (en) * | 2021-12-08 | 2022-03-25 | 江苏安卡新材料科技有限公司 | Fiber recovery process |
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| CN101135114A (en) * | 2007-10-12 | 2008-03-05 | 华伦皮塑（苏州）有限公司 | Synthetic leather dry process PU slurry and preparation method thereof |
| KR100974450B1 (en) * | 2009-03-27 | 2010-08-06 | 주식회사 넥스텍 | Method for preparing artificial leather using recycled polyurethane waste and method of preparing recycled polyurethane resin for artificial leather |
| CN103374145A (en) * | 2013-03-21 | 2013-10-30 | 佛山市高明区业晟聚氨酯有限公司 | Recovery process of polyurethane waste |
| CN106832878A (en) * | 2016-12-30 | 2017-06-13 | 嘉兴学院 | A kind of dyeing polyurethane resin and its application in synthetic leather |
| CN107399027A (en) * | 2017-07-18 | 2017-11-28 | 安徽安利材料科技股份有限公司 | A kind of technique for recycling the processing of dry method PU synthetic leather for wet method |
| CN112575594A (en) * | 2020-11-25 | 2021-03-30 | 林振明 | Functional solvent and polyurethane slurry for dry preparation process of PU synthetic leather |
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2021
- 2021-04-14 CN CN202110399057.3A patent/CN113186732A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101135114A (en) * | 2007-10-12 | 2008-03-05 | 华伦皮塑（苏州）有限公司 | Synthetic leather dry process PU slurry and preparation method thereof |
| KR100974450B1 (en) * | 2009-03-27 | 2010-08-06 | 주식회사 넥스텍 | Method for preparing artificial leather using recycled polyurethane waste and method of preparing recycled polyurethane resin for artificial leather |
| CN103374145A (en) * | 2013-03-21 | 2013-10-30 | 佛山市高明区业晟聚氨酯有限公司 | Recovery process of polyurethane waste |
| CN106832878A (en) * | 2016-12-30 | 2017-06-13 | 嘉兴学院 | A kind of dyeing polyurethane resin and its application in synthetic leather |
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| CN112575594A (en) * | 2020-11-25 | 2021-03-30 | 林振明 | Functional solvent and polyurethane slurry for dry preparation process of PU synthetic leather |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114226409A (en) * | 2021-12-08 | 2022-03-25 | 江苏安卡新材料科技有限公司 | Fiber recovery process |
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Application publication date: 20210730 |