CN102286886A - Method for recycling polyurethane buffed detritus - Google Patents
Method for recycling polyurethane buffed detritus Download PDFInfo
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- CN102286886A CN102286886A CN2011101999705A CN201110199970A CN102286886A CN 102286886 A CN102286886 A CN 102286886A CN 2011101999705 A CN2011101999705 A CN 2011101999705A CN 201110199970 A CN201110199970 A CN 201110199970A CN 102286886 A CN102286886 A CN 102286886A
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- polyurethane
- base cloth
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- detritus
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
- Y02P70/62—Manufacturing or production processes characterised by the final manufactured product related technologies for production or treatment of textile or flexible materials or products thereof, including footwear
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- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
- Synthetic Leather, Interior Materials Or Flexible Sheet Materials (AREA)
Abstract
The invention relates to a method for recycling polyurethane buffed detritus, which is characterized by comprising the following steps: (1), the polyurethane buffed detritus is screened by a vibration screening filter to make the polyurethane detritus separate from fiber fluff; (2), N, N-dimethylformamide is added into the polyurethane detritus to be uniformly mixed to obtain mixed liquid; (3), ground cloth is padded in the mixed liquid, wherein the distance between rollers is 0.75 to 1.2mm; and the padded ground cloth is soaked in the N, N-dimetbylformamide water solution to make the polyurethane on the surface of the ground cloth solidify, wherein the solidification temperature is 30 to 45 DEG C and the solidification time is 5 to 10 minutes; (4), the ground cloth treated in Step (3) is rinsed in a rinsing bowl, wherein the rinsing temperature is 45 to 60 DEG C, and the speed of the ground cloth is 10 to 20 m/min; and (5), the rinsed ground cloth is dried for 2 to 5 minutes at the temperature of 130 to 150 DEG C to obtain a polyurethane leather semi-finished product. By the method for recycling the polyurethane buffed detritus, polyurethane stock can be recycled for the production of polyurethane synthetic leather, so that resources are effectively utilized.
Description
Technical field
The present invention relates to a kind of reuse method of polyurethane mill skin chip, belong to the leather production technical field.
Background technology
The processing of polyurethane mill skin is an important procedure in the arrangement of artificial leather synthetic leather, it is that the synthetic leather semi-finished product are under certain tension force, with the abrasive band of certain speed by operation, after contact friction, the part polyurethane of surface of semi-finished compacted zone is ground away, make surperficial one deck down, when it gives artificial leather synthetic leather high added value, produce and brought a large amount of polyurethane mill skin chips in the processing again, these mill skin chips (include polyurethane resin owing to contain polyurethane slurry, filler, colouring agent, auxiliary agent etc.) and a small amount of terylene, polyamide fibre, blend fibre fine hair such as cotton, the ratio of polyurethane slurry and blend fibre fine hair is approximately 1:1, because composition relative complex, deal with the comparison difficulty, so its processing generally is the production that is used for floor etc. as additive, utilization ratio is lower, or through burying, burn processing, this has not only caused huge pollution to environment, and has caused the serious waste of resource.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of reuse method of polyurethane mill skin chip is provided, blend fibre fine hair and polyurethane slurry are effectively separated, thereby make polyurethane slurry continue to be back to the production of Synthetic Leather, effectively utilized resource.
According to technical scheme provided by the invention, the reuse method of described polyurethane mill skin chip, feature is to comprise following processing step:
(1) polyurethane being ground the skin chip sieves through the vibrosieve filter, the polyurethane chip is separated with fibre fluff, the described vibrosieve filter order number of screen cloth at the middle and upper levels is 20 ~ 60 orders, the order number of lower screen is 100 ~ 120 orders, temperature during screening is 80 ~ 120 ℃, and the screening time is 5 ~ 10 minutes;
(2) add N in the polyurethane chip, dinethylformamide mixes and obtains mixed liquor, and described polyurethane chip and N, the mass ratio of dinethylformamide are 2:5 ~ 7;
(3) base cloth one soaks one and rolls mixed liquor, and the distance between the roll is 0.75 ~ 1.2mm; Base cloth after padding is immersed in N, and the polyurethane on base cloth surface is solidified, and setting temperature is that 30 ~ 45 ℃, time are 5 ~ 10 minutes;
(4) base cloth after step (3) processing is washed in rinsing bowl, washing temperature is 45 ~ 60 ℃, and the speed of a motor vehicle of base cloth is 10 ~ 20 meters/minute;
(5) base cloth after will washing was dried under 130 ~ 150 ℃ condition 2 ~ 5 minutes, promptly made the polyurethane leather semi-finished product.
Described N, the mass percentage concentration of the dinethylformamide aqueous solution is 18% ~ 20%.
Method of the present invention is effectively separated blend fibre fine hair and polyurethane slurry, thereby makes polyurethane slurry continue to be back to the production of Synthetic Leather, has effectively utilized resource, and this method technological process is simple, less input, and economic benefit is higher, is fit to suitability for industrialized production.
The specific embodiment
The invention will be further described below in conjunction with specific embodiment.
Embodiment one: a kind of reuse method of polyurethane mill skin chip comprises following processing step:
(1) polyurethane being ground the skin chip sieves through the vibrosieve filter, the polyurethane chip is separated with fibre fluff, and the described vibrosieve filter order number of screen cloth at the middle and upper levels is 20 orders, and the order number of lower screen is 100 orders, temperature during screening is 80 ℃, and the screening time is 10 minutes;
(2) add N in the polyurethane chip, dinethylformamide mixes and obtains mixed liquor, and described polyurethane chip and N, the mass ratio of dinethylformamide are 2:5;
(3) base cloth one soaks one and rolls mixed liquor, and the distance between the roll is 0.75mm; Base cloth after padding is immersed in N, and the polyurethane on base cloth surface is solidified, and setting temperature is that 30 ℃, time are 10 minutes;
(4) base cloth after step (3) processing is washed in rinsing bowl, washing temperature is 45 ℃, and the speed of a motor vehicle of base cloth is 10 meters/minute; Described N, the mass percentage concentration of the dinethylformamide aqueous solution is 18%;
(5) base cloth after will washing was dried 3.5 minutes under 130 ℃ condition, promptly made the polyurethane leather semi-finished product.
Embodiment two: a kind of reuse method of polyurethane mill skin chip comprises following processing step:
(1) polyurethane being ground the skin chip sieves through the vibrosieve filter, the polyurethane chip is separated with fibre fluff, and the described vibrosieve filter order number of screen cloth at the middle and upper levels is 30 orders, and the order number of lower screen is 110 orders, temperature during screening is 90 ℃, and the screening time is 9 minutes;
(2) add N in the polyurethane chip, dinethylformamide mixes and obtains mixed liquor, and described polyurethane chip and N, the mass ratio of dinethylformamide are 2:6;
(3) base cloth one soaks one and rolls mixed liquor, and the distance between the roll is 0.8mm; Base cloth after padding is immersed in N, and the polyurethane on base cloth surface is solidified, and setting temperature is that 35 ℃, time are 9 minutes;
(4) base cloth after step (3) processing is washed in rinsing bowl, washing temperature is 50 ℃, and the speed of a motor vehicle of base cloth is 12 meters/minute; Described N, the mass percentage concentration of the dinethylformamide aqueous solution is 19%;
(5) base cloth after will washing was dried 2.5 minutes under 135 ℃ condition, promptly made the polyurethane leather semi-finished product.
Embodiment three: a kind of reuse method of polyurethane mill skin chip comprises following processing step:
(1) polyurethane being ground the skin chip sieves through the vibrosieve filter, the polyurethane chip is separated with fibre fluff, and the described vibrosieve filter order number of screen cloth at the middle and upper levels is 40 orders, and the order number of lower screen is 120 orders, temperature during screening is 100 ℃, and the screening time is 8 minutes;
(2) add N in the polyurethane chip, dinethylformamide mixes and obtains mixed liquor, and described polyurethane chip and N, the mass ratio of dinethylformamide are 2:7;
(3) base cloth one soaks one and rolls mixed liquor, and the distance between the roll is 0.85mm; Base cloth after padding is immersed in N, and the polyurethane on base cloth surface is solidified, and setting temperature is that 40 ℃, time are 8 minutes;
(4) base cloth after step (3) processing is washed in rinsing bowl, washing temperature is 55 ℃, and the speed of a motor vehicle of base cloth is 14 meters/minute; Described N, the mass percentage concentration of the dinethylformamide aqueous solution is 20%;
(5) base cloth after will washing was dried 5 minutes under 140 ℃ condition, promptly made the polyurethane leather semi-finished product.
Embodiment four: a kind of reuse method of polyurethane mill skin chip comprises following processing step:
(1) polyurethane being ground the skin chip sieves through the vibrosieve filter, the polyurethane chip is separated with fibre fluff, and the described vibrosieve filter order number of screen cloth at the middle and upper levels is 50 orders, and the order number of lower screen is 105 orders, temperature during screening is 110 ℃, and the screening time is 7 minutes;
(2) add N in the polyurethane chip, dinethylformamide mixes and obtains mixed liquor, and described polyurethane chip and N, the mass ratio of dinethylformamide are 2:5.5;
(3) base cloth one soaks one and rolls mixed liquor, and the distance between the roll is 0.9mm; Base cloth after padding is immersed in N, and the polyurethane on base cloth surface is solidified, and setting temperature is that 45 ℃, time are 7 minutes;
(4) base cloth after step (3) processing is washed in rinsing bowl, washing temperature is 60 ℃, and the speed of a motor vehicle of base cloth is 16 meters/minute; Described N, the mass percentage concentration of the dinethylformamide aqueous solution is 18.5%;
(5) base cloth after will washing was dried 4 minutes under 145 ℃ condition, promptly made the polyurethane leather semi-finished product.
Embodiment five: a kind of reuse method of polyurethane mill skin chip comprises following processing step:
(1) polyurethane being ground the skin chip sieves through the vibrosieve filter, the polyurethane chip is separated with fibre fluff, and the described vibrosieve filter order number of screen cloth at the middle and upper levels is 25 orders, and the order number of lower screen is 115 orders, temperature during screening is 120 ℃, and the screening time is 6 minutes;
(2) add N in the polyurethane chip, dinethylformamide mixes and obtains mixed liquor, and described polyurethane chip and N, the mass ratio of dinethylformamide are 2:6.5;
(3) base cloth one soaks one and rolls mixed liquor, and the distance between the roll is 0.95mm; Base cloth after padding is immersed in N, and the polyurethane on base cloth surface is solidified, and setting temperature is that 32 ℃, time are 6 minutes;
(4) base cloth after step (3) processing is washed in rinsing bowl, washing temperature is 46 ℃, and the speed of a motor vehicle of base cloth is 18 meters/minute; Described N, the mass percentage concentration of the dinethylformamide aqueous solution is 19.5%;
(5) base cloth after will washing was dried 3 minutes under 150 ℃ condition, promptly made the polyurethane leather semi-finished product.
Embodiment six: a kind of reuse method of polyurethane mill skin chip comprises following processing step:
(1) polyurethane being ground the skin chip sieves through the vibrosieve filter, the polyurethane chip is separated with fibre fluff, and the described vibrosieve filter order number of screen cloth at the middle and upper levels is 60 orders, and the order number of lower screen is 100 orders, temperature during screening is 85 ℃, and the screening time is 5 minutes;
(2) add N in the polyurethane chip, dinethylformamide mixes and obtains mixed liquor, and described polyurethane chip and N, the mass ratio of dinethylformamide are 2:5.6;
(3) base cloth one soaks one and rolls mixed liquor, and the distance between the roll is 1.2mm; Base cloth after padding is immersed in N, and the polyurethane on base cloth surface is solidified, and setting temperature is that 42 ℃, time are 5 minutes;
(4) base cloth after step (3) processing is washed in rinsing bowl, washing temperature is 56 ℃, and the speed of a motor vehicle of base cloth is 20 meters/minute; Described N, the mass percentage concentration of the dinethylformamide aqueous solution is 18.6%;
(5) base cloth after will washing was dried 2 minutes under 136 ℃ condition, promptly made the polyurethane leather semi-finished product.
Claims (2)
1. the reuse method of a polyurethane mill skin chip is characterized in that, comprises following processing step:
(1) polyurethane being ground the skin chip sieves through the vibrosieve filter, the polyurethane chip is separated with fibre fluff, the described vibrosieve filter order number of screen cloth at the middle and upper levels is 20 ~ 60 orders, the order number of lower screen is 100 ~ 120 orders, temperature during screening is 80 ~ 120 ℃, and the screening time is 5 ~ 10 minutes;
(2) add N in the polyurethane chip, dinethylformamide mixes and obtains mixed liquor, and described polyurethane chip and N, the mass ratio of dinethylformamide are 2:5 ~ 7;
(3) base cloth one soaks one and rolls mixed liquor, and the distance between the roll is 0.75 ~ 1.2mm; Base cloth after padding is immersed in N, and the polyurethane on base cloth surface is solidified, and setting temperature is that 30 ~ 45 ℃, time are 5 ~ 10 minutes;
(4) base cloth after step (3) processing is washed in rinsing bowl, washing temperature is 45 ~ 60 ℃, and the speed of a motor vehicle of base cloth is 10 ~ 20 meters/minute;
(5) base cloth after will washing was dried under 130 ~ 150 ℃ condition 2 ~ 5 minutes, promptly made the polyurethane leather semi-finished product.
2. the reuse method of polyurethane mill skin chip as claimed in claim 1, it is characterized in that: described N, the mass percentage concentration of the dinethylformamide aqueous solution is 18% ~ 20%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101999705A CN102286886B (en) | 2011-07-18 | 2011-07-18 | Method for recycling polyurethane buffed detritus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101999705A CN102286886B (en) | 2011-07-18 | 2011-07-18 | Method for recycling polyurethane buffed detritus |
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| Publication Number | Publication Date |
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| CN102286886A true CN102286886A (en) | 2011-12-21 |
| CN102286886B CN102286886B (en) | 2012-12-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011101999705A Expired - Fee Related CN102286886B (en) | 2011-07-18 | 2011-07-18 | Method for recycling polyurethane buffed detritus |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103603210A (en) * | 2013-11-21 | 2014-02-26 | 上海华峰超纤材料股份有限公司 | Recycling method of superfine fiber polyurethane synthetic leather buffing powder |
| CN104213432A (en) * | 2014-09-26 | 2014-12-17 | 江西豪普高科涂层织物有限公司 | Polyurethane (PU) synthetic leather production process allowing solid waste recycling |
| IT202300001872A1 (en) * | 2023-02-06 | 2024-08-06 | Vegea Srl | THERMOPLASTIC POLYURETHANE RECYCLING PROCESS FOR THE PRODUCTION OF TECHNICAL FABRICS, IN PARTICULAR FAUX LEATHER, SINGLE MATERIAL AND VEGETABLE-BASED |
Citations (6)
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| CN1508356A (en) * | 2002-07-19 | 2004-06-30 | 郏群山 | Polyurethane synthetic leather lapping dust recovery and utilization |
| KR100581330B1 (en) * | 2005-10-25 | 2006-05-22 | 주식회사 백산 | Solvent-free polyurethane porous body and manufacturing method of artificial leather using same |
| CN101432367A (en) * | 2006-04-25 | 2009-05-13 | 雷米·斯多尔 | Leather material |
| CN101445582A (en) * | 2008-12-10 | 2009-06-03 | 合肥安利化工有限公司 | Method for recycling and regenerating waste polyurethane resin |
| CN101545212A (en) * | 2009-04-30 | 2009-09-30 | 江苏东泰聚合材料有限公司 | Hydrolysis resistance chemical leather and manufacturing method thereof |
| CN101560309A (en) * | 2009-05-19 | 2009-10-21 | 林中选 | Method for reclaiming polyurethane (PU) waste material |
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2011
- 2011-07-18 CN CN2011101999705A patent/CN102286886B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1508356A (en) * | 2002-07-19 | 2004-06-30 | 郏群山 | Polyurethane synthetic leather lapping dust recovery and utilization |
| KR100581330B1 (en) * | 2005-10-25 | 2006-05-22 | 주식회사 백산 | Solvent-free polyurethane porous body and manufacturing method of artificial leather using same |
| CN101432367A (en) * | 2006-04-25 | 2009-05-13 | 雷米·斯多尔 | Leather material |
| CN101445582A (en) * | 2008-12-10 | 2009-06-03 | 合肥安利化工有限公司 | Method for recycling and regenerating waste polyurethane resin |
| CN101545212A (en) * | 2009-04-30 | 2009-09-30 | 江苏东泰聚合材料有限公司 | Hydrolysis resistance chemical leather and manufacturing method thereof |
| CN101560309A (en) * | 2009-05-19 | 2009-10-21 | 林中选 | Method for reclaiming polyurethane (PU) waste material |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103603210A (en) * | 2013-11-21 | 2014-02-26 | 上海华峰超纤材料股份有限公司 | Recycling method of superfine fiber polyurethane synthetic leather buffing powder |
| CN103603210B (en) * | 2013-11-21 | 2015-10-28 | 上海华峰超纤材料股份有限公司 | The reuse method of superfine fiber polyurethane leather mill skin powder |
| CN104213432A (en) * | 2014-09-26 | 2014-12-17 | 江西豪普高科涂层织物有限公司 | Polyurethane (PU) synthetic leather production process allowing solid waste recycling |
| IT202300001872A1 (en) * | 2023-02-06 | 2024-08-06 | Vegea Srl | THERMOPLASTIC POLYURETHANE RECYCLING PROCESS FOR THE PRODUCTION OF TECHNICAL FABRICS, IN PARTICULAR FAUX LEATHER, SINGLE MATERIAL AND VEGETABLE-BASED |
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| CN102286886B (en) | 2012-12-26 |
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