CN1508356A - Polyurethane synthetic leather lapping dust recovery and utilization - Google Patents
Polyurethane synthetic leather lapping dust recovery and utilization Download PDFInfo
- Publication number
- CN1508356A CN1508356A CNA021388164A CN02138816A CN1508356A CN 1508356 A CN1508356 A CN 1508356A CN A021388164 A CNA021388164 A CN A021388164A CN 02138816 A CN02138816 A CN 02138816A CN 1508356 A CN1508356 A CN 1508356A
- Authority
- CN
- China
- Prior art keywords
- grinding dust
- synthetic leather
- grinding
- dmf
- auxiliary agent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000428 dust Substances 0.000 title claims abstract description 28
- 239000002649 leather substitute Substances 0.000 title claims abstract description 19
- 229920002635 polyurethane Polymers 0.000 title abstract description 13
- 239000004814 polyurethane Substances 0.000 title abstract description 13
- 238000011084 recovery Methods 0.000 title description 2
- 238000000227 grinding Methods 0.000 claims abstract description 40
- 239000002994 raw material Substances 0.000 claims abstract description 8
- 239000002904 solvent Substances 0.000 claims abstract description 3
- 239000012752 auxiliary agent Substances 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 238000005516 engineering process Methods 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 238000004064 recycling Methods 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 239000013530 defoamer Substances 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 4
- 239000006097 ultraviolet radiation absorber Substances 0.000 claims description 3
- 239000004604 Blowing Agent Substances 0.000 claims description 2
- 230000000740 bleeding effect Effects 0.000 claims description 2
- 239000002270 dispersing agent Substances 0.000 claims description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N ferric oxide Chemical compound O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 2
- -1 softener Substances 0.000 claims description 2
- 239000004094 surface-active agent Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000003912 environmental pollution Methods 0.000 abstract description 3
- 238000002156 mixing Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 16
- 229920005749 polyurethane resin Polymers 0.000 description 7
- 239000004744 fabric Substances 0.000 description 5
- 239000004088 foaming agent Substances 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000005187 foaming Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 239000000945 filler Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000002798 polar solvent Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 210000002615 epidermis Anatomy 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 239000011527 polyurethane coating Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Landscapes
- Synthetic Leather, Interior Materials Or Flexible Sheet Materials (AREA)
Abstract
The invention discloses a recycle of polyurethane synthetic leather grinding dust, adopting NuBuck grinding dust as main raw material and DMF as solvent, blending and dissolving, adjusting viscosity to 8700-15000cps, and adding in assistant according to normal quantity. It reduces the production cost; eliminate the environmental pollution caused by burning or dumping grinding dust.
Description
(1) technical field: the present invention relates to a kind of Synthetic Leather production method, relate in particular to and utilize the NuBuck grinding dust to substitute the method that polyurethane resin prepares Synthetic Leather.
(2) background technology: Wet-type polyurethane synthetic leather preparation technology basic step is: 1, be base cloth, be coated on the base cloth based on the coating fluid of polyurethane resin with nonwoven fabric, woven and woven cloth; 2, the semi-finished product that coating fluid was coated with place 5-50 ℃ of water or contain 5-50% left and right sides N, dipping is 3-30 minute in the water mixed liquid of N-2-methylformamide (being called for short DMF), and making films solidifies and the inner one deck microporous foam layer that forms of filming in process of setting; 3, place 20-95 ℃ of water to wash then, through behind the washing procedure, be placed on drying under the 60-150 ℃ of temperature again, thereby obtain the wet type synthetic leather.The wet type synthetic leather that has micropore is made the synthetic leather that satisfies different needs according to the method difference of its postorder processed.A kind of is to become the FullGrain goods after embossed; A kind of is to produce wet dry doubling goods after the release liners veneer is handled; Produce the NuBuck goods in addition exactly after milled processed, three kinds of goods all can replace corium and make clothes, shoes, case and bag, sofa etc.In the process of producing the NuBuck goods,, also little pore grinding of inside is broken so that top layer one-tenth fine hair shape simultaneously except that coating film on the polyurethane is ground away.In the process of this grinding, produce a large amount of grinding dusts, mainly contain polyurethane resin and wood powder or CaCO in these grinding dusts
3, and be to throw away or incinerate as the rubbish level to the processing of these grinding dusts at present.These two kinds of processing methods all cause the pollution and the raw-material waste of environment.
(3) summary of the invention:, the invention provides and produce grinding dust in the process of a kind of NuBuck of utilization and make the raw material substitution polyurethane resin and prepare the method that polyurethane coated liquid is produced synthetic leather in order to solve the grinding dust environmental pollution problem that produces in the process of producing NuBuck.Technical scheme of the present invention realizes in the following manner:
A kind of recovery profit of Synthetic Leather grinding dust, it is to be main raw material, to be solvent with DMF with the NuBuck grinding dust, forms through stirring, dissolving, and adjusts viscosity to 8700-15000cps, presses
Usual amounts adds conventional auxiliary agent.
The raw material weight umber is: 100 parts of grinding dusts, DMF 280-315 part, auxiliary agent are an amount of, preparation technology is: get 100 parts of grinding dusts, dry in dryer, 90-150 ℃ of dryer temperature control makes grinding dust water content≤0.5%, and grinding dust is added in the DMF, stir while adding, control viscosity was 8700-15000cps to dissolving fully in 10-30 minute, added conventional auxiliary agent by usual amounts.
Conventional auxiliary agent is surfactant, blowing agent, defoamer, levelling agent, look dispersant, pulls out aqua, bleeding agent, softener, ultra-violet absorber.
Inventive point of the present invention is based on utilizing the NuBuck grinding dust to substitute polyurethane resin for main raw material, be because in producing the NuBuck process, polyurethane coating film on the base cloth was to be dissolved in the solution that forms among the DMF with polyurethane resin before foamed set, and contained wood powder or the CaCO of 0-50%
3As filler, in foaming and process of setting, DMF is replaced by water along with polar solvent, form hydrogen bond and the film forming of hardening gradually between polyurethane molecular, this film is in the presence of polar solvent DMF, can dissolve because of hydrogen bond rupture, owing to special manufacturing technique, foaming layer is arranged below the superincumbent skim; So the polyurethane molecular structure is not changed or is destroyed.The present invention has utilized this point again the grinding dust that contains polyurethane resin and filler to be dissolved just, and the auxiliary agent that is lost is replenished, and make in its manufacturing technique that joins original NuBuck again, thereby good effect of the present invention is:
1, reduce production costs, because grinding dust is the by-product waste material of this workshop, thereby gathers materials on the spot, to the NuBuck total production cost 20-30% can fall.
2, eliminated because of burning or outwelling the environmental pollution that grinding dust causes, benefit the nation and the people, and reduced the wasting of resources and the investment that causes because of improper processing grinding dust.
(4) description of drawings: Fig. 1 is the layer structure schematic diagram of Synthetic Leather before handling.
As seen from Figure 1, polyurethane divides three layers before further handling after film forming, and promptly base cloth 1, foaming layer 2, epidermis rete 3.
(5) specific embodiment.
The invention will be further described below in conjunction with embodiment.
Embodiment one: 100 kilograms of polyurethane grinding dusts, DMF280 kilogram, 0.38 kilogram of defoamer SPA-102,5.2 kilograms of foaming agent TSHs, levelling agent BYK2.4 kilogram; Preparation technology is: get grinding dust, and dry in dryer, 90-150 ℃ of dryer temperature control, make grinding dust water content≤0.5%, grinding dust is added in the DMF, stir while adding, 10-30 minute is 15000cps to dissolving fully through viscosimetric, adds auxiliary agent by the prescription consumption.The above-mentioned prescription that has prepared is passed through each step by the technology of wet polyurethane finished leather make required wet type synthetic leather at last.
Embodiment two: 100 kilograms of polyurethane grinding dusts, DMF290 kilogram, 5.2 kilograms of foaming agent TSHs, softener ES2.6 kilogram; This prescription is 12000cps through viscosimetric; The same embodiment of its preparing process
100 kilograms of embodiment three ∷ polyurethane grinding dusts, DMF300 kilogram, 5.2 kilograms of foaming agent TSHs, 0.38 kilogram of defoamer SPA-102; This prescription is 10000cps through viscosimetric; Its preparing process is with embodiment one.
Embodiment four: 100 kilograms of polyurethane grinding dusts, DMF315 kilogram, 5.2 kilograms of foaming agent TSHs, 1.5 kilograms of ultra-violet absorber uv-326; This prescription is 8700cps through viscosimetric; Its preparing process is with embodiment one.
Above-mentioned Synthetic Leather test specimen carries out quality test with reference to the NIKE testing standard, its Specifeca tion speeification such as following table 1:
As can be seen from Table 1, under the same working condition, all reach and be higher than the NIKE standard with the every main performance standard of the synthetic leather of grinding dust production; With its surface texture of microscopic examination, the surface is smoother, and micropore is evenly distributed, and meets the processing characteristics of FullGrain goods, wet dry doubling goods, NuBuck goods.
Claims (4)
1, a kind of recycling of Synthetic Leather grinding dust is characterized in that being main raw material, being solvent with DMF with the NuBuck grinding dust, forms through stirring, dissolving, and adjusts viscosity to 8700-15000cps, adds conventional auxiliary agent by usual amounts.
2, the recycling of Synthetic Leather grinding dust according to claim 1 is characterized in that the raw material weight umber is: 100 parts of grinding dusts, DMF 280-315 part, auxiliary agent are an amount of.
3, the recycling of Synthetic Leather grinding dust according to claim 1 and 2, auxiliary agent is surfactant, blowing agent, defoamer, levelling agent, look dispersant, pulls out aqua, bleeding agent, softener, ultra-violet absorber.
4, recycling according to the described Synthetic Leather grinding dust of claim 1-3, it is characterized in that preparation technology is: get 100 parts of grinding dusts, dry in dryer, 90-150 ℃ of dryer temperature control, make grinding dust water content≤0.5%, grinding dust is joined in the DMF of 280-315 part, stir while adding, 10-30 minute to dissolving fully, control viscosity is 8700-15000cps, adds conventional auxiliary agent by usual amounts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021388164A CN1508356A (en) | 2002-07-19 | 2002-07-19 | Polyurethane synthetic leather lapping dust recovery and utilization |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021388164A CN1508356A (en) | 2002-07-19 | 2002-07-19 | Polyurethane synthetic leather lapping dust recovery and utilization |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1508356A true CN1508356A (en) | 2004-06-30 |
Family
ID=34231777
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA021388164A Pending CN1508356A (en) | 2002-07-19 | 2002-07-19 | Polyurethane synthetic leather lapping dust recovery and utilization |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1508356A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100494525C (en) * | 2007-07-06 | 2009-06-03 | 烟台氨纶股份有限公司 | Method for regenerating normal spandex fibre from dry spinning spandex waste silk |
| CN102286886A (en) * | 2011-07-18 | 2011-12-21 | 无锡双象超纤材料股份有限公司 | Method for recycling polyurethane buffed detritus |
| CN102532879A (en) * | 2011-12-19 | 2012-07-04 | 上海华峰超纤材料股份有限公司 | Polyurethane elastomer prepared from superfine fiber synthetic leather ground powder and preparation method |
-
2002
- 2002-07-19 CN CNA021388164A patent/CN1508356A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100494525C (en) * | 2007-07-06 | 2009-06-03 | 烟台氨纶股份有限公司 | Method for regenerating normal spandex fibre from dry spinning spandex waste silk |
| CN102286886A (en) * | 2011-07-18 | 2011-12-21 | 无锡双象超纤材料股份有限公司 | Method for recycling polyurethane buffed detritus |
| CN102286886B (en) * | 2011-07-18 | 2012-12-26 | 无锡双象超纤材料股份有限公司 | Method for recycling polyurethane buffed detritus |
| CN102532879A (en) * | 2011-12-19 | 2012-07-04 | 上海华峰超纤材料股份有限公司 | Polyurethane elastomer prepared from superfine fiber synthetic leather ground powder and preparation method |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |