CN104278540A - Production method for ultrathin polyurethane imitating leather - Google Patents

Production method for ultrathin polyurethane imitating leather Download PDF

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Publication number
CN104278540A
CN104278540A CN201310279183.0A CN201310279183A CN104278540A CN 104278540 A CN104278540 A CN 104278540A CN 201310279183 A CN201310279183 A CN 201310279183A CN 104278540 A CN104278540 A CN 104278540A
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China
Prior art keywords
polyurethane
ultra
production method
imitative
adhesive
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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.)
Granted
Application number
CN201310279183.0A
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Chinese (zh)
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CN104278540B (en
Inventor
林炳忠
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hongsheng Leather (Dongguan) Co., Ltd.
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ZHEJIANG XIN FU LAI INDUSTRY Co Ltd
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Priority to CN201310279183.0A priority Critical patent/CN104278540B/en
Publication of CN104278540A publication Critical patent/CN104278540A/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/18—Handling of layers or the laminate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/16—Drying; Softening; Cleaning
    • B32B38/164—Drying
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • 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
    • D06N3/0043—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by their foraminous structure; Characteristics of the foamed layer or of cellular layers
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/007—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by mechanical or physical treatments
    • D06N3/0077—Embossing; Pressing of the surface; Tumbling and crumbling; Cracking; Cooling; Heating, e.g. mirror finish
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/04—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 by reactions only involving carbon-to-carbon unsaturated bonds
    • D06N3/06—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 by reactions only involving carbon-to-carbon unsaturated bonds with polyvinylchloride or its copolymerisation products
    • D06N3/08—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 by reactions only involving carbon-to-carbon unsaturated bonds with polyvinylchloride or its copolymerisation products with a finishing layer consisting of polyacrylates, polyamides or polyurethanes or polyester
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/26—Polymeric 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
    • D06N2203/00—Macromolecular materials of the coating layers
    • D06N2203/06—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D06N2203/068—Polyurethanes
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N2209/00—Properties of the materials
    • D06N2209/10—Properties of the materials having mechanical properties
    • D06N2209/103—Resistant to mechanical forces, e.g. shock, impact, puncture, flexion, shear, compression, tear
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N2209/00—Properties of the materials
    • D06N2209/16—Properties of the materials having other properties
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N2209/00—Properties of the materials
    • D06N2209/16—Properties of the materials having other properties
    • D06N2209/1607—Degradability
    • D06N2209/1621—Water-soluble, water-dispersible
    • 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)
  • Synthetic Leather, Interior Materials Or Flexible Sheet Materials (AREA)
  • Treatment And Processing Of Natural Fur Or Leather (AREA)

Abstract

The invention discloses a production method for an ultrathin polyurethane (PU) imitating leather. The method comprises the steps of: (1) treating a polyurethane surface layer by a pretreatment agent and then performing drying at 120-130DEG C; (2) coating the polyurethane surface layer with a foaming layer slurry, then putting the polyurethane surface layer into an oven to conduct drying at 170-175DEG C; (3) adding hydrolysis resistant resin to the foaming layer slurry, then coating an adhesive layer, and putting the material into an oven to perform drying at 155-160DEG C; (4) taking the adhesive layer and an all-adhesive base cloth to conduct treatment by a three-edition surface processor; and (5) carrying out after-treatment. According to the method provided by the invention, pretreatment is conducted on the polyurethane surface layer to make it have better scratch resistance and physical strength, the base layer adopts special hydrolysis resistant resin, the base cloth employs the all-adhesive base cloth, and the product is subjected to three-edition treatment and then to after-treatment. The prepared PU imitating leather finished product can reach the surface effect of PU products, and the peeling, hydrolysis resistance and other physical properties of the product are superior to those of PU products.

Description

A kind of production method of ultra-thin imitative polyurethane leather
Technical field
The invention belongs to artificial synthetic leather technical field, be specifically related to a kind of production method of ultra-thin imitative polyurethane leather.
Background technology
Imitative PU leather is characterized in that top layer is polyurethane (PU), bottom is PVC, both there is PU and removed from office good feel, outward appearance, ventilative, the tractable characteristic of moisture-inhibiting and surface, there is again the advantage that PVC leather is durable in use, cheap, the market competitiveness is strong, be widely used in fields such as producing case and bag, clothes, footwear, furniture, sports goods, account for 30 ~ 40% of dermatine output.
At present, in the production method of artificial leather, rubbing method (comprising direct rubbing method and transfer coated method) is the main manufacture methods of artificial leather.In the manufacture process of artificial leather, need solvent-borne type table place resin, solvent-borne type surface layer resin and solvent welding glue, table place resin etc. give that leather adds lustre to, delustring and various effector function, these table place resin, surface layer resin and adhesive glues are based on solvent type PU or acrylic acid, organic solvent is inflammable and explosive, smell is large, toxicity is large, both there is potential safety hazard, endangered again worker physically and mentally healthy.In addition, there is surface effect and PU product similarity is low, peel off and the physical property such as hydrolysis does not reach the defect of instructions for use in the artificial leather of at present preparation.
Summary of the invention
For solving the problems of the technologies described above, the invention provides a kind of production method of ultra-thin imitative polyurethane leather, this production method is environmentally friendly, and surface effect and the PU product similarity of the imitative PU product of manufacture are high, and the physical properties such as stripping and hydrolysis are better than PU product.
For achieving the above object, the technical solution used in the present invention is:
A production method for ultra-thin imitative polyurethane leather, comprises the steps:
(1) after, by polyurethane cover using pretreating reagent process, in 120 ~ 130 DEG C of oven dry;
(2), the polyurethane cover of step (1) is coated with and scrapes foaming layer slurry, then put into baking oven with 170 ~ 175 DEG C of dryings;
(3), on step (2) foaming layer slurry, add hydrolysis resin after be coated with and scrape adhesive layer, then put into baking oven with 155 ~ 160 DEG C of dryings;
(4) adhesive layer and the full viscose glue base fabric of, getting step (3) process in three editions list processors;
(5), the polishing material of step (4) is carried out post-processed and is namely obtained ultra-thin imitative polyurethane leather finished product.
Above-mentioned steps also comprises fretting map process in (2).
Above-mentioned steps also comprises bonding process in (4).
Above-mentioned steps (5) post-processed comprises embossing, line, finished product inspection packaging process are rubbed in polishing, excessively water.
The foaming layer slurry of above-mentioned steps (2) is foam polyvinyl chloride layer slurry.
The adhesive that in above-mentioned steps (3), adhesive layer uses is aqueous adhesive polycarbodiimide, gathers ethylenimide or epoxy resin.
For reducing environmental pollution, reduce the consumption of organic solvent, the adhesive that in above-mentioned steps (3), adhesive layer uses is aqueous adhesive polycarbodiimide, gathers ethylenimide or epoxy resin.
Beneficial effect of the present invention:
The present invention carries out pre-treatment to polyurethane cover, it is made to have better scratch resistance, physical strength, bottom employs special hydrolysis resin, base fabric employs full viscose glue base fabric, product carries out post-processed after three editions process, the imitative PU of preparation removes from office the surface effect that finished product can reach PU product, and the physical properties such as the stripping of product and hydrolysis are better than PU product.The imitative PU leather end properties of preparation is excellent, and have better outward appearance and soft and smooth feel, Long-Time Service is fugitive color not, is suitable for making case and bag, clothes, footwear, furniture, sports goods etc.
Detailed description of the invention
For ease of understanding the present invention, it is as follows that the present invention enumerates embodiment.Those skilled in the art should understand, described embodiment only understands the present invention for helping, and should not be considered as concrete restriction of the present invention.
As no specific instructions, various raw material of the present invention all can be obtained by commercially available; Or prepare according to the conventional method of this area.Unless otherwise defined or described herein, all specialties used herein and scientific words and art technology skillfully the person of entering the meaning be familiar with identical.In addition any method similar or impartial to described content and material all can be applicable in the inventive method.
Embodiment 1
A production method for ultra-thin imitative polyurethane leather, comprises the steps:
(1), after, by polyurethane cover using pretreating reagent process, dry 60 seconds in 120 ~ 130 DEG C;
(2), the polyurethane cover of step (1) is coated with and scrapes 5%w foam polyvinyl chloride layer slurry, coating layer thickness is 0.2mm, after carrying out fretting map process, then puts into baking oven with 170 ~ 175 DEG C of dryings 30 seconds;
(3), on step (2) foaming layer slurry, add hydrolysis resin after be coated with scrape the sub-adhesive layer of poly-carbonization two, bondline thickness is 0.08mm, then puts into baking oven with 155 ~ 160 DEG C of dryings 4 hours;
(4) adhesive layer and the full viscose glue base fabric of, getting step (3) carry out processing and fitting processing in three editions list processors;
(5), the polishing material of step (4) carries out embossing, line is rubbed in polishing, excessively water, namely the process of finished product inspection packaging obtains ultra-thin imitative polyurethane leather finished product of the present invention.
The imitative PU that this method is produced removes from office surface effect and PU product similarity reaches more than 90%, and the physical properties such as the stripping of product and hydrolysis are better than PU product, and outward appearance is beautiful, and feel is soft and smooth, and expansion ratio is 2.0, and softness is moderate.
Embodiment 2
The adhesive that in step (3), adhesive layer uses is poly-ethylenimide, the embossing of step (5) and mistake water are rubbed in line and are also comprised haze treatment process, other step is same as embodiment 1, the imitative PU that this method is produced removes from office nature light, coating has good wear-resisting, scratch resistance and antifouling property, and feel is soft and smooth, plentiful abundant.
Embodiment 3
The adhesive that in step (3), adhesive layer uses is epoxy resin, the embossing of step (5) and mistake water are rubbed in line and are also comprised haze treatment process, other step is same as embodiment 1, the imitative PU that this method is produced removes from office surface effect and PU product similarity reaches more than 90%, outward appearance is beautiful, feel is soft and smooth, and expansion ratio is 1.8, and softness is moderate.
Applicant states, person of ordinary skill in the field is on the basis of above-described embodiment, by the actual temp of above-described embodiment component or content point value, combined with the technical scheme of summary of the invention part, thus the new number range produced, also be one of record scope of the present invention, the application, for making description simple and clear, no longer enumerates these number ranges.

Claims (7)

1. a production method for ultra-thin imitative polyurethane leather, described ultra-thin imitative polyurethane leather comprises polyurethane cover, foaming layer and adhesive layer, it is characterized in that, comprises the steps:
(1) after, by polyurethane cover using pretreating reagent process, in 120 ~ 130 DEG C of oven dry;
(2), the polyurethane cover of step (1) is coated with and scrapes foaming layer slurry, then put into baking oven with 170 ~ 175 DEG C of dryings;
(3), on step (2) foaming layer slurry, add hydrolysis resin after be coated with and scrape adhesive layer, then put into baking oven with 155 ~ 160 DEG C of dryings;
(4) adhesive layer and the full viscose glue base fabric of, getting step (3) process in three editions list processors;
(5), the polishing material of step (4) is carried out post-processed and is namely obtained ultra-thin imitative polyurethane leather finished product.
2. the production method of a kind of ultra-thin imitative polyurethane leather according to claim 1, is characterized in that: described step also comprises fretting map process in (2).
3. the production method of a kind of ultra-thin imitative polyurethane leather according to claim 1, is characterized in that: described step also comprises bonding process in (4).
4. the production method of a kind of ultra-thin imitative polyurethane leather according to claim 1, is characterized in that: described step (5) post-processed comprises embossing, line, finished product inspection packaging process are rubbed in polishing, excessively water.
5. the production method of a kind of ultra-thin imitative polyurethane leather according to claim 4, is characterized in that: described embossing and excessively water are rubbed in line and also comprised haze treatment process.
6. the production method of a kind of ultra-thin imitative polyurethane leather according to claim 1, is characterized in that: the foaming layer slurry of described step (2) is foam polyvinyl chloride layer slurry.
7. the production method of a kind of ultra-thin imitative polyurethane leather according to claim 1, is characterized in that: the adhesive that in described step (3), adhesive layer uses is aqueous adhesive polycarbodiimide, gathers ethylenimide or epoxy resin.
CN201310279183.0A 2013-07-04 2013-07-04 A kind of production method of ultra-thin imitative polyurethane leather Active CN104278540B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108049192A (en) * 2017-12-05 2018-05-18 福建宝利特科技股份有限公司 The preparation method of gradient color PU/PVC composite artificial leathers

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03279474A (en) * 1990-03-28 1991-12-10 Achilles Corp Sheet-like material having leather-type appearance
KR20010029008A (en) * 1999-09-28 2001-04-06 현창순 process for preparing polyurethane/polyvinylchloride synthetic leather
CN101941321A (en) * 2010-08-03 2011-01-12 丽水市优耐克水性树脂科技有限公司 Method for manufacturing synthetic leather and synthetic leather
CN102409554A (en) * 2011-09-16 2012-04-11 东台市富安合成材料有限公司 Foaming synthetic leather manufacturing technology based on waterborne polyurethane (WPU)
CN202543701U (en) * 2012-04-20 2012-11-21 欧诺法装饰材料（上海）有限公司 High-performance super-soft polyurethane (PU) artificial leather
CN102797164A (en) * 2012-08-15 2012-11-28 福建宝利特集团有限公司 PU/PVC synthetic leather and its manufacturing method
CN102995447A (en) * 2012-10-23 2013-03-27 合肥市安山涂层织物有限公司 Low-density polyethylene-modified polyvinyl chloride (PVC) synthetic leather and manufacturing method thereof

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03279474A (en) * 1990-03-28 1991-12-10 Achilles Corp Sheet-like material having leather-type appearance
KR20010029008A (en) * 1999-09-28 2001-04-06 현창순 process for preparing polyurethane/polyvinylchloride synthetic leather
CN101941321A (en) * 2010-08-03 2011-01-12 丽水市优耐克水性树脂科技有限公司 Method for manufacturing synthetic leather and synthetic leather
CN102409554A (en) * 2011-09-16 2012-04-11 东台市富安合成材料有限公司 Foaming synthetic leather manufacturing technology based on waterborne polyurethane (WPU)
CN202543701U (en) * 2012-04-20 2012-11-21 欧诺法装饰材料（上海）有限公司 High-performance super-soft polyurethane (PU) artificial leather
CN102797164A (en) * 2012-08-15 2012-11-28 福建宝利特集团有限公司 PU/PVC synthetic leather and its manufacturing method
CN102995447A (en) * 2012-10-23 2013-03-27 合肥市安山涂层织物有限公司 Low-density polyethylene-modified polyvinyl chloride (PVC) synthetic leather and manufacturing method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108049192A (en) * 2017-12-05 2018-05-18 福建宝利特科技股份有限公司 The preparation method of gradient color PU/PVC composite artificial leathers

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Effective date of registration: 20170523

Address after: 325000, No. 32, Yongkang Road, Haibin street, Longwan District, Zhejiang, Wenzhou

Applicant after: Li Xiaobin

Address before: 325100, Zhejiang County, Taizhou Province, three counties along the red (Zhejiang three coastal industrial city)

Applicant before: ZHEJIANG XIN FU LAI INDUSTRY CO., LTD.

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Inventor after: Lin Bingzhong

Inventor after: Ji Guifen

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Effective date of registration: 20190418

Address after: 523007 Wentang Industrial Zone, Dongcheng District, Dongguan City, Guangdong Province

Patentee after: Hongsheng Leather (Dongguan) Co., Ltd.

Address before: 325000 Yongkang Road, Haibin Street, Longwan District, Wenzhou City, Zhejiang Province

Patentee before: Li Xiaobin