CN103255639B - Environmentally-friendly polyurethane leather, preparation method and product thereof - Google Patents

Environmentally-friendly polyurethane leather, preparation method and product thereof Download PDF

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CN103255639B
CN103255639B CN201310137494.3A CN201310137494A CN103255639B CN 103255639 B CN103255639 B CN 103255639B CN 201310137494 A CN201310137494 A CN 201310137494A CN 103255639 B CN103255639 B CN 103255639B
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layer
water
leather
parts
polyurethane
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CN201310137494.3A
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CN103255639A (en
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杨小波
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晋江市闽高纺织科技有限公司
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Abstract

The invention discloses environmentally-friendly polyurethane leather. The environmentally-friendly polyurethane leather comprises a microfiber non-woven fabric, a bottom layer covering on the non-woven fabric, as well as a surface layer, a PVC (Polyvinyl Chloride) foaming layer and a water-based adhesive layer which cover the bottom layer. After a polyurethane leather semi-finished product is foamed and embossed, the surface treatment is carried out by adopting a three-edition surface dressing machine, the sizing amount of a water-based surface dressing agent is 40-60g/m<2>, the drying temperature and time are respectively 140-150 DEG C and 60-90 seconds, and the finished product is obtained after a leather blank subjected to surface dressing is subjected to twisting, drying and measuring. The surface layer comprises four layers of coatings, namely an adhesive layer, a first intermediate layer, a second intermediate layer and a surface layer respectively. The environmentally-friendly polyurethane leather is widely applied on shoes, sofa, garments, suitcases, furniture and interior decoration.

Description

A kind of environment-friendly polyurethane leather, preparation method and goods thereof
Technical field
The present invention relates to artificial leather field, be specifically related to a kind of environment-friendly polyurethane leather, preparation method and goods thereof.
Background technology
Along with the development of society, the raising of human living standard, the requirement for the consumer goods is more and more higher, natural leather wherein a kind of focus consumption product just.Because the restriction and countries in the world that are subject to natural conditions are strengthened the consciousness watched for animals, natural leather reduces year by year, and in order to substitute this natural leather, synthetic leather is invented.
China is world's polyvinyl chloride (PVC) artificial leather production and consumption big country, and its production capacity and output account for 73% and 69% of the world respectively.Half PU leather is the upgrading products of PVC leather, be characterized in that top layer is PU, bottom is PVC, both there is PU and removed from office good feel, outward appearance, ventilative, the easy treatment characteristic of moisture-inhibiting and surface, there is again the advantage that PVC leather is durable in use, cheap, the market competitiveness is strong, has been widely used in fields such as producing case and bag, clothes, footwear, furniture, sports goods, has accounted for the 30-40% of dermatine output.
But artificial leather, half PU remove from office the severe challenge that industry is also faced with environmental pollution.Artificial leather, the half PU exhaust emission of removing from office on production line mainly come from the unordered discharge of the organic solvent in the place's agent of solvent-borne type table, surface layer resin, adhesive, and these solvents have dimethyl formamide (DMF), toluene, ethyl acetate, butyl acetate, butanone and dimethoxym ethane etc.According to measuring and calculating, every 1 half PU removes from office production line, annual discharge DMF 10.2 tons, annual discharge toluene 50.8 tons, annual discharge butanone 50.80 tons, discharge DOP 1.32 tons, acetate esters solvent 24.5 tons.Therefore, artificial leather industry is faced with that environmental improvement cost is high for a long time, serious waste of resources, environmental pollution stern challenge, how developing water paste and substitute traditional solvent-borne type slurry, is the key safeguarding the sustainable development of artificial leather industry.
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 rubbing method PVC leather, need solvent-borne type table place resin, solvent-borne type surface layer resin and solvent welding glue (glue content 25-30%, 70-75% is organic solvent), table place resin gives that leather adds lustre to, delustring and various effector function, and consumption is about 40-60g/m 2; Surface layer resin mainly provides the surface layer of half PU leather, and consumption is about 60-80g/m 2; Bonded adhesives is used for bonding PVC film and Ji Bu (rolling process does not generally need), and consumption is about 80-100g/m 2.Traditional table place resin, surface layer resin and adhesive glue are based on solvent type PU or acrylic acid, and organic solvent is inflammable and explosive, smell is large, toxicity is large, both there is potential safety hazard, endanger again worker physically and mentally healthy.
In recent years, along with the raising of people's living standard, the ecological property of people to leather goods is had higher requirement.America and Europe, to artificial leather, half PU leather, particularly house ornamentation interior decoration leather, interior leather for automobiles, clothing leather, furniture leather etc. propose the requirement of zero formaldehyde, zero azo, zero heavy metal, require VOC (volatile organic content)≤5mmg/Kg (leather) simultaneously.Therefore, it is the process hides requirement that cannot meet eco-friendly that traditional half PU based on Solvent Resin removes from office manufacture method.
Summary of the invention
In view of this, the technical problem that the present invention solves is, provides a kind of environment-friendly polyurethane to remove from office, eliminate organic solvent pollution from source, save organic solvent resource, eliminate safe hidden trouble, improve working environment, improve ecological grades and the competitiveness in the international market of half PU leather.
Object of the present invention is realized by following technical measures, and wherein said raw material number unless otherwise indicated, is parts by weight.
A kind of environment-friendly polyurethane leather, comprise super fine nonwoven fabric, the bottom covered on described nonwoven fabric, and the surface layer, foam polyvinyl chloride layer, the water-based adhesive linkage that cover on described bottom, it is characterized in that: after half polyurethane leather semi-finished product foaming embossing, adopt three editions table place machines to carry out surface treatment, the starching amount of waterborne surface treatment agent is 40 ~ 60g/m 2, baking temperature and time are respectively 140 ~ 150 DEG C, 60 ~ 90s, and the leather base behind table place gets product after rubbing line, drying, gage, and described surface layer comprises 4 layers of coating, is respectively:
Tack coat, covers above described bottom, and the slurry of described tack coat comprises following raw material by weight:
First waterborne polyurethane resin 80-100 part, water 10-20 part, aqueous promoter 0-5 part;
First intermediate layer, covers above described tack coat, and the slurry in described first intermediate layer comprises following raw material by weight:
Second waterborne polyurethane resin 80-100 part, water 20-30 part, aqueous promoter 0-5 part;
Second intermediate layer, cover above described first intermediate layer, the slurry in described second intermediate layer comprises following raw material by weight:
3rd waterborne polyurethane resin 80-100 part, water 20-30 part, aqueous promoter 0-5 part;
Superficial layer, cover above described second intermediate layer, the slurry of described superficial layer comprises following raw material by weight;
4th waterborne polyurethane resin 80-100 part, water 30-40 part, aqueous promoter 0-5 part;
Described foam polyvinyl chloride layer slurry comprises following raw material by weight:
Dioctyl phthalate 10 ~ 20 parts, 100 parts, polyvinyl chloride powder, toner 2 ~ 5 parts, azodicarbonamide foaming agent 5 ~ 15 parts, stearate 2 ~ 4 parts are mixed, is made into foaming layer slurry
Described foam polyvinyl chloride layer slurry comprises following raw material by weight:
Described water-based adhesive linkage comprises following raw material by weight:
Aqueous adhesive 100 parts, water-based thickener 0.5 ~ 0.8 part are mixed, water-based levelling agent 0.2 ~ 0.4 part, be made into the aqueous adhesive that viscosity is 4500 ~ 5000mPa.s;
Described waterborne surface treatment agent comprises following raw material by weight:
By aqueous polyurethane gloss oil 100 parts, water-based thickener 0.5 ~ 0.8 part, water-based levelling agent 0.2 ~ 0.4 part, water cross-linking agent 2 ~ 5 parts, feel modifying agent 2 ~ 5 parts mixes, and is made into the waterborne surface treatment agent that viscosity is 1000 ~ 1500mPa.s.
Described first waterborne polyurethane resin is modulus is 25-35kg/cm 2, molecular weight is 0.5 × 10 5-0.6 × 10 5the polyurethane resin of Mr; Described second waterborne polyurethane resin is modulus is 55-65kg/cm 2, molecular weight is 0.6 × 10 5-0.7 × 10 5polyurethane resin; Described 3rd waterborne polyurethane resin is modulus is 55-65kg/cm 2, molecular weight is 0.6 × 10 5-0.7 × 10 5polyurethane resin; Described 4th waterborne polyurethane resin is modulus is 65-75kg/cm 2, molecular weight 0.7 × 10 5-0.8 × 10 5polyurethane resin.
Described aqueous promoter is one or more in water-based thickener, water-based levelling agent, water-based defoamer.
Described adhesive is any one in water-fast, that solvent resistance is excellent methyl diphenylene diisocyanate, toluene di-isocyanate(TDI), isophorone diisocyanate or dicyclohexyl methyl hydride diisocyanate type aqueous polyurethane.
Described water cross-linking agent is any one in polycarbodiimide, polyaziridine, epoxy resin or end-sealed type water-based polyurethane.
Described foaming is for putting into baking oven foaming by semi-finished product, temperature range is divided into three sections, leading portion 180 DEG C ~ 185 DEG C, 190 DEG C ~ 195 DEG C, stage casing, back segment 200 DEG C ~ 210 DEG C, and foamed time is 120 ~ 150s.
Tool of the present invention has the following advantages:
Half polyurethane leather that the present invention produces is soft, comfortable, ventilative, moisture-inhibiting, and in product leather, VOC content is lower than 5mmg/kg, and other performance all reaches or is better than industry standard.
The environmental pollution adopting water-based material replace solvents shaped material to cause from source elimination organic solvent, saves a large amount of organic solvent resource, eliminates disaster hidden-trouble, significantly improve labourer's working environment, be conducive to the sustainable development of industry.
Water-based material replace solvents shaped material, meets ecological half PU of European Union and removes from office requirement, improve half PU and remove from office Products Eco grade and competitiveness in the international market.
Specific embodiments
Below by embodiment, the present invention is specifically described.What be necessary to herein means out is that the present embodiment is only used to further illustrate the present invention, and can not be interpreted as limiting the scope of the invention, the person skilled in the art in this field can make some nonessential improvement and adjustment according to the content of foregoing invention.
Embodiment 1
In a kind of exemplary embodiment of the present invention, a kind of environment-friendly polyurethane leather, comprise super fine nonwoven fabric, the bottom covered on nonwoven fabric, and the surface layer covered on bottom, wherein, surface layer comprises at least 4 layers and scrapes by slurry painting the coating formed, and each slurry comprises: aqueous polyurethane, water and aqueous promoter.
Preferably, in the environment-friendly water-based synthetic leather of above-mentioned super fibre, surface layer comprises 4 layers of coating, is respectively: tack coat, the first intermediate layer, the second intermediate layer and superficial layer.Tack coat covers above bottom, and the slurry of tack coat comprises following raw material by weight: first waterborne polyurethane resin 80-100 part, water 10-20 part, aqueous promoter 0-5 part; First intermediate layer covers above tack coat, and the slurry in the first intermediate layer comprises following raw material by weight: second waterborne polyurethane resin 80-100 part, water 20-30 part, aqueous promoter 0-5 part; Second intermediate layer covers above the first intermediate layer, and the slurry in the second intermediate layer comprises following raw material by weight: the 3rd waterborne polyurethane resin 80-100 part, water 20-30 part, aqueous promoter 0-5 part; Superficial layer covers above the second intermediate layer, and the slurry of superficial layer comprises following raw material by weight; 4th waterborne polyurethane resin 80-100 part, water 30-40 part, aqueous promoter 0-5 part.Preferably, in the environment-friendly water-based synthetic leather of above-mentioned super fibre, the viscosity of tack coat slurry is 5000-5500CPS; The viscosity of the first intermediate layer slurry is 3000-3500CPS; The viscosity of the second intermediate layer slurry is 2000-2500CPS; The viscosity of surface layer slurry is 1000-1500CPS.
Preferably, above-mentioned aqueous promoter is one or more in water-based thickener, water-based levelling agent, water-based defoamer.The selection of this water-based thickener, water-based levelling agent and/or water-based defoamer raw material and consumption is that those skilled in the art through reasonably analyzing and can obtaining, can not describe in detail at this.
Preferably, in above-mentioned preparation method, dry method veneer is further comprising the steps: the preparation of superficial layer, comprise the following steps: after the 4th waterborne polyurethane resin high-speed stirred 30-60min, at temperature is 50-70 DEG C, add aqueous promoter, after stirring 15-20min again, add water and be modulated into the surface layer slurry that viscosity is 1000-1500CPS, surface layer slurry gapless is coated with and scrapes in carrier side, form the coating of 1-2 silk, dry, form superficial layer; The preparation in the second intermediate layer, comprise the following steps: after the 3rd waterborne polyurethane resin high-speed stirred 30-60min, at temperature is 50-70 DEG C, add aqueous promoter, after stirring 15-20min again, add water and be modulated into the second intermediate layer slurry that viscosity is 2000-2500CPS, the second intermediate layer slurry is coated with and scrapes on superficial layer, form the coating of 8-12 silk, dry formation second intermediate layer; The preparation in the first intermediate layer, comprise the following steps: after the second waterborne polyurethane resin high-speed stirred 30-60min, at temperature is 50-70 DEG C, add aqueous promoter, after stirring 15-20min again, add water and be modulated into the first intermediate layer slurry that viscosity is 3000-3500CPS, the first intermediate layer slurry is coated with and scrapes on the second intermediate layer, form the coating of 8-12 silk, dry formation first intermediate layer; The preparation of tack coat, comprise the following steps: after the first waterborne polyurethane resin high-speed stirred 30-60min, at temperature is 50-70 DEG C, add aqueous promoter, after stirring 15-20min again, add water and be modulated into the slurry that viscosity is 5000-5500CPS, tack coat slurry is coated with and scrapes on the intermediate layer, form the tack coat of 8-12 silk.
In the present invention, if the aqueous promoter added comprises water-based levelling agent, water-based thickener and water-based defoamer, first add water-based levelling agent and water-based thickener simultaneously, stir after 15-20 minute, add water-based defoamer, high-speed stirred 2-3 minute, static 10-15 minute, to reduce the bubble in slurry, the intensity of the coating prepared by enhancing.
In the present invention, above-mentioned each layer slurry can also filter after making, and can pass through employing 200 object filter screen filtration 2-3 just, to make particle in slurry evenly fine and smooth, and the feel of the synthetic leather prepared by enhancing.
Adopt this preparation method, it is even that various slurry mixes, and the strength of coating of generation is good, is conducive to the synthetic leather preparing high-quality.
Preferably, above-mentioned dry method veneer is further comprising the steps: in the preparation process of superficial layer, the step of drying comprises further: run being coated with the carrier side of scraping surface layer slurry with the speed of 8-9m/min, respectively through 65-75 DEG C, 75-85 DEG C temperature section, be preferably 70 DEG C, 80 DEG C temperature sections progressively to heat up oven dry, the length of each temperature section is 3m, and rotation speed of fan is 300 revs/min; In the preparation process in the second intermediate layer, the step of drying comprises further: run being coated with the carrier side of scraping the second intermediate layer slurry with the speed of 8-9m/min, respectively through 65-75 DEG C, 70-80 DEG C, 75-85 DEG C, 80-90 DEG C temperature section, be preferably 70 DEG C, 75 DEG C, 80 DEG C, 85 DEG C temperature sections progressively to heat up oven dry, the length of each temperature section is 4m, and rotation speed of fan is 400 revs/min; In the preparation process in the first intermediate layer, the step of drying comprises further: painting scraped and run with the speed of 8-9m/min by the carrier side of the first intermediate layer slurry, respectively through 70-80 DEG C, 75-85 DEG C, 80-90 DEG C, 85-95 DEG C, be preferably 75 DEG C, 80 DEG C, 85 DEG C, 90 DEG C temperature section sections progressively to heat up oven dry, the length of each temperature section is 4m, and rotation speed of fan is 500 revs/min;
This mode of drying that progressively heats up, be conducive to the waterborne polyurethane resin film forming gradually making to be not easy film forming, every one deck coating all obtains good film forming characteristics, is more conducive to the synthetic leather preparing high-quality.And these temperature requirements are all the scopes that existing synthetic leather production equipment can reach, existing synthetic leather production equipment can be adopted directly to produce this Waterborne synthetic leather, decrease equipment cost.
Embodiment 2
The preparation of aqueous polyurethane surface layer slurry
By the aqueous covercoat of modulus 30 polyurethane 100 parts, aqueous black mill base 20 parts, water-based levelling agent Silok Leveling8255,0.2 part, water-based defoamer Foamex800,0.1 part, water-based thickener COSIE FT-835,0.3 part, polycarbodiimide crosslinkers mixes by 2 parts, being made into viscosity is 2500mPa.s (temperature 25 DEG C, as follows) surface layer slurry, filters for subsequent use;
The preparation of PVC foam layer slurry
Dioctyl phthalate 20 parts, 100 parts, polyvinyl chloride powder, toner 5 parts, Celogen Az (AC) blowing agent 15 parts, stearate 4 parts are mixed, is made into foaming layer slurry;
The preparation of aqueous adhesive
By aqueous polyurethane adhesive 100 parts, water-based thickener COSIE FT-835,0.5 part mixes, levelling agent Silok Leveling8255,0.2 part, is made into the aqueous adhesive that viscosity is 5000mPa.s;
The preparation of waterborne surface treatment agent
By the aqueous polyurethane gloss oil 100 parts of modulus 60MPa, water-based thickener COSIE FT-835,0.5 part mixes, water-based levelling agent Silok Leveling8255,0.2 part, water-based polyaziridine crosslinking agent 2.5 parts, p-aminobenzoic acid n-propyl hand feeling agent 5 parts, being made into viscosity is 1200mPa.s waterborne surface treatment agent, filters for subsequent use;
Half PU removes from office the manufacture of crust leather
Surface layer is scraped in painting
Adopt straight coating method, be coated with by aqueous polyurethane surface layer slurry and scrape in release liners, coating layer thickness control 0.07mm, then put into baking oven dry, oven temperature is interval and be set to 90 DEG C respectively, 60s drying time; 120 DEG C, 30s;
PVC foam layer is scraped in painting
Surface layer basis is coated with and scrapes PVC foam layer slurry, coating layer thickness controls at 0.14mm, then puts into baking oven and plastifies, and oven temperature interval and fusion time arrange and be respectively 150 DEG C, fusion time 60s;
Adhesive linkage is scraped in painting
Foaming layer is coated with and scrapes bonded adhesives, thickness of adhibited layer control 0.07mm, enters baking oven, dries 90s to half-dried, then fit with base cloth in temperature 110 DEG C, and paper, leather are separated;
Foaming
Above-mentioned semi-finished product are put into baking oven foaming, temperature range is divided into three sections, leading portion 180 DEG C, 190 DEG C, stage casing, back segment 210 DEG C, and foamed time is 120s.
Press the semi-finished product after foaming through common process embossing, then adopt three editions table place machines to carry out table place, the starching amount of table place agent controls at 40g/m 2, baking temperature and time are respectively 140 DEG C, 90s, and the leather base behind table place is rubbed after line, drying, gage through routine and got product.

Claims (7)

1. an environment-friendly polyurethane leather, comprise super fine nonwoven fabric, the bottom covered on described nonwoven fabric, and the surface layer, foam polyvinyl chloride layer, the water-based adhesive linkage that cover on described bottom, it is characterized in that: after half polyurethane leather semi-finished product foaming embossing, adopt three editions table place machines to carry out surface treatment, the starching amount of waterborne surface treatment agent is 40 ~ 60g/m 2, baking temperature and time are respectively 140 ~ 150 DEG C, 60 ~ 90s, and the leather base behind table place gets product after rubbing line, drying, gage, and described surface layer comprises 4 layers of coating, is respectively:
Tack coat, covers above described bottom, and the slurry of described tack coat comprises following raw material by weight:
First waterborne polyurethane resin 80-100 part, water 10-20 part, aqueous promoter 0-5 part;
First intermediate layer, covers above described tack coat, and the slurry in described first intermediate layer comprises following raw material by weight:
Second waterborne polyurethane resin 80-100 part, water 20-30 part, aqueous promoter 0-5 part;
Second intermediate layer, cover above described first intermediate layer, the slurry in described second intermediate layer comprises following raw material by weight:
3rd waterborne polyurethane resin 80-100 part, water 20-30 part, aqueous promoter 0-5 part;
Superficial layer, cover above described second intermediate layer, the slurry of described superficial layer comprises following raw material by weight;
4th waterborne polyurethane resin 80-100 part, water 30-40 part, aqueous promoter 0-5 part;
Described foam polyvinyl chloride layer slurry comprises following raw material by weight:
Dioctyl phthalate 10 ~ 20 parts, 100 parts, polyvinyl chloride powder, toner 2 ~ 5 parts, azodicarbonamide foaming agent 5 ~ 15 parts, stearate 2 ~ 4 parts are mixed, is made into foaming layer slurry;
Described water-based adhesive linkage comprises following raw material by weight:
Aqueous adhesive 100 parts, water-based thickener 0.5 ~ 0.8 part are mixed, water-based levelling agent 0.2 ~ 0.4 part, be made into the aqueous adhesive that viscosity is 4500 ~ 5000mPa.s;
Described waterborne surface treatment agent comprises following raw material by weight:
By aqueous polyurethane gloss oil 100 parts, water-based thickener 0.5 ~ 0.8 part, water-based levelling agent 0.2 ~ 0.4 part, water cross-linking agent 2 ~ 5 parts, feel modifying agent 2 ~ 5 parts mixes, be made into the waterborne surface treatment agent that viscosity is 1000 ~ 1500mPa.s, described first waterborne polyurethane resin is modulus is 25-35kg/cm 2, molecular weight is 0.5 × 10 5-0.6 × 10 5the polyurethane resin of Mr; Described second waterborne polyurethane resin is modulus is 55-65kg/cm 2, molecular weight is 0.6 × 10 5-0.7 × 10 5polyurethane resin; Described 3rd waterborne polyurethane resin is modulus is 55-65kg/cm 2, molecular weight is 0.6 × 10 5-0.7 × 10 5polyurethane resin; Described 4th waterborne polyurethane resin is modulus is 65-75kg/cm 2, molecular weight 0.7 × 10 5-0.8 × 10 5polyurethane resin.
2. a kind of environment-friendly polyurethane leather according to claim 1, is characterized in that: described aqueous promoter is one or more in water-based thickener, water-based levelling agent, water-based defoamer.
3. a kind of environment-friendly polyurethane leather according to claim 1, is characterized in that: adhesive is any one in water-fast, that solvent resistance is excellent methyl diphenylene diisocyanate, toluene di-isocyanate(TDI), isophorone diisocyanate or dicyclohexyl methyl hydride diisocyanate type aqueous polyurethane.
4. a kind of environment-friendly polyurethane leather according to claim 1, it is characterized in that: water cross-linking agent is any one in polycarbodiimide, polyaziridine, epoxy resin or end-sealed type water-based polyurethane, described foaming is for putting into baking oven foaming by semi-finished product, temperature range is divided into three sections, leading portion 180 DEG C ~ 185 DEG C, 190 DEG C ~ 195 DEG C, stage casing, back segment 200 DEG C ~ 210 DEG C, foamed time is 120 ~ 150s.
5. a kind of environment-friendly polyurethane leather according to claim 1, for clothing leather, luggage leather, upper leather, sofa artificial leather or house ornamentation interior decoration leather aspect.
6. prepare the method for a kind of environment-friendly polyurethane leather as claimed in claim 1 for one kind, it is characterized in that preparation process is: by the aqueous covercoat polyurethane 100 parts of modulus 30, aqueous black mill base 20 parts, water-based levelling agent Silok Leveling8255,0.2 part, water-based defoamer Foamex800,0.1 part, water-based thickener COSIE FT-835,0.3 part, polycarbodiimide crosslinkers mixes by 2 parts, being made into viscosity is 2500mPa. surface layer slurry, filters for subsequent use; Dioctyl phthalate 20 parts, 100 parts, polyvinyl chloride powder, toner 5 parts, Celogen Az (AC) blowing agent 15 parts, stearate 4 parts are mixed, is made into foaming layer slurry; By aqueous polyurethane adhesive 100 parts, water-based thickener COSIE FT-835,0.5 part mixes, levelling agent Silok Leveling8255,0.2 part, is made into the aqueous adhesive that viscosity is 5000mPa.s; By the aqueous polyurethane gloss oil 100 parts of modulus 60MPa, water-based thickener COSIE FT-835,0.5 part mixes, water-based levelling agent Silok Leveling8255,0.2 part, water-based polyaziridine crosslinking agent 2.5 parts, p-aminobenzoic acid n-propyl hand feeling agent 5 parts, being made into viscosity is 1200mPa.s waterborne surface treatment agent, filters for subsequent use; Adopt straight coating method, be coated with by aqueous polyurethane surface layer slurry and scrape in release liners, coating layer thickness control 0.07mm, then put into baking oven dry, oven temperature is interval and be set to 90 DEG C respectively, 60s drying time; 120 DEG C, 30s; Surface layer basis is coated with and scrapes PVC foam layer slurry, coating layer thickness controls at 0.14mm, then puts into baking oven and plastifies, and oven temperature interval and fusion time arrange and be respectively 150 DEG C, fusion time 60s; Foaming layer is coated with and scrapes bonded adhesives, thickness of adhibited layer control 0.07mm, enters baking oven, dries 90s to half-dried, then fit with base cloth in temperature 110 DEG C, and paper, leather are separated; Above-mentioned semi-finished product are put into baking oven foaming, temperature range is divided into three sections, leading portion 180 DEG C, 190 DEG C, stage casing, back segment 210 DEG C, foamed time is 120s, press the semi-finished product after foaming through common process embossing, then adopt three editions table place machines to carry out table place, the starching amount of table place agent controls at 40g/m 2, baking temperature and time are respectively 140 DEG C, 90s, and the leather base behind table place is rubbed after line, drying, gage through routine and got product.
7. environment-friendly polyurethane as claimed in claim 1 removes from office the application of removing from office at footwear, sofa, clothing leather, luggage leather and furniture and indoor decoration.
CN201310137494.3A 2013-04-19 2013-04-19 Environmentally-friendly polyurethane leather, preparation method and product thereof CN103255639B (en)

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CN109267352B (en) * 2018-09-04 2021-03-19 温州大学新材料与产业技术研究院 High-solid low-viscosity mirror-surface synthetic leather treating agent and preparation method thereof

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