CN209114234U - A kind of polyurethane leather - Google Patents
A kind of polyurethane leather Download PDFInfo
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- CN209114234U CN209114234U CN201821555641.3U CN201821555641U CN209114234U CN 209114234 U CN209114234 U CN 209114234U CN 201821555641 U CN201821555641 U CN 201821555641U CN 209114234 U CN209114234 U CN 209114234U
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Abstract
The utility model discloses a kind of polyurethane leather, the first polyurethane cover, adhesive layer, the first polyurethane foaming layer, bottom cloth layer, the second polyurethane foaming layer, the second polyurethane covers；The bottom cloth layer is the base fabric for being soaked with polyurethane.The polyurethane leather of the utility model uses two sides foaming technique, and folding line is fine and smooth, and material is stiffening；With 6 layers of structure；Product environmental protection, DMF residual is few, and wear-resisting scratch resistance anti-hydrolytic performance is superior.
Description
Technical field
The utility model relates to field of leather, and in particular to a kind of polyurethane leather.
Background technique
Synthetic Leather (PolyurethaneSynthetic Leather) have intensity it is high, it is wear-resisting, cold-resistant, ventilative,
Ageing-resistant, solvent resistant, it is soft, appearance is beautiful the advantages that, processing performance might as well, be instead of ideal imitative of natural leather
Leather goods, performance are more excellent than PVC leather.Synthetic Leather is widely used in the industries such as clothes, shoemaking, luggage, furniture.
The industrialized preparing process of Synthetic Leather mainly has dry and wet two major classes.
1. dry-process polyurethane synthetic leather
Dry technology for production is (general to apply in release paper by Polyurethane resin slurry blade coating generally using release paper as carrier
One is scraped to secondary), it is put into baking oven heating, drying and removes the polyurethane film that the solvent in resin forms continuous uniform, then thin
Adhesive is scratched on film, is bonded with base fabric, using stripping off device is removed release paper after baking and curing and by finished synthetic
Leather is distinguished coiled with release paper.Polyurethane slurry coating agent, release paper and base fabric are three component parts of dry process.Dry method
The synthetic leather film layer of production is fine and close, product strength is excellent, bonding is secured, and process waste water produced is less, but product wholesomeness
Can be relatively poor, and the exhaust emission that production process generates is serious.
2. wet polyurethane synthetic leather
Wet process, which mainly passes through extruding, keeps slurry fully penetrated into non-woven cloth gap, is then placed in the non-woven cloth solidifying
Gu bath in, utilize " DMF-H2O " system it is miscible so that dimethylformamide (DMF) constantly from resin solution enter coagulating bath,
Water then enters in base fabric and makes PU gradually be changed into gel state by dissolved state to eventually form solid film simultaneously.It is exchanged at this
Since the contraction of the adjustment effect of auxiliary agent and polyurethane will form a large amount of micropores in journey, the multilayer with continuous poriferous layer is obtained
Structural body, so the synthetic leather of wet production has good moisture-inhibiting, permeability, it is soft, plentiful, slim and graceful, more it is imbued with
The style and appearance of natural leather.
Current polyurethane leather or polyurethane leather product there is problems:
1. single side foams, it can not accomplish that two sides folding line is fine and smooth；
2.DMF solvent residual amount is big, and product is not environmentally, and harmful to health；
3. foaming layer abscess is uneven, not fine and close, product stiffness is inadequate；
4. thicker product, such as thickness 1.75mm or more, essentially by two kinds of material composite moldings, the work of two kinds of Material claddings
Skill, processing, labour cost are contour；
5. scratch resistance wear-resisting property is bad, product anti-hydrolytic performance is low, is easy dusting scaling；
If 6. first using single side foaming dry-type processing after, product poor air permeability；Another side foaming layer coating, solvent volatilize not
It goes out, product surface can be caused rotten face by solvent corrosion, if improving product quality, complex procedures, equipment is expensive, at high cost.
Based on the above situation, the utility model proposes a kind of polyurethane leathers can effectively solve problem above.
Utility model content
The purpose of this utility model is to provide a kind of polyurethane leathers.The polyurethane leather of the utility model uses two sides
Foaming technique, folding line is fine and smooth, and material is stiffening；With 6 layers of structure；Product environmental protection, DMF residual is few, wear-resisting scratch resistance anti-hydrolytic performance
It is superior.
The utility model is achieved through the following technical solutions:
A kind of polyurethane leather, the first polyurethane cover, adhesive layer, the first polyurethane foaming layer, bottom cloth layer, the second poly- ammonia
Ester foaming layer, the second polyurethane cover；The bottom cloth layer is the base fabric for being soaked with polyurethane.
The utility model has 6 layers of structure；Two sides foaming, two sides foaming layer uniform foam cell, densification, folding line is fine and smooth, material
It is stiffening；The technique of alternative two kinds of Material claddings is integrally formed, and reduces labour cost；Scratch resistance wear-resisting property is superior, and product is water-fast
It is high to solve performance, up to 3-5 not dusting not scaling；First polyurethane cover and the second polyurethane cover may be selected different release
Paper lines, different colors, make product table serve as a lookout lattice and effect diversification, therefore, two sides decorative pattern can be random according to customer demand
Collocation.
As a preferred embodiment, the polyurethane impregnated slurry includes the raw material of following parts by weight: polyurethane resin 100
Part, 100-180 parts of dimethylformamide, 1-10 parts of wet process mill base；The viscosity of the polyurethane impregnated slurry is 500-
1500cps/25℃；
Dimethylformamide described here is solvent, and suitable viscosity is adjusted after dissolving resin；The mill base is for adjusting face
Color can adjust dosage according to color effects needs.The above proportion can better ensure that the performance of product and easy to process.
As a preferred embodiment, first polyurethane foaming layer includes the raw material of following parts by weight: polyurethane resin
100 parts, 80-120 parts of dimethylformamide, 40-60 parts of calcium carbonate, 0.1-1 parts of defoaming agent, 0.5-2 parts of water washing assistant and water, wet process color
1-10 parts of slurry；After mixing, viscosity is 8000-20000cps/25 DEG C to the raw material of first polyurethane foaming layer；It is described to disappear
Infusion is any one or more in silicone emulsion, the fatty acid ester compounded object of higher alcohols and dimethyl silicone polymer；Washing helps
Agent is organic silicon water washing assistant and water；
Dimethylformamide described here is solvent, and suitable viscosity is adjusted after dissolving resin；Calcium carbonate is for adjusting bubble
Hole size and cell density；The defoaming agent and water washing assistant and water can be defoaming agent and water washing assistant and water commonly used in the art, use
Speed is washed in improving, keeps cleaning cleaner, DMF residual is less；The mill base, can be according to color effects needs for adjusting color
To adjust dosage.The above proportion can better ensure that the performance of product and easy to process.
As a preferred embodiment, first polyurethane cover includes the raw material of following parts by weight: polyurethane resin 100
Part, 30-70 parts of dimethylformamide, 20-40 parts of ethyl acetate, 15-35 parts of dry method mill base；The original of first polyurethane cover
After mixing, viscosity is 3000-6000cps/25 DEG C to material；
Dimethylformamide and ethyl acetate described here are solvents, and suitable viscosity is adjusted after dissolving resin；The color
Slurry can adjust dosage according to color effects needs for adjusting color.The above proportion can better ensure that product performance and
It is easy to process.
As a preferred embodiment, the adhesive layer includes the raw material of following parts by weight: 100 parts of polyurethane resin, diformazan
20-40 parts of base formamide, 10-40 parts of ethyl acetate, 15-35 parts of dry method mill base；The raw material of the adhesive layer after mixing, glues
Degree is 10000-15000cps/25 DEG C；
Dimethylformamide and ethyl acetate described here are solvents, and suitable viscosity is adjusted after dissolving resin；The color
Slurry can adjust dosage according to color effects needs for adjusting color.The above proportion can better ensure that product performance and
It is easy to process.
As a preferred embodiment, second polyurethane cover includes the raw material of following parts by weight: polyurethane resin 100
Part, 30-70 parts of dimethylformamide, 20-40 parts of ethyl acetate, 15-35 parts of mill base；The raw material of second polyurethane cover is mixed
After closing uniformly, viscosity is 3000-6000 cps/25 DEG C；
Dimethylformamide and ethyl acetate described here are solvents, and suitable viscosity is adjusted after dissolving resin；The color
Slurry can adjust dosage according to color effects needs for adjusting color.The above proportion can better ensure that product performance and
It is easy to process.
As a preferred embodiment, second polyurethane foaming layer includes the raw material of following parts by weight: end contains -0H
100 parts of base polyurethane prepolymer for use as, end contain 0.1-1 parts of 60-100 parts of base polyurethane prepolymer for use as, the catalyst of-NCO；The catalyst is
Bismuth carboxylate micromolecular compound or bismuth carboxylate micromolecular mixture.
By selecting base polyurethane prepolymer for use as and end base polyurethane prepolymer for use as containing-NCO of the end containing -0H online as AB material
Reaction, product environmental protection, health, no DMF solvent residual.The above proportion can better ensure that the performance of product and easy to process.
As a preferred embodiment, first polyurethane cover with a thickness of 0.05-0.15mm.
The first polyurethane cover texture described in this way and feeling is better.
As a preferred embodiment, the sum of thickness of the bottom cloth layer and the first polyurethane foaming layer is 1.25-2.45mm.
Make the polyurethane leather of the utility model in this way, there is better flexibility and gas permeability, whole texture and feel
More preferably.
As a preferred embodiment, the base fabric in the bottom cloth layer is 1.0-1.2mm tWarp Knitted Fabrics, grammes per square metre 300-
400g/m。
The performance of product and easy to process can be better ensured that in this way.
As a preferred embodiment, second polyurethane foaming layer with a thickness of 0.15-0.35mm.
The second polyurethane foaming layer described in this way and combine the first polyurethane cover after, material stiffness is more preferable, texture and
Feeling is better.
As a preferred embodiment, second polyurethane cover with a thickness of 0.05-0.15mm.
The first polyurethane cover texture described in this way and feeling is better.
The utility model also provides a kind of preparation method of polyurethane leather, includes the following steps:
(1) base fabric is placed in polyurethane impregnation slurry, then is squeezed by squeezing rod, the extruding rod spacing is 0.3-
0.6mm obtains bottom cloth layer；
(2) the first polyurethane foam slurry is scratched on step (1) resulting bottom cloth layer, is subsequently placed in and fills dimethyl methyl
It solidifies, then through multiple washing trough washeries, then is dried in amide-aqueous systems coagulating basin, baking oven temperature used in the drying
Degree control is 100-180 DEG C, obtains the wet half-finished product of the+the first polyurethane foaming layer of bottom cloth layer；
(3) release paper unreels, and coats the first polyurethane cover slurry, coating thickness 0.10- on release paper surface
0.25mm, Drying and cooling, oven temperature used are 60 DEG C~150 DEG C, obtain the first polyurethane cover；
Baking oven described here is at least 2 sections of baking ovens, and such as Drying and cooling, oven temperature used is 60 DEG C~150 DEG C, institute
It is 3 sections of baking ovens with baking oven, temperature is followed successively by 60 DEG C, 90 DEG C, 120 DEG C；Suitable coating and the control of stoving process conditional parameter,
Better ensure that the synthesis service performance of the polyurethane leather of the first polyurethane cover and the utility model.
(4) binding paste is coated on resulting first polyurethane cover of step (3), preliminary drying is half-dried, baking oven temperature used
Degree is 60 DEG C~120 DEG C, is pasted with the first polyurethane foam layer surface of the wet half-finished product of the+the first polyurethane foaming layer of bottom cloth layer
It closes, Drying and cooling, oven temperature used is 60 DEG C~150 DEG C, removes release paper, and release paper lines is transferred to the first polyurethane
The surface of surface layer obtains fitting semi-finished product；
Baking oven described here is at least 2 sections of baking ovens, and if preliminary drying is half-dried, oven temperature used is 80 DEG C~120 DEG C, institute
It is 3 sections of baking ovens with baking oven, temperature is followed successively by 80 DEG C, 90 DEG C, 100 DEG C；Drying and cooling, oven temperature used be 60 DEG C~
150 DEG C, baking oven used is 4 sections of baking ovens, and temperature is followed successively by 60 DEG C, 75 DEG C, 90 DEG C, 105 DEG C；Suitable coating and stoving process
Conditional parameter control, better ensures that the synthesis service performance of the polyurethane leather of fitting semi-finished product and the utility model.
(5) release paper unreels, and coats the second polyurethane cover slurry, coating thickness 0.10- on release paper surface
0.25mm, Drying and cooling, oven temperature used are 60 DEG C~150 DEG C, obtain the second polyurethane cover；
Baking oven described here is at least 2 sections of baking ovens, and such as Drying and cooling, oven temperature used is 60 DEG C~150 DEG C, institute
It is 4 sections of baking ovens with baking oven, temperature is followed successively by 60 DEG C, 85 DEG C, 110 DEG C, 135 DEG C；Suitable coating and stoving process condition ginseng
Number control, better ensures that the synthesis service performance of the polyurethane leather of the second polyurethane cover and the utility model.
(6) the second polyurethane foam slurry is coated on resulting second polyurethane cover of step (5), coating thickness is
0.2-0.6mm, preliminary drying half are crosslinked half and foam, and oven temperature used is 60 DEG C -150 DEG C, and the residence time is 100- in baking oven
120s is bonded with another surface of the bottom layer for being bonded semi-finished product, dries crosslinking curing, and oven temperature used is 120-150 DEG C,
Maturation, maturation room temperature are 50-100 DEG C, and the maturation time is 6-72h, removes release paper, and release paper lines is transferred to the second poly- ammonia
The surface of ester surface layer, obtains polyurethane leather；
Baking oven described here is at least 2 sections of baking ovens, is foamed if preliminary drying half is crosslinked half, and oven temperature used is 60 DEG C-
150 DEG C, baking oven used is 4 sections of baking ovens, and temperature is followed successively by 60 DEG C, 80 DEG C, 100 DEG C, 120 DEG C；Suitable coating and drying work
The control of skill conditional parameter better ensures that the second polyurethane foaming layer uniform foam cell, densification, and abscess is fine and close, and product folding line is just thin
It is greasy；By the way that later period drying temperature is increased to 120-150 DEG C, better ensure that DMF content is less than 1000ppm in product.
Wherein, the baking oven is at least 2 sections of baking ovens, and every section of oven temperature successively increases, by material to be dried in temperature
Successively dried in raised environment；The first polyurethane foam slurry is that the raw material mixing of first polyurethane foaming layer is equal
Gained after even；The first polyurethane cover slurry be first polyurethane cover raw material after mixing gained；It is described
Binding paste be the adhesive layer raw material after mixing gained；The second polyurethane cover slurry is the second polyurethane face
Layer raw material after mixing gained；The second polyurethane foam slurry is that the raw material of second polyurethane foaming layer mixes
Gained after uniformly.
As a preferred embodiment, temperature control is at 25-32 DEG C in coagulating basin in step (2), dimethylformamide concentration
Control is in 18-22%；Temperature control is at 40-80 DEG C in the rinsing bowl, dimethylformamide concentration control in the last one rinsing bowl
System is below 1%.
Suitable solidification and the control of washing process conditional parameter, better ensure that the first polyurethane foaming layer uniform foam cell,
Densification, abscess is fine and close, and product folding line is just fine and smooth；By in the last one rinsing bowl dimethylformamide concentration control 1% with
Under, better ensure that DMF content is less than 1000ppm in product.
As a preferred embodiment, the first polyurethane foam slurry is scratched described in step (2), is scratched with a thickness of 1.8-
2.2mm；The wet half-finished product of+the first polyurethane foaming layer of bottom cloth layer with a thickness of 1.25-2.45mm, breadth 144cm with
On.
The polyurethane leather of the utility model compared with prior art, have the following advantages that and the utility model has the advantages that
1, two sides foaming structure, two sides folding line are fine and smooth；
2, DMF solvent residual content is less than 1000ppm, and product environmental protection meets REACH standard, and environmental-friendly；
3, two sides foaming layer uniform foam cell, densification, material are stiffening；
4, thickness 1.75mm or more, the technique of alternative two kinds of Material claddings are integrally formed, and reduce labour cost；
5, the second polyurethane foaming layer is to expect that online reaction is realized by new technology AB, product environmental protection, and no DMF solvent is residual
It stays；
6, scratch resistance wear-resisting property is superior, and product anti-hydrolytic performance is high, up to 3-5 not dusting not scaling；
7, different release paper lines may be selected in the first polyurethane cover and the second polyurethane cover, and different colors makes
Product table serve as a lookout lattice and effect diversification, therefore, two sides decorative pattern can arbitrarily arrange in pairs or groups according to customer demand；
8, the first polyurethane cover, adhesive layer and the first polyurethane foaming layer process are first completed, if positive foaming layer
It is common dry-type processing, the remaining DMF solvent in the inside does not just volatilize not go out, and product surface quality problem is caused, so second
The solvent-free online reaction of polyurethane foaming layer, solves this problem in that.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of polyurethane leather described in the utility model.
Specific embodiment
The utility model is described in further detail below with reference to embodiment, but the embodiments of the present invention is not
It is limited to this.
Test method described in following embodiments or test method are unless otherwise specified conventional method；The examination
Agent and material are obtained from routine business approach, or prepare in conventional manner unless otherwise specified.
Embodiment 1:
A kind of polyurethane leather successively includes: the first polyurethane cover 1, adhesive layer 2, the first polyurethane foaming layer 3, bottom
Layer of cloth 4, the second polyurethane foaming layer 5, the second polyurethane cover 6；The bottom cloth layer is the base fabric for being soaked with polyurethane.
Embodiment 2:
A kind of polyurethane leather successively includes: the first polyurethane cover 1, adhesive layer 2, the first polyurethane foaming layer 3, bottom
Layer of cloth 4, the second polyurethane foaming layer 5, the second polyurethane cover 6；The bottom cloth layer is the base fabric for being soaked with polyurethane；
Preferably, first polyurethane cover 1 with a thickness of 0.05-0.15mm；
Preferably, the sum of thickness of the bottom cloth layer 4 and the first polyurethane foaming layer 3 is 1.25-2.45mm；
Preferably, the base fabric in the bottom cloth layer 4 is 1.0-1.2mm tWarp Knitted Fabrics, grammes per square metre 300-400g/m；
Preferably, second polyurethane foaming layer 5 with a thickness of 0.15-0.35mm；
Preferably, second polyurethane cover 6 with a thickness of 0.05-0.15mm.
Embodiment 3:
A kind of polyurethane leather, the first polyurethane cover, adhesive layer, the first polyurethane foaming layer, bottom cloth layer, the second poly- ammonia
Ester foaming layer, the second polyurethane cover；The bottom cloth layer is that base fabric is formed after the impregnation of polyurethane impregnated slurry.
The polyurethane impregnated slurry includes the raw material of following parts by weight: 100 parts of polyurethane resin, dimethylformamide
1200 parts, 1 part of wet process mill base；The viscosity of the polyurethane impregnated slurry is 1000cps/25 DEG C；
First polyurethane foaming layer includes the raw material of following parts by weight: 100 parts of polyurethane resin, dimethylformamide
80 parts, 40 parts of calcium carbonate, 0.1 part of defoaming agent, 0.5 part of water washing assistant and water, 1 part of wet process mill base；First polyurethane foaming layer
After mixing, viscosity is 15000cps/25 DEG C to raw material；The defoaming agent is silicone emulsion；Water washing assistant and water is organic silicon water
Wash auxiliary agent；
First polyurethane cover includes the raw material of following parts by weight: 100 parts of polyurethane resin, dimethylformamide 45
Part, 20 parts of ethyl acetate, 25 parts of dry method mill base；After mixing, viscosity is the raw material of first polyurethane cover
4000cps/25℃；
The adhesive layer includes the raw material of following parts by weight: 100 parts of polyurethane resin, 20 parts of dimethylformamide, acetic acid
15 parts of ethyl ester, 15 parts of dry method mill base；After mixing, viscosity is 12000cps/25 DEG C to the raw material of the adhesive layer；
Second polyurethane cover includes the raw material of following parts by weight: 100 parts of polyurethane resin, dimethylformamide 45
Part, 20 parts of ethyl acetate, 30 parts of mill base；After mixing, viscosity is 4000 cps/25 to the raw material of second polyurethane cover
℃；
Second polyurethane foaming layer includes the raw material of following parts by weight: end contains the base polyurethane prepolymer for use as 100 of -0H
Part, end contain 0.5 part of 68 parts of base polyurethane prepolymer for use as, the catalyst of-NCO；The catalyst is bismuth carboxylate micromolecular compound；
First polyurethane cover with a thickness of 0.05mm；
The sum of thickness of the bottom cloth layer and the first polyurethane foaming layer is 1.35mm；
Base fabric in the bottom cloth layer is 1.0 tWarp Knitted Fabrics, grammes per square metre 300g/m；
Second polyurethane foaming layer with a thickness of 0.15mm；
Second polyurethane cover with a thickness of 0.05mm；
A kind of preparation method of polyurethane leather includes the following steps:
(1) base fabric being placed in polyurethane impregnation slurry, then is squeezed by squeezing rod, the extruding rod spacing is 0.4mm,
Obtain bottom cloth layer；
(2) the first polyurethane foam slurry is scratched on step (1) resulting bottom cloth layer, is subsequently placed in and fills dimethyl methyl
It solidifies, then through multiple washing trough washeries, then is dried in amide-aqueous systems coagulating basin, baking oven temperature used in the drying
Degree control is 100-180 DEG C, obtains the wet half-finished product of the+the first polyurethane foaming layer of bottom cloth layer；
(3) release paper unreels, and coats the first polyurethane cover slurry on release paper surface, coating thickness 0.15mm dries
Dry and cold oven temperature used is 60 DEG C~150 DEG C, obtains the first polyurethane cover；
(4) binding paste is coated on resulting first polyurethane cover of step (3), preliminary drying is half-dried, baking oven temperature used
Degree is 60 DEG C~120 DEG C, is pasted with the first polyurethane foam layer surface of the wet half-finished product of the+the first polyurethane foaming layer of bottom cloth layer
It closes, Drying and cooling, oven temperature used is 60 DEG C~150 DEG C, removes release paper, and release paper lines is transferred to the first polyurethane
The surface of surface layer obtains fitting semi-finished product；
(5) release paper unreels, and coats the second polyurethane cover slurry on release paper surface, coating thickness 0.15mm dries
Dry and cold oven temperature used is 60 DEG C~150 DEG C, obtains the second polyurethane cover；
(6) the second polyurethane foam slurry is coated on resulting second polyurethane cover of step (5), coating thickness is
0.5mm, preliminary drying half are crosslinked half and foam, and oven temperature used is 60 DEG C -150 DEG C, and the residence time is 120s in baking oven, with patch
Another surface fitting of bottom layer for closing semi-finished product, dries crosslinking curing, oven temperature used is 120-150 DEG C, maturation, maturation
Room temperature is 70 DEG C, and the maturation time is 36h, removes release paper, and release paper lines is transferred to the surface of the second polyurethane cover, obtains
To polyurethane leather；
Wherein, the baking oven is at least 2 sections of baking ovens, and every section of oven temperature successively increases, by material to be dried in temperature
Successively dried in raised environment；The first polyurethane foam slurry is that the raw material mixing of first polyurethane foaming layer is equal
Gained after even；The first polyurethane cover slurry be first polyurethane cover raw material after mixing gained；It is described
Binding paste be the adhesive layer raw material after mixing gained；The second polyurethane cover slurry is the second polyurethane face
Layer raw material after mixing gained；The second polyurethane foam slurry is that the raw material of second polyurethane foaming layer mixes
Gained after uniformly；
At 25 DEG C, dimethylformamide concentration is controlled 18% for temperature control in coagulating basin in step (2)；The rinsing bowl
Middle temperature control dimethylformamide concentration in 60 DEG C, the last one rinsing bowl controls below 0.5%；
The first polyurethane foam slurry is scratched described in step (2), is scratched with a thickness of 1.9mm；The bottom cloth layer+the first is poly-
The wet half-finished product of urethane foaming layer with a thickness of 1.45mm, breadth 146cm.
Embodiment 4:
A kind of polyurethane leather, the first polyurethane cover, adhesive layer, the first polyurethane foaming layer, bottom cloth layer, the second poly- ammonia
Ester foaming layer, the second polyurethane cover；The bottom cloth layer is that base fabric is formed after the impregnation of polyurethane impregnated slurry；
The polyurethane impregnated slurry includes the raw material of following parts by weight: 100 parts of polyurethane resin, dimethylformamide
160 parts, 5 parts of wet process mill base；The viscosity of the polyurethane impregnated slurry is 800cps/25 DEG C；
First polyurethane foaming layer includes the raw material of following parts by weight: 100 parts of polyurethane resin, dimethylformamide
80 parts, 40 parts of calcium carbonate, 0.1 part of defoaming agent, 0.5 part of water washing assistant and water, 1 part of wet process mill base；First polyurethane foaming layer
After mixing, viscosity is 8000cps/25 DEG C to raw material；The defoaming agent is silicone emulsion, the fatty acid ester compounded object of higher alcohols；
Water washing assistant and water is organic silicon water washing assistant and water；
First polyurethane cover includes the raw material of following parts by weight: 100 parts of polyurethane resin, dimethylformamide 65
Part, 30 parts of ethyl acetate, 30 parts of dry method mill base；After mixing, viscosity is the raw material of first polyurethane cover
3000cps/25℃；
The adhesive layer includes the raw material of following parts by weight: 100 parts of polyurethane resin, 30 parts of dimethylformamide, acetic acid
25 parts of ethyl ester, 30 parts of dry method mill base；After mixing, viscosity is 10000cps/25 DEG C to the raw material of the adhesive layer；
Second polyurethane cover includes the raw material of following parts by weight: 100 parts of polyurethane resin, dimethylformamide 65
Part, 30 parts of ethyl acetate, 30 parts of mill base；After mixing, viscosity is 3000 cps/25 to the raw material of second polyurethane cover
℃；
Second polyurethane foaming layer includes the raw material of following parts by weight: end contains the base polyurethane prepolymer for use as 100 of -0H
Part, end contain 0.3 part of 78 parts of base polyurethane prepolymer for use as, the catalyst of-NCO；The catalyst is bismuth carboxylate micromolecular compound
Or bismuth carboxylate micromolecular mixture；
First polyurethane cover with a thickness of 0.15mm；
The sum of thickness of the bottom cloth layer and the first polyurethane foaming layer is 2.45mm；
Base fabric in the bottom cloth layer is 1.2mm tWarp Knitted Fabrics, grammes per square metre 400g/m；
Second polyurethane foaming layer with a thickness of 0.35mm；
Second polyurethane cover with a thickness of 0.15mm；
A kind of preparation method of polyurethane leather, includes the following steps:
(1) base fabric is placed in polyurethane impregnation slurry, then is squeezed by squeezing rod, the extruding rod spacing is 0.4-
0.5mm obtains bottom cloth layer；
(2) the first polyurethane foam slurry is scratched on step (1) resulting bottom cloth layer, is subsequently placed in and fills dimethyl methyl
It solidifies, then through multiple washing trough washeries, then is dried in amide-aqueous systems coagulating basin, baking oven temperature used in the drying
Degree control is 120-180 DEG C, obtains the wet half-finished product of the+the first polyurethane foaming layer of bottom cloth layer；
(3) release paper unreels, and coats the first polyurethane cover slurry, coating thickness 0.15- on release paper surface
0.2mm, Drying and cooling, oven temperature used are 60 DEG C~150 DEG C, obtain the first polyurethane cover；
(4) binding paste is coated on resulting first polyurethane cover of step (3), preliminary drying is half-dried, baking oven temperature used
Degree is 60 DEG C~120 DEG C, is pasted with the first polyurethane foam layer surface of the wet half-finished product of the+the first polyurethane foaming layer of bottom cloth layer
It closes, Drying and cooling, oven temperature used is 60 DEG C~150 DEG C, removes release paper, and release paper lines is transferred to the first polyurethane
The surface of surface layer obtains fitting semi-finished product；
(5) release paper unreels, and coats the second polyurethane cover slurry, coating thickness 0.2mm, drying on release paper surface
Cooling, oven temperature used is 60 DEG C~150 DEG C, obtains the second polyurethane cover；
(6) the second polyurethane foam slurry is coated on resulting second polyurethane cover of step (5), coating thickness is
0.4mm, preliminary drying half are crosslinked half and foam, and oven temperature used is 60 DEG C -150 DEG C, and the residence time is 100-120s in baking oven,
It being bonded with another surface of the bottom layer for being bonded semi-finished product, dries crosslinking curing, oven temperature used is 120-150 DEG C, maturation,
Maturation room temperature is 50 DEG C, and the maturation time is 6h, removes release paper, and release paper lines is transferred to the table of the second polyurethane cover
Face obtains polyurethane leather；
Wherein, the baking oven is at least 2 sections of baking ovens, and every section of oven temperature successively increases, by material to be dried in temperature
Successively dried in raised environment；The first polyurethane foam slurry is that the raw material mixing of first polyurethane foaming layer is equal
Gained after even；The first polyurethane cover slurry be first polyurethane cover raw material after mixing gained；It is described
Binding paste be the adhesive layer raw material after mixing gained；The second polyurethane cover slurry is the second polyurethane face
Layer raw material after mixing gained；The second polyurethane foam slurry is that the raw material of second polyurethane foaming layer mixes
Gained after uniformly；
At 32 DEG C, dimethylformamide concentration is controlled 22% for temperature control in coagulating basin in step (2)；The rinsing bowl
Middle temperature control dimethylformamide concentration in 80 DEG C, the last one rinsing bowl controls below 1%；
The first polyurethane foam slurry is scratched described in step (2), is scratched with a thickness of 2.1mm；The bottom cloth layer+the first is poly-
The wet half-finished product of urethane foaming layer with a thickness of 2mm, breadth 148cm.
Embodiment 5:
A kind of polyurethane leather, the first polyurethane cover, adhesive layer, the first polyurethane foaming layer, bottom cloth layer, the second poly- ammonia
Ester foaming layer, the second polyurethane cover；The bottom cloth layer is that base fabric is formed after the impregnation of polyurethane impregnated slurry；
The polyurethane impregnated slurry includes the raw material of following parts by weight: 100 parts of polyurethane resin, dimethylformamide
135 parts, 2.5 parts of wet process mill base；The viscosity of the polyurethane impregnated slurry is 765cps/25 DEG C；
First polyurethane foaming layer includes the raw material of following parts by weight: 100 parts of polyurethane resin, dimethylformamide
89 parts, 52.5 parts of calcium carbonate, 0.15 part of defoaming agent, 0.75 part of water washing assistant and water, 3.5 parts of wet process mill base；The first polyurethane hair
After mixing, viscosity is 10230cps/25 DEG C to the raw material of alveolar layer；The defoaming agent is dimethyl silicone polymer；Water washing assistant and water
For organic silicon water washing assistant and water；
First polyurethane cover includes the raw material of following parts by weight: 100 parts of polyurethane resin, dimethylformamide 49
Part, 25 parts of ethyl acetate, 22 parts of dry method mill base；After mixing, viscosity is the raw material of first polyurethane cover
4652cps/25℃；
The adhesive layer includes the raw material of following parts by weight: 100 parts of polyurethane resin, 25 parts of dimethylformamide, acetic acid
17.5 parts of ethyl ester, 16.8 parts of dry method mill base；After mixing, viscosity is 11550cps/25 DEG C to the raw material of the adhesive layer；
Second polyurethane cover includes the raw material of following parts by weight: 100 parts of polyurethane resin, dimethylformamide 56
Part, 26.5 parts of ethyl acetate, 22.8 parts of mill base；The raw material of second polyurethane cover after mixing, viscosity 3750
cps/25℃；
Second polyurethane foaming layer includes the raw material of following parts by weight: end contains the base polyurethane prepolymer for use as 100 of -0H
Part, end contain 0.23 part of 74 parts of base polyurethane prepolymer for use as, the catalyst of-NCO；The catalyst is the mixing of bismuth carboxylate micromolecular
Object；
First polyurethane cover with a thickness of 0.08mm；
The sum of thickness of the bottom cloth layer and the first polyurethane foaming layer is 1.66mm；
Base fabric in the bottom cloth layer is 1.15mm tWarp Knitted Fabrics, grammes per square metre 325g/m；
Second polyurethane foaming layer with a thickness of 0.26mm；
Second polyurethane cover with a thickness of 0.11mm；
A kind of preparation method of polyurethane leather, includes the following steps:
(1) base fabric is placed in polyurethane impregnation slurry, then is squeezed by squeezing rod, the extruding rod spacing is
0.47mm obtains bottom cloth layer；
(2) the first polyurethane foam slurry is scratched on step (1) resulting bottom cloth layer, is subsequently placed in and fills dimethyl methyl
It solidifies, then through multiple washing trough washeries, then is dried in amide-aqueous systems coagulating basin, baking oven temperature used in the drying
Degree control is 130-180 DEG C, and baking oven used is 3 sections of baking ovens, and temperature is followed successively by 135 DEG C, 145 DEG C, 155 DEG C；Obtain bottom cloth layer+
The wet half-finished product of first polyurethane foaming layer；
(3) release paper unreels, and coats the first polyurethane cover slurry on release paper surface, coating thickness 0.18mm dries
It is dry and cold but, oven temperature used be 60 DEG C~150 DEG C, baking oven used be 4 sections of baking ovens, temperature be followed successively by 65 DEG C, 85 DEG C,
105℃,125℃；Obtain the first polyurethane cover；
(4) binding paste is coated on resulting first polyurethane cover of step (3), preliminary drying is half-dried, baking oven temperature used
Degree is 80 DEG C~120 DEG C, and baking oven used is 3 sections of baking ovens, and temperature is followed successively by 85 DEG C, 95 DEG C, 105 DEG C；It is poly- with bottom cloth layer+the first
First polyurethane foam layer surface of the wet half-finished product of urethane foaming layer is bonded, Drying and cooling, and oven temperature used is 60
DEG C~150 DEG C, baking oven used is 4 sections of baking ovens, and temperature is followed successively by 65 DEG C, 85 DEG C, 105 DEG C, 125 DEG C；Release paper is removed, it is release
Paper lines is transferred to the surface of the first polyurethane cover, obtains fitting semi-finished product；
(5) release paper unreels, and coats the second polyurethane cover slurry on release paper surface, coating thickness 0.17mm dries
It is dry and cold but, oven temperature used be 60 DEG C~150 DEG C, baking oven used be 4 sections of baking ovens, temperature be followed successively by 65 DEG C, 85 DEG C,
105℃,125℃；Obtain the second polyurethane cover；
(6) the second polyurethane foam slurry is coated on resulting second polyurethane cover of step (5), coating thickness is
0.35mm, preliminary drying half are crosslinked half and foam, and oven temperature used is 60 DEG C -150 DEG C, and baking oven used is 4 sections of baking ovens, temperature according to
Secondary is 65 DEG C, 85 DEG C, 105 DEG C, 125 DEG C；The residence time is 110s in baking oven, with another surface of the bottom layer for being bonded semi-finished product
Crosslinking curing is dried in fitting, and oven temperature used is 130-150 DEG C, and baking oven used is 2 sections of baking ovens, and temperature is followed successively by 135
℃,145℃；Maturation, maturation room temperature are 75 DEG C, and the maturation time is for 24 hours, to remove release paper, and release paper lines is transferred to second
The surface of polyurethane cover, obtains polyurethane leather；
Wherein, the baking oven is at least 2 sections of baking ovens, and every section of oven temperature successively increases, by material to be dried in temperature
Successively dried in raised environment；The first polyurethane foam slurry is that the raw material mixing of first polyurethane foaming layer is equal
Gained after even；The first polyurethane cover slurry be first polyurethane cover raw material after mixing gained；It is described
Binding paste be the adhesive layer raw material after mixing gained；The second polyurethane cover slurry is the second polyurethane face
Layer raw material after mixing gained；The second polyurethane foam slurry is that the raw material of second polyurethane foaming layer mixes
Gained after uniformly；
At 27 DEG C, dimethylformamide concentration is controlled 20.5% for temperature control in coagulating basin in step (2)；The washing
Temperature control dimethylformamide concentration in 55 DEG C, the last one rinsing bowl controls below 0.5% in slot；
The first polyurethane foam slurry is scratched described in step (2), is scratched with a thickness of 2.0mm；The bottom cloth layer+the first is poly-
The wet half-finished product of urethane foaming layer with a thickness of 1.75mm, breadth 150cm.
Embodiment 6:
The polyurethane leather product of the utility model obtained by embodiment 3-5 is tested:
Antifungal gene performance test: product doubling sees wrinkle recovery situation, the poly- ammonia of the utility model after ballast 1kg, 24H
Ester leather scrimp does not have substantially.
The polyurethane leather DMF content of the utility model is less than 1000ppm.
Wear-resisting scratch resistance: front epidermis adds foaming layer, tests 1000 turns of Taber wear-resisting (H-22,1kg), this is practical new
The polyurethane leather surface of type is not broken；Surface is scraped with key chain, the polyurethane leather surface of the utility model is not broken.
Hydrolysis: jungle tests (70 DEG C of * 95RH) 21 days；The polyurethane leather surface of the utility model do not crack, dusting,
Delamination, mouldy, hair mist.
The polyurethane leather of the utility model:
1, two sides foaming structure, two sides folding line are fine and smooth；
2, DMF solvent residual content is less than 1000ppm, and product environmental protection meets REACH standard, and environmental-friendly；
3, two sides foaming layer uniform foam cell, densification, material are stiffening；
4, thickness 1.75mm or more, the technique of alternative two kinds of Material claddings are integrally formed, and reduce labour cost；
5, the second polyurethane foaming layer is to expect that online reaction is realized by new technology AB, product environmental protection, and no DMF solvent is residual
It stays；
6, scratch resistance wear-resisting property is superior, and product anti-hydrolytic performance is high, up to 3-5 not dusting not scaling；
7, different release paper lines may be selected in the first polyurethane cover and the second polyurethane cover, and different colors makes
Product table serve as a lookout lattice and effect diversification, therefore, two sides decorative pattern can arbitrarily arrange in pairs or groups according to customer demand；
8, the first polyurethane cover, adhesive layer and the first polyurethane foaming layer process are first completed, if positive foaming layer
It is common dry-type processing, the remaining DMF solvent in the inside does not just volatilize not go out, and product surface quality problem is caused, so second
The solvent-free online reaction of polyurethane foaming layer solves this problem in that.
The above is only the preferred embodiment of the utility model, not does limit in any form to the utility model
System, any simple modification made by the above technical examples according to the technical essence of the present invention, equivalent variations, each falls within
Within the protection scope of the utility model.
Claims (6)
1. a kind of polyurethane leather, which is characterized in that successively include: the first polyurethane cover (1), adhesive layer (2), the first poly- ammonia
Ester foaming layer (3), bottom cloth layer (4), the second polyurethane foaming layer (5), the second polyurethane cover (6)；The bottom cloth layer (4) is leaching
There is the base fabric of polyurethane.
2. polyurethane leather according to claim 1, which is characterized in that first polyurethane cover (1) with a thickness of
0.05-0.15mm。
3. polyurethane leather according to claim 1, which is characterized in that the bottom cloth layer (4) and the first polyurethane foam
The sum of thickness of layer (3) is 1.25-2.45mm.
4. polyurethane leather according to claim 1, which is characterized in that the base fabric in the bottom cloth layer (4) is 1.0-
1.2mm tWarp Knitted Fabrics, grammes per square metre 300-400g/m.
5. polyurethane leather according to claim 1, which is characterized in that the thickness of second polyurethane foaming layer (5)
For 0.15-0.35mm.
6. polyurethane leather according to claim 1, which is characterized in that second polyurethane cover (6) with a thickness of
0.05-0.15mm。
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| CN201821555641.3U CN209114234U (en) | 2018-09-21 | 2018-09-21 | A kind of polyurethane leather |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109137551A (en) * | 2018-09-21 | 2019-01-04 | 浙江禾欣新材料有限公司 | A kind of high antifungal gene polyurethane leather of two-sided foaming |
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2018
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109137551A (en) * | 2018-09-21 | 2019-01-04 | 浙江禾欣新材料有限公司 | A kind of high antifungal gene polyurethane leather of two-sided foaming |
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