CN211311986U - Cashmere-like polyurethane leather - Google Patents
Cashmere-like polyurethane leather Download PDFInfo
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- CN211311986U CN211311986U CN201922285684.5U CN201922285684U CN211311986U CN 211311986 U CN211311986 U CN 211311986U CN 201922285684 U CN201922285684 U CN 201922285684U CN 211311986 U CN211311986 U CN 211311986U
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Abstract
The utility model provides a cashmere-like polyurethane leather, which comprises a first wet-process polyurethane resin layer, a base cloth layer, a second wet-process polyurethane resin layer, a bonding layer, a polyurethane resin surface layer and a polyurethane resin protective layer which are arranged in sequence; the base cloth layer is cashmere-like base cloth coated with wet-process polyurethane resin. The cashmere-like polyurethane leather has the advantages of high peel strength, high tear strength, good flame retardance, fine crease, higher economic value and good market prospect.
Description
Technical Field
The utility model belongs to the technical field of the leather, a polyurethane leather is related to, especially relate to an imitative cashmere polyurethane leather.
Background
The polyurethane synthetic leather has the advantages of high strength, wear resistance, cold resistance, air permeability, aging resistance, solvent resistance, soft texture, beautiful appearance and the like, has excellent processing performance, and is an ideal textile for replacing natural leather, and the performance of the textile is superior to that of PVC leather, so the polyurethane synthetic leather is widely applied to the industries of clothing, shoemaking, cases, furniture and the like.
The synthetic leather has the advantages of wide raw material sources, low price and good processing performance, and can meet the living pursuit of people, but the defects of hard texture easily appear in the application process of common polyurethane resin, and the defects of difficult elimination of crease marks generated in the bending process, easy local cracking and the like are easily caused under the condition of low temperature.
The industrial production method of the polyurethane synthetic leather mainly comprises a dry method and a wet method. The production process of the dry-process polyurethane synthetic leather generally takes release paper as a carrier, polyurethane resin slurry is coated on the release paper by scraping, the release paper is placed in an oven for heating and drying to remove a solvent in resin to form a continuous and uniform polyurethane film, then a binder is coated on the film by scraping, the film is attached to base cloth, the release paper is peeled by a peeling device after drying and curing, and finished artificial leather and the release paper are respectively coiled. The polyurethane slurry coating agent, the release paper and the base cloth are three components of a dry process. The synthetic leather produced by the dry method has compact film layer, excellent product strength and firm bonding.
The wet-process polyurethane synthetic leather is coated to enable slurry to fully penetrate into gaps of the non-woven fabric, then the non-woven fabric is arranged in a coagulating bath, and DMF-H is utilized2The O' system is miscible, so that Dimethylformamide (DMF) is continuously immersed into the coagulating bath from the resin solution, and simultaneously water is immersed into the base cloth to gradually convert PU from a dissolved state into a gel state, and finally a solid film is formed. In the exchange process, a large number of micropores are generated due to the regulation effect of the auxiliary agent and the shrinkage of polyurethane, and a multilayer structure body with a continuous porous layer is obtained, so that the synthetic leather synthesized by the wet method has good moisture permeability and air permeability, soft, full and light hand feeling and rich natural leatherStyle and appearance.
CN 109096463A discloses a high cold-resistant dry-process polyurethane resin and a preparation method thereof, wherein the high cold-resistant dry-process polyurethane resin is prepared from the following raw materials: the organic silicon-based polyurethane elastomer comprises a polyol compound, a dihydric alcohol chain extender, diisocyanate, a catalyst, an antioxidant and a solvent, and the raw materials further comprise an organic silicon prepolymer. According to the polyurethane resin, the organic silicon prepolymer is added into the raw materials, so that the cold resistance of the polyurethane resin is improved, but the hand feeling needs to be further improved.
CN 109137551A discloses double-sided foaming high-wrinkle-resistance polyurethane leather, which comprises a first polyurethane surface layer, a bonding layer, a first polyurethane foaming layer, a bottom cloth layer, a second polyurethane foaming layer and a second polyurethane surface layer; the bottom cloth layer is formed by impregnating the base cloth with polyurethane impregnating slurry. The double-sided foaming crease-resistant polyester leather achieves the purpose of crease resistance through the arrangement of the double-sided foaming layer, but solvent residues are easily caused, the process is complex, and the reduction of the manufacturing cost is not facilitated.
Therefore, the polyurethane leather has higher strength, has scratch resistance and wear resistance, improves the hand feeling and the tearing strength, and has important significance for the development of the polyurethane leather in the fields of clothing, shoemaking, cases, furniture and automobiles.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art exists, the utility model aims to provide an imitative cashmere polyurethane leather, imitative cashmere polyurethane leather peel strength is high, tear strength is high, elasticity is good, the crease is thin, has higher economic value and good market prospect.
To achieve the purpose, the utility model adopts the following technical proposal:
the utility model provides an imitative cashmere polyurethane leather, imitative cashmere polyurethane leather is including the first wet process polyurethane resin layer, base cloth layer, second wet process polyurethane resin layer, tie coat, polyurethane resin surface course and the polyurethane resin protective layer that set gradually.
The base cloth layer is cashmere-like base cloth coated with wet-process polyurethane resin.
The utility model discloses a set up first wet process polyurethane resin layer of wet process, base cloth layer, second wet process polyurethane resin layer, tie coat, polyurethane resin surface course and polyurethane resin protective layer, the imitative cashmere polyurethane leather that makes the combination form has that peel strength is high, tear strength is high, elasticity is good and the fine advantage of crease.
Preferably, the first wet process polyurethane resin layer is a polycarbonate polyurethane resin layer having a thickness of 0.1 to 0.15mm, for example, 0.1mm, 0.11mm, 0.12mm, 0.13mm, 0.14mm or 0.15mm, but not limited to the recited values, and other values not recited within the range of values are equally applicable.
Exemplarily, the raw materials of the first wet process polyurethane resin layer of the present invention include, by weight: 80-120 parts of polycarbonate polyurethane resin, 100-120 parts of dimethylformamide and 1-5 parts of wet color paste.
The polycarbonate type polyurethane resin is 80 to 120 parts by weight, for example, 80 parts, 85 parts, 90 parts, 95 parts, 100 parts, 105 parts, 110 parts, 115 parts or 120 parts, but not limited to the enumerated values, and other values in the numerical range are also applicable; the weight portion of the dimethylformamide is 100-120 parts, such as 100 parts, 105 parts, 110 parts, 115 parts or 120 parts, but the dimethylformamide is not limited to the enumerated values, and other unrecited values in the numerical range are also applicable; the wet color paste is 1-5 parts by weight, for example, 1 part, 2 parts, 3 parts, 4 parts or 5 parts, but not limited to the enumerated values, and other unrecited values in the numerical range are also applicable.
The dimethyl formamide is a solvent and is used for adjusting proper viscosity after dissolving the polyurethane resin; the wet process color paste is used for adjusting the color, and the person skilled in the art can reasonably select the color according to the color effect requirement.
Preparing first wet-process polyurethane resin slurry according to the weight part ratio, and solidifying the first wet-process polyurethane resin slurry to obtain a first wet-process polyurethane resin layer. The viscosity of the first wet process polyurethane resin slurry is 50000-100000cps/25 ℃, for example, 50000cps/25 ℃, 60000cps/25 ℃, 70000cps/25 ℃, 80000cps/25 ℃, 90000cps/25 ℃ or 100000cps/25 ℃, but is not limited to the enumerated values, and other non-enumerated values within the range of values are also applicable. The resulting first wet-process polyurethane resin layer has a solids content of 34 to 36%, for example 34%, 34.5%, 35%, 35.5% or 36%, but is not limited to the values recited, and other values not recited within the range of values are equally applicable.
Preferably, the raw material of the first wet-process polyurethane resin layer further comprises a flame retardant, and the flame retardant comprises but is not limited to flame retardant powder TF-611.
Preferably, the weight part of the flame retardant in the raw material of the first wet-process polyurethane resin layer is 10 to 20 parts, for example, 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts, 16 parts, 17 parts, 18 parts, 19 parts or 20 parts, but not limited to the enumerated values, and other unrecited values in the numerical range are also applicable.
The utility model discloses an add the fire retardant in the raw materials on first wet process polyurethane resin layer, the imitative cashmere polyurethane leather that makes the preparation obtain has good flame retardant efficiency.
Preferably, the second wet process polyurethane resin layer is a polycarbonate polyurethane resin layer with a thickness of 0.01-0.02mm, such as 0.01mm, 0.012mm, 0.015mm, 0.018mm or 0.02mm, but not limited to the values recited, and other values not recited in the range of values are equally applicable.
Exemplarily, the raw materials of the second wet process polyurethane resin layer of the present invention include, by weight: 80-120 parts of polycarbonate polyurethane resin, 100-120 parts of dimethylformamide, 10-20 parts of flame retardant and 1-5 parts of wet color paste.
The polycarbonate type polyurethane resin is 80 to 120 parts by weight, for example, 80 parts, 85 parts, 90 parts, 95 parts, 100 parts, 105 parts, 110 parts, 115 parts or 120 parts, but not limited to the enumerated values, and other values in the numerical range are also applicable; the weight portion of the dimethylformamide is 100-120 parts, such as 100 parts, 105 parts, 110 parts, 115 parts or 120 parts, but the dimethylformamide is not limited to the enumerated values, and other unrecited values in the numerical range are also applicable; the weight portion of the flame retardant is 10-20 parts, such as 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts, 16 parts, 17 parts, 18 parts, 19 parts or 20 parts, but not limited to the enumerated values, and other unrecited values in the numerical range are also applicable; the wet color paste is 1-5 parts by weight, for example, 1 part, 2 parts, 3 parts, 4 parts or 5 parts, but not limited to the enumerated values, and other unrecited values in the numerical range are also applicable.
The dimethyl formamide is a solvent and is used for adjusting proper viscosity after dissolving the polyurethane resin; the flame retardant is used for enabling the prepared cashmere polyurethane leather to have a flame retardant effect; the wet-process color paste is used for adjusting color, and can be reasonably selected by a person skilled in the art according to the requirement of color effect.
Preferably, the flame retardant includes, but is not limited to, flame retardant powder TF-611.
And preparing second wet-process polyurethane resin slurry according to the weight part ratio, and solidifying the second wet-process polyurethane resin slurry to obtain a second wet-process polyurethane resin layer. The viscosity of the second wet process polyurethane resin slurry is 50000-100000cps/25 ℃, for example, 50000cps/25 ℃, 60000cps/25 ℃, 70000cps/25 ℃, 80000cps/25 ℃, 90000cps/25 ℃ or 100000cps/25 ℃, but is not limited to the enumerated values, and other non-enumerated values within the range of values are also applicable. The resulting second wet-process polyurethane resin layer has a solids content of 34-36%, which may be, for example, 34%, 34.5%, 35%, 35.5%, or 36%, but is not limited to the recited values, and other values within the range are equally applicable.
Preferably, the tie layer is a dry-laid polyurethane resin layer having a thickness of 0.02-0.03mm, such as 0.02, 0.022, 0.025, 0.027 or 0.03mm, but not limited to the values recited, and other values not recited within the numerical range are equally applicable.
Preferably, the adhesive layer is a two-component polyurethane resin layer.
Exemplarily, the two-component polyurethane resin layer of the present invention comprises the following raw materials in parts by weight: 80-120 parts of a two-component polyurethane resin main agent, 13-18 parts of a bridging agent for the two-component polyurethane resin, 3-6 parts of an accelerator for the two-component polyurethane resin, 10-20 parts of dimethylformamide and 10-20 parts of butanone.
The weight portion of the two-component polyurethane resin main agent is 80-120 parts, such as 80 parts, 85 parts, 90 parts, 95 parts, 100 parts, 105 parts, 110 parts, 115 parts or 120 parts, but not limited to the enumerated values, and other unrecited values in the numerical range are also applicable; the weight part of the bridging agent for the two-component polyurethane resin is 13-18 parts, for example, 13 parts, 14 parts, 15 parts, 16 parts, 17 parts or 18 parts, but the bridging agent is not limited to the enumerated values, and other unrecited values in the numerical range are also applicable; the accelerator for the two-component polyurethane resin has 3 to 6 parts by weight, for example, 3 parts, 4 parts, 5 parts or 6 parts, but is not limited to the enumerated values, and other unrecited values in the numerical range are also applicable; the amount of dimethylformamide is 10 to 20 parts by weight, for example 10 parts, 12 parts, 15 parts, 18 parts or 20 parts, but is not limited to the values listed, and other values not listed in the numerical ranges are also applicable; the parts by weight of butanone are, for example, 10 to 20 parts, for example 10 parts, 12 parts, 15 parts, 18 parts or 20 parts, but are not limited to the stated values, and other values not stated in the numerical ranges are likewise suitable.
The two-component polyurethane resin is a conventional solvent-based two-component polyurethane resin in the field, wherein the two-component polyurethane resin main agent comprises hydroxyl-terminated polyurethane resin; the bridging agent for the two-component polyurethane resin comprises a polyurethane prepolymer component blocked by isocyanate groups; the accelerant comprises a bismuth carboxylate catalyst and/or a zinc carboxylate catalyst which are commonly used in the polyurethane industry, and are commercially available products, and the technical personnel in the field can reasonably select the catalyst according to the process requirements, so that the utility model is not limited too much.
The dimethyl formamide and butanone are used as solvents for regulating proper viscosity after dissolving polyurethane resin; the bridging agent and the accelerator are used for curing the two-component polyurethane resin. The bridging agent comprises, but is not limited to, a bridging agent with the mark number of 201 and/or 301; the accelerators include, but are not limited to, ethylenediamine and/or zinc naphthenate.
Preparing two-component polyurethane resin slurry according to the weight part ratio, and curing the two-component polyurethane resin slurry to obtain a two-component polyurethane resin layer. The viscosity of the two-component polyurethane resin slurry is 10000-50000cps/25 ℃, for example 10000cps/25 ℃, 20000cps/25 ℃, 30000cps/25 ℃, 40000cps/25 ℃ or 50000cps/25 ℃, but is not limited to the recited values, and other values not recited in the range of values are also applicable. The resulting two-component polyurethane resin layer has a solids content of 58 to 62%, for example 58%, 59%, 60%, 61% or 62%, but is not limited to the values listed, and other values not listed in the numerical ranges are equally applicable.
Preferably, the polyurethane resin surface layer is a dry polyurethane resin layer with a thickness of 0.015-0.02mm, such as 0.015mm, 0.016mm, 0.017mm, 0.018mm, 0.019mm or 0.02mm, but not limited to the recited values, and other values not recited in the numerical range are equally applicable.
Preferably, the polyurethane resin surface layer is an aliphatic polycarbonate polyurethane resin layer.
Illustratively, the aliphatic polycarbonate type polyurethane resin layer comprises the following raw materials in parts by weight: 80-120 parts of aliphatic polycarbonate type polyurethane resin, 40-60 parts of dimethylformamide, 40-60 parts of methyl ester and 5-10 parts of dry color paste.
The aliphatic polycarbonate type polyurethane resin may be, for example, 80 to 120 parts, 85 parts, 90 parts, 95 parts, 100 parts, 105 parts, 110 parts, 115 parts or 120 parts, but is not limited to the enumerated values, and other values not enumerated within the numerical range are also applicable; the dimethylformamide is present in an amount of 40 to 60 parts by weight, for example 40, 45, 50, 55 or 60 parts, but not limited to the values listed, and other values not listed within the numerical range are equally suitable; the weight portion of the methyl ester is 40-60 parts, such as 40 parts, 45 parts, 50 parts, 55 parts or 60 parts, but is not limited to the enumerated values, and other unrecited values in the numerical range are also applicable; the dry color paste is present in an amount of 5 to 10 parts by weight, for example 5, 6, 7, 8, 9 or 10 parts by weight, but is not limited to the values listed, and other values not listed within the numerical ranges are equally applicable.
The aliphatic polycarbonate type polyurethane resin is polymerized by polycarbonate diol and aliphatic isocyanate, wherein the aliphatic isocyanate is isocyanate commonly used in the field, including but not limited to isophorone diisocyanate (IPDI), dicyclohexylmethane diisocyanate (H)12MDI), 1, 6-Hexamethylene Diisocyanate (HDI), or a combination of at least two thereof, which can be appropriately selected by those skilled in the art according to the process requirements.
The dimethyl formamide is a solvent and is used for adjusting proper viscosity after dissolving the polyurethane resin; the dry-process color paste is used for adjusting the color, and can be reasonably selected by a person skilled in the art according to the requirement of color effect.
The aliphatic polycarbonate polyurethane resin layer has a solids content of 29 to 31%, for example 29%, 30% or 31%, but not limited to the values listed, and other values not listed in the numerical range are also applicable; the viscosity of the aliphatic polycarbonate type polyurethane resin slurry is 80000-140000cps/25 ℃, for example, 80000cps/25 ℃, 90000cps/25 ℃, 100000cps/25 ℃, 110000cps/25 ℃, 120000cps/25 ℃, 130000cps/25 ℃ or 140000cps/25 ℃, but not limited to the recited values, and other non-recited values within the range of values are also applicable.
Preferably, the polyurethane resin protective layer is an aqueous polyurethane resin layer.
Illustratively, the raw materials of the aqueous polyurethane resin layer comprise, by weight: 80-120 parts of waterborne polyurethane resin, 0.2-1 part of wetting agent, 0.1-3 parts of thickening agent and 0.2-1 part of defoaming agent.
The weight portion of the aqueous polyurethane resin is 80-120 parts, such as 80 parts, 85 parts, 90 parts, 95 parts, 100 parts, 105 parts, 110 parts, 115 parts or 120 parts, but not limited to the enumerated values, and other unrecited values in the numerical range are also applicable; the wetting agent is present in an amount of 0.2 to 1 part by weight, for example 0.2 part, 0.3 part, 0.4 part, 0.5 part, 0.6 part, 0.7 part, 0.8 part, 0.9 part or 1 part, but is not limited to the values listed, and other values not listed within the numerical ranges are equally applicable; the weight part of the thickener is 0.1 to 3 parts, for example, 0.1 part, 0.5 part, 1 part, 1.5 part, 2 parts, 2.5 parts or 3 parts, but is not limited to the enumerated values, and other unrecited values within the numerical range are also applicable; the amount of the defoaming agent is 0.2 to 1 part by weight, and may be, for example, 0.2 part, 0.4 part, 0.6 part, 0.8 part or 1 part, but is not limited to the values listed, and other values not listed in the numerical range are also applicable.
The waterborne polyurethane resin layer has the wear-resistant and scratch-resistant performances, and the wear-resistant and scratch-resistant performances of the cashmere-like polyurethane leather are improved.
The aqueous polyurethane resin slurry is prepared according to the weight part ratio, and the aqueous polyurethane resin layer is obtained after the aqueous polyurethane numerical value slurry is solidified. The viscosity of the aqueous polyurethane slurry is 10 to 100cps/25 ℃, for example, 10cps/25 ℃, 20cps/25 ℃, 30cps/25 ℃, 40cps/25 ℃, 50cps/25 ℃, 60cps/25 ℃, 70cps/25 ℃, 80cps/25 ℃, 90cps/25 ℃ or 100cps/25 ℃, but not limited to the recited values, and other non-recited values in the range of values are equally applicable; the resulting aqueous polyurethane resin layer has a solids content of 29 to 31%, for example 29%, 30% or 31%, but is not limited to the values listed, and other values not listed in the numerical range are also applicable.
Preferably, the sizing amount of the aqueous polyurethane resin slurry is 10 to 15g/m when the aqueous polyurethane resin layer is formed2For example, it may be 10g/m2、11g/m2、12g/m2、13g/m2、14g/m2Or 15g/m2But are not limited to the recited values, and other values within the numerical range not recited are equally applicable.
Preferably, the wet polyurethane resin coated in the base fabric layer is a polycarbonate polyurethane resin.
Illustratively, the raw materials of the polycarbonate type polyurethane resin of the present invention are calculated by weight parts, including: 80-120 parts of polycarbonate polyurethane resin and 100-120 parts of dimethylformamide.
The polycarbonate type polyurethane resin is 80 to 120 parts by weight, for example, 80 parts, 85 parts, 90 parts, 95 parts, 100 parts, 105 parts, 110 parts, 115 parts or 120 parts, but not limited to the enumerated values, and other values in the numerical range are also applicable; the weight portion of the dimethylformamide is 100-120 parts, for example, 100 parts, 105 parts, 110 parts, 115 parts or 120 parts, but is not limited to the enumerated values, and other unrecited values in the numerical range are also applicable.
The dimethylformamide is a solvent, and is used for adjusting appropriate viscosity after dissolving the polyurethane resin.
Preparing polycarbonate polyurethane resin slurry according to the weight part ratio, and arranging the polycarbonate polyurethane resin slurry on the cashmere-like base fabric by an impregnation method to obtain the base fabric.
The raw materials of the polycarbonate polyurethane resin slurry comprise, by weight, 80-120 parts of polycarbonate polyurethane resin, 100 parts of dimethylformamide, 10-20 parts of a flame retardant and 1-5 parts of wet color paste.
The polycarbonate type polyurethane resin is 80 to 120 parts by weight, for example, 80 parts, 85 parts, 90 parts, 95 parts, 100 parts, 105 parts, 110 parts, 115 parts or 120 parts, but not limited to the enumerated values, and other values in the numerical range are also applicable; the weight portion of the dimethylformamide is 100-120 parts, such as 100 parts, 105 parts, 110 parts, 115 parts or 120 parts, but the dimethylformamide is not limited to the enumerated values, and other unrecited values in the numerical range are also applicable; the weight portion of the flame retardant is 10-20 parts, such as 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts, 16 parts, 17 parts, 18 parts, 19 parts or 20 parts, but not limited to the enumerated values, and other unrecited values in the numerical range are also applicable; the wet color paste is 1-5 parts by weight, for example, 1 part, 2 parts, 3 parts, 4 parts or 5 parts, but not limited to the enumerated values, and other unrecited values in the numerical range are also applicable.
The polycarbonate type polyurethane resin slurry is prepared according to the weight portion ratio, the viscosity is 50000-100000cps/25 ℃, for example, 50000cps/25 ℃, 60000cps/25 ℃, 70000cps/25 ℃, 80000cps/25 ℃, 90000cps/25 ℃ or 100000cps/25 ℃, but not limited to the enumerated values, and other unrecited values in the numerical range are also applicable.
Preferably, the mass ratio of the polycarbonate polyurethane resin to the cashmere-like base fabric in the base fabric layer is (0.7-0.9):1, and may be, for example, 0.7:1, 0.75:1, 0.8:1, 0.85:1 or 0.9:1, but is not limited to the values listed, and other values not listed in the numerical range are also applicable.
Preferably, the cashmere-like base fabric is a cashmere-like knitted fabric, and the thickness is 0.9-1mm, for example, 0.9mm, 0.92mm, 0.95mm, 0.98mm or 1mm, but not limited to the enumerated values, and other unrecited values in the numerical range are also applicable; the gram weight is 280-320g/m2For example, it may be 280g/m2、 290g/m2、300g/m2、310g/m2Or 320g/m2But are not limited to the recited values, and other values within the numerical range not recited are equally applicable.
Thickness is average thickness.
Compared with the prior art, the beneficial effects of the utility model are that:
(1) the cashmere-like polyurethane leather provided by the utility model has hand feeling close to that of real leather, the thickness of the second wet-process polyurethane resin layer is thinner, the bonding effect of the bonding layer is better, the cashmere-like polyurethane leather has higher peel strength, and the wear resistance of the obtained cashmere-like polyurethane leather is improved through the arrangement of the protective layer;
(2) the utility model discloses a set up wet process polyurethane resin layer in local layer both sides, make the crease of the imitative cashmere polyurethane leather of gained thin, reduced the weight of imitative cashmere polyurethane leather, and improved tear strength.
Drawings
Fig. 1 is a schematic structural diagram of cashmere-like polyurethane leather provided in embodiment 1;
fig. 2 is a schematic structural diagram of the cashmere-like polyurethane leather base fabric layer provided in embodiment 1.
Wherein: 1, a first wet-process polyurethane resin layer; 2, a base fabric layer; 201, polycarbonate urethane resin; 202, cashmere-like knitted fabric; 3, a second wet-process polyurethane resin layer; 4, a bonding layer; 5, a polyurethane resin surface layer; 6, a polyurethane resin protective layer.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
Example 1
The embodiment provides cashmere-like polyurethane leather, and a structural schematic diagram of the cashmere-like polyurethane leather is shown in fig. 1, and the cashmere-like polyurethane leather comprises a first wet-process polyurethane resin layer 1, a base fabric layer 2, a second wet-process polyurethane resin layer 3, a bonding layer 4, a polyurethane resin surface layer 5 and a polyurethane resin protective layer 6 which are sequentially arranged.
The first wet-process polyurethane resin layer 1 is a polycarbonate polyurethane resin layer with a thickness of 0.13 mm.
The structure schematic diagram of the base fabric layer 2 is shown in fig. 2, and is a cashmere-like knitted fabric 202 impregnated with a polycarbonate type polyurethane resin 201, the thickness of the cashmere-like knitted fabric 202 is 0.95mm, and the gram weight is 300g/m2The mass ratio of the polycarbonate polyurethane resin 201 to the cashmere-like knitted fabric 202 is 0.8: 1.
The second wet-process polyurethane resin layer 3 is a polycarbonate polyurethane resin layer having a thickness of 0.015 mm. The bonding layer 4 is a two-component polyurethane resin layer with the thickness of 0.025 mm. The polyurethane resin surface layer 5 is an aliphatic polycarbonate polyurethane resin layer with the thickness of 0.018 mm. The polyurethane resin protective layer 6 is an aqueous polyurethane resin layer formed such that the sizing amount of the aqueous polyurethane resin slurry is 12g/m2。
The preparation method of the cashmere-like polyurethane leather comprises the following steps:
(1) coating the polycarbonate type polyurethane resin slurry on cashmere-like knitted fabric 202 at a coating interval of 1.5-1.7mm, and then placing the fabric in a coagulating bath for coagulation; the concentration of dimethylformamide aqueous solution in the coagulation bath is 20-23%, the temperature is 15-20 deg.C, and DMF-H is used2Mixing and dissolving the O' system, continuously immersing dimethylformamide into a coagulating bath from the polycarbonate type polyurethane resin slurry, simultaneously immersing water into the cashmere-like knitted fabric 202 to convert the polycarbonate type polyurethane resin slurry from a dissolved state into a gel state, and finally forming a solid film with a porous structure; extruding and washing by a water washing tank with clear water at 40-60 ℃ and the pressure of an extrusion roller at 0.3-0.4MPa for multiple times, replacing residual dimethylformamide in the porous structure solid membrane, drying by a five-section type drying oven at 100 ℃, 120 ℃, 140 ℃ and 120 ℃ in sequence, cooling and unreeling to obtain a wet-process semi-finished product;
(2) unreeling release paper, coating aliphatic polycarbonate type polyurethane resin slurry on the release paper, drying and cooling, wherein an oven used for drying is in a three-stage type, and the temperature of the oven is 80 ℃, 100 ℃ and 120 ℃ in sequence to obtain a polyurethane resin surface layer 5;
(3) coating two-component polyurethane resin slurry on the polyurethane resin surface layer 5 in the step (2), pre-drying and semi-drying, wherein the temperature of an oven is 80-100 ℃, then attaching the polyurethane resin surface layer to a wet-process semi-finished product, the attaching pressure is 0.4-0.5MPa, drying and cooling are carried out, the oven for drying is in a four-section type, the temperature of the oven is 100 ℃, 120 ℃, 140 ℃ and 100 ℃ in sequence, after cooling, release paper is peeled off, and the lines of the release paper are transferred to the surface of the polyurethane resin surface layer 5, so as to obtain a semi-finished product subjected to dry-process attaching;
(4) performing surface treatment on the waterborne polyurethane resin layer on the surface of the semi-finished product subjected to dry veneering obtained in the step (3) by using a three-plate printing process, wherein anilox rollers for printing are 80 meshes, 120 meshes and 150 meshes in sequence, and the sizing amount of the waterborne polyurethane resin sizing agent is 12g/m2And then drying, namely two-section drying, wherein the drying temperature is 100 ℃ and 120 ℃, and cooling and rolling to obtain the cashmere-like polyurethane leather.
The peel strength and the tear strength of the prepared cashmere-like polyurethane leather are tested, the peel strength is determined according to the method specified in GB/T8949-2008, and the tear strength is tested according to the method specified in GB/T16578.1-2008. The instrument used for testing is an AI-7000-S servo control computer system tensile testing machine. The obtained peel strength is more than or equal to 20N/cm, and the obtained tearing strength is more than or equal to 35N/mm.
Example 2
The embodiment provides a cashmere-like polyurethane leather, which comprises a first wet-process polyurethane resin layer 1, a base fabric layer 2, a second wet-process polyurethane resin layer 3, a bonding layer 4, a polyurethane resin surface layer 5 and a polyurethane resin protective layer 6 which are sequentially arranged.
The first wet-process polyurethane resin layer 1 is a polycarbonate polyurethane resin layer having a thickness of 0.1 mm.
The base cloth layer 2 is a cashmere-like knitted fabric 202 impregnated with a polycarbonate type polyurethane resin 201, the thickness of the cashmere-like knitted fabric 202 is 0.9mm, and the gram weight is 280g/m2The mass ratio of the polycarbonate polyurethane resin 201 to the cashmere-like knitted fabric 202 is 0.7: 1.
The second wet-process polyurethane resin layer 3 is a polycarbonate polyurethane resin layer having a thickness of 0.01 mm. The bonding layer 4 is a two-component polyurethane resin layer with the thickness of 0.02 mm. The polyurethane resin surface layer 5 is an aliphatic polycarbonate polyurethane resin layer with the thickness of 0.015 mm. The polyurethane resin protective layer 6 is an aqueous polyurethane resin layer formed such that the sizing amount of the aqueous polyurethane resin slurry is 10g/m2。
The preparation method of the cashmere-like polyurethane leather comprises the following steps:
(1) coating the polycarbonate type polyurethane resin slurry on cashmere-like knitted fabric 202 at a coating interval of 1.5-1.7mm, and then placing the fabric in a coagulating bath for coagulation; the concentration of dimethylformamide aqueous solution in the coagulation bath is 20-23%, the temperature is 15-20 deg.C, and DMF-H is used2Mixing and dissolving the O' system, continuously immersing dimethyl formamide into a coagulating bath from the polycarbonate type polyurethane resin slurry, and simultaneously immersing water into the cashmere-like knitted fabric 202 to enable the polycarbonate type polyurethane resin slurry to beThe solution state is changed into a gel state, and finally a solid film with a porous structure is formed; extruding and washing by a water washing tank with clear water at 40-60 ℃ and the pressure of an extrusion roller at 0.3-0.4MPa for multiple times, replacing residual dimethylformamide in the porous structure solid membrane, drying by a five-section type drying oven at 100 ℃, 120 ℃, 140 ℃ and 120 ℃ in sequence, cooling and unreeling to obtain a wet-process semi-finished product;
(2) unreeling release paper, coating aliphatic polycarbonate type polyurethane resin slurry on the release paper, drying and cooling, wherein an oven used for drying is in a three-stage type, and the temperature of the oven is 80 ℃, 100 ℃ and 120 ℃ in sequence to obtain a polyurethane resin surface layer 5;
(3) coating two-component polyurethane resin slurry on the polyurethane resin surface layer 5 in the step (2), pre-drying and semi-drying, wherein the temperature of an oven is 80-100 ℃, then attaching the polyurethane resin surface layer to a wet-process semi-finished product, the attaching pressure is 0.4-0.5MPa, drying and cooling are carried out, the oven for drying is in a four-section type, the temperature of the oven is 100 ℃, 120 ℃, 140 ℃ and 100 ℃ in sequence, after cooling, release paper is peeled off, and the lines of the release paper are transferred to the surface of the polyurethane resin surface layer 5, so as to obtain a semi-finished product subjected to dry-process attaching;
(4) performing surface treatment on the waterborne polyurethane resin layer on the surface of the semi-finished product subjected to dry veneering obtained in the step (3) by using a three-plate printing process, wherein anilox rollers for printing are 80 meshes, 120 meshes and 150 meshes in sequence, and the sizing amount of the waterborne polyurethane resin sizing agent is 10g/m2And then drying, namely two-section drying, wherein the drying temperature is 100 ℃ and 120 ℃, and cooling and rolling to obtain the cashmere-like polyurethane leather.
The peel strength and the tear strength of the prepared cashmere-like polyurethane leather are tested, the peel strength is determined according to the method specified in GB/T8949-2008, and the tear strength is tested according to the method specified in GB/T16578.1-2008. The instrument used for testing is an AI-7000-S servo control computer system tensile testing machine. The obtained peel strength is more than or equal to 20N/cm, and the obtained tearing strength is more than or equal to 35N/mm.
Example 3
The embodiment provides a cashmere-like polyurethane leather, which comprises a first wet-process polyurethane resin layer 1, a base fabric layer 2, a second wet-process polyurethane resin layer 3, a bonding layer 4, a polyurethane resin surface layer 5 and a polyurethane resin protective layer 6 which are sequentially arranged.
The first wet-process polyurethane resin layer 1 is a polycarbonate polyurethane resin layer with a thickness of 0.15 mm.
The base cloth layer 2 is a cashmere-like knitted fabric 202 impregnated with a polycarbonate type polyurethane resin 201, the thickness of the cashmere-like knitted fabric 202 is 1mm, and the gram weight is 320g/m2The mass ratio of the polycarbonate polyurethane resin 201 to the cashmere-like knitted fabric 202 is 0.9: 1.
The second wet-process polyurethane resin layer 3 is a polycarbonate polyurethane resin layer with a thickness of 0.02 mm. The bonding layer 4 is a two-component polyurethane resin layer with the thickness of 0.03 mm. The polyurethane resin surface layer 5 is an aliphatic polycarbonate polyurethane resin layer with the thickness of 0.02 mm. The polyurethane resin protective layer 6 is an aqueous polyurethane resin layer, and the aqueous polyurethane resin layer is formed so that the sizing amount of the aqueous polyurethane resin slurry is 15g/m2。
The preparation method of the cashmere-like polyurethane leather comprises the following steps:
(1) coating the polycarbonate type polyurethane resin slurry on cashmere-like knitted fabric 202 at a coating interval of 1.5-1.7mm, and then placing the fabric in a coagulating bath for coagulation; the concentration of dimethylformamide aqueous solution in the coagulation bath is 20-23%, the temperature is 15-20 deg.C, and DMF-H is used2Mixing and dissolving the O' system, continuously immersing dimethylformamide into a coagulating bath from the polycarbonate type polyurethane resin slurry, simultaneously immersing water into the cashmere-like knitted fabric 202 to convert the polycarbonate type polyurethane resin slurry from a dissolved state into a gel state, and finally forming a solid film with a porous structure; extruding and washing by a water washing tank with clear water at 40-60 ℃ and the pressure of an extrusion roller at 0.3-0.4MPa for multiple times, replacing residual dimethylformamide in the porous structure solid membrane, drying by a five-section type drying oven at 100 ℃, 120 ℃, 140 ℃ and 120 ℃ in sequence, cooling and unreeling to obtain a wet-process semi-finished product;
(2) unreeling release paper, coating aliphatic polycarbonate type polyurethane resin slurry on the release paper, drying and cooling, wherein an oven used for drying is in a three-stage type, and the temperature of the oven is 80 ℃, 100 ℃ and 120 ℃ in sequence to obtain a polyurethane resin surface layer 5;
(3) coating two-component polyurethane resin slurry on the polyurethane resin surface layer 5 in the step (2), pre-drying and semi-drying, wherein the temperature of an oven is 80-100 ℃, then attaching the polyurethane resin surface layer to a wet-process semi-finished product, the attaching pressure is 0.4-0.5MPa, drying and cooling are carried out, the oven for drying is in a four-section type, the temperature of the oven is 100 ℃, 120 ℃, 140 ℃ and 100 ℃ in sequence, after cooling, release paper is peeled off, and the lines of the release paper are transferred to the surface of the polyurethane resin surface layer 5, so as to obtain a semi-finished product subjected to dry-process attaching;
(4) performing surface treatment on the waterborne polyurethane resin layer on the surface of the semi-finished product subjected to dry veneering obtained in the step (3) by using a three-plate printing process, wherein anilox rollers for printing are 80 meshes, 120 meshes and 150 meshes in sequence, and the sizing amount of the waterborne polyurethane resin sizing agent is 15g/m2And then drying, namely two-section drying, wherein the drying temperature is 100 ℃ and 120 ℃, and cooling and rolling to obtain the cashmere-like polyurethane leather.
The peel strength and the tear strength of the prepared cashmere-like polyurethane leather are tested, the peel strength is determined according to the method specified in GB/T8949-2008, and the tear strength is tested according to the method specified in GB/T16578.1-2008. The instrument used for testing is an AI-7000-S servo control computer system tensile testing machine. The obtained peel strength is more than or equal to 20N/cm, and the obtained tearing strength is more than or equal to 35N/mm.
To sum up, the cashmere-like polyurethane leather provided by the utility model has a hand feeling close to that of real leather, the thickness of the second wet-process polyurethane resin layer 3 is thinner, the bonding effect of the bonding layer 4 is better, the cashmere-like polyurethane leather has higher peel strength, and the wear resistance of the cashmere-like polyurethane leather is improved by the arrangement of the protective layer; the utility model discloses a set up wet process polyurethane resin layer in local layer both sides, make the crease of the imitative cashmere polyurethane leather of gained thin, reduced the weight of imitative cashmere polyurethane leather, and improved tear strength.
The applicant states that the above description is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and those skilled in the art should understand that any changes or substitutions easily conceivable by those skilled in the art within the technical scope of the present invention are within the protection scope and the disclosure scope of the present invention.
Claims (10)
1. The cashmere-like polyurethane leather is characterized by comprising a first wet-process polyurethane resin layer, a base cloth layer, a second wet-process polyurethane resin layer, a bonding layer, a polyurethane resin surface layer and a polyurethane resin protective layer which are sequentially arranged;
the base cloth layer is cashmere-like base cloth coated with wet-process polyurethane resin.
2. The cashmere-like polyurethane leather of claim 1, wherein the first wet-process polyurethane resin layer is a polycarbonate polyurethane resin layer, and the thickness of the first wet-process polyurethane resin layer is 0.1-0.15 mm.
3. The cashmere-like polyurethane leather of claim 1, wherein the second wet-process polyurethane resin layer is a polycarbonate polyurethane resin layer, and the thickness of the second wet-process polyurethane resin layer is 0.01-0.02 mm.
4. The cashmere-like polyurethane leather of claim 1, wherein the adhesive layer is a dry polyurethane resin layer, and the thickness of the adhesive layer is 0.02-0.03 mm.
5. The cashmere-like polyurethane leather of claim 4, wherein the adhesive layer is a two-component polyurethane resin layer.
6. The cashmere-like polyurethane leather of claim 1, wherein the polyurethane resin surface layer is a dry polyurethane resin layer, and the thickness of the polyurethane resin surface layer is 0.015-0.02 mm.
7. The cashmere-like polyurethane leather of claim 6, wherein the polyurethane resin surface layer is an aliphatic polycarbonate polyurethane resin layer.
8. The cashmere-like polyurethane leather of claim 1, wherein the polyurethane resin protective layer is a water-based polyurethane resin layer.
9. The cashmere-like polyurethane leather of claim 1, wherein the wet polyurethane resin coated in the base fabric layer is a polycarbonate polyurethane resin.
10. The cashmere-like polyurethane leather of claim 9, wherein the cashmere-like base fabric has a thickness of 0.9-1.0mm and a grammage of 280-320g/m2The cashmere-like knitted fabric.
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| CN115323804A (en) * | 2022-08-17 | 2022-11-11 | 游晟纺织科技(深圳)有限公司 | Breathable ultraviolet-proof PU composite fabric and manufacturing process thereof |
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| CN115323804A (en) * | 2022-08-17 | 2022-11-11 | 游晟纺织科技(深圳)有限公司 | Breathable ultraviolet-proof PU composite fabric and manufacturing process thereof |
| CN115323804B (en) * | 2022-08-17 | 2023-09-29 | 游晟纺织科技(深圳)有限公司 | Breathable ultraviolet-proof PU composite fabric and manufacturing process thereof |
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