CN107916578B - Method for manufacturing cashmere-feeling double-sided polyurethane synthetic leather - Google Patents
Method for manufacturing cashmere-feeling double-sided polyurethane synthetic leather Download PDFInfo
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- CN107916578B CN107916578B CN201711244696.2A CN201711244696A CN107916578B CN 107916578 B CN107916578 B CN 107916578B CN 201711244696 A CN201711244696 A CN 201711244696A CN 107916578 B CN107916578 B CN 107916578B
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- 229920002635 polyurethane Polymers 0.000 title claims abstract description 46
- 239000004814 polyurethane Substances 0.000 title claims abstract description 46
- 239000002649 leather substitute Substances 0.000 title claims abstract description 43
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000000576 coating method Methods 0.000 claims abstract description 87
- 239000011248 coating agent Substances 0.000 claims abstract description 85
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 54
- 210000000085 cashmere Anatomy 0.000 claims description 50
- 238000005096 rolling process Methods 0.000 claims description 40
- 150000004702 methyl esters Chemical class 0.000 claims description 38
- 238000001035 drying Methods 0.000 claims description 29
- 238000010409 ironing Methods 0.000 claims description 27
- 238000003756 stirring Methods 0.000 claims description 23
- 239000011527 polyurethane coating Substances 0.000 claims description 19
- 238000001816 cooling Methods 0.000 claims description 16
- 239000004744 fabric Substances 0.000 claims description 15
- 229920005749 polyurethane resin Polymers 0.000 claims description 15
- 238000007639 printing Methods 0.000 claims description 14
- 239000000843 powder Substances 0.000 claims description 13
- 238000005406 washing Methods 0.000 claims description 12
- 238000005187 foaming Methods 0.000 claims description 11
- 238000002360 preparation method Methods 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 8
- 238000004140 cleaning Methods 0.000 claims description 6
- 238000007493 shaping process Methods 0.000 claims description 6
- 238000007711 solidification Methods 0.000 claims description 6
- 230000008023 solidification Effects 0.000 claims description 6
- 238000007761 roller coating Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 13
- 239000000463 material Substances 0.000 abstract description 5
- 230000000052 comparative effect Effects 0.000 description 8
- 239000010985 leather Substances 0.000 description 8
- 239000010410 layer Substances 0.000 description 5
- 239000007788 liquid Substances 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 238000004043 dyeing Methods 0.000 description 2
- 239000004005 microsphere Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- KXDHJXZQYSOELW-UHFFFAOYSA-N Carbamic acid Chemical group NC(O)=O KXDHJXZQYSOELW-UHFFFAOYSA-N 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011258 core-shell material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 239000011859 microparticle Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/12—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
- D06N3/14—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes
- D06N3/145—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes two or more layers of polyurethanes
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0043—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by their foraminous structure; Characteristics of the foamed layer or of cellular layers
- D06N3/005—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by their foraminous structure; Characteristics of the foamed layer or of cellular layers obtained by blowing or swelling agent
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0056—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the compounding ingredients of the macro-molecular coating
- D06N3/0061—Organic fillers or organic fibrous fillers, e.g. ground leather waste, wood bark, cork powder, vegetable flour; Other organic compounding ingredients; Post-treatment with organic compounds
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/007—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by mechanical or physical treatments
- D06N3/0077—Embossing; Pressing of the surface; Tumbling and crumbling; Cracking; Cooling; Heating, e.g. mirror finish
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0086—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique
- D06N3/0088—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique by directly applying the resin
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N2211/00—Specially adapted uses
- D06N2211/12—Decorative or sun protection articles
- D06N2211/28—Artificial leather
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
- Treatment And Processing Of Natural Fur Or Leather (AREA)
- Synthetic Leather, Interior Materials Or Flexible Sheet Materials (AREA)
Abstract
The invention discloses a method for manufacturing cashmere-feeling double-sided polyurethane synthetic leather, which comprises a step of back coating with Bass, a step of preparing cashmere-feeling treating agent and a step of roll coating. The method can reduce the manufacturing process of the case or shoe production, save materials, reduce the production cost, and increase the style and effect of the synthetic leather by using the cashmere-feeling double-sided polyurethane synthetic leather, so that the color and effect of the synthetic leather product are more diversified.
Description
Technical Field
The invention relates to a method for manufacturing synthetic leather, in particular to a method for manufacturing cashmere-feel double-sided polyurethane synthetic leather.
Background
The single-sided synthetic leather products produced in the existing market have the advantages that the leather products formed by treatment are arranged on the front side, the synthetic leather substrate base cloth is arranged on the back side, so that in the process of manufacturing finished products such as bags and shoes, a layer of cloth is required to be attached to the back side or two pieces of single-sided synthetic leather are required to be bonded together, the two sides of double-sided leather are the treated leather products, when the bags or shoes are manufactured, the leather products are not required to be processed and attached, a manufacturing process is reduced, and raw materials are saved. However, the double-sided leather in the existing market has single color and product effect due to the limitation of double-sided treatment, and is difficult to meet the requirements of consumers.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide the method for manufacturing the cashmere-feel double-sided polyurethane synthetic leather, the method can reduce the manufacturing process of case or shoe production, save materials and reduce the production cost, and the style and effect of the synthetic leather are increased by the manufactured cashmere-feel double-sided polyurethane synthetic leather, so that the color and effect of the synthetic leather product are more diversified.
The purpose of the invention is realized by adopting the following technical scheme:
a method for manufacturing cashmere-feeling double-sided polyurethane synthetic leather comprises the following steps,
back coating bass: cleaning, ironing and drying the double-sided cashmere base fabric for the first time, coating polyurethane coating on the double-sided cashmere base fabric, solidifying and washing to obtain bass, rinsing and squeezing the bass, coating a back coating treatment agent on the back of the bass, washing, ironing for the second time, drying for the second time, shaping, cooling and rolling to obtain back coated bass;
the preparation method of the cashmere feel treating agent comprises the following steps: uniformly stirring polyurethane resin, methyl ester and expansion powder to obtain a cashmere feel treating agent;
and (3) rolling coating: and rolling and coating the cashmere feel treating agent on the back-coated bass, drying, cooling, rolling, foaming, and then overlapping the cashmere feel treating agent with the roll-coated wax feel treating agent to obtain the cashmere feel double-sided polyurethane synthetic leather.
Further, in the step of back coating bass, the primary ironing temperature is 70-80 ℃.
Further, in the back coating bass process, the coating thickness of the polyurethane coating was 24 μm.
Further, in the step of back coating bass, methyl ester is added during solidification, and the mass ratio of the methyl ester to the polyurethane coating is 100: (14-18).
Further, in the step of back coating bass, the back coating treating agent is polyurethane and methyl ester according to the mass ratio of 1: 3 stirring and mixing.
Further, the stirring speed of the polyurethane and the methyl ester is 1000 revolutions per minute, and the stirring time is 5-15 minutes.
Further, in the step of back coating bass, the secondary ironing temperature is 180-190 ℃.
Further, the preparation steps of the cashmere feeling treating agent are as follows: firstly, stirring the polyurethane resin and the methyl ester at the speed of 800-; wherein the mass ratio of the polyurethane resin to the methyl ester to the expansion powder is 50: 50: (3-8).
Further, in the roll coating step, the roll coating printing speed of the cashmere feeling treating agent is controlled to be 20-30 m/min.
Further, in the roll coating step, the drying temperature is 100-.
The invention has the beneficial effects that:
1. according to the manufacturing method of the cashmere-feeling double-sided polyurethane synthetic leather, the manufacturing process of case or shoe production can be reduced, materials are saved, the production cost is reduced, the style and the effect of the synthetic leather are increased by the manufactured cashmere-feeling double-sided polyurethane synthetic leather, and the color and the effect of the synthetic leather are more diversified;
2. the invention replaces impregnation and dyeing processes with a coating process, the dyeing process is easy to generate a large amount of industrial sewage and waste water to cause environmental pollution, but the coating process is completely free from the generation of waste water and waste materials and is more environment-friendly.
Detailed Description
The present invention is further described below with reference to specific embodiments, and it should be noted that, without conflict, any combination between the embodiments or technical features described below may form a new embodiment.
A method for manufacturing cashmere-feeling double-sided polyurethane synthetic leather comprises the following steps,
back coating bass: cleaning, ironing and drying the double-sided cashmere base fabric for the first time, coating polyurethane coating on the double-sided cashmere base fabric, solidifying and washing to obtain bass, rinsing and squeezing the bass, coating a back coating treatment agent on the back of the bass, washing, ironing for the second time, drying for the second time, shaping, cooling and rolling to obtain back coated bass;
the preparation method of the cashmere feel treating agent comprises the following steps: uniformly stirring polyurethane resin, methyl ester and expansion powder to obtain a cashmere feel treating agent;
and (3) rolling coating: and rolling and coating the cashmere feeling treating agent on the back-coated base, drying, cooling, rolling and foaming, then overlapping the cashmere feeling treating agent with the rolling and coating wax feeling treating agent, controlling the rolling and coating printing speed at 28 m/min, then coating a dry-process adhesive layer on the other side of the back-coated base, then performing printing treatment, and finally cooling and rolling to obtain the cashmere-feeling double-sided polyurethane synthetic leather.
The dry bonding layer is prepared by adding 5-8 parts of toner into 100 parts of polyurethane resin and 100 parts of methyl ester by mass, stirring at the speed of 800-1000 rpm for 5-10 minutes to prepare dry slurry, coating the dry slurry on release paper at the speed of 15-20 m/min, and drying in an oven to be semi-dry.
In a further embodiment, the primary ironing temperature in the step of back-coating bass is 70-80 ℃.
As a further embodiment, the coating thickness of the polyurethane coating in the step of back-coating the bass is 24 μm.
As a further embodiment, in the step of back coating bass, methyl ester is added during solidification, and the mass ratio of the methyl ester to the polyurethane coating is 100: (14-18).
As a further embodiment, in the step of back-coating bass, the back-coating treatment agent is polyurethane and methyl ester in a mass ratio of 1: 3 stirring and mixing.
In a further embodiment, the polyurethane and the methyl ester are mixed at a stirring speed of 1000 rpm for a stirring time of 5 to 15 minutes.
As a further embodiment, in the step of back coating Beth, the secondary ironing temperature is 180-190 ℃.
As a further implementation mode, the preparation steps of the cashmere feeling treating agent are as follows: firstly, stirring the polyurethane resin and the methyl ester at the speed of 800-; wherein the mass ratio of the polyurethane resin to the methyl ester to the expansion powder is 50: 50: (3-8).
In a further embodiment, in the roll coating step, the roll coating printing speed of the cashmere feeling treating agent is controlled to be 20-30 m/min.
As a further implementation mode, in the rolling coating step, the drying temperature is 100-130 ℃, and the foaming temperature is 170-180 ℃.
The polyurethane coating is dry-process resin with model number JF-S-8045B produced by Zhejiang Huafeng synthetic resin company Limited; the technical parameters are as follows, and the appearance is as follows: milky viscous liquid; solid content: 30.0 plus or minus 1.0 percent; viscosity: 10-16 ten thousand CPS/25 ℃; 100% modulus: 4.5 +/-0.5% MPa; the polyurethane is aliphatic polyurethane, contains extremely strong carbamate groups, is insoluble in nonpolar groups, and has good oil resistance, toughness, wear resistance, aging resistance and adhesiveness.
Methyl ester is colorless transparent liquid, is easy to volatilize and has strong solubility. Methyl ester is produced by Guangdong Yinyang chemical industry Co.
The expansion powder is a core-shell structure, the shell is a thermoplastic high molecular polymer, the inner core is spherical microparticles consisting of alkane gas, the foaming effect is achieved by means of expansion of microspheres, the appearance is slightly white fine powder, the diameters are different from 10-45 micrometers, the volume can be rapidly expanded to dozens of times of the volume after heating, the excellent foaming effect is achieved, and the temperature range of microsphere foaming is 100-260 ℃.
The wax feeling treating agent is a wax feeling treating agent which is produced by Zhejiang dark blue new material science and technology company Limited and has the model number of BLLK 3046, the technical parameters are as follows, and the appearance is as follows: a light yellow liquid; solid content: 14 to 16 percent; viscosity: 300 ℃ and 1000CPS/25 ℃.
The following are specific examples of the present invention, and raw materials, equipments and the like used in the following examples can be obtained by purchasing them unless otherwise specified.
Example 1:
a method for manufacturing cashmere-feeling double-sided polyurethane synthetic leather comprises the following steps,
back coating bass: cleaning, ironing and drying the double-sided cashmere base fabric for one time, then coating polyurethane coating on the double-sided cashmere base fabric at the ironing temperature of 70 ℃, wherein the coating thickness of the polyurethane coating is 24 microns, solidifying and washing to obtain Bass, adding methyl ester during solidification, and the mass ratio of the methyl ester to the polyurethane coating is 100: and 15, rinsing and wringing the bass, and coating a back coating treatment agent on the back of the bass, wherein the back coating treatment agent is prepared by mixing polyurethane and methyl ester according to a mass ratio of 1: 3, mixing the materials at the rotation speed of 1000 revolutions per minute for 5 minutes, washing, ironing for the second time, drying for the second time, shaping, ironing for the second time and drying for the second time for 12 times, wherein the ironing temperature for the second time is 180 ℃, and cooling and rolling to obtain back coating bass;
the preparation method of the cashmere feel treating agent comprises the following steps: firstly, stirring polyurethane resin and methyl ester at the speed of 800 revolutions per minute for 10 minutes, then adding expansion powder, continuously stirring at the speed of 800 revolutions per minute for 5 minutes, and controlling the viscosity to be 1000-1500 mPas to obtain the cashmere feel treating agent; wherein the mass ratio of the polyurethane resin to the methyl ester to the expansion powder is 50: 50: 3; obtaining a cashmere feel treating agent;
and (3) rolling coating: rolling and coating the cashmere feeling treating agent on one surface of the back-coated base at a rolling printing speed of 25 m/min, drying at 120 ℃, cooling and rolling, foaming at 180 ℃, overlapping the cashmere feeling treating agent with the rolling wax feeling treating agent at a rolling printing speed of 25 m/min, coating a dry bonding layer on the other surface of the back-coated base, printing to make the front surface of the leather have different styles and effects, and cooling and rolling to obtain the cashmere double-sided polyurethane synthetic leather.
Example 2:
a method for manufacturing cashmere-feeling double-sided polyurethane synthetic leather comprises the following steps,
back coating bass: cleaning, ironing and drying the double-sided cashmere base fabric for one time, wherein the ironing temperature for one time is 75 ℃, coating a polyurethane coating on the double-sided cashmere base fabric, the coating thickness of the polyurethane coating is 24 microns, solidifying and washing to obtain Bass, adding methyl ester during solidification, and the mass ratio of the methyl ester to the polyurethane coating is 100: and 16, rinsing and wringing the bass, and coating a back coating treatment agent on the back of the bass, wherein the back coating treatment agent is prepared by mixing polyurethane and methyl ester according to a mass ratio of 1: 3 stirring and mixing at the rotation speed of 1000 revolutions per minute for 7 minutes, washing, ironing for the second time, drying for the second time, shaping, ironing for the second time, drying for the second time for 12 times, wherein the ironing temperature for the second time is 190 ℃, and cooling and rolling to obtain back coating bass;
the preparation method of the cashmere feel treating agent comprises the following steps: firstly, stirring the polyurethane resin and the methyl ester at the speed of 1000 revolutions per minute for 5 minutes, then adding the expansion powder, continuously stirring at the speed of 1000 revolutions per minute for 3 minutes, and controlling the viscosity to be 1000-1500 mPas to obtain the cashmere feel treating agent; wherein the mass ratio of the polyurethane resin to the methyl ester to the expansion powder is 10: 10: 1; obtaining a cashmere feel treating agent;
and (3) rolling coating: rolling and coating the cashmere feeling treating agent on one surface of the back-coated base at a rolling printing speed of 30 m/min, drying at the drying temperature of 100 ℃, cooling and rolling, foaming at the temperature of 170 ℃, then overlapping the cashmere feeling treating agent with the rolling wax feeling treating agent at a rolling printing speed of 28 m/min, coating a dry bonding layer on the other surface of the back-coated base, printing to make the front surface of the leather have different styles and effects, and finally cooling and rolling to obtain the cashmere double-sided polyurethane synthetic leather.
Example 3:
a method for manufacturing cashmere-feeling double-sided polyurethane synthetic leather comprises the following steps,
back coating bass: cleaning, ironing and drying the double-sided cashmere base fabric for one time, wherein the ironing temperature for one time is 80 ℃, coating a polyurethane coating on the double-sided cashmere base fabric, the coating thickness of the polyurethane coating is 24 microns, solidifying and washing to obtain Bass, adding methyl ester during solidification, and the mass ratio of the methyl ester to the polyurethane coating is 100: 18, rinsing and wringing the bass, and coating a back coating treatment agent on the back of the bass, wherein the back coating treatment agent is polyurethane and methyl ester in a mass ratio of 1: 3, stirring and mixing at the rotating speed of 1000 revolutions per minute for 9 minutes, washing, ironing for the second time, drying for the second time, shaping, ironing for the second time, drying for the second time for 12 times, wherein the ironing temperature for the second time is 185 ℃, and cooling and rolling to obtain back coating bass;
the preparation method of the cashmere feel treating agent comprises the following steps: firstly, stirring the polyurethane resin and the methyl ester at the speed of 9000 r/min for 7 min, then adding the expansion powder, continuously stirring at the speed of 900 r/min for 4 min, and controlling the viscosity to be 1000-1500 mPas to obtain the cashmere feel treating agent; wherein the mass ratio of the polyurethane resin to the methyl ester to the expansion powder is 50: 50: 8; obtaining a cashmere feel treating agent;
and (3) rolling coating: rolling and coating the cashmere feeling treating agent on one surface of the back-coated base at a rolling printing speed of 25 m/min, drying at the drying temperature of 100 ℃, cooling and rolling, foaming at 180 ℃, overlapping the cashmere feeling treating agent with the rolling wax feeling treating agent at a rolling printing speed of 30 m/min, coating a dry bonding layer on the other surface of the back-coated base, printing to make the front surface of the leather have different styles and effects, and cooling and rolling to obtain the cashmere double-sided polyurethane synthetic leather.
Comparative example 1:
comparative example 1 is different from example 1 in that the step of coating polyurethane paint on the double-sided cashmere base cloth is removed in the step of back-coating bass.
Comparative example 2:
comparative example 2 is different from example 1 in that the viscosity was controlled at 2000 mpa · s in the cashmere feel treating agent preparation step.
Comparative example 3:
comparative example 3 is different from example 1 in that the viscosity was controlled at 500 mpa · s in the cashmere feel treating agent preparation step.
Effect evaluation and Performance detection
The performance of the cashmere-like double-sided polyurethane synthetic leather prepared by the method for manufacturing the cashmere-like double-sided polyurethane synthetic leather of examples 1 to 3 and comparative examples 1 to 3 was tested, and the results were as follows:
TABLE 1 test results
As can be seen from the above table, the cashmere-like double-sided polyurethane synthetic leather prepared by the method for preparing the cashmere-like double-sided polyurethane synthetic leather has good stretching degree, tear resistance, stain resistance and wear resistance, and the performance of comparative examples 1 to 3 is inferior to that of examples 1 to 3, which shows that the toughness, wear resistance and aging resistance of the cashmere-like double-sided polyurethane synthetic leather can be effectively enhanced by adding the polyurethane coating and controlling the coating degree to be within 1000-1500 mpa · s.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.
Claims (8)
1. A method for manufacturing cashmere-feeling double-sided polyurethane synthetic leather is characterized by comprising the following steps of,
back coating bass: cleaning, ironing and drying the double-sided cashmere base fabric for the first time, coating polyurethane coating on the double-sided cashmere base fabric, solidifying and washing to obtain bass, rinsing and squeezing the bass, coating a back coating treatment agent on the back of the bass, washing, ironing for the second time, drying for the second time, shaping, cooling and rolling to obtain back coated bass;
the back coating treating agent is prepared from polyurethane and methyl ester according to a mass ratio of 1: 3 stirring and mixing;
the preparation steps of the cashmere feel treating agent are as follows: firstly, stirring the polyurethane resin and the methyl ester at the speed of 800-; wherein the mass ratio of the polyurethane resin to the methyl ester to the expansion powder is 50: 50: (3-8);
and (3) rolling coating: and rolling and coating the cashmere feel treating agent on the back-coated bass, drying, cooling, rolling, foaming, and then overlapping the cashmere feel treating agent with the roll-coated wax feel treating agent to obtain the cashmere feel double-sided polyurethane synthetic leather.
2. The method for manufacturing cashmere-like double-sided polyurethane synthetic leather according to claim 1, wherein in the step of back coating bass, the primary ironing temperature is 70-80 ℃.
3. The method for manufacturing cashmere-like double-sided polyurethane synthetic leather according to claim 1, wherein in the step of back-coating with the base, the thickness of the coating of polyurethane is 24 μm.
4. The method for manufacturing the cashmere-like double-sided polyurethane synthetic leather according to claim 1, wherein in the step of back coating with the base, methyl ester is added during solidification, and the mass ratio of the methyl ester to the polyurethane coating is 100: (14-18).
5. The method for manufacturing the cashmere-like double-sided polyurethane synthetic leather according to claim 1, wherein the stirring speed is 1000 rpm and the stirring time is 5-15 minutes when the polyurethane and the methyl ester are mixed.
6. The method for manufacturing cashmere-like double-sided polyurethane synthetic leather according to claim 1, wherein in the step of back coating bass, the secondary ironing temperature is 180-190 ℃.
7. The method for manufacturing cashmere-like double-sided polyurethane synthetic leather according to claim 1, wherein in the roll coating step, the roll coating printing speed of the cashmere-like treating agent is controlled to be 20-30 m/min.
8. The method for manufacturing the cashmere-like double-sided polyurethane synthetic leather of claim 1, wherein in the step of roller coating, the drying temperature is 100-130 ℃, and the foaming temperature is 170-180 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711244696.2A CN107916578B (en) | 2017-11-30 | 2017-11-30 | Method for manufacturing cashmere-feeling double-sided polyurethane synthetic leather |
Applications Claiming Priority (1)
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Denomination of invention: A preparation method of cashmere sense double-sided polyurethane synthetic leather Effective date of registration: 20220321 Granted publication date: 20200505 Pledgee: China Construction Bank Co.,Ltd. Qingyuan Branch Pledgor: QINGYUAN QILI SYNTHETIC LEATHER Co.,Ltd. Registration number: Y2022980002890 |
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