CN111979790A - Light and thin flexible polyurethane leather and preparation method thereof - Google Patents
Light and thin flexible polyurethane leather and preparation method thereof Download PDFInfo
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- CN111979790A CN111979790A CN202010784219.0A CN202010784219A CN111979790A CN 111979790 A CN111979790 A CN 111979790A CN 202010784219 A CN202010784219 A CN 202010784219A CN 111979790 A CN111979790 A CN 111979790A
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- 239000010985 leather Substances 0.000 title claims abstract description 70
- 229920002635 polyurethane Polymers 0.000 title claims abstract description 70
- 238000002360 preparation method Methods 0.000 title claims abstract description 20
- 239000002344 surface layer Substances 0.000 claims abstract description 88
- 239000003292 glue Substances 0.000 claims abstract description 48
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 45
- 239000010410 layer Substances 0.000 claims abstract description 36
- 239000012790 adhesive layer Substances 0.000 claims abstract description 33
- 239000004744 fabric Substances 0.000 claims abstract description 31
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 22
- 239000002562 thickening agent Substances 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 18
- 239000007788 liquid Substances 0.000 claims description 60
- 238000001035 drying Methods 0.000 claims description 28
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Images
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
- D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
- D06N3/0015—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using fibres of specified chemical or physical nature, e.g. natural silk
- D06N3/0036—Polyester fibres
-
- 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
- D06N3/0095—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 inversion technique; by transfer processes
- D06N3/0097—Release surface, e.g. separation sheets; Silicone papers
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N2209/00—Properties of the materials
- D06N2209/10—Properties of the materials having mechanical properties
- D06N2209/103—Resistant to mechanical forces, e.g. shock, impact, puncture, flexion, shear, compression, tear
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N2209/00—Properties of the materials
- D06N2209/16—Properties of the materials having other properties
- D06N2209/1678—Resistive to light or to UV
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N2209/00—Properties of the materials
- D06N2209/16—Properties of the materials having other properties
- D06N2209/1685—Wear resistance
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- 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)
- Synthetic Leather, Interior Materials Or Flexible Sheet Materials (AREA)
Abstract
The invention provides light, thin and flexible polyurethane leather which comprises base cloth, an adhesive layer and a surface layer, wherein the adhesive layer is arranged between the base cloth and the surface layer, and the base cloth and the surface layer are adhered together through the adhesive layer; the surface layer and the glue layer both contain polyurethane, bridging agent, thickening agent, leveling agent and defoaming agent; meanwhile, a method for preparing the light, thin and flexible polyurethane leather is also provided, and comprises the steps of surface layer preparation, glue layer preparation, bonding and sticking the glue layer and the base cloth together, curing treatment and stripping, wherein the wear resistance, the breaking property, the tension, the crack and other strengths of the layers are enhanced along with the improvement of the components of the layers; in addition, the composite leather also has excellent light aging resistant effect, and avoids the phenomena of peeling, cracks and the like of the product after long-term sun exposure.
Description
Technical Field
The invention relates to the technical field of polyurethane composite materials, in particular to light, thin and flexible polyurethane leather and a preparation method of the leather.
Background
Polyurethane (abbreviated as PU) is short for Polyurethane, is a new organic polymer material, and is widely applied to numerous fields of national economy due to its excellent properties. Has the advantages that: the density is low, the texture is soft, and the wearing is comfortable and portable; the dimensional stability is good, and the storage life is long; excellent wear resistance and flexing resistance; excellent shock absorption and anti-skid performance; better temperature resistance; good chemical resistance, etc. The application field of the product relates to light industry, chemical industry, electronics, textile, medical treatment, building materials, automobiles, national defense, aerospace, aviation and the like. The polyurethane material is used as leather finishing agent, artificial leather, synthetic leather coating and shoe inner and outer soles, and the polyurethane is widely used for manufacturing high-grade leather shoes, automobile inner ornaments and the like.
Thermoplastic polyurethane elastomers (TPU) are largely classified into polyester and polyether types, and are plasticized by heating, and have no or little cross-linking in their chemical structure, and their molecules are essentially linear, but have some physical cross-linking. The halogen-free flame-retardant TPU can replace soft PVC to meet the environmental protection requirements of more and more fields.
The interior decoration material of passenger car is developing towards synthetic leather with light weight, environmental protection, energy saving, high wear resistance and high grade. The environment-friendly solvent-free synthetic leather of the polyurethane product is suitable for interior decoration of a vehicle, but the production process and the processing method of the environment-friendly solvent-free synthetic leather have the common problems of unstable quality and large product performance fluctuation in the processing process, and cannot meet the requirement of high strength, so that the production and manufacturing cost is high. Therefore, the invention provides light, thin and flexible polyurethane leather and a preparation method thereof.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides light, thin and flexible polyurethane leather which comprises base cloth, an adhesive layer and a surface layer, wherein the surface layer can enhance the surface film forming and abrasion resistance performance and improve the flexibility of a product by optimizing and improving the components of each layer; form stable film strength; after the film-forming strength of the polyurethane leather is improved, the abrasion resistance, the breaking property, the tension, the crack and other strengths of the polyurethane leather are enhanced. In addition, the polyurethane leather also has excellent light aging resistant effect, and avoids the phenomena of peeling, cracks and the like of products after long-term sun exposure.
In order to achieve the purpose, the invention provides light, thin and flexible polyurethane leather which comprises base cloth, an adhesive layer and a surface layer, wherein the adhesive layer is arranged between the base cloth and the surface layer; the base cloth and the surface layer are bonded and attached together through the adhesive layer.
The surface layer comprises polyurethane, a bridging agent, a thickening agent, a flatting agent, a defoaming agent and pigment; the adhesive layer comprises polyurethane, a bridging agent, a thickening agent, a flatting agent and a defoaming agent; the mass ratio of the surface layer to the adhesive layer to the base cloth is 1-1.2: 1: 1.
further, the surface layer comprises the following material components in parts by weight: 100 parts of polyurethane, 5-10 parts of bridging agent, 0.5-1 part of flatting agent, 0.3-1 part of defoaming agent, 10-20 parts of pigment and 20-50 parts of thickening agent;
further, the bridging agent is a multifunctional carbodiimide polymer, the leveling agent is an organic silicon polymer, the thickening agent is an acrylic polymer, and the defoaming agent is an organic silicon polymer.
Further, the glue layer comprises the following material components in parts by weight: 100 parts of polyurethane, 5-10 parts of bridging agent, 0.5-1 part of flatting agent, 0.5-2 parts of defoaming agent and 30-80 parts of thickening agent;
further, the base cloth is formed by weaving polyester fibers in a circular weaving mode; the thickness of the base cloth is less than or equal to 300 mu m, and the mass surface density of the base cloth is 100g/m2～220g/m2。
In order to achieve the above object, the present invention also provides a preparation method of the polyurethane leather, the preparation method comprising the steps of:
s1, preparing a surface layer, wherein the surface layer preparation comprises the steps of preparing surface layer liquid, defoaming the surface layer liquid, coating the surface layer liquid on release paper, and drying and forming the surface layer to obtain the surface layer;
s2, preparing a glue layer, wherein the glue layer preparation comprises the steps of preparing glue layer liquid, coating the glue layer liquid on the surface layer obtained in the step S1, and drying and forming the glue layer to obtain the glue layer;
s3, bonding, namely bonding the glue layer obtained in the step S2 and the base cloth together to form a leather blank;
s4, curing, namely curing the leather blank in the step S3 in an oven and cooling to obtain a cured leather blank;
s5, peeling off, namely peeling off the cured leather blank in the step S4 from release paper to obtain the finished product of polyurethane leather.
Preferably, the production environment temperature of the step S1 to the step S5 is 0 ℃ to 40 ℃, and the production environment humidity is 20% to 80%.
Further, the stirring speed of the surface layer liquid prepared in the step S1 is 720-880 rpm, the stirring time is 60-65 min, and the viscosity of the surface layer liquid is 3000-5000 cps.
Preferably, the treatment time of the surface layer liquid defoaming treatment in step S1 is 60 to 65 min; the negative pressure value of the negative pressure vacuum defoaming treatment is-90 kPa; stirring is carried out simultaneously with the defoaming treatment. The prepared surface layer liquid is defoamed by a circulating defoaming machine, the defoaming effect is fully ensured, and air is prevented from entering the surface layer liquid in the conveying process during recycling, so that the surface layer coating quality is improved.
Preferably, the coating speed of the surface layer liquid in the step S1 is 6 m/min-8 m/min, and the using amount is 70g/m2～90g/m2。
Preferably, the surface layer drying and forming temperature in the step S1 is 70-130 ℃, and the time is 25-35 min; the temperature is gradually increased from 70 ℃ to 130 ℃ by using a drying mode with gradually increased temperature.
Further, the stirring speed of the glue layer preparation liquid in the step S2 is 720 rpm-880 rpm.
Preferably, the coating speed of the glue line liquid in the step S2 is 6 m/min-8 m/min, and the using amount is 60g/m2～80g/m2。
Preferably, in the step S2, the drying and forming temperature of the adhesive layer is 90 to 110 ℃, the time is 25 to 35min, and the drying degree of the adhesive layer is 70 to 80%.
Furthermore, the speed of bonding in the step S3 is 6m/min to 8m/min, the pressure of bonding is 0.2MPa to 0.3MPa, and the gap of bonding is 0.2mm to 0.4 mm.
Further, the curing treatment temperature in the step S4 is 125-135 ℃, and the time is 70-90 min.
Compared with the prior art, the invention has the following beneficial effects:
1. the light, thin and flexible polyurethane leather comprises base cloth, an adhesive layer and a surface layer, and the wear resistance, the breaking property, the tension, the crack and other strengths of the polyurethane leather are enhanced by improving the components of each layer. In addition, the composite leather also has excellent light aging resistant effect, and avoids the phenomena of peeling, cracks and the like of the product after long-term sun exposure.
2. In addition, the surface layer can enhance the surface film forming and abrasion resistance through a special preparation method, and the flexibility of the product is improved; form stable film strength; particularly, the surface layer liquid in the step S1 is defoamed under vacuum negative pressure and is stirred at the same time, so that the defoaming effect is fully ensured, and air is prevented from entering the surface layer liquid in the conveying process during recycling, so that the surface layer coating quality is improved.
3. According to the light, thin and flexible polyurethane leather, the strength of the leather is improved through the polyurethane raw material and the leather structure of specific components, the component performance and the preparation process of the product, so that the purpose of prolonging the service life of the product is achieved, and the product competitiveness is improved.
Drawings
FIG. 1 is a process flow diagram of a method for preparing a light, thin and flexible polyurethane leather according to the present invention;
FIG. 2 is a schematic cross-sectional view of a thin and flexible polyurethane leather according to the present invention;
the labels in the figure are: 1-base cloth, 2-adhesive layer and 3-surface layer.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples, so that those skilled in the art can fully understand the technical contents of the present invention. It should be noted that the specific embodiments described herein are only for explaining the present invention and are not used to limit the present invention.
The invention provides light, thin and flexible polyurethane leather and a preparation method thereof, wherein the polyurethane leather comprises base cloth 1, an adhesive layer 2 and a surface layer 3, wherein the adhesive layer 2 is arranged between the base cloth 1 and the surface layer 3; base cloth 1 and surface course 3 bond the laminating through glue film 2 and are in the same place, and the mass ratio of surface course 3, glue film 2, base cloth 1 is 1 ~ 1.2: 1: 1.
the surface layer 3 comprises polyurethane, a bridging agent, a thickening agent, a flatting agent, a defoaming agent and pigment, wherein the surface layer 3 comprises the following material components in parts by weight: 100 parts of polyurethane, 5-10 parts of bridging agent, 0.5-1 part of flatting agent, 0.3-1 part of defoaming agent, 10-20 parts of pigment and 20-50 parts of thickening agent; the bridging agent is multifunctional carbodiimide polymer, the leveling agent is organic silicon polymer, the thickening agent is acrylic polymer, and the defoaming agent is organic silicon polymer.
The adhesive layer 2 comprises polyurethane, a bridging agent, a thickening agent, a flatting agent and a defoaming agent, wherein the adhesive layer 2 comprises the following material components in parts by mass: 100 parts of polyurethane, 5-10 parts of bridging agent, 0.5-1 part of flatting agent, 0.5-2 parts of defoaming agent and 30-80 parts of thickening agent;
the base cloth 1 is formed by weaving polyester fibers in a circular weaving mode; the thickness of the base cloth is less than or equal to 300 mu m, and the mass surface density is 100g/m2～220g/m2。
The invention also provides a preparation method of the light, thin and flexible polyurethane leather, which comprises the following steps:
s1, making a surface layer, wherein the making of the surface layer 3 comprises preparing surface layer liquid, defoaming the surface layer liquid, coating the surface layer liquid on release paper, and drying and forming the surface layer to obtain the surface layer 3; the stirring speed of the prepared surface layer liquid is 720-880 rpm, the stirring time is 60-65 min, and the viscosity of the surface layer liquid is 3000-5000 cps;
as a further improvement, the treatment time of the surface layer liquid defoaming treatment in the step S1 is 60min to 65 min; the negative pressure value of the negative pressure vacuum defoaming treatment is-90 kPa; stirring is carried out simultaneously with the defoaming treatment. The prepared surface layer liquid is defoamed by a circulating defoaming machine, the defoaming effect is fully ensured, and air is prevented from entering the surface layer liquid in the conveying process during recycling, so that the surface layer coating quality is improved. The coating speed of the surface layer liquid is 6 m/min-8 m/min, and the using amount is 70g/m2～90g/m2(ii) a The surface layer drying and forming temperature is 70-130 ℃, and the time is 25-35 min; and the temperature is gradually increased from 70 ℃ to 130 ℃ by using a drying mode with gradually increased temperature.
S2 preparing adhesive layer, wherein the adhesive layer 2 comprises preparing adhesive layer liquid and adhesive layerCoating the liquid on the surface layer obtained in the step S1, and drying and forming the glue layer to obtain a glue layer 2; the stirring speed of the prepared glue line liquid is 720 rpm-880 rpm, the coating processing speed of the glue line liquid is 6 m/min-8 m/min, and the using amount is 60g/m2～80g/m2(ii) a The drying and forming temperature of the adhesive layer is 90-110 ℃, the time is 25-35 min, and the drying degree of the adhesive layer is 70-80%.
S3, bonding and adhering the glue layer 2 obtained in the step S2 and the base cloth 1 together to form a leather blank; the bonding speed is 6m/min to 8m/min, the bonding pressure is 0.2MPa to 0.3MPa, and the bonding gap is 0.2mm to 0.4 mm.
S4, curing, namely curing the leather blank obtained in the step S3 in an oven and cooling to obtain a cured leather blank; the curing treatment temperature is 125-135 ℃, and the curing treatment time is 70-90 min.
S5, peeling off, namely peeling off the cured leather blank in the step S4 from release paper to obtain the finished product of polyurethane leather.
As a further improvement, the production environment temperature of the step S1 to the step S5 is 0 ℃ to 40 ℃, and the humidity is 20 percent to 80 percent.
Example 1:
the embodiment provides a light, thin and flexible polyurethane leather and a preparation method thereof,
preparing release paper and base cloth; the production environment temperature is 0-40 ℃, and the humidity is 20-80%;
s1, preparing a surface layer, namely selecting 100 parts of polyurethane, 5 parts of a bridging agent carbodiimide polymer, 0.5 part of a flatting agent organic silicon, 0.3 part of a defoaming agent organic silicon polymer, 10 parts of pigment inorganic pigment iron oxide and carbon black and 50 parts of a thickening agent acrylic polymer according to the material components of the surface layer 3; the stirring speed of the prepared surface layer liquid is 720-880 rpm, the stirring time is 60-65 min, and the viscosity of the surface layer liquid is 3000 cps; the treatment time of the surface liquid defoaming treatment is 60-65 min; the negative pressure value of the negative pressure vacuum defoaming treatment is-90 kPa; stirring while defoaming; the coating speed of the surface layer liquid is 8m/min, and the usage amount is 70g/m2(ii) a The surface layer is dried and formed at the temperature ofThe temperature is 70-130 ℃, and the time is 25-35 min; and the temperature is gradually increased from 70 ℃ to 130 ℃ by using a drying mode with gradually increased temperature.
And (S2) preparing an adhesive layer: according to the material components of the glue layer 2, 100 parts of polyurethane, 10 parts of bridging agent, 0.5 part of flatting agent, 2 parts of defoaming agent and 80 parts of thickening agent are selected to prepare glue layer liquid; the stirring speed of the prepared glue line liquid is 720 rpm-880 rpm, the coating processing speed of the glue line liquid is 6m/min, and the using amount is 80g/m2(ii) a The drying and forming temperature of the adhesive layer is 90-110 ℃, the time is 25-35 min, and the drying degree of the adhesive layer is 70%.
S3, bonding and adhering the glue layer 2 obtained in the step S2 and the base cloth 1 together to form a leather blank; the bonding speed is 7m/min, the bonding pressure is 0.2 MPa-0.3 MPa, and the bonding gap is 0.3 mm.
S4, curing, namely curing the leather blank obtained in the step S3 in an oven and cooling to obtain a cured leather blank; the curing treatment temperature is 125-135 ℃, and the curing treatment time is 70-90 min.
S5, peeling off, namely peeling off the cured leather blank in the step S4 from release paper to obtain the finished product of polyurethane leather.
The light, thin and flexible polyurethane leather prepared according to the method is subjected to performance detection, and the results are shown in table 1. As can be seen from the comparative examples in table 1, the light, thin and flexible polyurethane leather according to the present invention has greatly improved properties, in which the leather strength is increased by nearly one time, the transverse rupture strength is increased by 2.9 times, the vertical rupture strength is increased by more than one time, and the transverse rupture elongation is increased by 30% under the same deformation conditions.
Example 2:
the difference between the other light, thin and flexible polyurethane leather and the preparation method thereof provided in this example and example 1 is that:
s1 preparation of surface layer, selecting 100 parts of polyurethane, 8 parts of bridging agent carbodiimide polymer, 0.8 part of flatting agent organic silicon, 0.7 part of defoaming agent organic silicon polymer, 15 parts of pigment inorganic pigment iron oxide and carbon black, and 15 parts of thickening agent acrylic acid polymer according to the material components of the surface layer 340 parts of a composition; the stirring speed of the prepared surface layer liquid is 720-880 rpm, the stirring time is 60-65 min, and the viscosity of the surface layer liquid is 4000 cps; the treatment time of the surface liquid defoaming treatment is 60-65 min; the negative pressure value of the negative pressure vacuum defoaming treatment is-90 kPa; stirring while defoaming; the coating speed of the surface layer liquid is 6m/min, and the usage amount is 90g/m2(ii) a The surface layer drying and forming temperature is 70-130 ℃, and the time is 25-35 min; and the temperature is gradually increased from 70 ℃ to 130 ℃ by using a drying mode with gradually increased temperature.
And (S2) preparing an adhesive layer: according to the material components of the glue layer 2, 100 parts of polyurethane, 7 parts of bridging agent, 1 part of flatting agent, 1.5 parts of defoaming agent and 60 parts of thickening agent are selected to prepare glue layer liquid; the stirring speed of the prepared glue line liquid is 720 rpm-880 rpm, the coating processing speed of the glue line liquid is 7m/min, and the using amount is 75g/m2(ii) a The drying and forming temperature of the adhesive layer is 90-110 ℃, the time is 25-35 min, and the drying degree of the adhesive layer is 75%.
S3, bonding and adhering the glue layer 2 obtained in the step S2 and the base cloth 1 together to form a leather blank; the bonding speed is 7.5m/min, the bonding pressure is 0.2 MPa-0.3 MPa, and the bonding gap is 0.2 mm.
The light, thin and flexible polyurethane leather prepared according to the method is subjected to performance detection, and the results are shown in table 1.
Example 3:
the difference between the light, thin and flexible polyurethane leather provided in this embodiment and the preparation method thereof in embodiment 1 is that:
s1, preparing a surface layer, namely selecting 100 parts of polyurethane, 7.5 parts of a bridging agent carbodiimide polymer, 0.9 part of a leveling agent organic silicon, 0.6 part of a defoaming agent organic silicon polymer, 10-20 parts of pigment inorganic pigment iron oxide and carbon black and 20-50 parts of a thickening agent acrylic polymer according to the material components of the surface layer 3; the stirring speed of the prepared surface layer liquid is 720-880 rpm, the stirring time is 60-65 min, and the viscosity of the surface layer liquid is 5000 cps; the treatment time of the surface liquid defoaming treatment is 60-65 min; the negative pressure value of the negative pressure vacuum defoaming treatment is-90 kPa; the defoaming treatment is carried out simultaneouslyStirring is carried out when in use; the coating speed of the surface layer liquid is 7.5m/min, and the usage amount is 85g/m2(ii) a The surface layer drying and forming temperature is 70-130 ℃, and the time is 25-35 min; and the temperature is gradually increased from 70 ℃ to 130 ℃ by using a drying mode with gradually increased temperature.
And (S2) preparing an adhesive layer: according to the material components of the glue layer 2, 100 parts of polyurethane, 5 parts of bridging agent, 0.8 part of flatting agent, 1 part of defoaming agent and 30 parts of thickening agent are selected to prepare glue layer liquid; the stirring speed of the prepared glue line liquid is 720 rpm-880 rpm, the coating processing speed of the glue line liquid is 7m/min, and the using amount is 80g/m2(ii) a The drying and forming temperature of the adhesive layer is 90-110 ℃, the time is 25-35 min, and the drying degree of the adhesive layer is 80%.
S3, bonding and adhering the glue layer 2 obtained in the step S2 and the base cloth 1 together to form a leather blank; the bonding speed is 6.5m/min, the bonding pressure is 0.2 MPa-0.3 MPa, and the bonding gap is 0.4 mm.
The light, thin and flexible polyurethane leather prepared according to the method is subjected to performance detection, and the results are shown in table 1.
Table 1 Performance test Table for light, thin and flexible polyurethane leather
Through the above embodiments, it can be seen that the performance of the light, thin and flexible polyurethane leather of the present invention is greatly improved, wherein under the same deformation condition, the strength of the light, thin and flexible polyurethane leather is increased by nearly one time, the transverse breaking strength is increased by more than 2.9 times, the vertical breaking strength is increased by more than one time, and the transverse breaking elongation is increased by 30%. Has wide application prospect.
It should be noted that the above-mentioned preferred embodiments are merely illustrative of the technical concepts and features of the present invention, and are intended to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (10)
1. The utility model provides a light and thin flexible polyurethane leather, includes base cloth (1), glue film (2) and surface course (3), its characterized in that: a glue layer (2) is arranged between the base cloth (1) and the surface layer (3); base cloth (1) with surface course (3) pass through glue film (2) bond the laminating together, the mass ratio of surface course (3), glue film (2) and base cloth (1) is 1 ~ 1.2: 1: 1.
2. the light, thin and flexible polyurethane leather of claim 1, wherein: the surface layer (3) comprises polyurethane, a bridging agent, a thickening agent, a leveling agent, a defoaming agent and pigment; the glue layer (2) comprises polyurethane, a bridging agent, a thickening agent, a leveling agent and a defoaming agent.
3. The light, thin and flexible polyurethane leather according to claim 1 or 2, wherein: the surface layer (3) comprises the following material components in parts by weight: 100 parts of polyurethane, 5-10 parts of bridging agent, 0.5-1 part of flatting agent, 0.3-1 part of defoaming agent, 10-20 parts of pigment and 20-50 parts of thickening agent.
4. The light, thin and flexible polyurethane leather according to claim 1 or 2, wherein: the adhesive layer (2) comprises the following material components in parts by weight: 100 parts of polyurethane, 5-10 parts of bridging agent, 0.5-1 part of flatting agent, 0.5-2 parts of defoaming agent and 30-80 parts of thickening agent.
5. The light, thin and flexible polyurethane leather of claim 4, wherein: the bridging agent is a multifunctional carbodiimide polymer, the leveling agent is organic silicon, the thickening agent is an acrylic polymer, and the defoaming agent is an organic silicon polymer.
6. A preparation method of light, thin and flexible polyurethane leather is characterized by comprising the following steps:
s1, making a surface layer, wherein the making of the surface layer (3) comprises preparing surface layer liquid, defoaming the surface layer liquid, coating the surface layer liquid on release paper, and drying and forming the surface layer;
s2, manufacturing a glue layer, wherein the manufacturing of the glue layer (2) comprises preparing glue layer liquid, coating the glue layer liquid on the surface layer obtained in the step S1, and drying and forming the glue layer;
s3, bonding, namely bonding the glue layer (2) obtained in the step S2 and the base cloth (1) together to form a leather blank;
s4, curing, namely curing the leather blank in the step S3 in an oven and cooling to obtain a cured leather blank;
s5, peeling off, namely peeling off the cured leather blank in the step S4 from release paper to obtain the finished product of polyurethane leather.
7. The method for preparing light, thin and flexible polyurethane leather according to claim 6, wherein the method comprises the following steps:
the stirring speed of the prepared surface layer liquid in the step S1 is 720-880 rpm, the stirring time is 60-65 min, and the viscosity of the surface layer liquid is 3000-5000 cps.
8. The method for preparing light, thin and flexible polyurethane leather according to claim 6, wherein the method comprises the following steps:
the treatment time of the surface layer liquid defoaming treatment is 60-65 min; the negative pressure value of the negative pressure vacuum defoaming treatment is-90 kPa, and the defoaming treatment is carried out while stirring; the coating processing speed of the surface layer liquid is 6-8 m/min, and the using amount is 70g/m2～90g/m2(ii) a The surface layer drying and forming temperature is 70-130 ℃, and the time is 25-35 min.
9. The method for preparing light, thin and flexible polyurethane leather according to claim 6, wherein the method comprises the following steps:
the stirring speed of the prepared glue line liquid in the step S2 is 720-880 rpm, the coating speed of the glue line liquid is 6-8 m/min, and the usage amount is 60g/m2～80g/m2(ii) a The drying and forming temperature of the adhesive layer is 90-110 ℃, the time is 25-35 min, and the drying degree of the adhesive layer70 to 80 percent.
10. The method for preparing light, thin and flexible polyurethane leather according to claim 6, wherein the method comprises the following steps:
the speed of bonding in the step S3 is 6m/min to 8m/min, the bonding pressure is 0.2MPa to 0.3MPa, and the bonding gap is 0.2mm to 0.4 mm.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113605106A (en) * | 2021-08-12 | 2021-11-05 | 世联汽车内饰（苏州）有限公司 | Flame-retardant PU synthetic leather and preparation method thereof |
| CN113605107A (en) * | 2021-08-12 | 2021-11-05 | 世联汽车内饰（苏州）有限公司 | PU composite leather and preparation method thereof |
| CN114808475A (en) * | 2022-04-23 | 2022-07-29 | 苏州瑞高新材料有限公司 | Dry-type foamed PU sun-shading curtain leather and preparation method thereof |
| CN115538186A (en) * | 2022-09-28 | 2022-12-30 | 世联汽车内饰（苏州）有限公司 | Preparation method and preparation device of polyurethane synthetic leather |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103696274A (en) * | 2013-12-27 | 2014-04-02 | 四川大学 | Method for manufacturing foamed synthetic leather based on water-based resin and TPU (Thermoplastic Polyurethane) resin |
| CN103835145A (en) * | 2014-03-04 | 2014-06-04 | 合肥市科天化工有限公司 | Environmental-friendly waterproof and breathable clothing leather and preparation method thereof |
| CN103835144A (en) * | 2014-03-04 | 2014-06-04 | 合肥市科天化工有限公司 | Environmental-friendly and water-pressure-resistant tent leather and preparation method thereof |
| CN105401460A (en) * | 2015-08-26 | 2016-03-16 | 四川大学 | Solvent-free synthetic leather and manufacturing method thereof |
| CN107604685A (en) * | 2017-10-25 | 2018-01-19 | 安徽安利材料科技股份有限公司 | A kind of preparation method of high temperature resistant color inhibition no-solvent polyurethane synthetic leather |
-
2020
- 2020-08-06 CN CN202010784219.0A patent/CN111979790A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103696274A (en) * | 2013-12-27 | 2014-04-02 | 四川大学 | Method for manufacturing foamed synthetic leather based on water-based resin and TPU (Thermoplastic Polyurethane) resin |
| CN103835145A (en) * | 2014-03-04 | 2014-06-04 | 合肥市科天化工有限公司 | Environmental-friendly waterproof and breathable clothing leather and preparation method thereof |
| CN103835144A (en) * | 2014-03-04 | 2014-06-04 | 合肥市科天化工有限公司 | Environmental-friendly and water-pressure-resistant tent leather and preparation method thereof |
| CN105401460A (en) * | 2015-08-26 | 2016-03-16 | 四川大学 | Solvent-free synthetic leather and manufacturing method thereof |
| CN107604685A (en) * | 2017-10-25 | 2018-01-19 | 安徽安利材料科技股份有限公司 | A kind of preparation method of high temperature resistant color inhibition no-solvent polyurethane synthetic leather |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113605106A (en) * | 2021-08-12 | 2021-11-05 | 世联汽车内饰（苏州）有限公司 | Flame-retardant PU synthetic leather and preparation method thereof |
| CN113605107A (en) * | 2021-08-12 | 2021-11-05 | 世联汽车内饰（苏州）有限公司 | PU composite leather and preparation method thereof |
| CN114808475A (en) * | 2022-04-23 | 2022-07-29 | 苏州瑞高新材料有限公司 | Dry-type foamed PU sun-shading curtain leather and preparation method thereof |
| CN115538186A (en) * | 2022-09-28 | 2022-12-30 | 世联汽车内饰（苏州）有限公司 | Preparation method and preparation device of polyurethane synthetic leather |
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