CN107880430B - Raw material composition of synthetic leather surface layer and synthetic leather - Google Patents
Raw material composition of synthetic leather surface layer and synthetic leather Download PDFInfo
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- CN107880430B CN107880430B CN201710967117.0A CN201710967117A CN107880430B CN 107880430 B CN107880430 B CN 107880430B CN 201710967117 A CN201710967117 A CN 201710967117A CN 107880430 B CN107880430 B CN 107880430B
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
- C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/04—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C08L27/06—Homopolymers or copolymers of vinyl chloride
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/065—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of foam
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
- B32B27/22—Layered products comprising a layer of synthetic resin characterised by the use of special additives using plasticisers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
- B32B27/304—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/40—Layered products comprising a layer of synthetic resin comprising polyurethanes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
- B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
- B32B5/245—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it being a foam layer
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
- C08L75/04—Polyurethanes
- C08L75/08—Polyurethanes from polyethers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2266/00—Composition of foam
- B32B2266/02—Organic
- B32B2266/0214—Materials belonging to B32B27/00
- B32B2266/0221—Vinyl resin
- B32B2266/0235—Vinyl halide, e.g. PVC, PVDC, PVF, PVDF
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/54—Yield strength; Tensile strength
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/554—Wear resistance
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/04—Thermoplastic elastomer
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Synthetic Leather, Interior Materials Or Flexible Sheet Materials (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Laminated Bodies (AREA)
Abstract
The invention provides a raw material composition of a synthetic leather surface layer and synthetic leather. The raw material composition comprises PVC, TPU and a first plasticizer, and the weight ratio of the PVC to the TPU is 2: 8-5: 5. Because the raw material composition replaces partial PVC of the synthetic leather surface layer prepared in the prior art with TPU according to the proportion, the synthetic leather prepared from the raw material composition has higher tensile property and wear resistance by utilizing the excellent properties of TPU.
Description
Technical Field
The invention relates to the technical field of materials, in particular to a raw material composition of a synthetic leather surface layer and synthetic leather.
Background
leather is used as an interior material in various fields including the automobile industry, and leather generally includes natural leather and synthetic leather, wherein synthetic leather is currently widely used in the automobile industry and the like because it is cheaper in manufacturing cost and is easily mass-produced compared to natural leather.
In the preparation process of the synthetic leather, a surface layer and a bottom layer are generally prepared, then adhesive slurry such as PU (polyurethane) is coated on base cloth, then the base layer is formed by calendering, the bottom layer film is attached to the base cloth in a hot-melt state while being drawn out from a calendering roller, then the calendered surface layer film is attached by the same method, and finally the product obtained after the bottom layer and the surface layer are attached is subjected to foaming treatment to obtain the synthetic leather.
However, the conventional synthetic leather has the defects of poor tensile property and abrasion resistance under the condition that a client demands a thinner thickness.
Disclosure of Invention
The invention mainly aims to provide a raw material composition of a synthetic leather surface layer and synthetic leather, and aims to solve the problem that the synthetic leather in the prior art is poor in tensile property and wear resistance.
In order to achieve the above object, according to one aspect of the present invention, there is provided a raw material composition for a synthetic leather top layer, including PVC, TPU, and a first plasticizer, wherein a weight ratio of the PVC to the TPU is 2:8 to 5: 5.
Further, the weight part of the first plasticizer is 73-130 based on 100 weight parts of the PVC.
Further, the PVC accounts for 20-50 parts by weight, and the TPU accounts for 50-80 parts by weight.
Further, the first plasticizer comprises 70-110 parts by weight of dioctyl phthalate and 3-20 parts by weight of soybean oil.
further, the raw material composition further comprises a liquid barium zinc stabilizer, and the weight part of the liquid barium zinc stabilizer in the raw material composition is preferably 1.6-3.5.
further, the TPU is a polyether TPU, and preferably a halogen-free flame retardant polyether TPU.
according to another aspect of the invention, there is provided synthetic leather comprising a base fabric, a foamed layer and a surface layer sequentially stacked, wherein the surface layer is prepared from the above raw material composition.
Further, the raw materials for forming the foaming layer comprise 100 parts by weight of PVC, 110-190 parts by weight of a second plasticizer and 3-8 parts by weight of a foaming agent, preferably the second plasticizer comprises dioctyl phthalate and soybean oil, more preferably 80-130 parts by weight of dioctyl phthalate, and 30-60 parts by weight of soybean oil.
Further, the raw material for forming the foaming layer further comprises any one or more of a liquid barium zinc stabilizer, a powder barium zinc stabilizer, a foaming stabilizer, stearic acid and acrylic ester.
Furthermore, the weight part of the liquid barium-zinc stabilizer in the raw material for forming the foaming layer is 1.0-3.5, the weight part of the powder barium-zinc stabilizer is preferably 1-4, the weight part of the foaming stabilizer is preferably 1.5-4, the weight part of the stearic acid is preferably 0.2-2, and the weight part of the acrylic acid ester is preferably 0.3-3.
the technical scheme of the invention provides a raw material composition of a synthetic leather surface layer, which comprises PVC, TPU and a plasticizer, wherein the weight ratio of the PVC to the TPU is 2: 8-5: 5, and the TPU is replaced for part of PVC for preparing the synthetic leather surface layer in the prior art according to the proportion, so that the synthetic leather prepared from the raw material composition has high tensile property and wear resistance by utilizing the excellent properties of the TPU.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail with reference to examples.
in order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making an invasive task, shall fall within the scope of protection of the present invention.
it is noted that the terms first, second and the like in the description and in the claims of the present invention are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged under appropriate circumstances in order to facilitate the description of the embodiments of the invention herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
As described in the background art, the conventional synthetic leather has the defects of poor tensile property and abrasion resistance under the condition that a client demands a thinner thickness. The inventor of the application researches the problems and provides a raw material composition of a synthetic leather surface layer, which comprises PVC, TPU and a first plasticizer, wherein the weight ratio of the PVC to the TPU is 2: 8-5: 5.
The raw material composition of the synthetic leather surface layer comprises PVC, TPU and a plasticizer, the weight ratio of the PVC to the TPU is 2: 8-5: 5, and the TPU is replaced by part of the PVC for preparing the synthetic leather surface layer in the prior art according to the proportion, so that the synthetic leather prepared from the raw material composition has high tensile property and wear resistance by utilizing the excellent properties of the TPU.
In the raw material composition of the synthetic leather top layer, in order to enable the synthetic leather prepared from the raw material composition to have higher tensile property and wear resistance, preferably, the TPU is polyether TPU, and more preferably, the TPU is halogen-free flame retardant polyether TPU, but the TPU is not limited to the above preferred type, and those skilled in the art can reasonably select the type of the TPU according to the prior art; and, preferably, the weight part of the first plasticizer is 73 to 130, based on 100 weight parts of PVC; more preferably, the weight part of the PVC is 20-50, and the weight part of the TPU is 50-80.
In the above raw material composition for a synthetic leather top layer of the present invention, preferably, the first plasticizer includes dioctyl phthalate and soybean oil; in order to enable the synthetic leather prepared from the raw material composition to have higher tensile property and abrasion resistance, the weight parts of the dioctyl phthalate are more preferably 70-110 and the weight parts of the soybean oil are more preferably 3-20 based on 100 parts of the PVC. The kind of the first plasticizer is not limited to the above preferred ones, and those skilled in the art can select the kind of the first plasticizer appropriately according to the prior art, such as diisononyl phthalate (DINP), dioctyl terephthalate (DOTP), dipropylheptyl phthalate (DPHP), and the like.
In the raw material composition of the synthetic leather top layer, the raw material composition may further include a liquid barium zinc stabilizer, the content of the liquid barium zinc stabilizer in the raw material composition may be selected according to actual requirements, and in order to further improve the performance of the synthetic leather top layer, it is preferable that the weight part of the liquid barium zinc stabilizer in the raw material composition is 1.6 to 3.5 based on 100 parts by weight of PVC. The raw material composition may further include other kinds of additives besides the liquid barium zinc stabilizer, and those skilled in the art can reasonably select the kinds and the amounts of the additives according to the prior art.
According to another aspect of the application, the synthetic leather comprises a base cloth, a foaming layer and a surface layer which are sequentially stacked, wherein the surface layer is prepared from the raw material composition. Because the raw material composition of the surface layer in the synthetic leather comprises PVC, TPU and a plasticizer, and the weight ratio of the PVC to the TPU is 2: 8-5: 5, part of PVC for preparing the synthetic leather surface layer in the prior art is replaced by the TPU according to the proportion, the synthetic leather prepared from the raw material composition can have higher tensile property and wear resistance by utilizing the excellent properties of the TPU.
In the synthetic leather of the invention, a person skilled in the art can prepare the foaming layer and the surface layer by adopting a conventional preparation process in the prior art; in addition, the adhesive layer is arranged between the base cloth and the foaming layer, namely, the adhesive is coated on the base cloth, so that the adhesion between the base cloth and the foaming layer is improved, and the prepared synthetic leather product has higher bottom layer peel strength. The type of base fabric described above can be selected by those skilled in the art in view of the prior art.
In the synthetic leather, the content of each component in the raw material for forming the foaming layer can be selected according to actual requirements, and in order to improve the performance of the synthetic leather foaming layer, preferably, the raw material for forming the foaming layer comprises 100 parts by weight of PVC, 110-190 parts by weight of a second plasticizer and 3-8 parts by weight of a foaming agent, preferably, the second plasticizer comprises dioctyl phthalate and soybean oil, more preferably, 80-130 parts by weight of dioctyl phthalate, and 30-60 parts by weight of soybean oil.
In the synthetic leather of the present invention, the foaming agent may be a material commonly used in the existing synthetic leather products, and is not particularly limited in this application. In order to achieve a better foaming effect, the foaming agent is preferably selected from azodicarbonamide (i.e., AC foaming agent) and/or potassium azoformamide formate. The preferable foaming agent can meet the requirements of different foaming ratios, and has lower cost, thereby being suitable for the requirements of process batch production.
In the synthetic leather of the present invention, the raw material for forming the foaming layer may further include one or more of a liquid barium zinc stabilizer, a powder barium zinc stabilizer, a foaming stabilizer (i.e., a bubble adjusting agent), stearic acid, and acrylic ester, wherein stearic acid and acrylic ester are both lubricants. The content of each auxiliary agent can be selected according to actual requirements, in order to further improve the performance of the synthetic leather foaming layer, preferably, the weight part of the liquid barium-zinc stabilizer in the raw materials for forming the foaming layer is 1.0-3.5, preferably the weight part of the powder barium-zinc stabilizer is 1.0-4, preferably the weight part of the foaming stabilizer is 1.5-4.0, preferably the weight part of stearic acid is 0.2-2, and preferably the weight part of the acrylate is 0.3-3.
The raw material composition of the synthetic leather top layer and the synthetic leather provided by the invention will be further described with reference to the examples.
Example 1
The raw material composition of the synthetic leather facing layer provided in this example includes 50 parts by weight of PVC, 80 parts by weight of TPU (commercially available), and 35 parts by weight of a first plasticizer, where the first plasticizer includes dioctyl phthalate and soybean oil, the part by weight of dioctyl phthalate is 34 parts, and the part by weight of soybean oil is 1 part, and the PVC, dioctyl phthalate, and soybean oil are all conventional commercially available products.
Example 2
the raw material composition of the synthetic leather surface layer provided by the embodiment comprises 50 parts by weight of PVC, 50 parts by weight of TPU and 36.5 parts by weight of first plasticizer, wherein the first plasticizer comprises dioctyl phthalate and soybean oil, the weight part of dioctyl phthalate is 35, the weight part of soybean oil is 1.5, and the PVC, the dioctyl phthalate and the soybean oil are all conventional commercial products.
Example 3
The raw material composition of the synthetic leather top layer provided in this example includes 20 parts by weight of PVC, 80 parts by weight of TPU, and 26 parts by weight of a first plasticizer, where the first plasticizer includes dioctyl phthalate and soybean oil, the weight part of dioctyl phthalate is 22, the weight part of soybean oil is 4, and the PVC, dioctyl phthalate, and soybean oil are all conventional commercially available products.
Example 4
The raw material composition of the synthetic leather top layer provided in this example is different from that of example 3 in that:
The TPU contained in the raw material composition is halogen-free flame-retardant polyether TPU.
example 5
The raw material composition of the synthetic leather top layer provided in this example is different from that of example 4 in that:
The raw material composition also comprises 1.6 parts by weight of liquid barium zinc stabilizer (German bear brand, UBZ-293 TR).
Example 6
The raw material composition of the synthetic leather top layer provided in this example is different from that of example 4 in that:
The raw material composition also comprises 3.5 parts by weight of liquid barium zinc stabilizer.
Example 7
The raw material composition of the synthetic leather top layer provided in this example is different from that of example 4 in that:
The raw material composition also comprises 2.5 parts by weight of liquid barium zinc stabilizer.
Example 8
The preparation method of the synthetic leather provided by the embodiment comprises the following steps:
Preparing a synthetic leather surface layer by adopting the raw material composition of the synthetic leather surface layer in the example 1;
Preparing a synthetic leather bottom layer by using 100 parts by weight of PVC, 95 parts by weight of plasticizer and 10 parts by weight of foaming agent, wherein the plasticizer comprises 75 parts by weight of dioctyl phthalate and 20 parts by weight of soybean oil, the foaming agent is azodicarbonamide, and the PVC, the dioctyl phthalate and the soybean oil are conventional commercially available products;
And coating PVC slurry as an adhesive on the base cloth, arranging the synthetic leather bottom layer and the synthetic leather surface layer on the base cloth, and carrying out foaming treatment, wherein the synthetic leather bottom layer is foamed to form a foaming layer, so that the synthetic leather is obtained, and the foaming rate of the foaming treatment is 2.
Example 9
The preparation method of synthetic leather provided in this example is different from that of example 8 in that:
The raw material composition of the synthetic leather surface layer in example 2 was used to prepare a synthetic leather surface layer.
Example 9
The preparation method of synthetic leather provided in this example is different from that of example 8 in that:
The raw material composition of the synthetic leather surface layer in example 3 was used to prepare a synthetic leather surface layer.
Example 10
the preparation method of synthetic leather provided in this example is different from that of example 8 in that:
The raw material composition of the synthetic leather surface layer in example 4 was used to prepare a synthetic leather surface layer.
Example 11
The preparation method of synthetic leather provided in this example is different from that of example 8 in that:
The raw material composition of the synthetic leather surface layer in example 5 was used to prepare a synthetic leather surface layer.
example 12
The preparation method of synthetic leather provided in this example is different from that of example 8 in that:
The raw material composition of the synthetic leather top layer in example 6 was used to prepare a synthetic leather top layer.
Example 13
The preparation method of synthetic leather provided in this example is different from that of example 8 in that:
The raw material composition of the synthetic leather top layer in example 7 was used to prepare a synthetic leather top layer.
Example 14
The preparation method of synthetic leather provided in this example is different from example 13 in that:
The synthetic leather bottom layer is prepared by using 100 parts by weight of PVC, 30 parts by weight of dioctyl phthalate, 80 parts by weight of soybean oil and 30 parts by weight of foaming agent.
Example 15
The preparation method of synthetic leather provided in this example is different from example 13 in that:
An artificial leather base layer was prepared using 100 parts by weight of PVC, 70 parts by weight of dioctyl phthalate, 130 parts by weight of soybean oil, and 60 parts by weight of a foaming agent.
Example 16
The preparation method of synthetic leather provided in this example is different from example 13 in that:
the synthetic leather bottom layer was prepared from 100 parts by weight of PVC, 90 parts by weight of dioctyl phthalate, 40 parts by weight of soybean oil, 5 parts by weight of foaming agent, 0.5 part by weight of liquid barium zinc stabilizer (german bear brand, UBZ-293TR), 1 part by weight of foaming stabilizer (commercially available) and 0.1 part by weight of stearic acid.
example 17
The synthetic leather provided in this example differs from example 16 in that:
the weight portion of the liquid barium-zinc stabilizer is 1, the weight portion of the foaming stabilizer is 1.5, the weight portion of the stearic acid is 0.2, and the weight portion of the acrylate is 0.3.
Example 18
The synthetic leather provided in this example differs from example 16 in that:
The weight portion of the liquid barium-zinc stabilizer is 4, the weight portion of the foaming stabilizer is 4, the weight portion of the stearic acid is 2, and the weight portion of the acrylate is 3.
Example 19
The synthetic leather provided in this example differs from example 16 in that:
The synthetic leather bottom layer is prepared from 100 parts by weight of PVC, 100 parts by weight of dioctyl phthalate, 40 parts by weight of soybean oil, 5 parts by weight of foaming agent, 2 parts by weight of liquid barium-zinc stabilizer, 2 parts by weight of foaming stabilizer, 1 part by weight of stearic acid and 2 parts by weight of acrylic ester.
comparative example 1
The artificial leather provided by this comparative example differs from example 8 in that:
The raw material composition of the synthetic leather surface layer comprises 100 parts by weight of PVC, and does not comprise TPU.
Comparative example 2
The artificial leather provided by this comparative example differs from example 8 in that:
The raw material composition of the synthetic leather surface layer comprises 60 parts by weight of PVC and 40 parts by weight of TPU.
The mechanical properties (tensile load, tear load, burst strength, peel load) of the artificial leathers prepared in the above examples 8 to 19 and comparative examples 1 to 2 were measured, and the test results are shown in the following table:
| Performance of | Tensile load | Tear load | Burst strength | Peeling load | Index of abrasion resistance |
| unit of | N | N | MPa | N | Grade |
| Example 8 | 364 | 17 | 1.1 | 20 | 4 |
| Example 9 | 387 | 18 | 1.1 | 20 | 4-5 |
| Example 10 | 373 | 18 | 1.1 | 20 | 4-5 |
| Example 11 | 416 | 21 | 1.2 | 21 | 4-5 |
| Example 12 | 434 | 22 | 1.2 | 21 | 4-5 |
| Example 13 | 459 | 23 | 1.2 | 21 | 4-5 |
| Example 14 | 431 | 23 | 1.2 | 21 | 5 |
| example 15 | 471 | 25 | 1.3 | 21 | 5 |
| Example 16 | 465 | 25 | 1.3 | 21 | 5 |
| Example 17 | 512 | 28 | 1.3 | 22 | 5 |
| Example 18 | 526 | 29 | 1.3 | 22 | 5 |
| Example 19 | 568 | 31 | 1.3 | 22 | 5 |
| comparative example 1 | 350 | 16 | 1.1 | 20 | 4 |
| Comparative example 2 | 356 | 16 | 1.1 | 20 | 4 |
As can be seen from the above test results, the artificial leathers of examples 8 to 19 of the present application can have excellent mechanical properties such as tensile strength and toughness, compared to the artificial leathers of comparative examples 1 to 2; also, it can be seen by touching the artificial leathers in the above examples and comparative examples that the artificial leather using the TPU in the examples had a better hand feeling than the artificial leather in the comparative example.
From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects: the raw material composition comprises PVC, TPU and a plasticizer, the weight ratio of the PVC to the TPU is 2: 8-5: 5, and the TPU is replaced by a part of PVC for preparing the synthetic leather surface layer in the prior art according to the proportion, so that the synthetic leather prepared from the raw material composition has high tensile property and wear resistance by utilizing the excellent properties of the TPU.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (17)
1. the raw material composition of the synthetic leather surface layer is characterized by comprising PVC, TPU and a first plasticizer, wherein the weight ratio of the PVC to the TPU is 2: 8-5: 5, and the weight of the first plasticizer is 73-130 in terms of 100 parts by weight of the PVC.
2. A raw material composition according to claim 1, wherein the PVC is 20 to 50 parts by weight, and the TPU is 50 to 80 parts by weight.
3. The raw material composition according to claim 1, wherein the first plasticizer comprises dioctyl phthalate in an amount of 70 to 110 parts by weight and soybean oil in an amount of 3 to 20 parts by weight.
4. The feedstock composition of claim 3, further comprising a liquid barium zinc stabilizer.
5. The raw material composition according to claim 4, wherein the weight part of the liquid barium zinc stabilizer in the raw material composition is 1.6-3.5.
6. A feedstock composition according to claim 1, wherein said TPU is a polyether TPU.
7. The raw material composition as recited in claim 6, wherein the TPU is a halogen-free flame retardant polyether TPU.
8. Synthetic leather comprising a base fabric, a foamed layer and a top layer, which are sequentially laminated, wherein the top layer is prepared from the raw material composition according to any one of claims 1 to 7.
9. A synthetic leather according to claim 8, wherein the foaming layer is formed from 100 parts by weight of PVC, 110-190 parts by weight of a second plasticizer, and 3-8 parts by weight of a foaming agent.
10. A synthetic leather as defined in claim 9, wherein the second plasticizer comprises dioctyl phthalate and soybean oil.
11. A synthetic leather according to claim 10, wherein the dioctyl phthalate is 80-130 parts by weight, and the soybean oil is 30-60 parts by weight.
12. Synthetic leather according to any of claims 8 to 11, wherein the raw material forming the foamed layer further comprises any one or more of a liquid barium zinc stabilizer, a powdered barium zinc stabilizer, a foaming stabilizer, stearic acid and an acrylate.
13. A synthetic leather according to claim 12, wherein the liquid barium zinc stabilizer is 1.0-3.5 parts by weight of the raw materials forming the foamed layer.
14. A synthetic leather according to claim 13, wherein the powder barium zinc stabilizer is 1-4 parts by weight.
15. A synthetic leather according to claim 13, wherein the foaming stabilizer is present in an amount of 1.5 to 4 parts by weight.
16. A synthetic leather according to claim 13, wherein the stearic acid is present in an amount of 0.2 to 2 parts by weight.
17. a synthetic leather according to claim 13, wherein the acrylate is present in an amount of 0.3 to 3 parts by weight.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101481876A (en) * | 2008-01-31 | 2009-07-15 | 东莞市恩典皮具制品有限公司 | Aqueous polyurethane emulsion for synthetic leather and preparation thereof |
| CN104389194A (en) * | 2014-10-14 | 2015-03-04 | 福建宝利特集团有限公司 | PVC artificial leather and its preparation method |
| CN107237154A (en) * | 2017-06-22 | 2017-10-10 | 合肥冠怡涂层织物有限公司 | A kind of aqueous synthesis of artificial leather and its manufacture method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101481876A (en) * | 2008-01-31 | 2009-07-15 | 东莞市恩典皮具制品有限公司 | Aqueous polyurethane emulsion for synthetic leather and preparation thereof |
| CN104389194A (en) * | 2014-10-14 | 2015-03-04 | 福建宝利特集团有限公司 | PVC artificial leather and its preparation method |
| CN107237154A (en) * | 2017-06-22 | 2017-10-10 | 合肥冠怡涂层织物有限公司 | A kind of aqueous synthesis of artificial leather and its manufacture method |
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