阅读说明：本技术 耐磨防污高物性消费电子用聚氨酯合成革及其制备方法 (Wear-resistant antifouling high-physical-property polyurethane synthetic leather for consumer electronics and preparation method thereof ) 是由 阚道俊 迟红梅 陈泽 吴祝明 阮仁祥 邢邦安 于 2020-11-04 设计创作，主要内容包括：本发明公开了一种耐磨防污高物性消费电子用聚氨酯合成革及其制备方法,所述耐磨防污高物性消费电子用聚氨酯合成革由外至内依次包括防污层、面层、中间层、粘接层和基布层；所述防污层由水性聚丙烯酸浆料制成,面层由聚碳型聚氨酯浆料制成,所述中间层由聚醚型聚氨酯浆料制成,所述粘接层为双组份聚醚型聚氨酯浆料制成,所述基布为涤纶针织布。本发明采用高耐磨、高耐水解聚氨酯树脂贴合布基,再通过水性聚碳型聚氨酯防污处理剂处理,制得的消费电子用高物性合成革,手感丰满、触感细腻、耐用性强、为消费电子用材料提供的新的选择。(The invention discloses wear-resistant antifouling high-physical-property polyurethane synthetic leather for consumer electronics and a preparation method thereof, wherein the wear-resistant antifouling high-physical-property polyurethane synthetic leather for consumer electronics sequentially comprises an antifouling layer, a surface layer, a middle layer, an adhesive layer and a base cloth layer from outside to inside; the antifouling layer is made of water-based polyacrylic slurry, the surface layer is made of polycarbonate polyurethane slurry, the middle layer is made of polyether polyurethane slurry, the bonding layer is made of double-component polyether polyurethane slurry, and the base cloth is polyester knitted cloth. According to the invention, the high-wear-resistance and high-hydrolysis-resistance polyurethane resin is adopted to be attached to the cloth base, and then the cloth base is treated by the waterborne polycarbon type polyurethane antifouling treatment agent, so that the prepared high-physical-property synthetic leather for consumer electronics has the advantages of plump hand feeling, fine touch feeling and strong durability, and provides a new choice for materials for consumer electronics.)

1. The utility model provides a wear-resisting antifouling high rerum natura polyurethane synthetic leather for consumer electronics which characterized in that: the antifouling coating sequentially comprises an antifouling layer, a surface layer, an intermediate layer, an adhesive layer and a base cloth layer from outside to inside; the antifouling layer is made of water-based polyacrylic slurry, the surface layer is made of polycarbonate polyurethane slurry, the middle layer is made of polyether polyurethane slurry, the bonding layer is made of double-component polyether polyurethane slurry, and the base cloth is polyester knitted cloth.

2. The polyurethane synthetic leather for consumer electronics according to claim 1, wherein the polyurethane synthetic leather comprises: the polycarbonate polyurethane slurry comprises the following components in parts by weight: 100 parts of water-based polyacrylic resin and 2-5 parts of water-based curing agent.

3. The polyurethane synthetic leather for consumer electronics according to claim 1, wherein the polyurethane synthetic leather comprises: the polycarbonate polyurethane slurry comprises the following components in parts by weight: 100 parts of polycarbonate polyurethane resin, 30-50 parts of DMF solvent, 0.1-0.5 part of flatting agent and 5-20 parts of color paste.

4. The polyurethane synthetic leather for consumer electronics according to claim 1, wherein the polyurethane synthetic leather comprises: the polyether polyurethane slurry comprises the following components in parts by weight: 100 parts of polyether polyurethane resin, 30-50 parts of DMF solvent, 0.1-0.5 part of flatting agent and 5-20 parts of color paste.

5. The polyurethane synthetic leather for consumer electronics according to claim 1, wherein the polyurethane synthetic leather comprises: the two-component polyether polyurethane slurry comprises the following components in parts by weight: 100 parts of two-component polyether polyurethane resin, 10-30 parts of DMF solvent, 0.1-0.5 part of flatting agent, 5-20 parts of color paste and 2-5 parts of curing agent.

6. The method for preparing the wear-resistant antifouling high-physical-property polyurethane synthetic leather for consumer electronics according to any one of claims 1 to 5, wherein the method comprises the following steps: the method comprises the following steps:

s1, coating a layer of polycarbonate polyurethane slurry on release paper, and drying to obtain a surface layer;

s2, coating a layer of polyether polyurethane slurry on the surface layer, and drying to obtain a middle layer;

s3, coating a layer of double-component polyether polyurethane slurry on the surface of the middle layer, drying to be in a semi-dry state, attaching the double-component polyether polyurethane slurry to base cloth, continuously drying and curing, and stripping release paper to obtain a dry semi-finished product;

s4, coating a layer of water-based polyacrylic acid slurry on the surface of the surface layer of the dry-method semi-finished product, and drying and curing to form an antifouling layer, so that the wear-resistant antifouling high-physical-property polyurethane synthetic leather for the consumer electronics is obtained.

7. The method of claim 6, wherein: in step S1, the coating thickness of the polycarbonate polyurethane slurry is 0.15-0.2 mm; the drying temperature is 100-130 ℃.

8. The method of claim 6, wherein: in the step S2, the coating thickness of the polyether polyurethane slurry is 0.25-0.3 mm; the drying temperature is 100-130 ℃.

9. The method of claim 6, wherein: in the step S3, the coating thickness of the two-component polyether polyurethane slurry is 0.25-0.3 mm; the drying temperature is 80-110 ℃, and the drying and curing temperature is 120-140 ℃.

10. The method of claim 6, wherein:in step S4, the coating amount of the aqueous polyacrylic acid slurry is 15-25g/m²(ii) a The temperature for drying and curing is 140-160 ℃.

Technical Field

The invention belongs to the field of polyurethane synthetic leather manufacturing, and particularly relates to wear-resistant antifouling high-physical-property polyurethane synthetic leather for consumer electronics and a preparation method thereof.

Background

Currently, consumer electronics are used in larger and larger quantities, and some packaging materials are used more and more. For example, the materials used for the mobile phone backshell, the tablet computer keyboard and the like can be selected in various ways, such as plastic materials, metal materials, glass materials and the like, and each material has certain defects, such as low grade of plastic materials, easy deformation of metal materials and easy breakage of glass materials. In recent years, the mobile phone back shell made of leather is gradually welcomed, and the material has the advantages of plump and fine hand feeling, high grade, no breakage and difficult deformation, and provides new selection and experience for the mobile phone back shell material. However, the leather material has poor wear resistance, is easy to break during use and has short service life.

The polyurethane synthetic leather has the advantages of high strength, soft texture and the like, has good processing performance, and is an ideal leather-like product for replacing natural leather. However, the wear resistance and hydrolysis resistance of the existing synthetic leather products are general, and the requirements of consumer electronics products cannot be met.

Disclosure of Invention

Aiming at the defects of the prior art, the invention aims to provide wear-resistant antifouling high-physical-property polyurethane synthetic leather for consumer electronics, which sequentially comprises an antifouling layer, a surface layer, an intermediate layer, an adhesive layer and a base cloth layer from outside to inside; the antifouling layer is made of water-based polyacrylic acid slurry, the surface layer is made of polycarbonate polyurethane slurry, the middle layer is made of polyether polyurethane slurry, the bonding layer is made of two-component polyether polyurethane slurry, the base cloth is polyester knitted fabric, and the thickness of the base cloth is 0.25-0.35 mm.

Further, the aqueous polyacrylic acid slurry comprises the following components in parts by weight: 100 parts of water-based polyacrylic resin and 2-5 parts of water-based curing agent.

Further, the polycarbonate polyurethane slurry comprises the following components in parts by weight: 100 parts of polycarbonate polyurethane resin, 30-50 parts of DMF solvent, 0.1-0.5 part of flatting agent and 5-20 parts of color paste.

Further, the polyether polyurethane slurry comprises the following components in parts by weight: 100 parts of polyether polyurethane resin, 30-50 parts of DMF solvent, 0.1-0.5 part of flatting agent and 5-20 parts of color paste.

Further, the two-component polyether polyurethane slurry comprises the following components in parts by weight: 100 parts of two-component polyether polyurethane resin, 10-30 parts of DMF solvent, 0.1-0.5 part of flatting agent, 5-20 parts of color paste and 2-5 parts of curing agent.

The invention also aims to provide a preparation method of the wear-resistant antifouling high-physical-property polyurethane synthetic leather for consumer electronics, which comprises the following steps:

s1, coating a layer of high-wear-resistance polycarbonate polyurethane slurry on release paper, and drying to obtain a surface layer; further, the coating thickness of the water-based polyacrylic acid slurry is 0.15-0.2 mm; the drying temperature is 100-130 ℃;

s2, coating a layer of polyether polyurethane slurry on the surface layer, and drying to obtain a middle layer; further, the coating thickness of the polyether polyurethane slurry is 0.25-0.3 mm; the drying temperature is 100-130 ℃.

S3, coating a layer of double-component polyether polyurethane slurry on the surface of the middle layer, drying to be in a semi-dry state, attaching the double-component polyether polyurethane slurry to the base cloth, continuously drying and curing, and peeling the release paper to obtain a dry semi-finished product. Further, the coating thickness of the two-component polyether polyurethane slurry is 0.25-0.3 mm; the drying temperature is 80-110 ℃, and the drying curing temperature is 120-140 ℃.

S4, coating a layer of water-based polyacrylic acid slurry on the surface of the surface layer of the dry-method semi-finished product through a gravure roller, and drying and curing to form an antifouling layer, thus obtaining the wear-resistant antifouling high-physical-property polyurethane synthetic leather for consumer electronics. Further, the coating amount of the water-based polyacrylic acid slurry is 15-25g/m²(ii) a The temperature for drying and curing is 140-160 ℃.

Compared with the prior art, the invention has the beneficial effects that:

the polyurethane synthetic leather for the consumer electronics has higher wear resistance and hydrolysis resistance, and the polyurethane materials with polycarbonate type and polyether type structures with better physical properties are selected, so that the polyurethane synthetic leather has better wear resistance and durability compared with the traditional electronic packaging material adopting a polyester structure. Therefore, the product is more suitable for products such as mobile phone backshells, tablet personal computer keyboards and the like than the traditional synthetic leather electronic packaging material, and the prepared product has high grade, good physical property, low cost and excellent market prospect.

Detailed Description

The present invention will be further described with reference to the following examples. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In order that the invention may be more fully understood, reference will now be made to the specific embodiments illustrated. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

In the following examples, the aqueous polyacrylic acid resin used in the anti-fouling layer is aqueous polyacrylic acid anti-fouling treatment agent SF-6210, the aqueous curing agent SF-150 is a product of Zhejiang Shunfa chemical auxiliary agent Co., Ltd, the polycarbonate polyurethane resin used in the surface layer is polycarbonate polyurethane resin LY-130PC of Hefei anli polyurethane New Material Co., Ltd, the polyether polyurethane resin used in the middle layer is polyether polyurethane resin LT-8441 of Hefei anli polyurethane New Material Co., Ltd, the two-component polyether polyurethane resin used in the adhesive layer is polyether polyurethane resin LA-5568 of Hefei anli polyurethane New Material Co., Ltd, the curing agent matched with LA5568 is LA-75 of Hefei anli polyurethane New Material Co., Ltd, and the leveling agents used in the surface layer and the middle layer are leveling agents BYK-9565 of Bike chemical Co., Ltd, the color pastes are all products of Zhejiang deep blue science and technology limited, and the rest are all commercial products.

Example 1

The wear-resistant antifouling high-physical-property polyurethane synthetic leather for consumer electronics in the embodiment is prepared by the following steps:

s1, adopting a release paper transfer method to paste the surface, firstly coating a layer of 0.15mm thick polycarbonate polyurethane slurry on the release paper, and drying at 100 ℃ to be used as a surface layer;

s2, coating a layer of polyether polyurethane slurry with the thickness of 0.2mm on the surface layer, and drying at 100 ℃ to form a middle layer;

s3, coating a layer of 0.2 mm-thick two-component polyether polyurethane slurry on the surface of the middle layer to serve as an adhesive layer, adhering the adhesive layer to a cloth base in a state that the adhesive layer is dried to be semi-dry at the temperature of 85 ℃, continuously drying and curing at the temperature of 125 ℃, and stripping release paper to obtain a semi-finished product;

s4, coating a layer of water-based polyacrylic acid slurry on the surface of the surface layer of the dry-process semi-finished product by a gravure roller, wherein the coating amount is 15g/m²Drying and curing at 140 ℃ to form an antifouling layer, thus obtaining the wear-resistant antifouling polyurethane synthetic leather for consumer electronics with high physical properties;

wherein, the polyether polyurethane slurry of the surface layer is prepared from the following components in parts by mass: 100 parts of polycarbonate polyurethane resin LY-130pc, 50 parts of DMF solvent, 0.01 part of flatting agent BYK-9565 and 8 parts of color paste;

the polyether polyurethane resin slurry of the middle layer is prepared from the following components in parts by mass: 100 parts of polyether polyurethane resin LT-8441A, 50 parts of DMF solvent, 0.01 part of flatting agent BYK-9565 and 14 parts of color paste;

the polyether polyurethane resin slurry of the bonding layer is prepared from the following components in parts by mass: 100 parts of polyether polyurethane resin LA-5568, 30 parts of DMF solvent, 0.02 part of flatting agent BYK-9565 and 2 parts of curing agent LA-75;

the water-based polyacrylic acid slurry is prepared from the following components in parts by mass: 100 parts of a water-based polyacrylic acid type antifouling treatment agent SF-6210 and 2 parts of a water-based curing agent SF-150;

the wear-resistant antifouling polyurethane synthetic leather for consumer electronics prepared by the embodiment has the following characteristics: abrasion resistance H22X 1KG 1000 times does not break (reference standard: ASTM-D3884), and does not fog and powdering after 5 weeks of constant temperature and humidity detection at 70 ℃ X95% RH (reference standard: QB/T4671-2014).

Example 2

The wear-resistant antifouling high-physical-property polyurethane synthetic leather for consumer electronics in the embodiment is prepared by the following steps:

s1, adopting a release paper transfer method to paste the surface, firstly coating a layer of 0.17mm thick polycarbonate polyurethane slurry on the release paper, and drying at 110 ℃ to form a surface layer;

s2, coating a layer of polyether polyurethane slurry with the thickness of 0.25mm on the surface layer, and drying at 110 ℃ to form a middle layer;

s3, coating a layer of 0.22 mm-thick two-component polyether polyurethane slurry on the surface of the middle layer to serve as an adhesive layer, adhering the adhesive layer to a cloth base in a state that the adhesive layer is dried to be semi-dry at the temperature of 90 ℃, continuously drying and curing at the temperature of 125 ℃, and stripping release paper to obtain a semi-finished product;

s4, coating a layer of water-based polyacrylic acid slurry on the surface of the surface layer of the dry-process semi-finished product by a gravure roller, wherein the coating amount is 18g/m²Drying and curing at 145 ℃ to form an antifouling layer, thus obtaining the wear-resistant antifouling polyurethane synthetic leather for consumer electronics with high physical properties;

wherein, the polyether polyurethane slurry of the surface layer is prepared from the following components in parts by mass: 100 parts of polycarbonate polyurethane resin LY-130pc, 45 parts of DMF solvent, 0.02 part of flatting agent BYK-9565 and 10 parts of color paste;

the polyether polyurethane resin slurry of the middle layer is prepared from the following components in parts by mass: 100 parts of polyether polyurethane resin LT-8441A, 45 parts of DMF solvent, 0.02 part of flatting agent BYK-9565 and 15 parts of color paste;

the polyether polyurethane resin slurry of the bonding layer is prepared from the following components in parts by mass: 100 parts of polyether polyurethane resin LA-5568, 25 parts of DMF solvent, 0.03 part of flatting agent BYK-9565 and 3 parts of curing agent LA-75;

the water-based polyacrylic acid slurry is prepared from the following components in parts by mass: 100 parts of a water-based polyacrylic acid type antifouling treatment agent SF-6210 and 3 parts of a water-based curing agent SF-150;

the wear-resistant antifouling polyurethane synthetic leather for consumer electronics prepared by the embodiment has the following characteristics: abrasion resistance H22X 1KG 1300 times does not break (reference standard: ASTM-D3884), and does not fog and powdering after 6 weeks of constant temperature and humidity detection at 70 ℃ X95% RH (reference standard: QB/T4671-2014).

Example 3

The wear-resistant antifouling high-physical-property polyurethane synthetic leather for consumer electronics in the embodiment is prepared by the following steps:

s1, adopting a release paper transfer method to paste the surface, firstly coating a layer of 0.18mm thick polycarbonate polyurethane slurry on the release paper, and drying at 115 ℃ to form a surface layer;

s2, coating a layer of polyether polyurethane slurry with the thickness of 0.27mm on the surface layer, and drying at 120 ℃ to form a middle layer;

s3, coating a layer of two-component polyether polyurethane slurry with the thickness of 0.25mm on the surface of the middle layer to serve as an adhesive layer, adhering the adhesive layer to a cloth base in a state that the adhesive layer is dried to be semi-dry at the temperature of 100 ℃, continuously drying and curing at the temperature of 130 ℃, and stripping release paper to obtain a semi-finished product;

s4, coating a layer of water-based polyacrylic acid slurry on the surface of the surface layer of the dry-process semi-finished product by a gravure roller, wherein the coating amount is 22g/m²Drying and curing at 150 ℃ to form an antifouling layer, thus obtaining the wear-resistant antifouling polyurethane synthetic leather for consumer electronics with high physical properties;

wherein, the polyether polyurethane slurry of the surface layer is prepared from the following components in parts by mass: 100 parts of polycarbonate polyurethane resin LY-130pc, 40 parts of DMF solvent, 0.03 part of flatting agent BYK-9565 and 12 parts of color paste;

the polyether polyurethane resin slurry of the middle layer is prepared from the following components in parts by mass: 100 parts of polyether polyurethane resin LT-8441A, 40 parts of DMF solvent, 0.025 part of flatting agent BYK-9565 and 18 parts of color paste;

the polyether polyurethane resin slurry of the bonding layer is prepared from the following components in parts by mass: 100 parts of polyether polyurethane resin LA-5568, 20 parts of DMF solvent, 0.035 parts of flatting agent BYK-9565 and 4 parts of curing agent LA-75;

the water-based polyacrylic acid slurry is prepared from the following components in parts by mass: 100 parts of water-based polyacrylic acid type antifouling treating agent SF-6210 and 4 parts of water-based curing agent SF-150.

The wear-resistant antifouling polyurethane synthetic leather for consumer electronics prepared by the embodiment has the following characteristics: abrasion resistance H22X 1KG 1600 times does not break (reference standard: ASTM-D3884), and does not fog and powdering after 7 weeks of constant temperature and humidity detection at 70 ℃ X95% RH (reference standard: QB/T4671-.

Example 4

The wear-resistant antifouling high-physical-property polyurethane synthetic leather for consumer electronics in the embodiment is prepared by the following steps:

s1, adopting a release paper transfer method to paste the surface, firstly coating a layer of 0.2mm thick polycarbonate polyurethane slurry on the release paper, and drying at 125 ℃ to be used as a surface layer;

s2, coating a layer of polyether polyurethane slurry with the thickness of 0.3mm on the surface layer, and drying at 130 ℃ to form a middle layer;

s3, coating a layer of 0.3 mm-thick two-component polyether polyurethane slurry on the surface of the middle layer to serve as an adhesive layer, adhering the adhesive layer to a cloth base in a state that the adhesive layer is dried to be semi-dry at the temperature of 110 ℃, continuously drying and curing at the temperature of 140 ℃, and stripping release paper to obtain a semi-finished product;

s4, coating a layer of water-based polyacrylic acid slurry on the surface of the surface layer of the dry-process semi-finished product by a gravure roller, wherein the coating amount is 25g/m²Drying and curing at 160 ℃ to form an antifouling layer, thus obtaining the wear-resistant antifouling high-physical-property consumptionPolyurethane synthetic leather for electronics;

wherein, the polyether polyurethane slurry of the surface layer is prepared from the following components in parts by mass: 100 parts of polycarbonate polyurethane resin LY-130pc, 30 parts of DMF solvent, 0.035 parts of flatting agent BYK-9565 and 20 parts of color paste;

the polyether polyurethane resin slurry of the middle layer is prepared from the following components in parts by mass: 100 parts of polyether polyurethane resin LT-8441A, 30 parts of DMF solvent, 0.03 part of flatting agent BYK-9565 and 20 parts of color paste;

the polyether polyurethane resin slurry of the bonding layer is prepared from the following components in parts by mass: 100 parts of polyether polyurethane resin LA-5568, 10 parts of DMF solvent, 0.04 part of flatting agent BYK-9565 and 5 parts of curing agent LA-75;

the water-based polyacrylic acid slurry is prepared from the following components in parts by mass: 100 parts of a water-based polyacrylic acid type antifouling treatment agent SF-6210 and 5 parts of a water-based curing agent SF-150;

the wear-resistant antifouling polyurethane synthetic leather for consumer electronics prepared by the embodiment has the following characteristics: abrasion resistance H22X 1KG 2000 times does not break (reference standard: ASTM-D3884), and does not fog and powdering after 8 weeks of constant temperature and humidity detection at 70 ℃ X95% RH (reference standard: QB/T4671-.

From the physical property tests of the synthetic leather products prepared by the above listed examples, the wear resistance test H22X 1KG can be more than 1000 times, while the common electronic packaging synthetic leather product can only reach about 300 times, the hydrolysis resistance test at 70 ℃ and 95% RH constant temperature and humidity can reach more than 5 weeks without hydrolysis, while the common electronic packaging synthetic leather product can only ensure that the hydrolysis resistance test at 70 ℃ and 95% RH constant temperature and humidity can not be performed within 2 weeks, and the durability of the product is far superior to that of the common electronic packaging product.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.