CN115416387A - Leather rear cover and preparation method thereof - Google Patents

Abstract

The invention discloses a leather rear cover and a preparation method thereof, and the leather rear cover comprises a base material layer, a reinforcing layer arranged on the surface of the base material layer, and an organic silicon leather layer arranged on the surface of the reinforcing layer, wherein the base material layer is selected from a PC (polycarbonate) plate or a PMMA (polymethyl methacrylate)/PC composite plate, and the reinforcing layer is selected from one of glass fiber, carbon fiber, aramid fiber or glass fiber/carbon fiber composite materials. This lid behind leather class is with the substrate layer, enhancement layer and organosilicon leather layer are in the same place compound, the surface can provide high-end feeling by organosilicon leather layer, feel, the enhancement layer is selected from glass fibre, carbon fibre, aramid fiber or glass fibre/among the fine combined material of carbon, not only can reduce the thickness of back lid, and can provide sufficient intensity, the substrate layer is selected from PC board or PMMA PC composite sheet, can not influence cell-phone signal, thereby both satisfied the experience of consumer's adversary's feeling or feel, light and thin demand has been reached again, and adopt high-pressure forming and CNC processing technology can realize mass production, and the production efficiency is improved, the cost of back lid is greatly reduced.

Description

Leather rear cover and preparation method thereof

Technical Field

The invention relates to the technical field of rear cover manufacturing of electronic products, in particular to a leather rear cover and a preparation method thereof.

Background

With the coming of the 5G era, rear covers of consumer electronic products such as mobile phones and flat plate products are gradually eliminated due to the influence of metal on signals, the PMMA/PC composite plate does not influence mobile phone signals due to the characteristics of plastic materials, high surface hardness (glass imitation effect) can be realized through processes such as surface shower coating, and colorful decoration effect can be realized through processes such as UV transfer printing/PVD/silk screen printing on the inner layer, so that the composite plate is widely applied to the rear covers of the mobile phones.

With the development of technology and the higher demand of consumers for portable electronic products, on the one hand, lighter and thinner requirements are put forward; on the other hand, higher requirements are provided for hand feeling or texture, but the mainstream glass and plastic materials can not meet the requirements at present. Leather materials can meet high-end requirements in the aspects of hand feeling and texture, but the leather materials do not have strength, so that the leather materials are required to be combined with other materials to prepare the mobile phone rear cover.

At present, the preparation process of the leather rear cover of the mobile phone mainly comprises the following steps: firstly, leather is attached to an injection molding part, the thickness of the injection molding part is generally more than 0.6mm, the thickness of the leather is more than 0.4mm, the total thickness of a product is more than 1.0mm, and the injection molding part is made of PC/ABS and other materials, so that the strength is not high; the second is to laminate leather and composite material pieces such as glass fiber carbon fiber, for example, chinese patent CN114193809A discloses a carbon fiber glass mobile phone rear cover molding process and a mobile phone rear cover, the mobile phone rear cover is prepared by adopting a glass fiber carbon prepreg and leather through covering and hot press molding processes, the introduction of the composite material greatly improves the strength of the mobile phone rear cover, and can significantly reduce the thickness of the product (the thickness of the glass fiber rear cover is 0.3-0.5mm, and the thickness of the covered leather does not exceed 0.8 mm).

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide the leather rear cover and the preparation method thereof, which can meet the experience of consumers on hand feeling or texture, can meet the design of lighter and thinner products, can improve the production efficiency and greatly reduce the cost of the rear cover.

In order to achieve the above purpose, on one hand, the invention discloses a leather rear cover, which comprises a base material layer, a reinforcing layer arranged on the surface of the base material layer, and an organic silicon leather layer arranged on the surface of the reinforcing layer, wherein the base material layer is selected from a PC board or a PMMA/PC composite board, and the reinforcing layer is selected from one of glass fiber, carbon fiber, aramid fiber or a glass fiber/carbon fiber composite material.

Compared with the prior art, the leather rear cover has the advantages that the base material layer, the reinforcing layer and the organic silicon leather layer are compounded and overlapped together, wherein the organic silicon leather layer on the surface can provide high-end hand feeling and texture, the reinforcing layer is selected from one of glass fiber, carbon fiber, aramid fiber or glass fiber/carbon fiber composite materials, the thickness of the rear cover can be reduced, enough strength can be provided, the base material layer is selected from a PC board or a PMMA/PC composite board, mobile phone signals cannot be influenced, accordingly, the hand feeling or texture experience of a consumer is met, the light and thin requirements are met, mass production can be achieved by adopting high-pressure forming and CNC (computer numerical control) processing technology, the production efficiency is improved, and the cost of the mobile phone rear cover is greatly reduced.

On the other hand, the invention also discloses a preparation method of the leather rear cover, which can adopt high-pressure forming and CNC (computer numerical control) machining processes, is particularly suitable for the preparation of a sheet-to-sheet production process, can realize mass production, improves the production efficiency and greatly reduces the cost of the rear cover. The preparation method comprises the following steps:

(1) Bonding and fixing the organic silicon leather layer and the reinforcing layer;

(2) Providing a substrate layer, coating UV glue on the surface of the substrate layer, attaching a reinforcing layer on the UV glue and carrying out photocuring to bond the reinforcing layer and the substrate layer;

(3) And (5) high-pressure forming and punching the shape of the product to obtain the product.

Drawings

FIG. 1 is a schematic view of the structure of the leather-like rear cover of the present invention.

Detailed Description

The present invention will be described in detail with reference to the embodiments below in order to explain the technical contents, structural features, and objects and effects of the invention in detail.

Referring to fig. 1, the present invention provides a leather rear cover 100, which includes a substrate layer 10, a reinforcing layer 30 disposed on a surface of the substrate layer 10, and an organic silicone leather layer 50 disposed on a surface of the reinforcing layer 30, wherein the substrate layer 10 is selected from a PC board or a PMMA/PC composite board, and the reinforcing layer 30 is selected from one of glass fiber, carbon fiber, aramid fiber, or a glass fiber/carbon fiber composite material. It is to be understood that the leather-like rear cover 100 product may be an electronic rear cover, including but not limited to a mobile phone rear cover, a tablet computer rear cover, a notebook computer rear cover, etc.

In the technical scheme, the organosilicon leather layer 50 on the surface can provide high-end hand feeling and texture, the reinforcing layer 30 is selected from one of glass fibers, carbon fibers or glass fiber/carbon fiber composite materials, so that the thickness of the rear cover can be reduced, enough strength can be provided, the base material layer 10 is selected from a PC board or a PMMA/PC composite board, and a mobile phone signal cannot be influenced, so that the hand feeling or texture experience of a consumer is met, and the light and thin requirements are met.

With continued reference to fig. 1, in a preferred embodiment, the silicone leather layer 50 includes a skin layer 51, an intermediate layer 53 and an adhesive layer 55, wherein the intermediate layer 53 is disposed between the skin layer 51 and the adhesive layer 55, and the adhesive bonding between the intermediate layer 53 and the reinforcing layer 30 is achieved by the adhesive layer 55. That is, the silicone leather layer 50 is a composite layer composed of the skin layer 51, the intermediate layer 53 and the adhesive layer 55, wherein the skin layer 51 is a transparent layer and is mainly used for forming leather textures, which can provide texture and surface physical and mechanical properties, and the texture structure can be formed by arranging texture paper or texture film on the surface of the skin layer 51, so that the texture layer 70 is formed on the surface of the skin layer 51, thereby improving the experience of the product, and the specific texture structure can be set according to the needs; the middle layer 53 is used as a main supporting structure, so that the strength of the rear cover is improved, and meanwhile, colors can be added into the middle layer 53 to achieve the gorgeous effect of the product; the adhesive layer 55 has tackiness and can adhere the intermediate layer 53 and the reinforcing layer 30.

In a preferred embodiment, the thickness of the skin layer 51 is 20-50 μm, preferably 30-50 μm, such as but not limited to 20 μm, 24 μm, 28 μm, 32 μm, 34 μm, 36 μm, 38 μm, 40 μm, 42 μm, 44 μm, 46 μm, 48 μm, 50 μm; the thickness of the intermediate layer 53 is 50-250 μm, preferably 100-150 μm, for example, the thickness of the intermediate layer 53 may be, but is not limited to, 50 μm, 80 μm, 110 μm, 140 μm, 170 μm, 200 μm, 220 μm, 240 μm, 250 μm; the thickness of the adhesive layer 55 is 50-100 μm, for example, the thickness of the adhesive layer 55 can be, but is not limited to, 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm.

In a preferred embodiment, the substrate layer 10 is selected from a PMMA/PC composite board, the PMMA/PC composite board is a composite board prepared by co-extruding PC and PMMA, the hardened PMMA layer can reach a pencil hardness of more than 4H, so as to ensure the scratch resistance of the product, and the PC layer can ensure sufficient toughness and ensure the overall impact strength. Further, the thickness of the substrate layer 10 is 0.3-0.5mm, for example, the thickness of the substrate layer 10 can be, but is not limited to, 0.3mm, 0.32mm, 0.34mm, 0.36mm, 0.38mm, 0.4mm, 0.42mm, 0.44mm, 0.46mm, 0.48mm, 0.5mm.

In a preferred embodiment, the reinforcing layer 30 is selected from fiberglass cloth, carbon fiber cloth, aramid fiber cloth, or fiberglass/carbon fiber composite cloth. Further, the thickness of the reinforcing layer 30 is 0.1 to 0.2mm, for example, the thickness of the reinforcing layer 30 may be, but is not limited to, 0.1mm, 0.12mm, 0.14mm, 0.16mm, 0.18mm, 0.2mm.

In a preferred embodiment, the skin layer 51 is prepared from 100 parts by weight of vinyl dimethicone, 5-25 parts by weight fumed silica, 40-70 parts by weight of a methacryloyloxy MQ resin, 10-30 parts by weight of a crosslinking agent, 0.1-5 parts by weight of an inhibitor, and 0.2-5 parts by weight of a platinum catalyst. More preferably, the degree of polymerization of the vinyl polydimethylsiloxane is from 1500 to 2000; the filler is selected from fumed silica, especially fumed silica chemically modified at surface, such as vinyl, trialkylsiloxy; the catalyst adopts a platinum catalyst; the inhibitor is an unsaturated organic compound, including but not limited to maleic anhydride, fumaric anhydride, acetylene compounds, amine oxide, phosphine, phosphite ester, sulfoxide, nitrogen, phosphorus and sulfur compounds, and the like, specifically, the nitrogen, phosphorus and sulfur compounds include but not limited to azodicarbonyl, triazolinedione derivatives, and the like; acetylenic compounds include, but are not limited to, butynedioic acid ester, 3-methyl-1-butyn-3-ol, 1-ethynylcyclohexanol, 3-phenyl-1-butyn-3-ol, 3, 5-propyl-1-octyn-3-ol, and the like; the cross-linking agent is hydrogen-containing silicone oil, preferably hydrogen-containing silicone oil containing at least three hydrosilation groups or more.

In a preferred embodiment, the intermediate layer 53 is prepared from 100 parts by weight of vinyl polydimethylsiloxane, 25 to 50 parts by weight of fumed silica, 15 to 40 parts by weight of methacryloyloxy MQ resin, 10 to 30 parts by weight of a crosslinking agent, 0.1 to 5 parts by weight of an inhibitor, and 0.2 to 5 parts by weight of a platinum catalyst. More preferably, the intermediate layer 53 is prepared from raw materials including 100 parts of vinyl polydimethylsiloxane, 30-50 parts of fumed silica, 15-35 parts of methacryloyloxy MQ resin, 10-30 parts of a crosslinking agent, 0.1-5 parts of an inhibitor, and 0.2-5 parts of a platinum catalyst. Further, the degree of polymerization of the vinyl polydimethylsiloxane is 1500 to 2000; the filler is selected from fumed silica, especially fumed silica chemically modified at surface, such as vinyl, trialkylsiloxy; the catalyst adopts a platinum catalyst; the inhibitor is an unsaturated organic compound, including but not limited to maleic anhydride, fumaric anhydride, acetylene compounds, amine oxide, phosphine, phosphite ester, sulfoxide, nitrogen, phosphorus and sulfur compounds, and the like, specifically, the nitrogen, phosphorus and sulfur compounds include but not limited to azodicarbonyl, triazolinedione derivatives, and the like; acetylenic compounds include, but are not limited to, butynedioic acid ester, 3-methyl-1-butyn-3-ol, 1-ethynylcyclohexanol, 3-phenyl-1-butyn-3-ol, 3, 5-propyl-1-octyn-3-ol, and the like; the cross-linking agent is hydrogen-containing silicone oil, preferably hydrogen-containing silicone oil containing at least three hydrosilation groups or more. Among them, the employment of the methacryloyloxy MQ resin in the skin layer 51 and the intermediate layer 53 can improve the tensile strength and tear strength of the silicone leather layer 50.

In a preferred embodiment, the adhesive layer 55 is prepared from 100 parts by weight of vinyl polydimethylsiloxane, 25-50 parts by weight of fumed silica, 15-40 parts by weight of methacryloyloxy MQ resin, 10-30 parts by weight of a crosslinking agent, 0.1-5 parts by weight of an inhibitor, and 0.2-5 parts by weight of a platinum catalyst. More preferably, the degree of polymerization of the vinyl polydimethylsiloxane is from 1500 to 2000; the filler is selected from fumed silica, especially fumed silica subjected to surface chemical modification treatment, such as vinyl groups and trialkylsiloxy groups; the catalyst adopts a platinum catalyst; the inhibitor is an unsaturated organic compound, including but not limited to maleic anhydride, fumaric anhydride, acetylene compounds, amine oxide, phosphine, phosphite ester, sulfoxide, nitrogen, phosphorus and sulfur compounds, and the like, specifically, the nitrogen, phosphorus and sulfur compounds include but not limited to azodicarbonyl, triazolinedione derivatives, and the like; acetylenic compounds include, but are not limited to, butynedioic acid ester, 3-methyl-1-butyn-3-ol, 1-ethynylcyclohexanol, 3-phenyl-1-butyn-3-ol, 3, 5-propyl-1-octyn-3-ol, and the like; the cross-linking agent is hydrogen-containing silicone oil, preferably hydrogen-containing silicone oil containing at least three hydrosilation groups or more.

The following examples illustrate the process for the preparation of the leather-like back cover according to the invention, without thereby limiting the scope of protection of the invention.

Example 1

A method for preparing a leather rear cover comprises the following steps:

(1) Preparation of a Silicone leather layer

1.1 preparation of the skin layer: according to the weight percentage, 100 parts of vinyl polydimethylsiloxane, 15 parts of fumed silica and 45 parts of methacrylic acyloxy MQ resin are uniformly stirred and dispersed, then 10 parts of cross-linking agent and 1 part of maleic anhydride are added, the mixture is uniformly stirred, finally 0.5 part of platinum catalyst is added, the mixture is uniformly stirred and dispersed, the material is coated on the surface of release texture paper, the thickness is 30 micrometers, baking is carried out, the temperature is 140 ℃, the time is 5 minutes, a skin layer is obtained, and a texture layer is formed on the surface of the skin layer;

1.2 preparation of the interlayer: according to the weight percentage, after 100 parts of vinyl polydimethylsiloxane, 35 parts of fumed silica and 20 parts of methacrylic acyloxy MQ resin are uniformly stirred and dispersed, 15 parts of cross-linking agent and 0.5 part of maleic anhydride are added and uniformly stirred, finally 0.5 part of platinum catalyst is added and uniformly stirred, the material is coated on the surface of a surface layer, the thickness is 150 microns, and the material is baked at the temperature of 140 ℃ for 5min to obtain an intermediate layer;

1.3 preparation of the adhesive layer: the preparation raw materials of the bonding layer are the same as those of the intermediate layer, the bonding layer material is coated on the surface of the intermediate layer, the thickness is 60mm, the other surface of the bonding layer is attached with 0.1mm glass fiber cloth, baking is carried out at the temperature of 140 ℃ for 5min, so that the glass fiber cloth and the intermediate layer are connected and fixed through the bonding layer, a semi-finished product of a composite layer formed by the reinforcing layer and the organic silicon leather layer is obtained,

(2) Providing a PMMA/PC composite board with the thickness of 0.4mm, coating UV glue on the surface of the PMMA/PC composite board, attaching the PMMA/PC composite board with the glass fiber cloth, and then carrying out photocuring on the UV glue to bond the glass fiber cloth on the PMMA/PC composite board;

(3) And (4) carrying out high-pressure forming on the semi-finished product, and punching out the shape of the product, thereby obtaining the product.

Example 2

A method for preparing a leather rear cover comprises the following steps:

(1) Preparation of a Silicone leather layer

1.1 preparation of the skin layer: according to the weight percentage, 100 parts of vinyl polydimethylsiloxane, 10 parts of fumed silica and 50 parts of methacrylic acyloxy MQ resin are uniformly stirred and dispersed, then 10 parts of cross-linking agent and 1 part of maleic anhydride are added, the mixture is uniformly stirred, finally 0.5 part of platinum catalyst is added, the mixture is uniformly stirred and dispersed, the material is coated on the surface of release texture paper, the thickness is 40 micrometers, baking is carried out, the temperature is 140 ℃, the time is 5 minutes, a skin layer is obtained, and a texture layer is formed on the surface of the skin layer;

1.2 preparation of the interlayer: according to the weight percentage, after 100 parts of vinyl polydimethylsiloxane, 30 parts of fumed silica and 30 parts of methacrylic acyloxy MQ resin are uniformly stirred and dispersed, 15 parts of cross-linking agent and 0.5 part of maleic anhydride are added and uniformly stirred, finally 0.5 part of platinum catalyst is added and uniformly stirred, the material is coated on the surface of a surface layer, the thickness of the material is 200 micrometers, and the material is baked at the temperature of 140 ℃ for 5 minutes to obtain an intermediate layer;

1.3 preparation of the adhesive layer: the preparation raw materials of the bonding layer are the same as those of the intermediate layer, the bonding layer material is coated on the surface of the intermediate layer, the thickness of the bonding layer material is 80mm, carbon fiber cloth with the thickness of 0.2mm is attached to the other surface of the bonding layer, baking is carried out at the temperature of 140 ℃ for 5min, so that the carbon fiber cloth and the intermediate layer are connected and fixed through the bonding layer, a semi-finished product of a composite layer formed by the reinforcing layer and the organic silicon leather layer is obtained,

(2) Providing a PMMA/PC composite board with the thickness of 0.5mm, coating UV glue on the surface of the PMMA/PC composite board, attaching the PMMA/PC composite board with the carbon fiber cloth, and carrying out photocuring on the UV glue to bond the carbon fiber cloth on the PMMA/PC composite board;

(3) And (4) carrying out high-pressure forming on the semi-finished product, and punching out the shape of the product, thereby obtaining the product.

Example 3

A method for manufacturing a leather rear cover comprises the following steps:

(1) Preparation of a Silicone leather layer

1.1 preparation of the epidermal layer: according to the weight percentage, 100 parts of vinyl polydimethylsiloxane, 20 parts of fumed silica and 40 parts of methacrylic acyloxy MQ resin are uniformly stirred and dispersed, then 10 parts of cross-linking agent and 1 part of maleic anhydride are added and uniformly stirred, finally 0.5 part of platinum catalyst is added and uniformly stirred, the material is coated on the surface of release textured paper, the thickness of the material is 50 micrometers, the release textured paper is baked at the temperature of 140 ℃ for 5 minutes, a surface layer is obtained, and a textured layer is formed on the surface of the surface layer;

1.2 preparation of the interlayer: according to the weight percentage, after 100 parts of vinyl polydimethylsiloxane, 40 parts of fumed silica and 25 parts of methacrylic acyloxy MQ resin are uniformly stirred and dispersed, 15 parts of cross-linking agent and 0.5 part of maleic anhydride are added and uniformly stirred, finally 0.5 part of platinum catalyst is added and uniformly stirred, the material is coated on the surface of a surface layer, the thickness is 100 micrometers, baking is carried out, the temperature is 140 ℃, and the time is 5 minutes, so that an intermediate layer is obtained;

1.3 preparation of the adhesive layer: the preparation raw materials of the bonding layer are the same as those of the intermediate layer, the bonding layer material is coated on the surface of the intermediate layer, the thickness of the bonding layer material is 80mm, aramid fiber cloth with the thickness of 0.15mm is attached to the other surface of the bonding layer, baking is carried out at the temperature of 140 ℃ for 5min, so that the aramid fiber cloth and the intermediate layer are connected and fixed through the bonding layer, a semi-finished product of a composite layer formed by the reinforcing layer and the organic silicon leather layer is obtained,

(2) Providing a PMMA/PC composite board with the thickness of 0.3mm, coating UV glue on the surface of the PMMA/PC composite board, attaching the PMMA/PC composite board with the aramid fiber cloth, and carrying out photocuring on the UV glue to bond the aramid fiber cloth on the PMMA/PC composite board;

(3) And (4) carrying out high-pressure forming on the semi-finished product, and punching out the shape of the product, thereby obtaining the product.

The rear covers obtained in examples 1 to 3 were subjected to hardness and wear resistance tests, and the test results are shown in table 1.

Wherein the test items and conditions are as follows:

and (3) hardness testing: ASTM D3363 Standard, mitsubishi pencil and 1kg force.

And (3) testing the eraser: special rubber (7017R), weight 500g, rub back and forth on the surface of material, frequency is: 40-60 times/min, the frequency is 1 ten thousand times, and the judgment basis is as follows: the coating at the friction part can not fall off and the substrate can not be exposed.

Denim friction test: the weight is 1kg, the size of a friction head is 20 x 20mm, the leather is dry-ground for 10 ten thousand times, and the appearance of the leather is checked every 2 ten thousand times; the wet film is used for 1 ten thousand times, the appearance of the leather is checked every 1000 times, and the judgment basis is as follows: dry grinding: no abrasion problem for 10 ten thousand times, wet grinding: no abrasion and no obvious fading problem for 1 ten thousand times.

TABLE 1 hardness and abrasion resistance test results

As can be seen from the data in table 1, the leather-like rear covers obtained in examples 1 to 3 have more desirable hardness and wear resistance. The leather type rear cover is prepared by compounding three materials, namely an organic silicon leather layer, a reinforcing layer (glass fiber, carbon fiber or glass fiber/carbon fiber composite material) and a base material layer (a PC board or PMMA/PC composite board), and then performing a high-pressure forming process, and the leather type rear cover has the advantages that the surface is the organic silicon leather layer, high-end hand feeling and texture can be provided, one of the glass fiber, the carbon fiber or the glass fiber/carbon fiber composite material can be arranged inside the rear cover, enough strength can be provided, the thickness of the rear cover can be reduced, the base material layer is selected from the PC board or the PMMA/PC composite board, the hardness and the strength are excellent, mobile phone signals cannot be influenced, the hand feeling or the texture experience of a consumer is met, the light and thin requirements are met, mass production can be realized by adopting a high-pressure forming and CNC (computer numerical control) processing process, the production efficiency is improved, and the cost of the rear cover is greatly reduced.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, therefore, the present invention is not limited by the appended claims.

Claims (10)

1. The leather rear cover is characterized by comprising a base material layer, a reinforcing layer arranged on the surface of the base material layer and an organic silicon leather layer arranged on the surface of the reinforcing layer, wherein the base material layer is selected from a PC (polycarbonate) plate or a PMMA (polymethyl methacrylate)/PC composite plate, and the reinforcing layer is selected from one of glass fibers, carbon fibers, aramid fibers or glass fiber/carbon fiber composite materials.

2. The leather-like rear cover as set forth in claim 1, wherein said reinforcing layer has a thickness of 0.1 to 0.2mm.

3. The leather-like rear cover according to claim 1, wherein the thickness of the base material layer is 0.3 to 0.5mm.

4. The leather-like rear cover according to claim 1, wherein said silicone leather layer comprises a skin layer, an intermediate layer and an adhesive layer, said intermediate layer being located between said skin layer and said adhesive layer, and said intermediate layer and said reinforcing layer are adhesively fixed by means of said adhesive layer.

5. The leather-like rear cover as set forth in claim 4, wherein said surface of said skin layer is provided with a texture layer.

6. The leather-like rear cover according to claim 4, wherein the skin layer has a thickness of 30 to 50 μm; the thickness of the intermediate layer is 100-250 μm; the thickness of the bonding layer is 50-100 μm.

7. The leather-like rear cover according to claim 4, wherein the skin layer is prepared from 100 parts by weight of vinyl polydimethylsiloxane, 5 to 25 parts by weight of fumed silica, 40 to 70 parts by weight of methacrylic acyloxy MQ resin, 10 to 30 parts by weight of crosslinking agent, 0.1 to 5 parts by weight of inhibitor, and 0.2 to 5 parts by weight of platinum catalyst.

8. The leather-like rear cover according to claim 4, wherein the intermediate layer is prepared from 100 parts by weight of vinyl polydimethylsiloxane, 25 to 50 parts by weight of fumed silica, 15 to 40 parts by weight of methacrylic acyloxy MQ resin, 10 to 30 parts by weight of a crosslinking agent, 0.1 to 5 parts by weight of an inhibitor, and 0.2 to 5 parts by weight of a platinum catalyst.

9. The leather-like rear cover according to claim 4, wherein the raw material for preparing said adhesive layer comprises, in weight percent, 100 parts of vinyl polydimethylsiloxane, 25-50 parts of fumed silica, 15-40 parts of methacrylic acyloxy MQ resin, 10-30 parts of crosslinking agent, 0.1-5 parts of inhibitor and 0.2-5 parts of platinum catalyst.

10. A method for manufacturing a leather type rear cover as claimed in any one of claims 1 to 9, comprising the steps of:

(1) Bonding and fixing the organic silicon leather layer and the reinforcing layer;

(2) And providing a substrate layer, coating UV glue on the surface of the substrate layer, attaching the reinforcing layer on the UV glue and carrying out photocuring, so that the reinforcing layer is bonded with the substrate layer.

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