CN102218863A - External surface film of plastic thin shell composite body and application method thereof - Google Patents

Abstract

The invention relates to an exterior film of a plastic thin shell composite and an application method thereof, wherein the exterior film sequentially comprises the following components from outside to inside: an outer coating layer with a thickness of about 0.2-0.6 mm; a middle adsorption heat insulation layer with the thickness of about 0.2-0.5 mm; and an inner adhesive layer having a thickness of about 40-60 μm; the layers are sequentially stacked and pressed to form a film; when in application, the outer surface film is flatly arranged in a mold cavity of an injection molding mold, and a plastic thin shell is formed on the inner adhesive layer of the outer surface film to form a composite body with the outer surface film and the plastic thin shell; the plastic thin shell piece can be integrated with the inner adhesive layer through hot melting by virtue of the injection pressure and temperature of an injected material during injection molding, and meanwhile, part of the thickness of the inner adhesive layer, namely 4-12 mu m, is forced to permeate into existing pores in the middle adsorption heat insulation layer. Therefore, the bonding strength and the adherence between the outer film and the plastic thin shell can be improved, and the purposes of improving the quality and simplifying the manufacturing process are achieved.

Description

Outer film of plastic thin shell composite body and its application method

technical field

The invention relates to an outer film of a plastic thin shell composite and its application method, in particular to a plastic film that can be placed in a molding mold for injection molding on the outer film. Plastic thin shell parts to form a composite body with an outer film and plastic thin shell parts with good adhesion, which can be used as the shell of various products.

Background technique

There are various electronic products on the market, here we take electronic products as an example to illustrate but not limit, including but not limited to common computer (computer) products such as notebook computers (NB), communication products such as mobile phones or consumer products and other 3C products, often A thin shell is used as the outer shell of the product; the thin shell has different structures according to the design requirements of the product, and in terms of the material used for the thin shell base (base) of the outer shell, it can be roughly divided into It is the two main structural categories of plastic thin shell parts and metal thin shell parts.

Plastic thin shell parts with external decorative surfaces are generally made by using an in-mold decorating process (IMD for short), which is a substrate formed into a three-dimensional shape and printed with a pattern. For example, plastic film, hereinafter referred to as IMD film (IMD film), is embedded in a molding mold, and then plastic injection molding technology is used to inject hot melt resin on the back of the IMD film to form the shell. The matrix, hereinafter referred to as the resin base (resin base), makes the resin base and the IMD film combine to form an integral plastic thin shell, wherein the IMD film (IMD film) can be fixed and combined on the resin base (resin base) to form a permanent device on the outer surface of the plastic shell for an outer decorative surface or a protective surface or both; and the IMD film can also be temporarily The fixing method is set on the outer surface of the resin base (resin base) to form a temporary device. After completion, the IMD film can be torn off, and the printed pattern on the IMD film can be transferred or retained The outer surface of the resin matrix serves as an outer decorative surface of the plastic thin shell.

Aiming at the structural design and manufacturing method of the above-mentioned plastic thin shell parts, there are currently many existing technologies, including:

US3,654,062 discloses a related technology of a molded decorative plaque with a laminated facing sheet, which injects hot melt plastic into a laminated facing sheet that already has a mold structure. Formed on the back of the surface sheet. US 6,117,384 discloses a technology related to the process of using a multi-colored film, and then injecting hot melt resin on the back of the film to form a permanently combined three-dimensional object. US4,391,954 discloses a related technology of a thermoplastic molding composition comprising an aromatic carbonate polymer and a polyester obtained from cyclohexanedimethanol . US4,125,572 discloses a thermoplastic molding compound comprising an aromatic carbonate polymer (aromatic carbonate polymer) and a polyester (polyester) obtained from an aliphatic or cycloaliphatic diol ( Thermoplastic molding composition) related technologies. US6,465,102 discloses an article comprising a decorative surface area and an integrally formed polymeric base (polymeric base) and its molding method, and said polymeric base comprises a transparent cycloaliphatic polyester resin (cycloaliphaticpolyester resin ), wherein the cycloaliphatic polyester resin is related technology (An article comprising a decorative surface area and an integral formed polymeric base comprising transparent cycloaliphatic polyester resin, wherein the cycloaliphatic polyester resin is not interfered by aromatic moiety) free from an aromatic moisture and the method of molding t

However, when the plastic film (i.e. the IMD film) of a composite body, hereinafter referred to as the outer film, and/or its resin base (resin base), hereinafter referred to as the plastic thin shell, are respectively specialized and limited, not only The materials used are limited, and the application of the outer membrane and/or the plastic thin shell is relatively limited, which is not conducive to the application of the composite body with the outer membrane and the plastic thin shell, for example, for diversification When it is necessary to choose materials including but not limited to cloth surface, leather surface, resin fiber surface, etc. as the outer film, it is often impossible to use the same technology or equipment to achieve high production efficiency, mass production and good quality control. Efficacy is relatively unable to improve the use efficiency and application range of the composite body, that is, the plastic shell, and thus can be regarded as a shortcoming of the above-mentioned composite body.

It can be seen from the above that the application of the existing plastic thin shell composite body with an outer film does have some shortcomings and problems. Efficient solutions are proposed to overcome the shortcomings of the prior art.

Contents of the invention

The purpose of the present invention is to provide an outer membrane of a plastic thin shell composite and an application method thereof, so as to improve the bonding strength and adhesion between the outer membrane and the plastic thin shell, so as to improve the Composite molding quality and range of applications.

In order to achieve the above object, the technical scheme adopted in the present invention comprises:

An outer film of a composite of plastic thin shell parts, characterized in that it is placed into a mold cavity of a plastic injection molding mold to make a plastic thin shell that has an outer film and a plastic thin shell part and is combined into one A component composite, the outer membrane sequentially includes an outer decoration layer, an intermediate adsorption heat insulation layer and an inner adhesive layer from the outside to the inside, and each layer is stacked and pressed in sequence to form a film, wherein:

The outer decoration layer is a cloth layer made of natural or artificial fibers, or a leather layer made of synthetic leather, or a carbon fiber layer made of carbon fibers, or a glass fiber layer made of glass fibers, the thickness About 0.2-0.6mm;

The middle adsorption heat insulation layer is made of polyester fiber (Tetoron), nylon (Nylon) or blended materials, with a thickness of about 0.2-0.5mm;

The inner adhesive layer is a thermoplastic rubber film synthesized by styrene-butadiene block copolymer and hydrocarbon petroleum resin, with a thickness of about 40-60 μm;

During application, the outer film is arranged in a mold cavity of an injection molding mold, and then a plastic thin shell is injection-molded on the inner adhesive layer of the outer film to make a plastic thin shell with an outer film and a plastic thin shell. Plastic thin shell composites of shells;

The plastic thin shell is thermally bonded with the inner adhesive layer by virtue of the injection pressure and temperature of the injection material during injection molding, and at the same time forces part of the thickness of the inner adhesive layer to penetrate into the In the middle adsorption heat insulation layer to disperse the injection pressure and temperature of the discharged material, so that the plastic thin shell and the outer film are combined to form an integrated plastic thin shell by virtue of the inner adhesive layer Shell complex.

Wherein: the middle adsorption heat insulation layer is one of the forms of woven fabric, non-woven fabric, foam layer or superfiber layer.

Wherein: the middle adsorption heat insulation layer is bonded into one body with the outer decoration layer.

Wherein: the inner adhesive layer is bonded on the inner surface of the middle adsorption heat insulation layer by means of roller heat pressing.

Wherein: the partial thickness of the adhesive layer refers to the thickness of 10-20% of the adhesive layer, that is, 4-12 μm.

Wherein: the outer decoration layer is a cloth layer made of natural fibers, the natural fibers are cotton or hemp of plant fibers, or wool or silk of animal fibers.

Wherein: the outer decoration layer is a fabric layer made of artificial fibers, such as nylon, polyester fibers, acrylic fibers or blended materials.

Wherein: the outer decoration layer is a synthetic leather layer composed of PU (polyurethane), PVC (polyvinyl chloride) or PU and PVC synthetic leather.

Wherein: the injection material of the plastic thin shell is one of the following groups: ABS (acrylonitrile-styrene-butadiene resin), PC (polycarbonate), acrylic resin (acrylic resin) ) and nylon (polyamide resin).

Wherein: when the outer film is placed in the mold cavity, the boundary line of the outer film is beyond the boundary line of the molding cavity of the plastic thin shell.

Wherein: the plastic thin shell part forms a burr after injection molding, and the burr is formed by a peripheral boundary line of the mold cavity exceeding the peripheral boundary line of the plastic thin shell part and forming a ring periphery and A thinner overflow area is formed.

In order to achieve the above object, the technical scheme adopted in the present invention comprises:

A method for applying the outer film of a plastic thin shell composite body, characterized in that: supplying a method for manufacturing a plastic thin shell composite body that has an outer membrane and a plastic thin shell and is combined into one, Contains the following steps:

An outer film is provided, and the outer film is the outer film according to any one of claims 1 to 10, which comprises an outer decorative layer, an intermediate adsorption heat insulation layer and an inner adhesive layer;

According to the plastic injection molding process, an injection molding mold for a plastic thin shell is provided, and the outer film is flattened and fixed in the mold cavity of the injection molding mold;

Then utilize the plastic injection molding process to injection mold a plastic thin shell on the inner adhesive layer of the outer film; wherein the plastic thin shell can rely on the injection pressure and temperature of the injection material during injection molding to It is integrated with the inner adhesive layer by heat fusion, and at the same time, part of the thickness of the inner adhesive layer is forced to penetrate into the middle adsorption heat insulation layer, so that the injection-molded plastic thin shell and the outer film By virtue of the inner adhesive layer, it is combined into a plastic thin shell composite body;

After cooling and shaping, take out the injection-molded plastic thin shell composite from the injection molding mold, wherein the outer edge of the peripheral boundary of the plastic thin shell forms a burr;

Carry out the burr removal operation, cut off the burr from the peripheral boundary of the plastic thin shell part, and complete a plastic thin shell part composite.

Wherein: when the outer membrane is placed into the mold cavity, the peripheral boundary of the outer membrane is beyond the peripheral boundary of the mold cavity.

Wherein: the burr is formed by a thin overflow area formed by the boundary line of the periphery of the mold cavity exceeding the boundary line of the plastic thin shell.

Compared with the prior art, the present invention adopting the above technical solution has the advantage that it can improve the bonding strength and adhesion between the outer film and the plastic thin shell, so as to achieve the purpose of improving quality and simplifying the manufacturing process .

Description of drawings

Fig. 1 is the structural representation of the outer membrane of the plastic thin shell composite body of the present invention;

Fig. 2 is the front perspective schematic diagram of an embodiment of the plastic thin shell composite formed by applying the outer film of the present invention;

Fig. 3 is a rear perspective schematic diagram of the embodiment of Fig. 2;

Fig. 4 is a schematic cross-sectional view of the embodiment shown in Figs. 2 and 3;

Fig. 5 is a schematic cross-sectional view of an injection molding mold in which the outer film of the present invention is applied to a plastic thin shell composite;

Fig. 6 is a partially enlarged schematic diagram of the section of the injection molding mold of Fig. 5, wherein the injection material of the plastic thin shell part is fixed on the outer film by injection molding;

Fig. 7 is a schematic side view of three elastic pressure columns as positioning points on the injection molding machine in Fig. 5;

Fig. 8 is a schematic diagram of the molding process of applying the outer film of the present invention to a plastic thin shell composite.

Explanation of reference signs: plastic thin shell component complex 1; outer film 10; outer decoration layer 11; protective film 111; middle adsorption and heat insulation layer 12; inner adhesive layer 13; peripheral boundary line 15; Injection material 20 a ; peripheral border 21 ; flange 22 ; inner surface 23 ; joint 24 ; molding die 3 ; mold cavity 31 ; peripheral border 32 ; overflow area 33 ; elastic pressure column 34 .

Detailed ways

Referring to Fig. 1, the outer film 10 of the plastic thin shell composite body of the present invention comprises: an outer decorative layer 11 is arranged on the outside for outward display; an intermediate adsorption heat insulation layer 12 is arranged between the outer decorative layer 11 and the inner adhesive layer 13 and can be bonded together with the exterior decoration layer 11; and an inner adhesive layer 13 is provided on the inner surface for a plastic thin shell to be molded on its surface; and the exterior decoration layer 11, the middle adsorption heat insulation layer 12 and the inner adhesive layer 13 are stacked and pressed sequentially to form a film.

The outer decoration layer 11 can be one of the following groups: a cloth layer, which is made of natural fibers such as cotton of plant fibers, hemp or animal fibers, silk, or made of man-made fibers such as nylon, polyester Fiber, acrylic fiber or blended; a synthetic leather layer, which is composed of PU (polyurethane, Polyurethane), PVC (polyvinyl chloride) or PU and PVC synthetic leather; a carbon fiber layer, which is composed of carbon fiber (carbon fiber) or a glass fiber layer, which is made of glass fiber (glass fiber); the thickness of the exterior decoration layer 11 is about 0.2-0.6mm.

The middle adsorption heat insulation layer 12 is made of polyester fiber (Tetoron), nylon (Nylon) or blended materials, with a thickness of about 0.2-0.5mm; As far as the material is concerned, its heat resistance is not high, and it is far lower than the heat resistance of PET as the plastic film (i.e. IMD film) in the prior art; Type, non-woven fabric type, foam layer type or superfiber layer type, etc., and it is better to have high density, but the structure still has fine pores.

The inner adhesive layer 13 is a thermoplastic rubber film synthesized by styrene-butadiene block copolymer and hydrocarbon petroleum resin, with a thickness of about 40-60 μm.

With reference to Fig. 8, the application method of the outer film 10 of the plastic thin shell composite body of the present invention is further described here, so as to illustrate the plastic thin shell composite body 1 made by applying the outer film 10 of the present invention and its molding Structural features of mold 3. Referring to FIGS. 2-4 , they are respectively the front view, rear perspective and cross-sectional schematic diagrams of an embodiment of the plastic thin shell composite 1 formed by applying the outer film 10 of the present invention. Referring to Figures 5-7, they are respectively a schematic cross-sectional view of an injection molding mold 3 where the outer film 10 of the present invention is applied to a plastic thin shell composite 1, a partially enlarged schematic diagram of the cross-section, and three elastic pressures on the injection molding mold machine table. Side view of a column as an anchor point.

Referring to Fig. 8, the method for applying the outer membrane 10 of the present invention to manufacture a plastic thin shell composite body 1 comprises the following steps:

An outer film 10 of the present invention is provided; said outer film 10 refers to a decorative film layer arranged on the outer surface of a plastic shell surface of a product, that is, the plastic thin shell composite in the present invention The outer film 10 provided on the outer surface of 1; said products include products with shells such as electronic products, lighting decorations, building materials, etc., wherein electronic products further include: computer products such as notebook computers (NB), communication products such as mobile phones or 3C products such as consumer products, but not limited, are illustrated here by taking a plastic shell-type shell of a notebook computer, that is, a plastic shell complex 1 as shown in Figures 2, 3, and 4; The outer film 10 includes an outer decoration layer 11, an intermediate adsorption heat insulation layer 12, and an inner adhesive layer 13 from the outside to the inside. The thermal layer 12 can be glued together with the outer decoration layer 11, that is, glued together with a thin layer of glue, and then the outer decoration layer 11, the middle adsorption heat insulation layer 12 and an inner adhesive layer 13 Laminated and pressed together to form a thin film; and the outer surface of the outer film 10, that is, the outer surface of the outer decoration layer 11, can be processed to have a layer of transparent protective film 111 to protect the outer surface. Decorative layer 11, and can change its external decorative pattern, luster or tactile feeling, to increase the diverse variation of described outer decorative layer 11; During implementation, described outer film 10 also can form a strip shape with equal width The outer film 10 is rolled into a roll, which can be transported to the working table of the working machine with the guidance of the conveying device, and then cut into a unit piece for subsequent operations;

According to the plastic injection molding process, an injection molding mold 3 of a plastic thin shell part 20 is provided, and the outer film 10 is flattened and fixed in the mold cavity 31 of the injection molding mold 3 as shown in Figures 5 and 6 ; The injection molding mold 3 is designed according to the relevant technology of the plastic injection molding process, and its structural type such as the position of the filling port, the design arrangement of the injection material flow channel, etc. does not need to be particularly limited; when the outer film 10 is fixed on the mold After the cavity 31 is inside, its peripheral boundary line 15 is beyond the peripheral boundary line 32 of the mold cavity 31 . Furthermore, the peripheral boundary 32 of the mold cavity 31 is designed to exceed the molding peripheral boundary (or peripheral end surface) 21 of the plastic thin shell part 20, and form a ring peripheral and relatively thin overflow area 33, That is to say, a drop is formed at the junction of the overflow area 33 and the peripheral boundary line 21 of the plastic thin shell part 20 as shown in FIG. 6 . In addition, several elastic pressure columns 34 can be set outside the periphery of the mold cavity 31 for use as positioning points, as shown in Figure 7. The number of the elastic pressure columns 34 is not limited. support the elastic pressure column 34; and rely on the fixed-point clamping effect of the several elastic pressure columns 34 to elastically stretch the outer edge part of the outer membrane 10, so that the outer membrane 10 is placed between the male and female molds 30a, 30b can still maintain a flat state when closed without wrinkles;

Utilize the plastic injection molding process again, on the inner surface of described outer film 10, i.e. the inner adhesive layer 13, injection molding a plastic shell part 20; The injection pressure and temperature of the material 20a are integrated with the thermal fusion of the inner adhesive layer 13, and at the same time, part of the thickness (about 10-20% of the inner adhesive layer 13 (about 40-60 μm in thickness), That is, 4-12 μm), it must penetrate into the existing pores in the intermediate adsorption heat insulation layer 12 to effectively disperse the injection pressure and temperature of the injection material 20a, that is, the intermediate adsorption heat insulation The layer 12 can absorb part of the thickness of the inner adhesive layer 13 by virtue of the existing pores of its structure, and can isolate the injection pressure and temperature of the injection material 20a by virtue of the appropriate density of its structure, so as to achieve component scattering of the output material 20a The function of injection pressure and temperature prevents the injection pressure and temperature of the injection material 20a from impinging on the exterior decoration layer 11 and destroying the integrity of the exterior decoration layer 11; The flow of the injection material 20a is used to force the outer film 10 to form a flattened state, so as to form a plastic thin shell composite 1 with good adhesion strength and quality; due to the peripheral boundary 32 of the mold cavity 31 It is beyond the peripheral boundary 21 of the plastic thin shell part 20 and forms a ring peripheral and relatively thin (has a drop) overflow area 33, so the overflow area 33 can be formed on the plastic thin shell part 20. The outer edge of the peripheral boundary 21 of the shell 20 extends to form a thinner flange 22 as shown in FIG. The thinner and integrally formed flange 22 can be used as the preset burr of the plastic thin shell 20 molded product, and can be removed in the follow-up burr removal operation; If it is desired to directly install electronic components such as circuit boards on the inner surface 23 of the injection-molded plastic shell part 20, it can be placed on the inner surface 23 when the plastic shell part 20 is injection-molded. Simultaneous injection molding of the required joint 24 is shown in Figures 3 and 4, so that the joint 24 is injection molded with the plastic shell 20 to form an integrated structure;

After cooling and finalizing, take out the injection molded plastic thin shell composite 1 from the injection mold 3;

Then carry out the burr removal operation, the flange 22 formed by the overflow area 33 of the mold cavity is cut off by the peripheral boundary line 21 of the plastic thin shell part 20, as shown in Figure 6, that is to complete a body with an outer film 10 And the plastic thin shell part composite 1 combined with the plastic thin shell part 20 is shown in Fig. 2-4.

The above-mentioned application method of using the outer film 10 of the present invention to make a plastic thin shell composite body 1, because part of the thickness of the inner adhesive layer 13 of the outer film 10 of the present invention can penetrate into the middle of the injection molding process. In the existing pores in the adsorption heat insulation layer 12, and at the same time, it is firmly melted and bonded together with the plastic thin shell part 20, so the outer membrane 10 described in the made plastic thin shell part composite 1 and The combination between the plastic shell parts 20 can maintain a fairly good adhesion. After the physical test, it has been proved that the outer film 10 has sufficient peel resistance, so the outer film 10 of the present invention can indeed improve the formed The structural strength of the integrated plastic thin shell composite body 1.

In the application method of the outer film 10 of the present invention, a ring peripheral and thinner (with a drop) overflow area 33 is specially designed on the outer edge of the peripheral boundary line 32 of the mold cavity 31. When injection molding, the injection The material 20a generally enters the mold cavity 31 from the central part of the mold cavity 31, that is, the pouring port is set at the central part of the mold cavity 31, and then flows radially around the peripheral boundary line 32 so as to flow more quickly. When reaching the peripheral boundary 32 of the mold cavity 31, when the injection material 20a flows from the central part toward the peripheral boundary 32, it can relatively press the outer film 10 provided at the peripheral boundary 32, that is, the flow of the injection material 20a The outer film 10 located at the peripheral boundary 32 can be driven to stretch outward, relatively producing a leveling effect from the inside to the outside, and extending to the overflow area 33, which is the peripheral boundary of the mold cavity 31 32. In this way, the outer film 10 of the injection-molded plastic shell 20 at the flange 22 at the outer edge can be more tightly and flattened, so when the flange 22 is cut off as a burr, the plastic shell can be improved. The quality of the outer surface of the peripheral edge of the finished product of piece complex 1.

By virtue of the design of the outer film 10 of the present invention, the entire film can be directly placed into the mold to perform the injection molding operation of the plastic shell part 20, and the outer film 10 can control the injection pressure of the injection material 20a and The temperature produces a dispersing effect to avoid damaging the integrity of the outer decoration layer 11 due to the injection pressure and temperature of the injection material 20a, so that the outer decoration layer 11 can be selected from a variety of different materials, for example: choose a cloth The layer can be made of natural fibers or artificial fibers, or a synthetic leather layer can be made of PU (polyurethane, Polyurethane), PVC (polyvinyl chloride) or PU and PVC synthetic leather, and can be made of a plastic injection molding process. The good-quality plastic thin shell composite 1 can achieve the purpose of simplifying the manufacturing process.

In the above-mentioned application of the outer film 10 of the present invention, the injection material 20a of the plastic shell 20 can be relatively selected from a variety of different plastics, such as: ABS (acrylonitrile-styrene-butadiene resin), PC (polycarbonate, Polycarbonate resin), Acrylic resin (acrylic resin/acrylic resin), Nylon (nylon/polyamide resin), etc.; and the pressure and temperature of the injection molding material 20a are respectively: The injection pressure of ABS is 80kg/mm ² and the injection temperature is 200°C; the injection pressure of PC is 120kg/mm ² and the injection temperature is 260°C; the injection pressure of Acrylic resin is 100kg/mm ² and the injection temperature is 240°C; and Nylon (nylon/polyamide Resin) with an injection pressure of 80kg/mm ² and an injection temperature of 260°C; wherein the plastic thin shell 20 can adhere to the inner surface of the outer film 10 by virtue of the injection pressure and temperature of the injection material 20a during injection molding The layer 13 is thermally melted and integrated, and at the same time forces the inner adhesive layer 13, with a thickness of about 40-60 μm, to penetrate into the middle adsorption insulation layer with a thickness of about 10-20%, that is, 4-12 μm. 12 in the existing pores.

In addition, the outer film 10 of the present invention can also be applied to the field of plastic extrusion molding, wherein the outer film 10 can be arranged in a mold cavity of an extrusion molding mold, and then formed on the outer surface by using the plastic extrusion molding process. A thin plastic shell is molded on the inner adhesive layer 13 of the film 10 to form a continuous integrated composite; since the plastic extrusion molding process is similar to the plastic injection molding process, it will not be repeated here.

The following application examples further illustrate the application method of the present invention and the effect that it can achieve:

Example 1

In the outer film 10 of the present embodiment, the outer decoration layer 11 is to select a leather layer which is made of PU (polyurethane, Polyurethane), PVC or PU and PVC synthetic leather, with a thickness of about 0.2-0.3mm, and the outer decoration Layer 11 is opaque and its outer surface is processed to form embossing; the middle adsorption heat insulation layer 12 is made of polyester fiber (Tetoron), nylon (Nylon) or blended materials, with a thickness of about 0.35-0.45mm, and this The middle adsorption heat insulation layer 12 of the embodiment is woven into a cloth surface type; the inner adhesive layer 13 is a thermoplastic rubber film synthesized by a styrene-butadiene block copolymer and hydrocarbon petroleum resin, with a thickness of about 40-50 μm (0.04-0.05mm); Described plastic shell part 20 is to select PC (Polycarbonate resin, polycarbonate) or ABS (acrylonitrile-styrene-butadiene resin) wherein a kind of is injection material 20a, Utilize plastic injection molding process to inject and mold on the inner surface of the outer film 10, that is, the inner adhesive layer 13, the thickness is about 2mm, and the length and width are 262mm×178mm; Simultaneous integral injection molding is provided with several bonding parts (24) whose height is 9.5 mm; it was found that the peel strength adhesion between the outer film 10 of the present embodiment and the plastic thin shell part 20 is 8 kg per square centimeter, Environmental test adhesion is from -40°C to 85°C and from 85°C to -40°C by raising or lowering the temperature by 1°C per minute and after 4 cycles, the outer film 10 and the plastic thin shell 20 are not peeled off, so it is proved The outer membrane 1 of the present invention can indeed improve the structural strength and adhesion of the integrated plastic thin shell composite 1 formed by the outer membrane 1 and the plastic thin shell 2 .

Example 2

In the outer film 10 of the present embodiment, the outer decoration layer 11 is to select a leather layer such as embodiment 1, which is made of PU (polyurethane, Polyurethane), PVC or PU and PVC synthetic leather, with a thickness of about 0.4-0.5mm , but the outer surface of the exterior decoration layer 11 of the present embodiment is transparent and forms a smooth surface, while its inner surface is processed to form embossing and is colored by electroplating; the middle adsorption heat insulation layer 12 is made of polyester fiber ( Tetoron), nylon (Nylon) or blended materials, the thickness is about 0.35-0.45mm, and the middle adsorption heat insulation layer 12 of the present embodiment is to be woven into the cloth surface pattern as embodiment 1; Described inner adhesive layer 13 is a thermoplastic rubber film synthesized by styrene-butadiene block copolymer and hydrocarbon petroleum resin, with a thickness of about 30-40 μm (0.03-0.04mm); the plastic thin shell 20 is selected from PC (Polycarbonate resin, poly Carbonate) or ABS (acrylonitrile-styrene-butadiene resin) is the injection material 20a, and the plastic injection molding process is used to inject and mold the inner surface of the outer film 10, that is, the inner adhesive layer 13, with a thickness of about It is 2mm, and its length and width are 262mm×178mm; the inner surface 23 of the plastic thin shell part 20 is provided with several joints (24) which are integrally injection molded at the same time, and its height is 9.5mm; The peel strength adhesion between the outer film 10 and the plastic thin shell 20 of the example is 8 kg per square centimeter, and the environmental test adhesion is from -40°C to 85°C and from 85°C to -40°C per minute heating or cooling 1°C and after 4 cycles, the outer membrane 10 and the plastic shell 20 are not peeled off, which proves that the outer membrane 10 of the present invention can indeed promote the formation of the outer membrane 10 and the plastic shell 20 The structural strength and adhesion of the integrated plastic thin shell composite body 1 .

Example 3

In the outer film 10 of the present embodiment, the outer decoration layer 11 is to select a leather layer which is made of PU (polyurethane, Polyurethane), PVC or PU and PVC synthetic leather, with a thickness of about 0.2-0.3mm, and the outer decoration Layer 11 is opaque and its outer surface is processed to form embossing; the middle adsorption heat insulation layer 12 is made of polyester fiber (Tetoron), nylon (Nylon) or blended materials, with a thickness of about 0.35-0.45mm, and this The middle adsorption insulation layer 12 of the embodiment is one of the forms of non-woven fabric, foam layer or superfiber layer; the inner adhesive layer 13 is made of styrene-butadiene block copolymer and hydrocarbon petroleum The synthetic thermoplastic rubber film of resin, thickness is about 40-50 μ m (0.04-0.05mm); Described plastic shell part 20 is to select ABS (acrylonitrile-styrene-butadiene resin) or PC (Polycarbonate resin, One of the polycarbonate) is the injection material 20a, which is injection-molded on the inner surface of the outer film 10, that is, the inner adhesive layer 13, with a thickness of about 2mm and a length and width of 262mm×178mm by using a plastic injection molding process; The inner surface 23 of the plastic thin shell 20 described above is provided with several joints 24 that are integrally injection molded at the same time, and the height of the joints 24 is 9.5 mm; The peel strength adhesion between the shells 2 is 8 kilograms per square centimeter, and the environmental test adhesion is from -40°C to 85°C and 85°C to -40°C by increasing or decreasing the temperature by 1°C per minute and after 4 cycles. The outer membrane 10 and the plastic thin shell part 20 are not peeled off, which proves that the outer membrane 10 of the present invention can really improve the integrated plastic thin shell composite body formed by the outer membrane 10 and the plastic thin shell part 20 1 structural strength and adhesion.

Example 4

In the outer film 10 of the present embodiment, the outer decorative layer 11 is to select a cloth layer for use with artificial fibers, such as nylon, polyester fiber, acrylic fiber or blended materials, with a thickness of 0.2-0.3mm; The above-mentioned intermediate adsorption and heat insulation layer 12 is made of polyester fiber (Tetoron), nylon (Nylon) or blended materials, with a thickness of about 0.35-0.45mm, and the intermediate adsorption and heat insulation layer 12 of this embodiment can form a woven fabric type state, non-woven fabric type, foam layer type or superfiber layer type, etc.; the inner adhesive layer 13 is a thermoplastic rubber film synthesized by styrene-butadiene block copolymer and hydrocarbon petroleum resin, with a thickness of About 40-50 μm (0.04-0.05mm); Described plastic shell part 20 is to select PC (Polycarbonate resin, polycarbonate) or ABS (acrylonitrile-styrene-butadiene resin) wherein one of them is The injection material 2a is injection-molded on the inner surface of the outer film 10, that is, the inner adhesive layer 13, with a thickness of about 2mm and a length and width of 262mm×178mm; The inner surface 23 is provided with several bonding parts 24 which are integrally injection molded at the same time, and the height of the bonding parts is 9.5 mm; it was found that the peel strength adhesion between the outer film 10 of this embodiment and the plastic thin shell part 20 is 8 kilograms per square centimeter, the environmental test adhesion is from -40°C to 85°C and 85°C to -40°C, and the temperature is raised or lowered by 1°C per minute and after 4 cycles, the outer film 1 and the plastic thin shell 20 does not peel off, thus proving that the outer membrane 10 of the present invention can indeed improve the structural strength and adhesion of the integrated plastic thin shell composite 1 formed by the outer membrane 10 and the plastic thin shell 20.

Example 5

In the outer film 10 of the present embodiment, the outer decoration layer 11 includes a cloth layer, a glue layer and a resin transparent outer covering layer, and the cloth layer is made of artificial fibers such as nylon, polyester fiber, acrylic Composed of fiber or blended materials with a thickness of about 0.2-0.3mm, the thickness of the glued layer is 0.04-0.06mm to make the cloth layer and the resin transparent outer covering glued together, and the resin transparent outer covering is Attached to the outer surface of the cloth layer, the thickness is about 0.1-0.2mm, so the thickness of the formed outer decoration layer 10 is about 0.34-0.56mm; the middle adsorption heat insulation layer 12 is made of polyester fiber ( Tetoron), nylon (Nylon) or blended materials, with a thickness of 0.35-0.45mm, and the middle adsorption heat insulation layer 12 of this embodiment can form a woven fabric pattern, a non-woven fabric pattern, a foam layer pattern or a superfiber layer One of the types, etc.; the inner adhesive layer 13 is a thermoplastic rubber film synthesized by styrene-butadiene block copolymer and hydrocarbon petroleum resin, with a thickness of about 40-50 μm (0.04-0.05mm); the plastic The thin shell part 20 is made of one of PC (Polycarbonate resin, polycarbonate) or ABS (acrylonitrile-styrene-butadiene resin) as the injection material 20a, and the plastic injection molding process is used to injection mold the outer film The inner surface of 10 is the inner adhesive layer 13, the thickness is about 2 mm, and the length and width are 262 mm × 178 mm; and the inner surface 23 of the plastic thin shell 20 is provided with several bonding parts that are integrally injected at the same time. The height is 9.5 mm; the results found that the peel strength adhesion between the outer film 10 of this embodiment and the plastic thin shell 20 is 8 kilograms per square centimeter, and the environmental test adhesion is from -40 ° C to 85 ° C and 85 ° C ℃ to -40 ℃, the temperature is raised or lowered by 1 ℃ per minute and after 4 cycles, the outer film 10 and the plastic thin shell part 20 are not peeled off, which proves that the outer film 10 of the present invention can indeed improve the outer film 10 and the plastic thin shell 20 form the structural strength and adhesion of the integrated plastic thin shell composite 1.

The above description is only illustrative of the present invention, rather than restrictive. Those of ordinary skill in the art understand that many modifications, changes or equivalents can be made without departing from the spirit and scope defined in the claims, but All will fall within the protection scope of the present invention.

Claims (14)

1. An outer film of a plastic thin shell composite body, characterized in that: it is for being inserted into a mold cavity of a plastic injection molding mold to make a plastic shell with an outer film and a plastic thin shell and combined into one. A thin shell composite, the outer membrane sequentially includes an outer decoration layer, an intermediate adsorption heat insulation layer and an inner adhesive layer from the outside to the inside, and each layer is stacked and pressed in sequence to form a film, wherein: The outer decoration layer is a cloth layer made of natural or artificial fibers, or a leather layer made of synthetic leather, or a carbon fiber layer made of carbon fibers, or a glass fiber layer made of glass fibers, the thickness About 0.2-0.6mm; The middle adsorption heat insulation layer is made of polyester fiber (Tetoron), nylon (Nylon) or blended materials, with a thickness of about 0.2-0.5mm; The inner adhesive layer is a thermoplastic rubber film synthesized by styrene-butadiene block copolymer and hydrocarbon petroleum resin, with a thickness of about 40-60 μm; During application, the outer film is arranged in a mold cavity of an injection molding mold, and then a plastic thin shell is injection-molded on the inner adhesive layer of the outer film to make a plastic thin shell with an outer film and a plastic thin shell. Plastic thin shell composites of shells; The plastic thin shell is thermally bonded with the inner adhesive layer by virtue of the injection pressure and temperature of the injection material during injection molding, and at the same time forces part of the thickness of the inner adhesive layer to penetrate into the In the middle adsorption heat insulation layer to disperse the injection pressure and temperature of the discharged material, so that the plastic thin shell and the outer film are combined to form an integrated plastic thin shell by virtue of the inner adhesive layer Shell complex. 2. The outer membrane of the plastic thin shell composite body according to claim 1, characterized in that: the middle adsorption and heat insulation layer is in the form of woven fabric, non-woven fabric, foam layer or super One of the types of fiber layers. 3 . The outer membrane of the plastic thin shell composite body according to claim 2 , wherein the middle adsorption heat insulation layer is bonded into one body with the outer decoration layer. 4 . 4. The outer membrane of the plastic thin shell composite body according to claim 1, characterized in that: the inner adhesive layer is hot-pressed and bonded to the middle adsorption and heat-insulating layer by means of roller hot pressing on the inner surface. 5. The outer membrane of the plastic thin shell composite body according to claim 1, characterized in that: the partial thickness of the adhesive layer refers to the thickness of 10-20% of the adhesive layer, i.e. 4- 12 μm. 6. The outer membrane of the plastic thin shell composite body according to claim 1, wherein the outer decorative layer is a cloth layer made of natural fibers, and the natural fibers are cotton or hemp of plant fibers , or wool or silk of animal fibers. 7. The outer membrane of the plastic thin shell composite body according to claim 1, characterized in that: the outer decoration layer is a cloth layer made of artificial fibers, and the artificial fibers are nylon, polyester fiber, Acrylic fiber or blended material. 8. The outer film of the plastic thin shell composite body according to claim 1, characterized in that: the outer decorative layer is a synthetic leather made of PU (polyurethane), PVC (polyvinyl chloride) or PU and PVC. Consists of layers of synthetic leather. 9. The outer film of the plastic thin shell composite body according to claim 1, characterized in that: the injection material of the plastic thin shell is one of the following groups: ABS (acrylonitrile-benzene Ethylene-butadiene resin), PC (polycarbonate), acrylic resin (acrylic resin), and nylon (polyamide resin). 10. The outer membrane of the plastic thin shell composite body according to claim 1, characterized in that: when the outer membrane is placed in the mold cavity, the boundary line of the outer membrane exceeds the boundary line of the plastic shell. The peripheral boundary of the molding cavity of the thin shell. 11. The outer film of the plastic thin shell component composite according to claim 1, characterized in that: the plastic thin shell component forms burrs after injection molding, and the burrs are produced by the mold The peripheral boundary of the hole exceeds the peripheral boundary of the plastic thin shell part to form a ring peripheral and a relatively thin overflow area. 12. An application method of the outer film of a plastic thin shell composite body, characterized in that: it is used to manufacture a plastic thin shell composite body that has an outer film and a plastic thin shell and is combined into one method, including the following steps: An outer film is provided, and the outer film is the outer film according to any one of claims 1 to 10, which comprises an outer decorative layer, an intermediate adsorption heat insulation layer and an inner adhesive layer; According to the plastic injection molding process, an injection molding mold for a plastic thin shell is provided, and the outer film is flattened and fixed in the mold cavity of the injection molding mold; Then utilize the plastic injection molding process to injection mold a plastic thin shell on the inner adhesive layer of the outer film; wherein the plastic thin shell can rely on the injection pressure and temperature of the injection material during injection molding to It is integrated with the inner adhesive layer by heat fusion, and at the same time, part of the thickness of the inner adhesive layer is forced to penetrate into the middle adsorption heat insulation layer, so that the injection-molded plastic thin shell and the outer film By virtue of the inner adhesive layer, it is combined into a plastic thin shell composite body; After cooling and shaping, take out the injection-molded plastic thin shell composite from the injection molding mold, wherein the outer edge of the peripheral boundary of the plastic thin shell forms a burr; Carry out the burr removal operation, cut off the burr from the peripheral boundary of the plastic thin shell part, and complete a plastic thin shell part composite. 13. The application method of the outer membrane of the plastic thin shell composite body according to claim 12, characterized in that: when the outer membrane is placed in the mold cavity, the boundary line of the outer membrane exceeds the mold cavity peripheral boundaries. 14. The application method of the outer film of the plastic thin shell composite body according to claim 12, characterized in that: the burrs are formed by the boundary line of the periphery of the mold cavity exceeding the plastic thin shell The peripheral boundary line forms a ring peripheral and is formed by a thinner overflow area.

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