Film for compounding polar material and non-polar material

Abstract

The utility model belongs to the field of composite films, and particularly relates to a film for compositing a polar material and a non-polar material, which comprises a first hot melt adhesive layer, a transition layer and a second hot melt adhesive layer from top to bottom, the first hot melt adhesive layer, the transition layer and the second hot melt adhesive layer are sequentially bonded and connected, and effective compositing between a metal material and an injection molding material is realized. And the requirements of automobile interiors or other application scenes are met.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of composite film, more particularly to a kind of thin film for polar material and nonpolar material composite. BACKGROUND

[0002] Aluminum alloy material and injection plastic are not sticky, so there needs to be a layer of medium between aluminum alloy and injection part to play the role of adhesion, and hot melt process is best. The material for bonding metal is usually nonpolar polyolefin (PE, EVA, EPDM, EAA, etc.) hot melt adhesive material. Injection material is usually polar material, such as PC, ABS, glass fiber, PVC, PA, TPU, glass, etc. or the above blended material, and TPU hot melt adhesive material can be hot melt bonded with these polar materials. Nonpolar material and polar material are incompatible, and currently no single-layer film can bond metal and PC, ABS, glass fiber, PVC, PA, TPU, glass, etc. or the above blended material. Therefore, it is of great practical significance to develop a thin film for polar material and nonpolar material composite to meet the needs of automotive interior or other application scenarios. SUMMARY

[0003] To solve the above problems, the utility model provides a kind of thin film for polar material and nonpolar material composite, realize the effective composite between metal material and injection material, meet the needs of automotive interior or other application scenarios.

[0004] A kind of thin film for polar material and nonpolar material composite, from top to bottom includes first hot melt adhesive layer, transition layer, second hot melt adhesive layer, first hot melt adhesive layer, transition layer, second hot melt adhesive layer are sequentially bonded connection.

[0005] As a preferred technical scheme, the thickness of the first hot melt adhesive layer is 0.005-0.05mm, preferably 0.01-0.04mm, and most preferably 0.02-0.03mm.

[0006] As a preferred technical scheme, the first hot melt adhesive layer is a polyolefin hot melt adhesive layer.

[0007] Preferably, the polyolefin hot melt adhesive material is selected from at least one of polyethylene (PE), ethylene-vinyl acetate copolymer (EVA), ethylene-propylene-diene rubber (EPDM) and ethylene acrylic acid copolymer (EAA).

[0008] As a preferred technical scheme, the number of layers of the transition layer is 1-10 layers, preferably 1-5 layers, and most preferably 1-2 layers.

[0009] As a preferred technical scheme, the transition layer is a modified polyamide layer, preferably a maleic anhydride modified polyamide layer.

[0010] As a preferred technical solution, the thickness of the transition layer is 0.005-0.05mm, preferably 0.01-0.03mm.

[0011] As a preferred technical solution, the thickness of the second hot melt adhesive layer is 0.005-0.05mm, preferably 0.008-0.02mm.

[0012] As a preferred technical solution, the second hot melt adhesive layer is a polyurethane hot melt adhesive layer.

[0013] As a preferred technical solution, the planar shape of the first hot melt adhesive layer, the transition layer, and the second hot melt adhesive layer is one of a rectangle, a square, a triangle, a circle, a trapezoid, a diamond, a sector, an oval, a heart shape, and a pentagram.

[0014] As a preferred technical solution, the planar area of the transition layer accounts for 50-100% of the planar area of the first hot melt adhesive layer or the second hot melt adhesive layer, preferably 90-100%.

[0015] As a preferred technical solution, the thickness of the film for compounding polar and non-polar materials is 0.015-0.15mm, preferably 0.038-0.08mm.

[0016] The polar material and non-polar material compounding film provided by the utility model realizes effective compounding of polar and non-polar materials by optimizing the film from top to bottom to include a first hot melt adhesive layer, a transition layer, and a second hot melt adhesive layer, and specifically adopting a polyolefin hot melt adhesive layer, a maleic anhydride modified polyamide layer, and a polyurethane hot melt adhesive layer.

[0017] The shape of the polar material and non-polar material compounding film provided by the utility model can be designed based on actual application requirements, thereby expanding the application range of the film.

[0018] Advantages

[0019] 1. The utility model provides a kind of polar material and non-polar material compounding film, realizes effective compounding between metal material and injection material, satisfies the need of automotive interior or other application scenarios.

[0020] 2. The polar material and non-polar material composite film is characterized in that the film comprises a first hot melt adhesive layer, a transition layer and a second hot melt adhesive layer from top to bottom, and the polar material and the non-polar material are effectively combined by adopting a polyolefin hot melt adhesive layer, a maleic anhydride modified polyamide layer and a polyurethane hot melt adhesive layer.

[0021] 3. The utility model discloses a first hot melt adhesive layer, a transition layer and a second hot melt adhesive layer are controlled to guarantee the adhesion strength between the layers, and the subsequent application effect caused by delamination and layering is avoided.

[0022] 4. The polar material and non-polar material composite film provided by the utility model can be designed based on actual application requirements, and the application range of the film is expanded.

[0023] 5. The utility model discloses a simple structure, and large-scale industrial production is easy to realize. ACCURACY OF DRAWINGS

[0024] Figure 1 A polar material and non-polar material composite film structure diagram provided by the utility model embodiment 1, in the drawing: (1) first hot melt adhesive layer, (2) transition layer, (3) second hot melt adhesive layer. DETAILED DESCRIPTION

[0025] The utility model will be described in detail below through embodiments. It is necessary to point out here that the following embodiments are only used to further illustrate the utility model, and cannot be understood as the limitation of the protection scope of the utility model. Some non-essential improvements and adjustments made by the professional technicians in the field according to the above-mentioned contents of the utility model still belong to the protection scope of the utility model.

[0026] Embodiment 1

[0027] Referring to Figure 1 The utility model embodiment 1 provides a polar material and non-polar material composite film, and the film comprises a first hot melt adhesive layer 1, a transition layer 2 and a second hot melt adhesive layer 3 from top to bottom, and the first hot melt adhesive layer 1, the transition layer 2 and the second hot melt adhesive layer 3 are sequentially bonded and connected.

[0028] The thickness of the first hot melt adhesive layer is 0.02mm.

[0029] The first hot melt adhesive layer is a polyolefin hot melt adhesive layer.

[0030] The transition layer is 1 layer.

[0031] The transition layer is a maleic anhydride modified polyamide layer.

[0032] The thickness of the transition layer is 0.015mm.

[0033] The thickness of the second hot melt adhesive layer is 0.01mm.

[0034] The second hot melt adhesive layer is a polyurethane hot melt adhesive layer.

[0035] The top view plane shape of the first hot melt adhesive layer, the transition layer and the second hot melt adhesive layer is all rectangular.

[0036] The top view plane area of the transition layer accounts for 100% of the top view plane area of the first hot melt adhesive layer, and the top view plane area of the first hot melt adhesive layer is equal to the top view plane area of the first hot melt adhesive layer.

[0037] The thickness of the polar material and non-polar material composite film is 0.045mm.

[0038] The interlayer peeling force of the polar material and non-polar material composite film provided in Example 1 is 6.1kg / 2.5cm, and when used for bonding aluminum plate and TPU, the peeling force with the aluminum plate (130℃ / 30s / 5bar) is 4.5kg / 2.5cm, and the peeling force with the TPU (130℃ / 30s / 5bar) is 5.1kg / 2.5cm.

[0039] Example 2

[0040] The embodiment 2 of the utility model provides a polar material and non-polar material composite film, and the specific implementation manner is same with example 1, and the difference lies in that the thickness of the first hot melt adhesive layer is 0.005mm, the thickness of the transition layer is 0.005mm, the thickness of the second hot melt adhesive layer is 0.005mm, and the thickness of the polar material and non-polar material composite film is 0.015mm.

[0041] The interlayer peeling force of the polar material and non-polar material composite film provided in Example 2 is 4kg / 2.5cm, and when used for bonding aluminum plate and TPU, the peeling force with the aluminum plate (130℃ / 30s / 5bar) is 2.5kg / 2.5cm, and the peeling force with the TPU (130℃ / 30s / 5bar) is 2.3kg / 2.5cm.

[0042] Example 3

[0043] The embodiment 3 of the utility model provides a polar material and non-polar material composite film, and the specific implementation manner is same with example 1, and the difference lies in that the thickness of the first hot melt adhesive layer is 0.05mm, the thickness of the transition layer is 0.05mm, the thickness of the second hot melt adhesive layer is 0.05mm, and the thickness of the polar material and non-polar material composite film is 0.15mm.

[0044] The interlayer peeling force of the film for compounding polar material with non-polar material provided by Example 3 was 7 kg / 2.5 cm, and the peeling force with aluminum plate (130 °C / 30 s / 5 bar) was 3.8 kg / 2.5 cm, and the peeling force with TPU (130 °C / 30 s / 5 bar) was 3.5 kg / 2.5 cm.

Claims

1. A film for compounding a polar material with a non-polar material, characterized by: From top to bottom, the first hot melt adhesive layer, the transition layer, the second hot melt adhesive layer are sequentially bonded and connected; the first hot melt adhesive layer is a polyolefin hot melt adhesive layer, the transition layer is a modified polyamide layer, and the second hot melt adhesive layer is a polyurethane hot melt adhesive layer; the thickness of the first hot melt adhesive layer is 0.005-0.05mm; the thickness of the second hot melt adhesive layer is 0.005-0.05mm; the thickness of the transition layer is 0.005-0.05mm; the planar area of the transition layer accounts for 50-100% of the planar area of the first hot melt adhesive layer or the second hot melt adhesive layer.

2. The film for compounding a polar material with a non-polar material according to claim 1, characterized by: The thickness of the first hot melt adhesive layer is 0.01-0.04mm.

3. The film for compounding a polar material with a non-polar material according to claim 1, wherein: The thickness of the second hot melt adhesive layer is 0.008-0.02mm.

4. The film for compounding a polar material with a non-polar material according to claim 1, wherein: The number of layers of the transition layer is 1-10 layers.

5. The film for compounding a polar material with a non-polar material according to claim 1, wherein: The planar shape of the first hot melt adhesive layer, the transition layer, and the second hot melt adhesive layer is one of a rectangle, a square, a triangle, a circle, a trapezoid, a diamond, a sector, an ellipse, a heart, and a pentagram.

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