Anti-aging PVC (polyvinyl chloride) composite protective film

Abstract

The utility model discloses an anti-aging PVC (polyvinyl chloride) composite protective film, which comprises a PVC layer, a protective film layer and a protective film layer, the waterproof composite layer is arranged on the first surface and is mainly made of polyethylene; the heat-resistant composite layer is arranged on the surface, far away from the PVC layer, of the waterproof composite layer and is mainly made of biaxially oriented polyester; the mounting adhesive layer is arranged on the second surface; the waterproof composite layer comprises a blocking layer and an anti-ultraviolet layer; the heat-resistant composite layer comprises a heat reflection layer and / or a heat insulation layer. The anti-aging PVC composite protective film is reasonable in structure, the waterproof performance of the protective film is improved through the waterproof composite layer made of a polyethylene material, the heat resistance of the protective film is improved through the heat-resistant composite layer made of a biaxially oriented polyester material, and the anti-aging performance of the protective film is improved through the arrangement of the anti-ultraviolet layer, the heat reflection layer and the heat insulation layer.

Description

Technical Field

[0001] The utility model relates to the technical field of protective films, in particular to an anti-aging PVC composite protective film. Background Art

[0002] Polyvinyl chloride film (PVC) has been widely used in many fields due to its low cost, good flexibility, etc., especially in the construction and packaging industries. However, due to the structural factors and structural defects of polyvinyl chloride, the thermal stability and light resistance of polyvinyl chloride are relatively poor.

[0003] In the prior art, an anti-aging PVC composite film disclosed in CN216942169U improves the gas barrier, light barrier and anti-aging properties. However, the aluminized PET film easily causes the transparency of the composite film to decrease.

[0004] Therefore, it is necessary to improve the anti-aging PVC composite protective film in the prior art. Summary of the Utility Model

[0005] The purpose of the utility model is to overcome the defects existing in the prior art, and provide an anti-aging PVC composite protective film. The waterproof performance of the protective film is improved through a waterproof composite layer made of polyethylene material, the heat resistance performance of the protective film is improved through a heat-resistant composite layer made of biaxially oriented polyester material, and the anti-aging performance of the protective film is improved through the setting of an anti-ultraviolet layer, a heat reflection layer and a heat insulation layer.

[0006] To achieve the above technical effects, the technical solution of the utility model is: an anti-aging PVC composite protective film, including;

[0007] A PVC layer, having a first surface and a second surface opposite to each other along the layer thickness direction;

[0008] A waterproof composite layer, arranged on the first surface, and the main material is polyethylene;

[0009] A heat-resistant composite layer, arranged on the surface of the waterproof composite layer away from the PVC layer, and the main material is biaxially oriented polyester;

[0010] An installation adhesive layer, arranged on the second surface;

[0011] The waterproof composite layer includes a barrier layer and an anti-ultraviolet layer;

[0012] The heat-resistant composite layer includes a heat reflection layer and / or a heat insulation layer.

[0013] The preferred technical solution is that the waterproof composite layer is a laminated structure of an anti-ultraviolet layer / barrier layer / polyethylene inner layer, or an anti-ultraviolet layer / polyethylene subsurface layer / barrier layer / polyethylene inner layer, and the barrier layer is a copolyamide layer or an EVOH layer.

[0014] Preferably, the anti-ultraviolet layer is disposed adjacent to the heat-resistant composite layer.

[0015] Preferably, the inner polyethylene layer is high-density polyethylene, and the secondary polyethylene layer is low-density polyethylene.

[0016] Preferably, the heat-resistant composite layer is a laminated structure of PET layer / heat-insulating layer / PET layer, or PET layer / heat-reflecting layer / heat-insulating layer / PET layer, or PET layer / heat-reflecting layer / PET layer.

[0017] Preferably, the raw material of the heat-insulating layer includes nano CTO cesium tungsten bronze powder.

[0018] Preferably, the heat-reflecting layer is one of an aluminum oxide reflecting layer, a titanium dioxide reflecting layer, a zinc oxide reflecting layer, and a tin oxide reflecting layer.

[0019] Preferably, both between the PVC layer and the waterproof composite layer and between the waterproof composite layer and the heat-resistant composite layer are connected through an adhesive layer, and the material of the adhesive layer is one of an acrylic adhesive, a polyurethane adhesive, and a silicone rubber binder.

[0020] Preferably, the barrier layer is connected to the inner polyethylene layer and the anti-ultraviolet layer through a maleic acid modified adhesive layer, or the barrier layer is connected to the inner polyethylene layer and the secondary polyethylene layer through a maleic acid modified adhesive layer.

[0021] Preferably, a polyurethane wear-resistant coating is provided on the surface of the heat-resistant composite layer away from the waterproof composite layer.

[0022] The advantages and beneficial effects of the present utility model are as follows:

[0023] The structure of the anti-aging PVC composite protective film is reasonable. The waterproof performance of the protective film is improved through the waterproof composite layer made of polyethylene, and the anti-aging performance of the protective film is improved by combining the provided anti-ultraviolet layer; the heat resistance of the protective film is improved through the heat-resistant composite layer made of biaxially oriented polyester, and the anti-aging performance of the protective film is further improved by combining the provided heat-reflecting layer and heat-insulating layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic structural view of Embodiment 1 of the anti-aging PVC composite protective film of the present utility model;

[0025] Figure 2 is a schematic structural view of Embodiment 2 of the anti-aging PVC composite protective film of the present utility model.

[0026] In the figure: 1, PVC layer; 2, waterproof composite layer; 3, heat-resistant composite layer; 4, polyurethane wear-resistant coating; 11, connecting adhesive layer; 20, maleic acid-modified adhesive layer; 21, anti-ultraviolet layer; 22, barrier layer; 23, polyethylene inner layer; 24, polyethylene sub-surface layer; 30, PET layer; 31, heat-insulating layer; 100, installation adhesive layer; 301, heat-reflective layer. Detailed implementation manners

[0027] The following combines the drawings and embodiments to further describe the detailed implementation manners of the present utility model. The following embodiments are only used to more clearly illustrate the technical solutions of the present utility model and cannot be used to limit the protection scope of the present utility model.

[0028] "Inner layer" and "sub-surface" are referenced based on the normal use state of the aging-resistant PVC composite protective film, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model.

[0029] In addition, terms such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present creation of the utility model, unless otherwise stated, the meaning of "a plurality" is two or more.

[0030] As Figures 1 - 2 shown, an aging-resistant PVC composite protective film disclosed by the present utility model includes a PVC layer 1, a waterproof composite layer 2, and a heat-resistant composite layer 3. The PVC layer 1 has a first surface (not marked) and a second surface (not marked) opposite to each other along the layer thickness direction; the waterproof composite layer 2 is arranged on the first surface, and the main material is polyethylene; the heat-resistant composite layer 3 is arranged on the surface of the waterproof composite layer 2 far from the PVC layer 1, and the main material is biaxially oriented polyester; the installation adhesive layer 100 is arranged on the second surface; the waterproof composite layer 2 includes a barrier layer 22 and an anti-ultraviolet layer 21; the heat-resistant composite layer 3 includes a heat-reflective layer and / or a heat-insulating layer 31.

[0031] The waterproof performance of the protective film is improved through the waterproof composite layer 2 made of polyethylene, and the aging resistance of the protective film is improved by combining the provided anti-ultraviolet layer 21; the heat resistance of the protective film is improved through the heat-resistant composite layer 3 made of biaxially oriented polyester, and the aging resistance of the protective film is further improved by combining the provided heat-reflective layer and heat-insulating layer 31.

[0032] Among them, the installation adhesive layer 100 is an anti-aging adhesive layer, and the material of the installation adhesive layer 100 is one of acrylic adhesives, polyurethane adhesives, and silicone rubber adhesives.

[0033] Optimize the structure of the waterproof composite layer made of polyethylene material. In some embodiments, the waterproof composite layer 2 is a laminated structure of an anti-ultraviolet layer / barrier layer / polyethylene inner layer; in some other embodiments, the waterproof composite layer 2 is a laminated structure of an anti-ultraviolet layer / polyethylene subsurface layer / barrier layer / polyethylene inner layer, and the barrier layer 22 is a copolyamide layer or an EVOH layer. Among them, the anti-ultraviolet layer 21 is a linear low-density polyethylene layer containing anti-ultraviolet masterbatch, and the linear low-density polyethylene has excellent mechanical properties; the polyethylene subsurface layer 24 is low-density polyethylene, which improves the transparency of the waterproof composite layer made of polyethylene material. Copolyamide usually has better barrier properties, especially excellent in gas barrier, suitable for application scenarios that require higher barrier performance, and has good toughness. EVOH has good barrier properties, has excellent barrier properties to gases (such as oxygen, carbon dioxide), also shows excellent blocking effects on moisture and solvents, etc.; has good transparency and gloss, suitable for applications that require high transparency; also has relatively high mechanical strength and good wear resistance; has good cold resistance and can maintain good toughness in low-temperature environments; has good thermal stability and can be used for thermal processing; has good chemical resistance and can resist a variety of acids, alkalis and other chemical substances. Further, the barrier layer is connected to the polyethylene inner layer and the anti-ultraviolet layer through a maleic acid-modified adhesive layer, or the barrier layer is connected to the polyethylene inner layer and the polyethylene subsurface layer through a maleic acid-modified adhesive layer. This not only improves the connection firmness between the barrier layer and the adjacent layers, but also optimizes the mechanical properties of the waterproof composite layer.

[0034] The anti-ultraviolet layer 21 is arranged close to the heat-resistant composite layer 3. Further, the anti-ultraviolet layer 21 is arranged in a single layer or multiple layers, that is, the anti-ultraviolet layer 21 can be composed of a single unit anti-ultraviolet layer, or can be composed of two or more unit anti-ultraviolet layers. The anti-ultraviolet performance of the anti-ultraviolet layer 21 arranged in multiple layers is more persistent.

[0035] Further, the polyethylene inner layer 23 is high-density polyethylene, thereby optimizing the gas barrier and water barrier properties of the waterproof composite layer made of polyethylene material.

[0036] In some embodiments, the heat-resistant composite layer 3 is a laminated structure of a PET layer / heat insulation layer / PET layer.

[0037] In some embodiments, the heat-resistant composite layer 3 is a laminated structure of a PET layer / heat reflection layer / heat insulation layer / PET layer.

[0038] In some embodiments, the heat-resistant composite layer 3 is a laminated structure of a PET layer / heat reflection layer / PET layer.

[0039] Among them, the PET layer can be prepared by co - extrusion of a three - layer ABA - type structure; the PET layers are connected by an acrylic pressure - sensitive adhesive, and the heat - insulating layer can be prepared by adding nano - CTO cesium tungsten bronze powder to the acrylic pressure - sensitive adhesive solution and curing. The heat - reflecting layer can also be prepared by adding one of alumina, titanium dioxide, zinc oxide, and tin oxide to the acrylic pressure - sensitive adhesive solution and curing. The heat - reflecting layer can also be prepared by adding one of alumina, titanium dioxide, zinc oxide, and tin oxide particles to one of the A layers during the preparation of the PET layer by ABA - type three - layer co - extrusion. Among them, the heat - reflecting layer is close to the other PET layer to reduce the problem of particle precipitation, and a PET layer with a laminated structure of PET(A) / PET(B) / heat - reflecting layer(A) is prepared.

[0040] Between the PVC layer 1 and the waterproof composite layer 2, and between the waterproof composite layer 2 and the heat - resistant composite layer 3, they are all connected by a connecting adhesive layer 11. The material of the connecting adhesive layer 11 is one of acrylic adhesives, polyurethane adhesives, and silicone rubber adhesives. The silicone rubber adhesive can maintain stability at a relatively high temperature, usually can withstand temperatures above 200 °C; has excellent weather resistance and aging resistance, and can maintain good bonding performance in harsh environments; is usually relatively soft and has a certain elasticity, suitable for applications that require bending or deformation. The polyurethane adhesive usually has high bonding strength and tear strength; has good wear - resistant performance, suitable for application scenarios that require wear resistance; has good resistance to most organic solvents; and has good flexibility. The acrylic adhesive usually has high transparency; has good weather resistance and is not easily aged due to ultraviolet rays or weather changes; has good initial adhesion and a long service life, and performs well in outdoor applications.

[0041] In order to further improve the durability of the protective film, a polyurethane wear - resistant coating 4 is provided on the surface of the heat - resistant composite layer 3 away from the waterproof composite layer 2.

[0042] Example 1

[0043] As Figure 1 shown, the aging - resistant PVC composite protective film of Example 1 includes a PVC layer 1, a waterproof composite layer 2, and a heat - resistant composite layer 3. The PVC layer 1 has a first surface and a second surface opposite to each other along the layer thickness direction; the waterproof composite layer 2 is disposed on the first surface, and its main material is polyethylene; the heat - resistant composite layer 3 is disposed on the surface of the waterproof composite layer 2 away from the PVC layer 1, and its main material is biaxially oriented polyester. A polyurethane wear - resistant coating 4 is provided on the surface of the heat - resistant composite layer 3 away from the waterproof composite layer 2.

[0044] The waterproof composite layer 2 has a laminated structure of an ultraviolet-resistant layer 21 / a barrier layer 22 / a polyethylene inner layer 23. The barrier layer 22 is connected to the polyethylene inner layer 23 and the ultraviolet-resistant layer 21 through a maleic acid-modified adhesive layer 20. The waterproof composite layer 2 is a five-layer co-extruded film. The heat-resistant composite layer 3 has a laminated structure of a PET layer 30 / a heat-insulating layer 31 / a PET layer 30. Both between the PVC layer 1 and the waterproof composite layer 2 and between the waterproof composite layer 2 and the heat-resistant composite layer 3 are connected through a connecting adhesive layer 11, and the material of the connecting adhesive layer 11 is an acrylic adhesive.

[0045] Embodiment 2

[0046] As Figure 2 shown, Embodiment 2 is based on Embodiment 1, and the difference is that the waterproof composite layer 2 has a laminated structure of an ultraviolet-resistant layer 21 / a polyethylene subsurface layer 24 / a barrier layer 22 / a polyethylene inner layer 23, wherein the ultraviolet-resistant layer 21 is provided with two layers. The heat-resistant composite layer 3 has a laminated structure of a PET layer 30 / a heat-reflective layer 301 / a heat-insulating layer 31 / a PET layer 30.

[0047] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. An anti-aging PVC composite protective film, characterized in that, Comprising; A PVC layer having a first surface and a second surface opposite to each other in the layer thickness direction; A waterproof composite layer disposed on the first surface, the main material of which is polyethylene; A heat-resistant composite layer disposed on the surface of the waterproof composite layer away from the PVC layer, the main material of which is biaxially oriented polyester; An installation adhesive layer disposed on the second surface; The waterproof composite layer includes a barrier layer and an anti-ultraviolet layer; The heat-resistant composite layer includes a heat-reflecting layer and / or a heat-insulating layer.

2. The anti-aging PVC composite protective film according to claim 1, wherein The waterproof composite layer is a laminated structure of an anti-ultraviolet layer / barrier layer / polyethylene inner layer, or an anti-ultraviolet layer / polyethylene subsurface layer / barrier layer / polyethylene inner layer, and the barrier layer is a copolymerized nylon layer or an EVOH layer.

3. The anti-aging PVC composite protective film according to claim 2, characterized in that, The anti-ultraviolet layer is disposed close to the heat-resistant composite layer.

4. The anti-aging PVC composite protective film according to claim 2, characterized in that, The polyethylene inner layer is high-density polyethylene, and the polyethylene subsurface layer is low-density polyethylene.

5. The anti-aging PVC composite protective film according to claim 1, characterized in that The heat-resistant composite layer is a laminated structure of a PET layer / heat-insulating layer / PET layer, or a PET layer / heat-reflecting layer / heat-insulating layer / PET layer, or a PET layer / heat-reflecting layer / PET layer.

6. The anti-aging PVC composite protective film according to claim 5, characterized in that, The heat-reflecting layer is one of an aluminum oxide reflecting layer, a titanium dioxide reflecting layer, a zinc oxide reflecting layer, and a tin oxide reflecting layer.

7. The anti-aging PVC composite protective film according to claim 1, characterized in that, Both between the PVC layer and the waterproof composite layer and between the waterproof composite layer and the heat-resistant composite layer are connected by a connecting adhesive layer, and the material of the connecting adhesive layer is one of an acrylic adhesive, a polyurethane adhesive, and a silicone rubber adhesive.

8. The anti-aging PVC composite protective film according to claim 2, wherein The barrier layer is connected to the polyethylene inner layer and the anti-ultraviolet layer through a maleic acid-modified adhesive layer, or the barrier layer is connected to the polyethylene inner layer and the polyethylene subsurface layer through a maleic acid-modified adhesive layer.

9. The anti-aging PVC composite protective film according to claim 1, characterized in that A polyurethane wear-resistant coating is disposed on the surface of the heat-resistant composite layer away from the waterproof composite layer.

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