CN203521444U

CN203521444U - EVA film

Info

Publication number: CN203521444U
Application number: CN201320418546.XU
Authority: CN
Inventors: 张鹏; 李成利; 徐海燕
Original assignee: KUNSHAN YONGXIANG OPTOELECTRONIC TECHNOLOGY Co Ltd
Current assignee: Crown Advanced Material Co Ltd
Priority date: 2013-07-15
Filing date: 2013-07-15
Publication date: 2014-04-02
Anticipated expiration: 2023-07-15

Abstract

The utility model discloses an EVA film. The surface of the EVA film is of a concave-convex grid structure. The operability and the practicability of the EVA film are good. The beneficial effects are that the surface of the EVA film is of a concave-convex grid shape, on the one hand, an unwinding force is reduced when the EVA film is unwound because of the concave-convex structure, thereby being convenient to use; and one the other hand, the surface area of a concave-convex grid is enlarged, so that a mechanical pincers lock is formed when the EVA film and an EVA adhesive film are packaged and solidified, and bonding power therebetween is remarkably improved. Meanwhile, the EVA film has wide adhesive adaptability and adhesive force designability, and can meet different requirements.

Description

A kind of EVA film

Technical field

The utility model relates to a kind of EVA film, especially a kind of EVA film for photovoltaic module back-protective.

Background technology

Solar energy backboard generally has three-decker, middle substrate layer and inside and outside weathering layer, described intermediate layer and weathering layer are composited by adhesive, outer weathering layer need to have good anti-environmental attack ability, intermediate layer needs high pressure resistant insulation, and internal layer weathering layer need have the adhesive property good with EVA packaging plastic.

Now disclose a kind of solar energy backboard and formed by PVDF/PET/PVDF three-decker, there are good anti-environmental attack ability and insulation property, the existing main dependence on import of pvdf membrane wherein, and in performance, still have necessity of lifting.

utility model content

The purpose of this utility model is, a kind of have extensive bonding adaptability, concaveconvex structure EVA film that cohesive force is strong are provided.

For solving the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of EVA film, is characterized in that: described EVA film has concavo-convex network.

Aforesaid a kind of EVA film, is characterized in that: described EVA film simultaneously has concavo-convex network.

Aforesaid a kind of EVA film, is characterized in that: described EVA film simultaneously has concavo-convex network, and another side is light face.

Aforesaid a kind of EVA film, is characterized in that: the surface configuration of described concavo-convex network is polygon, and described polygon is a kind of in triangle, rectangle, rhombus, pentagon, hexagon, octagon, decagon, dodecagon.

Aforesaid a kind of EVA film, is characterized in that: the surface configuration of described concavo-convex network is preferably rectangle.

Aforesaid a kind of EVA film, is characterized in that: the density of described concavo-convex network is 2-6 lattice/10mm ².

Aforesaid a kind of EVA film, is characterized in that: the cross sectional shape of described concavo-convex network is rectangle or trapezoidal.

Aforesaid a kind of EVA film, is characterized in that: the recess depths of described concavo-convex network is 1-30 μ m.

Aforesaid a kind of EVA film, is characterized in that: the recess depths of described concavo-convex network is 5-15 μ m.

Aforesaid a kind of EVA film, is characterized in that: the roughness of described EVA film light face is less than 3 μ m.

The beneficial effects of the utility model are: on the one hand, when EVA film unreels, owing to having concavo-convex network, uncoiling power reduces, easy to use; On the other hand, the surface area of concavo-convex grid is larger, thereby forms mechanical tong lock during with EVA glued membrane package curing, significantly improves both cohesive forces, has bond widely adaptability and cohesive force designability simultaneously, can meet different demands.

Accompanying drawing explanation

Fig. 1 is the structural representation that the cross sectional shape of the utility model male and fomale(M&F) is rectangle;

Fig. 2 is that the cross sectional shape of the utility model male and fomale(M&F) is trapezoidal structural representation;

Fig. 3 is the structural representation of the EVA film of shiny surface for upper surface in comparative example and lower surface.

Embodiment

For further disclosing the technical solution of the utility model, below in conjunction with accompanying drawing, describe execution mode of the present utility model in detail:

Embodiment 1

As shown in Figure 1, a kind of EVA film, one side is concavo-convex network 1, and the surface configuration of concavo-convex network 1 is rectangle, and cross sectional shape is rectangle, and the degree of depth of recess is 5 μ m, the density of concavo-convex network 1 is 6 lattice/10mm ²; Another side is light face 2, and the roughness of light face 2 is 1 μ m, makes PVDF/PET/EVA (TPE) solar energy backboard, and with 145 ℃/15min of EVA packaging adhesive film cure package, recording with EVA glued membrane cohesive force is 80N/cm(25 ℃).

Embodiment 2

As shown in Figure 2, a kind of EVA film, one side is concavo-convex network 3, and the surface configuration of concavo-convex network 3 is rectangle, and cross sectional shape is trapezoidal, and the degree of depth of recess is 15 μ m, the density of concavo-convex network 3 is 2 lattice/10mm ²; Another side is light face 4, and the roughness of light face 4 is 2 μ m, makes PVDF/PET/EVA (TPE) solar energy backboard, and with 145 ℃/15min of EVA packaging adhesive film cure package, recording with EVA glued membrane cohesive force is 100N/cm(25 ℃).

Comparative example

As shown in Figure 3, a kind of EVA film, upper surface 5 and lower surface 6 are shiny surface, the roughness of shiny surface is 1 μ m, make PVDF/PET/EVA (TPE) solar energy backboard, with 145 ℃/15min of EVA packaging adhesive film cure package, recording with EVA glued membrane cohesive force is 40N/cm(25 ℃).

More than, by description of listed embodiment, basic conception of the present utility model and basic principle have been set forth.But the utility model is never limited to above-mentioned listed execution mode, every equivalent variations of doing based on the technical solution of the utility model, improvement and deliberately become of inferior quality behavior, all should belong to protection range of the present utility model.

Claims

1. an EVA film, it is characterized in that: described EVA film has concavo-convex network, the surface configuration of described concavo-convex network is polygon, described polygon is a kind of in triangle, rectangle, rhombus, pentagon, hexagon, octagon, decagon, dodecagon, and the density of described concavo-convex network is 2-6 lattice/10mm ², the recess depths of described concavo-convex network is 1-30 μ m.

2. a kind of EVA film according to claim 1, is characterized in that: described EVA film simultaneously has concavo-convex network.

3. a kind of EVA film according to claim 1, is characterized in that: described EVA film simultaneously has concavo-convex network, and another side is light face.

4. a kind of EVA film according to claim 1, is characterized in that: the surface configuration of described concavo-convex network is rectangle.

5. a kind of EVA film according to claim 1, is characterized in that: the cross sectional shape of described concavo-convex network is rectangle or trapezoidal.

6. a kind of EVA film according to claim 1, is characterized in that: the recess depths of described concavo-convex network is 5-15 μ m.

7. a kind of EVA film according to claim 3, is characterized in that: the roughness of described EVA film light face is less than 3 μ m.