CN213141908U - UV visbreaking protective film - Google Patents

Abstract

A UV anti-sticking protective film comprises a PET base film, a copolyester layer and a pressure-sensitive adhesive layer which are positioned above the PET base film, and a release film positioned above the pressure-sensitive adhesive layer, wherein the copolyester layer consists of a plurality of rectangular pyramids, the shapes and the sizes of the rectangular pyramids are the same, the projection of the vertex of each rectangular pyramid is positioned at the center of the bottom surface of each rectangular pyramid, and a bottom edge is shared between every two adjacent rectangular pyramids; the pressure sensitive adhesive layer is filled in the spaces among the rectangular pyramids. The utility model discloses a copolyester layer is specific three-dimensional shape, has increased the adhesion area with pressure-sensitive adhesive, has reduced the possibility that pressure-sensitive adhesive and base film break away from, and under UV shines, the further cross-linking solidification of pressure-sensitive adhesive layer, peel strength descends, simultaneously, has the shrink of certain volume, causes copolyester layer to be being formed the fulcrum by the adhesive surface, further reaches the effect of visbreaking. The utility model discloses when can satisfy the bonding firm, can easily peel off and do not have under UV shines and remain.

Description

UV visbreaking protective film

Technical Field

The utility model relates to a UV visbreaking protection film.

Background

The anti-sticking protective film is divided into a thermal anti-sticking protective film and a UV anti-sticking protective film, and the current anti-sticking protective film is mainly used for the protection of a wafer cutting process and a later picking process, and has a tendency of transferring to the protection of a high-performance toughened glass (such as mobile phone glass) process and the protection of a laser engraving process of a metal rear cover of a mobile phone.

The UV anti-sticking protective film is used as a wafer cutting adhesive tape, the wafer needs to be stuck during wafer cutting, the phenomenon of flying is prevented, and after the wafer is cut, the peeling strength needs to be reduced, so that the wafer is convenient to pick up.

In the practical application process of the UV visbreaking protective film, the following problems can occur: after UV irradiation, the bonding strength of the pressure-sensitive adhesive and the base film is also reduced, so that the pressure-sensitive adhesive is separated from the base film to cause adhesive residue; 2. the balance of the peeling strength before and after picking up the wafer is that the peeling strength before picking up is not enough, or that the peeling is difficult and the adhesive is easy to remain during picking up.

Disclosure of Invention

In order to overcome the above-mentioned not enough of current UV visbreaking protection film, the utility model provides a can solve the UV visbreaking protection film of above-mentioned problem.

The technical proposal of the utility model for solving the technical problem is that: a UV anti-sticking protective film comprises a PET base film, a copolyester layer and a pressure-sensitive adhesive layer which are positioned above the PET base film, and a release film positioned above the pressure-sensitive adhesive layer, wherein the copolyester layer consists of a plurality of rectangular pyramids, the shapes and the sizes of the rectangular pyramids are the same, the projection of the vertex of each rectangular pyramid is positioned at the center of the bottom surface of each rectangular pyramid, and a bottom edge is shared between every two adjacent rectangular pyramids;

the pressure-sensitive adhesive layer is filled in the spaces among the rectangular pyramids and fills the spaces among the rectangular pyramids.

Further, the height of the pressure-sensitive adhesive layer is equal to that of the rectangular pyramid.

The beneficial effects of the utility model reside in that: for ordinary UV visbreaking film, the utility model discloses a copolyester layer is specific three-dimensional shape, has increased the adhesion area with pressure-sensitive adhesive, has reduced the possibility that pressure-sensitive adhesive and base film break away from, and under UV shines, pressure-sensitive adhesive layer further crosslinking solidification, peel strength descends, simultaneously, has the shrink of certain volume, causes copolyester layer to form the fulcrum by the adherend surface shape, further reaches the effect of visbreaking. The utility model provides a UV visbreaking protection film can satisfy when the bonding is firm, can easily peel off and do not have under UV shines and remain.

Drawings

Fig. 1 is a sectional view of the present invention.

Figure 2 is a top view of a copolyester layer.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1 and 2, the UV anti-adhesive protective film comprises a PET base film 1, a copolyester layer 2 and a pressure-sensitive adhesive layer 3 which are positioned above the PET base film 1, and a release film 4 which is positioned above the pressure-sensitive adhesive layer 3, wherein the copolyester layer 2 is composed of a plurality of rectangular pyramids, the shapes and the sizes of the pyramids are the same, the projection of the vertex of each pyramid is positioned at the center of the bottom surface of each pyramid, and a bottom edge is shared between adjacent pyramids.

The pressure-sensitive adhesive layer 3 is filled in the spaces among the rectangular pyramids and fills the spaces among the rectangular pyramids, and after the pressure-sensitive adhesive layer 3 fills the spaces among the rectangular pyramids, the height of the pressure-sensitive adhesive layer 3 is equal to that of the rectangular pyramids.

For ordinary UV visbreaking film, the utility model discloses a copolyester layer 2 is specific three-dimensional shape, has increased the adhesion area with pressure sensitive adhesive layer 3, has reduced the possibility that pressure sensitive adhesive layer 3 and PET base film 1 break away from, and under UV shines, pressure sensitive adhesive layer 3 further crosslinking solidification, peel strength descends, simultaneously, has the shrink of certain volume, causes copolyester layer 2 to form the fulcrum by the adherend surface, further reaches the effect of visbreaking. The utility model provides a UV visbreaking protection film can satisfy when the bonding is firm, can easily peel off and do not have under UV shines and remain.

Claims (2)

1. The utility model provides a UV subtracts and glues protection film, includes PET base film, is located copolyester layer and the pressure sensitive adhesive layer of PET base film top, is located the release film of pressure sensitive adhesive layer top, its characterized in that: the copolyester layer consists of a plurality of rectangular pyramids which are distributed in a rectangular manner, the shapes and the sizes of the rectangular pyramids are the same, the projection of the vertex of each rectangular pyramid is positioned at the center of the bottom surface of the rectangular pyramid, and a bottom edge is shared between the adjacent rectangular pyramids;

the pressure-sensitive adhesive layer is filled in the spaces among the rectangular pyramids and fills the spaces among the rectangular pyramids.

2. The UV detackifying protective film of claim 1, wherein: the height of the pressure-sensitive adhesive layer is equal to that of the rectangular pyramid.

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