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Preparation method of UV viscosity reducing protective film

A technology of protective film and base film, applied in the direction of adhesives, polymer adhesive additives, film/sheet-like adhesives, etc. and other problems, to achieve the effect of high peel strength and reduced peel strength

Active Publication Date: 2020-10-16
NINGBO DXC NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the actual application process of UV viscosity-reducing protective film, the following problems will occur: 1. After UV irradiation, the bonding strength of the pressure-sensitive adhesive and the base film will also decrease, resulting in the detachment of the pressure-sensitive adhesive and the base film resulting in residual glue; 2. The balance of the peeling strength before and after wafer picking is either that the peeling strength is not enough before picking up, or it is difficult to peel off when picking up, and the glue is easy to remain

Method used

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  • Preparation method of UV viscosity reducing protective film
  • Preparation method of UV viscosity reducing protective film

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment one, the preparation method of above-mentioned UV viscosity-reducing protective film, comprises the following steps:

[0032] S1. The copolyester layer raw material and the PET base layer raw material are respectively extruded through two extruders and then co-extruded to form a base film.

[0033] S2. The base film is stretched longitudinally and transversely to form a stretched film.

[0034] S3. Extrude a number of rectangular pyramids distributed on the copolyester layer with a patterned heated molding roller, each quadrangular pyramid has the same shape and size, and the projection of the apex of each quadrangular pyramid is located on the bottom surface of the quadrangular pyramid The center of the adjacent quadrangular pyramids share a base.

[0035] S4. Treating the surface of the base film to increase the surface roughness, that is, corona treatment.

[0036] S5. Fill the space between the quadrangular pyramids with an ultraviolet debonding layer, ...

Embodiment 2

[0044] Embodiment two, the preparation method of above-mentioned UV viscosity-reducing protective film, comprises the following steps:

[0045] S1. The copolyester layer raw material and the PET base layer raw material are respectively extruded through two extruders and then co-extruded to form a base film.

[0046] S2. The base film is stretched longitudinally and transversely to form a stretched film.

[0047] S3. Extrude a number of rectangular pyramids distributed on the copolyester layer with a patterned heated molding roller, each quadrangular pyramid has the same shape and size, and the projection of the apex of each quadrangular pyramid is located on the bottom surface of the quadrangular pyramid The center of the adjacent quadrangular pyramids share a base.

[0048] S4. Treating the surface of the base film to increase the surface roughness, that is, plasma treatment.

[0049] S5. Fill the space between the quadrangular pyramids with an ultraviolet debonding layer, ...

Embodiment 3

[0057] Embodiment three, the preparation method of above-mentioned UV viscosity-reducing protective film, comprises the following steps:

[0058] S1. The copolyester layer raw material and the PET base layer raw material are respectively extruded through two extruders and then co-extruded to form a base film.

[0059] S2. The base film is stretched longitudinally and transversely to form a stretched film.

[0060] S3. Extrude a number of rectangular pyramids distributed on the copolyester layer with a patterned heated molding roller, each quadrangular pyramid has the same shape and size, and the projection of the apex of each quadrangular pyramid is located on the bottom surface of the quadrangular pyramid The center of the adjacent quadrangular pyramids share a base.

[0061] S4. Treating the surface of the base film to increase the surface roughness, that is, corona treatment.

[0062] S5. Fill the space between the quadrangular pyramids with an ultraviolet debonding layer...

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Abstract

A preparation method of a UV viscosity reducing protective film comprises the following steps: S1, respectively extruding a copolyester layer raw material and a PET base layer raw material by two extruders and then co-extruding to form a base film; S2, performing longitudinal stretching and transverse stretching on the base film to form a stretch film; S3, pressing a plurality of rectangular pyramids distributed in a rectangular shape on the copolyester layer by using a heated mould pressing roller with patterns; S4, carrying out an addition surface treatment on the surface of the base film; and S5, filling the space between the rectangular pyramids with an ultraviolet viscosity reducing layer, and then attaching a release film to the ultraviolet viscosity reducing layer. Compared with a common UV viscosity reducing film, the contact area between the ultraviolet viscosity reducing layer and the base film is much larger, the peeling strength is large; the base film does not influence the contact between the ultraviolet viscosity reducing layer and a bonded object, the peeling strength is not influenced, after UV irradiation, the ultraviolet viscosity reducing layer is further crosslinked, part of the base film is exposed from the ultraviolet viscosity reducing layer and forms a fulcrum on the surface of the bonded object, and the peeling strength is further reduced.

Description

technical field [0001] The invention relates to a preparation method of a UV viscosity-reducing protective film. Background technique [0002] The anti-viscosity protective film is divided into thermal anti-viscosity protective film and UV anti-viscosity protective film. At present, the anti-viscosity protective film is mainly used for the protection of the wafer cutting process and the later picking process, and also for the process of high-performance tempered glass (such as mobile phone glass) The protection and the laser engraving process of the metal back cover of the mobile phone protect the trend on the transfer. [0003] The UV adhesion-reducing protective film is used as a wafer dicing tape. It needs to stick to the wafer during wafer dicing to prevent the phenomenon of flying pieces. After the wafer dicing is completed, it needs to reduce the peel strength for easy picking. [0004] In the actual application process of UV viscosity-reducing protective film, the fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/29C09J7/25C09J7/30C09J4/02C09J11/06C09J11/08
CPCC09J7/29C09J7/30C09J4/00C09J11/06C09J11/08C09J2467/006
Inventor 罗培栋王立超
Owner NINGBO DXC NEW MATERIAL TECH
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