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A kind of protective film that does not rebound under hot pressing and preparation method thereof

A technology of protective film and protective film layer, which is applied in the directions of heat-activated film/sheet, chemical instrument and method, film/sheet release liner, etc. Production cost and other issues, to achieve the effect of reducing overall hardness, excellent hot-pressing performance, and high production efficiency

Active Publication Date: 2019-04-19
NALI OPTICAL MATERIAL DONGGUAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The overall structure of the protective film that can be attached to the curved edge in the market is not much different from the conventional three-layer protective film. However, after the traditional protective film is hot-pressed, the curved edge will rebound and cannot be shaped for a long time. This is currently manufactured. The difficulty of arc edge protective film
[0003] Some manufacturers will reduce the rebound phenomenon by increasing the thickness of the silicone layer or reducing the hardness of the UV glue, but because of the high toughness of PET, the improvement effect is often not obvious
Moreover, after the hardness of UV glue is reduced, the scratch resistance and wear resistance of the surface will be reduced, and the protective effect will be greatly reduced, while the increase of the thickness of silica gel will increase the production cost and affect the bonding effect.

Method used

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  • A kind of protective film that does not rebound under hot pressing and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] See figure 1 , a protective film that does not rebound after hot pressing, including a protective film layer 1, a protective adhesive layer 2, a use film layer 3 and a peeling film layer 4 sequentially pasted from top to bottom; the use film layer 3 includes The UV hard glue layer 31 on the lower surface of layer 2, the first UV soft glue layer 32 that is attached to the lower surface of the UV hard glue layer 31, the base material layer 33 that is attached to the lower surface of the first UV soft glue layer 32, and the bonding The second UV soft adhesive layer 34 on the lower surface of the substrate layer 33, and the peeling adhesive layer 35 attached to the lower surface of the second UV soft adhesive layer 34, the lower surface of the peeling adhesive layer 35 and the upper surface of the peeling film layer 4 fit.

[0036] The protective film layer 1, the substrate layer 33 and the peeling film layer 4 are all PET films with a light transmittance of more than 91%;...

Embodiment 2

[0049] The difference between this embodiment and the above-mentioned embodiment 1 is that: the protective film layer 1, the substrate layer 33 and the peeling film layer 4 are all PEN films with a light transmittance of more than 91%; the peeling film layer 4 It is a non-silicon-treated release film; the UV hard rubber layer 31 is a polyurethane rubber layer with a hardness of 2H; the first UV soft rubber layer 32 and the second UV soft rubber layer 34 are both hard at 0.6H Polyurethane adhesive layer.

[0050] The thickness of the protective film layer 1, the substrate layer 33 and the peeling film layer 4 is 60 μm; the thickness of the protective adhesive layer 2 is 8 μm; the thickness of the peeling adhesive layer 35 is 40 μm; the UV hard adhesive layer 31. Both the first UV soft glue layer 32 and the second UV soft glue layer 34 have a thickness of 3 μm.

[0051] The raw material of the UV hard glue layer 31 is polyurethane resin glue of model 6146-100 produced by Changx...

Embodiment 3

[0058] The difference between this embodiment and the above-mentioned embodiment 1 is that: the protective film layer 1, the substrate layer 33 and the peeling film layer 4 are all PC films with a light transmittance of more than 91%; the peeling film layer 4 It is a fluoroplastic release film; the UV hard glue layer 31 is an acrylic glue layer with a hardness of 3H; the first UV soft glue layer 32 and the second UV soft glue layer 34 are both acrylic glue layers with a hardness of 0.5H .

[0059] The thickness of the protective film layer 1, the substrate layer 33 and the peeling film layer 4 is 120 μm; the thickness of the protective adhesive layer 2 is 12 μm; the thickness of the peeling adhesive layer 35 is 60 μm; the UV hard adhesive layer 31. Both the first UV soft glue layer 32 and the second UV soft glue layer 34 have a thickness of 5 μm.

[0060] The raw materials of the protective adhesive layer 2 and the peeling adhesive layer 35 are silicone pressure-sensitive adh...

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Abstract

The invention relates to the technical field of protective films, in particular to a protective film capable of not rebounding after being hot-pressed and a preparation method thereof. The protective film comprises a protective film layer, a protective glue layer, a using film layer and a stripping film layer which are sequentially attached from top to bottom; the using film layer comprises a UV hard glue layer attached to the lower surface of the protective glue layer, a first UV soft glue layer attached to the lower surface of the UV hard glue layer, a substrate layer attached to the lower surface of the first UV soft glue layer, a second UV soft glue layer attached to the lower surface of the substrate layer and a stripping glue layer attached to the lower surface of the second UV soft glue layer, and the lower surface of the stripping glue layer is attached to the upper surface of the stripping film layer. The protective film has the good hot-press molding property and is high in sizing capacity after being hot-pressed.

Description

technical field [0001] The invention relates to the technical field of protective films, in particular to a protective film that does not rebound after hot pressing and a preparation method thereof. Background technique [0002] The overall structure of the protective film that can be attached to the curved edge in the market is not much different from the conventional three-layer protective film. However, after the traditional protective film is hot-pressed, the curved edge will rebound and cannot be shaped for a long time. This is currently manufactured. The difficulty of arc edge protection film. [0003] Some manufacturers will reduce the rebound phenomenon by increasing the thickness of the silicone layer or reducing the hardness of the UV glue, but because of the high toughness of PET, the improvement effect is often not obvious. Moreover, after the hardness of the UV glue is reduced, the scratch resistance and wear resistance of the surface will be reduced, and the p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/36C09J7/29C09J7/40C09J7/30
CPCC09J7/22C09J7/35C09J2301/302C09J2433/00C09J2463/00C09J2475/00C09J2483/005
Inventor 朱文峰
Owner NALI OPTICAL MATERIAL DONGGUAN
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