Release film for polaroid

A release film and polarizer technology, applied in the field of polarizers, to achieve high adhesion, excellent release performance, and prevent the PAS glue from being pulled up

Active Publication Date: 2021-04-16
JIANGSU SHUANGXING COLOR PLASTIC NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

What this prior art discloses is not so much a release film for polarizers as a release agent, basically no problems involving the release film base material, and the release film base material in its examples shows You can choose PET, PVC or PBT. It can be seen that the performance of the release film in the prior art is completely determined by the release agent and has nothing to do with the release film substrate.

Method used

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  • Release film for polaroid
  • Release film for polaroid
  • Release film for polaroid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] With the polybutadiene polyurethane of 60 weight parts, the polyacrylate resin of 45 weight parts, the hydroxypropyl methacrylate of 10 weight parts, the trifluoroethyl methacrylate reactive monomer diluent of 25 weight parts, 25 weight parts Parts of octadecyl methacrylate active monomer diluent are uniformly mixed, adding 1 part by weight of initiator is 2-hydroxyl-2-methyl-1-phenyl-1-propanone, and magnetically stirred for 120 seconds to obtain Release agent.

[0028] The release agent is evenly coated on the surface of the PET release film substrate 10 with a thickness of 39 μm, vacuum defoaming for 1 hour, N 2 The release agent layer 20 was formed after being cured by ultraviolet light irradiation for 180 seconds under certain conditions, and the thickness of the release agent layer 20 was measured to be 5 μm.

[0029] After testing, the release agent layer 20 of this embodiment has good stability below 150°C, without decomposition and detachment, and still has co...

Embodiment 2

[0033] With the polybutadiene polyurethane of 140 weight parts, the polyacrylate resin of 85 weight parts, the hydroxypropyl methacrylate of 25 weight parts, the trifluoroethyl methacrylate reactive monomer diluent of 55 weight parts, 55 weight parts Parts of octadecyl methacrylate active monomer diluent are uniformly mixed, adding 5 parts by weight of the initiator is 2-hydroxyl-2-methyl-1-phenyl-1-acetone, and magnetically stirred for 120 seconds to obtain Release agent.

[0034] The release agent is evenly coated on the surface of the PET release film substrate 10 with a thickness of 55 μm, vacuum defoaming for 1 hour, N2 The release agent layer 20 was formed after being cured by ultraviolet light irradiation for 180 seconds under certain conditions, and the thickness of the release agent layer 20 was measured to be 10 μm.

[0035] After testing, the release agent layer 20 of this embodiment has good stability below 150°C, without decomposition and detachment, and still has...

Embodiment 3

[0039] With the polybutadiene polyurethane of 100 weight parts, the polyacrylate resin of 65 weight parts, the hydroxypropyl methacrylate of 15 weight parts, the trifluoroethyl methacrylate reactive monomer diluent of 40 weight parts, 40 weight parts Parts of octadecyl methacrylate active monomer diluent are uniformly mixed, and the initiator of 3 parts by weight is added as 2-hydroxyl-2-methyl-1-phenyl-1-acetone, and magnetically stirred for 120 seconds to obtain Release agent.

[0040] The release agent is evenly coated on the surface of the PET release film substrate 10 with a thickness of 45 μm, vacuum defoaming for 1 hour, N 2 Under certain conditions, it was irradiated with ultraviolet light and cured for 180 seconds to form a release agent layer 20 , and the thickness of the release agent layer 20 was measured to be 8 μm.

[0041] After testing, the release agent layer 20 of this embodiment has good stability below 150°C, without decomposition and detachment, and still...

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Abstract

The invention discloses a release film for a polaroid. The release film comprises a release film base material and a release agent layer coated on the surface of the release film base material, and the release agent layer is prepared from an ultraviolet light curing release agent prepared from the following raw materials in parts by weight: 60-140 parts of polybutadiene polyurethane, 45-85 parts of polyacrylate resin, 10-25 parts of hydroxypropyl methacrylate, 25-55 parts of a trifluoroethyl methacrylate active monomer diluent, 25-55 parts of an octadecyl methacrylate active monomer diluent and 1-5 parts of 2-hydroxy-2-methyl-1-phenyl-1-acetone serving as an initiator. The ultraviolet curing release agent is an ultraviolet curing release agent without a silicone oil component, high-temperature baking is not needed, no silicone oil seeps out, and the phenomenon that the PAS adhesive is pulled up due to transfer of the silicone oil component is completely eradicated.

Description

technical field [0001] The present application relates to polarizers in the field of optical display, in particular to a release film used for polarizers. Background technique [0002] Polarizer is an indispensable part in the field of optical display, such as LCD display, and it is a film with polarizing function that only allows light in a certain direction to pass through. [0003] figure 1 Shows a schematic structural view of a polarizer that can be used in the present invention, including a protective film 1, a first TAC protective layer 2 and a second TAC protective layer 4, a PVA polarizing layer 3, a PSA pressure-sensitive adhesive layer 5 and a release film 6. [0004] The polarizing function in the polarizer is the PVA polarizing layer 3, the main components are PVA (polyvinyl alcohol) and iodine, generally called iodine-based polarizing film. Polyvinyl alcohol is used as a polarizing film because of its good transparency, extremely low polar moisture permeabili...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/04C09D175/14C09D133/08C09D7/65C08L67/02
Inventor 吴培服王琪池卫
Owner JIANGSU SHUANGXING COLOR PLASTIC NEW MATERIALS
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