Transferable liquid crystal laminate

A technology of liquid crystal layer and transferability, which is applied in the field of transferable liquid crystal laminates, and can solve the problems of poor foil separation characteristics, inability to perform sufficient transfer, residue, etc.

Inactive Publication Date: 2005-12-14
NIPPON OIL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the peeling force is too small, the peelability becomes good, but since the peeling phenomenon occurs in the peeled part accompanying the non-peeled part, the foil separation property deteriorates
In addition, if the peeling force is too large, the peelability will deteriorate, and sufficient transfer to the substrate cannot be performed, and a part of the peeled transfer layer will remain on the re-peeled substrate side.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

reference example 1

[0058] Using 50mmol of terephthalic acid, 20mmol of hydroxybenzoic acid, 20mmol of catechol, 10mmol of (R)-2-methyl-1,4-butanediol and 100mg of sodium acetate, press 180°C for 1 hour under nitrogen atmosphere , 1 hour at 200°C, and 1 hour at 250°C, the polycondensation reaction proceeds while the temperature is raised.

[0059] Next, the polycondensation reaction was continued at 250° C. for 2 hours while nitrogen was passed, and then the polycondensation was carried out at the same temperature under reduced pressure for 1 hour. The obtained polymer was dissolved in tetrachloroethane, and reprecipitated with methanol to obtain a liquid crystalline polyester.

[0060] An N-methyl-2-pyrrolidone solution (20% by weight) of the obtained liquid crystalline polyester was prepared, and the solution was applied to a rubbed polyphenylene sulfide film by spin coating. After coating, a drying treatment is performed to remove N-methyl-2-pyrrolidone and form a coated film of liquid crysta...

Embodiment 1

[0071] On the cholesteric liquid crystal surface of the cholesteric alignment film obtained in Reference Example 1, 5.0% by weight of benzophenone-based ultraviolet rays, which were used as an adhesive to form a protective layer, were used as a protective layer by the bar coating method. Ultraviolet curable adhesive of absorber CyasorbUV-24 (manufactured by Cytec Co., Ltd.) [Aronix UV-3630 (trade name) manufactured by Toagosei Co., Ltd. was replaced by M-150 (trade name) manufactured by the same company and M-315 (trade name) is diluted, and the viscosity is adjusted to 300mPa·s] and applied according to the thickness of 5μm.

[0072] Next, using a desktop laminator, the easily-adhesive-treated surface of Teijin DuPont's easily-adhesive-treated PET G2P 8-25 μm used as a releasable substrate was bonded together to become the above-mentioned adhesive-coated surface, and ultraviolet rays were irradiated. , to cure the adhesive to form a laminate of releasable substrate / protective...

Embodiment 2

[0080] On the cholesteric liquid crystal surface of the cholesteric alignment film obtained in Reference Example 1, 5.0% by weight of benzophenone-based ultraviolet rays, which were used as an adhesive to form a protective layer, were used as a protective layer by the bar coating method. Ultraviolet curable adhesive of absorber CyasorbUV-24 (manufactured by Cytec Co., Ltd.) [Aronix UV-3630 (trade name) manufactured by Toagosei Co., Ltd. was replaced by M-150 (trade name) manufactured by the same company and M-315 (trade name) is diluted, and the viscosity is adjusted to 300mPa·s] and applied according to the thickness of 5μm.

[0081] Next, using a table-top laminator, the easily-adhesive treated surface of Teijin DuPont's easily-adhesive-treated PET SG 2-38 μm used as a releasable substrate was bonded together to form the above-mentioned adhesive-coated surface, and ultraviolet rays were irradiated. , to cure the adhesive to form a laminate of releasable substrate / protective ...

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Abstract

In a transferable liquid crystal laminate containing a cholesteric liquid crystal layer, it is possible to provide a transferable liquid crystal with good separation characteristics as foil, excellent transfer state after transfer, and less occurrence of burrs that cause yield reduction. The laminate is composed of at least a releasable substrate / protective layer / cholesteric liquid crystal layer, and is a transferable liquid crystal laminate in which an adhesion-facilitating treatment is performed on the protective layer side of the releasable substrate.

Description

technical field [0001] The present invention relates to a transferable liquid crystal laminate having a cholesteric liquid crystal layer used for the purpose of imparting a design improvement effect or an anti-counterfeiting effect, and more specifically relates to re-peelability by using an easy-adhesive treatment The substrate is a transferable liquid crystal laminate in which foil cutting characteristics are improved. Background technique [0002] In recent years, as an anti-counterfeiting item or as an appearance design component, the utilization of holograms and the method of selective reflection of cholesteric liquid crystals have been developed (referring to for example: Japanese Patent Application Publication No. 63-51193, Japanese Publication No. 4-144796 ). [0003] These anti-counterfeiting items etc. are usually prepared in the form of a transfer laminate film, and are transferred from the transfer laminate film to a printing body by a method such as hot pressin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B42D15/10B32B7/06G02B5/30G09F19/12
CPCB32B7/06G02B5/3016Y10T428/31504B32B27/00G02B5/30
Inventor 铃木慎一郎
Owner NIPPON OIL CO LTD
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