Mold release film

A technology of release film and release layer, which is applied in the field of release film, can solve the problems such as the decline of product yield, and achieve the effects of less precipitation, high industrial value, and good adhesion of the coating film

Inactive Publication Date: 2008-05-21
MITSUBISHI POLYESTER FILM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In the inspection process of optical evaluation such as the display ability, color tone, contrast, and foreign matter incorporation of liquid crystal polarizing plates, measures have been taken to inspect products visually or with a magnifying glass to prevent defective products from being shipped out. When the release film of the oligomer is formed, there are still problems such as being judged as a defective product due to foreign matter mixed in, which reduces the yield of the product, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0071] Hereinafter, the present invention will be described in more detail through examples. However, it is not limited to the following examples unless the gist of the present invention is exceeded. The measuring method used in the present invention is as follows.

[0072] (1) Determination of intrinsic viscosity of polyester:

[0073] Accurately weigh 1 g of polyester that has been removed from other polymer components and pigments that are incompatible with polyester, add 100 ml of mixed solvent of phenol / tetrachloroethane=50 / 50 (weight ratio), dissolve it, and heat it at 30 ° C. Next measure.

[0074] (2) Average particle size (d 50 : μm) Determination:

[0075] The value of the cumulative (weight basis) 50% of the equivalent particle size distribution measured using a centrifugal sedimentation type particle size distribution analyzer (SA-CP3 type manufactured by Shimadzu Corporation) was used as the average particle size.

[0076] (3) Determination of the amount of A...

manufacture example 1

[0117] Production example 1 (polyethylene terephthalate P1)

manufacture example 2

[0118] 100 parts of dimethyl terephthalate, 60 parts of ethylene glycol, and 0.09 part of magnesium acetate tetrahydrate were added to the reactor, and methanol was distilled off while heating to raise the temperature to carry out transesterification. It took 4 hours from the start of the reaction to raise the temperature to 230° C., and the transesterification reaction was substantially completed. Next, 0.04 part of ethyl acid phosphate glycol slurry, 0.03 part of antimony trioxide, and 0.01 part of silica particles having an average particle diameter of 1.5 μm were added. Then, it took 100 minutes to bring the temperature to 280° C. and the pressure to 15 mmHg, after which the pressure was gradually lowered to finally 0.3 mmHg. After 4 hours, the inside of the system returned to normal pressure, and polyethylene terephthalate P1 with an intrinsic viscosity of 0.61 was obtained. Production example 2 (polyethylene terephthalate P2)

[0119] Adding 0.1 part of silica particle...

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PUM

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Abstract

A mold release film comprising a coating layer and a mold release layer provided in this order on one surface of a polyester film which is stretched at least in the monoaxial direction, the coating layer comprising an aluminum chelate compound and/or a zirconium chelate compound, the mold release film having a critical destruction load (CDC) on the mold release side of 40 mN or higher, and the quantity of an oligomer extracted with dimethylformamide from the surface of the mold release layer after treatment at 180 DEG for 10 minutes being 1.5 mg/m2 or less. In the mold release film, the quantity of an oligomer precipitated therefrom is quite small and the adhesion of the mold release layer to a coating film is good.

Description

technical field [0001] The present invention relates to a mold release film, and more particularly relates to an LCD member with an extremely small amount of oligomer precipitation, which is suitable for use in the production of LCD members such as polarizing plates and retardation plates used in liquid crystal displays (hereinafter, sometimes abbreviated as LCD), It is suitable for the manufacture of plasma display panel (hereinafter, sometimes abbreviated as PDP) components, organic electroluminescent (hereinafter, sometimes abbreviated as organic EL) components, etc., and various display components. It is also suitable for various optical Release film for applications, etc. Background technique [0002] So far, release films based on polyester films have been used in the manufacture of liquid crystal polarizing plates, retardation plate members, PDP members, organic electroluminescent members, various display members, etc. optical applications, etc. As problems in the u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/36B32B27/00
Inventor 井崎公裕
Owner MITSUBISHI POLYESTER FILM
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