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Surface protective sheet

A surface protection film, plastic film technology, applied in synthetic resin layered products, layered products, chemical instruments and methods, etc., can solve the problems of yellowing color, content increase, color change, etc., to achieve less yellowing, The effect of maintaining the same color and good UV protection

Inactive Publication Date: 2009-07-29
KIMOTO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the image or the background color is white or light, the color may change due to the action of the ultraviolet absorber
In particular, when used as a surface protection film for a display that should absorb light in a predetermined wavelength region with high precision in order to prevent the components contained in it from being activated by light, as in electronic paper, the content of the ultraviolet absorber in the ultraviolet protection layer will decrease. increase, and produce problems such as increased yellowing and significant changes in color

Method used

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  • Surface protective sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] As a transparent plastic film, in b * On one side of a polyethylene terephthalate film with a value of 1.0 and a thickness of 188 μm, a coating solution for an ultraviolet protection layer of the following formulation was applied, dried, and irradiated with ultraviolet rays by a high-pressure mercury lamp to form a 4 μm layer. Thick anti-ultraviolet layer, makes the surface protective film of embodiment 1.

[0043]

[0044] ・Ionizing radiation curable resin composition (solid content 100%) 15 parts

[0045] (DIABEAM UR6530: manufactured by MITSUBISHI RAYON Co., Ltd.)

[0046] ·Ultraviolet absorber (formula weight 315.8) 1.2 parts

[0047]

[0048] (KEMISORB72: manufactured by CHEMIPRO Chemical Co., Ltd.)

[0049] ·Ultraviolet absorber (formula weight 323.4) 0.9 parts

[0050]

[0051] (KEMISORB79: manufactured by CHEMIPRO Chemical Co., Ltd.)

[0052] ・Spherical microparticles (silicon dioxide) (average particle size: 6 μm) 0.15 parts

[0053] (HIPRESICA TS-N...

Embodiment 2

[0064] The surface protection film of Example 2 was produced in the same manner as in Example 1 except that the coating liquid for an ultraviolet protection layer of Example 1 was changed to the coating liquid for an ultraviolet protection layer of the following formulation.

[0065]

[0066] ・Ionizing radiation curable resin composition (solid content 100%) 15 parts

[0067] (DIABEAM UR6530: manufactured by MITSUBISHI RAYON Co., Ltd.)

[0068] ·Ultraviolet absorber (formula weight 315.8) 1.2 parts

[0069]

[0070] (KEMISORB72: manufactured by CHEMIPRO Chemical Co., Ltd.)

[0071] ·Ultraviolet absorber (formula weight 323.4) 0.9 parts

[0072]

[0073] (KEMISORB72: manufactured by CHEMIPRO Chemical Co., Ltd.)

[0074] · Spherical microparticles (cross-linked acrylic resin) 0.25 parts

[0075] (average particle size 5 μm) (MB20X-5: manufactured by Sekisui Chemical Industry Co., Ltd.)

[0076] ・Organopolysiloxane (solid content 100%) 0.1 parts

[0077] (BYK307: BYK-...

Embodiment 3

[0086] Using the coating solution for the ultraviolet protection layer of Example 1, without adding organic polymolecular silicon ether, and changing the addition amount of the ionizing radiation-curable resin composition to 15.1 parts, except that, the same as in Example 1, the preparation Became the surface protection film of embodiment 3.

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Abstract

Disclosed is a surface protective sheet with less tinge of yellow which is excellent in ultraviolet protection. Specifically disclosed is a surface protective sheet having an ultraviolet protective layer on at least one side of a plastic film. The ultraviolet protective layer is composed of an ultraviolet absorbent, an ionizing radiation curable resin composition and spherical particles having an average particle size of 1-20 mum, and the spherical particles are contained in the ultraviolet protective layer in an amount of 0.4-3 weight%. Preferably, the ultraviolet protective layer further contains 0.01-1 weight% of organopolysiloxane.

Description

technical field [0001] The present invention relates to a surface protection film suitable for protecting the surface of signs boards, advertisements, signboards, signs, posters, door plates, signs and other display objects. Background technique [0002] For a long time, in order to protect the surface of sign boards, advertisements, signboards, signs and other display objects, surface protection films have been used. As such a surface protective film, it is required to have the following properties, that is, the performance that the surface is not easily damaged (hereinafter referred to as scratch resistance (hardcoat)), and the image, etc., as the content represented by the display object is not affected by ultraviolet rays or the like. Discoloration or fading performance (hereinafter referred to as UV protection performance). [0003] As a technique for meeting such demands, a surface protection film having an ultraviolet-ray blocking layer comprising an ultraviolet-cura...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/18B32B27/16B32B27/20
Inventor 北原庆一斋藤正登小山益生木村刚久
Owner KIMOTO CO LTD
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