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Multilayer acrylic resin film

A technology of acrylic resin and acrylic rubber, applied in the field of laminated molded products, which can solve the problems of decreased UV absorption characteristics, deterioration, and the effect of UV absorbers is not always satisfactory.

Inactive Publication Date: 2008-04-16
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is advantageous to use an acrylic resin film containing a UV absorber, but this may cause contamination of equipment or deterioration of the work environment, or due to evaporation or permeation of the UV absorber during the film formation process or molding process or over time. out, suffer from a decrease in UV absorbing characteristics
In order to solve these problems, JP-A-8-323934 and JP-A-10-45854 suggest the use of high molecular weight UV absorbers, but the effect of such UV absorbers is not always satisfactory

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] After mixing 80 parts of methacrylic resin pellets, 20 parts of acrylic rubber granules and 0.1 part of UV absorber (A) with a high-speed mixer (Super Mixer), the mixture was melted and extruded at 240°C with a twin-screw extruder. The mixture was kneaded at a cylinder temperature to obtain resin composition pellets, which were used as a surface layer material.

[0039] After mixing 80 parts of methacrylic resin pellets, 20 parts of acrylic rubber pellets, and 0.9 parts of UV absorber (B) with a high-speed mixer, the mixture was melted and kneaded at a barrel temperature of 240°C with a twin-screw extruder mixture to obtain resin composition pellets, which are used as interlayer material.

[0040] The surface layer material and the middle layer material obtained above were respectively fed to a single-screw extruder with a diameter of 65 mm (manufactured by Toshiba Machine Co., Ltd.) and a single-screw extruder with a diameter of 45 mm (manufactured by Toshiba Machine C...

Embodiment 2

[0046] After mixing 80 parts of methacrylic resin pellets and 20 parts of acrylic rubber pellets with a high-speed mixer without adding any UV absorber, the mixture was melted and the mixture was kneaded with a twin-screw extruder at a barrel temperature of 240° C. to A resin composition pellet was obtained, which was used as a surface layer material.

[0047] After mixing 80 parts of methacrylic resin pellets, 20 parts of acrylic resin pellets, and 2.0 parts of UV absorber (B) with a high-speed mixer, the mixture was melted and kneaded at a barrel temperature of 240°C with a twin-screw extruder mixture to obtain resin composition pellets, which are used as interlayer material.

[0048] The surface layer material and the middle layer material obtained above were respectively fed to a single-screw extruder with a diameter of 65 mm (manufactured by Toshiba Machine Co., Ltd.) and a single-screw extruder with a diameter of 45 mm (manufactured by Toshiba Machine Co. ., Ltd.) to me...

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Abstract

A multilayer acrylic resin film having two surface layers made of an acrylic resin composition consisting of from 20 to 100% by weight of a methacrylic resin and from 0 to 80% by weight of acrylic rubber particles which contains a UV absorber in an amount of 0.2 part by weight or less per 100 parts by weight of the acrylic resin composition, and at least one intermediate layer made of an acrylic resin composition consisting of from 20 to 100% by weight of a methacrylic resin and from 0 to 80% by weight of acrylic rubber particles which contains a UV absorber in an amount of at least 0.3 part by weight per 100 parts by weight of the acrylic resin composition.

Description

technical field [0001] The present invention relates to multilayer acrylic resin films having UV absorbing properties. The invention also relates to laminate moldings comprising a multilayer acrylic resin film. Background technique [0002] Molded resin articles produced by injection molding are widely used as interiors of automobiles and exteriors of home appliances. To decorate these molded resin products, for example, a simultaneous injection molding-lamination method is employed. Examples of the simultaneous injection molding-lamination method include: a method comprising the steps of inserting a decorated resin film into an injection mold without preforming the film, injecting molten resin into the mold, and Laminating said resin film with decoration on a molded resin product while forming a molded resin product by injection molding; a method comprising the steps of preforming the resin film with decoration after preforming the film by vacuum forming or air pressure f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/28B32B25/14C08J5/18
CPCB32B27/18B29C45/14811B32B27/30Y10T428/24802C08J5/18
Inventor 佃阳介
Owner SUMITOMO CHEM CO LTD
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