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Protective film for automotive wheel

A technology for protecting films and wheels, applied to wheels, film/sheet-like adhesives, wheel cover plates, etc., to prevent cracking, glue residue, and rust

Inactive Publication Date: 2012-04-11
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the antirust films for automobile brake discs disclosed in Patent Documents 2 to 8 cannot actually meet the above requirements.

Method used

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  • Protective film for automotive wheel
  • Protective film for automotive wheel
  • Protective film for automotive wheel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0112] (Preparation of (meth)acrylic polymer)

[0113] In a four-necked flask with a stirring blade, a thermometer, a nitrogen introduction tube, and a condenser, 30 parts by weight of 2-ethylhexyl acrylate, 70 parts by weight of ethyl acrylate, 5 parts by weight of methyl methacrylate, 4 parts by weight of parts by weight of 2-hydroxyethyl acrylate, 0.2 parts by weight of 2,2'-azobisisobutyronitrile as a polymerization initiator, and 200 parts by weight of ethyl acetate, introduce nitrogen gas while stirring slowly, and keep the liquid temperature in the flask A (meth)acrylic polymer solution (35% by weight) was prepared by carrying out a polymerization reaction at about 65°C for about 6 hours. The glass transition temperature (Tg) of the (meth)acrylic polymer was -29°C.

[0114] (Preparation of binder solution)

[0115] The (meth)acrylic polymer solution (35 wt %) was diluted to 20 wt % with ethyl acetate, and 0.6 wt. Parts of isocyanate-based compound (Corotate L, manufa...

Embodiment 2

[0119] An automobile was produced in the same manner as in Example 1, except that the (meth)acrylic pressure-sensitive adhesive solution (B) obtained by blending 0.8 parts by weight of the isocyanate-based compound (Corotate L, manufactured by Nippon Polyurethane Industry Co., Ltd.) was used. Protective film for wheels.

Embodiment 3

[0121] An automobile was produced in the same manner as in Example 1, except that a (meth)acrylic pressure-sensitive adhesive solution (C) obtained by blending 1.0 parts by weight of the isocyanate-based compound (Corotate L, manufactured by Nippon Polyurethane Industry Co., Ltd.) was used. Protective film for wheels.

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Abstract

A protective film for automotive wheels which comprises a base layer and a pressure-sensitive adhesive layer, characterized in that the protective film has a trouser tear strength in the machine direction (MD) of 3 N or higher and that the protective film has adhesive forces (adherend, a panel coated with acrylic clear coating; after 48-hour standing at 23 C and 50% RH) of 4.9 N / 25 mm or higher at a pulling rate of 0.3 m / min. and of 19.6 N / 25 mm or lower at a pulling rate of 30 m / min.

Description

technical field [0001] The present invention relates to a protective film for automobile wheels. Background technique [0002] Conventionally, when an automobile wheel such as an aluminum wheel is transported by a ship, for example, when the automobile is transported by a ship, water seeps into the inside of the automobile wheel from the outside due to a change in the humidity in the ship, and thus a disc type on the inner surface side of the wheel occurs. In order to prevent the occurrence of rust on the brakes, a protective film is attached to the surface of the wheel. [0003] The protective film used for automobile wheels needs to remain attached until the car is delivered, and there are requirements such as the following: when the protective film is peeled off after delivery, it can be easily peeled off, and no glue residue is left on the wheel surface during peeling. [0004] In Patent Document 1, it is disclosed that a protective film is mounted on the outer side of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/02B60B7/02C09J133/06
CPCC08G18/6229B60B7/06C08G2170/40C08G18/794C08G18/8029B60B7/00C09J133/066C09J175/04C09J7/0217C08F220/18C09J2423/046C09J2201/622C09J7/385C08F220/1802C09J2301/312Y10T428/26Y10T428/264Y10T428/266Y10T428/28Y10T428/2848Y10T428/2878C08F220/1808C08F220/14C08F220/20
Inventor 花木一康齐藤友纪山中刚
Owner NITTO DENKO CORP
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