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Protective film for automotive wheel

A technology for protecting films and wheels, applied in the directions of wheels, film/flaky adhesives, wheel cover discs, etc., can solve the problem of not being able to exert the anti-rust effect, etc., to prevent scratches, prevent rust, and easily peel off. Effect

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, in the case of using the protective film of Patent Document 1, water or salt water infiltrates through the cut formed for releasing the pressure, causing a problem that a sufficient antirust effect cannot be exhibited.
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

[0115] (Preparation of (meth)acrylic polymer)

[0116] In a four-neck flask with a stirring blade, a thermometer, a nitrogen inlet tube, and a condenser, add 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 of 2-hydroxyethyl acrylate, 0.2 parts by weight of 2,2'-azobisisobutyronitrile and 200 parts by weight of ethyl acetate as a polymerization initiator, introduce nitrogen while slowly stirring, and keep the liquid temperature in the flask Polymerization was carried out at about 65° C. for about 6 hours to prepare a (meth)acrylic polymer solution (35% by weight). The glass transition temperature (Tg) of the (meth)acrylic polymer was -29°C.

[0117] (Preparation of binder solution)

[0118] The (meth)acrylic polymer solution (35% by weight) was diluted to 20% by weight with ethyl acetate, and 0.6 wt. Parts of isocyanate compound (coronet L, manufactured by Nippon Polyureth...

Embodiment 2

[0122] Except for using the (meth)acrylic adhesive solution (B) obtained by blending 0.8 parts by weight of the isocyanate compound (Coronet L, manufactured by Nippon Polyurethane Industry Co., Ltd.), the same operation as in Example 1 was performed to produce an automobile Protective film for wheels.

Embodiment 3

[0124] Except for using the (meth)acrylic adhesive solution (C) obtained by blending 1.0 parts by weight of the isocyanate compound (Coronet L, manufactured by Nippon Polyurethane Industry Co., Ltd.), the same operation as in Example 1 was performed to produce an automobile Protective film for wheels.

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Abstract

A protective film for automotive wheels which has the following excellent performances. The protective film can sufficiently prevent the surface of a wheel from being damaged or fouled during the period to delivery, and can prevent the disc brake located inside the wheel from rusting. When the protective film is applied to a wheel and thereafter stripped therefrom at a high speed, the protective film can be easily stripped off and be prevented from leaving an adhesive residue. Even when a plurality of sheets of the protective film have been superposed, this protective film can be easily stripped off. The protective film for automotive wheels comprises a base layer and a pressure-sensitive adhesive layer, and is characterized in that when the pressure-sensitive adhesive layer of the protective film is adhered to the back surface of the base layer of the protective film and this protective film in the adhered state is stored at 50 C for 24 hours, then the adhesive force in application to the back surface is 0.1-2 N / 20 mm at each of pulling rates of 0.3 m / min., 10 m / min., and 30 m / min.

Description

technical field [0001] The present invention relates to a protective film for automobile wheels. Background technique [0002] Conventionally, when automobile wheels such as aluminum wheels are transported by ships, for example, due to humidity changes in the ship, water seeps into the inner sides of the automobile wheels from the outside, resulting in disk discs on the inner side of the wheels. In order to prevent problems such as rust on the brakes, a protective film is attached to the wheel surface. [0003] The protective film used for car wheels needs to be kept in a state of sticking until the car is delivered, and there are requirements such as: when the protective film is peeled off after delivery, it can be easily peeled off, and no adhesive residue is left on the wheel surface when peeled off. [0004] In addition, the protective film (adhesive tape) is stored as a roll body or in a state where a plurality of protective films including a base material layer and an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B7/12B32B27/30B60B7/02C09J7/02C09J133/06
CPCB60B7/06B60J11/10C09J7/0217B32B15/08B60B7/00B32B7/06C09J2201/622C09J2423/046B32B7/12C09J7/385C09J2301/312Y10T428/26Y10T428/264Y10T428/266Y10T428/28Y10T428/2839Y10T428/2891
Inventor 花木一康齐藤友纪山中刚
Owner NITTO DENKO CORP