Base for masking tape for coating and masking tape for coating

Abstract

A base (1) for a masking tape for coating, which is made of a polyolefin resin film having an elastic modulus of 15 to 55 kgf / mm<2>, both surfaces of the film being modified by irradiation with corona or the like; a base (2) as set forth above, wherein a layer of a modified resin such as a polyester-urethane resin or the like is formed on at least one surface thereof; and a masking tape (3) for coating, produced by forming a layer of a pressure-sensitive adhesive comprising a thermoplastic saturated block polymer, a thermoplastic unsaturated block polymer and a tackifier or a layer of a cross-linked acrylic pressure-sensitive adhesive on one surface of the base (1). The polyolefin resin of the base (1) is a polypropylene-polyethylene block copolymer or the like, while the acrylic pressure-sensitive adhesive of the tape (3) is one containing a chlorinated polypropylene resin or the like. The use of the above base enables the production of a masking tape which is excellent in follow-up properties, gives a clear parting line, and can be peeled off without leaving any residue.

Description

technical field [0001] The present invention relates to a protective tape used in painting (hereinafter referred to as paint protective tape), which relates to vehicles, automobiles, etc., which can be easily peeled off and can form beautiful dividing lines after the paint is hardened and the tape is peeled off after baking the paint. , Protective tape for paint masking that does not pollute the painted surface and has excellent sticking workability. Background technique [0002] On the outer panels and bumpers of vehicles such as cars, buses, and trains, various combinations of colors are designed based on functions and conceptual patterns. At this time, in order to separate the paint and protect the parts that are not painted, a paint protection tape is used. [0003] The properties required for the paint protective tape are as follows: good adhesion to the curved surface of the painted body with complex shapes, good accuracy of the boundary line after painting and baking...

AI Technical Summary

Problems solved by technology

For example, when crepe paper is used, the impregnated resin used to improve the paper quality is immersed in the painted surface under the condition of paint baking, or it lacks the ability to follow complex curved surfaces, and the boundary line is poor.

When polyester film is used, the position where the tape can be applied is limited due to poor surface followability

In the case of using soft vinyl chloride, although it is excellent as a substrate that improves the shortcomings of crepe paper and polyester film, after coating and baking the paint for painting, if it is peeled off, if If the temperature is as low as 5-10°C, the base material is easy to break, and the fragments fly and easily pollute the painted body

In addition, when polyolefin resin film is used, the adhesion of the paint is poor, the paint is peeled off, or the boundary line cannot be clearly displayed.

[0006] On the other hand, the above-mentioned known composition for forming the adhesive layer is mainly composed of natural rubber, so the durability against heat is insufficient.

Therefore, the bonded portion after baking is easily contaminated, and the stability of the product is not sufficient, and the sticking workability in winter and the tape peelability after baking are also poor, and there may be a disadvantage that the adhesive layer is peeled off.

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