Composite base material and adhesive film
First Claim
1. A film-like composite base material comprising at least a first resin film with a breaking elongation in the lengthwise direction of 300 to 1500% and a breaking strength of at least 2 kg/12 mm, and a second resin film with a lower breaking elongation and a higher flexural modulus than said first resin film, characterized in that said second resin film breaks before said first resin film when stretched.
1 Assignment
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Accused Products
Abstract
To provide an adhesive film that can be easily released leaving substantially no adhesive residue and without damaging the adherend surface when released from an adherend. A base material comprising at least a first resin film with a breaking elongation in the lengthwise direction of 300 to 1500% and a breaking strength of at least 2 kg/12 mm, and a second resin film with a lower breaking elongation and a higher flexural modulus than the first resin film is used. The second resin film can break before the first resin film when the base material is stretched.
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Citations
5 Claims
- 1. A film-like composite base material comprising at least a first resin film with a breaking elongation in the lengthwise direction of 300 to 1500% and a breaking strength of at least 2 kg/12 mm, and a second resin film with a lower breaking elongation and a higher flexural modulus than said first resin film, characterized in that said second resin film breaks before said first resin film when stretched.
- 4. An adhesive film characterized by comprising a film-like composite base material comprising at least a first resin film with a breaking elongation in the lengthwise direction of 300 to 1500% and a breaking strength of at least 2 kg/12 mm, and a second resin film with a lower breaking elongation and a higher flexural modulus than said first resin film, and an adhesive layer formed on at least one side of said composite base material.
Specification