Material für einen Druckempfindlichen Klebstoff, Verfahren zur Herstellung eines Druckempfindlichen Klebstoffs, Druckempfindlicher Klebstoff, Mehrschichtiger Film und Verpackung

Details

Veröffentlichungs-Nr.

EP3940036

Aktenzeichen

EP21184411

Anmeldetag

8. Juli 2021

Veröffentlichung

3. August 2022

Rechtsraum

EP

IPC

C09J11/08C09J7/38C08F8/04C08F297/02C08F297/04

Abstract

Problem to be solved: Provided is a material for a pressure-sensitive adhesive which has a high adhesive strength and is capable of forming a pressure-sensitive adhesive layer excellent in film appearance. Solution: The material for a pressure-sensitive adhesive contains composition C in a particulate form including thermoplastic elastomer A, and composition F in a particulate form including thermoplastic elastomer D and tackifier E, wherein the condition (2) is satisfied, an adhesive strength of the material for a pressure-sensitive adhesive is larger than that of the composition C and the composition F, wherein x represents a mass ratio (thermoplastic elastomer(s) / thermoplastic elastomer(s) + tackifier(s)) of the material for a pressure-sensitive adhesive; α represents a mass ratio (thermoplastic elastomer(s) / thermoplastic elastomer(s) + tackifier(s)) of the composition C; and β represents a mass ratio (thermoplastic elastomer(s) / thermoplastic elastomer(s) + tackifier(s)) of the composition F, and the material for a pressure-sensitive adhesive satisfies the expression (1) and the condition (13): β < x < α (1); <condition (2)> a ratio of the total mass of the tackifier(s) to the total mass of the thermoplastic elastomer(s) in the composition F is more than 1.5 and 3.0 or less; <condition (13)> a ratio of the MFR value of the composition F to the MFR value of the composition C is 10 or more and 100 or less.

Anmelder

Firma

Asahi Kasei Kabushiki Kaisha

Land

🇯🇵 Japan

Fachgebiete