Copolyester film and a hot melt adhesive comprising said film

Details Copolyester film and a hot melt adhesive comprising said film Copolyester film and a hot melt adhesive comprising said film

1985-05-03

1987-04-21

Lieberman, Allan M.

Stock material or miscellaneous articles

Structurally defined web or sheet

Physical dimension specified

428480, B32B 2706, B32B 2736

Patent

active

046596151

ABSTRACT:
A copolyester film comprising: (a) a copolyester which comprises, as a dicarboxylic acid component, 80 to 97 mole percent of terephthalic acid and 3 to 20 mole percent of isophthalic acid and, as a diol component, 60 to 85 mole percent of 1,4-butanediol and 15 to 40 mole percent of diethylene glycol, and said copolyester having a reduced viscosity in the range of 0.8 to 1.4 dl/g and a melting point in the range of 160.degree. to 200.degree. C.; and said film having (b) a heat of crystal fusion in the range of 5 to 10 cal/g, (c) a haze value in the range of 5 to 35 percent, and (d) an initial Young's modulus in the range of 3.times.10.sup.3 kg/cm.sup.2 to 30.times.10.sup.3 kg/cm.sup.2. A hot melt adhesive comprising said film is also provided. This hot melt adhesive has excellent high speed bonding characteristics, durability and high bond strength with respect to substrates.

REFERENCES:
patent: 4299934 (1981-11-01), Petke et al.
patent: 4363853 (1982-12-01), Imamura et al.
patent: 4500575 (1985-02-01), Taira et al.
Patents Abstracts of Japan, vol. 6, No. 29 (M-113) (907), 2/20/82; & JP-A-56 146 723 (Kuraray K.K.) 14-11-1981, Abstract.
Patents Abstracts of Japan, vol. 6, No. 208 (C-130) (1086), 10/20/82; & JP-A-57 115 475 (Teijin K.K.) 17-07-1982, Abstract.

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