Aliphatic polyester composition, films and multilayer films produced therefrom
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United States of America Patent
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Issued Date -
Dec 29, 2005
app pub date -
May 16, 2005
filing date -
May 18, 2004
priority date (Note) -
Abandoned
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Abstract
Disclosed are an aliphatic polyester composition which comprises 98.about.35% by weight of an aliphatic polyester copolymer (copolycondensate) (A) having a melting point (Tm) of 80.about.120.degree. C., a crystallizing temperature (Tc) of 35.about.75.degree. C., and a difference of (T.sub.m)-(T.sub.C) within the range of 35.about.55.degree. C. and comprised of (a1) an aliphatic or alicyclic dicarboxylic acid component, (a2) an aliphatic or alicyclic dihydroxyl compound component, and (a3) a difunctional aliphatic hydroxycarboxylic acid component; and 2.about.65% by weight of an aliphatic and aromatic polyester (B) comprised of an acid component of (i) 20.about.95 mol % of (b1) an aliphatic or alicyclic dicarboxylic acid component and (ii) 80.about.5 mol % of (b2) an aromatic carboxylic acid and a dihydroxyl component of (b3) an aliphatic and alicyclic dihydroxyl compound, films and multilayer films produced therefrom. The films and multilayer films are excellent in transparency, impact-resistance and piercing-resisting property and suitable for packaging use.
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