Polyester resin for heat-shrinkable film, heat-shrinkable film, heat-shrinkable label, and packaged product

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 12134679
APP PUB NO 20220049049A1
SERIAL NO

17276120

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Abstract

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The invention provides a polyester resin for heat-shrinkable film which contains terephthalic acid as a main component of a dicarboxylic acid component, contains ethylene glycol as a main component of a diol component, and contains from 18 to 32% by mole of neopentyl glycol and from 7 to 15% by mole of diethylene glycol when a total amount of the whole diol component in total polyester resin components is taken as 100% by mole. The polyester resin has (i) an intrinsic viscosity (IV) of not less than 0.65 and less than 0.70 dl/g, (ii) a carboxyl end group concentration (AV) of 8-25 eq/t, (iii) a color b value of 1.0-8.0 in an L*a*b* color system, and (iv) aluminum and phosphorus atoms, wherein the aluminum atoms are present in an amount of 15-40 ppm, and wherein the molar ratio of the phosphorus atoms to the aluminum atoms is 1.8-2.6.

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Patent Owner(s)

Patent OwnerAddress
TOYOBO CO LTD13-1 UMEDA 1-CHOME KITA-KU OSAKA-SHI OSAKA 5300001

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Haruta, Masayuki Tsuruga, JP 86 438
Ishimaru, Shintaro Tsuruga, JP 28 100
Nakagawa, Satoru Tsuruga, JP 28 169
Ohashi, Hideto Tsuruga, JP 13 157
Uotani, Kosuke Tsuruga, JP 7 5

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