Process for preparing formed item of aliphatic polyester and formed item prepared by the process
OwnerShoji Obuchi, Tatsuya Kawaguchi +5inventors
InventorsShoji Obuchi, Tatsuya Kawaguchi, Tomoyuki Nakata, Takayuki Watanabe, Yasuhiro Kitahara, Kazuhiko Suzuki, Masanobu Ajioka
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Abstract
The invention provides an aliphatic polyester formed item having transparency and crystallinity in combination by crystallizing, in the course of or after processing, an aliphatic polyester composition comprising aliphatic polyester and one or more transparent nucleating agent selected from the group consisting of aliphatic carboxylic acid amide, aliphatic carboxylic acid salt, aliphatic alcohol and aliphatic carboxylic acid ester having a melting point of 40-300° C.
Claims26
A preparation process of an aliphatic polyester formed item having transparency and crystallinity in combination comprising processing an aliphatic polyester composition comprising aliphatic polyester which develops no crystallization in temperature drop from the melting point to the glass transition temperature at a velocity of 10° C./min, and one or more transparent nucleating agent selected from the group consisting of an aliphatic carboxylic acid amide, an aliphatic carboxylic acid salt, an aliphatic alcohol and an aliphatic carboxylic acid ester having a melting point of 40-300° C., and carrying out heat-treatment in the course of or after processing.
A preparation process of an aliphatic polyester formed item having transparency and crystallinity in combination comprising processing an aliphatic polyester composition comprising aliphatic polyester which generates crystal in temperature drop from the melting point to the glass transition temperature at a velocity of 10° C./min, and one or more transparent nucleating agent selected from the group consisting of an aliphatic carboxylic acid amide, an aliphatic carboxylic acid salt, an aliphatic alcohol and an aliphatic carboxylic acid ester having a melting point of 40-300° C.
A formed item of the aliphatic polyester comprising an aliphatic polyester and one or more transparent nucleating agents selected from the group consisting of an aliphatic carboxylic acid amide, an aliphatic carboxylic acid salt, an aliphatic alcohol and an aliphatic carboxylic acid ester having a melting point of 40-300° C., and having transparency and crystallinity in combination.
A process for using one or more compounds for a transparent nucleating agent of polylactic acid, the compounds being selected from the group consisting of ethylenebiscapramide, ethylenebislauramide, ethylenebisoleamide, m-xylylenebisstearamide and m-xylylenebis-12-hydroxystearamide.
A process for using one or more compounds for a transparent nucleating agent of a copolymer having a polylactic acid block and a polybutylene succinate block and/or a polybutylene succinate, the compounds being selected from the group consisting of palmitamide, steramide, erucamide, behenamide, ricinolamide, hydroxystearamide, N-oleylpalmitamide, N-stearylerucamide, ethylenebiscapramide, ethylenebislauramidem ethylenebisoleamide, m-xylylenebisstearamide, m-xylylenebis-12-hydroxystearamide, sodium oleate, sodium stearate, potassium stearate, zinc stearate, calcium montanate, ethylene glycol disteryl alcohol.
Dependencies are inferred from the claim text.