US 2026/0265472 A1Published application

Stretched film

AssigneeKaneka Corporation

InventorsNaoya Kamikariya, Fuminobu Kitayama, Masahide Shinobu, Arihiro Saito

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Abstract

A stretched film contains a resin component containing a poly(3-hydroxyalkanoate) resin (A) and a polylactic acid resin (B). The poly(3-hydroxyalkanoate) resin (A) contains a copolymer (A1) of 3-hydroxybutyrate units and other hydroxyalkanoate units, and a poly(3-hydroxybutyrate) resin (A2). In the stretched film, the proportion of the resin component is more than 99.6 wt %, and the inequality (Ma÷104)×Wb≥1600 is satisfied, where Ma is the weight-average molecular weight of the totality of the poly(3-hydroxyalkanoate) resin (A), and Wb is the percentage weight proportion of the polylactic acid resin (B) with respect to the total amount of the poly(3-hydroxyalkanoate) resin (A) and the polylactic acid resin (B).

Claims13

Dependent claims

A stretched film comprising a resin component, wherein:

the resin component comprises a poly(3-hydroxyalkanoate) resin (A) and a polylactic acid resin (B),
the poly(3-hydroxyalkanoate) resin (A) comprises a copolymer (A1) of 3-hydroxybutyrate units and other hydroxyalkanoate units, and a poly(3-hydroxybutyrate) resin (A2),
a proportion of the resin component in the stretched film is more than 99.6 wt %, and
the resin component satisfies the following inequality (I):
inequality
⁢
(
I
)
:
(
Ma
÷
10
4
)
×
Wb
≧
1600
,
wherein Ma is a weight-average molecular weight of a totality of the poly(3-hydroxyalkanoate) resin (A), and Wb is a percentage weight proportion (wt %) of the polylactic acid resin (B) based on a total amount of the poly(3-hydroxyalkanoate) resin (A) and the polylactic acid resin (B).

19 more elements

Dependencies are inferred from the claim text.