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US 2026/0109105 A1Published application
Method for producing stretched film
AssigneeKaneka Corporation
InventorsFuminobu KITAYAMA, Arihiro SAITO, Tetsuo OKURA, Toshifumi MATSUMIYA, Masahide SHINOBU
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Abstract
In a method for producing a stretched film by stretching a film web containing a poly(3-hydroxybutyrate) resin, the film web is stretched under conditions where a film surface maximum temperature is within a temperature range represented by the following inequality: Tm-60≤film surface maximum temperature (° C.)≤Tm-5, where the Tm is a melting point (° C.) of the film web.
Claims21
A method for producing a stretched film by stretching a film web containing a poly(3-hydroxybutyrate) resin, the method comprising the step of:
- stretching the film web under conditions where a film surface maximum temperature is within a temperature range represented by the following inequality (1):
- Tm
- -
- 60
- ≤
- film
-
- surface
-
- maximum
-
- temperature
-
- (
- °C
- )
- ≤
- Tm
- -
- 5
- ,
- (
- 1
- )
- wherein the Tm is a melting point (° C.) of the film web, and
- the film web has a crystallinity of more than 40% to 80%.
23 more elements
(canceled)
Dependencies are inferred from the claim text.