Stock material or miscellaneous articles – Composite – Of polyester
Patent
1996-02-01
1996-11-26
Acquah, Samuel A.
Stock material or miscellaneous articles
Composite
Of polyester
528361, 525450, 428 358, 428364, B32B 2706
Patent
active
055783821
ABSTRACT:
A supported or cast film of a polyhydroxyalkanoate polymer, such as a polyhydroxybutyrate/valerate polymer, can be prepared by applying a layer of molten polymer to a cool (typically 4.degree. to 20.degree. C.) surface not substantially above the glass transition temperature of the polymer, so as to form a solid, glassy film with a high density of nucleation sites; subsequently the temperature of the film so formed is raised, for example to 40.degree. C. or more, towards the optimum temperature for growth of the polymer's spherulites effectively separating the film formation
ucleation step from the crystallisation step (growth of spherulites around the nucleation sites). Smaller crystallites are formed, and the film has improved barrier properties.
REFERENCES:
patent: 4391766 (1983-07-01), Barham et al.
patent: 4427614 (1984-01-01), Barham et al.
patent: 4537738 (1985-08-01), Holmes
patent: 4880592 (1989-11-01), Martini et al.
patent: 5191037 (1993-03-01), Doi et al.
patent: 5227415 (1993-07-01), Masuda et al.
patent: 5231148 (1993-07-01), Kleinke et al.
patent: 5281649 (1994-07-01), Organ et al.
patent: 5310865 (1994-05-01), Enomoto et al.
patent: 5428126 (1995-06-01), Kashima et al.
patent: 5437918 (1995-08-01), Taniguchi et al.
Acquah Samuel A.
Zeneca Limited
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