Low crystallizability polypropylene sheet

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...

Reexamination Certificate

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Details

C526S348100, C264S479000, C264S544000, C264S556000, C264S557000, C264S210100, C264S331150, C428S220000, C428S339000

Reexamination Certificate

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06943229

ABSTRACT:
A low crystallizability polypropylene sheet which has an average spherulite radius between 0.1 μm and 4 μm, an average number of spherulites of 600/mm2or less in a sheet cross section, a solid density of 0.895 g/cm3or less, a fusion enthalpy H of less than 90 J/g at the highest endothermic peak of the differential scanning calorimetry (DSC) curve, a degree of gloss of 90% or higher on at least one side and shows an exothermic peak of 1 J/g or higher at the low temperature side of said highest endothermic peak and a thickness of 50 μm or more.

REFERENCES:
patent: 614748 (1994-09-01), None
patent: 803340 (1997-10-01), None
patent: 61-130018 (1986-06-01), None
patent: 63-60726 (1988-03-01), None
patent: 10-1548 (1998-01-01), None
patent: 2000-246785 (2000-09-01), None
patent: 2001-30362 (2001-02-01), None

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