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/mm2 or less in a sheet cross section, a solid density of 0.895 g/cm3 or less, a fusion enthalpy H of less than 90 J/g at the highest endothermic peak of
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/mm2 or less in a sheet cross section, a solid density of 0.895 g/cm3 or 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.
대표청구항▼
1. A low crystallizability polypropylene sheet characterized in that it has an average spherulite radius between 0.1 μm and 4 μm, an average number of spherulites of 600/mm2 or less in a sheet cross section, a solid density of 0.895 g/cm3 or less, a fusion enthalpy H of less than 90 J/g at the highe
1. A low crystallizability polypropylene sheet characterized in that it has an average spherulite radius between 0.1 μm and 4 μm, an average number of spherulites of 600/mm2 or less in a sheet cross section, a solid density of 0.895 g/cm3 or less, a fusion enthalpy H of less than 90 J/g at the highest endothermic peak of the differential scanning calorimetry (DCS) 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.2. The low crystallizability polypropylene sheet according to claim 1, characterized in that its internal haze is not higher than (330t2?150t 20)%, where t is the thickness of the low crystallizability polypropylene sheet.3. The low crystallizability polypropylene sheet according to claim 1, characterized in that its tensile modulus is 1,500 MPa or less.4. The low crystallizability polypropylene sheet according to claim 1, comprising a material selected from the group consisting of homo polypropylene, random polypropylene, block polypropylene, and mixtures thereof.5. The low crystallizability polypropylene sheet according to claim 4, said material further comprising petroleum resin, terpene resin, or a combination thereof.6. The low crystallizability polypropylene sheet according to claim 2, characterized in that its tensile modulus is 1,500 MPa or less.7. The low crystallizability polypropylene sheet according to claim 2, comprising a material selected from the group consisting of homo polypropylene, random polypropylene, block polypropylene, and mixtures thereof.8. The low crystallizability polypropylene sheet according to claim 3, comprising a material selected from the group consisting of homo polypropylene, random polypropylene, block polypropylene, and mixtures thereof.9. The low crystallizability polypropylene sheet according to claim 6, comprising a material selected from the group consisting of homo polypropylene, random polypropylene, block polypropylene, and mixtures thereof.10. The low crystallizability polypropylene sheet according to claim 7, wherein said raw material further comprises petroleum resin, terpene resin, or a combination thereof.11. The low crystallizability polypropylene sheet according to claim 8, wherein said raw material further comprises petroleum resin, terpene resin, or a combination thereof.12. The low crystallizability polypropylene sheet according to claim 9, wherein said raw material further comprises petroleum resin, terpene resin, or a combination thereof.13. A method of manufacturing a shaped article comprising thermoforming the sheet of claim 1 into said shaped article.14. A shaped article manufactured by the method of claim 13.
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이 특허를 인용한 특허 (2)
Takegami, Ryuta, Film and method for producing film.
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