Composite film, layered film, and layered product using same
Provided are: a composite film having excellent low-temperature heat-sealing properties, excellent tight-sealing properties in conventional bags and at high filling speed, and excellent workability during layering of a function-imparting layer on a film surface; a layered film; and a layered product...
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Format: | Patent |
Sprache: | chi ; eng |
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Zusammenfassung: | Provided are: a composite film having excellent low-temperature heat-sealing properties, excellent tight-sealing properties in conventional bags and at high filling speed, and excellent workability during layering of a function-imparting layer on a film surface; a layered film; and a layered product using same. This composite film comprises at least two layers, which are a base layer (A) and a heat-sealing layer (B). The base layer (A) is made of a resin composition obtained by mixing 100 parts by mass of a propylene random copolymer (a1) and 1-10 parts by mass of high-density polyethylene (a2) having a melt flow rate of less than 10 g/10 minutes at 190 DEG C. The heat-seal layer (B) is made of a resin composition obtained by mixing 100 parts by mass of a propylene random copolymer (b1) with 1-20 parts by mass of high-density polyethylene (b2) having a melt flow rate of less than 10 g/10 minutes at 190 DEG C. The resin composition has a melting point of 120 DEG C or higher and an extrapolated melting initiati |
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