초록 ▼

The invention provides a packaging laminate which is heat sealable to polypropylene, high density polyethylene or linear low density polyethylene to provide a strong seal which is cleanly peelable at the heat seal interface under hand pressure. The laminate has at least two layers. A heat sealable s

The invention provides a packaging laminate which is heat sealable to polypropylene, high density polyethylene or linear low density polyethylene to provide a strong seal which is cleanly peelable at the heat seal interface under hand pressure. The laminate has at least two layers. A heat sealable surface layer is composed of a melt blend comprising between about 55 and 95 wt. % of a substantially linear polyolefin and between about 5 and about 45 wt. % of a polyolefin rubber. The second layer is a heat stable layer which is structurally stable at temperatures in excess of 350°F. or greater and which has sufficient thickness to provide structural stability during heat sealing.

대표청구항 ▼

A heat sealable packaging laminate closure member for a container having a closure surface selected from the group consisting of polypropylene, high density polyethylene or linear low density polyethylene, said closure member being capable of forming a strong, cleanly peelable heat seal with said co

A heat sealable packaging laminate closure member for a container having a closure surface selected from the group consisting of polypropylene, high density polyethylene or linear low density polyethylene, said closure member being capable of forming a strong, cleanly peelable heat seal with said container, said closure member comprising: (a) a thermoplastic heat sealable surface layer composed of a melt blend comprising between about 55 and about 95 wt. % of a substantially linear polyolefin and between about 5 and about 45 wt. % of a polyolefin thermoplastic elastomer; and (b) a heat stable second layer which is structurally stable during heat sealing at temperatures of about 350°F. or greater and having sufficient thickness to provide structural stability during heat sealing.