Flexible laminate with excellent sealing performance

Abstract

The present invention relates to a laminate film comprising a polyethylene sealant film including at least an outer layer O, an inner layer I and a core layer C, the core layer C being present between the outer layer O and the inner layer I, wherein the inner layer I has a compressive strength of 915 to 925 kg / m 3 and melt flow rate (MFR) of 0.5 to 3.0 g / 10 min as determined by ISO 1133 2 %, wherein the weight percent is based on the total weight of the inner layer composition; and The present invention relates to a substrate film laminated to a polyethylene sealant film, wherein the substrate film comprises a polyester polymer selected from the group consisting of polyethylene terephthalate, polybutylene terephthalate and polytrimethylene terephthalate, and mixtures thereof, and the seal initiation temperature SIT (5N) of the laminate film is less than 100°C, determined at the inner layer of the polyethylene sealant film according to ASTM F2029, ASTM F88. The present invention further relates to an article comprising said laminate film, and the use of the laminate film for packaging an article. Furthermore, the present invention relates to the use of the polyethylene sealant film to improve the sealing performance of a substrate film comprising a polyester polymer.

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