Multi-layer film
AssigneeSabic Global Technologies B.V.
InventorsLing Fan, Jana Hrachova, Bart Van Den Esschert, Jun Zhou, Feng Gong
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Abstract
A multi-layer film for seal-peel applications, an article comprising said film and the use of said film a disclosed. The multi-layer film for seal-peel application comprising at least two layers, namely a cover layer and a seal layer, whereby the seal layer comprises between 25 and 80 wt. % of EVA and between 20 and 75 wt. % of LLDPE based on the total weight of the layer.
Claims11
A multi-layer film for seal-peel application comprising at least two layers, namely a cover layer and a seal layer,
- wherein the cover layer comprises a first low density polyethylene (LDPE) cover layer and a second cover layer,
- the first LDPE cover layer is arranged on and in contact with the seal layer,
- the second cover layer is a blend of liner low density polyethylene (LLDPE) and a LDPE, and
- the second cover layer is arranged on and in contact with the first LDPE cover layer;
- and
- wherein the seal layer comprises between 30 and 75 wt. % of ethylene vinyl acetate (EVA) and between 25 and 70 wt. % of linear low density polyethylene (LLDPE) based on the total weight of the seal layer,
- the EVA is a copolymer of ethylene and vinyl acetate and the vinyl acetate content of the EVA is between 35 wt. % and 40 wt. % based on the total weight of the EVA,
- the melt flow index of the EVA ranges from 2 to 20 g/10 min, and
- the LLDPE has a density between 0.900 to 0.935 g/cm3 and a melt flow index ranging from 1 to 10 g/10 min.
A multi-layer film for seal-peel application comprising a cover layer and a seal layer, wherein the seal layer comprises between 25 and 80 wt. % of ethylene vinyl acetate (EVA) and between 20 and 75 wt. % of linear low density polyethylene (LLDPE) based on the total weight of the seal layer, and
- wherein
- the cover layer comprises a first low density polyethylene (LDPE) cover layer and a second cover layer, wherein the first LDPE cover layer is arranged on and in contact with the seal layer, wherein the second cover layer is a blend of LLDPE and a LDPE, wherein the second cover layer is arranged on and in contact with the first LDPE cover layer, and
- the film has a peel strength on polyethylene terephthalate (PET) of between 1 and 20 N/15 mm, measured according to ASTM F88 method C with a strip width of 15 mm, a separation rate of 200 mm/min, and a sealing temperature of 80° C.
Dependencies are inferred from the claim text.