Extrusion coated can liner film
OwnerJan MORTIZ, Robert ERVOLINO +1inventors
InventorsJan MORTIZ, Robert ERVOLINO, Gerado RADA
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Abstract
Embodiments relate to a multilayer film for food packaging applications, the multilayer film having chemical resistance to products having low to high pH from about 1 pH to about 13 pH, the multilayer film comprising a base layer and a top layer; wherein the base layer comprises polyethylene terephthalate, and optionally polybutylene terephthalate; and the top layer comprises low density polyethylene; wherein the multilayer film optionally has a thickness of 80 G (20 μm) or less.
Claims22
A can liner comprising a laminated metal sheet comprising a tin-free metal sheet and a multilayer film comprising a base layer and a top layer;
- wherein the base layer comprises 60-99.99 wt % of polyethylene terephthalate, 20-40 wt % of polybutylene terephthalate and 0.01-1 wt % silica;
- and the top layer comprises 90-100 wt % low density polyethylene having a thickness of about 6 μm or less;
- wherein the multilayer film has a thickness of 80 G (20 μm) or less.
(canceled)
(canceled)
A can liner comprising a laminated metal sheet comprising a tin-free metal sheet and a multilayer film comprising a base layer, a primer layer and a top layer in this order;
- wherein the base layer comprises 90-99.99 wt % of polyethylene terephthalate and 0.01-1 wt % silica;
- the primer layer comprises polyethylenimine;
- and the top layer comprises 90-100 wt % low density polyethylene having a thickness of about 6 μm or less, wherein the multilayer film has a thickness of 80 G (20 μm) or less.
A can liner comprising a laminated metal sheet comprising a tin-free metal sheet and a multilayer film comprising a base layer, a primer layer and a top layer in this order;
- wherein the base layer comprises 60-99.99 wt % of polyethylene terephthalate, 20-40 wt % of polybutylene terephthalate and 0.01-1 wt % silica;
- the primer layer comprises polyethylenimine;
- and the top layer comprises 90-100 wt % low density polyethylene having a thickness of about 6 μm or less.
A can liner comprising a laminated metal sheet comprising a tin-free metal sheet and a multilayer film comprising a base layer, an intermediate layer and a top layer in this order;
- wherein the base layer comprises 90-99.99 wt % of polyethylene terephthalate and 0.01-1 wt % silica;
- the intermediate layer comprises 90-100 wt % of isophthalic acid modified polyethylene terephthalate;
- and the top layer comprises 90-100 wt % low density polyethylene having a thickness of about 6 μm or less.
A can liner comprising a laminated metal sheet comprising a tin-free metal sheet and a multilayer film comprising a base layer, an intermediate layer, a primer layer and a top layer in this order;
- wherein the base layer comprises 90-99.99 wt % of polyethylene terephthalate and 0.01-1 wt % silica;
- the intermediate layer comprises 40-60 wt % of polyethylene terephthalate and 40-60 wt % of amorphous copolyester;
- the primer layer comprises polyethylenimine;
- and the top layer comprises 90-100 wt % low density polyethylene having a thickness of about 6 μm or less.
Dependencies are inferred from the claim text.