Process for forming a laminate
AssigneeDow Global Technologies LLC
InventorAbraham Barretto
Life of this patent
Estimating the term…
Abstract
The present disclosure provides a process. The process includes (A) providing at least 6 film layers, each film layer being a pearlized biaxially oriented polypropylene; (B) applying a solvent-less adhesive at a coat weight of 2.0 g/m2 to 3.5 g/m2 between each film layer; and (C) forming a laminate, the laminate having a thickness of at least 300 μm. The solvent-less adhesive contains (i) a polyol component including at least one polyol selected from a polyester polyol, a polyether polyol, and combinations thereof; and (ii) an isocyanate component including an isocyanate prepolymer that is the reaction product of at least one isocyanate monomer and at least one polyol selected from a polyester polyol, a polyether polyol, and combinations thereof. The present disclosure also provides a laminate formed by said process.
Claims18
A laminate comprising:
- at least 6 film layers, each film layer being a pearlized biaxially oriented polypropylene (BOPP), with one of the BOPP film layers being an outermost layer on a first side of the laminate and another BOPP layer being an outermost layer on a second side opposing the first side;
- an adhesive layer between each film layer, each adhesive layer in direct contact with two film layers, each adhesive layer formed from a solvent-less adhesive comprising
- (i) a polyol component comprising at least one polyol selected from the group consisting of a polyester polyol, a polyether polyol, and combinations thereof;
- (ii) an isocyanate component comprising an isocyanate prepolymer that is the reaction product of at least one isocyanate monomer and at least one polyol selected from the group consisting of a polyester polyol, a polyether polyol, and combinations thereof;
- and
- the laminate has a thickness of at least 300 μm.
A laminate comprising:
- at least 6 film layers, each film layer being a pearlized biaxially oriented polypropylene (BOPP), each film layer having a thickness from 50 μm to 80 μm, with one of the BOPP film layers being an outermost layer on a first side of the laminate and another BOPP layer being an outermost layer on a second side opposing the first side;
- an adhesive layer between each film layer, each adhesive layer in direct contact with two film layers, each adhesive layer formed from a solvent-less adhesive comprising
- (i) a polyol component comprising at least one polyol selected from the group consisting of a polyester polyol, a polyether polyol, and combinations thereof;
- (ii) an isocyanate component comprising an isocyanate prepolymer that is the reaction product of at least one isocyanate monomer and at least one polyol selected from the group consisting of a polyester polyol, a polyether polyol, and combinations thereof;
- and
- the laminate has a thickness of at least 300 μm.
A process comprising:
- (A) providing at least 6 film layers, each film layer being a pearlized biaxially oriented polypropylene (BOPP) with one of the BOPP film layers being an outermost layer on a first side of the laminate and another BOPP layer being an outermost layer on a second side opposing the first side;
- (B) applying a solvent-less adhesive at a coat weight from 2.0 g/m2 to 3.5 g/m2 between each film layer such that the solvent-less adhesive is in direct contact with two film layers, the solventless adhesive comprising
- (i) a polyol component comprising at least one polyol selected from the group consisting of a polyester polyol, a polyether polyol, and combinations thereof;
- (ii) an isocyanate component comprising an isocyanate prepolymer that is the reaction product of at least one isocyanate monomer and at least one polyol selected from the group consisting of a polyester polyol, a polyether polyol, and combinations thereof;
- and
- (C) forming a laminate, the laminate having a thickness of at least 300 μm.
Dependencies are inferred from the claim text.