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US 10,882,284 B2Granted
Laminate containing coated polyester film
AssigneeMitsubishi Polyester Film GmbH
InventorMichael Daniel Grah
Life of this patent
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Abstract
A bonding material is described that is well suited to bonding polymer films, such as polyester films, to other substrates. In one embodiment, for instance, the bonding material can be used to bond a polyester film to a polypropylene article. The bonding material generally comprises an adhesive agent combined with a cross-linking agent. The adhesive agent may comprise a carboxylic acid modified polypropylene homopolymer, copolymer or ionomer. In one embodiment, the adhesive agent comprises a polypropylene modified by an unsaturated dicarboxylic acid anhydride. The cross-linking agent, on the other hand, may comprise an oxazoline polymer.
Claims35
A coated film comprising:
- a biaxially stretched polyester film having a first side and a second side, and;
- a reacted coating on the first side of the polyester film, the coating comprising a bonding layer, an interface between the biaxially stretched polyester film and the bonding layer being hydrophobic, the bonding layer containing hydrophobic components, the hydrophobic components comprising an adhesive agent and a cross-linking agent, the adhesive agent comprising an acid or acid anhydride modified polypropylene homopolymer or copolymer, the acid or acid anhydride used to modify the polypropylene homopolymer or copolymer having a carbon chain length of from about 1 carbon atom to about 28 carbon atoms;
- and
- wherein the adhesive agent and the cross-linking agent are contained in the coating at a weight ratio of adhesive agent to cross-linking agent of about 3:7 to about 20:1 when the coating is dried.
1 more element
A laminate comprising:
- a polyester film having a first side and a second side;
- a reacted bonding layer, an interface between the polyester film and the reacted bonding layer being hydrophobic, the reacted bonding layer containing hydrophobic components, on the first side of the polyester film, the hydrophobic components comprising an adhesive agent and a cross-linking agent, the adhesive agent comprising a carboxylic acid modified polypropylene homopolymer or copolymer, the carboxylic acid including carboxylic acid anhydrides and having a carbon chain length of from about 1 carbon atom to about 10 carbon atoms, the cross-linking agent comprising an oxazoline, a carbodiimide, an epoxy, an isocyanate, or a melamine and wherein the adhesive agent and the cross-linking agent are contained in the coating at a weight ratio of adhesive agent to cross-linking agent of about 3:7 to about 20:1 when the coating is dried;
- and
- a polymer article bonded to the polyester film, the coating being positioned between the polyester film and polymer article, the coating securely bonding the polymer article to the polyester film, and wherein the polymer article comprises a polyolefin.
1 more element
A laminate comprising:
- a polyester film having a first side and a second side;
- a reacted bonding layer, an interface between the polyester film and the reacted bonding layer being hydrophobic, the reacted bonding layer containing hydrophobic components the first side of the polyester film, the hydrophobic components comprising an adhesive agent and a cross-linking agent, the adhesive agent comprising a carboxylic acid modified polypropylene homopolymer or copolymer, the carboxylic acid including carboxylic acid anhydrides and having a carbon chain length of from about 1 carbon atom to about 10 carbon atoms, the cross-linking agent comprising an oxazoline, a carbodiimide, an epoxy, an isocyanate, or a melamine, and wherein the adhesive agent and the cross-linking agent are contained in the coating at a weight ratio of adhesive agent to cross-linking agent of about 3:7 to about 20:1 when the coating is dried;
- and
- a polymer article bonded to the polyester film, the coating being positioned between the polyester film and polymer article, the coating bonding the polymer article to the polyester film, wherein the polymer article comprises a polyolefin, and wherein the polyester film and the polymer article are bonded such that a bond strength between the polyester film and the polymer article exhibits a peel strength of greater than about 2.9 lbf/inch.
1 more element
Dependencies are inferred from the claim text.