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US 10,399,313 B2Granted
Bonding of heat-activated films including a plasticizer
AssigneeInvista North America S.A R.L.
InventorsCarmen A. Covelli, Douglas K. Farmer, Gavin N. Masters
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Abstract
Articles including a polymer film, a plasticizer and a substrate are included. A method of bonding the film to the substrate includes the use of the plasticizer which provides a durable bond by using a lower temperatures and shorter bonding times than would be required in the absence of the plasticizer.
Claims3
An article comprising:
- a heat-activated adhesive multilayer film comprising at least an inner layer, a center layer and an outer layer, wherein
- the center layer comprises a polymer comprising polyurethaneurea with a weight average molecular weight of from about 40,000 to about 250,000,
- the outer layer comprises polymer comprising a polyurethaneurea with a molecular weight of about 70,000 and
- the inner layer comprises polymer comprising a polyurethaneurea with a molecular weight of about 120,000;
- and
- a substrate to which the heat-activated adhesive multilayer film is bonded by application of heat and pressure in the presence of a plasticizer comprising water placed on the heat-activated adhesive multilayer film prior to or during bonding to a substrate.
3 more elements
Dependencies are inferred from the claim text.