Abstract: A composition is provided for adhering a first article to a second article, the composition comprising a thermally active low Tg polymeric resin; and a multifunctional crystalline polymer. The thermally active low Tg polymeric resin can, for example, comprise 50-99% of the composition. The multifunctional crystalline polymer can, for example, comprise 1-50% of the composition. In one embodiment, the multifunctional crystalline polymer comprises 5-20% by weight of the composition. In one embodiment, the multifunctional crystalline polymer has a low molecular weight.
Type:
Grant
Filed:
June 24, 2010
Date of Patent:
June 21, 2011
Assignee:
L-1 Secure Credentialing
Inventors:
Robert L. Jones, Daoshen Bi, Tung-Feng Yeh
Abstract: An image destruct material comprises a release layer positioned between an image receiving layer and a base layer. The adhesion between the release layer and the base layer is greater than adhesion between the release layer and the image receiving layer. The release layer material can be used in secure documents that have an image receiving layer. After information is printed on the image receiving layer, an overlaminate is applied over it. Removal of the overlaminate destroys the printed image on the receiving layer because of the relative adhesive properties of the image receiving layer, overlaminate and release layer.
Type:
Grant
Filed:
August 23, 2005
Date of Patent:
May 10, 2011
Assignee:
L-1 Secure Credentialing
Inventors:
Daoshen Bi, Tung-Feng Yeh, Robert L. Jones, Brian C. LaBrec