Minnesota Mining and Manufacturing Company

3m Innovative Properties Company

Ralph H Bland

James M Jonza

Bruce D Stambaugh

Jeffrey F Bradley

James D Smith

Kenneth B Smith

Richard C Allen

Raymond L Lucking

William A Peper

Joseph A Fohrman

A tear resistant film comprises at least three layers situated one on the other in a parallel array. The layers are individually selected from a stiff polyester or copolyester, a ductile sebacic acid based copolyester, and optionally, an intermediate material. Tear resistance may be measured in a Graves area test and reflects the ability of the film to absorb energy. The films of the invention are useful in many articles including security control laminates for glazing members.

Tear resistant multilayer films based on sebacic acid copolyesters and

A tear resistant film comprises more than five layers situated one on the other in a parallel array. The layers are individually selected from a stiff polyester or copolyester, a ductile polymeric material, and optionally, an intermediate material. The stiff polyester or copolyester is oriented in at least one direction. Tear resistance may be measured in a Graves area test and reflects the ability of the film to absorb energy. The films of the invention are useful in many articles including security control laminates for glazing members.

Tear resistant multilayer films and articles incorporating such films

A coated abrasive article is disclosed comprising a backing comprising an outermost layer of a paper-like polymeric film. Said film improves the slip-resistance of the article.

Coated abrasive article

A dispensable multilayer film having alternating layers of a ductile material, a brittle material, and optionally an intermediate layer. The film has excellent strength in its longitudinal and transverse directions but can be transversely cut by forces of less than 9 Newtons on the cutters of commercially available table top tape dispensers. At least one surface of the sheet material can be coated with a functional material.

Severable multilayer thermoplastic film

Growing community of inventors

Saint Paul, MN, United States of America

Ralph H Bland