3M Innovative Company

John E Cejka

Jayshree Seth

Leigh E Wood

Jeffrey O Emslander

Dennis G Welygan

Louis S Moren

Alan J Sipinen

William C Unruh

Robert D Kampfer

Francis V Loncar, Jr

Mark R Dupre

Diane L Regnier

Robert W Shipman

William H Hartt

A web of material has a plurality of stems extending from at least one side of the web. The web includes a first layer of material having a first side and a second side and a second layer of material. The second layer of material has a first side which faces the first side of the first layer and a second side from which the plurality of stems extend. The first and second layers of material are joined together while they are both molten, before either layer has cooled. The first and second layers of material can be formed of thermoplastic material or melt processable polymeric material. A method of making a web of material includes selecting a first material for a first layer of material and selecting a second material for a second layer of material. The first and second layers of material are melt formed. Then, the first and second layers of material are joined while the layers are in the molten state to form a multiple layer sheet. Next, a plurality of stems are formed on at least the second layer of material. Melt forming can include simultaneously melt forming the first and second layers of material such as by coextrusion.

Coextruded mechanical fastener constructions

Growing community of inventors

Hudson, WI, United States of America

John E Cejka