Stock material or miscellaneous articles – Structurally defined web or sheet – Including sheet or component perpendicular to plane of web...
Patent
1997-10-03
2000-08-22
Bell, Mark L.
Stock material or miscellaneous articles
Structurally defined web or sheet
Including sheet or component perpendicular to plane of web...
428167, 428172, C08J 500, C08J 518, C08J 700, C08J 704
Patent
active
061069221
ABSTRACT:
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.
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Velcro Companies Home Page; www.velcro.com/velcro.htm; Product Information; Elastic Loop Tapes XP002091024.
Cejka John E.
Dupre Mark R.
Emslander Jeffrey O.
Hartt William H.
Kampfer Robert D.
3M Innovative Company
Bell Mark L.
DiVerdi Michael J.
Levine Charles D.
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