Coextruded mechanical fastener constructions
First Claim
1. A web of material having two sides and a plurality of stems extending from at least one side of the web, the web comprising:
- a first layer of material having a first side and a second side; and
a second layer of material having a first side and a second side, wherein the first side faces and is joined to the first side of the first layer;
wherein the stems are formed from both the first layer of material and the second layer of material such that the material forming the second layer extends from the second side of the second layer, and the material forming the first layer protrudes into the material forming the second layer to form at least a part of the stems.
2 Assignments
0 Petitions
Accused Products
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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Citations
18 Claims
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1. A web of material having two sides and a plurality of stems extending from at least one side of the web, the web comprising:
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a first layer of material having a first side and a second side; and a second layer of material having a first side and a second side, wherein the first side faces and is joined to the first side of the first layer; wherein the stems are formed from both the first layer of material and the second layer of material such that the material forming the second layer extends from the second side of the second layer, and the material forming the first layer protrudes into the material forming the second layer to form at least a part of the stems. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of making a web of material having a plurality of stems extending from at least one side of the web, wherein the method comprises the steps of:
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selecting at least a first material for a first layer of material; selecting at least a second material for a second layer of material; melt forming, from the first material, the first layer having a first surface and a second surface; melt forming, from the second material, the second layer having a first surface and a second surface; joining the first surfaces of first and second layers of material while the layers are in the molten state to form a multiple layer sheet; forming a plurality of stems from at least one of the first material and the second material on at least the second surface of the second layer of material; and selecting relative quantities of the first and second materials such that the first material which forms the first laver protrudes into or through the second layer and forms at least part of the stems formed on the second surface of the second layer. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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Specification