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US 2003/0198771 A1Published application
Fluoropolymer articles
Assignee3M Innovative Properties Company
InventorsTatsuo Fukushi, Naiyong Jing
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Abstract
The invention provides an article comprising a first layer comprising a first substantially solid partially-fluorinated thermoplastic polymer, and a second layer comprising a second substantially solid partially-fluorinated thermoplastic polymer, the second layer bonded to the first layer, wherein the first polymer and the second polymer have different compositions. The invention also provides layered articles and processes for preparing layered articles.
Claims33
An article comprising:
- a first layer comprising a first substantially solid partially-fluorinated thermoplastic polymer;
- and
- a second layer comprising a second substantially solid partially-fluorinated thermoplastic polymer, the second layer bonded to the first layer;
- wherein the first polymer and the second polymer have different compositions.
1 more element
A process for preparing a layered article comprising:
- a) providing a first layer comprising a substantially solid partially-fluorinated polymer;
- b) providing a second layer comprising a substantially solid partially-fluorinated polymer contacting a surface of the first layer;
- c) heating at least one layer to a temperature above its softening point or melting point for a time sufficient to bond the layers;
- and
- d) optionally pressing said first layer to said second layer;
- wherein a bonding interface between said first layer and said second layer consists essentially of a first material having the composition of said first layer and a second material having the composition of said second layer.
3 more elements
A process for preparing a layered article comprising:
- a) extruding a first layer comprising a first layer comprising a substantially solid partially-fluorinated thermoplastic polymer;
- b) extruding a second layer comprising a substantially solid partially-fluorinated thermoplastic polymer on a surface of the first layer;
- wherein a bonding interface between said first layer and said second layer consists essentially of a first material having the composition of said first layer and a second material having the composition of said second layer,
- and wherein said first layer and said second layer are bonded while at least one layer is above its melting point or softening point.
1 more element
Dependencies are inferred from the claim text.