A tube used or medical or other purposes is concentrically bonded to an inner lining tube by sequentially inserting a core within the inner lining tube, creating an adhesive layer on the outer surface of the inner lining tube, inserting the inner lining tube and core into the lumen of the outer tube, and then activating the adhesive to bond the inner tune to the outer tube before removing the core.

A heat-resistant two-layer heat-shrinkable tube including an outer layer and an inner layer, and a method for covering an object to be covered with the heat-resistant two-layer heat-shrinkable tube. The outer layer consists of a cross-linked product of a resin composition containing a resin, such as a tetrafluoroethylene-ethylene copolymer with a melting point of 210 C. or more and 260 C. or less, and a cross-linking aid. The outer layer thermally shrinks at 250 C. or more and 280 C. or less. The inner layer consists of a hot-melt adhesive composed mainly of an acid-modified tetrafluoroethylene-ethylene copolymer or the like and having a shear viscosity of less than 10000 Pa.Math.s at 250 C. and at a shear rate of 10 s.sup.1.

Embodiments of the present disclosure are directed to an adhesive layer, bearing including the adhesive layer, and methods of forming. The adhesive layer can include a mixture of a first polymer, a second polymer, and a third polymer, wherein the second polymer includes ethylene tetrafluoroethylene, and the third polymer includes a modified ethylene tetrafluoroethylene, ethylene tetrafluoroethylene hexafluoropropylene, or a combination thereof. In a particular embodiment, the first polymer can include an aromatic polymer. In another embodiment, the adhesive layer can have a tensile stress in an extrusion direction of at least 30 MPa.

Embodiments of the present disclosure are directed to an adhesive layer, bearing including the adhesive layer, and methods of forming. The adhesive layer can include a mixture of a first polymer, a second polymer, and a third polymer, wherein the second polymer includes ethylene tetrafluoroethylene, and the third polymer includes a modified ethylene tetrafluoroethylene, ethylene tetrafluoroethylene hexafluoropropylene, or a combination thereof. In a particular embodiment, the first polymer can include an aromatic polymer. In another embodiment, the adhesive layer can have a tensile stress in an extrusion direction of at least 30 MPa.

Embodiments of the present disclosure are directed to an adhesive layer, bearing including the adhesive layer, and methods of forming. The adhesive layer can include a mixture of a first polymer, a second polymer, and a third polymer, wherein the second polymer includes ethylene tetrafluoroethylene, and the third polymer includes a modified ethylene tetrafluoroethylene, ethylene tetrafluoroethylene hexafluoropropylene, or a combination thereof. In a particular embodiment, the first polymer can include an aromatic polymer. In another embodiment, the adhesive layer can have a tensile stress in an extrusion direction of at least 30 MPa.

The present invention relates to a polymeric composition comprising a first polymer component C being selected from TFE/PAVE polymers comprising a small amount of chlorinated monomers selected from chlorotrifluoroethylene and dichlorodifluoroethylene and a second optional polymer component D being selected from TFE/PAVE polymers and being free from chlorine. The polymeric composition of the invention is characterized in that it has a total Cl content of from 0.01 to 0.25% by weight. The composition of the invention has very good adhesion on metals and plastics despite a very low total level of chlorine.

The present invention relates to a polymeric composition comprising a first polymer component C being selected from TFE/PAVE polymers comprising a small amount of chlorinated monomers selected from chlorotrifluoroethylene and dichlorodifluoroethylene and a second optional polymer component D being selected from TFE/PAVE polymers and being free from chlorine. The polymeric composition of the invention is characterized in that it has a total Cl content of from 0.01 to 0.25% by weight. The composition of the invention has very good adhesion on metals and plastics despite a very low total level of chlorine.

An embodiment of the present invention relates to a bonded object or a method for manufacturing a bonded object, the bonded object having bases bonded therein while placing an adhesive layer in between, the adhesive layer being obtained from a fluororubber composition that contains at least one fluororubber selected from fluoroelastomer (FKM) and perfluoroelastomer (FFKM), and has a Mooney viscosity (ML 1+10) at 121? C., measured in accordance with ASTM D1646, of 80 to 115.

An embodiment of the present invention relates to a bonded object or a method for manufacturing a bonded object, the bonded object having bases bonded therein while placing an adhesive layer in between, the adhesive layer being obtained from a fluororubber composition that contains at least one fluororubber selected from fluoroelastomer (FKM) and perfluoroelastomer (FFKM), and has a Mooney viscosity (ML 1+10) at 121? C., measured in accordance with ASTM D1646, of 80 to 115.

An adhesive layer can include a polymer blend of a first polymer and a second polymer. In an embodiment, the first polymer can be a modified fluoropolymer. In another embodiment, the second can be a non-fluorinated polymer. In a particular embodiment, the adhesive layer can include greater than 60 wt. % of the first polymer for the total weight of the polymer blend. A bearing can include the adhesive layer disposed over a substrate.