To provide an ETFE film which is unlikely to wrinkle when stretched and retracted, and a method for producing the same. It is an ethylene-tetrafluoroethylene copolymer film characterized in that the crystallinity obtained by the formula (1) from the peak area S.sub.20 in the vicinity of 2=20, the peak area S.sub.19 in the vicinity of 2=19 and the peak area S.sub.17 in the vicinity of 2=17 in the diffraction intensity curve obtained by the X-ray diffraction method, is from 55 to 70%, and the proportion of the quasi-crystal layer obtained by the formula (2) is from 10 to 20%:
crystallinity (%)=(S.sub.19+S.sub.2)/(S.sub.17+S.sub.19+S.sub.20)100(1)
proportion of quasi-crystal layer (%)=S.sub.20/(S.sub.17+S.sub.19++S.sub.20)100(2).

A joint between an insulative sidewall of a medical electrical lead subassembly and an underlying fluoropolymer layer includes an interfacial layer. A first section of the interfacial layer is bonded to the fluoropolymer layer and is formed by a thermoplastic fluoropolymer; a second section of the interfacial layer extends adjacent the first section and is bonded to the insulative sidewall. The insulative sidewall, of the subassembly, and the second section, of the interfacial layer, are each formed from a material that is not a fluoropolymer. A recess is formed in the first section of the interfacial layer and the second section of the interfacial layer extends within the recess.

A fan blade platform is provided. The fan blade platform may include a wall, a first sidewall extending from the flowpath to a circular member, and a second sidewall extending from the flowpath to the circular member. A stiffening member may also extend from the circular member to the flowpath and be formed integrally with the first sidewall, the second sidewall, and the flowpath.

A venting apparatus is disclosed herein. The venting apparatus comprises a substrate, such as a metal substrate or a specialty plastic substrate, having an opening therein and a fluoropolymer membrane, such as ePTFE, disposed over said opening and thermally bonded using a thermoplastic material to said substrate. This allows the fluoropolymer membrane to be directly bonded to the said substrate without using an adhesive layer.

To provide an ETFE film which is unlikely to wrinkle when stretched and retracted, and a method for producing the same. It is an ethylene-tetrafluoroethylene copolymer film characterized in that the crystallinity obtainable by the formula (1) from the peak area S.sub.20 in the vicinity of 2=20, the peak area S.sub.19 in the vicinity of 2=19 and the peak area S.sub.17 in the vicinity of 2=17 in the diffraction intensity curve obtainable by the X-ray diffraction method, is from 55 to 70%, and the proportion of the quasi-crystal layer obtainable by the formula (2) is from 10 to 20%:

Crystallinity (%)=(S.sub.19+S.sub.20)/(S.sub.17+S.sub.19+S.sub.20)100(1)

Proportion of quasi-crystal layer (%)=S.sub.20/(S.sub.17+S.sub.19+S.sub.20)100(2)

A fan blade platform is provided. The fan blade platform may include a wall, a first sidewall extending from the flowpath to a circular member, and a second sidewall extending from the flowpath to the circular member. A stiffening member may also extend from the circular member to the flowpath and be formed integrally with the first sidewall, the second sidewall, and the flowpath.

A fan blade platform is provided. The fan blade platform may include a wall, a first sidewall extending from the flowpath to a circular member, and a second sidewall extending from the flowpath to the circular member. A stiffening member may also extend from the circular member to the flowpath and be formed integrally with the first sidewall, the second sidewall, and the flowpath.

An object of the present invention is to provide a method for manufacturing a touch panel. A laminated film is used. The laminated film comprises a resin layer, a protection film-constituent material layer provided on a surface of the resin layer, and a releasing layer provided on a surface of the protection film-constituent material layer. The protection film-constituent material layer is a layer containing fluorine-based substances. The releasing layer is a layer made by using a fluorine-based resin. The method comprises a molding process, a hardening treatment process for providing hardening treatment to the protection film-constituent material layer after the molding process, and a removal process for removing the releasing layer after the molding process. The protection film-constituent material layer is an uncured layer in the course of a molding process.

A fan blade platform is provided. The fan blade platform may include a wall, a first sidewall extending from the flowpath to a circular member, and a second sidewall extending from the flowpath to the circular member. A stiffening member may also extend from the circular member to the flowpath and be formed integrally with the first sidewall, the second sidewall, and the flowpath.