Claims
- 1. A method of producing a fuel hose comprising a rubber or thermoplastic resin outer ply laminated directly onto a tubular fluororesin inner ply, which comprises: extrusion-molding a tubular fluororesin, modifying the outer surface of the tubular fluororesin by a vacuum plasma treatment, applying an adhesive onto the modified surface of the tubular inner ply, and extrusion-molding a rubber or thermoplastic resin directly onto the adhesive-applied surface of the tubular inner ply.
- 2. A method of producing a fuel hose according to claim 1, wherein the fluororesin has a F/C ratio of .ltoreq.1.6, and the modified outer surface of the tubular fluororesin contains oxygen and has an F/C ratio of .ltoreq.1.12 and an O/C ratio of .gtoreq.0.08.
- 3. The method of producing a fuel hose according to claim 1, wherein the thermoplastic resin outer ply is formed by melting a thermoplastic resin, extruding the molten thermoplastic resin onto the outer surface of the tubular inner ply, and cooling the extruded thermoplastic resin to solidify and adhere the thermoplastic resin to the outer surface of the tubular inner ply.
- 4. A method of producing a fuel hose according to claim 1, wherein the thermoplastic resin is a polyamide resin.
- 5. A method of producing a fuel hose according to claim 1, wherein the thickness of the inner ply is 0.05-1.00 mm.
- 6. A method of producing a fuel hose according to claim 1, wherein the fluororesin has an F/C ratio such that 1.6<F/C.ltoreq.2.0, and the outer modified surface of the tubular fluororesin contains oxygen and has F/C and O/C ratios which satisfy the following relationships:
- (a) when F/C is less than 0.8, then O/C is not less than 0.08; and
- (b) when F/C is in the range F/C=0.8-1.8, then O/C is defined by the following equation (1):
- O/C>0.2-0.09.times.(F/C) (1)
Priority Claims (3)
Number |
Date |
Country |
Kind |
5-225980 |
Sep 1993 |
JPX |
|
5-307414 |
Nov 1993 |
JPX |
|
5-339245 |
Dec 1993 |
JPX |
|
Parent Case Info
This is a division of application Ser. No. 08/424,469 filed May 9, 1995, U.S. Pat. No. 5,718,957 which was a .sctn. 371 national phase of international application PCT/JP94/01501 filed Sep. 9, 1994.
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Divisions (1)
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Number |
Date |
Country |
Parent |
424469 |
May 1995 |
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