Abstract: A fuel tube having an ethylene-vinyl alcohol copolymer (EVOH) layer formed of an EVOH-based extruded EVOH material, and a modified MHDPE layer formed of an extruded MHDPE material which is based on modified medium high density polyethylene (modified MHDPE) or is based on a polymer alloy containing mainly modified MHDPE. The modified MHDPE is a dicarboxylic acid-modified material having a melt mass flow rate value (190° C.: JIS K 7210) of about 0.01 to 0.9 g/10min. The interlayer adherability between the EVOH layer 14 and the modified MHDPE layer 16 is maintained while maintaining the anti-fuel permeability and the flexibility of the fuel tube 12.

Abstract: A connector comprises a casing 20 with a pipe fitting bore 25 to which a pipe P is fitted; a pipe fixing component 30 which slides against the casing and fixed the pipe P when the pipe is fitted to the pipe fitting bore 25; and a seal component 40 that is mounted facing the pipe duct 26 to seal the pipe P. The pipe fixing component 30 is elastically deformed, when the pipe P is fitted, from the temporary stop position at which it is temporarily stopped in the pipe fitting bore 25, and moves to the connecting position where the pipe is fixed, it being possible to externally view whether the pipe fixing component 30 is in the connecting position. The connector requires no checker or the like to check the connection with the pipe P, thus preventing poor seals.

Abstract: A fuel tube having an ethylene-vinyl alcohol copolymer (EVOH) layer formed of an EVOH-based extruded EVOH material, and a modified HDPE layer formed of an extruded HDPE material which is based on modified high density polyethylene (modified HDPE) or is based on a polymer alloy containing mainly modified HDPE. The modified HDPE is a dicarboxylic acid-modified material having a melt mass flow rate value (190° C.: JIS K 7210) of about 0.2 to 10.0 g/10 min. The interlayer adherability between the EVOH layer 14 and the modified HDPE layer 16 is maintained while maintaining the anti-fuel permeability and the flexibility of the fuel tube 12.

Abstract: A resin hose for fuel in a plural-layer structure comprising a main body layer (14) made of aliphatic polyamide, and an inner tube layer (16) made of fluoroplastic disposed on the inner side of the main body layer (14). One or both of the aliphatic polyamide (aliphatic PA) and the fluoroplastic are respectively a modified aliphatic PA and a modified fluoroplastic. The characteristics of the both satisfy the requirements of a difference of melting point (DSC method) of 60° C. or less, and a difference of modulus of flexural elasticity (ASTM D 790) of 1500 MPa or less. Accordingly, the main body layer (14) and the inner tube layer (16) can be directly adhered to each other by co-extrusion.

Abstract: A connector comprises a casing 20 with a pipe fitting bore 25 to which a pipe P is fitted; a pipe fixing component 30 which slides against the casing and fixed the pipe P when the pipe is fitted to the pipe fitting bore 25; and a seal component 40 that is mounted facing the pipe duct 26 to seal the pipe P. The pipe fixing component 30 is elastically deformed, when the pipe P is fitted, from the temporary stop position at which it is temporarily stopped in the pipe fitting bore 25, and moves to the connecting position where the pipe is fixed, it being possible to externally view whether the pipe fixing component 30 is in the connecting position. The connector requires no checker or the like to check the connection with the pipe P, thus preventing poor seals.