Itt Corporation

Itt Industries, Inc.

Other

Itt Manufacturing Enterprises, Inc.

Itt Automotive, Inc.

Frank L Mitchell

David L Noone

Tao Nie

James D McDaniel

Robert M Davie

Ralph A Iorio

Peter Wenig

Craig Cheney

An elongated multi-layer tubing is disclosed for connection to a motor vehicle system to handle fluids containing hydrocarbons. The tubing includes a first layer disposed radially innermost and having an inner surface capable of prolonged exposure to a fluid containing hydrocarbons and an outer surface spaced a first predetermined radial thickness from the inner surface, the first layer consisting essentially of an extrudable, melt-processible thermoplastic. The tubing also includes a second layer having a second predetermined radial thickness at most equal to the thickness of the first layer. The second layer is uniformly and homogeneously connected to or bonded to the first layer and consists essentially of an extrudable, melt-processible thermoplastic capable of sufficiently permanent laminar adhesion with the first layer to prevent delamination during a desired lifetime of the tubing. At least one of the first and second layers is resistant to permeation by hydrocarbons. The tubing includes a third layer having a third predetermined radial thickness greater than the thickness of the first layer. The third layer is capable of sufficiently permanent laminar adhesion to the second layer to prevent delamination during said desired lifetime of said tubing. The third layer is uniformly and homogeneously connected to or bonded to the second layer and consists essentially of an extrudable, melt-processible thermoplastic. At least one layer of the tubing is capable of dissipating electrostatic energy in a range between about 10to 10Ohm/cm.

Multi-layer tubing having electrostatic dissipation for handling hydrocarbon fluids

A layered tubing for use in a motor vehicle composed of a thick outer tubing having an inner and an outer face, the outer tubing made of an extrudable thermoplastic such as a polyamide like Nylon 12; a thin intermediate bonding layer bonded to the inner face of the thick outer layer, the bonding layer composed of an extrudable melt-processible thermoplastic such as poly butylene terepthalate capable of sufficiently permanent laminar adhesion to the polyamide outer tubing; and an inner layer bonded to the intermediate bonding layer, the inner layer composed of an extrudable, melt-processible thermoplastic such as Nylon 12.

Multi-layer fuel and vapor tube

An elongated multi-layer tubing is disclosed for connection to a motor vehicle system to handle fluids containing hydrocarbons. The tubing includes a first layer disposed radially innermost and having an inner surface capable of prolonged exposure to a fluid containing hydrocarbons and an outer surface spaced a first predetermined radial thickness from the inner surface, the first layer consisting essentially of an extrudable, melt-processible thermoplastic. The tubing also includes a second layer having a second predetermined radial thickness at most equal to the thickness of the first layer. The second layer is uniformly and homogeneously connected to or bonded to the first layer and consists essentially of an extrudable, melt-processible thermoplastic capable of sufficiently permanent laminar adhesion with the first layer to prevent delamination during a desired lifetime of the tubing. At least one of the first and second layers is resistant to permeation by hydrocarbons. The tubing includes a third layer having a third predetermined radial thickness greater than the thickness of the first layer. The third layer is capable of sufficiently permanent laminar adhesion to the second layer to prevent delamination during said desired lifetime of said tubing. The third layer is uniformly and homogeneously connected to or bonded to the second layer and consists essentially of an extrudable, melt-processible thermoplastic. At least one layer of the tubing is capable of dissipating electrostatic energy in a range between about 10 to 10 Ohm/cm .

A multi-layer tube comprises a metal tube having an outer surface and a zinc layer bonded to the metal tube outer surface, wherein the zinc layer is selected from the group consisting of zinc plating, zinc nickel alloys, zinc cobalt alloys, zinc aluminum alloys, and mixtures thereof. A surface treatment layer is bonded to the zinc layer, wherein the surface treatment layer is selected from the group consisting of a zinc/aluminum/rare earth alloy, phosphate, chromate and mixtures thereof. A first polymeric layer is bonded to the surface treatment layer, wherein the first polymeric layer is selected from the group consisting of a thermoplastic elastomer, an ionomer, a nylon, a fluoropolymer, and mixtures thereof. A second polymeric layer is bonded to the first polymeric layer, wherein the second polymeric layer is selected from the group consisting of a nylon, a thermoplastic elastomer, a fluoropolymer, and mixtures thereof. A process for manufacturing a multi-layer tubing for conveying fluids in a vehicle system comprises the step of extruding multiple layers of a melt-processible thermoplastic to a pretreated metal tube having an external surface with at least a zinc based coating and a sealant coating on top of the zinc based coating.

Process for manufacturing tubing having a metal layer with an external surface overlaying by multiple plastic layers bonded thereto

A layered tubing for use in a motor vehicle composed of an outer layer having an inner and an outer face, the outer layer made of an extrudable thermoplastic; an intermediate layer connected with the inner face of the outer layer, the intermediate layer composed of an extrudable melt-processible thermoplastic capable of sufficiently permanent laminar adhesion or connection with the outer layer; and an inner layer connected with the intermediate layer, the inner layer composed of an extrudable, melt processible thermoplastic capable of sufficiently permanent laminar adhesion of connection with the intermediate bonding layer, the thermoplastic containing as a major constituent a fluoroplastic such as polyvinylidine fluoride, polyvinyl fluoride, and the like.

Extruded multiple plastic layer coating bonded to a metal tube and

An elongated multi-layer tubing is disclosed for connection to a motor vehicle system to handle fluids containing hydrocarbons. The tubing includes a first layer disposed radially innermost and having an inner surface capable of prolonged exposure to a fluid containing hydrocarbons and an outer surface spaced a first predetermined radial thickness from the inner surface, the first layer consisting essentially of an extrudable, melt-processible thermoplastic. The tubing also includes a second layer having a second predetermined radial thickness at most equal to the thickness of the first layer. The second layer is uniformly and homogeneously connected to or bonded to the first layer and consists essentially of an extrudable, melt-processible thermoplastic capable of sufficiently permanent laminar adhesion with the first layer to prevent delamination during a desired lifetime of the tubing. At least one of the first and second layers is resistant to permeation by hydrocarbons. The tubing includes a third layer having a third predetermined radial thickness greater than the thickness of the first layer. The third layer is capable of sufficiently permanent laminar adhesion to the second layer to prevent delamination during said desired lifetime of said tubing. The third layer is uniformly and homogeneously connected to or bonded to the second layer and consists essentially of an extrudable, melt-processible thermoplastic. At least one layer of the tubing is capable of dissipating electrostatic energy in a range between about 10.sup.4 to 10.sup.9 Ohm/cm.sup.2.

Multi-layer tubing having electrostatic dissipation for handling

A layered tubing for use in a motor vehicle composed of an outer layer having an inner and an outer face, the outer layer made of an extrudable thermoplastic such as a polyamide such as Nylon 6; a thin intermediate layer uniformly connected with the inner face of the outer layer, the intermediate layer composed of an extrudable melt-processible thermoplastic capable of sufficiently permanent laminar connection with the polyamide outer layer; and an inner barrier layer uniformly connected with the intermediate layer, the inner layer composed of an extrudable, melt processible thermoplastic capable of sufficiently permanent laminar adhesion with the intermediate bonding layer, the thermoplastic preferably containing as a major constituent a fluoroplastic such as polychlorotrifluoroethylene, ethylene tetrafluoroethylene copolymers and the like.

A layered tubing for use in a motor vehicle composed of a thick outer layer having an inner and an outer face, the outer tubing made of an extrudable thermoplastic such as a polyamide like Nylon 12; a thin intermediate layer uniformly connected with the inner face of the thick outer layer, the intermediate layer composed of an extrudable melt-processible thermoplastic capable of sufficiently permanent laminar connection with the polyamide outer layer; and an inner layer uniformly connected with the intermediate bonding layer, the inner layer composed of an extrudable, melt processible thermoplastic capable of sufficiently permanent laminar connection with the intermediate layer, the thermoplastic containing as a major constituent a fluoroplastic such as polychlorotrifluoroethylene, ethylene tetrafluoroethylene copolymers, and the like.

A multi-layer tube having a metal tube having an outer surface and a zinc layer bonded to the metal tube outer surface. The zinc layer being selected from the group consisting of zinc plating, zinc nickel alloys, zinc cobalt alloys, zinc aluminum alloys, and mixtures thereof. A surface treatment layer is bonded to the zinc layer, wherein the surface treatment layer is selected from the group consisting of a zinc/aluminum/rare earth alloy, phosphate, chromate and mixtures thereof. A first polymeric layer is bonded to the surface treatment layer, wherein the first polymeric layer is selected from the group consisting of a thermoplastic elastomer, an ionomer, a nylon, a fluoropolymer, and mixtures thereof. A second polymeric layer is bonded to the first polymeric layer, wherein the second polymeric layer is selected from the group consisting of a nylon, a thermoplastic elastomer, a fluoropolymer, and mixtures thereof. The tube also has a continuous interior layer made of non-reactive material which is preferably made of a polymeric material which is substantially non-reactive in the presence of short chain alcohols. The process for manufacturing the multi-layer tubing of the present invention also includes the steps of positioning a length of non-reactive tubing into the interior of unsealed metal tube, sealing the metal tube with the non-reactive tubing contained within and extruding multiple layers of a melt-processible thermoplastic onto the external surface metal tube the external surface can be pretreated with at least a zinc based coating and a sealant coating on top of the zinc based coating.

Extruded multiple plastic layer coating bonded to the outer surface of a

A layered tubing for use in a motor vehicle composed of a thick outer tubing having an inner and an outer face, the outer tubing made of an extrudable thermoplastic such as a polyamide like Nylon 12; a thin intermediate bonding layer bonded to the inner face of the thick outer layer, the bonding layer composed of an extrudable melt-processible thermoplastic capable of sufficiently permanent laminar adhesion to the polyamide outer tubing; and an inner hydrocarbon barrier layer bonded to the intermediate bonding layer, the inner layer composed of an extrudable, melt processible thermoplastic capable of sufficiently permanent laminar adhesion to the intermediate bonding layer, the thermoplastic containing as a major constituent a fluoroplastic such as polyvinylidine fluoride, polyvinyl fluoride, and the like.

A layered tubing for use in a motor vehicle composed of a thick outer layer having an inner and an outer face, the outer layer made of an extrudable thermoplastic elastomer; a thin intermediate bonding layer bonded to the inner face of the thick outer layer, the bonding layer composed of an extrudable melt-processible thermoplastic capable of sufficiently permanent laminar adhesion with the thick outer layer; an interior layer bonded to the intermediate bonding layer, the interior layer composed of a fluoroplastic which is resistant to permeation by and interaction with short-chain aliphatic and aromatic compounds; and an innermost electrostatic dissipation layer.

A layered tubing for use in a motor vehicle composed of a thick outer tubing having an inner and an outer face, the outer tubing made of an extrudable thermoplastic such as a polyamide such as Nylon 6; a thin intermediate bonding layer bonded to the inner face of the thick outer layer, the bonding layer composed of an extrudable melt-processible thermoplastic capable of sufficiently permanent laminar adhesion to the polyamide outer tubing; and an inner hydrocarbon barrier layer bonded to the intermediate bonding layer, the inner layer composed of an extrudable, melt processible thermoplastic capable of sufficiently permanent laminar adhesion with the intermediate bonding layer, the thermoplastic containing as a major constituent a fluoroplastic such as polychlorotrifluoroethylene, ethylene tetrafluoroethylene copolymers and the like.

Growing community of inventors

Rochester, MI, United States of America

Frank L Mitchell