One aspect of the invention provides a composite refrigeration line set including at least one selected from the group consisting of: a suction line and a return line, characterized in that one or more of the suction line and the return line are a composite refrigeration line set tube include: an inner plastic tube; a first adhesive layer positioned about the inner plastic tube; an aluminum layer positioned about the first adhesive layer and coupled to the inner plastic tube via the first adhesive layer; a second adhesive layer positioned about the aluminum layer; and an outer plastic layer positioned about the aluminum layer coupled to the aluminum layer via the second adhesive layer. The inner plastic tube is polyethylene of raised temperature. The outer plastic tube is polyethylene of raised temperature. The aluminum layer comprises AL 3005-O.

One aspect of the invention provides a composite refrigeration line set including at least one selected from the group consisting of: a suction line and a return line, characterized in that one or more of the suction line and the return line are a composite refrigeration line set tube include: an inner plastic tube; a first adhesive layer positioned about the inner plastic tube; an aluminum layer positioned about the first adhesive layer and coupled to the inner plastic tube via the first adhesive layer; a second adhesive layer positioned about the aluminum layer; and an outer plastic layer positioned about the aluminum layer coupled to the aluminum layer via the second adhesive layer. The inner plastic tube is polyethylene of raised temperature. The outer plastic tube is polyethylene of raised temperature. The aluminum layer comprises AL 3005-O.

A gas barrier film including: a substrate layer containing polypropylene; a resin layer containing a copolymer of propylene and another monomer; a vapor deposition layer of an inorganic oxide; and a gas barrier layer, laminated in this order, wherein the vapor deposition layer has a thickness of 5 nm to 300 nm, the resin layer has a thickness of 0.3 .Math.m or more, and a surface of the resin layer facing the vapor deposition layer has at least one softening temperature in a range of 100° C. to 170° C. when measured by local thermal analysis (LTA).

A gas barrier film including: a substrate layer containing polypropylene; a resin layer containing a copolymer of propylene and another monomer; a vapor deposition layer of an inorganic oxide; and a gas barrier layer, laminated in this order, wherein the vapor deposition layer has a thickness of 5 nm to 300 nm, the resin layer has a thickness of 0.3 .Math.m or more, and a surface of the resin layer facing the vapor deposition layer has at least one softening temperature in a range of 100° C. to 170° C. when measured by local thermal analysis (LTA).

[Object] To provide a tube having excellent long-term reliability.

[Means for Solution]

A tube for use in a pump that transports a fluid by peristaltic movement, the tube including: a flow path that serves as a transport path of the fluid and extends in a first direction; and a body portion formed around the flow path, wherein the body portion includes a first layer formed on the flow path and a second layer formed on the first layer, a flexural modulus of elasticity in a radial direction of the second layer is smaller than a flexural modulus of elasticity in a radial direction of the first layer, and when an elastic modulus ratio R1 of the first layer is defined as a ratio of a tensile modulus of elasticity in a circumferential direction of the first layer to the flexural modulus of elasticity in the radial direction of the first layer, and an elastic modulus ratio R2 of the second layer is defined as a ratio of a tensile modulus of elasticity in a circumferential direction of the second layer to the flexural modulus of elasticity in the radial direction of the second layer, the elastic modulus ratio R2 of the second layer is larger than the elastic modulus ratio R1 of the first layer.

[Object] To provide a tube having excellent long-term reliability.

[Means for Solution]

A tube for use in a pump that transports a fluid by peristaltic movement, the tube including: a flow path that serves as a transport path of the fluid and extends in a first direction; and a body portion formed around the flow path, wherein the body portion includes a first layer formed on the flow path and a second layer formed on the first layer, a flexural modulus of elasticity in a radial direction of the second layer is smaller than a flexural modulus of elasticity in a radial direction of the first layer, and when an elastic modulus ratio R1 of the first layer is defined as a ratio of a tensile modulus of elasticity in a circumferential direction of the first layer to the flexural modulus of elasticity in the radial direction of the first layer, and an elastic modulus ratio R2 of the second layer is defined as a ratio of a tensile modulus of elasticity in a circumferential direction of the second layer to the flexural modulus of elasticity in the radial direction of the second layer, the elastic modulus ratio R2 of the second layer is larger than the elastic modulus ratio R1 of the first layer.

A cylinder sleeve, comprising a cylinder base sleeve consisting of cylindrical base layers arranged on top of each other, wherein said cylindrical base layers comprise one or more cylindrical polyurethane layers, wherein, independently of each other, at least 50 weight-% of each of said cylindrical polyurethane layers consist of polyurethane, and wherein the outermost cylindrical base layer is a cylindrical polyurethane layer; and one or more cylindrical layers, arranged on top of each other, wherein the innermost cylindrical layer is applied on the lateral surface of the cylinder base sleeve according to (a) and wherein the outermost layer of said one or more cylindrical layers is an adhesive layer for attaching a printing plate thereto, wherein the cylinder base sleeve according to (a) exhibits a carbon dioxide release coefficient R.sub.CO2 in the range of from 0 to 9.5 ppmv cm.sup.−3 d.sup.−1.

A gas barrier laminate (including a substrate layer containing a polyolefin, a metal oxide layer, and a gas barrier cover layer in this order. The gas barrier cover layer contains a silicon alkoxide or a hydrolysate thereof and a water-soluble polymer, and a content ratio a/b between a content of silicon atoms of the silicon alkoxide or a hydrolysate thereof (mass part a) and a content of the water-soluble polymer (mass part b) is 3/97 or more and 45/55 or less in mass ratio.

A gas barrier laminate (including a substrate layer containing a polyolefin, a metal oxide layer, and a gas barrier cover layer in this order. The gas barrier cover layer contains a silicon alkoxide or a hydrolysate thereof and a water-soluble polymer, and a content ratio a/b between a content of silicon atoms of the silicon alkoxide or a hydrolysate thereof (mass part a) and a content of the water-soluble polymer (mass part b) is 3/97 or more and 45/55 or less in mass ratio.

The present disclosure is directed to a web control guide for an inflation and sealing assembly of a protective packaging formation device for inflating a web material into a chain of inflated cushions. The web control guide is positioned along a material path at a transverse spacing from a first compression element and constrains a first thickness of the material path measured normal to the longitudinal and transverse directions of the material path. The transverse spacing and constrained thickness dimension are sufficiently small to prevent transverse movement of the flexible material towards the first compression element to avoid excessive heating of the web material outside a sealing zone.