[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 foam-molded product including a foam layer, and a skin layer covering the foam layer, in which the maximum diameter of bubbles in the foam layer is 0.90 mm or less; and a method for manufacturing a foam-molded product and a method for suppressing an appearance defect of a foam-molded product, including an injection process and a foaming process, wherein the foam-molded product after molding includes a foam layer and a skin layer covering the foam layer, the skin layer having an average thickness of from 0.3 mm to 0.7 mm, and wherein expanding of the volume of the cavity includes performing a core-back process of the mold such that a thickness of the foam-molded product after molding is within ±0.2 mm of a predetermined target thickness.

This disclosure includes high-temperature, thermally-insulative laminates, Some laminates have a front surface, a back surface, one or more heat-dispersing layers, each comprising at least 90% by weight of: a metal having a melting point of at least 1,300° C. and a thermal conductivity of at least 15 W/Km; or graphite, and one or more heat-insulating layers coupled to the heat-dispersing layer(s), the heat-insulating layer(s) each including a layer of polymeric aerogel, wherein at least a majority of the front surface is defined by one of the heat-dispersing layer(s).

In at least one embodiment, a building material comprising a porous membrane having a moderate to high water vapor permeability and high liquid water penetration resistance is disclosed. The building material may be used in building applications, including as or as part of a building wrap, a rain screen, a roofing underlayment, a flashing, a sound proofing material, or an insulation material. The porous membrane may include at least one thermoplastic polymer, at least one filler, and at least one processing oil. The porous membrane may be flat or may have ribs. The porous membrane may include at least one scrim component.

Provided is a functional laminate including a porous intermediate layer having air permeability laminated between a porous surface layer and a resin foamed layer, the porous intermediate layer having an affinity to a foaming resin forming the resin foamed layer.

A method of forming a polyisocyanurate foam board includes providing a polyol and adding an isocyanate to the polyol to form a polyisocyanurate foam. A first inner surface of a first facer material is treated with a first flow of hydroxyl containing molecules. A second inner surface of a second facer material is treated with a second flow of hydroxyl containing molecules. The polyisocyanurate foam is coupled to the first treated inner surface and the second treated inner surface such that the polyisocyanurate is sandwiched between the first facer material and the second facer material, thereby exposing opposing outer surfaces of the polyisocyanurate foam to the hydroxyl containing molecules. A density of a medial portion of the polyisocyanurate foam is greater than a density of the polyisocyanurate at the opposing outer surfaces.

A composite structure includes a foam core formed from a first polymer and between about 0.5 wt. % and about 2.5 wt. % graphene. The foam core has an average pore size between about 25 μm and about 75 μm, and a cell density between about 4×10.sup.6 cells/mm.sup.2 and about 6×10.sup.6 cells/mm.sup.2. Also, an overmolded skin formed from a second polymer and between about 0.25 wt. % and about 5.0 wt. % graphene is disposed on the foam core. A method of manufacturing a composite structure includes injection molding a foam core from a first polymer containing between about 0.25 wt. % and about 5.0 wt. % graphene, and injection molding an overmolded skin from a second polymer containing graphene between about 0.25 wt. % and about 5.0 wt. % graphene.

A method is provided for making a microcellular shoe stiffener has first and second adhesive layers coextruded on opposite first and second surfaces of a stiffener core. The stiffener core may include a recycled polymeric material. Nitrogen in a supercritical fluid state is introduced into the extruder for the stiffener core to produce a closed cell foam with a gaseous component. The gas reduces the weight and cost of the stiffener without significantly reducing stiffness and resiliency.

A base layer for use in hazardous environments, such as smoky environments, the base layer (1) comprising a composite fabric (100) comprising a breathable membrane layer (101) having a multiplicity of pores and a breathable fire-retardant fabric layer (102,103) having a multiplicity of openings, the breathable membrane layer laminated on at least one side to the breathable fire-retardant fabric layer with an adhesive (104,105).

A resin sheet includes a porous structure. The porous structure is configured to adjust transmission of a millimeter wave. The porous structure has a relative permittivity varying in stages in a thickness direction of the resin sheet from a plane on which the millimeter wave is incident, the relative permittivity varying such that a difference between average relative permittivities in two adjacent layer portions is a predetermined value or less, the layer portions each having a particular thickness smaller than a wavelength of the millimeter wave. The porous structure has, as pores, only pores each having a pore diameter equal to or less than 10% of the wavelength of the millimeter wave.