Provided is a pneumatic tire having improved air permeability resistance by improving adhesive property between an inner liner and a tire component adjacent thereto, reduced rolling resistance, and improved low temperature durability. The inner liner is composed of a polymer layer stack including a first layer containing an SIBS and a second layer containing at least one of an SIS and an SIB. At least one of the first layer and the second layer is a polymer composition containing one of a C4 polymer obtained by polymerizing a monomer unit having 4 carbon atoms, a layered clay mineral with an organic compound intercalated therein and at least one kind of rubber component selected from the group consisting of a natural rubber, an isoprene rubber and a butyl rubber. The second layer is arranged to come into contact with a rubber layer of the carcass ply. The inner liner has a thickness Ge at a shoulder position Pe exceeding 100% and being less than or equal to 500% of a thickness Gc at a crown central position Pc.

A method for performing an infrared treatment includes the steps of receiving an extruded product and feeding the extruded product to an oven including at least one lamp unit. The lamp unit includes a lamp, a reflective surface enclosing a first side of the lamp and positioned to direct radiation from the lamp, and a glass disposed between a second side of the lamp and an extruded product, wherein the glass separates the lamp and the extruded product. The method further includes the step of creating cross-linking between layers of the extruded product by directing the radiation at the extruded product. Still further, the method includes the steps of directing a first gas flow at a surface of the product and directing a second gas flow at the glass.

A paperboard substrate that can be used to provide a food packaging particle is provided having a water vapor barrier layer comprising HDPE in combination with a nucleating agent which is extruded on to a paperboard substrate. The resulting substrate has sufficiently good water vapor barrier when properties that dry foods such as cereals do not require a bag or inner liner as a separate moisture barrier.

A method of forming a confined crystallization multilayer film includes coextruding a plurality of first polymer layers and a plurality of second polymer layer to form a multilayer film wherein each first polymer layer is sandwiched between second polymer layers and axially orienting the multilayer film at a temperature below the melting temperature (T.sub.m) of the second polymer layer and to a thickness such that each first polymer layer forms a high aspect ratio substantially crystalline lamellae.

A rubber foam tube (5) is produced by extruding a rubber composition into a tubular body (4) and feeding the tubular body (4) in an elongated state without cutting to pass the tubular body (4) through a microwave crosslinking device (8) and then through a hot air crosslinking device (9) for continuously foaming and crosslinking the rubber composition. At this time, a ratio V2/V1 between a speed V2 at which the tubular body (4) passes through the hot air crosslinking device (9) and a speed V1 at which the tubular body (4) passes through the microwave crosslinking device (8) is not less than 1.0 and not greater than 1.6.

A plant for producing an extruded silicone intermediate has a mixer/extruder for mixing and subsequently extruding a silicone compound for producing a raw silicone extrudate. A heating apparatus of the plant serves for crosslinking the raw extrudate to give the crosslinked silicone intermediate. The result is a plant with which a silicone intermediate of this kind can be produced more economically.