An ethylene-vinyl alcohol copolymer composition contains: (A) an ethylene-vinyl alcohol copolymer; (B) an antioxidant; and (C) a sorbic acid ester; wherein the sorbic acid ester (C) is present in an amount of 0.00001 to 10 ppm based on the weight of the ethylene-vinyl alcohol copolymer composition; wherein the weight ratio (B)/(C) of the antioxidant (B) to the sorbic acid ester (C) is 500 to 1,000,000. The resulting ethylene-vinyl alcohol copolymer composition is less susceptible to coloration.

A sealing element for heat sealing packaging material for producing sealed packages comprises a heating element arranged to heat-seal the packaging material so as to form the sealed packages and a groove arranged to be engaged by a cutting element carried by a counter-sealing element interacting with the sealing element during a cutting operation in which a sealed package is separated from a portion of the packaging material, wherein the sealing element further comprises a resilient element received within the groove so as to prevent clogging particles from entering into the groove.

A sealing element for heat sealing packaging material for producing sealed packages comprises a heating element arranged to heat-seal the packaging material so as to form the sealed packages and a groove arranged to be engaged by a cutting element carried by a counter-sealing element interacting with the sealing element during a cutting operation in which a sealed package is separated from a portion of the packaging material, wherein the sealing element further comprises a resilient element received within the groove so as to prevent clogging particles from entering into the groove.

The present invention is a double-walled container manufacturing method in which when a pair of partial molds is brought towards each other to be assembled to form a split mold, at least a portion of the mating surfaces of the pair of partial molds clamp a parison at two side portions that are at horizontal positions facing each other. The method is able to manufacture the container easily with a molding device that does not differ significantly from the past and, in a double-walled container obtained from a relatively rigid outer container and a flexible inner container the volume of which can change according to the amount of contents filled inside said outer container, an opening for introducing outside air can be formed very easily and reliably at a lower cost than the processing cost of prior art.

A manufacturing method of double walled container comprises preparing a parison having a rigid outer layer and a flexible inner layer, enclosing the parison within a mold including split mold halves, thereby forming a molded parison including a pre-blow cylindrical section, a pre-blow conical bottom section, a pre-blow bottom projection, and a lower parison excessive burr, blowing gas into an inside of the molded parison, thereby forming a blown parison including a cylindrical section and a bottom section, the bottom section including a bottom projection, and removing the lower parison excessive burr from the blown parison, wherein the flexible inner layer is fixed to the rigid outer layer in the bottom projection.

The present embodiments provide an apparatus for producing a pressure vessel blank, comprising at least one connection element, a multi-part blow-moulding tool, and at least one blowing pin. The present embodiments further provide a pressure vessel comprising at least one connection element, a pressure vessel blank, and a supporting shell connected to and supporting the pressure vessel blank. An aspect of the present embodiments provides a process for producing a pressure vessel blank using an apparatus comprising at least one connection element that enables a shortened time for producing a pressure vessel blank with increased stability under pressure.

A filler tube, which is capable of satisfying required functions suitably in compliance with the bellows and non-bellows cylindrical base while securing weld strength and fuel-permeation resistance property in the weld face, is provided. A filler tube includes a non-bellows cylindrical base with a total thickness of from 2 to 4 mm, a bellows with a total thickness of from 0.5 to 3 mm, and a flange having a total thickness of from 3.5 to 5 mm, and including an end face to be welded to a fuel tank. The non-bellows cylindrical base, the bellows, and the flange include inner layers formed so as to have a thickness accounting for from 40 to 60% of the total thicknesses, and formed of high-density polyethylene (or HDPE) serving as the major constituent, intermediate layers exhibiting fuel-permeation resistance property, and outer layers protecting the intermediate layers.

A preform for an integrally blow-moulded bag-in-container uses an inner layer and an outer layer, wherein the preform forms a two-layer container upon blow-moulding, and wherein the obtained inner layer of the container releases from the thus obtained outer layer upon introduction of a gas at a point of interface between the two layers. At least one of the inner and outer layers includes at least one additive allowing both inner and outer layers to reach their respective blow-moulding temperatures substantially simultaneously.

A device comprises a first seal member, a second seal member, a first circuit member, a second circuit member and one or more compressive members. The first seal member has a first outer portion having a first seal portion, and a first inner portion located inward of the first outer portion. The second seal member has a second outer portion having a second seal portion, and a second inner portion located inward of the second outer portion. The first seal portion and the second seal portion are bonded together. The first circuit member and the second circuit member are shut in a closed space which is enclosed by the first inner portion and the second inner portion. One of the compressive members is located between the first seal member and the first circuit member or located between the second seal member and the second circuit member.

A device comprises a first seal member, a second seal member, a first circuit member, a second circuit member and one or more compressive members. The first seal member has a first outer portion having a first seal portion, and a first inner portion located inward of the first outer portion. The second seal member has a second outer portion having a second seal portion, and a second inner portion located inward of the second outer portion. The first seal portion and the second seal portion are bonded together. The first circuit member and the second circuit member are shut in a closed space which is enclosed by the first inner portion and the second inner portion. One of the compressive members is located between the first seal member and the first circuit member or located between the second seal member and the second circuit member.