Abstract: Provided is a multilayer vessel excellent in gas barrier performance and transparency and its application. The multilayer vessel contains a layer (X) that contains at least one type of polyolefin resin as the major ingredient; and a layer (Y) that contains a polyamide resin (A) as the major ingredient, the polyamide resin (A) being composed of a structural unit derived from diamine, and a structural unit derived from dicarboxylic acid, 70 mol % or more of the structural unit derived from diamine being derived from metaxylylenediamine, meanwhile 30 to 60 mol % of the structural unit derived from dicarboxylic acid being derived from straight chain aliphatic ?,?-dicarboxylic acid having 4 to 20 carbon atoms, and 70 to 40 mol % being derived from isophthalic acid.

Abstract: A pressure-reducing valve 1 includes a tubular valve body 3 movably accommodated in a housing 2, a valve seat 4 fixed inside the housing 2, and an urging member 5 that urges the valve body 3 in a direction separating from the valve seat 4. The valve seat 4 includes an annular elastic member (O-ring 42) capable of abutting against the valve body 3, an annular portion (inner ring portion 41b) that covers an outer periphery of the elastic member, an inner peripheral portion 43b disposed on an inner periphery of the elastic member, a connecting portion (closing plate portion 43a) that connects the annular portion and the inner peripheral portion 43b, and a detachment prevention portion provided in at least one of the inner peripheral portion 43b and the annular portion on a valve body side to prevent the elastic member from detaching from the annular portion.

Abstract: A method for producing a sterilized oxygen-absorbing multilayer body is provided. The method may include: irradiating with radiation an oxygen-absorbing multilayer body comprising at least an oxygen-absorbing layer containing a transition metal catalyst and a thermoplastic resin (a) having a tetralin ring as a structural unit and a layer containing a thermoplastic resin (b); and heating the oxygen-absorbing multilayer body which has been irradiated with radiation in the sterilizing step at a temperature of the glass transition temperature of the thermoplastic resin (a) minus 20° C. or more and lower than the glass transition temperature of the thermoplastic resin (a) for 50 hours or more.

Abstract: A syringe barrel including a cylindrical main body including an injection section and an insertion section, in which the cylindrical main body includes a layered structure, and a surface roughness of an inner surface of the cylindrical main body is 4 nm to 25 nm in terms of arithmetic average roughness (Ra).

Abstract: A method for producing a sterilized oxygen-absorbing multilayer body is provided. The method may include: irradiating with radiation an oxygen-absorbing multilayer body comprising at least an oxygen-absorbing layer containing a transition metal catalyst and a thermoplastic resin (a) having a tetralin ring as a structural unit and a layer containing a thermoplastic resin (b); and heating the oxygen-absorbing multilayer body which has been irradiated with radiation in the sterilizing step at a temperature of the glass transition temperature of the thermoplastic resin (a) minus 20° C. or more and lower than the glass transition temperature of the thermoplastic resin (a) for 50 hours or more.

Abstract: Provided is a multilayer vessel excellent in gas barrier performance and transparency and its application. The multilayer vessel contains a layer (X) that contains at least one type of polyolefin resin as the major ingredient; and a layer (Y) that contains a polyamide resin (A) as the major ingredient, the polyamide resin (A) being composed of a structural unit derived from diamine, and a structural unit derived from dicarboxylic acid, 70 mol % or more of the structural unit derived from diamine being derived from metaxylylenediamine, meanwhile 30 to 60 mol % of the structural unit derived from dicarboxylic acid being derived from straight chain aliphatic ?,?-dicarboxylic acid having 4 to 20 carbon atoms, and 70 to 40 mol % being derived from isophthalic acid.

Abstract: Oxygen-absorbing resin composition comprising a polyester containing a constitutional unit (a) comprising tetralin ring structure, for example, an alkyl tetralin dicarboxylate, wherein the alkyl component has, for example, from 2 to 6 carbon atoms, and a constitutional unit (b) derived from a polyfunctional compound, selected from glycerin, trimethylol propane, pentaerythritol, trimellitic acid, trimellitic acid anhydride, pyromellitic acid, and pyromellitic acid anhydride, and a transition metal catalyst.

Abstract: Provided is an oxygen-absorbing multilayer body including an oxygen-absorbing layer containing an oxygen-absorbing composition and a thermoplastic resin layer containing a thermoplastic resin (b), wherein the oxygen-absorbing composition includes at least one compound having a tetralin ring represented by Formula (1), a transition metal catalyst, and a thermoplastic resin (a).

Abstract: An oxygen-absorbing resin composition containing a polyester compound, and a transition metal catalyst, and wherein the polyester compound is a polyester compound having a tetralin ring obtained by synthesis using a zinc compound contained in a catalyst; the zinc compound contained in a catalyst is present together with the obtained polyester compound in the oxygen-absorbing resin composition; the transition metal catalyst is different from the zinc compound contained in a catalyst; and the oxygen-absorbing resin composition is obtained by mixing the transition metal catalyst with the polyester compound present together with the zinc compound contained in a catalyst.

Abstract: Oxygen-absorbing resin composition, not responsive to a metal detector, producing no odor after absorption of oxygen and has excellent oxygen-absorbing performance in a wide range of humidity conditions from low to high humidity. An oxygen-absorbing molded article, and a multilayer body, container, injection-molded article and medical containers also provided. The oxygen absorbing resin composition contains a polyester, comprising at least one constituent unit having a tetralin ring component compound, a transition metal catalyst, and a catalyst for producing the polyester. The oxygen-absorbing molded article of the present invention can be formed by molding the oxygen-absorbing resin composition into a film or a sheet. The multilayer body, container, injection-molded article, medical container, etc. of the present invention are obtained by using the oxygen-absorbing resin composition.

Abstract: Provided are a novel oxygen-absorbing resin composition not responsive to a metal detector, producing no odor after absorption of oxygen and having excellent oxygen-absorbing performance, and a multilayer body, container, injection-molded article and medical container using these. Further provided are an oxygen-absorbing resin composition etc. having excellent oxygen-absorbing performance in a wide range of humidity conditions from low humidity to high humidity. The oxygen-absorbing resin composition of the present invention is an oxygen-absorbing resin composition containing a polyamide compound and a transition metal catalyst, wherein the polyamide compound has at least one constituent unit having a tetralin ring. Moreover, the multilayer body, container, injection-molded article, medical container, etc. of the present invention are obtained by using the oxygen-absorbing resin composition of the present invention.

Abstract: An oxygen absorbent composition which comprises a polyester oligomer containing a constitutional unit derived from a tetralin ring-containing carboxylic acid and a diol, wherein the polyester oligomer has a number average molecular weight of 500 to 10000, and a transition metal catalyst comprising at least one transition metal selected from the group consisting of manganese, iron, cobalt, nickel and copper.

Abstract: Provided is a novel oxygen-absorbing resin composition having excellent oxygen-absorbing performance and suppressing odor generation after absorption of oxygen even if a material responsive to a metal detector is not used. Further provided is an oxygen-absorbing resin composition having excellent oxygen-absorbing performance in a wide range of humidity conditions from low humidity to high humidity. Such an oxygen-absorbing resin composition contains a copolymerized polyolefin compound and a transition metal catalyst, in which the copolymerized polyolefin compound contains at least one constituent unit having a tetralin ring.

Abstract: The provision of an oxygen absorbent composition comprising a compound (A) having two or more tetralin rings, at least one of the tetralin rings having a hydrogen bond bonded to a benzylic position thereof, and having two or more imide bonds, and a transition metal catalyst.

Abstract: The present invention provides a sterilized oxygen-absorbing resin composition obtained by performing at least: a sterilizing step of irradiating with radiation an oxygen-absorbing resin composition containing a transition metal catalyst and a thermoplastic resin (a) having a tetralin ring as a constituent unit; and a step of heating the oxygen-absorbing resin composition at a temperature equal to or higher than the glass transition temperature of the thermoplastic resin (a) and equal to or lower than 200° C., after the sterilizing step.

Abstract: The present invention provides a sterilized oxygen-absorbing resin composition obtained by performing at least: a sterilizing step of irradiating with radiation an oxygen-absorbing resin composition containing a transition metal catalyst and a thermoplastic resin (a) having a tetralin ring as a constituent unit; and a step of heating the oxygen-absorbing resin composition at a temperature equal to or higher than the glass transition temperature of the thermoplastic resin (a) and equal to or lower than 200° C., after the sterilizing step.

Abstract: The oxygen absorbent composition of the present invention at least contains a polyester oligomer containing a constitutional unit having a predetermined tetralin ring and a transition metal catalyst. It is preferable that the oxygen absorbent composition of the present invention further contains a thermoplastic resin.

Abstract: An oxygen-absorbing resin composition containing a polyester compound and a transition metal catalyst, wherein the polyester compound has at least one constituent unit having a tetralin ring selected from the group consisting of constituent units represented by general formulas (1) to (4) and wherein the polyester compound is a polyester compound having a tetralin ring obtained by synthesis using a zinc compound.

Abstract: The provision of an oxygen absorbent composition comprising a compound (A) having two or more tetralin rings, at least one of the tetralin rings having a hydrogen bond bonded to a benzylic position thereof, and having two or more imide bonds, and a transition metal catalyst.

Abstract: The oxygen-absorbing resin composition of the present invention at least contains a polyester compound containing a constitutional unit (a) having a predetermined tetralin ring and a constitutional unit (b) derived from a predetermined polyfunctional (trivalent or more) compound, and a transition metal catalyst.