Mitsubishi Gas Chemical Company, Inc.

Takashi Kashiba

Teruo Takeuchi

Yasuo Sugihara

Hidetoshi Hatakeyama

Toshio Komatsu

Satoshi Okada

Shinpei Iwamoto

Shota Arakawa

Kenichiro Usuda

Shinichi Ikeda

Ryoji Otaki

Hideyuki Takahashi

Masayoshi Takahashi

Shun Ogawa

Toshiya Takagi

Fumihiro Ito

Akihiro Masuda

Shuta Kihara

Eiichi Honda

Takeshi Hirokane

Yoshiki Ito

Takaaki Kutsuna

Shigeyuki Hirose

Shinichi Yonehama

Kiyonori Michiba

Hisafumi Ito

Toshiya Naito

The present invention provides a manufacturing method of a syringe barrel capable of securing smoothness of a nozzle tip and productivity. A manufacturing method of a syringe barrel that is injection-molded from a nozzle tip comprises cutting a remaining gate at a nozzle part using an ultrasonic cutting apparatus having a mechanism for suppressing abnormal vibrations.

Manufacturing method of syringe barrel

An oxygen absorbing multilayer container having at least three layers of a first resin layer containing a thermoplastic resin, an oxygen absorbing layer containing an oxygen absorbing resin composition which contains a polyester compound (a) containing a constituent unit having a tetralin ring and a transition metal catalyst, and a second resin layer containing the same type of thermoplastic resin as the thermoplastic resin contained in the first resin layer, in this order, in which a cycloolefin polymer having a glass transition temperature of 50 to 110&#xb0; C. is contained as the thermoplastic resin.

Oxygen absorbing multilayer container and method for producing the same

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). 

Oxygen-absorbing multilayer body, oxygen-absorbing container, oxygen-absorbing airtight container, oxygen-absorbing push-through pack, and storage method using same

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.

Oxygen-absorbing resin composition and oxygen-absorbing molded article using same and multilayer body, container, injection-molded article and medical container using these

Provided is an oxygen-absorbing medical multilayer container including at least three layers including a first resin layer containing a thermoplastic resin (b1), an oxygen-absorbing layer containing an oxygen-absorbing composition, and a second resin layer containing a thermoplastic resin (b2), in this order, where the oxygen-absorbing composition contains at least one compound having a tetralin ring represented by Formula (1), a transition metal catalyst, and a thermoplastic resin (a).

Oxygen-absorbing medical multilayer container and method for storing biological medicine

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.

Oxygen-absorbing resin composition, and multilayer body, container, injection-molded body, and medical container using same

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.

Oxygen-absorbing resin composition and oxygen-absorbing multilayer body using same, and molded article and medical container using these

The present invention provides a novel oxygen absorbent composition being capable of realizing an oxygen absorbent not responding to a metal detector, being suppressed in the increase of the odor intensity after the absorption of oxygen and having an excellent oxygen absorption performance over a wide range of humidity conditions from low humidity to high humidity, and provides an oxygen absorbent package using the oxygen absorbent composition. The oxygen absorbent composition of the present invention includes at least one compound having a tetralin ring represented by the following general formula (1) and a transition metal catalyst: 

Oxygen absorbent composition and oxygen absorbent package using the same

Provided is a resin composition which is excellent in an oxygen-absorbing performance, a resin strength and a resin processability. The oxygen-absorbing resin composition is characterized by containing a polyolefin resin, a transition metal catalyst and a polyamide resin obtained by polycondensation of aromatic diamine and dicarboxylic acid, wherein an end amino group concentration of the above polyamide resin is 30 &#x3bc;eq/g or less, and a total content of the transition metal catalyst and the polyamide resin is 15 to 60% by weight based on a whole amount of the oxygen-absorbing resin composition.

Oxygen-absorbing resin composition

There is disclosed an oxygen-absorbing multi-layer film which comprises an outer layer comprising a thermoplastic resin; an adhesive layer comprising an epoxy resin; an oxygen-absorbing layer comprising a thermoplastic resin and an iron based oxygen-absorbing agent incorporated therein; and a heat sealing layer comprising an oxygen-permeable thermoplastic resin, wherein the adhesive layer comprises a gas barrier epoxy resin composition containing at least 30% by weight, preferably 40 to 90% by weight of a xylylenediamine unit (N&mdash;CH &mdash;C H &mdash;CH &mdash;N). The multi-layer film preferably having an overall thickness of at most 120 micron is excellent in oxygen-absorbing function, gas barrier properties, impact resistance, film rigidity and economical efficiency, and is well suited for use as packaging materials for food, pharmaceutical and the like.

Oxygen-absorbing multi-layer film

An oxygen-absorbing multi-layer laminate suitable for preserving food, etc. due to its excellent ability of retaining flavor and taste of food, a method of efficiently producing the oxygen-absorbing multi-layer laminate and a packaging container made of the oxygen-absorbing multi-layer laminate. The oxygen-absorbing agent is interspersed between a first thermoplastic resin layer and a second thermoplastic resin layer, or sandwiched between the integrally bonded first and second thermoplastic resin layers. In the oxygen-absorbing multi-layer laminate having at least three thermoplastic resin layers, the oxygen-absorbing agent is interspersed or interposed between the adjacent layers of at least one adjacent pair. With such a construction, the oxygen-absorbing ability is improved to prolong the storage life of retaining flavor and taste of food.

Oxygen-absorbing multi-layer laminate, production method thereof and packaging container

An oxygen absorbing multi-layer film which comprises a first outer surface comprising an uncolored oxygen permeating layer comprising an oxygen permeating polyolefin which does not contain a pigment; a colored concealing, oxygen permeating layer disposed under the uncolored oxygen permeating layer the color concealing, oxygen permeating layer comprising an oxygen permeating polyolefin and a pigment; a second outer surface disposed opposite to the first outer surface, the second outer surface comprising a gas barrier layer and an oxygen absorbing layer disposed between the colored concealing, oxygen permeating layer and the gas barrier layer the oxygen absorbing layer being made of an oxygen absorbing resin composition comprising an iron-containing deoxidizing agent and an oxygen permeating polyolefin. The oxygen absorbing multi-layer film can be used as a packaging material and has desirable strength, heat resistance, heat-sealing properties, hot tack properties and appearance. An oxygen absorbing packaging container can be made of the oxygen absorbing multi-layer film.

Oxygen absorbing multi-layer film and oxygen absorbing packaging container

An oxygen absorber is provided which is obtainable by mixing 10 to 60 parts by weight of a particulate thermoplastic resin having a softening point of 90 to 125.degree. C. and a particle diameter of 1 to 500 .mu.m with 100 parts by weight of an oxygen absorbing composition containing an ascorbic acid compound, water and an activated carbon. The oxygen absorber can inhibit overheat to prevent spontaneous ignition. Further, the activated carbon has a particle diameter of 0.1 to 2 mm and the ascorbic acid compound includes L-ascorbic acid, sodium L-ascorbate, calcium L-ascorbate and sodium D-iso-ascorbate.

Oxygen absorber for culturing anaerobic bacteria

An atmosphere regulator which comprises 100 parts by weight an oxygen absorber comprising an ascorbic acid compound, a metallic salt, water and an activated carbon, and 5 to 20 parts by weight of an alkaline earth metal hydroxide. The atmosphere regulator has a pH, as measured in accordance with JIS K1474, of 10 to 12.5. The atmosphere regulator can promptly change the atmosphere in a system into an anaerobic state and has a function for stably generating a carbon dioxide gas. The atmosphere regulator does not bring about any deterioration of performance, even when stored for a long period of time, and is compact for good receivability. Anaerobic bacteria can be cultured by the use of the atmosphere regulator.

Atmosphere regulator and method for culturing anaerobic bacteria

An oxygen absorbing resin in which a deoxidizing composition is dispersed in a thermo-plastic resin mixture comprising (A) a thermoplastic elastomer and/or an ethylene propylene copolymer and (B) a thermo-plastic resin other than the above-mentioned (A), and having a flexural modulus of 600 MPa or less and an oxygen permeability of 130 cc.mm/m.sup.2.atm.day (23.degree. C., 50% RH) or more. The oxygen absorbing resin has an oxygen absorbing performance equal to that of a conventional deoxidizing agent in a small bag. A deoxidizing multi-layer structure which comprises a layer (I) comprising a thermoplastic resin layer having an oxygen permeability of 800 cc/m.sup.2.atm.day (23.degree. C., 50% RH) or more, a layer (II) comprising the oxygen absorbing resin, and a layer (III) having gas barrier properties. In addition, the deoxidizing multi-layer structure has a function of positively and efficiently absorbing oxygen.

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Kanagawa, Japan

Takashi Kashiba