Mitsubishi Gas Chemical Company, Inc.

Toshio Komatsu

Yoshiaki Inoue

Hideyuki Takahashi

Akira Amemiya

Yoshio Yoshikawa

Megumu Yuyama

Takanari Nawata

Yukio Kondoh

Teruo Takeuchi

Yasuo Sugihara

Takehiko Moriya

Akira Katada

Sadao Otsuka

Takashi Kashiba

Hidetoshi Hatakeyama

Hidechika Wakabayashi

Yoshikazu Morita

Akira Hosomi

Masayuki Ohtsuka

Syuji Wakamatsu

Yoshihiko Harima

Sadao Ohtsuka

The present invention relates to novel oxygen absorbent comprising as main ingredients a 1,2-glycol, glycerine or sugar alcohol with the oxygen absorbent materials.

Oxygen absorbent

A deoxidizer sheet suitable for preservation of goods such as foods is provided that has a first layer which essentially contains a deoxidation reaction main agent, such as mixture of iron powder and a metal halide, and a fixing material such as natural or synthetic fibers and heat-meltable resin fibers or powder. The deoxidizer sheet also has a pair of second layers heat-bonded to both surfaces of the first layer.

Deoxidizer sheet

A deoxidizer film for use in storage of food products or the like has a film body made of a thermoplastic resin in which a deoxidizer composition is dispersed. The film body is uni-axially or bi-axially drawn and has minute pores. The deoxidizer composition typically contains iron powder and a metal halide. The deoxidizer film can have a laminate structure in which the above-mentioned film body is laminated to a film body made of a thermoplastic resin and containing a filler which is insoluble in water or has a small solubility in water.

Deoxidizer film

There are disclosed an oxygen absorbent comprising boron or a reducing boron compound, an alkaline substance and a carrier, an oxygen absorbent parcel formed by enclosing said oxygen absorbent in a permeable packaging parcel, a food package and a package of a metallic or electronic product or part containing said oxygen absorbent parcel.

The present invention relates to an oxygen absorbent, and more particularly to an oxygen absorbent applicable to preservation of dry foodstuffs and medical drugs and to the rust prevention of metallic articles. Thus, the invention provides an oxygen absorbent comprising:

An oxygen scavenger container installed in a cap used for a liquid substance-containing vessel having an inner structure composed of an upper vacant compartment including a wall portion having at least one opening providing communication between the upper vacant compartment and the exterior of the scavenger container, a lower container compartment which contains the oxygen scavenger, and partition means provided to separate the upper compartment from the at least one opening and the lower container compartment, said partition means comprising single or plural sheets of gas permeable liquid-proof material to provide a double barrier between the oxygen scavenger and a liquid substance.

Oxygen scavenger container used for cap

In an oxygen absorbent packet, an oxygen absorbent containing moisture is received in the cup like plastic container and an air-permeable layer made of paper is adhered to the opening section of the container. A substantially air-impermeable layer is formed on the outer surface of the air-permeable layer, whereby the oxygen absorbent absorbs oxygen through the peripheral side edge of the air-permeable layer.

Oxygen absorbent packet

A method of manufacturing a gas permeable packaging material, which comprises the steps of forming a laminate composed of an outer plastic film and a gas permeable inner sheet with a first heat-sealable layer interposed therebetween, perforating the laminate with a number of micro-pores, which extend from the outer film side to at least the inner sheet, heat-sealing a second heat-sealable film with or without a number of small-pores to the inner sheet, and, if the second heat-sealable film is of no porous, forming a number of small-pores in the second heat-sealable film, a pore ratio of the second heat-sealable film being greater than that of the outer film.

Method for manufacturing gas permeable packaging material

A package containing therein an agent for retaining qualities of food products or the like. The material constituting the package comprises an outer layer made of a substantially gas-impermeable material, a first seal layer formed on the inner side of the outer layer, an inner layer formed on the inner side of the first seal layer, the inner layer allowing gas to pass through in the lateral direction thereof, and a gas-permeable second seal layer formed on the inner side of the inner layer. The peripheral portion of the second seal layer is adhered to each other to form a sealed package. The package has an exposed cross section of the inner layer, so that the environmental air can pass into the package to contact the quality-retaining agent through laterally the inner layer and then through the second seal layer.

Package containing quality-retaining agent

An oxygen absorbent packet comprising an oxygen absorbent packaged and sealed in a double packaging material 6 comprised of a gas-permeable outer material layer 1 composed of a plastic film or transparent paper, a gas-permeable sealing layer 2, an inner material layer 3 composed of gas-permeable paper or nonwoven cloth, and a gas-permeable sealing layer 4, and also containing an air layer 5 between layers and 1 and 2 or between layers 2 and 3.

A particulate or granular oxygen absorbent comprising at least one ascorbic compound selected from ascorbic acid, ascorbic acid salts or mixtures thereof, an alkali metal carbonate, an iron compound, carbon black and water and the absorbent coated with a finely divided powder are disclosed.

An oxygen absorbent package comprising a plastic microporous film or nonwoven fabric sheet 1 and a laminated sheet 2 comprising a plastic film 3 having a lower softening point than 1 and a plastic film 4 having a higher softening point than film 3, an oxygen absorbent 5 being put between 1 and 2 with film 3 forming the inner layer, the three layers being heat-sealed on the sides is disclosed. The oxygen absorbent is mainly used for storage of foodstuff, particularly liquid or semi-liquid foodstuff.

Oxygen absorbent packaging

An oxygen absorbent package comprising a rectangular nonwoven fabric sheet, a rectangular perforated film or nonwoven fabric sheet having a lower softening point than sheet, a rectangular microporous film or nonwoven fabric sheet having a higher softening point than film or sheet, and an oxygen absorbent, the three layers being heat sealed on the four sides is disclosed. The oxygen absorbent package is mainly used for storage of foodstuff, particularly liquid or semiliquid foodstuff.

An oxygen and carbon dioxide absorbent comprising (A) a particulate substance wherein the particles of a hydrous alkali substance are covered with separator particles, (B) iron powder and (C) an electrolyte and a process for storing coffee by using the same is disclosed.

Oxygen and carbon dioxide absorbent and process for storing coffee by

At least part of the material constituting the bag in which an oxygen absorbent is sealed is composed of a laminated sheet in which a gas permeable sheet is laminated to one or both sides of a microporous film to provide a lamination the two outside layers of which have different softening points, the layer having a lower softening point constituting the inner surface of the bag is disclosed. The bag of this invention can be produced at a high speed by using an ordinary heat-seal machine.

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Tokyo, Japan

Toshio Komatsu