Abstract: At least one of an obverse surface film and reverse surface film, which are used to together constitute a plastic pouch, is folded back across the entire width of the plastic pouch, and peripheral edge portions of the pouch are heat-sealed, to thereby form, on at least one position, a folded-back section communicating with the body of the pouch.

Abstract: Provided is a packaging pouch for a microwave oven, provided with a steam releasing seal portion having a weakened portion, in which no clogging occurs in the steam releasing seal portion at the time of heat-cooking in a microwave oven, and any clogging occurred can be automatically eliminated. In the present invention, hermetic sealing is effected through heat sealing of a plastic film, and at least one steam releasing seal portion having a weakened portion is provided, with a width of the weakened portion gradually increasing from a forward end portion thereof to be opened toward a rear end portion thereof.

Abstract: A packaging container which includes a synthetic resin container body having a flange part and the cover member heat-sealed to the flange part of the container body. The cover member includes (1) an upper member in which inner surfaces of resin films are positioned opposite to each other to form an abutted part, an unsealed part communicating with the inside of the container body is formed by heat-sealing a peripheral edge part of the abutted part excluding one side of the abutted part forming a base part, and the steam releasing seal part is formed at the abutted part and (2) a lower member which covers a lower surface of the upper member and in which a steam guide part communicating with the inside of the container body is formed at or near the base part of the abutted part.

Abstract: At least one of an obverse surface film and reverse surface film, which are used to together constitute a plastic pouch, is folded back across the entire width of the plastic pouch, and peripheral edge portions of the pouch are heat-sealed, to thereby form, on at least one position, a folded-back section communicating with the body of the pouch.

Abstract: Provided are a packaging container for a microwave oven that excels in the sealing performance between a container body and lid, and that at heating/cooking by a microwave oven, maintains the internal pressure of the container for a given period of time to thereby enhance the taste of contents through steaming effect, and that thereafter, can spontaneously open with certainty from a steam releasing seal part; and an efficient process for manufacturing the packaging container. In the packaging container for microwave oven having a lid heat-sealed to the periphery of a flange part of container body made of a synthetic resin so as to attain hermetic sealing, at least one steam releasing seal part with a weakened part is disposed inside the peripheral seal part of the flange part at a position separate from the peripheral seal part.

Abstract: At least one of an obverse surface film and reverse surface film, which are used to together constitute a plastic pouch, is folded back across the entire width of the plastic pouch, and peripheral edge portions of the pouch are heat-sealed, to thereby form, on at least one position, a folded-back section communicating with the body of the pouch.

Abstract: An inexpensive packaging pouch for use in a microwave oven, in which the packaging pouch can be prevented from opening at the base part of a branch section when used for retorting or for cooking in the microwave oven, and pressure in the packaging pouch can be automatically released when the pouch is used for cooking in the microwave oven. A packaging pouch for microwave oven hermetically sealed by heat-sealing a plastic film is provided with a branch section, and a vapor release seal part having at least one weakened part is formed at the branch section. Opening preventive means are provided at the branch section and inside a peripheral edge seal part, facing the branch section, of a packaging pouch body.

Abstract: Provided is a packaging pouch for a microwave oven, provided with a steam releasing seal portion having a weakened portion, in which no clogging occurs in the steam releasing seal portion at the time of heat-cooking in a microwave oven, and any clogging occurred can be automatically eliminated. In the present invention, hermetic sealing is effected through heat sealing of a plastic film, and at least one steam releasing seal portion having a weakened portion is provided, with a width of the weakened portion gradually increasing from a forward end portion thereof to be opened toward a rear end portion thereof.

Abstract: A packaging container for cooking by an electronic oven having high sealability between a container body and a cover member and capable of being automatically and securely opened starting at a steam releasing seal part after taste of contents is improved by a steaming effect by holding a pressure in the packaging container for a specified time when the contents are heated and cooked by the electronic oven. The packaging container comprises a synthetic resin container body having a flange part and the cover member heat-sealed to the flange part of the container body.

Abstract: Provided are a packaging container for a microwave oven that excels in the sealing performance between a container body and lid, and that at heating/cooking by a microwave oven, maintains the internal pressure of the container for a given period of time to thereby enhance the taste of contents through steaming effect, and that thereafter, can spontaneously open with certainty from a steam releasing seal part; and an efficient process for manufacturing the packaging container. In the packaging container for microwave oven having a lid heat-sealed to the periphery of a flange part of container body made of a synthetic resin so as to attain hermetic sealing, at least one steam releasing seal part with a weakened part is disposed inside the peripheral seal part of the flange part at a position separate from the peripheral seal part.

Abstract: At least one of an obverse surface film and reverse surface film, which are used to together constitute a plastic pouch, is folded back across the entire width of the plastic pouch, and peripheral edge portions of the pouch are heat-sealed, to thereby form, on at least one position, a folded-back section communicating with the body of the pouch.

Abstract: An inexpensive packaging bag for use in a microwave oven, in which the packaging bag can be prevented from opening at the base part of a branch section when used for retorting or for cooking in the microwave oven, and pressure in the packaging bag can be automatically released when the bag is used for cooking in the microwave oven. A packaging bag for microwave oven hermetically sealed by heat-sealing a plastic film is provided with a branch section, and a vapor release seal part having at least one weakened part is formed at the branch section. Opening preventive means are provided at the branch section and inside a peripheral edge seal part, facing the branch section, of a packaging bag body.