Abstract: The embodiment provides a heat-sealing apparatus and a method of accurately controlling heat sealing temperature by measuring the temperature using a heat-sealing apparatus which heat-seals a pair of heat seal materials by nipping them between a pair of heating bodies. The method of heat-sealing includes mounting a cover material on the surface of at least one of the heating bodies to be in contact with the heat seal material, attaching a minute temperature sensor to the surface of the cover material on the side to be in contact with the heat seal material, and controlling temperature of welding face by the temperature detected by the minute temperature sensor, and an apparatus therefor.

Abstract: A heat-sealing apparatus for forming a composite heat seal structure, includes a belt conveying, heating and press bonding portion configured to convey and heat a heat seal material to form a band-shaped peelable seal, and a die roll press bonding portion configured to add a linear peelable seal to the band-shaped peelable seal in a longitudinal direction of the band-shaped peelable seal for forming the composite heat seal structure.

Abstract: A compound heat seal structure that, when heat-sealing a bag with a stacked area level difference, reliably seals even a section having different level and that can be easily opened. A compound heat seal structure is provided as a peelable seal in a band shape on a bag and a linear heat seal is added as a peelable seal in that band-shaped peelable heat seal in the longitudinal direction thereof.

Abstract: The embodiment provides a heat-sealing apparatus and a method of accurately controlling heat sealing temperature by measuring the temperature using a heat-sealing apparatus which heat-seals a pair of heat seal materials by nipping them between a pair of heating bodies. The method of heat-sealing includes mounting a cover material on the surface of at least one of the heating bodies to be in contact with the heat seal material, attaching a minute temperature sensor to the surface of the cover material on the side to be in contact with the heat seal material, and controlling temperature of welding face by the temperature detected by the minute temperature sensor, and an apparatus therefor.

Abstract: A heat-sealing apparatus for forming a composite heat seal structure, includes a belt conveying, heating and press bonding portion configured to convey and heat a heat seal material to form a band-shaped peelable seal, and a die roll press bonding portion configured to add a linear peelable seal to the band-shaped peelable seal in a longitudinal direction of the band-shaped peelable seal for forming the composite heat seal structure.

Abstract: A compound heat seal structure that, when heat-sealing a bag with a stacked area level difference, reliably seals even a section having different level and that can be easily opened. A compound heat seal structure is provided as a peelable seal in a band shape on a bag and a linear heat seal is added as a peelable seal in that band-shaped peelable heat seal in the longitudinal direction thereof.

Abstract: A compound heat seal structure that, when heat-sealing a bag with a stacked area level difference, reliably seals even a section having different level and that can be easily opened. A compound heat seal structure is provided as a peelable seal in a band shape on a bag and a linear heat seal is added as a peelable seal in that band-shaped peelable heat seal in the longitudinal direction thereof.

Abstract: A method of forming a composite seal structure having great resistance to rupture, rare generation of pinholes is provided which comprises using a heat sealer having two blocks which presses sheets to be heat-sealed and at least one of which is a heating block provided with a seat which renders its surface at a temperature forming peel seal, on a part of its surface pressing the sheets, heating the heating block at a temperature forming tear seat, and pressing the sheets to form a heat seal having the composite seal structure of peel seal and tear seal.

Abstract: This invention provides a method of designing a suitable heat seal width which is more resistant to unsealing than conventional heat-sealing, which involves the steps of; (1) heat-sealing a test piece of a sheet to be heat-sealed at a temperature lower than the fusion temperature of a heat seal portion of the sheet, (2) heat-sealing another test piece of the sheet at a temperature at or higher than the fusion temperature, (3) pulling to peel a heat-sealed portion of each test piece, and measuring the pull strength variation with peel length, (4) calculating the peel energy in various peel length as of the test piece heat-sealed at a temperature lower than the fusion temperature of the heat seal portion of the sheet by integrating the pull strength variation, (5) calculating the peel energy of the test piece heat-sealed at the temperature at or higher than the fusion temperature by integrating the pull strength variation up to rupture at a heat-sealed portion, and (6) setting the heat seal width at a peel leng

Abstract: This invention provides a method of designing a suitable heat seal width resistant to unseal more than conventional heat-sealing, which comprises;

Abstract: A simple method of setting heat-sealing conditions which involves the steps of, (1) using a pressing with heating apparatus having two faces which face each other, at least one face thereof being movable toward the other face to nip an object to be heat-sealed, at least one face being provided with a heating means, and at least a temperature of one face being measurable, (2) providing a surface cover material to a heating face which is the same material as a surface cover material of a real heat sealer to be used, (3) inserting a minute temperature sensor between heat-sealing surfaces of the object to be heat-sealed, (4) locating the object between the two faces, (5) heating the face provided with a heating means at a temperature exceeding the fusing point of the surface to be heat-sealed of the object, (6) moving the movable face toward the other face to nip the object, (7) measuring a time course of temperature at a part to be heat-sealed of the object, (8) setting a pressing period of the real heat