Abstract: [Problems to be Solved] To coat homopolyethylene terephthalate, which is inexpensive and easily available, on a paper base material directly, not via an adhesive layer, by extrusion coating, thereby providing a paper laminate having heat sealability and having a homopolyethylene terephthalate coating of a uniform film thickness formed thereon. [Means to Solve the Problems] A method for producing a paper laminate having a coating comprising homopolyethylene terephthalate formed on at least one surface of a paper base material by extrusion coating is characterized in that an air gap L, expressed as a distance from a lip opening of a T-die to a paper base material B, is 25 cm or less.

Abstract: The present invention relates to a laminate comprising at least three layers, paper/polyethylene/polyethylene terephthalate, wherein the polyethylene terephthalate is directly coated on the polyethylene surface, with no adhesive layer or the like being interposed, and the polyethylene terephthalate layer has heat sealability; and a method for producing a laminate having polyethylene coated on at least one surface of a paper substrate, the method involving extrusion laminating polyethylene terephthalate onto a surface of the polyethylene, wherein an air gap expressed as the distance from a lip opening of a die to the polyethylene surface is 25 cm or less.

Abstract: The present invention relates to an alcohol concentration method which comprises sealing in an alcohol aqueous solution by a laminate formed by extrusion lamination of polyethylene terephthalate onto at least one surface of an air permeable film-shaped substrate; and storing the alcohol aqueous solution in the laminate for a predetermined period of time, whereby the alcohol in the alcohol aqueous solution can be concentrated easily and conveniently.

Abstract: The present invention relates to an alcohol concentration method which comprises sealing in an alcohol aqueous solution by a laminate formed by extrusion lamination of polyethylene terephthalate onto at least one surface of an air permeable film-shaped substrate; and storing the alcohol aqueous solution in the laminate for a predetermined period of time, whereby the alcohol in the alcohol aqueous solution can be concentrated easily and conveniently.

Abstract: The present invention relates to a laminate comprising at least three layers, paper/polyethylene/polyethylene terephthalate, wherein the polyethylene terephthalate is directly coated on the polyethylene surface, with no adhesive layer or the like being interposed, and the polyethylene terephthalate layer has heat sealability; and a method for producing a laminate having polyethylene coated on at least one surface of a paper substrate, the method involving extrusion laminating polyethylene terephthalate onto a surface of the polyethylene, wherein an air gap expressed as the distance from a lip opening of a die to the polyethylene surface is 25 cm or less.

Abstract: [Problems to be Solved] To coat homopolyethylene terephthalate, which is inexpensive and easily available, on a paper base material directly, not via an adhesive layer, by extrusion coating, thereby providing a paper laminate having heat sealability and having a homopolyethylene terephthalate coating of a uniform film thickness formed thereon. [Means to Solve the Problems] A method for producing a paper laminate having a coating comprising homopolyethylene terephthalate formed on at least one surface of a paper base material by extrusion coating is characterized in that an air gap L, expressed as a distance from a lip opening of a T-die to a paper base material B, is 25 cm or less.

Abstract: A packaging material is provided having a paper layer and a first coating layer laminated thereon, the first coating layer includes a first material and a second material, wherein the first material is a natural rubber or a derivative thereof, and the second material is a material selected from natural resins, waxes and derivatives thereof having permeability into paper. In addition, a packaging material is provided further having a second coating layer laminated having oil resistance, which consists of a biodegradable material.

Abstract: This disclosure relates to a container having a heating function which requires no complicated electric circuit and is free of incorrect operation, and to a heat conversion apparatus and a compact ignition apparatus for the container. The ignition apparatus comprises a piezoelectric element, a pressure-exerting apparatus for applying pressure to the piezoelectric element, a sensing device for sensing whether the container contains a desired material to be heated, a heat conversion apparatus for converting electric energy generated by the piezoelectric element into thermal energy to generate heat at high temperature, and an escaping discharge or spark gap device for discharging the electricity generated by the piezoelectric element at a place well away from the exothermic system when the sensing device does not sense that the container is filled with the desired material to be heated.

Abstract: An ignition mechanism for a heater which includes a metal exothermic container in which are mounted an exothermic part, a firing part and an igniter. The igniter is a type which may be actuated by pushing or pulling a string. The mechanism comprises a tube mounted on the container, the tube having one end positioned adjacent the igniter. A string is connected to the igniter and extends into the tube, the string being extendable to the other end, whereby the string may be manually pulled or pushed and thereby operate the igniter. A float may be attached to the string, and a water-soluble glue may be provided to initially hold the string in place before use.

Abstract: A self-heating container comprising a container with a heater fixed therein. The heater includes a pyrogen, a firing agent in contact with and easier to fire than the pyrogen, and an igniter including a rotatably supported striker wheel and a flint mounted for compressive engagement with the wheel. The wheel is rotatably engageable from outside the container.

Abstract: A-self heating container comprising a container with a heater fixed therein. The heater includes a pryogen, a firing agent in contact with and easier to fire than the pyrogen, and an igniter including a rotatably supported striker wheel and a flint mounted for compressive engagement with the wheel. The wheel is rotatably engageable from outside the container.

Abstract: An ignition system comprising a metal plate having a pyrogen on one side thereof, a turning shaft journalled by the plate, and a sparking wheel secured to the shaft. A flint is supported by the plate and pressed against the wheel. An opening is formed in the plate adjacent the wheel, and a screen is formed on the plate adjacent the opening. The screen deflects sparks through the opening to the pyrogen, and the screen is preferably angled to efficiently deflect the sparks. The igniter is mounted in a self-heating container for heating food or a liquid.

Abstract: A self-heating container comprising a heater contained in a container. The heater includes a pyrogen of high energy density having a large heating value, and a firing agent contacting the pyrogen and easier to fire than the pyrogen. Each of the pyrogen and the firing agents is a mixture of one or more kinds of metal oxide powder and one or more kinds of powder of elementary substances or alloys of metal and semimetal. The heater is supported on a wall of the container through a heat insulator to reduce the heat loss. The insulator has a bore formed through it and extending between the firing agent and the outside of the container. An igniter can be inserted into the bore to ignite the firing agent.

Abstract: An automatic iris adjustment system comprises a camera lens including an iris driving means for controlling the iris value; an image pickup element for converting the amount of light incident to the camera lens into an electrical signal; means for comparing the iris adjustment signal voltage V.sub.I from the image pickup element with the reference voltage V.sub.O to evaluate an error voltage V.sub.E (i.e., V.sub.E =V.sub.I -V.sub.O); means for calculating a varying component .DELTA.IRIS of iris control value as a predetermined function of the error voltage V.sub.E ; means for calculating an iris control value IRIS.sub.n basing on the calculated varying component .DELTA.IRIS of iris control value; and means for controlling the iris driving means in response to the calculated iris control value IRIS.sub.n.