JP2009083101A - Method and apparatus for producing corrugated sheet, method for producing heating element, and heating element - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a production apparatus and method which easily folds a sheet member into pleats of an exact waveform without creasing the sheet member while the sheet member is conveyed stably, and the permeability, elongation, and fracture of the sheet member are prevented, and also to provide a heating element. <P>SOLUTION: In the method for corrugating the sheet member by using a relief-like member, wave attachment is carried out gradually from the middle side toward the out side of the sheet member. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a corrugated sheet manufacturing method and manufacturing apparatus, a heating element manufacturing method, and a heating element.

  As an apparatus for manufacturing a corrugated sheet obtained by bending a sheet member into a corrugated shape, for example, Patent Document 1 discloses a flat guide head provided with a plurality of grooves that run parallel or inclined to each other, and a plurality of guide heads. A flat plate-like holding device having a plurality of rod-like members loosely inserted along the groove, and the sheet member is passed between the guide head and the holding device so as to be corrugated. A large number of folds are to be formed.

  Further, in Patent Document 2, a receiving roll provided with a concave groove extending in the circumferential direction along the outer peripheral portion, and a circumference that is adjacently arranged with the receiving roll and the rotation axis in parallel and loosely inserted into the concave groove. A plurality of slit-side rolls provided with ridges extending in the direction along the outer peripheral surface, and sandwiching the sheet member in the gap between the concave grooves and the ridges and bending them into a corrugated shape, receiving-side rolls and slits An apparatus for producing a corrugated sheet by feeding out a sheet member by rotation of a side roll is described.

  Examples of these applications include absorbent articles such as sanitary napkins, diapers, and incontinence pads, and the absorbent articles generally include a front cover sheet, a back cover sheet, and an absorber contained therebetween. Become. The sheet material that constitutes these sheets or absorbent bodies is bent into a corrugated sheet to form a corrugated sheet, thereby maintaining the space and improving the liquid absorption, penetration and retention, improving the liquid distribution, and leakage characteristics. It is possible to improve the wear comfort and appearance.

  In the apparatus described in Patent Document 3, the guide head and the pressing device are fixed relative to the sheet member, and the sheet member is pulled out in the conveying direction and passes through the gap between the guide head and the pressing device. Therefore, a large load is applied to the sheet member due to frictional force at the time of passage, and the sheet member is stretched or broken, so that there is a problem that it is not possible to stably carry the work while bending the waveform. . Such a problem becomes prominent particularly when the wave height is formed large.

According to the apparatus described in Patent Document 4, a plurality of slit-side rolls provided with ridges along the outer peripheral surface are independently provided along the peripheral surface of the receiving-side roll. In other words, the sheet member is pressed against the receiving side roll, and the sheet member is lifted from the outer peripheral surface of the receiving side roll between the slit side rolls.
When one slit-side roll pushes the sheet member into the concave groove and pushes it into the receiving roll, the surrounding sheet member floats up around the periphery of the receiving roll, and when the next slit-side roll pushes the sheet member into the concave groove and pushes into the side roll There is a case where the sheet member is wrinkled and the operation of conveying the sheet member while bending it into a beautiful waveform cannot be stably performed. In particular, the wavy packaging material for a heating element that contains streaky exothermic composition parts at intervals is covered and sealed with the formable exothermic composition provided at intervals in streaks. The form seeks. If the streaky shape is poor, the wavy packaging material breaks down the moldable exothermic composition provided at intervals in the form of streaks, and the formable exotherm collapsed when sealing the periphery of the moldable exothermic composition A broken piece of the composition causes the seal to break, and a usable heating element cannot be produced.
It was necessary to create a corrugated shape accurately without changing the air permeability of the sheet member having air permeability and without generating wrinkles.

On the other hand, exothermic compositions composed of iron powder, water, water retention agents, oxidation aids, and the like, which are representative examples of exothermic agents that react with air and generate heat, simply generate heat when they come into contact with air without requiring ignition. Therefore, a heating element in which the heat generating composition is housed in a breathable bag is widely used.
Conventionally, a so-called disposable body warmer using a heat generating composition using iron powder or the like as a heat source has a flat shape, and has been manufactured by filling a heat-permeable composition into a breathable storage bag by a filling method. Disposable body warmers have poor flexibility, poor usability, and a flexible heating element has been desired.
Conventionally, there has been no flexible heating element in which exothermic composition parts are accommodated at intervals in a streak shape.

Japanese National Patent Publication No. 10-506333 JP-A-2002-144455 Japanese National Patent Publication No. 10-506333 JP-A-2002-144455

  The present invention allows the sheet member to be bent in an accurate corrugated pleat without causing the wrinkle of the sheet member while transporting the sheet member in a stable state to prevent the air permeability, extension and breakage of the sheet member. An object of the present invention is to provide a manufacturing apparatus, a manufacturing method, and a heating element.

As a result of intensive studies, the present inventor has solved the above problems and completed the present invention.
In other words, the corrugated sheet manufacturing method of the present invention is a method of forming a corrugated sheet member using corrugated members as described in claim 1, wherein the corrugated sheet is directed outward from the center side of the sheet member. And gradually corrugating.
Moreover, the manufacturing method of the heat generating body of this invention uses the said corrugated sheet of Claim 1 as a coating | covering material as described in Claim 2, and arrange | positions a heat-generating composition molded object on a base material in a strip shape. The exothermic composition molded body is covered with the covering material, and a peripheral edge of the exothermic composition molded body is sealed.
The corrugated sheet manufacturing apparatus according to the present invention is an apparatus for manufacturing a corrugated sheet formed by inserting a sheet member and bending it into a corrugated shape, wherein a plurality of groove portions are provided adjacent to each other. And a pushing member supported so as to be rotatable in the extending direction of the groove, and another groove facing the groove, and the pushing member is rotatable in the other groove. And a receiving side member configured to be accommodated at the center, and among the adjacent pressing members, the pressing member on the center side is disposed closer to the insertion side of the sheet member than the pressing member on the outside, and Each pushing member is arranged so as to be gradually shifted from the center side toward the outside toward the discharge side.
The corrugated sheet manufacturing apparatus according to claim 4 is the corrugated sheet manufacturing apparatus according to claim 3, wherein the pushing member is constituted by a rotating roll, and the rotating roll is extended in the groove portion. It arrange | positions adjacent to a direction, The number of the rotation rolls in the said outer groove part from the inside of the said groove part on the center side was gradually decreased toward the said outer side, It is characterized by the above-mentioned.
Moreover, the present invention described in claim 5 is characterized in that in the corrugated sheet manufacturing apparatus according to claim 4, the corrugated sheet manufacturing apparatus further comprises a joining means for joining a base sheet to the bottom surface of the corrugated sheet.

As a result of intensive studies, the present inventor has solved the above problems and completed the present invention.
In the method for producing a corrugated sheet according to the present invention, a sheet member that travels in a direction in which the concave portion extends is provided between a receiving side member having a plurality of concave portions extending in a predetermined direction and a pushing member loosely fitted in the concave portion. In a method of manufacturing a corrugated sheet by interposing and inserting the sheet member into the recess and bending the sheet member into a corrugated shape, at least a portion where the sheet member contacts the receiving side member and the pushing member is rotated. A roll having a function, and a push-in member incorporating a plurality of convex rolls into the frame, the sheet member is inserted into the recess from a central portion, and the recess of the sheet member as the sheet member travels It is preferable to gradually increase the number of penetrations.
The corrugated sheet manufacturing apparatus of the present invention is an apparatus for manufacturing a corrugated sheet formed by bending a sheet member into a corrugated shape, and includes a plurality of concave portions extending in the circumferential direction along the outer peripheral portion. It consists of a receiving side roll and a frame pushing roll that are separated from each other by a convex part, and the frame pushing roll extends in the circumferential direction so as to penetrate into the concave part of the receiving side roll, and the receiving side roll and the rotation axis are parallel to each other. And a plurality of rotatable convex rolls provided on the frame, and a convex portion of at least a convex portion of the convex roll of the frame pushing roll and a concave portion of the receiving roll. The end of the convex portion and the end of the concave portion that are in contact with the sheet member are rounded (arc-shaped), and at least at the end in the TD direction of the receiving side roll and the frame pushing roll To seat part Is inserted between the receiving side roll and the frame pushing roll, and moved while sandwiching the sheet member, to the insertion port of the sheet pushing member of the frame pushing roll. A convex roll located on the most upstream side is provided at a position penetrating into the concave portion located in the center of the outer periphery of the receiving roll, and the convex roll located on the downstream side is closer to the center of the peripheral surface. It is sequentially provided at a position where it is inserted into the concave portion positioned on the outer side, and a sheet member is sandwiched between the receiving roll and the frame pushing roll, and is bent into a concavo-convex shape, and the receiving roll and the It is preferable to feed the corrugated sheet by rotation of a convex roll for pushing the frame.
Further, in the corrugated sheet manufacturing apparatus, the receiving side member is a flat frame receiving side roll having a plurality of convex roll shafts arranged in a planar shape, and the pushing member is a plurality of arranged in a planar shape. This is a flat sheet frame intrusion roll having a convex roll axis, and is a corrugated sheet manufacturing apparatus that combines a flat frame receiving roll and a flat frame pressing roll, and the concave portion of the flat frame receiving roll is formed between the convex rolls. A concave portion, the concave portion is linearly provided in the feeding direction of the sheet member, a plurality of convex rolls of the flat plate frame pushing roll are arranged in the feeding direction of the sheet member, and the first convex roll shaft on the most upstream side The number of convex rolls on the convex roll axis is the smallest, and the number of convex rolls on the convex roll axis gradually increases toward the outer side as the first convex roll axis is located on the downstream side. Door is preferable.
In the corrugated sheet manufacturing apparatus, it is preferable that the frame pushing roll has a wrinkle prevention tool at least between any of the convex rolls and at least one part of the end.
Moreover, it is preferable that a corrugated sheet manufacturing apparatus is equipped with the joining means which joins a flat base material sheet along the uneven | corrugated bottom face of the said corrugated sheet formed by bending in the waveform.
In the heating element manufacturing method of the present invention, a sheet member that travels in the extending direction of the recess is interposed between the receiving member having a plurality of recesses extending in a predetermined direction and the pushing member loosely fitted in the recess. And using the corrugated sheet produced by bending the sheet member into the recess and bending the sheet member into a corrugated shape as a covering material, and covering the exothermic composition molded body provided in a strip shape on the base material, It is preferable to seal the peripheral edge of the exothermic composition molded body.
An apparatus for producing a heating element according to the present invention is an apparatus for producing a heating composition molded body, in which a heating composition is molded, and a plurality of heating composition molded bodies are laminated on a substrate at intervals. A corrugated sheet manufacturing apparatus in which a member is bent into a corrugated structure and a heating element manufacturing apparatus comprising a sealing device that seals the base material and the corrugated sheet, the corrugated sheet fed from the corrugated sheet manufacturing apparatus being endless A plurality of exothermic composition molded bodies that are conveyed on the belt are coated so that they can be accommodated in the convex portions of the corrugated sheet, and are incorporated so that they can be conveyed to the next step. The manufacturing apparatus is provided with a plurality of concave portions extending in the circumferential direction along the outer peripheral portion, and the concave portion includes a receiving side roll and a frame pushing roll separated from each other by the convex portion, and the frame pushing roll Is A corrugated sheet is provided along the outer circumference of the receiving roll with a gap between the highest rotation point of the receiving roll and the lowest rotating point in the rotation direction. The base material supported by the endless belt is in contact with the outer periphery of the receiving side roll with a space where it can come into contact with the sheet, and the frame push-in roll is inserted into the recess of the receiving side roll. And having a structure in which a plurality of rotatable convex rolls extending in the direction and having the receiving side roll and the rotation axis parallel to each other are attached to the frame, and the ends of the convex portions of the convex rolls of the frame pushing roll At least the end portion of the concave portion of the receiving portion and the receiving side roll, the convex portion and the concave portion penetrate, and the end portion of the convex portion contacting the sheet member and the end portion of the concave portion are provided in an R shape (substantially arc shape). Of side roll and frame push roll At least at the end portion in the TD direction, there is a narrow space between which the sheet member can pass in a plane, and the sheet member is inserted between the receiving side roll and the frame pushing roll while sandwiching the sheet member A convex roll that is moved and located on the most upstream side closest to the insertion port of the sheet pushing member of the frame pushing roll is provided at a position where the convex roll is inserted into the concave portion that is located in the center of the outer peripheral portion of the receiving roll. The convex roll positioned on the side is sequentially provided at a position where the convex roll is inserted into the concave section located outside the center of the peripheral surface, and the sheet member is sandwiched between the concave section of the receiving roll and the convex roll. The corrugated sheet can be fed out by rotating the receiving roll and the convex roll while being bent into a concavo-convex shape, while the endless belt is driven at the same speed as the outer peripheral speed of the receiving roll. The base material and the exothermic composition molded body can be transported for a certain period of time, and each exothermic composition molded body that has been transported is housed, sealed, and transported within each convex portion of the corrugated sheet. Is preferred.
The heating element of the present invention preferably uses at least one corrugated sheet manufactured by the corrugated sheet manufacturing method and corrugated sheet manufacturing apparatus.

1. According to the corrugated sheet manufacturing apparatus of the present invention, the sheet member is conveyed in a stable state, and even with a breathable sheet member, the sheet member can be easily corrugated without preventing expansion and breakage and without changing the breathability. The corrugated sheet-shaped covering material for a pleated heating element can be easily manufactured in which a small-area segmented heat generating portion is provided in a streak shape at intervals.
2. According to the present invention, the sheet member can be conveyed in a stable state, and the sheet member can be easily bent into a corrugated shape while preventing the sheet member from being stretched or broken. Further, according to the present invention, it is possible to simultaneously form a large number of waveforms on the sheet member while preventing the sheet member from being stretched or broken.
It should be noted that a certain region where the TD direction end of the apparatus of the present invention and the TD direction end of the receiving roll meet is a narrow gap, and / or the apparatus has at least one part between the convex rolls. By providing the prevention tool, the intervening sheet can be securely held during traveling, and the deformation of the uneven shape due to the return of the sheet member due to the elasticity of the sheet member between the convex rolls can be prevented. It is possible to easily manufacture a wave sheet-shaped covering material for a pleat-type heating element having a sectioned heating section.
Further, if the wrinkle prevention device is provided at least at one part between the wrinkle prevention device provided at the end of the frame of the device of the present invention in the TD direction and at least one of the convex rolls, a sharper uneven shape is obtained. It is possible to easily manufacture a heating element covering material having a streak-like segmented heat generating portion.
Further, if at least one of the end of the convex surface of the convex roll and the end of the convex portion of the receiving roll of the apparatus of the present invention is provided in a round shape (arc shape), even a breathable sheet member can be stretched. The sheet member can be transported in a stable state while preventing breakage and breakage, and the sheet member can be easily bent into a concavo-convex shape without changing the air permeability. Can be easily manufactured.
Moreover, since the apparatus of the present invention can form a pleated sheet at a short distance by arranging convex rolls in a constant pattern for a short distance in the MD direction, the pleated sheet manufacturing apparatus can be made compact. Can do.
3. By using the corrugated sheet manufacturing method of the present invention, it is possible to easily manufacture a pleated heating element having a sharp uneven segmented heating part.
4). Since the pleated heating element of the present invention can maintain flexibility at all times before use, during use, and after use, it fits well to the body and provides a sufficient thermal effect.

Hereinafter, the present invention will be described based on preferred embodiments with reference to the drawings.
The heating element of the present invention is a heating element manufactured by using a corrugated sheet and having a plurality of segmented heating parts “in stripes at intervals.

  The exothermic composition that can be used in the present invention is not limited as long as the exothermic composition molded body package can be produced by the exothermic composition molded body production method and / or production apparatus of the present invention. It is a moldable water-containing exothermic composition containing carbon components such as iron powder and activated carbon, a reaction accelerator such as sodium chloride, and water as essential components, and containing excess water having a mobile water value of 0.01 to 50.

In addition to the above components, the moldable water-containing exothermic composition of the present invention comprises a water retention agent such as wood flour, a water-absorbing polymer, a molding aid, a hydrogen generation inhibitor such as sodium sulfite, and a pH adjustment such as calcium hydroxide. Agents, aggregates, functional substances, nonions such as polyoxyethylene alkyl ethers, zwitterionic, anionic and cationic surfactants, hydrophobic polymer compounds such as polyethylene and polypropylene, organosilicon compounds such as dimethyl silicone oil, conductive material, the far-infrared emitting material such as a ceramic, negative ion generator such as tourmaline, heating aids such as FeCl _2, metals other than iron, silicon, aluminum, or the like, metal oxides other than iron oxide, such as manganese dioxide, hydrochloride , Acidic substances such as maleic acid and acetic acid, fibrous materials such as pulp, fertilizer components such as urea, humectants such as glycerin and D-sorbitol Further, it may contain at least one selected from an additional component consisting of a release agent or a mixture thereof.
In addition, the component of the exothermic composition used for a well-known disposable body warmer or a heat generating body can be used.

The blending ratio of the moldable excess water exothermic composition is not particularly limited, but preferably 1.0 to 50 parts by weight of carbon component and reaction accelerator 1 with respect to 100 parts by weight of iron powder. 0.0-50 parts by weight, water 1.0-60 parts by weight, water retention agent 0.01-10 parts by weight, water-absorbing polymer 0.01-20 parts by weight, pH regulator 0.01-5 parts by weight, hydrogen generation 0.01 to 12 parts by weight of inhibitor, 1.0 to 50 parts by weight of metal other than iron, 1.0 to 50 parts by weight of metal oxide other than iron oxide, 0.01 to 5 parts by weight of surfactant, hydrophobicity Polymer compounds, aggregates, fibrous materials, functional substances, organosilicon compounds, pyroelectric substances are each 0.01 to 10 parts by weight, molding aids and release agents are 0.001 to 6% by weight, respectively, moisturizing Agent, fertilizer component and exothermic auxiliary are 0.01 to 10 parts by weight, 0.01 to 1 part by weight of acidic substances, respectively A. In addition, you may make it mix | blend a magnetic body further and should just determine a mixing | blending ratio suitably as needed.
This blending ratio can also be applied to a reaction mixture and an exothermic mixture. The mobile water value of the reaction mixture is preferably less than 0.01.
Moreover, you may make it mix | blend a magnetic body further and should just determine a mixing | blending ratio suitably as needed.
It is preferable to select the blending ratio so that the easy water value is 0.01 to 20 as the exothermic composition.

Examples of the iron powder include, but are not limited to, cast iron iron powder, atomized iron powder, electrolytic iron powder, reduced iron powder, sponge iron powder, and iron alloy powder thereof. Furthermore, these iron powders may contain carbon or oxygen, or may contain other metals, such as iron containing 50% or more of iron. The type of metal contained as an alloy or the like is not particularly limited as long as the iron component acts as a component of the exothermic composition, but examples include metals such as aluminum, manganese, copper, and silicon, and semiconductors. The metal of the present invention includes a semiconductor.
In the iron powder of the present invention, the content of metals other than iron is usually 0.01 to 50% by weight, preferably 0.1 to 10% by weight, based on the entire iron powder.

Examples of iron powder having an oxygen-containing film on at least a part of the iron surface include: An active iron powder obtained by subjecting an essential component of an exothermic composition or an acidic substance or other necessary components to contact treatment with an oxidizing gas, partially oxidizing the iron component, and at least partially oxidizing the surface of the iron component. Active iron powder having a wustite content of 2 to 50% by weight as an X-ray peak intensity ratio of iron. Iron powder having an iron oxide film with a thickness of 3 nm or more on the surface D. An example is a mixture of active iron powder and iron powder other than active iron powder.

The active iron powder is such that at least a part of the surface of the iron powder is covered with an iron oxide film, one of which has a thickness of 3 nm or more, and at least a central region of the active iron powder and It is an active iron powder having a region of an iron component not containing oxygen in at least one region selected from a region below the iron oxide film.
The thickness of the iron oxide film which is an oxygen-containing film covering the surface of the iron powder is not limited as long as it is 3 nm or more using Auger electron spectroscopy, but is usually 3 nm or more, preferably 3 nm to 100 μm. More preferably 30 nm to 100 μm, still more preferably 30 nm to 50 μm, still more preferably 30 nm to 1 μm, still more preferably 30 nm to 500 nm, still more preferably 50 nm to 300 nm. By making the thickness of the iron-containing film of iron 3 nm or more, the iron-containing film of iron can exert the effect of promoting the oxidation reaction, and contact the oxidizing gas such as air to start the oxidation reaction immediately. Can do.
If the thickness of the iron oxygen-containing coating is 100 μm or more, the heat generation time may be shortened, but it can be used depending on the application.
The other is an active iron powder having wustite, and the amount of wustite is usually 2 to 50% by weight, preferably 5.01 to 50% by weight, as an X-ray intensity ratio with iron. Preferably it is 5.01 to 40 weight%, More preferably, it is 6 to 40 weight%, More preferably, it is 7 to 30 weight%, More preferably, it is 7 to 25 weight%. Even if it exceeds 50% by weight, the heat buildup is good, but the heat generation duration is shortened. If it is less than 2% by weight, the heat build-up property becomes dull.

The method for analyzing the thickness of the iron oxide film of the active iron powder is Auger electron spectroscopy, and the method for measuring the amount of wustite is X-ray analysis.
In the Auger electron spectroscopy, the ratio of the peak intensity (Io) of O (oxygen) to the peak intensity (Ii) of Fe (Io) when sputtering with Ar at a sputtering rate of 11 nm / min in terms of Fe in the depth direction (Io) / Ii) refers to a portion where 0.05 or more. Therefore, the thickness of the iron oxygen-containing film on the surface of the iron powder is a distance in terms of Fe from the surface of the iron powder to a depth where (Io / Ii) is 0.05. The measurement conditions are sputtering time: 15 minutes and sputtering speed: 11 nm / min (Fe conversion). As the sputtering time of the Auger electron spectroscopy elapses, Io decreases and Ii increases. By converting the sputtering time from the iron powder surface to a depth at which (Io / Ii) is 0.05, the thickness of the iron oxide film can be calculated.
The amount of wustite is an X-ray intensity ratio based on the following formula from the integrated intensity of the peak of the 110 plane of iron (αFe) and the integrated intensity of the peak of the 220 plane of FeO (wustite) using an X-ray analyzer. As a percentage.
Wustite amount (%) = 100 × (KFeO / KαFe)
Integral intensity of KFeO: FeO (wustite) 220 face peak KαFe: Integral intensity of 110 face peak of iron (αFe) Iron powder having an iron oxide film other than iron powder (carbon component, reaction accelerator) If the mixture is prepared using a mixture containing water, water, etc., the iron powder may be separated from the mixture after preparation with a magnet or the like and measured as a sample. In addition to the exothermic composition, when analyzing the exothermic composition or exothermic composition molded body in the exothermic body, in a nitrogen atmosphere, disperse the exothermic composition or exothermic composition molded body in ion-exchanged water substituted with nitrogen, A measurement sample is obtained by separating iron powder with a magnet and drying it under a nitrogen atmosphere.

  The aggregate is not particularly limited as long as it is useful as a filler and / or useful for making the exothermic composition porous. Fossil coral (coral fossil, weathered reef coral, etc.), bamboo charcoal, Bincho charcoal, silica-alumina powder, silica-magnesia powder, kaolin, crystalline cellulose, colloidal silica, pumice, silica gel, silica powder, mica powder, clay, talc, Examples include synthetic resin powders and pellets, foamed synthetic resins such as foamed polyester and polyurethane, algae, alumina, and fiber powder.

The molding aid is added to improve the strength of the exothermic composition molded body and maintain the shape by combination with moisture, and includes water-soluble polymers, hydrophilic polymers, and inorganic compounds.
That is, it acts between the composition material particles of the exothermic composition such as iron powder, and prevents collapse of the exothermic composition molded body during movement to the seal after molding.

Examples of molding aids include cellulose type, starch type (starch derivative), semi-synthetic type, synthetic type, syrup type, mannan type, seaweed, plant mucilage, microbial mucus, protein award, polysaccharide type, etc. As mentioned.
For example, stearates, polyacrylates such as sodium polyacrylate, gelatin, polyethylene oxide, polyvinyl alcohol, polyvinyl pyrrolidone, gum arabic, tragacanth, locust bean gum, guar gum, gum arabic, sodium alginate, etc. , Pectin, carboxyvinyl polymer, dextrin, pregelatinized starch, starch-based water-absorbing agent such as processing starch, xanthan gum, duran gum, pullulan, guard run, etc. Plant seed mucilage, carrageenan, seaweed extract such as agar, plant resin mucilage such as gum arabic, tant gum, karaya gum, polysaccharide thickener such as plant fruit mucilage such as pectin, arapinogalactan, carbox Cellulose derivative thickeners such as methylcellulose (CMC), sodium carboxymethylcellulose, ethyl acetate, and hydroxymethylcellulose, acrylic sulfonic acid polymer materials, poly-N-vinylacetamide, or water-soluble cellulose such as methylcellulose and hydroxypropylmethylcellulose Examples thereof include animal proteins such as gelatin albumin casein, plant proteins such as soybean protein and wheat protein, bentonite, kaolin, sodium silicate, aluminum silicate and the like. Moreover, the mixture of 2 or more types avoided from these etc. is mentioned as an example.
The water-soluble cellulose ether described in JP-A-2003-301200 is also useful in the present invention, and the description of this JP-A is also incorporated herein by reference in its entirety.
In addition, the components of the exothermic composition of the present invention include exothermic compositions such as thickeners and excipients that have been conventionally disclosed or commercially available, or are used in known disposable warmers and exothermic bodies. Those having the function of collecting can also be used.

  The mold release agent is not limited, but includes lubricating oils composed of mineral oil, synthetic oil, animal and vegetable oils, high viscosity lubricating oils such as natural wax and synthetic wax, silicone, stearic acid, stearates Etc. are mentioned as an example.

The functional substance may be any substance as long as it has some function such as medicinal effect and aroma. Perfumes, herbs, herbs, herbal medicines, transdermal drugs, pharmaceutically active substances, fragrances, lotions, emulsions, poultices, fungicides, antibacterial agents, bactericides, deodorants or deodorants, magnetic substances, etc. As an example.
Furthermore, specific examples of functional substances include acidic mucopolysaccharides, chamomiles, horse chestnuts, vitamin E, nicotinic acid derivatives, blood circulation promoters such as alkaloid compounds; horse chestnuts, flavone derivatives, anthocyanidins, Swelling improvers such as vitamin P, goldfish, silanol, terminaria, mayus; aminophylline, tea extract, caffeine, xanthene derivative, inosit, dextran sulfate derivative, horse chestnut, escin, anthocyanidin, organic iodine compound, hardwood leather, horsetail, Slimming agents such as mannenrou, ginseng, hyaluronidase; analgesics such as indomethacin, dl-camphor, ketoprofen, shoga extract, red pepper extract, methyl salicylate, glycol salicylate; Chromatography, rosemary, citron, Jenipa, peppermint, eucalyptus, rosewood, include perfumes orange etc., it can be used one or more kinds.

  The percutaneously absorbable drug is not particularly limited as long as it is percutaneously absorbable. For example, skin stimulants, analgesic anti-inflammatory agents such as salicylic acid and indomethacin, central nervous system agents (sleep sedatives, Antiepileptics, neuropsychiatric agents), diuretics, antihypertensives, lotus vasodilators, antitussives, antihistamines, arrhythmic agents, cardiotonic agents, corticosteroids, local anesthetics, and the like. These drugs are used alone or in combination of two or more as required.

The iron powder is not limited as long as it contains 50% or more of iron.
Cast iron iron powder, atomized iron powder, electrolytic iron powder, reduced iron powder, sponge iron powder, and iron alloy powder thereof can be used as examples. Furthermore, these iron powders may contain carbon or oxygen, or may contain other metals, such as iron containing 50% or more of iron. The type of metal contained as an alloy or the like is not particularly limited as long as the iron component acts as a component of the exothermic composition, but examples include metals such as aluminum, manganese, copper, and silicon, and semiconductors. The metal of the present invention includes a semiconductor.
In particular, those having a carbon component and / or iron oxide on the surface of the iron powder are preferable as the iron powder for performing an active exothermic heat reaction. In the iron powder of the present invention, the content of metals other than iron is usually 0.01 to 50% by weight, preferably 0.1 to 10% by weight, based on the entire iron powder.

The packaging material constituting the base material or coating material of the present invention is not limited as long as it functions as a packaging material for a heating element. The packaging material used for a well-known disposable body warmer or a heat generating body can be used.
For example, non-breathable material, breathable material, water-absorbing material, non-water-absorbing material, non-stretchable material, stretchable material, stretchable material, non-stretchable material, foamed material, non-foamed material, non-heat seal as packaging material Examples thereof include a heat-resistant material, a heat-sealable material, and the like, and can be appropriately used depending on a desired application in a desired form such as a film, a sheet, a nonwoven fabric, a woven fabric, and a laminate thereof.

As the air permeable film, for example, a porous film using, for example, polyethylene, polypropylene, polyfluorinated ethylene film or the like is suitably used, and the pore diameter is determined according to the required air permeability. The amount of ventilation is designed in relation to the heat generating agent to be used, depending on the required heat generation amount and temperature.
In addition, a non-breathable film such as a polyethylene film or a non-breathable film such as a polyethylene film laminated with a non-woven fabric laminated on a non-breathable film or a porous film. A laminated body is mentioned as an example.

The non-breathable film may be a film that does not substantially transmit oxygen, such as polyolefins such as polyethylene, polypropylene, and polyptadiene, polyvinyl chloride, polyvinylidene chloride, polyester, polyether, polysulfone, polyamide, and the like. An example of the packaging material is as follows.
A laminate in which a water-absorbing polymer-containing polyester nonwoven fabric is laminated on one side of a non-breathable polyethylene film or a laminate in which paper such as corrugated paper is laminated on one side of a non-breathable polyethylene film can also be used.

  The arrangement shape of the plurality of divided heat generating portions is not limited, but examples thereof include a lattice shape, a stripe shape, a wave shape, a lattice-stripe shape, and a random shape.

The heating portions of the present invention are preferably provided in a streak-like manner, and “providing a streak-like spacing” means that a plurality of segmented heating portions are provided in a streak-like manner (parallel lines). ). One streak is preferably composed of one section heat generating portion.
Moreover, as long as the following conditions are satisfied, one streak may be composed of two or more divided heat generating portions and one or more divided portions.
T is T ≧ 2S, and preferably T ≧ 2.5S.
P is P ≦ T, and preferably P ≦ 0.5T.
T: Length of one section heat generating portion S: Width of one section heat generating portion P: Length of section section Parallel stripes (vertical stripe, horizontal stripe, diagonal stripe, vertical wave stripe, horizontal wave stripe, diagonal wave stripe, etc. For example, a streak made up of segmented heat generating portions may be arranged in ().

In the case of a heating element having segmented heat generating portions provided in a striped manner in the present invention, a parallel hexahedron-shaped segmented heat generating portion in which the absolute value of the difference in bending resistance in two directions that are perpendicular to each other is maximized. A heating element provided with streaks spaced apart, a heating element provided with a pressure-sensitive adhesive layer, and a heating element provided with the adhesive layers spaced apart in a streak form are very Since it is flexible and rigid in one direction, it has the effect of relieving symptoms such as stiff shoulders, back pain, and muscle fatigue, and particularly relieving symptoms of menstrual pain. Furthermore, it can be wound in the width direction of the heating element with a size of almost the width dimension, is compact, and is convenient for storage. When a separator is provided, the separator can be wound by using a separator having low bending resistance.
When a heating element is provided along the body, the body has many secondary curved surfaces, and the shoulders, legs, abdomen, waist, arms, etc. are almost linear in one direction, and the other two directions are Made almost from a curved surface. Therefore, the heating element of the present invention, which can form a curved surface in one direction, and can form a curved surface in the other two directions, can form a two-dimensional curved surface. Ideal for symptom relief and treatment.

Although there is no restriction | limiting in the size of the said division | segmentation exothermic part or the said exothermic composition molded object, A preferable size is as follows.
1) In the case of a circular shape, a disc shape, and a disc-like shape The diameter is preferably about 1 mm to about 60 mm, more preferably 2 mm to 50 mm, still more preferably 10 mm to 40 mm, and further preferably 20 mm to 30 mm. It is.
The height is preferably 0.1 mm to 20 mm, more preferably 0.3 mm to 20 mm, still more preferably 0.5 mm to 20 mm, still more preferably 1 mm to 20 mm, more preferably 1. It is 5 mm-10 mm, More preferably, it is 3 mm-9 mm, More preferably, it is 4 mm-8 mm, More preferably, it is 5 mm-7 mm.
The volume is preferably from about 0.0045 cm ³ to about 20 cm ³ , more preferably from about 0.2 cm ³ to about 11 cm ³ .
2) When the shape is other than 1) (rectangular shape, rectangular-like shape, etc.) The width is preferably 0.5 mm to 60 mm, more preferably 0.5 mm to 50 mm, and preferably 0.5 mm to 50 mm. More preferably, it is 1 mm-50 mm, More preferably, it is 3 mm-50 mm, More preferably, it is 3 mm-30 mm, More preferably, it is 5 mm-20 mm, More preferably, it is 5 mm-15 mm, More preferably Is 5 mm to 10 mm.
Further, the height is preferably 0.1 mm to 30 mm, more preferably 0.1 mm to 20 mm, still more preferably 0.1 mm to 10 mm, still more preferably 0.3 mm to 10 mm, and further Preferably they are 0.5 mm-10 mm, More preferably, they are 1 mm-10 mm, More preferably, they are 2 mm-10 mm.
Further, the length is preferably 5 mm to 300 mm, more preferably 5 mm to 200 mm, more preferably 5 mm to 100 mm, still more preferably 20 mm to 150 mm, and further preferably 30 mm to 100 mm.
Further, the surface area is not limited as long as it has a function as a segmented heat generating portion, but is preferably about 50 cm ² or less, more preferably about 40 cm ² or less, still more preferably less than about 25 cm ² , still more preferably. Is less than 20 cm ² .
The volume of the section heat generating part or the volume of the exothermic composition molded body is preferably 0.015 cm ^{3 to} 500 cm ³ , preferably 0.04 cm ^{3 to} 500 cm ³ , more preferably 0.04 cm ^{3 to 30} cm ^3. , and still more preferably from 0.1cm ³ ~30cm ^3, more preferably from ^{1cm 3 ~30cm} 3, still more preferably from 1.25 cm ³ to 20 cm ^3, more preferably 1.25cm ³ ~10cm ³ , and still more preferably from ^{3cm 3 ~10cm} 3.

  The width of the dividing portion is not limited as long as the dividing heat generating portion can be provided with an interval, but is usually 0.1 mm to 50 mm, preferably 0.3 mm to 50 mm, more preferably 0.00 mm. It is 3 mm-50 mm, More preferably, it is 0.3 mm-40 mm, More preferably, it is 0.5 mm-30 mm, More preferably, it is 1 mm-20 mm, More preferably, it is 3 mm-10 mm.

The covering material is a covering material having a corrugated shape, and between the exothermic composition composition and the covering material having the convex part before lamination, in their height and width,
The relationship between the height of the convex portion of the corrugated coating material and the height of the exothermic composition molded body is as follows:
(Height of convex part of wave-shaped coating material) / (Height of exothermic composition molded body) =
Preferably it is 0.01-1.5, More preferably, it is 0.01-1.0, More preferably, it is 0.01-0.5, More preferably, it is 0.01-0.3 The relationship between the width of the convex portion of the wave-shaped coating material and the width of the exothermic composition molded body is
(Width of exothermic composition molded body) / (Width of convex portion of wave-shaped coating material) =
Preferably it is 0.6-0.99, More preferably, it is 0.7-0.99, More preferably, it is 0.8-0.99, More preferably, it is 0.9-0.99 It is a covering material.
The base material is 1) a substantially flat base material 2) a base having a concave portion having a shape substantially larger than the bottom surface shape of the exothermic composition molded body and having a height less than the height of the exothermic composition molded body. Material 3) One type selected from base materials having a substantially larger shape than the bottom shape of the exothermic composition molded body and having a recess having a height equal to or higher than the height of the exothermic composition molded body.
Here, in the case of a base material having a concave portion less than the height of the exothermic composition molded body or a covering material having a convex portion, the following relationship is preferably satisfied.
The relationship between the height of the concave portion of the substrate and the height of the exothermic composition molded body is as follows:
(Concavity of base material) / (Height of exothermic composition molded body) =
Preferably it is 0.01-0.99, More preferably, it is 0.01-0.99, More preferably, it is 0.01-0.5, More preferably, it is 0.01-0.3 ,
The relationship between the height of the convex portion of the corrugated coating material and the height of the exothermic composition molded body is as follows:
(Height of convex part of wave-shaped coating material) / (Height of exothermic composition molded body) =
Preferably it is 0.01 to 1.5, more preferably 0.01 to 1.0,
More preferably, it is 0.01-0.5, More preferably, it is 0.01-0.3,
The relationship between the width of the concave portion of the substrate or the convex portion of the covering material and the width of the exothermic composition molded body is as follows:
(Width of exothermic composition molded body) / (width of concave portion of substrate or convex portion of corrugated covering material) =
Preferably it is 0.6 to 0.99, more preferably 0.7 to 0.99,
More preferably, it is 0.8-0.99, More preferably, it is 0.9-0.99.
In the present invention, the substantially planar shape means a storage pocket, storage compartment, storage area, cover pocket, cover compartment, cover area, corrugated shape that is provided in advance to store or cover the exothermic composition molded body. A flat surface that does not have a concave or convex portion for storage such as a cover. Accordingly, there may be irregularities that are not intended to house or cover the exothermic composition molded body. Since unevenness that is not intended for storage of the intentionally exothermic composition molded body or unevenness that is not intended for covering is not a storage area, even if such unevenness is present in the base material or coating material, a substantially planar base material or A typical planar covering material is used.

The exothermic composition molded body of the present invention and the exothermic composition used in the manufacturing method of the exothermic body can be formed as a exothermic composition molded body, and the peripheral portion of the exothermic composition molded body can be sealed by the base material and the coating material. There is no limit. As an example, the exothermic composition may be mentioned. In more detail, in the present invention,
(1) Exothermic composition (movable water value of 0.01 to 20) which does not function as a barrier as an air blocking layer and generates heat when it comes into contact with air (2) In the exothermic composition The exothermic composition that functions as a barrier as an air barrier layer and exothermic composition after excluding a certain amount of moisture generates heat when in contact with air (over a mobile water value of 20 to 50) Two exothermic compositions can be used.
In particular, it has moldability capable of producing a pleated heating element, and immediately after the production of the exothermic composition, it is left in air at 20 ° C. in an air environment, and the moldable water content generates heat of 1 ° C. or more within 5 minutes. The exothermic water value of the exothermic composition is preferably from 0.01 to less than 14, more preferably from 0.01 to 13.5, still more preferably from 0.01 to 13, Preferably it is 0.01-12, More preferably, it is 1-12, More preferably, it is 3-12, More preferably, it is 5-11.

First, a corrugated sheet manufacturing method and manufacturing apparatus will be described.
First, the corrugated sheet manufacturing apparatus of the present invention will be described in detail.

The corrugated sheet manufacturing apparatus according to the present invention is configured as follows.
As shown in FIG. 2, a plurality of groove portions 3 are provided adjacent to each other along the sheet insertion direction in the base 2 constituted by a column having a substantially triangular cross-sectional shape, and cross each groove portion 3. Thus, the rotation shaft 8 is provided side by side in the sheet insertion direction.
The first convex roll shaft 8 on the most upstream side (sheet insertion side) is provided with a single convex roll 7 (pressing member) in the center, and the second convex roll shaft 8 has The convex roll 7 is added to both sides, the convex roll 7 is further added to both sides of the third convex roll shaft 8, the convex roll is added to both sides of the fourth convex roll axis, The central part and the both sides thereof, the both sides thereof, or both sides thereof are arranged. In the illustrated example, the number of convex rolls 7 is gradually increased from the sheet insertion side, such as 1, 3, 5, and 7.

As shown in FIG. 4, the receiving-side roll 21 is configured by providing a plurality of concave portions (other groove portions) 22 extending in the circumferential direction of the cylindrical roll adjacent to the axial direction. . In addition, the recessed part 22 is arrange | positioned so that the groove part 3 provided in the said base 2 may be opposed.
The rotating shaft 9 of the receiving roll 21 is arranged in parallel with the respective shafts 8 provided on the base 2, and a plurality of protruding rolls 7 extending in the circumferential direction are inserted into the recessed portions 22. The corrugated sheet manufacturing apparatus 1 is formed by being fitted into the recess 22 provided along the outer peripheral surface of the corrugated sheet 21.
A corrugated sheet is continuously formed by inserting a sheet member 29 into the gap between the concave portion 22 and the convex portion roll 7 of the manufacturing apparatus 1.

The sheet member may be conveyed by another roll drive.
In addition, the number of the convex rolls 7 provided on each convex roll shaft 8 is not limited to the illustrated one, and can be appropriately increased or decreased according to the number of irregularities to be formed on the corrugated sheet.
The pushing member in the present invention is not limited to a driving method, a freely rotating type, or a rotating method. Examples of the shape include a curved surface and a planar shape.

  Thereby, for example, as shown in FIG. 6, a corrugated sheet 40 is obtained by bending a sheet member made of a laminate of a porous film and a nonwoven fabric or a nonwoven fabric into a corrugated shape. If this corrugated sheet 40 is used as a covering material, a heating element having striped segmented heating portions shown in FIG. 15 can be obtained. In addition, regarding the corrugated sheet of FIG. 6, for example, a flat base sheet 41 made of a non-woven fabric is bonded, and thereby the corrugated shape in which a plurality of convex portions are erected side by side is firmly held.

  The receiving-side roll 21 is a rotating drum body having a diameter of about 100 to 1000 mm, for example, and as shown in FIG. 4, the recesses 22 are arranged on the outer peripheral surface at equal intervals in the direction of the axis 9.

  The convex roll 7 is smaller than the receiving roll 21, for example, has a diameter of about 2 to 100 mm.

  The distance between the adjacent convex roll 7 and the convex roll 7 between the rotating shafts 8 is not limited, but is preferably 2.5 to 200 mm, more preferably 2.5 to 100 mm, and still more preferably 2 It is 0.5-50 mm, More preferably, it is 2.5-30 mm, More preferably, it is 2.5-30 mm, More preferably, it is 5-30 mm.

Here, the width of the recess 22 of the receiving roll 21 is not limited, but is preferably 1 to 200 mm, more preferably 1 to 150 mm, still more preferably 1 to 100 mm, and further preferably 3 to 50 mm. More preferably, it is 3-20 mm, More preferably, it is 3-15 mm.
The depth of the recess 22 is not limited, but is preferably 0.5 to 50 mm, more preferably 1 to 30 mm, still more preferably 1 to 20 mm, still more preferably 5 to 20 mm, and still more preferably. 5-10 mm.

Further, the width of the convex portion 7 is not limited, but is preferably 1 to 200 mm, more preferably 1 to 150 mm, still more preferably 1 to 100 mm, still more preferably 3 to 50 mm, and still more preferably. Is 3 to 20 mm, more preferably 3 to 15 mm.
The height of the convex portion 7 is not limited, but is preferably 0.5 to 80 mm, more preferably 1 to 60 mm, still more preferably 1 to 50 mm, still more preferably 5 to 50 mm, and still more preferably. Is 5-40 mm.

  The distance between the outer peripheral surface of the receiving roll 21 and the pushing member 7 is not limited as long as the sheet member 29 can pass through, but is preferably 0.5 to 30 mm, more preferably 1 to 20 mm, and still more preferably 1 to 1. It is 10 mm, More preferably, it is 1-5 mm, More preferably, it is 3-5 mm.

  Further, the gap between the outer periphery of the convex roll 7 in the MD direction and the outer periphery of the adjacent convex roll 7 is not limited unless wrinkles that are substantially unusable occur in the sheet member 29, but preferably 300 mm or less, More preferably, it is 0.01-300 mm, More preferably, it is 0.01-200 mm, More preferably, it is 0.01-100 m, More preferably, it is 0.01-50 mm, More preferably, it is 0.01 It is -30m, More preferably, it is 0.01-20m, More preferably, it is 0.01-10mm, More preferably, it is 0.01-5mm.

3A to 3C show an example in which a plurality of convex rolls 7 are fixed to the rotating shaft 8 of FIG. FIG. 2B shows the drive source 12 provided at the end of the shaft 8.
As shown in FIG. 3 and FIG. 4, it is preferable to provide the corner | angular part (edge part) of the convex roll 7 and the recessed part 22 of a receiving side roll in round shape (substantially circular arc shape). That is, the corrugated sheet member can be manufactured without forming the edge portion and changing the air permeability of the air permeable sheet member by forming the edge portion in a substantially arc shape (R shape).
The radius r shape (substantially arc shape) is not limited as long as the corrugated sheet member does not cause a change that causes practical problems, but the curvature radius is preferably 0.1 to 20.0 mm, more preferably 0. 0.1 to 10.0 mm, more preferably 0.1 to 5.0 mm, still more preferably 0.3 to 5.0 mm, still more preferably 0.3 to 3.0 mm, and still more preferably. Is 0.5 to 2.0 mm.

  Moreover, it is preferable that at least one part of the roll or the apparatus is a low friction property in the part in contact with the sheet member 29 such as the concave part 22 and the convex roll 7. For example, a roll or an apparatus made of a synthetic resin having high slidability or a metal having excellent smoothness can be given as an example.

  Moreover, it is preferable that the recessed part 22 and the convex roll 7 form a complement, and the partition part between the recessed parts 22 and the partition part between the convex rolls 7 form a complement. Furthermore, it is impossible to use practically by providing a wrinkle prevention surface at the partition between the convex rolls 7 and at the end in the TD direction, and preventing deformation of the sheet member 29 at the partition between the recesses 22 and at the end in the TD direction. Accurate corrugated sheets can be manufactured without generating wrinkles.

  Further, as shown in FIG. 2, in the present invention, the push-in member is constituted by a rotating roll (convex roll 7), and the convex roll is arranged adjacent to the center side on the insertion side of the sheet member most frequently. However, the number of the convex rolls 7 is reduced toward both sides.

  Moreover, although not shown in figure, the heat seal roll is provided in the downstream of the corrugated sheet manufacturing apparatus 1 as a joining means which joins a base material sheet.

  As described above, according to the corrugated sheet manufacturing apparatus 1 of the present embodiment, the sheet member can be easily corrugated while the sheet member is conveyed in a stable state to prevent a change in air permeability of the sheet member, expansion, and breakage. Can be bent to form a corrugated sheet.

A corrugated sheet manufacturing method will be described step by step with reference to FIGS.
FIG. 5A shows the relationship between the receiving roll 21 and the push roll 7.
In FIG. 5 (b), when the sheet member 29 is conveyed to the position where the first convex roll shaft 8 is disposed, the central portion thereof is the central concave portion 22 by the convex roll 7 of the first convex roll shaft 8. And is sandwiched in the gap between the concave portion 22 and the convex portion roll 7 to be bent into a corrugated shape to form a central corrugated portion. The sheet member 29 having the corrugated portion formed at the center is positioned at the downstream position of the second convex roll shaft 8 with little friction during passage due to the rotation of the receiving roll 21 and the first convex roll shaft. It is sent out towards.

In FIG. 5C, when the sheet member 29 is conveyed to the arrangement position of the second convex roll shaft 8, the central concave 22 and the three convex rolls 7 of the second convex roll shaft 8 are used. When the sheet member 29 is pushed into the concave portions 22 on both sides and is sandwiched between these gaps, the corrugated portions on both sides are formed, and the sheet member 29 has the receiving-side roll 21 and the first convex roll shaft 8 or convex. By the rotation of the part roll 7, it is sent out toward the arrangement position of the downstream third convex part roll shaft with almost no friction during passage.
In FIG. 5D, at the position where the third convex roll shaft 8 is disposed, the convex rolls 7 of the third convex roll shaft 8 form further corrugated portions on both sides, and FIG. As shown in FIG. 4, the corrugated sheet is formed by forming the corrugated portion further outside by the seven convex rolls 7 of the fourth convex roll shaft 8 at the arrangement position of the fourth convex roll shaft 8. 40 is obtained.
Furthermore, the corrugated sheet 40 supported by the base sheet 41 shown in FIG. 6 may be manufactured by bonding the base sheet 41 to the corrugated sheet 40 obtained by a heat seal roll.

  As described above, according to the present embodiment, there is almost no frictional force when the sheet member bent into a waveform is sent out, and therefore, the corrugated sheet is formed while the sheet member is conveyed in a stable state. Can do. In addition, according to the present embodiment, since the plurality of convex roll shafts 8 are used to sequentially form the concave and convex corrugated portions one by one from the center to the outside, a plurality of adjacent concave and convex portions are simultaneously formed. As is the case, the seat member is not forced to play in the transverse direction, so that the seat member is not subjected to excessive tension, and therefore, the air permeability change, expansion and breakage of the sheet member are effectively avoided. be able to.

Moreover, in this Embodiment, since the distance between each convex part roll axis | shaft 8 is shortened, the sheet | seat member bent in the waveform leaves | separates the convex part roll 7 of the convex part roll axis | shaft 8, and passes between these. In doing so, the sheet member 29 can be held on the receiving roll side 21,
For example, a plurality of suction holes are formed in the bottom surface of the concave portion 22 of the receiving side roll 21 and an air suction means is provided inside the receiving side roll 21 so that the sheet member 29 bent into a corrugated shape is formed on the convex portion roll shaft 8. When the sheet member 29 passes between the two, the sheet member 29 is attracted to the receiving roll side 21 and the bent waveform shape can be held more firmly. Moreover, if each convex roll shaft 8 is driven and controlled so that the rotational speed of the outer peripheral surface thereof is the same as the rotational speed of the outer peripheral part of the receiving roll 21, the sheet member 29 can be conveyed in a more stable state. Is possible.

  Furthermore, the corrugated sheet manufacturing apparatus 1 of the present embodiment can be a compact apparatus with a small installation area.

17 (a) and 17 (b) show a corrugated sheet manufacturing apparatus 1 according to another embodiment of the present invention, which uses a flat base 2 and a receiving member 21. FIG. .
18 (a) and 18 (b) are exploded views of FIG.

The present invention is not limited to the above-described embodiments, and various modifications can be made. For example, the number of receiving-side rolls and pushing members can be designed as appropriate, and a plurality of receiving-side rolls can be provided adjacent to the periphery of the pushing member having only the outer frame.
Moreover, the number of the recessed part and convex part roll formed in a receiving side roll, a receiving side convex part roll axis | shaft, or a convex part roll axis | shaft can also be designed arbitrarily. Furthermore, the corrugated sheet manufacturing apparatus of the present invention is not limited to the case where the covering material or the base material of the heating element is formed into a corrugated shape, and the case where the cover sheet of the absorbent article is formed into a corrugated shape, or other sheet members Can also be used when forming a waveform. Furthermore, for joining the corrugated sheet and the base sheet, other joining means such as joining with an adhesive or ultrasonic joining can be selected in addition to heat sealing. The corrugated sheet produced according to the present invention is useful as a member of an absorbent article such as a front cover sheet, a back cover sheet, an absorbent sheet constituting an absorber, and is also applied as a cleaning sheet.

  Further, according to the present embodiment, the receiving side member is a pushing member in which the rotating body and the pushing member are incorporated in the aligned group frame of the small rotating rolls, so that the installation area is small and compact.

A method and apparatus for manufacturing a pleated heating element using the corrugated sheet manufacturing apparatus will be described.
FIG. 14 shows a pleated exothermic composition molded body manufacturing apparatus (hereinafter simply referred to as a heating element manufacturing apparatus) according to the present invention.
The manufacturing apparatus includes a heat generating composition molded body manufacturing apparatus 44, a corrugated sheet-shaped coating material manufacturing apparatus 56, a heat seal roll 26 that is a heat seal apparatus, and a cut roll 51.

The exothermic composition molded body is arranged in stripes on the base material 30 by the exothermic composition molded body manufacturing apparatus 44, and the corrugated sheet manufacturing apparatus 1 is configured to bend the covering material 29 into a corrugated shape and At the same time, the exothermic composition molded body is accommodated in each convex portion of the corrugated sheet-like covering material, and its peripheral portion is sealed.
The corrugated sheet manufacturing apparatus 1 includes a plurality of concave portions 22 extending in the circumferential direction along the outer peripheral portion, and the concave portions 22 approach the convex wall and are separated from each other by the receiving roll 21 and the pushing member. 7, and the push-in member 7 has a gap that allows the corrugated sheet-like covering material 29 to be formed between the highest rotation point of the receiving-side roll 21 and the lowest rotation point in the rotation direction, along the outer periphery of the receiving-side roll 21. The base material 30 supported by the endless belt 48 is in contact with the outer periphery of the receiving-side roll 21 with an interval at which the base material 30 and the corrugated sheet-like coating 29 can contact each other in the vicinity of the lowest rotation point. It is provided as follows.
A structure in which a plurality of rotatable convex rolls 7 extending in a circumferential direction penetrating into the concave portion 22 of the receiving-side roll 21 and provided with the receiving-side roll 21 and the rotation axis parallel to each other are attached to the base 2. The convex portion of the convex roll 7 penetrates into the concave groove on the outer peripheral surface of 40% or less of the outer periphery of the receiving roll 21.

FIG. 8 is a side view of the corrugated sheet presser 42.
FIG. 9 is an explanatory cross-sectional view for explaining the relationship in which the rotatable pressing roller 7 of the corrugated sheet pressing tool 42 deeply presses and conveys the corrugated sheet covering material 29 covering the base material 30 on which the exothermic composition molded body 33 is laminated. It is.
FIG. 10 is an explanatory cross-sectional view for explaining the relationship in which the rotatable pressing roller 7 of the corrugated sheet pressing tool 42 presses and conveys the corrugated sheet-shaped covering material 29 covering the base material 30 on which the exothermic composition molded body 33 is laminated. It is.
FIGS. 11A to 11D are examples of corrugated sheet-like covering materials with varying corrugation depths.
12 (a) to 12 (d), the corrugated sheet-shaped covering material 29 having a shallow corrugation covers the base material 30 on which the exothermic composition molded body 33 is laminated, and the peripheral portion of the exothermic composition molded body 33 is heat sealed. FIGS. 12A to 12D are schematic cross-sectional views illustrating the corrugated sheet-like covering material 29 with a shallow depth, up to the middle of the height of the exothermic composition excluding the end in the TD direction. This is an example in which the corrugated sheet-shaped covering material 29 covers.
When the height of the exothermic composition molded body 33 formed by molding using a mold having a desired shape and laminated on the base material 30 is high, the depth of the corrugated sheet-shaped covering material 29 is set to When the depth is increased, wrinkles may occur at the end of the heating element in the MD direction when the covering material 29 and the base material 30 are sealed to form a heating element. . In order to prevent this, it is used for the shallow corrugated sheet-like covering material 29 (FIG. 12A), and after covering the base material 30 (FIG. 12B) on which the exothermic composition molded body 33 is laminated ( FIG. 12 (c)), by extending and sealing the covering material 29 and / or the base material 30 formed of thermoplastic resin by heat sealing, a heating element can be obtained without causing harmful flaws. it can.
FIG. 13 is a perspective cross-sectional view in which the exothermic composition molded body 33 is provided in a pleat mold, and a portion corresponding to the pleat portion at the peripheral edge of the exothermic composition molded body is heat-sealed.

Next, a method for manufacturing a pleated heating element will be described.
As shown in FIG. 14, the heating element manufacturing apparatus 43 forms the heating composition 32 using the heating composition molded body manufacturing apparatus 44, and the heating composition molding 33 is formed into a stripe shape. Laminated on the base material at intervals, and conveyed to the corrugated sheet-like coating material coating step.
On the other hand, a covering material 29, which is a laminate of a porous film and a nonwoven fabric, is supplied to the corrugated sheet manufacturing apparatus 1 via a covering material supply apparatus (not shown) and is driven and controlled at a predetermined rotational speed. It is wound around a roll 21 and conveyed and moved in the feed-out direction T along the outer peripheral portion thereof. When the covering material 29 is conveyed to the arrangement position of the first convex roll shaft, as shown in FIG. 5 (b), the central portion thereof is the central concave portion by the convex roll 7 of the first convex roll shaft. And is sandwiched in the gap between the concave portion 22 and the convex portion roll 7 to be bent into a corrugated shape to form a central corrugated portion. The coating material with the corrugated portion formed in the center is directed toward the downstream second convex roll shaft arrangement position with little friction during passage due to the rotation of the receiving roll 21 and the first convex roll shaft. Sent out.
When the covering material 29 is conveyed to the arrangement position of the second convex roll shaft, as shown in FIG. 5C, the central concave portion and the central convex portion 7 are formed by the three convex rolls 7 of the second convex roll shaft. The covering material 29 is pushed into the concave portions on both sides thereof and is sandwiched between these gaps, whereby the corrugated portions on both sides are formed, and the covering material is the receiving roll 21 and the first convex roll shaft or the convex roll 7. Is rotated toward the arrangement position of the downstream third convex roll shaft with almost no friction during passage. At the arrangement position of the third convex roll shaft, as shown in FIG. 5 (d), the five convex rolls 7 of the third convex roll shaft further form corrugated portions on both sides, At the arrangement position of the four convex roll shafts, as shown in FIG. 5 (e), the seven convex rolls 7 of the fourth convex roll shaft further form the corrugated portion on the outside thereof, The corrugated sheet-shaped covering material 29 is obtained, and the obtained corrugated sheet-shaped covering material 29 is conveyed to the corrugated sheet-shaped covering material coating step, covering the base material 30 on which the exothermic composition molded body is laminated, and the exothermic composition The peripheral part of the product molded body 33 and the peripheral part of the pleated heating element 33 are heat-sealed with a heat seal roll and cut with a cut roll to obtain a pleated heating element 33 having a desired sealing part.

Next, the pleated heating element of the present invention will be described.
FIG. 15A is a plan view of a pleated heating element 34 according to an embodiment of the present invention. The pleated heating element 34 does not have the heating composition molded body 33, and is divided into five pieces with a separation part 57 as a seal part as an interval. The divided heat generating parts 52 are provided at intervals. FIG. 15B is a sectional view taken along the line ZZ.
FIG. 15C shows a separator 55 provided on the substrate 30 side of FIG.
FIG. 15D shows a separator provided via a breathable pressure-sensitive adhesive layer 54 provided in a net shape on the breathable surface side (coating material 29 side) of FIG.

  FIG. 16A is a view in which a ventilation adjusting material 36 is provided on the air permeable surface side (the coating material 29 side) of FIG. Specifically, it includes a sorting part 57 and a sorting heat generating part 52, a ventilation adjusting material 36 is provided on the upper surface of the sorting heating part 52 via a ventilation adhesive material layer 54, and a space as a ventilation path below the ventilation adjusting material 36. 37 is provided. FIG. 16B is a sectional view taken along the line Y-Y.

The easy water value is a value indicating the amount of surplus water that can move out of the exothermic composition in the water present in the exothermic composition.
The mobile water value is measured as follows.
No. with eight lines written at 45 ° intervals radially from the center point at room temperature and normal pressure. 2 (JIS P3801 type 2) filter paper is placed on a stainless steel plate, and a template of 150 mm length x 100 mm width waiting for a hollow cylindrical hole with an inner diameter of 20 mm and a height of 8 mm is placed at the center of the filter paper. Place the sample near the hollow cylindrical hole, move the push plate along the mold plate, put the sample into the hollow cylindrical hole while pushing the sample, and scrape the sample along the upper surface of the mold plate (mold push molding) ). Next, a non-water-absorbing 70 μm polyethylene film is placed so as to cover the hole, and a stainless steel flat plate having a thickness of 5 mm × length of 150 mm × width of 150 mm is placed thereon so that no exothermic reaction occurs. Hold for 5 minutes.
Thereafter, the filter paper is taken out, and the trace of water or aqueous solution soaking is read in millimeters as the distance from the circumference that is the edge of the hole of the hollow cylinder to the tip of the soaking, along the radial line. Similarly, the distance is read from each line, and a total of 8 values are obtained. Each of the eight values read (a, b, c, d, e, f, g, h) is taken as a measured moisture value. The arithmetic average of the eight measured moisture values is taken as the moisture value (mm) of the sample.
On the other hand, the moisture content for measuring the true moisture value is the blended moisture content of the exothermic composition corresponding to the weight of the exothermic composition having an inner diameter of 20 mm × height of 8 mm, and only water corresponding to the moisture content Measured in the same manner, and calculated in the same manner as the true water value (mm).
The value obtained by dividing the moisture value by the true moisture value and multiplying by 100 is the easy water value. That is,
Easy water value = [moisture value (mm) / true water value (mm)] × 100
The same sample is measured five times, the five easy water values are averaged, and the average value is taken as the easy water value of the sample. In the above measurement, 8 lines are written at intervals of 45 degrees radially from the centroid. Each line of the filter paper 31 of 2 (JIS P3801 type 2) may be graduated.

  When the surplus water in the exothermic composition reaches an appropriate amount, the hydrophilic groups in the composition components are hydrated by dipolar interactions or hydrogen bonds, and also have high structural properties around the hydrophobic groups. Is presumed to exist. As a result, it is estimated that sandy sand is formed, and moldability of the exothermic composition occurs. This is connected water which is a connected substance in some sense.

Here, the exothermic composition molded body is formed by a molding method, which is a moldable heat generation to a desired shape by a die-through molding method using a punching die or a casting molding method using a casting die. This is a method for producing a heating element by molding a composition, laminating the molded body on a substantially planar base material having no storage pocket, covering with another base material, and sealing. .
The mold-through molding method uses a punching die for convenience, and forms a punching-shaped exothermic composition molded body on a long base material and covers it with a long covering material. Use a rotary sealer that can seal the surrounding part and the peripheral part of the base material and coating material (heat seal, pressure seal, thermocompression seal, etc.), and the peripheral part of the exothermic composition molded body through the sealer As a forming machine, examples of the forming machine include a slat conveyor type using a slat as a cutting die and a hollow drum type using a hollow drum.
The casting molding method is a molding method in which a heat-generating composition molded body is laminated on a long base material by filling into a casting mold having a recess and transferring to a base material. In the case of the continuous type, a molding machine for laminating the exothermic composition molded body on a long base material and covering it with a long covering material by filling the gate part with a drum-shaped rotating body and transferring it to the base material , Using a rotary sealer that can seal the target section and the periphery of the base material and the covering material (heat seal, pressure seal, thermocompression seal, etc.), and the exothermic composition molded body through the seal device The continuous formation method etc. which heat seal the required location of the edge part and the division part, and enclose it.
In addition, a magnet may be used for producing a heating element using the exothermic composition of the present invention by using the above method and other methods. When a magnet is used, the exothermic composition can be easily housed in the bag or mold, and can be easily removed from the shape of the molded body, making it easier to mold the exothermic molded article and to produce the heating element. .
In particular, it is preferable to manufacture an integrated heating element that is directly manufactured from a moldable exothermic composition, a base material, and a coating material by a molding method.

  The pleated sheet of the present invention is used in addition to a flexible pleated heating element using a heat generating composition using iron powder or the like as a heat source, for example, sanitary napkins, diapers, incontinence pads, etc. An absorbent article is mentioned, and this absorbent article generally consists of a front cover sheet, a back cover sheet, and an absorber contained therebetween. The sheet material that constitutes these sheets or absorbent bodies is bent into a corrugated sheet to form a corrugated sheet, thereby maintaining the space and improving the liquid absorption, penetration and retention, improving the liquid distribution, and leakage characteristics. It is possible to improve the wear comfort and appearance.

  EXAMPLES Hereinafter, although this invention is demonstrated further in detail based on an Example etc., this invention is not limited by these.

Example 1
As exothermic composition, reduced iron powder (particle size 300 μm or less) 100 parts by weight, activated carbon (particle size 300 μm or less) 7.0 parts by weight, wood powder (particle size 300 μm or less) 5.0 parts by weight, water-absorbing polymer (particle size 300 μm or less) An exothermic composition having a mobile water value of 10 in which 0.8 part by weight, 0.2 part by weight of slaked lime, 0.7 part by weight of sodium sulfite and 11% saline were mixed was used.
The heat generating composition was formed through a polyethylene film provided with an acrylic pressure-sensitive adhesive layer having a thickness of 30 μm with a separator, using a punching die having five punching holes having a width of 5 mm and a length of 80 mm at intervals of 5 mm. The exothermic composition molded object which comprises five division | segmentation exothermic parts was provided on the base material.
Next, a breathable coating material obtained by laminating a non-woven fabric made of nylon having a basis weight of 40 g / m ² on a polyethylene porous film is covered with a corrugated coating material so as to cover the exothermic composition molded body. The area covering and substrate were heat sealed.
In addition, the division part which is a seal part of the peripheral part of each exothermic composition molded body was heat-sealed with a seal width of 3 mm, and the part which becomes the outer peripheral part of the heat generator was heat-sealed with a seal width of 8 mm.
A pleated heating element having a length of 98 mm and a width of 91 mm was obtained.
Incidentally, breathable breathable dressing with moisture permeability of Risshi method was 400g ^/ m 2 ^/ 24hr. The bending resistance was 20 mm in the long side direction (direction perpendicular to the stripe direction) of the heat generating portion, and was 80 mm or more in the short side direction (stripe direction). The bending resistance ratio was 4 or more in the two directions where the bending resistance was almost perpendicular. As described above, when the bending resistance in one direction is very high and the bending resistance in a direction substantially perpendicular to the one direction is very low, the handling property and the feeling of use are very excellent. Moreover, since this heat generating body can be wound, it becomes compact and is convenient for storage. In the case of a heating element with a separator, it can be wound by using a separator having low bending resistance.
The heating element was sealed and stored in a non-breathable storage bag (outer bag) and left at room temperature for 24 hours. After 24 hours, it was removed from the outer bag and subjected to an exothermic test. In 3 minutes, it felt warm and the warmth continued for 7 hours. At the same time, the curved surface fit, winding property and usability were evaluated, but all were excellent.

It is a schematic side view which shows an example of the corrugated sheet manufacturing apparatus of this invention. It is a schematic perspective view which shows an example of the frame pushing roll of this invention. (A)-(c) It is a schematic front view which shows another example of the pushing roll of this invention. It is a schematic sectional drawing which shows another example of the receiving side roll of this invention. (A)-(e) It is schematic explanatory sectional drawing which shows an example in which a corrugated sheet is manufactured in steps from the pushing roll in FIG. 1, a receiving side roll, and a sheet | seat member. It is a perspective view which shows an example of the corrugated sheet | seat manufactured. It is a schematic side view which shows an example of the waveform maintenance apparatus of the corrugated sheet manufacturing apparatus of this invention and the manufactured corrugated sheet. It is a schematic side view which shows the waveform maintenance apparatus of the waveform sheet | seat of FIG. It is a schematic explanatory sectional drawing which shows an example of the relationship between the corrugated sheet | seat in the waveform maintaining apparatus of this invention, a heat-generating composition molded object, and a base material. It is a schematic explanatory sectional drawing which shows another example of the relationship between the corrugated sheet | seat, the heat-generating composition molded object, and a base material in the waveform maintenance apparatus of this invention. (A)-(d) It is sectional drawing which shows another example of the corrugated sheet | seat manufactured. (A)-(d) Schematic explanation showing an example of step-by-step explanation of the process of producing a heat-generating composition molded body package (pleated heat-generating body) from the corrugated sheet of the present invention, a heat-generating composition molded body, and a substrate. It is sectional drawing. It is a schematic perspective view which shows an example of the state with which the corrugated sheet of this invention was covered by the base material with which the heat-generating composition molded object was laminated | stacked. It is a schematic side view which shows an example of the manufacturing apparatus of the exothermic composition molded object package (pleated heating element) using the corrugated sheet manufacturing apparatus of this invention. (A) It is a schematic plan view which shows an example of the exothermic composition molded object package (pleated heating element) of this invention. (B) is sectional drawing of the same ZZ. (C) And (d) is sectional drawing which shows the example of another heat generating body. (A) It is a schematic plan view which shows another example of the exothermic composition molded object package (pleated heating element) of this invention. (B) is sectional drawing of the same YY. (A) It is a schematic perspective view which shows another example of the corrugated sheet manufacturing apparatus of this invention. (B) is sectional drawing of the same XX. (A) and (b) are the schematic plan views which show the relationship between the frame pushing roll of FIG. 17, and a frame receiving side roll.

Explanation of symbols

1 corrugated sheet manufacturing equipment 2 base 3 groove 7 convex roll (pushing member)
8 rotating shaft 9 rotating shaft 10 rotating portion 12 drive source 21 receiving side roll (receiving side member)
22 recesses (other grooves)
25 seal roll 26 heat seal roll 27 adhesion part 28 non-attachment part 29 covering material (sheet member)
30 base material 33 exothermic composition molded body 34 exothermic composition molded body package (pleated heating element)
35 Sealing part 36 Ventilation regulating material 37 Space 42 Waveform shape maintaining device 43 Exothermic composition molded body manufacturing apparatus (heating element manufacturing apparatus)
44 exothermic composition molded body manufacturing apparatus 45 exothermic composition supply apparatus 47 roll 48 endless belt 49 slack prevention tool 50 support plate 51 cut roll 52 section heating section 53 adhesive layer 54 breathable adhesive layer 55 separator 57 section section

Claims (5)

  A method for forming a corrugated sheet, wherein the corrugated sheet is formed into a corrugated shape using a concavo-convex member, wherein the corrugated sheet is gradually corrugated from the center side toward the outer side.   The corrugated sheet according to claim 1 is used as a covering material, a heat-generating composition molded body is disposed on a base material in a stripe shape, the heat-generating composition molded body is covered with the covering material, and the heat-generating composition is formed. A method for producing a heating element, comprising sealing a peripheral portion of a molded body.   An apparatus for manufacturing a corrugated sheet that is bent into a corrugated shape by inserting a sheet member, and is supported so as to be rotatable in the extending direction of the groove portion, and a base provided with a plurality of adjacent groove portions. A pressing member, and another groove portion facing the groove portion, the receiving member configured to be housed in a rotatable state in the other groove portion, and the adjacent pressing member Among the members, the pushing member on the center side is arranged on the insertion side of the sheet member relative to the pushing member on the outside, and the pushing members are gradually shifted from the center side toward the outside toward the discharge side. An apparatus for producing a corrugated sheet.   The pushing member is constituted by a rotating roll, and the rotating roll is disposed in the groove portion adjacent to the extending direction of the groove portion, and the number of rotating rolls in the groove portion outside from the groove portion on the center side. The corrugated sheet manufacturing apparatus according to claim 3, wherein the corrugated sheet is gradually reduced toward the outside.   The corrugated sheet manufacturing apparatus according to claim 4, further comprising a joining unit that joins a base sheet to a bottom surface of the corrugated sheet.

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