JPS6219307B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a method for manufacturing a metal folding plate.

Conventionally, metal folding plates with heat insulating properties are manufactured by laminating heat insulating material on a metal plate and then bending the plate.As the insulating material, glass fiber, asbestos,
Noncombustible insulation materials mainly made of gypsum and polyethylene foam are used. However, since solvent-based adhesives are used to laminate the above-mentioned non-flammable insulation materials to metal plates, there is a risk of fire and hygiene problems, and since polyethylene foam is flammable, folded metal plates are not flammable. However, it was unsuitable for use in buildings. Furthermore, the above-mentioned heat insulating material has low mechanical strength and is cut at the bending part when being bent.
There was a drawback that the valley part was pressed by the bent parts on both sides and bulged, causing peeling.

In view of the above-mentioned drawbacks, the present invention provides a non-combustible material in which a heat insulating material is bonded to a metal plate without using an organic solvent-based adhesive, and without being cut at a bend or bulging or peeling at a trough. The purpose of this work was to provide a method for manufacturing a durable and lightweight metal folding plate.
A matte layer consisting of 40 to 5% by weight of organic fibers and a heat-fusible layer mainly made of heat-fusible fibers are laminated, and a large number of fibers forcibly arranged in the thickness direction are dispersed. The method of manufacturing a metal folded plate is characterized in that the heat-sealing layer of the heat-insulating sheet is heat-sealed to a metal plate and then bent.

The glass fibers used in the present invention include:
Any glass fiber can be used, but it is preferable that it is bulky, strong, and easy to arrange.Long fibers made from alkali-free glass (E glass) and made by direct melt method, marble melt method, etc. The thickness is preferably 5 to 16μ, more preferably 8 to 12μ, and the length is 30μ.
Preferably it is ~150 mm.

As the organic fiber used in the present invention, any organic fiber can be used, such as cotton, linen,
Examples include natural fibers such as silk, recycled fibers such as rayon, semi-synthetic fibers such as acetate, and synthetic fibers such as polyethylene, polypropylene, vinylon, polyvinyl chloride, polyvinylidene chloride, polyacrylonitrile, polyurethane, and polyamide.

The organic fibers are preferably bulky and easy to arrange, and have a diameter of preferably 1 to 10 deniers, more preferably 1.5 to 5 deniers,
Preferably, its length is between 30 and 150 mm.

The heat-fusible fibers used in the present invention include, for example, ethylene-vinyl acetate copolymer, polyethylene, modified polyethylene, modified polypropylene, copolyamide, copolyester,
Examples include fibers made from hot-melt resins such as copolymerized polyacrylic and modified polyvinyl alcohol. Composite fibers such as fibers in which hot-melt resin is laminated around the organic fibers, fibers in which organic fibers are dispersed in a sea-island pattern in hot-melt resin, and fibers in which organic fibers and heat-fusible fibers are laminated are also used. Can be used. The heat-fusible fibers are preferably easily arranged, have a diameter of 1 to 10 deniers, more preferably 1.5 to 5 deniers, and preferably have a length of 30 to 150 mm.

The pine layer in the present invention is formed by mixing the above-mentioned glass fibers and organic fibers into a sheet shape, but if the amount of organic fibers increases, it becomes flammable, and if the amount of organic fibers decreases, the strength decreases. It is formed by mixing 60 to 95% by weight of organic fibers and 40 to 5% by weight of organic fibers, preferably glass fibers.
70-90% by weight and organic fibers 30-10% by weight. The weight of the layer is preferably 250 to 500 g/m ² .

Any known method may be used to manufacture the mat layer, for example, glass fibers and organic fibers are cut into predetermined lengths, mixed, defibrated, and then collected by a fiber concentrator to form a sheet. The method will be adopted.

The heat-fusible fibers are preferably added in order to partially bond the glass fibers and organic fibers in the mat layer to improve the mechanical strength of the mat layer. If a large amount of the heat-fusible fiber is added, the mat layer becomes flammable, so it is preferably added in an amount of 5 to 40 parts by weight, more preferably 15 to 30 parts by weight, per 100 parts by weight of glass fiber and organic fiber. At the same time, the total amount of organic fibers and heat-fusible fibers is 40% of the total amount of glass fibers, organic fibers, and heat-fusible fibers.
It is preferable that it is less than % by weight.

Since the heat-sealing layer in the present invention is a layer that is heat-sealed to a metal plate, it is a layer mainly composed of heat-sealable fibers, and glass fibers, organic fibers, etc. are added in an amount less than 50% by weight. Good too. Further, the heat-fusible layer may be a non-woven fabric or a woven fabric of the above-mentioned fibers, but it is preferably formed into a layer of 10 to 60 g/m ² .

In the present invention, the mat layer and the heat-sealing layer are laminated, and a large number of fibers forcibly arranged in the thickness direction are dispersed to form a heat insulating sheet. It is preferable that both layers are laminated and then arranged from the heat-fusible layer side so that the fibers and organic fibers are partially bonded by the heat-fusible fibers.

Any conventionally known method may be employed as the above-mentioned arrangement method, such as needle punch treatment, high pressure water jet treatment, etc. It is preferable for the needle punching process to process 15 to 25 points per cm ² using felt needles, and in this case, it is preferable that the tips of the felt needles penetrate the heat insulating sheet and protrude by 5 to 10 mm. preferable. Also, high pressure water treatment is
Place the above heat insulating sheet on a wire mesh, etc., and make sure the diameter is
It is preferable to spray water at intervals of 3 to 5 mm from a 0.02 to 0.5 mm nozzle at a water pressure of 10 to 100 Kg/cm ² and a flow rate of 100 to 150 ml/min.

In the present invention, the heat insulating sheet is then heat-sealed to a metal plate such as a galvanized iron plate or a colored iron plate, and then bent to produce a metal folded plate.

Any known method may be used for the above thermal bonding, such as a method of pressing a heat bonding layer of a heat insulating sheet onto a heated metal plate, or a method of pressing a heat bonding layer of a heat insulating sheet onto a metal plate while pressing a metal plate. Examples include a method of heating from the side or (and) the mat layer side of the heat insulating sheet. In addition, after arranging the heat insulating sheets and before heat-sealing them to the metal plate, the heat-sealing sheets may be heated once to heat-seal the arrayed portions with heat-sealable fibers. Further, the above-mentioned folding process may be performed by any known method, for example, by a known folding plate manufacturing machine.

The structure of the present invention is as described above, and the pine layer is bulky and has excellent heat insulation properties because organic fibers are mixed between highly brittle glass fibers. In addition, the mat layer is laminated with a heat-sealing layer mainly made of heat-sealable fibers, and after a large number of fibers are forcibly arranged in the thickness direction, the matte layer is made of metal. Since the glass fibers and organic fibers of the pine layer are partially bonded at the arrangement part because they are heat-sealed to the board, the heat insulating sheet has high tensile strength and bending strength, making it difficult for the layers to separate. Therefore, in the metal folding plate manufactured according to the present invention, the heat insulating sheet will not be cut at the folded portion, nor will bulge or peel off at the valley portion, and the pine layer will not contain glass fibers of 60 to 95 mm.
% by weight, so it is non-flammable according to Ministry of Construction Notification No. 1828.

Next, the present invention will be explained with reference to examples.

Example Long glass fiber (E glass, diameter 9μ, fiber length 50
~80mm), 20 parts by weight of vinyl chloride fiber (diameter 3 denier, fiber length 50~80mm), and polyester fused fiber (manufactured by Unitika, product name type)
4000, diameter 3 denier, fiber length 50 to 80 mm) were mixed together and a mat of 370 g/m ² was produced using a web making machine. In addition, 70 parts by weight of polyester composite fiber (manufactured by Unitika, trade name S-10, diameter 3 denier, fiber length 50-80 mm) and polyester heat-fusible fiber (manufactured by Unitika, trade name Type)
4000, diameter 3 denier, fiber length 50 to 80 mm) were mixed together to produce a heat-sealable sheet of 30 g/m ² using a card machine.

The heat-sealing sheet was laminated on the above mat, and after needle punching from the heat-sealing sheet side with a No. 19 felt needle under the conditions of a needle penetration length of 9 mm and a needle density of 20 points/cm ² , the heat-sealing sheet was kept at 130°C. Supply it to a dripping hot air dryer and heat it for 10 minutes to obtain a thickness of 5 mm and an apparent density of 0.08.
A heat insulating sheet of g/cm ² was obtained. The resulting insulation sheet had a tensile strength of 2.9Kg/cm ² and an interlayer peel strength of 1.1Kg/cm 2 .
It was warm in ^cm2 . The obtained heat insulating sheet was laminated on a 0.8 mm thick colored galvanized iron plate heated to 180 to 200°C so that the heat-adhesive sheet was in contact with the heat-adhesive sheet, and was pressed with a roll to heat-fuse it, and then a folded plate with 20 rolls was formed. When the sheet was bent into a triangular shape using a manufacturing machine, a metal folded plate was obtained without the heat insulating sheet being cut at the bends, bulging at the valleys, or peeling off. The obtained folded plate was subjected to a nonflammability test according to the Test Method Notification No. 1828 of the Ministry of Construction, and was found to be nonflammable.

Claims (1)

[Claims] 1. A matte layer consisting of 60 to 95% by weight of glass fibers and 40 to 5% by weight of organic fibers and a heat-fusible layer mainly composed of heat-fusible fibers are laminated and are forced in the thickness direction. 1. A method for manufacturing a metal folding plate, which comprises heat-sealing the heat-sealing layer of the heat-sealing sheet in which a large number of fibers arranged in a uniform manner are dispersed to a metal plate, and then bending the sheet. 2. The manufacturing method according to claim 1, wherein the glass fiber is a long fiber. 3. The manufacturing method according to claim 1 or 2, wherein the arrangement is performed after laminating the mat layer and the heat-sealing layer. 4. The manufacturing method according to claim 1, 2, or 3, wherein the arrangement is performed by needle punching.