JP2006118073A - Manufacturing method of fluororesin gloves. - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of manufacturing a glove having a thin wall and excellent operability such as manual work excellent in solvent resistance and chemical resistance by a simple process.
SOLUTION: A hand-shaped mold is inserted between two fluororesin films, and in a state where two fluororesin films are overlapped, the overlapping portion of the films is heat-sealed to form a hand shape. Forming the welded film joint, cutting the film joint into a hand shape, and removing the hand-shaped paper mold from the resulting hand-shaped cutting sheet, resulting in excellent solvent resistance and chemical resistance Gloves that are thin and have good operability such as manual work can be manufactured in a simple process.
[Selection] Figure 1

Description

  The present invention relates to a method for producing a glove using a fluororesin film excellent in chemical resistance and solvent resistance.

  Conventionally, petroleum (gasoline, benzine, kerosene, etc.), aromatic (benzene, toluene, xylene, etc.), ester (ethyl acetate, butyl acetate, etc.), ketone (acetone, methyl ethyl ketone, etc.) and halogenated hydrocarbons In the field of handling solvents such as (fluorinated and chlorinated aliphatic hydrocarbons, aromatic hydrocarbons, etc.), solvent-resistant gloves and water-soluble acids (sulfuric acid, hydrochloric acid, nitric acid, chromic acid, etc.) ) And alkali (sodium hydroxide, potassium hydroxide, calcium hydroxide, liquid ammonia, etc.) and the like, chemical resistant gloves are used respectively.

Conventionally, as gloves used for these, gloves having a solvent or chemical resistant resin film such as fluororesin, urethane resin or acrylic resin on the surface of the glove body made of cloth, rubber or synthetic resin (patented) Documents 1 to 5) and gloves made from a laminate in which a film is laminated on one side of a fiber cloth (Patent Document 6) are known. Recently, hexafluoropropylene is formed on the surface of an elastomer substrate such as butyl rubber. A glove obtained by dip-coating an aqueous dispersion containing a small amount of a fluoroplastic resin such as polytetrafluoroethylene on a fluorinated elastomer such as a copolymer of vinylidene and fluorovinylidene can improve the solvent resistance. It has been proposed that the thickness of the elastomer layer can be reduced (Patent Document 7).

Japanese Patent Laid-Open No. 54-40264 Japanese Utility Model Publication No. 1-1039214 Japanese Utility Model Publication No. 4-37214 Japanese Utility Model Publication No. 6-4014 Japanese Utility Model Publication No. 9-132804 Japanese Utility Model Publication No. 1-83016 Japanese translation of PCT publication No. 2002-522661

However, the surface of the glove body made of the above-mentioned cloth, rubber or synthetic resin requires a process of coating with a solvent-resistant or chemical-resistant resin such as fluororesin, urethane resin, acrylic resin, etc. In the case of a glove made of a laminate of laminated layers, a process of adhering a film to one side of a fiber cloth with an adhesive is necessary, and there is a problem that the manufacturing process of the glove is complicated. When performing fine manual work, there is a problem that the gloves are thick and the operability is poor.
Therefore, the present invention has been made to solve the above-described problems of the prior art, and is a simple process, thin and excellent in solvent resistance and chemical resistance, and has excellent operability such as manual work. An object of the present invention is to provide a method for manufacturing a comfortable glove.

  The first gist of the present invention is that a hand-shaped paper mold is inserted between two fluororesin films, and the two fluororesin films are overlapped, and the overlapping portion of the films is heat-sealed. Forming the film joint welded in a hand shape, then cutting the film joint into a hand shape, and extracting the hand-shaped paper mold from the resulting hand-shaped cutting sheet. The second gist of the present invention is that a hand-shaped paper mold is inserted between two fluororesin films, and the two fluororesin films are overlapped. The film is welded in a hand shape by heat-sealing the overlapping part of the fluororesin film by pressing from both sides of the forward traveling part of the pair of endless belts that are sandwiched from above and below in the state. A joint is formed to move the endless belt Taken out of the running portion, then, the film joint was cut in hand shape, the method of manufacturing the fluororesin glove, characterized in that extracting the paper mold hand shape from the cut sheet of the obtained hand shape consists in.

  In the present invention, a hand-shaped mold is inserted between two fluororesin films, and in a state where the two fluororesin films are overlapped, the overlapping portions of the films are heat-sealed to form a hand shape. Forming the welded film joint, cutting the film joint into a hand shape, and removing the hand-shaped paper mold from the resulting hand-shaped cutting sheet, resulting in excellent solvent resistance and chemical resistance Gloves that are thin and have good operability such as manual work can be manufactured in a simple process.

  The first gist of the present invention is that a hand-shaped mold is inserted between two fluororesin films, and the two fluororesin films are superposed, and the overlapping portion of the films is thermally fused. Forming a film joint portion welded in a hand shape, then cutting the film joint portion into a hand shape, and extracting a hand shape mold from the resulting hand shape cutting sheet. It is a manufacturing method of resin gloves.

  That is, as shown in FIG. 1, first, two fluororesin films 12a and 12b between the hot plates 11a and 11b and a hand-shaped mold sheet 13 as shown in FIG. 2 between the films 12a and 12b, For example, a paper sheet is inserted, and the two fluororesin films 12a and 12b are overlapped and pressed by hot plates 11a and 11b heated to a predetermined temperature, and the overlapping portions of the films are heat-sealed. As shown in FIG. 3, the film in the region where the hand-shaped paper sheet 13 is inserted and the paper sheet are not welded, and the region of the overlapping portion 14 between the films on the outside is welded. A joint 14 is formed. Next, the hand-shaped outer peripheral portion 15 of the film joining portion 14 is cut, and the hand-shaped paper mold 13 is extracted from the hand-shaped cutting sheet 16 obtained as shown in FIG. it can.

  Examples of the fluororesin include polytetrafluoroethylene (PTFE), tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (PFA), tetrafluoroethylene-hexafluoropropylene copolymer (FEP), and ethylene-tetrafluoroethylene copolymer. A polymer (ETFE), an ethylene-chlorotrifluoroethylene copolymer (ECTFE), a polyfluorovinylidene (PVDF), or the like can be used.

The thickness of the fluororesin film is 100 μm or less, preferably 10 μm to 100 μm, and more preferably 20 to 50 μm. If the thickness of the film is thicker than 100 μm, the film is hard when used as a glove, and the operability thereof is lowered.

As the hand-shaped mold sheet, a paper sheet, for example, a sheet formed by cutting various paper materials such as Japanese paper, high-quality paper, coated paper, glassine paper, etc. into a hand-shaped mold material is used.

  Examples of the means for heat-sealing include a hot roll method, a thermocompression-bonding roll method, a hot press method, and an iron method, but a hot press method that presses the overlapping portion of two films simultaneously with heating is suitable. . That is, during heating and pressurization, the overlapping portion is heated in a temperature range where each film melts and does not lead to thermal decomposition, preferably within a temperature range lower than the melting point of the film by 20 ° C. than the melting point of the film. After that, when the pressure is applied from above and below, for example, within a pressure range of 0.1 to 5 MPa, and the overlapping portion of the film is heat-sealed by the hot press method, the region of the hand-shaped paper mold is the film and paper. Without being welded, the overlapping portion of the films on the outside is welded to form the film joint. Although there is no restriction | limiting in particular as a pressurization means, It is suitable to utilize gas pressures, such as air adjusted to the fixed pressure.

  Next, the second gist of the present invention is that a pair of paper sheets is inserted between two fluororesin films, and the two fluororesin films are overlapped with each other and fed from above and below. The endless belt is heated and pressed from both sides of the forward traveling portion to heat-seal the overlapping portion of the fluororesin film, thereby forming the film joined portion welded in a hand shape to form the endless belt. A fluororesin glove manufacturing method characterized by taking out from the forward running section, then cutting the film joint into a hand shape, and extracting the hand-shaped paper mold from the resulting hand-shaped cutting sheet. Exist.

That is, a method for continuously manufacturing a fluororesin glove by inserting a hand-shaped paper mold between two fluororesin films will be described with reference to FIG.
In the figure, an endless belt-like body 2A is attached to the machine base 1 via a plurality of rolls 3A, and the endless belt-like body 2A has a forward traveling portion 21A that travels horizontally in the direction of the arrow D and an arrow D direction. A reverse traveling portion 22A that travels in the opposite direction is formed. An endless strip 2B is attached to the mounting frame 4 of the machine base 1 via a plurality of rolls 3B, and the endless strip 2B travels horizontally in the direction of the arrow D and the arrow D A backward traveling portion 22B that travels in a direction opposite to the direction is formed. Fluorine resin films S1 and S2 between the forward travel portion 21A of the endless belt 2A disposed on the lower side and the forward travel portion 21B of the endless belt 2B disposed on the upper side opposite to the endless belt 2A. And the continuous feed path 5 of the hand-shaped paper-type sheet S3 is formed from the middle. Therefore, the lower endless belt-like body 2A and the roll 3A attached thereto constitute a lower endless feed mechanism, and the upper endless belt-like body 2B and the roll 3B attached thereto constitute an upper endless feed mechanism. These endless feeding mechanisms feed the two fluororesin films S1 and S2 facing each other in the width direction overlapping portion in the direction of arrow D, sandwiching in the vertical direction.

  The above-described two stages of the lower heating units 61A and 62A and the two stages of the upper and lower heating units 61B and 62B face each other, and the lower cooling unit 63A and the upper cooling unit 63B also face each other. In addition, a pair of compacting rollers 7B and 7A are provided above and below the continuous feed path 5 between the upper and lower heating units 62B and 62A and the upper and lower cooling units 63B and 63A on the rear side. Yes.

In the figure, 8 is a guide plate for feeding the fluororesin films S1 and S2, and 9 and 10 are guide rollers for feeding the fluororesin films S1 and S2.
The overlapping width when the fluororesin films S1 and S2 are joined may be wider than the width of the hand-shaped paper sheet S3 from the middle.

As the endless belt, the surface of the core material of a belt-shaped body woven and woven of heat-resistant resin fibers such as fluororesin and polyimide resin or glass fiber is coated with the heat-resistant resin and the surface is smoothed. Both ends are bonded with an adhesive, or are melted by heating and bonded (fused connection) to make them endless.
As a method of smoothing the surface with a heat-resistant resin, a dispersion or solution in which a fluororesin is dispersed and dissolved in water or a solvent, for example, on the surface of the core material of a belt-shaped body woven and knitted with heat-resistant resin fibers or glass fibers A layer smoothed with a fluororesin can be formed by a method of coating and baking the material. Alternatively, the surface may be smoothed by attaching a fluororesin tape.

  Next, the operation will be described. For example, the setting temperatures of the lower heating unit 61A and the upper heating unit 61B in the front stage are the same, the setting temperatures of the lower heating unit 62A and the upper heating unit 62B in the rear stage are the same, and the upper heating unit 62A and the upper heating unit 62A are the same. The temperature of the heating unit 62B is set slightly higher than the set temperatures of the lower heating unit 61A and the upper heating unit 61B in the previous stage.

  After setting the temperatures of the upper and lower heating units 61A, 61B, 62A, and 62B, the fluororesin films S1 and S2 are placed in the continuous feed path 5 through the guide plate 8, and the hand-shaped paper sheet S3 from the middle. , And fed to the beginning of the continuous feed path 5 in a state of being overlapped. As a result, the fluororesin films S1, S2 are continuously fed in the direction D of the continuous feed path 5 at the same speed as the upper and lower endless strips 2A, 2B travel, and are sent to the fluororesin films S1, S2. Heating is performed by the upper and lower heating units 61A and 61B, followed by heating at a higher temperature by the upper and lower heating units 62A and 62B. The heating in this case is performed through the forward traveling portions 21A and 21B of the upper and lower endless strips 2A and 2B. The fluororesin films S1 and S2 are preheated by the upper and lower heating units 61A and 61B in this way, and the preheated films S1 and S2 are heated at a higher temperature than the upper and lower heating units 61A and 61B. When the heating units 62A and 62B are used, the overlapping portions are thermally welded with a small temperature difference between the front and back surfaces of the films S1 and S2. After heating the overlapping portion within a temperature range in which each of the films S1 and S2 melts and does not lead to thermal decomposition, preferably within a temperature range from the melting point of the film to 20 ° C. lower than the melting point of the film, The overlapped portion is thermally welded under pressure, preferably within a range of 0.1 to 5 MPa.

  The heat-welded films pressed by the pressure rollers 7A and 7B to the heat-welded fluororesin films S1 and S2 that have passed through the heating zone are welded together, and then the upper and lower cooling units 63B and 63A Rapid cooling is performed to form a film joint welded in a hand shape, and an integrated laminated film is taken out via the guide rollers 9 and 10 for feeding. Due to the rapid cooling by the above-described upper and lower cooling units 63B and 63A, the adhesive force of the film joining portion is remarkably improved.

  Next, the film joint portion of the laminated film taken out is cut into a hand shape, and a hand-shaped paper mold is extracted from the obtained hand-shaped cutting sheet, whereby a glove can be obtained.

It is sectional drawing which shows the positional relationship for manufacturing the glove of this invention. It is the schematic of a hand-shaped mold sheet. It is the schematic which shows the laminated sheet heat-welded. It is the schematic of the glove obtained by cut | disconnecting a film junction part. It is sectional drawing of the hot plate type continuous welding apparatus which manufactures the glove of this invention.

Explanation of symbols

11a, 11b Hot plates 12a, 12b Film 13 Hand-shaped mold sheet S1, S2 Film S2 Hand-shaped mold sheet D Arrows 2A, 2B indicating the feeding direction of the film Endless belt 5 Feeding path 9, 10 Guide roller for feeding 21A, 21B Forward traveling sections 61A, 62A, 61B, 62B Heating units 63A, 63B Cooling units

Claims (3)

  A hand-shaped mold was inserted between the two fluororesin films, and the two fluororesin films were superposed, the overlapping portions of the films were heat-sealed, A method for producing a fluororesin glove, comprising forming a film joint, then cutting the film joint into a hand shape, and extracting a hand-shaped mold from the resulting hand-shaped cutting sheet.   The method for producing a fluororesin glove according to claim 1, wherein the hand-shaped mold is a paper material.   Inserting a hand-shaped paper mold between two fluororesin films, and feeding them from both sides of the forward running section of a pair of endless strips that are sandwiched from the top and bottom with the two fluororesin films superimposed By pressing while heating, the overlapping part of the fluororesin film is heat-sealed to form the film joint part welded in a hand shape and taken out from the forward travel part of the endless belt, and then the film joint A method for producing a fluororesin glove, wherein the part is cut into a hand shape, and a hand-shaped paper mold is extracted from the obtained hand-shaped cutting sheet.

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