JP5456373B2 - Spatter adhesion prevention sheet - Google Patents

Description

  The present invention relates to a spatter adhesion preventing sheet for preventing spatter scattered when welding a steel material or the like from adhering to a portion other than a welded portion of a workpiece, a welding machine, and peripheral devices.

  When performing welding such as arc welding or laser welding, spatter is scattered and adheres to parts other than the welded portion of the workpiece, the welding machine, and peripheral equipment. When the spatter thus scattered adheres to the work piece, not only the appearance as a product is impaired, but also a situation may occur in which the attachment with the other members remains due to the adhering spatter. On the other hand, when scattered spatter adheres to a welding machine or peripheral equipment, not only the appearance of these equipments deteriorates but also the situation where the equipments corrode may occur. Therefore, it was necessary to periodically remove spatter from the surface of the equipment using a tool such as a chisel.

  In order to prevent the above-described problems, in recent years, a method of covering an object to be welded, a welding machine, and peripheral devices with a sheet has been adopted. As such a protective sheet, a protective sheet made of self-extinguishing paper filled with a powder of a water-containing inorganic compound that undergoes an endothermic decomposition reaction and an inorganic powder made of organic fiber has been proposed as disclosed in Patent Document 1.

JP 2000-237873 A

  However, although the above-described conventional protective sheet exhibits a certain degree of heat resistance, it cannot be said that durability over a long period of time is necessarily sufficient. There was a problem that it had to be peeled off from the equipment, and the workpiece, welder and peripheral equipment had to be covered again with a new one. In addition, since the conventional protective sheet is made of paper, it has poor flexibility, and if the work piece, welder, or peripheral device has a complicated shape, it is fitted to fit the shape. I couldn't wear it.

  An object of the present invention is to solve the problems of the conventional spatter adhesion preventing sheet and to exhibit a stable spatter adhesion preventing function over a long period of time, and also to be welded, welder and peripheral equipment. Is to provide a practical spatter adhesion preventing sheet that can be fitted and attached so as to match the shape even if it has a complicated shape.

Of the present invention, the invention described in claim 1 is a sputter adhesion preventing sheet for preventing the adhesion of spatter scatter when subjected to welding to the welded object, the grain from the hollow filler and the hollow filler It is formed of a silicone-based resin to which a non-hollow filler having a small diameter is added, has a thickness of 0.1 mm to 3.0 mm, and the hollow filler has a particle diameter of 10 μm to 50 μm. It is what.

  The invention described in claim 2 is characterized in that, in the invention described in claim 1, an adhesive layer is laminated on one side.

  The invention described in claim 3 is the invention described in claim 1 or 2, wherein the silicone resin is at least one of acrylic modified silicone, silicone modified acrylic, and urethane modified silicone. It is characterized by this.

  The invention described in claim 4 is the invention described in any one of claims 1 to 3, wherein the hollow filler is hollow glass particles and / or hollow ceramic particles.

  The invention described in claim 5 is the invention described in any one of claims 1 to 4, wherein the non-hollow filler is one of titania particles, potassium titanate particles, silica particles, alumina particles, and boron nitride particles. It is characterized by being at least one of the above.

  Since the spatter adhesion preventing sheet according to the present invention is excellent in heat resistance and durability, by covering the outer periphery of an object to be welded, a welder or a peripheral device, the material to be welded, the welder or the peripheral device is covered. The situation where spatter adheres can be effectively prevented over an extremely long period of time. Moreover, since the spatter adhesion preventing sheet of the present invention is very flexible, even if the object to be welded, the welding machine or the peripheral device has a complicated shape, it is suitable for the shape. It is possible to fit and paste.

  Further, by laminating the pressure-sensitive adhesive layer on one side, it can be easily attached to an object to be welded, a welding machine or peripheral equipment. Furthermore, by adjusting the adhesive strength of the pressure-sensitive adhesive layer, it becomes possible to re-adhere after re-peeling, and to prevent spatter from adhering to the workpiece, welder and peripheral equipment at a very low cost. Is possible.

It is explanatory drawing which shows the mode of the cross section of a spatter adhesion prevention sheet.

  The spatter adhesion preventing sheet of the present invention is formed of a silicone resin obtained by adding a hollow filler and a non-hollow filler. As the silicone-based resin, a silicone resin having high heat resistance (about 200 ° C. or more) can be used alone, or a blend of a silicone resin and another resin can be used. It is also possible to use a silicone-modified resin obtained by modifying a part of the silicone-based resin. As the silicone-based resin, acrylic-modified silicone, urethane-modified silicone, or the like can be suitably used. As the silicone-modified resin, silicone-modified acrylic resin, silicone-modified urethane resin, or the like can be suitably used.

  Further, it is necessary to add a filler to the silicone resin constituting the spatter adhesion preventing sheet. Furthermore, as the filler to be added to the silicone resin, it is necessary to simultaneously use two kinds of fillers, that is, an inorganic hollow filler for enhancing the heat insulation effect and a non-hollow filler for enhancing the spatter adhesion preventing performance. is there.

  As the hollow filler, hollow glass particles and hollow ceramic particles can be suitably used, and they can also be mixed and used. By adding these hollow fillers, it becomes possible to block heat from the sputter at the surface layer portion, and to prevent thermal degradation of the entire sheet. The particle size of the hollow filler is not particularly limited, but is preferably 1 μm or more and 100 μm or less, and more preferably 10 μm or more and 50 μm or less.

  On the other hand, non-hollow fillers include inorganic particles such as metal oxides such as silica, alumina, zirconia and titania, nitrides such as boron nitride and aluminum nitride, PTFE (polytetrafluoroethylene), PFA (tetrafluoroethylene). -Fluororesin powder such as perfluoroalkyl vinyl ether copolymer) can be suitably used. In addition, the shape of the non-hollow filler is not particularly limited, and fillers of various shapes such as amorphous, spherical, scale-like, and fibrous can be suitably used. In addition, the particle size of the non-hollow filler is not particularly limited, but is preferably 0.1 μm or more and 50 μm or less. Moreover, it is more preferable to use a material having a particle size smaller than that of the hollow filler.

  On the other hand, in addition to the filler, a flame retardant for making the sheet flame-retardant can be added to the silicone resin constituting the spatter adhesion preventing sheet. The type of the flame retardant is not particularly limited, and phosphorous, inorganic, and halogen-based ones can be suitably used. However, it is preferable to use an inorganic flame retardant because it does not adversely affect the environment. .

  In addition, the spatter adhesion preventing sheet can be used alone, but can also be used as a laminated sheet in which an adhesive layer is laminated on one side. In addition, since the sheet base material layer (part other than the pressure-sensitive adhesive layer) has a high heat insulating function, in addition to the relatively heat-resistant silicone pressure-sensitive adhesive, an acrylic pressure-sensitive adhesive or rubber pressure-sensitive adhesive with poor heat resistance Can also be used.

  Furthermore, the adhesion strength of the spatter adhesion preventing sheet can be adjusted by changing the type of the pressure-sensitive adhesive according to the application. For example, when forming a spatter adhesion preventing sheet for temporarily covering a place where spatter adhesion is desired, it is preferable to select a pressure-sensitive adhesive having a low adhesive strength. On the other hand, when forming a spatter adhesion preventing sheet for covering a place where spatter adhesion is desired to be prevented over a long period of time, it is preferable to select a pressure sensitive adhesive having a high adhesive strength.

  As a method for laminating the pressure-sensitive adhesive layer, a method of forming a sheet base material layer by casting a resin solution on a pre-formed pressure-sensitive adhesive layer, or a resin as a pressure-sensitive adhesive was dissolved in a solvent. A method of applying the solution to one side of the sheet base material layer can be used. Moreover, it is also possible to use the method of sticking a double-sided adhesive tape to a sheet | seat base material. In addition, it can be configured to self-adhere by applying a binder to the sheet substrate. In such a configuration, the spatter adhesion preventing sheet can be attached to a desired place without using an adhesive.

  In addition, when the pressure-sensitive adhesive layer is laminated on the sheet base material, it can be laminated on the entire surface of the sheet base material, or can be laminated on a part of the sheet base material. As mentioned above, the spatter adhesion preventing sheet is pre-laminated with an adhesive layer, which not only simplifies the work when covering workpieces, welders and peripheral equipment, but also wraps them around. Since it becomes easy (especially cords etc.), it becomes possible to more effectively prevent the spatter from adhering to the workpiece, the welding machine and the peripheral equipment.

  The thickness of the sheet base material is not particularly limited, but is preferably 0.1 mm or more and 3.0 mm or less. When the thickness of the sheet base material exceeds 3.0 mm, the followability to the shape of the adherend is deteriorated, which is not preferable. On the other hand, when the thickness is less than 0.1 mm, the heat insulating effect becomes insufficient. This is not preferable because there is a possibility that the impact at the time of spattering may not be absorbed.

  On the other hand, the spatter adhesion preventing sheet can also color the sheet substrate for the purpose of alerting or identifying. The coloring method of the sheet base material is not particularly limited, but it is possible to use a method of adding a colored pigment / dye into the resin when forming the sheet base material, and a resin added with a coloring pigment / dye can be used. It is also possible to use a method in which the dissolved solution is applied to one side (the side opposite to the adhesive layer) of the formed sheet base material. If a method of adding a color pigment / dye to the resin is employed when forming the sheet base material, there is an advantage that a situation in which color fading due to flying sputtering does not occur.

  EXAMPLES Hereinafter, the present invention will be described in more detail with reference to examples. However, the present invention is not limited to the embodiments of the examples, and can be appropriately changed without departing from the spirit of the present invention. is there. Evaluation methods of physical properties and characteristics in the examples are as follows.

<Spatter adhesion>
The spatter adhesion preventing sheet was attached to predetermined portions (curved surface portion, L-shaped bent portion, quadrangular column protruding portion) of the welding machine and peripheral devices, and was wound around the cord of the welding machine. Then, welding (arc welding: welding current 200A, about 10) in the vicinity of those spatter adhesion preventing sheets (about 0.3 to 1 m away from the welding machine and peripheral equipment and about 30 to 50 cm away from the cord). Second welding at a frequency of 20 times / hr, laser welding: CO ₂ laser (2 kW), scanning speed of 1.5 m / min, welding for about 10 seconds at a frequency of 10 times / hr) in one month It was repeatedly executed. And the adhesion degree of the sputter | spatter to the spatter adhesion prevention sheet | seat at that time was evaluated in the following three steps.
○: Spatter that was scattered hardly adhered to the spatter adhesion prevention sheet, and the spatter remaining on the sheet could be easily swept away with a brush. △: Part of the spatter adhered to the spatter adhesion prevention sheet (fusion). (Difficult to sweep with a brush)
X: Thermal deterioration of the spatter adhesion preventing sheet due to spatter adhesion (fusion) is remarkable.

<Removability>
The spatter adhesion preventing sheet was affixed to the surface of the cylindrical workpiece (in the vicinity of the welded portion). Then, arc welding for about 10 seconds was performed on the workpiece. And after welding to the to-be-welded object in that way, when the spatter adhesion prevention sheet was peeled off again, it was evaluated in the following three steps whether or not the pressure-sensitive adhesive layer maintained the adhesiveness.
○: Removable and no adhesive residue on the work piece. Δ: Removable but adhesive remaining on the work piece.

<Example 1>
In the acrylic modified silicone resin, 15 parts by weight of hollow glass particles (particle size of about 15 μm) are added as hollow fillers, and titania particles (particle size of about 1 μm) and potassium titanate fibrous particles (short diameter of about 1 μm) as non-hollow fillers. 0.5 μm × major axis of about 15 μm) was added in an amount of 10 parts by weight and 2 parts by weight, respectively. Then, the resin solution to which these particles were added was sufficiently stirred to sufficiently disperse the particles in the solution, thereby obtaining a resin solution for forming a sheet base material. Thereafter, the resin solution is cast on a metal plate whose surface has been subjected to a mold release treatment, and heat-treated (200 ° C. × 1 min.), Whereby an acrylic-modified silicone resin sheet (sheet base material) having a thickness of about 0.5 mm. Got. Furthermore, a silicone adhesive (KR-3700 manufactured by Shin-Etsu Chemical Co., Ltd.) was applied to one side of the obtained sheet base material using screen printing, and heat-treated again (150 ° C. × 30 sec.). No. 1 spatter adhesion prevention was obtained. The state of the cross section of the obtained spatter adhesion preventing sheet is shown in FIG. An adhesive layer having a thickness of about 10 μm is laminated on the back surface of the sheet base material.

  Then, the “spatter adhesion degree” of the obtained spatter adhesion preventing sheet was evaluated by the method described above. In the evaluation of “spatter adhesion”, arc welding was repeatedly performed. The spatter adhesion preventing sheet was attached to the curved surface portion and the cord of the welding machine. As a result, almost no scattered spatter adhered to the spatter adhesion preventing sheet of Example 1, and the spatter remaining slightly on the sheet could be easily swept away with a brush. In addition, it was possible to maintain such spatter adhesion preventing performance for over a month. Table 1 shows the evaluation results of the composition and characteristics of the spatter adhesion preventing sheet of Example 1.

<Example 2>
13 parts by weight of hollow ceramic particles (particle size of about 45 μm) are added as a hollow filler to the silicone-modified acrylic resin emulsion, and silica particles (particle size of about 3 μm) and alumina particles (particle size of about 0.2 μm) are used as non-hollow fillers. Were added by 5 parts by weight and 7 parts by weight, respectively. Then, the resin solution to which these particles were added was sufficiently stirred to sufficiently disperse the particles in the solution, thereby obtaining a resin solution for forming a sheet base material. On the other hand, the above-mentioned resin solution for forming a sheet base material is cast on a double-sided tape (7021 double-sided tape manufactured by Teraoka Seisakusho Co., Ltd.) using an acrylic pressure-sensitive adhesive, and water as a solvent is evaporated sufficiently over time Thus, a spatter adhesion preventing sheet of Example 2 was obtained by forming a sheet base layer (silicone-modified acrylic resin layer) having a thickness of about 1 mm.

  Then, the “spatter adhesion degree” of the obtained spatter adhesion preventing sheet was evaluated by the method described above. In the evaluation of “spatter adhesion”, arc welding was repeatedly performed. In addition, the spatter adhesion preventing sheet was affixed to the L-shaped bent portion of the welding machine and the cord. As a result, almost no spatter adhered to the spatter adhesion preventing sheet of Example 2, and the spatter remaining slightly on the sheet could be easily swept away with a brush. In addition, it was possible to maintain such spatter adhesion preventing performance for over a month. Table 1 shows the evaluation results of the composition and characteristics of the spatter adhesion preventing sheet of Example 2.

<Example 3>
To the urethane-modified silicone resin, 18 parts by weight of hollow ceramic particles (particle size of about 30 μm) are added as a hollow filler, and silica particles (particle size of about 1 μm) and boron nitride layered particles (plane direction diameter of about 5 μm × 4 parts by weight and 8 parts by weight were respectively added. Then, the resin solution to which these particles were added was sufficiently stirred to sufficiently disperse the particles in the solution, thereby obtaining a resin solution for forming a sheet base material. Thereafter, the resin solution is cast on a release-treated metal plate and heat-treated (200 ° C. × 3 min.) To obtain a urethane-modified silicone resin sheet (sheet base material) having a thickness of about 0.7 mm. Obtained. Furthermore, the spatter adhesion prevention sheet of Example 3 was obtained by sticking a double-sided tape (7470 double-sided tape; manufactured by Teraoka Seisakusho; made of a silicone-based adhesive) to one side of the obtained sheet base material.

  Then, the “spatter adhesion degree” of the obtained spatter adhesion preventing sheet was evaluated by the method described above. In the evaluation of “spatter adhesion”, laser welding was repeatedly performed. In addition, the spatter adhesion preventing sheet was attached to a portion protruding in a quadrangular column shape and a cord of the welding machine. As a result, almost no spatter adhered to the spatter adhesion preventing sheet of Example 3, and the spatter remaining slightly on the sheet could be easily swept away with a brush. In addition, it was possible to maintain such spatter adhesion preventing performance for over a month. Table 1 shows the evaluation results of the composition and characteristics of the spatter adhesion preventing sheet of Example 3.

<Example 4>
15 parts by weight of hollow ceramic particles (particle size of about 50 μm) are added as a hollow filler to the resin solution obtained in the same manner as in Example 1, and silica particles (particle size of about 3 μm) and alumina particles are used as a non-hollow filler. (Particle size of about 0.2 μm) was added in an amount of 5 parts by weight and 5 parts by weight, respectively. Further, 3 parts by weight of a red pigment (Zr—Si—Fe pigment) was added as a colorant to the resin solution. And the resin solution which added those particle | grains and a pigment was fully stirred, and the resin solution for sheet | seat base material formation was obtained by fully disperse | distributing particle | grains and a pigment in a solution. Thereafter, the resin solution is cast on a release-treated metal plate, and heat-treated (200 ° C. × 1 min.) To give a red-colored acrylic-modified silicone resin sheet (sheet of about 0.5 mm). Substrate) was obtained. Furthermore, the spatter adhesion prevention sheet of Example 4 was obtained by sticking a double-sided pressure-sensitive adhesive tape (769 double-sided tape manufactured by Teraoka Seisakusho; made of a silicone-based pressure-sensitive adhesive) on one side of the obtained sheet base material.

  Then, the “removability” of the obtained spatter adhesion preventing sheet was evaluated by the method described above. As a result, almost no spatter adheres to the spatter adhesion preventing sheet of Example 4, and it can be easily re-peeled after welding the work piece, and the pressure-sensitive adhesive layer retains adhesiveness. It was. Table 1 shows the evaluation results of the composition and characteristics of the spatter adhesion preventing sheet of Example 4.

<Comparative Example 1>
A spatter adhesion preventing sheet of Comparative Example 1 was obtained in the same manner as in Example 1 except that the resin used for preparing the resin solution for forming the sheet base material was changed to urethane resin. Then, the “spatter adhesion degree” of the obtained spatter adhesion preventing sheet was evaluated by the method described above. In the evaluation of “spatter adhesion”, arc welding was repeatedly performed. The spatter adhesion preventing sheet was attached to the curved surface portion and the cord of the welding machine. As a result, the spatter adhesion preventing sheet of Comparative Example 1 was deteriorated by the heat of sputtering, and the function of protecting the welding machine and the cord disappeared in several days.

<Comparative example 2>
Into the resin solution obtained in the same manner as in Example 1, 15 parts by weight of alumina particles (particle size: about 0.5 μm) were added and stirred sufficiently to fully disperse the particles in the solution. A resin solution for material formation was obtained. Thereafter, the resin solution was cast on a release-treated metal and heat-treated (200 ° C. × 1 min.) To obtain an acrylic-modified silicone resin sheet (sheet base material) having a thickness of 0.5 mm. . Further, a double-sided pressure-sensitive adhesive tape (7021 double-sided tape manufactured by Teraoka Seisakusho; made of an acrylic pressure-sensitive adhesive) was affixed to one side of the obtained sheet material to obtain a spatter adhesion preventing sheet of Comparative Example 2.

  Then, the “spatter adhesion degree” of the obtained spatter adhesion preventing sheet was evaluated by the method described above. In the evaluation of “spatter adhesion”, laser welding was repeatedly performed. In addition, the spatter adhesion preventing sheet was attached to a portion protruding in a quadrangular column shape and a cord of the welding machine. As a result, in the spatter adhesion preventing sheet of Comparative Example 2, the pressure-sensitive adhesive layer was deteriorated by the heat of sputtering, and the function of protecting the welding machine and the cord disappeared in several days.

  Since the spatter adhesion preventing sheet of the present invention has excellent effects as described above, it is preferably used as a cover member for protecting the workpiece, welder and peripheral equipment from spatter scattered during welding operations. Can do.

1 .... Spatter adhesion prevention sheet 2 .... Sheet base material layer 3 .... Adhesive layer

Claims (5)

A spatter adhesion preventing sheet for preventing adhesion of spatter scattered when performing welding on a workpiece,
While being formed by a silicone resin formed by adding a hollow filler and a non-hollow filler having a particle size smaller than that of the hollow filler ,
A spatter adhesion preventing sheet , wherein the thickness is from 0.1 mm to 3.0 mm, and the particle diameter of the hollow filler is from 10 μm to 50 μm .   The spatter adhesion preventing sheet according to claim 1, wherein an adhesive layer is laminated on one side.   The spatter adhesion preventing sheet according to claim 1, wherein the silicone-based resin is at least one of acrylic modified silicone, silicone modified acrylic, and urethane modified silicone.   The spatter adhesion preventing sheet according to any one of claims 1 to 3, wherein the hollow filler is hollow glass particles and / or hollow ceramic particles.   The sputter adhesion according to any one of claims 1 to 4, wherein the non-hollow filler is at least one of titania particles, potassium titanate particles, silica particles, alumina particles, and boron nitride particles. Prevention sheet.

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