JP4103990B2 - Static electricity removal structure and through box using this structure - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a static electricity removing (static electricity removing and / or preventing) structure and a pass box (an antistatic molded product) using the structure.
[0002]
[Prior art]
As is well known, static electricity is generated in all materials by friction. However, static electricity generated in a substance having a small fixed resistance value flows (discharges) and is not charged. On the contrary, static electricity generated in a substance having a large specific resistance value does not flow and is accumulated and charged. And, the difference between "static, conductive, static elimination" and "antistatic" intended by the present invention is described. This conductive means that there is a substance that does not pass electricity and a substance that does not pass electricity. Is referred to as conductivity. When the order of conduction is listed, conductor->semiconductor-> insulator. Note that the resistivity can be lowered by providing the insulator with a conductive material by mixing, coating, printing, plating, or the like. Further, static elimination means that charged static electricity is forcibly attenuated by ground. And, it takes time for the static elimination to be attenuated when grounding is required or when static electricity is charged in a substance having a large specific resistance value. Therefore, it is extremely beneficial and effective to perform grounding using a surface instead of a point. In addition, the antistatic means that the volume specific resistance value on the surface of a substance having a large specific resistance value is improved to be small so that electricity can easily flow to prevent charging.
[0003]
What is important here is that the antistatic effect is naturally limited. The reason is that the decay time of static electricity varies depending on the surface of the material and the specific volume resistivity. For example, if the specific resistivity of a substance is increased, the limit of whether or not it is antistatic is known, but there is no limit to antistatic if it is a constant quality from 10 6 to 10 8. .
[0004]
Because of the above, grounding is required for static elimination. For example, if the surface resistance value has an antistatic effect of 10 6 to 10 8 Ω constant, the generated static electricity is in the atmosphere. It is not necessary to take the ground because it is discharged. And grounding is necessary in a vacuum.
[0005]
In addition, since there is a plastic box as an object in which static electricity is likely to be generated, the relationship between static electricity and plastic will be described. [1] In the first place, plastic molding is commercialized by melting resin with heat, pushing it into a mold at high speed and high pressure, cooling it with water, and taking it out. That is, since it is poured into the mold at high speed and high pressure, when it becomes a processed product or a plastic processed product (referred to as a product), the product is like a lump of static electricity. [2] The more precise the product, the more important it is to prevent static electricity. [3] Therefore, the current situation is that a general company applies an expensive conductive resin to remove electricity. [4] Under these circumstances, the applicant or related facility has developed a structure that has excellent electrical conductivity of the static electricity removing sheet and can be manufactured at low cost, and the inner bottom plate (laying plate) of the box and the lid As a result of experiments conducted in the same manner, it was found that a remarkable effect could be confirmed, or that the cost could be sufficiently obtained.
[0006]
As a document relating to this, there is an invention of carbon black-containing paper disclosed in JP-A-7-3697. This invention is made by adding an anionic latex of a carboxy-modified polymer, an aqueous dispersion, or the like to a cellulose fiber slurry made of wood pulp, cotton fiber, cotton, plant pulp, recovered waste paper, etc., in which carbon black is dispersed, and then fixing. In addition, carbon black-containing paper is characterized in that an auxiliary agent is added during paper making to produce paper, and a paper with high carbon black content, small carbon powder detachment, and high strength can be obtained. Or that paper can be used as a static eliminating material, an electromagnetic shielding material, a sheet heating element, or the like, or can prevent carbon from falling off.
[0007]
[Problems to be solved by the invention]
The document is a carbon black-containing paper obtained by adding a resinous adhesive (anionic latex of a carboxy-modified polymer) or an aqueous dispersion to a cellulose fiber slurry containing carbon black. Therefore, the effect of preventing static electricity can be achieved. However, when cellulosic fiber slurry is used as a base material, peeling of paper dust becomes a problem, but this treatment is not sufficient and becomes a problem in use. For example, when used as a box for precision products, paper dust adheres to precision products and causes dust, and it takes work, time to remove the dust, or processing means. There is a problem to be improved, such as requiring equipment. In addition, if a defective product is partially generated, problems such as the use of the defective product, waste of labor based on the processing of the defective product, secondary pollution, or an economic blow occur.
[0008]
And, the intended place of the present invention is that approximately 50% or more of the products handled by the company to which the present applicant is related are plastic products, and the products are only a small variety of products. Therefore, it takes a long time to stock the product, and dust sometimes adheres to the product, resulting in a defective product. For this reason, in some companies, some companies apply conductive resin to the surface of plastic corrugated board, and the lid of the pass box also applies conductive resin to plastic vacuum-molded ones. Although it was found that it was removed, it was found that it was expensive and was not practically used. The present invention can be used as an improvement plan. For example, an electrically conductive static electricity removal structure and a through box using this structure are manufactured using inexpensive fibers with good electrical conductivity.
[0009]
At this time, there is a demand for a box having a structure in which paper dust does not adhere to the product. Provided is a static electricity removing structure in which the paper dust does not adhere to a product, and a through box using the structure. In addition, other companies (for example, carbon fiber end loss manufacturers ) have difficulty in treating the carbon fiber waste. A part of the present invention is that the present invention can be used.
[0010]
[Means for Solving the Problems]
The invention according to claim 1 provides a static electricity removing structure which is a structure in which paper dust does not adhere to a product and which is manufactured using inexpensive fibers having good electrical conductivity. It is also intended to effectively use or reuse the waste material treatment of carbon fiber end loss. Furthermore, the present invention provides a static eliminating structure having a structure suitable for molding (manufacturing) at a low cost by using basic materials of pulp fibers, carbon fibers and thermoplastic polymer fibers.
[0011]
In claim 1, pulp fiber, carbon fiber, and thermoplastic polymer fiber are mixed to produce a mud-like pulp material, and the pulp material is produced by means such as sheeting and papermaking. The conductive sheet mixed with carbon fiber is dried after this production, and the water-soluble emulsion chemical is added to the pulp material that has been made muddy using moisture as a medium by either spraying, filling, or coating. It is a conductive sheet configured by performing paper dust prevention treatment,
This is a static eliminating structure in which this conductive sheet is provided on at least one surface of a core material.
[0012]
The invention of claim 2 discloses an optimum blending ratio to achieve the object of claim 1.
[0013]
A second aspect of the present invention is a static electricity removing structure having a structure in which the pulp fiber, the carbon fiber, and the thermoplastic polymer fiber according to the first aspect are blended in the following ratio.
Mixing ratio,
100 parts by weight of pulp fiber, 1-20 parts by weight of carbon fiber, 0-20 parts by weight of thermoplastic polymer fiber
The invention of claim 3 discloses an optimum manufacturing method for achieving the object of claim 1.
[0015]
A third aspect of the present invention is a static electricity removing structure having a configuration using thermal processing in which the extension according to the first aspect is configured to perform processing such as papermaking, roll molding, press molding, or molding.
[0016]
The invention of claim 4 provides a static electricity removal structure passing box that is manufactured using inexpensive fibers having good electrical conductivity and paper dust does not adhere to the product. Moreover, when manufacturing the static electricity removal structure passing box, it is intended to effectively utilize or reuse the waste material treatment of the carbon fiber end loss. Furthermore, a static electricity removal structure passing box having a structure suitable for molding (manufacturing) at low cost is provided by using basic materials of pulp fibers, carbon fibers, and thermoplastic polymer fibers.
[0017]
Claim 4 is a mixture of pulp fiber, carbon fiber, and thermoplastic polymer fiber to produce a mud-like pulp material, and the pulp material is produced by means such as sheeting and papermaking. A static electricity removing structure having a conductive sheet mixed with carbon fiber on at least one surface of the core, and at least a partition portion or a bottom portion, a side portion, or a side portion of a box formed by the static electricity removing structure, or A processed product formed with a lid, or a through box for processed plastic products.
[0018]
The invention of claim 5 provides a static elimination structure passing box that is manufactured using inexpensive fibers having good electrical conductivity, and having a room having a structure in which paper dust does not adhere to a product. In addition, when manufacturing this static electricity removal structure passing box, it is intended to effectively utilize or reuse the waste material treatment of carbon fiber end loss. In addition, using a basic material of pulp fiber, carbon fiber, and thermoplastic polymer fiber, the static electricity removal structure is equipped with a room that is low in cost and has a structure that prevents paper dust with a structure suitable for molding (manufacturing) from adhering to the product. Provide a pass-through box.
[0019]
According to a fifth aspect of the present invention, there is provided a processed product or a processed box for a plastic processed product or the like having a static electricity removal chamber as a processed product or plastic processed product formed in the pass box according to the fourth aspect.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
The embodiment of the present invention will be described. As shown in the flowchart of FIG. 1, pulp fibers and pulverizers, pulverizers, stirring and mixing machines, pulverizing and mixing machines, etc. The carbon fiber or the like is added, and the pulp fiber and the carbon fiber are beaten and / or stirred and pulverized to a predetermined size. In this operation, conductive particles (referred to as pulverized particles) made of beaten and / or pulverized pulp fibers and carbon fibers are generated. The pulverized particles are subjected to water repellency or water resistance treatment using moisture as a medium to form water-soluble pulverized particles (a muddy pulp material, so-called slurry). In this step, by making the pulp material muddy using moisture as a medium, the efficiency and simplification of the operation can be achieved, and a reliable and high-quality muddy pulp material can be generated. Thereafter, in this example, two routes ( [1] and [2] below) are followed. Each of these routes will be described individually. The application of moisture can be performed by any method, for example, spraying, filling, coating, etc., and a simple and reliable method is adopted.
[0021]
[1] In the first route (wet forming route), a conductive sheet is produced through a paper making process as if paper making. After the conductive sheet is dried (or dried), paper dust prevention treatment is performed. In this paper dust prevention treatment, a chemical such as a water-soluble emulsion is added by any method to a pulp material made muddy with water as a medium. The addition includes, for example, spraying, filling, and application, and a simple and reliable method is adopted. In this step, the paper dust prevention treatment can surely press the paper dust sprayed on the surface by the drying step, and ensure the planar smoothness. In addition, there is a feature that is useful for producing a reliable and high-quality conductive sheet by reducing paper dust in a subsequent process, eliminating troubles caused by the fall, improving efficiency and simplification of work, and the like. In addition, this paper dust prevention treatment uses a heat press such as a roll press machine in a subsequent process, for example, a lamination and / or thermocompression bonding process, and uses pressure bonding by heat, in a substantially natural state, This is advantageous because the planar smoothness can be ensured. In the lamination and / or thermocompression process of this step, as a core material, for example, a recycled product of a milk pack, a corrugated cardboard core or other paper core material (useful for reuse), a plastic core material (for reuse) A conductive sheet is attached to at least one surface of the core material using a degradable plastic, although it is a little problematic. Of course, although not shown, it is possible to stack only conductive sheets. In any case, the number of conductive sheets can be one, but if the number of sheets increases, a reasonable charge removal effect can be expected. In addition, the conductive sheet can be used by only one sheet, but it is useful when there is no problem of breakage due to strength, tension or the like. The static electricity removing structure manufactured by this lamination and / or thermocompression bonding process has two routes (a paperboard forming route and a dry forming route). This paperboard forming route cuts unnecessary portions using trimming. After this cutting, the dust, dust, soot, etc. adhering using an air process are removed and it is set as a finished product. The dry molding route branches before and after the laminated thermocompression bonding, and after press molding with a press molding machine, etc., dust, dust or soot that adheres using an air process is eliminated, and a static elimination structure with a predetermined shape Manufacture products.
[0022]
[2] The second route (wet forming route) is formed together with the paper making process, and the paper making sensation and forming are integrated to produce a wet conductive sheet material. This is a method for carrying out paper dust prevention treatment on this conductive sheet material, which is the simplest method and can contribute to mass production and cost reduction. The characteristics of this example are also the same as those described above. Then, the static elimination structure product of a predetermined shape is manufactured by press molding with a hot press or the like together with the core material. Other configurations and / or features are similar to those described above.
[0023]
【Example】
An embodiment of the present invention will be described below.
[0024]
1 is a mixture of pulp fiber 1a, carbon fiber 1b, and thermoplastic polymer fiber 1c, producing a mud-like pulp material, spreading the pulp material into a sheet, and mixing the carbon fiber in the pulp fiber. The static electricity removing structure 3 is manufactured by providing the conductive sheet 1 on at least one surface of the core material 2. The above-described example is ideal for the method of manufacturing the conductive sheet 1 and the static electricity removing structure 3. An example in which the static electricity removing structure 3 is molded is a static electricity removing structure product 30 having an uneven cross section shown in FIG. Of course, flat and other variations are possible.
[0025]
4 is a pass box configured by using the static electricity removing structure 3, and the static electricity removing structure 3 is used for the whole or a part of the pass box 4. In one example, a rug, a partition plate, a lid plate (top plate), a side wall, and the like. The accommodation room is composed of at least the static electricity removing structure 3. The adhesion of dust, dust and other foreign matters to the processed product housed in the pass box 4 and the effect of static elimination were confirmed to be no adhesion even after one month, The neutralization effect was confirmed. In addition, by providing the conductive sheet 1 or the static electricity removing structure 3 etc. to electrical products (electrical parts, etc.) such as personal computers, printers, vacuum tubes, substrates, etc., it is possible to prevent the adhesion of foreign matters such as dust and dust, and to eliminate static electricity. In addition, there is a feature that the function can be maintained or the durability, durability, etc. can be ensured. In addition, the above-mentioned effect can be expected by use as a work table, a desk, a curtain, or a wall material of each room, factory, or the like.
[0026]
In addition, in various works and constructions, other workplaces, getting on and off vehicles, etc., we intend to remove static electricity with the intention of attaching and removing dust, avoiding accidents and eliminating discomfort. At this time, one or several conductive sheets 1 or static electricity removing structures 3 etc. are provided (attached) on cuffs, collars, pockets, and other parts of clothes (work clothes), so that it is reliable and easy. It has features such as being able to eliminate static electricity, being useful and useful, and contributing to work safety, speeding up, simplification, or cost reduction. In addition, there are benefits such as avoiding the use of work clothes for removing static electricity or helping to reduce all costs required for this type of clothing. It also helps prevent clothes from being worn, such as kimonos, skirts, and pants, and eliminates the sense of discomfort, maintains style, secures the appearance, affects the body, and has the same characteristics as the work clothes described above. And the conductive sheet 1 or the static electricity removal structure 3 etc. are provided in the bottom part of a box, and the same effect and characteristic as above-mentioned regarding static electricity removal can be anticipated. It is also considered useful for maintaining the freshness of food or releasing gas.
[0027]
【The invention's effect】
The invention according to claim 1 is a mixture of pulp fiber, carbon fiber, and thermoplastic polymer fiber to produce a muddy pulp material, and the pulp material is produced by means such as sheeting and papermaking. The conductive sheet mixed with carbon fiber is dried after production, and the water-soluble emulsion chemical is added to the pulp material that has been made muddy using moisture as a medium by spraying, filling, or coating. A conductive sheet configured by performing a paper dust prevention process, wherein the conductive sheet is provided on at least one surface of a core material. Therefore, it is possible to provide a static electricity removing structure that is manufactured using inexpensive fibers having good electrical conductivity and having no paper dust attached to the product. In addition, carbon fiber end loss waste material treatment can be effectively used or reused. Further, by using basic materials of pulp fibers, carbon fibers, and thermoplastic polymer fibers, it is possible to provide a static eliminating structure having a structure suitable for molding (manufacturing) at low cost.
[0028]
Invention of Claim 2 is the static electricity removal structure of the structure which made the pulp fiber of Claim 1, carbon fiber, and thermoplastic polymer fiber the following compounding ratio. The blending ratio is 100 parts by weight for pulp fibers, 1 to 20 parts by weight for carbon fibers, and 0 to 20 parts by weight for thermoplastic polymer fibers. Accordingly, the optimum blending ratio to achieve the object of claim 1 is disclosed.
[0029]
A third aspect of the present invention is a static electricity removing structure having a configuration utilizing thermal processing in which the extension according to the first aspect is configured to perform processing such as papermaking, roll molding, press molding, or molding. Accordingly, an optimum manufacturing method for achieving the object of claim 1 has been disclosed.
[0030]
According to a fourth aspect of the present invention, a pulp fiber, a carbon fiber, and a thermoplastic polymer fiber are mixed to produce a muddy pulp material. A static electricity removing structure having a conductive sheet mixed with carbon fibers in at least one surface of the core, and at least a partition part or a bottom part of the box formed by the static electricity removing structure, a side part, or A processed product formed with a lid, or a through box for processed plastic products. Therefore, it is possible to provide a static electricity removal structure passing box that is manufactured using cheap fibers having good electrical conductivity and paper dust does not adhere to the product. Further, when manufacturing the static electricity removal structure passing box, the waste treatment of the carbon fiber end loss can be effectively utilized or reused. Furthermore, by using basic materials of pulp fibers, carbon fibers, and thermoplastic polymer fibers, it is possible to provide a static elimination structure passing box having a structure suitable for molding (manufacturing) at low cost.
[0031]
According to a fifth aspect of the present invention, there is provided a processing box or a processing box for a plastic processing product or the like having a structure in which the room for the processing product or the plastic processing product or the like formed in the box according to the fourth aspect is an electrostatic elimination chamber. is there. Therefore, it is possible to provide a static elimination structure passing box that is manufactured using inexpensive fibers having good electrical conductivity and having a room with a structure in which paper dust does not adhere to the product. Moreover, when manufacturing the static electricity removal structure passing box, there is an advantage that the waste material treatment of the carbon fiber end loss can be effectively used or reused. In addition, using a basic material of pulp fiber, carbon fiber, and thermoplastic polymer fiber, the static electricity removal structure is equipped with a room that is low in cost and has a structure that prevents paper dust with a structure suitable for molding (manufacturing) from adhering to the product. Can provide a pass-through box.
[Brief description of the drawings]
FIG. 1 is a flowchart showing an example of a manufacturing process of a static electricity removal structure and a static electricity removal structure passing box of the present invention. FIG. 2 is a perspective view showing an example of the static electricity removal structure of the present invention. FIG. 4 is an enlarged side view showing an example of still another static electricity removing structure of the present invention. FIG. 5 shows an example of another static electricity removing structure of the present invention. FIG. 6 is a side view showing an example of another static electricity removal structure molded article of the present invention. FIG. 7 is a partially cutaway perspective view showing an example of another static electricity removal structure passing box of the present invention. FIG. 8 is a perspective view showing an example in which the lid of FIG. 7 is opened. FIG. 9 is a front view showing an example in which the static electricity removing structure of the present invention is provided on clothes. Sectional view showing an example of a box [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Conductive sheet 1a Pulp fiber 1b Carbon fiber 1c Thermoplastic polymer fiber 2 Core material 3 Static electricity removal structure 30 Static electricity removal structure product 4 Passing box

Claims (5)

Pulp fiber, carbon fiber, and thermoplastic polymer fiber are mixed to produce a mud-like pulp material. This pulp material is produced by means such as sheeting and paper making, and carbon fiber is mixed in the pulp fiber. The resulting conductive sheet is dried after the production, and is subjected to a paper dust prevention treatment in which a water-soluble emulsion agent is added to the pulp material which has been made muddy using moisture as a medium by any of spraying, filling and coating methods. A conductive sheet made by performing,
A static electricity removing structure in which this conductive sheet is provided on at least one surface of a core material. The static electricity removal structure of the structure which used the pulp fiber of Claim 1, carbon fiber, and thermoplastic polymer fiber as the following compounding ratio.
Mixing ratio,
100 parts by weight of pulp fiber, 1-20 parts by weight of carbon fiber, 0-20 parts by weight of thermoplastic polymer fiber   A static electricity removing structure having a configuration using thermal processing in which the extension according to claim 1 is configured to perform processing such as papermaking, roll molding, press molding, or molding.   Pulp fiber, carbon fiber, and thermoplastic polymer fiber are mixed to produce a mud-like pulp material. This pulp material is produced by means such as sheeting and paper making, and carbon fiber is mixed in the pulp fiber. The static electricity removing structure provided with the conductive sheet having the above structure on at least one surface of the core material, and at least the partition part or the bottom part and the side part or the lid of the box formed by the static electricity removing structure. Processing box for processed products or plastic processed products.   A processed product or plastic processed product pass box having a static electricity removal chamber as a processed product or plastic processed product room formed in the pass box according to claim 4.

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