JPS59103603A - Production of conductive foots - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention The present invention provides conductive boots that can prevent electrical hazards such as explosion accidents caused by the behavior of static electricity, production failures due to damage to electronic parts, and electric shock accidents caused by dynamic electricity. Regarding the manufacturing method.

It is generally known that in order to prevent these problems, it is sufficient to use a conductive material with an appropriate electrical resistance value in the sole of the shoe, and to maintain electrical continuity between the sole and the wearer's foot. ing. In particular, for static electricity hazards, the electric resistance value should be lowered, and for electrostatic hazards, the current value should be below the allowable current pupil to prevent static electricity from accumulating. The electrical resistance value is set so that The prior art λ for manufacturing conductive shoes based on these findings uses, for example, an insole fabric with holes made, the shoe covering material is sewn together with the insole fabric, and this is made into a last material. There was a method in which the conductive material for forming the sole was injected by suspending the shoe into the shoe, covering it with side and bottom molds, and exposing the conductive material from the hole in the midsole. However, although this type of shoemaking technology can be used to manufacture short shoes, there are problems when it comes to manufacturing rain boots, and it cannot be applied horizontally. The problem was that the stitching between the elastic lining fabric, such as stockinette or tricot, which is preferred when manufacturing and wearing boots, and the insole fabric of the above-mentioned structure was wrinkled and did not work as expected. The problem is that the sewn part of the lining fabric tears when it is sunk in.

The present invention has been made to solve these problems, and is intended for workplaces that dislike static electricity, workplaces that dislike static electricity and desire to be safe from dynamic electricity, etc. An object of the present invention is to provide an extremely efficient method for manufacturing conductive boots suitable for wearing at home.

The gist of the present invention is to provide an insole in which a conductive sheet-like lower base material is provided on one side of a sheet-like upper base material having a cutout portion penetrating through the thickness direction, and a bag-like lining fabric having elasticity as the last.
Covering the inner sole so that it is located between the last and the lining fabric and the sheet-like upper base material of the inner sole faces the last side,
The coated last is then covered with an outer mold to form a desired space between the last and the outer mold, and then an injection molding material is poured into the space so that at least a portion of the sole of the space exhibits a desired electrical resistance value. A method of manufacturing conductive boots by injection molding.

The sheet-like upper base material, which is one of the components of the insole used in the present invention, may include fabric materials such as woven fabrics and non-woven fabrics that have holes or cutouts that penetrate through the thickness. A material impregnated or coated with synthetic resin, a synthetic resin sheet, etc. can be used. The other conductive sheet-like lower base material is
Synthetic resin sheets that are compatible with injection molding materials using conductive synthetic resins, etc., circular knitted woven fabrics made conductive by applying conductive ink, etc., or conductive threads, etc. can be used. Further, as the stretchable bag-like lining fabric used in the present invention, knitted fabrics such as woven fabrics made of tricot, knitted fabric, and spun yarn can be used.

The manufacturing method of the present invention will be explained step by step below.

First, the inner sole, which is made by laminating and integrating the sheet-like upper base material and conductive ink of the above structure with an adhesive, etc., is attached to the inner bottom of the elastic lining fabric, which has been made into a bag-like shape by sewing or the like, with an adhesive, etc. This can be hung from the last so that the inner sole is located between the last and the lining fabric to cover it, or the inner sole can be temporarily hung on a hanging device such as a pin installed at the bottom of the last. After that, the bag-like lining fabric is hung and covered, and the last is covered with the inner sole and the lining fabric. At this time, the sheet-like upper base material of the insole must be on the last side.

In particular, when using the latter covering method, the positioning of the insole during covering is reliable, the hanging of the lining fabric is smooth, and furthermore, there is no need for an adhesive process between the insole and the lining fabric. It is superior in terms of product quality and work process compared to conventional coating methods.

Next, this coated last is covered with an outer mold, and a molding space for the torso, lace, sole, etc. is formed between the last and the outer mold. Next, an injection molding material such as rubber or synthetic resin is injected into this space, and at least the sole of the shoe is injected with a conductive injection molding material having a desired electrical resistance value. A plurality of injection molding materials are combined and injected to form a multilayer structure to exhibit a desired electrical resistance value.

As an example of this conductive injection molding material, plasticizers (phthalic acid-based secondary plasticizers, alkylbenzene-based secondary plasticizers, adipic acid-based polymeric plasticizers, etc.) may be used singly or in mixtures based on 100 parts by weight of polyvinyl chloride resin. ) 0 to 130 parts by weight, 0.1 to 10 parts by weight of antistatic agents (cationic, anionic, nonionic surfactants, and combinations thereof), and appropriate amounts of stabilizers, lubricants, pigments, etc. Examples include formulations in which:

Due to this injection, the parts of the lining fabric that are not in contact with the insole, such as the torso and the laces, are exposed to the back of the lining fabric. Because the injection molding material is located so close to the lining fabric, the injection molding material infiltrates into the lining fabric, but hardly ever penetrates to the inner surface of the lining fabric.
This allows for integration with the lining fabric while ensuring the quality of appearance and feel of this part. On the other hand, in the part of the lining fabric that is in contact with the inner sole, because the last is not located immediately behind the lining fabric and the inner sole is located, the injection molding material passes through the lining fabric and is applied to the conductive sheet-like lower base material. reach If this conductive sheet-like lower base material does not have any voids on the surface or inside that allow injection molding material to infiltrate, such as a synthetic resin sheet, it will be joined at this boundary, and it will be bonded like a cloth material. If it has voids, the injection molding material will penetrate and, depending on the selection of the sheet-like upper base material, will further penetrate into the upper base material, thereby integrating the sole, lining cloth, and midsole. Also, this injection pressure
The conductive sheet-like lower base material located under the defective part of the sheet-like upper base material is pushed up to the surface of the sheet-like upper base material, so that the conductive sheet-like lower base material alone or the conductive sheet-like lower base material is placed on the surface of the upper base material. The sheet-like lower substrate and injection molding material are exposed. This ensures electrical continuity between the sole and the wearer's foot.

Furthermore, since the conductive sheet-like lower base material in the present invention is located on the upper surface of the sole, it plays a role as an upper electrode.
This makes it possible to reliably utilize the electrical resistance value set in the sole of the shoe.

As described above, according to the present invention, conductive boots that can prevent problems caused by static electricity and electrodynamics can be efficiently manufactured in a simple process while ensuring sufficient conductive performance.

Examples are shown below.

Example 1 (See Figure 1) A sheet-like upper base material (1
) A hole with a diameter of 10 m was made in the thickness direction in the stepping part and the heel part, and carbon ink, which is a conductive sheet-like lower base material (2) cut in the same way, was applied to both sides of the hole (application amount). 200 f/m") L, conductive cheesecloth (thread grain: No. 10, number of threads: 15 in length and width: 15 strands/1 nch) was hot-melted in the middle sole (3), and the bottom of the last (4) bottle ( 5) Temporarily hang the sheet-like upper base material (1) so that it is facing the last (→ measurement).Next, hang the stockinette lining fabric (6) sewn into a bag shape and use the outer mold (7). This was covered to form molding spaces for the trunk (8), the laces (9), and the sole (b).Next, an injection molding material ACLI having the following composition was injected into the spaces and molded.

Injection molding material A Polyvinyl chloride resin 100 parts by weight DOP
(dioctyl phthalate) 40DBP
(Dibutyl phthalate) 55 Adipic acid polyester plasticizer 4° Stabilizer (
Organic tin mercapto group) Top 6 Lubricant (calcium stearate) 0.4 Calcium carbonate
LO antistatic agent (cationic/nonionic) LO pigment (anatase type titanium oxide)
h.

The boots obtained in this way are: flB-T-8103
When the electrical resistance value was measured based on the test method in 6.1.2, it showed a value of 90 MΩ to 2 MΩ in the temperature range of 5°C to 35°C, and the electrical characteristics were consistent with the intended workplace. .

Example 2 (See Figure 2) Using the same sheet-like upper base material (1) and lower base material (2) as in Example 1, the bag-like inner sole (3) and bag-like lining fabric (6) were used. The inner sole (3) is attached to the inner bottom of the shaped lining fabric (6) via urethane adhesive, and this is hung onto the last (4) which has the small protrusion housing → on the outer surface of the lace, and then a steel plate is attached. After fitting the protector (G), it is covered with an outer mold (7) to form a molding space for the trunk (8), the laces (9), and the sole (E).

Next, injection molding material B (2) having the following composition is placed in this space.
) was injected and molded.

Injection molding material B Part by weight Polyvinyl chloride resin 100 DOP (Dioctyl phthalate) 50 Adipic acid polyester plasticizer 6° Stabilizer (Organic tin mercapto type)
15 Lubricant (calcium stearate) 0.4 Antistatic agent (cationic/nonionic) 0.5 Pigment (anatase type titanium oxide) 3.0 The boots thus obtained are J-K5-T.
The electrical resistance value was measured based on the test method in 6.12 of -8103 and was 95MΩ in the temperature range of 5℃ to 35℃.
It showed a value of ~3 MΩ, and had electrical characteristics that matched the intended workplace.

Example 3 (See Figure 3) Using the same sheet-like upper base material (1), lower base material (2), inner sole (3) and bag-like lining cloth (6) as in Example 1, Example 2 strokes using the same method as 1 (→ insert the inner sole (3) and the bag-like lining fabric (
6) Cover. Next, cover it with the first outer mold (b), including the torso (8), the laces (9), and the upper thin sole (
b) Form a molding space. Next, Example 2 is placed in Jin's space.
Inject the injection molding material B (b) used in . Next, after releasing the first mold (b), a molding space for the lower sole portion 11) is formed by the covering of the second outer mold ) was injected and molded.

The electrical resistance of the boots obtained in this way was measured based on the test method in 6.1.2 of J-T-8103 and showed a value of 90MΩ to 3MΩ in the temperature range of 5℃ to 35℃. The electrical characteristics were suitable for the workplace.

[Brief explanation of drawings]

FIG. 1, FIG. 2, and FIG. 3 are explanatory diagrams each showing an embodiment of the present invention lying on its side. 1... Sheet-like upper base material 2... Conductive sheet-like lower base material 3... Middle sole 4... Last 6...
...Lining cloth '/, 13.20...・Outer mold 1
1, 12... Procedural Amendment for Injection Molding Materials 1937 Fi Ij 211270 Kazuo Wakasugi, Commissioner of the Patent Office 2 Name of the invention Method for manufacturing conductive rain boots 3 Relationship with the person making the amendment Case Applicant (Mb160) Tokyo 22-5 Daikyomachi, Shinjuku-ku, Date of amendment 5. Subject of amendment (1) "Detailed explanation of the invention" column of the specification (1) Page 10, line 18 to 11 of the specification The sentence "Next, the first outer mold □ card (13)..." on the fifth line of the page is corrected as follows. "Next trap side mold (22) and bottom mold (23)
) is covered with an outer mold (13) consisting of a body (8
), the upper thin layer sole (1) is formed into a molding space. Next, injection molding material B (12) f used in Example 2 is injected into this space. Next, the bottom mold (12) of this outer mold is injected. 23) is released and another outer mold, the bottom mold (20), is set to form a molding space for the lower sole (21), and the injection molding material A (11) used in Example 1 is filled in this space. (2) Figure 3 of the drawing is corrected as shown in the attached sheet.

Claims (1)

[Scope of Claims] L An insole in which a conductive sheet-like lower base material is provided on one side of a sheet-like upper base material that penetrates in the thickness direction and has nine defects, and a bag-like lining fabric that has elasticity as the last. , the insole is positioned between the last and the lining cloth, and the sheet-like upper base material of the insole is facing the last side, and then the covered last is covered with an outer mold, A method for manufacturing conductive boots, comprising forming a desired space between the last and the outer mold, and then injecting an injection molding material into the space so that at least a sole portion of the space exhibits a desired electrical resistance value. λ The method for manufacturing conductive boots as claimed in claim 1, wherein the insole is temporarily attached to the last and then covered with a lining fabric.