JPH0316121B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing work footwear that is worn when walking on a floor coated with an adhesive or adhesive.

BACKGROUND ART Recently, in water spraying and other construction work, there has been an increase in the amount of work that involves applying highly adhesive adhesives to floor surfaces. In order to obtain footwear suitable for walking on floors coated with adhesive materials in such work, the bottom forming part of the footwear is made of silicone rubber or fluorine resin, etc., which has adhesive properties to adhesive materials. However, when bonding these adhesive substances themselves to the footwear body, there is a problem in that bonding is nearly impossible due to their original nature.

As an invention designed to solve this problem, JP-A-57-
No. 22704 is mentioned. This invention is characterized by impregnating a base material made of felt or long-fiber raised woven fabric with liquid rubber or resin, one side serving as a footwear sole-forming layer, and the other side serving as a joint to the footwear body. However, since the work was difficult, manufacturing efficiency was low and costs were high, and there were also problems in that it was impossible to produce products of uniform quality.

The invention of the present application has been completed through research from these viewpoints, and includes inserting a sock-shaped lining fabric into a shoe mold, and adding a paste of uncured rubber or paste that exhibits non-adhesive properties to the adhesive surface after solidification to the bottom of the shoe mold. A thin layer of resin is applied, soaked in and heated to form a semi-cured film, and then the same type of uncured rubber or resin is applied on top of the semi-cured film.
For work with a rubber or resin bottom that exhibits adhesion to the adhesive surface after solidification, characterized by applying to a thickness not exceeding 1.0 mm and heating to a semi-cured state by repeating the desired number of rotations. It is a method of manufacturing footwear.

In the present invention, a sock-shaped lining fabric is inserted into a shoe mold, and the sock-shaped lining fabric is defined as
Preferably, a well-known knitted or woven fabric such as knitted or tricot fabric is used, and the fibers constituting this knitted or woven fabric may be of any type. This knitted fabric or the like is knitted or woven in advance into a sock shape, or cut into a predetermined shoe shape and sewn to form the sock-like lining fabric of the present invention.

In the present invention, the paste-like uncured rubber or resin that exhibits non-adhesion to the adhesive surface after solidification refers to
For example, silicone rubber, fluorine rubber, or fluorine resin may be used, and these rubbers or resins are mixed with an appropriate curing agent and used in the form of a paste.
Its pasty clay is 50000~200000 cp (25
℃) is preferred. If the clay exceeds 200,000 cp, there will be a disadvantage that it will not stick to the coating sufficiently, and the coating will be difficult to layer evenly, resulting in unevenness. If the clay is less than 50,000 cp, it will not be possible to form the desired thickness. Therefore, the problem arises that it is difficult to reach the destination.

In the present invention, first, a paste-like unsolidified rubber or resin is applied thinly to the bottom surface of the backing cloth, and is soaked in and heated to form a semi-cured film. It is desirable that the amount of the paste applied is at least enough to uniformly wet the entire bottom surface of the undersock. There are no particular restrictions on the heating conditions when heating this applied paste, but
Practically speaking, conditions can be selectively determined as appropriate within the range of 40°C to 100°C. It is important to limit the degree of heating to such a level that the paste forms a semi-cured film. If curing is completed at this point, care must be taken because adhesion between the layers will not be achieved when the next applied uncured film is heated and cured.

In the present invention, the same type of uncured rubber or resin is coated on the semi-cured film described above to a thickness of about 0.5 mm to 1.0 mm and heated to a semi-cured state.
Here, the same type of uncured rubber or resin means that the same paste as described above may be used, or a paste prepared by slightly changing the composition may be used. At this time, if the thickness of the coating exceeds 1.0 mm,
Since the film thickness will drop and the thickness will become uneven, it is necessary to keep the thickness within 1.0 mm. 0.5mm
Preferably, the thickness is within the range of 0.8 mm.

In the present invention, the above-described coating and curing operations are repeated an arbitrary number of times. Here, the term "arbitrary number of times" means that the number of times can be freely selected depending on the desired thickness of the bottom of the strip material. For general practical purposes, about 4 to 5 times is preferable.

The configuration of the present invention has been explained above. Conventionally, the sole was made of cloth lining, and a paste-like rubber etc. was applied to it.
It is known to obtain strip material by impregnating it, but
Since the rubber, resin, etc. used in the prior art originally have good adhesive properties, the paste oozes out to the inside of the sock because it adheres to the shoe mold, making it difficult to peel off after application. Otherwise, it will stain the surface of the shoe mold and significantly slow down the work. Therefore, it is impossible to lower the viscosity of the paste, and if you increase the viscosity by removing it, the resulting coating film will deteriorate. However, it is difficult to form a uniform film thickness, and therefore, in practice, it is almost impossible to manufacture a strip by such dipping. The present invention focuses on the special properties of paste-like unsolidified rubber or resin that exhibits non-adhesive properties after solidifying, and as a result of research and prototype production, it has been found that penetration of the low-viscosity paste into the inner surface of the sock, adhesion to the shoe mold, and The present invention was completed by unexpectedly discovering that no staining phenomenon occurs and that recoating is effective when the paste is in a semi-cured state.

As described above, when using the footwear manufacturing method of the present invention, not only the intended work footwear can be obtained extremely easily, but also the obtained product is light, homogeneous, and of satisfactory quality. This has been recognized as having a significant effect.

Examples of the present invention will be described below.

〔Example〕

TSE 3402 RTV (Silicone rubber manufactured by Toshiba Corporation) 100g TSE 3402 RTV(B) (Hardening agent for silicone rubber manufactured by Toshiba Corporation) 10g The above two components are mixed to form a paste. The curing speed of this paste is 12 hours at 20℃ and 20 hours at 70℃.
It was a value of minutes. Also, the viscosity is 150000cp (25
℃), use a brush to apply a thin layer of the above paste (coating amount: 60gr/foot; size 25.0) to the bottom of stockinette (cotton/polyester blend; commercially available product) socks that have been placed in an aluminum shoe mold in advance. A semi-cured film was formed by heating in an oven at .degree. C. for 5 minutes. Next,
The same paste was uniformly applied thereon to a thickness of 0.5 mm to 0.8 mm (coating amount: 40 gr/foot; 25.0 size), and the oven temperature was raised to 60° C. and heated for 5 minutes to form a semi-cured film. Next, paste the same paste again on top of it 0.5
It was applied uniformly to a thickness of mm to 0.8 mm (coating amount: 30 gr/feet; size 25.0), and the oven temperature was further raised to 70° C. and heated for 5 minutes. Then add 0.5mm of the same paste again.
~0.8mm thickness (application amount 30gr/foot; 25.0 size)
It was applied evenly and heated at 75°C for 15 minutes to complete curing, yielding light work footwear with integrated socks.

Claims (1)

[Claims] 1 A sock-shaped lining fabric is placed in a shoe mold, and a thin layer of paste-like uncured rubber or resin that exhibits non-adhesion to the adhesive surface after solidification is applied to the bottom of the shoe mold, soaked in, and heated to form a semi-cured film. Adhesion after solidification, characterized by applying the same type of unsolidified rubber or resin on the semi-cured film to a thickness not exceeding 1.0 mm and heating it to a semi-cured state, which is repeated an arbitrary number of times. A method of manufacturing work footwear having a rubber or resin sole that exhibits adhesion to surfaces.