JPH0751332B2 - Waterproof shoe manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an improvement in a method for manufacturing waterproof shoes, particularly men's shoes and golf shoes, having waterproof property.

(Prior Art) Conventionally, in order to prevent water from invading from seams or other joints of the instep member when worn in rainy weather such as men's shoes and golf shoes, It is known that a waterproof material is bonded to the back surface. That is, in these conventional shoes, particularly in the method of manufacturing a shoe called cement method, as shown in FIG. 6, first, a backing material 4 lined with a waterproof material 3 is sewn in a bag shape, After adhering to the material 2, at least a step of suspending twice using the last 7 was required in order to form the shoe shape. Further, since it is sewn into a bag shape, it is necessary to three-dimensionally cut the instep backing material 4, which is also a factor that the yield of the instep backing material 4 is poor and the manufacturing cost is increased.

In addition, even if the same cement method is used, it is also possible to bond the instep backing 4 lined with the waterproof material 3 as shown in FIG. However, there were the following problems to be solved.

(Issues to be solved by the consideration) That is, like the former case, a sewn bag-like backing material lined with a waterproof material has a good waterproof effect, but it is sewn in a bag shape at the time of manufacturing. As mentioned above, when bonding the instep material and the instep backing material, it is necessary to first hang the instep backing material on the last, and further, to make a shoe shape. When changing the last to another,
There is a problem in that a step of suspending it in the last is required again, which requires a great deal of time and labor in the process and also increases the cost.

On the other hand, in the latter case, the insole backing lined with a waterproof material is joined to the insole and then hung on the last to make it into a shoe shape. Target. However, as shown in FIG. 7, since a space is formed in the shoe sole contact portion formed between the hanging allowance and the insole, it penetrates from the seam of the sewing portion formed on the upper member. The water that has traveled travels on the outside of the waterproof material, seeps out from the end of the instep member located at the aforementioned shoe sole abutting part, and soaks into the insole from the void, or the adhesion between the shoe sole and the instep member. It had the drawback of penetrating from the surface and impairing waterproofness.

Therefore, it has been desired to establish a manufacturing method in which men's shoes, golf shoes, and the like, which have low manufacturing costs and good waterproofness, are supplied.

(Means for Solving the Problems) In view of these conventional drawbacks, the present invention relates to an improvement in a method for manufacturing men's shoes, golf shoes, and other waterproof shoes that require waterproofness, which reduces manufacturing costs. In addition, the purpose of the invention is to provide a shoe having good waterproof property.

That is, as in the case of men's shoes, golf shoes, and mountain climbing shoes, the upper member is made of a waterproof material and the shoe sole is joined to produce a waterproof shoe. The instep member made of the insole backing material and the like is suspended in the last together with the insole, and separately mixed into the recess of the shoe sole contact portion formed by the end of the suspending margin of the instep member and the insole. A vinyl chloride resin sol solution prepared by appropriately blending a plasticizer and a stabilizer with the vinyl chloride resin prepared above is filled or applied, and then heated by a far infrared heater or any other heat source. The sol solution made from the sol state to the semi-gelled state,
By further gelling, a sealing portion is formed around the recess of the shoe sole contact portion and the hanging portion, and the shoe sole is joined and integrated with an adhesive or the like to produce a waterproof shoe. This is a method for manufacturing waterproof shoes.

(Operation) As described above, in the men's shoes, golf shoes, etc. of the present invention, there is no need to sew a backing material lined with a waterproof material into a bag like a conventional waterproof shoe. In order to join the points and the backing material sewn in a bag shape with the backing material, first hang the backing material on the last, then change the last,
Unlike the point that the suspending process was required twice, such as arranging the insole, joining it with the instep material, and hanging it again to fit it together, it was lined with a waterproof material in the suspending process. The upper shape of the shoe is formed by suspending the insole member and the insole formed by joining the insole backing material and the insole material, and suspending the shoe. However, this point is well known in the art. A feature of the present invention is that the portion corresponding to the end portion of the instep member including the concave portion of the shoe sole contact portion formed by the both ends of the instep member and the insole in the hanging step is impregnated with After filling or applying a good vinyl chloride resin sol solution,
This is because a sealing portion having adhesiveness and flexibility by being gelated by heating, good bending resistance against repeated bending stress due to covering the shoe, and having elasticity is formed.

By covering with the sealing part in this way, unlike the conventional method, it is not necessary to sew a backing material lined with a waterproof material in a bag shape, and in the conventional shoes, water that has entered through the seam of the instep member However, there occurs a phenomenon that it exudes from the end of the instep member located in the hanging part of the instep member, but in the present invention, it also occurs at the end of the instep member when the sealing part is formed. Since the sealing part is formed by gelling after the vinyl chloride resin sol solution has spread, it prevents the phenomenon of water seeping out and also covers the middle bottom part with the sealing part. , The waterproof effect is further improved.

Further, in the present invention, since the shoe sole contact portion is covered with the sealing portion, when the shoe sole body is adhered, the shoe sole body is not a concave portion like a conventional shoe but is substantially flat. Therefore, the adhesion area can be widened, the adhesion between the instep member and the sole body becomes good, and a durable shoe can be supplied.

(Embodiment) An embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 1 to 4, it is manufactured by joining an instep member using a waterproof material and a shoe sole. In a method for manufacturing waterproof shoes 1 such as men's shoes and golf shoes, an instep member 5 made of an instep backing material 4 and an instep covering material 4 joined to an insole 6 is hung on a last 7 together with an insole 6. The hanging margin 5a of the instep member 5
8a of the shoe sole contact portion 8 formed by the end 5b of the shoe and the insole 6
Is filled or coated with a separately prepared vinyl chloride resin sol solution 9 and then heated with a far infrared heater 11 or any other heat source to change the vinyl chloride resin sol solution from a sol state to a semi-gelled state. To produce a waterproof shoe by forming a sealing portion 10 around the recess 8a of the shoe sole contact portion 8 and the hanging margin 5a by gelling, and further joining and integrating the shoe sole. The method for manufacturing the waterproof shoe 1 is characterized by the following.

The vinyl chloride resin sol solution used in the method for producing waterproof shoes according to the present invention preferably has the following compounding ratio.

That is, the weight distribution of vinyl chloride resin: plasticizer: stabilizer is 100 parts: 60 parts: 2 to 3 parts, respectively.

In addition, the degree of polymerization of vinyl chloride resin at that time is about 1200 to 1700 in the form of a copolymer or about 1100 to 1700 in the form of a homopolymer because the gelation temperature is relatively low, so the working process This is preferable in reducing the influence on the instep member due to heating or heating. As the plasticizer, it is desirable to use dioctyl phthalate (DOP), dibutyl phthalate (DBP), and other plasticizers for vinyl chloride resin. As the stabilizer, those which can be used for soft vinyl chloride resin are desirable.

The vinyl chloride resin sol solution is a mixture of a vinyl chloride resin (vinyl chloride paste) with a plasticizer and a stabilizer, and behaves as shown in FIG.

That is, initially, the surfaces of the vinyl chloride resin particles are slightly solvated with a plasticizer by heating, but the particles move freely with respect to each other and have fluidity as a viscous sol. Then, the viscosity of the plasticizer and the like is reduced by heating, and the expansion of the vinyl chloride resin particles progresses considerably, the particles melt loosely in the surface layer and solidify, and the fluidity is gradually lost, The central part of the particles is not gelled, and is in a semi-gelled state with poor physical strength as a gel. Furthermore, as the temperature rises due to heating, the entire vinyl chloride resin particles completely melt to the core and flow at the same time as the gelation and expansion, and the solvated vinyl chloride resin molecules undergo vigorous micro-Brownian motion to cause inter-particle The entanglement between the molecules of becomes stronger and the physical strength reaches the maximum, and the sealing part is formed. As described above, in the present invention, the vinyl chloride resin sol solution is 65 ° C to 100 ° C.
It is desirable to use a gel that gels at around ° C.

In the method for manufacturing waterproof shoes according to the present invention, the end portion of the hanging margin of the instep member is cut by cutting the instep material and the instep backing material together as shown in FIGS. 1 and 2. It is also possible to fill or apply the vinyl chloride resin sol solution after making the end faces flush.

(Effects of the Invention) Due to the above-mentioned configuration, in the method for manufacturing waterproof shoes such as men's shoes and golf shoes of the present invention, a bag with a backing material lined with a waterproof material like a conventional shoe is used. Since it does not need to be sewn into a shape, it is not necessary to hang it at least twice using the last, and unlike the conventional bag-like sewing method for backing material, it is not necessary to cut three-dimensionally, so the yield is high. Since it is possible to prevent a decrease in production cost, the production cost can be reduced.

Furthermore, unlike the conventional shoe which is not in the form of a bag, it is lined with a waterproof material because a sealing part is formed at the part corresponding to the sole contact part and the part where the instep member is suspended. Water that has penetrated from the seam of the insole backing material that seeps out from the end of the instep member of the hanging part and impairs the waterproof property, and it is extremely waterproof Is. As the waterproof material used for the instep member according to the present invention, in addition to the material having only waterproof property,
It is also possible to use a material having waterproof and breathable properties.

Further, the present invention can be used not only for men's cave and golf shoes, but also for manufacturing walking shoes, general casual shoes, women's shoes, mountaineering shoes, and other waterproof shoes requiring waterproofness.

As described above, the present invention has the effect of making it possible to make shoes with extremely good waterproofness at low cost.

[Brief description of drawings]

1 to 2 are sectional views of essential parts of a waterproof shoe showing respective steps involved in the method for manufacturing a waterproof shoe of the present invention, and FIG. 3 shows a sealing portion related to the method of manufacturing a waterproof shoe of the present invention. 4 is a plan view of the protective shoe shown in FIG. 4, FIG. 4 is a cross-sectional view of essential parts of a waterproof shoe showing another embodiment relating to the method for manufacturing a waterproof shoe of the present invention, and FIG. Graphs showing gelation characteristics of vinyl chloride resin sol solutions, FIGS. 6 to 7
The figure is a cross-sectional view of a main part of a conventionally known waterproof shoe. 1: waterproof shoes, 2: instep material, 3: waterproof material, 4: instep backing material, 5: instep material, 5a: hanging, 5b: end, 6: insole, 7: last, 8: Sole contact part, 8a: Recessed part, 9: Vinyl chloride resin sol solution, 10: Sealing part, 11: Far infrared heater.

Claims (2)

[Claims] 1. A method for producing a men's shoe, a golf shoe or the like, which is produced by joining an instep member made of a waterproof material and a shoe sole, and an instep backing material obtained by joining the instep material and the waterproof material. Made of vinyl chloride resin separately prepared in the recess of the shoe abutment portion formed by the end of the hanging margin of the instep member and the insole. By filling or applying a sol solution, and then heating it with a far infrared heater or any other heat source, the sol state goes into a semi-gelled state and then gelled, so that the recess and suspension of the shoe sole contact portion A method of manufacturing a waterproof shoe, which comprises producing a waterproof shoe by forming a sealing portion around the margin and further joining and integrating the shoe sole. 2. The composition of the vinyl chloride resin sol solution is as follows:
Vinyl chloride resin: Plasticizer: Stabilizer as weight distribution
The method for producing waterproof shoes according to claim 1, wherein 100 parts: 60 parts: 2 to 3 parts.