JPH0957874A - Manufacture of slush molded shoe made of multilayer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing a film along the bottom of a shoe without discharging ungelatinized plastisol of plastisol for the bottom in a multilayer slush molded shoe formed of different materials at the bottom and the body of the shoe. SOLUTION: Plastisol 3 for the bottom 2 of a shoe of necessary amount or more necessary for molding the bottom 2 is cast in a mold 1. The mold 1 is heated to form a semi-gelatinized layer 4 except ungelatinized plastisol 5. Plastisol 6 for the body of the shoe is cast in the remaining plastisol 5, and a shoe body 8 is slush molded. Thus, even if an uneven part exists at the bottom of the shoe, the layer 4 can be stuck with the excess plastisol of the bottom of the shoe. The concentration is altered to the part of only the plastisol 6 for the body 8 gradually from the bottom 2 of the sue by the mixed part 7 of the two plastisols, a semi-gelatinized layer 11 of the body 8 of the shoe is formed via a mixed semi-gelatinized layer 10. Thus, the functions of the bottom 2 and the body 8 of the shoe can be gradually altered or clearly distinguished from one another.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a slush-molded shoe having a multilayer structure, in which the sole portion of the shoe body and the other portion of the shoe body are slush-molded with plastisol mixed with different polyvinyl chloride resins. In addition, it is possible to mold along the sole without discharging the ungelled plastisol for the sole.

[0002]

2. Description of the Related Art To manufacture shoes by slush molding made of polyvinyl chloride resin, a slash molding mold having the same recess as the outer shape of the shoe is manufactured by electroforming, and polyvinyl chloride resin is poured into this mold. After forming a semi-gelled film of a certain thickness on the inner surface by heating for a short time, the extra polyvinyl chloride resin that has not been gelled is discharged out of the slush molding mold and heated as a whole,
The semi-gelled film is completely solidified to obtain a skin to be a shoe body, which is cooled and demolded.

Parts such as a back cloth (inner boot), an insole, and a fastener are sewn and adhered to the inside of the slush-molded skin in this manner, and further painting is carried out to complete a slush-molded shoe as a final product.

In the slush-molded shoe in this manner, the design of the inner surface of the slush-molding mold and the like are reproduced as they are, and at the same time, the sole of the shoe body (hereinafter referred to simply as the sole) and the sole of the shoe body. Other parts (hereinafter,
In the slush molding process, the shoe body is simply molded together with the part that is molded on the sole of the shoe), and there is no seam or the like to provide a complete waterproof / moisture-proof function. It was used for manufacturing, but recently, due to the diversification of designs, many shoe types (short boots) are being developed.

In such diversified slush-molded shoes, it is not enough to have a waterproof / moisture-proof function by integrally molding the shoe sole and the shoe main body, and various functions are required. The functions required as a shoe body are different,
The sole of the shoe is required to have a certain degree of hardness and abrasion resistance, and the main body of the shoe is required to have flexibility and the like.

For this reason, conventionally, the shoe sole and the shoe body have been made to have a multi-layered structure such as two layers of different materials, and hardness, abrasion resistance, oil resistance, chemical resistance, etc. have also been given. ing.

As a method for molding the shoe sole and the shoe body of the conventional slush molding shoe into two layers, for example,
There is a method of molding footwear using plastisol disclosed in Japanese Patent Publication No. 40-13590, and as shown in the sectional structure applied to overshoes in FIG. 3, an outer mold (mold) 11 having the same recess as the outer shape of footwear is heated. Then, inject the vinyl resin plastisol into the bottom of the mold 11 to make the bottom 1 of the footwear.
After gelling No.2, vinyl resin plastisol was further injected to the required height by the usual slush molding method to form a layered gel on the inner surface of the mold 11 to the required thickness, and the excess ungelated plastisol was completely discharged. Layered gel layer 13
The two-layer slush molded shoe is manufactured by completely melting the above.

Further, in the method for producing oil-resistant shoes of Japanese Patent Publication No. 59-37963, although not shown, a large amount (50 to 100 parts) of an oil-resistant polymerizable polyester plasticizer for shoe soles is used in the shoe mold. A certain amount of plastisol A blended in was injected and semi-gelled under heating conditions so that the tread part has a width of 3 mm to 6 mm.
After forming an oil resistant bottom with a wall thickness of mm, inject and fill the outer layer plastisol B from above and heat until the desired wall thickness is attached, then discharge the ungelled plastisol to cause gelation. It is completed and then cooled and taken out.

Further, in the method for manufacturing a slush-molded shoe having multiple layers disclosed in Japanese Patent Laid-Open No. 56-70702, as shown in FIG. 4 which shows a sectional structure of the shoe after molding, a predetermined position inside the slush-molding mold 11 is shown. Polyvinyl chloride plastisol is injected up to and the semi-gelled layer 12 of an appropriate thickness is attached to the inner surface by heating, and the ungelled plastisol is discharged by vacuum suction, and then polychlorinated with a different color and physical properties from the bottom part 12. Plastisol is injected to a little above the upper end of the mouth opening forming part of the mold 11 by a normal slush molding method using vinyl plastisol, and the semi-gelated layer 13 having an appropriate thickness is formed by heating, and the ungelled plastisol is appropriately added. After being discharged by the method, the semi-gelated layers 12 and 13 attached to the inner surface by heating are completely gelled and molded.

Further, in the method of manufacturing a multilayer slush molding shoe disclosed in Japanese Patent Publication No. 58-35683, as shown in FIG. 5 showing a sectional state during molding, an openable / closable hole is formed on the bottom surface of the slush molding mold 11. 11a and 11b are provided, polyvinyl chloride plastisol is injected to a predetermined position so as not to stain the inner wall surface, and a semi-gelated layer 12 having an appropriate thickness is attached to the inner surface by heating, and the ungelled plastisol is placed on the bottom surface. After being discharged from the holes 11a, 11b of the mold 11, the plastisol is slightly advanced to the upper end of the mouth opening forming part of the mold 11 by a normal slush molding method using polyvinyl chloride plastisol having a color and physical properties different from those of the bottom part 12. After injecting and heating to form a semi-gelled layer with an appropriate thickness, the powdered plastisol is discharged by an appropriate method, and then heated to the inner surface. Adhere to that two half gelling layer 1
2 etc. are made to gel completely.

[0011]

According to these conventional methods for manufacturing a two-layer slush molded shoe, different materials are used for the shoe sole 12 and the other shoe body 13 (the sole 12 and the sole are different). It becomes two layers with the shoe body).

However, the first manufacturing method: (Japanese Patent Publication No. 40
-13590) and the second production method: (Japanese Patent Publication No. 59-59).
No. 37963), an amount of plastisol required for film formation on the sole of the shoe is injected and heated to cause semi-gelation. However, the plastisol increases in viscosity by heating and becomes a paste, and in general, shoes are used. The shape of the bottom is not flat,
For example, as shown in FIG. 3B, since the toe portion 16 and the stepless portion 17 are higher than the ground contact portions such as the heel 14 and the stepped portion 15, the mold 11 for molding the shoe sole 12 is formed.
The surface of the liquid plastisol injected into the inside is horizontal, and the thickness of the grounding parts such as the heel 14 and the stepped part 15 is large,
There is a problem that the high toe part 16 and the stepless part 17 become thin, and it is difficult to form a film with a uniform desired thickness.

Therefore, the third manufacturing method is as follows:
70702) and the fourth manufacturing method: (Japanese Patent Publication No. 58-
No. 35683), a slightly larger amount of plastisol than the plastisol required for molding the sole of the shoe is injected, and the semi-gelated layer is attached by heating, and then the excess plastisol is discharged by vacuum suction, Although it is necessary to remove the plug that closes the bottom hole to discharge the excess ungelled plastisol, a uniform semi-gelated layer can be formed on the inner surface of the mold, but the manufacturing process becomes complicated and The problem is that it is extremely inefficient.

The present invention has been made in view of the above-mentioned problems of the prior art. When manufacturing a multi-layered slush molded shoe with different material for the shoe sole and the shoe main body, plastisol for the shoe sole is injected to obtain gold. An object of the present invention is to provide a method for producing a slush-molded shoe having a multi-layer structure, in which a semi-gelled layer is formed in a mold, and the slush-molded shoe can be formed into a shape along the sole without discharging ungelled plastisol.

The present invention also provides a method for manufacturing a slush-molded shoe consisting of multiple layers capable of gradually changing the functions of the shoe sole and the shoe body, and clearly distinguishing the functions of the shoe sole and the shoe body. It is the one we are trying to provide.

Further, the present invention is intended to provide a method for producing a slush molded shoe having a multilayer structure which can impart strength, hardness, wear resistance, oil resistance, chemical resistance and the like to the sole of the shoe.

[0017]

A method for manufacturing a slush molded shoe having a multilayer structure according to claim 1 of the present invention, which achieves the above object, comprises a sole in which a polyvinyl chloride resin is mixed with the sole of a slush molding mold. After injecting more than the amount of the required plastisol required for the molding of the shoe sole, after heating the slush molding mold to leave the ungelled plastisol and deposit the semi-gelated layer along the shape of the shoe sole, Injecting a plastisol for the shoe body in which a polyvinyl chloride resin different from the plastisol for the shoe sole is injected and further heated, through a mixed semi-gelled layer in which the ungelled plastisol for the shoe sole and the plastisol for the shoe body are mixed. After the semi-gelated layer of the shoe body is formed, the ungelled plastisol is discharged and gelled by heating.

According to a second aspect of the present invention, in addition to the structure of the first aspect, the method for producing a slush-molded shoe having a multi-layer structure further comprises the injection amount of the plastisol for the sole and the residual ungelled plastisol for the sole. At least one of the amount of the modified plastisol and the film forming range and the mixing ratio of the mixed semi-gelated layer of the plastisol for the sole and the plastisol for the shoe main body are changed. is there.

Further, in the method for producing a multilayer slush molding shoe according to claim 3 of the present invention, a polyvinyl chloride resin to be injected into the sole of the slush molding mold is used in place of the structure according to claim 1 or 2. Plastisol mixed with a cross-linkable polyvinyl chloride resin, thermosetting plasticizer,
One of the three oil-resistant plasticizers, or a combination of two or more thereof, is characterized.

According to a fourth aspect of the present invention, in the method for producing a slush molded shoe having a multilayer structure, in addition to the structure of the third aspect, a polyvinyl chloride resin to be injected into the sole of the slush molding mold is mixed. The plastisol is characterized by being further mixed with an anti-slip material.

Here, the sole portion is a portion which can be projected on a horizontal surface when the shoe is placed on a horizontal surface in a normal use state, and a ground contact portion such as a heel portion or a tread portion and the like. Although it is composed of a toe part and a stepless part, it does not necessarily include all of these constituent parts, and a part such as a stepping part is the sole part here.

Therefore, the amount required for molding the shoe sole means that the shoe sole to be molded constitutes the heel portion, the stepping portion,
In the case of the toe part and the stepless part, it means the injection amount that can be molded by covering these parts.For example, the heel part which is the ground contact part to the ground etc. is put on separately as When only the attached portion is the sole portion to be formed, it means the injection amount that can be formed by covering only the stepped portion.

Further, the shoe body refers to a portion other than the shoe sole portion of the shoe, and in the slush molding process, the shoe body includes the portion formed to overlap the shoe sole portion.

Further, leaving the ungelled plastisol means leaving the ungelled plastisol in a state where a semi-gelled layer conforming to the shape is formed on the sole of the shoe, and the amount required for molding is determined. The amount varies depending on the amount of excess plastisol and the molding thickness of the semi-gelled layer.

Further, the mixed semi-gelated layer means a semi-gelled layer of a portion formed by mixing an ungelled plastisol for a shoe sole and a plastisol for a shoe body injected later, and the remaining ungelled plastisol is left. Depending on the amount of gelled plastisol, the range and mixing ratio of the mixed semi-gelated layer will change, and if the amount of remaining ungelled plastisol is minimized, the mixed semi-gelated layer will hardly be formed and the sole If the amount is large, the mixed semi-gelled layer is formed over a wide area, and the functions of the shoe sole and the shoe body are gradually changed.

[0026]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a method for manufacturing a slush molded shoe having multiple layers according to the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a process diagram in the case where the method for manufacturing a slush-molded shoe having multiple layers according to the present invention is applied to the manufacture of a two-layer slash-molded shoe.

(1) In this method for manufacturing a slush molded shoe, as a first step, as shown in FIG. 1 (a), the slush molding mold 1 (hereinafter simply referred to as mold 1) is attached to the shoe sole 2. A plastisol mixed with a polyvinyl chloride resin as the plastisol 3 for the shoe sole is injected in an amount more than that required for forming the shoe sole 2.

The shoe sole 2 to be molded here is the toe 2
a, the stepping part 2b, the stepless part 2c, and the heel part 2d are all included, and the injection amount of the plastisol 3 for the shoe sole is such that the film thickness of the shoe sole 2 is the highest part of the notch part 2c. Is the amount by which the plastisol 3 for the sole is injected beyond the height to which is added.

When the shoe sole 2 to be formed as described above requires a function required as a shoe sole, for example, abrasion resistance, the foot portion 2b and the heel portion 2 which are portions in contact with the ground.
Since it is sufficient that d has at least that function, mold 1
It is sufficient to fill the sole plastisol 3 beyond the height of the foot portion 2b and the heel portion 2d, which are low in height, by adding the film-forming thickness. In case of oil resistance required for walking, the toe portion 2a, the step portion 2b,
The function is required for the sole 2 including all of the stepped portion 2c and the heel portion 2d. Also, in the case of high heels,
It is also possible to bond the heel portion as a separate body and to bond the heel portion after completion of the molding. In this case, only the stepped portion 2b may be molded as the shoe sole 2.

As the plastisol 3 mixed with the polyvinyl chloride resin for the sole of the shoe, a general plastisol mixed with the polyvinyl chloride resin used in the production of slush molded shoes up to now is used. However, in addition to the functions required for the shoe sole 2 of the slush molded shoe, such as wear resistance, oil resistance, and hardness, the cost and the like are also taken into consideration.

For example, as a suitable compounding example, 100 parts by weight of polyvinyl chloride paste resin, 80 to 100 parts by weight of a plasticizer, and 3 to 5 parts by weight of a stabilizer can be used as plastisol.

As the plasticizer, in addition to phthalic acid ester type plasticizers such as DOP, adipic acid ester type, polyester type and epoxy type plasticizers can be used.

Examples of the stabilizer include tin laurate-based stabilizers such as diphtyltin dilaurate, tin malate-based stabilizers such as dibutyltin dimalate, tin mercapto-based stabilizers, and Ba.
It is possible to use each stabilizer such as a system, a Zn system, a Ca system and a complex thereof.

(2) Then, the injected sole plastisol 3 is semi-gelled on the shoe sole 2 of the mold 1 to be attached as the semi-gelled layer 4, and the shoe sole 2 of the mold 1 is heated.

The mold 1 of the plastisol 3 for shoe soles
When the injection amount into the sole 2 is very slightly larger than that of the sole 2 to be molded, the mold 1 is inclined at least once on one side of the toe 2a side or the heel 2d side or both sides. As a result, the semi-gelled layer 4 can be adhered and formed.

(3) By heating the mold 1 in this manner, the plastisol 3 for the shoe sole in a liquid state injected into the shoe sole 2 is increased in viscosity and semi-gelated to form a film around the mold 1. In the semi-gelling process of the shoe sole plastisol 3, the shoe sole plastisol 3 is applied to the mold 1.
Since the injection amount of the mold is large, the amount is small and the viscosity does not increase and the fluidity is not deteriorated.
It is possible to form a semi-gelled layer 4 having a desired thickness to be formed on the sole 2 by adjusting the heating of the.

Then, in the state where the semi-gelled layer 4 having a desired thickness is formed, the ungelled plastisol 5 remains due to the presence of the extra shoe sole plastisol.

Therefore, in the semi-gelling process of the shoe sole 2, the heating temperature of the shoe sole 2 of the mold 1 is
It is necessary to increase the viscosity of the shoe sole plastisol 3 injected into the mixture to a temperature at which it can be semi-gelled or gelled. If the heating temperature of the shoe sole 2 of the mold 1 is 100 ° C. or less, film formation is not sufficient. On the other hand, when heated to 200 ° C. or higher, the injected plastisol 3 gels in a short time and loses fluidity, making it impossible to obtain a smooth surface. The heating temperature of 2 may be in the range of 120 to 200 ° C, preferably about 140 to 180 ° C. If the heating temperature is set within the above range and the heating amount is changed, the mold 1
It is possible to adjust the thickness of the semi-gelled layer 4 formed on the substrate.

When the mold 1 is tilted,
The plastisol 3 for the sole will flow to the lower part due to the inclination, so that the semi-gelled layer 4 conforming to the shape of the sole 2 can be further deposited.

Further, a plastisol mold 1 for shoe soles
The injection into the mold may be performed, for example, in the same manner as in a conventional injection means in which an injection nozzle is inserted into the mold 1 and an appropriate pressure is applied toward the shoe sole 2, so that it does not adhere to anything other than the shoe sole 2. To do.

According to the semi-gelling process of the shoe sole 2, the amount of the plastisol 3 for the shoe sole that exceeds the amount required for molding the shoe sole 2 is poured and heated, and the plastisol flows by heating. As shown in FIG. 1B, the semi-gelling layer 4 having a desired thickness is formed along the inner surface of the mold 1 by a large amount of plastisol 3 for the sole of the shoe, as shown in FIG. 1B. Can be formed.

Further, the thickness of the semi-gelated layer 4 to be formed can be changed by changing the heating amount, and the semi-gelled layer can be partially changed by partially changing the heating amount. It is also possible to change the film forming thickness of No. 4.

(4) After that, in the usual slush molding method, the excess ungelled plastisol 5 due to the formation of the semi-gelled layer 4 on the shoe sole 2 is discharged, and then the plastisol 6 for the shoe body is injected. However, in the present invention, the plastisol 6 for the shoe body is injected with the ungelled plastisol 5 for the sole left as it is.

The plastisol 6 for the shoe body, which is injected onto the ungelled plastisol 5 for the sole, is a plastisol mixed with a polyvinyl chloride resin different from the plastisol 3 for the sole, and a predetermined amount is molded. 1 to the upper opening of the mold 1 or the vicinity thereof according to the height required as a shoe for the product.

As the plastisol 6 for the shoe body, a plastisol mixed with a conventionally used ordinary polyvinyl chloride resin is used. For example, a composition example of such plastisol is polyvinyl chloride paste resin: 100.
Parts by weight, plasticizer: 80-100 parts by weight, stabilizer: 2-3
Parts by weight, pigment: 1 to 2 parts by weight.

When the plastisol 6 for the shoe body is injected into the non-gelled plastisol 5 for the sole of the shoe in this way, FIG.
And, as shown in FIG. 2 (a), two plastisol mixing parts 7 are generated in the mold 1, and the mixing ratio (concentration) of the plastisol 3 for shoe sole is high in the part of the mold 1 close to the shoe sole 2. The mixing ratio (concentration) of the plastisol 3 for the shoe sole becomes lower as it goes above the mold 1, and when the height exceeds a certain level, only the plastisol 6 for the shoe main body, in which the plastisol 3 for the shoe sole hardly mixes.

The range in which such a mixed portion 7 of two plastisols is formed can be changed by the amount of the residual ungelled plastisol 5, the injection amount of the plastisol 6 for the shoe body and the injection method. By injecting the plastisol 6 for the shoe main body in small amounts, it becomes possible to change the portion where the mixing ratio (concentration) of the mixing portion 7 is high and the range thereof.

After this, the shoe body 8 and the heel portion (heel portion) 9 and the like are slush-molded in the same manner as the slush-molding method which is usually performed. These steps will be briefly described.

(5) After injecting the plastisol 6 containing the polyvinyl chloride resin for the shoe body into the mold 1 in this manner, the entire mold 1 is heated to semi-gelate the plastisol 3 for the sole of the first layer. Mold 1 on layer 4
A mixed semi-gelated layer 10 of a mixed plastisol having a predetermined thickness and a semi-gelled layer 1 of a plastisol 6 for a shoe body on the entire inner surface of the shoe
1 as the second layer.

The thickness of the second layers 10 and 11 is adjusted by adjusting the heating time and the heating temperature of the entire mold 1.

(6) The second layers 10 and 11 thus formed in the mold 1 are composed of the mixed semi-gelling layer 10 and the shoe main body semi-gelling layer 11, and the mixed semi-gelling layer 10 is composed of the shoe. The semi-gelling layer 11 having the function of the plastisol 6 of the shoe main body 8 has an intermediate function of the plastisol 3, 6 forming the shoe sole 2 and the shoe main body 8 toward the lower part, and the upper part thereof has It is formed on the inner surface of the mold 1.

Therefore, if the injection amount of the plastisol 3 for the sole is increased to increase the residual amount of the non-gelled plastisol 5 after the formation of the semi-gelled layer 4, the plastisol 3 for the sole is relatively extended to the upper part. You will be able to exert a strong function,
If the amount of the ungelled plastisol 5 of the plastisol 3 for the sole is small, the amount of the mixing part 7 of the two plastisols 3, 6 can be made small to clearly distinguish the functions of the sole 2 and the shoe main body 8. become able to.

Therefore, for example, if the shoe sole 2 is molded by using the shoe plastisol 3 mixed with the oil-resistant plasticizer, the mixed semi-gelated layer 10 is formed on the lower part of the shoe main body 8, so that the shoe is formed. At the same time as providing oil resistance to the bottom, it also gives body oiliness to the parts of the shoe body that come into contact with oil, and gradually increases the function of the shoe body toward the top of the shoe body. The necessary functions can be given to the necessary parts of the sex.

Thus, not only the oil resistance but also the strength,
Hardness, abrasion resistance, chemical resistance, etc. can be given to necessary parts of the shoe sole and the lower part of the shoe body.

(7) Next, the plastisol 6 containing the polyvinyl chloride resin for the shoe body in the non-gelled state remaining on the inner surface of the mold 1 is discharged.

(8) Thereafter, in this embodiment, as shown in FIG. 1D, the heel plastisol 12 is injected into the heel portion 4 of the mold 1 so that the heel portion 4 becomes flat. .

(9) After the injection of the plastisol 3, 6, 12 into the shoe sole 2, the shoe body 8 and the heel 9 necessary for the skin 13 of the slush molded shoe in this way, the entire mold 1 is sufficiently heated. As a result, the first layer 4 which is the semi-gelled shoe sole 2, the second layers 10 and 11 which is the shoe main body 8 and the third layer which is the heel 9 are completely solidified.

(10) After this, the mold 1 is cooled and cooled.
By removing from the mold, the skin 13 of the slush molded shoe is obtained as shown in FIG.

Parts such as a back cloth (inner boot) and an insole are assembled to the skin 13 of the slush-molded shoe thus molded by sewing, bonding, etc., and further painting is performed to finish the final product.

According to the method for manufacturing a slush-molded shoe having such a multilayer, when manufacturing a multilayer slush-molded shoe by using different materials for the shoe sole 2 and the shoe body 8, the shoe sole 2 and the shoe body 8 are manufactured. It is possible to change functions such as oil resistance and wear resistance with respect to each other, and to make these functions change continuously or to make them relatively distinct.

In addition, since the plastisol 3 for the sole of the shoe is poured into the shoe sole 2 in an amount larger than that required for the molding to heat and semi-gelate the sole 2, the shape of the sole 2 of the mold 1 is conformed to. It becomes easy to form a film.

Furthermore, since it is not necessary to discharge the ungelled plastisol 5 from the shoe sole 2, the manufacturing process is simplified and the production efficiency is improved.

Therefore, it is not necessary to discharge the ungelled plastisol 5 from the shoe sole 2 to form a film having a required thickness, and at the same time, the material of the shoe sole 2 and the shoe body 8 can be continuously changed according to the required functions. It is possible to manufacture multi-layered slush molded shoes that vary and are distinct.

Further, by changing either or both of the injection amount of the plastisol for the sole and the amount of the residual non-gelled plastisol of the plastisol for the sole, the plastisol for the sole and the plastisol for the main body of the shoe are changed. It is possible to change the film formation range and the mixing ratio of the mixed semi-gelled layer of (3), and it is possible to manufacture a multi-layered slush molded shoe according to the functions required for the sole and the lower part of the shoe main body.

Next, a concrete plastisol mixed with a polyvinyl chloride resin as the plastisol 3 for the sole of the shoe used in the production of the slush-molded shoe of the present invention will be described.

A resin which is particularly effective for improving the performance of the sole 2 and the lower part of the shoe main body 8 is any one of the following three: a crosslinkable polyvinyl chloride resin, a thermosetting plasticizer, an oil resistant plasticizer, or these. Is a combination of two or more, and specifically, the following seven types A to G are provided.

A: Crosslinkable polyvinyl chloride resin B: Thermosetting plasticizer C: Oil resistant plasticizer D: Crosslinkable polyvinyl chloride resin and thermosetting plasticizer E: Thermosetting plasticizer and oil resistant plasticizer F: Crosslinkable polyvinyl chloride resin and oil resistant plasticizer G: Crosslinkable polyvinyl chloride resin, thermosetting plasticizer and oil resistant plasticizer Furthermore, combining each of these A to G with a non-slip material And finally,
A, A +, B, B +, ………, G, G + total 1
There are four types.

(1) A: crosslinkable polyvinyl chloride resin,
A + anti-slip material The crosslinkable polyvinyl chloride resin used as the plastisol 3 for shoe soles in the present invention has one or more kinds of hydroxyl group, carboxyl group, epoxy group, alkoxy group and the like in the molecule, and is capable of crosslinking isocyanate and the like. The agent is mixed and heated to crosslink and cure.

As the crosslinking agent, tolylene diisocyanate, tolylene isocyanate dimer, diphenylmethane diisocyanate, hexamethylene diisocyanate, trimethylolpropane-tolylene diisocyanate adduct, triphenylmethane triisocyanate, polymethylene polyphenyl isocyanate, succinic acid, glutar Acids, adipic acid, pimelic acid, azelaic acid, phthalic acid, maleic acid, cyclohexanedicarboxylic acid and their anhydrides, epoxies up to n = 10, triglycidyl isocyanate, 4,4'-diaminodiphenylmethaneglycidylamine, in the molecule Mercapto (-S-
H) group-containing azole, thiazole and triazine compounds or metal salts thereof (2-R-4.6-dimercapto-S-triazine etc.), azo groups (-N = N-) in the molecule.
Group), a -S-S- group, a -NS- group, a compound containing a -O-O- group, and the like.

An example of the composition of the plastisol mixed with the crosslinkable polyvinyl chloride resin is polyvinyl chloride paste resin:
50 to 90 parts by weight, crosslinkable polyvinyl chloride resin: 10
50 parts by weight, plasticizer: 80 to 120 parts by weight, stabilizer: 2
~ 3 parts by weight, crosslinking agent: 0.5 to 3 parts by weight, pigment: 0 to 2
Parts by weight.

In the present invention, the shoe sole portion 2 of the shoe body 8 is
All or part of the above is composed of a heated gelled product of plastisol mixed with a crosslinkable polyvinyl chloride resin, and the plastisol 3 for the sole is left as the ungelled plastisol 5 and mixed with the plastisol 6 for the shoe main body to form a plastisol. A mixing portion 7 can be formed so as to be continuous from the shoe sole 2 to a part of the shoe main body 8, and the heat resistance of the shoe sole 2 is improved by cross-linking, making it difficult to melt even under heating conditions. (Heat resistance) is improved, and the lower part of the shoe body 8 has characteristics and functions similar to those of the sole 2.

Further, the shoe sole 2 and the shoe body 8 are formed by crosslinking.
The lower strength, oil resistance, chemical resistance and wear resistance are also improved.

If plastisol mixed with a crosslinkable polyvinyl chloride resin is injected up to the upper end of the slush molding mold 1 to crosslink, peeling from the slush molding mold 1 becomes difficult due to crosslinking, and demolding property is improved. However, in the present invention, the sole plastisol 3 mixed with the crosslinkable polyvinyl chloride resin is used only in all or a part of the sole 2, and in the lower part of the main body 8 of the shoe. Since the concentration decreases due to mixing, the demolding property does not decrease so much, and the amount of plastisol mixed with an expensive crosslinkable polyvinyl chloride resin can be suppressed to the necessary minimum, resulting in low manufacturing cost. The rise can be suppressed.

The shoe body 8 is made of a heat-gelled plastisol mixed with a conventional polyvinyl chloride resin, and the hardness, strength, and texture of a conventional slush molded shoe will be improved. Does not change,
An example of the composition of such a plastisol is polyvinyl chloride paste resin: 100 parts by weight, plasticizer: 80-100 parts by weight, stabilizer: 2-3 parts by weight, pigment: 1-2 parts by weight.

Further, in the present invention, the plastisol 3 in which the crosslinkable polyvinyl chloride resin as the raw material of the shoe sole 2 is mixed.
Further, if necessary, by further mixing an anti-slip material, the anti-slip property of the shoe sole can be further improved in addition to the strength, oil resistance and chemical resistance of the shoe sole.

Since the anti-slip material is generally colored and insoluble, if it mixes into a portion other than the sole 2 of the shoe body 8, it is recognized as a foreign substance and the appearance quality is remarkably deteriorated. Since it is mixed only in the sole 2, it is possible to impart the slip resistance to the sole without deteriorating the appearance quality. Rather, by mixing the anti-slip material, the anti-slip property that can be surely imparted to the shoe sole can be visually appealed, so that the commercial property of the slush-molded shoes to be sold in a snowy place or the like can be improved.

When the plastisol 3 for shoe sole mixed with this anti-slip material is used, it is not necessary to give this function / characteristic to the lower part of the shoe main body 8, so that only a part of the shoe sole 2 which becomes the ground contact portion is used. It is enough to form a film,
The injection amount may be adjusted accordingly.

Specific examples of the anti-slip material include cotton, suf (staple fiber), rayon, acrylic, vinylon, nylon, polyester, polyurethane, and glass fiber having a thickness of 50 denier or less and a length of 50 denier or less. Relatively thin and short fibers of 3.0 mm or less, skin powder, natural plant powder such as chaff powder, walnut powder, metal whiskers, inorganic whiskers, metal powder such as iron and aluminum, alumina powder, ceramics It is an insoluble powder such as powder or synthetic rubber such as NBR, crosslinked resin, acrylic resin, urethane resin and the like. The powder anti-slip material has a size of 3
It is 0 mesh or less, preferably 50 mesh or less.

[0080]

【Example】

 (Example 1)

[0081]

[Table 1]

First, as a plastisol for soles, for soles having the composition shown in Table 1 (hereinafter, simply referred to as the first layer).
About 20 mm of plastisol including the bottom design of the shoe sole is injected into the mold, and while heating the mold at 150 ° C for 1 to 2 minutes, a semi-gelled layer is formed on the entire sole of the shoe, leaving ungelated plastisol. I was in a state of

Next, with the plastisol for the first layer remaining, according to the composition of Table 1 above, plastisol for the shoe main body (hereinafter, simply referred to as the second layer) is filled to the upper end of the mold. Inject the first layer and the second layer on the bottom of the shoe
Mixture of plastisols for layers With the mixed plastisols formed, the mold was heated at 180 ° C. for 1-2 minutes to attach the mixed semi-gelated layer and semi-gelated layer of desired thickness to the entire inner surface of the mold. After that, the non-gelled plastisol was discharged.

Further, in order to form the heel portion, a plastisol mixed with a polyvinyl chloride resin for the heel portion is poured into the heel portion and filled at 200 ° C. according to the composition of Table 1 above.
At 5 to 7 minutes, the first layer was sufficiently crosslinked, and the second layer and the heel portion were sufficiently gelated.

After cooling, the slush-molding shoe was taken out from the slush-molding mold to obtain a slush-molding shoe having a black sole and a shoe body.

On the other hand, a slush molding of Comparative Example was added under the same conditions except that the first layer did not contain a crosslinkable polyvinyl chloride plastisol and the ungelled plastisol of the plastisol for shoe sole was discharged. Manufactured shoes.

The strength, wear resistance, cigarette resistance (heat resistance), and oil resistance and chemical resistance of the sole and the lower part of the shoe body of these two slush molded shoes were evaluated as follows. (Strength) Tensile strength, elongation, and tear strength were measured using a Shopper-type tensile tester based on JIS K-6301. (Abrasion resistance) Wearing wheel CS-1 by Taber abrasion tester
The wear loss at 1000 revolutions was measured by 0. (Cigarette resistance) A JIS K-6301 No. 1 test piece was cut out from the shoe sole and hung in an oven at 180 ° C for 5 minutes, and the presence or absence of melt drop and the elongation rate when it did not drop were measured.

In addition, the two slush-molded shoes produced were used to actually step on the cigarette to extinguish the fire, and the sole of the shoe was melted.
The deformed state was confirmed. (Oil resistance to chemicals) JIS No. 3 oil and vegetable oil (soybean oil) were used to measure the weight change when immersed at 40 ° C. for 96 hours.

Table 2 shows the results of these measurements.
The slush-molded shoe molded according to the present invention has the same strength, hardness and texture of the upper part of the shoe main body as those of the conventional slush-molded shoes. It was found that the cigarette resistance was excellent, tensile strength, abrasion resistance, oil resistance and chemical resistance were improved, and various properties of the shoe sole and the lower part of the shoe body were improved.

[0090]

[Table 2]

Example 2 In order to confirm the improvement of the slip resistance,
As shown in Table 1, whiskers (manufactured by Shikoku Kasei Co., Ltd.) as a slip-resistant material were mixed with the crosslinkable polyvinyl chloride plastisol, which is the raw material for the sole of the shoe used in Example 1, to give Example 1 Slush molded shoes were manufactured by the manufacturing method of the present invention in exactly the same manner.

The slip resistance of the obtained slush molded shoes was evaluated as follows. (Slip resistance) Shoes were placed on each of the P tile, vinyl flooring, and ice, pulled with a load of 10 kgf, and the stress when starting was measured.

The results are shown in Table 2. Together with the results of Example 1, it can be seen that the slush-molded shoes of the manufacturing method of the present invention have excellent anti-slip properties in addition to the effects of Example 1.

(2) B: Thermosetting plasticizer, B + anti-slip material The thermosetting plasticizer mixed with the polyvinyl chloride resin used as the plastisol 3 for shoe sole in the present invention is a liquid before curing, so it is converted into plastisol. When mixed, the viscosity of the plastisol can be adjusted.

There are many types of thermosetting plasticizers,
Since the hardness after hardening can be selected from a relatively soft one to a hard one, the hardness of the shoe sole and the lower part of the shoe main body can be freely set to some extent.

The types of thermosetting plasticizers that can be used here are listed below. Allyl ester-based thermosetting plasticizer diallyl phthalate, allyl acrylate, triallyl theateryl, diallyl maleate, dichloroallyl maleate, diallyl itaconic acid, diallyl sebacate, diallyl adipate, diallyl malonate, diallyl glycolate, Triallyl aconitate, triallyl phosphate, etc.

Acrylic ester-based thermosetting plasticizer Allyl methacrylate, diallyl fumarate, triethylene glycol dimethacrylate, ethylene glycol dimethacrylate, cyclohexyl methacrylate, tetraethylene glycol dimethacrylate, polyethylene glycol dimethacrylate, polypropylene glycol dimethacrylate, butane 1,4 diol dimethacrylate, trimethylolpropane trimethacrylate, trimethylolpropane triacrylate, trimethylolpropane propylene oxide adduct triacrylate, dimethylaminoethyl methacrylate, 1,
3 butylene glycol dimethacrylate etc.

Unsaturated Polyester Thermosetting Plasticizer Radical polymerization is carried out by heating with a linear polyester having some double bonds in the molecule.

Epoxy Thermosetting Plasticizer A curing agent such as an aliphatic amine or an acid anhydride is added to a long-chain or cycloaliphatic epoxy resin to cure it.

In particular, an allyl ester type thermosetting plasticizer,
Acrylic ester-based thermosetting plasticizers include benzoyl peroxide (BPO), t-butyl perbenzoate (TBPB), dicumyl peroxide (DC) as polymerization catalysts.
PO), cumene hydroperoxide (CHPO), etc. are added and heated to radically polymerize and cure.

The composition example of the plastisol containing the above thermosetting plasticizer is a polyvinyl chloride paste resin: 10
0 parts by weight, plasticizer: 80 to 120 parts by weight, thermosetting plasticizer: 10 to 40 parts by weight, catalyst: 0.3 to 1 part by weight, stabilizer: 2 to 3 parts by weight, crosslinking agent: 0.5 ~ 3 parts by weight, pigment:
0 to 2 parts by weight.

In the slush molded shoe according to the present invention produced by using such a plastisol for the sole (for the first layer), the lower part of the main body of the shoe and the whole or part of the sole are mixed with a thermosetting plasticizer. Since the plastisol is composed of a heat-gelated product, the heat resistance of the shoe sole and the lower part of the shoe main body is improved, it is difficult to melt even under heating conditions, and the cigarette resistance (heat distortion resistance) is improved.

Further, the strength, oil resistance, chemical resistance, and wear resistance of the shoe sole and the lower portion of the shoe body are also improved.

If plastisol mixed with a thermosetting plasticizer is injected up to the upper end of the slush molding mold, peeling from the slush molding mold becomes difficult and releasability deteriorates significantly, making mass production difficult. However, here, since the plastisol mixed with the thermosetting plasticizer is used only for the whole or a part of the shoe sole and the lower part of the shoe main body where the ungelled plastisol is mixed, the mold releasability does not decrease so much, Further, since the usage amount can be suppressed to a necessary minimum, it is possible to suppress an increase in manufacturing cost. (Example 3)

[0105]

[Table 3]

First, as the plastisol for the sole of the shoe, about 20 plastisols for the first layer having the composition shown in Table 3 including the bottom design of the sole in the slush molding mold were used.
mm was injected, and a semi-gelled layer was formed on the entire bottom of the shoe while heating at 150 ° C. for 1 to 2 minutes so that the ungelled plastisol remained.

Then, with the plastisol for the first layer remaining, in accordance with the composition of Table 3 above, the polyvinyl chloride paste resin for the second layer was poured all the way to the upper end of the slush molding mold to form the shoe. With the mixture of the two plastisols in the lower part of the main body, the mixture was heated at 180 ° C. for 1 to 2 minutes to adhere the mixed semi-gelated layer and semi-gelated layer having a desired thickness to the inner surface of the slush molding mold. After that, the non-gelled plastisol was discharged.

Further, in order to form the heel portion, a plastisol mixed with a polyvinyl chloride resin for the heel portion is injected and filled into the heel portion of the mold according to the composition shown in Table 3 above, and the mixture is heated at 200 ° C. for 5 to 7 hours. Heated for a minute to fully crosslink the first layer and to sufficiently gel the second layer and heel.

After cooling, the shoe was taken out of the mold to obtain a slush-molded shoe in which both the shoe sole and the shoe body were black.

On the other hand, a plastisol containing no thermosetting plasticizer was used for the first layer, and a step of discharging the ungelled plastisol of the plastisol for the sole was added. Produced slush molded shoes.

The strength, wear resistance, cigarette resistance (heat resistance), and oil resistance and chemical resistance of the shoe sole and the lower part of the shoe body of these two slush molded shoes were evaluated by the methods already described.

Table 4 shows the results of these measurements.
The slush-molded shoe according to the manufacturing method of the present invention has the same strength, hardness and texture of the upper part of the shoe body as those of the conventional slush-molded shoes, and the shoe sole and the lower part of the shoe body are more resistant to wear than ever before. It was found that the properties of the shoe sole and the lower part of the shoe body were improved by improving the tensile strength, heat distortion resistance (cigarette resistance), and oil and chemical resistance.

[0113]

[Table 4]

Example 4 To confirm the improvement of the slip resistance,
As shown in Table 3, whiskers (Shikoku Kasei Kogyo Co., Ltd.) were added to the plastisol mixed with the thermosetting plasticizer, which is the raw material for the sole of the shoe, used in Example 3 as the anti-slip material.
Was further mixed, and a slush molded shoe was manufactured by the manufacturing method of the present invention in exactly the same manner as in Example 3.

With respect to the obtained slush molded shoes, the slip resistance was evaluated in the same manner as above by the measuring method already described,
The results are shown in Table 4.

In addition to the results of Example 3, it can be seen that the slush molded shoe of the manufacturing method of the present invention is excellent in slip resistance in addition to the effects of Example 3.

(3) C: Oil-Resistant Plasticizer, C + Slip-Proof Material In the present invention, a plastisol mixed with an oil-resisting plasticizer (for example, a high-molecular-weight plasticizer) is used as the plastisol 3 for the sole of the shoe. And oil resistance to the lower part of the shoe body, etc. to reduce extraction into gasoline and oils,
Further improve the adaptability for use at gas stations and various food factories.

The oil-resistant plasticizer is a polymerizable polyester plasticizer such as adipic acid type polyester and phthalic acid type polyester, and has a molecular weight of 800 or more and 4000 or less, preferably 1000 or more and 3000 or less.

When the degree of polymerization is less than 800, the plasticizer is extracted into vegetable oils, animal oils, gasoline, etc. in food factories to become hard and the effect of improving oil resistance is reduced, while the degree of polymerization is 20.
When it is from 00 to 4000, the effect of improving the oil resistance becomes large, but when the degree of polymerization exceeds 4000, the viscosity of the plastisol becomes high and the fluidity is remarkably lowered, resulting in insufficient workability.

An example of the composition of the plastisol mixed with the oil resistant plasticizer is polyvinyl chloride paste resin: 100 parts by weight, primary plasticizer: 10 to 60 parts by weight, oil resistant plasticizer: 1
0-40 parts by weight, stabilizer: 2-3 parts by weight, pigment: 0
2 parts by weight.

In the slush-molded shoe according to the manufacturing method of the present invention, all or a part of the lower part of the shoe main body and the sole is made of a heat-gelated plastisol mixed with an oil-resistant plasticizer. The oil resistance and chemical resistance of are improved.

If plastisol mixed with an oil-resistant plasticizer is to be injected up to the upper end of the slush molding mold, the injection will be difficult or time-consuming because the viscosity will be so high that the efficiency will decrease. Also, it takes a long time to discharge, and when the mold is tilted, there is a problem that plastisol accumulates in the lower part and the wall thickness becomes thicker.However, here, plastisol mixed with an oil resistant plasticizer is used. Since all or part of the shoe sole and only the lower part of the shoe main body where mixing with the ungelled plastisol occurs, the amount is small and the discharge is in the city, so that such a problem does not occur. Further, since the amount of plastisol mixed with an expensive oil-resistant plasticizer can be suppressed to the necessary minimum,
An increase in manufacturing cost can be suppressed. (Example 5)

[0123]

[Table 5]

First, as the plastisol for the sole of the shoe, plastisol having the composition shown in Table 5 and mixed with the oil-resistant plasticizer for the first layer was poured into the mold for about 20 mm including the design of the bottom of the sole, and the temperature was changed to 150 ° C. While heating the mold for 1 to 2 minutes, a semi-gelled layer was formed on the entire bottom of the shoe so that the ungelled plastisol remained.

Next, with the plastisol for the first layer remaining, according to the composition shown in Table 5, the plastisol for the second layer was fully injected to the upper end of the slush molding mold, and the plastisol was applied to the lower part of the shoe body. Mixed plastisol for the first layer and the second layer In the state where the plastisol is formed, the mold is heated at 180 ° C. for 1 to 2 minutes to form a mixed semi-gelated layer having a desired thickness on the inner surface of the slush molding mold. After applying the semi-gelled layer, the ungelled plastisol was discharged.

Further, in order to form the heel portion, a plastisol mixed with a polyvinyl chloride resin for the heel portion was injected and filled in the heel portion according to the composition shown in Table 5 above, and the temperature was set to 200 ° C.
By heating for 5 to 7 minutes, the first layer was sufficiently crosslinked and the second layer and the heel portion were sufficiently gelated.

After cooling, the slush-molding shoe was taken out from the slush-molding mold to obtain a slush-molding shoe according to the method of the present invention in which both the shoe sole and the shoe body were black.

On the other hand, a plastisol containing no oil-resistant plasticizer was used for the first layer, and a step of discharging the ungelled plastisol of the plastisol for the sole was added. Molded shoes were manufactured.

In addition to the oil and chemical resistance of the sole and the lower part of the shoe body of these two slush molded shoes, the strength,
The abrasion resistance and cigarette resistance (heat resistance) were evaluated in the same manner as above by the measuring method already explained.

Table 6 shows the results of these measurements.
The slush molded shoe molded according to the present invention has the same strength, hardness and texture of the upper part of the shoe main body as those of the conventional slush molded shoes, and the shoe sole and the lower part of the shoe main body are more oil resistant than the conventional one. Further, it is understood that the chemical resistance is excellent, and various properties of the shoe sole and the lower part of the shoe body are improved as compared with the conventional two-layer slush molded shoe.

[0131]

[Table 6]

Example 6 To confirm the improvement of the slip resistance,
As shown in Table 5, the plastisol in which the raw material for the shoe sole used in Example 5 was mixed with the oil-resistant plasticizer was further mixed with whiskers (manufactured by Shikoku Kasei Kogyo Co., Ltd.) as an anti-slip material. A slush molded shoe was manufactured by the method of the present invention in exactly the same manner as in.

The slip resistance of the obtained slush-molded shoes was evaluated in the same manner by the measuring method described above.

The results are shown in Table 6. In addition to the results of Example 5, it can be seen that the slush molded shoe of the manufacturing method of the present invention is excellent in slip resistance in addition to the effects of Example 5.

(4) D: Crosslinkable Polyvinyl Chloride Resin, Thermosetting Plasticizer, D + Slipproof Material In this invention, a plastisol in which a crosslinkable polyvinyl chloride resin and a thermosetting plasticizer are mixed is used. Since the poly (vinyl chloride) resin has been described in (1) A above, the description thereof will be omitted.

The plastisol mixed with the crosslinkable polyvinyl chloride resin tends to have a relatively high viscosity when the crosslinkable polyvinyl chloride resin is a powder and contains a small amount of the plasticizer. There is a risk that the workability of the work such as injection into the same will be reduced.

Therefore, in order to prevent deterioration of workability, it is advisable to mix a thermosetting plasticizer with the plastisol described above.

Since the thermosetting plasticizer is a liquid before curing, when mixed with a plastisol mixed with a crosslinkable polyvinyl chloride resin, the viscosity of this plastisol can be adjusted, and after heating, it crosslinks to form a resin. Also, since there are a wide variety of thermosetting plasticizers and the hardness after curing can be selected from relatively soft to hard, you can freely set the hardness of the shoe sole and the lower part of the shoe body to some extent. Will be able to.

The types of thermosetting plasticizers that can be used here have been described in (2) B above, and are therefore omitted here.

A composition example of a plastisol in which such a crosslinkable polyvinyl chloride resin and a thermosetting plasticizer are mixed is as follows:
Polyvinyl chloride paste resin: 50 to 90 parts by weight, crosslinkable polyvinyl chloride resin: 10 to 50 parts by weight, plasticizer:
80-120 parts by weight, thermosetting plasticizer: 10-40 parts by weight, catalyst: 0.3-1 part by weight, stabilizer: 2-3 parts by weight,
Crosslinking agent: 0.5 to 3 parts by weight, pigment: 0 to 2 parts by weight.

A slush-molded shoe according to the present invention produced by using such a plastisol for the sole (for the first layer) has a lower part of the main body of the shoe and the whole or a part of the sole, which are made of a crosslinkable polyvinyl chloride resin and a heat-resistant material. Since it is composed of a heat-gelled substance of plastisol mixed with a curable plasticizer, the heat resistance of the shoe sole and the lower part of the shoe body is improved by cross-linking, making it difficult to melt even under heating conditions, and cigarette resistance (heat deformation Sex) is improved.

Further, the cross-linking also improves the strength, oil resistance, chemical resistance, and wear resistance of the shoe sole and the lower portion of the shoe main body.

If plastisol mixed with a crosslinkable polyvinyl chloride resin and a thermosetting plasticizer is injected up to the upper end of the slush molding mold to crosslink,
Cross-linking makes it difficult to release from the slush molding mold and remarkably lowers the mold release property, making mass production difficult, but here the plastisol mixed with cross-linkable polyvinyl chloride resin and thermosetting plasticizer is used for the sole of the shoe. The whole or a part of this and the ungelled plastisol are mixed only in the lower part of the shoe main body, so the mold releasability does not deteriorate so much, and the usage amount can be suppressed to the necessary minimum, which reduces the manufacturing cost. The rise can be suppressed. (Example 7)

[0144]

[Table 7]

First, as the plastisol for the sole of the shoe, about 20 plastisols for the first layer having the composition shown in Table 7 including the bottom design of the sole in the slush molding mold were used.
mm was injected, and a semi-gelled layer was formed on the entire bottom of the shoe while heating at 150 ° C. for 1 to 2 minutes so that the ungelled plastisol remained.

Next, with the plastisol for the first layer remaining, according to the composition shown in Table 7, the plastisol for the second layer was poured all the way to the upper end of the slush molding mold, and the plastisol for the second layer was applied to the lower part of the shoe body. After mixing the two plastisols with each other, the mixture is heated at 180 ° C. for 1 to 2 minutes so that the mixed semi-gelated layer and the semi-gelated layer having a desired thickness are attached to the inner surface of the slush molding mold, and then ungelled. The depleted plastisol was discharged.

Further, in order to form the heel portion, a plastisol mixed with a polyvinyl chloride resin for the heel portion is injected and filled in the heel portion of the mold in accordance with the composition shown in Table 7 above, and the mixture is heated at 200 ° C. for 5 to 7 ° C. Heated for a minute to fully crosslink the first layer and to sufficiently gel the second layer and heel.

After cooling, the shoe was taken out of the mold to obtain a slush-molded shoe in which both the shoe sole and the shoe body were black.

On the other hand, a plastisol containing no crosslinkable polyvinyl chloride resin and thermosetting plasticizer was used for the first layer,
Moreover, a slush molded shoe of Comparative Example was manufactured under the same conditions except that a step of discharging the ungelled plastisol of the plastisol for shoe sole was added.

The strength, abrasion resistance, cigarette resistance (heat resistance), and oil resistance and chemical resistance of the sole and the lower part of the shoe body of these two slush molded shoes were evaluated by the methods already described.

Table 8 shows the results of these measurements.
In the slush molded shoe according to the manufacturing method of the present invention, the shoe sole and the lower portion of the shoe main body are particularly excellent in heat deformation resistance (cigarette resistance) as compared with the conventional one, and further, tensile strength, abrasion resistance,
It was found that oil resistance and chemical resistance were also improved, and various properties of the shoe sole and the lower part of the shoe body were improved.

[0152]

[Table 8]

(Example 8) To confirm the improvement of the slip resistance,
As shown in Table 7, a plastisol mixed with a crosslinkable polyvinyl chloride resin and a thermosetting plasticizer, which are raw materials for the sole of the shoe used in Example 7, was used as a non-slip material for whiskers (manufactured by Shikoku Chemicals Co., Ltd.). ) Was further mixed, and a slush molded shoe was manufactured by the manufacturing method of the present invention in exactly the same manner as in Example 7.

With respect to the obtained slush-molded shoes, the slip resistance was evaluated in the same manner as above by the measuring method already described,
The results are shown in Table 8.

In addition to the results of Example 7, it can be seen that the slush molded shoe of the manufacturing method of the present invention is excellent in slip resistance in addition to the effects of Example 7.

(5) E: Thermosetting Plasticizer and Oil-Resistant Plasticizer, E + Slipproofing Material In this invention, a plastisol in which a thermosetting plasticizer and an oil-resistant plasticizer are mixed is used. Since the above has been described in the above (2) B and the oil resistant plasticizer in the above (3) C, description thereof will be omitted.

Here, an oil-resistant plasticizer (for example, a high-molecular-weight plasticizer) is further mixed with the plastisol mixed with the thermosetting plasticizer, so that the shoe sole and the lower part of the shoe main body are not oil-resistant. Properties and reduce extraction into gasoline and oils, further improving adaptability for use at gas stations and various food factories.

Further, the oil-resistant plasticizer has a high viscosity, but the thermosetting plasticizer is a liquid in the sol, which lowers the viscosity and improves workability.

A composition example of a plastisol in which a thermosetting plasticizer and an oil resistant plasticizer are mixed is as follows: polyvinyl chloride paste resin: 100 parts by weight, primary plasticizer: 10 to 50 parts by weight, oil resistant polyester plasticizer: 80 to 40 parts by weight, thermosetting plasticizer: 10-40 parts by weight, catalyst: 0.3-1 part by weight, stabilizer: 2-3 parts by weight, pigment: 0-2 parts by weight.

In the slush-molded shoe according to the manufacturing method of the present invention, all or a part of the lower part of the shoe main body and the sole part is composed of the heat-gelated substance of plastisol mixed with the thermosetting plasticizer and the oil-resistant plasticizer. The cross-linking improves the heat resistance of the shoe sole and the lower part of the shoe body, makes it difficult to melt even under heating conditions, and improves the cigarette resistance (heat distortion resistance). Further, the cross-linking also improves the strength and wear resistance of the shoe sole. Furthermore, since oil-resistant plasticizer is mixed, oil resistance and chemical resistance are also improved.

When the plastisol mixed with the thermosetting plasticizer and the oil-resistant plasticizer is injected to the upper end of the slush molding mold and heated, radical polymerization reaction due to the thermosetting plasticizer occurs in a chain to cause mold inside the mold. The entire plastisol may thicken or solidify and become difficult to discharge, and cross-linking makes it difficult to peel from the slush molding mold, resulting in a marked decrease in demoldability and difficult mass production. The plastisol mixed with thermosetting plasticizer and oil-resistant plasticizer is used only for the whole or part of the shoe sole and the lower part of the shoe body where the mixture with the ungelled plastisol occurs, so the demolding property is also greatly reduced. In addition, since the amount of the plastisol mixed with the expensive thermosetting plasticizer and oil-resistant plasticizer can be suppressed to the necessary minimum, It is possible to suppress the rise of the concrete cost. (Example 9)

[0162]

[Table 9]

First, as a shoe sole plastisol, a plastisol having a composition shown in Table 9 and being mixed with a thermosetting plasticizer and an oil-resistant plasticizer for the first layer is included in the mold including the bottom design of the shoe sole. 20mm injection, 1 ~ 150 ℃
While the mold was being heated for 2 minutes, a semi-gelled layer was formed on the entire bottom of the shoe so that the ungelled plastisol remained.

Next, with the plastisol for the first layer remaining, in accordance with the composition of Table 9 above, plastisol for the second layer was poured up to the upper end of the slush molding mold to fill the lower part of the shoe body. Mixed plastisol for the first layer and the second layer In the state where the plastisol is formed, the mold is heated at 180 ° C. for 1 to 2 minutes to form a mixed semi-gelated layer having a desired thickness on the inner surface of the slush molding mold. After applying the semi-gelled layer, the ungelled plastisol was discharged.

Further, in order to form the heel portion, a plastisol mixed with a polyvinyl chloride resin for the heel portion is poured into the heel portion and filled at 200 ° C. according to the composition of Table 9 above.
By heating for 5 to 7 minutes, the first layer was sufficiently crosslinked and the second layer and the heel portion were sufficiently gelated.

After cooling, the slush-molding shoe was taken out from the slush-molding mold to obtain a slush-molding shoe according to the method of the present invention in which both the shoe sole and the shoe body were black.

On the other hand, a plastisol containing no thermosetting plasticizer and no oil-resistant plasticizer was used for the first layer, and a step of discharging the ungelled plastisol of the plastisol for the sole was added. A slush-molded shoe of Comparative Example was manufactured according to the above.

The strength, wear resistance, cigarette resistance (heat resistance), and oil / chemical resistance of the sole and the lower part of the shoe body of these two slush-molded shoes were measured in the same manner as above by the measuring method described above. evaluated.

Table 10 shows the results of these measurements. The slush molded shoe molded according to the present invention has the same strength, hardness and texture of the upper part of the shoe main body as those of the conventional slush molded shoe, and moreover, the shoe sole and the lower part of the main body of the shoe are particularly resistant to heat deformation. It has excellent properties (cigarette resistance), improved tensile strength, abrasion resistance, oil resistance and chemical resistance, and improved various properties of the sole and lower part of the shoe body compared to conventional two-layer slush molded shoes. Recognize.

[0170]

[Table 10]

(Example 10) In order to confirm the improvement of the slip resistance, as shown in Table 9, a plastisol mixed with a thermosetting plasticizer and an oil resistant plasticizer, which are raw materials for the sole of the shoe used in Example 9, is used. Further, whiskers (manufactured by Shikoku Kasei Kogyo Co., Ltd.) were further mixed as an anti-slip material, and slush molded shoes were manufactured by the method of the present invention in exactly the same manner as in Example 9.

The obtained slush molded shoes were evaluated for slip resistance in the same manner by the measuring method described above.

The results are shown in Table 10. In addition to the results of Example 9, it can be seen that the slush molded shoe of the manufacturing method of the present invention is excellent in slip resistance in addition to the effects of Example 9.

(6) F: Crosslinkable Polyvinyl Chloride Resin and Oil-Resistant Plasticizer, D + Slipproof Material In this invention, a plastisol in which a crosslinkable polyvinyl chloride resin and an oil-resistant plasticizer are mixed is used. Since the vinyl resin and the oil resistant plasticizer have been described in the above (1) A and (3) C, the description thereof will be omitted. An example of the composition of a plastisol in which a crosslinkable polyvinyl chloride resin and an oil-resistant plasticizer are mixed is 90 to 0 parts by weight of a polyvinyl chloride paste resin, 10 to 100 parts by weight of a crosslinkable polyvinyl chloride resin, and primary plastic. Agent: 10 to 50 parts by weight, oil-resistant polyester plasticizer: 80 to 40 parts by weight,
Stabilizer: 2 to 3 parts by weight, crosslinking agent: 0.5 to 3 parts by weight, pigment: 0 to 2 parts by weight.

A slush-molded shoe produced by using the plastisol for soles having such a composition is a plastisol in which all or part of the lower part of the main body of the shoe and the sole is mixed with a crosslinkable polyvinyl chloride resin and an oil-resistant plasticizer. Since it is composed of a heat-gelled product, the cross-linking improves the heat resistance of the sole and the lower part of the main body of the shoe, makes it difficult to melt even under heating conditions, and improves the cigarette resistance (heat distortion resistance).

Further, the bridge improves the strength and wear resistance of the shoe sole and the lower part of the shoe body.

Furthermore, since the oil-resistant plasticizer is mixed, the oil resistance and chemical resistance of the shoe sole and the lower part of the shoe main body are also improved.

If plastisol mixed with a crosslinkable polyvinyl chloride resin and an oil-resistant plasticizer is injected up to the upper end of the slush molding mold to carry out crosslinking, peeling from the slush molding mold becomes difficult due to the crosslinking. The mold release property is remarkably reduced and mass production becomes difficult, but here, the plastisol mixed with the crosslinkable polyvinyl chloride resin and the oil resistant plasticizer is used for the whole or a part of the shoe sole and only this gelled plastisol. Since only the lower part of the shoe body where mixing occurs, the mold releasability does not deteriorate so much, and the amount of plastisol mixed with expensive crosslinkable polyvinyl chloride resin and oil resistant plasticizer is suppressed to the minimum necessary amount. Therefore, increase in manufacturing cost can be suppressed. (Example 11)

[0179]

[Table 11]

First, as a plastisol for shoe soles, Table 11
The plastisol for the first layer having the composition shown in FIG.
Inject to a height of more than 150 mm, 150 ℃
A semi-gelled layer was formed on the entire bottom of the shoe while heating for 1-2 minutes, so that the ungelled plastisol remained.

Next, with the plastisol for the first layer remaining, in accordance with the composition of Table 11 above, plastisol for the second layer was poured all the way to the upper end of the slush molding mold to the bottom of the shoe body. Mixing of plastisols for the first layer and the second layer With the plastisols formed, the mold is heated at 180 ° C. for 1 to 2 minutes to form a mixed semi-gel with a desired wall thickness on the entire inner surface of the slush molding mold. After depositing the layer and the semi-gelled layer, the ungelled plastisol was drained.

Further, in order to form the heel portion, a plastisol mixed with a polyvinyl chloride resin for the heel portion was injected and filled in the heel portion in accordance with the composition shown in Table 11 above.
The mixture was heated at 5 ° C for 5 to 7 minutes to sufficiently crosslink the first layer and to sufficiently gel the second layer and the heel portion.

After cooling, the slush molded shoe was taken out from the slush molded mold to obtain a slush molded shoe in which both the shoe sole and the shoe body were black.

On the other hand, a plastisol containing no crosslinkable polyvinyl chloride resin and an oil-resistant plasticizer was used for the first layer, and a step of discharging the ungelled plastisol of the plastisol for shoe soles was added, and the others were exactly the same. Depending on the conditions, a slush molded shoe of Comparative Example was manufactured.

The strength, wear resistance, cigarette resistance (heat resistance), and oil resistance and chemical resistance of the sole and the lower part of the shoe body of these two slush-molded shoes were measured in the same manner as above by the measuring method already described. Evaluated.

Table 12 shows the results of these measurements. The slush-molded shoe molded according to the present invention has the same strength, hardness and texture of the upper part of the shoe main body as those of the conventional slush-molded shoes. It can be seen that the excellent resistance to cigarettes), improved tensile strength, wear resistance, and oil / chemical resistance, and improved various properties of the sole and the lower part of the shoe body as compared with the conventional two-layer slush molded shoe.

[0187]

[Table 12]

(Example 12) In order to confirm the improvement of the slip resistance, as shown in Table 11, the crosslinkable polyvinyl chloride resin, which is the raw material for the shoe sole used in Example 11, and the oil resistant plasticizer were mixed. Example 1 was mixed with plastisol and whiskers (manufactured by Shikoku Kasei Kogyo Co., Ltd.) as an anti-slip material.
A slush molded shoe was manufactured by the manufacturing method of the present invention in exactly the same manner as in 1.

The slip resistance of the obtained slush-molded shoes was evaluated by the measuring method described above.

The results are shown in Table 12. Together with the results of Example 11, the slush molded shoe of the manufacturing method of the present invention is
It can be seen that in addition to the effect of Example 11, the slip resistance is also excellent.

(7) G: Crosslinkable Polyvinyl Chloride Resin, Thermosetting Plasticizer, Oil-Resistant Plasticizer, E + Slipproof Material In the present invention, the crosslinkable polyvinyl chloride resin, thermosetting plasticizer, and oil-resistant plasticizer are used. However, the crosslinkable polyvinyl chloride resin and the oil-resistant plasticizer have been described in the above (1) A, (2) B, and (3) C, and thus will be omitted. Examples of the composition of a plastisol in which a crosslinkable polyvinyl chloride resin, a thermosetting plasticizer and an oil-resistant plasticizer are mixed are as follows: polyvinyl chloride paste resin: 50 to 90 parts by weight; crosslinkable polyvinyl chloride resin: 10 to 10 parts by weight. 50 parts by weight, primary plasticizer: 10 to 50 parts by weight, oil-resistant polyester plasticizer: 80 to 40 parts by weight,
Thermosetting plasticizer: 10 to 40 parts by weight, catalyst: 0.3 to 1
Parts by weight, stabilizer: 2-3 parts by weight, crosslinking agent: 0.5-3 parts by weight, pigment: 0-2 parts by weight.

The slush molded shoe according to the method of the present invention is
Since all or part of the shoe sole and the lower part of the shoe main body are composed of a heat-gelated substance of plastisol in which a crosslinkable polyvinyl chloride resin, a thermosetting plasticizer and an oil resistant plasticizer are mixed, the shoe sole and the main body of the shoe are crosslinked. The heat resistance of the lower part is improved, it becomes difficult to melt even under heating conditions, and the cigarette resistance (heat distortion resistance) is improved. Further, the cross-linking also improves the strength and wear resistance of the sole and the lower part of the shoe main body.

Further, since the oil-resistant plasticizer is mixed, the oil resistance and chemical resistance of the shoe sole and the lower part of the shoe body are also improved.

If plastisol mixed with a crosslinkable polyvinyl chloride resin, a thermosetting plasticizer and an oil resistant plasticizer is injected up to the upper end of the slush molding mold to crosslink it, the slush molding mold will be crosslinked. It becomes difficult to peel off from the mold and the mold release property is significantly reduced, making mass production difficult.However, here it is recommended to use a plastisol mixed with a crosslinkable polyvinyl chloride resin, a thermosetting plasticizer and an oil resistant plasticizer for the sole of the shoe. All or part and only the lower part of the shoe body where mixing with the ungelled plastisol occurs, so the demolding property does not deteriorate so much, and expensive crosslinkable polyvinyl chloride resin, thermosetting plasticizer and oil resistant Since the use amount of plastisol mixed with a plasticizer can be suppressed to a necessary minimum, an increase in manufacturing cost can be suppressed. (Example 13)

[0195]

[Table 13]

First, as a plastisol for shoe soles, Table 13
The plastisol for the first layer having the composition shown in FIG.
mm injection, and while heating the mold at 150 ° C. for 1 to 2 minutes, a semi-gelled layer was formed on the entire shoe sole to leave ungelled plastisol.

Next, with the plastisol for the first layer remaining, according to the formulation in Table 13 above, plastisol for the second layer was poured all the way to the upper end of the slush molding mold to the bottom of the shoe body. Mixture of plastisols for the first layer and the second layer Plastisols are formed at 180 ° C.
After heating for 1 to 2 minutes to deposit the mixed semi-gelated layer and semi-gelated layer having a desired thickness on the entire inner surface of the mold, the ungelled plastisol was discharged.

Further, in order to form the heel portion, a plastisol mixed with a polyvinyl chloride resin for the heel portion is injected and filled in the heel portion in accordance with the composition shown in Table 13 above.
The mixture was heated at 5 ° C for 5 to 7 minutes to sufficiently crosslink the first layer and to sufficiently gel the second layer and the heel portion.

After cooling, the slush molded shoe was taken out from the slush molded mold to obtain a slush molded shoe in which both the shoe sole and the shoe body were black.

On the other hand, a plastisol containing no crosslinkable polyvinyl chloride resin, a thermosetting plasticizer and an oil-resistant plasticizer is used for the first layer, and a step of discharging the ungelled plastisol of the plastisol for the sole is added. A slush-molded shoe of Comparative Example was manufactured under exactly the same conditions except the above.

The strength, abrasion resistance, cigarette resistance (heat resistance), and oil resistance and chemical resistance of the sole and the lower part of the shoe body of these two slush-molded shoes were measured in the same manner as above by the measuring method described above. evaluated.

Table 14 collectively shows these measurement results. The slush molded shoe molded according to the present invention is particularly excellent in heat deformation resistance (cigarette resistance) at the sole and the lower part of the shoe body, and has improved tensile strength, abrasion resistance, oil resistance and chemical resistance. It can be seen that various characteristics of the shoe sole and the lower part of the shoe main body are improved as compared with the two-layer slush molded shoe of FIG.

[0203]

[Table 14]

Example 14 In order to confirm the improvement of the slip resistance, as shown in Table 13, a crosslinkable polyvinyl chloride resin, a thermosetting plasticizer and a raw material for the sole used in Example 13 were used. A slush molded shoe was manufactured by the manufacturing method of the present invention in exactly the same manner as in Example 13 by mixing whiskers (manufactured by Shikoku Kasei Co., Ltd.) as a slip-proof material with plastisol mixed with an oil resistant plasticizer.

With respect to the slush molded shoes thus obtained, the slip resistance was evaluated in the same manner as above by the measuring method described above.

The results are shown in Table 14. In addition to the results of Example 13, it can be seen that the slush molded shoe produced by the manufacturing method of the present invention is excellent in slip resistance in addition to the effects of Example 13.

(Example 15) To confirm that the oil resistance changes from the sole of the shoe to the upper part of the shoe main body,
A mold having a capacity of about 2400 cc was used as a mold. First, as a plastisol for the sole of the shoe, 2 plastisols mixed with the oil-resistant plasticizer for the first layer having the composition shown in Table 5 were used.
00cc to make a height of about 20mm including the bottom design of the shoe bottom in the mold, and 1-2 at 150 ° C.
While the mold was being heated for a minute, a semi-gelled layer was formed on the entire bottom of the shoe, leaving the ungelled plastisol.

Next, with the plastisol for the first layer remaining, according to the composition in Table 5, 2000 cc of plastisol for the second layer was injected to fill the upper end of the mold to the bottom of the shoe body. With the mixed plastisol for the first layer and the second layer, the mold is heated at 180 ° C. for 1 to 2 minutes to form a mixed semi-gelled mixture having a desired thickness on the inner surface of the slush molding mold. After depositing the layer and the semi-gelled layer, the ungelled plastisol was drained.

Further, in order to form the heel portion, plastisol mixed with polyvinyl chloride resin for the heel portion was poured into the heel portion and filled at 200 ° C. according to the composition of Table 5 above.
By heating for 5 to 7 minutes, the first layer was sufficiently crosslinked and the second layer and the heel portion were sufficiently gelated.

After cooling, the slush molding shoe was taken out from the slush molding mold to obtain a slush molding shoe according to the method of the present invention in which both the shoe sole and the shoe body were black.

The oil resistance of the shoe bottom and the lower part of the shoe body of the obtained slush-molded shoe was measured by the method already described, and the four measurement points a, b, and b shown in FIG.
C, the height from the sole of the shoe is 0mm, 50mm, 100mm,
The measurement was performed at 200 mm, and the results are shown in Table 15.

As is clear from the table, the slush molded shoe molded according to the present invention has the highest oil resistance (weight loss%) at the sole, and the oil resistance decreases as it goes upward from the sole. It was confirmed that the oil resistance gradually changed.

[0213]

[Table 15]

[0214]

[0215]

As described above, the first aspect of the present invention is as follows.
According to the method for producing a slush molded shoe having a multilayer structure as described above, after plastisol mixed with a polyvinyl chloride resin is injected into the shoe sole of the slush molding mold in an amount equal to or more than the amount required for molding the shoe sole, Since the semi-gelled layer was formed by heating the sole of the mold and leaving the ungelled plastisol, even if the sole of the shoe is uneven due to the injection of more plastisol than the amount required to mold the sole. A semi-gelled layer having a thickness can be deposited.

The plastisol for the shoe body was injected into the remaining ungelled plastisol so that the shoe body was slush-molded. Therefore, only the plastisol for the shoe body was gradually mixed from the portion where the two plastisols were mixed and the two were in contact with each other. The concentration changes in the part, and the semi-gelated layer of the shoe body can be formed through the mixed semi-gelated layer.

As a result, the functions of the shoe sole and the shoe body can be gradually changed or can be clearly distinguished.

According to the method for producing a slush-molded shoe having a multilayer structure according to claim 2 of the present invention, at least one of the injection amount of the plastisol for the sole and the amount of the ungelled plastisol remaining (each Both are adjusted so that the amount of ungelled plastisol left and the mixing ratio will change depending on the amount of ungelled plastisol left over. For example, the mixed semi-gelated layer is hardly formed and the functions of the shoe sole and the shoe body can be clearly distinguished. The function with the shoe body can be changed gradually.

Further, according to the method for producing a slush-molded shoe having multiple layers according to claim 3 of the present invention, a general composition of plastisol mixed with a polyvinyl chloride resin used for the sole of a normal slush-molded shoe is used. Replacement, cross-linkable polyvinyl chloride resin, thermosetting plasticizer, oil-resistant plasticizer 3
Any one of them, or a combination of two or more, is used. Therefore, in any of these, the strength of the shoe sole and the lower part of the shoe body, wear resistance, heat deformation resistance, and oil / chemical resistance Can be improved overall.

According to the method for producing a slush-molded shoe having multiple layers according to claim 4 of the present invention, the various plastisols according to claim 3 are further mixed with an anti-slip material. In addition to performance, slip resistance can be further improved.

[Brief description of drawings]

FIG. 1 is a process diagram in a case where the method for producing a slush-molded shoe of the present invention is applied to the production of a two-layer slush-molded shoe.

FIG. 2 is a cross-sectional view of a mixed plastisol produced state and a cross-sectional view of a slush shoe when the method for producing a multi-layered slush molded shoe of the present invention is applied to the production of a two-layer slush molded shoe.

FIG. 3 is a cross-sectional view of a slush molded shoe according to a conventional manufacturing method.

FIG. 4 is a cross-sectional view and an external view of a slash-formed shoe according to a conventional manufacturing method.

FIG. 5 is a cross-sectional view of a slush molded shoe according to a conventional manufacturing method.

[Explanation of symbols]

 1 Slush molding mold (mold) 2 Sole bottom (first layer) 2a Sole toe 2b Sole tread 2c Footless tread 2d Sole heel 3 Sole plastisol 4 Half gel Layer (shoe bottom) 5 Ungelled plastisol 6 Plastisol for shoe body 7 Plastisol mixing part 8 Shoe body (second layer) 9 Heel part (heel part) 10 Mixed semi-gel layer (lower part of shoe body) 11 Half gel Chemical layer (upper part of shoe body) 12 Healing plastisol 13 Skin (slush molded body) a, b, c, d Oil resistance measurement point

Claims (4)

[Claims] 1. A slush molding mold is injected with a shoe sole plastisol mixed with a polyvinyl chloride resin in an amount not less than that required for molding the slush molding mold, and the slush molding mold is then heated to obtain an ungelled gel. The plastisol for the shoe body is mixed with polyvinyl chloride resin different from the plastisol for the sole of the shoe, and the semi-gelated layer is layered along the shape of the sole with the plastisol remaining to be heated, and the sole is heated. The non-gelled plastisol and the plastisol for the shoe body are mixed to form a semi-gelated layer of the shoe body, and then the ungelled plastisol is discharged and heat-gelled. Of manufacturing a slush molded shoe having multiple layers. 2. The mixture of the plastisol for the sole and the plastisol for the shoe main body by changing at least one of an injection amount of the plastisol for the sole and an amount of residual ungelled plastisol of the plastisol for the sole. The method for producing a slush molded shoe having a multilayer structure according to claim 1, wherein the film forming range and the mixing ratio of the semi-gelated layer are changed. 3. A plastisol for a sole mixed with a polyvinyl chloride resin to be injected into the slush molding mold, and any one of three of a crosslinkable polyvinyl chloride resin, a thermosetting plasticizer, and an oil resistant plasticizer, or The method for producing a slush-molded shoe having multiple layers according to claim 1 or 2, wherein two or more are used in combination. 4. A multi-layered slush molded shoe according to claim 3, wherein the shoe sole plastisol mixed with polyvinyl chloride resin to be injected into the slush molding mold is further mixed with an anti-slip material. Production method.