JP2589250B2 - Injection molded shoes manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing an injection-molded cloth shoe obtained by subjecting a cover material formed by laminating cloth to a water-repellent and stain-proofing process. The present invention relates to a method for producing an injection-molded cloth shoe capable of securing a strong bonding state with a bottom and bonding and integrating the same, and maintaining water-repellent and stainproof properties for a long period of time.

[0002]

2. Description of the Related Art In general, in order to manufacture cloth shoes by an injection molding method, a mold formed by suspending a cover formed by laminating cloth in a last mold, and matching a bottom mold and a side mold to the last mold. A method of injecting a sole material mainly composed of a thermoplastic resin into the cavity to form the sole and simultaneously bond and integrate the sole with the above-mentioned cover is adopted. However, the outer cloth of the shell and the sole material originally lack adhesiveness, so that it was necessary to use the following method together in order to firmly adhere the two.

Method (1): A solvent-based polyurethane-based adhesive, polyester-based adhesive, or the like is brush-coated on the outer cloth of the upper at the portion where the upper and the shoe sole to be injection-molded adhere to each other. After drying (so-called partial coating of an adhesive), the sole material is injected, and the sole is bonded and integrated with the adhesive.

Method (2): As shown in JP-B-58-29081, JP-B-3-20241, etc., a hot-melt type polyurethane-based treatment is applied to the cover cloth at the stage of raw material. Agent, polyester processing agent 30-50
Cut and sew the whole surface treated with a gravure roll of mesh or coated with a knife coater etc. to form a cover, and at the same time mold the shoe sole by injection molding, at the same time as the sole with these treatment agents on the top cloth Adhesively integrates with the shell.

[0005] Therefore, in order to manufacture a water-repellent and stain-resistant injection-molded shoe, after the injection molding step using both the methods (1) and (2) is completed, the surface of the cover is brushed or sprayed with a water-repellent agent. It has to be dealt with by applying such a method. However, a polyurethane-based or polyester-based adhesive or treating agent is applied to the surface of the shell by the methods (1) and (2), and the water-repellent agent adheres to the adhesive or treating agent. Because the nature is not enough, wash the shoes about once or twice,
There is a problem that the water-repellent and stainproof properties are reduced or disappear.

[0006] A technique of treating the outer cloth of the shell with a water-repellent agent at the stage of raw fabric is also conceivable. However, as described above, the adhesion between the water repellent and the polyurethane-based or polyester-based adhesive or treatment agent by the methods (1) and (2) is not sufficient. The adhesive strength to the cap is extremely reduced, and it is impossible or extremely difficult to manufacture an injection-molded shoe having excellent durability and excellent water-repellent and antifouling properties over a long period of time.

Further, it is conceivable to develop a water-repellent agent having sufficient adhesiveness to a polyurethane-based or polyester-based adhesive or treating agent, but this development requires a great deal of cost and time. However, it cannot be said that development of a water repellent having desired characteristics can be surely performed.

By the way, the present inventors have previously described (1),
The disadvantage of the method (2), that is, in the method (1), the adhesive protrudes from a predetermined bonding portion to degrade the appearance quality, and the workability and productivity are poor due to mainly manual work. In the method (2), the woven structure and the knitted structure of the cloth are hardened by the resin component of the treatment agent, and the texture of the cloth is hardened. Lack of the original tactile sensation, especially brushed materials and materials with a brushed feeling are practically unusable, and the color of the material shifts to the darker side, blurs, etc. In order not to make use of it, and also to cure the shell with the treatment agent, it is difficult to suspend the shell into the last mold, and it is impossible or extremely difficult to fit it. Injection molding using soles of special composition We propose a method of manufacturing (Japanese Patent Application No. 3-309839).

According to the previously proposed method, a shell material formed by laminating cloths can be formed without performing the methods (1) and (2).
Just by hanging it on the last mold and injection molding the sole material, it is possible to secure sufficient bonding strength between the upper and the sole, and it is excellent in durability and does not have the above various disadvantages. Injection molded shoes can be obtained.

[0010]

SUMMARY OF THE INVENTION The object of the present invention is to produce an injection-molded shoe which can maintain the above-mentioned excellent water-repellent and antifouling properties over a long period of time and also has an excellent durability based on the technology proposed earlier. The purpose is to provide a method that can

[0011]

SUMMARY OF THE INVENTION That is, according to the shoe sole material of the special composition proposed previously, a strong bonding state is realized with a shell material formed by laminating cloths not subjected to the methods (1) and (2). Therefore, on the shell material, at the stage of raw fabric, or after cutting or sewing,
The treatment with a commercially available water repellent can be performed well. Therefore, if the sole material of the previously proposed special composition is injection-molded on a shell material previously treated with a water-repellent agent, excellent water-repellent and stainproof properties can be maintained for a long period of time, and excellent durability can be achieved. It is possible to provide an injection-molded shoe having both properties.

The present invention has been made under such technical recognition, and is made by injection-molding a sole material mainly composed of a thermoplastic resin, and bonding and integrating with a cap made of laminated cloth. In the method for producing an injection-molded cloth shoe, the cover is treated with a fluorine-based water repellent, and the sole material is a thermoplastic polyurethane elastomer based on 100 parts by weight of an ethylene-vinyl chloride copolymer. 5 to 50 parts by weight and plasticizer 8
0 to 120 parts by weight, and the melt viscosity during injection molding is 1
190 mm high-profile type flow tester for splitting dies
10 ° C., 10 kg load, 10 ² to 10 ⁴ g / cm ·
sec.

Further, according to the present invention, the cover cloth treated with the above-mentioned fluorine-based water repellent has a pore volume ratio specified in JISL-1096 of 50 to 90% and is treated with an adhesive. It is also characterized by the absence.

Further, the present invention is characterized in that the thermoplastic polyurethane elastomer is a hot-melt polyurethane elastomer having a polyester skeleton and a molecular weight of 10 ⁴ to 10 ⁵ .

The cover in the present invention is formed by laminating a cloth, for example, by laminating a front cloth and a back cloth via an adhesive, or a soft foam foamed between the front cloth and the back cloth. Those laminated with polyurethane foam sandwiched (in this case,
Laminating via an adhesive or laminating by heating and melting the surface of a flexible polyurethane foam), woven or non-woven fabric as a reinforcing material between the front and back cloths and via the adhesive There are laminated ones, and one in which the top cloth and the back cloth are stacked in a free state without bonding.

According to the present invention, in the shell having such a configuration, only the front cloth may be treated with the fluorine-based water repellent, or the back cloth may be sandwiched between the front cloth and the back cloth. The above-mentioned various materials may also be those treated with a fluorine-based water repellent, but in practice, sufficient water repellency and stain resistance can be obtained only by treating the surface cloth. The timing of processing
It may be performed at the stage of the raw cloth of the front cloth and back cloth, or after cutting,
Alternatively, it can be performed at the stage after sewing into the form of a shell, but there is a cost advantage to perform at the stage of the web.

The above fluorine-based water repellents are commercially available, for example, “Dickguard” (trade name, manufactured by Dainippon Ink Co., Ltd.), “Scotchguard” (trade name, manufactured by Sumitomo 3M Limited), “Asahi Glass Co., Ltd. (Asahi Glass Co., Ltd.)” Guard "etc. can be used favorably. These water repellents are used after being diluted with water. If the degree of dilution at this time is too high (the concentration of the water repellent is too low), a plurality of treatment steps are required to obtain a desired water repellent / antifouling effect, and the production efficiency is reduced. Conversely, if it is too low (the concentration of the water repellent is too high), the adhesiveness between the upper cover material and the sole material is reduced. Therefore, in the present invention, the fluorine-based water repellent / water = 1 to 10/1
It is suitable to use in the range of 00 (weight ratio), preferably in the range of fluorine-based water repellent / water = 2 to 5/100 (weight ratio).

As the water repellent for the cap, in addition to the above-mentioned fluorine-based water repellents, silicon resin-based or zirconium salt-based water-repellents are generally used. When an agent is used, for example, in the case of a silicone resin-based material, the adhesion between the upper cover material and the shoe sole material is hindered, and sufficient adhesive strength may not be obtained.In the case of the zirconium salt-based material, the durability is inferior. It adopts a fluorine-based water repellent.

The above-mentioned fluorine-based water repellents include nonionic, anionic and cationic surfactants in order to increase the permeability of the water-repellent to the cloth constituting the shell. A small amount of alcohol or the like (specifically, about 0.01 to 10% by weight of the total amount of the fluorine-based water repellent and water) can also be blended.

On the other hand, the ethylene-vinyl chloride copolymer constituting the sole material of the present invention differs from the vinyl chloride homopolymer generally used for injection-molded shoe soles in that ethylene is copolymerized. Copolymerization rate is 0.5-1
0%, preferably in the range of 0.8 to 5% can be used. The copolymerization of ethylene lowers the viscosity of polyvinyl chloride when melted, significantly improves the flow characteristics during injection, and penetrates into the pores of the outer fabric of the shell treated with the fluorine-based water repellent To facilitate bonding and integration with the shell,
If the copolymerization ratio of ethylene is less than 0.5%, the flow characteristics at the time of injection deteriorate, and if it exceeds 10%, the inherent characteristics of the vinyl chloride resin are greatly reduced, making the material unsuitable as shoe sole materials.

The degree of polymerization of the ethylene-vinyl chloride copolymer in the present invention can be any one as long as it is within a range generally used as a sole material, but is preferably 800 to 4000, more preferably an average degree of polymerization. The average degree of polymerization is preferably from 1000 to 2500. When the average degree of polymerization of the ethylene-vinyl chloride copolymer changes, the viscosity at the time of melting also changes.However, when the average degree of polymerization is less than 800, the melt viscosity decreases, the flow characteristics at the time of injection become good, and Easily penetrates into the pores of the outer cloth of the shell treated with the water repellent,
While it facilitates the bonding and integration with the cap, the physical properties of the shoe sole material are reduced, and the shoe sole cannot be put to practical use. Conversely, if the average degree of polymerization exceeds 4000,
Although the physical properties of the shoe sole material are improved, the melt viscosity is high, the flow characteristics at the time of injection are deteriorated, and it becomes difficult to bond and integrate with the cap treated with the fluorine-based water repellent.

The thermoplastic polyurethane elastomer blended with the above-mentioned ethylene-vinyl chloride copolymer comprises 1,4
-Polyalkylene diadipate represented by -butanediol adipate and 1,6-hexanediol adipate, and polycaprolactone obtained by ring-opening polymerization of ε-caprolactone; ethylene glycol, propylene glycol, neopentyl glycol; ,
1,3-butanediol, 1,4-butanediol,
Low molecular weight aliphatic glycols such as 1,5-pentanediol, low molecular weight alicyclic glycols represented by water-added bisphenol A, and organics such as ethylenediamine, propylenediamine, piperazine, isophoronediamine, and 4,4'-diaminodicyclohexylmethane Those obtained by using a chain extender such as a diamine as necessary and reacting with an aliphatic, alicyclic, or aromatic diisocyanate are used. As the diisocyanate, a non-yellowing aliphatic or alicyclic group or a yellowing type aromatic can be used depending on the required characteristics and color of the shoe sole.

The above-mentioned thermoplastic polyurethane elastomer has an ethylene-vinyl chloride copolymer 100 as a main component.
It is used in an amount of 5 to 50 parts by weight, preferably 8 to 30 parts by weight based on parts by weight. If the amount is less than 5 parts by weight, the sole is formed by injection of the sole material, and at the same time, the sole and the upper are bonded and integrated, that is, the sole and the upper treated with the fluorine-based water repellent. The effect of bonding is lost, and if it exceeds 50 parts by weight, the shoe sole material injected at the time of injection molding becomes extremely tacky, and sticks or adheres to the bottom mold or side mold, making the molding operation difficult.

In the present invention, preferably, the thermoplastic polyurethane elastomer is a hot melt having a polyester skeleton and a molecular weight in the range of 10 ⁴ to 10 ⁵ , more preferably 2 × 10 ^{4 to} 5 × 10 ^4. A type polyurethane elastomer is used. In this case, when the molecular weight is less than 10 ⁴ , the flow characteristics at the time of injection molding are good, but the adhesive force between the sole of the injection molded shoe and the upper cloth treated with the fluorine-based water repellent decreases, and the object of the present invention is No longer matches
10 flow properties during injection and ⁵ more than decreases, also the adhesive properties of the injection-molded sole and該胛skin is reduced.

In the present invention, the following method can be adopted as a method for adding and blending the above-mentioned thermoplastic polyurethane elastomer to the shoe sole material composition for injection molding.
It is not limited to these. (1) A thermoplastic polyurethane elastomer is blended with other compounding components, and pelletized as a full compound. (2) The thermoplastic polyurethane elastomer is ethylene-
A vinyl chloride copolymer, a plasticizer, and the like are mixed at a high concentration in advance (that is, a master batch is prepared), and a required amount is added to the shoe sole compound. (3) The thermoplastic polyurethane elastomer is refined and powdered, added to the shoe sole compound, and used in a powder state without being pelletized.

The plasticizer to be added to the ethylene-vinyl chloride copolymer and the thermoplastic polyurethane elastomer can be any of those used in the usual compounding of polyvinyl chloride resin. For example, phthalic acid derivatives such as dibutyl phthalate and dioctyl phthalate, adipic acid derivatives such as dioctyl adipate, isophthalic acid derivatives, tetrahydrophthalic acid derivatives, azelaic acid derivatives, sebacic acid derivatives, maleic acid derivatives, and fumaric acid Derivatives, trimellitic acid derivatives, citric acid derivatives, itaconic acid derivatives, oleic acid derivatives, linoleic acid derivatives, stearic acid derivatives,
Phosphoric acid derivatives, glycol derivatives, glycerin derivatives,
Examples include, but are not limited to, paraffin derivatives.

In the present invention, in addition to the above-mentioned ethylene-vinyl chloride copolymer, thermoplastic polyurethane elastomer and plasticizer, a stabilizer, a pyrolytic foaming agent, a filler, a pigment and other appropriate additives are blended. can do. As the stabilizer, a barium / zinc-based stabilizer can be preferably used. As the barium / zinc-based stabilizer, any barium / zinc-based stabilizer can be used as long as it is used for a polyvinyl chloride resin. Absent. The barium / zinc-based stabilizer is a stabilizer that has little effect on the durability of the above-mentioned thermoplastic polyurethane elastomer, that is, the physical properties such as hydrolysis resistance, and also functions as a decomposition catalyst of a pyrolysis-type foaming agent described later. Things. Epoxy resin, epoxidized soybean oil,
Phosphates, phosphites, antioxidants, ultraviolet absorbers, and stabilizers such as calcium hydroxide, magnesium oxide, and calcium oxide can be used together, but they affect the durability (hydrolysis resistance) of thermoplastic polyurethane elastomers It is not preferable to use a material such as an organic tin type or an organic lead type.

The sole material containing the above components has a melt viscosity at the time of injection molding of 10 ² to 10 ⁴ g / cm.
・ Sec (Koka flow tester, 190 ℃, 10kg
(Load, 1 mm split die) is important. The melt viscosity at the time of injection molding is such that the shoe sole is molded by injection molding of the shoe sole material, and at the same time, the shoe sole is bonded to a cap, which is made by laminating a cloth and treated with a fluorine-based water repellent. This is the most important factor for integration. More specifically, the shoe sole material within the above-mentioned melt viscosity range penetrates into the grain and the fiber gap of the upper cover cloth treated with the fluorine-based water repellent at the time of injection molding, and the shoe sole and the upper are removed. Achieves the most important anchor effect for bonding and integration with the fabric, promotes wetting with the fiber surface, and synergizes with the bonding effect of the thermoplastic polyurethane elastomer, which is a component of the sole material. By action, stronger bonding is realized.

The above melt viscosity is 10 ² g / cm · sec.
If it is less than the above, the shoe sole material composition melted at the time of injection molding is likely to leak as burrs from the mold fitting portion and the mold rubbing portion, making the injection molding operation difficult and making stable foam injection molding difficult. In addition, 10 ⁴ g / cm
・ If the time exceeds sec, it becomes difficult for the injected shoe sole material composition to efficiently penetrate into the grain and the fiber gap of the shoe upper fabric treated with the fluorine-based water repellent, and the shoe sole material and the shoe upper are bonded. An important anchoring effect cannot be realized for integration, and the fiber surface is not sufficiently wetted, and the effect of the thermoplastic polyurethane elastomer, which is a component of the sole material, cannot be sufficiently exhibited. Become.

In the present invention, the above-mentioned shoe sole material composition can be preferably applied to a top cover cloth (meaning a cloth on the surface of the top, and when a large number of cloths are stacked and laminated, At least the uppermost layer cloth) is treated with the above-mentioned fluorine-based water repellent, but is not treated with an adhesive, and has a pore volume ratio defined by JISL-1096 of 50 to 50. It is in the range of 90%.
As the surface cloth, cotton, soup, acrylic fiber, polyester fiber, nylon fiber, and blended, mixed woven, knitted, and nonwoven fabrics generally used for shoes can be used. In order to enhance the above-mentioned anchor effect,
Among the synthetic fibers, woven fabric, knitted fabric, and nonwoven fabric made of short fibers and staple fibers are preferable to filament fibers. The pore volume ratio defined in JISL-1096 can be represented by the following equation.

[0031]

(Equation 1)

The pore volume ratio of the outer cloth of the shell is 50 to 90%.
In this range, the melted material of the sole material at the time of the above-mentioned injection efficiently penetrates into the texture and the fiber gap of the upper cover fabric, and is an important anchor for bonding and integrating the sole and the upper cover. (Anchor) effect is realized, and furthermore, it facilitates the wetting with the fiber surface, makes it easier to exhibit the bonding effect of the thermoplastic polyurethane elastomer which is a component of the sole material, and easily realizes strong bonding and integration. .

If the pore volume ratio is less than 50%, the melted material of the sole material at the time of injection cannot efficiently penetrate into the meshes and fiber gaps of the outer cover fabric, and the sole material and the upper cover are bonded and integrated. It becomes difficult. On the other hand, if the pore volume ratio exceeds 90%, the physical properties of the outer cloth of the shell become unsuitable for shoes, making it substantially impossible to manufacture shoes.

[0034]

The present invention will be described below with reference to examples, but the present invention is not limited to these examples. Example 1 (1) Preparation of a cap A plain cotton woven cloth having a structure of (20/2 × 16/3) / (70 × 24) and a pore volume ratio of 68% was used as a table cloth.
After immersion (dip) in the fluorine-based water repellent put into the dipping tank, squeezing (nipping) between the rubber rolls, dip again, and perform 2-dip, 2-nip processing called nip And hot-air drying at 120 to 140 ° C. for about 1 minute, and further curing at 180 ° C. for 1 minute.

[0035]

[Table 1]

A raw fabric was produced by laminating a water-repellent / fouling-resistant surface cloth as described above with a solvent-based natural rubber using a woven fabric of suft twill as a backing cloth. After cutting and sewing the raw material, the insole material was joined to obtain a bag-shaped shell covering commonly called California shell.

(2) Composition of shoe sole material for injection molding As a thermoplastic polyurethane elastomer, a polyurethane elastomer pellet having an average molecular weight of 4 × 10 ⁴ comprising polyhexane adipate, 1,4-butanediol, and hexamethylene diisocyanate was used as a mass. Obtained legally. Injection-molded shoe sole material obtained by compounding the injection-molded shoe sole material composition using the elastomer by the dry blending method with the composition shown in Table 2, kneading with a banbury, and pelletizing with a single-screw extruder using a hot-cut method. I got the compound. The melt viscosity of this compound at 190 ° C. was 9 × 10 ² g / cm · sec (Koka type flow tester, 10 kg load, 1 mm split die).
This was consistent with the object of the present invention.

[0038]

[Table 2]

(3) Shoemaking The upper obtained in the above (1) was suspended in a last mold, and a side mold and a bottom mold were adapted to the last mold to form a shoe sole forming cavity. In the cavity, the injection-molded shoe sole material compound obtained in the above (2) was injected with an injection molding machine at an injection temperature of 190 ° C.
At the same time, the shoe sole was formed on the shell (ie, the shell and the shoe sole were bonded and integrated), and after cooling, a shoe product was obtained.

Since the shoe product manufactured in this manner has not been subjected to the adhesive treatment of the upper cover cloth which has been conventionally performed, not only the texture of the upper cover cloth but also the color development properties are good. Not only that, but the shell fits well with the last mold, and the finish as a shoe was good and beautiful. In addition, the adhesive strength between the upper and the sole is 3.5 kg / cm.
There was no problem as a shoe at all.

The above shoe products were washed in a commercially available washing machine for 10 minutes in detergent and 5 minutes in water with one wash as shown in Table 3, and the water repellency and stain resistance were examined each time. Are shown in Table 3. For comparison, the injection-molded shoe sole material compound obtained in (2) was injected in the shoe-making process in (3) without performing the water-repellent and antifouling treatment in (1) above at the stage of the raw fabric of the surface cloth. Then, the shoe sole molded and adhered to the upper at the same time as the upper is adhered and integrated, and the upper of the shoe product obtained by cooling is sprayed with a fluorine-based water repellent having the composition shown in Table 1 in the same manner as described above. After washing, water repellency and stain resistance were examined. The results are shown in Table 3.

The water-repellent and antifouling properties shown in Table 3 are based on JISL-1.
The water repellency was measured according to the water repellency test of No. 092, and those showing no wet state on any of the cover surfaces were marked with ○, and those showing a wet state on an area equal to or less than 1/2 of the surface area of the cover. The evaluation was evaluated as “Δ”, and the evaluation indicating “wet” in an area of １ ／ or more of the surface area of the shell was evaluated as “X”.

[0043]

[Table 3]

Example 2 (1) Preparation of a shell A plain cotton woven cloth having a texture of (10/2 × 10/2) / (45 × 34) and a pore volume ratio of 73% was used as a top cloth. After performing the water-repellent and antifouling treatment in the same manner as in Example 1, a composite material obtained by laminating a urethane foam (thickness: 3 mm) and a nylon tricot half on one side is used as a backing material, and a solvent-based natural rubber bonding paste (weight per unit area: 400 g / m ²⁾ ), Dried, and then vulcanized to obtain a laminated raw material for a shell. After cutting and sewing this material, the insole was joined to obtain a bag-shaped shell covering commonly called California shell.

(2) Composition of shoe sole material for injection molding As a thermoplastic polyurethane elastomer, a polyurethane elastomer composed of polycaprolactone, 1,4-butanediol and isophorone diisocyanate having an average molecular weight of 6 × 10 ⁴ was produced by a melt polymerization method. , After desolvation,
A flaky elastomer was obtained. Injection-molded shoe sole material obtained by compounding the injection-molded shoe sole material composition using the elastomer by the dry blending method with the composition shown in Table 2, kneading with a banbury, and pelletizing with a single-screw extruder using a hot-cut method. I got the compound. The melt viscosity of this compound at 190 ° C. is 3 × 10 ³ g /
cm · sec (Koka type flow tester, 10kg load,
1 mm split die).

[0046]

[Table 4]

(3) Shoemaking A shoe product was obtained in the same manner as in Example 1 using the upper obtained in the above (1) and the shoe sole material composition for injection molding in the above (2).

Since the shoe products manufactured in this manner have not been subjected to the surface treatment of the upper cover cloth which has been conventionally performed, not only the texture of the upper cover but also the color development properties are good. The shell fitted well to the last mold, and the finish as shoes was beautiful. In addition, the adhesive strength between the upper cover and the injection-molded shoe sole was 3.3 kg / cm, which was a good strength for a shoe, which met the object of the present invention.

The above-mentioned shoe products were washed in the same manner as in Example 1 and examined for water repellency and stain resistance. As a result, the same results as in Example 1 in Table 3 were obtained. For comparison, the injection-molded shoe sole material compound obtained in (2) was used without performing the water-repellent and antifouling treatment in (1) above at the stage of the raw fabric of the outer cloth.
In the shoe making process of the above (3), the fluorine-based water repellent having the composition shown in Table 1 was applied to the shoe cover part of the shoe product obtained by injecting, molding the shoe sole, bonding and integrating the shoe sole, and cooling. Regarding the spray-treated one, washing was carried out in the same manner as described above, and the water-repellent and stain-proof properties were examined.

[0050]

As described in detail above, the present invention provides a technique proposed in the prior art, that is, a method of producing an injection-molded shoe without applying an adhesive to the upper cover cloth or performing a surface treatment with the adhesive. Water-repellent and soil-repellent with a commercially available fluorine-based water repellent at the stage of the raw material of the shell, based on the technology that enables the bonding and integration between the shell and the injection-molded shoe sole, which is the most important in manufacturing technology. Since it can be processed, it is possible to produce an injection-molded shoe that has high durability and good water repellency and stain resistance, and also has excellent durability.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification number Office reference number FI Technical display location B29D 31/50 // B29K 27:06 B29L 31:50

Claims (3)

(57) [Claims] 1. A method for producing an injection-molded cloth shoe in which a shoe sole material containing a thermoplastic resin as a main component is injection-molded and bonded and integrated with a shell formed by laminating a cloth. What was treated with a liquid agent, wherein the sole material contains 5 to 50 parts by weight of a thermoplastic polyurethane elastomer and 80 to 120 parts by weight of a plasticizer with respect to 100 parts by weight of an ethylene-vinyl chloride copolymer, The melt viscosity at the time of injection molding is 190 ° C. and 10 kg load with a 1 mm split die using a Koka type flow tester.
A method for producing an injection-molded cloth shoe, which is 10 ² to 10 ⁴ g / cm · sec. 2. The outer fabric of a shell treated with a fluorine-based water repellent has a pore volume ratio of 50 specified in JISL-1096.
The method for producing an injection-molded cloth shoe according to claim 1, characterized in that it is not more than 90% and is not treated with an adhesive. 3. The thermoplastic polyurethane elastomer according to claim 1,
The method for producing an injection-molded cloth shoe according to claim 1 or 2, wherein the hot-melt polyurethane elastomer has a polyester skeleton and a molecular weight of 10 ⁴ to 10 ⁵ .