CN111358116A - Reinforced popcorn sole - Google Patents

Abstract

The invention relates to an enhanced popcorn shoe sole, which comprises a shoe sole body formed by combining expanded thermoplastic particles and a reinforcing part compounded on the shoe sole body, wherein the shoe sole body is provided with an upper surface, a lower surface and a side surface formed between the upper surface and the lower surface, the reinforcing part is provided with a shaping hole capable of carrying out plastic compression on the single expanded thermoplastic particle, the hardness of the reinforcing part is greater than that of the shoe sole body, the thickness of the shaping part is 0.5-2.5 mm, the reinforcing part and the expanded thermoplastic particles are bonded together in a heating mode, and the expanded thermoplastic particles at the lower surface of the shoe sole body are embedded into the shaping hole. The invention has the advantages of good wear resistance, good support property and good stability.

Description

Reinforced popcorn sole

technical field

The invention relates to a reinforced popcorn sole.

Background technique

In the field of shoe materials, popcorn soles refer to soles processed with expanded thermoplastic particles (currently, expanded thermoplastic polyurethane, or ETPU, also called expanded TPU) particles in the industry. The popcorn sole has many advantages such as soft texture, good elasticity, good cushioning performance, low energy consumption under pressure, good durability, and good thermal insulation performance. The common processing method of the current popcorn sole is to place the expandable thermoplastic particles in a mold, and then steam is fed into the mold to bond the expandable thermoplastic particles together to form a midsole. However, at present, this kind of midsole has relatively poor wear resistance and cannot be used directly on the ground. If it is directly scratched with the ground, the expanded thermoplastic polyurethane particles are easily scratched or even fall off. Paste a layer of outsole, the outsole is usually a rubber sheet, and the rubber sheet has good wear resistance. However, the addition of the outsole makes the weight of the entire sole increase, the elasticity and softness become poor, and also increases the operation process and The associated material costs and the environmental impact of the extensive use of rubber materials.

In view of this, the inventor of this case has conducted in-depth research on the above-mentioned problems, and this case came into being.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a reinforced popcorn sole with good wear resistance and good stability.

In order to achieve the above object, the present invention adopts such technical scheme:

The reinforced popcorn sole includes a sole body combined with expanded thermoplastic particles and a reinforcing part compounded on the sole body, the sole body has an upper surface, a lower surface and a side surface formed between the upper surface and the lower surface, so the The reinforcing member is provided with a shaping hole that can plastically press a single expanded thermoplastic particle, the hardness of the reinforcing member is greater than the hardness of the sole body, and the thickness of the shaping member is 0.5 to 2.5 mm, so The reinforcing member and the expanded thermoplastic particles are thermally bonded together, and the expanded thermoplastic particles at the lower surface of the sole body are embedded in the shaping holes.

As a preferred mode of the present invention, the reinforcing member has a first composite area corresponding to the lower surface of the sole body.

As a preferred mode of the present invention, the Asker C hardness value of the sole body is 40 to 50C, and the hardness value of the reinforcing member is 75 to 95A on the Shore A hardness scale.

As a preferred mode of the present invention, there are a plurality of the shaping holes, the multiple shaping holes are all covered with the reinforcing member, and the shaping holes penetrate from the upper surface of the reinforcing member to the bottom surface.

As a preferred mode of the present invention, the heating mode is steam heating.

As a preferred mode of the present invention, the melting point of the reinforcing member is 130 to 150°C.

As a preferred mode of the present invention, the expanded thermoplastic particles are polyurethane expanded thermoplastic particles or nylon expanded thermoplastic particles or other thermoplastic foamed material particles.

As a preferred embodiment of the present invention, the reinforcing member is a non-foamed thermoplastic polyurethane or other non-foamed thermoplastic material.

As a preferred mode of the present invention, the expanded thermoplastic particles are spherical or ellipsoidal, the shaping holes are cylindrical holes, and the maximum diameter of the shaping holes is smaller than the maximum diameter of the expanded thermoplastic particles.

As a preferred mode of the present invention, the bonding strength between the sole body and the reinforcing member is ≥25 N/cm.

After adopting the technical solution of the present invention, the reinforcing member is provided with a shaping hole capable of plastic-compressing a single expanded thermoplastic particle, the expanded thermoplastic particle at the lower surface of the sole body is embedded in the shaping hole, and the reinforcing member and the expanded thermoplastic particle are embedded in the shaping hole. Bonded together by heating, the expanded thermoplastic particles soften and expand when heated, the expanded thermoplastic particles at the shaping pores are confined by the shaping pores and penetrate into the shaping pores during expansion, and the pressure and temperature occur more violently The expanded thermoplastic particles there can better bond with the surrounding expanded thermoplastic particles, improve the bonding fastness between the expanded thermoplastic particles, the expanded thermoplastic particles are not easy to disperse, and the expanded thermoplastic particles at the shaping holes are The particles are formed by pressurization to improve the strength of the expanded thermoplastic particles and make them more wear-resistant. The sole body is embedded in the molding hole of the reinforcing part, and the sole body is constrained into one by the reinforcing part with higher hardness. The integrity and stability of the sole are better. The sole of the present invention does not need to be provided with a rubber outsole like a traditional popcorn sole, and through the selection of the thickness of the reinforcing part and the setting of the shaping hole, the reinforcing part is made lighter, and the sole body is combined with the expanded thermoplastic particles. The entire sole maximizes the lightweight benefits of traditional popcorn soles.

Description of drawings

Figure 1 is a bottom view of the present invention.

FIG. 2 is a cross-sectional view at A-A in FIG. 1 .

FIG. 3 is a schematic structural diagram of a reinforcing member in the present invention.

FIG. 4 is a cross-sectional view at B-B in FIG. 3 .

In the picture:

Sole body 10 Expanded thermoplastic particles 11

upper surface 101 lower surface 102

Reinforcing parts 20 Molding holes 21

Detailed ways

In order to further explain the technical solutions of the present invention, detailed descriptions are given below with reference to the embodiments.

1 to 4, the reinforced popcorn sole includes a sole body 10 combined with expanded thermoplastic particles 11 and a reinforcing member 20 compounded on the sole body 10. The sole body 10 has an upper surface 101 and a lower surface 102. And the side formed between the upper surface 101 and the lower surface 102, the reinforcing member 20 is provided with a molding hole 21 capable of molding a single expanded thermoplastic particle 11. In the present invention, the single expanded thermoplastic particle 11 is in the The shaping hole 21 cannot be completely entered at normal temperature, that is, the size of the shaping hole 21 is smaller than the size of the expanded thermoplastic particles 11 . When the expanded thermoplastic particles 11 are heated and softened, the expanded thermoplastic particles 11 may be extruded into the shaping holes 21 . The hardness of the reinforcing part 20 is greater than the hardness of the sole body 10 , the thickness of the shaping part is 0.5 to 2.5 mm, and the reinforcing part 20 and the expanded thermoplastic particles 11 are bonded together by heating , In the present invention, the expanded thermoplastic particles 11 in the shoe-making industry are directly selected, which can be softened and bonded together when heated, without adding glue. The expanded thermoplastic particles 11 at the lower surface 102 of the sole body 10 are heated and softened and then enter the shaping holes 21 and are squeezed to a certain extent, so that the expanded thermoplastic particles 11 are embedded in the shaping holes of the reinforcing member 20 21. As a preferred mode of the present invention, the heating method is steam heating, which is a well-known method in the process of manufacturing popcorn soles. In the present invention, during manufacturing, a traditional mold is inserted to reinforce Part 20 (specifically, the reinforcing part 20 can be placed on the fixed mold, and the reinforcing part 20 is in the shape of a flat sheet), other operating conditions are conventional processes, the expanded thermoplastic particles 11 are heated and bonded together, and the expanded thermoplastic particles 11 enter forming holes 21 and bonding the reinforcing member 20 and the expanded thermoplastic particles 11 together. As a preferred mode of the present invention, the melting point of the reinforcing member 20 is 130 to 150° C., which is the temperature in the mold in a conventional process. At this temperature, the reinforcing member 20 can be partially softened, so that the Better bonding with the expanded thermoplastic particles 11 to improve the bonding ability of the reinforcing member 20 and the sole body 10 .

In the present invention, the reinforcing member 20 can be arranged in a certain area of the lower surface 102 of the sole body 10, for example, the position of the sole body 10 corresponding to the front of the foot, or the position of the sole body 10 corresponding to the heel, or the position of the sole body 10 corresponding to the arch of the foot s position. As a preferred mode of the present invention, the reinforcing member 20 has a first composite area corresponding to the lower surface 102 of the sole body 10 , that is, the reinforcing member 20 covers the entire lower surface 102 of the sole body 10 . In the present invention, the reinforcing member 20 may also extend to the side of the sole body 10, so as to pressurize and shape the expanded thermoplastic particles 11 on the side.

As a preferred mode of the present invention, the Asker C hardness value of the sole body 10 is 40 to 50C, and the hardness value of the reinforcing member 20 is 75 to 95A on the Shore A hardness scale.

As a preferred mode of the present invention, there are a plurality of the shaping holes 21 , the multiple shaping holes 21 are filled with the reinforcing member 20 , and the shaping holes 21 extend from the reinforced member 20 . The upper surface 101 penetrates to the lower surface 102 . The expanded thermoplastic particles 11 extend to a position where the lower ends of the shaping holes 21 are substantially flush. When the shoe sole is used, the expanded thermoplastic particles 11 and the reinforcing member 20 can touch the ground at the same time, and the reinforcing member 20 can improve the wear resistance and support performance of the sole. , Expanded thermoplastic particles 11 (especially polyurethane expanded thermoplastic particles) have the advantages of good elasticity and good cushioning performance, so that the overall sole's resilience, folding resistance, wear resistance, support performance, and grip performance can meet the relevant requirements.

As a preferred mode of the present invention, the expanded thermoplastic particles 11 are polyurethane expanded thermoplastic particles 11 .

As a preferred embodiment of the present invention, the reinforcing member 20 is made of non-foamed thermoplastic polyurethane. Of course, the reinforcing member 20 in the present invention is not limited to this material. In the present invention, the reinforcing member 20 is preferably made of expanded thermoplastic polyurethane. The particles 11 are materials that can be partially melted under the thermal bonding environment, so as to achieve partial fusion of the expanded thermoplastic particles 11 and the reinforcing member 20 , and improve the bonding ability of the reinforcing member 20 and the expanded thermoplastic particles 11 . In terms of processing and manufacturing, the reinforcing member 20 can be formed by integral injection molding, weaving, or can be processed by 3D printing.

As a preferred mode of the present invention, the expanded thermoplastic particles 11 are spherical or ellipsoidal (the shape when not thermally bonded), and the shaping holes 21 are cylindrical holes. In the embodiment, the shaping holes 21 It is a diamond-shaped hole, of course, in the present invention, the shaped hole 21 can also be a circular hole, a hexagonal hole, or the like.

As a preferred mode of the present invention, the bonding strength between the sole body 10 and the reinforcing member 20 is ≥25 N/cm. Compared with the traditional manufacturing method without the shaping part, the popcorn sole prepared by the present invention adopts the DINTBJC-44 abrasion resistance test standard for detection: the detection value of the present application is less than or equal to 150, the traditional process (popcorn midsole, no With rubber outsole), the average detection value is 250, and the lower the value, the better the wear resistance.

The product form of the present invention is not limited to the embodiment of the present case, and anyone who makes appropriate changes or modifications to it in a similar way should be regarded as not departing from the patent scope of the present invention.

Claims (10)

1. Enhancement mode puffed rice sole, including the sole body that forms and the reinforcement part of compound on the sole body by the combination of inflation thermoplastic granule, the sole body has upper surface, lower surface and forms the side between upper surface and lower surface, its characterized in that: the sole is characterized in that a shaping hole capable of carrying out plastic compression on a single expansion thermoplastic particle is formed in the reinforcing part, the hardness of the reinforcing part is larger than that of the sole body, the thickness of the shaping part is 0.5-2.5 mm, the reinforcing part and the expansion thermoplastic particles are bonded together in a heating mode, and the expansion thermoplastic particles at the lower surface of the sole body are embedded into the shaping hole.

2. The enhanced popcorn shoe sole of claim 1, wherein: the reinforcing member has a first composite region corresponding to a lower surface of the sole body.

3. The enhanced popcorn shoe sole of claim 1, wherein: the Asker C hardness value of the sole body is 40-50C, and the hardness value of the reinforcing part is 75-95A on a Shore A hardness scale.

4. The enhanced popcorn shoe sole of claim 1, wherein: the shaping hole is a plurality of, and is a plurality of shaping hole is covered with the reinforcement part, the shaping hole is followed the upper surface of reinforcement part runs through to the lower surface.

5. The enhanced popcorn shoe sole of claim 1, wherein: the heating mode is steam heating.

6. The enhanced popcorn shoe sole according to claim 5, wherein: the reinforcing member has a melting point of 130 to 150 ℃.

7. The enhanced popcorn shoe sole of claim 1, wherein: the expanded thermoplastic particles are polyurethane expanded thermoplastic particles or nylon expanded thermoplastic particles.

8. The enhanced popcorn shoe sole of claim 1, wherein: the reinforcing part is non-foaming thermoplastic polyurethane.

9. The enhanced popcorn shoe sole of claim 1, wherein: the expanded thermoplastic particles are spherical or ellipsoidal, the shaped holes are cylindrical, and the maximum diameter of the shaped holes is smaller than that of the expanded thermoplastic particles.

10. The enhanced popcorn shoe sole of claim 1, wherein: the bonding strength of the sole body and the reinforcing component is more than or equal to 25N/cm.

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