JP4784119B2 - Method for manufacturing anti-slip soles - Google Patents

Description

The present invention relates to an antiskid material for a shoe sole and a method for producing an antiskid shoe sole. In more detail, the present invention provides a predetermined amount of a sheet made of mesocarp fibers of palm plant fruits, a sheet made of cinnabar fibers of grasses, or a combination thereof. The present invention relates to a method for manufacturing a non- slip shoe sole in which ceramic particles are fixed with an arbitrary pattern .

  When walking on wet roads such as rainy sidewalks, snowy roads, icy roads, boat decks, fish markets, etc., soles with rubber and / or thermoplastic synthetic resin as the main component Various methods have been adopted to provide a slip-proof function.

  The most classic method is to thicken the bottom to form deep wrinkles. In the case of this conventional method, there is a disadvantage that the snow slips into a deep groove and freezes and the anti-slip effect is reduced, or the anti-slip effect is reduced on an icy road.

  As another conventional technique, there is a method of embedding studs in a shoe sole. In the case of this prior art, when walking on a road without snow, a pavement road with no icing, or an iron plate, there is a disadvantage that it is slippery and a mass of the entire shoe is increased.

  Furthermore, as another prior art, there is a method in which a steel fork-shaped anchor is embedded in the heel portion of the shoe sole so that the fork bites the road surface as necessary. In the case of this prior art, there is a drawback that it is troublesome because the shoes do not always have an anti-slip function.

  However, theoretically considering the physical phenomenon of “sliding”, rubber used for walking on wet roads such as rainy sidewalks, snowy roads, frozen roads, boat decks, fish markets, etc. In order for the anti-slip material used for the sole of the shoe, the main component of which is a thermoplastic synthetic resin, to successfully perform the anti-slip function, the anti-slip material absorbs water at the interface between the shoe bottom and the road surface well. It is understood that the contradictory property of maintaining strength must be imparted simultaneously.

  In general, when two objects are trying to move relative to each other, or when they are moving relative to each other, a force that prevents the movement acts at the interface in a tangential direction. Resistance to is called friction. Friction is as follows: (1) True contact occurs at some point within the apparent contact area, where both sides adhere, and the adhesion occurs along with plastic deformation, and the surrounding area undergoes plastic deformation. When the movement always involves shearing of the adhesive part, (2) When one side moves up and down the unevenness of the other side with the movement, a part of the mechanical energy is lost as heat (3 ) Occurs when there is work in which the convex part of one surface digs up the other's surface.

  When walking, the surface of the bottom of the shoe, which is mainly composed of rubber and / or thermoplastic synthetic resin, is in contact with the road surface, and the convex part of the road surface digs up the surface of the bottom of the shoe for work. Friction occurs and does not slip even when walking. Conversely, a film that covers the bottom of the shoe is formed at the interface between the bottom surface of the shoe and the hard surface of the road, and the projecting portion of the road surface digs up the bottom surface of the shoe. When it becomes impossible, friction does not occur and a phenomenon of slipping occurs.

  The cause of the formation of a film formed at the interface between the bottom surface of the shoe and the road surface, the main component of which is rubber and / or thermoplastic synthetic resin, is water. Therefore, in order to prevent slipping, (i) the water at the interface between the bottom surface of the shoe and the road surface is quickly removed, and the convex portion of the road surface digs up the bottom surface of the shoe. (B) The convex part of the bottom surface of the shoe should be able to work by digging up the road surface. For (i), it is necessary to give the shoe sole the property of absorbing as much water as possible quickly. For (b), an altitude higher than the hardness of the road surface is given to the sole of the shoe, and a property of biting the road surface with certainty, that is, a throwing effect is given.

  Considering this sliding theory, rubber and / or heat characterized in that 3 to 30 parts by weight of at least one of seed shell, fruit core and leather pulverized product is blended with 100 parts by weight of diene rubber. A rubber composition for shoe soles mainly composed of a plastic synthetic resin has been proposed (JP-A-5-154005).

  However, this conventional technique has the disadvantages that the water-absorbing seed shell, fruit core and leather pulverized product swell during use for a long period of time, reducing the strength and reducing the anti-slip function.

  Further, considering this slip theory, 0.05 weight of pulverized material obtained by pulverizing walnut shells or gramineous cereal shells to an average particle size of 1.0 mm or less with respect to 100 parts by weight of rubber and / or resin. A method of blending not less than 2.0 parts and not more than 2.0 parts by weight has been proposed (Japanese Patent No. 3270387).

  However, this prior art also has the disadvantages that the pulverized water-absorbent seed shell swells during long-term use, resulting in reduced strength and reduced anti-slip function.

As a method for improving the disadvantages of the prior art proposed in consideration of the above-mentioned slip theory, the applicant of the present application has proposed that rubber and / or a rice kernel particle and / or a fruit seed particle be bonded around ceramic particles. A shoe sole anti-slip material mainly composed of a thermoplastic synthetic resin, and a predetermined amount of the shoe sole anti-slip material are placed on a shoe mold, and then a rubber for shoe sole and / or a thermoplastic synthetic resin compound is prepared. A patent application was filed by proposing a method for producing a non-slip bottom including filling and pressing (Japanese Patent Application No. 2004-64744).
Rice husks, which are organic substances used in this conventional technology, are pulverized husks of grains such as rice, barley, wheat, buckwheat, rice bran, millet, and acne. It is a pulverized particle of a nuclear seed of an equal fruit.

  By using ceramics, this prior art can give the shoe sole an altitude higher than the hardness of the road surface, and can provide a property of biting the road surface reliably, that is, a throwing effect. That the department was able to dig up the road surface and crushed or apricots of rice, barley, wheat, buckwheat, straw, millet, acne and other fruits such as apricot, peach, walnut, plum By using water-absorbing particles such as pulverized seeds of nuclear seeds, the sole of the shoe can be given the property of absorbing water as quickly and as much as possible. It is possible to provide an excellent antiskid shoe sole in that the property of absorbing water at the interface well and the contradictory property of maintaining strength can be simultaneously provided.

Although this conventional technique can provide an anti-slip sole that is excellent in terms of pure technology, there is room for improvement in terms of productivity, production cost, and merchandising.
JP-A-5-154005 Japanese Patent No. 3270387

  The problem to be solved by the present invention is that rubber and / or thermoplastic synthetic used when walking on wet roads such as rainy sidewalks, snowy roads, icy roads, boat decks, fish markets, etc. The antiskid shoe sole, which is mainly composed of a resin-based rubber and / or a thermoplastic synthetic resin, swells during long-term use and is reduced in strength, while maintaining strength. It is to prevent functional degradation and to provide an improved anti-slip shoe sole in terms of productivity, production cost, and merchandising.

  In order to formulate means for solving the problem, the present inventor quickly removes the water at the interface between the anti-slip theory described above, i.e., the bottom surface of the shoe and the road surface, and the convexity of the road surface. (B) Applying that the convex part of the bottom surface of the shoe allows the work to dig up the road surface. did.

  For (i), instead of pulverized grains of rice, barley, wheat, buckwheat, straw, millet, acne, etc. husks of grains, apricots, peaches, walnuts, plums, etc. The use of a sheet of fruit mesocarp fiber, a sheet of Asa plants, or a combination of these, and the use of ceramics for (b) was studied.

  In the present invention, the mesocarp fibers of the fruits of the palm family plant include Actinophleus macarthurii BECC., Harphija palm (Aiphanes karyotaefolia WENDL.), Binrow (Areca catchu L.), Sato palm R.en. J. palm (Arecastrum romanzoffianum BECC.), Spider palm (Attaleacohune MART.), Brasilius palm (A. funifera MART.), C. boraxus flavifer L. Cubadachi Peacock (Cary ota mitis LOUR.), peacock palm (C. urens L.), Grenada palmica (Ceroxylon andicola humb.), areca palm (Chrysalidocarpus pulescens CoL. Coleococcus amicarum WARB.), Brazilian palm coconut palm (Cernopha cerifera MART.), Talbot coconut palm (Corypha undraculifera L.), Tadabayashi (C. uttan LAM.), Drosophila coconut (Cyrtostad. occa GAERTN.), chestnut (Guielma gassipaes L. H. BAILEY), kencha palm (Hoea bemmorea BECC.), giraffe (Decemonoropus draco BL.), tori coco (B. (Jubaeaspectabilis H.B.KUNTH.), Benicia washi (Latania commensoni GMEL.), Prickly pear (Licuala grandis H.) WENDL. ), Java belo (Livistona roundifolia MART.), Bero (L. subglobosa MART.), Omiyashi (Lodocea seyhellarum LABILL.), Tokashiyashi (Mascarena lacenica L.H. Metroxylon longispinum BECC.), M. rumphii MART., Sago palm (M. sagu ROTTB.), Nippa palmi (Banparti) LURTB. RB.-RODR.), Canary palm (Phoenix canariensis CHAUB.), Date palm (P. dactylifera L.), P. hanceana NAUD., P. paludosa R. GA. P. , Shinno palm (P. roebelenii O'BREN), sugar beet (P. sylvestris ROXB.), Indy (P. zeylanica TRIN.), American elephant coconut (Phytelephas macrocarpa RUIZ.), Raffia (R. (R. vinifera BEAUV.), Cabbage palm (Roystonea) leracea O.F.COOK), R. regia OF COOK, Savannah sabal palm (Sabal mauritiformis GRISER et H.WENDL.), Kirin palm (Stevensonia borsigiana DUNG. It is at least one selected from the group consisting of Okinawa (Aashingtonia filifera WENDL.) And Saraka palm (Zalaccaedulis Bt.).

  The most preferred mesocarp fiber of coconut fruit in the present invention is the mesocarp fiber of coconut fruit. Coco fruit is oval or oval, 25-30cm long, with a base of green and enlarged flakes, a thin epidermis, and a thick brown-brown fibrous mesocarp inside. Rarely, there is a nucleus, or endocarp, that is almost spherical, hard and black, 3 to 5 mm thick and with three indentations at the base. The fiber layer of mesocarp (coconut fiber, coir) leaves only fiber by rotification method and is beaten with a scissors, used for ropes, scourers, brushes, rugs, sashes for deck washing, stuffing, etc. Yes. In particular, this fiber has a high durability in water.

  In this invention, the sheet | seat processed with the mesocarp fiber of the fruit of palmaceous plant is used. The thickness of the sheet is preferably in the range of 1 to 10 mm. When the thickness of the sheet is 1 mm or less, the particle size and the amount of the ceramic particles are limited, and the anti-slip effect is weakened. On the other hand, when the sheet thickness is 10 mm or more, the range of the particle size of the ceramic particles is enlarged and the amount of incorporation is increased, but it becomes unstable when worn and excessive physical properties are also obtained from the point of anti-slip effect. This is not preferable because it will increase the cost.

  In the present invention, the most preferred sheet of the Ginseng fiber is a sheet made from jute (Corchorus capsularis L.).

  The term “ceramics” used in the present invention is defined as “a solid material in which the main constituent material produced by sintering or melting at a high temperature is inorganic or non-metallic”.

  Examples of the ceramic used in the present invention include oxide ceramics. Oxide ceramics include alumina (aluminum oxide), aluminate, mullite, zinc oxide, rare earth oxide, chromium oxide, cobalt oxide, silica, zirconia, tin oxide, tungsten oxide, zirconate, etc. Illustrated.

  Another example of the ceramic used in the present invention is a non-oxide ceramic. Non-oxide ceramics include nitrides (Si3N4, AlN, BN, TiN, etc.), carbides (SiC, TiC, B4C, WC, etc.), borides (LaB6, TiB2, ZrB2, etc.), sulfides (CdS, MoS2, etc.) ), Silicides (MoSi2 etc.).

  In the present invention, a ceramic composite material further comprising a ceramic matrix, a fiber reinforced ceramic whose strength or toughness is enhanced by blending fibers in the ceramic, and particles of a material different from the base material are dispersed in the ceramic to provide strength or toughness. It is also possible to use a cermet which is a composite material of particle dispersed ceramics and ceramics and metal reinforced.

  Preferred ceramics used in the present invention are dense titanium carbide-dispersed alumina composed of oxide alumina and non-oxide titanium carbide, having a large Vickers hardness of 2000, or zirconia-added alumina to which zirconia fine particles are added, partially stable Alumina-dispersed zirconia, titanium carbide, tungsten carbide, titanium nitride, titanium boride, zirconium boride, etc., in which alumina is dispersed in zirconium zirconia or the like to suppress zirconia grain growth and further improve strength and toughness.

  It is preferable that the ceramic particles used in the present invention have a water absorption performance to the extent that they are present. For this purpose, it is preferable to form pores on the surface of the ceramic particles. The pores are preferably independent pores rather than continuous pores. However, it is difficult to form 100% continuous pores or 100% independent pores, and most of them are mixed. Pores are generally formed by mixing and burning rice husks and organic fibers at the time of ceramic production. When these are gasified at a temperature at which glassy material is formed, the porous body has closed pores. Is manufactured.

  The average particle diameter of the ceramic particles used in the present invention is 65 to 1000 μm, preferably 500 to 1000 μm. When the average particle diameter of the ceramic particles is 65 μm or less, it becomes a fine powder and the anti-slip effect is reduced, which is not preferable. On the contrary, if the average particle size of the ceramic particles is 1000 μm (1 mm) or more, the engagement force with the sheet processed with mesocarp fibers of the palm family plant is weakened and it is easy to drop off, which is not preferable.

  In the present invention, the amount of ceramic particles applied to a sheet processed with mesocarp fibers of a palm plant fruit is preferably about 0.1 to 0.2 g per cm 3 of the sheet. When the amount of ceramic particles is 0.1 g / cm 3 or less, the anti-slip effect is reduced, which is not preferable. On the other hand, if the amount of ceramic particles is 0.2 g / cm 3 or more, it is not preferable because of excessive physical properties in terms of the anti-slip effect, which increases the cost.

  The anti-slip shoe sole of the present invention is a shoe sole mold in which a sheet made of mesocarp fibers of a palm plant is placed, a predetermined amount of ceramic particles are dispersed in an arbitrary pattern thereon, and then a shoe sole rubber And / or by filling and pressing a thermoplastic synthetic resin formulation. An advantage of this manufacturing method is that it is possible to produce a non-slip shoe sole with a relatively small amount of ceramics.

  The main material used for the anti-slip shoe sole of the present invention is rubber or thermoplastic synthetic resin, or a mixture of rubber and thermoplastic synthetic resin, and is not particularly limited. However, when rubber is used as the main material used for the anti-slip shoe sole of the present invention, the rubber compounding can be produced irrespective of the relatively soft rubber (hardness of 45 to 70 °).

Means to solve the problem

  Therefore, according to the present invention, the above problem is solved as follows.

1. A sheet made of mesocarp fiber of a fruit of a palm plant, a sheet made of a gin skin fiber of a grass family, or a sheet having a thickness of 1 to 10 mm made of a combination thereof. ³ 0.1 to 0.2 g of ceramic particles per particle is dispersed in advance in an arbitrary pattern, placed on a shoe mold, and filled with a rubber for shoe sole and / or a thermoplastic synthetic resin compound, A method of manufacturing a non-slip sole including pressing.

5. In said 1 item | term, the particle size of ceramic particle shall be 65-1000 micrometers.

The invention's effect

According to the invention described in claim 1, the mesocarp fiber of a palm plant fruit having a superior water absorption rate than the hardness, and / or the gin skin fiber itself of a gramineous plant, or between the fiber and the fiber, from the water absorption rate. Since the ceramic particles with superior hardness are dispersed and fixed, the water at the interface between the shoe bottom and the road surface is quickly removed, and the convex part of the road surface digs up the bottom surface of the shoe. The ceramic particles having a hardness higher than the hardness of the road surface can be used for work and reliably bite the road surface, that is, the anchoring effect is achieved. Therefore, an antiskid shoe sole that exhibits the anti-slip effect over a long period of time is provided.
Furthermore, since the thickness of the sheet made of mesocarp fiber of palm plant fruit, the sheet made of cinnabar fiber of Asaaceae plant, or the sheet made of a combination thereof was 1-10 mm, the particle size of the ceramic particles In addition, an anti-slip effect is achieved without limiting the amount of incorporation, and an anti-slip shoe sole having a sense of stability when worn is provided.

According to the invention described in claim 2, since the particle size of the ceramic particles is set to 65 to 1000 μm, the engagement force with the sheet processed with the mesocarp fiber of the palm family fruit and / or the gin leather fiber of the grass family plant is obtained. There is provided an anti-slip shoe sole that is stable and does not fall off and can be exerted over a long period of time without reducing the anti-slip effect.

  Hereinafter, the best mode for carrying out the invention will be specifically described with reference to Examples and Test Examples.

  As the ceramic particles, “SYNOPAL (registered trademark)” which is an aggregate for paving manufactured by Mishu Kosan Co., Ltd. was used. The apparent specific gravity of the ceramic particles is 1.99, the water absorption is 1.2%, and the hardness (former Mohs hardness) is 7-8.
The standard particle size is in the range of 0.5 to 1.0 mm.

As the mesocarp fiber of the palm fruit, a coconut (Cocos nucifera LIEBM.) Fruit mesocarp fiber was used to produce a sheet having a thickness of 5 mm.

  A rubber compound for shoe soles was produced with the following composition.
                Ingredient Mass part
            Natural rubber 100
            Isoprene Rubber 150
            Silica 25
            Vulcanization accelerator M 5.5
            Vulcanization accelerator TS 0.7
            Stearic acid 2.5
            Zinc oxide 12.5
            Sulfur 6

About 0.15 g of the ceramic particles per 1 cm3 of the sheet was fixed on a sheet of 5 mm thick mesocarp fiber of the coconut fruit (Cocos lucifera LIEBM.), And then placed on a shoe mold. Next, 100 g of the above rubber compound was filled and molded by a conventional method to produce a shoe sole.

[Effect Confirmation Test Example 1]
  The anti-slip performance on the iron plate of the shoe sole with the anti-slip material of the present invention is shown in Table 1 in comparison with that of Control 1 (anti-slip material-free rubber) and Control 2 (ceramic-added rubber).

[Effect confirmation test example 2]
  Table 1 shows the anti-slip performance on the iron plate of the shoe sole with the anti-slip material according to the present invention compared to that of the control 1 (rubber without additive anti-slip) and the control 2 (rubber with ceramics). It is shown in 2.

Rubber used for walking on wet roads such as rainy sidewalks, snowy roads, frozen roads, boat decks, fish markets, and / or rubbers based on thermoplastic synthetic resins and / or Anti-slip shoe soles based on thermoplastic synthetic resin improve the disadvantage that they swell and decrease strength during long-term use, and prevent deterioration of the anti-slip function by maintaining strength, productivity, From the viewpoint of production cost and merchandising, an anti-slip material and an anti-slip sole for a sole are provided, and a sheet composed of mesocarp fibers of a palm plant fruit, a gin leather fiber of a grass family The use of a sheet comprising a sheet or a combination thereof is expanded.

Claims (2)

A sheet made of mesocarp fiber of a fruit of a palm plant, a sheet made of a gin skin fiber of a grass family, or a sheet having a thickness of 1 to 10 mm made of a combination thereof. ³ 0.1 to 0.2 g of ceramic particles per particle is dispersed in advance in an arbitrary pattern, placed on a shoe mold, and filled with a rubber for shoe sole and / or a thermoplastic synthetic resin compound, A method of manufacturing a non-slip sole including pressing. The method for producing an antiskid shoe sole according to claim 1, wherein the ceramic particles have a particle size of 65 to 1000 µm.