Special shoe outsole for nail factory and production method thereof

Abstract

The invention discloses a shoe outsole structure special for a nail factory and a production method thereof.The shoe outsole structure special for the nail factory comprises a foaming midsole and a rubber outsole, a Kevlar anti-puncture layer is arranged between the foaming midsole and the rubber outsole, a layer of heat insulation cotton adheres to the upper surface and / or the lower surface of the Kevlar anti-puncture layer, the thickness of the rubber outsole is 3-5 mm, and the thickness of the rubber outsole is 3-5 mm. The thickness of the Kevlar anti-puncture layer is 2.3-3.0 mm, the thickness of the heat insulation cotton is 0.5-1.0 mm, and the thickness of the foaming insole is 5-8 mm. According to the outsole structure, the experience discomfort caused by hardness and toughness of the sole in an original structure is overcome, the comfort of the safety shoe is greatly improved, a good anti-puncture effect is achieved, the production method is simple, operation is easy, practicability is high, the outsole structure is suitable for large-scale production and use, and the outsole structure has good market prospects.

Description

Technical Field

[0001] The invention belongs to the technical field of shoemaking, and in particular relates to a special shoe outsole for a nail making factory and a production method thereof. Background Art

[0002] The design of puncture-proof safety shoes must meet certain national standards, for example, the puncture-proof force must be greater than 1100N to ensure that they can provide adequate protection in actual use. The puncture-proof safety shoes mainly rely on adding puncture-proof midsoles or steel sheets to the midsole above the sole. These materials can effectively prevent punctures from sharp objects, thereby protecting the feet from injury. Common materials include steel plates and Kevlar midsoles, such as Figure 1 As shown, in general, the outsole structure of safety shoes is a rubber outsole + a middle foam layer + a puncture-resistant midsole. The puncture-resistant midsole is at the top of the outsole structure and is closest to the sole of the foot. Although it protects the safety of the foot, the high hardness and strong toughness of the puncture-resistant outsole make the wearing comfort of the safety shoes poor.

[0003] In order to improve the wearing comfort of safety shoes, the prior art with application number 201310399986.X adjusts the puncture-resistant midsole between the rubber outsole and the foaming layer. The puncture-resistant midsole used in the prior art is a high-strength polyester fiber compact fabric. When the inventor uses the Kevlar puncture-resistant layer to make the outsole structure of safety shoes according to the method disclosed by the inventor, it is found that the semi-finished sole after the rubber outsole and the Kevlar puncture-resistant layer are integrally vulcanized will be deformed. Figure 2 , affecting further molding and sole quality. Summary of the invention

[0004] In order to solve the problem that the semi-finished shoe sole may be deformed after the rubber outsole and the Kevlar anti-puncture midsole are integrally vulcanized, the present invention provides a special shoe outsole for a nail manufacturing factory and a production method thereof.

[0005] The objective of the present invention is achieved in the following manner: comprising a foam midsole and a rubber outsole, a Kevlar puncture-resistant layer is arranged between the foam midsole and the rubber outsole, a layer of heat-insulating cotton is bonded to the upper surface and / or the lower surface of the Kevlar puncture-resistant layer, the thickness of the rubber outsole is 3-5 mm, the thickness of the Kevlar puncture-resistant layer is 2.3-3.0 mm, the thickness of the heat-insulating cotton is 0.5-1.0 mm, and the thickness of the foam midsole is 5-8 mm.

[0006] When the foam midsole is made of EVA elastic material, a layer of heat insulation cotton is bonded to the upper and lower surfaces of the Kevlar anti-puncture layer.

[0007] When the foam midsole is made of PU elastic material, a layer of heat-insulating cotton is bonded to the lower surface of the Kevlar anti-puncture layer.

[0008] The thermal insulation wool is GMF thermal insulation wool.

[0009] The production method of the above-mentioned sole structure for shoes specially used in nail making factories comprises the following steps: (1) According to the use requirements of the rubber outsole, a rubber outsole compound is kneaded, and the mixed rubber is cut into outsole rubber sheets according to the shape of the mold for standby use; (2) Cut the Kevlar anti-puncture layer and the heat-insulating cotton according to the size of the outsole, glue them together and set them aside; (3) Adjust the vulcanization parameters, the vulcanization temperature is 160±5℃, and the time is 400±10s; (4) After the vulcanization parameters meet the requirements of step (3), the vulcanization mold is opened, the cut outsole rubber sheet is placed in the mold, and the material bonded and formed in step (2) is placed on top of the outsole rubber sheet, and the mold is closed. Through the rubber cross-linking reaction, the one-piece molding vulcanization process is completed; (5) The semi-finished outsole after vulcanization molding is taken out, placed in a mold, injected with PU elastic material, molded, and naturally cooled to form a shoe outsole structure specially used in a nail factory; or, the semi-finished outsole is placed in a mold, a foamed EVA blank is placed on top of the outsole, the mold is closed, heated and pressurized, the EVA foam is bonded to the semi-finished outsole, and then water-cooled to form a shoe outsole structure specially used in a nail factory.

[0010] The foamed EVA blank is prepared according to the use requirements of the EVA foamed midsole. The required raw materials are put into an internal mixer to prepare a foamed EVA base material, which is then granulated and foamed once in an EVA midsole mold at 175-185°C to form a foamed EVA blank, which is then cooled for use.

[0011] The size of the Kevlar anti-puncture layer and the thermal insulation cotton is 3-4mm smaller than the rubber outsole.

[0012] Compared with the prior art, the present invention adheres a layer of heat-insulating cotton to the lower surface and / or the lower surface of the Kevlar anti-puncture layer to form a Kevlar anti-puncture layer with heat-insulating effect, and then vulcanizes it with the rubber outsole to form a semi-finished outsole, and then connects the semi-finished outsole with the foaming layer to form a special outsole for nail factories. This new outsole structure is applied to safety shoes, which overcomes the discomfort caused by the hardness and toughness of the sole of the foot in the original structure, greatly improves the comfort of safety shoes, and also has a good anti-puncture effect. The production method is simple, easy to operate, and highly practical. It is suitable for mass production and has good market prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the puncture-resistant combined outsole structure in the prior art.

[0014] Figure 2 This is a schematic diagram of the deformation that occurs after the rubber outsole and the Kevlar anti-puncture layer are directly vulcanized into one piece.

[0015] Figure 3 It is a structural schematic diagram of the present invention.

[0016] Figure 4 This is a real picture of a semi-finished outsole with no insulation cotton bonded to the upper surface of the Kevlar puncture-resistant layer and insulation cotton bonded to the lower surface before being compounded with the rubber outsole. DETAILED DESCRIPTION

[0017] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the content of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the present invention.

[0018] like Figure 3 , Figure 4 As shown, a shoe outsole specially used in a nail-making factory comprises a foam midsole 1 and a rubber outsole 3, a Kevlar anti-puncture layer 2 is arranged between the foam midsole 1 and the rubber outsole 3, when the foam midsole is made of EVA elastic material, a layer of heat-insulating cotton is bonded to the upper and lower surfaces of the Kevlar anti-puncture layer; when the foam midsole is made of PU elastic material, a layer of heat-insulating cotton is bonded to the lower surface of the Kevlar anti-puncture layer, the average thickness of the foam midsole is a=5-8mm, the thickness of the rubber outsole without anti-slip pattern is b=3-5mm, the thickness of the Kevlar anti-puncture layer is 2.3-3.0mm, and the thickness of the heat-insulating cotton is 0.5-1.0mm (the total thickness of the Kevlar anti-puncture layer and the heat-insulating cotton is c).

[0019] The insulation cotton is GMF insulation cotton. MGF insulation cotton is a flexible sheet insulation material made by combining porous oxidized vacuum silica material and polymer skeleton material through vacuum cross-linking gasification high-pressure drying preparation process. MGF insulation cotton has a porous structure, a uniform surface, and a thermal conductivity coefficient as low as 0.014-0.017W / (m·K). It has super high thermal insulation performance and also has excellent properties such as hydrophobicity, flame retardancy, insulation, and environmental protection. It can be directly die-cut, hemmed, and composited with double-sided tape / film, which complies with the environmental protection ROSH directive and has an operating temperature of -40~200℃.

[0020] The method for producing the outsole structure of the shoe specially used in the nail making factory comprises the following steps: (1) According to the use requirements of the rubber outsole, a rubber outsole compound is kneaded, and the mixed rubber is cut into outsole rubber sheets according to the shape of the mold for standby use; (2) Cut the Kevlar puncture-resistant layer and thermal insulation cotton according to the size of the outsole. The size of the Kevlar puncture-resistant layer and thermal insulation cotton is slightly smaller than the size of the rubber outsole, generally 3-4 mm smaller than the size of the rubber outsole; After bonding and forming, it is ready for use. When the foam midsole is made of EVA elastic material, a layer of heat insulation cotton is bonded to the upper and lower surfaces of the Kevlar anti-puncture layer; when the foam midsole is made of PU elastic material, a layer of heat insulation cotton is bonded to the lower surface of the Kevlar anti-puncture layer; (3) Adjust the vulcanization parameters, the vulcanization temperature is 160±5℃, and the time is 400±10s; (4) After the vulcanization parameters meet the requirements of step (3), the vulcanization mold is opened, the cut outsole rubber sheet is placed in the mold, and the material bonded and formed in step (2) is placed on top of the outsole rubber sheet, and the mold is closed. Through the rubber cross-linking reaction, the one-piece molding vulcanization process is completed; (5) The semi-finished outsole after vulcanization molding is taken out, placed in a mold, injected with PU elastic material, molded, and naturally cooled to form a shoe outsole structure specially used in a nail factory; or, the semi-finished outsole is placed in a mold, a foamed EVA blank is placed on top of the outsole, the mold is closed, heated and pressurized, the EVA foam is bonded to the semi-finished outsole, and then water-cooled to form a shoe outsole structure specially used in a nail factory.

[0021] The foamed EVA blank is prepared according to the use requirements of the EVA foamed midsole. The required raw materials are put into an internal mixer to prepare a foamed EVA base material, which is then granulated and foamed once in an EVA midsole mold at 175-185°C to form a foamed EVA blank, which is then cooled for use.

[0022] The preparation of the rubber outsole and the foamed EVA blank, and the process conditions such as temperature, pressure, water cooling, etc. required for the secondary foaming of EVA are all mature processes in the prior art and are not within the scope of protection of the present invention.

[0023] The outsole structure of the special shoe for the nail factory prepared by the present invention is tested according to / T12017-1989 to have an anti-puncture force of up to 1480-1500N, which is greater than 1100N in the national standard of anti-puncture safety shoes.

[0024] The outsole structure of the special shoe for the nail manufacturing factory prepared by the production method disclosed in the present invention is applied to safety shoes, which overcomes the discomfort caused by the hardness and toughness of the sole of the foot in the original structure, greatly improves the wearing comfort of the shoe, and also has a good anti-puncture effect. The production method is simple, easy to operate, and highly practical, and is suitable for mass production and use, and has a good market prospect.

[0025] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several changes and improvements can be made without departing from the overall concept of the present invention, which should also be regarded as the scope of protection of the present invention.

Claims

1. A shoe outsole structure specially used in a nail making factory, characterized in that: It includes a foam midsole and a rubber outsole, a Kevlar puncture-resistant layer is arranged between the foam midsole and the rubber outsole, a layer of heat-insulating cotton is bonded to the upper surface and / or lower surface of the Kevlar puncture-resistant layer, the thickness of the rubber outsole is 3-5mm, the thickness of the Kevlar puncture-resistant layer is 2.3-3.0mm, the thickness of the heat-insulating cotton is 0.5-1.0mm, and the thickness of the foam midsole is 5-8mm.

2. The outsole structure for a nail factory according to claim 1, characterized in that: When the foam midsole is made of EVA elastic material, a layer of heat insulation cotton is bonded to the upper and lower surfaces of the Kevlar anti-puncture layer.

3. The outsole structure for shoes used in nail making factories according to claim 1 is characterized in that: When the foam midsole is made of PU elastic material, a layer of heat-insulating cotton is bonded to the lower surface of the Kevlar anti-puncture layer.

4. The outsole structure for shoes used in nail making factories according to claim 1, 2 or 3, characterized in that: The thermal insulation wool is GMF thermal insulation wool.

5. The method for producing a special shoe outsole structure for a nail factory according to claim 1, characterized in that: The following steps are included: (1) According to the use requirements of the rubber outsole, a rubber outsole compound is kneaded, and the mixed rubber is cut into outsole rubber sheets according to the shape of the mold for standby use; (2) Cut the Kevlar anti-puncture layer and the heat-insulating cotton according to the size of the outsole, glue them together and set them aside; (3) Adjust the vulcanization parameters, the vulcanization temperature is 160±5℃, and the time is 400±10s; (4) After the vulcanization parameters meet the requirements of step (3), the vulcanization mold is opened, the cut outsole rubber sheet is placed in the mold, and the material bonded and formed in step (2) is placed on top of the outsole rubber sheet, and the mold is closed. Through the rubber cross-linking reaction, the one-piece molding vulcanization process is completed; (5) The semi-finished outsole after vulcanization molding is taken out, placed in a mold, injected with PU elastic material, molded, and naturally cooled to form a shoe outsole structure specially used in a nail factory; or, the semi-finished outsole is placed in a mold, a foamed EVA blank is placed on top of the outsole, the mold is closed, heated and pressurized, the EVA foam is bonded to the semi-finished outsole, and then water-cooled to form a shoe outsole structure specially used in a nail factory.

6. The method for producing a special shoe outsole structure for a nail factory according to claim 5, characterized in that: The foamed EVA blank is prepared according to the use requirements of the EVA foamed midsole. The required raw materials are put into an internal mixer to prepare a foamed EVA base material, which is then granulated and foamed once in an EVA midsole mold at 175-185°C to form a foamed EVA blank, which is then cooled for use.

7. The method for producing a special shoe outsole structure for a nail factory according to claim 5, characterized in that: The size of the Kevlar anti-puncture layer and the thermal insulation cotton is 3-4mm smaller than the rubber outsole.

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