CN112841809B

CN112841809B - Composite sole structure, manufacturing method thereof and anti-static shoes and boots

Info

Publication number: CN112841809B
Application number: CN202110140969.9A
Authority: CN
Inventors: 秦蕾; 梁高勇; 王修行; 吴毅辉; 李玉才; 方军
Original assignee: Institute of Quartermaster Engineering Technology Institute of Systems Engineering Academy of Military Sciences
Current assignee: Institute of Quartermaster Engineering Technology Institute of Systems Engineering Academy of Military Sciences
Priority date: 2021-01-29
Filing date: 2021-01-29
Publication date: 2022-03-15
Anticipated expiration: 2041-01-29
Also published as: CN112841809A

Abstract

The invention discloses a composite sole structure, a manufacturing method thereof and anti-static shoes and boots, wherein the composite sole structure comprises a sole main body, a conductive ribbon, a conductive sheet, an anti-static shoe outsole, a filling core and an insole; the insole, the sole main body and the anti-static outsole are sequentially connected from top to bottom, the filling core, the conductive braid and the conductive sheet are sequentially embedded in the heel part of the sole main body from top to bottom, the upper mounting surface of the filling core is fixed on the insole, the conductive braid is fixed on the lower mounting surface of the filling core, the first mounting surface on the conductive sheet is in contact with the conductive braid, and the second mounting surface of the conductive sheet penetrates through the sole main body to be connected with the anti-static outsole.

Description

Composite sole structure, manufacturing method thereof and anti-static shoes and boots

Technical Field

The invention relates to a composite sole structure, a manufacturing method thereof and anti-static shoes and boots, and belongs to the technical field of shoemaking.

Background

The antistatic performance of the shoes and boots is usually realized by adopting a conductive mesh belt and an antistatic rubber-plastic material, and the antistatic performance of the shoes and boots can be realized only by ensuring that all layers of the bottom parts of the shoes and boots are closely matched and static is smoothly guided into the ground. Influenced by various aspects such as sole component structure, material performance, etc. of shoes and boots, the antistatic performance of shoes and boots has unstable phenomenon to along with the continuation of time, the antistatic performance of shoes and boots has the possibility of decay, makes the operation on duty of electrostatic protection post have the potential safety hazard.

Disclosure of Invention

In view of the above problems, an object of the present invention is to provide a composite sole structure, a method for manufacturing the same, and an anti-static shoe, which can ensure the stability and durability of the electrical performance index of the shoe, and can improve the production yield and the use safety of the product.

In order to achieve the purpose, the invention adopts the following technical scheme that the composite sole structure comprises a sole main body, a conductive braid, a conductive sheet, an anti-static outsole, a filling core and an insole; the insole, the sole body and the anti-static outsole are sequentially connected from top to bottom, the filling core, the conductive mesh belt and the conductive sheet are sequentially embedded in the heel part of the sole body from top to bottom, the upper mounting surface of the filling core is fixed on the insole, the conductive mesh belt is fixed on the lower mounting surface of the filling core, the first mounting surface on the conductive sheet is in contact with the conductive mesh belt, and the second mounting surface of the conductive sheet penetrates through the sole body to be connected with the anti-static outsole.

In some embodiments, the second mounting surface of the conductive plate is in a V-shaped structure, and a slot is formed on the heel portion of the anti-static outsole, and the second mounting surface of the conductive plate is placed into the slot.

In some embodiments, the composite sole structure is formed using a lasting injection process.

In some embodiments, the sole body is made of PU material; the anti-static outsole is made of rubber; the filler is made of Osley material.

In some embodiments, the formulation for making the antistatic outsole comprises the following components in parts by mass: 60-70 parts of nitrile rubber, 8-13 parts of natural rubber, 15-20 parts of butadiene rubber, 3-5 parts of carbon nanotubes, 0.5-1 part of stearic acid, 2-3 parts of an active agent, 4-5 parts of zinc oxide, 35-45 parts of fillers, 1-1.5 parts of sulfur and 0.1-0.15 part of an accelerator TS.

In some embodiments, the sole body is prepared from the following components in parts by mass:

the component A comprises: 40-50 parts of polytetrahydrofuran ether, 25-30 parts of 2-functional EO-capped polyether with 4000 molecular weight, 15-25 parts of 3-functional EO-capped polyether with 6000 molecular weight, 0.5-2 parts of polyether foam stabilizer, 0.5-1 part of glycerol and 2-3 parts of permanent antistatic agent;

the component B comprises: 35-40 parts of polytetrahydrofuran ether and 60-65 parts of diphenylmethane diisocyanate.

The invention also provides a manufacturing method of the anti-static outsole in the composite type sole structure based on the embodiment, which comprises the following steps:

1) preparing nitrile rubber, natural rubber, a carbon nanotube and filling materials according to the mass ratio, then adding the mixture into a ten-thousand-horsepower internal mixer, fully stirring, adjusting the stirring speed and temperature in the ten-thousand-horsepower internal mixer according to the characteristics of materials, checking a product in the internal mixing process, and stopping the operation of the ten-thousand-horsepower internal mixer after confirming complete internal mixing to prepare a primary blank;

2) checking the primary blank material, after the primary blank material is qualified, taking a proper amount of the primary blank material according to the condition of an order, placing the primary blank material in an open mill for open milling, adding sulfur and an accelerator TS according to a corresponding proportion, and carrying out complete reaction on open milled products;

3) transferring the milled product to a vulcanization workshop, setting the temperature of the mold to be constant at 150-;

4) the quality of the molded anti-static outsole 400 is checked.

The invention also discloses a manufacturing method of the sole main body in the composite sole structure based on the embodiment, which comprises the following steps:

i) preparing polytetrahydrofuran ether, 2 functional EO end capping polyether with 4000 molecular weight, 3 functional EO end capping polyether with 6000 molecular weight and permanent antistatic agent according to the mass parts, then adding the mixture into the first reaction kettle, and fully stirring the mixture.

ii) slowly heating the first reaction kettle to 60-65 ℃, starting the reaction, and keeping the temperature constant for 2 hours;

iii) analyzing the reaction product in the first reaction kettle, and measuring the acid value, the moisture, the hydroxyl value and the viscosity of the reaction product; when the detection reaches the standard, cooling the first reaction kettle to 45 ℃, and packaging for later use, wherein the product is a component A;

iv) putting diphenylmethane diisocyanate into the second reaction kettle in advance, and slowly putting the polytetrahydrofuran ether with a quantitative formula into the second reaction kettle; slowly heating the second reaction kettle to 70-75 ℃, reacting for 2 hours, detecting the content of isocyanate in the reaction product in the second reaction kettle, cooling to below 45 ℃ when the required index is reached, and packaging for later use, wherein the product is the component B.

The invention also provides a manufacturing method of the composite sole structure based on the embodiment, which comprises the following steps:

1) heating the sole main body to enable the sole main body to be in a liquid state; the temperature of the die is raised to 55 ℃; bridging the outer sole surface of the antistatic shoe, and heating to 60 ℃;

2) sheathing the upper surface into a shoe tree and fixing the shoe tree on a side mold of the mold;

3) wrapping the periphery of the bottom of the upper surface around the insole, fixing the insole at the bottom of the side mold of the mold, and fixing the filling core at the bottom of the heel part of the insole; the conductive mesh belt is longitudinally fixed at the bottom of the filling core;

4) arranging a conducting strip into the heel part of the anti-static outsole, then arranging the anti-static outsole into a die bottom die, and contacting the conducting strip with a conducting braid;

5) and injecting the liquid sole main body into the mold, and curing and molding the sole main body to complete the manufacture of the composite sole structure.

In addition, the invention also provides anti-static shoes and boots, which comprise the composite sole structure in the embodiment.

By adopting the technical scheme, the invention has the following advantages: the insole, the sole main body and the anti-static outsole of the invention are sequentially connected from top to bottom, the filling core, the conductive braid and the conductive sheet are sequentially embedded in the heel part of the sole main body from top to bottom, the upper mounting surface of the filling core is fixed on the insole, the conductive braid is fixed on the lower mounting surface of the filling core, the first mounting surface on the conductive sheet is contacted with the conductive braid, and the second mounting surface of the conductive sheet passes through the sole main body and is connected with the anti-static outsole of the shoe, therefore, all the conductive bodies in the composite sole structure of the invention are directly connected, thereby achieving the permanent anti-static function, leading the composite sole structure to be suitable for special environmental use, improving the stability of the electrical performance index of the static protective boot, improving the production qualification rate and the use safety of products, solving the unstable electrical performance of the production boot for protecting the static shoe for a long time, and reducing the electrical performance of the boot after long-term storage, the condition of hidden danger is brought to the on-duty operation of the electrostatic protection post.

Drawings

FIG. 1 is an exploded view of the composite sole structure of the present invention;

FIG. 2 is a schematic cross-sectional view of a composite sole structure of the present invention;

fig. 3 is a longitudinal sectional view of the composite type sole structure of the present invention.

Detailed Description

The invention is described in detail below with reference to the figures and examples. It is to be understood, however, that the drawings are provided solely for the purposes of promoting an understanding of the invention and that they are not to be construed as limiting the invention.

Example one

As shown in fig. 1 to 3, the composite sole structure provided in this embodiment includes a sole main body 100, a conductive webbing 200, a conductive sheet 300, an anti-static outsole 400, a filling core 500, and an insole 600; the insole 600, the sole body 100 and the anti-static outsole 400 are sequentially connected from top to bottom, the filling core 500, the conductive braid 200 and the conductive sheet 300 are sequentially embedded in the heel part of the sole body 100 from top to bottom, the upper mounting surface 501 of the filling core 500 is fixed (for example, bonded and fixed) on the insole 600, the conductive braid 200 is fixed (for example, bonded and fixed) on the lower mounting surface 502 of the filling core 500, the first mounting surface 301 on the conductive sheet 300 is in contact with the conductive braid 200, and the second mounting surface 302 of the conductive sheet 300 penetrates through the sole body 100 to be connected with the anti-static outsole 400.

In the above embodiment, preferably, the composite sole structure is manufactured and molded by an upper-connecting injection process, the insole 600 is fixed at the bottom of the side mold of the mold, the filling core 500 is fixed at the bottom of the heel part of the insole 600, the conductive braid 200 is longitudinally fixed on the lower mounting surface 502 of the filling core 500, the anti-static outsole 400 is placed in the bottom mold of the mold, the second mounting surface 302 of the conductive strip 300 is connected to the heel part of the anti-static outsole 400, the first mounting surface 301 of the conductive strip 300 is in contact with the conductive braid 200, the liquid sole main body 100 is formed in the mold by foaming, the conductive strip 200, the conductive strip 300, the anti-static outsole 400, the filling core 500 and the insole 600 are integrated at one time, and the conductors in the composite sole structure are directly connected, so as to achieve a permanent anti-static function, and make the composite sole structure suitable for use in a dedicated environment.

In the above embodiment, preferably, the second mounting surface 302 of the conductive plate 300 is in a V-shaped structure, the slot 401 is formed on the heel portion of the anti-static outsole 400, and the second mounting surface 302 of the conductive plate 300 is inserted into the slot 401, so that the conductive plate 300 is fixedly connected to the heel portion of the anti-static outsole 400.

In the above embodiments, the sole body 100 may be made of PU material.

In the above embodiments, the anti-static outsole 400 is preferably made of rubber, so that it has a good anti-static value.

In the above embodiment, the filler 500 is preferably made of Osley.

Example two

The embodiment provides a preparation formula of an antistatic outsole 400, which comprises the following components in parts by mass: 60-70 parts of nitrile rubber, 8-13 parts of natural rubber, 15-20 parts of butadiene rubber, 3-5 parts of carbon nanotubes, 0.5-1 part of stearic acid, 2-3 parts of an active agent, 4-5 parts of zinc oxide, 35-45 parts of fillers, 1-1.5 parts of sulfur and 0.1-0.15 part of an accelerator TS (tetramethylthiuram monosulfide).

In this embodiment, it is preferable that the nitrile rubber is 70 parts, the natural rubber is 10 parts, and the butadiene rubber is 20 parts; 3-5 parts of carbon nano-tubes, 0.5-1 part of stearic acid, 2-3 parts of an active agent, 4-5 parts of zinc oxide and 35-45 parts of filling materials.

In the present embodiment, it is preferable that the nitrile rubber is 67 parts, the natural rubber is 13 parts, and the butadiene rubber is 20 parts; 3-5 parts of carbon nano-tubes, 0.5-1 part of stearic acid, 2-3 parts of an active agent, 4-5 parts of zinc oxide and 35-45 parts of filling materials.

In this embodiment, it is preferable that the nitrile rubber is 70 parts, the natural rubber is 13 parts, and the butadiene rubber is 17 parts; 3-5 parts of carbon nano-tubes, 0.5-1 part of stearic acid, 2-3 parts of an active agent, 4-5 parts of zinc oxide and 35-45 parts of fillers.

In this embodiment, the fillers preferably include antioxidant trimethyldihydroquinoline polymer RD, mercaptobenzimidazole MB, polyethylene glycol PEG-4000, and white carbon black.

Based on the formulation for manufacturing the anti-static outsole 400 in the above embodiments, the present embodiment also provides a method for manufacturing the anti-static outsole 400. Which comprises the following steps:

1) preparing nitrile rubber, natural rubber, a carbon nanotube and fillers according to the mass ratio, then adding the materials into a ten-thousand-horsepower internal mixer together for fully stirring, adjusting the stirring speed and the stirring temperature in the ten-thousand-horsepower internal mixer according to the characteristics of the materials, inspecting the products in the internal mixing process, and stopping the operation of the ten-thousand-horsepower internal mixer after confirming complete internal mixing to obtain a primary blank.

2) And (3) inspecting the primary blank material, after the primary blank material is qualified, taking a proper amount of the primary blank material according to the condition of the order, placing the primary blank material in an open mill for open milling, adding sulfur and an accelerator TS according to a corresponding proportion, and carrying out complete reaction on the open mill product.

3) And transferring the milled product to a vulcanization workshop, setting the temperature of the mold to be constant at 150-155 ℃, and then carrying out compression molding on the product.

4) The quality of the molded anti-static outsole 400 is checked.

Firstly, the quality inspection is carried out to see whether the conditions of material shortage, bad exhaust and the like exist or not, then, the experiments of wear resistance, frost spitting and the like are carried out,

according to the above preparation formula and preparation method, the rubber test piece of the anti-static shoe outsole 400 is made to perform physical property detection, the physical and chemical indexes are shown in the following table 1,

TABLE 1 indexes of physical properties of rubber test pieces of antistatic shoe outsoles 400

Note that the rubber test piece for the above physical property test was 2 mm.

EXAMPLE III

The embodiment provides a manufacturing formula of a sole main body 100, which comprises the following components in parts by mass:

the component B comprises: 35-40 parts of polytetrahydrofuran ether and 60-65 parts of diphenylmethane diisocyanate (MDI for short).

In this embodiment, preferably, the ratio of component a: 50 parts of polytetrahydrofuran ether, 25 parts of 2-functional EO-capped polyether with 4000 molecular weight, 25 parts of 3-functional EO-capped polyether with 6000 molecular weight, 0.5-2 parts of polyether foam stabilizer, 0.5-1 part of glycerol and 2-3 parts of permanent antistatic agent; the component B comprises: 38 parts of polytetrahydrofuran ether and 62 parts of diphenylmethane diisocyanate.

In this embodiment, preferably, the ratio of component a: 45 parts of polytetrahydrofuran ether, 30 parts of 2-functional EO-capped polyether with 4000 molecular weight, 25 parts of 3-functional EO-capped polyether with 6000 molecular weight, 0.5-2 parts of polyether foam stabilizer, 0.5-1 part of glycerol and 2-3 parts of permanent antistatic agent; the component B comprises: 40 parts of polytetrahydrofuran ether and 60 parts of diphenylmethane diisocyanate.

Based on the manufacturing formula of the sole body 100 in the above embodiments, the present embodiment further provides a manufacturing method of the sole body 100, including the following steps:

iii) analyzing the reaction product (mixture) in the first reaction kettle, and measuring the acid value, the moisture, the hydroxyl value and the viscosity of the reaction product; when the detection reaches the standard, cooling the first reaction kettle to 45 ℃, and packaging for later use, wherein the product is a component A;

iv) putting diphenylmethane diisocyanate into the second reaction kettle in advance, and slowly putting the polytetrahydrofuran ether with a quantitative formula into the second reaction kettle; and (3) slowly heating the second reaction kettle to 70-75 ℃, reacting for 2 hours, detecting the content of isocyanate in the reaction product in the second reaction kettle (the product is finally blocked by the isocyanate, so the content is measured at this time to evaluate the reaction completeness of the product, and the reaction completeness is proved only in the equivalent range set by people), and when the required index is reached, cooling to below 45 ℃, and packaging for later use, wherein the product is a component B.

Example four

The embodiment provides a manufacturing method of a composite sole structure, which comprises the following steps:

1) heating the sole body 100 to be in a liquid state; the temperature of the die is raised to 55 ℃; bridging the surface of the anti-static outsole 400, and heating to 60 ℃;

2) sheathing the upper surface into a shoe tree and fixing the shoe tree on a side mold (also referred to as an upper mold) of the mold;

3) wrapping the periphery of the bottom of the upper surface around the insole 600, so that the insole 600 is fixed at the bottom of the side mold of the mold, and the filling core 500 is fixed at the bottom of the heel part of the insole 600; the conductive mesh belt 200 is longitudinally fixed at the bottom of the filler core 500;

4) the conductive sheet 300 is installed in the heel part of the anti-static outsole 400, then the anti-static outsole 400 is placed in the bottom die of the die, and the conductive sheet 300 is in contact with the conductive mesh belt 200;

5) and injecting the liquid sole main body 100 into the mold, and curing and molding the sole main body 100 to complete the manufacture of the composite sole structure.

EXAMPLE five

The present embodiment provides an anti-static footwear comprising the composite sole structure of any of the embodiments described above.

The present invention has been described with reference to the above embodiments, and the structure, arrangement, and connection of the respective members may be changed. On the basis of the technical scheme of the invention, the improvement or equivalent transformation of the individual components according to the principle of the invention is not excluded from the protection scope of the invention.

Claims

1. A compound sole structure which characterized in that: comprises a sole body, a conductive ribbon, a conductive sheet, an anti-static outsole, a filling core and an insole; the insole, the sole main body and the anti-static outsole are sequentially connected from top to bottom, the filling core, the conductive mesh belt and the conductive sheet are sequentially embedded in the heel part of the sole main body from top to bottom, the upper mounting surface of the filling core is fixed on the insole, the conductive mesh belt is fixed on the lower mounting surface of the filling core, the first mounting surface on the conductive sheet is in contact with the conductive mesh belt, and the second mounting surface of the conductive sheet penetrates through the sole main body to be connected with the anti-static outsole;

the second mounting surface of the conducting strip is of a V-shaped structure, a slot is formed in the heel part of the anti-static shoe outsole, and the second mounting surface of the conducting strip is placed in the slot.

2. The composite sole structure according to claim 1, wherein: the composite sole structure is manufactured and molded by adopting a connecting upper injection process.

3. The composite sole structure according to claim 1, wherein: the sole main body is made of PU material; the anti-static outsole is made of rubber; the filler is made of Osley material.

4. The composite sole structure according to claim 1, wherein the antistatic outsole is prepared from the following components in parts by mass: 60-70 parts of nitrile rubber, 8-13 parts of natural rubber, 15-20 parts of butadiene rubber, 3-5 parts of carbon nanotubes, 0.5-1 part of stearic acid, 2-3 parts of an active agent, 4-5 parts of zinc oxide, 35-45 parts of fillers, 1-1.5 parts of sulfur and 0.1-0.15 part of an accelerator TS.

5. The composite sole structure according to claim 1, wherein the sole body is prepared from the following components in parts by mass:

6. A method for manufacturing an antistatic outsole in a composite sole structure according to claim 4, wherein: the method comprises the following steps:

4) and (4) performing quality inspection on the molded anti-static outsole (400).

7. A method of manufacturing a sole body in a composite sole structure according to claim 5, comprising the steps of:

i) preparing polytetrahydrofuran ether, 2 functional EO end capping polyether with 4000 molecular weight, 3 functional EO end capping polyether with 6000 molecular weight and permanent antistatic agent according to the mass parts, then adding the mixture into a first reaction kettle, and fully stirring the mixture;

8. A method of manufacturing a composite sole structure according to any one of claims 1 to 5, characterized in that:

9. An antistatic shoe, characterized in that: comprising a composite sole structure according to any one of claims 1 to 5.