CN107556564B - Production process of waterproof and breathable rain shoes - Google Patents
Production process of waterproof and breathable rain shoes Download PDFInfo
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- CN107556564B CN107556564B CN201710926665.9A CN201710926665A CN107556564B CN 107556564 B CN107556564 B CN 107556564B CN 201710926665 A CN201710926665 A CN 201710926665A CN 107556564 B CN107556564 B CN 107556564B
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Abstract
The invention relates to a rain boot, in particular to a production process of a waterproof and breathable rain boot, which comprises the following steps of (1) preparing a boot body, adding polyurethane resin containing titanium dioxide into nitrile rubber, a reinforcing agent and auxiliary materials, uniformly mixing, mixing by a rubber mixing mill, drawing a sol mixture, and preliminarily pressing and forming the sol mixture to obtain the boot body; (2) preparing a sole; (3) connecting a shoe body with a sole, attaching the sole and a surrounding strip under the upper and the foot of the upper last, putting a sole rubber blank into a mold, heating and pressurizing, and performing vulcanization molding to obtain a finished rain shoe product; by adopting the production process of the rubber shoes provided by the invention, the shoe bodies and the soles are respectively produced and manufactured, different and corresponding functions are respectively realized, and then the shoe bodies and the soles are fused into a whole in a compression molding mode, so that the production process is simple and convenient; the prepared rain shoes have waterproof and breathable performances, and are more comfortable to wear.
Description
Technical Field
The invention relates to a pair of rain shoes, in particular to a production process of waterproof and breathable rain shoes.
Background
Rain shoes, traditionally, are shoes worn in rainy weather. Tube-shaped parts are divided into a short tube-shaped part, a middle tube-shaped part and a high tube-shaped part according to the height of the shaft. Common people often wear middle-tube-shaped and short-tube-shaped rain shoes, the tube height of the middle-tube-shaped and short-tube-shaped rain shoes is about 10cm higher than the ankle, and careers of some special breeds need the tube height to reach the high-tube-shaped rain shoes at the knee part as a labor protection article.
Generally, leather has good waterproof and breathable properties, but due to the limitations of yield and price and the increasing demand of people for leather, the development of synthetic leather products with both breathable and waterproof properties becomes a technical problem to be solved by those skilled in the art.
Waterproof and air permeability are a pair of contradictory indexes, the strict requirements of excellent waterproof performance and excellent air permeability cannot be absolutely provided, and the air permeability of the material under various activities is measured according to the objective knowledge of people in recent years. According to the research, people put forward a minimum value of 2500g/m for air permeability224h concept, from the viewpoint of hydrodynamics, the American researchers believe that as a waterproof material, the minimum hydrostatic pressure value should not be less than 1.76kg/cm2With reference indexes, the performance of various breathable waterproof materials is easy to compare.
Disclosure of Invention
The invention aims to provide a production process of waterproof and breathable rain shoes, which can ensure the using effect of the rain shoes and provide comfortable wearing requirements.
In order to achieve the purpose, the invention adopts the following technical scheme: a production process of waterproof and breathable rain shoes comprises the steps of manufacturing shoe bodies and soles respectively, then carrying out compression molding to form a whole, and specifically comprises the following steps:
(1) preparing a shoe body:
adding polyurethane resin containing titanium dioxide into nitrile rubber, a reinforcing agent and auxiliary materials, uniformly mixing, mixing by a rubber mixing mill, drawing the sol mixture, and preliminarily pressing and forming the sol mixture to obtain a shoe body;
(2) preparing a sole:
(2.1) adding the nitrile rubber, the butadiene rubber, the natural rubber, the rubber softener, the vulcanization activator and the carbon black filler into an internal mixer for banburying for 5-10min to obtain a premix;
(2.2) putting the premix and the vulcanization accelerator into a rubber mixing mill for mixing for 3-5min, then adding a foaming agent, continuing mixing for 0.5-1min, discharging to a flat machine, supplementing and turning over to obtain rubber mixture, and scribing and cooling the rubber mixture to obtain a mixed material;
(2.3) carrying out two-stage rubber mixing on the mixed material, repeatedly and uniformly mixing, and cutting into sole rubber blank pieces;
(3) the shoe body is connected with the sole:
and (3) attaching the sole and the surrounding strip under the upper and the foot of the upper last, putting the sole rubber blank into a mold, heating and pressurizing, and vulcanizing and molding to obtain the finished rain shoe.
The rain shoes are characterized in that the sole and the shoe body are manufactured respectively and then are connected into a whole through compression molding, so that the sole and the shoe body can be designed to meet respective requirements, the sole needs to have enough hardness and strength, and the shoe body needs to have both air permeability and waterproof performance.
According to the invention, through blending modification of the nitrile rubber and the polyurethane resin incompatible with the nitrile rubber, in the process of drawing a sol mixture, because the nitrile rubber and the polyurethane resin show different stretching tendencies, micropore gaps are formed at the contact interface of the nitrile rubber and the polyurethane resin, a row-column sheet structure formed by the nitrile rubber and the polyurethane resin is formed after heat treatment and is shaped, the diameters of the micropore gaps are 0.2-10 mu m, and the diameters of the micropore gaps are 1/5000-1/20000 of the diameters of water drops and are about 700 times of the diameters of water vapor molecules, so that the water drops can be prevented from passing through, and the water vapor molecules can freely pass through. Therefore, the effects of water resistance and air permeability can be achieved. In order to realize the stretching of the nitrile rubber and the polyurethane resin, the sol mixture is stretched by a differential roller, the stretching ratio is 1.2-2.5, when the stretching ratio is too low, a large enough micropore gap is not easy to form, and when the stretching ratio is too high, the sol mixture is easy to be broken.
In the invention, titanium dioxide is also filled in the polyurethane resin, and the titanium dioxide also forms a cellular structure taking the titanium dioxide as a core in the process of stretching the sol mixture, in order to ensure that the titanium dioxide is uniformly dispersed in a polymer, the titanium dioxide is coated and modified by polyethylene glycol, further, the particle size of the titanium dioxide is 0.1-0.4 mu m, the particle size of the titanium dioxide is too small, a proper cellular structure is not easy to form, and the particle size is too large, so that the sol mixture is easy to break in the stretching process.
According to the invention, in the step (2.2), the temperature of the rubber mixing mill is 90-110 ℃, and the pressure is 0.35-0.40 Mpa.
According to the present invention, in the step (2.3) of the present invention, the temperature of the two-stage mixing method is 40 to 60 ℃.
According to the invention, in the step (3), in order to ensure that the shoe body and the sole are connected together in a fusing way and simultaneously ensure the vulcanization of the shoe body and the sole, the assembled rain shoes are put into a vulcanizing tank for vulcanization treatment, wherein the vulcanization temperature is 150 ℃ and 155 ℃, and the pressure is 0.30-0.40 MPa.
According to the invention, the reinforcing agent is an additive which is commonly used in the rubber modification processing process and is used for improving the strength of rubber, the type of the reinforcing agent is not specially required, and the reinforcing agent can be one or a mixture of more of white smoke, black smoke and kaolin, which are commonly known by the technical personnel in the field.
The auxiliary materials are some additives commonly used in the rubber processing process, and the invention is not repeated in this respect.
According to the invention, the rubber softener is prepared by mixing dibutyl phthalate, rubber softening oil and pine tar.
According to the invention, the vulcanizing activator is nano zinc oxide and stearic acid, and the weight parts of the nano zinc oxide and the stearic acid are 1: (0.1-0.3) mixing.
According to the invention, the vulcanization accelerator is one or a combination of more than two of N-cyclohexyl-2-benzothiazole sulfonamide, N-tertiary butyl-2-benzothiazole sulfonamide, 2' -dibenzothiazyl disulfide, tetramethylthiuram monosulfide, 2-thiol benzothiazole and tetramethylthiuram disulfide.
The shoe body comprises the following components in parts by weight: 30-42 parts of nitrile rubber, 0.1-1 part of reinforcing agent, 1-8 parts of polyurethane resin and 0.01-0.05 part of titanium dioxide.
The sole comprises the following components in parts by weight: 20-32 parts of nitrile rubber, 10-15 parts of butadiene rubber, 3-10 parts of natural rubber, 0.1-0.5 part of rubber softener, 0.02-0.1 part of vulcanization activator, 0.01-0.5 part of carbon black filler and 0.1-0.5 part of vulcanization accelerator.
The invention has the technical effects that:
1. by adopting the production process of the rubber shoes provided by the invention, the shoe bodies and the soles are respectively produced and manufactured, different and corresponding functions are respectively realized, and then the shoe bodies and the soles are fused into a whole in a compression molding mode, so that the production process is simple and convenient;
2. the rain shoes prepared by the invention have waterproof and breathable performances, and are more comfortable to wear.
Detailed Description
In order to make the technical means, the creation features, the achievement purposes and the effects of the invention easy to understand, the invention is further clarified with the specific embodiments.
Example 1
A production process of waterproof and breathable rain shoes comprises the following steps:
(1) preparation of shoe body
The shoe body comprises the following substances in parts by weight: 36 parts of nitrile rubber, 0.5 part of white smoke, 5 parts of polyurethane resin and 0.03 part of titanium dioxide;
adding polyurethane resin containing titanium dioxide into nitrile rubber, white smoke and auxiliary materials, uniformly mixing, mixing by a rubber mixing mill, drawing the sol mixture with the tensile rate of 2, and preliminarily pressing and forming the sol mixture to obtain a shoe body; the titanium dioxide is coated by polyethylene glycol, and the particle size of the titanium dioxide is 0.3 mu m;
(2) preparation of shoe soles
The sole comprises the following components in parts by weight: 26 parts of nitrile rubber, 13 parts of butadiene rubber, 6 parts of natural rubber, 0.3 part of rubber softener, 0.07 part of vulcanization activator, 0.3 part of carbon black filler and 0.3 part of N-cyclohexyl-2-benzothiazole sulfonamide;
(2.1) adding the nitrile rubber, the butadiene rubber, the natural rubber, the rubber softener, the vulcanization activator and the carbon black filler into an internal mixer for banburying for 6min to obtain a premix;
(2.2) putting the premix and the N-cyclohexyl-2-benzothiazole sulfonamide into a rubber mixing mill for refining for 4min, wherein the temperature of the rubber mixing mill is 100 ℃, the pressure is 0.38Mpa, then adding a foaming agent, continuously refining for 0.7min, discharging to a flat machine, supplementing and uniformly turning to obtain mixed rubber, and scribing and cooling the mixed rubber to obtain mixed rubber;
(2.3) carrying out two-stage rubber mixing on the mixed material, wherein the temperature of the two-stage rubber mixing is 50 ℃, repeatedly softening and uniformly mixing, and cutting into sole rubber blank sheets;
(3) the shoe body is connected with the sole
And (3) attaching the sole and the surrounding strip under the upper and the foot of the stretched last, putting the sole rubber blank into a mold, heating and pressurizing, putting the assembled rain boot into a vulcanizing tank for vulcanization treatment at the vulcanization temperature of 152 ℃ and the pressure of 0.35Mpa, and obtaining the finished rain boot.
Example 2
A production process of waterproof and breathable rain shoes comprises the following steps:
(1) preparation of shoe body
The shoe body comprises the following substances in parts by weight: 30 parts of nitrile rubber, 0.1 part of black smoke, 1 part of polyurethane resin and 0.01 part of titanium dioxide;
adding polyurethane resin containing titanium dioxide into nitrile rubber, black smoke and auxiliary materials, uniformly mixing, mixing by a rubber mixing mill, drawing the sol mixture with the tensile rate of 1.2, and preliminarily pressing and forming the sol mixture to obtain a shoe body; the titanium dioxide is coated by polyethylene glycol, and the particle size of the titanium dioxide is 0.1 mu m;
(2) preparation of shoe soles
The sole comprises the following components in parts by weight: 20 parts of nitrile rubber, 10 parts of butadiene rubber, 3 parts of natural rubber, 0.1 part of rubber softener, 0.02 part of vulcanization activator, 0.01 part of carbon black filler and 0.1 part of N-tert-butyl-2-benzothiazole sulfonamide;
(2.1) adding the nitrile rubber, the butadiene rubber, the natural rubber, the rubber softener, the vulcanization activator and the carbon black filler into an internal mixer for banburying for 5min to obtain a premix;
(2.2) putting the premix and N-tert-butyl-2-benzothiazole sulfonamide into a rubber refining machine for refining for 3min, wherein the temperature of the rubber refining machine is 90 ℃, and the pressure is 0.35Mpa, then adding a foaming agent, continuously refining for 0.5min, discharging to a flat machine, supplementing and uniformly turning to obtain rubber compound, and scribing and cooling the rubber compound to obtain a mixed compound;
(2.3) carrying out two-stage rubber mixing on the mixed material, wherein the temperature of the two-stage rubber mixing is 40 ℃, repeatedly softening and uniformly mixing, and cutting into sole rubber blank sheets;
(3) the shoe body is connected with the sole
Attaching the sole and the surrounding strip under the upper and the foot of the upper last, putting the sole rubber blank into a mould, heating and pressurizing, putting the assembled rain boot into a vulcanizing tank for vulcanization treatment at the vulcanization temperature of 150 ℃ and the pressure of 0.30Mpa, and obtaining the finished rain boot.
Example 3
A production process of waterproof and breathable rain shoes comprises the following steps:
(1) preparation of shoe body
The shoe body comprises the following substances in parts by weight: 42 parts of nitrile rubber, 1 part of kaolin, 8 parts of polyurethane resin and 0.05 part of titanium dioxide;
adding polyurethane resin containing titanium dioxide into nitrile rubber, kaolin and auxiliary materials, uniformly mixing, mixing by a rubber mixing mill, drawing the sol mixture with the tensile rate of 2.5, and preliminarily pressing and forming the sol mixture to obtain a shoe body; the titanium dioxide is coated by polyethylene glycol, and the particle size of the titanium dioxide is 0.4 mu m;
(2) preparation of shoe soles
The sole comprises the following components in parts by weight: 32 parts of nitrile rubber, 15 parts of butadiene rubber, 10 parts of natural rubber, 0.5 part of rubber softener, 0.1 part of vulcanization activator, 0.5 part of carbon black filler and 0.5 part of 2-thiol benzothiazole;
(2.1) adding the nitrile rubber, the butadiene rubber, the natural rubber, the rubber softener, the vulcanization activator and the carbon black filler into an internal mixer for banburying for 10min to obtain a premix;
(2.2) putting the premix and 2-thiol benzothiazole into a rubber mixing mill for refining for 5min, wherein the temperature of the rubber mixing mill is 110 ℃, the pressure is 0.40Mpa, then adding a foaming agent, continuing refining for 1min, discharging to a flat machine, supplementing and uniformly turning to obtain mixed rubber, and scribing and cooling the mixed rubber to obtain mixed rubber;
(2.3) carrying out two-stage rubber mixing on the mixed material, wherein the temperature of the two-stage rubber mixing is 60 ℃, repeatedly mixing and softening uniformly, and cutting into sole rubber blank sheets;
(3) the shoe body is connected with the sole
And (3) attaching the sole and the surrounding strip under the upper and the foot of the stretched last, putting the sole rubber blank into a mold, heating and pressurizing, putting the assembled rain boot into a vulcanizing tank for vulcanization treatment at the vulcanization temperature of 155 ℃ and the pressure of 0.40Mpa, and obtaining the finished rain boot.
Comparative example 1
This example is the same as the production process of example 1, except that the sol mixture is not drawn during the production of the shoe body. The specific production process comprises the following steps:
a production process of waterproof and breathable rain shoes comprises the following steps:
(1) preparation of shoe body
The shoe body comprises the following substances in parts by weight: 36 parts of nitrile rubber, 0.5 part of white smoke, 5 parts of polyurethane resin and 0.03 part of titanium dioxide;
adding polyurethane resin containing titanium dioxide into nitrile rubber, white smoke and auxiliary materials, uniformly mixing, mixing by a rubber mixing mill, and preliminarily pressing and molding the sol mixture to obtain a shoe body; the titanium dioxide is coated by polyethylene glycol, and the particle size of the titanium dioxide is 0.3 mu m;
(2) preparation of shoe soles
The sole comprises the following components in parts by weight: 26 parts of nitrile rubber, 13 parts of butadiene rubber, 6 parts of natural rubber, 0.3 part of rubber softener, 0.07 part of vulcanization activator, 0.3 part of carbon black filler and 0.3 part of N-cyclohexyl-2-benzothiazole sulfonamide;
(2.1) adding the nitrile rubber, the butadiene rubber, the natural rubber, the rubber softener, the vulcanization activator and the carbon black filler into an internal mixer for banburying for 6min to obtain a premix;
(2.2) putting the premix and the N-cyclohexyl-2-benzothiazole sulfonamide into a rubber mixing mill for refining for 4min, wherein the temperature of the rubber mixing mill is 100 ℃, the pressure is 0.38Mpa, then adding a foaming agent, continuously refining for 0.7min, discharging to a flat machine, supplementing and uniformly turning to obtain mixed rubber, and scribing and cooling the mixed rubber to obtain mixed rubber;
(2.3) carrying out two-stage rubber mixing on the mixed material, wherein the temperature of the two-stage rubber mixing is 50 ℃, repeatedly softening and uniformly mixing, and cutting into sole rubber blank sheets;
(3) the shoe body is connected with the sole
And (3) attaching the sole and the surrounding strip under the upper and the foot of the stretched last, putting the sole rubber blank into a mold, heating and pressurizing, putting the assembled rain boot into a vulcanizing tank for vulcanization treatment at the vulcanization temperature of 152 ℃ and the pressure of 0.35Mpa, and obtaining the finished rain boot.
The finished rain shoes of examples 1 to 3 and comparative example 1 were subjected to the tests for waterproof property and air permeability, and the test results were recorded in table 1.
Table 1:
| air permeability/(g/m)2·24h) | Hydrostatic pressure value/(kg/cm)2) | |
| Example 1 | 2985 | 2.05 |
| Example 2 | 2934 | 1.97 |
| Example 3 | 2912 | 1.92 |
| Comparative example 1 | 856 | 2.97 |
The data show that the waterproof and breathable rain shoes provided by the invention have waterproof and breathable performances.
The foregoing shows and describes the general principles, essential features, and inventive features of this invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (1)
1. The utility model provides a production technology of waterproof ventilative rain shoes, includes the preparation shoes body and sole respectively, then compression molding even as an organic whole, its characterized in that: the method specifically comprises the following steps:
(1) preparing a shoe body:
adding polyurethane resin containing titanium dioxide into nitrile rubber, a reinforcing agent and auxiliary materials, uniformly mixing, mixing by a rubber mixing mill, drawing a sol mixture by a differential roller, and preliminarily pressing and forming the sol mixture to obtain a shoe body;
(2) preparing a sole:
(2.1) adding the nitrile rubber, the butadiene rubber, the natural rubber, the rubber softener, the vulcanization activator and the carbon black filler into an internal mixer for banburying for 5-10min to obtain a premix;
(2.2) putting the premix and the vulcanization accelerator into a rubber mixing mill for mixing for 3-5min, then adding a foaming agent, continuing mixing for 0.5-1min, discharging to a flat machine, supplementing and turning over to obtain rubber mixture, and scribing and cooling the rubber mixture to obtain a mixed material;
(2.3) carrying out two-stage rubber mixing on the mixed material, repeatedly and uniformly mixing, and cutting into sole rubber blank pieces;
(3) the shoe body is connected with the sole:
attaching a sole and a surrounding strip under the upper and the foot of the upper last, putting a sole rubber blank into a mold, heating and pressurizing, and performing vulcanization molding to obtain a finished rain shoe product;
in the step (1), the elongation of the sol mixture is 1.2-2.5;
in the step (1), the titanium dioxide is coated and modified by polyethylene glycol;
the particle size of the titanium dioxide is 0.1-0.4 μm;
in the step (2.2), the temperature of the rubber mixing machine is 90-110 ℃, and the pressure is 0.35-0.40 Mpa;
in the step (2.3), the temperature of the two-stage rubber mixing method is 40-60 ℃;
in the step (3), the assembled rain shoes are put into a vulcanizing tank for vulcanization treatment, wherein the vulcanization temperature is 150-155 ℃, and the pressure is 0.30-0.40 Mpa.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104804233A (en) * | 2015-04-26 | 2015-07-29 | 青岛保利康新材料有限公司 | Waterproof and skid-proof rubber rain shoes |
| CN105949535A (en) * | 2016-07-20 | 2016-09-21 | 南京东亚橡塑制品有限公司 | Waterproof anti-slip rain boot sole material |
| CN105968442A (en) * | 2016-07-20 | 2016-09-28 | 南京东亚橡塑制品有限公司 | Preparation method of waterproof and anti-skidding sole material for rain shoes |
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- 2017-10-08 CN CN201710926665.9A patent/CN107556564B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104804233A (en) * | 2015-04-26 | 2015-07-29 | 青岛保利康新材料有限公司 | Waterproof and skid-proof rubber rain shoes |
| CN105949535A (en) * | 2016-07-20 | 2016-09-21 | 南京东亚橡塑制品有限公司 | Waterproof anti-slip rain boot sole material |
| CN105968442A (en) * | 2016-07-20 | 2016-09-28 | 南京东亚橡塑制品有限公司 | Preparation method of waterproof and anti-skidding sole material for rain shoes |
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