Light foxing rubber for shoes and preparation method of light foxing rubber

Abstract

The invention discloses light foxing rubber for shoes and a preparation method of the light foxing rubber. The high-styrene rubber is prepared from the following raw materials in parts by weight: 95-105 parts of standard rubber, 1.4-1.8 parts of sulfur, 2.4-3.2 parts of a vulcanization accelerator, 2.5-3.5 parts of stearic acid, 4.0-5.0 parts of nano-zinc oxide, 15-19 parts of an environment-friendly rubber plasticizer, 4.5-5.5 parts of an anti-aging agent, 0.6-1.0 part of a brightener, 1.5-2.5 parts of polyethylene glycol, 22-26 parts of white carbon black, 3-5 parts of environment-friendly odorless tackifying resin, 15-25 parts of hollow glass beads and 8.0-12.0 parts of rubber black master batch. According to the invention, natural rubber and high styrene are used together, and the ratio of a rubber material related system is adjusted, so that the rubber shoe vulcanization time is 40 minutes, and the vulcanization temperature is 120 DEG C. And the lightweight targets of high performance and low specific gravity (lower than 1.05) of the product are achieved through low-temperature rapid vulcanization.

Description

Technical Field

[0001] The invention relates to a lightweight circumference rubber for shoes and a preparation and application method thereof, belonging to the technical field of shoe rubber preparation. Background Art

[0002] There are many different proportions of shoe edge rubber according to the needs of use. The tensile strength and elongation of black rubber shoe edges under normal use conditions are relatively low, generally at a tensile strength of 6-8.5MPa, an elongation of 220-380%, an adhesive strength of more than 2.0N / mm, and a specific gravity of more than 1.25, which gives people a heavy feeling during use. If the black rubber is mainly made of white carbon black, it has high hardness, low tensile strength, poor adhesion, and low durability. The above properties lead to many deficiencies in the use of vulcanized rubber as shoe edge rubber, and it is difficult to meet the needs of durable and lightweight use.

[0003] In the existing technology, due to the existence of problems such as the high specific weight of the shoe edge, the high amount of rubber used, and the heavy weight of the shoes, it cannot meet the needs of enterprises for low energy consumption and efficient production of rubber shoes, and does not meet the requirements of lightweight use under the new situation. In order to meet the luxury consumption characteristics of high-end consumers in the market, enterprises urgently need a lightweight shoe edge rubber to achieve the goal of lightweight rubber shoes. Summary of the invention

[0004] The purpose of the present invention is to provide a lightweight wainscoting rubber for shoes and a preparation method thereof. The present invention uses natural rubber and high styrene in combination, adjusts the ratio of the rubber material system, and achieves a vulcanization time of 40 minutes and a vulcanization temperature of 120°C for rubber shoes. The low-temperature rapid vulcanization achieves the lightweight goal of high performance and low specific gravity (specific gravity less than 1.05) of the product, so as to overcome the shortcomings of the prior art.

[0005] The technical solution of the present invention is as follows: a lightweight wainscoting rubber for shoes is prepared from the following raw materials in parts by weight: 95 to 105 parts of standard rubber, 39 / 100 of the high styrene content of the standard rubber, 1.4 to 1.8 parts of sulfur, 2.4 to 3.2 parts of vulcanization accelerator, 2.5 to 3.5 parts of stearic acid, 4.0 to 5.0 parts of nano zinc oxide, 15 to 19 parts of environmentally friendly rubber plasticizer, 4.5 to 5.5 parts of antioxidant, 0.6 to 1.0 parts of brightener, 1.5 to 2.5 parts of polyethylene glycol, 22 to 26 parts of white carbon black, 3 to 5 parts of environmentally friendly odorless tackifying resin, 15 to 25 parts of hollow glass microspheres, and 8.0 to 12.0 parts of rubber black masterbatch.

[0006] The aforementioned lightweight shoe garter rubber is made of the following raw materials in parts by weight: 100 parts of standard rubber, 39 parts of high styrene, 1.6 parts of sulfur, 2.8 parts of vulcanization accelerator, 3.0 parts of stearic acid, 4.5 parts of nano zinc oxide, 17 parts of environmentally friendly rubber plasticizer, 5.0 parts of antioxidant, 0.8 parts of brightener, 2.0 parts of polyethylene glycol, 24 parts of white carbon black, 4 parts of environmentally friendly odorless tackifying resin, 20 parts of hollow glass microspheres, and 10 parts of rubber black masterbatch.

[0007] In the aforementioned lightweight wainscot rubber for shoes, the standard rubber is 1# standard rubber; the vulcanization accelerator is composed of 2.0 parts of accelerator BM, 0.4 parts of accelerator B and 0.4 parts of accelerator CBS per 2.8 parts of vulcanization accelerator; the antioxidant is composed of 4.0 parts of antioxidant KY-405L and 1.0 part of antioxidant SP-C per 5.0 parts of antioxidant;

[0008] The high styrene model is HS-860; the rubber black masterbatch specification is BL2510; the white carbon black specification is the precipitation method; the polyethylene glycol specification is PEG4000; the environmentally friendly odorless tackifying resin model is DT100; and the hollow glass microsphere model is HS42K.

[0009] A method for preparing a lightweight rubber band for shoes comprises the following steps:

[0010] 1) Preparation of plasticized rubber: Mix standard rubber and high styrene in a ratio of 100 / 39, mix in an internal mixer for 10-12 minutes, and then make 7 passes in an open mixer with a roll gap of zero, and mix evenly to obtain plasticized rubber with a Vickers plasticity of 0.58-0.63;

[0011] 2) Prepare the middle material: mix the vulcanization accelerator, stearic acid, nano zinc oxide, antioxidant, brightener, polyethylene glycol, rubber black masterbatch, and odorless tackifying resin together as the middle material; prepare sulfur separately, prepare white carbon black separately as the bulk material, and weigh the environmentally friendly rubber plasticizer separately;

[0012] 3) preparing the rubber mix: putting the plasticized rubber, the medium material and the large material into an internal mixer for pressing and refining for 2 minutes and 30 seconds, sweeping and refining for 15 seconds, pressing and refining for 6 minutes, sweeping and refining for 15 seconds, pressing and refining for 9 minutes, sweeping and refining for 12 minutes, adding an environmentally friendly rubber plasticizer, continuing to press and refining for 14 minutes, refining for 15 minutes and discharging the material, spreading the discharged rubber mix on the ground to cool, pulling and refining for 7-9 times at a roller distance of 3-4 mm on an open mixer, wrapping the roller, and discharging the sheet at a roller distance of 6-8 mm to obtain a sulfur-free lightweight rubber strip for shoes;

[0013] 4) Add sulfur to the lightweight shoe-use rubber strip that does not contain sulfur in an XK-400 open rubber mixer cooled by cooling water, and refine it evenly to form a semi-finished shoe-use rubber strip with a fixed pattern.

[0014] In the aforementioned method for preparing a lightweight rubber band for shoes, before step 4), the lightweight rubber band for shoes is first tested, and the test index is:

[0015] (1) Plasticity of the compounded rubber: 0.57-0.62;

[0016] (2) Take 140 grams of mixed rubber sample and add 1 gram of sulfur, mix evenly on XK-160 open rubber mixer, and conduct rapid test on the vulcanization performance of the rubber compound: the vulcanization starting point of the mixed rubber with sulfur at 143°C is 3'20"-3'50", and the Shore A hardness is 53-58 degrees;

[0017] After reaching the above indicators, proceed to step 4).

[0018] Beneficial effects of the present invention: Due to the adoption of the above technical scheme, compared with the prior art, the present invention provides a lightweight wainscoting rubber for shoes and a preparation method thereof. The present invention adopts natural rubber through the optimal combination of a vulcanization accelerator and a reinforcement system, which greatly improves the wear resistance and folding performance of durable consumer goods of the product, and the product is deeply loved by consumers. DETAILED DESCRIPTION

[0019] The present invention will be further described below in conjunction with the embodiments, but they are not intended to limit the present invention.

[0020] Embodiment 1 of the present invention: A lightweight wainscoting rubber for shoes is made of the following raw materials in parts by weight: 100 parts of standard rubber, 39 parts of high styrene, 1.6 parts of sulfur, 2.8 parts of vulcanization accelerator, 3.0 parts of stearic acid, 4.5 parts of nano zinc oxide, 17 parts of environmentally friendly rubber plasticizer, 5.0 parts of antioxidant, 0.8 parts of brightener, 2.0 parts of polyethylene glycol, 24 parts of white carbon black, 4 parts of environmentally friendly odorless tackifying resin, 20 parts of hollow glass microspheres, and 10 parts of rubber black masterbatch.

[0021] Embodiment 2 of the present invention: A lightweight shoe-use rubber strip is made of the following raw materials in parts by weight: 95 parts of standard rubber, 39 / 100 of the high styrene content of the standard rubber, 1.4 parts of sulfur, 2.4 parts of vulcanization accelerator, 2.5 parts of stearic acid, 4.0 parts of nano zinc oxide, 15 parts of environmentally friendly rubber plasticizer, 4.5 parts of antioxidant, 0.6 parts of brightener, 1.5 parts of polyethylene glycol, 22 parts of white carbon black, 3 parts of environmentally friendly odorless tackifying resin, 15 parts of hollow glass microspheres, and 8.0 parts of rubber black masterbatch.

[0022] Embodiment 3 of the present invention is a lightweight garter rubber for shoes, which is made of the following raw materials in parts by weight: 105 parts of standard rubber, 39 / 100 of the high styrene content of the standard rubber, 1.8 parts of sulfur, 3.2 parts of vulcanization accelerator, 3.5 parts of stearic acid, 5.0 parts of nano zinc oxide, 19 parts of environmentally friendly rubber plasticizer, 5.5 parts of antioxidant, 1.0 part of brightener, 2.5 parts of polyethylene glycol, 26 parts of white carbon black, 5 parts of environmentally friendly odorless tackifying resin, 25 parts of hollow glass microspheres, and 12.0 parts of rubber black masterbatch.

[0023] Embodiment 4 of the present invention: A lightweight wainscoting rubber for shoes is made of the following raw materials in parts by weight: 98 parts of standard rubber, 39 / 100 of the high styrene content of the standard rubber, 1.5 parts of sulfur, 2.6 parts of vulcanization accelerator, 2.8 parts of stearic acid, 4.3 parts of nano zinc oxide, 16 parts of environmentally friendly rubber plasticizer, 4.8 parts of antioxidant, 0.7 parts of brightener, 1.8 parts of polyethylene glycol, 23 parts of white carbon black, 4 parts of environmentally friendly odorless tackifying resin, 18 parts of hollow glass microspheres, and 9.0 parts of rubber black masterbatch.

[0024] Embodiment 5 of the present invention: A lightweight shoe-use rubber strip is made of the following raw materials in parts by weight: 102 parts of standard rubber, 39 / 100 of the high styrene content of the standard rubber, 1.7 parts of sulfur, 3.0 parts of vulcanization accelerator, 3.2 parts of stearic acid, 4.8 parts of nano zinc oxide, 18 parts of environmentally friendly rubber plasticizer, 5.2 parts of antioxidant, 0.9 part of brightener, 2.2 parts of polyethylene glycol, 25 parts of white carbon black, 4 parts of environmentally friendly odorless tackifying resin, 22 parts of hollow glass microspheres, and 11.0 parts of rubber black masterbatch.

[0025] In the above embodiment, the standard rubber is 1# standard rubber; the vulcanization accelerator is composed of 2.0 parts of accelerator BM, 0.4 parts of accelerator B and 0.4 parts of accelerator CBS per 2.8 parts of vulcanization accelerator; the antioxidant is composed of 4.0 parts of antioxidant KY-405L and 1.0 part of antioxidant SP-C per 5.0 parts of antioxidant;

[0026] The high styrene model is HS-860; the rubber black masterbatch specification is BL2510; the white carbon black specification is the precipitation method; the polyethylene glycol specification is PEG4000; the environmentally friendly odorless tackifying resin model is DT100; and the hollow glass microsphere model is HS42K.

[0027] The method for preparing the lightweight rubber band for shoes in the above embodiment comprises the following steps:

[0028] 1) Preparation of plasticized rubber: Mix standard rubber and high styrene in a ratio of 100 / 39, mix in an internal mixer for 10-12 minutes, and then make 7 passes in an open mixer with a roll gap of zero, and mix evenly to obtain plasticized rubber with a Vickers plasticity of 0.58-0.63;

[0029] 2) Prepare the middle material: mix the vulcanization accelerator, stearic acid, nano zinc oxide, antioxidant, brightener, polyethylene glycol, rubber black masterbatch, and odorless tackifying resin together as the middle material; prepare sulfur separately, prepare white carbon black separately as the bulk material, and weigh the environmentally friendly rubber plasticizer separately;

[0030] 3) preparing the rubber mix: putting the plasticized rubber, the medium material and the large material into an internal mixer for pressing and refining for 2 minutes and 30 seconds, sweeping and refining for 15 seconds, pressing and refining for 6 minutes, sweeping and refining for 15 seconds, pressing and refining for 9 minutes, sweeping and refining for 12 minutes, adding an environmentally friendly rubber plasticizer, continuing to press and refining for 14 minutes, refining for 15 minutes and discharging the material, spreading the discharged rubber mix on the ground to cool, pulling and refining for 7-9 times at a roller distance of 3-4 mm on an open mixer, wrapping the roller, and discharging the sheet at a roller distance of 6-8 mm to obtain a sulfur-free lightweight rubber strip for shoes;

[0031] 4) Add sulfur to the lightweight shoe-use rubber strip that does not contain sulfur in an XK-400 open rubber mixer cooled by cooling water, and refine it evenly to form a semi-finished shoe-use rubber strip with a fixed pattern.

[0032] Before step 4), the lightweight rubber strip for shoes is tested, and the test indicators are:

[0033] (1) Plasticity of the compounded rubber: 0.57-0.62;

[0034] (2) Take 140 grams of mixed rubber sample and add 1 gram of sulfur, mix evenly on XK-160 open rubber mixer, and conduct rapid test on the vulcanization performance of the rubber compound: the vulcanization starting point of the mixed rubber with sulfur at 143°C is 3'20"-3'50", and the Shore A hardness is 53-58 degrees;

[0035] After reaching the above indicators, proceed to step 4).

[0036] When the prepared lightweight shoe-use rubber strip is used, the semi-finished shoe-use rubber strip is pasted to make rubber shoes, and the finished rubber shoes are vulcanized and shaped at a vulcanization temperature of 120°C for 40 minutes. This rubber is suitable for making high-end rubber shoes at a low vulcanization temperature.

[0037] In order to further verify the effect of the present invention, the following experiments were carried out:

[0038] 1. The influence of high styrene on pattern clarity

[0039] Table 1

[0040] Serial number High styrene (parts) Pattern clarity Rubber performance judge 1 <20 Very unclear The rubber is soft, not good 2 20 Lack of clarity Soft rubber not good 3 30 Lack of clarity Rubber material is normal not good 4 35 Slightly clear Rubber material is normal not good 5 37 Clarity The rubber material is stable and does not deform. It's feasible, good 6 39 Clarity The rubber material is stable and does not deform. most 7 41 Clarity The rubber is hard not good

[0041] Table 1 shows that 39 parts of high styrene is preferred to achieve a clear rubber pattern without deformation.

[0042] 2. The influence of plasticity of plasticized rubber on the surface brightness of rubber

[0043] Table 2

[0044] Number Plasticity of plasticized rubber Rubber brightness and performance 1 <0.35 It shrinks greatly, is difficult to produce sheets, and is very easy to burn. 2 0.35-0.57 The rubber material has shrinkage and deformation phenomena, insufficient brightness, and burnt phenomena. 3 0.58-0.63 The process is normal, the brightness is good, the pattern is clear, and the anti-scorch performance is good. 4 0.64-0.68 The rubber compound is relatively soft, sticks to the roller, has good brightness and good anti-scorch performance.

[0045] Table 2 shows that the plasticity of plasticized rubber is 0.58-0.63, which can ensure that the rubber process is normal and the pattern clarity meets the requirements. In terms of process assurance, it has good anti-scorch stability.

[0046] 3. Influence of the amount of reinforcement system on the performance of rubber

[0047] Table 3

[0048]

[0049]

[0050] Table 4

[0051]

[0052]

[0053] Table 3 and Table 4 show that the best material ratio is: 24 parts of white carbon black, 2.0 parts of polyethylene glycol 4000#, 5.0 parts of antioxidant, 4 parts of odorless tackifying resin DT100, 17 parts of environmentally friendly rubber plasticizer, 1.6 parts of sulfur, 2.8 parts of accelerator, 3.0 parts of stearic acid (third grade), 4.5 parts of nano zinc oxide, 10 parts of rubber black masterbatch BL2510, and 0.8 parts of brightener. This ratio achieves the best process performance.

Claims

1. A lightweight rubber strip for shoes, characterized in that: The invention is made of the following raw materials in parts by weight: 95-105 parts of standard rubber, 39 / 100 of the high styrene content of the standard rubber, 1.4-1.8 parts of sulfur, 2.4-3.2 parts of vulcanization accelerator, 2.5-3.5 parts of stearic acid, 4.0-5.0 parts of nano zinc oxide, 15-19 parts of environmentally friendly rubber plasticizer, 4.5-5.5 parts of antioxidant, 0.6-1.0 parts of brightener, 1.5-2.5 parts of polyethylene glycol, 22-26 parts of white carbon black, 3-5 parts of environmentally friendly odorless tackifying resin, 15-25 parts of hollow glass microspheres, and 8.0-12.0 parts of rubber black masterbatch.

2. The lightweight rubber strip for shoes according to claim 1, characterized in that: It is made of the following raw materials in parts by weight: 100 parts of standard rubber, 39 parts of high styrene, 1.6 parts of sulfur, 2.8 parts of vulcanization accelerator, 3.0 parts of stearic acid, 4.5 parts of nano zinc oxide, 17 parts of environmentally friendly rubber plasticizer, 5.0 parts of antioxidant, 0.8 parts of brightener, 2.0 parts of polyethylene glycol, 24 parts of white carbon black, 4 parts of environmentally friendly odorless tackifying resin, 20 parts of hollow glass microspheres, and 10 parts of rubber black masterbatch.

3. A lightweight rubber strip for shoes according to claim 1 or 2, characterized in that: The standard rubber is 1# standard rubber; the vulcanization accelerator is composed of 2.0 parts of accelerator BM, 0.4 parts of accelerator B and 0.4 parts of accelerator CBS for every 2.8 parts of vulcanization accelerator; the antioxidant is composed of 4.0 parts of antioxidant KY-405L and 1.0 part of antioxidant SP-C for every 5.0 parts of antioxidant; The high styrene model is HS-860; The specification of rubber black masterbatch is BL2510; the specification of white carbon black is precipitation method; the specification of polyethylene glycol is PEG4000; the model of environmentally friendly odorless tackifying resin is DT100; the model of hollow glass microspheres is HS42K.

4. A method for preparing a lightweight rubber strip for shoes as claimed in any one of claims 1 to 3, characterized in that: The steps include: 1) Preparation of plasticized rubber: Mix standard rubber and high styrene in a ratio of 100 / 39, mix in an internal mixer for 10-12 minutes, and then make 7 passes in an open mixer with a roll gap of zero, and mix evenly to obtain plasticized rubber with a Vickers plasticity of 0.58-0.63; 2) Prepare the middle material: mix the vulcanization accelerator, stearic acid, nano zinc oxide, antioxidant, brightener, polyethylene glycol, rubber black masterbatch, and odorless tackifying resin together as the middle material; prepare sulfur separately, prepare white carbon black separately as the bulk material, and weigh the environmentally friendly rubber plasticizer separately; 3) preparing the rubber mix: putting the plasticized rubber, the medium material and the large material into an internal mixer for pressing and refining for 2 minutes and 30 seconds, sweeping and refining for 15 seconds, pressing and refining for 6 minutes, sweeping and refining for 15 seconds, pressing and refining for 9 minutes, sweeping and refining for 12 minutes, adding an environmentally friendly rubber plasticizer, continuing to press and refining for 14 minutes, refining for 15 minutes and discharging the material, spreading the discharged rubber mix on the ground to cool, pulling and refining for 7-9 times at a roller distance of 3-4 mm on an open mixer, wrapping the roller, and discharging the sheet at a roller distance of 6-8 mm to obtain a sulfur-free lightweight rubber strip for shoes; 4) Add sulfur to the lightweight shoe-use rubber strip that does not contain sulfur in an XK-400 open rubber mixer cooled by cooling water, and refine it evenly to form a semi-finished shoe-use rubber strip with a fixed pattern.

5. The method for preparing a lightweight shoe-use rubber strip according to claim 4, characterized in that: Before step 4), the lightweight rubber strip for shoes is tested, and the test indicators are: (1) Plasticity of the compounded rubber: 0.57-0.62; (2) Take 140 grams of mixed rubber sample and add 1 gram of sulfur, mix evenly on XK-160 open rubber mixer, and conduct rapid test of rubber vulcanization performance: the vulcanization starting point of the mixed rubber with sulfur at 143°C is 3'20"-3'50", and the Shore A hardness is 53-58 degrees; After reaching the above indicators, proceed to step 4).

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