Low-smoke bicycle inner tube formula

Abstract

The invention discloses a low-smoke bicycle inner tube formula which comprises the following components in parts by weight: 17-26 parts of natural rubber, 65-100 parts of reclaimed rubber, 1-3 parts of zinc oxide, 0.8-2 parts of stearic acid, 2.5-4 parts of an anti-aging agent, 0.8-1.5 parts of microcrystalline wax, 0.5-1 part of bonding resin, 0.5-3 parts of magnesium aluminum silicate, 11-20 parts of carbon black, 25-50 parts of light calcium carbonate, 3-8 parts of aromatic oil, 0.5-1.5 parts of sulfur, 1-3 parts of an accelerant CZ / NS and 0.5-1 part of a scorch retarder CTP. According to the bicycle inner tube rubber material, the magnesium aluminum silicate is added, and the characteristics of large surface area and developed microporous system of the magnesium aluminum silicate are utilized, so that partial adsorption inhibition of volatile organic compounds generated in the raw materials and the production process is effectively realized. The magnesium aluminum silicate has good compatibility with natural rubber and synthetic rubber, and has the characteristics of low abrasion, low stacking density and the like, and the tear resistance is improved to a certain extent.

Description

Technical Field

[0001] The invention relates to a formula for a bicycle inner tube and belongs to the technical field of tire manufacturing. Background Art

[0002] Smoke is generated in the production process of the mixing workshop and the vulcanization workshop. The main sources are the release of organic matter with low boiling points in the raw materials, and the production of harmful substances by chemical reactions during the high-temperature plasticization and processing of the raw materials. The main components are sulfides and different types of volatile organic compounds such as alkanes, benzenes, and olefins. At present, there is no accurate and comprehensive identification of its components at home and abroad. In particular, in the "Emission Standard of Pollutants for Rubber Products Industry" (GB27623-2011), the impact of smoke on the environment is further clarified.

[0003] Magnesium aluminum silicate is an isomorphous silicate formed by weathering of glassy volcanic rocks. It is a derivative of silicon oxide with a high magnesium content, mainly trioctahedral montmorillonite. It is a functional powder material with a special physical structure. It has the characteristics of high whiteness, high oil absorption value, high specific surface area, low abrasion, low bulk density, etc. It can be widely used in medicine, daily chemical industry, engineering plastics, rubber, detergents, coatings, paints and other fields.

[0004] Because magnesium aluminum silicate has a very large specific surface area, a very developed microporous system, and good compatibility with natural rubber and synthetic rubber, it can be used as an absorbent and adsorbent in the production of rubber materials, effectively absorbing and inhibiting the volatile release of low-boiling organic matter in the raw materials. Magnesium aluminum silicate is used in the design of bicycle inner tube formulas. After the total volatile organic compound (TVOC) and non-methane total hydrocarbon (NMHC) tests, the smoke release is significantly improved, and compared with the traditional formula, the tear resistance is also improved to a certain extent. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a low-smoke bicycle inner tube formula.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: The low smoke bicycle inner tube formula provided by the present invention comprises the following components in parts by weight: Natural rubber: 17-26, reclaimed rubber: 65-100, zinc oxide: 1-3, stearic acid: 0.8-2, antioxidant: 2.5-4, microcrystalline wax: 0.8-1.5, adhesive resin: 0.5-1, magnesium aluminum silicate: 0.5-3, carbon black: 11-20, light calcium: 25-50, aromatic oil: 3-8, sulfur: 0.5-1.5, accelerator CZ / NS: 1-3, anti-scorch agent CTP: 0.5-1.

[0007] As an innovation point of the present invention, on the basis of the prior art, magnesium aluminum silicate is added into the formula to achieve partial adsorption inhibition of volatile organic compounds generated by raw materials and production processes.

[0008] With respect to the low smoke bicycle inner tube formula of the present invention, the rubber compound mixing process of the present invention can be operated according to the prior art without other special steps.

[0009] Compared with the prior art, the present invention has the following beneficial effects:

[0010] 1. The bicycle inner tube rubber material of the present invention is added with magnesium aluminum silicate, which utilizes the characteristics of large surface area and developed micropore system to effectively achieve partial adsorption inhibition of volatile organic compounds generated in raw materials and production processes.

[0011] 2. Magnesium aluminum silicate has good compatibility with natural rubber and synthetic rubber, and has the characteristics of low wear and low bulk density, and its tear resistance is improved to a certain extent. Implementation

[0012] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict, and the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0013] Example 1 The low smoke bicycle inner tube formula provided in this embodiment comprises the following components in parts by weight: Natural rubber: 20, reclaimed rubber: 85, zinc oxide: 2.5, stearic acid: 1, antioxidant: 3.2, microcrystalline wax: 1, adhesive resin: 0.7, magnesium aluminum silicate: 1, carbon black N660: 14.5, light calcium: 39, aromatic oil: 4.5, sulfur: 0.8, accelerator CZ / NS: 2.5, anti-scorch agent CTP: 0.5.

[0014] Example 2 The low smoke bicycle inner tube formula provided in this embodiment comprises the following components in parts by weight: Natural rubber: 17, reclaimed rubber: 65, zinc oxide: 2, stearic acid: 0.8, antioxidant: 2.5, microcrystalline wax: 0.8, adhesive resin: 0.5, magnesium aluminum silicate: 0.7, carbon black N660: 11.3, light calcium: 30, aromatic oil: 3.7, sulfur: 0.6, accelerator CZ / NS: 1.5, anti-scorch agent CTP: 0.5.

[0015] Example 3 The low smoke bicycle inner tube formula provided in this embodiment comprises the following components in parts by weight: Natural rubber: 25, reclaimed rubber: 98, zinc oxide: 3, stearic acid: 1.5, antioxidant 4, microcrystalline wax: 1.2, adhesive resin: 0.9, magnesium aluminum silicate: 3, carbon black N660: 16, light calcium: 47, aromatic oil: 6, sulfur: 1.1, accelerator CZ / NS: 3, anti-scorch agent CTP: 0.8.

[0016] Physical and chemical data analysis of the tires of the above embodiments Main experimental equipment: MZ-4000D (Jiangsu Mingzhu tensile machine), GT-7080S2 (Dongguan High-speed Railway Instrument Company), GT-M2000A (Dongguan High-speed Railway Instrument Company), DMAQ800 (TA Company, USA), Nutech3000 portable methane / non-methane total hydrocarbon analyzer (Nanjing Youtai Technology).

[0017] Comparison of vulcanization characteristics: project Example 1 Example 2 Example 3 Test temperature (℃) 175 175 175 ML / (dN.M) 1.85 1.38 1.90 MH / (dN.M) 9.30 8.60 10.20 tS1 / min 1.00 0.97 1.00 tC90 / min 2.00 1.75 2.08 Mooney viscosity (ML1+4, 100) 30 28 32 Shore hardness (°A) 64 63 66 300% elongation (Mpa) 5.9 5.9 6.1 Tensile strength (Mpa) 8.5 8.2 8.7 Elongation at break (%) 416 400 424 Tear strength (kN / m) 33.2 32 34.3 <![CDATA[Total Volatile Organic Compounds (TVOC) in the Banbury Mixing Shop (mgc / m 3 )]]> 23.58 24.32 22.20 <![CDATA[Internal mixer workshop NMHC (mgc / m 3 )]]> 22.69 23.10 21.02 <![CDATA[TVOC in vulcanization workshop (mgc / m 3 )]]> 9.75 10.81 9.22 <![CDATA[Sulfur vulcanization workshop NMHC (mgc / m 3 )]]> 8.54 8.98 8.21

[0018] The embodiments of the present invention disclosed above are only used to help illustrate the present invention. The embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. According to the content of this specification, many modifications and changes can be made. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well.

Claims

1. A low smoke bicycle inner tube formula, characterized in that: The composition comprises the following components in parts by weight: Natural rubber: 17-26, reclaimed rubber: 65-100, zinc oxide: 1-3, stearic acid: 0.8-2, antioxidant: 2.5-4, microcrystalline wax: 0.8-1.5, adhesive resin: 0.5-1, magnesium aluminum silicate: 0.5-3, carbon black: 11-20, light calcium: 25-50, aromatic oil: 3-8, sulfur: 0.5-1.5, accelerator CZ / NS: 1-3, anti-scorch agent CTP: 0.5-1.

2. The low smoke bicycle inner tube formula according to claim 1, characterized in that: The invention comprises 0.5-3 parts by weight of magnesium aluminum silicate.