Composite material of airtight layer of tire and preparation method thereof
A composite material and airtight layer technology, applied in the direction of chemical instruments and methods, coatings, layered products, etc., can solve problems such as the inability to reduce costs, achieve low manufacturing costs, simplify the molding process, and meet the effects of mechanical properties
Active Publication Date: 2014-04-02
BEIJING UNIV OF CHEM TECH
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Problems solved by technology
Although some companies such as Bridgestone and ExxonMobil have developed new tire inner liners, they have not fundamentally changed the use of halogenated butyl rubber and cannot reduce costs.
Method used
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[0027] Such as figure 1 As shown in 2, the tire inner liner 1 of the present invention has an alternating layer structure, which presents an alternating multilayer structure composed of polyvinyl alcohol (PVOH) and natural rubber (NR). The total number of layers and the thickness of each layer are based on the airtightness The airtightness and mechanical properties of the layer are determined. The PVOH layer 3 is mainly used to ensure the airtightness of the composite material, and the NR layer 2 is mainly used to ensure the mechanical strength of the composite material. The NR layer 2 can also be replaced by other rubber materials with good mechanical properties and low prices. In the working state, the mechanical states of PVOH and NR are different. In order not to affect the mechanical properties of the composite material, the PVOH layer 3 is thinner than the NR layer 2. The upper and lower layers of the composite material are both NR layer 2. One is to avoid affecting the b...
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The invention discloses a composite material of an airtight layer of a tire and a preparation method thereof. The composite material has an alternate multi-layer structure consisting of polyvinyl alcohol (PVOH) of a separation layer and rubber of a base layer, wherein the thickness of the rubber layer is greater than that of the PVOH layer; the structural form of the composite material is rubber / PVOH / rubber...rubber / PVOH / rubber; and the upper and lower surface layers are both a rubber layer. The preparation method comprises the following steps of: firstly, preparing a PVOH solution and a mixed rubber piece; coating the PVOH solution on a single surface of the mixed rubber piece; after the moisture in the PVOH coating is evaporated to dryness, folding the rubber piece and pressing into a single-layer separation sheet with a certain thickness; folding the single-layer separation sheet for multiple times and thinning to finally obtain an alternate multi-layer sheet with a layered structure; and cutting the alternate multi-layer sheet and placing in a vulcanizing machine for vulcanization to obtain the composite material of the airtight layer of the tire. In the invention, the airtight layer has an alternate multi-layer composite structure; and as the mixed rubber has perfect mechanical performance and the PVOH has perfect separation performance, the separation performance of the composite material is improved while meeting the requirement for the mechanical performance.
Description
[0001] The invention belongs to the field of polymer composite materials, and relates to a composite material special for tire inner liners, in particular to a method for preparing a tire inner liner composite material in an alternating multilayer manner. Background technique [0002] With the rapid development of my country's automobile industry, the demand for rubber tires is increasing. Because tubeless tires are better than ordinary tires in terms of safety and reliability, they also have the characteristics of light weight, good heat dissipation, and lower overall costs, so they are recognized by more and more people. Tubeless tires have a rubber layer with good airtightness inside the carcass. The inner wall of the tire and the airtight layer of the bead are used to ensure good airtightness between the tire and the rim, thus replacing the role of the traditional inner tube. The outer tube also serves as the inner tube. effect. [0003] The main function of the tire inner lin...
Claims
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IPC IPC(8): B32B25/08B32B27/28B29C43/24B29C43/20B29C35/00B05D7/04
Inventor 杨卫民钟雁焦志伟谢鹏程丁玉梅
Owner BEIJING UNIV OF CHEM TECH