Large high-pressure seamless rubber airbag and production process thereof

Abstract

The invention discloses a large high-pressure seamless rubber airbag and a production process thereof, relating to a rubber product and a production process thereof. The large high-pressure seamless rubber airbag comprises the following compositions: EPDM (ethylene-propylene-diene monomer) externally-covered rubbers with excellent weather resistance, at least four (even number) skeleton layers, a middle adhesive layer and an inner adhesive layer, wherein each skeleton layer is composed of continuous high-strength tyre cords which are mutually crossed with an angle of 90 degrees and formed into an angle of 46-56 degrees, the middle adhesive layer is composed of chloroprene rubbers and natural synthetic rubbers, and the inner adhesive layer is made of butyl rubbers with excellent air tightness. The production process of the large high-pressure seamless rubber airbag comprises the following steps: (1) sequentially carrying out plastication, coordination, mixing and batching on raw rubbers; (2) carrying out impregnation and rubberizing on the high-strength tyre cords; (3) carrying out rotating preforming on the obtained object by using a roller; weaving open-end fibers, so that the joints of the fibers are arranged in a continuous shape, and sticking films on the fibers; (4) carrying out integral molding on the obtained object once; (5) carrying out integral vulcanization on the obtained object; and (6) carrying out reinforced heat vulcanization on edges and corners of the obtained product. The production process disclosed by the invention is simple and convenient in operation; the service time of the rubber airbag is more than 50 years, and the environmental sanitation index of the rubber airbag exceeds four orders of magnitude of the international standard requirement. The large high-pressure seamless rubber airbag and production process disclosed by the invention are used for the hoisting of pneumatic-shield gate dams and heavy objects.

Description

technical field [0001] The invention relates to a rubber product and its production process, in particular to a large-scale rubber product with continuous high-strength skeleton material and its production process, that is, a high-pressure seamless large-scale rubber airbag and its production process. Background technique [0002] High-strength rubber products are mostly reinforced by skeleton materials. And heat vulcanization by means of integral molding and pressure. However, large-scale rubber products, especially closed products, are difficult to be produced by thermal vulcanization with integral molding and overall pressure, because the process requires a large flat vulcanizer or vulcanization tank. A typical large-scale rubber product is a rubber dam. The preparation process is to first prepare a vulcanized rubber film, and then use a heat sealing machine to heat-press the vulcanized rubber film to form a rubber dam, that is, a rubber dam with seams. The process is ca...

AI Technical Summary

Problems solved by technology

This kind of product has low strength, such as: a 2-meter-high inflatable rubber dam, the operating pressure is 0.02MPa, which is far from meeting the lifting purposes of pneumatic shield gate dams and heavy objects. U.S. Patent (US5713699) discloses a A kind of "overflow shield gate system and its inflatable bag", the core technology is reinforced rubber dam bag (pressure resistance can reach 0.5MPa)

It successfully solves the shortcomings of the existing rubber dams. The main shortcomings of the rubber dam are: ①The service life is short for 15 years (not resistant to aging); and wooden sticks and other stabbing and sliding); ③Low pressure resistance (0.02MPa); ④Easy to paralyze the overall project; ⑤Construction and use are cumbersome

[0003] However, the "bottle diameter" of its large-scale application is complex manufacturing process, demanding production equipment and cost. For example, to make a 5×4m airbag requires a 5-meter-diameter vulcanization tank, and more importantly, in the vulcanization process Without the pressurization of the water cloth, the rubber layers of the dam body are prone to foaming and delamination, and the scrap rate is high

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