Lining layer of bamboo-wound composite pipe and preparation method thereof

Abstract

The invention discloses a lining layer of a bamboo-wound composite pipe and a preparation method thereof. The lining layer comprises a natural fiber fabric layer and a reinforced fabric layer in sequence from inside to outside in the radial direction of the pipe; a natural fiber fabric of the natural fiber fabric layer and a reinforced fabric of the reinforced fabric layer are both dipped with adhesive; the adhesive dipping rate of the natural fiber fabric is higher than 92%; the adhesive dipping rate of the reinforced fabric is higher than 71%; and the adhesive includes a resin and a curing agent. The method comprises the following steps: firstly, a demolding layer is prepared; one layer of adhesive is poured on the surface of the demolding layer, then, the natural fiber fabric is wound, and the adhesive infiltrates the natural fiber fabric to obtain the natural fiber fabric layer; one layer of adhesive is poured on the surface of the natural fiber fabric layer, the reinforced fabric is wound, the adhesive infiltrates the reinforced fabric to obtain the reinforced fabric layer; and then, the needed lining layer is obtained through curing treatment. The lining layer is excellent in leakage resistance and corrosion resistance, and satisfies the sanitation requirement; and the preparation method is simple in operation and high in efficiency.

Description

technical field [0001] The invention belongs to the field of preparation of inner liners of pressure pipes, and more specifically relates to an inner liner of a bamboo winding composite pipe and a preparation method thereof. Background technique [0002] At present, in the fields of urban water supply and drainage, water conservancy, farmland irrigation, petroleum sewage treatment, industrial circulating water and other fields, the pipes used are generally steel pipes, ductile iron pipes, polyethylene pipes, polyvinyl chloride pipes, cement pipes, steel-lined cement pipes, and glass fiber reinforced plastics. Pipe, FRP sand pipe, etc. Among them, the production process of raw materials for steel pipes and ductile iron pipes will discharge a large amount of waste gas, waste water, and waste residues, causing serious environmental pollution, and the weight of the pipe body is large, the transportation cost is high, and construction is difficult; the raw materials of polyethyle...

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Problems solved by technology

[0004] However, the specific structure and preparation method of the inner liner of the bamboo winding composite pipe are not mentioned in the prior art disclosed above, and the inner lining is particularly important as the inner layer of the bamboo winding composite pipe in direct contact with the conveying medium. Need to ensure anti-leakage, anti-corrosion, and need to meet hygienic requirements

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