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What is the basic structure of the five parts of the fire hose?

Update:19-03-2021
Summary:

The common fire hose is a circular or flat tubular body […]

The common fire hose is a circular or flat tubular body made of a cylindrical fabric layer woven by lining and warp and weft threads, combined by adhesive or vulcanization. It has a prescribed length and is flexible and can be coiled.
Different occasions require different fire hoses, but their basic structure includes five parts: lining, fabric layer, covering layer, coating and adhesive layer.
The lining is a waterproof layer attached to the inner wall of the fire hose. It is not only smooth but also has a specified strength, enough to ensure the smooth delivery of water or other fire extinguishing materials. The lining is generally made of polymer materials such as rubber, TPU, and PVC.
The fabric layer is the skeleton molding material of the entire hose, generally made of nylon, cotton, polyester and other fiber materials, with excellent wear resistance and high pressure resistance.
Covering layer and coating are polymer materials covering the outer layer of fire hose, mainly using acrylic paint, polyurethane paint, elastomer, rubber and other materials. They are waterproof, heat-resistant, corrosion-resistant, wear-resistant, aging-resistant, and flame-retardant, and can effectively protect the lining and fabric layer.
The adhesive layer is a polymer material that binds the lining, fabric layer, and covering layer together, which can firmly combine the three to form a whole. Generally, solvent-based PU glue, rubber-based solid adhesive, polyolefin hot-melt adhesive and PU solid hot-melt adhesive are used as the adhesive layer.

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