Composite material for repairing non-excavated pipeline and preparation method thereof
A composite material and pipeline repair technology, applied in the directions of reagents, educts, products, etc., can solve the problems of unstable repair effect, high pipeline repair cost, and troublesome construction unit selection of pipeline repair materials, so as to achieve low cost and improve mechanical performance. , the effect of short process flow
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[0014] The preferred process settings are as follows:
[0036] The preparation method of a composite material for trenchless pipeline repair of the present invention has the following process flow: polyester needle punched non-woven fabric → hot press forming process → VARI forming process → composite material for pipeline repair.
[0037] 1. Hot pressing process:
[0038] Put the polyester needle-punched nonwoven fabric and TPU into the mold according to a certain ratio, and perform hot pressing under certain conditions to obtain a reinforced fabric. The hot pressing process diagram is as follows figure 1 Shown.
[0039] 1.1. Raw material selection:
[0040] The present invention adopts 1 layer of polyester needle punched nonwoven fabric and 2 layers of thermoplastic spandex elastomer (TPU) for hot-pressing compounding, in which:
[0041] Polyester needle-punched nonwoven fabric: 448g / m2 per square meter 2 , The thickness is 3.30mm, the breaking stress in the warp and weft directions ar...
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