High-expansion-rate water-blocking yarn and production process thereof

Abstract

The present invention discloses a high-expansion-rate water-blocking yarn and a production process thereof. The water-blocking yarn comprises fiber, an adhesive layer formed on the surface of the fiber and a super absorbent resin layer on the surface of the adhesive layer, wherein the super absorbent resin layer is formed by drying a mixed solution of a post-crosslinked water absorption resin solution, polyethylene glycol and deionized water on the adhesive layer. The production process comprises the following steps of A, impregnating the fiber in an adhesive solution; B, drying the fiber through a hot channel, so as to enable the adhesive solution to form the adhesive layer on the fiber surface; C, impregnating the dried fiber in a water-soluble resin glue solution; D, drying the fiber through the hot channel, so as to enable the water-soluble resin to be crosslinked into super absorbent resin and further to form the super absorbent resin layer on the adhesive layer; and E, winding the dried fiber to obtain the high-expansion-rate water-blocking yarn. According to the water-blocking yarn prepared with the process, the water absorption resin is firmly combined with the fiber, the texture is soft, the water absorption rate is high, and water and moisture can be effectively prevented from invading a power cable and an optical cable, so that safe operation of the power cable and the optical cable is ensured.

Description

technical field [0001] The invention relates to the field of water-blocking materials for cables and optical cables, in particular to a high-expansion water-blocking yarn and a production process thereof. Background technique [0002] During the laying and running of electric and optical cables, when the cable is damaged, moisture and moisture will enter the interior of the cable from the damaged point and spread along the longitudinal gap of the cable, resulting in hydrogen loss, fiber breakage and a sharp drop in electrical insulation performance. The drop causes the interruption of communication cable and optical cable signal transmission. At present, the filling and water-blocking materials for optical cables mainly include ointment, water-blocking tape, water-blocking yarn, and hot-melt adhesive to achieve the purpose of moisture-proof and water-blocking. In the production process of optical cables, the water-blocking yarn is wrapped around the cable core. When the opt...

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to solve the problems in the prior art of water-blocking yarn with high glue content, low expansion rate and few water-blocking yarn products made of aramid fiber, and provides a production process for water-blocking yarn with high expansion rate. The production process introduces the first adhesive layer on the surface of the fiber, and adopts a specific glue composition and specific process control to obtain a water-blocking yarn with a moderate amount of glue, a firm combination of water-absorbent resin, and a high water absorption rate, and further enriches the market. Types of water blocking yarn

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