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Water-blocking yarn, preparation method of water-blocking yarn and application of water-blocking yarn in optical cable and fiber sleeve

A yarn and water-blocking technology, which is applied in the field of water-blocking yarn and its preparation, can solve problems such as slow water absorption rate, high attenuation rate of optical fiber and cable transmission signals, and unsatisfactory water-blocking effect

Active Publication Date: 2021-12-10
岳阳澳源通信材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current water-blocking yarn has a slow water absorption rate, low swelling height, and unsatisfactory water-blocking effect. The attenuation rate of the transmission signal of the optical fiber cable is high during long-term use.

Method used

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  • Water-blocking yarn, preparation method of water-blocking yarn and application of water-blocking yarn in optical cable and fiber sleeve
  • Water-blocking yarn, preparation method of water-blocking yarn and application of water-blocking yarn in optical cable and fiber sleeve

Examples

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preparation example Construction

[0035] The present invention also provides a method for preparing the water-blocking yarn described in the above scheme, comprising the following steps:

[0036] mixing water, acrylic acid, sodium hydroxide, magnesium salt, calcium salt, foaming agent, dispersant, cross-linking agent and initiator to obtain a synthetic liquid for the water-absorbing swelling layer;

[0037] The polyester filaments are first immersed in the water-absorbing swellable layer synthesis liquid and then heated and polymerized to form a water-absorbing swellable layer on the surface of the polyester long fibers to obtain polyester long fibers coated with a water-absorbent swellable layer;

[0038] The acrylic water-based latex is mixed with water to obtain a water-based glue, and the polyester filament coated with a water-absorbing swelling layer is immersed in the water-based glue for a second time and then dried to obtain the water-blocking yarn.

[0039] In the present invention, water, acrylic aci...

Embodiment 1

[0048] Take 200 parts of deionized water, 100 parts of acrylic acid, 75 parts of sodium hydroxide, 30 parts of magnesium chloride, 21 parts of calcium chloride, 3 parts of sodium bicarbonate, 10 parts of fumed silica, crosslinking agent (polyethylene glycol diacrylic acid ester) 4 parts, initiator (sodium persulfate) 5 parts, the above components are mixed to obtain a water-absorbing swelling layer synthetic liquid;

[0049] The polyester long fibers are immersed in the water-absorbing swelling layer synthetic solution for 2 seconds, the mass ratio of the polyester long fibers and the water-absorbing swelling layer synthetic liquid hanging on the polyester long fibers is 10:2, and then placed in a methanol hot blast stove Heating to polymerize the synthetic solution on the polyester filaments, the temperature of the heating polymerization is 220°C, and the time is 1min, to obtain polyester filaments coated with a water-absorbing swelling layer;

[0050] Mix acrylic water-based...

Embodiment 2

[0052] Other conditions are the same as in Example 1, except that the composition of the water-absorbing swelling layer synthesis liquid is changed to: 150 parts of deionized water, 70 parts of acrylic acid, 60 parts of sodium hydroxide, 5 parts of magnesium acetate, 10 parts of calcium acetate, and 5 parts of sodium bicarbonate Parts, 5 parts of fumed silica, 2 parts of crosslinking agent (N,N-methylene acrylamide), 2 parts of initiator (potassium persulfate).

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Abstract

The invention relates to the technical field of optical cables, and provides a water-blocking yarn, a preparation method of the water-blocking yarn and application of the water-blocking yarn in an optical cable and fiber sleeve. Acrylic acid, sodium hydroxide, calcium salt, magnesium salt and the like are utilized to form a water-absorbing expansion layer, the water-absorbing expansion layer is mainly of a cross-linked network structure formed by water-absorbing resin, sodium magnesium and calcium ions exist in the water-absorbing resin network structure, and osmotic pressure is formed by utilizing the ion concentration difference existing between inside and outside liquid of the water-absorbing resin cross-linked network structure, so that the initial water absorption rate is accelerated, and the expansion height is increased. The material of the water-blocking yarn provided by the invention does not contain grease and hydrogen ions, and is placed in the optical cable and fiber sleeve for water blocking, so that optical fiber can be protected from being influenced by a water peak value, the structural excess length of the optical fiber in the sleeve is ensured not to be influenced by laying and bending, signals transmitted by optical fiber and cable are not attenuated for a long time, and the signal transmission quality is excellent; and the optical cable structure is grease-free, good in environmental protection property and light in weight.

Description

technical field [0001] The invention relates to the technical field of optical cables, in particular to a water-blocking yarn, a preparation method thereof and an application in an optical fiber sleeve of an optical cable. Background technique [0002] A fiber optic cable is a communication cable consisting of two or more glass or plastic optical fiber cores within a protective cladding covered by a plastic PVC outer sleeve for signal transmission along the inner optical fiber. With the rapid development of global information technology, optical fiber cables as information transmission carriers are also developing in the direction of large capacity and high transmission. The use of optical fibers is transforming from single-film optical fibers to multi-film optical fibers. At the same time, the materials for protecting optical fibers also need to be synchronized with the new structure. iterate. [0003] As we all know, water is the most taboo for optical fibers. The reason ...

Claims

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Application Information

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IPC IPC(8): D06M15/263G02B6/44D06M101/32
CPCD06M15/263G02B6/4459D06M2101/32G02B6/44384
Inventor 罗雄
Owner 岳阳澳源通信材料有限公司
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