Double layer co-extrusion method for extremely micro air-blowing optical cable, and the extremely micro air-blowing optical cable

A double-layer co-extrusion and air-blowing technology, which is applied in the field of optical cable manufacturing, can solve the problems of pressure resistance performance limiting the wall thickness of the loose tube, the size of the structure cannot be well satisfied, and the size of the loose tube diameter is limited. Achieve the effect of reducing production and post-maintenance costs, solving the shortage of pipeline resources, and improving environmental resistance

Inactive Publication Date: 2016-01-27
JIANGSU HENGTONG PHOTOELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the continuous development of optical networks, the shortage of pipeline resources has become increasingly prominent. The application of air-blown optical cables has successfully solved the problem of shortage of pipeline resources. The traditional air-blown optical cable is difficult to meet the needs of current applications
With the development of air-blown micro-cable technology, high fiber density, small cable diameter, and light weight will inevitably become the trend of air-blown micro-cable technology. The structural size of traditional air-blown micro-cable products can no longer meet the current laying requirements. De

Method used

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  • Double layer co-extrusion method for extremely micro air-blowing optical cable, and the extremely micro air-blowing optical cable
  • Double layer co-extrusion method for extremely micro air-blowing optical cable, and the extremely micro air-blowing optical cable

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Experimental program
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Example Embodiment

[0031] Example 1

[0032] Such as figure 1 As shown, this embodiment discloses a double-layer co-extrusion method for extremely miniature air blown optical cables. Compared with the conventional secondary coating production process, this method adopts a new loose tube material and a double-layer co-extrusion extrusion process.

[0033] Specifically include the following processes:

[0034] Optical fiber storage: Screen the optical fiber storage and select the optical fiber with qualified transmission performance and tension.

[0035] Optical fiber coloring: select the standard full color spectrum to mark the optical fiber, the marked fiber will not fade under high temperature, and it is easy to identify when connecting.

[0036] Secondary coating: The secondary coating adopts a double-layer co-extrusion process to make a loose tube; the PC material and PBT material are dried and extruded through different extruder units, and pass through different split cones in the die And runner desi...

Example Embodiment

[0043] Example 2

[0044] In Example 2, using the process disclosed in Example 1, a very miniature air-blown optical fiber cable was prepared. The structure of the optical cable is as figure 2 As shown in the figure, it includes: a central reinforcement 1 arranged in the center, the outer circumference of the central reinforcement 1 is covered with a number of loose tubes 2, and the above loose tubes 1 include: PBT outer layer 21, PC inner layer 22 and quilt A plurality of optical fibers 24 are covered by the PC inner layer 22, and a loose tube inner water blocking material 23 is filled between the PC inner layer 22 and the optical fibers 24, and the outer jacket 3 is covered on the exterior of the plurality of loose tubes 2.

[0045] The gap between the loose tube 2 and the outer sheath 3 is filled with cable paste 6, and the loose tube 2 and a number of water blocking yarns 4 are twisted together by SZ twisting. A tear cord 5 is provided on the inner side, and the tear cord 5 i...

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Abstract

The invention relates to a double layer co-extrusion method for an extremely micro air-blowing optical cable. The method comprises optical fiber storage, optical fiber coloring, secondary coating, SZ intertwist, an oversheath process and a secondary coating process, wherein PC materials and PBT materials are respectively dried and extruded through different extruding machine units; through different distribution cones and channels in the unit heads, the PC materials are extruded from the inner layer of each loose tube; and the PBT materials are extruded from the outer layer of each loose tube. The double layer co-extrusion method utilizes the PC material and PBT material double layer co-extrusion technology to prepare an extremely micro air-blowing optical cable, and can enable the loose tubes of the optical cable to have the advantages of the two types of materials. By means of accurate control of the technical parameters, the double layer co-extrusion method can realize limit control of the geometric dimension of the optical cable and reduce the external diameter of the optical cable to the minimum theoretically, and has the advantages of being high in intensity of the optical cable, being small in the cable diameter and being light in mass, and is the best choice for air-blowing laying.

Description

technical field [0001] The invention belongs to the technical field of optical cable manufacturing, in particular to an air-blown optical cable, and in particular to a double-layer co-extrusion process method for an ultra-miniature air-blown optical cable and an ultra-miniature air-blown optical cable prepared by the method. Background technique [0002] With the continuous development of optical networks, the shortage of pipeline resources has become increasingly prominent. The application of air-blown optical cables has successfully solved the problem of shortage of pipeline resources. The traditional air-blown optical cable is difficult to meet the needs of current applications. With the development of air-blown micro-cable technology, high fiber density, small cable diameter, and light weight will inevitably become the trend of air-blown micro-cable technology. The structural size of traditional air-blown micro-cable products can no longer meet the current laying require...

Claims

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Application Information

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IPC IPC(8): G02B6/44
CPCG02B6/443G02B6/4434G02B6/4486G02B6/44384G02B6/44
Inventor 吴迪刘沛东张增强吴俊雄吴雪华李强稽德海吴金华张小山王中凯王少安
Owner JIANGSU HENGTONG PHOTOELECTRIC
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