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Polyethylene resin composition for optical fibre cable isolator and optical fiber isolator with spiral duct

A technology of polyethylene resin and optical fiber, which is applied in the direction of light guide, fiber mechanical structure, optics, etc., and can solve the problems of asphalt and asphalt sticking to spacers, etc.

Inactive Publication Date: 2004-09-22
RESONAC HOLDINGS CORPORATION +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] From the perspective of drawing speed, although high-MI polyethylene provides good moldability, further improvement of basic physical properties, especially dimensional stability, is still required, because these properties of high-MI polyethylene are worse than those of low-MI polyethylene
Also, the use of high MI polyethylene can result in pitch at the die opening, requiring frequent die cleaning
Furthermore, bitumen can stick to the spacer and become a problem

Method used

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  • Polyethylene resin composition for optical fibre cable isolator and optical fiber isolator with spiral duct
  • Polyethylene resin composition for optical fibre cable isolator and optical fiber isolator with spiral duct
  • Polyethylene resin composition for optical fibre cable isolator and optical fiber isolator with spiral duct

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] Figure 1A It is a sectional view of an optical fiber cable produced using the polyethylene resin composition of the present invention.

[0066] The MI is 0.05g / 10min, the density is 0.948g / cm 3 A polyethylene resin having a flow ratio (HLMI / MLMI) of 40 is molded and extruded around a tie rod 1 made of a steel wire with a diameter of 2.6 mmΦ. A spacer 10 with an outer diameter of 8.5 mmΦ and five helical grooves with a width of 1.5 mm, a depth of 2.3 mm and a pitch of 500 mm was obtained. The drawing speed and length of the spacers were 15 m / min and 1000 m, respectively.

[0067] Next, the ribbons 3 each containing four optical fibers were loaded into the grooves, and the residual elongation was set at about 0.04% to obtain a cable containing 100 optical fibers.

[0068] Figure 1B It shows a cross-sectional view of a ribbon 3 containing four optical fibers. The ribbon 3 is surrounded by a single-mode (sigle-mode) optical fiber 5 with a diameter of 250 μmΦ, a mode f...

Embodiment 2

[0071] In addition to using an MI of 0.05g / 10min and a density of 0.948g / cm 3 And flow ratio (HLMI / MLMI) is except the polyethylene resin of 53, repeat embodiment 1. The results obtained are listed in Table 1.

Embodiment 3

[0087] In addition to using a polyethylene composition, the composition contains 99.97% by weight MI of 0.05g / 10min and a density of 0.948g / cm 3 And a polyethylene resin with a flow ratio (HLMI / MLMI) of 40 and 0.03% by weight of a fluorinated elastomer, that is, a copolymer of vinylidene difluoride and hexafluoropropylene (hereinafter referred to as "2 / 6 fluoride"), Example 1 was repeated. The results are listed in Table 2. Also, when the composition was molded and extruded at a drawing speed of 15 m / min for 2 hours, pitch generated at the die was observed. The results obtained are listed in Table 2.

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Abstract

A polyethylene resin composition for spacer for optical fiber cable provided with a plurality of channels spirally formed on the periphery surface thereof for receiving the optical fiber comprising polyethylene resin having a melt index of more than or equal to 0.01 g / 10 min to less than 0.30 g / 10 min, a density of 0.941 to 0.955 g / cm3 and a flow ratio (HLMI / MLMI) in accordance with JIS K7210 of 20 to 55, and optionally fluorine elastomer.

Description

[0001] This application is a divisional application with the application number "95116774.X" filed on October 13, 1995, and the title of the invention is "optical fiber cable separator and polyethylene resin composition used therefor". technical field [0002] The present invention relates to an optical fiber cable separator and a polyethylene resin composition therefor. In particular, the present invention relates to a polyethylene resin composition with specified melt index, density and flow ratio, good physical properties, moldability and dimensional stability, and a polyethylene resin composition made using the polyethylene resin composition, which has a low Fiber optic cable spacers with average surface roughness and low fiber transmission loss. Background technique [0003] figure 2 A conventional fiber optic cable polyethylene spacer (hereinafter referred to as "spacer") having a helical groove is exemplified. [0004] figure 2 Among them, the spacer 20 has a centr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/04C08L27/00G02B6/44
CPCG02B6/4489C08L23/06C08L27/12
Inventor 笹井国広小谷辉充中村昭柴野博田中孝齐藤孝司佐谷宏
Owner RESONAC HOLDINGS CORPORATION