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Test method for rapid evaluation of resistance to cracking of sheaths of flame retardant optical cables

A test method and technology for optical cables, applied in the direction of strength characteristics, weather resistance/light resistance/corrosion resistance, and the use of repetitive force/pulse force to test the strength of materials, etc. Scientific and easy-to-use effects

Active Publication Date: 2019-02-12
HANGZHOU FUTONG COMM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the above problems, the present invention proposes a test method for quickly evaluating the anti-cracking performance of the flame-retardant optical cable sheath, which solves the defect of unreasonable design of the existing test method for quickly evaluating the anti-cracking performance of the flame-retardant optical cable sheath

Method used

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  • Test method for rapid evaluation of resistance to cracking of sheaths of flame retardant optical cables
  • Test method for rapid evaluation of resistance to cracking of sheaths of flame retardant optical cables
  • Test method for rapid evaluation of resistance to cracking of sheaths of flame retardant optical cables

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Embodiment 1

[0031] Embodiment one: a kind of test method of rapid evaluation flame-retardant optical cable sheath anti-cracking performance, comprises the following steps:

[0032]1) Pretreatment: Take a 25-meter-long flame-retardant optical cable to be tested and bend it into a loop, which is 25 times the outer diameter (mm) of the flame-retardant optical cable; put the looped flame-retardant optical cable into a 79°C environmental simulation box In the middle, keep the temperature for 24 hours, observe it every 8 hours, and check whether the appearance is cracked;

[0033] 2) Simulated construction test: Cool the pretreated flame retardant optical cable for at least 3 hours; install the pretreated flame retardant optical cable on the simulated construction test device, and the construction test device is used to drive the flame retardant optical cable at 5 times / per Rotate at a rotation rate of 1 minute; wind the flame-retardant optical cable in one direction and according to the set te...

Embodiment 2

[0036] Embodiment two: a kind of test method of rapid evaluation flame-retardant optical cable sheath anti-cracking performance, comprises the following steps:

[0037] 1) Pretreatment: Take a 30-meter-long flame-retardant optical cable to be tested and bend it into a loop, and the loop is not greater than 25 times the outer diameter (mm) of the flame-retardant optical cable; put the looped flame-retardant optical cable at 80±1°C In the environmental simulation box, keep the temperature constant for 24 hours, observe it every 8 hours, and check whether the appearance is cracked;

[0038] 2) Simulated construction test: cool the pretreated flame retardant optical cable for at least 3 hours; install the pretreated flame retardant optical cable on the simulated construction test device, and the construction test device is used to drive the flame retardant optical cable at 10 times / per Rotate at a rotation rate of 1 minute; wind the flame-retardant optical cable in one direction a...

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Abstract

The invention discloses a test method for rapidly evaluating the anti-cracking performance of the sheath of a flame-retardant optical cable, which includes the following steps: 1) pretreatment: the flame-retardant optical cable to be tested is bent into a loop, and the loop is not larger than the outer diameter of the flame-retardant optical cable 25 times of that; keep the coiled flame-retardant optical cable at constant temperature and check whether the appearance is cracked; 2) simulated construction test: cool the flame-retardant optical cable after pretreatment for at least 3 hours; place the flame-retardant optical cable in one direction according to the set Wind a certain number of turns under tension to form a cable coil, and then reversely rotate the same number of turns to release the sample from the curled state; check whether the appearance is cracked; 3) Environmental test: the flame-retardant optical cable to be tested is bent into a loop, and the loop is not It is 30 times larger than the outer diameter of the flame-retardant optical cable; place the looped flame-retardant optical cable at a constant temperature and check whether the appearance is cracked. The invention discloses a new test method for quickly evaluating the anti-cracking performance of the sheath of a flame-retardant optical cable.

Description

technical field [0001] The invention relates to the field of test methods for evaluating the performance of flame-retardant optical cables, in particular to a test method for rapidly evaluating the anti-cracking performance of the sheath of flame-retardant optical cables. Background technique [0002] The conventional flame-retardant fuel uses halogen-free flame-retardant polyolefin sheath material, which is an environmentally friendly product. Flame-retardant performance is an important topic and a difficulty in flame-retardant technology. The flame retardant system generally uses hydrated inorganic fillers as flame retardants. Although this type of flame retardant is non-toxic and low-smoke, its flame retardant efficiency is low. To meet the flame retardant requirements, its filling amount needs to be more than 50%. The physical and mechanical properties and processing properties of materials have a great impact. Because as the filling amount increases, the continuity bet...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/38G01N33/00
CPCG01N3/38G01N17/00G01N33/00G01N2033/0088G01N2203/0005G01N2203/0017G01N2203/0028G01N2203/0067G01N2203/028
Inventor 许增宾何建文王建军张楼彬
Owner HANGZHOU FUTONG COMM TECH CO LTD
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