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Coated optical fibers

一种光纤、涂覆的技术，应用在光导、玻璃光纤、包层光纤等方向，能够解决异常温度、高应力等问题

Inactive Publication Date: 2006-10-04
DSM IP ASSETS BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, these coatings still need to be further improved in terms of strength or integrity, because some disadvantages still occur during the use of coated optical fibers, especially in the course of time (during production, cabling or when they are buried underground). Will be subjected to extremely high stress and abnormal temperature, in which case the coated fiber will still show some defects

Method used

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  • Coated optical fibers
  • Coated optical fibers
  • Coated optical fibers

Examples

Experimental program
Comparison scheme
Effect test

comparative test A

[0304] To prepare the coating, use 50% by weight of polyether urethane acrylate (theoretical molecular weight is about 9000), about 20% by weight of 8 ethoxylated nonanol acrylate, 20% by weight of lauryl acrylate, and 6% by weight. Weight of N-vinylcaprolactam, 1.5% by weight of Lucirine TPO, 0.8% by weight of Irganox 1035, 0.1% by weight of diethanolamine, and 0.3% of Seesorb102.

[0305] The measurement results are as follows: The equilibrium modulus is 0.4MPa, E’ 23 0.5MPa, strain hardening is very small, Go=26J / m 2 . Use 1J / cm 2 The amount of radiation is cured. In the relative Mooney graph of FIG. 4, the coating is represented by the curve of Comparative Example A. The hole intensity of the tenth hole σ 10 It is 0.96MPa (see Figure 3).

[0306] Compare test B and example 1

[0307] A general-purpose coating with a balanced modulus of 1.0 MPa is used. In comparative test B, the sample uses 1J / cm 2 The amount of radiation is cured. The hole strength measured when the holes app...

comparative test C

[0318] To prepare the coating, use 60% by weight of polyether urethane acrylate (theoretical molecular weight is about 4000), 18.6% by weight of 4 ethoxylated nonanol acrylates, and 4% by weight of 1-2-hydroxypropyl Phenoxy acrylate, 7% by weight of lauryl acrylate, 7.8% by weight of N-vinylcaprolactam, 1.2% by weight of Lucirine TPO, 0.3% by weight of Irganox 1035, and 1% by weight of diethanolamine.

[0319] The test results are as follows: the equilibrium modulus is 1.2 MPa. Calculated volume thermal expansion coefficient α 23 Is 7.15×10 -4 K -1 .

[0320] The comparison between the primary coating of Example 3 and the coating of Comparative Test C shows that, compared with the stress level of the primary coating of Comparative Test C, the coating of Example 3 (its α 23 Within the scope of the claims) the actual stress level is reduced. In the primary coating, the gain in stress reduction depends on the volumetric thermal expansion coefficient of the secondary coating. Generall...

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Abstract

The invention relates to coated optical fibers comprising soft primary coatings and to such primary coatings for protecting glass optical fibers having a sufficient high resistance against cavitation. In particular, the primary coatings have a cavitation strength at which a tenth cavitation appears ( sigma <10>cav) of at least about 1.0 MPa as measured at a deformation rate of 0.20% min<-1> and of at least about 1.4 times their dynamic modulus at 23 DEG C. The coating preferably shows strain hardening in a relative Mooney plot, preferably has a strain energy release rate Go of about 20 J / m<2> or more, and preferably has a low volumetric thermal expansion coefficient. The invention furthermore provides a method and apparatus for measuring the cavitation strength of a primary coating.

Description

[0001] This application is a divisional application of Chinese invention patent application No. 01807036.1 (PCT / NL01 / 00850) filed on November 21, 2001, entitled "Coated Optical Fiber". Technical field [0002] The present invention relates to a coated optical fiber comprising a primary coating and a secondary coating, a radiation-curable primary coating composition, a combination of primary and secondary coatings, and an optical fiber containing at least one of the above-mentioned coated optical fibers Optical fiber ribbon and method and equipment for measuring the strength of the coating cavity of the primary coating on the optical fiber. Background technique [0003] Because the optical fiber is brittle and easy to break, the optical fiber is usually coated with a coating material of radiation curable resin composition. It is known that the transmission characteristics of the optical fiber are significantly affected by some characteristics such as the modulus of the primary coat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/00C03C25/48C03C25/24G02B6/44C01B32/50C03C25/10C03C25/106C03C25/32C03C25/50C08F220/26C08F220/36C08F230/02C08G18/28C08G18/67C08G18/80C08G18/81C09D4/00C09D4/02C09D5/00C09D175/16C09D201/00G01L1/00
CPCC08G18/8175C09D4/00G02B6/02395C08F230/02C08G18/284C08G18/8064C09D175/16C03C25/106C08F220/26C08F220/36C08G18/285C08G18/672G02B6/4403C08F222/1065C08G18/48C08F220/301C08F222/102C03C25/50
Inventor M·J·H·布尔特斯G·雷克尔斯P·W·P·V·布莱曼J·M·H·林森A·A·M·斯特雷克斯J·A·范埃克伦A·G·M·阿贝尔M·多尔舒P·A·M·斯特曼
Owner DSM IP ASSETS BV
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