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A kind of PBT material and preparation method for optical cable

A technology for optical cables and raw materials, applied in the field of PBT materials and preparations for optical cables, can solve the problems of large shrinkage in the later stage, poor pressure resistance of loose tubes, and insufficient crystallization, etc., to reduce raw material costs, speed up turnover, and increase production speed Effect

Inactive Publication Date: 2015-11-04
STATE GRID SHANDONG ELECTRIC POWER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]In China, the mechanical and physical properties of PBT need to meet the industry standard of the Ministry of Posts and Telecommunications "YD1118.1-2001 Secondary coating materials for optical fibers Part I: Polyterephthalic acid Butylene Glycol Ester", the existing manufacturers of PBT materials for optical cables on the market mainly include: German HOLZ Company, German BASF Company, Jiangyin Aikesen Company, Suzhou Yingmao Company, Shanghai Dehong Company, Yangzhou Hongsen Company etc.; although in the production process of the loose tube, there are hot and cold water tanks for cooling, even if the length of the water tank is extended infinitely, the fastest production speed that PBT in the prior art can achieve is only 250m / min; this greatly restricts Improve the production capacity of optical cable manufacturers
On the other hand, in high-speed production, although the loose tube has been sufficiently cooled, the late shrinkage after production is still quite large. The main reason is that the crystallization is not sufficient
On the other hand, the lateral pressure resistance of the loose tube produced by the existing PBT is not ideal, especially after the large-diameter loose tube is produced, the pressure resistance of the loose tube is quite poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A PBT material for an optical cable, characterized in that it contains the following raw materials in parts by weight: 35 parts of polybutylene terephthalate, 20 parts of polypropylene, 6 parts of polyethylene, 2 parts of aluminum hydroxide, triphosphate 4 parts of phenyl ester, 3 parts of talcum powder, 1 part of mica powder, 3 parts of maleic anhydride, 2 parts of decabromodiphenylethane, 2 parts of white oil, 1 part of zinc oxide, 2 parts of titanium dioxide, polyethylene wax 2 parts; the above-mentioned PBT material for optical cable is characterized in that it is prepared by the following method: the first step: take each raw material by weight and place it separately; the second step: weigh the first step Put polybutylene terephthalate, polypropylene, polyethylene, triphenyl phosphate, maleic anhydride, decabromodiphenylethane, white oil, and polyethylene wax into a stainless steel reaction pot, and vacuum Temperature is -0.15MPa~-0.05MPa, reaction temperature is ...

Embodiment 2

[0030] A PBT material for an optical cable, characterized in that it contains the following raw materials in parts by weight: 45 parts of polybutylene terephthalate, 25 parts of polypropylene, 15 parts of polyethylene, 3 parts of aluminum hydroxide, triphosphate 5 parts of phenyl ester, 4 parts of talcum powder, 2 parts of mica powder, 6 parts of maleic anhydride, 4 parts of decabromodiphenylethane, 3 parts of white oil, 2 parts of zinc oxide, 3 parts of titanium dioxide, polyethylene wax 4 parts; The preparation method of this implementation example is the same as the preparation method in Implementation Example 1.

Embodiment 3

[0032] A PBT material for an optical cable, characterized in that it contains the following raw materials in parts by weight: 50 parts of polybutylene terephthalate, 30 parts of polypropylene, 20 parts of polyethylene, 4 parts of aluminum hydroxide, triphosphate 6 parts of phenyl ester, 5 parts of talcum powder, 3 parts of mica powder, 9 parts of maleic anhydride, 6 parts of decabromodiphenylethane, 4 parts of white oil, 3 parts of zinc oxide, 4 parts of titanium dioxide, polyethylene wax 6 parts; The preparation method of this implementation example is the same as the preparation method in Implementation Example 1.

[0033] Through repeated tests by the applicant, it is found that as long as the PBT materials meet the following raw materials and proportioning ratios, the purpose of the present invention can be achieved.

[0034] A PBT material for an optical cable, characterized in that it contains the following raw materials in parts by weight: 35-50 parts of polybutylene te...

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Abstract

The invention belongs to the technical field of optical cable materials, and particularly relates to a PBT (polybutylene terephthalate) material for optical cables. The PBT material is characterized by comprising following raw materials in parts by weight: 35-50 parts of PBT, 20-30 parts of polypropylene, 6-20 parts of polyethylene, 2-4 parts of aluminum hydroxide, 4-6 parts of triphenyl phosphate, 3-5 parts of talcum powder, 1-3 parts of mica powder, 3-9 parts of maleic anhydride, 2-6 parts of decabromodiphenylethane, 2-4 parts of white oil, 1-3 parts of zinc oxide, 2-4 parts of titanium dioxide and 2-6 parts of polyethylene wax. The invention also discloses a preparation method of the PBT material. The PBT material has the main beneficial effects of low density, small thermal contraction, high melt index, high lateral pressure resistance, and strong resistance to high and low temperatures; and the preparation method is simple and easy to control.

Description

technical field [0001] The invention belongs to the technical field of optical cable materials, and in particular relates to a PBT material for optical cables and a preparation method. Background technique [0002] PBT is mainly used in the extrusion of loose tubes in optical cables. The PBT material is heated, spirally sheared, compressed, and melted in the extruder, and then stretched and cooled to form a loose tube. At the same time, it is placed in the loose tube Optical fiber or optical fiber tape, if necessary, fill the gap in the tube with water-blocking ointment, water-blocking powder, water-blocking yarn and other water-blocking materials. [0003] In China, the mechanical and physical properties of PBT need to meet the requirements of the Ministry of Posts and Telecommunications industry standard "YD1118.1-2001 Secondary Coating Materials for Optical Fiber Part One: Polybutylene Terephthalate". Manufacturers of PBT materials mainly include: German HOLZ Company, Ge...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/02C08L23/12C08L23/06C08K13/02C08K3/22C08K5/523C08K3/34C08K5/1539C08K5/03C08K5/01B29C47/92H01B3/42H01B3/44B29C48/92
CPCB29C47/92B29B9/08B29B9/12B29B9/14B29C47/0026B29C2947/9259B29C2947/92704C08L67/02B29C48/10B29C48/92B29C2948/9259B29C2948/92704C08K3/013C08K5/521C08L23/06C08L23/12
Inventor 张高峰刘国娜解晓敏张志伟徐珂王天俣张敏韩根生桑晶晶陈涛
Owner STATE GRID SHANDONG ELECTRIC POWER
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