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Production method of polypropylene crystal form design toughened modified optical cable loose tube

A technology of toughening modification and production method, applied in the field of material modification and optical cable production, can solve the problems of poor impact performance, heat resistance can not meet processing requirements, poor toughness of PP sleeve, etc., to achieve high heat resistance , The effect of preventing casing tie marks, good impact resistance and casing bending resistance

Inactive Publication Date: 2019-09-03
JINLING INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, some optical cable manufacturers have begun to use PP as the raw material for loose tubes, but the toughness of PP tubes is also poor, and the heat resistance often does not meet the processing requirements of subsequent processes. The main reason is that PP is a A semi-crystalline polymer, α, β, and γ are the most common crystal forms, of which α-PP is the most stable, but it is brittle and has poor impact properties

Method used

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  • Production method of polypropylene crystal form design toughened modified optical cable loose tube
  • Production method of polypropylene crystal form design toughened modified optical cable loose tube
  • Production method of polypropylene crystal form design toughened modified optical cable loose tube

Examples

Experimental program
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Effect test

Embodiment 1

[0026] The special modified PP for secondary coating (produced by Jiangyin Aikesen, brand GPP3030), color masterbatch (produced by Yangzhou Jinsen, blue color masterbatch, brand 703, the addition amount is 2wt%) is melted and produced by a single-screw extruder 2.3 / 1.6-12B1 specification loose tube, the temperature of the four zones of the extruder body is 190°C, 200°C, 210°C, 220°C, and the temperature of the three zones of the head is 220°C, 225°C, 230°C . After drawing the tube and threading the fiber, the high-speed production speed is 200m / min and it enters the cooling water tank, the length of the water tank is 4m, the water temperature is 35°C, and then it enters the heat treatment water bath pulley, winding 5 times, the water temperature is 80°C, and enters the water bath pulley cooling after heat treatment , Winding 5 full circles, the cooling temperature is 35°C, and then enters the air-cooled drying equipment, the cooling temperature is 20°C, and then enters the wi...

Embodiment 2

[0028] Modified PP for secondary plastic coating (produced by Jiangyin Aikesen, brand GPP3030), color masterbatch (produced by Yangzhou Jinsen, blue color masterbatch, brand 703), β-nucleating masterbatch (Nanjing Chengkuan Trading Co., Ltd., brand : MNT-C, addition amount 1wt%), the main body of the β-nucleating masterbatch is a mixture of 30wt% carboxylate nucleating agent and PP, and the three are melted through a single-screw extruder to produce 2.3 / 1.6-12B1 specification pine As for the casing, the temperature of the body of the extruder is 190°C, 200°C, 210°C, and 220°C, and the temperature of the head is 220°C, 225°C, and 230°C. After drawing the tube and threading the fiber, the high-speed production speed is 200m / min and it enters the cooling water tank. The length of the water tank is 4m, and the water temperature is 35°C. Then it enters the heat treatment water bath wheel puller, wraps 5 times, and the water temperature is 80°C. After heat treatment, it enters the wa...

Embodiment 3

[0030] Modified PP for secondary plastic coating (produced by Jiangyin Aikesen, brand GPP3030), color masterbatch (produced by Yangzhou Jinsen, blue color masterbatch, brand 703), β-nucleating masterbatch (Nanjing Chengkuan Trading Co., Ltd., brand : MNT-C, addition amount 1wt%), the main body of the β-nucleating masterbatch is a mixture of 30wt% carboxylate nucleating agent and PP, and the three are melted through a single-screw extruder to produce 2.3 / 1.6-12B1 specification pine As for the casing, the temperature of the body of the extruder is 190°C, 200°C, 210°C, and 220°C, and the temperature of the head is 220°C, 225°C, and 230°C. After drawing the tube and threading the fiber, the high-speed production speed is 200m / min and enters the cooling water tank, the length of the water tank is 4m, the water temperature is 35°C, and then enters the heat treatment water bath pulley, winding 5 times, the water temperature is 90°C, and enters the water bath pulley after heat treatmen...

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Abstract

The invention relates to a production method of a polypropylene crystal form design toughened modified optical cable loose tube. The method comprises the following steps that automatic feeding machines are additionally arranged at the PP feeding position of beta crystal form polypropylene optical cable loose tube extrusion forming production equipment, the feeding machines comprises a color masterbatch feeding machine and a beta nucleating master batch feeding machine, and the adding amount is adjusted by adjusting the screw speed of the automatic feeding machines; added color master batch, beta nucleating master batch and PP are extruded through a phi 50 single-screw extruder and discharged from the head of the extruder to be sleeve pipes; and after being discharging from the head of theextruder, the sleeve pipes quickly enter a water tank to be rapidly cooled, and then enter a first water bath to be subjected to wheel dragging for heat treatment, after being subjected to heat treatment, the sleeve pipes enter a second water bath wheel to be subjected to wheel dragging, and after being cooled again by air-blowing cooling, the sleeve pipes enter a wire winding machine. The methodis simple to operate, easy to master and control and convenient to popularize and apply.

Description

technical field [0001] The invention relates to the technical field of material modification and optical cable production, in particular to a production method of a polypropylene crystal form design toughened modified optical cable loose tube. Background technique [0002] In the field of optical communication, loose tube is the core component of stranded and central bundle tube optical cables, and its main function is to protect the optical fiber from internal stress and external lateral pressure. The raw material of loose tube is usually polybutylene terephthalate (PBT), which has the advantages of high Young's modulus and low expansion coefficient, but PBT is easy to hydrolyze, brittle and relatively heat resistant. It is poor and the price is high; its crystallization performance is also weak, and there is shrinkage after extrusion in the extrusion molding process, which affects the control of the excess length of the optical fiber in the loose tube. [0003] Polypropyl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C48/09B29C48/285B29C48/88C08L23/12
CPCB29C48/09B29C48/297B29C48/9115C08L23/12
Inventor 张小敏
Owner JINLING INST OF TECH
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