A kind of microcable micropipe PBT sheath material and preparation method thereof

A sheathing material and microtube technology, applied in plastic/resin/wax insulators, organic insulators, electrical components, etc., can solve the problems of large shrinkage, failure to meet technical requirements, poor hot water performance, etc., to improve Toughness and overall molding shrinkage reduction effect

Active Publication Date: 2019-07-16
江阴爱科森博顿聚合体有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN105860447A discloses a method for modifying thermoplastic resin polyester elastomer for loose tubes. The specific process is to mix thermoplastic polyester elastomer and polybutylene terephthalate at a mass ratio of 80:20 to 20: After mixing at a ratio of 80, banbury in an internal mixer with a temperature of 240°C and a rotor speed of 40-60 rpm to obtain a modified thermoplastic polyester elastomer, but the application documents only involve improved materials and raw materials Compared with the impact strength, tensile strength and elongation at break, when the above-mentioned modified material with a large proportion of PBT is used as an optical cable sheath, the shrinkage of the material is relatively large, and the long-term hot water resistance is poor. Technical Requirements to Microtubules

Method used

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  • A kind of microcable micropipe PBT sheath material and preparation method thereof
  • A kind of microcable micropipe PBT sheath material and preparation method thereof
  • A kind of microcable micropipe PBT sheath material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-3

[0035] The composition of the microcable microtube PBT sheath material in Examples 1-3 is shown in the following table (component data are all calculated in parts by weight), and the polypropylene includes atactic polypropylene with an average molecular weight of 5000-9000.

[0036] The preparation method of sheath material comprises the following steps:

[0037] S1: Add the raw material as claimed in claim 1 to high-speed mixing;

[0038] S2: The reactor is evacuated to a vacuum degree of -0.08MPa, and the mixture is added to the reactor;

[0039] S3: Raise the temperature of the reactor to 180°C, perform solid-phase polycondensation and heat preservation reaction for 12 hours, and cool down to obtain the finished product of PBT sheathing material for microcables and microtubes.

[0040] Example 1 Example 2 Example 3 PBT 88 92 90 thermoplastic elastomer 3 5 4 Epoxy chain extender 2 5 3.5 Polyester nucleating masterbatch 1 3 2 ...

Embodiment 4-6

[0043] Examples 4-6 are based on Example 3, with the difference that: the polypropylene is a combination of atactic polypropylene and syndiotactic polypropylene, and the weight percentages of atactic polypropylene in the composition are 50%, 90%, and 70%, respectively.

[0044] The difference between the production process of embodiment 4-6 and embodiment 1-3 is:

[0045] S2: The reaction kettle is evacuated to a vacuum degree of -0.1MPa, and the mixture is added to the reaction kettle;

[0046] S3: The temperature of the reactor was raised to 250° C., and the solid-phase polycondensation reaction was carried out for 8 hours.

Embodiment 7

[0048]Embodiments 7-11 are based on Embodiment 6, and the difference is that the thermoplastic elastomer in Embodiment 7 is hydroxyl-terminated thermoplastic styrene-butadiene rubber, the thermoplastic elastomer in Embodiment 8 is a combination of polyether-type TPU, and the thermoplastic elastomer in Embodiments 9-11 The body is composed of hydroxyl-terminated thermoplastic styrene-butadiene rubber and polyether TPU, and the weight percentages of the thermoplastic elastomer polyether TPU are 25%, 53%, and 38% respectively.

[0049] In Examples 7-10, the Shore hardness of the hydroxyl-terminated thermoplastic styrene-butadiene rubber is not less than 68A, and the Shore hardness of the polyether TPU is 60-75A.

[0050] The difference between the production process of embodiment 7-10 and embodiment 1-3 is:

[0051] S2: The reactor is evacuated to a vacuum degree of -0.09MPa, and the mixture is added to the reactor;

[0052] S3: Raise the temperature of the reactor to 210° C., a...

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Abstract

The invention discloses a PBT (polybutylece terephthalate) sheathing compound for a micro cable and a micro pipe. The PBT sheathing compound is prepared from the following raw materials in parts by weight: 88 to 92 parts of poly butylene tertephehalate with viscosity being 0.95 to 1.05dl / g, 3 to 5 parts of thermoplastic elastomer, 2 to 5 parts of epoxy chain extender, 1 to 3 parts of polyester nucleating master batch, 0.5 to 3.5 parts of polypropylene and 0 to 0.10 part of flourescent brightener, wherein the polypropylene contains atactic polypropylene with average molecular weight of 5000 to 9000. The invention also discloses preparation method of the PBT sheathing compound for the micro cable and the micro pipe. The PBT sheathing compound has the advantages of high tenacity, high water resistance, anti-side pressure performance and the like, and meets the requirements of micro pipe special compounds.

Description

technical field [0001] The invention relates to the technical field of cable and microcable sheathing materials, in particular to a microcable and microtube PBT sheathing material and a preparation method thereof. Background technique [0002] With the development of access network and customer premise network, the advantages of micro-pipe and micro-cable are gradually highlighted. It can connect new users anytime and anywhere, install quickly, connect new users without affecting the lines already opened, and provide services according to user requirements. Various solutions and redundant lines must also ensure the avoidance of transitional pipeline excavation, maximize the use of existing pipeline resources, and quickly become an important development direction. [0003] Micropipes and microcables provide large elastic expansion capabilities, which greatly meet the sudden demand for optical fibers in urban broadband services. However, the harsh environment of micro-duct an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/02C08L23/12C08L9/06C08L75/08C08L53/02H01B3/42
CPCC08L67/02C08L2203/202C08L2205/025C08L2205/03C08L2205/035C08L2205/05C08L2207/04C08L2207/12H01B3/422C08L53/02C08L23/12C08L9/06C08L75/08
Inventor 苏迎旭黄小明
Owner 江阴爱科森博顿聚合体有限公司
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