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Boiling and high-temperature resistant polyester thermal contraction material and preparation method thereof

A technology of high temperature resistant polyester and heat shrinkage, applied in capacitor parts and other directions, can solve the problems that PVC heat shrinkable sleeve cannot meet the requirements, PVC heat shrinkable sleeve cannot meet the requirements, can not meet the requirements, and can solve the problem of poor appearance. Effect

Active Publication Date: 2012-08-22
CYG CHANGTONG NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In terms of water boiling resistance required by simulating the production or use of electrolytic capacitors in this industry, it is required to boil in boiling water for 5 minutes directly after shrinkage on the surface of the capacitor, or to boil in boiling water for 15 minutes after shrinkage and aging, and the appearance is still good. The sleeve cannot meet the requirements, and the conventional PET heat-shrinkable sleeve is also difficult to withstand such test conditions
At the same time, in the industry simulating the production or use of electrolytic capacitors and requiring repeated high temperature aging resistance, the shrink sleeve is required to still have a good appearance after aging at a temperature of 85°C to 125°C for several hours, and the PVC heat shrinkable sleeve cannot meet this requirement. Requirements, conventional PET heat-shrinkable tubing, as an ideal substitute for PVC heat-shrinkable tubing, cannot meet these special requirements

Method used

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  • Boiling and high-temperature resistant polyester thermal contraction material and preparation method thereof
  • Boiling and high-temperature resistant polyester thermal contraction material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Take by weighing the raw material that prepares boiling-resistant high-temperature resistant polyester heat-shrinkable material by following formula:

[0024] 35kg polyethylene terephthalate (PET), 25kg ethylene glycol modified - polyethylene terephthalate (PETG), 15kg polybutylene terephthalate (PBT), 10kg poly Hexamethylene adipamide (PA66), 5kg SEBS elastomer, 10kg polyethylene naphthalate (PEN) and 0.05kg calcium stearate.

[0025] Dry the weighed ethylene glycol-modified-polyethylene terephthalate (PETG) at 70°C to 75°C for 5 to 7 hours; then dry the dried ethylene glycol-modified-polyethylene terephthalate Ethylene glycol diformate (PETG) and other components are added to a high-speed mixer and mixed evenly, and then mixed and granulated by a twin-screw extruder. The twin-screw extruder is equipped with five heating zones from the feeding section to the die head, and self-feeding The temperature of each zone from the first section is: 230±10°C, 240±15°C, 245±15°C...

Embodiment 2

[0028] Adopt the preparation method of embodiment 1, change the prescription of boiling-resistant high-temperature resistant polyester heat-shrinkable material as follows:

[0029] 40kg polyethylene terephthalate (PET), 15kg ethylene glycol modified - polyethylene terephthalate (PETG), 20kg polybutylene terephthalate (PBT), 10kg poly Hexamethylene adipamide (PA66), 5kg SEBS elastomer, 10kg polyethylene naphthalate (PEN) and 0.03kg zinc stearate.

[0030] Sampling is taken from the casing, and the casing is shrunk on the surface of the capacitor and placed in boiling water for 5 minutes, or the casing is shrunk on the surface of the capacitor and aged at 85~105°C for 15~30 minutes, then placed in boiling water for 15 minutes After 10 minutes, and after shrinking on the surface of the capacitor and aging at 125°C for 6 hours, it still maintains a good appearance.

Embodiment 3

[0032] Adopt the preparation method of embodiment 1, change the prescription of boiling-resistant high-temperature resistant polyester heat-shrinkable material as follows:

[0033] 35kg polyethylene terephthalate (PET), 20kg ethylene glycol modified - polyethylene terephthalate (PETG), 15kg polybutylene terephthalate (PBT), 10kg poly Hexamethylene adipamide (PA66), 5kg SEBS elastomer, 15kg polyethylene naphthalate (PEN) and 0.04kg calcium stearate.

[0034] Take samples from the finished bushing, shrink the bushing on the surface of the capacitor and boil it in boiling water for 5 minutes, or put the bushing on the surface of the capacitor and age it at 85~105°C for 15~30 minutes and then boil it in boiling water for 15 minutes After 10 minutes, and after shrinking on the surface of the capacitor and aging at 125°C for 6 hours, it still maintains a good appearance.

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Abstract

The invention discloses a boiling and high-temperature resistant polyester thermal contraction material. The thermal contraction material comprises the following components in part by weight: 20 to 40 parts of polyethylene terephthalate (PET), 15 to 25 parts of modified polyethylene terephthalate glycol (PETG), 10 to 20 parts of polybutylene terephthalate (PBT), 5 to 10 parts of polyhexamethyleneadipamide (PA66), 1 to 5 parts of thermoplastic elastomer (TPE) and 5 to 15 parts of polyethylene naphthalate (PEN). After a sleeve made of the thermal contraction material is contracted on the surface of a capacitor and then directly boiled for 5 minutes in boiling water or contracted and aged and then boiled for 15 minutes in boiling water and contracted on the surface of the capacitor and thenrepeatedly aged for 6 hours at the high temperature of 125 DEG C, good appearance can be kept. The invention also discloses a preparation method for the boiling and high-temperature resistant polyester thermal contraction material.

Description

technical field [0001] The invention relates to a heat-shrinkable material for electrolytic capacitor insulation protection or marking and a preparation method thereof, in particular to a boiling-resistant and high-temperature-resistant polyester heat-shrinkable material for electrolytic capacitor insulation protection or marking and a preparation method thereof. Background technique [0002] As an environmentally friendly alternative to PVC heat-shrinkable sleeves, PET heat-shrinkable sleeves are widely used in electrolytic capacitors, especially aluminum electrolytic capacitors with high requirements for insulation protection, replacing PVC heat-shrinkable sleeves. Compared with PVC, the environmentally friendly PET heat-shrinkable sleeve has a good improvement in heat shrinkage, heat resistance, water resistance, and solvent resistance. In terms of water boiling resistance required by simulating the production or use of electrolytic capacitors in this industry, it is requ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/02C08L77/06C08L53/02B29B9/06B29C47/92H01G9/004B29C48/92
Inventor 曹斌刘亚军彭锐于恩敬徐焕辉
Owner CYG CHANGTONG NEW MATERIAL
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