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Electrician-used insulated soft composite material preparation method

A composite material and manufacturing method technology, applied in the direction of insulators, circuits, electrical components, etc., can solve problems affecting the safety and reliability of motors, incomplete curing of adhesives, and unfavorable bonding performance, so as to improve safety and reliability , easy to operate, good bonding effect

Inactive Publication Date: 2016-02-03
CHINA XIDIAN GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the thermal bonding of polyimide film and polyaramid fiber paper soft composite materials is affected by many factors in the preparation process, such as winding tension, composite speed and oven temperature, etc., which are prone to composite unevenness and adhesive curing. Incomplete and other phenomena, resulting in poor thermal bonding, motors use insulation materials with poor thermal bonding for a long time, especially in long-term high-temperature environments, NHN may appear delamination and foaming, which will affect the performance of the motor safety and reliability
At the same time, different adhesives will also cause differences in the properties of the prepared materials, which is not conducive to the improvement of bonding performance.

Method used

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  • Electrician-used insulated soft composite material preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Step 1. Glue preparation: in parts by mass, take 5 parts of polyurethane main agent and dissolve with 8 parts of ethyl acetate, then add 1 part of curing agent to mix, and stir evenly to obtain polyurethane glue.

[0038] Step 2. Glue coating: After the polyurethane glue is prepared, set the temperature of the oven to 55°C in zone I, 100°C in zone II, and 105°C in zone III. The polyaramid fiber paper is unrolled at the same time, and the speed of the machine is 10m / min. Polyurethane glue is coated on both sides of the polyimide film, and then dried in an oven to obtain a polyimide film with glue. The amount of dry glue on the imide film is 18g / m 2 .

[0039] Step 3: Composite and winding: the polyaramid fiber paper passes through the guide roller, and is composited with the glued polyimide film exiting the oven, and then wound to obtain a roll-shaped composite material with a winding tension of 35N.

[0040] Step 4. Post-curing treatment: Post-cure the rolled product....

Embodiment 2

[0050] Step 1. Glue preparation: in parts by mass, take 5 parts of polyurethane main agent and dissolve it with 7 parts of ethyl acetate, then add 1 part of curing agent to mix, and stir evenly to obtain polyurethane glue.

[0051] Step 2. Glue coating: After the polyurethane glue is prepared, set the oven temperature to 50°C in zone I, 90°C in zone II, and 90°C in zone III. After the temperature of the oven rises to the set value, drive the polyimide film and The polyaramid fiber paper is unrolled at the same time, and the speed of the machine is 10m / min. Polyurethane glue is coated on both sides of the polyimide film, and then dried in an oven to obtain a polyimide film with glue. The amount of dry glue on the imide film is 20g / m 2 .

[0052] Step 3: Composite and winding: the polyaramid fiber paper passes through the guide roller, and is composited with the glued polyimide film exiting the oven, and then wound to obtain a roll-shaped composite material with a winding tensi...

Embodiment 3

[0055] Step 1. Glue preparation: in parts by mass, take 5 parts of polyurethane main agent and dissolve it with 9 parts of ethyl acetate, then add 1 part of curing agent to mix, and stir evenly to obtain polyurethane glue.

[0056] Step 2. Glue application: After the polyurethane glue is prepared, set the temperature of the oven to 60°C in zone I, 105°C in zone II, and 105°C in zone III. The polyaramid fiber paper is unrolled at the same time, and the speed of the machine is 10m / min. Polyurethane glue is coated on both sides of the polyimide film, and then dried in an oven to obtain a polyimide film with glue. The amount of dry glue on the imide film is 14g / m 2 .

[0057] Step 3: Compounding and winding: the polyaramid fiber paper passes through the guide roller, and is compounded with the glued polyimide film exiting the oven, and then wound to obtain a roll-shaped composite material with a winding tension of 40N.

[0058] Step 4, post-curing treatment: Post-cure the rolled p...

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Abstract

The invention relates to an electrician-used insulated soft composite material preparation method. Polyurethane sol is firstly applied to a polyimide film, segmented drying is carried out at a temperature of 50 to 105 DEG C, the initial curing degree of the adhesive is ensured, the polyimide film with the adhesive is obtained, the polyimide film with the adhesive is then subjected to two-sided composition with aramid fiber paper, winding and then post-curing treatment are carried out, the adhesive is completely cured, and thus the needed electrician-used insulated soft composite material is obtained. The steps are simple, the operation is convenient, the polyimide film and the aramid fiber paper have good heat-resisting performance, the heat-resisting performance of the obtained product is as high as 220-level, the thermal bonding performance meet 220+ / -2 DEG C, requirements of non delamination, non foaming and non adhesive flowing for 48h can be met, high demands from electrodes and the like can be met, and safety and reliability of the motor can be improved effectively.

Description

【Technical field】 [0001] The invention belongs to the field of insulating materials, and relates to a method for manufacturing an insulating soft composite material for electricians. 【Background technique】 [0002] For the ground-to-ground, inter-turn and gasket insulation of existing motors and electrical coils, the polyimide film polyaramid fiber paper soft composite material (NHN) generally used is H-level, and its thermal adhesion requirements (200± 2) °C, no delamination, no foaming, no gel flow within 10 minutes. However, the thermal bonding of polyimide film and polyaramid fiber paper soft composite materials is affected by many factors in the preparation process, such as winding tension, composite speed and oven temperature, etc., which are prone to composite unevenness and adhesive curing. Incomplete and other phenomena, resulting in poor thermal bonding, motors use insulation materials with poor thermal bonding for a long time, especially in long-term high-tempera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B19/00
Inventor 刘园园李贤斌
Owner CHINA XIDIAN GRP CO LTD
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