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AHA, AHA-1 polyimide film–polyaramid fiber paper soft composite material

It is primarily used for motors of H class and above, or other specialized motor types, as slot-to-slot insulation, turn-to-turn insulation, layer-to-layer insulation, and lining insulation. Additionally, it can also serve as insulation material for special‑purpose transformers or other electrical equipment with high‑temperature‑resistance requirements.

Keywords:

insulation Material

Category:

Composite Series

National Defense Industry

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Product Description

Product Applications

Product Description:

The AHA polyimide film–polyaramid fiber paper soft composite material is manufactured by laminating a layer of polyimide film with two layers of polyaramid fiber paper on the top and bottom, using an imported Class C adhesive. The surface A paper (domestically produced polyaramid fiber paper) is made from 100% meta‑aramid fibers that have been calendered, ensuring compatibility with virtually all resins and varnishes, as well as excellent resistance to acid and alkali corrosion.

AHA is a flexible composite material with an H‑class heat resistance rating (180°C), exhibiting excellent mechanical properties such as tensile strength and edge tear resistance, as well as superior electrical strength. Its surface is smooth and it demonstrates strong adhesion to insulating varnishes.

AHA is primarily used in motors with H‑class insulation or other characteristic classes for slot‑to‑slot, turn‑to‑turn, layer‑to‑layer, and liner insulation; it may also serve as an insulating material in specialty transformers or other electrical equipment requiring heat resistance.

Performance Requirements for AHA Soft Composite Materials

Serial number	Indicator Name		Unit	Indicator value
1	Nominal thickness		mm	0.13	0.15	0.18	0.20	0.25	0.30	0.35	0.45
2	Structure		thousand	2-1.2-2	2-2-2	2-3-2	2-4-2	2-6-2	2-7.5-2	2-10-2	2-14-2
3	Thickness tolerance		mm	±0.015	±0.015	±0.02	±0.02	±0.02	±0.025	±0.030	±0.040
4	Quantitative (reference value)		g/m ²	125±20	155±20	185±25	215±25	290±25	345±35	430±35	585±45
5	Stretching Intensity	Vertical	N/mm	≥80	≥120	≥140	≥160	≥200	≥250	≥270	≥290
5	Stretching Intensity	Horizontal	N/mm	≥60	≥80	≥90	≥100	≥120	≥150	≥170	≥190
6	Elongation	Vertical	%	≥10
6	Elongation	Horizontal	%	≥8
7	Breakdown Voltage	No bending	Kv	≥6	≥8	≥10	≥11	≥12	≥13	≥15	≥18
7	Breakdown Voltage	After bending	Kv	≥5	≥7	≥9	≥10	≥11	≥12	≥12	≥15
8	Adhesion (220°C ± 2°C, 2 h)			No delamination, no bubbling, and no glue flow.
9	Long-term heat resistance temperature index (TI)			≥180
10	Test Method GB/T 5591.2-2002

Note: a) When there are other special requirements, they shall be determined through consultation between the supplier and the purchaser.

　　b) During slitting and use, care should be taken to prevent edge cracking and to avoid surface scratches as well as contamination from oil, dust, and foreign particles.

　　c) Performance parameters for thickness specifications not listed in the table shall be determined in accordance with the standards applicable to the nearest comparable thickness specification.

Performance Requirements for AHA-1 Soft Composite Material

Serial number

Indicator Name

Unit

Indicator value

Nominal thickness

0.13

0.15

0.18

0.20

0.23

0.30

0.33

0.40

Structure

thousand

1.5-2-1.5

1.5-3-1.5

1.5-4-1.5

1.5-5-1.5

1.5-6-1.5

1.5-8-1.5

1.5-10-1.5

1.5-14-1.5

Thickness tolerance

±0.013

±0.015

±0.018

±0.020

±0.023

±0.030

±0.040

Quantitative (reference value)

g/m ²

115±15

145±20

180±25

210±25

250±25

310±30

400±30

530±35

Stretching
Intensity

Vertical

N/mm

≥70

≥130

≥150

≥160

≥180

≥250

≥280

≥300

Horizontal

N/mm

≥60

≥85

≥110

≥120

≥130

≥200

≥210

≥230

Elongation

Vertical

≥10

≥12

Horizontal

≥15

≥18

Breakdown
Voltage

No bending

≥7

≥8

≥11

≥12

≥13

≥16

≥20

≥22

After bending

≥6

≥7

≥9

≥10

≥11

≥13

≥16

≥18

Adhesion (220°C ± 2°C, 2 h)

No delamination, no bubbling, and no glue flow.

Long-term heat resistance temperature index (TI)

≥180

Test Method GB/T 5591.2-2002

Note: a) When there are other special requirements, they shall be determined through consultation between the supplier and the purchaser.

　　b) During slitting and use, care should be taken to prevent edge cracking and to avoid surface scratches as well as contamination from oil, dust, and foreign particles.

　　c) Performance parameters for thickness specifications not listed in the table shall be determined in accordance with the standards applicable to the nearest comparable thickness specification.

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