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6640 (NMN) Polyester Film–Polyaramid Fiber Paper Soft Composite Material

6640 (NMN) is primarily used for inter‑slot, slot‑cover, and phase‑to‑phase insulation in low‑voltage motors; it can also serve as interlayer insulation in transformers or other electrical equipment.

Keywords:

insulation Material

Category:

Product Description

Product Applications

Product Description:

6640(NMN) is manufactured by laminating a polyester film with two layers of DuPont polyaramid fiber paper on the top and bottom surfaces, using an imported Class C adhesive. The surface N‑paper (imported polyaramid fiber paper) is made entirely from meta‑aramid fibers and is produced through calendaring.

The 6640(NMN) is a flexible composite material with an H‑class thermal 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.

6640(NMN) can be compounded with Class C adhesives, is compatible with nearly all resins and varnishes, and exhibits excellent resistance to acid and alkali corrosion.

Technical Requirements for the Polyester Film–Polyaramid Fiber Paper Composite Material 6640 (NMN50)

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±15	155±20	190±20	220±25	260±25	350±30	430±30	570±35
5	Stretching Intensity	Vertical	N/mm	≥70	≥150	≥160	≥180	≥220	≥270	≥320	≥350
5	Stretching Intensity	Horizontal	N/mm	≥60	≥90	≥110	≥130	≥180	≥200	≥250	≥280
6	Elongation	Vertical	%	≥10			≥12
6	Elongation	Horizontal	%	≥15			≥18
7	Breakdown Voltage	No bending	Kv	≥6	≥8	≥10	≥11	≥13	≥15	≥20	≥22
7	Breakdown Voltage	After bending	Kv	≥5	≥7	≥9	≥10	≥12	≥13	≥16	≥19
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.

Technical Requirements for the Polyester Film–Polyaramid Fiber Paper Composite Material 6640 (NMN40)

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

135±15

165±20

205±25

240±25

280±25

345±30

410±30

550±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.

6630/6630A(F-DMD) composite material

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