S/N

Properties

Unit

Requirements

Test Criteria

1

Appearance

1.1

Pre-forming appearance

The pre-formed plastic should be uniform and consistent, with no foreign impurities.

1.2

Post-forming appearance

The surface of the molded component after forming should be flat and smooth, with a uniform color, free of bubbles and cracks.

2

Mechanical Properties

2.1

Notched Impact Strength of Simply Supported Beam

KJ/m²

≥9

GB/T 1043.1-2008

2.2

Bending strength

MPa

≥78

GB/T 1449-2005

3

Thermal Properties

3.1

Heat deflection temperature (at 1.8 MPa)

℃

≥250

GB/T 1634.2-2004

3.2

Ball pressure test

℃

≥175

GB/T 5169.21-2006

3.3

Linear thermal expansion coefficient

10^-6/K

≤25

ISO 11359-2: 1999

3.4

Temperature index (TI-Elec)

℃

≥130

GB/T 11026.1-2003

4

Electrical Properties

4.1

Dielectric strength (in transformer oil at 90 ± 2°C)

kV/mm

≥11

GB/T 1048.1-2006

4.2

Insulation resistance

Under normal conditions

Ω

≥10¹³

GB/T 10064-2006

4.3

After 24-hour immersion in water

≥10¹²

GB/T 10064-2006

4.4

Dielectric loss factor (100HZ)

-

≤0.02

GB/T 1409-2006

4.5

Relative dielectric constant (100HZ)

-

≤4.5

GB/T 1409-2006

4.6

Proof tracking index (PTI)

V

≥600

GB/T 4207-2003

4.7

Arc resistance

s

≥180

GB/T 1411-2002

5

Flammability Properties

5.1

Flammability

rating

5VA

UL-94

5.2

Glow-wire flammability index

℃

≥ 850°C

GB/T 5169.12-2006

6

Physical and Chemical Properties

6.1

Density

g/cm³

1.8±0.1

GB/T 1033.1-2008

6.2

Water absorption (23°C for 24h)

%

≤0.15

GB/T 1034-2008

6.3

Mold shrinkage

%

≤0.04

JB/T6542-2006

6.4

Flowability

mm

450~550

7

Other Properties

7.1

Environmental properties

Compliance with relevant environmental standards