mica sheets punched

Mica sheet for microwave oven

Description:

Mica sheet for microwave ovens has excellent electrical insulation properties and high mechanical strength, so when using the mold tool pouched mica sheet (thickness 0.3-2.5mm) to the different designs of gasket material. Then the mica sheet gasket material can be used as the holder material in the Microwave oven. The following photo shows the mica sheet parts for a microwave oven and other electrical heating equipment.

mica sheet parts
mica sheet parts

How to use the rigid mica sheet gasket material in the microwave oven?

The high-quality mica sheet (thickness 0.3-2.5mm) should be punched to different shape mica parts, have held, notch…

Then fix the metal conductor on the mica parts.

How does the mica sheet work?

When electrical current conveyance a metal conductor, the conductor will have very high voltage, high temperature, and even fire breaking out.

That demand conductor’s holder material – mica gasket material has good mechanical strength, when in high voltage and high-temperature operation status.

Mica sheets Properties

Excellent flame-resistance, have good performance at temperature 500`1000 centigrade.

Good dielectric strength, the high voltage resistance is 20kv/mm

Good mechanical strength and toughness, good for machine process the special design in the microwave oven and other kinds of electrical heaters.

Eco-friendly, asbestos-free, smokeless, or seldom.

Type

HP5M

HP5P

HP5S

HP5M-G

HP5P-G

HP5M-L

HP5P-L

Test Method

Normal Thickness (mm)

0.1~3

0.1~3

0.1~3

4-100

4-100

0.1~3

0.1~3

IEC60371-3-3

Density g/cm3

1.7~2.25

1.7~2.25

1.7~2.25

1.7~2.35

1.7~2.35

1.7~2.25

1.7~2.25

IEC60371-3-2

Mica content %

≥90

≥90

≥90

≥90

≥90

≥90

≥90

IEC60371-3-2

Resin content %

≤10

≤10

≤10

≤12

≤12

≤8

≤8

IEC60371-3-2

Heat resistant ℃ 

Continual

500

700

1000

500

700

500

700

-

Intermittent

700

900

1100

700

900

700

900

-

Heat Loss

at 500℃ %

≤1

≤1

≤1

≤2

≤2

≤1

≤1

IEC60371-3-2

at 700℃ %

≤2

≤2

≤2

≤3

≤3

≤1.5

≤1.5

IEC60371-3-2

Flexural strength N/mm

≥160

≥150

≥160

≥180

≥180

≥150

≥150

GB/T5019

Water absorption 24H/23℃  %

≤1

≤1

≤1

≤0.5

≤0.5

≤2

≤2.5

GB/T5019

Dielectric strength KV/mm

≥20

≥19

≥20

≥20

≥20

≥18

≥18

IEC60243 at 23 ℃

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