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Factory Supply Electrical Insulating Sheet - D370 SMC Molded insulation sheet – D&F

Factory Supply Electrical Insulating Sheet - D370 SMC Molded insulation sheet – D&F

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Factory Supply Electrical Insulating Sheet - D370 SMC Molded insulation sheet – D&F Detail:

D370 SMC molded insulation sheet (D&F type number:DF370) is a kind of thermosetting rigid insulation sheet. It is made from SMC in mold under high temperature and high pressure. It is with UL certification and passed the test of REACH and RoHS, etc. It is also called as SMC sheet, SMC insulation board,etc.

SMC is a kind of sheet molding compound which consists of glass fiber reinforced with unsaturated polyester resin, filled with fire retardant and other filling substance.

SMC sheets have higher mechanical strength, dielectric strength, good flame resistance, tracking resistance, arc resistance and higher withstand voltage, as well as low water absorption, stable dimension tolerance and small bending deflection. SMC sheets are used for making all kinds of insulating boards in high or low voltage switch gears. It can also be used to process other insulation structural parts.

Thickness:2.0mm~60mm

Sheet size:580mm*850mm, 1000mm*2000mm,1300mm*2000mm, 1500mm*2000mm or other negotiated sizes

SMC (1)

SMC

SMC (2)

DMC

SMC SHEET

SMC sheets With different color

SMC (4)

SMC sheets

Technical Requirements

Appearance

Its surface shall be flat and smooth, free from blisters, dents and obvious mechanical damages. The   colour of its surface should be uniform, free from obvious exposed fiber. Free from obvious contamination, impurities and obvious holes. Free from delamination and crackles at its edges. If there are defects on the surface of the product, they can be patched. The superabundant ashes must be cleaned.

The bending deflection                                                     Unit: mm

Spec Dimension of shape Nominal thickness S Bending deflection Nominal thickness S Bending deflection Nominal thickness S Bending deflection
D370 SMC sheet Length of all sides ≤500 3≤S＜5 ≤8 5≤S＜10 ≤5 ≥10 ≤4
Length of any side 3≤S＜5 ≤12 5≤S＜10 ≤8 ≥10 ≤6
 
500 to 1000
Length of any side ≥1000 3≤S＜5 ≤20 5≤S＜10 ≤15 ≥10 ≤10

 

Performance requirements

Physical, mechanical and electrical properties for SMC sheets

Properties

Unit

Standard value

Typical value

Test method   
Density

g/cm3

1.65—1.95

1.79

GB/T1033.1-2008
Barcol hardness

-

≥ 55

60

ASTM D2583-07
Water absorption, 3mm thickness

%

≤0.2

0.13

GB/T1034-2008
Flexural strength,perpendicular to laminations Lengthwise

MPa

≥170

243

GB/T1449-2005
Crosswise

≥150

240
Impact Strength, parallel to laminations(Charpy, unnotched)

KJ/m2

≥60

165

GB/T1447-2005
Tensile strength

MPa

≥55

143

GB/T1447-2005
Tensile elasticity modulus

MPa

≥9000

1.48 x 104
Moulding shrinkage

%

-

0.07

ISO2577:2007
Compressive strength(perpendicular to laminations)

MPa

≥ 150

195

GB/T1448-2005
Compressive modulus

MPa

-

8300
Heat deflection temperature under load(Tff 1.8)

℃

≥190

＞240

GB/T1634.2-2004
Coefficient of liner thermal expansion(20℃–40℃)

10-6/K

≤18

16

ISO11359-2-1999
Electrical strength (in 25# transformer oil at 23℃+/-2℃,short-time test, Φ25mm/Φ75mm, cylindrical electrode  )

KV/mm

≥12

15.3

GB/T1408.1-2006
Breakdown voltage ( parallel to laminations, in 25# transformer oil at 23℃+/-2℃, 20s step-by -step test, Φ130mm/Φ130mm, plate electrode )

KV

≥25

＞100

GB/T1408.1-2006
Volume resistivity

Ω.m

≥1.0 x 1012

3.9 x 1012

GB/T1408.1-2006
Surface resistivity

Ω

≥1.0 x 1012

2.6 x 1012
Relative permittivity （1MHz）

-

≤ 4.8

4.54

GB/T1409-2006
Dielectric dissipation factor （1MHz）

-

≤ 0.06

9.05 x 10-3
Arc Resistance

s

≥180

181

GB/T1411-2002

Tracking resistance

CTI

V

≥600

600

Overpass

GB/T1411-2002

PTI

≥600

600

Insulation resistance

At normal condition

Ω

≥1.0 x 1013

3.0 x 1014

GB/T10064-2006

After 24h in water

≥1.0 x 1012

2.5 x 1013

Flammability

 Grade

V-0

V-0

UL94-2010

Oxygen index

℃

≥ 22

32.1

GB/T2406.1

Glow-wire test

℃

＞850

960

IEC61800-5-1

Withstand voltage

Nominal thickness（mm）

3

4

5～6

＞6

Withstand voltage in air for 1min    KV

≥25

≥33

≥42

＞48

 

Inspection, Mark, Packaging and Storage

1. Each batch should be tested before dispatch.

2.  According to the requirements of the customers, the test method of withstand voltage is negotiable according to the sheets or shapes.

3.  It is packed by cardboard box on pallet. Its weight is not more than 500kg per pallet.

4.  The shee ts shall be stored in a place where temperature is not higher than 40℃, and be placed horizontally on a bedplate with a height of 50mm or above. Keep away from fire, heat (heating apparatus) and direct sunshine. The storage life of sheets is 18 months from the date of leaving factory. If the storage duration is over 18 months, the product also could be used after being tested to be qualified.

5. Others shall accord with the stipulations of GB/T1305-1985,General rules for the  inspection,marks,packing, transportation and storage of insulation thermosetting material.

Certification

SMC (5)

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Our business promises all users of the first-class items and the most satisfying post-sale company. We warmly welcome our regular and new prospects to join us for Factory Supply Electrical Insulating Sheet - D370 SMC Molded insulation sheet – D&F , The product will supply to all over the world, such as: Malawi, European, Lahore, Based on our guiding principle of quality is the key to development, we continually strive to exceed our customers' expectations. As such, we sincerely invite all interested companies to contact us for future cooperation, We welcome old and new customers to hold hands together for exploring and developing; For more information, be sure to feel free to contact us. Thanks. Advanced equipment, strict quality control, customer-orientation service, initiative summary and improvement of defects and extensive industry experience enable us to guarantee more customer satisfaction and reputation which, in return, brings us more orders and benefits. If you are interested in any of our merchandise, make sure you feel free to contact us. Inquiry or visit to our company are warmly welcome. We sincerely hope to start a win-win and friendly partnership with you. You can see more details in our website.
We have been engaged in this industry for many years, we appreciate the work attitude and production capacity of the company, this is a reputable and professional manufacturer.
5 Stars By Amber from Burundi - 2018.02.21 12:14
As a veteran of this industry, we can say that the company can be a leader in the industry, select them is right.
5 Stars By Maggie from Congo - 2018.06.19 10:42

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