1.DESCRIPTION

FR-4 is created from alkali-free glass cloth that has been impregnated with epoxy resin by hot processing, It has high mechanical and electrical properties, good heat resistance and humidity resistance, so it is widely used in mechanical, electronic and electrical equipment as components of insulation parts.

sizes: 1020 X 1220mm/1220 X 2040mm / 1230X2470mm

2.FEATURES

Very low hygrometric susceptibility
Workable while cold up to 3mm.
Good dielectric properties
Higher mechanical properties when cold
Small losses at high frequency
High resistance to flame ( V-0 )

3.APPLICATIONS

Insulators for electrical equipment and appliances.

ITEMS CONDITIONS TEST METHOD VALUES
Thermic endurance in transformer oil for 4 hours IEC 60893-2-7.1 130ºC ( B)
Martin's Temp.
( perpendicular ) -- -- 200ºC min.
Specific weight 20ºC IEC 60893-2 1.80 - 2.0 g/cm3
Water absorption 24 h IEC 60893-2-8.2 1.0 mm - 18 mg
Flexural strength
( perpendicular ) 23 ± 2ºC IEC 60893-2-5.1 340 MPa min.
155ºC 170 MPa min.
Charpy impact strength
( parallel ) 23 ± 2ºC IEC 60893-2-5.4.2 33 KJ/m2 min.
Izod impact strength
( parallel ) 23 ± 2ºC IEC 60893-2-5.4.3 34 KJ/m2 min.
Electric strength
( perpendicular ) in transformer oil at 90 ± 2ºC IEC 60893-2-6.1 ≤3.0 mm 10.2KV/mm min.
Break down voltage
( parallel ) in transformer oil at 90 ± 2ºC IEC 60893-2-6.1 > 3.0mm 35 KV min.
Insulating resistances
After immersion in water 23 ± 2ºC IEC 60893-2-6.3 5.0 X 108W min.
Flammability UL94 IEC 60893-2-7.2 V-0

FAQ
Q: Are you trading company or manufacturer ?
A: Both

Q: How long is your delivery time?
A: Generally it is 3-5 days if the goods are in stock. or it is 5--15days if the goods are not in stock, it is according to quantity.

Q: Do you provide samples ?is it free or extra ?
A: Yes, we could offer the sample for free charge but do not pay the cost of freight.

Q: What is your terms of payment ? A: Payment<=2000USD, 100% in advance. Payment>=2000USD, 30% T/T in advance ,balance before shipment.