Product Details

Product Description

One Side Grinding FR4 Material Epoxy Resin Insulation Sheet

Grinding FR4 board is made of fiberglass cloth impregnated with epoxy resins and phenolic resins.

pressing under high heat and pressure to become epoxy board,and grinding to a flater condition.

Widely used to transformers, electric motors,household appliance, railway and automobile appliance,etc.

Technical Data

One Side Grinding FR4 Material Epoxy Resin Insulation Sheet

Basic Information
Product name	One Side Grinding FR4 Material Epoxy Resin Insulation Sheet
Material	Fiberglass cloth and epoxy/phenolic resin
Grade	Grade A & Grade B or customer demands
Technical Performance
Density	2.2g/cm 3
Combustibility	UL94 V-0
Water absorption	≤6.5mg
Formation methods	High temperature and high pressure and grinding
Reference Standard	GB/T1303.1-1998
Thermal stability in 24H	≥200°C
Dielectric constant (1MHz)	5.14
Impact strength parallel to laminations (Charpy)	≥45.3 KJ/m 2
Flexural strength perpendicular to lamination	≥350 Mpa
Insulation resistance after impregnated in water	1.5*10 13 Ω
Breakdown voltage parallel to laminations (in 90±2°C transformer oil)	≥40 KV
Laminations (Charpy) Dielectric strength perpendicular to laminations (in 90±2°C transformer oil,1mm in thickness)	≥10.7 MV/m