• q8.jpg

Insulation sheet

We’re a OEM factory for automotive and motorcycle parts, with a complete production line. At present, our products include vehicle lighting fixtures, such as headlights, taillights, turn signals, reflectors etc. Motorcycle accessories, such as motorcycle risers, grips, pedals, switches and other vehicle accessories.



FR4 (or FR-4) is a NEMA grade designation for glass-reinforced epoxy laminate material. FR4 is a composite material composed of woven fiberglass cloth with an epoxy resin binder that is flame resistant (self-extinguishing).

"FR" stands for flame retardant, and denotes that the material complies with the standard UL94V-0.

FR4 glass epoxy is a popular and versatile high-pressure thermoset plastic laminate grade with good strength to weight ratios. With near zero water absorption, FR4 is most commonly used as an electrical insulator possessing considerable mechanical strength. The material is known to retain its high mechanical values and electrical insulating qualities in both dry and humid conditions. These attributes, along with good fabrication characteristics, lend utility to this grade for a wide variety of electrical and mechanical applications.

Epoxy Fiberglass Cloth Laminated Sheet FR-4

Thickness: 0.2-50 mm

Dimensions: 1020*1220/1220*2440 mm

Temperature Resistance: 180-200℃

Color: light green / black (can be customized)

Features: Flame retardant, All colors are available, Bein good mechanical and insulating property even inhigh temperature conditions


G10/FR4 glass epoxy sheet

Standard color:Green,Black,Yellow

Standard size:1020*1220mm,1220*2440mm

Standard Thickness:0.2-50mm


Features/fiberglass epoxy plate FR4/G10 sheet

● Better insulating properties than Fish Paper(Vulcanized Fiber)

● Excellent Strength properties

● Anti-Fire properties

● Retains 50%flexural strength at 150’C

● Performs special well in humid environments


Application/fiberglass epoxy plate FR4/G10 sheet

● Sensitive electronic equipment

● Circuit Board manufacturing

● Relays and Switches

● Communication systems

● Mechanical and appliances lines

Keywords: Insulation sheet


Longkou Libo Insulating Material Co., Ltd.

The company are specialized in providing Electrical Polyester Non-woven Fabric that is made of insulation laminated paper DMD(with product thickness: 0.02 mm-0.23mm, and width: 510mm-1500mm), Insulation Composite Laminated Material(DMD,NMN,NHN,100% saturated DMD,Aramid Paper,Diamond dotted paper),Insulation fiberglass Sleeving(2715PVC  fiberglass sleeves,2751Silicone rubber fiberglass sleeves,2740 Acrylic fiberglass sleeve, 2753 Silicone fiberglass sleeves, PU fiberglass sleeve) , Mylar film(Polyester film, Milky white mylar film), Insulation sheets(3240,G10,FR4,etc.) and other electrical insulating material. They are used in motor,transformer, generator,reactor,etc. We have gained ISO9001,SGS and material ROHS and REACH certificate.




Can you send us a sample to test quality before ordering ?


Yes, we can provide sample for free but the freight and other charges is payed by the customers.


Can you help us do the custom clearance ?


Yes, we can. We can help you find a professional custom clearance company to do it. 


Can we get the goods without your company name to export ?


Yes, we can. We are allowed to use your designated agent's name if you have one..


Can I have a sample order?


Yes, we welcome sample order to test and check quality. Mixed samples are acceptable.


How can you guarantee the quality of mass goods is same as the sample sent to me before?


We kept another same sample and marked on company when we sent to customer. So our production will be based on.


Could we pay a visit to your factory ?


Yes, you are always welcome to visit our factory.


Can you produce the products with my own brand ?


Yes, we have been offering OEM service for 10 years.

Send Inquiry

NOTE: Please leave your email, our professional person will contact you asap!

Contact Us

Dongtai industry park, Zhuyouguan town, Longkou city, Shandong,China, Yantai, Shandong

Product Center

Our company specialized in producing Insulation Paper, Insulation Fiberglass Sleeving and other electrical insulating material. 

Follow us


Copyright © Longkou Libo Insulating Material Co., Ltd.

Business license