How To Choose Electrical Insulating Sheets

It is quite essential to know the insulation properties of the materials, including dielectric strength, compressive strength, tensile strength, pressure resistance, impact resistance, corrosion resistance, cryogenic resistance, and flame resistance. The below information will help you to choose sheet materials according to your application requirement. You can download the related datasheet here for your reference.

Epoxy Fiberglass Cloth Sheet

Insulation grade: B class
Thickness: 0.012″ – 5.9″
Dimension: 40″ x 80″, 48″ x 80″, 48″ x 96″

Epoxy fiberglass cloth laminated sheet is made of non-alkali fiberglass cloth for electrical purposes impregnated with epoxy resin and phenolic resin under heat and hot pressing with excellent dielectric property and mechanical property, strong mechanical processing property, and good moisture resistance.

Due to its high mechanical properties at medium temperature, epoxy laminate is suitable for the high insulation structure of mechanical, electrical, and electronic components. ​It can be processed into various insulation accessories and insulation structural parts of types of equipment and can be used in a humid environment and transformer oil.

FR4/G10 Glass Fiber Sheet

Insulation grade: B class
Thickness: 0.0079″ – 5.9″
Dimension: 40″ x 80″, 48″ x 80″, 48″ x 96″

FR4/G10 Glass Fiber Sheet is a composite sheet material that consists of glass fabric, electrical grade epoxy resin. The epoxy material is extremely strong and stiff, has a low coefficient of thermal expansion, and has outstanding electrical properties. Epoxy resins are among the most versatile and widely used plastics in the electronics field, primarily because water absorption is virtually nil, rendering it an outstanding insulator.

Beyond its electrical insulating properties, epoxy resins exhibit great dimensional stability and superior adhesive properties. FR4/G10 has extremely high mechanical strength, good dielectric loss properties, and good electric strength properties, both wet and dry.

FR4/G10 glass fiber sheet has extremely high mechanical strength, good dielectric loss properties, and good electric strength properties, both wet and dry.

Phenolic Cloth Sheet

Insulation grade: E class
Thickness: 0.02″ – 4.0″
Dimension: 40″ x 80″, 48″ x 96″

Phenolic Cotton Cloth Laminated Sheet is a laminated material made by hot pressing of cotton cloths impregnated with a thermosetting phenolic resin binder.

Phenolic sheet has high compression strength and increased resilience, favorably lends itself to machining by drilling, cutting and forging. That is why it is widely used to make parts loaded with reversed electrical and mechanical stresses or working under friction (bushings, cams, etc.). Phenolic resin board is used as an insulating material for work in transformer oil and in the air at a normal relative humidity of the environment and at 50 Hz of frequency.

Multi-Color G10 Knife Handle Materials

Insulation grade: B class
Thickness: 0.012″ – 7.8″
Dimension: 40″ x 80″, 48″ x 80″, 48″ x 96″

G10 handle materials are made of electrical alkali-free glass fiber cloth dipped in epoxy resin, and processed by baking and hot pressing in the forming mold. Our G10 is first quality with good structure, absolutely no foreign matter or defects of any kind, very closed thickness tolerance, flat and straight panel, smooth and clean surfaces. It has a very bright color, good structure with a clear layer. Especially be suitable for Surfboard fins, Knife handle, and other sports appliances.

Colored G10 Epoxy Laminate can be made into Single colors or Multi-layered colors (G10 Mixed Color). Usual colors are available in Black, White, Red, Yellow, Blue, Orange, Olive Green, Gray, Brown, and more than 34 colors We also customize colors according to sample or color code.

Bakelite Sheet

Insulation grade: B class
Thickness: 0.006″ -4.0″
Dimension: 40″ x 80″, 48″ x 80″, 48″ x 96″

Bakelite sheet laminates normally consist of fiber paper, cotton fabric, chemical fiber yarn, and fiberglass, etc. It is suitable for high-performance requirements of electrical machinery, electrical equipment as insulating structural parts, and transformer oil. Room temperature electrical properties with good machining performance with excellent electrical, mechanical, and processing properties.

The normally used Bakelite sheet Color is Orange and Black. Our Bakelite has high mechanical and dielectric properties, good heat resistance and wave resistance, and good machinability. It is widely used in motors, electrical equipment for insulation structure parts, PCB test rack, and etc.

GPO-3 Thermoset Sheet

Thickness: 0.08″ – 3.94″
Dimension: 40″ x 80″, 48″ x 79″, 49″ x 98″

GPO-3 sheet is a glass-reinforced thermoset polyester sheet material. GPO-3 material is strong, stiff, dimensionally stable, and impact resistant. GPO-3 material also has excellent electrical properties including flame, arc, and track resistance. It is widely used for electrical insulating applications. GPO-3 sheet is also used for mechanical applications where strength, stiffness, dimensional stability, and relatively low cost are required.

GPO-3 also called Upgm203 is typically used in-phase and end barriers, insulation support, bus bar support, mounting panels, transformers, antenna bases, and spacers.

GENERAL Applications 【Industries We Serve】the new energy industry

Power Generation

【Power Generation】

Power Transmission

【Power Transmission】

New Energy Industry

【New Energy Industry】

Electrical insulation materials are used for preventing arcing in transformers, stabilizers, circuit breakers, etc. They can withstand insulating properties up to a specified electrical breakdown voltage.

In transformers, the dimensional stability and good dielectric features of the electrical insulation are crucial features. High voltage electrical transformers need insulating materials that can withstand high electrical and physical stresses. High-temperature insulation materials are particularly important to protect components from heat damage in the new energy industry


Bulk Production

We have 2 factories and 5 production lines in China mainland and can produce different material types of insulation materials. Production capacity will meet the needs of different customers. If your demand is huge, we can start up 5 production lines to ensure the delivery time.

CNC Machining

We have everything you need to get custom machining parts. Our CNC machine shop that’s extensively equipped to produce your components economically regardless of order quantity. All you have to do now is give us your requirements and parts’ drawings. Our custom CNC machining service to make the part for you.

Packing & Shipping

In order to ensure that the goods are not easily damaged in transit, we use plywood boxes as outer packing. At the same time, our insulation material will be wrapped with a layer of PP film to ensure that the goods will not be affected by moisture. We use wooden cases or pallets with IPPC marks, which fully meet the import requirements.

The Process Flow & Duration Estimation

Please note that the final cost depends on the customized service you require, the specifications of the raw materials used, the relevant national laws, and the distance of transportation. Take the example of booking a tall container of products:

STEP1: Requirements Communication 1-3 Days

The first step is that we can talk about the thickness, customized size, temperature resistance grade, quantity, and all of your requirements. If you need machining parts, you can provide the drawings, tolerance range, and raw materials requirements to us. Then our engineers will check and reply to your every question so that you can understand clearly about our production planning.

STEP2: Sampling 1-3 Days

For purchasing insulation sheet materials, we will provide 1-2 pieces samples in A4 size for your testing. If you request machining parts, we will process samples according to the confirmed design drawing. Due to the processing difficulty, the time will be different. In general, a4 size sheet samples can be done within 1 day. And machining parts will be within 3 days. Then we will send them to you.

STEP3: Contract & Payment 1 Day

Once the details of the proforma invoice are confirmed by both of us, you can arrange the deposit for us according to the invoice. Meanwhile, we can also provide a Confidentiality Agreement, Quality Assurance Agreement, and International Trade Contract to you. Anyway, you will be safe in doing business with us.

STEP4: Manufacturing & Testing 15-20 Days

The bulk manufacture will be started according to the confirmed sample. We should prepare related raw materials and finish your order. After the end of production, our special testing department will test this batch of products and issue a quality certificate. Ensure that the quality of each product is up to standard before it leaves the factory. All will be finished in about 15-20 days.

STEP5: Shipping 10-15 Days

We will book the shipping space in advance while packing your order goods. The goods will be sent to the nearest seaport as soon as they are packed well. We know that due to the epidemic, booking shipping space is more difficult than before, and many cargo ships can not reach Chinese ports on time. Now what we do is to try our best to deliver the goods to the port on time, for saving your time.

A Brief Self-Nomination, Why Choose Us

Yongxing was found in 1990 in China and committed to producing electrical insulation materials. We are very strict in producing our products, going through several processes from the transportation of raw materials to processing the finished products. We want to ensure that every insulation material you receive is of high performance and quality.
Youda will also perform custom fabrication and secondary machining to better qualify these products to your specific needs. View more!

Dedicated Warehouse & Machining Workshop

The FAQs Throughout The Trading Process

XXX has been producing electrical insulation materials for 30 years and has encountered all kinds of problems. Here are the most important concerns of our customers before closing the deal.