Laminated Tubes

Beijing Friend Group: Your Professional Laminated Tubes Manufacturer!

Founded in 1996, Beijing Friend Group is headquartered in Beijing Yizhuang Economic and Technological Development Zone. The company's main products include epoxy glass laminated sheets, phenolic cotton laminated sheets, phenolic paper laminated sheets, polyester molded products, laminated rods, composite profiles, etc.

F810 EPGC21 (130℃) Epoxy glassLaminated Tubes
F810 EPGC21 (130℃) is made of alkali-free glass fabric and binded with epoxy resin, in heat rolling and tightening, baking and curing, with high mechanical property and stable electrical property...
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3526 (PFCC22) Phenolic Cotton Laminated Tubes
3526 laminated tube, similar to IEC PFCC22 laminated tube, is a composite tube made of laminated phenolic resin and cotton cloth, which is widely used in electrical insulation and mechanical...
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PFCC21 Laminated Tubes
PFCC21 phenolic cotton tube is a composite tube made of laminated phenolic resin and cotton cloth, which is widely used in electrical insulation and mechanical protection fields. It has certain...
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3520 (Phenolic Tube) Laminated Tubes
3520 tube, phenolic laminated paper tube is a thermosetting phenolic laminated paper tube made of insulating coil paper as base material and phenolic resin as binder by hot roll baking curing....
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3640 (Epoxy Tube) Laminated Tubes
3640 tube, Epoxy phenolic laminated glass cloth tube is made of non-alkali glass cloth soaked with epoxy phenolic resin, and baked by hot roll. 3640 tube has high mechanical properties, heat...
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F810 (EPGC21) Laminated Tubes
F810 tube, similar to IEC EPGC21, made from alkali-free glass fiber cloth as the base material, using epoxy resin as the binder, and are manufactured by heating, rolling, pressing, and baking to...
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F812(EPGC22) Laminated Tubes
F812 tube, similar to IEC EPGC22, made from alkali-free glass fiber cloth as the base material, using epoxy resin as the binder, and are manufactured by heating, rolling, pressing, and baking to...
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F811(EPGC23) Laminated Tubes
F811 tube, similar to IEC EPGC23,tubes made from alkali-free glass fiber cloth as the base material, using epoxy resin as the binder, and are manufactured by heating, rolling, pressing, and baking...
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Why choose us?

Professional Team

Staffed by a team of highly skilled professionals, including 2 Ph.D. holders and 9 master's degree experts, the center is at the forefront of technological innovation.

Advanced Equipment

The Friend Group Testing Center is equipped with a comprehensive suite of advanced testing instruments, meeting the highest standards for insulation material testing.

Quality Control

With its unwavering dedication to research, technological advancement, and quality assurance, the Beijing Friend Group R&D Center continues to set new benchmarks in the industry, reinforcing its position as a leader in insulation materials and new material innovation.

Sales Market

Our products are now exported to dozens of countries across Asia, Europe, Africa, North and South America, and Oceania, earning widespread recognition and trust from clients worldwide.

Benefits of Laminated Tubes

High Mechanical Strength

Our composite tubing, made from phenolic and fiberglass reinforced with Phenolic or Epoxy resins, offers superior mechanical strength. This makes it suitable for high-stress applications where durability and reliability are paramount.

Thermal Resistance

The use of Phenolic and Epoxy resins ensures excellent thermal resistance, allowing our tubing to maintain integrity and performance under high temperatures. This characteristic is especially beneficial in applications involving heat exposure.

Electrical Insulation

Composite tubing provides outstanding electrical insulation properties, making it an ideal choice for electrical and electronic applications. The materials used prevent conductivity, enhancing safety and functionality.

Chemical Resistance

Our tubing is highly resistant to chemicals and corrosion, thanks to the protective qualities of Phenolic and Epoxy resins. This resistance extends the life of our products in harsh chemical environments.

Dimensional Stability

The combination of fiberglass and resin provides exceptional dimensional stability, ensuring that the tubing retains its shape and size across a range of temperatures and physical stresses.

Product Specifications

Dimensions (L)	1000	MM
Dimensions (L)	Other dimensions	MM
Density	≥1.03	g/cm³
Flexural strength	≥50	MPa
Bonding strength	≥70	MPa
Electric strength perpendicular to laminations (withstand voltage) (in oil, 90±2℃) wall thickness: 2.0 mm	≥8.5	kV/mm
Breakdown voltage parallel to laminations (in oil, 90±2℃)	≥20	kV
Thermal stability (24 h)	120℃	PASS
Water absorption rate, 3 mm in thickness	≤8.0	Mg/cm²
Compression strength(Axial)	≥50	MPa

Application of Laminated Tubes

Electrical and electronics industry

In the electrical and electronics sector, laminated tubes serve as essential components. They are widely used as insulating sleeves for transformers, coil formers for inductors, and protective casings for various electronic components. Their superior dielectric strength and thermal resistance make them ideal for these applications, ensuring the safety and longevity of electrical equipment.

Mechanical and structural applications

The mechanical strength of laminated tubes makes them valuable in structural applications. They are used as core materials in composite structures, providing lightweight reinforcement in aerospace and automotive industries. In construction, these tubes find use as concrete form tubes, offering a cost-effective and efficient solution for creating cylindrical concrete structures.

Packaging and storage solutions

The durability and moisture resistance of laminated tubes make them excellent choices for packaging and storage applications. They are used to create robust containers for shipping delicate items, storing documents, and preserving artwork. In the textile industry, these tubes serve as sturdy cores for fabric rolls, ensuring the material remains undamaged during transportation and storage.

How To Cooperate With Us

productcate-730-443

Packaging

Regular packing, protected by pallet.
Depending on the requirement of buyers.

Certifications

productcate-1-1

FAQ

Q: What are the main characteristics of phenolic laminated tubes?

A: They have high mechanical strength, good electrical insulation properties, are resistant to heat, chemicals, and moisture to a certain extent.

Q: How strong are phenolic laminated tubes?

A: Their strength depends on factors such as the thickness of the laminate, the type of reinforcement (paper or fabric), etc. Generally, they can withstand moderate mechanical stresses, with tensile strengths ranging from a few hundred to over a thousand pounds per square inch depending on the specific grade.

Q: Are phenolic laminated tubes electrically conductive?

A: No, they are excellent electrical insulators. The phenolic resin and the nature of the lamination process create a material with high resistivity, making it suitable for applications where electrical isolation is required.

Q: What is the typical temperature range that phenolic laminated tubes can withstand?

A: They can typically withstand continuous operating temperatures in the range of - 70°C to +150°C, although some high - performance grades may be able to tolerate slightly higher temperatures for short periods.

Q: How are phenolic laminated tubes manufactured?

A: The manufacturing process involves impregnating paper or fabric with phenolic resin, laying the impregnated layers in a tubular shape, and then applying heat and pressure to cure the resin and bond the layers together.

Q: Can the thickness of phenolic laminated tubes be customized?

A: Yes, manufacturers can produce tubes with different wall thicknesses depending on the requirements of the application. Thicker tubes generally offer higher mechanical strength but may have different electrical and thermal properties.

Q: What quality control measures are used in the production of phenolic laminated tubes?

A: Quality control includes inspection of raw materials (resin, paper, or fabric), monitoring of the impregnation process to ensure proper resin content, and inspection of the finished tubes for dimensional accuracy, absence of voids or delamination, and mechanical and electrical properties testing.

Q: Where are phenolic laminated tubes commonly used?

A: They are commonly used in electrical equipment such as transformers, bushings, and insulators. They are also used in mechanical applications where a combination of strength and insulation is required, like in some industrial machinery parts.

We're professional laminated tubes manufacturers and suppliers in China, specialized in providing high quality customized service. We warmly welcome you to buy cheap laminated tubes for sale here and get free sample from our factory. For price consultation, contact us.

epoxy 21 tube, 3240 epoxy tube, Phenolic insulation tube