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What is UD Fabric?

2026-01-25

UD fabric is a flexible composite material made of ultra-high strength and high modulus polyethylene fibers as the substrate, which are arranged in a unidirectional parallel manner, bonded with thermoplastic resin in impregnating machine, and laminated using a laminating process. It is also known as unidirectional fabric. Its production process includes continuous fibre laying, micro tension adjustment, automatic cutting and other technologies, which have the characteristics of high tensile strength, lightweight, and corrosion resistance. This material is widely used in the field of bulletproof equipment, such as bulletproof vests, bulletproof helmets, and armor plates, and its bulletproof performance is superior to traditional materials.

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UD Fabric Production Technology:

  • Continuous production line: Using devices such as fibre unwinding frame, fibre comb and so on to achieve fiber sequential arrangement, combined with micro tension adjustment technology, and precise resin impregnating technology,an efficient continuous UD non-woven fabric impregnating production line is formed.
  • Automatic cutting device: Servo motor drive with PLC touch screen operation to ensure cutting accuracy and material integrity.
  • Composite lamination process: Explosionand bullet proof non-woven fabric is made by applying modified epoxy resin solution and combining orthogonal lamination technology.
  • Other accessories related: UD fabric edge Cutting Machine and UD inspection machine are for the appearance and quality control.

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UD Fabric Features:

Mechanical properties: The fibers are arranged without buckling, with a tensile strength and modulus retention rate of over 90%, and high energy propagation efficiency.

Environmental tolerance: It has the characteristics of UV protection, acid and alkali resistance, moisture resistance, etc., and is suitable for complex environments.

Protective performance: The multi-layer stacked structure can effectively resist bullet impact and tool cutting, and the bulletproof effect is better than traditional polyethylene fiber materials

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UD Fabric Application:

Military protection: mainly used for the manufacturing of bulletproof vest cores, bulletproof helmets, and armor plates, meeting the requirements of lightweight and high protection.

Special equipment: After being compounded with HDPE film, it can produce stab proof vests, bulletproof armor, etc., achieving "replacing steel with plastic".

Extended use: It also has potential applications in military equipment, special protective equipment, and other fields.