UD Preox Fabric is manufactured using continuous pre-oxidized PAN filaments combined with fiberglass yarn in a unidirectional construction. The product range can be developed with different preox tow sizes, including 3K, 6K, 12K, 24K, 25K, 48K and 50K, alongside fiberglass yarn specifications such as 68, 100, 136, 200, 300 and 400 tex. Fabric widths range from 300 to 2,000 mm. The final yarn combination, fabric weight and construction are determined according to production feasibility and customer requirements.

Material

Pre-Oxidized PAN Filament + Fiberglass

Preox Tow Size

3K / 6K / 12K / 24K / 25K / 48K / 50K

Fiberglass Yarn

68 / 100 / 136 / 200 / 300 / 400 tex

Fabric Construction

Unidirectional (UD)

Fabric Weight

200 / 300 / 400 / 500 / 600 g/m²

Fabric Width

300–2000 mm (Customizable)

Packaging

Roll+cardboard box / Customized Packaging

Applications

Automotive Hood Insulation, Engine Compartment and Exhaust Thermal Protection, Welding blanket, fireproof blanket

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Key Properties of UD Preox Fabric

Inherent Flame Resistance

High Temperature Resistance

Dimensional Stability

Chemical Resistance

What Is UD Preox Fabric?

UD Preox Fabric is made with a principal layer of pre-oxidized PAN filaments oriented mainly in one direction and fiberglass yarn incorporated into the textile construction. Pre-oxidized PAN is also known as oxidized PAN or OPAN.

UD OX Fabric, UD Pre-Oxidized PAN Fabric, and Unidirectional Preox Fabric are alternative names associated with this type of material. Unlike conventional woven preox fabric, UD Preox Fabric uses a predominantly one-directional arrangement of its main filament layer. The exact fiberglass orientation, holding method, and fiber ratio depend on the fabric construction.

This structure allows manufacturers to consider the principal fiber direction when preparing cutting patterns, arranging fabric layers, and developing thermal protection components.

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UD Preox Fabric Specification

Model*	Preox Tow Size*	Fiberglass Yarn*	Target Weight (g/m²)*	Estimated Thickness (mm)*	Width (mm)
UD-PX200	3K	100 tex	200	0.5–0.8	300–2000
UD-PX300	6K	136 tex	300	0.7–1.0	300–2000
UD-PX400	12K	200 tex	400	0.9–1.3	300–2000
UD-PX500	12K	200 tex	500	1.1–1.6	300–2000
UD-PX600	12K	300 tex	600	1.3–1.9	300–2000
UD-PX700	24K	300 tex	700	1.5–2.2	300–2000
UD-PX800	24K	400 tex	800	1.7–2.5	300–2000

UD Preox Fabric vs. Woven Preox Fabric

Comparison	UD Preox Fabric	Conventional Woven Preox Fabric
Fiber Arrangement	Main preox fibers predominantly aligned in one direction	Interlaced warp and weft yarns
Construction	Preox filament combined with fiberglass yarn	Conventional woven construction
Principal Fiber Direction	Mainly 0°	Warp and weft directions
Fiber Orientation	Defined principal fiber alignment	Interlaced yarn arrangement
Cutting Considerations	Fiber orientation and edge stability should be checked	Cutting behavior depends on weave and yarn construction
Fabric Weight	Depends on fiber arrangement and density	Depends on yarn specifications and weaving density
Processing	Requires evaluation for cutting, layering and forming	Depends on weave structure and finishing
Selection Factors	Tow size, fiberglass arrangement, weight and width	Yarn count, weave, weight and width

Automotive Applications of UD Preox Fabric

Under-Hood Insulation and Hood Liners

Automotive hood insulation components may require thermal management, acoustic performance, dimensional stability, and reliable attachment.UD Preox Fabric can be evaluated as a textile layer for under-hood insulation assemblies.

Engine Compartment Thermal Protection

Engine compartments contain components exposed to different operating temperatures and localized heat sources.UD Preox Fabric may be considered for thermal protection layers used in selected engine-compartment heat shields.

Exhaust System Heat Shields

Exhaust pipes, tailpipes, and nearby components can generate significant localized heat during vehicle operation. UD Preox Fabric may be evaluated as a fabric layer in exhaust-system thermal protection assemblies for combustion-engine and hybrid vehicles.

Automotive Underbody and Heat Shield Panels

UD Preox Fabric can also be evaluated for automotive underbody heat shields and thermal protection panels located near exhaust systems. These components often require heat protection within limited installation space.

Fire-Protective Blanket

Suitable for applications such as industrial thermal insulation, welding protection, and equipment covering. The fiberglass component provides structural support to the fabric, while the pre-oxidized PAN (polyacrylonitrile) component imparts thermal insulation and protective properties to the material.

Fire Curtains and Fire Barriers

Can be used as a reinforcement layer in multi-layered fire curtains, industrial fire barriers, and fire-resistant partition systems. It is suitable for flexible fire barrier structures in industrial facilities, commercial buildings, workshops, and protective systems for specific equipment.

UD Preox Fabric Related Product

Oxidized PAN Fiber

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Oxidized PAN Fabric

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Pre-oxidized Pan Felt

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Pre-oxidized Pan felt with Aluminum Foil

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How to Choose UD Preox Fabric

Identify the Application:Determine whether UD Preox Fabric will be used for under-hood insulation, engine-compartment protection, exhaust thermal shielding, or another industrial application.

Confirm Thermal Requirements: Specify the expected operating temperature, maximum temperature, exposure duration, and distance from the heat source.

Select the Fabric Construction: For UD Preox Fabric, consider the preox tow size, fiberglass yarn specification, target fabric weight, width, and fiber orientation.

Review Processing Requirements: Identify whether the material will be cut, stitched, laminated, formed, or combined with other insulation layers.

Confirm Samples and Testing: Before bulk production, evaluate UD Preox Fabric samples according to the intended application and required performance standards.

FAQ-About UD Preox Fabric

1. What Is the Difference Between UD Preox Fabric and Regular Woven Preox Fabric?

UD Preox Fabric has pre-oxidized PAN filaments arranged mainly in one direction, while regular woven preox fabric has interlaced warp and weft yarns. These different constructions affect how the fabrics are handled, cut, and processed.

2. What Preox Tow Sizes Are Available for UD Preox Fabric?

Our UD Preox Fabric range can be developed using preox tow sizes such as 3K, 6K, 12K, 24K, 25K, 48K, and 50K.

3. What Fiberglass Yarn Specifications Can Be Used?

UD Preox Fabric can be developed with fiberglass yarn specifications such as 68, 100, 136, 200, 300, and 400 tex.

4. Can UD Preox Fabric Be Laminated With Aluminum Foil or Other Materials?

UD Preox Fabric may be processed with aluminum foil, insulation layers, or selected adhesives to manufacture thermal protection components. The suitable bonding method depends on the materials and processing temperature.

5. Can UD Preox Fabric Be Used for Automotive Hood and Exhaust Heat Shields?

UD Preox Fabric can be considered as a material layer for automotive hood insulation, engine-compartment thermal protection, and exhaust heat-shield assemblies.

6 Can the Fabric Weight, Width, and Construction Be Customized?

Yes. Fabric weight and construction can be discussed according to the required preox tow size, fiberglass yarn, and intended application. Please share your target specifications so we can confirm a suitable production arrangement.

7. What Information Do You Need to Provide a Quotation?

For an accurate quotation of UD Preox Fabric, please provide the required preox tow size, fiberglass yarn specification, fabric weight, usable width, roll length, estimated order quantity, and intended application.