Pre-Oxygenated Silk Water Stitch Nonwoven Fabrics

1. Core advantages of pre-oxidized filament nonwoven fabric: Breakthrough in special fiber performance

Pre-oxidized nonwoven fabric is based on "carbon fiber precursor pre-oxidized fibres", combining the characteristics of spunlace without adhesive reinforcement. It achieves cross-dimensional superiority over conventional nonwoven fabrics in extreme environmental adaptability, chemical stability, and structural functionality. The core advantages are reflected in five dimensions:

1. Ultra-high heat resistance and flame retardancy, extreme environment safety barrier

Excellent heat resistance: The pre-oxidized fibers undergo special oxidation treatment to form part of the ringed structure, which can work stably at 220°C for a long time. The strength retention rate is 100% when used continuously at 240°C, begins to slowly decompose at 370°C, and starts to carbonize but does not melt at 400°C, completely solving the problems of high-temperature melting of chemical fiber nonwoven fabrics and burning of cotton nonwoven fabrics.

Self-extinguishing flame retardancy without dripping: It has natural self-extinguishing properties. When exposed to fire, it only carbonizes and does not burn. During the combustion process, there is no shrinkage or melting drop phenomenon. The flame extinguishes immediately after the flame is removed, with a flame retardancy reaching the GB 8624-2012 A-level standard, effectively blocking the spread of flames and ensuring the safety of personnel and equipment.

2. Full-dimensional chemical corrosion resistance, strong adaptability to harsh media

Broad-spectrum corrosion resistance without dead corners: It has excellent tolerance to strong acids (such as 98% sulfuric acid), strong bases (such as 40% sodium hydroxide solution), and various organic solvents (ethanol, acetone, engine oil, etc.). The fracture strength loss rate after soaking for 72 hours is ≤5%, much better than polyester nonwoven fabrics (loss rate usually >30%).

Stable environmental tolerance: In high humidity (relative humidity 95%), high salt spray (coastal environment), and industrial pollution conditions, there is no mold, corrosion, or performance degradation. The service life is 3-5 times that of ordinary chemical fiber nonwoven fabrics, suitable for long-term outdoor and industrial scenarios.

3. Balanced structural mechanics, stable performance in both dry and wet states

Excellent spunlace strength: Using 4 low-pressure precise spunlace processes, the fiber spunlace density is 25% higher than that of needle-punch processes. The longitudinal fracture strength is ≥20N/5cm, the transverse fracture strength is ≥15N/5cm, and the wet-state strength retention rate is above 95%. There is no shedding or damage after repeated folding and friction.

Outstanding dimensional stability: After high-temperature pre-shrinking and setting treatment, the dimensional deviation is ≤1% within the temperature range of -40°C to 200°C, much lower than that of ordinary nonwoven fabrics (usually 3%-5%), which can maintain the integrity of the shape for a long time and be suitable for scenarios with high precision requirements such as precision equipment sealing and special protective clothing.

4. Strong functional compatibility, multi-scenario customization and adaptation

Wide process plasticity: Supports various texture customizations such as plain weave, dense mesh pattern, and gradient hole structure. The coverage per square meter is 50-300g, and it can be processed through cutting, composite, coating, etc., with a processing loss rate of <1.5%, suitable for diverse needs ranging from flexible protection to rigid sealing. Functional Overlap without Conflict: On the basis of retaining the original performance, various functional modules such as fireproof coating, conductive layer, and adsorption layer can be combined. For instance, after adding a graphite layer, electromagnetic shielding can be achieved; by adding activated carbon particles, exhaust gas adsorption can be enhanced, and the core performance of high-temperature resistance and flame retardancy will not be affected.

5. Environmental protection and safety in balance, controllable throughout the life cycle

Production process clean: Adopting a fully enclosed and clean production line, the needling process only consumes water and electricity. Through a water circulation filtration system, the water reuse rate reaches 90%, with no emissions of waste gas or waste residue, and it complies with environmental protection production standards.

Disposal of waste safe: After disposal, it can be converted into inorganic carbon slag through high-temperature carbonization, without releasing toxic gases, or be recycled as carbon fiber raw materials to avoid the environmental pollution problems caused by traditional flame-retardant non-woven fabrics containing halogen flame retardants.

II. Core features of pre-oxidized spunlace non-woven fabric: Differentiated advantages directly addressing scenario pain points

Pre-oxidized spunlace non-woven fabric focuses on "extreme environment adaptability" as its core, combined with the structural advantages of the spunlace process, forming three differentiated features that precisely solve the core pain points of special fields:

1. High temperature resistance + No dripping: A breakthrough in the essence of fireproof protection

For scenarios such as firefighting and metallurgy where there are "high-temperature molten substances scalding" and "fast flame spread" fatal risks, pre-oxidized filament needling non-woven fabric completely avoids the safety hazard of melting and dripping of chemical fiber non-woven fabrics. For example, the fire escape blanket, when exposed to fire, only carbonizes to form a heat-insulating layer, without the risk of dripping and scalding, and can block 1000°C flames within 30 seconds, providing critical time for escape, becoming the core material of high-end fire protection equipment.

2. Corrosion resistance + High strength: A durable solution for industrial scenarios

Compared with ordinary anti-corrosion non-woven fabrics that "are resistant to corrosion but have low strength" or "have high strength but are not resistant to corrosion", pre-oxidized filament needling non-woven fabric achieves a dual breakthrough of "corrosion resistance and strength". For example, the anti-corrosion filter cloth in the chemical workshop, it can withstand strong acid and alkali medium corrosion and withstand the high-pressure impact during the filtration process, with a lifespan more than twice that of traditional filters, significantly reducing replacement costs.

3. Structural stability + Function combination: Customized adaptation for precise scenarios

In fields such as aerospace and precision manufacturing with strict requirements for material performance, pre-oxidized spunlace non-woven fabric can meet special needs through structural and functional customization. For example, the satellite equipment sealing pad, it not only has a wide temperature range of -40°C to 180°C dimensional stability, but also combines a conductive layer to achieve static discharge, while maintaining lightweight characteristics, perfectly adapting to the extreme environment of space.

III. Main application fields of pre-oxidized spunlace non-woven fabric: Essential materials for special scenarios

Relying on the above advantages and characteristics, pre-oxidized spunlace non-woven fabric has become an "indispensable material" in four core fields of fire protection, industrial manufacturing, environmental purification, and aerospace, promoting the safety upgrade and performance breakthrough of related industries:

1. Fire protection field: The core barrier for life safety

Personal protective equipment: Outer layer protective fabric for fire protection suits, inner lining of heat-resistant gloves —— 220°C long-term temperature resistance, 1000°C short-term heat insulation, no risk of dripping and scalding, while having certain breathability (trans渗透率≥800g/(m²・24h))， reducing the heat sensation of firefighters during high-temperature operations.

Emergency protective supplies： Fireproof escape blankets， emergency flame-retardant tents —— Expand quickly， flame-blocking time ≥ 10 minutes， can cover the human body or wrap valuable equipment， weight only 60% of traditional fireproof blankets， combining portability and protection.

Building fireproof materials： Steel structure fireproof coating fabric， cable fireproof sealing layer —— Good wrapping performance， can closely adhere to irregular structures， when exposed to fire， it forms a carbonized heat-insulating layer， delaying the softening time of the steel structure to over 120 minutes， far exceeding the national standard of 60 minutes.

2. Industrial Manufacturing Field: Dual Assurance for Equipment and Environment

Chemical Corrosion Prevention Application: Acid and Alkali Liquid Filter Cloth, Storage Tank Anti-corrosion Inner Liner - Resistant to strong acid and alkali corrosion, with a filtration accuracy of 5μm, capable of retaining solid particles in chemical waste liquids, the inner liner has a service life of over 18 months, reducing the risk of equipment corrosion and leakage.

Metallurgical High-Temperature Resistance Application: Steel Water Casting Protection Cloth, Blast Furnace Temperature Monitoring Port Sealing Gasket - Resistant to temperatures above 1500℃, blocking the splashing of molten steel and causing burns, the sealing gasket maintains a sealing performance of 98% at 200℃, avoiding the leakage of high-temperature gases.

Mechanical Sealing Application: Engine High-Temperature Sealing Gasket, Precision Instrument Dustproof Cover - Dimensionally stable within -30℃ to 180℃ range, resistant to corrosion by engine oil and hydraulic oil, with superior sealing performance compared to traditional rubber gaskets, and lighter weight, without aging or cracking issues.

3. Environmental Purification Field: Efficient Carriers for Pollution Control

Industrial Waste Gas Treatment: High-Temperature Filter Cotton， Harmful Gas Adsorption Cloth - Capable of filtering smoke particles at 200℃， with a filtration efficiency of ≥95%， after being combined with activated carbon， it can adsorb up to 85% of formaldehyde and VOCs， suitable for high-temperature waste gas scenarios in metallurgy and painting.

Solid Waste Treatment Protection： Hazardous Waste Packaging Cloth， Incinerator Filter Bag - Strong corrosion resistance， capable of bearing strong acid and alkali hazardous waste， the incinerator filter bag can retain incineration dust at 220℃， reducing harmful gas emissions.

4. Aerospace and Special Fields：Performance Support in Extreme Environments

Aerospace Companionship： Satellite Equipment Heat Insulation Layer， Rocket Engine Sealing Gasket - Dimensionally stable in a wide temperature range， without contraction from -40℃ to 200℃， capable of blocking the impact of extreme temperature differences in space on equipment， the sealing gasket is resistant to high pressure and lightweight， meeting the lightweight requirements of spacecraft.

Military Defense Application： Military Flame Retardant Tent Cloth， Anti-Chemical Suit Outer Layer Material - Equipped with multiple performance features such as flame retardancy， acid and alkali resistance， and radiation resistance， the tent cloth does not spread when exposed to fire， the anti-chemical suit can resist the penetration of chemical warfare agents such as mustard gas， ensuring the safety of combat personnel.

Electronic Industry Application： High-Temperature Welding Protection Cloth， Electronic Component Anti-static Packaging - Capable of withstanding 300℃ welding temperatures， avoiding the scorching of electronic components by welding slag， after being combined with conductive fibers， the surface resistance is ≤10⁶Ω， effectively releasing static electricity， preventing component breakdown and damage.

About Yongdeli: A professional manufacturer of pre-oxygenated spunlace non-woven fabric

Changshu Yongdeli Spunlace Non-Woven Fabric Co., Ltd. has been dedicated to the production of pre-oxygenated staple spunlace non-woven fabric for over 20 years. The company's annual production capacity reaches 5,000 tons and it can provide customized services. If you need samples or customized solutions, please feel free to contact us.