Seam-edge fire-resistant cotton is used to prevent sparks from splashing and piercing during copper pipe welding.

Seamed preoxidized fiber fire-retardant cotton is a fire-retardant cotton felt made from preoxidized fiber material and reinforced at the edges through a sewing process.

Pre-oxidized silk fibers have a high limiting oxygen index and are flame-retardant fibers that do not burn when exposed to fire, nor do they melt or drip. Pre-oxidized silk fire-resistant cotton is processed into felt using a needle-punching technique, with thicknesses ranging from 1 to 15 mm and basis weights between 80 and 2,000 g/m². It boasts excellent formability, is soft and lightweight yet non-abrasive to the touch, and easily conforms to irregular surfaces. Additionally, it offers outstanding thermal insulation properties and is commonly used for wrapping and filling applications. With a certain level of mechanical strength, it can be directly cut and used as needed.

Based on pre-oxidized spunbond nonwoven fabric, a post-processing technique involving edge sealing is applied to the fire-retardant cotton. This edge-sealing process reinforces the edges, preventing fiber shedding and loosening during use, thereby enhancing durability and overall structural integrity. It also simplifies installation, making it easy to secure, hang, or combine with other materials via the sewn edges.

Application fields of seam-preoxidized silk fire-retardant cotton:

1. Industry and Energy Sector

Welding and Metalworking: Welding spark-arresting blankets or protective curtains are made using seam-bound, pre-oxidized fiber fire-retardant cotton. The seam-bound construction not only reinforces the edges, preventing sparks from piercing and tearing the material, but also allows for the sewing of hanging loops or Velcro straps at the corners, making it easy to quickly hang and remove the curtain, thereby protecting surrounding equipment and personnel safety.

Petrochemicals and Power: Removable thermal insulation covers designed for high-temperature pipelines and reactors. The pre-oxidized fiber itself boasts excellent fire-resistant and thermal-insulating properties, effectively preventing heat loss and safeguarding personnel from burns. Meanwhile, the robust stitched edges ensure the overall durability of the insulation cover during frequent removal and installation.

New-energy battery: In lithium-ion battery packs, it can serve as a thermal and fire-resistant layer between individual cells. The edge-seaming treatment ensures that the material edges are neatly finished, preventing fiber debris from entering precision systems while also facilitating secure installation on the production line.

2. Security Protection Field

Firefighting and Rescue: Used to make professional fire blankets or escape blankets. The blankets, with hemmed edges, are sturdy and resistant to tearing under tension. Additionally, handle pockets can be sewn onto the edges, allowing for quick grabbing and use in emergency situations.

Specialty applications: In high-temperature industries such as steel and glass, these can be used as linings, aprons, or sleeves for high-temperature work gloves. The sewn edges provide precise shaping and enhance the overall resistance to mechanical abrasion.

Laboratory and High-Risk Areas: Used as fire-resistant pads for laboratory benches and as linings for small cabinets used to store flammable materials. Pads with sewn edges are neater and more aesthetically pleasing, and they are easier to clean and maintain.

3. Architecture and Transportation field

Fire-resistant sealing for building construction: Used to fill gaps left after cable trays and pipes pass through floor slabs or walls (fire-sealing). Manufactured in strip or block form with sealed edges, these materials can be tightly inserted and secured like “seals,” effectively preventing flames and toxic smoke from spreading through the gaps in the event of a fire.

Interior trim for transportation vehicles: Used as a fire-retardant and sound-insulating layer in the sidewalls and ceiling linings of high-speed trains, subways, ships, and high-end motorhomes. The stitched-edge process facilitates its integration with interior upholstery fabrics, creating a seamless assembly that combines aesthetic appeal, sound insulation, and superior fire resistance.

High-end home appliances—such as those installed around home fireplaces or built-in ovens—serve as concealed thermal insulation layers. The edges are sewn to ensure precise installation and secure positioning within the frame, much like a “padding” material.

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