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Customized according to the quantity required by your company
Name
Low melting point hardening
Native/Regenerative
Native
Color
white
Packaging Details
bundle
Model Number
2.5D*51MM
Brand Name
Octopus fiber
Certification
66962652
Place of Origin
China
High Whiteness Reinforced Low Melting Polyester Staple Fiber
Only 40% of the dosage is needed for low melting point and enhanced hardness. It can be used for bonding clothing, bags and other scenes without the need for glue.
Product Overview
Our high whiteness reinforced low melting polyester staple fiber is a high-performance upgraded thermal bonding fiber, purpose-built for industries that demand high stiffness, premium white appearance and cost optimization.
Key Specifications
Low melting point hardening
4D*51MM
Specifications can be customized
Technical Advantages
Through innovative polymer modification and precision sheath-core spinning technology, it breaks through the performance limits of ordinary low melting fibers, delivering three core upgrades -- doubled hardness, enhanced whiteness and drastically reduced dosage -- to help manufacturers elevate product quality while significantly cutting raw material costs.
Unlike ordinary low melt fibers that require high addition ratios yet still produce limp, easily deformed finished products, this fiber integrates a high-rigidity reinforced core and a high-activity bonding sheath. The high-strength core provides exceptional structural support after molding, making finished products twice as stiff as standard alternatives, resistant to sagging and deformation, and capable of maintaining stable shaping performance over long-term use.
In terms of appearance quality, the fiber adopts raw-material-level whitening technology with ≥92% ISO whiteness, presenting a pure, bright and uniform white color free of gray or yellow impurities. The high-temperature resistant whitening system does not decompose or yellow during thermal bonding processing, and finished products maintain a bright white premium appearance long-term.
Application Scenarios
Shoe Material Industry: Shoe toe puff & heel stiffener, shoe hard cotton, insole base, shoe lining shaping layer
Carding, needle punching, thermal calendering, air laid, hard cotton thermoforming
Main Application
Shoe hard cotton, garment interlining, bag stiffener, rigid filter felt, automotive interior
Package
25kg Clean Moisture-Proof Woven Bag, Pallet Packed for Global Bulk Export Shipment
Core Selling Advantages
2* Reinforced Hardness, Superior Shape Retention No Sagging
Engineered with a specially formulated high-rigidity polyester core, this fiber delivers twice the bending stiffness and structural support of ordinary low melting fibers at the same addition ratio.
Built with raw-material-level brightening formula and high-purity virgin PET chips, the fiber reaches ≥ 92% ISO whiteness with a pure, uniform, bright white shade.
Only 40% Dosage Required, 60% Raw Material Cost Cut
Thanks to the high-activity bonding sheath and reinforced rigid core, just 40% addition of this fiber delivers the exact same bonding strength and finished hardness as 100% standard low melting fiber.
It adopts precision concentric sheath-core bicomponent technology. The low-melting sheath melts evenly at 110-130°C to form firm, uniform physical fiber-to-fiber bonds.
Universal Industry Specification, Drop-In Compatible With All Lines
The 2.5D medium denier and 51mm standard cut length are the most widely adopted universal specifications in the low melt fiber industry.
Frequently Asked Questions
How much stiffer is this fiber compared with standard low melting fiber?
With a reinforced high-rigidity core layer, it delivers 2* the bending stiffness and shape retention of ordinary low melting fiber at the same addition ratio. Finished products stay firm and do not sag or deform under long-term stress.
What does "only 40% dosage" mean in practical production?
It means only 40% addition of this fiber can achieve the exact same bonding strength and finished hardness as 100% addition of standard low melting fiber. It directly cuts bonding fiber consumption by 60% and significantly reduces production cost.
What is the whiteness value? Will it yellow after heating or long-term use?
ISO whiteness reaches ≥92%, with a pure bright white shade. It uses a high-temperature resistant whitening formula with excellent yellowing resistance, and will not turn yellow or dull during thermal bonding processing or long-term indoor use.
What is the melting point? Is chemical adhesive needed for processing?
The sheath melting point is 110-130°C. No chemical adhesive is required at all. It relies on the melted sheath layer to form firm physical inter-fiber bonds, which is eco-friendly and free of VOC residues.
Is 2.5D *51mm compatible with carding, needle punching and hard cotton molding lines?
Yes, 2.5D*51mm is the industry standard universal specification, fully compatible with all mainstream carding, needle punching, thermal calendering and hard cotton thermoforming equipment, and can be directly put into production.
