Bico Polyester Thermal Bonding Staple Fiber 4D 6mm
Bi-component polyester staple fibers with a low-melt copolymer sheath surrounding a high-melt core, cut to 6mm length at 4 denier. Designed specifically for thermal bonding applications where the sheath melts at lower temperatures to fuse fibers without adhesives. Classified under HTS 5503.20.0015 due to their bi-component structure optimized for nonwoven bonding processes.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If not specifically designed for thermal bonding
Standard polyester staple fibers without specialized low-melt sheath/core for bonding fall under the general polyester provision.
If carded, combed, or processed for spinning
Any processing beyond raw staple form moves fibers to Chapter 55 heading 5504 for prepared synthetic fibers.
If imported as continuous filament rather than staple
Bi-component bonding functionality in filament yarn form classifies under synthetic filament heading 5402, not staple fibers.
Not sure which classification is right?
Our AI classifier can analyze your specific product and recommend the correct HTS code with confidence.
Import Tips & Compliance
• Verify bi-component structure via manufacturer specs showing distinct sheath/core melt points to confirm HTS 5503.20.0015 classification
• Include technical datasheets documenting lower sheath melt temperature (typically 110-130°C vs core >150°C) in import documentation
• Avoid misclassification as standard polyester staple by highlighting thermal bonding end-use; common pitfall is grouping with 5503.20.0020
Related Products under HTS 5503.20.00.15
Thermal Bondable Polyester Bico Staple Fiber 15D 38mm
Co-PET/PET bi-component staple fibers with 15 denier thickness and 38mm length, featuring outer sheath that melts at ~120°C for fiber-to-fiber fusion. Used in automotive insulation felts, filtration media, and durable nonwovens requiring point bonding strength. Fits HTS 5503.20.0015 as unprocessed synthetic staple explicitly for thermal bonding applications.
ES Sheath-Core Bico Polyester Fiber 2D 32mm
Extensible sheath (ES) bi-component polyester staple fibers, 2 denier ultrafine, 32mm length, with copolyester sheath melting lower than PET core for superior bonding. Common in flushable wipes, medical nonwovens, and high-loft battings via calendering or air-through bonding. HTS 5503.20.0015 covers these precise thermal bonding fiber specifications.
Concentric Bico Thermal Fusion Polyester Staple 6D 65mm
Concentric sheath-core bi-component polyester fibers, 6 denier, 65mm staple length, engineered for uniform thermal fusion in needlepunched geotextiles and carpet underlays. The outer copolymer melts selectively to create strong interfiber bonds during hot air or calender bonding. Precisely matches HTS 5503.20.0015 definition for bonding-purpose bi-component synthetics.
Side-by-Side Bico Polyester Bonding Fiber 4.5D 40mm
Side-by-side (SxS) bi-component polyester staple fibers with 4.5 denier and 40mm cut length, providing latent crimp activation plus thermal bonding capability via differential melting sheath. Used in stretch nonwovens for apparel interlinings and compressible battings. HTS 5503.20.0015 encompasses all low-melt sheath configurations for fiber bonding.
Eccentric Sheath-Core Bico Fiber 1.5D 25mm
Eccentric sheath-core bi-component polyester microfibers at 1.5 denier fineness, 25mm staple length for ultra-fine thermal bonded nonwovens in beauty masks and filtration. Asymmetric sheath distribution enhances bond points during through-air bonding. Meets exact HTS 5503.20.0015 criteria for bonding-optimized synthetic staple.
Low-Melt Sheath-Core Polyester Bico Fiber 3D 51mm
Polyester bi-component staple fibers featuring sheath-core morphology where the outer copolymer sheath melts below the polyester core, 3 denier fineness and 51mm staple length. Primarily used in airlaid nonwovens for diaper cores and hygiene products via thermal point bonding. HTS 5503.20.0015 applies to these unprocessed fibers engineered for interfiber adhesion.