Card clothing (Nonwoven Carding Wire) is a system of fine steel wire teeth wound around the rollers of a carding machine in a needle-punch nonwoven fabric production line. These rollers work together to open the fibers, align them into parallel formation, and build an even fiber web — the foundation that feeds into the needle-punching stage.
The role of card clothing in a needle-punch line
- Opens and loosens the raw fiber.
- Aligns fibers in parallel so they form a web easily.
- Distributes fiber evenly across the cylinder surface.
- Removes impurities and defective fibers.
- Forms a continuous, stable fiber web.
Construction and layout
Card clothing is made from hardened, wear-resistant alloy steel wire with evenly spaced, sharp teeth. It’s wound around several different rollers inside the carding machine, each one handling a specific job:
- Feeder roller: feeds fiber from the feed unit into the carding machine.
- Cleaner roller: removes impurities and defective fibers.
- Licker-in roller: opens up and disperses large fiber tufts.
- Breast cylinder: gives the fiber an initial carding pass before the main cylinder.
- Main cylinder: the main drum — aligns fibers in parallel and spreads them out.
- Worker & Stripper rollers: work together to thin and even out the fiber web.
- Transfer roller: moves fiber between rollers.
- Condenser roller: gathers and stabilizes the fiber layer.
- Doffer roller: strips the fiber web off the main cylinder.
- Take-off roller: carries the web out of the carding machine.
- Random roller: distributes fiber randomly to boost uniformity.
Key technical specifications of card clothing
- Working Angle: determines how well the wire grips, holds, and cards the fiber. A small angle gives gentler carding with less fiber breakage. A large angle gives stronger fiber-opening action, suited to coarse fiber.
- Rib Thickness: the thickness of the wire’s base. Thicker wire is more durable and suited to coarse fiber. Thinner wire is finer and suited to delicate fiber.
- Total Height: measured from the base to the tip of the wire. It affects how deep the wire penetrates the fiber and how durable it is during carding.
- Pitch: the spacing between consecutive wire teeth. A small pitch gives a denser wire population and a finer web. A large pitch gives a sparser density, suited to coarse fiber.
- Point density (PPSI – Points Per Square Inch): the number of wire points per square inch. High PPSI gives thorough carding and a finer web. Low PPSI suits longer fiber and a thicker web.
- Surface Finish: polishing, chrome plating, or other special anti-corrosion treatment. It affects service life and carding performance.
Classifying nonwoven carding wire
- By tooth density:
- Sparse: suited to coarse, long fiber.
- Dense: suited to fine fiber that needs a smooth web.
- By tooth angle:
- Small angle: limits fiber breakage, for fine fiber.
- Large angle: speeds up fiber opening, for coarse fiber.
- By position of use:
- Carding wire for the feeder, licker-in, and breast cylinder.
- Carding wire for the main cylinder, worker, and stripper.
- Carding wire for the doffer, transfer, condenser, take-off, and random rollers.
Applications in needle-punch nonwoven production
- Builds an even fiber web before the cross lapper.
- Improves the uniformity of the finished fabric.
- Directly determines the strength and surface quality of the nonwoven fabric.
Selection and maintenance notes
- Choose carding wire based on the raw material (PET, PP, viscose, recycled fiber).
- Maintain and clean it regularly to prevent fiber buildup.
- Replace it once the teeth become worn or bent.
- Keep every roller calibrated together to maintain a stable web.
Conclusion
Card clothing is a critical wear part in a needle-punch line. Each roller has its own carding-wire system with a distinct role, but all of them work toward the same goal: an even fiber web. Beyond choosing the right type of carding wire, manufacturers need to pay attention to technical specs like Working Angle, Rib Thickness, Total Height, Pitch, PPSI, and Surface Finish. Managing carding wire well means better fabric quality and better line performance.