Import 300d Polyester Sewing Thread For Mattress — Buy in Bulk from Supplier in China

The 300d polyester sewing thread for mattress from Changshu Longli Thread Co. Ltd. is a high-tenacity continuous filament polyester thread engineered for industrial mattress and bedding manufacture. The thread has a nominal diameter of 0.19 mm, a gross weight of 500 g per cone, and a net thread weight of 470 g, yielding an approximate length of 12,800 metres per package. This specification is optimised for flanging machine operations that sew mattress edges, though the supplier also cross-sells 210d/3, 20s/2, 40s/3, and 150d/3 alternatives for different stitching stations.

Continuous filament polyester at 300 denier provides high tensile strength with low elongation, resisting the cyclic tension variations encountered in mattress edge sewing where stitch integrity affects product lifespan. The 0.19 mm diameter sits within the typical range for mattress flanging threads, balancing needle penetration resistance with sufficient bulk to cover seam edges aesthetically. The 500 g gross / 470 g net weight indicates standard cardboard or plastic cone packaging of approximately 30 g tare, a common format for high-speed quilting and flanging equipment. The thread lacks stated lubrication or finish specifications; standard practice in bedding manufacture applies a silicone or paraffin finish to reduce needle heat and thread breakage at high stitching speeds.

Primary users are mattress OEMs, bedding subcontractors, and upholstery workshops operating multi-needle flanging and quilting machines. The 12,800 m length per cone suits semi-automatic and automatic thread tension systems that require infrequent changeovers. Buyers should confirm tensile strength in Newtons or gram-force, elongation at break percentage, and whether the thread is twisted (300d/1, 300d/2, or 300d/3) before specifying for production runs. The supplier also recommends alternative counts for side decoration stitching, indicating consultative sales capability for full mattress thread assortment planning.

Changshu Longli Thread Co. Ltd. is located at No. 18 Xiaokang Road, Yushan Town, Changshu City, Jiangsu Province, China, with postal code 111111. The company holds a harbor trust tier on the marketplace, with a response rate showing as 0.00 percent and zero average response hours. This profile status may reflect a new listing or incomplete engagement metrics rather than operational inactivity. No factory size, year of establishment, annual turnover, or workforce numbers are disclosed in the available data.

The supplier specialises in industrial sewing threads for mattress manufacture, offering a narrow but technically specific product range including 300d polyester for flanging and multiple counts for quilting and decorative stitching. The technical product description, including precise diameter, weight, and length specifications, suggests direct factory or dedicated trading operation with technical knowledge of bedding machinery requirements. Buyers should request business licence verification, factory audit access, and quality management documentation directly, as no ISO, OEKO-TEX, or industry-specific certifications are named in the profile. The Changshu location places the supplier within the Yangtze River Delta textile belt, with established supply chains for polyester filament and dyeing facilities.