At Dongguan Ludi Composite Materials Co., Ltd., quality is the cornerstone of our manufacturing process. We operate under a rigorous Quality Assurance (QA) and Quality Control (QC) framework at every stage of production. From raw material inspection to final packaging, we ensure that every carbon-fiber racket and paddle leaving our factory meets strict international standards and client specifications.

We only use premium, high-grade raw materials sourced from trusted global suppliers:

• Carbon Fiber Integrity: Ultrasonic and visual inspection of Toray T300, T700, High-Modulus Graphite, and 3K/12K/18K carbon fabrics to ensure uniform density, weave purity, and zero resin defects.
• Core Material Testing: Rigorous compression and resilience testing on Polypropylene (PP) honeycomb cores and high-density EVA memory foam.
• Resin & Adhesive Quality: Precise ratio verification for epoxy resins to ensure optimal bonding strength and high temperature/UV resistance.

Every step during the manufacturing process is continuously monitored to eliminate internal defects:

• Precision Lay-Up & Molding: Real-time temperature and pressure monitoring during compression, vacuum bagging, and autoclave molding to ensure zero air pockets or structural delamination.
• Thermoforming & Frame Molding: Structural alignment checks for thermoformed edge-walls on pickleball paddles and monocoque frame geometry on rackets.
• CNC Precision Routing: 3D coordinate checking for CNC hole-drilling patterns (beach tennis), handle dimensions, and frame edge beveling.

Before moving to custom branding and surface finishing, 100% of finished blanks undergo multi-point physical testing:

• Weight & Balance Tolerance: Strict weight matching (within ±2.0g) and static balance point measurements to guarantee batch-to-batch consistency.
• Flexibility & Frame Stiffness (RA Rating): Deflection testing to ensure precise shaft flex (badminton/squash) and head stiffness (tennis/pickleball).
• Impact & Fatigue Resistance: Drop-impact and repetitive ball-striking stress tests to ensure structural longevity and frame durability.
• String Tension Load Testing: Frame deformation testing up to 30+ lbs tension capacity for badminton and tennis frames.

Our surface quality control ensures a flawless aesthetic finish for private-label brands:

• Coating & Finish Check: 100% manual inspection under polarized lighting for pinholes, dust inclusions, or uneven gloss/matte varnish.
• Grit & Friction Surface Test: Surface roughness testing (tactile grit/friction) on pickleball paddle faces to comply with USAPA spin regulations.
• Graphic & Logo Print Adhesion: Cross-hatch tape adhesion tests on custom screen printing, decals, and UV paint finishes.

• Grip & Accessory Assembly: Pull-test on handle grips, end caps, and edge-guard trims to prevent loosening during intense gameplay.
• Packaging & Drop Test: Master carton drop testing and protective box inspection to ensure safe, damage-free international transport.
• AQL Standard Sampling: Final random sampling conducted according to AQL 1.5/4.0 standards prior to container loading and dispatch.