TPE Overmolding PA66 Special Material

Core Advantages

•Molecular-level bonding, firm and non-detaching: Utilizing SEBS graft modification technology, polar functional groups are introduced into the formulation to form "molecular bridges" with the amide groups of the PA66 substrate, achieving tight fusion at the molecular level. High bonding strength, peel strength ≥3.5N/mm, no additional adhesive required. Firm overmolding can be achieved through secondary injection molding, capable of long-term resistance to vibration, impact, pulling, and alternating high and low temperatures in complex working conditions—no delamination, no cracking. This thoroughly addresses the industry pain point of poor adhesion between traditional TPE materials and PA66 due to significant polarity differences. Compatible with PA66 and PA66+GF (glass fiber reinforced) substrates, offering broader adaptability to meet the structural stability requirements of various overmolded products.

•Soft and anti-slip, comfortable touch: Specifically optimized soft formulation, hardness can be flexibly customized (Shore 20~80A). Soft and resilient texture, fine and smooth touch, non-sticky and non-tacky. Effectively enhances product grip comfort while providing good anti-slip performance, reducing the risk of slipping during handling. Also possesses moderate cushioning and shock absorption properties to mitigate vibration and impact during use. Suitable for products requiring frequent handling such as handles and grips, balancing comfort and practicality, meeting the tactile demands of high-end products.

•Weather and wear resistant, stable performance: Added overmolding-specific weather and wear-resistant additives, combined with the excellent performance of the modified substrate. Temperature resistance range covers -40℃ to 120℃—no softening or stickiness in high-temperature environments, no embrittlement or cracking in low-temperature environments. Suitable for alternating high and low-temperature scenarios such as outdoors and automotive engine compartments. Outstanding wear resistance, dense surface not easily worn, no fuzzing, no fading. Also possesses good chemical resistance, tolerant to oils, solvents, common cleaning agents, etc. No aging or degradation with long-term contact, effectively resisting various daily wear and tear, extending the service life of overmolded products, suitable for complex usage environments.

•Environmentally friendly, non-toxic, compliant, and controllable: Adopts an overmolding-specific environmentally friendly full formulation system, selecting high-purity modified substrates and non-irritating additives. Halogen-free, non-toxic, odorless, no harmful leaching. Strict control of harmful components such as Bisphenol A, phthalates, heavy metals, plasticizers. Complies with domestic and international authoritative environmental standards including RoHS 2.0, REACH, FDA, EN71, PAHS. Undergoes strict third-party testing, compliant and traceable. Suitable for scenarios with high environmental safety requirements such as automotive interiors, children's products, food-contact accessories, eliminating safety hazards, aligning with green production concepts.

•Easy processing, high molding efficiency: Excellent and stable melt fluidity, uniform plasticization, no melt fracture. Can be rapidly produced via secondary injection molding, overmolding, etc. Smooth molding without material accumulation or flash, product surface flat and smooth, no burrs or bubbles. Low shrinkage rate (0.8~1.1%), precise dimensions. Suitable for complex-shaped PA66 overmolded products, no need for subsequent grinding or trimming. Sprue material recyclable, reducing production costs. Also compatible with existing PA66 injection molding equipment, production possible without mold modification, further reducing manufacturer equipment investment, improving production efficiency, suitable for large-scale production needs.

•Strong adaptability, customizable requirements: Can flexibly adjust hardness, bonding strength, temperature resistance, color, and surface texture based on PA66 substrate type (pure PA66, PA66+GF) and product application. Customizable in various styles such as transparent, translucent, black, colored, etc. Uniform coloring, good stability, using environmentally friendly color masterbatch, not easily fading, non-migrating, no harmful leaching. Also customizable for specialized formulations such as high wear resistance, high bonding strength, high and low-temperature resistance, etc. Suitable for overmolding needs across different industries and scenarios. Can replace traditional rubber and ordinary TPE materials, addressing their pain points of poor adhesion, easy aging, and cumbersome processing. Provides greater freedom for product design, suitable for multi-field innovation needs.

•Mechanical balance, balancing rigidity and elasticity: Perfectly integrates the high strength and high rigidity of the PA66 substrate with the soft elasticity of TPE material. Leverages the PA66 substrate for structural support of the product, meeting core needs such as load-bearing and stress resistance, while optimizing user experience through the TPE overmolding layer, addressing the issue of hard feel with pure PA66 material. Achieves the dual goals of "structural load-bearing" and "experience optimization." Suitable for overmolded products requiring both structural strength and usage comfort, such as industrial tool handles, automotive accessories, etc.