3M™ Dual Lock™ Reclosable Fastener DL400/5428, 826916001, 32033, Black, PSA, Stem Density 400, 20 mm x 10 mm, Roll

The 3M™ Dual Lock™ Reclosable Fastener DL400/5428 incorporates advanced adhesive technology through the integration of 3M™ Acrylic Foam Tape 5428. This specialized tape features a transparent construction with a thickness of 5 mils and is backed by either a polyethylene or siliconized paper liner. The acrylic-based adhesive formulation delivers robust initial and sustained adhesion across diverse paint systems and surface types, while demonstrating exceptional resistance to shear forces, temperature fluctuations, and chemical exposure.

This innovative reclosable fastening system utilizes uniquely engineered mushroom-shaped polyolefin stems that function through a snap-lock mechanism. When two fastener pieces are pressed together firmly, the flexible stems compress and allow the mushroom-shaped heads to pass by one another. Once the mating pieces move beyond each other, the stems automatically return to their original configuration, causing the mushroom heads to interlock securely. This design provides substantial tensile strength while maintaining the ability to be separated through simple cleaving or peeling motions without requiring any specialized equipment or tools. The straightforward alignment and realignment capabilities make these fasteners particularly valuable for early-stage component assembly, potentially reducing both parts inventory and overall manufacturing timeframes.

The 3M™ Dual Lock™ Reclosable Fastener system offers flexibility through multiple stem density configurations that can be combined to suit specific application requirements. Three distinct density options are available, measured in stems per square inch across a 25-millimeter area: Type 170, Type 250, and Type 400. The DL400/5428 variant features the highest density at 400 stems per square inch, delivering maximum holding force. This highest-density option can be successfully paired with either Type 170 or Type 250 fasteners. However, combining two Type 400 fasteners should be avoided, as the resulting engagement would be excessive and could compromise component integrity during separation.

3M™ Dual Lock™ Reclosable Fasteners serve as effective alternatives to traditional mechanical fastening methods across numerous assembly and attachment scenarios where ease of service access or repeated opening is beneficial. These fasteners excel at securing both rigid and semi-rigid surfaces throughout automotive applications. Common uses include:

3M™ has developed the Dual Lock™ Reclosable Fastener through the strategic combination of advanced physics principles and materials science expertise, addressing the automotive industry's need for fastening solutions that simultaneously deliver durable attachment and straightforward separation. The DL400/5428 demonstrates exceptional performance capabilities even when subjected to high-moisture environments and extensive temperature ranges. For applications requiring slide-in components and multiple closure cycles, this fastening system provides enduring reliability and consistent performance, exemplifying how 3M innovations continue to enhance automotive manufacturing efficiency and operational effectiveness.