SPIFR #8 Metal Fire Retardant Close End (C/E) Zipper

The #8 Metal Fire Retardant Close End Zipper is engineered for high-temperature working conditions where components must remain stable, non-melting, and fully functional. Reinforced with a heavy-duty metal chain and FR-treated tape, this zipper provides secure performance for industrial protective clothing, welding wear, firefighting outer layers, and petrochemical uniforms.

Verified Flame-Resistance Performance

Independent testing demonstrates the zipper’s stability under direct heat exposure.
At 260°C for 5 minutes:

• Ignition: No ignition observed

• Melting & Dripping: None

• Separation: None

• Functionality: All samples remained fully functional

These results confirm the zipper’s ability to retain structural integrity and operability during thermal stress—critical for PPE and FR garment systems.

Vertical Flame Test Results (As Received

Condition)

The zipper tape shows excellent flame behavior with zero after-flame time and very short carbonized areas, indicating strong inherent FR performance.

Test outcomes (warp direction):

• After-flame time: 0 seconds across all specimens

• Char length: 2–4 mm

• Melting/Dripping: None

• Average char length: 3 mm

All results fall well below typical acceptance thresholds (char length ≤ 100 mm, after-flame ≤ 2 s), demonstrating outstanding flame resistance.

Heavy-Duty #8 Metal Chain Stability

The #8 gauge metal chain provides greater tensile strength and durability compared to medium-weight zippers.
Benefits include:

• High resistance to deformation

• Smooth slider travel even after heat exposure

• Strong abrasion and impact resistance

• Long cycle life for industrial workwear

This makes the zipper suitable for both high-performance FR garments and equipment that require durable close-end fasteners.

Close-End Construction for Secure Applications

The reinforced close-end bottom stop ensures stability for garments and gear that require a fixed anchor point:

• FR work trousers

• Welding jackets

• Utility uniforms

• Protective pockets and tool pouches

• Industrial bags, cases, and equipment covers

  
  

Performance Advantages (Based on Integrated

Test Data)

• No ignition under 260°C exposure

• No melting or dripping

• No structural separation

• Maintains full functionality after heating

• Char length extremely low (approx. 3 mm)

• After-flame time consistently 0 seconds

This combination of thermal and mechanical performance confirms suitability for FR clothing systems in demanding industries.

Customization Options

• FR tape materials (aramid, modacrylic, FR polyester)

• Color matching

• Metal finishes: nickel, brass, matte anti-reflection, anti-corrosion

• Slider options: auto-lock / non-lock / semi-lock

• Puller customization (shape / branding)

• Custom lengths for uniforms and PPE production