This guide covers PTFE high-temperature tape selection for injection molding demolding and anti-stick applications. Temperature-based selection: ≤260°C for general plastics (standard silicone PSA tape, 0.13-0.18mm); 260-300°C for high-temperature engineering plastics like PC, PA66, POM (high-temp silicone adhesive, 0.18-0.25mm); 300-400°C for PEEK, LCP, PPS near hot runners (adhesive tape fails; use adhesive-free PTFE cloth or PFA film). Material-based selection: tacky materials need high-release pure PTFE surfaces; glass/mineral filled materials require heavy-duty 0.25mm+ wear-resistant tape; corrosive additives demand chemically resistant adhesive and dense substrate; static-sensitive applications need anti-static black PTFE tape.

High-tensile PTFE high-temperature cloth is made by coating PTFE onto high-strength fiberglass fabric, offering tensile strength, heat resistance, non-stick properties, chemical resistance, and low friction. Key applications include: industrial conveying (heat shrink packaging, food baking, textile dryers, paper/film drying); composite molding release cloth and hot press cushion liners; welding protective curtains and thermal insulation jackets; electrical motor and transformer insulation; building sliding bearings and pipeline supports; chemical filtration and valve sealing in corrosive environments. High tensile strength ensures durability under tension, tearing, repeated flexing, and high-temperature mechanical stress across these diverse heavy-duty applications.

During sintering, PTFE particles on fiberglass fabric melt above 327°C, destroying original folded-chain lamellae and particle boundaries to form an amorphous melt. Upon cooling, PTFE recrystallizes into spherulites composed of radially oriented lamellae, with crystallinity ranging 50–70%. Cooling rate determines crystal perfection: slow cooling yields higher crystallinity, larger spherulites, greater hardness; rapid quenching gives finer spherulites and improved flexibility.