Fiberglass ntama thermal shrinkage ne ade titiriw a ɛde PTFE tape dimensional instability ba. Wɔ PTFE sintering hyew (360-400°C) mu no, wogyae nwene nhyɛso a aka no. Sɛ wɔanhyɛ no so a, ntama no twetwe; sɛ wɔhyɛ so a, wɔde nhyɛso a ahintaw no to mu, na ɛma akyiri yi ɛtwetwe bere a wɔde ntama resa (150-200°C) ne ɔhyew a wɔde di dwuma awiei no. Ano aduru: fa fiberglass a wɔadi kan ayɛ no hyew a ɛyɛ <0.5% a ɛtwetwe wɔ 400°C di dwuma, na yi nhyɛso a aka no fi hɔ ansa na wode akata so.