Fiberglass ákwà thermal shrinkage bụ isi ihe na-akpata enweghị nkwụsi ike nke teepu PTFE. Na PTFE sintering okpomọkụ (360-400°C), a na-ahapụ nrụgide ịkwa akwa. Ọ bụrụ na ejideghị ya, akwa na-adaba; Ọ bụrụ na ejidere ya, a na-ekpochi nrụgide latent, na-eme ka ọ daa mbà n'oge ọgwụgwọ nrapado (150-200 Celsius) na ikpo ọkụ njedebe. Ngwọta: jiri fiberglass nke etinyere tupu ọkụ na <0.5% shrinkage na 400 ° C, na-ewepụ nrụgide fọdụrụnụ tupu mkpuchi.