I.Ngwa:
A na-ejikarị ngwaọrụ ule nrụgide gburugburu ebe obibi nweta ihe dị egwu nke mgbawa na mbibi nke ihe ndị na-abụghị ọla dị ka plastik na rọba n'okpuru mmetụta ogologo oge nke nrụgide n'okpuru ebe mkpụrụ ya. A na-atụle ike nke ihe iji guzogide mmebi nrụgide gburugburu ebe obibi. A na-eji ngwaahịa a eme ihe n'ọtụtụ ebe na plastik, rọba na mmepụta ihe polymer ndị ọzọ, nyocha, nyocha na ụlọ ọrụ ndị ọzọ. Enwere ike iji bath thermostatic nke ngwaahịa a dị ka ngwa nnwale nọọrọ onwe ya iji dozie ọnọdụ ma ọ bụ ọnọdụ okpomọkụ nke ụdị ule dị iche iche.
II.Ụkpụrụ Nzukọ:
ISO 4599- 《 Plastics - Mkpebi nke iguzogide nrụgide gburugburu ebe obibi mgbawa (ESC) - Bent strip method》
GB/T1842-1999- Usoro nnwale maka nrụgide gburugburu ebe obibi - mgbawa nke plastik polyethylene.
ASTMD 1693- Usoro nnwale maka nrụgide gburugburu ebe obibi - mgbawa nke plastik polyethylene.