Kuti uone dhigirii ye shrinkage ichaitika kana tepi ye polyolefin ichiiswa mukupisa kwenguva yakatarwa.

2.NziraPP (polypropylene) yakarukwa sagatepi

5 tape tape samples dzakasarudzika dzakachekwa kusvika pakureba chaiko kwe100 cm (39.37”). Izvi zvinozoiswa muovheni patembiricha isingaperi ye270°F (132°C) kwenguva yemaminetsi gumi nemashanu. Thepp sackmatepi anobviswa muchoto uye anobvumirwa kutonhora. Matepi anobva apimwa uye chikamu chechidimbu chinoverengerwa kubva pamusiyano pakati pehurefu hwepakutanga uye kureba kwakaderedzwa mushure mehovhoni, zvese zvakakamurwa nehurefu hwepakutanga.

3.Apparatus

a) A 100 cm base sampuli yekucheka bhodhi.

b) Badza rekucheka.

c) Magnetized poto (ye PE tepi chete)

d) Induction inopisa ndiro. (ye PE tepi chete)

e) Mbambo. (ye PE tepi chete)

f) Ovheni pa270°F. (yePP tepi chete)

g) Mira wachi.

h) Calibrated Mutongi ane zvikamu mu cm.

a) Kushandisa bhodhi rekucheka uye kuchenjerera kuti usatambanudze tepi, cheka kubva pa5 zvakasarudzwa zvakasarudzwamapakeji epp akarukwatepi, chaiyo 100 cm kureba.

b) Isa sampuli muchoto pa 270 ° F uye tanga nguva yewachi.

c) Mushure memaminitsi gumi nemashanu, bvisa sampuli kubva muchoto uye uite kuti dzitonhorere.

d) Edza urefu hwematepi uye uenzanise nehurefu hwepakutanga hwe100 cm. Chiyero chekudzikira chakaenzana nemusiyano pakati pehurefu hwakakamurwa nehurefu hwepakutanga.

e) Rekodha pasi peiyo shrinkage column yeQuality Control Tape Results sheet kuderera kwega kwega tepi uye avhareji yehunhu hushanu.

f) Tarisa zvawanikwa uchipesana neavhareji yepamusoro muzana ye shrink yakanyorwa mune inoshanda chigadzirwa yakatarwa (TD 900 yakatevedzana).