Thermoforming oloa e gaosia i luga o le faavae o laupepa, lea e faʻamaeʻaina e le extruder. O le palasitika o loʻo faʻapipiʻiina i se toniga faʻafefeteina e se faiga faʻapipiʻi, ma i lenei faagasologa o le mamafa na fausia e le faʻasolosolo faʻaauau ulu extruder.
O otaota palasitika ose vaega taua ole otaota malo. E tusa ai ma fuainumera, o le gaosiga faaletausaga o pusa palasitika i le lalolagi atoa e 130 miliona tone, ma 50% o oloa palasitika o mea faʻaaogaina,
Afai e vaevaeina le extruder masaga-screw i ni vaega autu se lua o le "extrusion" ma le "transmission", o le "extrusion vaega" o le vaega autu o le "faamautinoaina lelei", ma le "faasalalauga vaega" o le vaega autu o le "faaleleia lelei" ma le "faamautinoa lelei".
Lanu Masterbatch, e lauiloa foi o lanu, o se ituaiga fou o sui valivali faapitoa mo mea polymer, e lauiloa foi o le sauniuniga o pigmenti.
O mea fa'apipi'i laupapa fa'apipi'i fa'apu'upu'u e pei o le WPC o lo'o faia i alava maualalo-biomass e pei o sawdust, fasi laupapa, ofe mea'ai, pa'u araisa, pa'u araisa, atigi pinati, vaomago, ma isi mea e pei o mea autu autu. O loʻo faʻafefiloi ma se vaega patino o mea faʻavae palasitika e faʻaaoga ai mataupu faavae o le polymer interface chemistry ma uiga o le faʻatumuina o palasitika ma suiga. A maeʻa faʻapitoa faʻapitoa, e faʻapipiʻiina ma faʻapipiʻiina e avea ma mea e mafai ona toe faʻaaogaina ma toe faʻaaogaina ma le tele o oloa ma fausaga morphological eseese. WPC meafaitino e lima uiga:
O le meshing co rotating twin screw extruder matou te faʻaaogaina i la matou gaosiga o loʻo i ai ni faʻamaufaʻailoga autu e ono: maualuga o le vevela, maualuga o le mamafa, faʻamavaeina o le viscosity, faʻafefiloi index.