Yintoni omawuyenze ukuba umgangatho wezixhobo zokulawula i-PVC foaming awukho semgangathweni?

Ngexesha lenkqubo yokufutha izinto, igesi eboliswa yiarhente yokufutha yenza amaqamza kwi-melt. Kukho umkhwa wamaqamza amancinci akhula aye kumaqamza amakhulu kula maqamza. Ubungakanani kunye nobungakanani bamaqamza abuhambelani nje kuphela nobungakanani bearhente yokufutha eyongeziweyo, kodwa kunye namandla okufutha kwepolymer. Ukuba ubunzulu buphantsi kakhulu, igesi inokubaleka ngokulula xa isasazeka kumphezulu wokufutha, kwaye amaqamza amancinci adibana ukuze enze amaqamza amakhulu. Iitsheyini ezinde zemolekyuli zezilawuli zokufutha ziyabanjwa kwaye zinamathele kwiitsheyini zemolekyuli zePVC, zenze isakhiwo esithile senethiwekhi. Kwelinye icala, ikhuthaza ukwenziwa kweplastiki yezinto, kwaye kwelinye icala, iphucula amandla okufutha kwePVC, ukuze udonga lweseli yefoam lukwazi ukumelana noxinzelelo lwegesi ngaphakathi kwiseli yefoam ngexesha lenkqubo yokufutha, ukuze lungaqhekeki ngenxa yamandla angonelanga. Izilawuli zefoam zingenza ii-pores zemveliso zibe ncinci kwaye zibe zininzi, zinesakhiwo se-pore esifanayo nesifanelekileyo, nto leyo enciphisa kakhulu uxinano lomzimba wefoam. Umgangatho ophantsi okanye umthamo onganeleyo wezilawuli zokufutha unokukhokelela kumandla aphantsi efoam, okubangela ukugqabhuka okanye amaqamza anentambo.

Ubunzima beemolekyuli kunye nokuqina kwee-regulators ze-foam eziveliswa ngabavelisi abahlukeneyo kwahluka kakhulu. Xa iimveliso ze-foam ziqhekeza okanye zidibanisa amaqamza, kunye nezinye iindlela zingasebenzi, ukutshintsha i-regulator ye-foam okanye ukwandisa umthamo ngokufanelekileyo kunokubangela iziphumo ezibalulekileyo. Nangona kunjalo, ukongeza okanye ukutshintsha ii-regulators ze-foam ezinobunzima obuphezulu beemolekyuli kunokunyusa uxinano lwemveliso ngenxa ye-viscosity egqithisileyo, ethintela ukwanda kwamaqamza kwi-melt. Kwaye ngenxa ye-viscosity ephezulu ye-melt, ukuguquguquka kuya kuhla, okubangela ukukhutshwa okungalinganiyo kwe-mold, okuchaphazela ukuthamba komphezulu weplate, kunye nexesha elifutshane lemveliso, okukhokelela ekusileleni kwe-mold paste, ingakumbi xa kuveliswa iiplate ezinobukhulu obungaphantsi kwe-10mm.