Chimwe chikonzero ndechekuti simba renzvimbo yekunyunguduka kwemvura pacharo rakaderera zvakanyanya, zvichiita kuti mabubbles aumbe kubva kunze mukati;
Chikonzero chechipiri ndechekuti nekuda kwekumanikidzwa kwakaderera kwakatenderedza kunyunguduka, mabubble emunharaunda anokura uye simba rawo rinoderera, zvichiita mabubble kubva mukati zvichienda kunze. Mukugadzira, hapana musiyano uripo pakati pemabasa maviri aya, uye zvinokwanisika kuti aripo panguva imwe chete. Mabubble mazhinji anokonzerwa nekuwedzera kusina kuenzana kwemabubble emunharaunda, zvichikonzera kudzikira kwesimba rekunyunguduka.
Muchidimbu, kugadzirwa kwemabubbles mumapurasitiki ane furo kunonyanya kusanganisira zvinhu zvinotevera:
Kugadzirwa kwebhodhi rePVC foam kunowanzo shandiswa zvitatu zvakasiyana zvePVC foam regulators: rudzi rwekupisa, rudzi rwe endothermic, kana rudzi rwe endothermic ne exothermic composite equilibrium. Tembiricha yekuora kwePVC foaming regulator yakakwira, inosvika 232 ℃, ichipfuura tembiricha yekugadzirisa yePVC. Pakushandisa, tembiricha yekuora inofanira kudzikiswa. Nokudaro, pakudzora furo rezvinhu zvePVC, PVC foaming regulators inowanzo sarudzwa. Rudzi urwu rwefuro rekutonga rune mwero wepamusoro wekuora, ungangoita 190-260ml/g, kukurumidza kuora, uye kupisa kukuru. Zvisinei, nguva yekuora ipfupi uye kukurumidza kwakasimbawo. Naizvozvo, kana dosage yePVC foaming agent yakakwira zvakanyanya uye kugadzirwa kwegasi kwakanyanya, zvichaita kuti kumanikidzwa mukati mefuro kuwedzere nekukurumidza, saizi yefuro ikure zvakanyanya, uye gasi richaburitswa nekukurumidza, zvichikonzera kukuvara kwechimiro chefuro, kupararira kusina kuenzana kwehukuru hwefuro, uye kunyange kuumbwa kwechimiro chesero rakavhurika, izvo zvichagadzira mabhuru makuru nemavoids munharaunda. Pakugadzira zvigadzirwa zvepurasitiki zvine furo, zvinodzora furo zvePVC zve exothermic hazvifanirwe kushandiswa zvega, asi zvinofanirwa kushandiswa pamwe chete nezvinhu zvinodzivirira furo zve endothermic kana pamwe chete nezvinhu zvinodzivirira furo zve exothermic balanced composite chemical. Inorganic foaming agent - sodium bicarbonate (NaHCO3) imushonga wefuro we endothermic. Kunyangwe mwero wefuro uri wakaderera, nguva yefuro yakareba. Kana ikasanganiswa nezvinodzora furo zvePVC, inogona kuita basa rinoenderana uye rakaringana. Mushonga wefuro we exothermic PVC unovandudza kugona kwekugadzira gasi kwemushonga wefuro we endothermic, nepo muchina wefuro we endothermic PVC uchitonhodza wekutanga, uchidzikamisa kuora kwawo, uye uchienzanisa kuburitswa kwegasi, uchidzivisa kudzikira kwekupisa kwemukati kwemaplate akakora, uchideredza kunaya kwemvura, uye uine mhedzisiro yekuchena.
Panyaya yekuti hazvikanganisi mwero wekuputika kwefuro, zvakakodzera kuwedzera mamwe ma endothermic PVC foaming regulators kuti atsive mamwe ma exothermic foaming agents, kuitira kudzikamisa kuputika kunokonzerwa nekuwedzera mamwe exothermic foaming agents.
Nguva yekutumira: Chivabvu-13-2024
