Chimwe chikonzero ndechokuti simba remunharaunda rekunyunguduka pacharo rakanyanya kuderera, zvichiita kuti mabhuru aumbe kubva kunze mukati;
Chikonzero chechipiri ndechekuti nekuda kwekudzvinyirirwa kwepasi kwakatenderedza kunyungudika, mabhuru emunharaunda anowedzera uye simba rawo rinopera simba, richigadzira mabhuru kubva mukati kunze. Muchiito chekugadzira, panenge pasina musiyano pakati peaya mabasa maviri, uye zvinogoneka kuti aripo panguva imwe chete. Mazhinji emabhubhu anokonzerwa nekusaenzana kwekuwedzera kwemabhuru emunharaunda, zvichikonzera kudzikira kwesimba rekunyunguduka.
Muchidimbu, kugadzirwa kwemabhubhu mumapepa epurasitiki ane furo kunosanganisira zvinotevera zvinhu:
Kugadzirwa kwePVC foam board kazhinji kunotora matatu akasiyana PVC furo regulators: kupisa mhando, endothermic mhando, kana endothermic uye exothermic composite equilibrium mhando. Iyo tembiricha yekuora yePVC inopupuma regulator yakakwira, inosvika 232 ℃, inodarika tembiricha yekugadziridza yePVC. Paunenge uchiishandisa, tembiricha yekuora inoda kudzikiswa. Naizvozvo, kana uchigadzirisa kupupa kwePVC zvinhu, PVC furo regulators inowanzosarudzwa. Rudzi urwu rwekupupa regulator rine huwandu hwekupupuma, hungangoita 190-260ml/g, kukurumidza kuora kwekuora, uye kupisa kukuru. Zvisinei, nguva yekupupa ipfupi uye kamwe kamwe kwakasimbawo. Naizvozvo, kana iyo dosage yePVC foaming agent yakakwira zvakanyanya uye chizvarwa chegasi chakanyanya kukura, zvinokonzeresa kuti kumanikidza mukati mebubble kuwedzere nekukurumidza, saizi yebubble kukura zvakanyanya, uye gasi richakurumidza kuburitswa. kukonzera kukuvadzwa kwechimiro chebubble, kugovera kusingaenzaniswi kwehukuru hwebubble, uye kunyangwe kuumbwa kweyakavhurika sero chimiro, icho chinoburitsa mabhuru makuru uye voids munharaunda. Paunenge uchigadzira zvigadzirwa zvepurasitiki zvine furo, exothermic PVC foaming regulators haifanirwe kushandiswa yega, asi inofanirwa kushandiswa pamwe chete ne endothermic foaming agents kana musanganiswa nekupisa uye exothermic yakaenzana inoumba makemikari anopupa emakemikari. Inorganic foaming agent - sodium bicarbonate (NaHCO3) is an endothermic foaming agent. Kunyange zvazvo kupupa kwakaderera, nguva yekupupa irefu. Kana yakasanganiswa nePVC foaming regulators, inogona kutamba inopindirana uye yakaenzana basa. Iyo exothermic PVC inopupuma mumiriri inovandudza kugona kwekugadzira gasi kweiyo endothermic foaming agent, nepo endothermic PVC foaming regulator inotonhorera yekare, inodzikamisa kuparara kwayo, uye inoyera kuburitswa kwegasi, ichivharira kupisa kwemukati kushatisa kwemahwendefa akakora, kuderedza kunaya kwemvura. zvisaririra, uye kuva nekuita chena.
Pamusana pekusakanganisa chiyero chekupupa, zvakafanira kuwedzera mamwe endothermic PVC foaming regulators kutsiva mamwe exothermic foaming agents, kuitira kudzvinyirira kuputika kunokonzerwa nekuwedzera mamwe exothermic foaming agents.
Nguva yekutumira: May-13-2024
