Kupupa kwepurasitiki kunogona kukamurwa kuita matatu maitiro: kuumbwa kwebubble nuclei, kuwedzera kwebubble nuclei, uye kusimba kwemiviri yefuro. Kune PVC foam sheets, kuwedzera kwebubble core kune mhedzisiro pamhando yefoam sheet. PVC ndeyemaketani akatwasuka mamorekuru, ane mapfupi molecular cheni uye yakaderera kunyungudika simba. Munguva yekuwedzera kwebubble kuita mabhubhu, kunyungudika hakuna kukwana kuvhara mabhuru, uye gasi rinowanzo kufashukira uye kusanganisa kuita mabhuru makuru, kuderedza chigadzirwa chemhando yefoam sheet.
Chinhu chakakosha pakuvandudza kunaka kwePVC foam sheets ndeyekuwedzera kunyunguduka kwePVC. Kubva pakuongororwa kwemaitiro ekugadzirisa zvinhu zvepolymer, kune nzira dzakasiyana-siyana dzekuvandudza kunyunguduka kwePVC, pakati peiyo nzira inonyanya kushanda ndeyekuwedzera zvinowedzera kuvandudza simba rekunyunguduka uye kuderedza kupisa kwekushisa. PVC ndeye amorphous zvinhu, uye simba rekunyunguduka rinodzikira nekuwedzera kwekunyunguduka kwekushisa. Sezvineiwo, simba rekunyunguduka rinowedzera nekudzikira kwekushisa kwekunyunguduka, asi kutonhora kwacho kunogumira uye kunongoita basa rekubatsira. ACR processing agents ane mhedzisiro yekuvandudza simba rekunyunguduka, pakati peiyo inopupa maregulator ndiyo inonyanya kushanda. Simba rekunyunguduka rinowedzera nekuwedzera kwekupupa regulator zvemukati. Kazhinji kutaura, chero sikururu iine kupararira kwakakwana uye kugona kusanganisa, kuwedzera yakakwira viscosity foaming regulators ine zvakanyanya kukosha pakuvandudza simba rekunyungudika. Basa rekugadzirisa zviyamuro muPVC foam sheets: ACR kugadzirisa aids inosimudzira PVC kunyunguduka, inonatsiridza kutsetseka kwepamusoro, inovandudza kunyunguduka kunyunguduka, uye kuwedzera kunyunguduka uye kusimba. Inobatsira pakupeta mabubbles uye kudzivirira kudonha kwebubble. Huremu hwema molecular huremu uye dhizaini yeanopupa maregi ane chekuita kwakakura pahuwandu hwemapepa efuro: sezvo huremu hwemamorekuru hunowedzera, simba rePVC rinonyunguduka rinowedzera, uye kuwanda kwemapepa efuro kunogona kuderedzwa, izvo zvine mhedzisiro yakafanana nekuwedzera chipimo chezvinodzora. Asi mhedzisiro iyi haina hukama hwemutsara. Kuramba uchiwedzera huremu hwemamorekuru kana dosi haina chinhu chakakosha pakudzikisa density, uye density inozogara inogara.
Pane hukama hwakakosha pakati pezvinodzora zvinopupa nezvinobuda furo. Pane yakaenzana poindi pakati pehuro hwefoam sheets uye foam regulators. Kupfuura iyi poindi yekuenzanisa, kuwanda kwemapepa efuro hakukanganiswe nezviri mukati meanopupa uye anoramba akamira. Kureva kuti, kuwedzera huwandu hwehuputi mumiriri haigone kuderedza density. Chikonzero chechiitiko ichi ndechekuti pasi pehumwe huwandu hwezvinodzora zvinopupuma, simba rekunyunguduka rePVC rinogumira, uye gasi rakawandisa rinogona kukonzera kudonha kana kubatanidzwa kwefoam masero.
Nguva yekutumira: Mar-28-2024
