Chikafu kurongedza hutsanana mwero zvemukati hazvina kukwana
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1)
Utano chikafu chekurongedza zvinhu hazvina yakabatana mwero panguva ino yepamba haina kuumba yakabatana, yakamisikidzwa kuita kwehutano chikafu chekurongedza zvinhu, uye chete muhuwandu hushoma hwezvigadzirwa mumitemo yakajairwa, senge inochinjika kurongedza yeGB/T10004 & ndash;
2008 kurongedza epurasitiki inoumbwa firimu, bhegi, yakaoma komisheni extrusion komboni, 'zviratidzo zvezvinosara zvinonyungudutsa mune zvinoenderana.
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2)
Mazhinji ehutsanana mwero wezvekudya zvekurongedza zvinhu hazvishande pari zvino akawanda uye akawanda marudzi ekurongedza chikafu.
Kuti zvionekwe zvisaririra zvesolvent, nyika dzakasiyana pane zvinangwa zvezvipo zvayo.
In the GB/T10004 & ndash;
2008 kurongedza epurasitiki inoumbwa firimu, bhegi, yakaoma komisheni extrusion komboni, 'iyo huru inopihwa muyakajairwa solvent yasara huwandu haipfuuri 5 mg/m2, asi haina kutsanangura rudzi rwekunyungudutsa, muhuwandu hwe5 mg/m2 zvese. marudzi ehuwandu hwekunyungudutsa zvakare hauite kupatsanurwa kwakadzama.
National hutano mwero zvakare inorambidza kushandisa marara epurasitiki seyakagadzirwa zvinhu kugadzirwa kwemidziyo yepurasitiki yechikafu.
Asi kune zvakare kuvanza kukuru kwekukuvadza, kunogadzirwa neindasitiri mbishi zvinhu zvepurasitiki midziyo yekudya.
Kune epurasitiki mudziyo wakajairwa index muganho wakasununguka zvakanyanya, iyo yenyika standard komiti parizvino iri kushanda pakuvandudza nekuvandudza basa rakajairwa.
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3)
Mazhinji ekurongedza zvigadzirwa zvechigadzirwa zviyero hazvisi chete chikamu kune chinodiwa chekunyungudutsa zvisaririra zvinoonekwa tsananguro yemamwe akareruka ekunzwa indexes, senge kurongedza zvinhu hazvifanirwe kuve nekunhuhwirira kwakasiyana, kurongedza mvura inonyura haigone kunhuhwirira, nezvimwewo, asi ipapo. hapana chaiyo quantitative zviratidzo zvinodiwa zvinoiswa mberi.
Kurongedzerwa kwechikafu mukugadzira uye kusingadzivisike kune zvakasara zvinonyungudutsa.
Mune gravure kudhinda epurasitiki inoumbwa zvinhu uye yakanyungudika yakaoma musanganiswa process, inoda kushandisa yakawanda organic solvent senge toluene, ethyl acetate uye ethyl ketone, zvichingodaro, zvinoenderana nezvinodiwa zveiyo solvent mukugadzira kunofanirwa. kuva evaporate, asi nokuda kwezvikonzero zvakasiyana-siyana mukugadzirwa chaiko pachagara paine zvakawanda kana zvishoma hazvisi kunyungudika zvachose, inozivikanwa sezvisaririra zvinonyungudutsa.
Residual solvents musanganiswa wemarudzi akati wandei ezvinonyungudutsa, kazhinji kana zviri muzvinonyungudutsa zviri pazasi pehumwe hwukoshi pfungwa yevanhu yekunhuwidza haigoni kunzwa kuvapo kwayo, asi manzwi evanhu vanogona kuona.
Zvakadai sePVC (
PVC)
Kuputira kwepurasitiki kugomarara kwakakonzera mhedzisiro yakasimba mudzimba.
《GB9681—
1988 chikafu kurongedza PVC kuumba chigadzirwa chehutano chiyero 'mune chaiyo kupihwa, vinyl chloride monomer zvemukati ishoma pane kana kuenzana ne1 mg pakirogiramu.
Iyo vinyl chloride monomer kuumbwa iri muPVC yekudya firimu, mushure mekuita kuti muviri wemunhu uve necarcinogenicity.
European Union neUnited States, Japan, dzakarambidza chigadzirwa ichi chinoshandiswa pakudya.
Yakagadziridzwa kakawanda, asi zvakanyanya kuita kuti mamwe maparamita aya achinje.
“
Cling firimu zviitiko & kwese;
Kamwe zvakare akafumura iyo nyika yedu yakakodzera zviyero zvakapa basa lag.
Saka chikafu chekurongedza chikafu kuti uone zvisaririra zvezvinonyungudutsa kuti ugadzire quantitative index zvakakosha.
