Zotsatira za chiyero cha zamkati pamtundu wa pepala

Kuyeretsedwa kwa zamkati kumatanthauza kuchuluka kwa cellulose komanso kuchuluka kwa zonyansa mu zamkati. Abwino zamkati ayenera kukhala wolemera mu mapadi, pamene zili hemicellulose, lignin, phulusa, extractives ndi zina sanali mapadi zigawo zikuluzikulu ayenera kukhala otsika momwe angathere. Zomwe zili mu cellulose zimatsimikizira chiyero ndi kufunikira kwa zamkati, ndipo ndi chimodzi mwazizindikiro zazikulu zowunika zamkati. Makhalidwe a high purity zamkati:

(1) apamwamba durability, mapadi ndi chigawo chachikulu chimene chimapanga mphamvu ya pepala, mkulu chiyero zamkati zikutanthauza apamwamba mapadi okhutira, kotero pepala anapanga ali wamphamvu misozi kukana, kukana pindani ndi katundu zina thupi ndi makina, kuwonjezera moyo utumiki wa pepala.
(2) Kugwirizana kwamphamvu, ulusi woyera wa cellulose ukhoza kupanga maukonde oyandikana kwambiri pakati pa pepala kuti apititse patsogolo mgwirizano wamkati, kotero kuti mapepalawo sakhala ophweka kuti awonongeke kapena kusweka pamene akugonjetsedwa ndi mphamvu zakunja, kuti apititse patsogolo mphamvu zonse za pepala.
(3) kuyera kwakukulu, kukhalapo kwa zonyansa nthawi zambiri kumakhudza kuyera ndi gloss ya pepala. Zamkati zoyera kwambiri, chifukwa cha kuchotsedwa kwa zonyansa zambiri zamitundu, zimapangitsa kuti pepala liwonetsere kuyera kwachilengedwe, komwe kuli koyenera kusindikiza, kulemba ndi kuyika, ndi zina zambiri, ndikuwonjezera mawonekedwe a mankhwalawa.
(4) bwino magetsi kutchinjiriza katundu, mapadi ali ndi katundu wabwino insulating, pamene sanali mapadi zigawo zikuluzikulu mu zamkati, monga lignin, akhoza kukhala conductive kapena hygroscopic zinthu, okhudza kutchinjiriza magetsi pepala. Chifukwa chake, mapepala opangidwa kuchokera ku zamkati zoyera kwambiri amakhala ndi ntchito zosiyanasiyana paukadaulo wamagetsi, monga pepala lotchinjiriza chingwe, pepala la capacitor, ndi zina zambiri.
Kukonzekera bwino kwa zamkati zamkati, makampani amakono a mapepala amagwiritsa ntchito njira zosiyanasiyana zotsogola, monga pulping mankhwala (kuphatikizapo sulphate pulping, sulphite pulping, etc.), pulping mechanical (monga matenthedwe akupera mechanical zamkati TMP) ndi chemical mechanical pulping (CMP) ndi zina zotero. Njirazi zimawongolera chiyero cha zamkati pochotsa kapena kutembenuza zinthu zomwe si cellulosic zamafuta.
Zamkati zoyera kwambiri zimagwiritsidwa ntchito kwambiri m'magawo ambiri monga mapepala apamwamba a chikhalidwe, mapepala opangira mapepala, mapepala apadera (mwachitsanzo, mapepala otsekemera a magetsi, mapepala a fyuluta, mapepala achipatala, etc.)

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