Mabokosi a ndudu amitundu yoyera yowonetsera (gulu lililonse la mabokosi 10, bokosi lililonse la mapaketi 7)

White makatoni ndi mtundu wa pepala wandiweyani ndi kulimba ndi kulemera kwakukulu. Chifukwa chakuti pamwamba sipakhala mtundu, nthawi zambiri amatchedwa white cardboard. Makatoni oyera aku China amagawidwa m'makalasi atatu A, B, C. Kuyera kwa kalasi A sikuchepera 92%; B kalasi si osachepera 87%; C kalasi si osachepera 82%.
Zopangira za makatoni oyera ndi mankhwala oyeretsedwa 100%.
Makatoni oyera a mapaketi a ndudu amafunikira kuuma kwakukulu, kukana kusweka, kusalala komanso kuyera. The pepala pamwamba zofunika ndi lathyathyathya, palibe mikwingwirima, mawanga, mano ndi tokhala, warping ndi mapindikidwe kupanga. Monga paketi ndudu ndi makatoni woyera makamaka ntchito mkulu-liwiro gravure makina osindikizira kusindikiza, kotero woyera makatoni mavuto index zofunika ndi mkulu. Kukaniza kwamphamvu kumadziwikanso ngati mphamvu yamphamvu kapena mphamvu yamphamvu, kutanthauza kupsinjika kwakukulu komwe pepala limatha kupirira likasweka, kufotokozedwa mu kN/m. Mkulu-liwiro gravure kusindikiza makina kukoka masikono pepala, mkulu-liwiro kusindikiza kupirira mikangano lalikulu, ngati chodabwitsa cha kusweka pepala nthawi zambiri, uyenera kuchititsa downtime pafupipafupi, kuchepetsa dzuwa, komanso kuonjezera imfa ya pepala.
Pali mitundu iwiri ya makatoni oyera a mapaketi a ndudu, imodzi ndi FBB (yellow core white card), imodzi ndi SBS (white core white card), mapaketi a ndudu omwe amagwiritsa ntchito FBB ndi SBS ndi makatoni oyera okutidwa mbali imodzi, FBB imakhala ndi zigawo zitatu. zamkati, nkhope ndi pansi wosanjikiza ntchito sulphate nkhuni zamkati, pachimake wosanjikiza ntchito mankhwala makina akupera nkhuni zamkati. Mbali yakutsogolo (mbali yosindikizira) ndi chophimba chophimba, chomwe chimagwiritsidwa ntchito ndi squeegees awiri kapena atatu, pamene mbali yakumbuyo ilibe wosanjikiza. Popeza wosanjikiza wapakati amapangidwa ndi zamkati zamakina ndi makina opangidwa ndi matabwa, zamkati zimakhala ndi zokolola zambiri ku nkhuni (85% -90%), ndipo mtengo wake ndi wotsika kwambiri, kotero mtengo wa FBB makatoni ndi otsika.
FBB zamkati zimakhala ndi ulusi wautali komanso ulusi wocheperako ndi mitolo ya ulusi, kotero makulidwe a pepala lomalizidwa bwino, ndipo gramu yomweyo ya FBB ndi yokhuthala kwambiri kuposa SBS, yomwe nthawi zambiri imakhala ndi zigawo zitatu za zamkati, wosanjikiza wapamwamba. , core layer ndi pansi zonse zimagwiritsa ntchito bleached sulphate wood zamkati. Mbali yakutsogolo (mbali yosindikizira) ndi chophimba chophimba, chomwe chimagwiritsidwa ntchito kawiri kapena katatu ndi squeegee yofanana ndi FBB, pamene mbali yakumbuyo ilibe wosanjikiza. Popeza wosanjikiza pachimake amapangidwanso ndi bleached sulfate zamkati, woyera ndi apamwamba, choncho amatchedwa woyera pachimake woyera khadi. Panthawi imodzimodziyo, ulusi wa zamkati ndi waung'ono ndipo pepala ndi lolimba, kotero SBS ndi yowonda kwambiri kuposa FBB ya kulemera kwa gramu yomweyo. Mwachitsanzo, makulidwe a 230g/m2 FBB a Hongta Renheng ndi 320μm, pomwe makulidwe a 230g/m2 SBS ndi 295μm.