Fashion farin saitin nuni akwatin sigari (kowane saitin akwatuna 10, kowane akwati na fakiti 7)

Farin kwali nau'in takarda ne mai kauri mai ƙarfi da nauyi babba. Domin saman ba shi da launi, ana kiran shi farin kwali. Fararen kwali na kasar Sin ya kasu kashi uku A, B, C. Farin A grade bai gaza kashi 92% ba; B grade ba kasa da 87%; Matsayin C bai kasa da 82%.
Danyen kayan farin kwali shine sinadarin bleached 100%.
Farin kwali don fakitin taba yana buƙatar taurin ƙarfi, juriya, santsi da fari. Abubuwan da ake buƙata na takarda suna lebur, babu ratsi, tabo, ƙwanƙwasa da bumps, warping da nakasar samarwa. Kamar yadda fakitin sigari tare da farin kwali galibi yana amfani da injin bugu mai sauri don bugawa, don haka buƙatun buƙatun tashin hankali na farin kwali suna da girma. Har ila yau, an san juriya na tashin hankali a matsayin ƙarfin ƙarfi ko ƙarfin ƙarfi, wanda ke nufin iyakar ƙarfin da takarda zai iya jurewa lokacin da ya karye, wanda aka bayyana a kN/m. Na'ura mai sauri gravure bugu don ja da takarda Rolls, high-gudun bugu don jure babban tashin hankali, idan sabon abu na takarda karya sau da yawa, shi ne daure haifar da m downtime, rage yadda ya dace, amma kuma ƙara asarar takarda.
Farin kwali nau'i biyu ne na fakitin sigari, ɗaya FBB ( yellow core white card), ɗaya SBS (white core white card), fakitin sigari masu amfani da FBB da SBS farin kwali ne mai gefe guda ɗaya, FBB ya ƙunshi sassa uku. na ɓangaren litattafan almara, fuska da ƙasa Layer ta amfani da sulfate itace ɓangaren litattafan almara, da core Layer ta amfani da sinadaran inji nika ɓangaren litattafan almara itace. Gefen gaba (bangaren bugu) shine rufin rufi, wanda aka yi amfani da shi tare da magudanar ruwa biyu ko uku, yayin da gefen baya ba shi da rufin rufi. Tunda tsakiyar Layer an yi shi da sinadari da injina na itace, ɓangaren litattafan almara yana da yawan amfanin itace (85% -90%), kuma farashin samarwa ya yi ƙasa da ƙasa, don haka farashin kwali na FBB ya yi ƙasa kaɗan.
FBB pulp yana da dogon fibers da ƙananan ƙananan fibers da fiber bundles, don haka kaurin takarda da aka gama ya fi kyau, kuma gram ɗaya na FBB ya fi SBS girma, wanda kuma yawanci ya ƙunshi nau'i uku na ɓangaren litattafan almara, saman saman Layer. , core Layer da kasa Layer duk suna amfani da bleached sulfate ɓangaren litattafan almara. Gefen gaba (bangaren bugu) shi ne abin rufe fuska, wanda ake amfani da shi sau biyu ko sau uku tare da squeegee iri ɗaya kamar FBB, yayin da gefen baya ba shi da Layer Layer. Tun da core Layer kuma an yi shi da bleached sulfate ɓangaren litattafan almara, fari ya fi girma, don haka ana kiran shi farin core white card. A lokaci guda, filayen ɓangaren litattafan almara suna da ƙanƙanta kuma takarda ta fi ƙarfi, don haka SBS ya fi siriri fiye da FBB mai nauyin gram iri ɗaya. Misali, kaurin 230g/m2 FBB na Hongta Renheng shine 320μm, yayin da kaurin 230g/m2 SBS shine 295μm.