nhau

Abstract: Pepa ndiyo inonyanya kushandiswa kurongedza kudhinda.Hunhu hwayo hwemuviri hune hunhu hwakananga kana husina kunanga pamhando yekudhinda.Kunzwisisa kwakaringana uye kugona chimiro chepepa, zvinoenderana nehunhu hwechigadzirwa, zvine musoro kushandisa bepa kuvandudza kunaka kwezvigadzirwa zvekudhinda, kuchaita basa rakanaka mukusimudzira.Iri bepa rekugovera maitiro ezvinyorwa zvine chekuita nebepa, kuitira shamwari referensi:

Pepa rokudhinda

Chero yemhando dzakasiyana dzepepa rakadhindwa rine zvimiro, zvichienderana nenzira yekudhinda.

Pepa rinonyanya kushandiswa kudhinda.Maererano nekushandiswa inogona kukamurwa kuva: newsprint, mabhuku uye periodicals bepa, cover bepa, securities bepa uye zvichingodaro.Maererano nemitoo yakasiyana-siyana yokudhinda inogona kukamurwa kuva letterpress printing paper, gravure printing paper, offset printing paper zvichingodaro.

1 Quantitative

Zvinoreva huremu hwebepa pachikamu cheyuniti, inoratidzirwa neg/㎡, kureva, huremu hwegiramu re 1 square mita bepa.Huwandu hwehuwandu hwepepa hunotaridza humiro hwebepa, senge kusimba kwesimba, kubvarura degree, kusimba, kuoma uye ukobvu.Ichi ndichowo chikonzero chikuru nei muchina wekudhinda wepamusoro-soro usina kunaka kune bepa rehuwandu pazasi 35g/㎡, kuitira kuti zvive nyore kuoneka bepa risingaite, kudhindisa hakubvumirwe uye zvimwe zvikonzero.Naizvozvo, zvichienderana nehunhu hwemidziyo, kurongeka kwehuwandu hwezvikamu zvekudhinda zvinoenderana nekuita kwayo kunogona kugadzirwa, kuitira kudzikisa zvirinani kushandiswa, kuvandudza kunaka kwezvigadzirwa uye kudhinda kunyatsoshanda kwemidziyo.

2 Hukobvu

Ukobvu hwebepa, chiyero chekuyera chinowanzo ratidzwa mu μm kana mm.Ukobvu uye kuwanda uye compactness ane hukama hwepedyo, kazhinji, ikobvu yepepa yakakura, huwandu hwayo hunoenderana nepamusoro, asi hukama pakati pezviviri hahuna mhedziso.Rimwe bepa, nyangwe rakatetepa, rinoenzana kana kudarika ukobvu.Izvi zvinoratidza kuti kusimba kwepepa fiber chimiro kunotaridza huwandu uye ukobvu hwebepa.Kubva pakuona kwekudhinda uye kurongedza mhando, yunifomu ukobvu hwepepa hwakakosha zvikuru.Zvikasadaro, zvichakanganisa otomatiki kuvandudza bepa, kudhinda kumanikidza uye inki mhando.Kana iwe ukashandisa akasiyana gobvu mapepa akadhindwa mabhuku, achaita kuti bhuku rakapedzwa ribudiswe kwakakosha ukuru musiyano.

3 Kusimba

Zvinoreva huremu hwebepa pa cubic centimita, inoratidzwa mu g/C㎡.Kusungirirwa kwepepa kunotarwa nehuwandu uye kukora maererano nechirevo chinotevera: D = G / D × 1000, apo: G inomiririra huwandu hwepepa;D ndiko kukora kwepepa.Kusimba chiyero chehuwandu hwechimiro chepepa, kana yakanyanya kuomesesa, bepa brittle crack, opacity uye inki absorption inodzikiswa zvakanyanya, kudhinda hakusi nyore kuoma, uye nyore kugadzira inonamira tsvina yepasi chiitiko.Nokudaro, kana kudhinda bepa nehupamhi hwepamusoro, kutarisisa kunofanira kubhadharwa kune kudzora kunonzwisisika kwehuwandu hweink coating, uye kusarudzwa kwekuoma uye inoenderana neingi.

4 Kuoma

Iko kuita kwepepa kuramba kune chimwe chinhu kudzvanywa, asiwo bepa fiber tishu rough kuita.Kuoma kwepepa kwakaderera, kunogona kuwana chiratidzo chakajeka.Kudhinda kweletterpress kunowanzoenderana nekudhinda nebepa rine kuomarara kwakaderera, kuitira kuti inki yekudhinda yakanaka, uye mwero wekuramba wepureti yekutsikisa wakakwira zvakare.

5 Kupfava

Zvinoreva chiyero chebepa pamusoro pebump, unit mumasekonzi, inogona kuyerwa.Nheyo yekuona ndeiyi: pasi peimwe vacuum nekumanikidzwa, imwe vhoriyamu yemhepo kuburikidza nepamusoro pegirazi uye sampuli yepasi gap pakati penguva yakatorwa.Iyo inotsvedzerera bepa, iyo inononoka mhepo inofamba nepakati payo, uye zvinopesana.Kudhinda kunoda bepa rakatsetseka zviri pakati nepakati, kutsvedzerera kwepamusoro, kadonhwe kadiki kanoberekana zvakatendeka, asi kudhindwa kwakazara kunofanirwa kungwarira kudzivirira musana kunamira.Kana bepa rakatsetseka rakaderera, inodiwa kudhinda kumanikidzwa yakakura, inki inoshandiswa zvakare yakakura.

6 Dust Degrees

Inoreva kusvibiswa kwepamusoro pemavara emapepa, ruvara uye ruvara rwepepa pane musiyano wakajeka.Hupfu dhigirii chiyero chetsvina iri pabepa, inotaridzwa nenhamba yenzvimbo dzeguruva mune imwe siyana pamativi emamita enzvimbo yemapepa.Guruva remapepa rakakwirira, inki yekudhinda, dot reproduction effect haina kunaka, mavara ane tsvina anokanganisa kunaka kwechigadzirwa.

7 Sizing Degree

Kazhinji pepa repamusoro pepepa rekunyora, pepa rekuputira uye pepa rekurongedza rinoumbwa nekuisa saizi yekudzivirira nekudzivirira mvura.Maitiro ekuisa saizi, inowanzoshandiswa dhadha chinyoreso chakanyikwa mune yakakosha chiyero inki mumasekonzi mashoma, dhirowa mutsara pabepa, ona hupamhi hwepamusoro hwekusawanda kwayo, kusapinda, iyo unit iri mm.Pepa pamusoro saizi yakakwira, kudhinda inki layer kupenya kwakakwira, kushoma inki kushandiswa.

8 Kusazvidzora

Iko kugona kwebepa kutora inki.Kupfava, kuyera bepa rakanaka, kunyudza inki haina simba, inki layer yakaoma inononoka, uye iri nyore kunamira yakasviba kudhinda.Pane zvinopesana, inki inotorwa yakasimba, kudhinda kuri nyore kuoma.

9 Pashure

Iyo inoreva iyo pepa fiber sangano kuronga gwara.Mukugadzira bepa, iyo fiber inomhanya ichitevedza longitudinal nzira yemuchina wepepa.Inogona kuzivikanwa nekupinza kweAngle yemambure mamaki.Yakatwasuka kune yakatwasuka inochinjika.Iko deformation kukosha kwe longitudinal bepa zviyo kudhinda idiki.Mukuita kwekuchinjika kwepepa zviyo kudhindwa, shanduko yekuwedzera yakakura, uye simba rekusimba uye dhigirii rekubvarura hazvina kunaka.

10 Mwero Wekuwedzera

Inoreva bepa mukunyura kana kurasikirwa nehunyoro mushure mehukuru hwekusiyana.Iyo yakapfava iyo fiber tissue yepepa, iyo yakaderera kusimba, iyo yakakwirira yekuwedzera kwebepa;Zvakasiyana, iyo yakaderera mwero wekuyera.Mukuwedzera, kutsvedzerera, saizi yakanaka bepa, kuwedzera kwayo mwero idiki.Zvakadai sepepa rakavharwa-mativi maviri, kadhi regirazi uye A offset bepa, nezvimwe.

11 Porosity

Kazhinji, iyo yakaonda uye isina kusimba pepa, iyo inowedzera kufema ichava.Chiyero chekugona kufema i ml/min(milliliter paminiti) kana s/100ml(yechipiri /100ml), zvinoreva huwandu hwemweya wakapfuura nepabepa muminiti imwe kana nguva inodiwa kuti upfuure nepakati pe100ml yemhepo.Iro bepa rine mhepo yakakura kupinda mukati rinowanzoita kaviri kukweva bepa mukudhinda.

12 White Degree

Inoreva kupenya kwebepa, kana chiedza chese chichiratidzwa kubva pabepa, ziso rakashama rinogona kuona kuti rakachena.Kutsunga kwekuchena kwepepa, kazhinji kuchena kwe magnesium oxide ndeye 100% seyero, tora sampu yepepa neblue light irradiation, kuchena kwediki reflectivity kwakaipa.Photoelectric whiteness mita inogonawo kushandiswa kuyera kuchena.Iwo mayunitsi ekuchena ari 11 muzana.Pepa jena repamusoro, inki yekudhinda inoita yakasviba, uye iri nyore kugadzira kuburikidza nechiitiko.

13 Mberi uye Kumashure

Mukugadzira mapepa, pulp inoumbwa nekusefa uye kupera mvura mumuviri nekunamatira kune mesh yesimbi.Nenzira iyi, serutivi rwemambure nekuda kwekurasikirwa kwemafibers akanaka uye mafiritsi nemvura, saka uchisiya mambure mamakisi, iyo pepa yepamusoro inokora.Uye rumwe rutivi rusina mambure rwakanaka.Smooth, kuitira kuti bepa riite mutsauko pakati pemativi maviri, kunyange kugadzirwa kwekuomeswa, kumanikidza chiedza, kuchine misiyano pakati pemativi maviri.Kupenya kwepepa kwakasiyana, iyo inobata zvakananga kubatwa kweinki uye kunaka kwezvigadzirwa zvekudhinda.Kana iyo letterpress process ichishandisa mapepa ekudhinda ane gobvu kumashure, kupfeka ndiro kuchawedzerwa zvakanyanya.Kumberi kwepepa rekudhinda kudzvinyirira kwakareruka, inki inoshandiswa ishoma.