Kraft bepa rinogadzirwa kuburikidza nekuita vulcanization, iyo inovimbisa kuti kraft bepa rakanyatsokodzera kushandiswa kwayo. Nekuda kwemwero yakawedzera yekutyora kusimba, kubvarura, uye kusimba kwesimba, pamwe nekudiwa kwekuomarara kwakaderedzwa uye yakanyanya porosity, iyo yepamusoro mhando kraft bepa ine zvakakwirira zvinodikanwa zveruvara, magadzirirwo, kuenderana, uye kukosha kwekunaka.
Kuti isangane neruvara neaesthetic quality mwero, pulp inofanira kucheneswa kuti iwane kupenya kuri pakati pe24% ne34% uku ichichengeta yero uye tsvuku hunhu hwakarongeka, kureva kuchengetedza kusimba kwemuchena.
Kraft mapepa ekugadzira maitiro
Iyo kraft mapepa ekugadzira maitiro anosanganisira anotevera matanho.
1. Kuumbwa kwezvinhu zvakagadzirwa
Chero mhando yekugadzira mapepa yakafanana, inosiyana chete mumhando, ukobvu, uye kuwedzerwa kwemamwe maitiro. Kraft bepa rinogadzirwa kubva kureba fiber huni pulp, uye ine yakakwirira yenyama chiyero chepfuma. Maitiro acho anoburitsa musanganiswa we softwood uye hardwood pulp inosangana nehunyanzvi hwemhando zviyero zve premium kraft bepa. Broadleaf huni pulp accounts inosvika 30% yehuwandu hwekugadzirwa. Iyi mbishi reshiyo haina mhedzisiro pasimba remuviri webepa, asi ine mhedzisiro yakakosha pane gloss uye mamwe maitiro.
2. Kubika uye bleaching
Kraft pulp inofanirwa kunge iine mashoma akaomesesa fiber bundles uye inowirirana ruvara, pamwe nekuzadzisa zvinodikanwa zvemhando yepamusoro yekubikira uye bleaching maitiro. Izvo zvinogamuchirwa zvakanyanya kuti kubika uye kuita bleaching kunosiyana zvakanyanya pakati pehuni samples. Kana iyo pulp line inogona kuparadzanisa softwood uye hardwood pulping, softwood uye hardwood kubika uye bleaching inogona kusarudzwa. Iyi nhanho inoshandisa yakasanganiswa coniferous uye hardwood kubika, pamwe neyakasanganiswa bleaching mushure mekubika. Mukugadzira maitiro, hurema hwemhando senge isingaenderane fiber bundles, coarse fiber bundles, uye isina kugadzikana pulp ruvara zvakajairika.
3.Kudzvanya
Kuvandudza iyo pulping process inhanho yakakosha yekuwedzera kuoma kwekraft bepa. Kazhinji, kuwedzera kudzvanywa kwepurupa uchichengetedza kunaka kwayo uye kuomarara kwakaderera kunodiwa kuti uvandudze kuoma kwepepa, density, uye kufanana.
Kraft bepa rine simba rakakura uye quantifiable zvikanganiso mune vertical uye lateral kutsauka. Nekuda kweizvozvo, yakakodzera pulp kune hupamhi hwepepa reshiyo, screen shaker, uye mawebhu maforms anoshandiswa kuvandudza mamakisi. Nzira yekutsikirira inoshandiswa kugadzira bepa inokanganisa kupinza kwemhepo, kuoma, uye kutsvedzerera. Kutsikirira kunoderedza porosity yepepa, kudzikisa kupera kwayo uye vacuum uku ichiwedzera sealability; inogonawo kuwedzera simba remuviri repepa.
Idzi ndidzo nzira dzinowanzoitwa kraft paper.
Nguva yekutumira: Nov-30-2022