Kev faib cov ntawv

Daim ntawv tuaj yeem muab faib ua pawg hauv qab no raws li ntau yam tsis muaj.

Raws li qib: Thawj cov ntawv ua tiav los ntawm cov ntaub ntoo nyoos yog hu uadaim ntawv nkauj xwblos yogvirgin qib ntawv.Cov ntawv siv duayog daim ntawv tau txais tom qab reprocessing ntawm daim ntawv nkauj xwb, siv cov ntaub ntawv pov tseg nws tus kheej los yog lawv ua ke.

Raws li qhov smoothness thiab kev kho mob muab rau cov ntaub so ntswg thiab cov ntawv, nws tau muab faib ua ob pawg: cov ntaub ntawv siv rau kev luam ntawv, sau ntawv, sau ntawv, phau ntawv thiab lwm yam yog ua los ntawm cov ntaub ntawv bleached thiab hu ua.ntawv zoo, thiab ntawv siv rau hauv ntim cov khoom noj uas yog ua los ntawm unbleached pulp yog hu uadaim ntawv ntxhib.

Raws li Food Safety and Standard Authority of India (FSSAI), tsuas yog cov khoom ntim cov khoom siv nkauj xwb yuav tsum tau siv rau kev sib cuag zaub mov ncaj qha (FSSRXyoo 2011).Cov ntawv ntim khoom noj tuaj yeem muab faib ua ob pawg dav (1) raws li kev kho cov ntaub so ntswg los yog ntawv (2) raws li cov duab thiab kev sib xyaw ntawm ntau yam ntaub ntawv.Kev kho cov ntoo ntoo cuam tshuam rau daim ntawv cov khoom thiab nws siv tau zoo heev.Tshooj tom ntej no tham txog ntau hom ntawv raws li kev kho mob ntawm cov ntaub so ntswg thiab cov ntawv thiab lawv siv hauv ntim khoom noj.

Corrugated fiberboard(CFB)

Cov khoom siv raw rau CFB feem ntau yog cov ntawv kraft tab sis agave bagasse, cov khoom lag luam los ntawm kev lag luam tequila kuj tau siv rau cov khoom siv fiberboard (Iñiguez-Covarrubias li al.Xyoo 2001).Corrugated fiberboard feem ntau muaj ob lossis ntau txheej ntawm cov ntaub ntawv tiaj tus (liner) thiab cov txheej txheem ntawm cov khoom siv corrugated (flute) yog sandwiched ntawm cov khaubncaws sab nraud povtseg kom muab cov nyhuv cushioning thiab puas.Fluted cov ntaub ntawv yog tsim los siv corrugator uas muaj feem cuam tshuam nrog cov ntawv tiaj tus kraft ntawm ob lub serrated rollers, ua raws li daim ntawv thov ntawm cov nplaum rau cov lus qhia ntawm corrugations thiab liner yog daig rau cov khoom siv corrugated siv siab (KirwanXyoo 2005).Yog hais tias nws tsuas muaj ib lub liner, nws yog ib phab ntsa;yog lined ntawm ob sab tshaj peb ply lossis ob lub ntsej muag thiab lwm yam.Raws li Bureau of Indian Standards (IS 2771(1) 1990), A (Broad), B (Narrow), C (Medium) thiab E (Micro) flute hom tau raug txhais.Ib hom flutes yog siv thaum cushioning zog yog qhov tseem ceeb, hom B muaj zog dua A thiab C, C yog kev cuam tshuam ntawm cov khoom ntawm A thiab B thiab E yog yooj yim rau quav nrog zoo tshaj plaws printability (IS: SP-7 NBC2016).Kev ntim khoom noj ib leeg siv peb caug-ob feem pua ​​​​ntawm tag nrho cov corrugated board nyob rau hauv cov teb chaws Europe thiab plaub caug feem pua ​​​​yog tias cov ntim ntim dej kuj suav nrog (KirwanXyoo 2005).Nws yog siv rau hauv cov khoom noj khoom haus ncaj nraim rau cov txiv hmab txiv ntoo thiab zaub, qhov twg txhua qib ntawm cov ntawv pov tseg tuaj yeem siv los ua cov txheej txheem sab hauv tab sis qhov kev xav tau ntawm pentachlorophenol (PCP), phthalate thiab benzophenone yuav tsum tau ua tiav.

Cov thawv ntim raws li CFB feem ntau yog siv rau ntau lub khob yogurt khob ntawm polystyrene.Nqaij, ntses, pizza, burgers, khoom noj ceev, qhob cij, nqaij qaib thiab Fabkis fries tuaj yeem ntim rau hauv fiberboards (Begley li al.Xyoo 2005).Txiv hmab txiv ntoo thiab zaub tseem tuaj yeem ntim khoom rau kev lag luam txhua hnub.