Koj yuav xav tsis thoob tias cov hnab khib nyiab tau dav siv thoob plaws ntiaj teb thiab tsis yog tshiab.Cov hnab yas ntsuab uas koj pom txhua hnub yog ua los ntawm polyethylene.Lawv tau tsim nyob rau xyoo 1950 los ntawm Harry Washrik thiab nws tus khub, Larry Hansen.Ob tus neeg tsim khoom yog los ntawm Canada.
Dab tsi tshwm sim ua ntej lub hnab khib nyiab?
Ua ntej cov hnab khib nyiab tau muab faib, ntau tus neeg tau faus cov khib nyiab hauv lub xwmfab.Qee cov neeg hlawv cov khib nyiab.Tsis ntev tom qab ntawd, lawv pom tau hais tias kev kub hnyiab thiab kev faus neeg ua rau muaj kev puas tsuaj rau ib puag ncig.Cov hnab khib nyiab pab tib neeg nrog cov khib nyiab zoo dua.
Cov hnab khib nyiab thaum ntxov
Thaum xub thawj, cov hnab khib nyiab tau siv los ua lag luam.Lawv yog thawj zaug siv hauv tsev kho mob Winnipeg.Hansen ua hauj lwm rau union carbide, uas yuav cov invention los ntawm lawv.Lub tuam txhab ua thawj lub hnab khib nyiab ntsuab hauv xyoo 1960 thiab hu lawv lub hnab khib nyiab hauv tsev.
Qhov kev tsim kho tam sim ntawd ua rau muaj kev xav thiab tau siv ntau lub lag luam thiab tsev neeg.Thaum kawg, nws tau los ua ib yam khoom nrov.
Drawstring hnab
Xyoo 1984, keeb kwm ntawm cov hnab khib nyiab nkag mus rau hauv kev ua lag luam, ua kom yooj yim rau cov neeg nqa hnab ntim puv.Tus thawj drawstring yog ua los ntawm high density yas.Cov hnab no ruaj khov thiab muaj zog kaw mechanism.Tab sis cov hnab no kim dua.Drawstring hnab yog nrov nyob rau hauv tsev thiab yooj yim rau nqa, yog li kuv yuav lawv rau tus nqi ntxiv.
Cov phooj ywg ib puag ncig ntawm cov hnab khib nyiab polyethylene yog qhov tsis sib haum xeeb.Xyoo 1971, Dr. James Gillett tau tsim cov yas uas tawg hauv lub hnub.Los ntawm kev tsim khoom, peb tuaj yeem siv cov hnab yas thiab tseem sawv ntawm ib sab ntawm kev tiv thaiv ib puag ncig.Biodegradable hnab twb muaj nyob rau hauv kev ua lag luam hnub no thiab yog siv los ntawm ntau tus neeg.
Post lub sij hawm: Apr-16-2021