2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Fiber lossis fiber (los ntawm Latin: fibra) yog natural lossis man-made substance uas ntev dua li qhov dav. Fibers feem ntau yog siv rau hauv kev tsim khoom ntawm lwm cov ntaub ntawv. Cov khoom siv hluav taws xob muaj zog tshaj plaws feem ntau suav nrog cov fibers, piv txwv li carbon fiber thiab ultra-high-molecular-weight polyethylene.
Puas ntev fibers ntuj?
Muaj rau hom fibers ntuj siv rau cov khoom siv fiber ntau ntev, uas tuaj yeem faib los ntawm hom botanical, namely bast, nplooj, noob, tub ntxhais, nyom thiab lwm yam zoo li ntoo thiab hauv paus fibers. Flax, hemp, sisal thiab jute fibers feem ntau yog siv los txhawb LNFC (Fig. 1.4).
Cov fibers twg yog tib neeg tsim?
Manmade fibers yog tsim los ntawm ntau yam tshuaj, los yog regenerated los ntawm cov nroj tsuag fibers. Piv txwv ntawm manmade fibers yog: polyester; polyamide (nylon); acrylics; viscose, ua los ntawm cov tawv ntoo; Kevlar, fiber ntau ua haujlwm; thiab Nomex, ib qho kev ua tau zoo fiber ntau.
Natural fibers thiab txiv neej ua Fibres yog dab tsi?
Natural fibers yog fibers ua los ntawm ntuj. Cov piv txwv zoo yog paj rwb thiab ntaub plaub, uas feem ntau yog siv hauv cov khaub ncaws textile tab sis muaj ntau ntau cov fibers ntuj tsim nyob rau hauv me me xws li piv txwv li. txhob lo lo ntxhuav, flax los yog hemp. Man-made fibers (MMF) yog cov fibers ua los ntawm tib neeg. MMF tuaj yeem yog cov organic lossis inorganic.
YYuav ua li cas fiber ntau yog ntuj Fiber?
Piv txwv ntawmNatural Fibers
Nyob zoo fibers tau los ntawm lub nceeg vaj cog muaj xws li paj rwb, flax, hemp, xyoob, sisal, thiab jute. Lawv lub ntsiab tseem ceeb yog cellulose. Los ntawm cov tsiaj, peb tau txais cov fibers nrov xws li wool, silk, angora, thiab mohair.
Pom zoo:
Puas yog cov neeg tsim khoom lossis cov neeg siv khoom?
Daim duab qhia txog lub luag haujlwm tseem ceeb uas microbes xws li algae, cyanobacteria thiab cov decomposers, ua si thawj cov tsim khoomthiab hauv kev caij tsheb kauj vab. Puas yog cov microbes tsim lossis cov neeg siv khoom? Tab sis ntau yam kab mob tsis yog neeg tsim khoom thiab ua tsis tau lawv tus kheej cov zaub mov.
Puas yog lo lus cov khoom siv feem ntau lossis ntau tshaj?
Cov khoom siv tuaj yeem suav tau lossis suav tsis tau. Feem ntau, feem ntau siv, cov ntsiab lus, ntau daim ntawv yuav kuj yog cov khoom siv. Txawm li cas los xij, hauv cov ntsiab lus tshwj xeeb, daim ntawv ntau ntau kuj tuaj yeem yog cov ntaub ntawv xws li.
Puas yog cov tib neeg ntawm ib hom niaj hnub no txawv dua li cov tib neeg ntawm tib hom?
Puas yog cov tib neeg ntawm ib hom niaj hnub no zoo li txawv dua li cov tib neeg ntawm tib hom tau ntau tiam dhau los? … Yog, txhua tus neeg tuaj yeem hloov pauv me ntsis thiab dhau qhov kev hloov pauv rau lawv cov xeeb ntxwv. Puas muaj qhov sib txawv ntawm cov tib neeg ntawm tib hom?
Puas yog cov txiaj ntsig tshwj xeeb - feem ntau cov khoom tsis yog nyiaj - rau cov thawj coj?
phiaj xwm txhawb nqa lub koom haum tuaj yeem siv cov tswv cuab hauv lub koom haum los muab nqi zog rau cov neeg ua haujlwm. … Yog tias tus nqi lag luam ntawm cov khoom lag luam tshaj tus nqi siv zog, cov neeg ua haujlwm tuaj yeem siv qhov kev xaiv thiab yuav cov Tshuag.
Puas yog cov nroj tsuag carnivorous yog cov tsim khoom lossis cov neeg siv khoom?
As producers, cov nroj tsuag tsim lub hauv paus ntawm yuav luag txhua cov khoom noj hauv ntiaj teb. Carnivorous nroj tsuag zoo li "tig rooj" thaum lawv ua raws li cov neeg siv khoom, gobbling kab, qav, thiab cov tsiaj me me. Puas yog Venus flytrap yog tus neeg siv khoom thiab tsim khoom?
