Masikimachira asina kurukwa, ayo ari machira asina kurukwa kusiyana nemachira emachira, uye anoumbwa neshinda dzakanangana kana kuti dzisina kurongeka.
Masiki ekurapa anowanzo kuve maumbirwo ane machira akawanda, anowanzozivikanwa seSMS structures (2 S uye 1 M layers). Parizvino, huwandu hwakanyanya hwema layers muChina i5, kureva SMMMS (2 S layers uye 3 M layers).
Chii chinonzi SMS?
Pano, S inomiririra Spunbond layer. Dhayamita yefaibha yakakora zvishoma, inosvika 20 microns (m). Basa guru re2 S Spunbond layers nderekutsigira chimiro chose chejira risina kurukwa, iro risina simba guru pakudzivirira. Chikamu chakakosha chemasiki i barrier layer kana Meltblown layer M (Meltblown layer). Dhayamita ye molten spray layer yakatetepa zvishoma, inosvika 2 microns (M), saka inongova chikamu chimwe mugumi chedhayamita ye spunbonding layer, iyo inoita basa rakakosha mukudzivirira mabhakitiriya uye kupinda kweropa.
Masiki ekurapa anowanzo shandisa jira rekupfapfaidza rinorema magiramu makumi maviri, masiki eN95 kapu anoshandisa jira rekupfapfaidza rinorema magiramu makumi mana kana kupfuura.
Zvichienderana nehuwandu hweChina Industrial Textile Industry Association, pakupera kwa2018, kune mitsetse yekugadzira yemukati ine mabhondi 1,477, 65 yakawanda kupfuura yegore rapfuura, nekuwedzera kwegore negore kwe4.6%, pakati payo, mutsetse wekugadzira wePP spunbonded non-wovens wakawedzerwa ne3.38%, mutsetse wekugadzira weSMS composite neanenge 13%, uye mutsetse wekugadzira wePET spunbonded non-wovens ne9.32%. Huwandu hwemakambani ane goho regore rinodarika matani 50,000 hwakawedzerawo kubva muna 2017. Makambani ane mabhondi ari kukurumidzisa budiriro yawo kusvika pakukura, kusimba uye kukwirira kuti asangane nezvinodiwa nemusika zvekuvandudza zvigadzirwa uye kusimudzira tekinoroji.
Kubva muna 2018, mabhizinesi mazhinji emuno akagadzira zvigadzirwa zvavo nenzira yakareruka, yakatetepa uye yepamusoro, uye akawana mhedzisiro yakanaka. Maitiro eSSMMS spunbonded/molten shotcreting composite anoshanda nekukurumidza 600m/min kana kupfuura; Zvigadzirwa zvemhando yepamusoro zvinosvika gumi magiramu pa square meter zviri kuramba zvichibuda.
Machira asina kurukwa eSMS anobva kupi?
Machira asina kurukwa eSMSZvinonyanya kugadzirwa ne polypropylene PP (ine hunhu hwebhakitiriya hwechisikigo uye hydrophobicity), uye dhayamita yefibers inogona kusvika 0.5-10 microns. Idzi fibers dzakapfava zvikuru dzine capillarity yakasiyana dzinowedzera huwandu nenzvimbo yepamusoro yefibers pachikamu chimwe nechimwe, nokudaro zvichiita kuti machira akanyungudutswa ave nehunhu hwakanaka hwekusefa mhepo, zvichiita kuti ave chinhu chakanaka chemasiki.
Parizvino, kune nzira nhatu huru dzekugadzira zvigadzirwa zveSMS (SMS non-woven fabric): "one-step process", "two-step process" uye "one-half-step process".
Danho rimwe chete ndiro kushandiswa kwechikamu chezvinhu zvakagadziriswa mukuita uku, uchishandisa tekinoroji mbiri dzakapwanywa, dzakanyungudutswa, dzakatenderedzwa zvakananga mushure mekunyungudutswa mumambure, chero bedzi kurongeka kwakanaka kwemaitiro akasiyana ekugadzira masisitimu ekutenderera, uye kunogona kugadzira zvigadzirwa zvine chimiro chakasiyana, jira rega rega rakagadziriswa laminated composite, rinowanzo kuve nekubatanidzwa kwemuchina unopisa unomonereka kuita jira. "Nzira imwe chete" inoratidzwa nekunyungudutswa zvakananga kupinda mumambure, mamiriro ehurongwa hwega hwega hwekutenderera anogona kugadziriswa ega, maitiro ekugadzira ekudzora kwakasimba, mamiriro ehutano hwakanaka, kumhanya kwakanyanya, inogona kugadzirisa chikamu chega rega re fiber net, inogona kugadzira zvigadzirwa zvemhando yeSMS zvemhando dzakasiyana, ndiyo tekinoroji huru nhasi.
Maitiro ematanho maviri: Paunenge uchishandisa maitiro ematanho maviri kugadzira zvigadzirwa zveSMS, zvigadzirwa zvakapedzwa zvejira rakapwanywa nejira rakapfapfaidzwa zvinovhurwa nenzira yakati, uye zvobva zvaiswa laminated nenzira imwe chete, zvobva zvabatanidzwa nechinhu chinopisa, zvobatanidzwa kuita zvigadzirwa zveSMS. Nzira yematanho maviri inoratidzwa nemidziyo iri nyore uye mutengo wakaderera. Kutaura zvazviri, maitiro e "matanho maviri" ndiyo tekinoroji inoshandiswa zvakanyanya yelamination composite, asi inogonawo kusanganiswa nezvimwe zvinhu, nezvimwe zvinhu zvakasiyana, uye nenzira dzakasiyana, dzakadai se ultrasonic, hot melt adhesive, zvikamu zvitatu zvezvinhu pamwe chete.
Nzira yedanho rimwe nehafu: nenzira yematanho maviri, zvinokwanisikawo kutsiva chigadzirwa chejira rekupfapfaidza rakanyungudutswa nefiber net yakanyungudutswa inogadzirwa mumunda, nokudaro kunobva kwagadzirwa nzira inonzi "nzira yehafu yedanho rimwe". Jira rakaputswa rinoshandiswa sechikamu chezasi nechikamu chepamusoro nemidziyo miviri yekusunungura, uye fiber net yekupfapfaidza yakanyungudutswa yechikamu chepakati inopoteredzwa zvakananga mumbure nesystem yekupfapfaidza yakanyungudutswa, inoiswa pachikamu chezasi chejira rakaputswa, uye yozofukidzwa nechikamu chepamusoro chejira rakaputswa, zviri nani kushandisa chigayo chinopisa chakabatanidzwa kuita zvigadzirwa zveSMS.
Nguva yekutumira: Gunyana-14-2020