Mataira anonamira anoita basa rakakosha muindasitiri yekuvaka, achipa akasimba uye akanaka mhinduro dzekunamatira mataira kune akasiyana enzvimbo. Kubudirira kwematairi ekunamira kunoenderana zvakanyanya nezviri mukati mezviwoko zvekuwedzera, izvo redispersible mapolymers uye cellulose ndiyo miviri mikuru yezvigadzirwa.
1. Redispersible polymers:
1.1 Tsanangudzo uye zvivakwa:
Redispersible polymers zviwedzere zvehupfu zvinowanikwa nekupfapfaidza kuomesa polymer emulsions kana dispersions. Aya mapolymers anowanzo akavakirwa pavinyl acetate, ethylene, acrylics kana mamwe macopolymers. Iyo fomu yehupfu iri nyore kubata uye inogona kuiswa mumatairi adhesive formulations.
1.2 Wedzera kunamatira:
Redispersible polymers inovandudza zvakanyanya kunamatira kwematairi ekunamira kune akasiyana ma substrates. Iyo polima inoomesa kuita firimu rinochinjika, rinonamira rinogadzira chisungo chakasimba pakati pekunamira uye tile uye substrate. Uku kunamatira kwakakwidziridzwa kwakakosha pakuita kuti hurefu uye kugadzikana kweiyo tile pamusoro.
1.3 Kuchinjika uye kusagadzikana kwekupwanya:
Kuwedzerwa kweiyo redispersible polymer inopa tile inonamira kuchinjika, ichibvumira kuti ienderane nekufamba kweiyo substrate pasina kuputika. Uku kuchinjika kunonyanya kukosha munzvimbo umo tembiricha inoshanduka kana shanduko yemaitiro inogona kuitika, kudzivirira kuumbwa kwekutsemuka kunogona kukanganisa kutendeseka kweiyo tile.
1.4 Kuramba kwemvura:
Redispersible mapolymers anobatsira mukupokana kwemvura kwematairi anonamira. Iyo firimu yepolymer inoumba sezvainooma inoita sechivharo, ichidzivirira mvura kubva pakupinda uye nekudaro ichidzivirira chisungo. Izvi zvinonyanya kukosha munzvimbo dzine hunyoro dzakadai sedzimba dzekugezera uye makicheni, uko hunyoro hunowedzera.
1.5 Kuvaka uye maawa ekuvhura:
Iyo rheological zvimiro zveadhispersible mapolymers anoita basa rakakosha mukuita kwekushandisa kwematairi anonamira. Ivo vanobatsira kuchengetedza kuenderana kwakaringana uye kuve nechokwadi chekushandisa kuri nyore. Uye zvakare, iyo redispersible polymer inobatsira kuwedzera yakavhurika nguva yekunamira, ichipa vanoisa nguva yakakwana yekugadzirisa mataira pamberi peanonamatira seti.
2. Cellulose:
2.1 Tsanangudzo nemhando:
Cellulose ipolymer yechisikigo inotorwa kubva kumadziro maseru ezvirimwa uye inowanzoshandiswa sechinhu chinowedzera mumataira anonamira. Cellulose ethers, senge methylcellulose (MC) uye hydroxyethylcellulose (HEC), inowanzoshandiswa nekuda kwekunaka kwekuchengetedza mvura uye kukora zvinhu.
2.2 Kuchengeta mvura:
Rimwe remabasa ekutanga e cellulose mumatairi adhesive kugona kwayo kuchengetedza mvura. Iyi ficha inowedzera yakavhurika nguva yekunamatira, nekudaro ichiwedzera processability. Kana cellulose ikatora mvura, inoumba gel-sechimiro chinodzivirira chinonamira kubva pakuoma nekukasira panguva yekushandisa.
2.3 Kuvandudza processability uye sag kuramba:
Cellulose inovandudza kushanda kweiyo inonamira mataira nekudzivirira sagging panguva yakatwasuka application. Iko kukora mhedzisiro ye cellulose inobatsira kunamira kuchengetedza chimiro chayo pamadziro, kuve nechokwadi chekuti mataira anonamatira zvakaenzana pasina kudonha.
2.4 Deredza kuderera:
Cellulose inogona kuderedza shrinkage yekunamatira tile panguva yekuomesa. Izvi zvakakosha nekuti shrinkage yakawandisa inogona kukonzeresa kuumbwa kwevoids uye kuputika, kukanganisa kutendeseka kwese kwechisungo.
2.5 Mhedzisiro pakusimba kwesimba:
Mataira anonamira ane cellulose kuwedzera simba rawo rekusimba. Izvi zvinonyanya kukosha munzvimbo dziri pasi pemitoro inorema kana kudzvinyirirwa, sezvo inobatsira pakugara kwese uye kushanda kwe tile pamusoro.
3. Synergistic mhedzisiro yeredispersible polymer uye cellulose:
3.1 Kuenderana:
Redispersible mapolymers uye cellulose anowanzo kusarudzwa kuti aenderane kune mumwe nemumwe uye zvimwe zvinongedzo mune tile yekunamira yekugadzira. Uku kuwirirana kunovimbisa homogeneous musanganiswa iyo inowedzera mabhenefiti ega ega ekuwedzera.
3.2 Mubatanidzwa wekubatana:
Iko kusanganiswa kwe redispersible polymer uye cellulose inoburitsa synergistic mhedzisiro pakubatana. Mafirimu anochinjika akaumbwa kubva kumapolymeri anodispersible anoenderana nekuchengetedza mvura uye kukora zvimiro zve cellulose, zvichikonzera kunamira kwakasimba, kusimba uye kushanda.
3.3 Kuwedzera kuita:
Iyo redispersible polymer uye cellulose pamwe chete inovandudza kuita kwese kweiyo inonamira mataira, ichipa kunamira kuri nani, kuchinjika, kuramba kwemvura, kugadzirisa uye kusimba. Uku kusanganiswa kunonyanya kubatsira uye kwakakosha mumashandisirwo anoda kuvimbika uye kwenguva refu kubatana.
Kubatanidza redispersible polymers uye cellulose mumatairi anonamira idanho uye rakapupurirwa maitiro muindasitiri yekuvaka. Izvi zvinowedzera zvinotora basa rakakosha mukusimudzira kunamatira, kuchinjika, kuramba kwemvura, kugadzirisa uye kusimba kwenguva refu. Iko kuwirirana pakati pemapolymers anodhindwa zvakare uye cellulose inoguma mune yakaringana adhesive mafomati anozadzisa zvinodiwa zvinodiwa zvemazuva ano ekuvaka mapurojekiti. Sezvo tekinoroji uye kutsvagisa kuri kuramba kuchienderera mberi, humwe hutsva munzvimbo yekunamira mataira hunotarisirwa kuitika, nekuenderera mberi kwekusimbisa pakugadzirisa mashandiro uye kusimba kweizvi zvakakosha zvekuvaka.
Nguva yekutumira: Zvita-26-2023