Global - Premier PVA: Polymer ya Khwalithi ya le Henhla ya Switirhisiwa swo Hambana
Tinsimu Letikulu ta Xikombelo
PVA yitirhisiwa ngopfu eka bindzu ra swiambalo. Yitirha tani hi sizing agent ya ti yarns, yi antswisa matimba ya tona xikan’we naku olova loko ti luka. Leswi swi pfuneta ku hunguta ku tshoveka naku tlakusa khwalithi hinkwayo ya lapi. Endzhaku ka endlelo ro luka, PVA yinga susiwa hiku olova hiku hlantswiwa, leswi siyaka lapi rina swivumbeko swa rona swosungula. Ku engetela kwalano, PVA yitirhisiwa eka vuhumelerisi bya swifunengeto swa swiambalo na swinamarheti, leswi nyikaka ku namarhela kahle xikan’we naku tiya.
Eka bindzu ra maphepha, PVA yitirhisiwa tani hi surface sizing agent xikan’we na binder. Tanihi xiaki xa vukulu bya le henhla, yi antswisa ku tiya ka mati, ku tiya na ku kandziyisiwa ka phepha. Yi endla filimi yo olova, leyi nga erivaleni ehenhla ka phepha, yi sivela inki ku hangalaka naswona yi antswisa ku vonakala ka swifaniso leswi kandziyisiweke. Tanihi binder, PVA yitirhisiwa eka vuhumelerisi bya maphepha lawa ya pfanganisiweke na paperboard, ku ndlandlamuxa ku namarhela exikarhi ka coating layer na substrate, xikan’we naku antswisa matimba hinkwawo xikan’we naku tiya ka switirhisiwa swa maphepha.
PVA nakambe i nchumu wa nkoka eka bindzu ra swinamarheti. Yina swivumbeko swa kahle swinene swo namarhela, ngopfu ngopfu eka switirhisiwa leswinga na ti porous swofana na mapulanga, maphepha, na swiambalo. Ti adhesives leti sekeriweke eka PVA - ti n’oka ematini, ta olova ku ti tirhisa, naswona tina matimba ya kahle yo boha. Ti tirhisiwa ngopfu eka tiindasitiri to aka, fanichara ni ku paka leswaku ti boha swilo swo hambana-hambana. Ku engetela kwalano, swinamarheti swa PVA swinga cinciwa na swiengeteri swin’wana kuva swi antswisa ku tiya ka swona eka kuhisa, ku tiya ka mati, na swin’wana ku fikelela swilaveko swokarhi swaku tirhisiwa.
Eka ntirho wa swifunengeto, PVA yitirhisiwa tani hi film - forming agent. Yi endla filimi leyi vonakaka, leyi olovaka, naswona yinga ngheniwiki hi mati ehenhla ka nchumu lowu pfanganisiweke, leswi nyikaka nsirhelelo eka ndzhongho, tikhemikhali, na UV radiation. PVA - based coatings yitirhisiwa ngopfu eka nsirhelelo wa mapulanga, nsimbi, na plastiki. Tinga tlhela titirhisiwa tani hi primer kumbe intermediate coating ku antswisa ku namarhela na matirhelo ya top - coat.
Swihlawulekisi swa kona
| Vito ra Xiendliwa | Byala bya Polyvinyl | |||||||||
| Fomula ya Tikhemikhali | (C2H4O)n | |||||||||
| Ndzilo wa Molekhuli | 30,000–150,000 wa g/mol | |||||||||
| Xivumbeko | Powder yo basa kumbe granule | |||||||||
| Ndhawu yo N’oka | 230–240°C ya xiyimo xa le henhla | |||||||||
| Rendzo | 1,26–1,31 g/cm3 | |||||||||
| CAS NO | 9002-89-5 | |||||||||
| Khodi ya HS | 39053000 | |||||||||
| EINECS NO | 209-183-3 | |||||||||
| Xikombelo | Yi tirhisiwa eka swinamarheti, swiambalo, swifunengeto swa maphepha na tifilimi | |||||||||
Xiphephana xa Vulawuri bya Khwalithi
| Vito ra Xiendliwa | Byala bya Polyvinyl | ||||||
| NCHUMU | NKOKA WA XIYIMO XA LE HENHLA (%) . | NKOKA WA XIKAMBELANTWISISO (%) . | |||||
| Digiri ya Vuhlayiselo bya Byala%(mol/mol) . | 86,5～88.0 | 86. | |||||
| Ku tsindziyela ka mPa·s | 45.0～55.0 | 48. | |||||
| Vuxokoxoko lebyi nga cinciki | ≤5 | 3. 3. | |||||
| Nhlayo ya Nsinya% . | ≤0 | 0 | |||||
| Nhlayo ya pH | 5.0.0 | 5.0.0 | |||||
| Particle Size yikulu kutlula 10mesh | - . | 2. 2. | |||||
| Vukulu bya Particle byintsongo kutlula 60mesh | - . | 2. 2. | |||||
Hi ku komisa
PVA ya hina ya Global - Premier yi kumeka hi tigiredi to hambana na swivumbeko, ku katsa na ti powder, ti granules, na swintshuxo, ku fikelela swilaveko swo karhi swa tiindasitiri to hambana. Giredi yin’wana na yin’wana ya PVA yina swihlawulekisi swokarhi swofana na viscosity, degree ya polymerization, na degree ya alcoholysis, leswinga endliwaka kuya hi swilaveko swa vaxavi. Switirhisiwa swa hina swa PVA swi pakiwa eka ku pakiwa loku nga ngheniwiki hi ndzhongho na ku nghenisiwa ka moya ku tiyisisa khwalithi ya swona na ku tshamiseka hi nkarhi wa ku hlayisiwa na ku fambisiwa. Kunga khathariseki leswaku u muendli wa swiambalo eAsia, xigayo xa maphepha eYuropa, muhumelerisi wa swinamarheti eAmerika N’walungu, kumbe khamphani yo peta eAmerika Dzonga, Global - Premier PVA ya hina i polymer leyi tshembekaka na khwalithi ya le henhla leyi nga ku pfunaka ku antswisa matirhelo na khwalithi ya switirhisiwa swa wena.