Ngaba udidekile ziimpawu zeplastiki ezikwiikhathalogu zepayipi? Ukukhetha izinto ezingafanelekanga njenge-PP xa ufuna i-PE kunokukhokelela ekusileleni kwenkqubo kunye nokutshintshwa okubiza kakhulu.

I-PP imele iPolypropylene. Yipolymer eqinileyo, eqinileyo, nehlala ixesha elide kakhulu. Kwihlabathi leepayipi, idume ngokumelana kwayo nobushushu kunye neekhemikhali ezahlukeneyo, nto leyo eyenza ukuba ibe sisisombululi seengxaki kwiimfuno zoshishino.

Apha ePntek, sikholelwa ekusebenziseni izinto ezifanelekileyo kumsebenzi ofanelekileyo.I-Polypropyleneayisiyonto nje yeplastiki; sisisombululo esikhethekileyo. Kwingcali yecandelo lokubonelela ngempahla efana noCarlos, ukuqonda lo mahluko kubalulekile. Xa enokuchazela umthengi wemizi-mveliso ukuba kutheni i-PP ilukhetho lodwa kuboumgca wenkunkuma yeekhemikhali, akathengisi nje imveliso; ubonelela ngesisombululo esikhuselekileyo nesihlala ixesha elide esikhusela imisebenzi yabo.

Yintoni ipayipi yePP?

Ngaba ucinga ukuba zonke iipayipi zeplastiki eziqinileyo ziyafana? Le ngcinga iyingozi xa usebenza ngamaqondo obushushu aphezulu okanye ulwelo olubolayo, apho umbhobho oqhelekileyo unokonakala ngokukhawuleza kwaye wonakale.

Umbhobho we-PP ngumbhobho othe tye noqinileyo owenziwe ngePolypropylene. Iimpawu zayo ezicacileyo kubushushu obuphezulu kakhulu bokusebenza xa kuthelekiswa ne-PVC kunye ne-PE, kunye nokumelana okuphezulu kwii-asidi, ii-alkalis, kunye nezinye iikhemikhali ezirhabaxa. Lukhetho olufanelekileyo kwiizicelo ezinzima.

Ndihambe kwizityalo zeekhemikhali apho umoya ngokwawo uvakala ngathi uyatsha. Kwezo ndawo, udinga izinto onokuzithemba ngokupheleleyo.Umbhobho wePPyiloo nto. Kubathengi bakaCarlos ekwenzeni okanye ekucubunguleni, ukuthembeka kombhobho wePP kuthetha ukhuseleko lokusebenza kunye nokuphepha ukuvuza okubi. Yimveliso ekumgangatho ophezulu kwizicelo apho ukusilela kungelulo ukhetho. Yiyo loo nto sigxininisa kwiiresini ezikumgangatho ophezulu kwiinkqubo zethu zePP.

Ayizizo zonke iiPP ezifanayo

Ukuze ukhethe umbhobho we-PP ofanelekileyo, kufuneka wazi ngeentlobo zawo ezahlukeneyo. Iintlobo ezintathu eziphambili oza kudibana nazo zenzelwe imisebenzi eyahlukileyo kancinci.

• I-PP-H (iHomopolymer):
  Olu lolona hlobo lwe-PP luqinileyo. Lunamandla aphezulu obushushu kunye nokumelana okuhle kweekhemikhali. Uza kuyifumana ikakhulu kwizityalo zokucubungula iikhemikhali kunye nemizi-mveliso.
• I-PP-B (iBloko yeCopolymer):
  Olu hlobo lunezongezo ezenza ukuba luqine kakhulu kwaye lukwazi ukumelana neempembelelo, ingakumbi kumaqondo obushushu aphantsi. Lulungele imibhobho yenkunkuma yemizi-mveliso enokungqubana.
• I-PP-R (i-Copolymer engacwangciswanga):
  Le yeyona iguquguqukayo kwezi zintathu kwaye yeyona isemgangathweni wokufaka amanzi ashushu nabandayo kwizakhiwo. Ilungile kakhulu ekuphatheni uxinzelelo ixesha elide kumaqondo obushushu aphezulu.

Kumphathi wokuthenga, kubalulekile ukwazi ukuba loluphi uhlobo oluza kugcinwa kulo. UCarlos usenokugcina i-PP-R kubathengi bakhe abathengisa imibhobho kunye ne-PP-H kubathengi bakhe bemizi-mveliso.

Isetyenziselwa ntoni i-PP?

Ngaba usebenzisa umbhobho oqhelekileyo kumsebenzi othile nonzima? Oku kungafani kukhokelela ekuvuzeni, ekungcolisweni kolwelo, nasekungasebenzi kakuhle kwenkqubo. Udinga isixhobo esikhethekileyo.

Umbhobho we-PP usetyenziswa kwiindawo ezishushu kakhulu okanye ezirhabaxa kakhulu kwiiplastiki eziqhelekileyo ezifana ne-PVC. Eyona ndlela isetyenziswa ngayo kukuthutha iikhemikhali kwimizi-mveliso, ukuhambisa amanzi amdaka elebhu, izityalo zokucoca amanzi amdaka, kunye nemijelo yamanzi ashushu nabandayo kwizakhiwo (ngakumbi i-PP-R).

Izicelo ze-PP zikubonisa ngqo apho amandla ayo akhoyo. Sakha sabonelela ngeprojekthi yesityalo esikhulu sokulungisa ukutya. Babefuna ukuthutha ulwelo lokucoca olushushu, olune-asidi encinci. I-PVC ngeyayithambile, kwaye isinyithi ngeyayibolile. I-PP yayisisombululo esigqibeleleyo nesihlala ixesha elide. Xa uCarlos ekwazi ukukhomba ezi meko zokusetyenziswa ezithile, unceda abathengi bakhe babone ixabiso kwaye baphephe ukwenza impazamo ebiza kakhulu.

Iindawo eziphambili zokusetyenziswa

I-PP ikhanya apho ezinye izinto zinzima khona. Ukudibana kwayo okungaqhelekanga kweempawu kuyenza ibe lukhetho olufanelekileyo kumacandelo aliqela aphambili.

Ishishini/Usetyenziso	Kutheni i-PP isetyenziswa
Imigca yeekhemikhali zoshishino	Ingathutha ngokukhuselekileyo uluhlu olubanzi lwee-asidi, ii-alkali, kunye nenkunkuma yemizi-mveliso ngaphandle kokubola okanye ukubola.
Iipayipi zamanzi ashushu (PP-R)	Iyakwazi ukumelana namaqondo obushushu bamanzi ukuya kuthi ga kwi-90°C (194°F) rhoqo kwaye ayiniki ncasa okanye ivumba emanzini okusela.
Unyango lwamanzi amdaka	Ayinazo iikhemikhali ezidityanisiweyo ezifumaneka kumanzi amdaka emizi-mveliso nakamasipala, nto leyo eqinisekisa ukuba isebenza ixesha elide kwaye ithembekile.
Iilebhu kunye nezeMpilo	Isetyenziselwa iinkqubo zokukhupha amanzi ezifuna ukusingatha iintlobo ngeentlobo zeekhemikhali ezingafunekiyo zivuze okanye zonakale ngokuhamba kwexesha.

Ukuqonda ezi zicelo kunceda uCarlos kunye neqela lakhe lokuthengisa ukuba bachonge abathengi abaneengxaki ezinokusonjululwa yi-PP pipe kuphela.

Ngaba i-PP inamandla kune-PVC?

Ngaba ukhetha i-PVC ngokuzenzekelayo kuba ixhaphake kakhulu? Oku kungaba yimpazamo enkulu xa inkqubo yakho ibandakanya ubushushu okanye iikhemikhali ezithile, nto leyo ekhokelela ekuqhumeni kwemibhobho kunye nokuvuza okuyingozi.

Kuxhomekeke kwindlela ochaza ngayo "ukuqina." Kwiqondo lobushushu begumbi, i-PVC iqinile ngakumbi. Nangona kunjalo, i-PP ingcono kakhulu kwiindawo ezimbini ezibalulekileyo: inokumelana namaqondo obushushu aphezulu kakhulu, kwaye inamandla angcono okuchukumisa, nto leyo ethetha ukuba ayinakuqhekeka xa itshayiswa.

Lo ngumbuzo endiwuvayo rhoqo. Impendulo ayikuko ukuba ngowuphi ongcono ngokubanzi, kodwa ngowuphi ofanelekileyo kwimeko ethile. Ngumsebenzi wam ukuqinisekisa ukuba amaqabane ethu, njengoCarlos, analo olu lwazi. Xa umthengi embuza lo mbuzo, akanakuphendula ngokuthi “ewe” okanye “hayi” nje, kodwa ngeengcebiso zobungcali ezimnceda ukuba akhethe umbhobho ofanelekileyo, ezakha udumo lwakhe njengomthengisi othembekileyo.

Uthelekiso lwentloko nentloko

Uphawu	I-PP (iPolypropylene)	I-PVC (iPolyvinyl Chloride)
Ubushushu Obuphezulu	Ibalasele kakhulu, malunga nama-90°C (194°F)	Imbi kakhulu, iqondo lobushushu limalunga nama-60°C kuphela (140°F)
Ukumelana neekhemikhali	Igqwesile, ingakumbi kwiiasidi kunye neziseko.	Kulungile, kodwa kunokonakala ziikhemikhali ezithile ezifana nezinyibilikisi.
Amandla empembelelo	Ilungile kakhulu. Iqinile kwaye ayinakuqhekeka.	Ilungile. Iqinile kakhulu kwaye inokuba buthathaka.
Indlela yokujoyina	I-Heat Fusion (ukuwelda). Yenza i-joint ehlala ihleli, engenamthungo.	Isamente yesinyibilikisi (iglu) okanye iigasket.
Ixabiso	Ixabiso lokuqala liphezulu ngombhobho/ukufakelwa.	Ixabiso lokuqala eliphantsi.

Ngoko ke, kumgca wokunkcenkceshela ngamanzi abandayo, i-PVC lukhetho oluhle nolungabizi kakhulu. Kodwa kumgca wamanzi ashushu kumzi-mveliso okanye kumbhobho wamakhemikhali kwilebhu, i-PP lolona khetho lukhuselekileyo noluthembekileyo. Ixabiso elongezelelweyo likunika ukhuseleko kunye nobomi benkonzo obude.

Ungazidibanisa njani iipayipi zePP?

Ngaba ukhathazekile ukuba iindawo ezikwinkqubo yakho yepayipi ziya kuba yindawo yokuqala apho kuvela khona ukuvuza? Ngepayipi yePP, ukusebenzisa iglu okanye ii-mechanical clamps yindlela yokulungisa ingxaki.

Imibhobho yePP idityaniswa kusetyenziswa i-heat fusion welding. Le nkqubo isebenzisa isixhobo esikhethekileyo ukunyibilikisa umphezulu wombhobho kunye ne-fitting, ezithi emva koko zityhalelwe kunye. Njengoko zipholile, zidibana zibe yiplastiki enye, ehlala ihleli, kwaye ingavuzi.

Ijoyinti yeyona nxalenye ibalulekileyo kuyo nayiphi na inkqubo yepayipi. Indlela yokudibanisa ubushushu esetyenziswa kwi-PP, ngokoluvo lwam, yeyona nxibelelwano inokuthenjwa kangangoko. Isusa ubuthathaka beglue ezinokonakala okanye izitywina zoomatshini ezinokukhululeka. Kubathengi bakaCarlos abaqeshwayo, oku kuthetha uxolo lwengqondo. Bangafaka inkqubo ye-PP, bayivavanye, baze bazi ukuba iijoyinti ziqinile kwaye zihlala ixesha elide njengepayipi ngokwayo.

Iindlela ezimbini eziphambili zokudibanisa

Kukho iindlela ezimbini eziphambili zokuwelda i-PP, kwaye leyo uyisebenzisayo ixhomekeke kubukhulu bombhobho.

• I-Socket Fusion:
  Le yeyona ndlela ixhaphakileyo kwiipayipi ezincinci ezinobubanzi obuncinci, ngesiqhelo ukuya kuthi ga kwi-125mm (malunga ne-intshi ezi-4). Isixhobo esikhethekileyo sokufudumeza sinecala lendoda nelebhinqa. Sifudumeza umphandle wesiphelo sepayipi kunye nangaphakathi kwesokhethi yokufakela ngaxeshanye. Emva koko ususa isixhobo kwaye utyhale umbhobho ungene kwi-fitting. Kwenza ijoyinti eqinileyo nebukeka icocekile.
• Ukuhlanganiswa Kweempundu:
  Kwimibhobho emikhulu, le yindlela eqhelekileyo. Iziphelo zesikwere zemibhobho emibini (okanye umbhobho kunye nesixhobo sokudibanisa) zibanjwa kumatshini omkhulu. Ipleyiti yokufudumeza ibekwa phakathi kwazo, inyibilikisa iziphelo zombini. Ipleyiti iyasuswa, kwaye umatshini ucinezela iziphelo ezinyibilikisiweyo kunye, okwenza intsimbi eqinileyo ejikeleze ngaphandle kombhobho. Le ndlela idala ingaphakathi eligudileyo ngokugqibeleleyo, elilungele ukuhamba kwamanzi.

Zombini ezi ndlela zenza ilungu elihlala lihleli elingazukuvuza.

Isiphelo

I-PP, okanye iPolypropylene, ngumbhobho okhethekileyo wokusetyenziswa kobushushu obuphezulu kunye neekhemikhali. Inamandla kune-PVC kwezi meko kwaye idityaniswe nokudibana kobushushu okungapheliyo, okudala inkqubo ethembekileyo kakhulu.