Kugula zinthu zonyamula katundu | Momwe mungasankhire zinthu zapaipi zapulasitiki zapamwamba kwambiri

Kusankhidwa ndi khalidwe la zipangizo ndizofunika kwambiri pakuonetsetsa kuti ma hoses ali abwino, omwe angakhudze mwachindunji kukonza ndi kugwiritsa ntchito komaliza kwa hoses. Zida zamapaipi apulasitiki zimaphatikizapo polyethylene (kwa thupi la chubu ndi mutu wa chubu), polypropylene (chivundikiro cha chubu), masterbatch, utomoni wotchinga, inki yosindikizira, varnish, etc. Choncho, kusankha kwa zinthu zilizonse kudzakhudza kwambiri khalidwe la payipi. Komabe, kusankha kwa zipangizo kumadaliranso zinthu monga ukhondo zofunika, zotchinga katundu (zofunika mpweya, nthunzi madzi, kusunga fungo kusungirako, etc.), ndi kukana mankhwala.

Kusankhidwa kwa mapaipi: Choyamba, zida zomwe zimagwiritsidwa ntchito ziyenera kukwaniritsa miyezo yoyenera yaukhondo, ndipo zinthu zovulaza monga zitsulo zolemera ndi zopangira fulorosenti ziyenera kuyendetsedwa mkati mwazomwe zalembedwa. Mwachitsanzo, pamapaipi omwe amatumizidwa ku United States, polyethylene (PE) ndi polypropylene (PP) zomwe zimagwiritsidwa ntchito ziyenera kukwaniritsa muyeso wa US Food and Drug Administration (FDA) 21CFR117.1520.

Zolepheretsa zazinthu: Ngati zomwe zili m'mapaketi amakampani opanga mankhwala atsiku ndi tsiku ndi zinthu zomwe zimakhudzidwa kwambiri ndi mpweya (monga zodzoladzola zina zoyera) kapena kununkhira kwake kumakhala kosasunthika (monga mafuta ofunikira kapena mafuta ena, ma acid, mchere ndi zina). mankhwala ena owononga), machubu opangidwa ndi zigawo zisanu ayenera kugwiritsidwa ntchito panthawiyi. Chifukwa mpweya permeability wa asanu wosanjikiza co-extruded chubu (polyethylene / zomatira utomoni / EVOH / zomatira utomoni / polyethylene) ndi 0.2-1.2 mayunitsi, pamene mpweya permeability wa wamba polyethylene wosanjikiza chubu ndi 150-300 mayunitsi. Nthawi zina, kuchuluka kwa kuwonda kwa chubu chopangidwa ndi ethanol kumakhala kotsika kambirimbiri kuposa chubu chagawo limodzi. Kuphatikiza apo, EVOH ndi ethylene-vinyl alcohol copolymer yokhala ndi zotchinga zabwino kwambiri komanso kusunga kununkhira (kukhuthala kwa ma microns 15-20 ndikoyenera kwambiri).

Kuuma kwazinthu: Makampani opanga mankhwala atsiku ndi tsiku amakhala ndi zofunikira zosiyanasiyana pakuuma kwa ma hoses, ndiye kuti angapeze bwanji kuuma komwe kumafunikira? Polyethylene yomwe imagwiritsidwa ntchito kwambiri m'mapaipi ndi polyethylene yotsika kwambiri, polyethylene yolimba kwambiri, komanso polyethylene yocheperako pang'ono. Pakati pawo, kuuma kwa polyethylene yapamwamba kwambiri ndi yabwino kuposa ya polyethylene yotsika kwambiri, kotero kuti kuuma komwe kumafunidwa kungapezeke mwa kusintha chiŵerengero cha polyethylene / low-density polyethylene.

Kukaniza kwamankhwala: Polyethylene yolimba kwambiri imakhala ndi kukana kwamankhwala kuposa polyethylene yotsika kwambiri.

Kukana kwa Nyengo: Kuwongolera magwiridwe antchito kwakanthawi kapena kwakanthawi kwa payipi, zinthu monga mawonekedwe, kukana kupanikizika / kutsika, mphamvu yosindikiza, kukana kupsinjika kwachilengedwe (mtengo wa ESCR), kununkhira ndi kutayika kwa zinthu zomwe zimagwira zimafunikira. kuganiziridwa.

Kusankhidwa kwa masterbatch: Masterbatch imagwira ntchito yofunikira pakuwongolera kwabwino kwa payipi. Chifukwa chake, posankha masterbatch, kampani yogwiritsa ntchito iyenera kuganizira ngati ili ndi dispersibility yabwino, kusefera komanso kukhazikika kwamafuta, kukana kwanyengo komanso kukana kwazinthu. Pakati pawo, kukana kwa masterbatch ndikofunikira kwambiri pakugwiritsa ntchito payipi. Ngati masterbatch sagwirizana ndi mankhwala, mtundu wa masterbatch udzasamukira ku mankhwala, ndipo zotsatira zake zimakhala zovuta kwambiri. Chifukwa chake, makampani opanga mankhwala atsiku ndi tsiku amayenera kuyesa kukhazikika kwa zinthu zatsopano ndi ma hoses (mayeso othamanga pansi pamikhalidwe yodziwika).

Mitundu ya varnish ndi mawonekedwe ake: Varnish yomwe imagwiritsidwa ntchito mu payipi imagawidwa mu mtundu wa UV ndi mtundu wowumitsa kutentha, ndipo imatha kugawidwa kukhala yowala pamwamba ndi matte pamwamba potengera mawonekedwe. Varnish sikuti imangopereka zowoneka bwino, komanso imateteza zomwe zili mkati mwake ndipo imakhala ndi zotsatira zina zotsekereza mpweya, mpweya wamadzi ndi kununkhira. Nthawi zambiri, varnish yowumitsa kutentha imakhala yomatira bwino pakupondaponda kotsatira ndi kusindikiza pazithunzi za silika, pomwe varnish ya UV imakhala yowala bwino. Makampani opanga mankhwala a tsiku ndi tsiku amatha kusankha varnish yoyenera malinga ndi mawonekedwe azinthu zawo. Kuphatikiza apo, varnish yochiritsidwa iyenera kukhala yomatira bwino, yosalala pamwamba popanda pitting, kukana kupindika, kukana kuvala, kukana dzimbiri, komanso kusasintha kwamtundu panthawi yosungira.

Zofunikira pamutu wa chubu / mutu wa chubu: 1. Pamwamba pa thupi la chubu liyenera kukhala losalala, lopanda mikwingwirima, zokopa, zovuta, kapena kuwonongeka kwa shrinkage. Thupi la chubu liyenera kukhala lolunjika osati kupindika. Makulidwe a khoma la chubu ayenera kukhala ofanana. Makulidwe a khoma la chubu, kutalika kwa chubu, ndi kulolerana kwake ziyenera kukhala mkati mwazomwe zafotokozedwa;

2. Mutu wa chubu ndi thupi la chubu la payipi liyenera kulumikizidwa mwamphamvu, mzere wolumikizira uyenera kukhala wabwino komanso wokongola, ndipo m'lifupi uyenera kukhala wofanana. Mutu wa chubu sayenera kupotozedwa pambuyo polumikizana; 3. Mutu wa chubu ndi chivundikiro cha chubu ziyenera kugwirizana bwino, kuwombera mkati ndi kunja bwino, ndipo pasakhale kutsetsereka mkati mwazitsulo zomwe zatchulidwa, ndipo pasakhale madzi kapena mpweya wotuluka pakati pa chubu ndi chivundikirocho;

Zofunikira zosindikiza: Kukonza payipi nthawi zambiri kumagwiritsa ntchito kusindikiza kwa lithographic offset (OFFSET), ndipo inki yambiri yomwe imagwiritsidwa ntchito ndi UV-zouma, zomwe nthawi zambiri zimafuna kumamatira mwamphamvu komanso kukana kusinthika. Mtundu wosindikiza uyenera kukhala mkati mwa kuya kwake komwe kwatchulidwa, malo opitilira muyeso ayenera kukhala olondola, kupatuka kukhale mkati mwa 0.2mm, ndipo fontyo ikhale yathunthu komanso yomveka bwino.

Zofunikira pazipewa zapulasitiki: Zovala zapulasitiki nthawi zambiri zimapangidwa ndi jekeseni wa polypropylene (PP). Zovala zapulasitiki zapamwamba siziyenera kukhala ndi mizere yowoneka bwino yocheperako komanso yonyezimira, mizere yosalala ya nkhungu, miyeso yolondola, komanso yosalala ndi mutu wa chubu. Sayenera kuwononga kapangidwe kake monga ming'alu ya brittle kapena ming'alu pakagwiritsidwe ntchito bwino. Mwachitsanzo, mphamvu yotsegulira ikakhala pakati pawo, chipewacho chiyenera kupirira mapindikidwe oposa 300 popanda kusweka.