Mitundu itatu ya polypropylene, kapena copolymer mwachisawawachitoliro cha polypropylene, imatchulidwa ndi chidule cha PPR. Izi zimagwiritsa ntchito kuwotcherera kutentha, zili ndi zida zapadera zowotcherera ndi zodulira, komanso zimakhala ndi pulasitiki wapamwamba. Mtengo wake ndi wololera. Pamene chiwombankhanga chikuwonjezedwa, ntchito yotsekemera imakhala bwino ndipo khoma la chitoliro, kupatulapo malumikizano pakati pa mawaya amkati ndi akunja, ndi osalala kwambiri.

Amagwiritsidwa ntchito m'mapaipi oyikidwa kale m'zitsime zakuya kapena makoma ophatikizidwa.Mtengo wa PPRali ndi moyo wautumiki mpaka zaka 50, ndi mtengo wokwanira, wosasunthika pakugwira ntchito, wosasunthika kutentha ndi kuteteza kutentha, kugonjetsedwa ndi dzimbiri, yosalala komanso yopanda makulitsidwe pakhoma lamkati, otetezeka komanso odalirika mu dongosolo la mapaipi. Pofuna kutsimikizira chitetezo cha dongosololi, zipangizo zamakono ndi ogwira ntchito oyenerera amafunikira pomanga, omwe ali ndi zofunikira zamakono.

Maonekedwe ofatsa, ofananira - m'malo mosintha mawu opezeka m'mapaipi ena amadzi - amaperekaPP-R madzi chitolirombali yosangalatsa ndi mtundu. (Makasitomala nthawi zambiri amaganiza kuti zoyera ndiye mtundu wabwino kwambiri wa mapaipi a PP-R, koma mtundu siwoyimira pakuweruza; mtundu wa mapaipi amadzi a PP-R ndi wosiyana ndi mapaipi a PP-R, komanso mtundu wamadzi. pipe ilibe kanthu (palinso mitundu ina yomwe yawonjezeredwa ndi mtundu wa masterbatch). choncho, ndizosafunikira mtundu wa chitoliro chamadzi.

Nthawi zambiri, zida zoyera za PP-R zokha zitha kugwiritsidwa ntchito kupanga zinthu zoyera. Mwachitsanzo, pamene mitundu ina yopangidwa ndi ma masterbatches amitundu imaphatikizidwa ndi zinthu zobwezerezedwanso, zinyalala, ndi zida zamakona, mtundu wazinthu zopangidwa powonjezera zinthu zobwezerezedwanso, zotayira, ndi zida zamakona sizofewa komanso zosagwirizana. Mtundu wa mankhwalawo sungakhudzidwe ndi zinthu zomwe zimagwiritsidwa ntchito, ndi zina zotero. Malo amkati ndi akunja a mankhwalawo ayenera kukhala opanda cholakwa ndi ophwanyika; zolakwika monga ming'oma ya mpweya, glaring depressions, grooves, ndi zonyansa sizovomerezeka.

Zida zonse zoyambira zamapaipi abwino amadzi a PP-R ndi PP-R. (popanda zowonjezera). Oyera m'mawonekedwe, okhala ndi malo osalala komanso chogwirira bwino. Mapaipi otsanzira a PP-R amamva bwino. Nthawi zambiri, tinthu tating'onoting'ono timakonda kukhala ndi zonyansa; polypropylene ndiye chigawo chachikulu cha mapaipi PP-R. Mapaipi osakwanira amanunkhiza modabwitsa, pomwe mapaipi abwino samamva fungo. Nthawi zambiri, polyethylene m'malo mwa polypropylene imaphatikizidwa.

Kutentha kwanthawi zonse kwa mapaipi a PP-R ndi pakati pa 260 ndi 290 ° C. Ubwino wa weld udzatsimikiziridwa bwino pa kutentha uku. The mankhwala mosavuta kulowa kuwotcherera kufa mutu pa kuwotcherera ngati magawo kuwotcherera ndi zachilendo. Kuphatikiza apo, tinthu tating'onoting'ono tazinthu timene timatulutsa timakhala tamadzimadzi, zomwe zikuwonetsa kuti sizinapangidwe ndi zida zenizeni za PP-R.

Zogulitsazo sizimapangidwanso kuchokera ku zida zenizeni za PP-R ngati zowotcherera zowunjikira zimatha kuziziritsa ndikulimba mwachangu (nthawi zambiri mkati mwa masekondi 10). Izi ndichifukwa choti PP-R imakhala ndi mphamvu yoteteza kutentha, zomwe zikutanthauza kuti kuzizira kwake kumakhala kocheperako.
Yang'anani kuti muwone ngati zopangira zitoliro zimakokedwa komanso ngati m'mimba mwake mwa chitoliro chasokonekera. Mkatikati mwa chitoliro chabwino cha PP-R sichingakokedwe, ndipo sichimapindika mosavuta.