Menene asarar da ƙarancin ingancin chlorinated polyethylene CPE ke haifarwa a cikin sarrafa PVC

Chlorinated polyethylene (CPE) samfuri ne na chlorinated gyare-gyare na polyethylene mai girma (HDPE). A matsayin mai gyara kayan aiki don PVC, abun ciki na chlorine na CPE yakamata ya kasance tsakanin 35-38%. Saboda kyakkyawan juriya na yanayi, juriya na sanyi, juriya na harshen wuta, juriyar mai, juriya mai tasiri (CPE shine elastomer), da kwanciyar hankali na sinadarai.

Chlorinated polyethylene (CPE) samfuri ne na chlorinated gyare-gyare na polyethylene mai girma (HDPE). A matsayin mai gyara kayan aiki don PVC, abun ciki na chlorine na CPE yakamata ya kasance tsakanin 35-38%. Saboda yanayin juriya mai kyau, juriya mai sanyi, juriya na harshen wuta, juriya mai, juriya mai tasiri (CPE shine elastomer), da kwanciyar hankali na sinadarai, kazalika da dacewarsa mai kyau tare da PVC, CPE ya zama mafi yawan amfani da tasirin toughening modifier a cikin PVC. sarrafawa.

1. Tsarin kwayoyin halitta na HDPE
Saboda yanayi daban-daban na tsari yayin amsawar polymerization na PE, akwai wasu bambance-bambance a cikin tsarin kwayoyin halitta da kaddarorin sa na polymer HDPE. Kaddarorin CPE bayan chlorination na HDPE tare da kaddarorin daban-daban kuma sun bambanta. Dole ne masana'antun CPE su zaɓi resins na musamman na HDPE masu dacewa don samar da resin CPE masu dacewa.

2. Yanayin chlorination, watau tsarin chlorination
CPE, azaman mai gyara kayan sarrafa PVC, yawanci ana samuwa ta hanyar chlorination dauki ta hanyar amfani da hanyar dakatar da ruwa mai ruwa. Maɓallin yanayin wannan tsari na chlorination shine makamashin haske, adadin mai farawa, matsa lamba, zafin amsawa, lokacin amsawa, da yanayin amsawa. Ka'idar chlorination na PE abu ne mai sauƙi, amma tsarin chlorination ya fi rikitarwa.

Saboda ƙaramin jarin da aka saka a cikin kayan aiki don samar da CPE, yawancin ƙananan masana'antar samar da CPE sun riga sun warwatse a cikin Sin. Wannan ba wai kawai yana haifar da gurɓatawa ga yanayin muhalli ba, har ma yana ɗaya daga cikin mahimman dalilai na rashin kwanciyar hankali na ingancin CPE.

A halin yanzu, akwai babban adadin ƙananan CPE a kasuwa. Gabaɗaya, akwai nau'ikan ƙananan CPE masu ƙarancin inganci. Ɗayan shine saboda wasu tsire-tsire masu samarwa ba su da yanayin fasaha da kuma matakan chlorination na zamani. Wata hanya ita ce haɗuwa da wani adadin calcium carbonate ko talc foda a cikin CPE don shiga cikin gasa mara kyau.