Yenziwa njani i-phenol formaldehyde resin?

I-Bakelite yi-phenolic resin.I-Phenolic resin (PF) luhlobo lweemveliso zeplastiki zeshishini.Izinto eziluhlaza zemveliso ye-phenolic resin ikakhulu i-phenol kunye ne-aldehyde, kunye ne-phenol kunye ne-formaldehyde zisetyenziswa ngokuqhelekileyo.Ziyi-polymerized nge-condensation reaction phantsi kwe-catalysis ye-asidi, isiseko kunye nezinye ii-catalysts.Kukho iintlobo ezimbini zemveliso yoshishino: inkqubo eyomileyo kunye nenkqubo emanzi.

Ngaphantsi kwesenzo se-catalysts ezahlukeneyo, i-phenol kunye ne-aldehyde inokuvelisa iindidi ezimbini ze-phenolic resins: enye i-thermoplastic phenolic resin, enye i-thermosetting phenolic resin.Eyangaphambili inokunyangwa kwisakhiwo sebhloko ngokongeza i-ejenti yokunyanga kunye nokufudumeza, ngelixa le yokugqibela inokunyangwa kwisakhiwo sebhloko ngokufudumeza ngaphandle kokongeza i-arhente yokunyanga.

I-Thermoplastic phenolic resin kunye ne-thermosetting phenolic resin ingasetyenziswa kuphela ngenethiwekhi yokutshintshiselana eyenziwe ngokuphilisa.Inkqubo yokunyanga kukuqhubela phambili kwe-polycondensation yemilo kunye nokwakhiwa kweemveliso zemilo.Le nkqubo ihluke ekunyibilikeni kunye nokunyangwa kwe-thermoplastics jikelele.Zombini iinkqubo zomzimba kunye neekhemikhali azinakuguqulwa.

I-Phenolic resin inokubunjwa ngendlela efanayo ne-thermoplastic.PF yokubumba inalitiifuna ubumanzi obulungileyo, inokubunjwa phantsi koxinzelelo lwenaliti ephantsi, ukuqina okuphezulu kwe-thermal, isantya sokuqina ngokukhawuleza, isicwebezelisi esilungileyo samalungu eplastiki, ukudilizwa ngokulula, kwaye akukho ngcoliseko lokungunda.Nangona kunjalo, ukubumba inaliti nako kuneengxaki zako.Ngokomzekelo, ukunyibilika kukhawulelwe luhlobo lokuzalisa, ngoko akufanelekile ukusebenzisa ukufakwa okungaphezulu ukwenza iinxalenye zeplastiki.Inani elikhulu lamasango kunye nemijelo ayinakuphinda isetyenziswe emva kokunyanga, kwaye inokulahlwa kuphela.

Ngelizwi, i-thermoplastic phenolic resin inokuveliswa ngumatshini wokubumba oqhelekileyo, kodwa iimeko zenkqubo zilawulwa ngokungqongqo.I-Thermosetting phenolic resin kufuneka iveliswe ngumatshini wokubumba okhethekileyo wenaliti ye-phenolic resin, kwaye i-mold iphinda ithathe isakhiwo esikhethekileyo soyilo.

Isetyenziswa ngokubanzi kwiizixhobo zombane, iziseko, iziphatho zezibane,amaqokobhe omatshini wesandwich, njl.Nangona kunjalo, ukusebenza kwayo okuethe-ethe kunye nenkqubo yokucinezela ingxaki kunokunciphisa uphuhliso lwayo.Ngokuvela kwezinye iiplastiki, iimveliso ze-bakelite akulula ukuzibona ngoku.Nangona iimveliso ze-bakelite kufuneka zifudunyezwe ukubumba, ixesha lokucubungula lide kuneeplastiki eziqhelekileyo, kwaye i-mold igugile inkulu, efuna iimfuno eziphezulu zentsimbi, kodwa ngenxa yendawo yayo enenzuzo kwixabiso lezinto eziluhlaza. isethathe indawo yamalungu amaninzi eplastiki.