Ndechipi chiri nani, PUR inopisa inonyunguduka adhesive kana EVA inopisa inonyungudutsa adhesive?

1. PUR(Polyurethane Reactive), zita rakazara nderokunyorova-kuporesa reactive polyurethane inopisa kunyunguduka adhesive, chikamu chikuru isocyanate-terminated polyurethane prepolymer, imwe-chikamu, 100% yakasimba yemukati. the

2. Zvimiro: PUR inopisa inonyunguduka yakanamatira, inogadziriswa adhesion uye kuoma (elasticity), yakanakisa kusungirira simba, yakanaka yakakwirira uye yakaderera tembiricha kuramba, kudzivirira kwemvura, abrasion resistance, zero chemical corrosion resistance and resistance Kuchembera kuramba, kwakakodzera kusungirirwa kwepurasitiki nesimbi. , inoshandiswa zvakanyanya mumagetsi, mota, machira, electromechanical, aerospace uye mamwe minda yenyika hupfumi. the

3. Polyurethane inopisa-yakanyunguduka adhesive type: PUR inopisa-yakanyunguduka yakanamatira (imwe-chikamu chinyoro-inoporesa polyurethane adhesive), iyo imwe yemhando dzepolyurethane inopisa-yakanyunguduka. Zvinoenderana nemishonga yemakemikari, kune marudzi maviri e polyurethane inopisa inonyunguduka adhesives: imwe ndeye thermoplastic polyurethane inopisa inonyunguduka adhesive, uye imwe iri reactive polyurethane inopisa melt adhesive. the

Thermoplastic polyurethane inopisa inonyungudutsa adhesive, inozivikanwawo sehot melt polyurethane inopisa inonyunguduka inonamira, inonyungudutswa nekudziya uye kusimbiswa nekutonhodza. Reactive polyurethane inopisa melt adhesives yakakamurwa kuita mhando mbiri: mwando kurapa mhando uye yakavharwa mhando. Mushure mekunyungudutswa nekudziisa, zvinosanganiswa uye kusimbiswa nekutonhodza uye kuita mwando. Iyo PUR inopisa inonyunguduka inonamira yakaunzwa nhasi inoreva mwando kurapa polyurethane inopisa inonyungudutsa adhesive.

2. Rection mechanism

Imwe-chikamu chemvura inorapa polyurethane adhesive inogadzirwa neiyo terminal-NCO-yakavakirwa prepolymer seyakadzika zvinhu, ine thermoplastic resins, tackifying resins, antioxidants, catalysts, mafirita uye zvimwe zvinowedzera zvisingaite nemapoka isocyanate. PUR glue inopisa uye yakanyungudutswa mumvura, yakaputirwa pamusoro peiyo substrate kuti ibatirwe, maviri anonamatira anonamirwa pamwechete, uye chisungo chinoumbwa mushure mekutonhora. Iyo inoshanda yehydrogen compound inopindirana neboka reNCO kuti riwedzere ketani kuti iite polymer ine muchinjiko-yakabatana chimiro uye yakakwirira kubatana, iyo inowedzera kuwedzera kunamatira. Iro -NCO boka mu isocyanate iri nyore kwazvo kuita nekomboni ine inoshanda haidrojeni.

3. Musiyano pakati pePUR hot melt adhesive uye EVA inopisa inonyunguduka adhesive:

1. Kuumbwa kwakasiyana. PUR inopisa inonyunguduka inonamatira ndeye polyurethane, uye EVA inotora ethylene-vinyl acetate;

2. The reaction mechanism yakasiyana. PUR inopisa melt adhesive inorapwa nehunyoro uye haidzokerike mushure mekuita; EVA ndeyekubatana kwemuviri, inoomesa mushure mekutonhora, inogona kunyungudutswazve mushure mekupisa, uye oparesheni inodzoreredzwa. the

3. PUR inopisa yakanyunguduka yakanamatira haigadziriswi mushure mekuporesa, ine simba rakakwirira uye yakakwirira uye yakaderera kupisa kwekushisa, kupisa kwekushisa, kutonhora kunotonhora, kupikisa kwemvura, kushandiswa kwemakemikari uye kusagadzikana kwekugadzirisa. Kuomarara kweEVA hot melt adhesive kunenge kwakashata, uye nzvimbo yekunyorovesa yakadzikira pane yePUR polyester, mazhinji ayo ari kutenderera 100 ° C, iyo inodzikamisa yayo yekushandisa.

Kana zviri izvo zviri mukati zvinobatsira iwe kana kambani yako, isu tine zvakawanda zve purking zvigadzirwa zve pur hot-melt adhesive, eva inopisa-yakanyunguduka inonamira, inopisa-inonyungudika inonamira uye mamwe maitiro ekugadzira.Welcome to consult, uye isu tichagadzirisawo zvaunofarira iwe. Iyo inonyanya kukodzera uye yakachipa inopisa melt adhesive