Hanyar gwaji don dankowar foda mai sake tarwatsewa

A halin yanzu, da yadu amfani redispersible latex powders a duniya sun hada da vinyl acetate da ethylene copolymer foda, ethylene, vinyl chloride da vinyl laurate ternary copolymer foda, vinyl acetate, ethylene da mafi girma fatty acid vinyl ester ternary copolymer foda. Foda, waɗannan nau'ikan nau'ikan polymer foda guda uku sun mamaye kasuwa duka, musamman vinyl acetate da ethylene copolymer foda VAC / E, wanda ke mamaye babban matsayi a fagen duniya kuma yana wakiltar halayen fasaha na foda polymer foda. Har yanzu mafi kyawun mafita na fasaha dangane da ƙwarewar fasaha tare da polymers da aka yi amfani da su don gyaran turmi:

1. Yana daya daga cikin polymers da aka fi amfani da su a duniya;

2. Kwarewar aikace-aikacen a fagen gini shine mafi girma;

3. Yana iya saduwa da rheological Properties da ake bukata da turmi (wato, da ake bukata constructability);

4. Gudun polymer tare da sauran monomers yana da halaye na ƙananan kwayoyin halitta marasa lahani (VOC) da ƙananan iskar gas;

5. Yana da halaye na kyakkyawan juriya na UV, tsayayyar zafi mai kyau da kwanciyar hankali na dogon lokaci;

6. Babban juriya ga saponification;

7. Yana da mafi fadi da gilashin canjin zafin jiki (Tg);

8. Yana da in mun gwada da kyau kwarai m bonding, sassauci da inji Properties;

9. Samun kwarewa mafi tsawo a cikin samar da sinadarai na yadda za a samar da samfurori masu inganci da kwarewa wajen kiyaye kwanciyar hankali;

10. Yana da sauƙin haɗuwa tare da colloid mai karewa (alcohol polyvinyl) tare da babban aiki.

Hanyar gano ƙarfin haɗin gwiwa na redispersible latex foda an kwatanta shi a cikin cewa hanyar ƙaddara ita ce kamar haka:

1. Da farko, sai a dauko 5g na foda mai sake sakewa sannan a saka a cikin kofin gilashin gilashin, sannan a zuba 10g na ruwa mai tsafta sannan a jujjuya shi na tsawon mintuna 2 don ya hade.

2. Sa'an nan kuma bari cakudaccen gwangwani ya tsaya na minti 3, sa'an nan kuma ya sake motsawa na minti 2;

3. Sa'an nan kuma yi amfani da duk bayani a cikin ma'auni a kan farantin gilashi mai tsabta wanda aka sanya a kwance;

4. Sanya farantin gilashin a cikin ɗakin gwajin ƙarancin yanayin zafi na DW100;

5. A ƙarshe, sanya shi a ƙarƙashin yanayin kwaikwaiyo na muhalli na 0 ° C na awa 1, fitar da farantin gilashin, gwada ƙimar ƙirar fim, da ƙididdige ƙarfin haɗin gwiwa na redispersible latex foda da ake amfani da shi bisa ga ƙimar samar da fim. .