Dab tsi yog yam uas cuam tshuam rau qhov nplaum ntawm pur hot melt adhesives?

   Pur kub meltadhesivesmuaj cov khoom sib txawv pasting hauv ntau daim ntawv thov. Yog tias purhot melt adhesive xav siv nws qhov kev ua tau zoo tshaj plaws ntawm cov nplaum, nws yog qhov tsim nyog kom nkag siab txog nws cov yam ntxwv tseem ceeb, thiab muaj kev nkag siab tag nrho ntawm qhov pib viscosity thiab viscosity ntev. Niaj hnub no peb yuav piav qhia txog ntau yam uas cuam tshuam rau pur kub yaj nplaum:

1. Xim:

Rau pur kub-kua nplaum nplaum, cov xim sib txawv muaj qhov sib txawv, thiab cov nplaum daj yog zoo dua nyob rau hauv ntau cov xim.Yog tias siv cov kua nplaum xim tsis muaj kev cuam tshuam rau cov khoom sib txuas, nws raug nquahu kom xaiv cov xim daj pur kub yaj kua nplaum, cov nyhuv paste yog qhov zoo heev.

2. Kub:

Pur kub yaj nplaum nplaum yog heev rhiab heev totemperature. Thaum qhov kub ncav cuag lub melting point, lub nplaum pib soften. Thaum qhov kub thiab txias tshaj qhov kub ntawm qhov kev siv, thepur kub yaj nplaum yuav ua nkig, uas yuav cuam tshuam rau kev sib txuas lus. Kev ua haujlwm kub ntawm pur hot-melt nplaum yog qis dua li ntawm EVA kub-melt nplaum, yog li pur kub-melt nplaum tshuab yuav tsum nruj me ntsis tswj qhov kub thiab txias ntawm txhua cov kua nplaum thaum ua haujlwm, thiab tseem yuav tsum tau ua tib zoo xav txog qhov kev hloov ntawm ib puag ncig kub.

3. Lub sijhawm kho:

Cov neeg niaj hnub no muaj lub sijhawm muaj zog heev, thiab cov neeg siv khoom zoo ib yam. Tom qab tso qhov kev txiav txim, lawv txhua tus cia siab tias lawv tuaj yeem xa tuaj rau lawv tus kheej sai li sai tau. Qhov no xav kom cov tuam txhab ua tiav nrog kev tsim khoom siab. Kev ua nrawm nrawm yog qhov sib txawv.Lub zog ntawm pur kub yaj nplaum yog tias nws lub sijhawm kho yog qhov luv luv piv nrog lwm cov nplaum, feem ntau yog li 6-20 vib nas this. Txawm li cas los xij, yog tias ua tau raws li kev ua haujlwm ntau dhau lawm, lub sijhawm kho tsis txaus yuav tseem cuam tshuam rau kev sib txuas lus.

4. Viscosity:

Lub viscosity ntawm pur kub yaj nplaum yog muab faib ua thawj viscosity thiab tuav viscosity. Thawj viscosity qhia txog viscosity ntawm cov nplaum, thiab tuav viscosity sawv cev rau lub zog nplaum ntawm cov nplaum. Feem ntau nws yog qhov zoo dua los xaiv cov nplaum nplaum. Nws yog ncaj qha ntsig txog. Yog tias qhov pib adhesion tsis zoo, tsis tas yuav tham txog qhov tuav viscosity nyob rau tom qab. Thawj viscosity muaj kev sib raug zoo nrog rau ib puag ncig uas cov nplaum nyob.