Qhov tseem ceeb rau txoj haujlwm no yog cov ntaub ntawv raw khoom thiab cov khoom siv tshwjxeeb. Dimer acid based polyamide cov ntaub ntawv, zoo dua lub npe hu ua hot-melts, yog siv raws li moulding compounds. Lawv yog cov thermoplastics xws li cov khoom, thaum rhuab, yuav tsis tshua khov thiab muaj peev xwm rov ua dua, ces ua kom daim ntawv xav kom txias thaum tso txias. Cov ntaub ntawv no txawv los ntawm lwm cov thermoplastics hauv ob qhov tseem ceeb: Ib qho: Viscosity: Thaum ua ntsuas kub (410F / 210C) lub siab tawv heev, feem ntau ntawm 3,000 centipoise (zoo li pancake phoov). Cov ntaub ntawv uas tsis muaj viscosity yuav tsum tsis muaj kev txhaj tshuaj tiv thaiv kom txhob hno mus ua kab noj hniav. Qhov tseeb nws yog siv cov iav yooj yim twj los hno cov khoom siv rau cov khoom siv polyamide. Tsawg tshuaj siab yog qhov tseem ceeb, thaum dhau-molding kuj tawg taus hluav taws xob. Ob: Kev Adhesion: Cov khoom siv tawm hauv Polyamide cov ntaub ntawv muaj peev txheej kub heev. Lub nplaum cov khoom ntawm polyamide yog dab tsi seals ib tug xaiv substrate. Lub hom ntawm adhesion yog purely mechanical ie tsis muaj tshuaj lom neeg cov tshuaj tiv thaiv qhov chaw.
Tsawg Siab Molding (LPM) nrog polyamide thiab polyolefin (kub-yaj) cov ntaub ntawv
May 07, 2018
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