{"id":2046,"date":"2022-10-22T05:26:09","date_gmt":"2022-10-22T05:26:09","guid":{"rendered":"http:\/\/hpmc.ae\/?p=2046"},"modified":"2022-10-22T05:36:26","modified_gmt":"2022-10-22T05:36:26","slug":"hpmc-for-gypsum-putty","status":"publish","type":"post","link":"https:\/\/hpmc.ae\/sk\/hpmc-for-gypsum-putty\/","title":{"rendered":"HPMC na sadrov\u00fa omietku"},"content":{"rendered":"
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HPMC (Hydroxypropyl Methyl Cellulose) zohr\u00e1va d\u00f4le\u017eit\u00fa \u00falohu pri formul\u00e1cii sadrov\u00e9ho tmelu. Pom\u00e1ha vytvori\u0165 hladk\u00fd, pru\u017en\u00fd tmel, s ktor\u00fdm je \u013eahk\u00e9 pracova\u0165. V tomto \u010dl\u00e1nku sa dozviete, pre\u010do je potrebn\u00e9 prid\u00e1va\u0165 HPMC do v\u00e1\u0161ho tmelu. Mnoh\u00e9 z v\u00fdhod, ktor\u00e9 v\u00e1m tento pr\u00edsada poskytuje, n\u00e1jdete ni\u017e\u0161ie. \u010co [\u2026]<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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\u010co je HPMC?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Predt\u00fdm ne\u017e za\u010dneme, pozrime sa stru\u010dne na to, \u010do je HPMC.
Hypromel\u00f3za (INN), skratka HPMC (Hydroxypropyl methylcellul\u00f3za)<\/strong>((https:\/\/en.wikipedia.org\/wiki\/Hypromellose<\/a>)), je druh nei\u00f3novej celul\u00f3zovej zmie\u0161anej \u00e9terovej l\u00e1tky. Hotov\u00fd produkt je biely pr\u00e1\u0161ok a jeho ve\u013ekos\u0165 \u010dast\u00edc prech\u00e1dza sitom s ve\u013ekos\u0165ou oka 80. Je vyroben\u00fd z rafinovanej bavlny alebo drevnej buni\u010diny prostredn\u00edctvom s\u00e9rie \u00e9terifik\u00e1ci\u00ed.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Obr\u00e1zok pr\u00e1\u0161ku MikaZone HPMC<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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Vlastnosti HPMC<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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  1. \u00a0HPMC m\u00e1 tepeln\u00e9 gelov\u00e9 vlastnosti. Vytv\u00e1ra zrazeninu a g\u00e9luje v vodnom roztoku a po ochladen\u00ed sa op\u00e4\u0165 rozp\u00fa\u0161\u0165a, preto sa \u010dasto pou\u017e\u00edva ako zahus\u0165ovadlo v sadrovom tmelu.<\/li>
  2. \u00a0Jeho vodn\u00fd roztok neobsahuje iontov\u00fd n\u00e1boj, tak\u017ee sa prid\u00e1va do sadrov\u00e9ho tmelu bez chemickej reakcie, a tie\u017e p\u00f4sob\u00ed ako vodu via\u017euci \u010dinidlo, \u010do napom\u00e1ha reakcii zlo\u017eiek v sadrovom tmelu za lep\u0161\u00edch podmienok.<\/li><\/ol>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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    Pre\u010do je potrebn\u00e9 prid\u00e1va\u0165 HPMC do sadrov\u00e9ho tmelu<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    Pridanie HPMC umo\u017e\u0148uje tmelu zv\u00fd\u0161i\u0165 jeho pevnos\u0165, t.j. zv\u00fd\u0161i\u0165 koheziu. V\u010faka pru\u017enosti polym\u00e9ru je kapacita deform\u00e1cie ove\u013ea vy\u0161\u0161ia ako u pevnej \u0161trukt\u00fary tvorenej vodou tvrd\u00fdmi materi\u00e1lmi, napr\u00edklad, a to zlep\u0161uje schopnos\u0165 tmelu deform\u00e1cie, pri\u010dom sa podstatne zvy\u0161uje roztiahnutie odolnosti vo\u010di praskaniu.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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    Po\u010das stavebn\u00e9ho procesu m\u00e1 z\u00e1klad steny ur\u010dit\u00fa mieru absorpcie vody, najm\u00e4 v prostred\u00ed s vysokou teplotou a pri odparovan\u00ed z vonkaj\u0161ieho prostredia, tmel strat\u00ed vodu pr\u00edli\u0161 r\u00fdchlo, \u010do vedie k olupovaniu a in\u00fdm javom, a t\u00fdm aj k zn\u00ed\u017eeniu pevnosti tmelu. Preto pridanie HPMC vyrie\u0161i tento probl\u00e9m (dobr\u00e1 vodn\u00e1 retencia).<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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    Na druhej strane m\u00e1 HPMC vysok\u00fa viskozitu, \u010do zvy\u0161uje vztlakov\u00fa silu tmelu a zabra\u0148uje zmr\u0161\u0165ovaniu po\u010das stavebn\u00e9ho procesu, a u\u013eah\u010duje jeho \u0161krabanie.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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    Z\u00e1ver<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    HPMC v sadrovom tmelu<\/a> je predov\u0161etk\u00fdm pou\u017e\u00edvan\u00e9 ako zahus\u0165ovadlo, vodu via\u017euci prostriedok a mazadlo.<\/strong>
    Zahus\u0165ovadlo: HPMC zahus\u0165uje sadrov\u00fd tmel, zlep\u0161uje jeho suspend\u00e1ciu a odolnos\u0165 vo\u010di zmr\u0161\u0165ovaniu, a udr\u017eiava jednotnos\u0165 roztoku.
    Vodu via\u017euci prostriedok: HPMC udr\u017eiava sadrov\u00fd tmel vlhk\u00fd a umo\u017e\u0148uje reakciu pomocn\u00e9ho popola pod vodou.
    Mazadlo: HPMC udr\u017eiava sadrov\u00fd tmel hladk\u00fd a rovnomern\u00fd po\u010das stavebn\u00e9ho procesu.
    Ako vyrobi\u0165     HPMC<\/a><\/strong> lep\u0161ie na zlep\u0161enie stavebn\u00e9ho procesu sadrov\u00e9ho tmelu, m\u00f4\u017eete Kontakt<\/strong><\/span><\/a> Odborn\u00edci na produkty MikaZone, aby v\u00e1m pripravili vzorec na mieru.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"

    HPMC (Hydroxypropyl Methyl Cellulose) zohr\u00e1va d\u00f4le\u017eit\u00fa \u00falohu pri formul\u00e1cii sadrov\u00e9ho tmelu. Pom\u00e1ha vytvori\u0165 hladk\u00fd, pru\u017en\u00fd tmel, s ktor\u00fdm je \u013eahk\u00e9 pracova\u0165. V tomto \u010dl\u00e1nku sa dozviete, pre\u010do je potrebn\u00e9 prid\u00e1va\u0165 HPMC do v\u00e1\u0161ho tmelu. Mnoh\u00e9 z v\u00fdhod, ktor\u00e9 v\u00e1m tento pr\u00edsada poskytuje, n\u00e1jdete ni\u017e\u0161ie. \u010co [\u2026]<\/p>","protected":false},"author":1,"featured_media":2048,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[],"class_list":["post-2046","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"_links":{"self":[{"href":"https:\/\/hpmc.ae\/sk\/wp-json\/wp\/v2\/posts\/2046","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hpmc.ae\/sk\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hpmc.ae\/sk\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hpmc.ae\/sk\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/hpmc.ae\/sk\/wp-json\/wp\/v2\/comments?post=2046"}],"version-history":[{"count":8,"href":"https:\/\/hpmc.ae\/sk\/wp-json\/wp\/v2\/posts\/2046\/revisions"}],"predecessor-version":[{"id":2058,"href":"https:\/\/hpmc.ae\/sk\/wp-json\/wp\/v2\/posts\/2046\/revisions\/2058"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hpmc.ae\/sk\/wp-json\/wp\/v2\/media\/2048"}],"wp:attachment":[{"href":"https:\/\/hpmc.ae\/sk\/wp-json\/wp\/v2\/media?parent=2046"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hpmc.ae\/sk\/wp-json\/wp\/v2\/categories?post=2046"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hpmc.ae\/sk\/wp-json\/wp\/v2\/tags?post=2046"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}