{"id":14054,"date":"2026-02-12T03:21:39","date_gmt":"2026-02-12T03:21:39","guid":{"rendered":"https:\/\/tenessy.com\/?p=14054"},"modified":"2026-02-12T03:21:39","modified_gmt":"2026-02-12T03:21:39","slug":"the-impact-of-hpmc-dosage-on-the-bonding-strength-of-tile-adhesive-the-key-role-of-scientific-proportioning","status":"publish","type":"post","link":"https:\/\/tenessy.com\/cs\/vliv-davkovani-hpmc-na-pevnost-lepidla-na-dlazdice-klicova-role-vedeckeho-davkovani\/","title":{"rendered":"Vliv d\u00e1vkov\u00e1n\u00ed HPMC na pevnost lepidla na dla\u017edice: Kl\u00ed\u010dov\u00e1 role v\u011bdeck\u00e9ho d\u00e1vkov\u00e1n\u00ed"},"content":{"rendered":"
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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\"Lepidlo\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\u2160.\u00davod<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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V modern\u00edm architektonick\u00e9m dekorativn\u00edm in\u017een\u00fdrstv\u00ed, lepidlo na dla\u017edice<\/a>, jako\u017eto z\u00e1kladn\u00ed materi\u00e1l pro pokl\u00e1dku obklad\u016f, p\u0159\u00edmo ur\u010duje bezpe\u010dnost a trvanlivost obkladov\u00e9ho syst\u00e9mu. S rozvojem v\u011bdy o stavebn\u00edch materi\u00e1lech se pou\u017eit\u00ed p\u0159\u00edsad stalo z\u00e1sadn\u00edm prost\u0159edkem pro zlep\u0161en\u00ed vlastnost\u00ed lepidel na obklady. Hydroxypropylmethylcelul\u00f3za (HPMC), jako\u017eto multifunk\u010dn\u00ed polymern\u00ed p\u0159\u00edsada, hraje ve slo\u017een\u00ed lepidel na obklady nezastupitelnou roli. Tento \u010dl\u00e1nek se zab\u00fdv\u00e1 slo\u017eit\u00fdm mechanismem, kter\u00fdm d\u00e1vkov\u00e1n\u00ed HPMC ovliv\u0148uje pevnost lepidla na dla\u017edice, a poskytuje teoretick\u00fd z\u00e1klad a praktick\u00fd n\u00e1vod pro optimalizaci receptur lepidel na dla\u017edice prost\u0159ednictv\u00edm v\u011bdeck\u00fdch \u00fadaj\u016f a anal\u00fdzy praktick\u00fdch aplikac\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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\u2161.Mechanismus HPMC v lepidle na dla\u017edice<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\"hydroxypropylmethylcelul\u00f3za\"\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Hydroxypropylmethylcelul\u00f3za (HPMC)<\/a> je polosyntetick\u00fd neiontov\u00fd celul\u00f3zov\u00fd \u00e9ter z\u00edskan\u00fd chemickou modifikac\u00ed p\u0159\u00edrodn\u00ed celul\u00f3zy. V syst\u00e9mu lepidel na dla\u017edice HPMC funguje p\u0159edev\u0161\u00edm n\u00e1sleduj\u00edc\u00edmi zp\u016fsoby:<\/p>

Zadr\u017eov\u00e1n\u00ed vody:<\/b><\/strong>\u00a0Molekuly HPMC obsahuj\u00ed \u010detn\u00e9 hydrofiln\u00ed skupiny, kter\u00e9 \u00fa\u010dinn\u011b adsorbuj\u00ed voln\u00e9 molekuly vody a zpomaluj\u00ed jej\u00ed migraci do por\u00e9zn\u00edch substr\u00e1t\u016f. T\u00edm je zaji\u0161t\u011bn dostate\u010dn\u00fd \u010das pro \u00faplnou hydrataci cementu, \u010d\u00edm\u017e se zvy\u0161uje hustota a pevnost cementov\u00e9 matrice.<\/p>

Zahu\u0161\u0165ovac\u00ed a protisp\u00e9kav\u00e9 vlastnosti:<\/b><\/strong>\u00a0HPMC m\u016f\u017ee ve vodn\u00fdch roztoc\u00edch vytv\u00e1\u0159et trojrozm\u011brnou s\u00ed\u0165ovou strukturu, co\u017e v\u00fdrazn\u011b zvy\u0161uje viskozitu pasty. To prop\u016fj\u010duje mokr\u00e9 malt\u011b vynikaj\u00edc\u00ed protiskluzov\u00e9 vlastnosti, kter\u00e9 zabra\u0148uj\u00ed prov\u011b\u0161ov\u00e1n\u00ed obklad\u016f a dla\u017eeb p\u0159i pokl\u00e1dce na svisl\u00fdch ploch\u00e1ch a zaji\u0161\u0165uj\u00ed p\u0159esnost stavby.<\/p>

Zlep\u0161en\u00e1 zpracovatelnost:<\/b><\/strong>\u00a0Vhodn\u00fd p\u0159\u00eddavek HPMC prodlu\u017euje otev\u0159enou dobu (dobu p\u0159izp\u016fsoben\u00ed) lepidla na dla\u017edice a zvy\u0161uje mazlavost a hladkost pasty, \u010d\u00edm\u017e je aplikace pohodln\u011bj\u0161\u00ed a \u00fa\u010dinn\u011bj\u0161\u00ed.<\/p>

Pos\u00edlen\u00e1 soudr\u017enost:<\/b><\/strong>\u00a0HPMC m\u00e1 sama o sob\u011b ur\u010ditou vazebnou schopnost, posiluje vazbu mezi vnit\u0159n\u00edmi \u010d\u00e1sticemi malty a omezuje vznik smr\u0161\u0165ovac\u00edch trhlin.<\/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\t\t<\/div>\n\t\t

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\u2162. Vliv d\u00e1vkov\u00e1n\u00ed HPMC na pevnost vazby<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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1. N\u00edzk\u00fd rozsah d\u00e1vkov\u00e1n\u00ed (0,1% - 0,3%)<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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V tomto rozmez\u00ed HPMC zaji\u0161\u0165uje p\u0159edev\u0161\u00edm z\u00e1kladn\u00ed retenci vody, ale jeho \u00fa\u010dinek je omezen\u00fd:<\/p>

Pevnostn\u00ed vlastnosti spoje:<\/b><\/strong>\u00a028denn\u00ed pevnost v tahu je obvykle 0,8 - 1,0 MPa.<\/p>

Anal\u00fdza mechanismu:<\/b><\/strong>\u00a0Nedostate\u010dn\u00e1 retence vody vede k ne\u00fapln\u00e9 hydrataci cementu, zejm\u00e9na na por\u00e9zn\u00edch podkladech, kde rychl\u00e1 ztr\u00e1ta vody v\u00e1\u017en\u011b ovliv\u0148uje v\u00fdvoj pevnosti.<\/p>

Zpracovatelnost:<\/b><\/strong>\u00a0Kr\u00e1tk\u00e1 doba otev\u0159en\u00ed (obvykle 15-20 minut), pr\u016fm\u011brn\u00e1 protiskluzovost.<\/p>

Pou\u017eiteln\u00e9 sc\u00e9n\u00e1\u0159e:<\/b><\/strong>\u00a0Vhodn\u00e9 pouze pro do\u010dasn\u00e9 projekty s n\u00edzk\u00fdmi po\u017eadavky nebo na extr\u00e9mn\u011b hust\u00e9 podklady.<\/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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2. Rozsah optim\u00e1ln\u00edho v\u00fdkonu (0,3% - 0,5%)<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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To je preferovan\u00fd \"zlat\u00fd interval\" pro v\u011bt\u0161inu receptur lepidel na dla\u017edice:<\/p>

\u0160pi\u010dkov\u00e1 pevnost spoje:<\/b><\/strong>\u00a028denn\u00ed pevnost v tahu m\u016f\u017ee dos\u00e1hnout 1,2-1,5 MPa, co\u017e p\u0159edstavuje zv\u00fd\u0161en\u00ed 30%-50% ve srovn\u00e1n\u00ed s kontroln\u00ed skupinou bez HPMC.<\/p>

Mechanismus \u00fa\u010dinku:<\/b><\/strong><\/p>

M\u00edra zadr\u017eov\u00e1n\u00ed vody m\u016f\u017ee p\u0159es\u00e1hnout 95%, co\u017e zaji\u0161\u0165uje d\u016fkladnou hydrataci cementu.<\/p>

Vytv\u00e1\u0159\u00ed vhodnou trojrozm\u011brnou s\u00ed\u0165ovou strukturu, kter\u00e1 zvy\u0161uje soudr\u017enost pasty.<\/p>

Optimalizuje strukturu p\u00f3r\u016f cementov\u00e9 matrice a sni\u017euje pod\u00edl \u0161kodliv\u00fdch p\u00f3r\u016f.<\/p>

Experiment\u00e1ln\u00ed \u00fadaje:<\/b><\/strong>\u00a0Z v\u00fdzkumu vypl\u00fdv\u00e1, \u017ee p\u0159i d\u00e1vkov\u00e1n\u00ed HPMC 0,4% dosahuje pevnost lepidla na dla\u017edice maxim\u00e1ln\u00ed hodnoty na r\u016fzn\u00fdch podkladech, p\u0159i\u010dem\u017e m\u00edra zachov\u00e1n\u00ed pevnosti po pono\u0159en\u00ed p\u0159esahuje 75%.<\/p>

Zpracovatelnost:<\/b><\/strong>\u00a0Doba otev\u0159en\u00ed se prodlu\u017euje na 25-35 minut, vynikaj\u00edc\u00ed protiskluzov\u00e9 vlastnosti a dobr\u00e1 hladkost aplikace.<\/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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3. Vysok\u00fd rozsah d\u00e1vkov\u00e1n\u00ed (0,5% - 0,8%)<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Za optim\u00e1ln\u00edm rozsahem doch\u00e1z\u00ed ke zlomu v\u00fdkonu:<\/p>

Zm\u011bna pevnosti vazby:<\/b><\/strong>\u00a0Pevnost za\u010d\u00edn\u00e1 klesat, kdy\u017e d\u00e1vkov\u00e1n\u00ed p\u0159ekro\u010d\u00ed 0,5%; p\u0159i 0,8% m\u016f\u017ee pevnost klesnout pod 1,0 MPa.<\/p>

Mechanismus negativn\u00edho dopadu:<\/b><\/strong><\/p>

Nadm\u011brn\u00e9 zahu\u0161\u0165ov\u00e1n\u00ed zt\u011b\u017euje m\u00edch\u00e1n\u00ed a vytv\u00e1\u0159\u00ed nadm\u011brn\u00e9 mno\u017estv\u00ed vzduchov\u00fdch bublin, kter\u00e9 zp\u016fsobuj\u00ed koncentraci nap\u011bt\u00ed.<\/p>

P\u0159\u00edli\u0161 dlouh\u00e1 doba zadr\u017eov\u00e1n\u00ed vody zpo\u017e\u010fuje v\u00fdvoj s\u00edly, zejm\u00e9na v ran\u00e9m obdob\u00ed.<\/p>

Vysok\u00e1 viskozita br\u00e1n\u00ed t\u011bsn\u00e9mu ulo\u017een\u00ed \u010d\u00e1stic cementu, co\u017e ovliv\u0148uje hustotu vytvrzen\u00e9 matrice.<\/p>

Dal\u0161\u00ed probl\u00e9my:<\/b><\/strong>\u00a0V\u00fdrazn\u00e9 zv\u00fd\u0161en\u00ed n\u00e1klad\u016f, potenci\u00e1ln\u00ed zv\u00fd\u0161en\u00ed smr\u0161t\u011bn\u00ed p\u0159i su\u0161en\u00ed a mo\u017en\u00e1 sn\u00ed\u017een\u00e1 sm\u00e1\u010divost u n\u011bkter\u00fdch substr\u00e1t\u016f.<\/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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\u2163. Komplexn\u00ed zohledn\u011bn\u00ed ovliv\u0148uj\u00edc\u00edch faktor\u016f<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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1. Vlastnosti substr\u00e1tu<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Substr\u00e1ty s vysokou absorpc\u00ed<\/b><\/strong>\u00a0(nap\u0159. p\u00f3robeton, keramzitov\u00e9 desky): Doporu\u010duje se relativn\u011b vy\u0161\u0161\u00ed d\u00e1vka 0,4% - 0,5%, aby se zabr\u00e1nilo rychl\u00fdm ztr\u00e1t\u00e1m vody.<\/p>

Substr\u00e1ty s n\u00edzkou absorpc\u00ed<\/b><\/strong>\u00a0(nap\u0159. st\u00e1vaj\u00edc\u00ed dla\u017edice, hutn\u00fd beton): 0,3% - 0,4% je dosta\u010duj\u00edc\u00ed; nadbytek m\u016f\u017ee nep\u0159\u00edzniv\u011b ovlivnit sm\u00e1\u010den\u00ed a lepen\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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2. Podm\u00ednky prost\u0159ed\u00ed<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Prost\u0159ed\u00ed s vysokou teplotou a n\u00edzkou vlhkost\u00ed:<\/b><\/strong>\u00a0D\u00e1vkov\u00e1n\u00ed p\u0159im\u011b\u0159en\u011b zvy\u0161te o 0,1% - 0,2%, abyste zabr\u00e1nili odpa\u0159ov\u00e1n\u00ed vody.<\/p>

Prost\u0159ed\u00ed s n\u00edzkou teplotou a vysokou vlhkost\u00ed:<\/b><\/strong>\u00a0M\u00edrn\u011b sni\u017ete d\u00e1vkov\u00e1n\u00ed, aby nedoch\u00e1zelo k nadm\u011brn\u00e9mu zpomalen\u00ed nastaven\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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3. Typ a t\u0159\u00edda cementu<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Miner\u00e1ln\u00ed slo\u017een\u00ed a jemnost r\u016fzn\u00fdch cement\u016f ovliv\u0148uj\u00ed pot\u0159ebu vody a rychlost hydratace. Vhodn\u00fd pom\u011br by m\u011bl b\u00fdt stanoven experiment\u00e1ln\u011b. Oby\u010dejn\u00fd portlandsk\u00fd cement obvykle vy\u017eaduje o n\u011bco vy\u0161\u0161\u00ed d\u00e1vku HPMC ve srovn\u00e1n\u00ed s cementem s ranou pevnost\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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4. Synergick\u00e9 \u00fa\u010dinky s jin\u00fdmi p\u0159\u00edsadami<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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V praktick\u00fdch formulac\u00edch se HPMC \u010dasto pou\u017e\u00edv\u00e1 v kombinaci s n\u00e1sleduj\u00edc\u00edmi p\u0159\u00edsadami:<\/p>

Redispergovateln\u00fd polymern\u00ed pr\u00e1\u0161ek (RDP)<\/a>:<\/b><\/strong>\u00a0Ob\u011b l\u00e1tky maj\u00ed synergick\u00fd posiluj\u00edc\u00ed \u00fa\u010dinek, ale pom\u011br d\u00e1vek mus\u00ed b\u00fdt vyv\u00e1\u017een\u00fd.<\/p>

\u00c9ter celul\u00f3zy<\/a> :<\/b><\/strong>\u00a0HPMC r\u016fzn\u00fdch viskozitn\u00edch t\u0159\u00edd m\u00e1 r\u016fznou citlivost na d\u00e1vkov\u00e1n\u00ed.<\/p>

Redukce vody<\/a>:<\/b><\/strong>\u00a0M\u016f\u017ee zm\u011bnit pot\u0159ebu vody v syst\u00e9mu a ovlivnit v\u00fdkon HPMC.<\/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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\u2164.Pr\u016fmyslov\u00e9 normy a regula\u010dn\u00ed po\u017eadavky<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Podle \u010d\u00ednsk\u00e9 pr\u016fmyslov\u00e9 normy pro stavebn\u00ed materi\u00e1ly JC\/T 547-2017 \"Lepidla na keramick\u00e9 dla\u017edice\":<\/p>

Lepidlo na dla\u017edice t\u0159\u00eddy C1:<\/b><\/strong>\u00a0Pevnost v tahu minim\u00e1ln\u011b 0,5 MPa.<\/p>

Lepidlo na dla\u017edice t\u0159\u00eddy C2:<\/b><\/strong>\u00a0Pevnost v tahu minim\u00e1ln\u011b 1,0 MPa.<\/p>

Dal\u0161\u00ed po\u017eadavky (nap\u0159. po pono\u0159en\u00ed do vody, tepeln\u00e9 st\u00e1rnut\u00ed) kladou vy\u0161\u0161\u00ed n\u00e1roky na retenci vody a stabilitu spoje.<\/p>

Racion\u00e1ln\u011b navr\u017een\u00e9 d\u00e1vkov\u00e1n\u00ed HPMC by m\u011blo zajistit, aby v\u00fdrobek nejen spl\u0148oval z\u00e1kladn\u00ed normy, ale tak\u00e9 si zachoval stabiln\u00ed \u00fa\u010dinnost v aktu\u00e1ln\u00edch slo\u017eit\u00fdch podm\u00ednk\u00e1ch.<\/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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\u2165. Z\u00e1v\u011br<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Vliv d\u00e1vkov\u00e1n\u00ed HPMC na pevnost lepen\u00ed lepidla na dla\u017edice vykazuje jasn\u00fd neline\u00e1rn\u00ed vztah \"nejprve se zvy\u0161uje, pak kles\u00e1\". Vhodn\u00fd p\u0159\u00eddavek (0,3% - 0,5%) m\u016f\u017ee v\u00fdrazn\u011b zlep\u0161it komplexn\u00ed vlastnosti lepidla na dla\u017edice, zat\u00edmco odchylka od optim\u00e1ln\u00edho rozmez\u00ed m\u016f\u017ee v\u00e9st ke zhor\u0161en\u00ed vlastnost\u00ed nebo k n\u00e1kladov\u00e9 neefektivit\u011b. P\u0159i praktick\u00e9m pou\u017eit\u00ed by optim\u00e1ln\u00ed d\u00e1vkov\u00e1n\u00ed pro konkr\u00e9tn\u00ed recepturu m\u011blo b\u00fdt stanoveno systematick\u00fdm experimentov\u00e1n\u00edm, komplexn\u011b zohled\u0148uj\u00edc\u00edm rovnov\u00e1hu mezi vlastnostmi podkladu, podm\u00ednkami prost\u0159ed\u00ed, kontrolou n\u00e1klad\u016f a po\u017eadavky na v\u00fdkon.<\/p>

S rozvojem v\u011bdy o stavebn\u00edch materi\u00e1lech a rostouc\u00edmi po\u017eadavky na stavebnictv\u00ed se hlub\u0161\u00ed pochopen\u00ed a p\u0159esn\u00e9 pou\u017eit\u00ed mechanismu HPMC stane kl\u00ed\u010dov\u00fdm technick\u00fdm aspektem p\u0159i zvy\u0161ov\u00e1n\u00ed kvality lepidla na obklady a zaji\u0161\u0165ov\u00e1n\u00ed dlouhodob\u00e9 bezpe\u010dnosti a spolehlivosti projekt\u016f architektonick\u00e9 v\u00fdzdoby. Doporu\u010duje se, aby v\u00fdrobci zavedli v\u011bdeck\u00e9 syst\u00e9my v\u00fdvoje receptur a stavebn\u00ed strany d\u016fsledn\u011b dodr\u017eovaly n\u00e1vody k pou\u017eit\u00ed v\u00fdrobk\u016f a spole\u010dn\u011b podporovaly technologick\u00fd pokrok a zvy\u0161ov\u00e1n\u00ed kvality v oboru.<\/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\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"

V modern\u00edm architektonick\u00e9m dekora\u010dn\u00edm in\u017een\u00fdrstv\u00ed lepidlo na obklady a dla\u017eby jako z\u00e1kladn\u00ed materi\u00e1l pro pokl\u00e1dku obklad\u016f a dla\u017eeb p\u0159\u00edmo ur\u010duje bezpe\u010dnost a trvanlivost obkladov\u00e9ho syst\u00e9mu. S rozvojem v\u011bdy o stavebn\u00edch materi\u00e1lech se pou\u017eit\u00ed p\u0159\u00edsad stalo kl\u00ed\u010dov\u00fdm prost\u0159edkem ke zlep\u0161en\u00ed vlastnost\u00ed lepidel na obklady. <\/p>","protected":false},"author":1,"featured_media":11145,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[35],"tags":[],"class_list":["post-14054","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-industry-news"],"yoast_head":"\nThe Impact of HPMC Dosage on the Bonding Strength of Tile Adhesive: The Key Role of Scientific Proportioning - HPMC|HEMC|HEC|RDP Manufacturer-TENESSY<\/title>\n<meta name=\"description\" content=\"Hydroxypropyl Methylcellulose (HPMC), as a multifunctional polymer additive, plays an irreplaceable role in tile adhesive formulations.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/tenessy.com\/cs\/vliv-davkovani-hpmc-na-pevnost-lepidla-na-dlazdice-klicova-role-vedeckeho-davkovani\/\" \/>\n<meta property=\"og:locale\" content=\"cs_CZ\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"The Impact of HPMC Dosage on the Bonding Strength of Tile Adhesive: The Key Role of Scientific Proportioning - 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