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Oponentský posudek Doc. Ing. Ján Sedliačik, Ph.D.

Oponentský posudek Doc. Ing. Ján Sedliačik, Ph.D. Výhrada k příloze č. 5: Chlorid amónny je legislatívne zakázanou látkou na použitie ako tvrdivo do UF lepidiel, a v praxi sa z tohto dôvodu nepoužíva niekoľko rokov. Praha, 25. 4. 2012. Označení v potravinářství - E 510.

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Oponentský posudek Doc. Ing. Ján Sedliačik, Ph.D.

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  1. Oponentský posudek Doc. Ing. Ján Sedliačik, Ph.D. Výhrada k příloze č. 5: Chlorid amónny je legislatívne zakázanou látkou na použitie ako tvrdivo do UF lepidiel, a v praxi sa z tohto dôvodu nepoužíva niekoľko rokov. Praha, 25. 4. 2012

  2. Označení v potravinářství - E 510

  3. Charakteristika UF lepidla – další dílčí výstup Properties and composition of urea–formaldehyde adhesive resin used for manufacturing of plywood panels for interior uses a Percent based on solid content of UF resin The pressing conditions for the plywood panels bonded with urea–formaldehyde adhesive resin a 0.9-1.4 MPa for softwood plywood, 1.5 MPa for hardwood plywood b Basic curing time for urea-formaldehyde adhesive is 3 minutes and for the heating of 1 mm veneer thickness, it is 1 minute. The heating of aluminum base, which is inserted to the press with stacked set, adds 1 minute. c It depends on several variable parameters – e.g., nominal veneer thickness and number of layers. With the increasing thickness of veneers the adhesive spread also increases. It also affects the veneer quality and type of plywood.

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