Pizzi (1994) suggested that UF adhesive polymer is the result of condensation reaction of formaldehyde with urea.<\/span> Advantages of UF adhesives include water soluble, hard, non-flammable, good heat properties, colorless when hardened, and the price is cheap.<\/span> Hiziroglu (2007) suggested some of the characteristics of the adhesive Urea-Formaldehyde (CH4 N20CH20) x among others:<\/span> Vick (1999) suggested that there is a UF adhesive powder or liquid, white, colorless adhesive lines and more durable when combined with melamine.<\/span> This is the use of adhesive for plywood, furniture, fiber board and particle board.<\/span> Tsoumis (1991) suggested that UF is available daalam liquid or powder form.<\/span> This Resain 95-1 hardened at a temperature of 30 C. UF is not suitable for exterior.<\/span><\/p>\n However, its performance can be improved with the addition of Melamine Formaldehyde or Formaldehyde Resorcynol about 10-20%.<\/span> Results connection with UF colorless to light brown color.<\/span> The downside of UF, among others, are not waterproof and cause formaldehyde emissions that impact on health.<\/span> UF adhesives are included in the group of thermosetting adhesive.<\/span> In its use is often added hardener, filler, extender and water.<\/span><\/p>\n According to Rayner (1967) in Joyoadikusumo (1984) UF adhesives have excellent resistance to cold water, somewhat resistant to hot water, but not resistant to boiling.<\/span> After that, if made of plywood 3 layers, specifically for finir which will serve as the core whitewash both surfaces with glue \/ adhesive through the machine glue spreader, while finir-finir the other (F \/ B) attached to finir which has given the adhesive with the provisions direction the fibers are perpendicular to each other.<\/span><\/p>\n Furthermore finir-finir that have been glued together the (finir must be an odd number) are cold-pressed in a cold press for 5-15 minutes, the pressure of 10- 15 kg \/ cm2, and then followed by compression in the heat in a hot press to enter the finir-finir which has been glued in between the hot steel plates with a pressure of 10 kg \/ cm2, temperature of 100 to 170o (generally 110 to 120o C) for 1.5 minutes.<\/span> Plywood further cut edges corresponding to the final size of the saw cut double (double s), then smoothed (sanding) and checked the quality (grading plywood).<\/span> If still found damage (tear or hole) and enabling improved then the face of the plywood is then repaired again with caulked so that the quality plywoodnya increased.<\/span><\/p>\n How to sawmill<\/strong><\/span> How to perautan<\/strong><\/span> Pizzi (1994) suggested that UF adhesive polymer is the result of condensation reaction of formaldehyde with urea. Advantages of UF adhesives include water soluble, hard, non-flammable, good heat properties, colorless when hardened, and the price is cheap. Hiziroglu (2007) suggested some of the characteristics of the adhesive Urea-Formaldehyde (CH4 N20CH20) x among others: o Gravity: …<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1812],"tags":[855,864,861,860,857,862,858,856,863,859],"class_list":["post-659","post","type-post","status-publish","format-standard","hentry","category-english","tag-urea-formaldehyde","tag-urea-formaldehyde-chemistry","tag-urea-formaldehyde-concentrate","tag-urea-formaldehyde-concentrate-msds","tag-urea-formaldehyde-condensation","tag-urea-formaldehyde-foam-insulation-removal","tag-urea-formaldehyde-mechanism","tag-urea-formaldehyde-msds","tag-urea-formaldehyde-resin-price","tag-urea-formaldehyde-vs-formaldehyde"],"_links":{"self":[{"href":"https:\/\/www.tneutron.net\/seni\/wp-json\/wp\/v2\/posts\/659","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.tneutron.net\/seni\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.tneutron.net\/seni\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.tneutron.net\/seni\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.tneutron.net\/seni\/wp-json\/wp\/v2\/comments?post=659"}],"version-history":[{"count":1,"href":"https:\/\/www.tneutron.net\/seni\/wp-json\/wp\/v2\/posts\/659\/revisions"}],"predecessor-version":[{"id":3477,"href":"https:\/\/www.tneutron.net\/seni\/wp-json\/wp\/v2\/posts\/659\/revisions\/3477"}],"wp:attachment":[{"href":"https:\/\/www.tneutron.net\/seni\/wp-json\/wp\/v2\/media?parent=659"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.tneutron.net\/seni\/wp-json\/wp\/v2\/categories?post=659"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.tneutron.net\/seni\/wp-json\/wp\/v2\/tags?post=659"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\n o Gravity: 1:27<\/span>
\n o Solid content: 64.8%<\/span><\/p>\n
\n After that rekatan finir (candidate plywood) are removed from the hot press machine one by one in order to obtain plywood (plywood).<\/span><\/p>\n
\n Is the oldest way and they are very rarely used, because finirnya thick enough that at least 5 mm.<\/span> Wood is used in the form of a square timber and the yield is low.<\/span> Even if there can only be found in small industry.<\/span> Sawing process using circular sawing of veneer or horizontal gang of saw for veneer.<\/span><\/p>\n
\n<\/strong> Finir way of making this principle is like sharpening a pencil (a pencil is an analogy logs without bark).<\/span> This method is now abandoned and not developed.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"