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Showing 1 to 11 of 11 for “"wood adhesives"”.
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Organic Fillers in Phenol-Formaldehyde Wood Adhesives
Veneer-based structural wood composites are typically manufactured using phenol-formaldehyde resols (PF) that are formulated with wheat flour extender and organic filler. Considering that this technology is several decades old, it is surprising to learn that many aspects of the formulation have not …
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Carboxymethylcellulose Acetate Butyrate Water-Dispersions as Renewable Wood Adhesives
… of these polymers were studied as renewable wood adhesives. Neat polymer analyses revealed that the apart from MW, the CMCAB systems had different acid values, and that the high MW system was compromised with gel particle contaminants. Formulation of the polymer into water-dispersions was …
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Moisture-Cure Polyurethane Wood Adhesives: Wood/Adhesive Interactions and Weather Durability
… subjects of moisture-cure polyurethane (PUR) wood adhesives: wood/PUR interactions and structure-property behavior emphasizing on weather durability. For these purposes, one simplified model PUR (MPUR) and three more commercially significant PURs (CPURs) with different hard segment contents …
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Wood liquefaction in the presence of phenol with a weak acid catalyst and its potential for novolac type wood adhesives
Wood liquefaction was conducted using phenol as a reagent solvent with oxalic acid as a catalyst. A series of studies were done on liquefied wood, liquefied wood residues, novolac-type liquefied wood resins, and bio-composites fabricated from liquefied wood resin. The results of the liquefied wood …
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Structure-property relationships of lignin-based isocyanate and amine adhesives for wood
… (HMMM) to form polyurethane and polyether wood adhesives respectively. Adhesive performance in shear block tests indicated: (a) that the combination of lignin and PHDI reduced the adhesive strength shown by neat PMDI. The HMMM failed to produce an acceptable wood adhesive in the absence of …
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Evaluation of the Ability of Adhesives to Substitute Nails in Wooden Block Pallets
… that is used to connect the components of wooden pallets together are helically or annularly threaded pallet nails. Pallet nails create a strong durable connection and increase manufacturing efficiency for a low cost. However, nails can also cause iron staining, wood splitting, and when …
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An Improved Method for the Fracture Cleavage Testing of Adhesively-Bonded Wood
… fracture testing procedure for adhesively-bonded wood, and demonstrates the sensitivity of this approach. The two significant improvements were: 1) the use of the flat double cantilever beam (DCB) geometry, which has been uncommon for wood and 2) the application of an established and powerful data …
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Novel Liquid extraction method for detecting Native-wood Formaldehyde
… formaldehyde emissions from nonstructural wood based composites. Two main sources of formaldehyde emission in non-structural wood based composites are adhesive and wood. Adhesives are quite well known and great efforts have been conducted to decrease their formaldehyde content; however …
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THE NATURE OF BOND FORMATION AND FAILURE IN WOOD-ADHESIVE SYSTEMS
… or the interphase between polycondensate wood adhesives (urea-formaldehyde (UF), melamine formaldehyde (MF), and phenol-resorcinol-formaldehyde (PRF)) and wood (spruce and scots pine) in an attempt to identify bonding and failure characteristics and forces. A number of techniques were …
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Mode-I Fracture in Bonded Wood: Studies of Adhesive Thermal Stability, and of the Effects of Wood Surface Deactivation
… the use of mode-I fracture testing to evaluate wood adhesion. In the first study, mode-I fracture testing was used to compare the thermal stability of polyurethane (PUR) and resorcinol-formaldehyde (RF) wood adhesives. Bonded specimens for both adhesives were subjected to prolonged thermal …
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Understanding the Role of N-Methylolacrylamide (Nma) Distribution in Poly(Vinyl Acetate) Latex Adhesives
… units in crosslinking poly(vinyl acetate) (PVAc) adhesives. In this case, distribution refers to the three potential locations of polymerized NMA units in a latex: the water-phase, the surface of polymer particles, and the core of the polymer particles. The objective is to identify the …