Milicia excelsa (Welw.) C. C. Berg sawdust as glue-extender in urea formaldehyde-adhesive in enhancing Ceiba pentandra (L.) Gaertn. veneer joint bonding strength

2017 ◽  
Vol 14 (1) ◽  
pp. 60-69
Author(s):  
C. Antwi-Boasiako ◽  
S. Abam
Keyword(s):  
Bonding Strength ◽  
Urea Formaldehyde ◽  
Ceiba Pentandra ◽  
Milicia Excelsa ◽  
Joint Bonding

scholarly journals The Impact of Nanoparticles and Moisture Content on Bonding Strength of Urea Formaldehyde Resin Adhesive

2018 ◽  
Vol 69 (3) ◽  
pp. 247-252
Author(s):  
Timuçin Bardak ◽  
Eser Sozen ◽  
Kadir Kayahan ◽  
Selahattin Bardak
Keyword(s):  
Moisture Content ◽  
Bonding Strength ◽  
Urea Formaldehyde ◽  
Urea Formaldehyde Resin ◽  
Formaldehyde Resin ◽  
Resin Adhesive ◽  
The Impact

The Structure and Curing Acceleration of PMUF Resins with Sodium Carbonate

2011 ◽  
Vol 181-182 ◽  
pp. 287-292 ◽  
Author(s):  
Zhen Zhong Gao ◽  
Feng Liao
Keyword(s):  
Sodium Carbonate ◽  
13C Nmr ◽  
Bonding Strength ◽  
Water Resistance ◽  
Urea Formaldehyde ◽  
High Water ◽  
Curing Time ◽  
Hot Press ◽  
Resin Adhesive ◽  
Press Time

The phenol-melamine-urea-formaldehyde (PMUF) cocondensed resin adhesive was prepared by using phenol, urea, melamine and formaldehyde as reactants. It was characterized by 13C NMR and the results indicated that the PMUF could reduce the content of free formaldehyde, and it could make wood-based panel with high water resistance and weatherability. Sodium carbonate (Na2CO3) was able to shorten the curing time by 40% when applied to the plywood process. The addition of Na2CO3 as the curing accelerator of a PMUF had little influence on the bonding strength of waterproof layer and could shorten the hot-press time.

scholarly journals Mechanical Properties of Particleboard using Acacia Mangium Wood Particles Binded With Seaweed-Based Adhesives

2021 ◽  
Vol 2129 (1) ◽  
pp. 012001
Author(s):  
K C Liew ◽  
A R Samin
Keyword(s):  
Mechanical Properties ◽  
Bonding Strength ◽  
Urea Formaldehyde ◽  
Brown Seaweed ◽  
Acacia Mangium ◽  
Modulus Of Rupture ◽  
Bending Test ◽  
Internal Bonding ◽  
Wood Particles ◽  
Internal Bonding Strength

Abstract The purpose of this study was to evaluate the mechanical properties of particleboards made from Acacia mangium wood particles binded with three different types of seaweed-based adhesive. Red seaweed (RS), brown seaweed (BS) and green seaweed (GS) were used as the seaweed-based adhesives., while particleboard using urea formaldehyde (UF) adhesive was produced as control. Adhesives and wood particles were mixed and then undergone mat-forming, pre-pressing, hot-pressing and conditioning process. The test pieces for bending test (Modulus of Elasticity, MOE; Modulus of Rupture, MOR), and internal bonding strength (IB) were cut into size according to JIS A 5908: 2003. From mechanical properties results attained, for internal bonding strength test, all boards using RS, BS and GS adhesives were found to be significantly different at p≤0.05. Apart from that, RS adhesive showed highest MOE and MOR at 529.4259 N/mm2 and 1.7900 N/mm2, respectively. As a conclusion, the mechanical properties of particleboard using RS, BS, and GS adhesives showed RS stands out as the better adhesive among them which have significant effects on its strength.

scholarly journals PEMANFAATAN BUNGKIL BIJI KARET SEBAGAI EKSTENDER PEREKAT PADA KAYU LAPIS PULAI (Alstonia angustiloba Miq.)

2017 ◽  
Vol 4 (1) ◽  
pp. 85
Author(s):  
M. I. Iskandar ◽  
Achmad Supriadi
Keyword(s):  
Bonding Strength ◽  
Starch Content ◽  
Urea Formaldehyde ◽  
National Standard ◽  
Seed Meal ◽  
Average Moisture Content ◽  
Adhesive Material ◽  
Rubber Seed ◽  
Intended Use

Bungkil Use as Seed Rubber Extender Gluten in Plywood Pulai (Alstonia angustiloba miq.)        Indonesia has the largest area of rubber trees in the world, in 2012 reached 3.5 million ha. As a producer of latex, rubber plant also produces lumber and rubber seeds. Rubber seeds have a starch content of 15.9%, so have the opportunity to be made extenders as mixing the adhesive material. This study aimed to determine the utilization of rubber seed meal as an extender adhesives Urea Formaldehyde (UF) on plywood pulai. Extender material made with varying levels of 10%, 20% and 30% respectively of the weight of the liquid adhesive. Variations intended use extenders levels in order to know the quality of plywood produced from a wide variety of levels of these extenders. The results showed that the average moisture content of plywood island 7.97%, density of 0.485 g / cm3, and the bonding strength of 11.36 kg / cm2. The water content and the bonding strength of plywood pulai ware designed to meet the Indonesian National Standard. Statistically analysis levels extenders very significant effect on the bonding strength of plywood pulai. The higher levels of extenders, bonding strength of plywood pulai tends to decrease. Plywood pulai that has the best bonding strength value was the use of extender content of 10%.Keywords: extenders, adhesives, rubber seed meal, plywood, quality pulaiABSTRAK         Indonesia memiliki areal tanaman karet terluas di dunia, pada tahun 2012 mencapai 3,5 juta ha. Sebagai penghasil getah, tanaman karet juga menghasilkan kayu dan biji karet. Biji karet memiliki kandungan pati 15,9 %, sehingga berpeluang untuk dibuat ekstender sebagai bahan pencampur perekat. Penelitian ini bertujuan untuk mengetahui pemanfaatan bungkil biji karet sebagai ekstender perekat Urea Formaldehida (UF) pada kayu lapis pulai. Bahan ekstender dibuat dengan kadar bervariasi yaitu 10 %, 20 % dan 30 % masing-masing dari bobot perekat cair. Variasi penggunaan kadar ekstender bertujuan agar dapat diketahui mutu kayu lapis yang dihasilkan dari berbagai variasi kadar ekstender tersebut. Hasil penelitian menunjukkan bahwa rata-rata kadar air kayu lapis pulai 7,97 %, kerapatan 0,485 gr/cm3, dan keteguhan rekat 11,36 kg/cm2. Kadar air dan keteguhan rekat kayu lapis pulai yang dibuat memenuhi Standar Nasional Indonesia. Secara statistik kadar ekstender berpengaruh sangat nyata terhadap keteguhan rekat kayu lapis pulai. Makin tinggi kadar ekstender, keteguhan rekat kayu lapis pulai cenderung berkurang. Kayu lapis pulai yang memiliki nilai keteguhan rekat terbaik adalah yang menggunakan ekstender kadar 10 %.Kata kunci : Ekstender, perekat, bungkil biji karet, kayu lapis, kualitas pulai

Effect of Jatropha Seed Oil Meal and Rubber Seed Oil Meal as Melamine Urea Formaldehyde Adhesive Extender on the Bonding Strength of Plywood

2012 ◽  
Vol 12 (11) ◽  
pp. 1148-1153 ◽  
Author(s):  
Huei Ruey Ong ◽  
D.M. Reddy Prasad . ◽  
Maksudur R. Khan . ◽  
D. Subba Rao . ◽  
Nitthiyah Jeyaratnam . ◽  
...  
Keyword(s):  
Bonding Strength ◽  
Seed Oil ◽  
Urea Formaldehyde ◽  
Rubber Seed Oil ◽  
Rubber Seed ◽  
Jatropha Seed

Determination of regression relationships of plywood gluing duration on its bonding strength, using resins with different formaldehyde content

10.12737/8454 ◽  
2015 ◽  
Vol 4 (4) ◽  
pp. 115-122
Author(s):  
Котенева ◽  
Anastasiya Koteneva ◽  
Пономаренко ◽  
Larisa Ponomarenko ◽  
Кантиева ◽  
...  
Keyword(s):  
Bond Strength ◽  
Bonding Strength ◽  
Urea Formaldehyde ◽  
Regression Equations ◽  
Formaldehyde Content ◽  
Anal Ysis ◽  
Low Toxic

The task of the experiment was to clarify the standard modes of bonding plywood using in their produc-tion low toxic urea-formaldehyde resins, and obtain the required bond strength, as well as statistical anal-ysis of the results of research in order to obtain regression equations. The results showed that the bonding strength of plywood on low toxic resins is lower than on resins with high formaldehyde content. To en-sure the preservation of strength is possible only due to increased consumption of adhesive and duration of bonding.

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