Refine your search
Collections
Co-Authors
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z All
Khali, D. P.
- Amelioration of Phenol Formaldehyde Adhesive With Silicic Acid for Application in Plywood
Abstract Views :179 |
PDF Views:0
Authors
Affiliations
1 Forest Products Division, Forest Research Institute Dehradun, IN
1 Forest Products Division, Forest Research Institute Dehradun, IN
Source
Indian Forester, Vol 141, No 4 (2015), Pagination: 397-402Abstract
Phenol formaldehyde adhesive is used in laminated as well as composite panels due to its good adhesion, high polymeric strength and excellent stability. The purpose of present study was to prepare plywood of good shear strength using silicic acid (2,3 and 4%) in phenol formaldehyde adhesive. The effect of silicic acid on plywood was evaluated by testing glue shear strength (GSS) of plywood in dry and wet conditions. The mycological test was also conducted in plywood to test its efficacy against white rot fungus (Trametes versicolor). Results revealed that shear strength of plywood was increased by adding silicic acid (2 and 3%) in adhesive, whereas by increasing the concentration of silicic acid (4%) the glue shear strength was reduced but still met the requirement of shear strength as per IS: 848. It was found that glue failure percentagewas also reduced after adding silicic acid in PF adhesive.Keywords
Glue Shear Strength, Phenol Formaldehyde Adhesive, Pressing Time, Silicic Acid, Trametes versicolor.- Effect of Needle Punch Technique on the Properties of MDF Board from Bamboo (Dendrocalamus strictus)
Abstract Views :179 |
PDF Views:0
Authors
Affiliations
1 Forest Research Institute, Dehradun (Uttarakhand), IN
2 Directorate of Education, ICFRE, Dehradun (Uttarakhand), IN
3 Indian Agriculture Research Institute, New Delhi, IN
1 Forest Research Institute, Dehradun (Uttarakhand), IN
2 Directorate of Education, ICFRE, Dehradun (Uttarakhand), IN
3 Indian Agriculture Research Institute, New Delhi, IN
Source
International Journal of Forestry and Crop Improvement, Vol 8, No 2 (2017), Pagination: 93-96Abstract
Bamboo is as a raw material found in whole over India. A number of production techniques can be used to improve the properties of MDF; particularly the tensile strength perpendicular to grain (internal bond). One of the new techniques is needle punch. Where-in the wooden frame with needles is used to punch the fibre mattress before making a board. Effect of needle punch technique on physical and mechanical properties of MDF board was evaluated. Boards were prepared from bamboo with 6%, 8% and 10% phenol formaldehyde resin using needle punch technique (two time punch) after the mat formation at three different pressure i.e., 14 kg/cm2, 17.5 kg/cm2 and 21 kg/cm2, respectively, for 15 minute hot pressing. The physical and mechanical properties of MDF board were evaluated as per IS specification 12406:2003. An increase trend in the internal bond strength of MDF board with the increase in needle punching during mat formation as well as resin content and pressure was observed. The results indicate that suitable MDF boards can be prepared using needle punch technique (two time punch) with 10% resin content at 21kg/cm2 specific pressure which meets most of the other physical and mechanical properties as per IS: 12406:2003. Some of the physical properties of board like water absorption and general swelling were higher than the Indian Standard requirements which can be controlled by suitable treatment.Keywords
MDF Board, Dendrocalamus strictus, Bamboo Fibre, Phenol Formaldehyde.References
- Abd.Latif, M., Tarmeze, W.A. W. and Fauzidah, A. (1990). Anatomical features and mechanical properties of three Malaysian bamboos. J. Tropical Forest Sci., 2 (3): 227-234.
- Anonymous (1981). Methods of test for wood particleboards and boards from other lignocellulosic materials, IS: 2380 (Part- I- 21), Bureau of Indian Standard, New Delhi.
- Anonymous (2003). Specification for medium density fibreboard for general purposes. IS: 12406, Bureau of Indian Standard, New Delhi.
- Chaowana, Pannipa (2013). Bamboo: An Alternative raw material for wood and wood-based composites. J. Materials Sci. Res., 2(2): 90-102.
- Jain, S., Kumar, R. and Jindal, U.C. (1993). Development and fracture mechanism of the bamboo/polyester resin composite. J. Mater. Sci. Lett., 12 (8) : 558-560.
- Lakkad, S.C. and Patel, J.M. (1981). Mechanical properties of bamboo, a natural composite. Fibre Board Sci. & Tech., 14 (3) : 319-322.
- Marinho, N.P., Nascimento, E.M., Nisgoski, Silvana and Valarelli, I. D. (2013). Some Physical and Mechanical Properties of Medium-Density Fiberboard Made from Giant Bamboo. Materials Res., 16(6): 1387-1392.
- Shupe, T.F., Piao, C. and Hse, C.Y. (2002) Value added Manufacturing Potential in Honduran /Alianza. USAID Project Pp21
- Winistorfer, P.M. and Young, T.M. (1996): Modeling and comparing vertical density profýles. Wood & Fiber Sci., 28 (1): 133-141.