Because of the fiber differences, coir and jute are very different when it comes to carpet and the best use of each fiber. Coir is a very strong, stiff, and durable fiber, making it good for high traffic areas.
In addition, stiff coir fibers are used to make doormats because the strong fibers make it easy to get dirt and mud off shoes. However, these same properties that make coir strong and durable, make it a less practical option for areas where people will be barefoot or looking for a place to sit. Jute, in contrast, is a softer fiber and feels great on bare feet or skin, making it a better option for family living spaces.
Unfortunately, that softer feel makes for a less durable rug and is not a good option in high traffic areas. While both fiber choices offer many benefits, your choice will depend on what you are looking for in a carpet and where you plan to put the carpet. Explore all your options in natural flooring, including coir and jute. You must be logged in to post a comment. This site uses Akismet to reduce spam.
Learn how your comment data is processed. The advantages of natural fibres over traditional reinforcing fibres such as glass and carbon fibres are their low cost, low density, high toughness, acceptable specific strength, enhanced energy recovery, recyclability and biodegradability. Biocomposites derived from natural fibres and traditional synthetic thermoplastics or thermosets are mot sufficiently environmentally benign because the matrix resins are non-biodegradable. However these Biocomposites may maintain the balance between economic and environmental issues for a variety of industrial applications like automobile, construction, consumer products and others.
To improve the performance and durability of timber structures, fibre-reinforced polymer FRP composites are increasingly being used as reinforcements for wood [7]. Nowadays coir-ply boards with oriented jute as face veneer and coir plus waste rubber wood inside are widely used.
Phenol formaldehyde is used as matrix material. These natural materials have all the properties required for a general purpose board and can be used in place of wood or MDF boards for partitioning, false ceiling, surface paneling, roofing, furniture, cupboards, wardrobes etc [17]. Today engineers must design closer to material limits in order to meet cost and weight requirements. However, determining the point and mode of failure requires an accurate characterization of mechanical properties.
Unfortunately, while this type of data is readily available for most isotropic materials, it is only now being gathered for anisotropic composite materials [14]. In the recent years, computer simulation is emerging as an attractive approach to predict load distribution and failure of composite materials.
Finite element commercial software packages have been introduced by which the design can be optimized to reduce material costs and production time. Natural hard fibres such as coir and jute impregnated with phenolic resins were used for manufacturing these boards. A very thin layer of jute fibres impregnated with phenolic resin was overlayed as face veneer for improved aesthetics and to give a wood like smoother finish. The basic process involved in making coir ply comprises forming non-woven mats of the coir fibre with the fibres standing end-on to provide stiffness , spraying the mats with phenol formaldehyde resin, hot-pressing the sheets in a multi-daylight hydraulic press with a heating system and later trimming to required sizes.
The density of the ply can be changed with the pressure used. Depending on densities, the coir composite can be used like particle board, ply board, medium density fibre board or hard board [17]. The machine was set to kg range.
The valve was closed. Zero adjustment was made on the dial. The dimensions of the cross section of the specimens were measured. The distance between the centre and supports was measured. The specimen was placed symmetrically on the supports.
The load was applied slowly and continuously until the failure of specimen took place. The maximum load and the maximum deflection at failure were noted down. The developed models were deformed by applying load and the tensile stress and deflection were analysed.
The Finite Element Method is a series of numerical techniques used in solving Boundary value problems, Initial value problems and Eigen value problems. The basic process on finite elements is to divide the domain into pieces or elements, appropriates the equations governing the problem for each element as a function of selected values and solve for such values. Once this has been done, the element equations are referred in order to obtain appropriate solution variables of the problem.
Solving a fracture mechanics problem involves performing a linear elastic or elastic-plastic static analysis and then using specialized post processing commands or macros to calculate desired fracture parameters. ANSYS allows us to model composite materials with specialized elements called layered elements.
Once if it would be built a model using these elements, it could be done any structural analysis including nonlinearities such as large deflection and stress stiffening. It is needed to take special care in defining the properties and orientations of the various layers since each layer may have different orthotropic material properties.
They were constructed with the following configuration, and they were arranged one by one. The other two models M2 and M4 were developed with the new layer configuration which was included with the thin Phenolic Jute layers. The following Table 2. These specifications would be used by the software package to calculate the mechanical behavior of the models while they were deformed by applied loads. The coir and Jute nonwovens which were impregnated with Phenolic resin were considered as isotropic materials.
Because of the different mechanical properties with the grain direction, wood is considered as orthotropic material. The load range was set in 0 — N. The boards were deformed and the tensile stress was calculated. The density and the void percentage of the boards were also calculated by using the formulae which are noted in section 2.
Among them, three models were developed with the configuration of the obtained boards and two models were developed with new layer combinations which were included with thin layers of Phenolic Jute. The obtained results were compared with real values.
The following Table 3. In the Table 3. But the tensile stress for the Board 3 is tremendously increasing. The deflection is lower than the other boards and the tensile stress in bending is directly related with the deflection. The Boards 1 and 2 are thin materials compared with the Board 3. They have one and two layers of wood. So the samples are flexible and free to bend. Hence the B3 is so stiff and will not bend easily. So it can withstand for heavy loads for small deflection. The values are shown in Table 3.
In the obtained Boards, the density is not uniform and there is very large difference with the theoretical values. This infers that the materials were not properly impregnated into the resin. The densities of all the materials used in the boards are above 1.
With this improved density the void percentage would be This void difference leads to the poor bondage with wood and the fibres which inturn affects the strength values [19]. If this fault will be eliminated the strength will be increased tremendously. From the above discussion, it is known that the composite boards are not properly reinforced by the fibres.
The layer configurations are discussed in section 2. The models were deformed by applied load. The tensile stress and deflection are shown in Table 3. The same trend is followed in the developed models also that is the tensile stress is gradually increasing with the increasing thickness.
But in the deflection values, the first thing is that the deflection is increasing with the thickness. Also the above values are retabulated into two different sets as shown in Table 3. Set 1 is tabulated as the models which are developed according with the obtained boards. They consist only with Phenolic Coir and the Wood.
They are M1, M3 and M5. The second set of two new models consist the Phenolic Jute with coir and wood. They are M2 and M4. It is shown that the deflection values of the first set are higher than the second set. Before coming to analyze the Table 3. It is produced from plants in the genus Corchorus, which was once classified with the family Tiliaceae, more recently with Malvaceae, and has now been reclassified as belonging to the family Sparrmanniaceae. Jute is one of the most affordable natural fibers and is second only to cotton in amount produced and variety of uses of vegetable fibers.
Jute fibers are composed primarily of the plant materials cellulose and lignin. Coir is a natural fibre extracted from the husk of coconut and used in products such as floor mats, doormats, brushes, mattresses, etc.
Coir is the fibrous material found between the hard, internal shell and the outer coat of a coconut. Other uses of brown coir made from ripe coconut are in upholstery padding, sacking and horticulture. Uses of jute are making twine, rope, and making matting. Jute is used chiefly to make cloth for wrapping bales of raw cotton, and to make sacks and coarse cloth.
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