White jute

After much debate, there seems to be agreement that white jute originated in the Indo-Burma region and tossa jute in Africa. China is also considered to be one of the places of jute origin. According to some academics, some provinces of the southern parts of China are the secondary centres of origin of tossa and white jute [19]. 

Figure 5.11 The product molded using colored NF-LFP (breaker case), (a) NF-LFP reinforced with the white jute fiber and (b) NF-LFP colored cream.

Tanaka, T., Eujiura, T., Fujii, T., Okubo, K., and Okuno, K. (2005) Development of Long-Eiber Reinforced TP Pellets Using White Jute Fiber. (NF-LFP). 

Distinction between Raw and Bleached Products.—In the raw state, many textile fibres, such as flax, hemp, jute, etc., exhibit a colour quite distinct from white and in these cases the distinction between raw and bleached products is simple and is made by the eye. Other fibres, however, such as those of cotton and wool, are often white in the unbleached state and in such cases the distinction between the raw and bleached products cannot be made by the eye but requires investigation. 

Scouring and bleaching of jute with sodium chlorite with an acceptable whiteness can be achieved, but the process is a time consuming two step process. Moreover, sodium chlorite is metal corrosive and health hazardous. 

Manzoor-i-Khuda et al. [17] have studied the variation in chemical constituents of jute fiber taken from different grades of both white and tossa and concluded that certain correlations exist between the analytical results and the commercial grade. Thus, it is claimed that the lignin content increases as the grades go from higher to lower, and that the ash content and copper number show similar negative correlations. 

The sunn plant produces 2-4% of dry fiber by weight. The sunn fiber is white to gray in color, has a shiny luster and fine texture. It has high tensile strength, but is coarser than jute and kenaf and not as pliable. Therefore, it is unsuitable for mixing with jute in making jute hessian. Its other uses include canvas, sailcloth, industrial ropes, nets, and twines. 

Isol. from the partial acid hydrolysates of white spruce (Picea glauca), western hemlock (Tsuga heterophylla), jute fibre, maritime pine (Pinus pinaster), aspen (Populus tremuloides) hemicelluloses. 

There are mainly two types of jute. They are capsularis (white) and olitorious (tossa), while the capsularis fibre is whitish in colour and olitorious... 

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