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Flax fibres

A microscopic preparation is made, as described later, of cotton or flax fibres obtained from white fabrics repeatedly washed. These fibres are treated for about 1-2 minutes with the iodine solution, which is then eliminated by careful and complete absorption with thin strips of filter-paper.1 One or two drops of the acid prepared as above are added, the cover-slip placed and the preparation observed under the microscope. If the concentration of the acid is correct, the flax and cotton fibres are coloured blue without being deformed. If, however, the coloration is feeble and tends to red, the acid is too dilute, while if the fibres swell, it is too concentrated. [Pg.442]

Hemp. This is obtained from the bast fibres of Cannabis sativa. Under the microscope these fibres, which are usually joined in bundles, have a bruised cylindrical appearance and a diameter greater than that of flax fibres (Fig. 74, Plate VII). They are irregular as regards thickness and there are many longitudinal striations, which are sometimes so marked as to render difficult the observation of the internal channel, the latter being about one-third as wide as the fibres. Transverse striae are also observed often these do not traverse the whole width of the fibre and they arc not so regular in appearance as with flax. At the ends the fibres are usually rounded and sometimes slit down for a short distance. [Pg.447]

Although the typical characters of the flax fibre differ appreciably from those of hemp, certain products of these two fibres are somewhat difficult to... [Pg.447]

Make day rods with embedded, parallelly aligned flax fibres and compare their breaking strengths with those of fibre-less clay rods. [Pg.337]

An educational experiment cement rods with flax fibres The purpose of this educational experiment, which was developed in the materials science laboratory of my school, is to instruct and illustrate. Preferably simply experiments should be done to support theoretical knowledge. [Pg.353]

As used today, the word linen is descriptive of a class of woven textiles used in homes. Linens were manufactured almost exclusively of fibres from the flax plant Linum usitatisimum. Today flax is a prestigious, expensive fibre and only produced in small quantities. Flax fibres can be identified by their typical nodes, which account for the flexibility and texture of the fabric. The cross-section of the fibre is made up of irregular polygonal shapes, which contribute to the coarse texture of the fabric. When adequately prepared, linen has the ability to absorb and lose water rapidly. It can gain up to 20% moisture without feeling damp. [Pg.114]

Fibre crops Flax fibre and tow Seed cotton... [Pg.119]

Girallt R, Rihouey BF, Jauneau A, Norvan C and Jarvis M (1997) Galactans and cellulose in flax fibres putative contrihutions to the tensile strength. International Journal of Biological Macromolecules, 21 179-88... [Pg.568]

Flax is considered to be the oldest fibre in the Western world and CIS (formerly USSR) grows most of the flax fibre. Linen has been gradually loosing its position as an apparel fabric since 1950s, but the emergence of linen as a component of blends has stimulated considerable interest. [Pg.17]

Flax fibres are multicellular, with each cell having tapering ends and a narrow lumen. The fibres show longitudinal striations and nodes (Fig. 1-13). The ultimate... [Pg.17]

Figure 1-13. Cross-section of flax fibre (E.I.DuPorii de Nemours Co.). Figure 1-13. Cross-section of flax fibre (E.I.DuPorii de Nemours Co.).
Cellulose is the main constituents of flax fibre (Fig. 1-14). The unretted flax contains about 16.7% hemicellulose, 1.8% pectins, 2% lignin and 1.5% fats and waxes. The polymer of flax consists with a degree of polymerisation of about 18000 cellobiose units. Flax is an assembly of ultimates cemented together within the fibres and an assembly of these fibres into bundles. These assemblies are prone... [Pg.17]

The best known and most abundantly used multicellular fibre is flax or linen. Fabrics made from flax fibres have been used since prehistoric times. The plant still grows naturally in swampy regions between the eastern shores of the Black Sea and the Caucasus. Its cultivation may have originated from this region, but the surmise is not supported by any conclusive evidence. Flax was used in Egypt in about 2500 B.c., and the failure of the flax crop is specifically mentioned as one of the plagues in the Book of Moses. The ships of the Phoenicians and Greeks were borne across the seas by sails made of linen. [Pg.66]

Flax fibres vary in length from 1 to 3 in. Each fibre is composed of a number of fibrils consisting of several cells joined together. These have an average length of about 1 in. and a diameter of from 1/1800 to 1/1000 in. The fibre has the appearance of a straight tube with thick walls and a narrow but distinct lumen, as shown in Figs. 4.2 and 4.3. The end of the... [Pg.68]

GJ Faughey and HSS Sharma. A Preliminary Evaluation of Near Infrared Spectroscopy for Assessing Physical and Chemical Characteristics of Flax Fibre. Near Infrared Spectrosc. 8 61-69, 2000. [Pg.136]

B.S. Kaith, and A.S. Singha, "Some studies towards grafting of methylacrylate onto Flax fibre using ceric ammonium nitrate as redox initiator" Proceedings of the 4th International Petroleum Conference and Exhibition, New Delhi, 2001. [Pg.54]

A.S. Singha, and B.S. Kaith, "Moisture absorbance studies on the graft co-polymers of Flax fibre with binary monomer mixtures at various humidities and temperatures" Proceedings of the 38th lUPAC Congress, Brisbane (Australia), 2001. [Pg.56]

Selection of the Fibre.—Cotton fibre, wood fibre, and flax fibre in the form of raw cotton, scoured cotton, paper, and rags are most generally used, and give the best results. As the fibres differ greatly in their stmcture,... [Pg.43]

Nitration of the Fibre.—Mixed cotton and flax fibre in the form of paper, from 2/1000 to 3/1000 inch thick, and cut into 1-inch squares, is nitrated by the Celluloid Manufacturing Company, and the same paper, left in long strips, 1 inch wide, is used for nitration by the Xylonite Manufacturing Company, of North Adams,... [Pg.44]

Flax, fibre from Linum usitatissimum (the source of linseed oil) and numerous other plants. [Pg.91]

Dissanayake, N.P.J., Summerscales, J., Grove, S.M., Singh, M.M., 2009h. Life cycle impact assessment of flax fibre for the reinforcement of composites. Journal of Biobased Materials and Bioenergy 3 (3), 245—248. [Pg.319]

Akin D.E. McAlister D.D. Ill Foulk J.A. Evans J.D., Cotton fibres Properties and interaction with flax fibres in blends.. International Cottontest Conference. Bremen 26, 189, 8p, Mar. 13-16, (2002). [Pg.515]


See other pages where Flax fibres is mentioned: [Pg.861]    [Pg.1179]    [Pg.447]    [Pg.448]    [Pg.353]    [Pg.76]    [Pg.114]    [Pg.17]    [Pg.21]    [Pg.290]    [Pg.290]    [Pg.291]    [Pg.68]    [Pg.68]    [Pg.71]    [Pg.200]    [Pg.60]    [Pg.56]    [Pg.44]    [Pg.44]    [Pg.44]    [Pg.11]    [Pg.213]    [Pg.304]    [Pg.316]    [Pg.895]   
See also in sourсe #XX -- [ Pg.17 , Pg.429 ]

See also in sourсe #XX -- [ Pg.17 , Pg.429 ]

See also in sourсe #XX -- [ Pg.429 , Pg.433 ]




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Bast Fibres (Flax, Hemp)

Bast fibres (flax, hemp, jute, ramie, kenaf, abaca)

Flax

Mercerization of remie and flax fibres

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