Classifications

• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01C—CHEMICAL OR BIOLOGICAL TREATMENT OF NATURAL FILAMENTARY OR FIBROUS MATERIAL TO OBTAIN FILAMENTS OR FIBRES FOR SPINNING; CARBONISING RAGS TO RECOVER ANIMAL FIBRES
  • D01C1/00—Treatment of vegetable material
  • D01C1/02—Treatment of vegetable material by chemical methods to obtain bast fibres
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S524/00—Synthetic resins or natural rubbers -- part of the class 520 series
  • Y10S524/925—Natural rubber compositions having nonreactive materials, i.e. NRM, other than: carbon, silicon dioxide, glass titanium dioxide, water, hydrocarbon or halohydrocarbon

Definitions

• the invention refers to a process for treating the fibers obtained from the husk of coconuts,
• the fibers treated with chemicals such as caustic soda in the manner as described in the said British patent have a brown colour. While such fibers when spun into yarn may be bleached, this treatment is very expensive. Moreoverin order to bring light colours upon the brown coloured yarn it was necessary to first bleach these yarns and then dye the same, so that these coco yarns were too expensive for many purposes.
• the object of the present invention is to remove in'a surprisingly simple manner all these disadvantages and to obtain still other advantages which could not be obtained with the known processes, wherein the coco fibers as obtained by beating or retting the husks of the coconuts, even without any cooking process or breaking up by means of alkali, may directly be formed mechanically into a sliver which is adapted to be spun.
• the process according to the invention principally consists therein, that the coconut fibers as they are, e. g., obtainable on the open market in the form of beaten fibers from husks of fully 40 ripened coconuts, either as retted spinning fibers or as brush fiber or the mattress-fiber obtained at the same time, or mixtures of those different kinds of coco fibers, are treated with a binding or adhesive fluid, e. g., a starch-water or diluted latex or the like adhesion-producing liquids, or the fibers are treated with dry ma terials which are adapted to enhance the natural adhesive qualities of the fibers themselves.
• a binding or adhesive fluid e. g., a starch-water or diluted latex or the like adhesion-producing liquids
• the fibers are treated with dry ma terials which are adapted to enhance the natural adhesive qualities of the fibers themselves.
• the fibers are dried until a predetermined percentage of moisture is obtained, so that the adhesive has still such an activity that the coconut fibers stick to each other during the formation of the sliver, in order that the sliver which is required for the mechanical spinning can be formed during the whole spinning process.
• s q l t It is also possible to cook, the coco fibers directly in starch-water or other adhesive'liquids and then centrifuge and dry the same as above described.
• this powder When treating the coco fibers, e. -g., with adhesive powder, this powder must also be so applied that the adhesive possesses equal activity when forming the sliver.
• coco fibers may be spun according to the method'as described in Dutch. Patent No.
• coco fibers are imported from oversea in hydraulically pressed bales. These bales are opened and the fibers passed into a centrifuge,
• starch-water is supplied containing about 25 grams of starch per 25 litre water.
• the centrifuged coco fibers are preferably led to a mechanically fed drying apparatus, as used in many textile and other works, and whereby the final degree of wetness is regulated as re- 40 1 'quired.
• coco fibers For economically spinning the coco fibers this is of great importance, because it has appeared that when the degree of wetness is too high the card sliver cannot keep together the fibers, even when the sliver is formed under very 45 ceeds so quickly, that the coco fibers can be formed upon the carding bench into a sliver about ten minutes after they have been loosened from the bales.
• the carding benches may be arranged directly behind the drying apparatus.
• the correct quantity of starch is more or less dependent on the coarseness or fineness of the fiber material. This is also the case with other binding or adhesive materials. It must always be so, that in case of normal conditioning of the fibers, the sliver can be formed upon the carding and the stretching benches.
• the process according to the invention enables the coco fibers first to be bleached, dyed or impregnated and then to be treated with adhesive fluids or liquids, whereby it is observed that by the treatment according to the invention there appears no difierence worth mentioning of colour between the unspun coloured fibers and thespun yarn, so that it is possible to import directly from the Dutch East Indies dyed or bleached fibers and spin the same here to coloured yarns.
• This process makes it possible to get an unlimited number of colour variations of the coco yarns by mixing dyed o-rbleached fibers or slivers upon the stretching benches,
• a further advantage of the invention consists therein that by the addition of the adhesive, specially in the liquid process, this liquid will be equally distributed over all the fibers, so that the adhesion between the fibers during the spinning process of the yarnsgrows and the tensile strength of the yarns is raised, which later infiuences the strength of the fabrics made of these yarns.
• the process according to the invention enables the poor coco tree farmer without expensive machine-plants to prepare his coco fibers, which may then be pressed into bales and sent to the works in order to be made spinnable by the new process for the mechanical spinning.
• a process for forming a sliver from coir fibers obtained from the husks of coconuts comprises the steps of applying an adhesive to the fibers, maintaining said adhesive in a tacky condition for a length of time sufficient to form a sliver, and forming the fibers into a silver while the adhesive is in said tacky condition.
• a process for forming a sliver from coir fibers obtained from the husks of coconuts comprises the steps of treating the fibers with a liquid adhesive, dryingthe fibers until the adhesive assumes a tacky condition, maintaining the adhesive in said tacky condition for a length of time sufficient to form a sliver, and forming the fibers into a sliver while the adhesive is in said tacky condition.
• the liquid adhesive consists of starch water containing about 25 grams of starch per liter of water.

Landscapes

• Engineering & Computer Science (AREA)
• General Chemical & Material Sciences (AREA)
• Chemical & Material Sciences (AREA)
• Molecular Biology (AREA)
• Life Sciences & Earth Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Health & Medical Sciences (AREA)
• Wood Science & Technology (AREA)
• Zoology (AREA)
• Textile Engineering (AREA)
• Adhesives Or Adhesive Processes (AREA)
• Preliminary Treatment Of Fibers (AREA)
• Treatment Of Fiber Materials (AREA)
• Nonwoven Fabrics (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=19786557

Family Applications (1)

Country Status (5)

Cited By (3)

• 0
  • BE BE420186D patent/BE420186A/xx unknown
  • NL NL43182D patent/NL43182C/xx active
• 1937
  • 1937-01-30 US US123254A patent/US2190744A/en not_active Expired - Lifetime
  • 1937-02-03 GB GB3230/37A patent/GB479240A/en not_active Expired
  • 1937-02-20 FR FR818165D patent/FR818165A/fr not_active Expired

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