US2852332A - Preparation of thin sections of material from melts of cellulose esters - Google Patents

Preparation of thin sections of material from melts of cellulose esters Download PDF

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Publication number
US2852332A
US2852332A US419922A US41992254A US2852332A US 2852332 A US2852332 A US 2852332A US 419922 A US419922 A US 419922A US 41992254 A US41992254 A US 41992254A US 2852332 A US2852332 A US 2852332A
Authority
US
United States
Prior art keywords
fiber
filament
strength
jet
knot
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US419922A
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English (en)
Inventor
Gaebel Reinhold
Neugebauer Helmut
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hercules Powder Co
Original Assignee
Hercules Powder Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hercules Powder Co filed Critical Hercules Powder Co
Application granted granted Critical
Publication of US2852332A publication Critical patent/US2852332A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/08—Melt spinning methods
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F2/00—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof
    • D01F2/24—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof from cellulose derivatives
    • D01F2/28—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof from cellulose derivatives from organic cellulose esters or ethers, e.g. cellulose acetate

Definitions

  • Example 1 Melted cellulose acetate is extruded from a jet having a hole diameter of 0.1 mm. at a rate of ca. 2 cm./sec.
  • the resulting fiber is drawn Off at a rate of 50 cm.
  • the fiber has a knot-strength of 6%.
  • Example 2 The same fiber is drawn off at a rate of 3 cm./sec.. and wound.
  • the fiber has a knot-strength of and scarcely shows any illumination under the polarizing microscope, while the fiber of Example 1 lights up very brightly, indicating hot-drawing.
  • Example 3 Examples 1 and 2 are varied in that the mass is made more viscous by means of a lower melting temperature.
  • the fiber now has a rate of ca. 1.5 cm./ sec. after the jet and is wound at this velocity.
  • the measured knot-strength is 60% and the fiber diameter is 0.19 mm, thus thicker than would correspond to the jet hole diameter.
  • Example 4 A jet having a diameter of 0.2 mm. is not screwed on to the outside of the melt tube as usual, but is screwed onto the melt tube in such a way that the heating jacket extends about 3 cm. beyond the bottom of the jet.
  • the fiber appears outside the heating jacket at a rate of 12 cm./sec. and is wound at this velocity.
  • the fiber has a diameter of only 0.08 mm. and a knot-strength of 60%.
  • the thread or fibers spun in accordance with this process may be further subjected to a stretching or saponification process.
  • Small quantities of plasticizers which are not capable of causing any increase in knot-strength per se, may be added to the melt, without altering the principle of the invention.
  • the process is not limited to cellulose acetate, but may be applied to other cellulose esters, in so far as these have a tendency, based on their structure, toward poor knot-strength.
  • a method for the production of filaments of good knot-strength by extrusion of melted cellulose ester through a spinneret which comprises the following steps: extruding the melted cellulose ester in the form of a molten filament from the spinneret into a heating zone at the bottom of the spinneret, additionally heating the molten filament in the heating zone as it passes therethrough to reduce its surface tension and to thereby reduce its cross-sectional area with corresponding elongation thereof, passing the molten filament so produced from the heating zone and solidifying it by cooling, and collecting the solidified filament at a rate to prevent any substantial drawing of the filament during any of the preceding recited steps.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Artificial Filaments (AREA)
US419922A 1953-07-15 1954-03-30 Preparation of thin sections of material from melts of cellulose esters Expired - Lifetime US2852332A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2852332X 1953-07-15

Publications (1)

Publication Number Publication Date
US2852332A true US2852332A (en) 1958-09-16

Family

ID=7999705

Family Applications (1)

Application Number Title Priority Date Filing Date
US419922A Expired - Lifetime US2852332A (en) 1953-07-15 1954-03-30 Preparation of thin sections of material from melts of cellulose esters

Country Status (3)

Country Link
US (1) US2852332A (forum.php)
BE (1) BE530418A (forum.php)
FR (1) FR1109130A (forum.php)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3062611A (en) * 1959-10-26 1962-11-06 Eastman Kodak Co Method of making a roughened tow

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB541724A (en) * 1940-06-06 1941-12-09 British Celanese Improvements in the manufacture of artificial filaments, ribbons and the like
US2303338A (en) * 1939-09-21 1942-12-01 Celanese Corp Preparation of artificial filaments or threads
US2303340A (en) * 1939-05-16 1942-12-01 Celanese Corp Production of artificial materials
US2324397A (en) * 1941-06-04 1943-07-13 Du Pont Method for production of continuous structures
US2336159A (en) * 1938-11-30 1943-12-07 Hercules Powder Co Ltd Method of preparing filaments

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2336159A (en) * 1938-11-30 1943-12-07 Hercules Powder Co Ltd Method of preparing filaments
US2303340A (en) * 1939-05-16 1942-12-01 Celanese Corp Production of artificial materials
US2303338A (en) * 1939-09-21 1942-12-01 Celanese Corp Preparation of artificial filaments or threads
GB541724A (en) * 1940-06-06 1941-12-09 British Celanese Improvements in the manufacture of artificial filaments, ribbons and the like
US2324397A (en) * 1941-06-04 1943-07-13 Du Pont Method for production of continuous structures

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3062611A (en) * 1959-10-26 1962-11-06 Eastman Kodak Co Method of making a roughened tow

Also Published As

Publication number Publication date
FR1109130A (fr) 1956-01-23
BE530418A (forum.php)

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