Method for setting end portion of bundle of thread-like bodies

• US 4,049,765 A
• Filed: 04/26/1976
• Issued: 09/20/1977
• Est. Priority Date: 05/02/1975
• Status: Expired due to Term

• Current Assignee: Nippon Zeon Co., Ltd. (BASF SE)
• Original Assignee: Nippon Zeon Co., Ltd. (BASF SE)
• Inventors: Yamazaki, Masahiro
• Primary Examiner(s): Hoag, Willard E.
• Application Number:
  US05/679,988
• Time in Patent Office: 512 Days
• Field of Search: 264/261, 264/263, 264/264, 264/85, 264/88, 264/265, 264/298, 264/82, 264/271, 264/279
• US Class Current: 264/261
• CPC Class Codes: B01D 63/0223 by fixing the hollow fibres prior to encapsulation
• CPC Class Codes: Y10T 29/49801 Shaping fiber or fibered material

Abstract

An end portion of a bundle of thread-like bodies to be set is dipped into a solidifiable liquid. At least a part of said bundle, adjacent to the predetermined level of the solidifiable liquid, is contacted with a specific liquid or gas which substantially prevents wicking of said solidifiable liquid along said thread-like bodies due to capillary action. The solidifiable liquid is not drawn up through the bundle beyond predetermined level of the solidifiable liquid, and solidified at the predetermined level.

Claims

1. A method for setting an end portion of a bundle of thread-like bodies so that capillary action is reduced between said bodies, comprising the steps of:

A. dipping an end portion of a bundle of thread-like bodies into a solidifiable liquid, said bodies being so disposed that capillaries exist between said bodies;

B. contacting at least that part of said bundle which is immediately adjacent said end portion with a polar gas selected from the group consisting of ammonia gas, a primary amine gas and a secondary amine gas and mixtures thereof, said contacting step occuring prior to exposure of that adjacent part to said liquid whereby said gas acts to prevent said capillary action; and

C. permitting said solidifiable liquid to solidify.

2. A method for setting an end portion of a bundle of thread-like bodies according to claim 1, in which silicone resin composition is used as said solidifiable liquid.

3. A method for setting an end portion of a bundle of thread-like bodies according to claim 1, in which epoxy resin composition is used as said solidifiable liquid.

4. A method for setting an end portion of a bundle of thread-like bodies according to claim 1, in which polyurethane composition is used as said solidifiable liquid.

5. A method for setting an end portion of a bundle of thread-like bodies according to claim 1, in which said primary amine gas is selected from gaseous methylamine, gaseous ethylamine and vaporized aniline.

6. A method for setting an end portion of a bundle of thread-like bodies according to claim 1, in which said secondary amine gas is selected from gaseous dimethyl amine, gaseous diethylamine and vaporized methylaniline.

7. A method for setting an end portion of a bundle of thread-like bodies according to claim 1, in which said bundle is placed in a casing assembly, a part of said bundle, adjacent to a predetermined level of said solidifiable liquid, is contacted with said polar gas, and then said solidifiable liquid is solidified, whereby said end portion of said bundle is set and fixed to said casing assembly.

8. A method for setting an end portion of a bundle of thread-like bodies according to claim 7, in which a compressed gas is introduced into said casing assembly at the same time said end portion of said bundle is dipped into said setting liquid.

9. A method for setting an end portion of a bundle of thread-like bodies according to claim 7, in which said casing assembly is vertically arranged, said solidifiable liquid is introduced into a molding cavity attached to a lower end portion of said casing assembly to dip the lower end portion of said bundle into said solidifiable liquid, while the upper end portion of said bundle is held to keep said bundle at the right position in said casing assembly, said solidifiable liquid is solidified to form a fluid-tight cast wall member surrounding said thread-like bodies and engaging said casing assembly, and then the lower end portion of said cast wall member and said lower end portion of said bundle of said thread-like bodies extending through said cast wall member are severed or cut.

10. A method for setting an end portion of a bundle of thread-like bodies according to claim 7, in which said casing assembly is filled with said polar gas for some time, then said polar gas is purged from said casing assembly, and said end portion of said bundle is dipped into said solidifiable liquid.

11. A method for setting an end portion of a bundle of thread-like bodies according to claim 1, further comprising the steps of:

A. setting said bundle with said solidifiable liquid, contacting at least a part of said bundle adjacent to a predetermined level of said solidifiable liquid with said polar gas;

B. placing said set bundle within said casing assembly; and

C. fixing in fluid-tight relationship an end portion of said set bundle to said casing aeembly.