Spinning nozzle, process for producing fibrous mass, fibrous mass, and paper
AssigneeMitsubishi Chemical Corporation
InventorsYoshinobu Kotera, Yukio Onohara, Shima Nakanishi
Life of this patent
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Abstract
A spinning nozzle which has a perforated part in which ejection holes have been arranged in a density as high as 600-1,200 holes/mm2. This process for producing a fibrous bundle comprises ejecting a spinning dope having a viscosity as measured at 50° C. of 30-200 P from the ejection holes of the spinning nozzle to produce a fibrous bundle. This fibrous bundle has a single-fiber fineness of 0.005-0.01 dtex. By the wet-process direct spinning, a mass of nanofibers which are stably uniform and continuous can be produced at a high efficiency.
Claims8
A fibrous bundle, comprising:
- a plurality of fibers having a single-fiber fineness of at least 0.005 dtex to no more than 0.01 dtex,
- wherein the fibrous bundle has a total fineness of at least 4×103 dtex to no more than 8×105 dtex,
- the fibers in the fibrous bundle are acrylic fibers,
- the fibrous bundle comprises a long fibrous bundle comprising the fibers and having a length of more than 200 mm, and
- the fibers in the long fibrous bundle consist of a single material.
A fibrous bundle, comprising:
- a plurality of fibers having a single-fiber fineness of at least 0.005 dtex to no more than 0.01 dtex,
- wherein the fibrous bundle has a total fineness of at least 4×103 dtex to no more than 8×105 dtex,
- the fibrous bundle has a single fiber converted strength of at least 5.0 cN/dtex to no more than 7.0 cN/dtex,
- the fibrous bundle comprises a long fibrous bundle comprising the fibers and having a length of more than 200 mm, and
- the fibers in the long fibrous bundle consist of a single material.
A paper, comprising:
- at least 80% by mass to no more than 85% by mass of a plurality of fibers having a single-fiber fineness of at least 0.005 dtex to no more than 0.01 dtex, the fibers comprising at least one selected from the group consisting of cellulose, cellulose acetate, a cellulose derivative other than cellulose acetate, and a polyacrylonitrile-based polymer,
- wherein the fibers have a length of at least 3 mm to no more than 10 mm, and the paper has a density of at least 3 g/m2 to no more than 30 g/m2.
A long fibrous bundle, consisting of:
- a plurality of acrylic fibers having a single-fiber fineness of at least 0.005 dtex to no more than 0.01 dtex,
- wherein the long fibrous bundle has a total fineness of at least 4×103 dtex to no more than 8×105 dtex and a length of more than 200 mm.
Dependencies are inferred from the claim text.