Ultrashort viscose fiber in paper making, and manufacturing method

Abstract

The present invention relates to an ultrashort viscose fiber for making paper and its production method. Its fiber length is 4.8mm-5.2mm, and its specification is 1.67-5.56 dtex X 5-10mm, and its raw material composition includes (by wt%) 42-45% of cellulose fiber and 55-58% of water. Its production method is characterized by that its desulfurization heating process adopts steam ejector external circulation heating process, it uses the spray head with 54100 apertures to make spinning process and its guide rod is made of aluminium oxide material. Its production process successively includes the following steps: impregnation, pressing, pulverizing, ageing, sulfonation, dissolving, filtering, defoaming, secondary filtering, and spinning, both baths, drawing, cutting and packing.

Description

technical field

[0001] The invention relates to viscose fiber and a production method, in particular to a method for producing ultra-short viscose fiber for papermaking. Background technique

[0002] The development of ordinary viscose staple fiber has a history of about 100 years, and its quality index requirements and inspection methods can be found in GB / T14463-1993 "Viscose staple fiber" standard. This viscose long-bundle fiber is generally used in flocking, decoration and other industries through post-spinning. There are no reports for ultra-short viscose fibers and production methods thereof for papermaking. Contents of the invention

[0003] The technical problem to be solved by the present invention is to provide a kind of ultra-short viscose fiber for papermaking which uses cellulose fiber as raw material to produce high-grade ultra-short viscose fiber and its production method.

[0004] Solve the above-mentioned technical problem and adopt following technical s...

Examples

Embodiment ( 1

[0046] 1. Dipping:

[0047] Temperature: 51.3°C, time: 27 minutes, alkali concentration: 224.6g / L, relative amount of V-388 added to the methylcellulose content (percentage by weight): 0.55%.

[0048] 2. Mature:

[0049] Temperature: 52°C, viscosity 47mp

[0050] 3. Yellowing:

[0051] Addition of carbon disulfide to cellulose (weight percentage) 30%, yellowing time: 29 minutes, initial temperature 17°C, final temperature: 36.1°C

[0052] 4. Post-dissolution: temperature 18°C, time: 61 minutes

[0053] 5. Spinning

[0054] Acid bath: sulfuric acid concentration: 106g / L, sodium sulfate concentration: 325g / L, zinc sulfate concentration: 12.4g / L, temperature: 47.5°C, acid bath drop: 4.5g / L

[0055] Second bath: temperature 62°C, sulfuric acid concentration: 48g / L

[0056] 6. Drafting and plasticizing bath

[0057] Total draft: 1.2 times, plasticizing bath concentration: 13g / L, temperature: 93 degrees

[0058] 7. Refining

[0059] First water washing at 55°C, desulfurizat...

Embodiment ( 2

[0062] 1. Dipping:

[0063] Temperature: 51° C., time: 27 minutes, alkali concentration: 225 g / L, relative amount of V-388 added to the methylcellulose content (percentage by weight): 0.55%.

[0064] 2. Mature:

[0065] Temperature: 52°C, viscosity 46.5mp

[0066] 3. Yellowing:

[0067] Addition of carbon disulfide to cellulose (weight percentage) 31%, yellowing time: 30 minutes, initial temperature 17°C, final temperature: 36.1°C

[0068] 4. Post-dissolution: temperature 18°C, time: 59 minutes

[0069] 5. Spinning

[0070] Acid bath: sulfuric acid concentration: 105g / L, sodium sulfate concentration: 328g / L, zinc sulfate concentration: 12.8g / L, temperature: 46°C, acid bath drop: 3.9g / L

[0071] Second bath: temperature 61°C, sulfuric acid concentration: 42g / L

[0072] 6. Drafting and plasticizing bath

[0073] Total draft: 1.2 times, plasticizing bath concentration: 12.4g / L, temperature: 94 degrees

[0074] 7. Refining

[0075] First water washing at 53°C, desulfurizati...

Embodiment ( 3

[0079] 1. Dipping:

[0080] Temperature: 51° C., time: 28 minutes, alkali concentration: 225.6 g / L, relative amount of V-38 added to the methylcellulose content (weight percent): 0.55%.

[0081] 2. Mature:

[0082] Temperature: 52°C, viscosity 47.4mp

[0083] 3. Yellowing:

[0084] Addition of carbon disulfide to cellulose (weight percentage) 31.5%, yellowing time: 27 minutes, initial temperature 17°C, final temperature: 36.1°C

[0085] 4. Post-dissolution: temperature 18°C, time: 60 minutes

[0086] 5. Spinning

[0087] Acid bath: sulfuric acid concentration: 107g / L, sodium sulfate concentration: 315g / L, zinc sulfate concentration: 12.3g / L, temperature: 47°C, acid bath drop: 4.8g / L

[0088] Second bath: temperature 58°C, sulfuric acid concentration: 44g / L

[0089] 6. Drafting and plasticizing bath

[0090] Total draft: 1.0 times, plasticizing bath concentration: 13.8g / L, temperature: 96 degrees

[0091] 7. Refining

[0092] The first water wash is 54°C, the desulfuri...

technical field

[0001] The invention relates to viscose fiber and a production method, in particular to a method for producing ultra-short viscose fiber for papermaking. Background technique

[0002] The development of ordinary viscose staple fiber has a history of about 100 years, and its quality index requirements and inspection methods can be found in GB / T14463-1993 "Viscose staple fiber" standard. This viscose long-bundle fiber is generally used in flocking, decoration and other industries through post-spinning. There are no reports for ultra-short viscose fibers and production methods thereof for papermaking. Contents of the invention

[0003] The technical problem to be solved by the present invention is to provide a kind of ultra-short viscose fiber for papermaking which uses cellulose fiber as raw material to produce high-grade ultra-short viscose fiber and its production method.

[0004] Solve the above-mentioned technical problem and adopt following technical s...

Examples

Embodiment ( 1

[0046] 1. Dipping:

[0047] Temperature: 51.3°C, time: 27 minutes, alkali concentration: 224.6g / L, relative amount of V-388 added to the methylcellulose content (percentage by weight): 0.55%.

[0048] 2. Mature:

[0049] Temperature: 52°C, viscosity 47mp

[0050] 3. Yellowing:

[0051] Addition of carbon disulfide to cellulose (weight percentage) 30%, yellowing time: 29 minutes, initial temperature 17°C, final temperature: 36.1°C

[0052] 4. Post-dissolution: temperature 18°C, time: 61 minutes

[0053] 5. Spinning

[0054] Acid bath: sulfuric acid concentration: 106g / L, sodium sulfate concentration: 325g / L, zinc sulfate concentration: 12.4g / L, temperature: 47.5°C, acid bath drop: 4.5g / L

[0055] Second bath: temperature 62°C, sulfuric acid concentration: 48g / L

[0056] 6. Drafting and plasticizing bath

[0057] Total draft: 1.2 times, plasticizing bath concentration: 13g / L, temperature: 93 degrees

[0058] 7. Refining

[0059] First water washing at 55°C, desulfurizat...

Embodiment ( 2

[0062] 1. Dipping:

[0063] Temperature: 51° C., time: 27 minutes, alkali concentration: 225 g / L, relative amount of V-388 added to the methylcellulose content (percentage by weight): 0.55%.

[0064] 2. Mature:

[0065] Temperature: 52°C, viscosity 46.5mp

[0066] 3. Yellowing:

[0067] Addition of carbon disulfide to cellulose (weight percentage) 31%, yellowing time: 30 minutes, initial temperature 17°C, final temperature: 36.1°C

[0068] 4. Post-dissolution: temperature 18°C, time: 59 minutes

[0069] 5. Spinning

[0070] Acid bath: sulfuric acid concentration: 105g / L, sodium sulfate concentration: 328g / L, zinc sulfate concentration: 12.8g / L, temperature: 46°C, acid bath drop: 3.9g / L

[0071] Second bath: temperature 61°C, sulfuric acid concentration: 42g / L

[0072] 6. Drafting and plasticizing bath

[0073] Total draft: 1.2 times, plasticizing bath concentration: 12.4g / L, temperature: 94 degrees

[0074] 7. Refining

[0075] First water washing at 53°C, desulfurizati...

Embodiment ( 3

[0079] 1. Dipping:

[0080] Temperature: 51° C., time: 28 minutes, alkali concentration: 225.6 g / L, relative amount of V-38 added to the methylcellulose content (weight percent): 0.55%.

[0081] 2. Mature:

[0082] Temperature: 52°C, viscosity 47.4mp

[0083] 3. Yellowing:

[0084] Addition of carbon disulfide to cellulose (weight percentage) 31.5%, yellowing time: 27 minutes, initial temperature 17°C, final temperature: 36.1°C

[0085] 4. Post-dissolution: temperature 18°C, time: 60 minutes

[0086] 5. Spinning

[0087] Acid bath: sulfuric acid concentration: 107g / L, sodium sulfate concentration: 315g / L, zinc sulfate concentration: 12.3g / L, temperature: 47°C, acid bath drop: 4.8g / L

[0088] Second bath: temperature 58°C, sulfuric acid concentration: 44g / L

[0089] 6. Drafting and plasticizing bath

[0090] Total draft: 1.0 times, plasticizing bath concentration: 13.8g / L, temperature: 96 degrees

[0091] 7. Refining

[0092] The first water wash is 54°C, the desulfuri...