CN1383965A

CN1383965A - Process for production of LYOCELL fiber with bamboo material

Info

Publication number: CN1383965A
Application number: CN 01117634
Authority: CN
Inventors: 许炯; 王学杰
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-04-30
Filing date: 2001-04-30
Publication date: 2002-12-11
Anticipated expiration: 2021-04-30
Also published as: CN1129680C

Abstract

The present invention discloses a preparation process of LYOCELL fiber with bamboo material. Bamboo material is crushed and pulped and the bamboo pulp is depurated in dense alkali solution, rinsed with chelating agent and dried to obtain bamboo cellulose with molecular polymerization degree. The bamboo cellulose in dissolved with N-methyl morpholine solution, depressed and heated at 120 deg.c to dewatering to obtain spinning slurry, and the slurry is extruded and spun at 90-130 deg.c and water phase solidifed to obtain LYOCELL fiber. The present invention is suitable for producing textile and papermaking material with bamboo.

Description

Bamboo processing bamboo LYOCELL fiber preparation method

The present invention relates to from the manufacturing process of cellulose containing raw material processing, production and fibre.

Disclose the LYOCELL fiber before this, it consists of cellulosic structure, and easily degraded is considered to the very good a kind of environmental protection fiber of combination property.It has the comfortableness of cotton fiber, the intensity of polyester fiber, the soft texture of the drapability of viscose rayon and silk.Its manufacture method is all at being that raw material carries out with timber, and is that raw material is made the fiber wood pulp with timber, certainly will will consume in a large number and show the forest tree resource that belongs in short supply, exists negative effect unavoidably for the sustainable economic development of society.

" silk " 2000 1 phase P21-22 page or leaf " the arrangement Tencel fabric technology of BTCA is explored " literary composition, it is the fiber that raw material is produced that the report of relevant LYOCELL fiber refers to timber.

The LYOCELL of indication also is to be the fiber of object processing and manufacturing with the wood pulp in 1998 12 phase P32-34 of " printing and dyeing " magazine page or leaf " discussion of the LYOCELL fabric dyeing and finishing technology " literary composition.

" international weaving Leader " contained " functional LYOCELL product " and " the whole of LYOCELL dyed " article of P74-77 of 1998 2 phase P4-8 of magazine page or leaf, the LYOCELL fiber of its indication also all is at being the fiber that raw material is produced with the wood pulp.

Show according to result for retrieval, have not yet to see the relevant document record of adopting bamboo processing bamboo LYOCELL fiber.

The objective of the invention is to propose a kind of with bamboo processing bamboo LYOCELL fiber preparation method.The bamboo that it adopts speed to give birth to is a raw material, according to the bamboo wood characteristics, improves technology, makes the free of contamination LYOCELL fiber with environment protection significance, for protection timber resources and ecological environment, for sustainable development creates conditions.

Principle of the present invention be a solvent based on adopting N-oxidation methyl morpholine (NMMO), with bamboo wood make pure, and the molecule aggregation degree is greater than 800 fiber bamboo pulp slurry, by spray thread, water solidifies the acquisition goods then.

Bamboo processing bamboo LYOCELL fiber preparation method of the present invention is characterized in that this preparation method's processing step is followed successively by:

1), bamboo wood is pulverized;

2), slurrying; Raw material is carried out the abundant boiling of high pressure under aqueous slkali and 160-180 ℃ of temperature, make bamboo pulp after floating through washing, oxygen;

3), bamboo pulp is further carried out concentrated base removal of impurities, rinsing, re-use the abundant rinsing purifying of chelating agent, dry then, obtain pure molecule aggregation degree greater than 800 bamboo cellulose;

4), with the pure molecule aggregation degree of N-oxidation methyl morpholine solution dissolving greater than 800 bamboo cellulose, decompression also heats up gradually 120 ℃ of following temperature, dehydration obtains the spinning slurry;

5), the spinning slurry pushes spray silk under 90-130 ℃ of temperature conditions, stretch and water solidifies and obtains bamboo LYOCELL fiber.

Good effect of the present invention is as follows:

1, bamboo LYOCELL fiber is compared with viscose rayon, and it has overcome environmental issue low because of viscose fiber wet strength and that production acid solution amount is brought greatly, has the prospect that alternative viscose rayon is produced;

2, cost of material is lower, and bamboo is as fast growing wood, and aboundresources, compares with short velveteen, and cost will reduce half, and bamboo is many at mountain planting, and its every per mu yield is than the high octuple of cotton;

3, multiple tracks impurity removal process in the step has solved in the bamboo fiber impurity to the harmful effect of spinning;

4, the bamboo cellulose that obtains, little molecule content is low, and the molecule aggregation degree is suitable as bamboo LYOCELL fibre spinning raw material greater than 800;

5, bamboo LYOCELL fiber quality can reach the same level of the LYOCELL fiber made from timber.

Technical process of the present invention is as follows:

Slurrying refining NMMO spinning

Bamboo wood----→ bamboo pulp----→ bamboo cellulose----→ spinning slurry----→ bamboo LYOCELL fiber.

Dissolving

Embodiment:

1, get new cizu of an age, section is pulverized; Get 100 parts of input autoclaves, add 500 parts of 55 grams per liter sodium hydroxide solutions, add 20 parts in vulcanized sodium again, boiling is 5 hours under 170 ℃ of temperature, takes the dish out of the pot, washes; Logical then chlorine is done bleaching and is handled, and washing; Carry out the post-bleach washing with clorox again, sodium hydroxide solution normal temperature rinsing with 17% 2 hours, usually the concentration range of concentrated base is chosen in the normal ranges of 3-25%, be washed to phenolphthalein and detect nondiscolouring, with 0.1%EDTA chelating agent solution washing 1 hour, obtain 20 parts of refining bamboo celluloses through dehydrating, record molecule aggregation degree 〉=800; N-oxidation methyl morpholine (NMMO) solvent dissolving in 1: 20 ratio and 50% is decompressed to less than 0.01Mpa, and dehydration also is warming up to 90 ℃ gradually, makes it to be dissolved into fully the spinning slurry; At last, push the spray silk, selecting spinneret is 24 holes, and the aperture is 0.1mm, and drawn, water solidify, reel, wash, and drying obtains bamboo LYOCELL fiber.

2, get two to three the age mao bamboon remove outer cuticle of a bamboo stem particle, section is pulverized; Get 100 parts of input autoclaves, add 500 parts of 50 grams per liter sodium hydroxide solutions, add 20 parts in vulcanized sodium again, boiling is 5 hours under 170-175 ℃ of temperature, takes the dish out of the pot, washes; Bleach after washing with the liquor natrii hypochloritis again, sodium hydroxide solution normal temperature rinsing with 15% 1 hour was washed to phenolphthalein and detects nondiscolouring, with 0.1%EDTA chelating agent solution normal temperature rinsing 1 hour, obtain 18 parts of refining bamboo celluloses through dehydrating, record molecule aggregation degree 〉=800; NMMO solvent dissolving in 1: 18 ratio and 50% is decompressed to less than 0.01Mpa, and dehydration also is warming up to 90 ℃ gradually, makes it to be dissolved into fully the spinning slurry; At last, push the spray silk, selecting spinneret is 7 holes, and the aperture is 0.2mm, and drawn, water solidify, reel, wash, and drying obtains bamboo LYOCELL fiber.

Claims

1, a kind of bamboo processing bamboo LYOCELL fiber preparation method of utilizing is characterized in that this preparation method's processing step is followed successively by:

1), bamboo wood is pulverized;