JP2681514B2 - Scouring of natural fibers with lactic acid bacteria - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a refining method for obtaining a raw material for spinning natural fibers such as flax.

2. Description of the Related Art Natural fibers are extracted from the stems of raw material plants. The stems are composed of a wood part, a fiber part and an outer skin part, and since these are fixed by a glue, they are usually smelted by natural fermentation by flooding.

That is, a proper amount of water is supplied to the raw material, and the raw material is deposited and stored in a natural state for a certain period of time, and the pectin substance is decomposed and removed by a pectin degrading enzyme possessed by a natural bacterium or a microorganism such as a fungus, and the fiber is taken out.

However, various microorganisms involved in natural fermentation are not only effective for scouring, but also some of them decompose fibrin, which damages the fiber itself, and in some cases excessive scouring, It tends to reduce fiber quality and yield. In addition, a bad odor is generated remarkably by anaerobic bacteria, and the refining is not constant, and it is difficult to adjust the refining aptitude.

Further, as a pure fermentation scouring method using artificially suitable bacteria, there is a method of utilizing aerobic bacteria, growth of the strain,
Maintenance is troublesome, and the effect is unclear depending on the circulation conditions.

In addition, there are chemical refining methods that use acids and alkalis, both of which are costly, and the reaction occurs rapidly and partially, leading to excessive refining, causing fiber bundles to split, and There is a risk of decomposition of the element.

Problems to be Solved by the Invention As described above, the artificial pure fermentation scouring method and the chemical scouring method have various drawbacks, and development of a more excellent scouring method is desired.

In view of the present situation, the present invention provides an excellent refining method that prevents damage to fibers and suppresses the generation of malodor.

Means for Solving the Problems In order to achieve the above object, the natural fiber refining method of the present invention is a natural fiber raw material obtained by treating a lactic acid bacterium with a nutrient solution or a treatment solution with a nutrient agent and a protective agent. And keep it for a certain period.

Action If the above-mentioned treatment liquid and water are sprinkled on the natural fiber raw material and kept as it is, the fiber bundle initially swells due to water, and tears occur at various places, so that lactic acid bacteria and water easily penetrate into the inside. Then, the soluble substance is dissolved, and pectin and lignin which are insoluble components become soft. During this period, the pectic substance is dissolved by the lactic acid generated from the grown lactic acid bacterium, given appropriate water, temperature and nutrients. Good scouring is performed by such physical and chemical actions.

Lactic acid is safe and harmless to the human body, and produces a unique fragrance when opened, but this is temporary, and lactic acid bacteria die in the atmosphere and do not deteriorate the fiber.

The above-mentioned lactic acid bacterium is Lactobacillus plantarum, and the bacterium solution consists of the number of bacteria n × 10 ^{10 to} 11 ^{11 /} cc and PH 3.5 to 7. Also, nutrients use glucose, amino acids, minerals, etc.,
The protective agent consists of whey or the like.

In some cases, the treatment liquid having the above-mentioned composition may not sufficiently dissolve the sticky pectin substance by spraying less than 2% by weight with respect to the natural fiber raw material. Further, since it can be sufficiently dissolved by spraying up to 5% by weight, it may be sprayed in the range of 2 to 5% by weight.

Water is necessary to permeate the treatment liquid into the raw material, but spraying less than 25% by weight does not have a sufficient effect, and water exceeding 80% by weight does not change the spraying effect.
It may be applied in the range of weight%.

Example 0.5% by weight / 2% by weight of lactic acid bacteria liquid per 1 kg of jute raw material
Glucose and 1% by weight per 1 kg of jute raw material / 1 kg of jute raw material
The whey was added to make a treatment solution. In this processing liquid
20% by weight, 40% by weight, 60% by weight / Add moisture per kg of jute raw material and use a spray to produce jute raw material (raw material A and raw material B
(2 types) were sprayed and sprayed uniformly.

And the jute raw material sprayed with the treatment liquid has a high density and weight.
Put it in a donut shape of 50-100kg. A plurality of the doughnut-shaped raw materials were stacked, sealed in a light-shielding flexible container, lightly degassed using a degassing pump, and sealed. In this state, it was stored in a room at room temperature for 2 weeks for scouring.

Further, for comparison, raw materials A and B were refined by natural fermentation by submersion according to a conventional method (referred to as comparative examples).

Regarding the fibers of the raw material A produced by the above refining, the same amount of samples were taken from the present invention and the comparative example, and the distribution of the fiber length was investigated. The result is shown in FIG. Figure a is the fiber according to the embodiment of the present invention, and figure b is the fiber of the comparative example. From these results, the longest fiber of the fiber of the present invention is 600 mm or more, which is longer than the longest fiber of 500 mm of the comparative example. The shortest fiber is also longer than that of the comparative example, and the fiber is long as a whole. From this, it is understood that long fibers can be obtained by refining according to the present invention.

In addition, samples were taken from the fibers of the raw material A and the raw material B of the respective examples and comparative examples of the present invention, and tested for strength, variation and elongation. Table 1 shows the results.

From the above results, it can be seen that the fibers refined according to the present invention are superior in properties to those obtained by the conventional method.

EFFECTS OF THE INVENTION The present invention sprays a treatment liquid mainly composed of lactic acid and water on a natural fiber raw material to dissolve pectin clinging to the raw material, facilitate separation of fiber bundles, and sterilize various bacteria. It is possible to prevent damage to fibers and spoilage, suppress the generation of bad odors, generate aroma, and perform good scouring. As a result, quality improvement and process shortening are brought about.

[Brief description of the drawings]

FIG. 1 is a graph showing the length distribution of fibers refined from a natural fiber raw material, FIG. A shows the result of the practice of the present invention, and FIG.

Claims (2)

(57) [Claims] 1. A method for scouring natural fibers using lactic acid bacteria, which comprises spraying a treatment liquid containing a lactic acid bacterium with a nutrient added thereto and water and maintaining the raw material for a certain period of time. 2. A method for scouring a natural fiber by a lactic acid bacterium, which comprises spraying a treatment liquid in which a nutrient and a protective agent are added to lactic acid bacterium and water onto a natural fiber raw material and holding it for a certain period of time.