JPS6081308A - Scouring of flax - Google Patents

Abstract

PURPOSE:To obtain soft fiber having long fiber length and good feeling, by washing flax sliver after scouring process with water and squeezing it by roller repeatedly, treating it with an enzyme. CONSTITUTION:The flax sliver 10 after scouring process is passed through the squeezing rollers 1, 2, 3, and 4 as it is being sprayed with water from the water spray pipe 9, so the squeezing action is applied to the sliver repeatedly while it is being sprayed with water. The flax sliver 10 is then immersed (preferably for 12hr) in an enzymatic solution (preferably containing 0.5pt.vol. enzyme in 100pts. vol. water at 60 deg.C), to give the desired yarn.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a process for treating natural bast fiber raw materials, particularly flax, to make them suitable for spinning.

Among hemp, which is a raw material for natural bast fibers, flax has excellent toughness, and in particular has the strongest resistance to water among natural fibers, so it is widely used for clothing as well as various textiles and ropes. has been done.

By the way, flax fibers are refined from the bast under the epidermis, which is a combination of cellulose, lignin, and pectin, so in order to extract the fiber from it, , it is necessary to remove lignin and pectin, but flax has a very short fiber cell length.
If lignin and pectin were completely removed, long fibers would no longer be produced. Therefore, in the past, the original grass was submerged in water to make it easier to separate the woody part and the bast part, and then mechanically plowed, followed by scouring with only caustic treatment, which left most of the lignin and pectin and prevented the cellulose from becoming short. The method is to remove some of the lignin and pectin after making it into yarn or cloth. Therefore, the yarn or cloth loses its weight significantly, resulting in an extremely low yield and a major disadvantage in that it is not possible to stably obtain the desired yarn or cloth.

Furthermore, since the lignin and pectin are removed after being made into thread or cloth, the removal of the lignin and pectin is insufficient, resulting in disadvantages such as easy wrinkles and a hard texture.

The present invention solves the drawbacks of flax fiber # products by using sliver obtained through conventional mechanical plowing.
At the stage before the spinning process, lignin from flax fibers is extracted from flax fibers using a novel processing method characterized by scouring in the sliver state, repeating the roller washing and roller squeezing process, and then enzymatic treatment. The aim is to make it possible to remove fibers and pectin easily and to obtain fibers with good texture at a high yield.

In the present invention, as in the conventional method, the flax sliver obtained by soaking the original grass in water to make it easier to separate the woody part and the bast part, and then mechanically plowing the flax sliver in its sliver state,
use First, a scouring process is performed. Conventional methods can also be used for this scouring step. Through this treatment, most of the lignin and pectin in the flax slivers are separated from the fibers and become floating between the fibers.

After the scouring process, the flax slivers that have undergone the same process are washed with water and squeezed with a roller. This treatment step is one important step in the present invention. In this step, for example, a washing roller squeezing device as shown in the figure is used.

In this device, a pair of upper and lower squeeze rollers 1, 2, 3.4 are arranged in series in multiple stages, followed by a conveyor 5, and further followed by a pair of upper and lower squeeze rollers 6, 6, 7.7 in series. from the first squeezing roller l to the conveyor 5
The structure is such that a fountain pipe 9 having many nozzles 8, 8, . . . is arranged in the upper part thereof. Then, the flax sliver 10 that has undergone the above-mentioned scouring process is floated on the supply guide plate 11 installed in this device, and is inserted into the first squeezing roller 1, and then sequentially squeezed on the squeezing rollers 1, 2, and so on.
3.4, during which water is sprayed from the fountain pipe 9 towards the flax sliver 10. Therefore, the flax slivers 10 are arranged in multiple stages while being washed by the jet water, and are warped by the respective squeezing rollers 1, 2, . . . and subjected to a squeezing action. Due to the repeated action of water washing and roller squeezing, after the above-mentioned scouring process,
Pectin and lignin present between the fibers in the floating state are pushed out, washed with water, and physically forcibly removed. In particular, pectin and lignin present deep within the fiber bundle are successively pushed out to the surface and removed by the jetting water.

However, since flax fibers are made up of short fibers joined together, it is difficult to remove all of the pectin and lignin that act as bonding stages for these short fibers. Since this may cause inconvenience, it is necessary to leave a small amount of pectin and lignin remaining to the extent that the fibers remain bonded to each other. Therefore, in the water washing roller squeezing process, it is important to carry out the treatment to the extent that only a small amount of pectin and lignin remains. Existing in the state will result in less unevenness. When such unevenness occurs, hard portions inevitably occur in the fibers, which also causes deterioration in feel and the like. In the present invention, enzymatic treatment is subsequently performed to remove such residual unevenness of pectin and lignin. In this step, flax slivers are immersed in a solution containing about 0.5 volumes of enzyme per 100 volumes of warm water at about 60°C, and left for about 12 hours. In this enzyme treatment step,
The solution penetrates well, and the solution acts on the remaining pectin and lignin, causing it to be eluted and dispersed throughout the fibers, resulting in a leveled state.

The treated flax slivers are then washed with water, drained with squeezing rollers, added with flax oil, squeezed with squeezing rollers, and dried to complete the entire process.

According to the present invention, most of the lignin and pectin from the flax sliver is removed, except for those that connect the short fibers to maintain a long fiber length, and the flax sliver is used for wool spinning or binding. This makes it possible to obtain a material with a long fiber length that is flexible and suitable for hanging.

[Brief explanation of drawings]

The drawing is a schematic diagram of an apparatus applied in the washing roller squeezing process in the present invention.

Claims (1)

[Claims] A flax scouring method characterized in that flax slivers obtained by mechanically plowing flax raw grass are subjected to a scouring process, followed by repeated roller washing and roller squeezing processes, followed by enzymatic treatment. .