JPH02241701A - Dyeing method of rush - Google Patents

Abstract

PURPOSE:To improve the fastness to daylight of rush by a method wherein rush caules, both ends of each of which are cut off, are swollen with water and reactive dye is penetrated by means of penetrating agent in the rush cauline pitches from both cut ends of the rush caules. CONSTITUTION:By cutting off both ends of cut down rush caules to lengths, sponge-like cauline pitches show themselves at both the cut ends of each rush caules. When the rush caules cut to lengths are immersed in water, they swell by absorbing the water in the cauline pitches. Swollen rush caules, the ratio of dried rush caules to water content of which is made to be 1:(5-10), are immersed in water, in which reactive dye (vinyl sulfone type one is used) is dissolved. The dye is set to be 1-4wt.% of the rush caulis. The dyeing is performed by turning the rush caules from side to side every predetermined period of time in the water, to scouring and penetrating agent (nonionic type one) is added and which is on the boil. After the finish of dyeing and the switching-off of washing liquid, the rush caules are washed in water and, after that, dried in the sun or with a drier. Thus, since the reactive dye passes through the pitches of rush caules and reacts to skin fibers from both sides of the rush skin so as to be able to dye hard and close skin fibers in order to be able to dye rush caules with reactive dye, the fastness to daylight and fastness to rubbing can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a method for dyeing rushes with reactive dyes.

``Conventional technology'' Until now, only basic dyes have been used for dyeing rushes. The maximum dye concentration is 1%, and various colors are created by mixing several colors of dyes (4 ratios: 1:30). The dyeing method involves melting the dye at around 60 degrees Celsius, adding the rushes, and continuing dyeing at a boil for 20 to 30 minutes while stirring. It is then washed with water and dried either on the ceiling or in a dryer (currently most dyers do not wash it with water). Sunlight fastness is determined by direct sunlight test method (JIS L 0841-74
), the measurement result is 1st to 2nd grade. In addition, the fastness test against friction (JIS L 0849-71) is 2nd to 3rd grade in a dry state (1st grade if not washed with water) and 1st to 2nd grade in a wet state. In other words, basic dyes have poor sunlight fastness and friction fastness, so if they are commercialized, they will fade quickly.
Also, because of its low friction fastness, there was a problem of it adhering to clothing and other surfaces. Therefore, an attempt was made to use reactive dyes instead of basic dyes for dyeing rushes.Reactive dyes include dichlorotriazine type for low temperature reaction type, vinyl sulfone type for medium temperature reaction type, and monochlorotriazine type for high temperature reaction type. be. This reactive dye has conventionally been used to dye Momen, rayon, etc., and an example of the dyeing method is as follows.

Alkali (trisodium phosphate etc. Jog/I2), salt (
Dye is added to 50g/β) of soda ash, etc. and dyed at the temperature and time shown in the table below.

40-60°C However, when rushes were dyed using this method, it was found that it was impossible to dye rushes.

[17 Problems to be Solved by the Invention] The present invention dyes rushes with the above-mentioned reactive dye, and has high one-sunlight fastness and friction fastness, and when commercialized, has little inferiority and is suitable for wearing as clothes or other items. The purpose is to obtain dyed rushes that are not dyed. .

In order to achieve the above object, the present invention is characterized in that a rush stem cut at both ends is swollen with water, and a reactive dye is infiltrated into the stem pulp from both ends using a penetrating agent. Constructed using rush dyeing method.

``Operation'' Therefore, the epidermis of the rush stem is dyed by the reactive dye that has penetrated into the spongy stem pulp and the reactive dye outside the epidermis, which reacts with the fibers of the epidermis from the inside and outside. In the swollen stem pulp (i
: The filled water is replaced by a penetrant, and the reactive dye permeates into the spongy stem pulp along with the penetrant.

"Example" When cutting both ends of a harvested rush stem into 1,100 ml pieces, spongy stem pulp appears at both ends.When soaking a rush stalk of a fixed size in water for more than 2 hours, it swells to the specified size. The rush stems are immersed in water, and a reactive dye (vinyl sulfone type is used) is dissolved in the water.The weight percent of the dye to the rush stems is 1 to 4.The scouring penetrant ( The rush stems are dyed in a boiling state for 1 hour and 30 minutes to 2 hours, turning the rush stems every 15 minutes for about a day. It is slightly longer, and shorter for high-temperature-reactive monochlortriazine types.The penetrating agent may also be a moisture penetrating agent (IIa ionic type, non-ionic type) or a penetrating dyeing aid (non-ionic type). I can't support it.
After dyeing, drain the washing liquid, wash with water, and dry in the sun or in a dryer. Water, dye, and penetrant are added to this washing solution (dyeing residue) to perform the next dyeing process, and the dyeing becomes more uneven as the number of times dyeing increases from the first dyeing process to the second and third dyeing operations. It disappears. The dyeing pot is not made of copper, but made of stainless steel.

``Effect'' In the present invention, the method described above allows the reactive dye to pass through the stem pulp of the rush stem and react with the epidermal fibers from the front and back of the rush epidermis, dyeing the hard and dense epidermal fibers. Therefore, the sunlight fastness and friction fastness can be improved. Therefore, it is possible to develop rush products in fields that could not be solved with basic dyes until now, such as high-grade flower α and colored tatami mats.

(Experiment example) A Japanese Igusa stem cut at both ends to a length of 1100 m + m was dyed as described above and dyed using the direct sunlight method (JIS I, 0841).
-7J), the sunlight fastness is grade 4 to 5, and as a result of the fastness test (JIS L0849-71), the friction fastness is grade 5 in the dry state and grade 3 in the wet state. Ta.

Claims (1)

[Claims] (1) A rush dyeing method characterized by swelling a rush stem with both ends cut in water, and allowing a reactive dye to penetrate into the stem pulp from both ends using a penetrating agent.