JPH0115631B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a method for improving the fastness of dyed synthetic fiber products, and in particular, a method for significantly improving the fastness to rubbing and washing of dyed synthetic fiber products treated with a finishing agent. The purpose is to provide a processing method. Generally, regarding synthetic fiber products (dyed products),
Depending on texture, physical properties, functionality, and other purposes, various finishing treatments are applied, such as flexible finishing, hard finishing, water/oil repellent finishing, anti-shrink/wrinkle finishing, and antistatic finishing. A major problem in these cases is that when such various finishing treatments are applied, the fastness of dyed textile products, such as abrasion fastness and washing fastness, decreases significantly (1 to 3 grade decrease). . This decrease in fastness significantly impairs the commercial value of textile products, so the type of finishing agent,
Currently, this decrease is suppressed by selecting a processing method, but this limits finishing processing, and there has been a demand for the development of a new processing method that prevents the decrease in fastness. To this end, resin and chemical manufacturers, as well as those involved in finishing, are working to develop finishing agents and processing methods that reduce the loss of fastness. The objective was to reduce the decrease or maintain the same level of fastness as much as possible, and it did not go beyond the original fastness of the dye. On the other hand, there are cases in which dyes themselves have good level dyeing properties but poor fastness, which makes their use difficult.Therefore, it is desired to develop an advantageous method for improving the fastness of such dyes. In view of such technical issues, the present inventors have
As a result of intensive studies to develop a method for significantly improving the fastness of dyed synthetic fiber products treated with finishing agents, the present invention was achieved. That is, the present invention
Dyed synthetic fiber products that have been treated with a finishing agent are made from an inorganic gas containing 10% or more oxygen at a gas pressure of 0.01 to 10 torr, with a discharge voltage of 400 volts or more,
The present invention relates to a method for improving the fastness of dyed synthetic fiber products, characterized in that the process is carried out while passing through an internal electrode type low temperature plasma region with an inter-electrode distance of 1 to 30 cm. According to the present invention, it is possible not only to prevent a decrease in fastness of dyed synthetic fiber products due to finishing processing, but also to improve the fastness of dyed synthetic fiber products compared to before finishing processing (improved by about 1 to 4 grades). As a result, restrictions on the types of finishing agents and processing methods are eliminated, making it possible to apply a variety of finishes to dyed textile products, and significantly increasing the commercial value of textile products. Next, the present invention will be explained in detail. The dyed synthetic fiber products to which the present invention is directed include woven, knitted or non-woven fabrics made of polyester fibers, nylon fibers, acrylic fibers, polypropylene fibers, acetate fibers, vinylon fibers, or blended fibers containing at least 50% by weight of these fibers; Includes all thread-like things. The dye used for dyeing is not particularly limited, and generally commercially available or developed dyes are appropriately selected and used. Processing agents used for finishing include:
Softening agents (silicone-based, hydrocarbon-based, etc.), hard finishing agents (melamine-based, urethane-based, vinyl acetate-based, polyester-based, etc.), water/oil repellent finishing agents (silicone-based, fluorine-based, etc.), shrink-proofing agents - Examples include anti-wrinkle finishing agents (urea-based, glyoxal-based, etc.). The processing conditions for finishing may be carried out according to conventionally known methods, and the method itself is not limited. In the present invention, dyed synthetic fiber products that have been treated with such finishing agents are subjected to low-temperature plasma treatment, but in order to proceed with this treatment efficiently, one side of the dyed synthetic fiber product is grounded in a device that can reduce pressure. Using an internal electrode type low-temperature plasma generator with a counter-discharge electrode, the target dyed synthetic fiber product is set on the earth-side electrode in this device, and while inorganic gas is flowing under reduced pressure, 40 This is carried out by a method in which both sides of the dyed synthetic fiber product are treated with low-temperature plasma generated by applying a discharge voltage of volts or more to cause glow discharge. Inorganic gases used here include oxygen gas, air, or helium, neon, argon, nitrogen, nitrous oxide, nitric oxide, nitrogen dioxide, carbon monoxide, containing at least 10% by volume of oxygen gas. Examples include mixed gases with one or more inorganic gases such as carbon dioxide, bromine cyanide, sulfur dioxide gas, and hydrogen sulfide. The oxygen gas etches the surface of the coating, effectively forming a partially cross-linked oxide layer that imparts superior fastness. If this content is less than 10%, this effect will not be observed, so at least 10% by volume
of oxygen gas. In addition, plasma generated at a discharge voltage of less than 400 volts results in unsatisfactory formation of an oxidized crosslinked layer on the surface, making it impossible to obtain excellent fastness. The pressure of the gas atmosphere in the low-temperature plasma generator is in the range of 0.01 to 10 Torr, and under such gas pressure, the frequency between the counter discharge electrodes is 10 KHz to
Stable glow discharge can be achieved by applying power of 10W to 100KW at a high frequency of 100MHz. Note that as the discharge frequency band, in addition to the above-mentioned high frequency, low frequency, microwave, direct current, etc. can be used. There is no particular limit to the shape of the electrodes, and the input side electrode and the ground side electrode may have the same shape or different shapes, and they can be in various shapes such as a flat plate, a ring shape, a rod shape, a cylinder shape, etc.
Furthermore, it may be of a type in which the inner wall of the safe of the device is grounded as one electrode. In this case, the distance between the electrodes is 1 to 30 cm, preferably 2 to 10 cm. If it is less than 1 cm, the fibers will be deformed or deteriorated due to the heat generated at the anode, and if it is more than 30 cm, the plasma intensity acting on the fiber surface will be weakened, making it impossible to obtain the excellent fastness that is the objective of the present invention. In addition, metals such as copper, iron, stainless steel, and aluminum are used for the electrode materials, but for the input side electrodes, in order to maintain stable discharge, durable materials such as enamel coat, glass coat, and ceramic coat are used for the input side electrode. It is preferable to apply an insulating coating with voltage.
In addition, it is desirable that the withstand voltage is 1000 volts/mm or more when direct current is applied. Next, specific examples will be given, but the present invention is not limited thereto. In the examples listed below, the low-temperature plasma generator shown in the drawings was used. A processing tank 1 in the figure is made of stainless steel, and is designed to be able to reduce the pressure to 0.01 torr or less using a vacuum pump 2. A gas introduction pipe 3 is attached to the processing tank 1, and various processing gases are divided as necessary and introduced into the tank. A rotary stainless steel cylindrical cathode 4 is installed in the processing tank 1, and the rotation speed of this cylindrical cathode can be continuously adjusted by a drive device 5.
This cylindrical cathode 4 is electrically grounded to the earth through the processing tank 1. Further, this rotary cylindrical cathode 4 has a structure in which the temperature can be adjusted by passing hot or cold water inside. Furthermore, a rod-shaped electrode 6 is provided in the processing tank 1 and is electrically insulated from the tank.
It maintains an equal distance of 20 cm from the cylindrical cathode 4. In addition, a Pirani vacuum gauge 7 for measuring the pressure inside the processing tank 1 and a high frequency power source 8 for applying high frequency power between the electrodes are provided. Example 1 100% polyester textured yarn fabric (Dianix
Blue BG-FS 4.0% (OWF) dyed fabric) was finished using the following finishing agent and processing conditions. [Finishing agent] Daytron V-500: Quaternary cationic acrylic polymer (manufactured by NICCA Chemical Industries), treatment concentration 5% aqueous solution Nicepol TF-501: Grafted cellulose (manufactured by NICCA CHEMICAL INDUSTRY), treatment concentration 10% Aqueous solution Nicepol PR-333: Water-soluble polyester (manufactured by NICCA CHEMICAL INDUSTRIES), treatment concentration 10% aqueous solution Evafanol N: Water-soluble urethane resin (manufactured by NICCA CHEMICAL INDUSTRIES), treatment concentration 5% aqueous solution Evafanol CS (catalyst, organic Sn Compound,
(manufactured by NICCA CHEMICAL INDUSTRIAL CO., LTD.) 1% aqueous solution combined treatment (finishing processing conditions) Patting, 1 dip - 1 nip, pick up 68% by weight, dry 110℃ x 3 minutes, cure 180
°C x 30 seconds Test pieces cut into 30cm x 30cm pieces treated with any of the above finishing agents and those not treated with any finishing agent were placed in the cylinder of the low-temperature plasma processing equipment described above. It was pasted on the cathode, and the inside of the treatment tank was reduced in pressure. After the internal pressure reached 0.03 Torr, the internal pressure was adjusted and maintained at 0.18 Torr while oxygen gas was introduced at a rate of 2/min and circulated. Next, a power of 110 KHz and 3 KW was applied between the electrodes, and low-temperature plasma treatment was performed for 300 seconds at a discharge voltage of 500 volts. The same low-temperature plasma treatment as above was performed on the opposite side of this test cloth. These were evaluated for fastness to rubbing and fastness to washing, and the results were as shown in Table 1. B Evaluation of fastness to friction JIS L 0849 Gakushin type friction tester, load 200g
100 times back and forth [dry method, wet method] B Evaluation of washing fastness JIS L 0844 (A-2 method) Attached white cloth, cotton, nylon [Table]

[Brief explanation of drawings]

The drawing is a schematic configuration diagram showing an example of an internal electrode type low temperature plasma generation device. 1... Stainless steel processing tank, 2... Vacuum pump, 3
...Gas introduction pipe, 4...Cylindrical cathode, 5...Drive device, 6
...Rod-shaped electrode, 7...Pirani vacuum gauge, 8...High frequency power supply.

Claims (1)

[Claims] 1. A dyed synthetic fiber product treated with a finishing agent is made of an inorganic gas containing 10% or more oxygen at a gas pressure of 0.01 to 10 torr, a discharge voltage of 400 volts or more, and a distance between electrodes. A method for improving the fastness of dyed synthetic fiber products, which comprises processing while passing through an internal electrode-type low-temperature plasma region of 1 to 30 cm. 2. The dyed synthetic fiber according to claim 1, wherein the dyed synthetic fiber product is made of polyester fiber, nylon fiber, acrylic fiber, polypropylene fiber, acetate fiber, or a blended fiber containing at least 50% by weight of these fibers. How to improve product robustness.