JPS6112921A - Method of water repellent processing of synthetic yarn - Google Patents

Abstract

PURPOSE:To obtain water-repellent and oil-repellent synthetic yarn having improved durability in good operating efficiency, by spraying yarn obtained by melt spinning from a nozzle with mist of processing agent containing a water repellent and an oil repellent that are charged oppositely to the yarn and have specific particle diameters, so that the processing agent is uniformly attached to the yarn. CONSTITUTION:For example, the unsolidified yarn A spun from the nozzle 1 in a molten state is charged at a negative voltage by the electrode 2 for impressing yarn set under the nozzle 1, cooled and solidified by the quenching chamber 3. On the other hand, a processing agent solution containing a water repellent and/ or an oil repellent is made into mist having <=10mu particle diameters by the spray 5, which is charged at a positive voltage by the electrode 6 for impressing mist, and attached to the unsolidified yarn A. The undrawn yarn B coated with the mist of the processing agent is introduced into the heating column 7, heat- treated and drawn simultaneously, and the drawn yarn C is pulled. The processing agent has 1-20wt% concentration, and its pickup to the yarn is preferably 0.03-1wt%.

Description

[Detailed description of the invention] (Industrial application field) This invention relates to a method for processing synthetic fibers with hot water.

(Prior art) Conventionally, synthetic fibers have been treated with a water-based solution mainly made of a silicon-containing polymer or a fluorine-containing polymer, especially a polymer containing a perfluoro group, to give them water-based, oil-based, and stain-repellent properties. The processing method for imparting it is well known and has been applied to the processing of various textile products.

The above-mentioned processing methods include (a) a post-processing pad dry cure method in which the fabric is immersed in an aqueous solution prepared by diluting an aqueous dispersion of a water solution or an oil solution to a predetermined concentration, squeezed, dried, and then heat-treated; (b) ) The fiber product is immersed in an aqueous dispersion of a water solution or oil solution, and then heated to increase the temperature to adsorb the solution or oil solution onto the fibers, and then dried.

(c) A spin finishing method in which a processing agent liquid containing a hot water agent or a hot water hot oil agent is applied to the undrawn yarn after melt spinning, and then subjected to a drawing heat treatment. , and (d) a surface polymerization method using a fluorine-containing polymer and a blend melt-spinning method of a fluorine-containing polymer are known.

(Problems to be Solved) None of the above-mentioned known processing methods satisfies durability and economic efficiency. For example, in the above-mentioned (a) post-processing pad dry cure method, adhesion spots are likely to occur in the fabric due to thermal migration of the water solution or oil solution during the drying process, and unnecessary processing is required to obtain sufficient performance. This requires the use of a chemical agent, which poses problems in terms of processing efficiency and economy. (b) Although the adsorption heat treatment method improves the uniform adhesion of the processing agent to some extent compared to the post-processing pad dry cure method (a) above, it is difficult to completely eliminate adhesion spots and there are problems with the processing effect. be. (C) The spin finish method is
A processing agent can be applied to each fiber, and the durability of the processing effect is improved compared to the above methods (a) and (b), but it tends to cause adhesion spots, and the spinning/drawing used in combination Since there are major restrictions on the type of oil, spinning 1. There is a problem with the operability of stretching. In addition, (d) the surface polymerization processing method and the blend melt spinning processing method have problems in terms of economic efficiency, changes in the physical properties of the yarn, and the like.

(Means for Solving the Problem) This invention provides a method in which a processing agent liquid containing a molten water agent and/or a molten oil agent is applied to the yarn melt-spun from a nozzle in the form of a mist with a particle size of 10 microns or less. Synthesis characterized in that a processing agent mist is sprayed under a state in which the processing agent mist and the yarn are oppositely charged, and the yarn is taken off while particles of a liquid or oil agent are attached to the yarn. This is a fiber processing method.

The yarn in this invention is formed by melting a thermoplastic resin and extruding it through a nozzle hole, and the thermoplastic resin may be polyester, nylon, polyacrylonitrile, polypropylene, or modified polymers thereof. , there are no particular restrictions as long as it can be melt-spun.

Hot water preparations include dimethylpolysiloxane, methylhydrogenpolysiloxane, dimethylsiloxane/methylhydrogensiloxane copolymer, methylphenylpolysiloxane, epoxy-modified diorganopolysiloxane, amine-modified organopolysiloxane, and polyoxyalkylene. Examples include silicone-based water repellents such as modified organopolysiloxane-based water repellents, and wax-based water repellents, but are not limited to the above.

The fluorine-containing organic compound containing a perfluoroalkyl group and a modified product thereof are particularly preferable for the honey-water-oil agent, and may be either a monomer or a polymer. The above-mentioned fluorinated organic compounds are described in detail in, for example, Japanese Patent Publication No. 58-51544.

The above-mentioned honey solution and honey water and oil solution may be used together.

The processing agent liquid containing the above-mentioned heart water agent or heart water oil agent and subjected to mist formation includes a fiber swelling agent, a fiber swelling agent, etc., in order to promote good permeability and adhesion to the surface layer of the yarn.
A penetrating agent and a spinning/drawing oil agent that has little adverse effect on the aqueous and oily properties of the core may be added. However, when processing agent mist is used together with gas as a cooling medium for yarn spun in a molten state, the components of the additive described above must have good heat resistance, and if many components lack heat resistance, This is not preferable because the strength of the yarn may decrease and it may lack practicality. Furthermore, other processing agents such as fungicides, antibacterial agents, colorants, fragrances, crosslinking agents, etc. can be used in combination with the processing agent liquid, if desired, within the scope of not impairing the gist of the invention and the silk-spinning properties. .

The above-mentioned oil agent is used as a processing agent liquid dispersed in water, and its concentration is 0.5 to 30% by weight, preferably 1 to 20% by weight.

The particle size of the processing agent mist containing the water solution or the oil solution is 10 microns or less, preferably 1 micron or less. If the particle size exceeds 10 microns, the mist is sprayed onto the molten yarn. In some cases, the surface of the yarn becomes rough, and scum tends to adhere to various rollers and guides during the spinning process, which is undesirable. It varies depending on the denier etc., but it is 0.01 to 2 for the fiber.
% by weight, preferably 0.03-1% by weight.

The particle size of the processing agent mist depends on the aperture of the spray nozzle, the spray speed,
It can be adjusted by adjusting the spray angle, etc.

The particle size was determined by placing a petri dish with a silicone liquid film formed on the spouting part of the processing agent mist, catching the processing agent mist with the liquid film for 0.2 seconds, and immediately using a Nippon Kogaku profile projector. A mist particle image was photographed, 500 particles were randomly selected from the obtained photograph (magnification: 100 times), and their particle diameters were measured, and the average particle diameter of the 10 largest particles was determined.

As a spray for spraying the above-mentioned processing agent mist, a known spray such as an atomizer or Nebulanoris can be used. The processing agent mist is supplied using a one-way quench chamber in which the cooling medium is sprayed onto the yarn from one side, or a circular one-way quench chamber in which the cooling medium is sprayed inward from the periphery. A method of spraying along with the flow of the cooling medium is preferred.

In this invention, it is necessary that the yarn and the processing agent mist are charged oppositely to each other, and by the yarn and the processing agent mist being charged oppositely, it is possible to spray the processing agent mist onto the yarn. Sometimes, the processing agent mist adheres to the yarn efficiently and uniformly, and especially when the temperature of the yarn is high, the processing agent mist spreads and diffuses from the surface of the yarn into the inside. The larger the charging voltage difference between the yarn and the processing agent mist, the more uniformly the processing agent mist will adhere to the yarn, so it is preferable that the charging voltage difference is large.

The charging voltage difference is usually 0.1 to 100KV, preferably 0.2
~30KV. If the difference in charging voltage is too large, it may cause dielectric breakdown. When the charging of the yarn and the processing agent mist is not opposite to each other, or when one of them is not charged, the processing agent mist is difficult to adhere to the yarn. - To charge the yarn, apply high-voltage static electricity to the nozzle or directly below the nozzle. In order to charge the processing agent mist, high-voltage static electricity is applied close to the spray. To apply a high voltage to the processing agent mist, place a high voltage application electrode at the point where the processing agent mist passes through the quench chamber.
The mist particles are charged with ions generated from the application electrode. The application electrode is preferably installed at a position as close to the yarn as possible and at a distance that ensures safety. A general commercial product can be used as the static electricity applying device.

As explained above, it is preferable to attach the processing agent mist to the yarn while the yarn spun from the nozzle is being cooled by the cooling medium, but only the processing agent mist is attached to the yarn after the yarn is cooled and solidified. A spraying zone may be provided to apply the electrostatic charge to the yarn, and in this case, the electrostatic charging voltage is usually 0.2
It is preferable to make it higher than KV.

The undrawn yarn to which the above-mentioned processing agent mist is attached is wound up or shaken off, and then subjected to heat treatment and stretching, or heat treatment and stretching. The heat treatment causes the processing agent adhering to the surface of the yarn to be diffused into the interior of the yarn, improving durability. Particularly in the unstretched stage, molecules are not oriented, so the effect of diffusion of processing agent particles into the interior of the yarn is large. In addition, a method may be adopted in which the undrawn yarn is passed through a heating zone and heat treated before being taken off, and then taken out and stretched, or a method in which the undrawn yarn is taken out from a heat treatment machine and continuously stretched. The method is efficient. Particularly in high-speed spinning, since a draw frameless spindle system can be adopted, productivity is significantly improved, and even processing agents with a large molecular weight can be diffused inside the yarn, further improving durability in particular.

An example for carrying out the method of the present invention will be explained below with reference to the drawings.

The unsolidified yarn A spun from the nozzle 1 in a molten state is charged to a negative voltage by the yarn applying electrode 2 provided below the nozzle 1, and introduced from the cooling air flow 4 of the quench chamber 3. It is cooled and solidified by the cooling air flow. On the other hand, the processing agent liquid is turned into a mist by the spray 5 disposed in the quench chamber 3, passes through the mist application electrode 6 disposed close to the front of the spray 5, and is charged to a positive voltage.
The applied processing agent mist adheres to the unsolidified yarn A. The undrawn yarn B to which the processing agent mist has been adhered is introduced into the heating tube 7 and drawn simultaneously with the heat treatment, and the drawn yarn C is taken off by the take-off roller 8.

It is wound on Pobin 9. The above drawing speed is preferably 3000 m/min or higher, and if the residual elongation is too large due to the characteristics of the polymer, it may be drawn continuously following the spinning process, or it may be drawn again after being wound up. is preferable. The stretching ratio at this time is up to about 2 times the diameter. The processed yarn is crimped and then cut into a desired length and heat treated to be used as short fibers, or it is wound around a bobbin and further processed into filament yarn. used as.

(Example) Example Polyethylene terephthalate with an intrinsic viscosity of 0.65 was
A negative voltage of 50 KV was applied directly below the nozzle to the molten yarn spun at 5°C from a nozzle with a diameter of 0.23 mm and 36 holes at a discharge rate of 0.6 g/min per single hole. 20℃,
While cooling with cooling air at a wind speed of 0.35 m/sec, a processing agent solution containing a water-based liquid or a water-based oil shown in Table 1 below is ejected with a nebulizer at a pressure of 2.5 kg/d to form particles. This mist was made into a mist with a diameter of 1.2 microns, and this mist was supplied into the quench chamber, and a positive voltage of 50 KV was applied in the chamber, and with the processing agent mist attached to the yarn, it was placed 2 m below the nozzle. Length in position 100C
I1. The fibers were passed through a cylindrical heater with an ambient temperature of 310° C. and taken off at a speed of 4000 m/min to obtain a synthetic fiber having a thickness of 10 denier and having a water-based property and an oil-based property. The resulting synthetic fibers were crimped under normal conditions, cut into lengths of 68 cm, and heat treated to obtain polyester stable cotton. These stable cottons having water-based properties and oil-based properties were dyed with disperse dyes at 130°C, and then raised kneepan carpets were prepared by a conventional method. Table 2 shows the results of the spinning operability of the above-mentioned stable cotton, and the evaluation of the initial water resistance, oil resistance, and durability of the napped kneepan carpet.

(Blank below) Table 1 The water solution, the oil solution, and the spinning/drawing oil agent in Table 1 above are as follows.

Honey solution A: Product name FZ350 (manufactured by Nippon Unicar Co., Ltd.) (
CHs)sS': J-0-C(CL)=SIO3xC
G&5103. Sl(CL)-Hatsu liquid medicine B: Product name L
E 9300 (manufactured by Nippon Unicar Co., Ltd.) (CHs), si
O+(CHj)rSlo )i:% C 10 the 1 (C
Hs) spp" ・(Epoxy-modified silicone oil) Melt water solution C: Melt water solution = Product name Scotchgard FC395 (
Manufactured by Jujutsu 3M Co., Ltd.) Honey water oil agent E゛: Product name Asahi Guard LS317 (
(manufactured by Meisei Chemical Industry Co., Ltd.) Honey water oil agent F: Trade name TNT309 (manufactured by Matsumoto Yushi Seiyaku Co., Ltd.) Spinning and drawing oil agent: Polyoxyethylene lauryl ether (EO20 mol%) &9 in Table 1 does not apply any processing agent liquid at all This is a comparative example.

(Blank below) Table 2 In Table 2, yarn reeling properties are evaluated by yarn runnability and guide dirt, yarn quality is evaluated by denier fluctuation, and core property is evaluated by a mixture of isopropyl alcohol and water at a certain ratio ( Table 3) was prepared, small droplets of this liquid were placed on the carpet surface, and the flow of the water droplets was evaluated.

Heart oiliness was evaluated by AATCC method 118-1975. The carpet abrasion test was carried out using a rubber roll with a load of 1 kg and 500 kg according to the dynamic load measurement method of JIS-L1021.
Tested after 0 rubs.

As can be seen in Table 2, when a honey water solution is applied, the oiliness of the heart does not improve, but when a honey water and oil agent is attached, the waterability and oiliness of the heart are improved. In the case of Nα7.8 in which no spinning/drawing oil was used in combination, the spinning properties were slightly lowered, but there was no change in the aqueous and oily properties of the core. In any case, the wear machine performance has not deteriorated much compared to the initial performance.

Comparative Example 1 Polyethylene terephthalate having an intrinsic viscosity of 0.65 was melt-spun, and the undrawn yarn obtained by cooling at room temperature was added with the molten oil agent E (trade name Asahi Guard LS 317) of Example 2.
．． A processing agent liquid consisting of 5% by weight, 0.05% by weight of a spinning/drawing oil, and water was applied using a roller oiling method with an oil emulsion application amount of 20% by weight, and then stretched under normal conditions to give crimps. Staple cotton of 10 denier and 68 length was obtained by the spin finish method, and raised knee bun carpet was obtained in the same manner as in the example.

Comparative Example 2 A raised knee bun carpet was produced in the same manner as in Comparative Example 1, except that the heat water and oil agent E in the finishing agent in Comparative Example 1 was not mixed. Oil agent 0.5% heavy weight, or oil agent E
A processing agent solution containing 5% by weight of O0 was applied in an application amount of 100% by weight, dried and heat treated to obtain a carpet by the post-processing pad dry cure method.

Table 4 shows the evaluation of Comparative Example 1.2 according to Table 2 above.

Table 4 As shown in Table 4, in Comparative Example 1, there was no significant difference in the deterioration of the performance after abrasion compared to the above-mentioned Examples &5, but the spinning property was decreased. In Comparative Example 2, the performance after wear deteriorates significantly.

(Effects of the Invention) According to the processing method of the present invention, a processing agent mist containing an adhesive or an oil agent is sprayed onto the yarn in a molten state immediately after melt-spinning, and in an oppositely charged state. Because of this, it is possible to effectively and uniformly adhere and infiltrate the surface of each fiber with the water-based and/or oil-based synthetic fibers, which are more durable than conventional methods. can get. In addition, since it is possible to apply the processing agent mist and the spinning/drawing oil mist separately,
It is possible to eliminate operational inconveniences due to instability of the oil emulsion that tends to occur between the processing agent liquid and the spinning/drawing oil, and the range of use of the spinning/drawing oil is expanded. In particular, if a draw frameless spin-draw type is adopted, scum from the chiseled water agent and/or chiseled oil agent, as well as scum from the combined use of the spinning and drawing oil agent, will be prevented from adhering to the rollers, and operability will be significantly improved. .

[Brief explanation of drawings]

The drawings are explanatory diagrams for implementing the method of the present invention. 1: Nozzle, 2: Yarn application electrode, 5 Nispray, 6:
Electrode for applying mist. Patent applicant Toyobo Co., Ltd. Agent Patent attorney Takeo Sakano Ryoji Yoshida

Claims (1)

[Scope of Claims] [1] A processing agent mist in which a processing agent liquid containing a liquid solution and/or an oil agent is made into a mist having a particle size of 10 microns or less on the yarn melt-spun from a nozzle. is sprayed under a state where the processing agent mist and the yarn are oppositely charged,
1. A method for processing synthetic fibers with water, which comprises taking off the threads while adhering particles of a water solution and/or oil to the threads. [2] The method for processing synthetic fibers in hot water according to claim 1, wherein static electricity is applied so that the processing agent mist and the yarn are charged oppositely. [3] The method for processing synthetic fibers in hot water according to claim 1 or 2, wherein the yarn to which the processing agent mist is attached is subjected to heat treatment. [4] The method for processing synthetic fibers in hot water according to any one of claims 1 to 3, wherein the yarn to which the processing agent mist is attached is stretched or drawn.