JPS6262189B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for processing fibers, and more particularly to a method for obtaining textile products with excellent water repellency, oil repellency and stain resistance.

Conventionally, textile products have been treated with fluorine compounds to impart water repellency, oil repellency, and stain resistance.

Generally, when manufacturing various textile products by knitting, weaving, or forming webs in non-woven fabrics using fibers, fluorine is often used as a lubricant such as spindle oil, wood wax, solid paraffin, carnauba wax, silicone oil, etc. Treated with a smoothing agent. After producing textile products, these smoothing agents are removed using caustic soda, surfactants, and the like. However, due to the physical properties of the smoothing agent, it is unavoidable that some of these remain.

Therefore, even if the obtained textile product is subjected to water-repellent, oil-repellent and antifouling treatment in this state, the treatment effect will be significantly reduced due to the influence of the residual smoothing agent.

As described above, conventional fiber processing methods have drawbacks such as complicated processes due to the use of oil-retaining smoothing agents and insufficient fiber processing performance.

The object of the present invention is to provide a fiber processing method that eliminates these drawbacks.

The present invention is a fiber processing method characterized by preparing a textile product using fibers to which a sublimable substance has been attached, and then treating the textile product with a fluorine compound.

The present invention applies natural fibers such as cotton, hemp, wool, and silk, synthetic fibers such as polyester, acrylic, nylon, polyvinyl alcohol, polyvinyl chloride, and polypropylene, semi-synthetic fibers such as rayon and acetate, glass fibers, rock wool, asbestos, etc. The present invention can be applied to any textile product obtained from inorganic fibers or various fibers made by blending these fibers.

In the present invention, when producing textile products using the above-mentioned fibers, a sublimable substance is used in place of the known oil-supplying smoothing agent, and the material is attached to the fibers by sublimation or by contact. Therefore, unlike conventional smoothing agents, it can adhere uniformly to fibers and provide excellent smoothness. The sublimable substance used here is not particularly limited as long as it can adhere to fibers or threads through vaporization or liquid contact. For example, alicyclic compounds such as endo-trimethylenenorbornane, trimethylnorbornane, cyclododecane, adamantane, and silane,
Aromatic compounds such as naphthalene, diphenyl, benzoic acid, para-dichlorobenzene, trioxymethylene, dimethyl fumarate, coumarin, 1,6-
Examples include polar compounds such as hexanediol. Among these sublimable substances, carbon number 7
The alicyclic compounds of 1 to 12 are preferably used in terms of imparting smoothness to the fibers. This sublimable substance can be used alone or in combination with other sublimable substances.

Sublimable substances may be vaporized by placing them in a suitable pot, steamer, etc. under heating or reduced pressure conditions, or they may be made into emulsions, suspensions, etc. according to conventional methods.
After preparing it in any form such as a solvent solution or an aerosol, it can be brought into contact with and adhered to fibers by coating, dipping, or other methods. The emulsion used in this case generally includes water and various surfactants. In addition, examples of the solvent used as a solvent solution include acetone, methyl ethyl ketone, ethyl acetate, diethyl ether, methylene chloride, methyl chloroform, trichloroethylene,
Those that do not adversely affect the fibers to be treated are selected from among tetrachlorethylene, trichlorotrifluoroethane, tetrachlorodifluoroethane, and the like.

0.005 for the amount of sublimable substances attached to fibers
The amount may be up to 5% by weight, preferably 0.01 to 3% by weight, and is more effective than conventional wax-type smoothing agents with a small amount of adhesion. The amount of the sublimable substance deposited can be adjusted by controlling the contact time, temperature, etc.

When knitting, weaving, etc., fibers to which a sublimable substance is evenly adhered have less frictional resistance between the fibers or between the fibers and knitting needles, machine parts, etc., making it possible to efficiently obtain the desired textile product. can.
Textile products here mean cotton, yarn, knitted fabrics, woven fabrics, rugs, nonwoven fabrics, felts, etc., and their shapes are arbitrary.

Although a small amount of a sublimable substance is attached to the obtained textile product, this will volatilize over time if left to stand, so the conventional removal process can be omitted. Note that even if the sublimable substance is attached, it can be vaporized and removed by performing the next step.

Textile products can be treated with fluorine compounds by conventional methods, such as dipping, padding, spraying, coating, etc., followed by drying and heat treatment.

Examples of fluorine compounds include tetrafluoroethylene, polymers of perfluoroalkyl group-containing acrylates or methacrylates, copolymers with alkyl acrylates, maleic anhydride, styrene, butadiene, etc., fluorine-containing urethane compounds, etc. There are fluororesins. The amount of the fluorine compound used is not particularly limited, but it is generally used in a proportion of 0.1 to 50% by weight. Further, processing conditions are appropriately determined depending on the type of fiber to be processed, processing equipment, required performance, etc.

As described above, according to the method of the present invention, by skillfully utilizing the properties of the sublimable substance used as a leveling agent, it can be applied to fibers uniformly in a solution state, water dispersion state, or even gas phase state, and even with a small amount of use. In addition, the step of removing the smoothing agent can be omitted. In addition, since no such smoothing agent remains, treatment with a fluorine compound can be carried out effectively, and the textile products have extremely good water repellency, oil and stain resistance.

Next, the present invention will be explained in detail with reference to examples.
Note that the component ratios shown in the Examples are expressed in weight ratios unless otherwise specified. In addition, the water repellency and oil repellency results are based on the following test method.

(1) For water-repellent knitted fabrics: Based on JIS L1092-1977 spray method.

For non-woven fabrics and carpets: Drop one drop of a 30% isopropyl alcohol solution onto the sample and measure the time it takes for the water drop to disappear to determine the degree of water repellency.

(2) Oil-resistant According to AATCC118-1972.

Gently drop one drop of the reagent shown in the table below onto the surface of the sample spread horizontally, and judge the state of penetration after 3 minutes.

Table 1 Judgment reagent 8 n-hepetane 7 n-octane 6 n-decane 5 n-dodecane 4 n-tetradecane 3 n-hexadecane 2 Nudiol (65)/n-hexadecane (35) mixture 1 Nudiol 0 1 Example 1: 1 kg of polypropylene cotton with 1% adamantane,
After immersing for 10 minutes in an aqueous dispersion at 50°C containing 0.05% polyethylene glycol mono-P-nonyl phenyl ether (added amount of ethylene oxide: 10 mol), it was taken out, dehydrated at a squeezing rate of 50%, and air-dried. Summer. This product was prepared into a nonwoven carpet.

After that, the surface of this product was coated with 250 g of an aqueous dispersion containing 5% of fluororesin emulsion (product name: Asahi Guard AG-800, manufactured by Asahi Glass Co., Ltd.).
It was sprayed at a coating amount of m ² and dried at 120° C. for 5 minutes. The water repellency and oil repellency imparted to this nonwoven carpet were as follows.

and aqueous: water droplets did not disappear even after 5 minutes had passed Oil-repellent: 6 Comparative Example 1 1 kg of polypropylene wadding containing 1% dimethylpolysiloxane type silicone oil and 0.05% oleyl alcohol (added amount of ethylene oxide: 5 mol) It was immersed in an aqueous dispersion at 50° C. for 10 minutes, dehydrated and naturally dried under the same conditions as in Example 1. This product was prepared into a nonwoven carpet.

Thereafter, a fluorine compound treatment was performed in the same manner as in Example 1. The water repellency and oil repellency imparted to this nonwoven carpet were as follows.

and Water-based: Water droplets disappeared within 1 second. And Oil-based: 0. In addition, each of the nonwoven carpets of Example 1 and Comparative Example 1 was pasted in a hallway, and a stepping test was conducted with shoes on for one month, and the effect on staining was observed with the naked eye. As a result, the stains in Comparative Example 1 were large and noticeable, whereas the stains in Example 1 were very small.

Example 2 Cone-wound nylon spun knit yarn
Put 1.4Kg into the can of the steam setter tester,
The can body was depressurized to 12 mmHg, and then the can body was heated to 150°C.
of hot water and 140 g of endo-trimethylene norbornane heated to 90°C were injected, and the can body was held at 50°C for 10 minutes to adhere the endo-trimethylene norbornane to the threads, which were cooled and then taken out. At this time, the amount of endo-trimethylenenorbornane attached to the yarn was 0.2%.

After knitting using this yarn, the surface is dipped in an aqueous dispersion containing 3% fluororesin emulsion (product name: Asahi Guard AG-710, manufactured by Asahi Glass Co., Ltd.), and the squeezing rate is 90 using a putting mangle. % and dried at 100°C. Thereafter, heat treatment was performed at 170°C for 1 minute. The water repellency and oil repellency imparted to this knitted fabric were as follows.

and Water-based: 100 and Oil-based: 7 Comparative Example 2 Cone-wound nylon spun knit yarn
1.4 kg of 5% oil-supplying smoothing agent mixed with 2 parts spindle oil and 8 parts oleic acid and 0.5 oleyl alcohol (ethylene oxide addition amount: 5 moles)
% for 10 minutes in an aqueous dispersion at 50℃, dehydrated,
Dry. At this time, the amount of the smoothing agent attached to the thread was 0.2%.

After knitting using this yarn, the resulting knitted fabric was treated with a fluorine compound in the same manner as in Example 2. The water repellency and oil repellency of this knitted fabric were as follows.

And aqueous: 50 And oiliness: 1

Claims (1)

[Scope of Claims] 1. A fiber processing method, which comprises preparing a textile product using fibers to which a sublimable substance is attached, and then treating the textile product with a fluorine compound. 2. The fiber processing method according to claim 1, wherein the sublimable substance is an alicyclic compound having 7 to 12 carbon atoms.