JPS636671B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing a woven or knitted fabric having special fluff.

Conventionally, one method of giving fluff to the surface of woven or knitted fabrics is to use cloth raising, and other methods include using emery cloth instead of cloth. is provided.

All of these conventional raised products are obtained by pulling out the single fibers that make up the woven or knitted fabric into a loop and cutting the loops to make raised fibers. ,
It has a thickness and length based on a single fiber. Also, very recently, as an improvement on the above-mentioned napping or fuzz, it has been proposed to use ultrafine fibers of 1.0 denier or less.

However, even if such ultrafine fibers are used, there are still limitations on their fineness and length. That is, the ultrafine fibers can be raised by using a bonded composite fiber and then separating the bond, or by raising the ultrafine fiber by using a sea-island composite fiber and then dissolving and removing the sea component. However, due to the conditions of the spinneret and the spinning process, it is impossible to spin infinitely fine composite fibers with stepless changes in fineness. However, there is a limit to the thickness, and the napped or fluff obtained from fibers having such a limit to the thickness also has a limit to the length.

The purpose of the present invention is to propose a method for producing a woven or knitted fabric in which extremely short fluffs, including fluffs so long that they are almost undetectable to the naked eye, are arranged in a pattern, instead of the conventional long fluffs. It is in.

That is, in the present invention, a woven or knitted fabric made of a polyester fiber blended with an incompatible additive is subjected to an uneven processing treatment, and then the surface of the convex portion of the woven or knitted fabric is subjected to a buffing treatment, and before the buffing treatment, The present invention also provides a method for producing a woven or knitted fabric having special fuzz, characterized in that the fibers on the surface of the convex portion are microfibrillated by treatment with an alkaline solution.

The present invention will be explained in detail below.

The woven or knitted fabric obtained by the method of the present invention is made of polyester fibers, and the polyester fibers are blended with additives that are incompatible with polyester. Incompatible additives may be not only organic compounds but also inorganic substances, but in order to form microfibrils,
Metal salts of organic sulfonic acids represented by the general formula R.SO ₃ M are preferably used.

However, in the above general formula, R has 3 to 30 carbon atoms.
an alkyl group or an aryl group having 7 to 40 carbon atoms,
or an alkylaryl group, M represents an alkali metal or an alkaline earth metal. Moreover, when R is an alkyl group or an alkylaryl group,
It may have a linear or branched side chain. M is an alkali metal such as Na, K, Li, etc.
Examples include alkaline earth metals such as Mg and Ca,
Among these, Na and K are preferred. Note that when using the organic sulfonic acid metal salt, it is not necessary to use a single compound, and a mixture of organic sulfonic acid metal salts having various alkyl groups or alkylaryl groups may be used. Specifically, such organic sulfonic acid metal salts include sodium stearyl sulfonate, sodium octylsulfonate, sodium dodecyl sulfonate, a mixture of sodium alkyl sulfonates having an average carbon number of 14, and dodecylbenzenesulfonic acid. Examples include soda, sodium octadecylbenzenesulfonate, and sodium nonyldiphenyl ether sulfonate.

In the method of the present invention, a woven or knitted fabric made of polyester fibers containing such additives is subjected to an uneven treatment.

For this uneven processing, means used for embossing, such as a pair of gravure rollers having an uneven pattern or uneven rollers in which the uneven surfaces are engaged, are effectively used.

The textured woven or knitted fabric is subjected to a buffing process. This buffing process is
For example, this is done using #240 grit sandpaper. In addition, it is necessary to treat with an alkaline solution before or after this buffing, and the treatment with this alkaline solution can be carried out in a range of 5 to 35% in terms of the weight loss rate of the polyester fiber. Preferable for promoting fibrillation.

In addition, the alkali hydrolysis treatment described above can be performed only on the fibers on the surface of the convex portion of the woven or knitted material by coating the surface of the convex portion of the woven or knitted material with an alkali paste. It is also possible to subject only certain fibers to conditions where microfibrillation is likely to occur.

As described above, the woven or knitted fabric obtained by the method of the present invention has special fluff on the surface of the convex portions, and by arranging the convex portions in a pattern, the special fluff is arranged in a pattern. It is something.

Further, the above-mentioned special fluff is obtained by microfibrillating the above-mentioned polyester fibers, and the apparent diameter of the microfibrillated fibrils is 0.01 to 5μ.
, and has various thicknesses within the range. In addition, the special fluff is
The length of the convex part is 1.0 mm or less and the surface of the convex portion covered with fluff of such thickness and length is extremely plain and smooth even though it has fluff, and is covered with fluff that is difficult to judge with the naked eye. It is being understood.

Incidentally, the above-mentioned apparent diameter can be measured as follows.

Apparent Diameter Take an electron micrograph of microfibrillated fluff along with a standard scale, measure the diameter of the photographed fluff with a reading microscope, and calculate the apparent diameter of the fluff from the magnification of the electron microscope and the standard scale. Depends on the method.

In addition, the woven or knitted fabric having special fuzz obtained by the method of the present invention has the fuzz only on the surface of the convex portions arranged in a pattern, and the fuzz itself is of such a degree that it cannot be detected with the naked eye. Because of this, the special fluff causes a difference in light reflection on the surface of the woven or knitted fabric between the fluffed part and the non-fuzzed part, making it possible to obtain a very unique surface effect.

Examples will be explained below.

Example 197 parts of dimethyl terephthalate, 124 parts of ethylene glycol, and 0.118 parts of calcium acetate were placed in a polycondensation flask equipped with a rectifying column, and a transesterification reaction was carried out according to a conventional method. After distilling off the theoretical amount of methanol, the reaction product was The material was transferred to a polycondensation flask with a rectification column, and 0.112% of trimethyl phosphate was added as a stabilizer.
1 part, 0.079 part of antimony oxide as a polycondensation catalyst was added, and the reaction was carried out at a temperature of 280°C and normal pressure for 30 minutes, and then
After reacting for 15 minutes under a reduced pressure of 30 mmHg, the pressure was returned to normal, and after adding 2 parts of a mixture of sodium alkyl sulfonates having 8 to 20 carbon atoms and an average carbon number of 14 as an additive, the system was The pressure was gradually reduced, and the mixture was reacted for 80 minutes with stirring.

The final internal temperature was 280°C, the final internal pressure was 0.32 mmHg, and the obtained polymer had an intrinsic viscosity of 0.65.

After the reaction, the polymer is chipped according to a conventional method, dried, and the dried chips are melt-spun according to a conventional method, and the resulting undrawn yarn is stretched 3.0 times,
It was rolled up at a drawing speed of 800 m/min. Using the polyester filament yarn (50 denier/36 filaments) containing additives obtained in this way, S300T/M for the warp, S, 3000T/M for the weft,
Z, a twist of 3000T/M was applied to weave a plain weave (paris).

The fabric is grained → dried → pre-set → uneven treatment → buffing → alkaline solution treatment →
It went through each step of dyeing → final setting. The unevenness processing is performed using an embossing roller at a temperature of 150°C, and buffing is performed only on the surface of the protrusions.

The resulting fabric had special fuzz only on the surface of the convex portions, and when this fuzz was observed under an electron microscope, it was found that the fuzz was obtained by fibrillation of the fibers. Further, the hue was different between the part with fluff and the part without fluff, and the part with fluff was apparently lighter dyed and had a pattern of shading than the part without fluff.

Claims (1)

[Claims] 1 A woven or knitted fabric made of polyester fibers mixed with incompatible additives is subjected to an uneven treatment,
Thereafter, the surface of the convex portion of the woven or knitted material is subjected to a buffing treatment, and the fibers on the surface of the convex portion are microfibrillated by being treated with an alkaline solution before or after the buffing treatment, and the apparent diameter is
It has various thicknesses steplessly within the range of 0.01 to 5μ,
A method for producing a woven or knitted article having special fluff, characterized in that the special fluff has a length of 1.0 mm or less, and the surface of the convex portion is mainly covered with the special fluff.