JP3422951B2 - Form stabilization treatment method for special yarn - Google Patents

Description

Detailed Description of the Invention

[0001]

The present invention relates are those unique texture is concerned <br/> the form stabilizing treatment how the special thread to be maintained over a long period.

[0002]

2. Description of the Related Art Conventionally, in order to give a woven fabric or knitted fabric as a final product a unique texture (bulkiness and flexibility),
Threads with a special construction are used. As such a special yarn, for example, after cellulosic fibers such as cotton or rayon and water-soluble vinylon are spun into a fabric,
Examples thereof include hollow fibers obtained by dissolving away the water-soluble vinylon and the like, and various bulky yarns represented by Taslan processing. Since these yarns are superior in bulkiness and flexibility when compared with ordinary yarns when used as a fabric, they are widely used for pile fabrics such as towels and knit products in general.

[0003]

These special yarns, like ordinary yarns, are usually loaded into a dyeing machine in the form of a package called cheese and subjected to scouring / dying processing. for example, in the case of the double spinning, in the scouring and dyeing process, since the water-soluble vinylon for hollow forms and the like are dissolved and removed, at that stage, the waist of the fiber is impaired crushed hollow portion, pains However, there is a problem that the characteristics of (3) are not sufficiently maintained until the final product. Moreover, bulky yarn of these <br/> double doubling or above, vulnerable to repeated washing, there is a problem that their characteristics after several washing is largely lost.

Therefore, it has been proposed to subject the woven or knitted fabric using the above-mentioned special yarn or the yarn after scouring / dying to form stabilization treatment. However, as already mentioned, in the scouring / dying process. The stiffness of the fiber is often impaired at the stage, and it has been difficult to sufficiently develop and maintain the unique texture unique to the special yarn by the above measures.

[0005] The present invention has been made in view of such circumstances, characteristics such as bulkiness and flexibility without impaired over a long period, good special yarns form of stabilization <br/> how The purpose is to provide.

[0006]

In order to achieve the above object, the present invention provides a yarn composed of a composite of cellulosic fibers and water-soluble synthetic fibers or a yarn composed of bulky cellulosic fibers. When performing the scouring / dyeing process in a package, prior to the scouring / dying process, saturated steam at 170 to 200 ° C. is passed from the outside of the package to the inside of the package-shaped yarn, The first gist is a method for stabilizing the morphology of a special yarn, in which the saturated steam is brought into contact with the yarn to perform a heat-moisture treatment.
You.

Among them , the present invention is particularly
Prior to the moist heat treatment, for the package-shaped yarn,
Preheat the yarn by contacting it with hot air at 100-200 ℃
The method to you and second aspect.

That is, according to the present invention, the special yarn is subjected to a special wet heat treatment in a specific temperature range prior to the scouring / dying process. The flexibility is sufficiently maintained even after the subsequent scouring and dyeing process. Therefore, the final product obtained by using the special yarn treated in this manner also has excellent morphological stability properties, and has the advantage that the properties are not lost even after repeated washing.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of the present invention will be described in detail.

Firstly, special thread targeted by the present invention, a yarn made of a cellulose-based fiber yarn formed by composing the cellulosic fiber and water-soluble synthetic fibers, or bulkiness is imparted. The above-mentioned "cellulosic fiber" is a fiber whose basic skeleton is cellulose, and in addition to plant fibers such as cotton and hemp,
Examples include recycled fibers such as rayon and cupra. It should be noted that mixed fibers obtained by mixing some of these fibers with other fibers are also included in the "cellulosic fibers".

[0011] Then, The "cellulosic fiber and water-soluble synthetic fibers and yarns formed by composing a" is combined with cellulosic fibers and fibers made of easily soluble polymers such as water-soluble vinylon, for example the easily soluble Place the polymer on the core side,
After mixing and spinning the cellulose fibers on the sheath side to form a composite yarn , the above-mentioned easily soluble polymer portion is removed with water (alkaline solution) during the scouring / dyeing process to form a hollow fiber. It is a thing. Of course, it is not always necessary to make it hollow, and by removing the easily soluble polymer portion, it is possible to form a yarn having voids by removing a part of the spinning cross section, such as X type, Y type, and radial type. Any composite form may be used.

Further, the above-mentioned "yarn made of cellulosic fibers imparted with bulkiness" includes bulkiness imparted by crimping, core yarn, knit denitted crimp yarn and the like. For this reason, a rayon filament, spandex or the like is used as a core yarn, and a Taslan-processed yarn having a cotton fiber wound around the core yarn can be given as a typical example.

The processing mode in the present invention is as follows.
Although it is appropriately set depending on the form and use of the above-mentioned special yarn, it is usually processed in the state of being packaged in a cheese (including corn) shape. That is, when the package form is used, the process can be performed using the package dyeing machine that has been conventionally used when performing the scouring / dying process, and even after the process is completed, the package dyeing machine in the state of being loaded in the package dyeing machine can be used. This is because it is possible to shift to the next step, the scouring / dying step, as it is.

Next, FIG. 1 shows an example of a processing apparatus that can be used for implementing the present invention. In the figure, reference numeral 1 is a vertical closed type processing tank similar to a conventional package dyeing machine, and a carrier 3 having a cylindrical spindle 3a with a perforation standing upright is loaded inside. Then, the special thread 2 to be processed is wound around a perforated tube (not shown) and packaged in a cheese shape on the spindle 3a so as to be stacked and held in multiple stages. (6 steps in the figure). Incidentally, the cheese pressing plate, the nut for holding the cheese tightening, etc. are conventionally known configurations,
The illustration is omitted. A coil-type heat exchanger 4 is provided below the processing tank 1.

A steam introducing pipe 5 extending from the outside of the treating tank 1 and a hot air introducing pipe 6 are connected to the lower portion of the treating tank 1. The steam introduction pipe 5 has a pressure gauge 7,
A steam valve 8, a switching valve 9, and a separator trap 10 are provided. Further, in the hot air introducing pipe 6, two blowers 11 and 12 arranged in parallel, and an erotic fin heater 1
3, a sluice valve 14 is provided.

On the other hand, a vapor take-out pipe 16 is connected to the mounting portion of the carrier 3 in the processing tank 1.
The steam that has penetrated inward from the periphery of the cheese passes through the inside of the spindle 3a and is taken out to the steam taking-out pipe 16. A vapor recovery pipe 19 is connected to the vapor extraction pipe 16 via a sluice valve 17 and a control valve 18. The vapor is sucked by a vacuum pump 20 and waste heat is recovered in a condenser 21 and condensed. The collected water is collected in the drain tank 22. Reference numeral 31 is a sluice valve.

The steam introduced by the steam introducing pipe 5 is sent to the erotic fin heater 13 of the hot air introducing pipe 6 via the connecting pipe 30 when it is used for the wet heat treatment in the morphological stabilization process. It may be used as the heat source. Therefore, the steam valve 8 of the steam introducing pipe 5 is adapted to open and close in response to an instruction from the temperature / pressure control means 23 or an instruction from the temperature control means 24. That is, the above-mentioned temperature and pressure control means 23 is preset with predetermined morphological stabilization processing conditions (temperature and pressure), and is input with time from a temperature sensor 25 provided in the middle of the steam extraction pipe 16. The opening / closing of the steam valve 8 is controlled on the basis of the temperature data to keep the steam introduced into the processing tank 1 under proper conditions. Further, a predetermined preheat treatment temperature is input and set in advance in the temperature control means 24, and the hot air introducing pipe 6 for preheating is set.
The opening and closing of the steam valve 8 is controlled on the basis of the temperature data input with time from the temperature sensor 26 provided in the middle of so as to maintain the temperature of the air (hot air) heated by the erotic fin heater 13 appropriately. It has become.

A drainage pipe 34 having a drain valve 33 is connected to the bottom of the processing tank 1 so that the processing tank 1 can be processed.
A pressure adjusting pipe 36 having a pressure gauge 35 and a safety valve (not shown) is connected to the upper part of the. Reference numeral 37 is a temperature sensor that constantly measures the temperature inside the processing tank 1.

Using the above-mentioned apparatus, the form stabilization treatment of the special yarn 2 can be performed, for example, as follows. That is, first, as shown in FIG. 1, the cheese-shaped special yarn 2 is loaded into the processing tank 1. And the sluice valves 14, 3
1 is opened, steam is sent to the connecting pipe 30, the blowers 11 and 12 and the erofin heater 13 are operated,
Hot air is introduced into the treatment tank 1 from the hot air introduction pipe 6, and the special yarn 2 is preheated with high temperature hot air.

This is because when high temperature saturated steam is introduced for shape stabilization treatment while the temperature around the special yarn 2 remains low,
Condensed drain may be generated and the special thread 2 may get wet,
This is because the morphological stabilization process is likely to be insufficient in the wet portion. Particularly, in the case in which special yarn 2 is obtained by combining the cellulosic fibers and readily soluble polymers, the readily soluble polymer (e.g., water soluble vinylon) 5
Since it dissolves in water at 0 to 60 ° C., when the special yarn 2 gets wet with condensed drain, the bulkiness of the special yarn 2 is lost,
In that state, the morphological stabilization process is performed, which is not preferable. In addition, since the easily soluble polymer that has been eluted becomes a kind of glue and adheres to the surface of the special yarn 2, when it is taken out from the treatment tank 1 and then rewound or rewound after the shape stabilization treatment, the unwinding property is It may get worse. Therefore, when the special yarn 2 contains the easily soluble polymer, it is particularly preferable that the preheating is applied prior to the wet heat treatment with saturated steam.

In the preheating, the hot air temperature is usually preferably set to 100 to 200 ° C. That is, if the temperature is less than 100 ° C., the effect of preventing the generation of condensed drain is small, and if the temperature exceeds 200 ° C., the fibers may be damaged by heat and embrittlement may occur.

Next, with the sluice valves 14 and 31 closed and the connection pipe 30 also shut off, high-temperature saturated steam (for example, 180 ° C.) is introduced into the processing tank 1 through the steam introduction pipe 5. At this time, the separator trap 10 prevents the mist of liquid water from entering the processing tank 1.

By controlling the opening / closing operation of the steam valve 8, the temperature in the processing tank 1 is maintained at a predetermined shape stabilization processing temperature. The process is completed by maintaining this state in the temperature / pressure control means 23 for a preset time (morphological stabilization process time, for example, 5 minutes).

The saturated steam introduced into the treatment tank 1 permeates from the outside to the inside of the cheese-like special yarn 2, passes through the hollow portion of the spindle 3a, and passes through the steam extraction pipe 16 to generate steam. It reaches the recovery pipe 19 and the waste heat is recovered and the condensed water is recovered.

Then, at the same time as the treatment is completed, the steam valve 8 is closed, the partition valve 31 is opened, and the inside of the treatment tank 1 is degassed, so that the inside of the treatment tank 1 is returned to room temperature and normal pressure to stabilize the form. The conversion processing ends. Then, if necessary, the special yarn 2 can be subsequently subjected to a scouring / dying process through a scouring / dying process liquid circulation path separately formed in the processing tank 1. Further, as described above, if it is necessary to take out the cheese-shaped special yarn 2 once and rewind or rewind it, open the lid of the processing tank 1 and take out the special yarn 2 together with the carrier 3. Move to the place where you want to perform the desired processing.

According to this method, the high temperature saturated steam introduced into the processing tank 1 is sucked by the vacuum pump 20 provided at the end of the steam recovery pipe 19 to force the cheese from the outside to the inside. Since it passes through, the high temperature saturated steam can sufficiently spread to the inside of the cheese, and a uniform morphological stabilization treatment can be performed.

Therefore, the special yarn 2 treated by the above method is uniformly subjected to the morphological stabilization treatment in every part, and the peculiar bulkiness and flexibility of the special yarn 2 are scoured thereafter. -It is not damaged by dyeing and the like, and the texture is maintained even in the final products such as woven and knitted fabrics and knit products. Then, even if the final product is repeatedly washed, the texture can be maintained for a long time.

[0028] In the above method, the high-temperature saturated steam has been set so as to pass from the outside of the cheese toward the inside, if if were passing through the high-temperature saturated steam from the inside of the cheese to the outside, a vapor without separation removal of the drain mist generated in the inlet conduit 5 as much as possible completely, wetting occurs cheese inner layer portion, there is a fear that uniform heat treatment can be inhibited.

The temperature of the saturated steam used for the morphological stabilization treatment varies depending on the material and structure of the special yarn 2, the intended degree of treatment, etc., but basically it is not within the range of 170 to 200 ° C. I won't. That is, if the temperature is lower than 170 ° C., the effect of stabilizing the morphology becomes insufficient, and if the temperature exceeds 200 ° C., the fibers are damaged by heat and brittleness is likely to occur. And the processing time is also set appropriately,
Usually, it is set to about 2 to 10 minutes.

Further, in the above method, the steam recovery pipe 1
By providing a vacuum pump 20 to 9 side and the steaming tank 1 to force the exhaust from the (hollow portion of the spindle 3a) steam so that forcibly penetrate from the outside of the cheese on the inside, steam If the introduction amount of is adjusted to be slightly higher than the vapor extraction amount, the pressure on the vapor introduction side becomes high and the pressure difference from the vapor extraction side inevitably causes a moving flow of vapor. Therefore, the vacuum pump 20 is not always necessary. is not.

Further, in the above method, the special yarn 2 is preheated prior to the shape stabilizing treatment by the high temperature saturated steam, but the preheating is not necessarily required. However,
As described above, in the special yarn 2 containing the easily soluble polymer, it is particularly important to prevent the condensation drain from being generated. Therefore, it is desirable to apply the preheating as much as possible.

Then , prior to the above-described morphological stabilization treatment (when preheating is applied, the preheating is applied), the inside of the processing tank 1 in which the special yarn 2 is loaded may be depressurized. That is, by decompressing the inside of the processing tank 1 in advance, it is possible to perform the morphological stabilization treatment uniformly in a shorter time and to effectively prevent the oxidation of the fibers. In addition, when performing the said pressure reduction, the vacuum degree in the processing tank 1 is set to 10 ^-1 to 1
It is preferable to set it to about 00 Torr.

Further, in the above apparatus, the processing tank 1 is a vertical type, but the processing tank 1 may be a horizontal type. The package form of the special yarn 2 when loaded in the treatment tank 1 is not limited to the above, and can be set appropriately.

The present invention can be used in combination with various known techniques such as the technique of using superheated steam in a certain temperature range in place of saturated steam.

Next, examples will be described.

[0036]

Example 1 Using the apparatus shown in FIG. 1, the following special yarn was subjected to preheating and morphological stabilization treatment with high temperature saturated steam according to the procedure described above. However, the specific processing conditions are as follows.

[0037] [special yarn conditions] · yarn types: water-soluble vinylon and core, blend has been double plied-form cotton fibers as a sheath portion: cheesy Package Weight: about 1 kg / co-loading Number of steps: 6 steps, winding density: 0.33 g / cm ²

[Preheating application conditions] ・ Hot air temperature: 170 ℃ ・ Applying time: 10 min

[0039] [Form stabilization treatment conditions] ・ Steam flow direction: outside → inside cheese ・ Type of steam: 180 ℃ saturated steam ・ Heating condition: 180 ℃ × 5min ・ Amount of steam used: 12 kg / batch (1.5 kg / fiber 1 kg)

The special yarn treated in this manner was scoured and dyed by a general method, and then a double-sided pile woven fabric was prepared under known general conditions.

[0041]

Example 2 The special yarn was not preheated.
Otherwise, the morphological stabilization treatment was performed in the same manner as in Example 1. Then, the special yarn treated in this manner was made into a double-sided pile fabric in the same manner as in Example 1 above.

[0042]

Example 3 The type of special yarn was changed. Otherwise, the morphological stabilization treatment was performed in the same manner as in Example 1. Then, the special yarn treated in this manner was made into a double-sided pile fabric in the same manner as in Example 1 above. [Conditions of special yarn] ・ Type of yarn: Taslan-processed yarn with rayon filament as the core and cotton staples wrapped around it ・ Form: Cheese-like package ・ Weight: about 1 kg / piece ・ Number of stacking steps: 6 steps ・Roll density: 0.30 g / cm ²

[0043]

[Example 4] Using the same special yarn as in Example 3 above, a morphological stabilization treatment was performed in the same manner as in Example 2. Then, the special yarn treated in this manner was made into a double-sided pile fabric in the same manner as in Example 1 above.

[0044]

Comparative Example 1 The special yarn used in Example 1 was subjected to scouring / dying treatment without any treatment, and a double-sided pile fabric was obtained in the same manner as in Example 1.

[0045]

Comparative Example 2 Saturated steam at 150 ° C. was used for the morphological stabilization treatment. Otherwise, in the same manner as in Example 2 above,
A double-sided pile fabric was obtained.

[0046]

Comparative Example 3 Saturated steam at 220 ° C. was used for the morphological stabilization treatment. Otherwise, in the same manner as in Example 2 above,
A double-sided pile fabric was obtained.

In order to evaluate the treatment effect of the pile fabric thus obtained, 100 mm × 100
The sample fabric of mm was cut out, and the appearance and texture after 10 times of washing were sensory-evaluated visually and using a palm.
The results are shown in Table 1 below.

[0048]

[Table 1]

[0049]

INDUSTRIAL APPLICABILITY As described above, according to the present invention, a special yarn having properties such as bulkiness and flexibility is subjected to a morphological stabilization treatment under specific conditions. According to this treatment, the above properties are maintained well for a long period of time, and the texture and feel of the special yarn are not impaired even after passing through the steps such as scouring and dyeing. And, the textile product using the above-mentioned special yarn, even after repeated washing,
The characteristics derived from the special yarn are maintained, resulting in a high quality product.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an apparatus used in an embodiment of the present invention.

Claims (2)

(57) [Claims] 1. A scouring / dying treatment as described above, when a scouring / dying treatment in a package form is performed on a yarn made of a composite of cellulosic fibers and water-soluble synthetic fibers or a yarn made of cellulosic fibers having bulkiness. Prior to the above, by passing saturated steam at 170 to 200 ° C. from the outside of the package toward the inside of the package-shaped yarn, the saturated steam is brought into contact with the yarn to perform the wet heat treatment. A method for stabilizing the shape of a special yarn, which is characterized in that 2. The method for stabilizing the morphology of a special yarn according to claim 1, wherein prior to the moist heat treatment, the package-shaped yarn is contacted with hot air at 100 to 200 ° C. to preheat the yarn. .