JPH04163330A - Production of heat-insulating finished yarn having composite structure - Google Patents

Abstract

PURPOSE:To obtain the subject finished yarn having excellent heat-insulation by doubling an undrawn yarn containing a specific fine ceramic particle and another undrawn yarn having a thermal shrinkage different from that of the former yarn and subjecting the double yarn to relaxed heat-treatment, false- twisting and liquid entangling treatment. CONSTITUTION:A highly oriented undrawn yarn A is produced by adding 0.1-20wt.% of fine ceramic particles capable of emitting far infrared-ray (e.g. zirconium oxide) to a polyester. Separately, another highly oriented undrawn yarn B having different thermal shrinkage from that of the former undrawn yarn A is produced exclusively with a polyester. Both yarns are doubled with each other using a 1st feed roller, subjected to relaxed heat-treatment with a non-contact heater 2 at an over-feed ratio of >=10%, twisted with a frictional false-twisting frame 5, entangled with a liquid entangling apparatus 7 and wound with a winding roller 9 to obtain the objective finished yarn.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a method for manufacturing a heat-retaining composite textured yarn having heat-retaining properties and a swelling effect suitable for cold-weather clothing.

(Prior art) Conventionally, in the field of cold-weather clothing, a method has been used in which a metal such as aluminum or titanium is vapor-deposited or coated on one surface of the fabric in order to impart heat retention (=1) to the fabric. Fabrics that have been vapor-deposited or coated are covered with coarse dust.

In addition to being uncomfortable, the vapor-deposited or coated metal tends to peel off easily.

For example, to overcome the above drawbacks.

Japanese Unexamined Patent Publication No. 62-238811 discloses a method of increasing the sustainability of the heat retention effect by incorporating ceramic fine particles having far-infrared radiation ability into fibers. However, these threads have no bulge;
Although it has a heat retention effect due to its ability to emit far infrared rays, heat dissipation due to heat conduction is strong.

In addition, the heat shielding effect from the outside air is insufficient.

It had the drawbacks of being cold to the touch and having a strong roughness.

As a way to overcome these drawbacks, it is possible to use fibers that contain ceramic fine particles that have far-infrared radiation ability by subjecting them to false twisting and crimping. When tension is applied during the weaving process (i.e. weaving process or knitting process), the volume easily decreases.
When it was made into a fabric, the bulk was small, and it was not possible to obtain a fabric with a high air-retaining effect.

On the other hand, many methods have been proposed to create loops, slacks, etc. in multifilament yarn to give it fullness and to approximate the appearance and texture of spun yarn, with Taslan processed yarn being a representative example.

However, with Taslan processed yarn, the yarn swells due to the presence of loop fuzz, giving it the appearance and feel of spun yarn, but since the five fuzz is in the form of loops, it becomes coarse fluff, has little air-capturing effect, and has no heat retention effect. Furthermore, the entanglement of the filaments gave a loose feel, making it impossible to obtain a fabric that was soft and had a high heat-retaining effect.

(Problems to be Solved by the Invention) The present invention eliminates the above-mentioned drawbacks and improves the effective performance regarding heat retention, which is far-infrared radiation ability, and conversely decreases the heat retention effect due to the increase in thermal conductivity. It is a technical issue to provide a method for manufacturing a composite structured yarn that can improve this disadvantage and also improve the feel of filament yarn, which is cold and has a strong stiff wind.

(Means for Solving the Problems) As a result of intensive studies in order to solve the above problems, the present inventors have found that a filament containing a yarn containing ceramic fine particles having far-infrared radiation ability and ceramic fine particles. The present invention was achieved based on the discovery that by creating a specific structure and form of a yarn that was not previously available, a yarn with unprecedented heat retention and a fluffy texture similar to that of a spinning system could be obtained.

That is, 1 the present invention provides a highly oriented undrawn polyester yarn (A) containing 0.1 to 20% by weight of ceramic fine particles capable of emitting far infrared rays, and a polyester yarn having a different heat shrinkage rate from the undrawn yarn (A). The highly oriented undrawn yarn (B) is aligned and subjected to relaxation heat radiation without contact with a heater at an overfeed rate of 10% or more. The gist of the present invention is to provide a method for producing heat-retaining composite structured yarn, which is characterized by subjecting the yarn to a fluid entangling treatment.

The present invention will be explained in detail below.

The present invention provides a highly oriented undrawn polyester yarn (A) containing 0.1 to 20% by weight of ceramic fine particles capable of emitting far infrared rays, and a highly oriented polyester yarn (A) that has a different heat shrinkage rate from the undrawn yarn (A). The undrawn yarn (B) is used as a supply system.9 The far-infrared radiation ability as used in the present invention refers to the ability to absorb electromagnetic waves in a wavelength range other than far-infrared rays, and then convert them into far-infrared rays and radiate them. At the same time, it has the property of reflecting far infrared rays. Ceramics having the above-mentioned capabilities include oxides of manganese, zinc, etc., and mixtures thereof, zirconium, hafnium,
Mention may be made of oxides and carbides such as tantalum.

Note that titanium oxide, which is used to change the degree of gloss, is not included in certain ceramics that have far-infrared radiation ability as referred to in the present invention.

The content of ceramic fine particles in the undrawn filament (A) is preferably in the range of 0.1 to 20% by weight, and if this content is less than 0.1%, the desired heat retention property cannot be obtained. On the other hand, if it exceeds 20%.

The strength and elongation of the yarn will decrease.

The undrawn yarn (A) contains ceramic fine particles.

When manufacturing polyester fiber, there are blending methods in which ceramic fine particles are mixed in a process before spinning and then spun.
It can be obtained by a composite spinning method, etc., in which polyester containing ceramic fine particles is spun to form a core and polyester not containing ceramic particles is spun to form a sheath.

First, in the present invention, a highly oriented undrawn yarn (A) containing ceramic fine particles and a highly oriented undrawn polyester yarn (B) having a different heat shrinkage rate from the undrawn yarn (A) are aligned and At a feed rate of 10% or more.

Relaxation heat treatment is performed without contacting the heater.

That is, when two types of highly oriented undrawn polyester yarns are aligned and heat treated at an overfeed rate of 10% or more, 2
Differences in physical properties occur between the filaments and within the filaments due to the difference in heat shrinkage rate between the undrawn and undrawn seeds, and bulges are obtained due to the yarn length differences between the filaments and within the filaments by the subsequent drawing and false twisting process, and the inside of the yarn is Because it can retain a lot of air.

It can enhance the heat retention effect.

Although either of the two types of highly oriented undrawn polyester yarns (A) and (B) may have a larger heat shrinkage rate, it is preferable that the difference is 5% or more.

Further, the upper limit of the overfeed rate may be set to a level at which the yarn does not run out and come into contact with the heater, causing two yarn breakages.

The heater temperature during the heat treatment is preferably 100° C. or more higher than the melting point. If the heat treatment is performed at a temperature lower than this temperature, the amount of thermal shrinkage will be small, so the yarn will tend to swing out in the heater and cause yarn breakage.

Furthermore, the relaxation heat treatment time depends on the heater temperature, but the relaxation heat treatment time is 0.
．． A short time of 2 seconds or less is preferable. Short-time heat treatment causes large differences in physical properties between and within filaments, and increases the occurrence of loops and sag. Subsequent drawing and false twisting treatment causes yarn length differences and The heat retention effect of air can be enhanced. On the other hand, when the relaxation heat treatment time exceeds 0.2 seconds.

This is undesirable because the filament comes into contact with the surface of the heater, causing fusion or single filament breakage, or because the filament is heated uniformly, making it difficult for heat treatment unevenness to occur.

In the present invention, after the two types of undrawn yarns (A) and (B) are subjected to relaxation heat treatment, these yarns are subsequently subjected to a stretching false twisting process. is 1,5
0 to 2.50 times, heating tension (T+) and untwisting tension (T2)
It is preferable that the ratio T2/T is 0.5 to 1.0.

If the stretching ratio exceeds 2.50 times, the threads tend to break, while if it becomes less than 1.50 times, fluctuations in processing tension occur and untwisting tends to occur, which is not preferable. Further, if the value exceeds 1.0, fluff will easily occur in the yarn, and if it is less than 0.5, untwisted yarn will not be generated, which is not preferable.

In order to perform the above-mentioned draw false twisting process, it is necessary to be able to handle high speeds and have a yarn feeding effect, and to be able to false twist yarns with different yarn lengths without generating pilling. It is preferable to use a point-to-point friction type false twisting device.

In the present invention, two types of undrawn yarns (A) are subjected to relaxation heat treatment.

After subjecting (B) to a drawing false twisting process, a fluid entanglement process was performed to mix two types of yarn filaments.

Obtain heat-retaining composite structured yarn.

In the above fluid entangling process, if the yarns are strongly entangled, the bulge caused by the difference in yarn length will be reduced.

It is preferable to provide 70 entanglements of 7 m or less.

The composite structured yarn obtained by the present invention is made of a polyester yarn containing 0.1 to 20% by weight of ceramic fine particles capable of emitting far infrared rays, and another yarn having a different heat shrinkage rate from the aforementioned yarn. Moreover, the difference in shrinkage occurs due to the difference in heat shrinkage rate.

There is a bulge effect due to the yarn length difference between and within the filament, and air can be retained in the many spaces formed between these bulges, so the heat retention effect due to far infrared rays radiation ability is achieved by the air layer inside the yarn. can be further improved by the presence of

Next, the method for manufacturing the heat-retaining composite textured yarn of the present invention will be described in the first step.
This will be explained using figures.

The highly oriented undrawn polyester yarn containing ceramic fine particles (A) and the highly oriented undrawn polyester yarn containing no ceramic fine particles (B) are aligned by the first feed roller 1, and the first feed roller 1 and the second feed roller 3 are aligned. During this period, relaxation heat treatment is performed by the non-contact heater 2.

Next, the second feed roller 3 and the first delivery roller 6
At the same time, the fibers are stretched by the friction false twisting device 5 and heat set by the non-contact type heater 4.

Subsequently, after being entangled by a fluid entangling device 7 provided between the first delivery roller 6 and the second delivery roller 8, the sheet is wound up into a package by a winding roller 9.

(Function) The present invention uses a highly oriented undrawn polyester yarn containing 0.1 to 20% by weight of ceramic fine particles capable of emitting far infrared rays, and a highly oriented undrawn polyester yarn having a different heat shrinkage rate from the yarn. Since the drawn yarn is used as the supply system, relaxation heat treatment is possible.
By applying the drawing and false twisting process to the interlacing process, it is possible to obtain a processed yarn with a composite structure that has a swelling effect due to the difference in yarn length between and within the filaments.

The composite structure processing system obtained by the present invention can retain air in the many spaces formed between these bulges, so the heat retention effect due to far infrared radiation ability is further enhanced by the presence of air layers within the yarn. It can be improved.

(Example) Next, the present invention will be specifically explained using examples.

Example 1. Comparative Example 1 A polyethylene terephthalate master chip containing zirconium carbide fine particles was produced by a melt mixing method. Next, by extruding this master chip and polyethylene terephthalate at a weight ratio of 15:85 into a core/sheath composite yarn using a melt spinning machine capable of high speed spinning, a polymer containing fine zirconium carbide particles was placed in the core. Zirconium carbide fine particle content 5.0% by weight, birefringence index (Δ
n) is 54.6×10-3. 2 with hot water shrinkage rate of 42.0%
A highly oriented undrawn polyester yarn of 10d/48f was obtained.

The undrawn yarn obtained above has a birefringence (Δn) of 55.7×10−′ without containing zirconium carbide fine particles.

A highly oriented undrawn polyester yarn of 220d/72f with a hot water shrinkage rate of 58.2% was aligned, and a stretching friction false twister with a twisting device having a disk configuration of 1-'-10-1 was used. It was subjected to relaxation heat treatment and stretching friction false twisting under the conditions shown in the table, then subjected to fluid entanglement treatment, and then rolled up into a package.

In addition, as Comparative Example 1, processed yarn was produced in the same manner as in Example 1, except that a highly oriented undrawn polyester yarn containing no zirconium carbide particles was used instead of a highly oriented undrawn polyester yarn containing fine zirconium carbide particles. did.

The obtained processed yarns are used as warp and weft respectively, and are placed on an ordinary loom (
(manufactured by Tsudakoma), warp density 82/2.54cm,
It was woven with a plain weave at a weft density of 52 threads/2.54 cm.

Next, the obtained fabric was dyed according to a normal polyester dyeing method to make a finished product, and the heat retention properties were as shown in Table 1.

112= Chapter 1 Table Note that the yarn length difference was measured in a first-order manner.

First, the thread is 0. The sample length is 20 by applying a load of Ig#.
Mark the top and bottom of the cm. Next, the upper end of the sample is fixed and the fibers are separated into single filaments that make up the yarn.
0.1 for monofilament. A load of g/d is applied and the length is measured. Similarly, the lengths of all the filaments constituting the yarn were measured and calculated using the following equation.

In addition, the heat retention property was measured in a constant temperature room at 20°C and 60% humidity using 500W white light as an energy source, with a distance of 1m between the white light and the fabric, and the temperature of the fabric surface 10 minutes after irradiation with the white light. It showed the temperature.

The fabric using the processed yarn obtained in Example 1 had a moderate difference in yarn length, a sense of bulge between and within the filaments, and good heat retention.

On the other hand, the fabric obtained in Comparative Example 1 had a small difference in yarn length and did not contain zirconium carbide, so its heat retention was inferior to that of the fabric obtained in Example 1.

(Effects of the Invention) Since the present invention has the above configuration, the composite structure processing system obtained by the present invention has a swelling effect due to the yarn length difference between and within the filaments, and has an aeration effect of the entire yarn. can be increased. Therefore, when used as a fabric, the presence of ceramic fine particles absorbs electromagnetic waves in wavelength ranges other than far infrared rays, converts them into heat, and radiates them. Because it can store heat in layers and suppress heat radiation to the outside,
Heat retention is greatly improved.

[Brief explanation of the drawing]

FIG. 1 is a schematic process diagram showing one embodiment of the present invention. 2.4 Heater 5 Frictional false twisting device 7 Fluid exchange i8 device

Claims (1)

[Claims] (1) Ceramic fine particles with far infrared radiation ability are added to the
Highly oriented undrawn polyester yarn containing 1 to 20% by weight (
A) and the highly oriented undrawn polyester yarn (B), which has a different heat shrinkage rate than the undrawn yarn (A), are aligned and subjected to relaxation heat treatment at an overfeed rate of 10% or more without contact with a heater. 1. A method for producing a heat-retaining composite textured yarn, which comprises subjecting the yarn after the relaxation heat treatment to a drawing false twisting process, and then subjecting it to a fluid entanglement process.