JPH03174071A - Low-abrasion and far infrared ray-radiating conjugated fiber - Google Patents

Abstract

PURPOSE:To obtain the subject low-abrasion conjugated fiber by applying a silicone-based lubricant to the surface of a sheath-core type conjugated fiber composed of a polymer containing a ceramics oxide having far infrared ray radiation properties as the sheath component and a polyester as the core component. CONSTITUTION:To the surface of a sheath-core type conjugated fiber composed of a polymer (e.g. polyester-based or polyamide-based) containing, e.g. an alumina-, magnesia- or zirconia-based ceramics oxide in an amount of 3-30wt.% as the sheath component and a polyester as the core component, a lubricant mainly composed of a silicone component such as a methylhydrogenpolysiloxane or an epoxy group containing polysiloxane is made to adhere in an amount of 0.2-5wt.% based on the weight of the fiber, thus obtaining the objective low-abrasion conjugated fiber free from abrasion of equipments or damage thereto frequently occurring conventionally and having excellent far infrared ray-radiation properties.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a synthetic fiber that efficiently emits far infrared rays.More specifically, it relates to a far infrared emitting composite IIN that has a low coefficient of friction and low abrasion. .

<Conventional technology> Conventionally, oxide ceramics made of alumina, zirconia, magnesia, or a composite thereof are
It is known to efficiently radiate far-infrared rays. In addition, when heating an object using far infrared rays, the object to be heated is directly radiant heated, there is little difference in heat transfer time between the surface and the inside, and the entire object is heated almost simultaneously. It is also known that the heating efficiency is high and the heating sensation on the human body is gentle.

In recent years, in order to produce textile products having the far-infrared effect, many methods have been proposed for adding oxide ceramics having the far-infrared radiation to synthetic fibers. However, the method of attaching a treatment agent containing ceramics to fibers has poor adhesion and may fall off due to friction, resulting in a lack of durability. Furthermore, the method of incorporating ceramics into synthetic fibers proposed in JP-A No. 63-196710 requires increasing the content of ceramics in order to obtain a sufficient far-infrared effect. In this case, spinnability deteriorates and ceramics are exposed on the fiber surface, causing wear and damage to various yarn guiding devices and other devices that come into contact with the fibers during post-processing processes (spinning, force-pulling processes, etc.), which is a serious problem in industrial production. There is.

In order to solve this problem in the post-process, a core-sheath type composite fiber in which a ceramic-containing polymer is disposed in the core has been proposed in JP-A-63-92720; A sufficient far-infrared effect cannot be obtained to absorb infrared rays. Also, time opening 0 ((63-1269
Publication 71M uses a core-sheath type composite fiber in which a polymer containing ceramics is placed in the core! ! A method has been proposed in which at least a portion of the coating layer is removed after forming the structure, but this method has the disadvantage that the manufacturing method is complicated and is not suitable for regular use.

(Objective of the Invention) The present invention solves the problems of the above-mentioned prior art, and aims to provide good spinnability, no wear or damage to equipment during handling, and far-infrared rays. The object of the present invention is to provide a composite mu with excellent radioactivity.

(Structure of the Invention) As a result of intensive studies to achieve the above-mentioned object, the present inventors surprisingly found that a specific material is formed on the surface of a core-sheath composite fiber whose sheath portion contains ceramics having far-infrared radiation. The present invention was achieved by discovering that by applying a treatment agent, it is possible to significantly reduce equipment wear while maintaining far-infrared radiation.

That is, according to the present invention, a core-sheath type composite 1 having a polymer containing 3 to 30% by weight of a ceramic oxide having far-infrared radiation as a sheath component and a polyester as a core component
! A low abrasion fiber, characterized in that a smoothing agent mainly composed of silicone is attached to the surface of the composite fiber in an amount of 0.2 to 5% by weight based on the weight of 4111 as an active ingredient. A far-infrared emissive composite fiber is provided.

The oxide ceramics used in the present invention include, for example, alumina (AuzOa)-based ceramics.

Magnesia (IvloO) series, zirconia (Zr 02
) series, titania (T! 02 ) series, silicon dioxide (SfOz), chromium oxide (Cr 202 ), 7
Elite ("eOz ・Fe a 04), Spinel (MgO-A1203>, Ceria (Ce 02)
.

Examples include beryllia (Be O). Among such ceramics, far infrared emissivity at 30°C is 4.5 to
It is preferable to have 65% or more in an area of 30 μm,
In particular, 75% or more is desirable. Further, it is desirable to use the oxide ceramics by finely pulverizing the particles to a particle size of 5 μm or less, preferably 1 μm or less.

As a method for incorporating oxide ceramics into the fiber-forming polymer, any method may be adopted, such as adding it in the polymerization process of the polymer, or kneading it as a master chip with a pace chip in the spinning process. It is preferable to mix and melt-spun the master chip and the pace chip using a twin-screw router, since the dispersion state of the oxide ceramic becomes uniform and the spinning properties are improved.

The polymer for the sheath component used in the production of the composite I fiber of the present invention does not need to be particularly limited, but includes thermoplastic polymers, such as polyolefins such as polyethylene and polypropylene,
Polyesters such as polyethylene terephthalate and polybutylene terephthalate, nylon-6, nylon-6,
Polyamide such as No. 6 is preferably used.

On the other hand, as the polymer for the core component, polyesters such as polyethylene terephthalate and polybutylene terephthalate are used, since it is necessary to have excellent Il fiber-forming ability. In other words, in the present invention, since a polymer containing serrax oxide is used as a sheath component, the sheath component alone provides poor spinnability and poor quality. Along with making it better! III. It is necessary to have excellent physical properties.

The content of ceramic oxide in the sheath component should be 3 to 30% by weight, preferably 5 to 15% by weight. If the content is less than 3% by weight, far-infrared radiation performance is insufficient and satisfactory performance cannot be obtained. On the other hand, if it exceeds 30% by weight,
This is undesirable because not only the spinnability of the composite fiber decreases and fiberization becomes difficult, but also the physical properties of the fiber deteriorate.

The ratio (weight) of sheath component and core component is 70/30-40/
A range of 60 is preferred. When the ratio of the core component decreases, spinnability deteriorates, and when the ratio of the -5 sheath component decreases, it is necessary to increase the content of ceramic oxide in the sheath component in order to obtain sufficient far-infrared radiation performance. This results in poor spinnability.

In the present invention, 0.2 to 5% by weight (based on the weight of m fibers) of a smoothing agent mainly containing a silicon component is applied to the surface of the composite fiber containing the above-mentioned oxide ceramics.
It is important to provide this.

Note that "containing mainly" here means that the content of the silicon component in the treatment agent is 60% by weight or more, and if the content of the silicon component is less than this, the IliwA of the obtained fibers will be reduced. There is a tendency for the effect of reducing the

As the silicone component, non-reactive polysiloxanes such as dimethylpolysiloxane and diphenylpolysiloxane may be used alone, but components that form a reaction-cured film on the m-grain surface, such as methylhydrodienepolysiloxane, epoxy Group-containing polysiloxane, amino group-containing polysiloxane.

The use of reactive polysiloxanes such as oxyalkylene group-containing polysiloxanes, methylpolysiloxanes, and alkoxypolysiloxanes alone or in combination with the above-mentioned non-reactive polysiloxanes may result in It is particularly preferable because the mechanical properties are improved and the durability of the effect of reducing friction is improved, and far-infrared radiation is not reduced. Furthermore, it may be a processing agent whose crosslinking properties are improved by adding a low-molecular crosslinking agent such as aminosilane. In addition, since silicon components generally have low antistatic properties, it is preferable to use a small amount of antistatic agent in combination. Any type of antistatic agent, cationic or anionic, may be used, and commonly used antistatic agents may be used as they are.

In order to apply such a treatment agent to mr4, it is in a solution state.

It can be applied in either emulsion state or
It is necessary to adjust the amount of the active ingredient to 0.2 to 5% by weight (relative to the weight of the fiber), preferably 0.5 to 3% by weight. As a result, the wear of equipment caused by oxide ceramics cannot be eliminated.

On the other hand, if it exceeds 5% by weight, the smoothness becomes too high, the IllI intercalation property in the carding process etc. deteriorates, and a uniform web and spun yarn cannot be obtained.

In addition, when using the processing agent as an emulsion,
It is preferable to use commonly used emulsifiers.

(Effects of the Invention) The far-infrared emissive composite III of the present invention has a polysiloxane treatment agent applied to its surface, so there is no wear and tear on equipment, which has occurred frequently in the past, and it has good far-infrared radiation. It becomes possible to efficiently produce spinning systems, nonwoven fabrics, etc. with excellent quality.

(Example) Hereinafter, the present invention will be explained in more detail with reference to Examples.

Examples 1-4. Comparative Examples 1 to 3 The emissivity within the wavelength range of 4.5 to 30μ wind is 70% or more at 30°C, the average emissivity is 75%, and the average particle size is 0.9
μU ceramic oxide (zrOz/S!Oz/
Fe 203-64/35/1) and polypropylene fine powder with a melt index of 50 at 230°C are mixed and then melted to form a ceramic oxide of 40% by weight.
A master chip containing the following was created.

Next, this master chip and polypropylene with a melt index of 50 at 230°C were blended at a ratio of 1:3, and melted at 230°C using a twin-screw router to form a sheath component, and polyethylene terephthalate with an intrinsic viscosity of 0.64 was mixed. The core component was supplied to a core/sheath type composite spinning device at a discharge weight ratio of 50:50, spun through a nozzle with a hole diameter of 0.5 Mφ, and wound up at a spinning speed of 700 m/win.

The obtained undrawn yarn was bundled to 4 million denier, stretched 3 times in hot water at 70°C, treated with the treatment agents listed in Table 1 to give various amounts of active ingredients, and then crimped. After that, it was heat-treated at 140°C and cut into fibers with a length of 51.

The obtained fibers had a single denier of 6 denier and were uniformly dispersed in the composite II miscellaneous sheath layer of oxide ceramics (3000
(Illustrated under a magnified electron microscope).

The obtained fiber was passed through a roller card at 100g/TI.
After creating a web of T, needle punching was performed using a needle punch machine manufactured by Feller under the conditions of barb #36 regular punch density 30F/cd double-sided punching and n depth of 19m+ in order to improve the entanglement between fibers.

Table 1 shows the results of equipment wear, needle drops, etc. in the carding process and needle punching process.

In addition, the obtained nonwoven fabric was attached to the arm, and changes in skin temperature were measured. The results are also shown in Table-1.

Examples 5-8. Comparative Examples 4 to 5 Nonwoven fabrics were obtained in the same manner as in Example 1, except that the type and amount of oxide ceramics were changed as shown in Table 2. The results are shown in Table-2.

Claims (1)

[Claims] 3 to 3 ceramic oxides with far-infrared radiation
It is a core-sheath type composite fiber having a polymer containing 0% by weight as a sheath component and a polyester as a core component. A low abrasion far-infrared emissive composite fiber characterized in that it has an adhesion of 0.2 to 5% by weight.