JP2544541B2 - Method for producing electrostatic rayon fiber - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a chargeable rayon fiber containing tourmaline ultrafine particles, which is suitable for use in a health fiber product which has an activating effect on living cells.

[0002]

2. Description of the Related Art So-called health clothing, in which a ceramic emitting far infrared rays is attached to clothes and underwear, is known (Japanese Utility Model Publication No. 62-122813 and Japanese Utility Model Publication 62-42).
848). This kind of health clothing uses the characteristics of far infrared rays radiated by ceramics to warm the body from the deep part and to obtain effects such as promoting blood circulation.

On the other hand, it is also known that an artificially electrified artificial electret is attached to clothing, a duvet cover or the like, and the body is stimulated by an electrostatic field possessed by the artificial electret to promote blood circulation. Kaisho 61-912
37, and Japanese Utility Model Laid-Open No. 61-180045).

This kind of artificial electret is one in which a synthetic resin such as polypropylene is made into an electret by corona charging, friction treatment or the like, and in particular, it is charged after a film material, a sheet material or a non-woven fabric is formed. It is something.

In the former clothing and the like which uses far infrared rays,
By heating a far-infrared radiator such as a ceramic with the body temperature of the human body, far-infrared rays are emitted from this radiator. However, it is difficult to radiate a large amount of far infrared rays in a temperature range in which the body temperature can be warmed, that is, 40 ° C. or lower. For this reason, the amount of far-infrared radiation that is emitted from a ceramic or the like by heating only with body temperature must be limited, and the effect on the body is also proportional to this amount of radiation.

On the other hand, the latter ones using electrets all have a drawback in that they cannot use a sufficient amount of electricity to maintain the health of the body because they use artificially electretized materials. That is, there is a voltage of several tens of mV (hereinafter referred to as skin potential) between the front surface and the back surface of human skin. It is expected that a voltage of several mV or more is required to try to influence the skin potential. However, the polarization charge that can appear in the artificial electret material is about 0.2 eV to 0.7 eV, and it is difficult to affect the skin potential with this polarization charge.

Moreover, this artificial electret is extremely vulnerable to heat, and the charge amount is significantly attenuated due to temperature rise.
At about 0 ° C to 80 ° C, most of the charge amount is lost. Therefore, like rayon fiber,
In addition to the fact that the fibers themselves heated during the spinning process cannot be electretized, the electretized fiber products cannot be subjected to heat treatment such as cleaning or ironing.

[0008]

DISCLOSURE OF THE INVENTION The present invention maintains a stable electret effect, electrically stimulates the skin potential of the human body, and radiates far-infrared rays to the stimulating skin surface. , Promotes metabolism and blood circulation of the body, has a particularly remarkable effect on the prevention of cold disease, stiff shoulders and aging, without losing the charge amount in the heating process or heat treatment, and in the same manner as ordinary fiber products. The purpose is to provide a chargeable rayon fiber that can be handled.

[0009]

Means for Solving the Problems The present inventor has conducted extensive studies to develop a chargeable rayon fiber having a stable electret effect, and as a result, it has been used as a jewel or the like and is now artificially synthesized. It is also possible to achieve the purpose by kneading tourmaline, which is also possible, into very fine particles with an average particle size of 0.5μ by grinding with a specific method, and kneading and spinning this with alkali cellulose. The present invention has been completed based on the findings of this finding.

That is, according to the present invention, tourmaline is dry pulverized to an average particle size of 2 to 3 μ, then wet pulverized to an average particle size of 1 μ or less, and then classified to remove particles having a particle size of 1 μ or more. Add a dispersant and filter to a particle size of 0.8
The average particle size is 0.5μ as a filtered product
To provide ultrafine particulate tourmaline, add it to carbon disulfide and caustic soda to alkali cellulose as it is, knead under vacuum, and age and spin. .

In the method of the present invention, the tourmaline used as the electret material is one of naturally occurring gems, and its polarization charge is 5.34 V at a size of 20 mm and 2
It is 2.34V in the size of mm (confirmed by the test by Japan Electronic Components Trust Center). This tourmaline exhibits electric characteristics as an electret, and is a substance that has permanent spontaneous polarization, and does not change the polarization vector under the influence of an external electric field. Further, tourmaline has the strongest electret property among minerals, and the radiation amount of far infrared rays is also recognized.

[0012] Since this tourmaline is a mineral and contains a plurality of components each having a different composition, it is difficult to make it fine by just pulverizing it according to a conventional method, and even if it can be made fine, it has the electret characteristic. It cannot be collected as expensive.

Usually, fine particles having an average particle size of 0.5 μ are aggregated in water to cause clogging of the filter, and therefore, although the separation by filtration is impossible, in the method of the present invention, the aggregation is performed. After being classified by a conventional means to a particle size that does not cause the occurrence of particles, a dispersant is further added and filtration is performed while suppressing aggregation, so that the average particle size of 0.
A fine tourmaline of 5μ can be obtained, and this is added to the alkali cellulose as it is obtained as a filtered product, so that the dispersant is attached to the surface of the tourmaline particles, which is formed by carbon disulfide and caustic soda. When the vacuum kneading is performed in cooperation with the dispersing action based on zanthate, uniform dispersion is performed in the alkali cellulose.

The present invention will now be described in more detail with reference to the accompanying drawings. FIG. 1 is a process diagram showing an example of a crushing process according to the present invention.
In (2), after being pulverized to an average particle size of 2 to 3 μ, it is pulverized to an average particle size of 1 μ or less in the wet pulverization step 2. The pulverized product is then sent to a classification step 3, where particles having a particle size of 1 μm or more are removed by a filter. Next, a dispersant was added to the classified particles, and the particle size was adjusted to 0.8 again.
Classifying treatment is performed to μ or less, and ultrafine particle tourmaline having an average particle size of 0.5 μ is obtained.

The ultrafine particulate tourmaline thus obtained is kneaded into the raw material cellulose, spun into the rayon fiber, and activates the skin potential of the skin covered with the rayon fiber material. Apply electrical stimulation.

[0016]

[Function] Rayon fiber containing this fine particle tourmaline
It has the following effects on the human body. That is, the tourmaline contained in the rayon fiber has an extremely high polarization charge. Therefore, the rayon fiber containing this tourmaline is always placed under an electrostatic field due to tourmaline. Therefore, when a shock is given by contact between fibers or the like, an extremely high-order electric current is generated, and an electric field sufficient to affect the skin potential of the skin covered with the rayon fibers is generated.

The skin potential of the human body is usually several tens of mV, but it is known that this voltage is not constant and varies depending on changes in physical condition and exercise amount. In particular, the membrane potential of a cell is the osmotic pressure due to the difference in ion concentration between substances inside and outside the cell,
It refers to the potential difference generated inside and outside the cell by active transport by the Na pump of the cell itself, and a cell membrane potential of nerves and muscles of about 50 to 80 mV has been observed. This membrane potential disappears when the cell membrane dies, and on the other hand, when the cell is activated or the cell membrane is stimulated, an active potential is generated in the cell membrane. Then, the excitement of the cell membrane due to this action potential is fed back to the central nerve to regulate the independent nervous system and the motor nervous system.

[0018]

EXAMPLE An example of the present invention will be described below with reference to the process chart of FIG. That is, in the dry pulverization step 1, a dry pulverizer is used to pulverize a tourmaline raw material from a size of a human head to an average particle size of 2 μ to 3 μ. In this dry crushing process, a jaw crusher is used to crush from a head size to a fist size, and a hammer crusher is used to crush from a fist size to a diameter of 2 to 3 cm. Also, using a Raymond mill, crush from a diameter of 2 to 3 cm to a diameter of 6 to 7 mm, and further, using a ball mill, a diameter of 6 to 7 mm.
To 4 to 6 μm in diameter.

Next, in the wet crushing step 2, the wet crusher 1
Grind to a size of μ or less. Here, a ball mill is used to once pulverize from an average particle diameter of 4 to 6 µ to a diameter of 2 to 3 µ, and then again to be pulverized to a size of 1 µ or less using a ball mill. At this time, the wet crusher preferably uses a ball mill using zirconium beads having a diameter of 0.5 to 1.0 mm and rotary blades made of soft polyurethane.

Further, in the classification step 3, particles having a size of 1 μ or more are removed and classified by a filter, and a dispersant is mixed into the classified particles. As the dispersant used at this time, for example, a dispersant which is commercially available under the trade name of higher carboxylic acid or demol or degnin is used. Then, the ball mill used in the wet pulverization step 2 is reused and stirred for about 30 hours, and then classified with a filter into ultrafine particle electrets having a diameter of 0.8 μ or less (average particle size 0.5 μ). Immediately before mixing with the alkali cellulose, final homogenization is performed using a homogenizer to uniformly disperse the classified ultrafine particle electrets.

In the spinning step of rayon mixed with ultrafine particle-shaped tourmaline, ultrafine particle-shaped tourmaline classified into particles having an average particle size of 0.5 μ is vacuum-kneaded into alkali cellulose together with carbon disulfide and caustic soda in a vacuum kneader.
Then, after being dissolved in a dissolver and then aged in an aging tank to obtain a raw material cellulose, it is spun in a usual rayon spinning step to form a predetermined fiber.

Next, the rayon fiber obtained in the present invention was used to form a lining A for training wear (using the rayon of the present invention 3: a blended yarn of cotton 7), and a lining B formed of this lining and ordinary fibers (conventional). The radiation amount of far infrared rays with (rayon 3: cotton 7 blended yarn) was measured. The result is shown in FIG. This measurement is a measurement of the far-infrared radiation amount (W / m ² ) in the temperature range of 25 to 50 ° C. As a result, in the body temperature range of 30 to 36 ° C, 6 (W
/ M ² ) to 8 (W / m ² ) energy difference was observed.

Further, a comparative experiment was carried out on the physical strength measurement when the training wear using this lining and the training wear using a normal lining were worn.
The experimental results are shown in FIGS. 2 and 3.

This experiment shows the results of physical fitness measurements carried out 30 minutes after wearing each training wear.
The physical fitness measurement includes an endurance test using data calculated from oxygen intake per minute using an exercise bike, and vertical jump, standing forward bending, grip strength, and repeated lateral jump.

As a result, especially in endurance and grip strength,
The effectiveness of the lining using the rayon fiber of the present invention was recognized, and a clearer difference appeared in those who were weak in strength and inferior in physical strength.

FIG. 5 shows comparative data of far-infrared emissivity in the body temperature range (37.5 ° C.) between the nonwoven fabric C made of the rayon fiber of the present invention and the nonwoven fabric D made of the conventional rayon fiber (Fukui Prefectural Industrial Technology). Depending on the center). As is clear from this figure, the far-infrared emissivity of the rayon fiber obtained in the present invention is stable when the distribution range of each wavelength is around 65% compared to conventional rayon. Was done. This shows the effectiveness of far infrared rays emitted by the rayon fiber of the present invention in the body temperature range.

[0027]

As is apparent from the above measurements and experiments, according to the present invention, a rayon fiber that effectively functions as an electret can be obtained, and a health fiber product that gives an activating effect to living cells is provided. Will be possible.

That is, by mixing ultrafine particulate tourmaline classified to 0.5 μ or less together with a dispersant, vacuum-kneading the alkali cellulose with carbon disulfide and caustic soda, and spinning the rayon fiber from the aged raw material cellulose, It has become possible to uniformly mix an extremely large amount of ultrafine particulate tourmaline inside and on the surface of rayon fiber having many pores. As a result, the contact efficiency of the ultrafine particle tourmaline becomes extremely high on the inner peripheral surface of the pores and inside the fiber, and a high polarization charge can be efficiently obtained. Moreover, since the external environment of rayon is constantly changing in both pressure and temperature, it gives permanent kinetic energy to the ultrafine particle tourmaline, and a permanent effect is obtained.

Further, tourmaline shows a higher polarization charge as it heats up, and its piezoelectric coefficient becomes higher.
It is extremely heat resistant. Therefore, a spun fiber obtained by kneading ultrafine particle tourmaline in a vacuum and using a raw material cellulose aged at a high temperature as a raw material exhibits extremely high electret properties, and a raw yarn formed from this spinning dope is
It shows an extremely high potential. In addition, the fiber product formed from this raw yarn has the property that the amount of electric charge is not attenuated by cleaning or the like and that a high electric potential is obtained again when it is dried at high temperature or ironed.

Similarly, far-infrared rays that radiate a larger amount than conventional rayon fibers and have a stable wavelength in the temperature range of body temperature become thermoconducting energy. However,
This radiation amount is weak in a temperature range around body temperature, but it is a sufficient amount to reach the skin surface to the new skin. Therefore, since the far-infrared rays are emitted at the same time as the above-mentioned electrical stimulation is given to the skin surface, the synergistic effect of the far-infrared rays and the polarization charge and the piezoelectric power of these tourmaline stimulates the cell tissue, and the stimulation is performed. Activates the membrane potential of the cell membrane, promoting metabolism and circulation of blood circulation.

As described above, according to the present invention, a stable electret effect is maintained, electrical stimulation is given to the skin potential of the human body, and far infrared rays are radiated to the skin surface to be stimulated. It promotes the metabolism and blood circulation of the body, and in particular, it has a remarkable effect in preventing cold disease, stiff shoulders and aging, and the electretized fiber product is a normal fiber product without losing the charge amount in the heating process or heat treatment. It has a remarkable effect that it can be handled in the same manner as.

[Brief description of drawings]

FIG. 1 is a process diagram showing a crushing process.

FIG. 2 is a diagram showing a balance sheet in which the results of physical strength measurements are recorded by wearing a jersey using a normal rayon material as a lining.

FIG. 3 is a diagram showing a balance sheet in which the results of physical strength measurement are recorded by wearing a jersey using a rayon material mixed with tourmaline as a lining.

FIG. 4 is a diagram showing far-infrared radiation amounts of a normal rayon material and a rayon material mixed with tourmaline.

FIG. 5 is a diagram showing far-infrared emissivity of normal rayon and rayon material mixed with tourmaline.

[Explanation of symbols]

A Lining of Training Wear with Rayon Fiber Obtained in the Present Invention B Lining Made of Normal Fiber C Nonwoven Fabric Made of Rayon Fiber of the Present Invention D Nonwoven Fabric Made of Conventional Rayon Fiber 1 Dry Grinding Step 2 Wet Grinding Step 3 Classification Step

Claims (2)

(57) [Claims] 1. Tourmaline is dry-ground to an average particle size of 2 to 3 μ, then wet-ground to an average particle size of 1 μ or less, then classified to remove particles having a particle size of 1 μ or more, and a dispersant is further added. Filtered to collect particles with a particle size of 0.8μ or less, obtain ultrafine particulate tourmaline with an average particle size of 0.5μ as a filtered product, add it directly to alkali cellulose along with carbon disulfide and caustic soda, and vacuum. A method for producing a chargeable rayon fiber, which comprises kneading, aging and spinning. 2. The method for producing a chargeable rayon fiber according to claim 1, wherein the wet-milling of tourmaline is carried out using zirconium beads in a ball mill equipped with a soft polyurethane rotary blade.