JPH05256464A - Hot carpet and hot carpet cover - Google Patents

Abstract

PURPOSE:To make it possible to judge whether or not a hot carpet is electrically energized by eye by employing complex fibers containing material which is reversibly, thermally discolored as a part of fibers constituting the surface layer of the hot carpet. CONSTITUTION:Part of the surface layer of a hot carpet 1 is comprised of synthetic fibers containing material which is reversibly, thermally discolored and, as the synthetic fibers, complex fibers comprising thermoplastic polymers containing microcapsuled materials which are reversibly, thermally discolored are used. In the case that, for example, the carpet 1 has no changeover of electric heating region, characters 2 or patterns 3 are formed on a part of or the whole of the carpet 1 using the complex fibers containing the material so that electric heating can be displayed by the reversible change of color tone of the characters 2 or patterns 3. As a result, whether or not there is electric power supply can be clearly judged usually.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to hot carpets and hot carpet covers. In detail, it is extremely easy to know whether or not it is in an electrically heated state, and there is no loss of the reversible thermochromic material due to friction, bending, washing, etc. The present invention relates to a hot carpet and a hot carpet cover that have durability that can display the presence or absence of an energized state by a color change and that also have excellent light resistance.

[0002]

2. Description of the Related Art In recent years, hot carpets have been widely used for indoor heating in winter because they can be heated from the feet and do not emit combustion gas and are safe. However, since the surface temperature of the hot carpet when heated by energization is relatively lower than that of other heating appliances such as a stove, it is difficult to confirm whether or not the energization is applied, and it is easy to forget to turn off the switch especially when not in use.

As a measure to prevent the user from forgetting to turn off the switch, a hot carpet has been developed which is equipped with a timer so that the switch is automatically turned off after a certain period of time or a voice is generated to notify the presence or absence of electricity. There is. However, this method is extremely inconvenient because it is not possible to always know whether or not electricity is being supplied.

Further, in the case of a hot carpet having a relatively large heating area which exceeds 1 tatami mat, from the viewpoint of energy saving and the like, for example, from full heating to half heating,
In many cases, the heating area can be switched. Then, the user tries to keep warm by touching with his / her hands or feet or looking at the display of the switching device and sitting down at a place where heating is energized.

However, as described above, since the surface temperature of the hot carpet when it is energized is not so high, it is difficult to distinguish between the heated area and the non-heated area, and it is not possible to make an instant judgment. Moreover, the distinction between the heated area and the non-heated area must be confirmed by directly touching the hot carpet with the body, or by going to the heating area display switch usually provided in the corner of the carpet. It is extremely inconvenient. The above inconvenience in the hot carpet is the same in the hot carpet cover used on the hot carpet.

[0006]

SUMMARY OF THE INVENTION Therefore, according to the present invention, whether or not the hot carpet is energized and the energized heating area are clearly and instantly detected without directly touching the hot carpet or its cover or observing the heating area display switch. The purpose of the present invention is to provide a hot carpet and a hot carpet cover that can be clearly known to the user, and can clearly indicate the presence or absence of the energized state and the energized heating area at least during the durable life of the hot carpet or the hot carpet cover. And

[0007]

Means for Solving the Problems As a result of various studies conducted by the present inventors, when a fiber whose color tone reversibly changes with temperature is used as a fiber constituting a surface layer of a hot carpet or a hot carpet cover, It has been found that it is possible to easily and instantly determine whether or not the portion is energized. However, in that case, the reversible thermochromic material is applied to the fiber after spinning by post-processing such as dyeing or impregnation in order to cause the hot carpet or the hot carpet cover to show the temperature change in the discolored state depending on the presence or absence of energization. If the hot carpet or hot carpet cover after it has been adhered or manufactured is coated with a reversible thermochromic material, dyed, embroidered, etc., it may cause friction or bending when using or removing the hot carpet or hot carpet cover. , The reversible thermochromic material easily falls off from hot carpet etc. due to washing etc. and does not have a durable reversible thermochromic display function, and also has poor light resistance and a practical product can be obtained. Turned out not to.

[0008] Therefore, as a result of further research, a microencapsulated reversible thermochromic material was contained as a fiber containing the reversible thermochromic material constituting the hot carpet cover and the surface layer portion of the hot carpet cover. Use of a composite fiber in which a thermoplastic polymer portion to be surrounded by a thermoplastic polymer portion which does not contain the reversible thermochromic material provides a practical product having durable reversible thermochromic display. Found. Moreover, when the above-mentioned composite fiber is used, the reversible thermochromic material is simply attached to the ordinary fiber after spinning by post-processing such as dyeing or impregnation,
Or it has better lightfastness as it is than when a reversible thermochromic material is applied or dyed on a hot carpet or hot carpet cover made from ordinary fibers, and at that time, on the outside of the composite fiber. When a thermoplastic polymer portion of the surrounding portion located in advance contains an ultraviolet absorber in advance or is adsorbed after being made into a fiber, it is possible to obtain light resistance in addition to the above-mentioned durable reversible thermochromic display function. It has been found that a further improved product can be obtained.

Therefore, the present invention has been completed based on the above-mentioned discoveries, and at least a part of the fibers constituting the surface portion of the hot carpet is made of a synthetic fiber containing a reversible thermochromic material. And a synthetic fiber in which the synthetic fiber comprises a thermoplastic polymer portion containing a microencapsulated reversible thermochromic material and a thermoplastic polymer portion completely or partially surrounding the thermoplastic polymer portion. It is a hot carpet characterized by being present. Furthermore,
According to the present invention, at least a part of fibers constituting a surface layer portion of a hot carpet cover is made of synthetic fiber containing a reversible thermochromic material, and the synthetic fiber is a microencapsulated reversible thermochromic material. A hot carpet cover, which is a composite fiber comprising a thermoplastic polymer portion containing a material and a thermoplastic polymer portion completely or partially surrounding the thermoplastic polymer portion. And, the present invention, as a more preferred embodiment thereof, as the above-mentioned composite fiber constituting the hot carpet or the hot carpet cover, a thermoplastic polymer portion which becomes an outer surrounding portion thereof contains a UV absorber in advance, Alternatively, it includes hot carpets and hot carpet covers obtained by using those adsorbed after fiberization.

The hot carpet and hot carpet cover of the present invention may be pile-like ones such as loop piles and cut piles, or knitted fabrics or non-woven fabrics having no piles, as in the conventional ones. .. In the pile form, at least a part of the pile portion coming to the surface is formed from the above-mentioned composite fiber containing a reversible thermochromic material. Further, in a knitted woven fabric or non-woven fabric having no pile, at least a part of the yarn or fiber located on the surface thereof is the above-mentioned composite fiber containing the reversible thermochromic material.

In the present invention, a reversible thermochromic material whose color tone reversibly changes in the heating temperature range of the hot carpet can be used. A reversible thermochromic material is a pigment that develops, discolors, or loses color with changes in temperature, and such changes are reversible. As an example of this, a thermochromic pigment composed of three components of an electron-donating and color-developing organic compound, an electron-accepting compound, and a compound serving as a reaction medium for the both, or a resin solid solution of the three components in the form of fine particles is used. The thermochromic pigments mentioned above can be mentioned.

Such a reversible thermochromic material is disclosed in US Pat. No. 4,028,118 (corresponding Japanese Patent Publication Nos. 44706/76, 44707/76, 447).
08/76 and 44709/76), U.S. Pat. No. 4,732,810 (corresponding Japanese Patent Publication:
29398/89) and U.S. Pat. No. 4,865,64.
No. 8 specification (corresponding Japanese patent publication: 264285/8)
5).

Specific examples of preferable reversible thermochromic materials are as follows. As the electron-donating color organic compound,
Diaryl phthalides, indolyl phthalides, polyaryl carbinols, leuco auramines, acyl auramines, aryl auramines, rhodamine B
At least one selected from lactams, indolines, spiropyrans, fluorans and the like is preferable. Also,
Examples of the electron-accepting compound include mono- or polyphenol compounds, metal salts of phenol compounds, aromatic carboxylic acids, aliphatic carboxylic acids, metal salts of carboxylic acids, acidic phosphoric acid esters, metal salts of acidic phosphoric acid esters, triazoles. At least one selected from compounds is preferable. Further, the reaction medium is preferably at least one selected from alcohols, esters, ketones, ethers, amides and the like.

Of the above-mentioned reversible thermochromic materials, the normal heating temperature range for hot carpets or hot carpet covers (30-50 ° C for the former, 20 for the latter).
It is particularly preferable to appropriately select and combine those capable of exhibiting a sharp color change at -30 ° C.

When the above-mentioned reversible thermochromic material is pigmented, the reversible thermochromic material is encapsulated in a microcapsule by a known microencapsulation technique. It is possible to obtain a composite fiber having good temperature-sensitive discoloration property by eliminating the deterioration of the discoloration material.

The microencapsulated reversible thermochromic material has a particle size of 1 to 30 μm, preferably 2 to 2
Those of 0 μm are advantageous. Examples of the microencapsulation technology include interfacial polymerization method, in-situ polymerization method, in-liquid curing coating method, phase separation method from aqueous solution, phase separation method from organic solvent, melt dispersion cooling method, in air Suspension coating method,
A spray drying method and the like can be mentioned, and an appropriate selection can be adopted from these methods.

In the hot carpet or the hot carpet cover of the present invention, the reversible thermochromic material contained in the synthetic fibers constituting the surface layer portion is detached from the fibers by damage due to external force such as friction or bending or washing. , A thermoplastic polymer portion containing a microencapsulated reversible thermochromic material as the synthetic fiber in order to prevent the removal and improve the light resistance (hereinafter referred to as “thermoplastic polymer (a ) ”) Is transparent or translucent, heat-resistant, and transparent, in which the color change of the reversible thermochromic material contained in the thermoplastic polymer (a) can be seen from the outside of the composite fiber. A composite fiber coated with a protective layer of another thermoplastic polymer having high strength (hereinafter referred to as "thermoplastic polymer (b)") is used.

In this case, the protective layer of the thermoplastic polymer (b) is required to completely (360 degrees) surround the periphery of the thermoplastic polymer (a) as seen in the cross section of the composite fiber. Alternatively, a part of the thermoplastic polymer (a) may be exposed on the fiber surface. However, it is preferable that the entire circumference of the thermoplastic polymer (a) is surrounded by the protective layer of the thermoplastic polymer (b).
Further, in the conjugate fiber, it is preferable that the thermoplastic polymer (b) accounts for 20 to 95% by weight of the conjugate fiber.

An example of the above-mentioned conjugate fiber used in the present invention is shown in a cross-sectional view of the fiber. The core portion made of the thermoplastic polymer (a) is surrounded by the sheath portion made of the thermoplastic polymer (b). The core-sheath type composite fiber as shown in FIG. 1 and the sea-island type composite fiber as shown in FIG. 2 in which the island portion made of the thermoplastic polymer (a) exists in the sea portion made of the thermoplastic polymer (b). , A composite fiber in which the thermoplastic polymer (a) and the thermoplastic polymer (b) are alternately arranged in a triple structure from the center, as shown in FIG. 3, and the thermoplastic polymer (a) is partially the surface of the composite fiber Exposed to Figure 4
Examples of such composite fibers are shown in FIG. However, the conjugate fiber used in the present invention is not limited to those shown in FIGS. 1 to 4, and the reversible thermochromic material contained in the thermoplastic polymer (a) is the same as that of the thermoplastic polymer (b). Any form may be used as long as it can be protected by the protective layer.

The type of the thermoplastic polymer (a) in the composite fiber is not particularly limited, but the reversible thermochromic material is generally weak to high temperature and easily decomposed by heat during melt spinning of the fiber.
Melting point or softening point is 230 ° C or lower, especially 120 to 200
A thermoplastic polymer at ℃ is preferable, for example, polyolefin such as high density polyethylene, medium density polyethylene, low density polyethylene, polypropylene, modified polyethylene, modified polypropylene, nylon 12, nylon 11, nylon 6, polyamide such as nylon elastomer, poly Examples include polyesters such as butylene terephthalate and polyhexamethylene terephthalate. These thermoplastic polymers (a) may be homopolymers or copolymers, and may be used alone or in combination of two or more.

The microencapsulated reverse thermochromic material is added to the above-mentioned thermoplastic polymer (a) in an amount of 0.5 to 90% by weight, preferably 1 to 70% by weight.
It is advisable to produce the synthetic fiber by including it in a weight percentage.

The thermoplastic polymer (b) constituting the surface protective layer of the composite fiber is a crystalline polymer having excellent fiber-forming properties, for example, 60 mol% or more of repeating units are ethylene terephthalate and butylene. Polyesters composed of alkylene terephthalates such as terephthalate and hexamethylene terephthalate are preferable, and the polyesters are aromatic compounds such as isophthalic acid, terephthalic acid, isophthalic acid having a metal sulfonate group, naphthalene-2,6-dicarboxylic acid, etc. Dicarboxylic acid,
Adipic acid, sebacic acid and other aliphatic dicarboxylic acids, diethylene glycol, butanediol, hexanediol, neopentyl glycol, cyclohexanedimethanol, polyethylene glycol, polytetramethylene glycol, even if it contains a small amount of copolymerized diol components such as bisphenol Good. Also, nylon 6 and nylon 6
6, nylon 12 and the like can also be used as the thermoplastic polymer (b). As the thermoplastic polymer (b), 6
0 mol% or more consists of butylene terephthalate units,
It is preferable to use a polymer in which a small amount of isophthalic acid is copolymerized.

Further, the thickness and cross-sectional shape of the synthetic fiber containing the reversible thermochromic material are not particularly limited, and the same as those used for producing a conventional hot carpet or hot carpet cover can be used. You can

Further, when the thermoplastic polymer (b) portion of the above-mentioned composite fiber constituting the hot carpet or the hot carpet cover is made to contain an ultraviolet absorber in advance or is adsorbed after being made into a fiber, a fiber is formed. Any of the UV absorbers conventionally used for water-soluble thermoplastic polymers can be used, and it is preferable to select and use a more suitable one for each thermoplastic polymer.

In the present invention, the surface of the hot carpet or the hot carpet cover is obtained by using all the fibers constituting the surface layer of the hot carpet or the hot carpet cover as the above-mentioned composite fiber containing the reversible thermochromic material. A hot carpet or a hot carpet cover, which has a thermosensitive reversible discoloration throughout the entire area or a composite fiber containing the reversible thermochromic material as a part of the fibers constituting the surface layer of the hot carpet or hot carpet cover. Only a part of the above may be thermosensitive reversible discoloration.

However, if the entire surface of the hot carpet or the hot carpet cover is made of the composite fiber containing the reversible thermochromic material, the color tone itself of the reversible thermochromic material is largely restrained, and the hot carpet or the like. Since it is difficult to express colors and patterns freely, it tends to be a monotonous product, and because the reversible thermochromic material is relatively expensive, a hot carpet that uses a large amount of composite fibers containing it. The price is likely to be high. Therefore, by using the above-described composite fiber containing a reversible thermochromic material as a part of the fiber constituting the surface portion of the hot carpet or the hot carpet cover, only a part of the surface thereof is subjected to the thermosensitive reversible color change. It is desirable to do.

At this time, in the hot carpet or hot carpet cover in which the energization heating area is not switched, for example, as shown in FIGS. 5 to 7, the hot carpet is prepared by using the composite fiber containing the reversible thermochromic material. Or a part of the hot carpet cover 1 or the entire surface of the character 2 or pattern 3
Is preferably formed, and the presence or absence of electric heating is preferably displayed by the reversible color change of the color tone of the character 2 or the pattern 3.

Further, as described above, in many hot carpets, the energization heating area can be switched to a plurality of points from the viewpoint of power saving and the like, but such a heating area is switched. In the hot carpet and the hot carpet cover used therefor, at least one surface layer portion formed from a composite fiber containing a reversible thermochromic material is provided in each heating area so that the electric heating area can be clearly distinguished. is necessary.

The above points will be described with reference to FIG. 8 as an example.
In the hot carpet of FIG. 8, the heating area is 4 of A to D.
It is divided into two, A + B + C + D (entire surface heating),
A + B (half-side heating), C + D (half-side heating), A (1
/ 4 surface heating), B (1/4 surface heating), C (1/4 surface heating) and D (1/4 surface heating) can be switched among seven heating areas by the changeover switch 4. ..

In the hot carpet of FIG. 8, if a temperature-sensitive reversible discoloration display is provided by a synthetic fiber containing a reversible thermochromic material only in the area A, for example, even if the display portion is discolored by heating, It is not possible to determine whether or not the energized heating state is one of the above. On the other hand, when discoloration does not occur in the area A, it is not possible to determine whether the entire surface of the hot carpet is not heated or the energized heating state of and, and the reversible discoloration display is displayed in the area A. However, even if it is provided in the above, it is not possible to properly display the electric heating state.

On the other hand, by providing at least one temperature-sensitive reversible color change display portion in each of the areas A to D, it is possible to clearly determine which one of the above-mentioned heating energization states. That is, in a hot carpet in which a plurality of energization heating zones can be switched, the temperature-sensitive reversible color change display portion 3 is displayed, for example, in FIG.
As shown in Fig. 8, continuous or intermittent patterns or characters distributed in all heating zones (in Fig. 8, continuous striped pattern 3
Corresponds to the temperature-sensitive reversible color change display part, and the intermittent star pattern 3 in FIG. 7 corresponds to the temperature-sensitive reversible color change display part). The areas A to D can be accurately and extremely easily discriminated.

Further, regarding the hot carpet cover to be used by covering it with the hot carpet, in the hot carpet cover, for example, after washing, the upper and lower sides or the right and left sides of the hot carpet cover are often used in a state different from the front. .. In many cases, one hot carpet cover is manufactured so that one hot carpet cover can be commonly used for various hot carpets having the same size but different heating switching systems. Therefore, in the hot carpet cover, if a temperature-sensitive reversible discoloration display portion is provided in accordance with only one type of hot carpet heating switching method, for example, when washing or the like, the hot carpet heating switching method is applied to the position to be covered. It takes time and effort to match
Another problem is that the hot reversal type hot carpet cannot be used because the position of the temperature-sensitive reversible discoloration display portion for displaying electric heating is displaced.

Therefore, in the case where the temperature-sensitive reversible color change display portion is partially provided by the composite fiber containing the reversible thermochromic material, the hot carpet cover shown in FIG. 9 is taken into consideration, for example. As shown in FIG. 5 or as shown in FIG. 8 described above, the temperature-sensitive reversible color change display portion 3 is preferably provided in a continuous or intermittent pattern or character pattern distributed in all heating regions. By doing so, the hot carpet cover can be commonly used for various hot carpets, and even when the hot carpet is covered differently, the electric heating state of each heating zone can be clearly displayed.

In the hot carpet and the hot carpet cover of the present invention, as the composite fibers containing the reversible thermochromic material, those having different discoloration temperatures or different color tones when discolored are used in combination. In that case, the surface temperature of the hot carpet or the hot carpet cover can be displayed at a plurality of temperature stages, and a product with a rich decorative effect can be provided. Further, in the hot carpet of the present invention,
The basic structure and function of the hot carpet such as the heating energization method and the heating area switching method are not limited at all, and conventionally known methods can be adopted. Hereinafter, the present invention will be specifically described with reference to Examples, but the present invention is not limited thereto.

[0034]

【Example】

Example 1 A thermochromic material composed of crystal violet lactone, bisphenol A and undecyl myristate is microencapsulated by an epoxy resin / amine interfacial polymerization method to produce microcapsules of thermochromic material having an average particle diameter of 7 μm. did. Next, 100 parts by weight of this microcapsule (water content 40%) and 50 parts of Chemipearl M-200 (manufactured by Mitsui Petrochemical Industry Co., Ltd .; polyolefin dispersion; solid content 40%) are mixed and dried to form a processed pigment. (Microcapsules) were prepared. Isophthalic acid 3
5 mol% modified polybutylene terephthalate (melting point 168
(86 ° C.) and 86 parts by weight of chips at 195 ° C. were melt-mixed, and particles having a size of 15 μm or more were removed by a filter to obtain chips [chip (a)] mixed with a thermochromic material.

Next, the chips (a) obtained above and the polybutylene terephthalate modified with 30 mol% of isophthalic acid (melting point 177 ° C.) [chips (b)] are melted in separate extruders, and a general-purpose composite spinning apparatus is melted. Using the above, the composite ratio of chip (a): chip (b) was set to 50:50 by weight, and the product was spun from the spinneret at 200 ° C. and wound at a spinning speed of 800 m / min to form a part comprising the chip (a). To form a core portion, and a portion composed of the tip (b) constitutes a sheath portion to obtain a spun raw yarn of the core-sheath type composite fiber shown in FIG. Next, the spun raw yarn is drawn at a draw ratio of 2.5 and heat set at 140 ° C. to
A drawn yarn having a temperature-sensitive reversible discoloration of 00d / 10f was obtained.

The drawn yarn (100d / 10f) 3 obtained above
One book and one regular polyethylene terephthalate filament yarn (1500d / 150f) were erected on a creel stand, and these four yarns were passed through an interlace nozzle to obtain a 1800d / 180f pile yarn. Using this as a pattern thread for the temperature-sensitive reversible color change display part,
1800d / 180f dyed blue as a plain thread
Using the regular polyethylene terephthalate filament yarn of the above, a loop pile-like hot carpet (5/32 gauge, radial driving 3 stitches / c) shown in FIG.
m) was prepared by a conventional method.

When the hot carpet obtained above was energized, when the surface temperature of the hot carpet was in a heated state of about 32 ° C. or more, the character display “currently energized” appeared on the carpet in a clear white state. On the other hand, when the energization was stopped, when the surface temperature of the hot carpet became about 20 ° C. or lower, the color became almost the same as the background color of the carpet, blue, and the word “energizing” disappeared. From this, it can be seen that the hot carpet of the present invention can be easily and clearly discerned visually by the color display of the temperature-sensitive reversible discoloration portion.

[0038]

According to the hot carpet or hot carpet cover of the present invention, the presence or absence of energization and the energized heating area can be determined without touching the hot carpet or the hot carpet cover directly for inspection or looking at the heating area display switch. Due to the temperature-sensitive reversible color change action of the fiber containing the reversible thermochromic material located in the surface layer portion, it is possible to accurately and instantaneously discriminate visually.

In the hot carpet and hot carpet cover of the present invention, since the thermosensitive color-changing fiber produced by using the microencapsulated reversible thermochromic material forms the thermosensitive color-changing portion, There is no alteration of the reversible thermochromic material during the production of the fiber, and a highly sensitive and clear temperature-sensitive color-changing action can be exhibited.

Further, in the hot carpet and the hot carpet cover of the present invention, the thermoplastic polymer (a) containing the reversible thermochromic material is surrounded by a protective layer of another thermoplastic polymer (b). Hot carpets and hot carpets are made using bicomponent fibers to form the temperature sensitive tarnish and the reversible thermochromic material is either bare or barely exposed on the fiber surface. Friction and bending when using or removing the cover,
The reversible thermochromic material is not dropped or removed from the fiber by washing or the like and is retained in the fiber in a stable state for a long period of time. As a result, the durability of the temperature-sensitive reversible color change display on the hot carpet or hot carpet cover becomes extremely excellent, and it is possible to perform clear temperature-sensitive reversible color change display over a long period of time and is also excellent in light resistance. ing.

Further, in the present invention, as the composite fiber constituting the hot carpet and the hot carpet cover, an ultraviolet absorber is contained in advance in the thermoplastic polymer portion serving as the surface protective layer, or is adsorbed after fiberizing. If the above is used, a hot carpet and a hot carpet cover having further improved light resistance can be obtained.

[Brief description of drawings]

FIG. 1 is a view showing an example of a cross section of a composite fiber used in a hot carpet or a hot carpet cover of the present invention.

FIG. 2 is a view showing another example of the cross section of the composite fiber used in the hot carpet or hot carpet cover of the present invention.

FIG. 3 is a view showing still another example of the cross section of the composite fiber used in the hot carpet or hot carpet cover of the present invention.

FIG. 4 is a view showing still another example of the cross section of the composite fiber used in the hot carpet or the hot carpet cover of the present invention.

FIG. 5 is a diagram showing an example of the hot carpet of the present invention that does not have a mechanism for switching the electric heating area.

FIG. 6 is a diagram showing another example of the hot carpet of the present invention which does not have a mechanism for switching the electric heating area.

FIG. 7 is a view showing still another example of the hot carpet of the present invention which does not have a mechanism for switching the electric heating area.

FIG. 8 is a diagram showing an example of the hot carpet of the present invention having a mechanism for switching the electric heating area.

FIG. 9 is a diagram showing an example of a hot carpet cover of the present invention.

[Explanation of symbols]

1 Hot carpet 2 Thermosensitive reversible discoloration display part made of letter-shaped reversible thermochromic material-containing synthetic fiber 3 Thermosensitive reversible discoloration display part made of pattern-shaped reversible thermochromic material-containing synthetic fiber 4 Switching of heating zone Switch 5 hot carpet cover

Claims (5)

[Claims] 1. A reversible thermochromic property in which at least a part of fibers constituting a surface layer portion of a hot carpet is a synthetic fiber containing a reversible thermochromic material, and the synthetic fiber is microencapsulated. A hot carpet, which is a composite fiber comprising a thermoplastic polymer portion containing a material and a thermoplastic polymer portion completely or partially surrounding the thermoplastic polymer portion. 2. The heating zones are switchable, and each heating zone has at least one surface layer portion formed from the above-mentioned composite fiber containing a reversible thermochromic material. Hot carpet. 3. The above-mentioned composite fiber constituting the hot carpet contains an ultraviolet absorber in or adsorbed to the above-mentioned thermoplastic polymer portion surrounding the thermoplastic polymer portion containing the reversible thermochromic material. It is a composite fiber.
Or 2 hot carpets. 4. A reversible thermochromic material in which at least some of the fibers constituting the surface layer of the hot carpet cover are synthetic fibers containing a reversible thermochromic material, and the synthetic fibers are microencapsulated. A hot carpet cover, which is a composite fiber comprising a thermoplastic polymer portion containing a conductive material and a thermoplastic polymer portion completely or partially surrounding the thermoplastic polymer portion. 5. The composite fiber constituting the hot carpet cover is made to contain or adsorb an ultraviolet absorber to the thermoplastic polymer portion surrounding the thermoplastic polymer portion containing a reversible thermochromic material. The hot carpet cover of claim 4, which is a composite fiber.