JP2013165792A - Carpet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a carpet easy to remove stain on the carpet by cleaning, and making dirt on the carpet inconspicuous.SOLUTION: A carpet is configured such that a twisted yarn having a thickness of 1,600 denier or more and 3,500 denier or less, is braided or woven upward at a density of 64 yarns or more and 150 yarns or less per 6.45x10m. The twisted yarn is obtained by twisting a filament made of a fiber having a moisture content of 0.5% or less, measured based on JIS L 0105, and the filament has a thickness of 5 denier or more and 200 denier or less.

Description

  The present invention relates to a carpet, and more particularly, to a carpet which uses a thin filament made of a specific material, makes it easy to remove dirt by increasing the density of the twisted yarn, etc., and makes the dirt inconspicuous.

The carpet is laid on a corridor or floor of a room, in a vehicle such as an automobile, etc., and gives a sound-deadening effect, a heat-retaining effect, ease of walking, ease of fatigue, comfort, luxury, etc. to a person on the carpet.
However, when food or drink falls on it, the dirt is easily noticeable, and the dirt is difficult to remove and often remains as a stain. In particular, if the dirt is left as it is for a long time, it is often impossible to remove the dirt using any detergent, cleaning device, removal method or the like.

  In particular, in service locations such as hotels, inns, restaurants, etc., it generally takes time for food and beverages etc. to fall on the carpet before employees notice it, and when it is noticed, remove the dirt. This is often very difficult. And once the dirt becomes a stain and remains on the carpet, it is filthy and degrading, so there is a problem that it is necessary to replace all the carpet over a wide range and it costs high .

  As a technique for easily removing dirt on the carpet against such problems, a method of performing a specific treatment on the surface of the carpet pile (Patent Documents 1, 2, 3, 5), a carpet pile (Patent Documents 2 and 6), a method of specifying the structure of the fibers constituting the carpet pile (Patent Document 4), and a cross section of the fibers having a specific shape In addition, methods for combining specific surface treatments and specific pile physical properties (Patent Documents 3 and 7) are known.

However, these methods make the soil difficult to adhere (improves the antifouling property) by subjecting the pile or the like to chemical treatment or making the pile a specific physical property. Not easy enough.
In particular, a large amount of colored food and drink fell on the carpet and was completely insufficient for removing stains that had been left for a long time.

  In addition, the known techniques mainly focus on improving the antifouling property of the pile, and there are few known techniques for making the stains on the carpet inconspicuous or invisible.

  The demand for extending the carpet replacement period (maintenance of the surface cleanliness) is increasing, but the above-mentioned known technology is insufficient in terms of both the ease of removing dirt and the conspicuousness of dirt. Therefore, further improvement has been desired.

Japanese Patent Application Laid-Open No. 6-022840 JP-A-7-258958 Japanese Patent Laid-Open No. 9-067774 Japanese Patent Laid-Open No. 10-273739 JP 2003-265301 A JP 2005-023495 A JP 2000-096375 A

  The present invention has been made in view of the above-described background art, and a problem thereof is to provide a carpet that can easily remove stains on the carpet by cleaning. The object is to provide an inconspicuous carpet even before cleaning.

  As a result of intensive studies to solve the above-mentioned problems, the present inventor limited each filament of the twisted yarn forming the pile to a specific range of thickness, and specified the filament fibers. By limiting the density of the twisted yarn at the time of carpet manufacture to a specific range and increasing the density of each filament on the carpet, etc., it is easy to remove dirt, In addition, the inventors have found that dirt can be made inconspicuous and have completed the present invention.

That is, in the present invention, one yarn having a thickness of 1600 denier or more and 3500 denier or less is pierced upward at a density of 64 or more and 150 or less per 6.45 × 10 ⁻⁴ m ² . Or a woven carpet, in which the twisted yarn is formed by twisting a filament composed of fibers having a moisture content of 0.5% or less measured according to JIS L 0105, and the filament The carpet has a thickness of 5 denier or more and 200 denier or less.

Further, the present invention is a filament made of fibers having a moisture content of 0.5% or less measured according to JIS L 0105, twisted from 5 denier to 200 denier, and having a thickness of 1600 denier to 3500. The present invention provides a method for producing a carpet, characterized in that a twisted yarn of denier or less is stabbed into or woven into a base fabric at a density of 64 or more and 150 or less per 6.45 × 10 ⁻⁴ m ² .

ADVANTAGE OF THE INVENTION According to this invention, the said problem and subject can be solved, and the carpet which can remove dirt easily by cleaning can be provided.
In particular, it is possible to provide a carpet that can be easily cleaned by ordinary cleaning even when a stain-causing substance such as food or drink falls on the carpet.
Further, even if the carpet is left unattended for a long time and cleaned after a long time has passed, the carpet can be easily cleaned by normal cleaning.

In addition, when the stain cause falls on the carpet, it is possible to provide a carpet in which the stain on the carpet is difficult to visually confirm even before cleaning, that is, before removal of the stain cause.
In particular, when the stain causing substance is a colored liquid having a low viscosity such as coffee, tea, juice, cola, etc., the stain causing substance can be easily placed under the pile (hair foot) without cleaning. By moving or the like, it is possible to provide a carpet in which dirt is not noticeable only when viewed from above the carpet.

  Further, in the case where the above-mentioned stain cause is a substance having a high color density or a high viscosity, the stain cause solidified on the carpet surface is easily removed by ordinary cleaning, and further comprises a cleaning solution used for cleaning. Since the “liquid in which the contaminants are diluted” also easily moves below the pile, it is possible to provide a carpet that can make surface contamination inconspicuous by cleaning.

  The carpet of the present invention is particularly effective in service places such as hotels, inns, restaurants, etc., in which it often takes a long time after the cause of contamination falls on the carpet to be discovered. In addition, the present invention is particularly effective in the service place where it is only necessary to make the stain cause inconspicuous. In addition, the present invention is particularly effective in the service place where the stains are made inconspicuous even by using a commercial cleaning device dedicated to carpets.

It is a photograph of the evaluation example 2 in which a stain cause is placed on the carpet 01 of the example 1 and before the cleaning 15 days after the evaluation example 1, and is also visually observed before the cleaning. It is the photograph after putting a dirt cause thing on carpet 01 of Example 1, and cleaning according to evaluation example 15 after 15 days. It is also a photograph of the evaluation example 2 in which a stain cause is placed on the carpet 02 of the comparative example 1 and before the cleaning 15 days after the evaluation example 1, and is also visually observed before the cleaning. It is the photograph after putting a dirt cause thing on carpet 02 of comparative example 1, and cleaning it according to evaluation example 15 after 15 days.

  Hereinafter, the present invention will be described, but the present invention is not limited to the following specific embodiments, and can be arbitrarily modified within the scope of the technical idea.

The present invention
A single yarn having a thickness of 1600 denier or more and 3500 denier or less is directed upward at a density of 64 or more and 150 or less per 6.45 × 10 ⁻⁴ m ² , that is, per square inch. Embedded or woven carpet,
The twisted yarn is formed by twisting a filament composed of fibers having a moisture content of 0.5% or less measured according to JIS L 0105,
The carpet is characterized in that the thickness of one filament is not less than 5 denier and not more than 200 denier.

  The carpet of the present invention is manufactured by piercing, planting, and weaving twisted yarn having a thickness of 1600 denier to 3500 denier upward at a density of 64 to 150 per square inch. Is.

  The thickness of the twisted yarn must be 1600 denier or more and 3500 denier or less, preferably 18000 denier or more and 3300 denier or less, more preferably 2000 denier or more and 3100 denier or less, and particularly preferably 2200 denier or more and 2900 denier or less.

If the thickness of one twisted yarn is too thick, it may be difficult to produce even a tuft carpet or a woven carpet, which will be described later. In the case of a twisted yarn of a filament whose thickness exceeds 100 denier, In particular, the capillary diameter in the capillary phenomenon may be too large to play a role.
On the other hand, if the thickness of one twisted yarn is too thin, the spacing between the twisted yarns opens, so the spacing between the filaments constituting the twisted yarn also opens, and as a result, the twisted yarns or the filaments constituting the twisted yarn cause liquid contamination. As a result, the effect of the present invention in which dirt becomes inconspicuous from above the carpet may not be exhibited before and after cleaning, particularly before cleaning. In addition, the pile (hairy feet) may fall down.

  The type of the carpet of the present invention is not particularly limited, and even a tuft carpet manufactured by piercing or planting a twisted yarn in a base fabric is manufactured by weaving a twisted yarn into what is formed of weft yarns and warp yarns. A carpet may be used. Further, the woven carpet may be Wilton or Akisminster, and the Wilton may be single Wilton or Wilton double-face.

  The type of the carpet of the present invention may be a loop carpet or a cut carpet. However, the carpet is a cut carpet because the effects of the present invention are easily exerted, particularly in terms of easy removal of dirt, difficulty in seeing dirt, and the like. Is preferred. Although the principle is not limited, it is considered that a cut carpet is more advantageous for producing a capillary phenomenon.

The length of the hair feet (pile) is not particularly limited, but in the case of a loop carpet, 3 to 10 mm is preferable, 4 to 9 mm is more preferable, and 5 to 8 mm is particularly preferable. In the case of a cut carpet, 5 to 12 mm is preferable, 6 to 11 mm is more preferable, and 7 to 10 mm is particularly preferable.
If the length of the pile (pile) is too short, it can be seen from the top of the carpet due to low-viscosity liquid-causing substances, or the cleaning fluid diluted with dirt-causing substances moving below the pile. In some cases, the effect of the present invention in which dirt is not noticeable is not achieved.
On the other hand, if it is too long, it may be difficult to walk or it may be costly.

The carpet of the present invention may or may not have a backing at the bottom. Even if there is no backing, liquid stains and colored cleaning liquid move to the bottom of the carpet, making it difficult to see the dirt. The dirt is more difficult to see from above the carpet.
When the backing exists, the type is not particularly limited, and may be a woven fabric or a non-woven fabric. Further, although the material is not limited, hemp is particularly preferable because of its high liquid absorbency.
In the present invention, the backing may or may not be present, but the hemp backing is particularly preferable because the liquid that has moved by capillary action is absorbed in the lower part of the carpet, making it more difficult to see dirt. .

The “twisted yarn” in the present invention includes extremely strong twisted yarn, strong twisted yarn, medium twisted yarn, sweet twisted yarn, untwisted yarn, and set yarn and non-set yarn.
If the twist is too strong, the filaments are twisted and twisted, and the portion corresponding to the capillary in the capillary phenomenon is twisted, and the effect of the present invention may be diminished. Therefore, it is preferably not twisted, and particularly preferably a twisted yarn produced by an intermingle manufacturing method. In the present invention, it is preferable to make the filaments as parallel as possible, and therefore, a non-set yarn is more preferable.
The “intermingle manufacturing method” is a method of manufacturing yarn by entanglement with air without applying twist to the filament.

In the present invention, a yarn in which a filament is false-twisted may be used, and several such yarns may be aligned to form a “twisted yarn”. That is, the “twisted yarn” in the present invention includes a filament or a filament in which several filaments are falsely twisted.
For example, a “twisted yarn” in which filaments of 5 denier to 200 denier are arranged into 3 to 30 yarns and twisted with 2 to 6 filaments is advantageous in terms of cost, Since it is easy to process, it is preferably used.
The “twisted yarn” in the present invention includes multifilament yarns and those obtained by arranging several multifilament yarns.

In the carpet of the present invention, the twisted yarn is pierced upward at a density of 64 or more and 150 or less per 6.45 × 10 ⁻⁴ m ² (that is, per square inch). It is essential that it is or is interwoven. That is, the carpet of the present invention must have 64 grains (dots) / inch ^{2 to} 150 grains (dots) / inch ² .

The density of the twisted yarn per 6.45 × 10 ⁻⁴ m ² (per square inch), preferably 74 or more and 144 or less, more preferably 81 or more and 134 or less, and particularly preferably 97 or more and 130 or less. .
If the density of the twisted yarn is too small, the distance between the twisted yarns will be widened, so that the distance between the filaments constituting the twisted yarn will also be widened, and it will be difficult for the capillary phenomenon to occur when the stain source is liquid. In some cases, the effect of the present invention is not exhibited.
On the other hand, if the density of the twisted yarn is too high, it may be difficult to manufacture.

  When the carpet of the present invention is a tufted carpet, it is manufactured by inserting a twisted yarn into the base fabric at the above density, and when the carpet of the present invention is a woven carpet, it is manufactured by weaving the twisted yarn at the above density.

The twisting is, the transverse direction (Gauge), 15 present below 2.54 × ^{10 -2} m per (per inch) 8 or more, and, in the longitudinal direction ^{(Stech), 2.54 × 10 -2} m It is preferable that the number of hits (per inch) is 8 or more and 15 or less.
In both the horizontal and vertical directions, it is 2.54 × 10 ⁻² m (per inch), more preferably 9 to 13, and particularly preferably 10 to 12.
If the amount is too small in both the horizontal direction and the vertical direction, the density may be the same as when the density is too small, whereas if the density is too large, the density may be the same as when the density is too high.

In the carpet of the present invention, it is essential that the twisted yarn is obtained from a filament made of fibers having a moisture content measured based on JIS L 0105 of 0.5% or less. According to JIS L 0105, the preliminary drying is performed at 50 ° C. for 1 hour and the absolute drying temperature is 105 ° C.
“JIS L 0105” is a general rule of physical test methods for textile products, which was revised in 2006 and confirmed in 2010.

The moisture content is essential to be 0.5% or less, preferably 0.4% or less, more preferably 0.2% or less, and particularly preferably 0.0%.
Further, the filament is preferably made of a fiber having an “official moisture content” defined in JIS L 0105 within the above range.
When composed of two or more types of fibers, the moisture content of the entire “two or more types of fibers” is employed. When the official moisture content is composed of two or more kinds of fibers, an arithmetic average weighted by the mixture ratio of the official moisture content of each fiber is adopted.

If the moisture content or the official moisture content is too high, it is difficult to remove dirt even by cleaning, and it becomes visible as a spot. Further, even a liquid with low viscosity and light color does not become invisible before cleaning if it falls on the carpet.
On the other hand, if the moisture content or the official moisture content is in the above range, it is easy to remove dirt that has been left for a long time by cleaning, and the cause of dirt is the viscosity of coffee, juice, tea, wine, cola, etc. If it is a low liquid, even if it is not cleaned, the liquid can be easily moved below the pile, so that the dirt cannot be seen only by looking from the carpet.

  The filament in the present invention is preferably made of a chemical fiber rather than a natural fiber. In the first place, there are almost no natural fibers having a moisture content of 0.5% or less, and natural fibers may not provide the above-described effects of the present invention.

  Specific examples of fibers having a moisture content of 0.5% or less include polyester fibers such as polyethylene terephthalate and polylactic acid; polyolefin fibers such as polyethylene and polypropylene; vinyl fibers such as polyvinyl chloride; glass fibers, Inorganic fibers such as metal fibers; carbon fibers and the like.

Easy to remove dirt, easy to see dirt, color (colorless), colorability (easy to color, including blending with resin before spinning), feel when carpeted, chemical resistance, In view of wear resistance, weather resistance, and the like, the material of the fiber is preferably polyester, polyethylene, or polypropylene.
“Polyethylene or polypropylene” may contain some copolymerization components within a range in which the moisture content is maintained at 0.5% or less, and may be a copolymer of polyethylene and polypropylene, with an average molecular weight and molecular weight distribution. The crystallinity, crystal structure, etc. are not particularly limited, and can be determined from suitability for carpets.

Polyolefins such as polypropylene are mostly used as the fibers of needle punched carpets for carpets. "Needle punch carpet" is a non-woven carpet made by stacking short fibers, compressed and stabbed by a machine with a large number of needles (needles), without using filaments and without piles (hairy feet) In these respects, the embodiment is completely different from the carpet of the present invention.
Polyolefins such as polyethylene and polypropylene are not usually used for carpets using filaments (long fibers) in the form of the present invention.

  The above-mentioned “polyester” is not particularly limited as long as the moisture content is maintained at 0.5% or less, but the condensate of terephthalic acid and ethylene glycol (polyethylene terephthalate (PET)) is not limited. Particularly preferred from the viewpoint of versatility. As long as the moisture content is maintained at 0.5% or less, some cocondensation components may be included, and the average molecular weight, molecular weight distribution, crystallinity, crystal structure, etc. are not particularly limited. It is determined from the suitability of the.

  The carpet pile of the present invention is a filament (long fiber) and not a staple (short fiber). Even for chemical fibers such as polyester, polyethylene, and polypropylene, those that are cut into staples and then spun into spun yarns produce the capillarity as a carpet when grown at the preferred density described above. The dirt causing the low viscosity liquid and the cleaning liquid diluted with the dirt are difficult to move from the top to the bottom of the pile (hair feet). In some cases, the effect of the present invention is not achieved. Also, dirt is difficult to remove by cleaning, and if left unattended for a long time, it becomes even more difficult to remove.

The carpet of the present invention is manufactured by inserting a twisted yarn into a base fabric, or by weaving a twisted yarn into a product formed of a weft and a warp, and the filament constituting the twisted yarn has a thickness of one. It is essential that it is 5 denier or more and 200 denier or less.
It is preferably 10 denier or more and 100 denier or less, more preferably 12 denier or more and 70 denier or less, and particularly preferably 15 denier or more and 30 denier or less.

If the thickness of one filament is too thin, durability and abrasion resistance when used as a carpet may be inferior, and piles (hair feet) may fall.
On the other hand, if it is too thick, the contact area between the filaments becomes small, and it is difficult for capillary action to occur, and as a result, the low-viscosity liquid stains and the cleaning liquid diluted with stains move down the pile. In some cases, the effect of the present invention is not achieved because the dirt is not noticeable only when viewed from above the carpet. In addition, if the thickness of one filament is too thick, it may be difficult to manufacture the carpet or the touch may be poor.

  In the carpet of the present invention, it is preferable that the filament fiber constituting the carpet is an original yarn obtained by spinning a material containing a colorant. The “original yarn” is a “raw solution colored fiber”, which is a fiber made by melt spinning a resin containing a colorant before the spinning process. A colorant is contained in the filament, which is to be contrasted with “post-dying”, in which a colorless filament is colored later.

  The method for producing the original yarn is not particularly limited. For example, a master chip in which a colorant is previously dispersed in a resin and a base chip that is a non-colored resin for diluting the master chip are melted. A method of mixing at a predetermined ratio in the stage of the previous chip and then melt spinning the mixed chip is preferable.

In the case of the original yarn, because the pigment is contained in the fiber, it is difficult for the contaminants to enter the fiber, and it is difficult to find traces of stains (stains, etc.) not only after cleaning but also before cleaning. Therefore, the above-mentioned effect and synergistic effect of the present invention are recognized.
Furthermore, the carpet of the present invention is particularly effective when it is possible to remove dirt or make it difficult to see by using a commercial cleaner device or a dedicated detergent. Therefore, a synergistic effect is exhibited particularly in the case of a carpet in which the colorant is contained even inside the filament and the color does not fade by any cleaning method.
In addition, the original yarn is excellent in weather fastness, cleaning fastness, chemical resistance, and the like.

As described above, the “twisted yarn” in the present invention includes a filament or a yarn obtained by falsely twisting a filament, and includes a multifilament yarn or a multifilament yarn. However, in order to suitably cause the capillary phenomenon, it is preferable that each filament is separated when it is made into a carpet and grows straight upward.
Accordingly, it is preferable that the monofilament is twisted or aligned to be “twisted yarn” rather than twisted or aligned to be “twisted yarn”.

  From crimped yarns with crimps, and design yarns with decorative appearance such as thickness changes, loop or knot changes, color combinations, etc. Less yarn, twisted yarn by intermingle manufacturing method, or non-heat-set yarn that does not add decorative appearance favorably causes capillary phenomenon, and as a result, it becomes difficult to see the cause of contamination of liquid with low viscosity, In addition, it is preferable because after the cleaning, the dirt cause substance or the cleaning liquid in which the dirt cause substance is diluted easily moves below the pile, and the dirt becomes inconspicuous.

Although the operation and principle of the above-described excellent effect of the carpet of the present invention are not clear, the following can be considered. However, the present invention is not limited to the range of the following effects.
That is, in the carpet of the present invention, in the case of a colored liquid having a low viscosity, the stains are not noticeable only when viewed from the top without cleaning, because it easily moves below the pile. Is a colored liquid having a moisture content of 0.5% or less and having a specific thickness of filaments of a specific density or more and arranged upwards while being in contact with each other. Is considered to move down the carpet.

  In addition, even if the stain on the carpet is left for a long time and then cleaned, it is easy to remove the stain because the moisture content is 0.5% or less and the filament has a specific thickness. This is considered to be because the color of the stain cause on the filament is difficult to adsorb by using the twisted yarn. Further, it is considered that the stains are difficult to see after the cleaning because the filaments are lined up while contacting each other at a specific density or higher.

  EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples and comparative examples. However, the present invention is not limited to these examples unless it exceeds the gist.

Example 1
Using a 2400 denier twisted yarn made by twisting three yarns made of 100% polypropylene, 40 filaments of 20 denier filament (Dagris made by Mitsubishi Pyrene Co., Ltd.) and 800 denier. A tufted carpet was produced. The twisted yarn was manufactured by an intermingle manufacturing method.
Ten twisted yarns of 2400 denier in the transverse direction (Gauge) per 2.54 × 10 ⁻² m (per inch) and in the longitudinal direction (Stech) per 2.54 × 10 ⁻² m (1 inch) It was woven with 12 pieces.

The filaments are light beige, and therefore the carpet is light beige, and the beige colorant is the original yarn blended into the raw material prior to the filament spinning stage.
A cut carpet having a length of hair feet (pile) of 7 mm was produced. Azabu was used for backing. This is referred to as “carpet 01”.
The moisture content measured based on JIS L 0105 of polypropylene is 0.0%.

Comparative Example 1
In Example 1, instead of 100% polypropylene, the fiber material is 80% wool and nylon (registered trademark) 20%, and one spun yarn having a thickness of 1285 denier (hair count 7). A cut carpet, which is a tuft carpet, was manufactured using twisted yarns of 2570 denier.
The color, the length of the cut carpet hair (pile), and the backing material and form were the same as in Example 1. This is designated as “carpet 02”.

Since the official moisture content measured based on JIS L 0105 of wool is 15.0%, the moisture content of the used wool is 15.0%, and the official moisture content of nylon (registered trademark) Since the rate is 4.5%, the moisture content of the nylon (registered trademark) used is 4.5%.
The moisture content in the present invention of wool / nylon (registered trademark) = 80/20 is 12.9% from the following.
15.0 (%) × 0.8 + 4.5 (%) × 0.2 = 12.9 (%)

Evaluation Example 1
Soy sauce, sauce, red wine, bleach, cola, vegetable juice, coffee, tea, green tea, mustard, curry, spaghetti, ketchup, chili oil, mayonnaise and tabasco on the carpet produced in Example 1 and Comparative Example 1 above, 50 g of each was placed. In each case, the soil was a circle having a diameter of about 5 cm. The photograph of the state is shown in FIG.1 and FIG.3.

  After leaving for 15 days, use a Lion cleaner and carpet cleaner as a cleaner (detergent), and use a commercial cleaning device (manufactured by TENPO) to clean each stain for 5 minutes according to a conventional method. did. The cleaning device is a device that jets water to remove dirt and vacuums the dirty water.

<Visibility of stains after cleaning after leaving dirt>
After cleaning, 1 hour was allowed to elapse until the cleaner (detergent) was dried, and it was visually observed from the height of the eyes 50 cm above the carpet, and judged according to the following criteria.

<Criteria>
(Double-circle): A spot cannot be visually recognized from 50 cm above.
○: If you look closely from above 50cm, only the outline of the stain appears faint, but it cannot be seen by people walking on the carpet.
Δ: From 50 cm above, it can be visually recognized that the outline of the stain is clearly different from the normal part. However, if a person walking on the carpet looks down, he will not notice that there is a stain unless he is careful.
X: From 50 cm above, it can be visually recognized that the central portion of the stain clearly has a color difference from the normal portion, and a person walking on the carpet will notice that there is a stain.

  The evaluation results are shown in Table 1 and FIGS. That is, from Table 1, FIG. 2 and FIG. 4, the carpet 01 of the present invention (Example 1) was ◎ or ○ for all the soiling causes evaluated, but the carpet 02 (Comparative Example 1) It was x about all the soil causative substances evaluated.

FIG. 2 is a photograph after placing a stain cause on the carpet 01 of Example 1 and cleaning it according to Evaluation Example 1 after 15 days, but it is ◯ with vegetable juice and curry, the others are ◎, There was little or no stain.
On the other hand, FIG. 4 is a photograph after placing a stain cause on the carpet 02 of Comparative Example 1 and cleaning it after 15 days according to Evaluation Example 1. All the stain causes are clearly visible. It was.

Evaluation example 2
50 g of the same cause of contamination as in Evaluation Example 1 was placed on the carpet manufactured in Example 1 and Comparative Example 1 above. In each case, the soil was a circle having a diameter of about 5 cm.

<Visibility of stains when not cleaned after leaving dirt>
Without cleaning or wiping off the dirt, after standing for 15 minutes and after leaving for 15 days, the “visibility of the stain when not cleaning after leaving the dirt” is measured from 50 cm above the carpet. Then, it observed visually and determined by the following criteria.
However, in the case of high-viscosity contaminants, if not cleaned (before cleaning), naturally stains are visible, soy sauce, red wine, bleach, cola, coffee, tea, green tea, chili oil, and Tabasco Only the low-viscosity contaminants were evaluated.

<Criteria>
(Double-circle): A spot cannot be visually recognized from 50 cm above.
○: If you look closely from above 50cm, only the outline of the stain appears faint, but it cannot be seen by people walking on the carpet.
Δ: From 50 cm above, it can be visually recognized that the outline of the stain is clearly different from the normal part. However, if a person walking on the carpet looks down, he will not notice that there is a stain unless he is careful.
X: From 50 cm above, it can be visually recognized that the central portion of the stain clearly has a color difference from the normal portion, and a person walking on the carpet will notice that there is a stain.

  FIGS. 1 and 3 are photographs taken before 15 days after cleaning, respectively, where a stain cause was placed on the carpet 01 of Example 1 and the carpet 02 of Comparative Example 1. FIG. This is a photograph of Evaluation Example 2 that is observed and evaluated without cleaning, but is also a photograph of Evaluation Example 1 before cleaning.

  As can be seen from FIG. 1, in the carpet 01 of Example 1, the stain-causing substances are not cleaned in low-viscosity colored liquids such as soy sauce, red wine, bleach, cola, coffee, tea, green tea, chili oil, and tabasco. However (even before cleaning), no spots could be visually confirmed.

  On the other hand, FIG. 3 is a photograph before cleaning the dirt cause substance on the carpet 02 of Comparative Example 1, and as can be seen from FIG. 3, the carpet 02 of Comparative Example 1 was evaluated before cleaning. All the stains were visually spotted.

  The results evaluated after 15 minutes without cleaning and after 15 days are shown together in Table 2, but the results evaluated after 15 minutes without cleaning were evaluated after 15 days without cleaning. A result almost similar to the result was obtained.

Example 2
A carpet is manufactured in the same manner as in Example 1, except that the fiber material is polyester (PET) (Tetron (registered trademark) manufactured by Teijin) (original yarn) instead of 100% polypropylene. did. This is “carpet 03”.
From the official moisture content (0.4%) described in JIS L 0105 for polyester, the moisture content in the present invention of the filament of carpet 03 is 0.4%.

  In the same manner as in Evaluation Example 2, “visibility of stains when not cleaned after leaving dirt” was evaluated. As a result, the evaluation was between “◎” and “○” for all of the evaluated stains (soy sauce, red wine, bleach, cola, coffee, tea, green tea, chili oil, and tabasco).

Comparative Example 2
A carpet was manufactured in the same manner as in Example 1, except that 80% wool and 20% nylon (registered trademark) were used instead of 100% polypropylene. This is designated as “carpet 04”.
The moisture content of Wool / Nylon (registered trademark) = 80/20 is 12.9%.

  In the same manner as in Evaluation Example 2, “visibility of stains when not cleaned after leaving dirt” was evaluated. As a result, the evaluation was “x” for all of the evaluated stains (soy sauce, red wine, bleach, cola, coffee, tea, green tea, chili oil, and tabasco).

Comparative Example 3
In Example 1, a carpet was manufactured in the same manner as in Example 1 except that the fiber material was 100% polyurethane instead of 100% polypropylene. This is designated as “carpet 05”.
From the official moisture content described in JIS L 0105 for polyurethane-based synthetic fibers, the moisture content in the present invention is 1.0%.

  In the same manner as in Evaluation Example 2, “visibility of stains when not cleaned after leaving dirt” was evaluated. As a result, the same results as in Comparative Example 1 were obtained.

Example 4
A carpet was produced in the same manner as in Example 2 except that the filament made of the polyester fiber of Example 2 was changed from the original yarn to post-dying. This is designated as “carpet 06”.

The carpet 06 was evaluated in the same manner as in Examples 1 and 2 in Evaluation Example 2.
As a result, the stain became invisible after 15 minutes without cleaning, but the level was inferior to that of Example 2 using the original yarn. The cause of contamination easily enters the filament, and it becomes easier to find traces of stains (stains, etc.) after cleaning and before cleaning.
Further, when a post-dyed filament is used, traces may remain even after cleaning for bleach, curry, tabasco and vegetable juice.

Example 5
In the carpet of Example 1 (Carpet 01), the thickness of one filament, the thickness of the twisted yarn woven into the carpet, and the twisted yarn woven per 6.45 × 10 ⁻⁴ m ² (per square inch). Carpet No. 1 was the same as in Example 1 except that the number of dots (that is, the number of dots per square inch) was as shown in Table 3. 07-18 were produced.
The other conditions such as the material of the filament fiber (thereby moisture content), the weaving method, the length of the bristle (pile), the backing and the like were the same as those of the carpet 01 of Example 1.

Evaluation Example 3
Carpet No. 07 to 18 were evaluated in the same manner as in Evaluation Example 2 using coffee and red wine as stain causes having a low viscosity, and judged in the same manner. The results are shown in Table 4.

As is apparent from the results in Table 1, the carpets 01, 07, 09, 11, 13, 15, and 17 of the present invention were all “発 明”.
On the other hand, carpets 08, 10, 02, 14, 16, and 18 were “Δ” or “×”.

In the carpet of the present invention, dirt is easy to remove by cleaning, dirt is not noticeable after cleaning, and if it is a liquid having a low viscosity without cleaning, the dirt becomes invisible even before cleaning. It is widely used as a general purpose carpet.
In particular, since it can be cleaned so that the dirt does not stand out even if it takes a long time after the dirt is attached, it is particularly suitably used as a carpet laid on the floor of a hotel or the like.

Claims (6)

A carpet in which a single yarn having a thickness of 1600 denier or more and 3500 denier or less is pierced or woven upward at a density of 64 or more and 150 or less per 6.45 × 10 ⁻⁴ m ² . The twisted yarn is formed by twisting a filament made of a fiber having a moisture content of 0.5% or less measured according to JIS L 0105, and the thickness of one filament is 5 denier. A carpet characterized by being 200 denier or less.   The carpet according to claim 1, wherein the fiber is an original yarn obtained by spinning a material containing a colorant. 8 to 15 strands per 2.54 × 10 ⁻² m in the lateral direction and 8 to 15 strands per 2.54 × 10 ⁻² m in the longitudinal direction The carpet according to claim 1 or 2, wherein the carpet is embedded or woven.   The carpet according to any one of claims 1 to 3, wherein the fiber material having a moisture content of 0.5% or less is polyester, polyethylene, or polypropylene.   The carpet according to any one of claims 1 to 4, wherein the twisted yarn is formed by twisting a monofilament. A filament composed of fibers having a moisture content of 0.5% or less measured according to JIS L 0105 is twisted, and a filament having a thickness of 5 to 200 denier is twisted, and a yarn having a thickness of 1600 to 3500 denier, 6. A method for producing a carpet, characterized by being pierced or woven into a base fabric at a density of 64 or more and 150 or less per 6.45 × 10 ⁻⁴ m ² .