JP2012525197A - carpet - Google Patents

Abstract

  Carpets with tall and low piles, most of the fibers that make up tall piles are lighter in weight than the smallest fibers that make up tall piles, and especially tall piles vary in weight. And the weight of some of the fibers in the tall pile is less than 15 dTex, preferably less than 5 dTex, and the weight of the fibers in the rest of the tall pile is less than 25 dTex.

Description

Detailed Description of the Invention

  The present invention relates to a carpet for covering a floor. The present invention particularly relates to a carpet that reduces fine dust in a laid space.

  For example, increasing airtightness for building air conditioning reduces the exchange of air and outside air in the space, increasing the concentration of fine dust and other contaminants in the space.

  Dust and endotoxins are a major problem for people with allergies. Small particles have the effect of irritating the respiratory tract when inhaled, especially in people with weak lungs. Also, contaminants such as allergens and endotoxins adhere to these small particles and are inhaled into the lungs. For example, when dust floating in the blood enters the blood, the blood density increases and the risk of a heart attack increases, so the dust can cause disease.

  It is generally considered that floor coverings containing textiles (eg carpets) are inappropriate for people with asthma symptoms.

  So-called dust control carpets are known, but are not so much considered to prevent (fine) dust and dirt from rolling up into the air (in the space where the carpet is laid) Rather, the focus is on removing dust and dirt from footwear. To achieve this goal, a relatively tall pile with fine filaments and a relatively short pile with coarse fibers or filaments are usually applied together with a cut pile to remove dirt from the footwear. Drop it.

  EP 0 378 004 describes such a dust control carpet. The carpet includes a first region having fine spun yarn and a second region having coarse spun yarn. Both regions are preferably at least 2 mm wide. The fine spun yarn is formed of fibers of 15 dpf to 60 dpf (16 dTex to 55 dTex), and the coarse spun yarn is formed of fibers of 150 dpf to 5000 dpf (160 dTex to 5500 dTex). However, the carpet described in EP0 378 004 is not aimed at reducing fine dust in the space, nor is it suitable for achieving this purpose.

  US Pat. No. 4,820,566 also describes a dust control carpet with a fine tall tuft and a coarse low tuft. The carpet described in U.S. Pat. No. 4,820,566 does not have the purpose of reducing or fixing fine dust. The weight of fine fibers is 15 dpf to 50 dpf, and the weight of coarse fibers is 150 dpf to 500 dpf.

  However, it is an object of the present invention to provide a carpet that leads to a reduction in fine dust in the space or contributes to enabling such a reduction.

  In order to achieve this object, the present invention provides a carpet having a base structure composed of a primary base fabric provided with a tall pile and a low pile, wherein a large number of fibers of the tall pile constitute the tall pile. A carpet is provided that is lighter in weight than the smallest fibers to be produced, and that the weight per unit length of at least some of the tall pile fibers is less than 15 dTex, preferably less than 5 dTex. The terms “tall” and “tall” are to be understood herein to mean relative heights, and thus a tall pile is compared to a tall pile. Is expensive. However, the tall pile is preferably at least 1 mm taller than the tall pile.

  In the present application, the dimension expressed in units of dTex in relation to the present invention is a dimension related to the filament (also referred to as dpf in this field). The spun yarn used may be provided with a plurality of these filaments.

  Since the carpet has both a tall pile and a low pile, the action of dust being brought into the carpet is suppressed. The fine dust enters a space formed at a place where the low pile is arranged between the tall pile and the tall pile. Once in this space, the fine dust is firmly held and will not enter the area of the room again. A tall pile with extremely fine filaments captures and holds the smallest particles (<10 μm) firmly. The relatively short pile has a relatively thick spun yarn where relatively coarse dust is collected. The above-mentioned effect that fine dust is fixed is obtained by applying at least some of the fibers of the tall pile, whose weight per unit length is less than 15 dTex, preferably less than 5 dTex. By fine dust is intended particles of the order of PM10 or PM2.5 (particulate matter), for example.

  PM10 matches potentially inhaled particles with an aerodynamic diameter of less than 10 μm. Particles of this size generally cause health problems because they are carried through the throat and nose and enter the lungs.

  PM2.5 matches particles that can be inhaled with aerodynamic diameters less than 2.5 μm. These particles can affect the vasculature, and exposure to these particles for extended periods can shorten their lifetime.

  Tall piles are made from yarns that form the contact surface of the carpet according to the invention and are preferably formed by fibers having different weights per unit length. It has been found that it is particularly suitable if the weight per unit length of the remaining portion of the tall pile other than the above is less than 25 dTex. The portion occupied by fibers of less than 15 dTex, preferably less than 5 dTex, is preferably more than 30%, more preferably more than half and even more preferably more than 70%.

  Coarse fibers also have the purpose of constituting an open pile structure for carpets, which allows for better air flow during carpet cleaning. According to the measurement result using the sensor arranged at the position of the base portion of the pile through the base fabric, the air flow when the carpet according to the present invention is sucked with the vacuum cleaner is Measurements at a slightly higher position show that it is 28 m / s versus 18 m / s for a standard carpet. This can demonstrate that high density fine dust can be discharged in large quantities.

  Another purpose is to collect fine dust so that it can be discharged afterwards and further prevented from entering the space again. In order to achieve this object, it is preferred that the low pile is made from yarns composed of fibers having a weight per unit length of more than 400 dTex. To achieve this goal, multiple yarns with different weights per unit length can be used by tufting from different bobbins or cones on the foundation structure, and several different types before placing It is also possible to use a pre-formed preparation from the yarn.

  The low pile is surrounded by a high pile, so fine dust is carried when a person walks on the carpet or when there is a flow of air parallel to the carpeted floor. In the same manner as described above. However, when the carpet is sucked with a vacuum cleaner, the air flow is substantially perpendicular to the carpet and away from the carpet. For this reason, all the piles are sucked straight upwards and fine dust is easily collected. Appropriate widths of the space between the tall piles were found to be 5.1 mm (1/10 ″ × 2) and 6.4 mm (1/8 ″ × 2).

  At least one of the tall pile and the low pile may be a loop pile in order to further suppress the wiping action and the resulting dust roll-up. More preferably, both the tall pile and the low pile are constituted by loop piles.

  Such piles can be formed by tufting and can be formed by a number of methods of manufacturing carpet. The tall pile and the low pile can be designed in various ways, for example, can be mixed, arranged alternately in one or more rows, or optionally They may be arranged in a chessboard pattern or randomly.

  Next, the present invention will be described with reference to the following drawings.

  FIG. 1 shows a carpet according to the invention.

  FIG. 2 shows a carpet according to the invention during the removal of fine dust.

  Figures 3a to 3f show several comparative tests comparing a carpet according to the invention with a standard carpet or a hard floor covering such as laminate or linoleum.

  FIG. 1 shows a carpet 1 according to the invention arranged in a space 4 in which fine dust particles 5 and 6 are present. The fine dust particles are attracted by gravity and move downward, and accumulate on the carpet 1. Here, a slight part of the finest particles 6 adheres to the tall pile 2 of the carpet 1 and somewhat coarser particles 5 adhere to the tall pile 3 of the carpet 1. It can be seen that particles 5 accumulate in the space between the two tall piles. Thereby, the particles 5 do not soar by the flow of air parallel to the carpet 1 (by walking in the space or in the direction generated, for example, by ventilation), but again in the air in the space. There is no scattering.

  FIG. 2 shows the direction in which the dust particles 5 and 6 move from the tall pile and the low pile due to a substantially vertical air flow away from the carpet 1. Such an air flow is generated during suction by the vacuum cleaner, and as shown in the drawing, the collected dust can be discharged at a high density. Therefore, the carpet functions as a renewable fine dust reservoir.

  Figures 3a to 3d show the amount of dust in the space covered by the carpet (A) according to the invention as a function of time compared to a standard carpet (B).

  FIG. 3a shows a comparison between the carpet (A) according to the invention and a standard carpet (B), in which the amount of particles of size PM10 is illustrated as a function of time. The graph shows that the air flow is generated several times to cause turbulence corresponding to the wind flow or ventilation caused by walking. In the carpet (A) according to the present invention, even if the amount of fine dust is large at the start of the test, the dust rolled up as described above is compared with the standard carpet (B) after a certain period. And very little.

  FIG. 3b shows a comparison between the carpet (A) according to the invention and a standard carpet (B), in which the amount of particles with a size of PM2.5 is illustrated as a function of time. The amount of fine dust introduced into the test space in the case of (A) is approximately equal to the amount in the case of (B). After the amount of fine dust PM2.5 was introduced, no difference was found in the deposits. After more time has passed, there will be further differences in eddy currents, for example as a result of air flow caused by a person walking on the carpet or by ventilation, but the final of fine dust in the space The concentration decreases. Similar to FIG. 3a, several air flows are generated to cause turbulence corresponding to the wind flow or ventilation caused by walking. In the carpet (A) according to the present invention, it can be seen that the dust wound up as described above is much less than the standard carpet (B) after a certain period.

  FIG. 3c shows a comparison between the carpet (A) according to the invention and a standard carpet (B), as well as a hard floor covering such as laminate or linoleum (D), and a standard carpet. A comparison with (C) is shown. Similar to FIG. 3a, a certain amount of particles of size PM10 is introduced into the space. It can be seen that the reduction in fine dust particles provided by the carpet according to the invention reaches a number that is more than 10 times that of a hard floor covering.

  FIG. 3d shows a comparison similar to that of FIG. 3a. However, here, particles having a size of PM2.5 are used instead of particles having a size of PM10. Here it can also be seen that the reduction of fine dust particles caused by the carpet according to the invention reaches a value more than 10 times that of a hard floor covering.

  FIG. 3e shows the result of averaging 15 comparisons of a fine dust-reducing carpet and a hard floor covering according to the present invention. It can be seen that the PM10 particles in the air exhibit a concentration B by the carpet according to the present invention. This concentration is 1/8 times that of the hard floor covering A.

  FIG. 3 f shows the result of averaging 15 comparisons of a fine dust-reducing carpet and a hard floor covering according to the present invention. With the carpet according to the present invention, it can be seen that particles of PM2.5 in the air exhibit a concentration B '. This concentration is 1/3 times that of the hard floor covering A '.

  For comparison, standard “low level loop” carpets have only a slight improvement in density (= 1.3) over hard floor coverings, which is ½ each of that for hard floor coverings. .

  Based on the above figures, in the carpet according to the invention, on the one hand, the carpet ensures that fine dust is firmly held in the space formed between the tall pile and the tall pile, and On the one hand, it can be concluded that the ability to capture fine filaments in tall piles has increased, so that it is very insensitive to air vortices and turbulence in the carpeted space.

  700 dTex spun yarn with 30 filaments (ie 23.3 dTex or dpf per filament) and 320 dTex spun yarn with 72 filaments (ie 4.4 dTex or dpf per filament) A 1: 5 dTex spun yarn with 4 filaments (ie 400 dTex or dpf per filament) and a 1000 dTex spun yarn with 42 filaments used to produce a tall pile using a ratio of 3: 5 By producing a low pile using 5: 3 ratio (ie 23.8 dTex or dpf per filament), one embodiment that works very well in practice is obtained.

  In addition to the illustrated embodiments, several variations are possible, all of which are within the protection scope of the following claims. It is specifically described that the carpet according to the present invention can be manufactured as a carpet extending from wall to wall or as a carpet tile. In any case, the pile is secured to the base of the tuft by pre-coating and thick coating or by melting, for example, and the protective layer and / or the reinforcing layer can be, for example, bitumen, polyolefin, PVC, It consists of SBR or EVA.

1 shows a carpet according to the present invention. 1 shows a carpet according to the invention during the removal of fine dust. Figure 2 shows a number of comparative tests comparing a carpet according to the invention with a standard carpet or a hard floor covering such as laminate or linoleum. Figure 2 shows a number of comparative tests comparing a carpet according to the invention with a standard carpet or a hard floor covering such as laminate or linoleum. Figure 2 shows a number of comparative tests comparing a carpet according to the invention with a standard carpet or a hard floor covering such as laminate or linoleum. Figure 2 shows a number of comparative tests comparing a carpet according to the invention with a standard carpet or a hard floor covering such as laminate or linoleum. Figure 2 shows a number of comparative tests comparing a carpet according to the invention with a standard carpet or a hard floor covering such as laminate or linoleum. Figure 2 shows a number of comparative tests comparing a carpet according to the invention with a standard carpet or a hard floor covering such as laminate or linoleum.

Claims (10)

A carpet having a base structure with a tall pile and a low pile,
Some of the fibers that make up the tall pile are lighter in weight than the smallest fibers that make up the tall pile,
A carpet characterized in that the weight of at least some of the fibers of the tall pile is less than 15 dTex, preferably less than 5 dTex.   The carpet of claim 1, wherein the tall pile is composed of fibers of various weights.   The carpet of claim 2, wherein the weight of at least half the fibers of the tall pile is less than 5 dTex.   4. The carpet of claim 3, wherein the weight of the remaining portion of the tall pile is less than 25 dTex.   The carpet according to any one of claims 1 to 4, wherein the weight of the fibers of the low pile is more than 400 dTex.   The carpet according to any one of claims 1 to 5, wherein at least the tall pile or the low pile includes a loop pile.   The carpet according to any one of claims 1 to 6, wherein the pile is tufted.   The carpet according to any one of claims 1 to 7, wherein the tall pile and the tall pile are arranged in a mixed manner.   The carpet of claim 8, wherein the tall pile and the low pile are alternately arranged in one or more rows.   The carpet according to claim 8, wherein the tall pile and the low pile are optionally arranged in pairs as a chessboard pattern or randomly.

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