JP2003000419A - Carpet for flooring - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a comfortable carpet flooring which gives no damp feeling and prevents growth of molds, bacteria and features deodorant effect, although the carpet is made of a low hygroscopic synthetic fiber. SOLUTION: The carpet for flooring comprises the low hygroscopic synthetic fiber as the main body, featuring a layer of packing martial that works as an excellent moisture absorbent and releaser, antibacterial and deodorant with the layer of packing material, having organic micro particles that work as the excellent moisture absorbent and releaser, in which the quantity of the organic particles to be added is advisably between 10-100 g/m<2> . It is also the carpet for flooring made by a conversion into a carboxyl group and salt-type carboxyl group through hydrolysis of nitrile group of the polymer of a cross- linked acrylonitrile system, in which the organic micro particles with the excellent moisture absorbency and release, antibacterial and deodorant effect introduce a cross-linked structure to the polymer of the acrylonitrile system, having more than 1.0 mmol/g of the carboxyl group and the salt-type carboxyl group.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a carpet for flooring directly laid on a flooring, and more specifically, it improves the hygroscopicity of a carpet made of a synthetic fiber raw material / material having a low hygroscopicity and provides comfortable feeling without stuffiness. The present invention relates to a carpet for flooring, which prevents the generation of mold due to dew condensation on the human body and has antibacterial and deodorant properties and imparts cleanliness.

[0002]

2. Description of the Related Art Due to changes in living environment and allergen problems, the use of tatami-mat rooms and carpets is decreasing year by year, and the number of flooring rooms is increasing.
Flooring floors often use rugs called "center rugs" only in the center of the room rather than carpets. In addition, the tendency toward cleanliness has increased, and carpets that can be washed even in the case of rugs have been demanded. As a result, synthetic fibers made of low hygroscopic material have come to be often used as raw materials and materials for carpets.

The center rug of a carpet for flooring is usually a tufted carpet produced by tufting a dyed pile yarn on a synthetic fiber primary base fabric and a fabric prepared by knitting raw yarn with a double Russell knitting machine, generally called Meyer fabric (hereinafter The main products are Meyer polisher carpets, which are dyed by printing, etc., and then pile yarns are opened and then polished with a shearing machine. For tuft carpets, polypropylene slit yarns or polyester non-woven fabrics are used for the primary base fabric, and for Meyer polisher carpets, polyester filaments are used for the ground yarns. In addition, a polyester non-woven fabric is often used as the secondary base fabric.

Since a carpet for flooring, that is, a center rug is used by lying down on the body, when a low hygroscopic synthetic fiber raw material / material is used, discomfort due to stuffiness caused by sweat from the human body or the back surface of the carpet or the floor surface of the carpet is caused. It has the drawback of causing mold. In order to solve these problems, natural fibers that are hygroscopic in the past and present, namely hemp
We use raw materials and materials for cotton, silk, wool and fibrin-based chemical fibers. In particular, in pile yarns used for piles, these fiber raw materials are used by blending or knitting.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and its purpose is to maintain the original functions of carpet, namely, heat retention, heat insulation, cushioning, sound deadening, and durability. In addition to having decorativeness and a pleasant touch, it also improves the hygroscopicity of carpets made of low-moisture-absorbent synthetic fiber materials and materials, is comfortable without stuffiness, prevents mold growth, and has excellent antibacterial and deodorant cleanliness. It is to provide the carpet for the given flooring.

[0006]

The present invention employs the following means in order to solve the above problems. 1. A carpet for flooring, which is mainly composed of a low hygroscopic synthetic fiber and has a backing agent layer having high hygroscopicity, antibacterial properties and deodorant properties. 2. The backing agent layer contains organic fine particles having high moisture absorption / release properties, antibacterial properties, and deodorant properties, and the applied amount of the organic fine particles is 10 to 100 g / m ² . Flooring carpet. 3. The organic fine particles having high moisture absorption / release properties, antibacterial properties, and deodorant properties are obtained by hydrolyzing a nitrile group of an acrylonitrile-based crosslinked polymer obtained by introducing a crosslinked structure into an acrylonitrile-based polymer by treating with a hydrazine-based compound, thereby forming a carboxyl group and a salt type. A carboxyl group converted to a carboxyl group, wherein the carboxyl group and the salt-type carboxyl group are 1.
The carpet for flooring according to claim 2, which has 0 mmol / g or more. 4. The organic fine particles having high moisture absorption / desorption, antibacterial and deodorant properties are obtained by hydrolyzing the nitrile group of an acrylonitrile cross-linked polymer having a cross-linked structure introduced by using a compound having two or more polymerizable vinyl groups as a copolymerization component. A compound obtained by chemically converting into a carboxyl group and a salt-type carboxyl group, wherein the carboxyl group and the salt-type carboxyl group are 1.
The carpet for flooring according to claim 2, which has 0 mmol / g or more. 5. When the organic fine particles having high moisture absorption / release properties, antibacterial properties, and deodorant properties have a moisture absorption rate of 20% or more in a measurement environment of 20 ° C. and a relative humidity of 65%, the release in the case of shifting to 20 ° C. and a relative humidity of 40%. Humidity is 5% or more, JIS-L-190
The carpet for flooring according to any one of claims 2 to 4, which has a bacteriostatic activity value of 2.2 or more and has deodorant properties. 6. The carpet for flooring according to any one of claims 1 to 5, wherein the deodorizing property is ammonia deodorizing property.

That is, according to the present invention, with these constitutions, a hygroscopic layer of a backing agent having antibacterial and deodorant properties is formed between the primary base fabric or the ground yarn and the secondary base fabric. It achieves the purpose.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Organic fine particles having high moisture absorption / release properties, antibacterial properties and deodorant properties (hereinafter sometimes referred to as organic fine particles) according to the present invention exhibit high moisture absorption / release properties, antibacterial properties and deodorant properties. The organic fine particles to be used are not particularly limited as long as they are natural products and synthetic products as long as they can be mixed with the backing agent, but from the viewpoint of ease of expression of performance, mixability, etc., The vinyl-based crosslinked polymer shown in (4) can be preferably used.

An example thereof is an acrylonitrile-based crosslinked polymer obtained by introducing a crosslinked structure into an acrylonitrile-based polymer by treating with a hydrazine-based compound and converting the residual nitrile group into a carboxyl group and a salt-type carboxyl group by hydrolysis. The acrylonitrile-based polymer fine particles as a starting material is an AN-based polymer containing 40% by weight or more, preferably 50% by weight or more of acrylonitrile (hereinafter referred to as AN). The AN-based polymer may be either an AN homopolymer or a copolymer of AN and another monomer, and as the other monomer, vinyl halide and vinylidene halide; (meth) acrylic acid ester (note that (meth ) Represents both those with and without the word of the meta); sulfonic acid-containing monomers such as allyl sulfonic acid, methallyl sulfonic acid, p-styrene sulfonic acid and salts thereof; (meth) acrylic acid,
Carboxylic acid-containing monomers such as itaconic acid and salts thereof; other monomers such as acrylamide, styrene and vinyl acetate. The method for obtaining the starting AN-based polymer fine particles is not particularly limited, and when fine particles of micron order or less are obtained, emulsion polymerization, suspension precipitation polymerization, microemulsion polymerization or the like can be used.

As a method of introducing hydrazine crosslinks into the starting AN polymer fine particles, increasing the nitrogen content is 1.
There is no particular limitation as long as it is a means of 0 to 15.0% by weight, but the hydrazine concentration is 1 to 80%, and the temperature is 50 to 120 ° C.
Is preferably industrially used for 0.2 to 10 hours.
Here, the increase of nitrogen content means the nitrogen content of the raw AN polymer particles (% by weight vs. fine particles) and the nitrogen content of the hydrazine cross-linked AN polymer particles (% by weight vs. fine particles).
And the difference. When the increase in the nitrogen content is less than the lower limit, the fine particles are dissolved in water by the hydrolysis in the next step for introducing the carboxyl group and the salt type carboxyl group, and the present invention cannot be achieved. On the other hand, when the amount exceeds the upper limit, it becomes impossible to introduce 1.0 mmol / g or more of carboxyl group and salt type carboxyl group in the next step, and the present invention cannot be achieved. Regarding the condition that the increase is 1.0 to 15.0% by weight, which is the present invention, by clarifying the relationship between the reaction factors such as reaction temperature, concentration and time and the increase of nitrogen content by experiments, Easy to determine. Examples of the hydrazine used here include hydrazine hydrate, hydrazine sulfate, and hydrazine bromate.

Next, as a method of substantially eliminating the nitrile group remaining without hydrazine crosslinking by a hydrolysis reaction and introducing 1.0 mmol / g or more of a carboxyl group and a salt-type carbosyl group, Means for adding a basic aqueous solution such as alkali metal hydroxide or ammonia, or a mineral acid such as nitric acid, sulfuric acid or hydrochloric acid, or an organic acid such as formic acid or acetic acid, and performing heat treatment can be used. The amount of carboxyl groups and salt-type carboxyl groups used in the present invention is 1.0
For the conditions of mmol / g or more, the reaction temperature,
It can be easily determined by clarifying the relationship between the amount of carboxyl groups and the amount of salt-type carboxyl groups to be introduced with the reaction factors such as concentration and time. The hydrolysis reaction can be carried out simultaneously with the introduction of the cross-linking bond.
Here, when it is decomposed with an acid, it is necessary to convert a part of the carboxyl group into a salt form.

As a method for converting the carboxyl group into a salt type, a method of treating the above-mentioned hydrolyzed particles with various salt type hydroxides or salts exemplified below is preferable. Examples of the salt type of the carboxyl group include alkali metals such as Li, Na and K, alkaline earth metals such as Be, Mg, Ca and Ba,
Other metals such as Cu, ZN, Al, Mn, Ag, Fe, Co, Ni and the like, and organic cations such as NH ₄ and amines can be mentioned. In addition, when the carboxyl group and the salt-type carboxyl group are less than the above lower limits, high moisture absorption / release properties cannot be obtained. As a matter of course, two or more kinds of salt forms may be mixed.

The particle size of the fine particles used in the present invention is not particularly limited, and is 10 to 100 in view of dispersibility in handling and kneading.
μm is preferred.

In this way, 20 ° C., relative humidity 65%
In the measurement environment, the moisture absorption rate is 20% or more, 20 ° C, and when the relative humidity is changed to 40%, the moisture release rate is 5% or more. You can The method for measuring the moisture absorption / desorption rate is described in the section of Examples.

[0015]

[Function] The reason why the high moisture absorbing / releasing fine particles have the high moisture absorbing / releasing property is
Although it has not been fully clarified, it can be considered as follows. That is, since the fine particles used in the present invention start from an AN-based polymer and the nitrile group is substantially eliminated, the side chain bonded to the polymer chain is a nitrogen atom formed by the reaction with hydrazine. A crosslinked structure containing
It is considered to be a carboxyl group and a salt-type carboxyl group generated by hydrolysis of a nitrile group. Generally, a carboxyl group and a salt-type carboxyl group have a moisture absorbing / releasing property, but the high moisture absorbing / releasing property of the fine particles cannot be obtained only with this amount. Therefore, it is considered that the crosslinked structure also has hygroscopicity.
Furthermore, the reason why it does not have a sticky feeling in a moisture-absorbed state is probably because it is highly crosslinked.

The reason why the fine particles have an antibacterial property is considered to be that primary to tertiary amine groups are formed in the nitrogen-containing crosslinked structure formed by the reaction with hydrazine. It is well known that the quaternary ammonium salt is a typical organic antibacterial agent, but the primary to tertiary amine groups also have antibacterial properties, although they have lower antibacterial properties than those.

The reason why the fine particles have a deodorizing ability for ammonia, amines and lower fatty acids is that the odor is neutralized and coordinate-bonded to the carboxyl group and salt type carboxyl group produced by hydrolysis of the nitrile group. And, it is a reversible reaction that the performance is easily recovered by sun-drying or washing at home. It also has the ability to adsorb and deodorize acetic acid odor, but since it has high moisture absorption and desorption performance, it is considered to be dissolved in moisture absorbed.

As a backing agent for backing processing used for flooring carpets, synthetic rubber S is used.
BR (styrene-butadiene rubber), NBR (nitrile-butadiene rubber) latex and resin PV
C (vinyl chloride), EVA (ethylene / vinyl acetate) and the like are used, but the present invention is not limited thereto. However, what is predominant at present is a self-crosslinking SBR latex in which 1 to 2% of unsaturated carboxylic acid is copolymerized with SBR, which has many advantages such as adhesiveness, and can be recommended in the present invention. As the unsaturated carboxylic acid monomer, acrylic acid, methacrylic acid, itaconic acid, itaconic acid ester, maleic acid, maleic acid ester or the like is used.

The amount of organic fine particles contained in the backing agent for backing processing is 10 to 200 g, preferably 25 to 100 g per square meter of carpet.
Is. If it is less than 10 g, the substantial moisture absorption effect cannot be obtained, and if it exceeds 100 g, it is not economical and the backing strength is lowered, and the durability required for the carpet cannot be sufficiently obtained.

[0020]

EXAMPLES The present invention will be described in detail with reference to the following examples, but the present invention is not limited to the following examples.
The parts and percentages in the examples are shown by weight unless otherwise specified.

The amount of carboxyl groups and salt-type carboxyl groups (mmol / g), moisture absorption rate (%), antibacterial property and deodorant property were determined by the following methods.

Amount of carboxyl groups and salt-type carboxyl groups (mmol / g): Approximately 1 g of sufficiently dried test particles
Was weighed accurately (Xg), 200g of water was added thereto, and then 5
While warming to 0 ° C., a 1N hydrochloric acid aqueous solution was added to adjust the pH to 2, and then a titration curve was determined with a 0.1N caustic soda aqueous solution according to a conventional method. The caustic soda aqueous solution consumption amount (Yg) consumed by the carboxyl group was obtained from the titration curve, and the carboxyl group amount was calculated by the following formula. Amount of carboxyl group = 0.1Y / X Separately, a titration curve was similarly obtained without adjusting the pH to 2 by the addition of the 1N hydrochloric acid aqueous solution during the carboxyl group amount measurement operation, and the amount of carboxylic acid was obtained. From these results, the salt type carboxyl content was calculated by the following formula. (Amount of salt type carboxyl group) = (Amount of carboxyl group)-(Amount of carboxylic acid)

Moisture absorption rate (%): Approximately 5 g of sample fine particles are dried in a vacuum dryer at 70 ° C. for 12 hours, and the weight is measured (W
1 g). Next, the sample is placed in a predetermined constant humidity chamber at a temperature of 20 ° C. for 24 hours, and the weight of the sample thus absorbed is measured (W2g). From the above measurement results, it was calculated by the following formula. Moisture absorption rate (%) = (W2-W1) x 100 / W1

Antibacterial property: JIS-L-1902 Textile product antibacterial property test method 8. It was evaluated by the bacteriostatic activity value by (quantitative test).

Deodorizing property: After the sample was put in the container, air was evacuated, gas was injected, and the gas concentration in the container after 2 hours was measured by a gas detector tube, and the deodorizing rate was calculated by the following formula. .

[0026]   Measurement conditions 1. Sample weight: 1g              2. Container: polyethylene tetra bag              3. Container capacity: 1.5 liters              4. Gas amount: 1.0 liter              5. Measurement temperature: 20 ℃              6. Initial concentration of gas: Ammonia 100ppm                                  Acetic acid 100ppm                                  Triethylamine 30ppm                                  Caproic acid 3ppm

Example 1 Methacrylic acid / sodium p-styrene sulfonate = 70
/ 30 water-soluble polymer 300 parts and sodium sulfate 3
0 part was dissolved in 6595 parts of water and charged into a polymerization tank equipped with a paddle-type stirrer. Next, acrylonitrile (AN) 270
15 parts of 2,2′-azobis- (2,4-dimethylvaleronitrile) was dissolved in 0 part and 300 parts of methyl acrylate and charged into a polymerization tank, and the mixture was stirred at 400 rpm under 6 rpm.
Polymerize at 0 ° C for 2 hours, polymerization rate 87%, average particle size 52μ
m high nitrile polymer was obtained. 6 to 100 parts of the polymer
50 parts of 0 wt% hydrazine and 850 parts of water are mixed,
Crosslinking was introduced by treating with hydrazine under conditions of 90 ° C. for 3 hours, 100 parts of caustic soda was further added, and reaction was carried out at 120 ° C. for 2 hours to hydrolyze all of the remaining nitrile groups and to recover the carboxylic acid. An acid group (sodium type at the end of the hydrolysis reaction) was introduced. The obtained polymer was dispersed in water, adjusted to pH 6.5 with nitric acid, calcium nitrate was added, and metal treatment was performed at 60 ° C. for 2 hours, followed by washing, dehydration and drying to obtain a highly hygroscopic and organic compound. Fine particles were obtained. The characteristics of the fine particles are that the moisture absorption rate at 20 ° C. and 65% RH is 40%, the moisture release rate at the time of shifting to 20 ° C. and 40% RH is 5.5%, and the bacteriostatic activity value against Staphylococcus aureus is 4.3, the ammonia deodorization rate was 100%, and it was confirmed that the polymer fine particles had excellent high moisture absorption / release properties, antibacterial properties and deodorant properties.

Metric pile 2 / 32s bulky yarn made of 100% acrylic short fiber for pile yarn <Toyobo Co., Ltd.> Exlan type XKD538G is used, and polyester multifilament 165 decitex <Toyobo Co., Ltd. is used for the ground yarn. , A single-sided pile cloth (generally referred to as Meyer cloth, hereinafter referred to as Meyer cloth) having a width of 2 meters and a pile yarn weight of 600 g / m ² on an 18 gauge double Russell warp knitting machine <manufactured by Nippon Meyer Co., Ltd.>. ) Was produced. Then, printing was carried out using a cationic dye by a conventional method to prepare a woven raw fabric dyed with a polisher carpet for flooring.

As a backing agent, a self-crosslinking SBR compound <manufactured by Togaku KK> and a solid content of 80% by weight were prepared (hereinafter referred to as latex). The above-prepared organic fine particles having high hygroscopicity, antibacterial property, and deodorant property prepared in the above-mentioned manner are added to each of 25
g, (2) 50 g, and (3) 100 g were mixed and prepared to prepare a backing agent.

Needle punched non-woven fabric using polyester short fibers, with a basis weight of 150 g / m ² <made by Koizumi Seima Co., Ltd.> was prepared as the secondary base fabric, and the dyed fabric stock of [0025] was prepared as follows. Using the above-mentioned three types of backing agents 800 g / m ² (1) to (3), the secondary base fabric was backed by the direct coating method.

Backing (1)-
For (3), a brushing machine, a shearing machine, and a polishing machine were used to finish hair splitting 4 times, shearing, polishing 4 times, and shearing in this order to obtain a finished fabric. 2m x
After being cut to a size of 2 m, four sides were sewn with a trimming cloth to obtain a carpet having a polished finish for living.

COMPARATIVE EXAMPLE 1 As a comparative example, the same polished finisher carpet for living as in the example was added to the backing agent with organic fine particles having high moisture absorption / desorption, antibacterial and deodorant properties to prepare a processed product. Obtained.

The polishing carpets for flooring obtained in Examples and Comparative Examples 1 were evaluated for antibacterial properties, deodorant properties and moisture absorptive and desorptive properties of the carpets. The evaluation of the moisture absorptive and desorptive properties of the carpet was performed by the following method. Table 1
The evaluation test results are shown in.

Moisture absorption and desorption (measurement of change in weight of carpet after moisture absorption and desorption) 2000 square cm of sample carpet is dried at 70 ° C. for 12 hours, and the weight is measured (W1g). Next, 20 ℃, 65%
The sample is left to stand in the humidity chamber of RH for 24 hours, and the weight of the sample thus absorbed is measured (W2g). Next, 20 ℃, 40
Move it to a humidity chamber of% RH and keep it for 24 hours. The weight of the sample thus dehumidified is measured (W3g). From the above results, it was calculated by the following formula. Moisture absorption (g) = W2-W1 Moisture release (g) = W2-W3

[0035]

[Table 1]

As shown in Table 1, the carpet of the present invention is
Its original function, namely heat retention, heat insulation, cushioning, sound deadening, durability, etc.
A clean flooring carpet that is comfortable, effective in preventing mold growth, and has antibacterial and deodorant properties.

[0037]

The flooring carpet of the present invention comprises:
Although it is a carpet made of synthetic fiber raw materials / materials with low hygroscopicity laid directly on the flooring, the backing agent layer has high hygroscopicity and antibacterial and deodorant properties, so hygroscopicity is improved. It is possible to provide a clean carpet for flooring having antibacterial and deodorant functions.

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) D06M 15/693 D06M 15/693 F term (reference) 3B120 AD09Z AD18Z BA45 EB03 EB23 EB25 4J100 AB02Q AB07Q AC03Q AC04Q AG04Q AJ02Q AJ08Q AK01Q AL02Q AM02P AM15Q AP01Q BA16H BA17H BA18H BA56Q CA01 CA04 CA31 DA37 EA05 HA08 HB25 HB39 HB43 HB44 HB52 HC27 HC54 JA11 4L033 AC07 AC10 AC15 BA49 CA18 CA26 CA68

Claims (6)

[Claims] 1. A carpet for flooring, which is mainly composed of low hygroscopic synthetic fibers and has a backing agent layer having high hygroscopicity, antibacterial properties and deodorant properties. 2. The backing agent layer contains organic fine particles having high moisture absorption / release properties, antibacterial properties and deodorant properties, and the applied amount of the organic fine particles is 10 to 100 g / m ^2. Item 2. The flooring carpet according to Item 1. 3. The organic fine particles having high moisture absorption / release properties, antibacterial properties, and deodorant properties are obtained by hydrolyzing a nitrile group of an acrylonitrile-based crosslinked polymer obtained by introducing a crosslinked structure into an acrylonitrile-based polymer by treatment with a hydrazine-based compound. The flooring carpet according to claim 2, wherein the carpet has been converted into a carboxyl group and a salt-type carboxyl group and has 1.0 or more mmol / g of the carboxyl group and the salt-type carboxyl group. 4. A nitrile of an acrylonitrile cross-linked polymer in which the organic fine particles having a high moisture absorption / release property, an antibacterial property and a deodorant property have a cross-linked structure introduced with a compound having two or more polymerizable vinyl groups as a copolymerization component. 3. A group obtained by chemically converting a group into a carboxyl group and a salt-type carboxyl group by hydrolysis, and having 1.0 or more mmol / g of the carboxyl group and the salt-type carboxyl group. Flooring carpet according to. 5. The organic fine particles having high moisture absorption / release properties, antibacterial properties, and deodorant properties have a moisture absorption rate of 20% or more in a measurement environment of 20 ° C. and a relative humidity of 65% at 20 ° C. and a relative humidity of 40%.
The moisture release is 5% or more when moving to JIS-L
The flooring carpet according to any one of claims 2 to 4, which has a bacteriostatic activity value of -1902 of 2.2 or more and has deodorant properties. 6. The flooring carpet according to claim 1, wherein the deodorant property is ammonia deodorant property.