KR20020035012A - washing-enduring high density micro-fiber fabric - Google Patents

Abstract

PURPOSE: A microporous fabric capable of shielding harmful microorganism and ultrafine byproducts induced therefrom and having an average pore size from 0.1 to 4.0 micrometer, high moisture vapor permeability and washing fastness is provided which can be used as articles for prevention of various allergies such as bed cover, baby garment or the like. CONSTITUTION: This microporous fabric is prepared by processing a synthetic ultrafine fiber such as polyester ultrafine fiber and/or polyester/nylon conjugate fiber at a temperature of 65 to 75deg.C at a speed of 65 to 70 m/min, at a pressure of 25 to 30 ton after weaving. The microporous fiber has an average pore size from 0.1 to 4.0 micrometer and satisfies the formula: Ha<=20% in which Ha is a ratio of Hmax based on the total number of pores and Hmax is a number of pores in which a pore size of the total number of pores is more than the average pore size.

Description

Washing-enduring high density micro-fiber fabric

The present invention relates to a high-density microporous fabric, and more particularly, to a laundry-resistant high-density microporous fabric having an average pore size of 4.0 μm or less even after washing 5 times or more, and capable of blocking harmful microorganisms and ultra-fine by-products caused therefrom. It's about.

The rapid modernization of society as a whole after the Industrial Revolution provided a lot of convenience for humans, but the opposite has caused a big problem of environmental pollution. As a result, the life patterns of a number of microorganisms on the earth that share the same life with humans have also changed, and recently, microorganisms that are very difficult to remove with conventional insecticides have emerged. In addition, due to the development of apartments, the residential culture has become larger, grouped and mainly focused on indoor living, and it has been found that many of the overlooked micromaterials are the causative agents of various diseases. It is known to be an animal's hair and house dust mite. As the microorganisms that cause allergies by parasitic in the environment in which humans work, the most common ones are ticks, especially house dust mites having a size of about 100 to 300 μm, and the size of about 40 μm or less emitted from house dust mites. Eggplants are also known to be a major factor in allergens caused by the decomposition of feces or dead bodies. Other allergens are known as cat fur, cockroaches, and cockroach droppings.

In this regard, Platts-Mills TAE et al., "Dust mite allergens and asthma, Report of a Second International Workshop" (J. of Allergy and Clin. Immunology, Vol. 37, pp.1046-1050, 1992) Group I Mite Allergen has proven that most of it is related to relatively large fecal particles with a diameter of 10 to 40 μm. ”Hong Chun-su's" house dust mite and clinical allergy "(allergy, Vol. 11, No. 3). , pp.297-308, 1991), "House dust mite has been identified as a global problem as a cause of allergic diseases, and is the most important cause of respiratory allergy in Korea. House dust mite as a cause of allergic disease in the general population It's not an exaggeration to say that there is nothing else. "

As these facts become known, measures to prevent microallergens have been taken from various angles. The most effective method currently known as such a preventive method is to use a woven fabric having an average pore size of 10 µm or less by using a microfiber having a single yarn fineness of 0.5 denier or less (see Japanese Patent Laid-Open No. 11-217745). However, such a conventional microporous fabric is difficult to use as a general household goods due to the following several problems. Typically, conventional allergy-resistant fabrics that focus only on reducing the size of the pores, when used in daily necessities, not only produce relatively large friction noises due to the inherent rigidity of the microfibers, but also have poor washing durability and thus the size of the pores after washing. Is rapidly increased, the service life of the product is very short. In addition, products that focus only on the role of the barrier membrane are woven fabrics made of natural fibers and then subjected to non-breathable coating treatments such as urethane and vinyl on the surface, which prevents the penetration of moisture and air. There is a disadvantage that is unsuitable as bedding due to the extremely low fit to the skin, adversely affecting the skin.

Recent studies have also shown that conventional fabrics with an average pore size of 10 μm cannot effectively block allergens. For example, John W. Vaughan et al., "Evaluation of materials used for bedding encasement: Effect of pore size in blocking cat and dust mite allergen" (J. of Allergy and Clin. Immunology, part I, vol. 103, no. pp. 227 ~ 231, February 1999), "To block house dust mite allergens such as Der fI and Der pI below the detection criteria, a fabric having a pore size of less than 10 μm is required, and a fabric having an average pore size of less than 6 μm. Allergens generated from the cat's fur were blocked. " In addition, the allergen barrier fabric shown in Japanese Patent Application Laid-Open No. 11-217745 has an air permeability of 800 g / m 2 with a pore size of 4 to 10 μm and measured at 0.5 to 25 cfm (measured by US Federal Test Standard 5450 as defined by ASTM D-737). It is supposed to have a moisture permeability of more than / 24h, but the fabric is less applicable to the body compared to natural fabrics, and washing it five times, the pores become about 30% (up to 12.5 ㎛), so less than 10 ㎛ It is virtually impossible to block allergens of size.

Accordingly, it is an object of the present invention to provide a high density microporous fabric capable of blocking harmful microorganisms and micro byproducts resulting therefrom. Another object of the present invention is to provide a laundry-resistant high-density microporous fabric useful for daily necessities, which is maintained in an appropriate size of pores after 5 or more washes, and has excellent physical properties such as moisture permeability and air permeability.

1 is a photograph of a high-density microporous fabric according to Example 1 of the present invention after washing 10 times, and then magnified 100 times using a light source microscope.

2 is a pore distribution diagram after washing 10 times the high-density microporous fabric according to Example 1 of the present invention.

3 is a photograph taken after washing 10 times the conventional microporous fabric 100 times magnified using a light source microscope.

4 is a pore distribution diagram after washing ten times the conventional microporous fabric.

In order to achieve the above object, the present invention, in the microporous fabric made of synthetic fiber microfiber, weaving in order to minimize the maximum pore size of 6㎛ or more at the same time the average pore size is less than 4.0㎛ even after washing 5 times or more, There is provided a laundry-resistant high-density microporous fabric, characterized in that the pore size is below 4.0 占 퐉 on average and satisfies Equation 1 below.

Ha ≤ 20%

In the above formula, Ha is the ratio of Hmax to the total pore number, and Hmax means the number of pores whose pore size is equal to or larger than the average pore size among the total pore numbers.

Here, the fabric is woven with a synthetic fiber microfiber having a single yarn fineness of 0.5 denier or less, and after weaving, at a roller temperature of 65 to 75 ℃, a fabric feed rate of 65 to 70 m / min, roller pressure of 25 to 30 ton It is preferable to be manufactured by processing (cire), it can be used as a living room, that is, bedclothes, medical supplies, baby products, clothing, etc. applied to the cover, curtain paper and the like.

Hereinafter, the present invention will be described in detail.

The high-density microporous fabric according to the present invention is obtained by weaving the fabric with a microfiber such as a synthetic fiber microfiber, for example, a polyester microfiber and / or a polyester / nylon composite split yarn, and by post-processing the fabric. Are manufactured.

The single yarn fineness of the synthetic fiber microfiber for producing the fabric according to the present invention is preferably 0.5 denier or less (in the case of a composite split yarn, single yarn fineness after dividing), and more preferably 0.3 denier or less. If the single yarn fineness of the synthetic fiber microfiber exceeds 0.5 denier, it is not possible to obtain a fabric having a preferred micropore. The fabric is prepared by weaving, rinsing, refining, dyeing, flexible and antistatic processing, after-treatment, such as after weaving, the post-processing treatment is the body applicability of the high-density microporous fabric of the present invention, laundry durability It is particularly important in this regard. The sheeting process is preferably carried out at the roller temperature of 65 to 75 ℃, the feed speed of 65 to 70 m / min, the roller pressure of 25 to 30 tons, the temperature of 70 ℃, the speed of 70 m / min, It is more preferable to process at a pressure of 28 tons. In this case, when the temperature of the sieving process is less than 65 ° C., the size of the voids increases, and when the temperature exceeds 75 ° C., the touch of the fabric is impaired. If the fabric conveying speed is less than 65 m / min, the touch is increased, but the voids are increased. This non-uniform problem, there is a problem that the fabric is rigid when it exceeds 70m / min, there is a disadvantage that the treatment agent remains between the fibers if the pressure of the roller is less than 25 tons, if the toner exceeds 30 tons There is a possibility that the phenomenon occurs, the size of the pores becomes large and uneven. In addition, in order to solve the electrostatic problem that arises in conventional fabrics, it is possible to neutralize the charge on the surface of the fabric by performing a conventional electrification treatment, and may further perform a conventional softener treatment and dyeing.

The high-density microporous fabric according to the present invention manufactured through the above process has an average pore size of 4.0 μm or less after weaving and satisfies Equation 1 below, and such a fabric has an average pore size of 4.0 even after washing five times or more. It is minimized that the maximum pore size is 6 µm or more while being less than µm.

[Equation 1]

Ha ≤ 20%

In the above formula, Ha is the ratio of Hmax to the total pore number, and Hmax means the number of pores whose pore size is equal to or larger than the average pore size among the total pore numbers.

In this case, when the pore size degree (Ha) is greater than 20%, it indicates that the pore size is distributed in a range exceeding the average pore as a reference, and in this case, the average pore size after washing 5 times or more is maintained at 4 μm or less. In spite of this, many voids exceed 6 μm, which does not substantially block allergens such as animal hair in some of the products, and there is a concern that the weaving fastness is lowered.

As such, the fabric according to the present invention has an air permeability of 1.0 to 30 cfm and moisture permeability of 1500 g / m 2/24 h or more similar to conventional fabrics, while maintaining a smaller average pore size. It is similar to the fabric and can be used in various allergy-preventing household goods by maintaining the pore size that can block almost all allergens after washing 5 times or more.

Hereinafter, examples and comparative examples are presented to help understand the present invention. However, the following examples are merely provided to more easily understand the present invention, and the present invention is not limited by the following examples.

[Example 1-3, Comparative Example 1-2] Preparation of ultra-fine air gap fabric using split yarn

9-segment 0.2 denier microfibers with 1 filament of nylon and 8 filaments of polyester (Huvis, PN DTY 75d / 36f) were subjected to sizing operation using a general agent (Daehwa Chemical Co., Ltd., NEWJET DH-2001P). It was used as warp and weft yarn, and was flattened to 170 pieces per inch and 70 inches wide using an Air Jet loom.

The prepared fabric was refined at 60 ° C. for 40 minutes using a preparation prepared by adding 10 g / l of a refining agent (scourwet-2002, manufactured by Daedong Petrochemical Industry) to a solution in which 0.5 g of NaOH was dissolved per liter of water. Aged at 60 ° C. for 8 hours, washed with water at 95 ° C. for 40 minutes, and dehydrated. Next, a high density microporous fabric was prepared by using a commonly used sheet processing machine at a roller temperature of 70 ° C., a fabric feed rate of 70 m / min, and a roller pressure of 28 tons. Analyzing the pore size of the prepared microporous fabric, three samples (Example 1-3) where the pore size satisfies Equation 1 and two kinds (Comparative Example 1-2) do not satisfy Equation 1, respectively. 100 units per square inch were adopted.

[Example 4-6, Comparative Example 3-4] Preparation of microporous fabric using polyester sole yarn

A high-density microporous fabric was prepared in the same manner as in Example 1 except that 65 denier, 204 filament-only polyester yarn (Hyosung Co., Ltd., FLAT (WD) & DTY 65D) was used. Analyze the pore size of the prepared microporous fabric to determine the size of the pore size. Three samples (Example 4-6) satisfying Equation 1 and two samples (Comparative Example 3-4) not satisfying Equation 1, respectively. 100 square inches were adopted.

Experimental Example

Table 1 shows the results obtained by washing the fabrics employed in Examples 1-3 and Comparative Examples 1-2 and measuring the physical properties such as the average pore size. The same experiment was conducted for the fabrics employed in Example 4-6 and Comparative Example 3-4, and the results are shown in Table 2. In Tables 1 and 2, the size of the pores is averaged by measuring the size of each of the 200 pores by randomly selecting five of each of the samples in which a square inch of the sample is adopted for the 65-inch full width fabric. Washing was carried out continuously under a neutral detergent using a fully automatic washing machine of a 6L household washing machine, and the pore size was measured using a pore measuring method (certificate number: 20576) proposed by the present inventor and certified by the Korea Household Products Testing Institute. Moisture permeability was conducted by the Korea Textile Testing Institute (FITI), a Korean accredited testing institution, using the water method presented in KS K 0594. Air permeability was measured by the Yarn Fabric Testing Institute (FITI) using the Frazier Method presented in KS K 0570-1997.

division Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Average pore size before washing (㎛) 1.54 1.41 1.63 2.25 3.12 Hmax (pcs) 24 28 27 53 49 Ha (%) 12.0 14.0 13.5 26.5 24.5 Average pore size after washing 10 times (㎛) 1.58 1.47 1.65 3.52 5.13 Pore water exceeding 6 μm One 0 2 35 27 Moisture permeability (g / ㎡ / 24h) 2065 2090 2078 1996 2011 Air permeability (cfm) 10.1 10.4 10.2 11.5 11.1

division Example 4 Example 5 Example 6 Comparative Example 3 Comparative Example 4 Average pore size before washing (㎛) 1.03 1.03 0.98 2.76 3.01 Hmax (pcs) 15 17 16 41 51 Ha (%) 7.5 8.5 8.0 20.5 25.5 Average pore size after 10 washes (㎛) 1.09 1.11 1.06 3.35 4.97 Pore water exceeding 6 μm 0 One 0 36 44 Moisture permeability (g / ㎡ / 24h) 2132 2126 2117 2101 2013 Air permeability (cfm) 8.7 9.1 9.2 10.4 11.2

As shown in Tables 1 to 2, the fabric of the present invention maintains almost the same average pore size as before washing, and the pore size distribution is narrow, as well as moisture permeability or air permeability, even after 10 washings compared with the fabric of the comparative example. Since it is also maintained in a good state, it can be seen that even after washing, excellent allergy-preserving properties and body applicability are maintained.

In addition, after washing the high-density microporous fabric 10 times according to Example 1, the pores of the fabric was photographed (100 times magnified) using a light source irradiation microscope shown in Figure 1, the pore distribution of the fabric is shown in FIG. Indicated. In addition, after washing the conventional microporous fabric 10 times, the pores of the fabric was photographed (100 times magnified) using a light irradiation microscope, and is shown in Figure 3, the pore distribution of the fabric is shown in FIG. As can be seen from Figures 1 to 4, it can be seen that the microporous fabric according to the present invention maintains a very uniform and narrow size distribution of the pores even after 10 washings.

As described above, the fabric of the present invention having a pore size distribution under specific conditions after weaving maintains an average pore size of 4 μm or less even after washing five times or more, and at the same time, almost no pores of 6 μm or more exist. Since it effectively blocks the microorganisms and the ultra-fine by-products derived therefrom, it has improved the practical application problems of existing products, it can be applied to various allergy-prevention household goods such as bed cover, baby clothing.

Claims (5)

A microporous fabric made of synthetic fiber microfiber, wherein the average pore size after weaving is 4.0 µm or less and the pore size satisfies the following formula (1). [Equation 1] Ha ≤ 20% In the above formula, Ha is the ratio of Hmax to the total pore number, and Hmax means the number of pores whose pore size is equal to or larger than the average pore size among the total pore numbers. The method of claim 1, wherein the fabric is manufactured by weaving after weaving at a roller temperature of 65 to 75 ℃, fabric feed rate of 65 to 70 m / min, roller pressure of 25 to 30 ton High density microporous fabric characterized by the above. The high density microporous fabric of claim 1 or 2, wherein the single yarn fineness of the synthetic fiber microfiber is 0.5 denier or less. 3. The high density microporous fabric of claim 1 or 2, wherein the microporous fabric has an air permeability of 1.0 to 30 cfm and a moisture vapor permeability of at least 1500 g / m 2 / 24h. Household articles made by using the high density microporous fabric of claim 1.