JP2009228199A - Woven or knitted fabric excellent in stainproof and water-absorbing and diffusing property, and textile product - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a knitted fabric exhibiting stainproof and water-absorbing and diffusing properties originally owned by natural cellulose fiber itself. <P>SOLUTION: Provided is the woven or knitted fabric expressing original water absorption of cellulose by removing impurities from the natural cellulose and finishing without using a treating agent which prevents water absorption of cellulose to make the woven or knitted fabric the fourth grade or above of gray scale determination comprising dropping a drop of oleinic acid on the sample and laying for one hour, washing following a 103 method (JIS L 0217:1995) and drying and observing. The fabric shows high water-absorbing and diffusing properties such as ≤30 second of water absorbing time and ≥20 cm<SP>2</SP>of diffused area after one minute when dropping 0.2 ml of pure water, and the fabric also show high stainproof and excellent sweat absorption quick-drying properties, such as 5 sec or less of water absorbing time when dropping 0.2 ml of pure water, and ≥10 cm<SP>2</SP>of the diffused area after one minute. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a woven or knitted fabric excellent in antifouling properties and water-absorbing diffusibility, and a textile product, and more specifically, a woven or knitted fabric imparting excellent anti-staining properties and water-absorbing diffusibility while controlling the texture such as the touch, and It relates to textile products made from them.

  Conventionally, various proposals have been made for improving the antifouling property of fibers or fiber products. In recent years, for example, a processing method for a cotton material that suppresses yellowing of the underwear by graft polymerization of a monomer to the cotton material is known (Patent Document 1). Also, by applying a hydrophilization treatment to the fiber or fiber product, even if the laundry is performed without using a detergent, it is possible to provide the function of obtaining almost the same cleaning effect as when using a detergent. A method for imparting a detergent-free washing function that can be performed and a textile product that can be washed without using a detergent are known (Patent Document 2).

  On the other hand, fiber materials such as fabrics are usually subjected to treatments such as desizing, scouring, and bleaching as required, and are often subjected to treatments such as mercerization and dyeing. Natural cellulose fibers such as raw cotton fibers are composed of a secondary cell membrane and a primary cell membrane that covers the membrane via a winding layer. The primary cell membrane is composed of a cuticle layer mainly composed of wax, pectin and protein and a reticulated layer. The secondary cell membrane is composed of a cellulose layer. Since the primary cell membrane inhibits the inherent water absorption of cellulose, the water absorption of raw natural cellulose fibers is not so high.

  Therefore, in the scouring step, a treatment for removing the primary cell membrane and other contaminants is performed mainly for the purpose of improving water absorption and dyeability. In some cases, paste removal before the scouring step and bleaching for the purpose of decolorization after the scouring step are performed individually or simultaneously. In the scouring process of natural cellulose fiber fabric, a process for preparing a scouring solution using a chemical such as sodium hydroxide and a surfactant, immersing the fabric in this solution, and further degreasing at a high temperature is performed. Has been done.

JP-A-8-3872 WO2005 / 005711

  Natural cellulose fibers such as cotton are said to have higher water absorption than, for example, synthetic fibers such as polyester fibers. This is because the water absorption is improved by removing the primary cell membrane in the scouring step. However, as described above, conventionally, an attempt has been made to provide a fabric excellent in antifouling property by graft polymerization of a monomer or fiber to a fiber or a fiber product, or by applying a hydrophilic treatment. This means that the water absorption (or hydrophilicity) of the natural cellulose fiber after the scouring process or after all the various treatments thereafter (for example after dyeing) was still insufficient from the viewpoint of antifouling properties. To do.

  On the other hand, in recent years, with increasing awareness of nature and environmental protection, general consumers are required to obtain products made of natural materials with as little change as possible (that is, in a state closer to nature). is there. The above-mentioned graft polymerization and hydrophilization treatment involves modification or modification of a part of the material, and thus does not necessarily meet this requirement. Therefore, the present inventors have made a woven fabric made of natural cellulose fibers such as cotton having improved antifouling property, without using a hydrophilic treatment involving the introduction of hydrophilic groups or hydrophilic molecules such as graft polymerization or coating. And considered to provide knitting.

  As described above, natural cellulose fibers such as cotton itself have water absorption. However, the present inventors considered that the water absorption may not be sufficiently exhibited in actual products. In fact, if the surface of products made of natural cellulose fibers is analyzed, or considering the components of the processing agents used in the whole process of raw cotton, raw yarn, weaving (knitting) and processing, cellulose in the fibers is removed by scouring There was a possibility that the contact between cellulose and water was hindered by covering with impurities and / or other substances that had not been made, thereby reducing the water absorption. Accordingly, the present inventors have intensively studied to provide a fabric having excellent antifouling properties by enhancing the characteristics of natural cellulose fibers themselves. Until now, no specific proposal has been made.

  The inventors of the present invention have achieved excellent antifouling properties by extremely improving the water absorption of the cellulose fiber woven fabric or knitted fabric in the scouring step after weaving or knitting and maintaining the state in all the processing steps. Woven fabrics or knitted fabrics exhibiting water-absorbing properties and water-absorbing diffusivity can be obtained, and by further setting the cover factor of the woven fabric or knitted fabric to a predetermined value or less, a woven fabric or knitted fabric exhibiting higher antifouling properties can be obtained. And found the present invention.

That is, the present invention, in the first aspect, is a woven fabric containing cellulose fibers, which is allowed to stand for 1 hour after dropping one drop of oleic acid, washed by 103 method (JIS L 0217: 1995), and grayscale determination after drying (JIS L0805: 2005) is grade 4 or higher, and / or when 0.2 ml of pure water is dropped, the water absorption time is 30 seconds or less and the water absorption diffusion area after 1 minute is 20 cm ² or more. Provided is a woven fabric having water-absorbing property and excellent in antifouling property, which is not subjected to a hydrophilic treatment for introducing a hydrophilic group or a hydrophilic molecule into a cellulose molecule.

In the second aspect, the present invention is a knitted fabric containing cellulose fibers, which is allowed to stand for 1 hour after dropping a drop of oleic acid, and is subjected to 103 method (JIS L 0217: 1995) washing and drying gray scale determination (JIS) L0805: 2005) is grade 4 or higher and / or when 0.2 ml of pure water is dropped, the water absorption time is 5 seconds or less, and the water absorption diffusion area after 1 minute is 10 cm ² or more. And a knitted fabric excellent in antifouling property that is not subjected to a hydrophilic treatment for introducing a hydrophilic group or a hydrophilic molecule into a cellulose molecule.

  In the third aspect, the present invention provides a woven fabric containing natural cellulose fibers, which has a resin content of 0.55% by mass or less and a pentosan content of 0.40% by mass or less and has excellent antifouling properties. .

  The present invention provides, in the fourth aspect, a knitted fabric containing natural cellulose fibers, which has a resin content of 0.55% by mass or less and a pentosan content of 0.40% by mass or less and has excellent antifouling properties. .

The fabric of the third gist preferably has a water absorption property such that when 0.2 ml of pure water is dropped, the water absorption time is 30 seconds or less and the water absorption diffusion area after 1 minute is 20 cm ² or more. In addition, the knitted fabric of the fourth gist also has water absorption such that when 0.2 ml of pure water is dropped, the water absorption time is 5 seconds or less and the water absorption diffusion area after 1 minute is 10 cm ² or more. preferable.

  In the woven fabrics according to the first and third aspects, the cover factor (woven fabric) is preferably 42 or less. In the fabrics of the second and fourth aspects, the cover factor (knitting) is preferably 2.2 or less.

  The present invention also provides a textile product formed from the woven fabric or knitted fabric according to the first to fourth aspects.

  The fabric or knitted fabric of the present invention exhibits an excellent antifouling effect against oily soils such as oleic acid, and also exhibits excellent sweat-absorbing quick-drying properties due to good water-absorbing diffusibility. Further, the fiber product of the present invention is formed from a woven fabric or a knitted fabric excellent in antifouling property, and thus exhibits an effect of expelling sebum stains that cause yellowing and darkening of the fiber product with a small amount of detergent.

  Below, this invention is demonstrated concretely for every item.

  Cellulose fibers used in the first and second aspects of the present invention include natural cellulose fibers such as cotton and hemp, and regenerated cellulose fibers such as rayon, polynosic, cupra, tencel, and lyocell. The cellulose fibers used in the third and fourth aspects of the present invention are natural cellulose fibers. In any of the gist, a woven fabric or a knitted fabric may be composed of only cellulose (or natural cellulose fiber), and a blended fiber obtained by combining two or more of them may be appropriately selected depending on the application. Alternatively, cellulose fibers and other fibers (for example, synthetic fibers) may be used in combination. In any of the gist of the present invention, the woven fabric and the knitted fabric preferably include cotton (cotton, cotton) as (natural) cellulose fibers, and more preferably is composed of only cotton.

  In any of the woven fabrics and knitted fabrics of the present invention, as long as they have antifouling properties and / or water absorbability described later, or have a resin content and pentosan below a predetermined amount, the type of yarn used, the yarn count, and the woven fabric The organization or the knitting organization is not particularly limited.

  In the first and second aspects of the present invention, antifouling property is specified when oleic acid used as a substitute for human secretion is used as an antifouling test solution. In the test, oleic acid is colored for easy determination. That is, oleic acid colored with an oil-soluble dye, such as red or yellow, is used as a test solution. Specifically, oleic acid containing 0.005% by mass of oil red is used. In the antifouling test, one drop of the above antifouling test solution was dropped on a woven fabric or knitted fabric and left for 1 hour, washed by 103 method (JIS L 0217: 1995), dried, and evaluated by gray scale judgment according to JIS L0805: 2005. To do.

  Both the woven fabric and the knitted fabric of the present invention have antifouling properties determined to be 4th or higher. This evaluation method will be described later. Thus, soil adhering to the fabrics and knitted fabrics of the present invention can be removed with a small amount of detergent (i.e., expelled or released from the fabric or fabric). (Also called “release”). For example, if the soil to be removed is oleic acid, the fabrics and knitted fabrics of the present invention can exhibit the same soil release properties as when laundered using a standard specified amount, even with no detergent. It can be dirty. In addition to oleic acid, antifouling test solutions such as sauce, mayonnaise, and chili oil can be used to evaluate the antifouling properties against oily stains. It can be used to evaluate the antifouling property against.

  In any of the gist of the present invention, the antifouling property is improved by utilizing the inherent water absorption of cellulose fibers. Therefore, the cellulose fibers constituting the woven fabric and knitted fabric of the present invention are subjected to a hydrophilic treatment in which a hydrophilic group or a hydrophilic molecule is introduced, such as modification of a part of the cellulose molecule or graft polymerization of the monomer to the cellulose molecule. It has not been. That is, for example, the raw cotton before spinning, the yarn before weaving or knitting, or the carboxymethylation degree (mol%) of the raw fabric or knitted fabric (also called raw machine) and the woven fabric or knitted fabric of the present invention. It can be confirmed by comparing it. If there is substantially no difference in the degree of carboxymethylation between the two (specifically, when the difference is less than 0.1 mol%), the fabric is subjected to a hydrophilization treatment that introduces at least a carboxymethyl group. It can be said that it is not. Similarly, the amount of other groups and molecules introduced to impart hydrophilicity (or proportions, polymerization rate, etc.), such as by comparing raw cotton, yarn or raw machinery with the product of the present invention. Presence or absence of a hydrophilic treatment can be confirmed.

  In general, cellulose fibers do not have hydrophilic polar groups such as carboxymethyl groups (including salts), amino groups, sulfone groups, and carboxyl groups (including salts) in cellulose molecules constituting the fibers. Or have a few polar groups. These groups are introduced into the cellulose molecule by the reaction of the OH groups of cellulose. Therefore, if the ratio of the number of these OH groups to the number of OH groups in the cellulose fiber constituting the product is assumed to be completely substituted, the presence or absence of the hydrophilic treatment can be roughly determined. . For example, the above-mentioned degree of carboxymethylation can be determined according to the procedure described in Patent Document 2, specifically, the following procedure. If the obtained degree of carboxymethylation is less than 0.3 mol%, it can be said that the sample has not been subjected to a hydrophilization treatment for introducing a carboxymethyl group.

<How to determine the degree of carboxymethylation (including carboxyl group)>
The sample was immersed in 0.3N hydrochloric acid for 1 hour under the conditions of a bath ratio of 1:50 and a liquid temperature of 20 ° C. to make all COO groups COOH groups, dehydrated and dried to remove residual HCl, and about 4 g Are sampled and weighed in absolute dry weight (W (g)). Next, the sample having been weighed in absolute dry weight was immersed in 50 mL (B (mL)) of a 0.1 N aqueous sodium hydroxide solution that had been precisely weighed and left overnight at a liquid temperature of 20 ° C., so that all COOH groups were COONa. Replace with. Further, in order to quantify Na used in the substitution, the liquid is titrated using 0.1N hydrochloric acid, and the titration value is set to X (mL). Phenolphthalein can be used as an indicator. The degree of carboxymethylation was determined from the absolute dry weight (W (g)) of the cellulose fiber, the volume of sodium hydroxide aqueous solution (B (mL)), and the volume of hydrochloric acid required for titration (X (mL)) as follows. Calculate according to the formula.
Degree of carboxymethylation (mol%) = 162.14 × (BX) ÷ [10000W−59.04 × (BX)] ÷ 3 × 100

  Alternatively, it can be said that utilization of the inherent water absorption of cellulose can be achieved by minimizing contaminants adhering to natural cellulose fibers. Contaminants adhering to the natural cellulose fiber are resin components such as lignin and pentosan (hemicellulose). The woven fabric and knitted fabric of the present invention are subjected to scouring (specifically, in the raw cotton state or at the yarn stage, or after the woven fabric or knitted fabric is produced, provided that the fiber performance is not significantly deteriorated. Is composed of natural cellulose fibers reduced as much as possible by treatment with alkali and / or hydrogen peroxide). This is specified in the third and fourth aspects of the present invention by the matter that “the resin content is 0.55 mass% or less and the pentosan is 0.40 mass% or less”.

  The ratio of the resin content in the cellulose fiber can be measured according to the resin content of the dissolving pulp test method (JIS P8011 5.11: 1976). The ratio of pentosan in the cellulose fiber can be measured according to Pentosan (JIS P8011 5.11: 1976) of the dissolving pulp test method. The specific measurement procedure by these test methods is as follows. When the resin content and the ratio of pentosan are determined by these test methods, the woven fabric, knitted fabric of the present invention or a product made of these is subjected to pretreatment as defined in JIS L1030-2: 2005 and processed after scouring treatment. Eliminate or reduce the effect of the drugs used in the above on the measurement results.

<Resin content test method>
1) Prepare for extraction.
The temperature of the water bath in the draft room is heated to about 90 ° C., and an extraction device and an extract are prepared.
2) Collect the test solution.
About 11 g of an air-dried sample cut to 1 × 1 is thoroughly filtered and placed in a Soxhlet extractor (sample collection amount Sg).
Separately, moisture is measured on about 3 g of the sample to obtain the absolute dry ratio, and the absolute dry amount of the sample is calculated (absolute dry ratio = P).
3) Extract the resin content.
i) Add 150-170 ml of extract (alcohol / benzene mixed solvent) to the extraction flask.
ii) Start extraction by attaching to the extraction device prepared in i) above.
iii) Extract for 6 hours.
The extraction rate is such that the extract is refluxed once every 10 minutes.
4) End extraction.
i) Remove the extraction tube, and collect the extract remaining in the tube in a beaker (2 L).
ii) Attach the extraction tube and the extraction flask again and warm them, and evaporate until about half of the flask extract remains in the extraction tube.
iii) Remove the extraction tube, and collect the residual extract in the tube in the beaker (2L) of i). (Reuse as fresh extract)
5) Volatilize the extract.
The extraction flask is heated in a water bath with the extraction tube removed, and the extract is volatilized until it reaches about 10 ml.
6) Transfer the extract to a weighing tube.
i) While filtering the residual liquid of the extraction flask through a glass filter (26-2), transfer it to a weighing tube of known weight.
ii) Pour fresh extract into the extraction flask with Komagome pipette (10 ml) and rinse the inner wall of the flask to match the liquid in the weighing tube.
iii) Repeat ii) once more.
7) Volatilize the liquid in the weighing tube.
The weighing tube is heated in a water bath to completely evaporate the extract.
8) Dry and weigh.
Dry at 110 ° C. for about 1 hour, allow to cool in a desiccator, and weigh. (Extraction amount = Wg)
9) Calculate according to the following formula and report to 2 decimal places.
Resin content (mass%) = (W × 100) ÷ (S × P)

<Pentosan test method>
1) Concentrate about 1 g of air-dried sample as the absolute dry amount and transfer it to a distillation flask.
2) Add 100 ml of 12% hydrochloric acid.
3) After winding asbestos from the liquid level of the flask to the neck, place it on the flask heater and contact with the hydrochloric acid dropping funnel, condenser, receiver, etc.
4) Distill. Heating is adjusted so that a distillate can be obtained at 30 ml for 10 minutes, and hydrochloric acid is continuously dropped from the upper funnel so as to keep the amount of liquid in the flask constant. Distillation is stopped if 300 ml of distillate is obtained after 100 minutes.
5) Take a predetermined amount (Aml) with a pipette from 300ml of distillate, and transfer to a 100ml full volume flask containing 20ml of distilled water in advance.
6) Add 1 drop of phenolphthalein solution and neutralize with sodium hydroxide solution while cooling the whole flask.
7) Add 20 ml of stabilizer solution and shake, add 25 ml of aniline acetate solution, and immediately add distilled water to 100 ml and mix well.
8) Transfer this solution to 100 ml of a dark Erlenmeyer flask, add the aniline acetate solution in a constant temperature bath at 25.0 ± 0.5 ° C., and leave it exactly for 50 minutes.
9) After 50 minutes, the absorbance of the solution is measured using a photoelectric colorimeter.
10) Obtain the furafur concentration using a separately obtained calibration curve (using the furafur standard solution).
11) Pentosan (mass%) P is calculated by the following formula.
P = [(C × 46.9) / (S × R × A)] × 100
A: predetermined amount of distillate, C: furafur concentration (mg / ml), S: sample (g), R: absolute dry ratio

The woven fabric and knitted fabric of the present invention have a high water absorption property of the fiber itself, and also have a good water absorption / diffusion performance, and therefore also have a good sweat absorption and quick drying property. Here, the water absorption / diffusion performance is evaluated by the water absorption time and the water absorption / diffusion area for water absorption when 0.2 ml of pure water is dropped. That is, the fabric of the present invention can have water absorbency such that when 0.2 ml of pure water is dropped, the water absorption time is 30 seconds or less and the water absorption diffusion area after 1 minute is 20 cm ² or more. In addition, the knitted fabric of the present invention can have water absorption such that when 0.2 ml of pure water is dropped, the water absorption time is 5 seconds or less and the water absorption diffusion area after 1 minute is 10 cm ² or more. The knitted fabrics according to the second and fourth aspects of the present invention preferably have a water absorption time of 3 seconds or less and a water absorption diffusion area after 1 minute of 20 cm ² or more. A method for measuring the water absorption time and the water absorption diffusion area will be described later.

  The fabric or knitted fabric excellent in antifouling property of the present invention is prepared by dyeing processing after creating a woven fabric or knitted fabric in consideration of raw cotton, raw yarn, weaving (knitting), components of processing agents used in all processing steps, etc. Considering the treatment time of pretreatment (for example, scouring treatment), the type and concentration of the treatment agent, the treatment time, the bath ratio, etc., the scouring effect is increased by 1.5 to 3 times or more, and the cellulose fiber to be processed Depending on the type and mixing ratio, it is obtained by carrying out until the water absorption time and the water absorption diffusion area are reached. Alternatively, the fabric or knitted fabric excellent in antifouling property of the present invention excludes foreign matters so that the above water absorption time and water absorption diffusion area can be achieved after forming the woven fabric or knitted fabric at the raw cotton or yarn stage. It is obtained by processing. For example, when performing a two-stage scouring bleaching process using a liquid dyeing machine, both the first stage and the second stage have a concentration of NaOH equal to or higher than that normally used for the target fabric, each at 90 ° C. or higher, and 40 It is obtained by processing for more than a minute. Ordinary scouring bleaching treatment may be carried out three times or more. By performing such a treatment, the impurities contained in the woven or knitted fabric are more thoroughly eliminated, and the water absorption function that the cellulose fiber itself has (or inherently) is developed to prevent It is considered that the soiling property is improved and excellent sweat perspiration quick-drying property is obtained. In order to maintain and exhibit the original water absorption and antifouling properties of cellulose, it is important not to leave the impurities removed in the pretreatment in order to maintain and exhibit the antifouling properties.

  Furthermore, it is necessary to maintain the state of the woven fabric and the knitted fabric after the pretreatment (that is, a state in which impurities are removed) in all the subsequent steps. Therefore, it is preferable to avoid remaining in the woven fabrics and knitted fabrics of treatment agents or components that exhibit a behavior that inhibits antifouling properties similar to foreign matters. Usually, the cationic component often used in the finishing process of woven fabrics and knitted fabrics remains in the woven fabrics and knitted fabrics and inhibits the water absorption of cellulose fibers, so that its use is not preferred. Here, as the cationic component, for example, aminosilicone softener can be mentioned. The woven fabric and knitted fabric of the present invention are preferably subjected to a finishing treatment by selecting a chemical that gives a desired texture and does not inhibit the water absorption of cellulose fibers. Thereby, the water-absorbing and diffusing performance brought about by the inherent water absorption of the cellulose fiber, and thus the antifouling property is maintained. Specifically, for example, as the finishing agent, nonionic and anionic materials that do not inhibit water absorption and antifouling properties, including special fatty acids and polyesters, are preferably used.

  As described above, the excellent antifouling property of the woven fabric and knitted fabric of the present invention can be obtained by maintaining the state in which the contaminants are excluded and the method for eliminating the contaminants so as to utilize the water absorption inherent in the cellulose fiber. . Therefore, even if the woven fabric and knitted fabric of the present invention are repeatedly washed, the excellent antifouling property does not deteriorate. This is because, by repeating the washing, impurities that are estimated to inhibit water absorption are further eliminated. Therefore, the woven fabric and knitted fabric of the present invention are provided on the condition that the detergent (when the softening treatment agent is used after the laundering treatment, further prevents the water absorbing component from adhering to the woven fabric and knitted fabric). Exerts an antifouling effect excellent in washing durability.

  The woven fabric and knitted fabric of the present invention exhibit excellent antifouling properties due to the excellent water absorption of the fibers themselves even when dirt adheres. This antifouling property becomes higher by setting the cover factor of the woven fabric or knitted fabric to a predetermined value or less. Specifically, in the woven fabric according to the first and third aspects of the present invention, the cover factor (woven) is preferably 42 or less, and in the knitted fabric according to the second and fourth aspects of the present invention, The cover factor (knitting) is preferably 2.2 or less. Since the calculation formulas for woven fabrics and knitted fabrics are different, they are written as a cover factor (woven fabric) and a cover factor (knitted fabric) for distinction.

The cover factor (weave) is a factor indicating how much yarn covers the area of the fabric, and is calculated by the following equation.
Cover factor (woven) = n1 / (N1) ^1/2 + n2 / (N2) ^1/2
In the formula, the meaning of each symbol is as follows.
n1: Warp density per 2.54 cm,
n2: Weft density per 2.54 cm,
N1: Warp count (English cotton count),
N2: Weft count (English cotton count)
In this specification, unless otherwise specified, the cover factor (woven) (knitting) refers to the woven fabric and knitted fabric after finishing all finishing treatments (including scouring, bleaching, dyeing, and soft finishing). Represents the measured value.

  When the cover factor (weave) exceeds 42, it becomes difficult to obtain a higher antifouling effect in the woven fabric. If the cover factor (weave) exceeds 42, it can be presumed that the attached dirt becomes difficult to be replaced with water, and it is difficult to expel the dirt component by standing water. A preferable cover factor (woven fabric) is 32 or less and 7 or more in the case of a plain fabric. In the case of multiple woven fabrics, the cover factor (woven fabric) having the largest numerical value among the constituent woven fabrics may be 42 or less.

The cover factor (knitting) is a numerical value used to represent the ratio of the area covered by the yarn surface to the area occupied by one loop, and is calculated by the following formula.
Cover factor (edition) = 1 / (l × S ^1/2 ),
In the formula, the meaning of each symbol is as follows.
l: loop length (inch),
S: Eyelash type count

  When the cover factor (knitting) exceeds 2.2, it becomes difficult to obtain a higher level of antifouling effect in the knitted fabric. If the cover factor (knitting) exceeds 2.2, it can be presumed that the attached dirt becomes difficult to be replaced with water, and it becomes difficult to expel the dirt component by standing water. A preferable cover factor (edition) is 1.2 or less and 0.8 or more in the case of Tendon. In the case of multiple knitted fabrics, the cover factor (knitting) of the knitted fabric having the largest numerical value among the knitted fabrics may be 2.2 or less.

  When the woven fabric and knitted fabric of the present invention each have a cover factor equal to or less than the predetermined value, the release of the antifouling test solution can be started within a relatively short time by simply immersing the woven fabric and the knitted fabric in water. (That is, the adhered dirt is replaced with water and released into water). Therefore, when the woven fabric or the knitted fabric of the present invention is configured to have a small cover factor value, dirt attached to them can be driven out with a smaller amount of detergent or without using detergent. For example, even when a woven fabric or a knitted fabric having a cover factor equal to or less than the predetermined value is washed with the detergent usage reduced to 1/2 of the standard designation, the woven fabric and the knitted fabric are washed with the detergent usage amount designated as the standard designation. It exhibits the same soil release properties as the case and exhibits an excellent antifouling effect. The same applies to fiber products made from these materials.

  The woven fabric and knitted fabric of the present invention are used as a raw material for textile products in the same manner as ordinary woven fabrics and knitted fabrics to give textile products. Specifically, various textile products such as clothing such as underwear, underwear, pajamas, shirts, sweaters, and vests, sheets, covers, tablecloths, handkerchiefs, towels, and the like are provided. Further, by applying the present invention, a nonwoven fabric excellent in antifouling property and a fiber product using the same can be obtained. A nonwoven fabric excellent in antifouling properties can be obtained by performing a process of removing impurities at the raw cotton stage or after the nonwoven fabric is produced.

Hereinafter, the present invention will be described by way of examples, but the present invention is not limited thereto.
The evaluation method of antifouling property (gray scale) and water absorption (water absorption time, water absorption diffusion area) employed in the examples will be described below.

1. Gray scale judgment and evaluation A grade judgment was performed with a gray scale for dyeing fastness test.
Specifically, one drop (0.03 ml) of oleic acid is dropped onto a woven or knitted fabric with a spoid, left for 1 hour, washed with water in accordance with the 103 method (JIS L 0217: 1995), dried, and then JIS According to L0805: 2005, the grade was determined on a gray scale for dyeing fastness test. The judgment is performed by subdividing the five stages into nine stages, and the fifth grade indicates that there is no contamination residue and is good, and the first grade indicates that there is a significant contamination residue. The applicant has determined that grade 4 or higher is acceptable (a level that can sufficiently withstand practical use).

2. Water absorption time As the water absorption time, when 0.2 ml of pure water was dropped on the surface of the woven fabric or knitted fabric, the time until it completely penetrated was measured. The applicant has determined that 30 seconds or less for woven fabrics and 5 seconds or less for knitted fabrics are acceptable (a level that can sufficiently withstand practical use).

3. Water-absorbing diffusion area The water-absorbing diffusion area was determined by measuring the wet spread area (vertical x horizontal) 1 minute after dropping 0.2 ml of the test liquid on the surface of the woven fabric or knitted fabric. The applicant has determined that 20 cm ² or more for woven fabrics and 10 cm ² or more for knitted fabrics are acceptable (a level that can sufficiently withstand practical use).

4). Dirt release property Dirt release property was measured when a soiled sample was placed in water (still in water (vertical) method). Specifically, one drop (0.03 ml) of oleic acid was dropped, and after infiltration (knitting: 30 seconds, fabric: 60 seconds), it was put into water vertically, and the sample in water was observed for 5 minutes to release dirt. The property (degree of soiling) was judged. Judgment criteria are as follows.
1 Most of the dirt does not rise.
2 Dirt rises about 1/4 3 Dirt rises about 1/2 4 Dirt rises about 3/4 5 Dirt rises mostly Applicant adopts the dirt release property as a simple evaluation to judge the level of antifouling property 3 or more are judged to have a high level of antifouling properties.

Example 1
A plain woven fabric (100% cotton) with warp, weft count 30S, warp and weft total density of 160 / 2.54 cm was prepared. After the hair was burned, it was treated with a bath solution containing 30% NaOH 30 cc / L (bath ratio 1:30) at 100 ° C. for 40 minutes, and further treated with a bath solution containing 30% NaOH 10 cc / L (bath Ratio 1:30) The treatment was carried out at 100 ° C. for 60 minutes. Then, light color reactive dyeing was performed, and soft finishing was performed using DS-357 (manufactured by Special Fatty Acid Softener TS Chemical Co.) at a concentration of 3% as a softening finish. In the woven fabric after the finishing treatment, the cover factor (woven fabric) was 29.2.

(Comparative Example 1)
The same fabric as that used in Example 1 was used, and after sintering, after desizing under the usual conditions, scouring bleaching was performed once. Thereafter, light reaction dyeing was performed, and a normal soft finish was performed. The cover factor (woven fabric) after the finishing treatment was 29.2.

(Example 2)
A warp, weft count 60S, warp, weft fabric with a total density of 330 / 2.54 cm satin fabric (100% cotton) was prepared. This was processed under the same conditions as in Example 1. The cover factor (woven fabric) after the finishing treatment was 42.6.

  Table 1 shows the results of water absorption time, water absorption diffusion area, and release property of the obtained fabric.

  Table 2 shows the evaluation results of the antifouling properties of the obtained woven fabric.

  According to the results in Table 2, the woven fabric of Example 1 had a gray scale of 4th grade or higher after water washing with respect to all the test solutions, and the antifouling property passed. In the woven fabric of Comparative Example 1, the gray scale after water washing was not at an acceptable level for all the test solutions.

The fabric of Example 1 is superior to the fabric of Comparative Example 1 in antifouling properties before washing. This is because, as can be seen from the water absorption time and the water absorption / diffusion area of Example 1, the fabric of Example 1 has good water absorption / diffusion performance. In the fabric of Example 2, the gray scale after water washing was grade 4 or higher for all the test solutions, and the antifouling property was acceptable. However, the soil release property was lower than that of Example 1. This is considered due to the fact that the cover factor (woven fabric) of Example 2 is higher than that of Example 1.
The fabric obtained in Example 1 was sewn into men's underwear and worn by five men in the 30 to 40 years range for 24 hours, and then washed and found to have excellent antifouling properties. I got the impression that you are doing.

(Example 3)
A 40 sheet knitted fabric (100% cotton) was prepared and subjected to scouring and bleaching 3 times (bath ratio 1:15) using the conditions employed in a conventional manner. Thereafter, reactive dyeing was performed, and DS-357 (special fatty acid softener, manufactured by TS Chemical Co., Ltd.) was used at a concentration of 3% to carry out a soft finishing treatment. In the knitted fabric after the finishing treatment, the cover factor (knitting) was 1.40. Moreover, the carboxymethylation degree of Example 3 was 0.14 mol%, the resin content was 0.48 mass%, and pentosan was 0.31 mass%. Moreover, in the knitted fabric (green machine) before scouring bleaching, the resin content was 1.2% by mass, and pentosan was 0.56% by mass. The method for obtaining the degree of carboxymethylation and the proportions of resin and pentosan is as described above.

(Comparative Example 2)
Using the same knitted fabric as that used in Example 3, scouring bleaching was performed once. Thereafter, light reaction dyeing was performed, and a normal soft finish was performed. The cover factor (knitting) after the finishing treatment was 1.40. In Comparative Example 2, the degree of carboxymethylation was 0.17 mol%, the resin content was 0.73% by mass, and pentosan was 0.54 mass%.

Example 4
Forty smooth (100% cotton) was prepared and subjected to scouring bleaching, reactive dyeing and soft finishing under the same conditions as in Example 2. In the knitted fabric after the finishing treatment, the cover factor (knitting) was 2.25.

  Table 3 shows the water absorption time, water absorption diffusion area, and releaseability evaluation results of the obtained knitted fabric.

  Table 4 shows the evaluation results of the antifouling property of oleic acid of the obtained knitted fabric. In addition, the evaluation result when the amount of detergent used is zero is also shown.

  As is apparent from Table 4, the knitted fabrics of Examples 3 and 4 had an acceptable level of antifouling property after water washing for oleic acid. The knitted fabric of Comparative Example 2 had a low water absorption, and its antifouling property did not reach an acceptable level. This is presumably because the amount of impurities removed was small because the number of scouring bleaching was small. The knitted fabric of Example 4 had a lower soil release property than that of Example 3. This is presumably because the cover factor (knitting) of the knitted fabric of Example 4 was larger than that of Example 3. The knitted fabric of Example 3 was sewn into a men's underwear, and 5 men in the 30 to 40 years old wore it for 24 hours. After that, they had excellent antifouling properties. I got an impression.

  The woven fabric and knitted fabric of the present invention can easily remove sebum stains and other oil stains by washing, and can absorb absorbed water over a wide area, and is excellent in sweat-absorbing and quick-drying properties. It is useful for constructing textiles such as clothing, household goods, and bedding covers.

Claims (9)

A woven fabric containing cellulose fibers, which is allowed to stand for 1 hour after dropping one drop of oleic acid, and has a gray scale determination (JIS L0805: 2005) of Grade 4 or higher after 103 methods (JIS L 0217: 1995) washing and drying. And / or when 0.2 ml of pure water is dropped, the water absorption time is 30 seconds or less and the water absorption diffusion area after 1 minute is 20 cm ² or more,
In addition, a woven fabric excellent in antifouling property which is not subjected to a hydrophilic treatment for introducing a hydrophilic group or a hydrophilic molecule into a cellulose molecule. A knitted fabric containing cellulose fibers, which is allowed to stand for 1 hour after dropping a drop of oleic acid, and has a gray scale determination (JIS L0805: 2005) of No. 103 (JIS L 0217: 1995) that is 4th grade or higher. And / or when 0.2 ml of pure water is dropped, the water absorption time is 5 seconds or less, and the water absorption diffusion area after 1 minute is 10 cm ² or more.
In addition, a knitted fabric excellent in antifouling property that is not subjected to a hydrophilic treatment for introducing a hydrophilic group or a hydrophilic molecule into a cellulose molecule. A woven fabric containing natural cellulose fibers, having a resin content of 0.55% by mass or less and pentosan of 0.40% by mass or less and having excellent antifouling properties. A knitted fabric containing natural cellulose fibers, which has a resin content of 0.55% by mass or less and pentosan of 0.40% by mass or less and has excellent antifouling properties. The fabric with excellent antifouling property according to claim 3, wherein the water absorption when 0.2 ml of pure water is dropped is a water absorption time of 30 seconds or less and the water absorption diffusion area after 1 minute is 20 cm ² or more. The knitted fabric excellent in antifouling property according to claim 4, wherein when 0.2 ml of pure water is dropped, the water absorption is 5 seconds or less and the water absorption diffusion area after 1 minute is 10 cm ² or more. The woven fabric excellent in antifouling property according to any one of claims 1, 3, and 5, wherein the cover factor (weave) is 42 or less. The knitted fabric excellent in antifouling property according to claim 2, wherein the cover factor (knitting) is 2.2 or less. A textile product formed from a woven or knitted fabric excellent in antifouling property according to any one of claims 1 to 8.