JP4571566B2 - Method for producing fabric capable of adsorbing odor - Google Patents

Method for producing fabric capable of adsorbing odor Download PDF

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JP4571566B2
JP4571566B2 JP2005283967A JP2005283967A JP4571566B2 JP 4571566 B2 JP4571566 B2 JP 4571566B2 JP 2005283967 A JP2005283967 A JP 2005283967A JP 2005283967 A JP2005283967 A JP 2005283967A JP 4571566 B2 JP4571566 B2 JP 4571566B2
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island
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JP2007092236A (en
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みゆき 沼田
謙吾 田中
三枝 神山
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帝人ファイバー株式会社
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  The present invention includes a polyester multifilament yarn having a single fiber diameter of 10 to 1000 nm, has excellent adsorptivity to odors containing components of an alkaline gas such as ammonia, and an acidic gas such as hydrogen sulfide and acetic acid, and is flexible. The present invention relates to a fabric capable of adsorbing acidic and alkaline odors excellent in form stability, a method for producing the same, and a textile product.

  With the diversification of living environments aimed at comfortable living, human interest in odors has increased greatly. Under such circumstances, in order to remove malodor from the fiber structure, a fiber raw material mainly composed of a thermoplastic polymer compound having fiber-forming ability and an adsorbent that adsorbs odor is melt-spun (for example, a patent Document 1), those obtained by applying a deodorant to the fiber structure by post-processing (for example, Patent Document 2), and those using porous activated carbon fibers (for example, Patent Document 3) have been proposed. .

  However, in the method of melt spinning the fiber raw material mainly composed of the thermoplastic polymer having the fiber forming ability and the adsorbent that adsorbs the odor, it has excellent durability without impairing the soft texture. Although deodorant properties can be obtained, there are problems such as the thermal stability of the adsorbent that adsorbs odors in the spinning process. In the deodorization process by post-processing, when attaching a deodorizer to a fiber structure, since binder resin is normally used, there existed a problem that the texture of a fiber structure became hard with this binder resin. Moreover, in what used the porous activated carbon fiber, although it was excellent in the adsorptivity of an odor by the high specific surface area, there existed a problem that a use form had a restriction | limiting and a shape was easy to collapse during use.

  By the way, as a method for ultrafine fibers, many techniques for producing ultrafine fibers by sea island type composite spinning method, electrospinning, and the like have been proposed. As a sea-island type composite spinning method, a method of obtaining ultrafine fibers from fibers obtained by blending sea-island polymers in a chip state has been proposed (see, for example, Patent Document 4). However, the ultrafine fiber made from the sea-island type composite fiber obtained by this method has a large variation in fiber diameter and has a problem in quality stability. In addition, the single fiber fineness of the ultrafine fiber obtained by this method is 0.04 dtex (about 2 μm), which is insufficient to obtain the target adsorptive odor gas.

On the other hand, the electrospinning technology is a technology that has recently attracted attention, and is a technology that can produce a nonwoven fabric having a fiber diameter of several tens of nanometers. In this method, a high voltage is applied between the tip of the nozzle containing the polymer solution and the substrate, and the charged polymer solution is ejected and accumulated on the substrate (see, for example, Patent Document 5). However, the shape of fibers and fiber products obtained by the electrospinning technique is limited to nonwoven fabrics, and the fiber diameters of the produced nonwoven fabrics vary considerably. In addition, the toughness was very weak compared to ordinary fibers, and there were limitations in practical use.
In addition, in the Japanese Patent Application No. 2004-98392, the present inventors proposed a sea-island type composite fiber having a fiber diameter of several tens of nanometers and a method for manufacturing the same.

JP-A-5-222614 JP-A-10-102379 JP 10-76250 A JP-A-4-126815 JP 2004-68161 A

  The present invention has been made in view of the above background, and its object is to provide a fabric having excellent odor adsorbability, capable of adsorbing an acidic and alkaline odor that is flexible and excellent in form stability, and a method for producing the same and fiber. To provide products.

  As a result of intensive studies to achieve the above-mentioned problems, the present inventors have achieved excellent odor adsorption by using a polyester multifilament yarn having a single fiber diameter of 10 to 1000 nm to form a fabric having a predetermined basis weight. It has been found that a fabric capable of adsorbing an acidic and alkaline odor that is flexible, flexible and excellent in form stability can be obtained, and has been intensively studied to complete the present invention.

Thus, according to the present invention, “ a method for producing a fabric capable of adsorbing a odor that includes a polyester multifilament yarn having a single fiber diameter of 10 to 1000 nm and a basis weight within a range of 30 to 300 g / m 2 ,” , Using a sea-island type composite fiber in which the island component is made of polyester and the diameter of the island component is 10 to 1000 nm, and the dissolution rate ratio (sea / island) between the sea component polymer and the island component polymer is 200 or more. After obtaining, the sea component of the sea-island type composite fiber is dissolved and removed with an alkaline aqueous solution, and then the fabric is subjected to a hydrophilic treatment so that the basis weight is within a range of 30 to 300 g / m 2. Is provided. ”.

At that time, the number of islands is preferably 100 or more. In the sea-island composite fiber, the sea component is polylactic acid, an ultrahigh molecular weight polyalkylene oxide condensation polymer, a polyethylene glycol compound copolymer polyester, and a copolymer of a polyethylene glycol compound and 5-sodium sulfoisophthalic acid. It is preferably at least one kind of aqueous alkaline solution-soluble polymer selected from polyester. In particular, the sea component is preferably polyethylene terephthalate obtained by copolymerizing 6 to 12 mol% of 5-sodium sulfonic acid and 3 to 10 wt% of polyethylene glycol having a molecular weight of 4000 to 12000. Also, an easily soluble component and a hardly soluble component having a melt viscosity lower than that of the easily soluble component are melted and extruded using the former as a sea component and the latter as an island component, and as a sea-island type composite undrawn yarn at a spinning speed of 400 to 6000 m / min. It is preferable to fabricate the sea-island type composite undrawn yarn by orientation crystallization and drawing at a temperature of 60 to 220 ° C. and then using the drawn yarn. The melt viscosity ratio (sea / island) of the sea component and the island component at the melt spinning temperature is preferably 1.1 to 2.0. Further, a polymer having a glass transition temperature of 100 ° C. or lower is used as the sea component and the island component, and the sea-island type composite unstretched yarn is subjected to a liquid at 60 to 100 ° C. prior to orientation crystallization stretching of the sea-island type composite unstretched yarn. It is preferable to include a step of stretching at a stretching ratio of 10 to 30 times and a stretching speed of 300 m / min or less while being immersed in a bath. In the above-mentioned sea-island type composite fiber , it is preferable that the island diameter (r) and the sea thickness (S) between the islands, the fiber diameter (R) and the maximum thickness (Sm) of the sea part satisfy the following relational expressions.
0.001 ≦ S / r ≦ 0.5
Sm / R ≦ 0.15
Here, r is the island diameter, and S is the thickness of the sea part between the islands. Sm is in the center of the fiber
The thickness of the thickest sea part, excluding existing sea parts.

  ADVANTAGE OF THE INVENTION According to this invention, the cloth which has the outstanding odor adsorptivity, can adsorb | suck the acidic and alkaline odor which was flexible and excellent in form stability, its manufacturing method, and a textile product are obtained.

Hereinafter, embodiments of the present invention will be described in detail.
First, it is important that the fabric of the present invention contains a polyester multifilament yarn having a single fiber diameter (single fiber diameter) of 10 to 1000 nm (preferably 100 to 800 nm). When this single fiber diameter is converted into a single yarn fineness, it corresponds to 0.000001 to 0.01 dtex. In general, it is effective to increase the specific surface area as much as possible in order to increase the odor adsorbability. The polyester multifilament yarn having such a single fiber diameter is included in the fabric, so that the specific surface area increases dramatically. Adsorbability for odorous gas is dramatically improved. Here, when the single fiber diameter is less than 10 nm, the fiber strength is lowered, which is not preferable for practical use. On the other hand, when the single fiber diameter exceeds 1000 nm, the specific surface area of the fabric is lowered, and the odor adsorptivity is insufficient, which is not preferable. Here, when the cross-sectional shape of the single fiber is an atypical cross section other than the round cross section, the diameter converted to the round cross section is defined as the single fiber diameter. The single fiber diameter can be measured by photographing the cross section of the fiber with a transmission electron microscope.

  In such a polyester multifilament yarn, the number of filaments is not particularly limited, but is preferably 500 or more (more preferably 2000 to 8000) in terms of the odor adsorptivity of the fabric. The total fineness of the polyester multifilament yarn (the product of the single fiber fineness and the number of filaments) is preferably in the range of 5 to 150 dtex.

Preferred examples of the polymer that forms such a polyester multifilament yarn include polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate, polylactic acid, polyester obtained by copolymerization of a third component, and the like. In the polymer, a fine pore forming agent, a cationic dye dyeing agent, an anti-coloring agent, a heat stabilizer, a fluorescent whitening agent, a matting agent, a coloring agent may be added as necessary within the range not impairing the object of the present invention. 1 type (s) or 2 or more types of an agent, a hygroscopic agent, and inorganic fine particles may be contained.
The fiber form of the polyester multifilament yarn is not particularly limited, and normal air processing and false twist crimping may be applied.

Moreover, it is preferable that the toughness of the polyester multifilament yarn is 20 or more (more preferably 25 to 40). However, toughness is calculated from the following equation.
Toughness = strength (g / dtex) × (elongation (%)) 1/2

In the fabric of the present invention, it is important that the basis weight is 30 to 300 g / m 2 . When the basis weight is less than 30 g / m 2 , sufficient odor adsorptivity cannot be obtained, and when the basis weight is greater than 300 g / m 2, flexibility is impaired.

In the fabric of the present invention, the form of the structure is not particularly limited, and may be a woven fabric or a knitted fabric.
In the case of a woven fabric, the structure is not particularly limited and may be woven by a normal method. For example, weaving structures include plain weave, oblique weaving, satin weaving, etc., changing structure, changing weaving, etc., changing double weaving, weft double weaving, etc. Examples are velvet. The number of layers may be a single layer or a multilayer of two or more layers.
In the case of a knitted fabric, a weft knitted fabric or a newly knitted fabric may be used. Preferred examples of the weft knitting structure include flat knitting, rubber knitting, double-sided knitting, pearl knitting, tuck knitting, float knitting, one-sided knitting, lace knitting, bristle knitting, and the like. Single atlas knitting, double cord knitting, half tricot knitting, back hair knitting, jacquard knitting and the like are exemplified. The number of layers may be a single layer or a multilayer of two or more layers.

The fabric of the present invention can be produced by the following production method. That is, after producing a polyester fabric having a basis weight of 30 to 300 g / m 2 using a sea-island type composite fiber in which the island component is made of polyester and the island component has a diameter of 10 to 1000 nm, the sea-island type composite fiber is prepared. By dissolving and removing the sea component with an aqueous alkaline solution, a fabric capable of adsorbing the acidic and alkaline odors can be produced.

  Here, in the above-mentioned sea-island type composite fiber, the polymer constituting the fiber is arbitrary as long as the sea component polymer is a combination having higher solubility than the island component polymer. In particular, the dissolution rate ratio (sea / island) Is preferably 200 or more. When the dissolution rate ratio is less than 200, part of the island component of the fiber cross-section surface layer portion is dissolved while the sea component of the fiber cross-section central portion is dissolved, so the sea component is completely dissolved and removed. For this reason, the island component is reduced by a percentage, and strength deterioration due to the thickness variation of the island component and solvent erosion occurs, and problems such as fluff and pilling are likely to occur.

  The sea component polymer may be any polymer as long as the dissolution rate ratio with respect to the island component is 200 or more, but polyesters, polyamides, polystyrenes, polyethylenes, and the like having good fiber forming properties are particularly preferable. For example, as an easily soluble polymer in an alkaline aqueous solution, polylactic acid, an ultra-high molecular weight polyalkylene oxide condensation polymer, a polyethylene glycol compound copolymer polyester, a copolymer polyester of polyethylene glycol compound and 5-sodium sulfonic acid isophthalic acid may be used. Is preferred. Nylon 6 is soluble in formic acid, and polystyrene and polyethylene are very well soluble in organic solvents such as toluene. Among them, in order to achieve both easy alkali solubility and sea-island cross-section formability, the polyester-based polymer is 3 to 10% by weight of polyethylene glycol having 6 to 12 mol% of 5-sodium sulfoisophthalic acid and a molecular weight of 4000 to 12000. % Copolymerized polyethylene terephthalate copolymer polyester having an intrinsic viscosity of 0.4 to 0.6 is preferred. Here, 5-sodium isophthalic acid contributes to improving hydrophilicity and melt viscosity, and polyethylene glycol (PEG) improves hydrophilicity. PEG has a higher hydrophilicity effect, which is thought to be due to its higher order structure, as the molecular weight increases, but it is preferable from the viewpoints of heat resistance and spinning stability because the reactivity becomes poor and a blend system is formed. Disappear. On the other hand, when the copolymerization amount is 10% by weight or more, it is difficult to achieve the object of the present invention because of its inherently low melt viscosity. Therefore, it is preferable to copolymerize both components within the above range.

  On the other hand, the island component polymer may be any polyester polymer as long as there is a difference in dissolution rate from the sea component, but as described above, fiber-forming polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate, polylactic acid, Polyester such as polyester copolymerized with the third component is preferred. In the polymer, a fine pore forming agent, a cationic dye dyeing agent, an anti-coloring agent, a heat stabilizer, a fluorescent whitening agent, a matting agent, a coloring agent may be added as necessary within the range not impairing the object of the present invention. 1 type (s) or 2 or more types of an agent, a hygroscopic agent, and inorganic fine particles may be contained.

  In the sea-island type composite fiber of the present invention comprising the sea component polymer and the island component polymer, the melt viscosity of the sea component during melt spinning is preferably larger than the melt viscosity of the island component polymer. In such a relationship, even if the composite weight ratio of the sea component is less than 40%, the islands are joined together, or the majority of the island components are joined to be different from the sea-island type composite fiber. hard.

  A preferred melt viscosity ratio (sea / island) is in the range of 1.1 to 2.0, especially 1.3 to 1.5. If this ratio is less than 1.1 times, the island components are likely to be joined during melt spinning, while if it exceeds 2.0 times, the viscosity difference is too large and the spinning tone tends to decrease.

  Next, the larger the number of islands, the higher the productivity when producing ultrafine fibers by dissolving and removing sea components, and the fineness of the resulting ultrafine fibers becomes remarkable, and the softness and smoothness unique to ultrafine fibers It is preferable that it is 100 or more (more preferably 300 to 1000) from the viewpoint of odor adsorption when it is made into a fabric. Here, when the number of islands is less than 100, even if the sea component is dissolved and removed, a high multifilament yarn composed of a single yarn having a very fineness cannot be obtained, and the object of the present invention cannot be achieved. If the number of islands is too large, not only the manufacturing cost of the spinneret increases, but also the processing accuracy itself tends to decrease.

  Next, the diameter of the island component needs to be in the range of 10 to 1000 nm. When the diameter is less than 10 nm, the fiber structure itself is unstable and the physical properties and fiber form are unstable, which is not preferable. On the other hand, when the diameter exceeds 1000 nm, the softness and texture peculiar to ultrafine fibers cannot be obtained, and the fabric This is not preferable because the odor adsorbability is insufficient. Further, each island in the cross section of the sea-island composite fiber is more preferable as the diameter thereof is uniform because the quality and durability of the fabric made of ultrafine multifilament yarn obtained by removing sea components is improved.

  In the sea-island composite fiber, the sea-island composite weight ratio (sea: island) is preferably in the range of 40:60 to 5:95, and particularly preferably in the range of 30:70 to 10:90. Within such a range, the thickness of the sea component between the islands can be reduced, the sea component can be easily dissolved and removed, and the conversion of the island component into ultrafine fibers is facilitated. Here, when the proportion of the sea component exceeds 40%, the thickness of the sea component becomes too thick. On the other hand, when the proportion is less than 5%, the amount of the sea component becomes too small, and joining between the islands easily occurs.

  In the above-mentioned sea-island type composite fiber, the thickness of the sea component between the islands is suitably 500 nm or less, particularly in the range of 20 to 200 nm. When the thickness exceeds 500 nm, the thick sea component is dissolved and removed. As the dissolution of the components progresses, not only the homogeneity between the island components decreases, but defects and dyeing spots such as fuzz and pilling are likely to occur.

Furthermore, in the sea-island type composite fiber, when the island diameter (r) and the sea thickness (S) between the islands, and the fiber diameter (R) and the maximum thickness (Sm) of the sea part satisfy the following relational expressions, Toughness is easily obtained and preferable.
0.001 ≦ S / r ≦ 0.5
Sm / R ≦ 0.15
Here, r is the island diameter, and S is the thickness of the sea part between the islands. Moreover, Sm is the thickness of the thickest sea part except the sea part which exists in a fiber center part. More preferably, 0.01 ≦ S / r ≦ 0.3 and Sm / R ≦ 0.08 in order to obtain high strength. Here, when the S / r value is 0.5 or more, or the Sm / R value is 0.15 or more, the high-speed spinnability deteriorates and the draw ratio cannot be increased. Physical properties and strength of ultrafine fiber after sea dissolution are lowered. If the S / r value is 0.001 or less, the islands may become stuck.

  The sea-island type composite fiber can be easily produced, for example, by the following method. That is, first, a polymer having a high melt viscosity and an easily soluble polymer and a polymer having a low melt viscosity and a hardly soluble polymer are melt-spun so that the former is a sea component and the latter is an island component. Here, the relationship between the melt viscosity of the sea component and the island component is important. When the sea component ratio decreases and the thickness between the islands decreases, when the melt viscosity of the sea component is small, some flow paths between the islands This is not preferable because sea components flow at high speed and joining between islands easily occurs.

  As the spinneret used for melt spinning, any one such as a hollow pin group for forming an island component or a group having a fine hole group can be used. For example, any spinneret that can form a cross section of the sea island by joining the island component extruded from the hollow pin or the fine hole and the sea component flow that is designed to fill the gap between them is compressed. . Examples of spinnerets that are preferably used are shown in FIGS. 1 and 2, but are not necessarily limited thereto. FIG. 1 shows a method in which a hollow pin is discharged into a sea component resin storage portion and is merged and compressed. FIG. 2 shows a method in which islands are formed by a fine hole method instead of a hollow pin.

  The discharged sea-island type cross-section composite fiber is solidified by cooling air, and is preferably wound after being melt-spun at 400 to 6000 m / min. The obtained undrawn yarn is taken as a composite fiber having desired strength, elongation and heat shrinkage properties through a separate drawing process, or is taken up by a roller at a constant speed without being wound once, and subsequently drawn. Any of the methods of winding after passing through may be used.

  Here, in order to produce a sea-island type composite fiber having a particularly fine island diameter with high efficiency, the fiber structure is not changed prior to neck stretching (orientation crystallization stretching) with ordinary so-called orientation crystallization. It is preferable to employ a fluid stretching process in which only the diameter is extremely reduced. In order to facilitate fluid drawing, it is preferable to preheat the fiber uniformly using an aqueous medium having a large heat capacity and draw at a low speed. By doing so, it becomes easy to form a fluid state at the time of stretching, and it can be easily stretched without development of the fine structure of the fiber. In this process, both the sea component and the island component are preferably polymers having a glass transition temperature of 100 ° C. or less, and particularly suitable for polyesters such as polyethylene terephthalate, polybutylene terephthalate, polylactic acid, and polytrimethylene terephthalate. Specifically, it is immersed in a hot water bath in the range of 60 to 100 ° C., preferably 60 to 80 ° C., and uniformly heated, the draw ratio is 10 to 30 times, the supply speed is 1 to 10 m / min, and the winding speed is It is preferable to carry out in the range of 300 m / min or less, particularly 10 to 300 m / min. If the preheating temperature is insufficient and the stretching speed is too high, the desired high-magnification stretching cannot be achieved.

  The drawn yarn drawn in the fluidized state is oriented, crystallized and drawn at a temperature of 60 to 220 ° C. in accordance with a conventional method in order to improve mechanical properties such as the strength and elongation. If the drawing conditions are outside this range, the properties of the resulting fiber will be insufficient. The draw ratio varies depending on the melt spinning conditions, flow stretching conditions, orientation crystallization stretching conditions, etc., but is 0.6 to 0.95 times the maximum draw ratio that can be stretched under the orientation crystallization stretching conditions. What is necessary is just to extend | stretch.

The sea-island type composite fiber described above is twisted untwisted or retwisted as necessary, and the warp yarn and / or the whole weft yarn or the warp and / or the weft yarn are arranged alternately with one or more other yarns. Then, after weaving and knitting, the sea component is dissolved and removed with an alkaline aqueous solution, and then the surface of the woven or knitted fabric is subjected to hydrophilic processing as necessary, whereby the fabric capable of adsorbing the acidic and alkaline odors of the present invention is obtained. can get.
Here, it is important to dissolve and remove sea components from the fabric with an alkaline aqueous solution. The removal method is not particularly limited, and any method may be used as long as the sea component can be completely dissolved and removed.

  Furthermore, it is preferable that the fabric is subjected to hydrophilic processing because higher odor adsorbability can be obtained. As the hydrophilic agent, any hydrophilic agent having an affinity for the constituent fibers can be used, and in particular, a hydrophilic polymer having an affinity for the polyester fiber is preferably used. For example, a block copolymer obtained by block copolymerization of polyethylene glycol diacrylate and derivatives thereof, polyalkylene glycol (polyethylene glycol, polypropylene glycol, etc.), terephthalic acid and / or isophthalic acid and lower alkylene glycol (ethylene glycol, etc.) Etc. can be illustrated. At that time, only one type of hydrophilic agent may be used, or two or more types of hydrophilic agents may be used in combination. The method for applying the hydrophilic agent is not particularly limited, and examples thereof include dyeing and bathing, padding, flat screen printing, rotary screen printing, roller printing, gravure roll, kiss roll, and foam processing methods. Illustrated. The adhesion amount of the hydrophilizing agent is preferably in the range of 0.20 to 0.50% by weight with respect to the weight of the fabric.

  Moreover, you may give a dyeing | staining process before and / or after the melt | dissolution removal process of the sea component by the said alkaline aqueous solution. In addition, conventional brushing processing, UV shielding or antistatic agents, and various processing that gives functions such as antibacterial agents, deodorants, insect repellents, phosphorescent agents, retroreflective agents, negative ion generators are additionally applied. May be.

  The fabric thus obtained contains a polyester multifilament yarn having a very small single fiber diameter, so that the surface area of the fiber is increased and excellent odor adsorbability is obtained. And it is excellent in form stability compared with the fabric comprised by activated carbon fiber. Furthermore, such fabrics are also flexible because they have a specific basis weight.

  Next, the textile product of the present invention is a men's garment, women's garment, sportswear, outdoor wear, raincoat, work clothes, protective clothing, artificial leather, using the fabric capable of adsorbing the acidic and alkaline odors described above. A textile product selected from the group of curtains and car seats. Such a textile product contains the above-mentioned fabric, so that it has excellent odor adsorbability, and is flexible and has shape stability.

  Next, although the Example and comparative example of this invention are explained in full detail, this invention is not limited by these. In addition, each measurement item in an Example was measured with the following method.

<Melting viscosity> The polymer after drying is set in the orifice set to the ruder melting temperature at the time of spinning, melted and held for 5 minutes, extruded with several levels of load, and the shear rate and melt viscosity at that time are plotted. To do. By gently connecting the plots, a shear rate-melt viscosity curve is created, and the melt viscosity when the shear rate is 1000 sec- 1 is observed.

<Dissolution rate> The yarn is wound up at a spinning speed of 1000 to 2000 m / min with a 0.3φ-0.6L × 24H base of each of the sea and island components, and the residual elongation is in the range of 30 to 60%. To produce a 84 dtex / 24 fil multifilament. The weight loss rate was calculated from the dissolution time and the dissolution amount at a bath ratio of 100 at a temperature at which the solvent was dissolved in each solvent.

<Load-elongation curve> The weight of 9000 m of the sea-island type composite fiber was measured n = 3 times, and the fineness was determined from the average value. Then, a load-elongation curve was obtained at room temperature with an initial sample length = 100 mm and a pulling speed of 200 m / min.

<Toughness> Toughness was calculated from the following equation.
Toughness = strength × √elongation The fineness of the ultrafine fiber was calculated from the fineness (D) of the sea-island type composite fiber and the dissolution removal rate (R) obtained previously. The formula is as follows.
Fineness of extra fine fiber = D x (1-R)
Extra fine fibers were extracted from the fabric, and the load-elongation curve was determined. The strength was obtained by dividing the load value at break by the calculated fineness, and the elongation was obtained from the elongation value at break.

<Mass weight> It was measured according to JIS L1096 6.4.2.

<Odor adsorption rate> 2 g of the fiber structure is put in a Tedlar bag containing 3 L of air containing malodorous components having the concentrations shown in Table 1 below, and the concentration of malodorous components in the Tedlar bag after 2 hours is detected by a gas-tex detector tube. The odor adsorption rate was determined from the decrease.
・ Odorous component: Ammonia Initial concentration 40ppm
・ Odorous component: Hydrogen sulfide initial concentration 15ppm
・ Odorous component: Acetic acid Initial concentration 50ppm

[Example 1]
Polyethylene terephthalate (melting viscosity at 280 ° C. at 280 ° C.) as an island component, polyethylene terephthalate (melt at 280 ° C.) copolymerized with 6 mol% of 5-sodium sulfoisophthalic acid and 6% by weight of polyethylene glycol having a number average molecular weight of 4000 as a sea component (Dissolution rate ratio (sea / island) = 230), sea-island = 40: 60, sea-island type = 500 sea-island type composite undrawn fiber with a spinning temperature of 280 ° C. and a spinning speed of 1500 m / It was melt-spun in minutes and wound up once.

  The obtained undrawn yarn was roller-drawn at a drawing temperature of 80 ° C. and a draw ratio of 2.5 times, and then heat-set at 150 ° C. and wound up. The obtained sea-island type composite drawn yarn was 50 dtex / 10 fil and the cross section of the fiber was observed with a transmission electron microscope TEM. As a result, the shape of the island was round and the diameter of the island was 520 nm. Further, when the relationship between the island diameter (r) and the sea thickness (S) between the islands, the fiber diameter (R) and the maximum sea thickness (Sm) was examined, S / r = 0.1, Sm / R = 0. .05.

Next, the stretched yarn is arranged in the warp and weft in a non-twisted manner, and the plain weave is produced by a normal weaving method at a weave density of warp density of 225 pieces / 2.54 cm and weft density of 200 pieces / 2.54 cm. I got a living machine.
The fabric was subjected to a wet heat treatment at 60 ° C., and then a 40% reduction (alkaline reduction) was performed at 60 ° C. with a 3.5% NaOH aqueous solution in order to remove the sea component of the sea-island type composite drawn yarn. Thereafter, the same dyeing treatment and hydrophilic treatment were performed in the same bath treatment, so that a hydrophilizing agent (polyethylene terephthalate-polyethylene glycol copolymer) was attached in an amount of 0.30% by weight with respect to the fabric weight.

When the surface of the fabric and the cross section of the warp and weft were observed with a scanning electron microscope SEM, the sea component was completely dissolved and removed, and the total amount of warp and weft of the fabric was very uniform (single fiber). (Fiber diameter 520 nm).
In the obtained woven fabric, the basis weight is 62 g / m 2 , and the odor adsorption rate is 91% for ammonia, 83% for hydrogen sulfide, and 95% for acetic acid. Had. The toughness of the polyester multifilament yarn contained in the woven fabric was 31.

[Example 2]
In the same manner as in Example 1, a sea-island type composite drawn yarn 50 dtex / 10 fil was obtained. Next, a multifilament false twisted yarn (56 decitex / 144 filament, single yarn fineness 0.39 dtex) made of ordinary polyethylene terephthalate is twisted at 150 times / m (S direction), and the whole amount is arranged on the warp. All the above-mentioned sea-island type composite drawn yarns are twisted at 150 times / m (S direction), and all the yarns are arranged in the wefts. The warp density is 216 yarns / 2.54 cm, and the weft density is 180 yarns / 2.54 cm. A plain fabric woven machine was obtained by a normal weaving method at a weaving density.
Thereafter, the fabric was subjected to wet heat treatment, alkali weight loss processing, dyeing processing, and hydrophilic processing in the same manner as in Example 1. The alkali weight loss rate at this time was 12.4%, and the adhesion amount of the hydrophilizing agent (polyethylene terephthalate-polyethylene glycol copolymer) was 0.24% by weight relative to the fabric weight.

When the surface of the fabric and the cross section of the weft were observed with a scanning electron microscope SEM, the sea component was completely dissolved and removed, and the total amount of weft of the fabric was composed of ultrafine fibers with excellent uniformity. It was confirmed.
In the obtained woven fabric, the basis weight is 71 g / m 2 , and the odor adsorption rate is 81% for ammonia, 80% for hydrogen sulfide, and 87% for acetic acid. Had. The toughness of the polyester multifilament yarn contained in the woven fabric was 31.

[Example 3]
Using the same sea / island polymer as in Example 1, spinning and drawing were performed in the same manner as in Example 1 with sea: islands = 30: 70 and the number of islands = 836 to obtain a 56 dtex / 10 fil sea-island composite drawn yarn. . In the drawn yarn, the diameter of the island was 600 nm from observation of the fiber cross section with a transmission electron microscope TEM.
All the stretched yarn is untwisted and distributed in the warp and weft, and at a weaving density of warp density of 204 / 2.54 cm and weft density of 180 / 2.54 cm, a plain weaving machine is produced by a normal weaving method. Obtained.
Thereafter, the fabric was subjected to wet heat treatment, alkali weight loss processing, dyeing processing, and hydrophilic processing in the same manner as in Example 1. The alkali weight loss rate at this time was 30%, and the adhesion amount of the hydrophilizing agent (polyethylene terephthalate-polyethylene glycol copolymer) was 0.28% by weight relative to the fabric weight.

When the surface of the fabric and the cross section of the warp and the weft were observed with a scanning electron microscope SEM, the sea component was completely dissolved and removed, and the total amount of the warp and weft of the fabric was composed of ultrafine fibers with excellent uniformity. Confirmed that it has been.
In the obtained woven fabric, the basis weight is 53 g / m 2 , and the odor adsorption rate is 87% for ammonia, 81% for hydrogen sulfide, and 91% for acetic acid. Had.

[Example 4]
In Example 1, a woven fabric was obtained in the same manner as in Example 1 except that hydrophilic processing was not performed.
In the obtained woven fabric, the basis weight is 61 g / m 2 , and the odor adsorption rate is 77% for ammonia, 71% for hydrogen sulfide, and 81% for acetic acid. Had.

[Comparative Example 1]
Using the same sea / island polymer as in Example 1, spinning and drawing was performed at sea: island = 50: 50, and the number of islands was 100, and a sea-island type composite drawn yarn of 50 dtex / 10 fil was obtained. In the drawn yarn, the diameter of the island was 1080 nm from observation of the fiber cross section with a transmission electron microscope TEM.
The stretched yarn is untwisted and distributed in all amounts to warp and weft, and a plain weaving machine is produced by a normal weaving method at a weaving density of warp density 240 / 2.54 cm and weft density 161 / 2.54 cm. Obtained.
Thereafter, the fabric was subjected to wet heat treatment, alkali weight loss processing, dyeing processing, and hydrophilic processing in the same manner as in Example 1. The alkali weight loss rate at this time was 50%, and the adhesion amount of the hydrophilizing agent (polyethylene terephthalate-polyethylene glycol copolymer) was 0.33% by weight with respect to the fabric weight.

When the surface of the fabric and the cross section of the warp and the weft were observed with a scanning electron microscope SEM, the sea component was completely dissolved and removed, but the uniformity of the island component was insufficient. This is because the sea component thickness between the islands is increased due to the large amount of sea component, and while the sea component at the center of the fiber cross section is being reduced, the island component of the fiber surface portion from which the sea component has been removed first is reduced. This is a non-uniformity caused by exposure.
In the obtained woven fabric, the basis weight was 122 g / m 2 , and the odor adsorption rate was insufficient, 30% for ammonia, 40% for hydrogen sulfide, and 40% for acetic acid. .

[Comparative Example 2]
In the same manner as in Example 1, a sea-island type composite drawn yarn 50 dtex / 10 fil was obtained. Next, the stretched yarn is non-twisted and distributed in the warp and weft in a total amount, and a plain weave fabric is obtained by a normal weaving method at a weave density of warp density of 156 / 2.54 cm and weft density of 140 / 2.54 cm. I got a living machine.
Thereafter, the fabric was subjected to wet heat treatment, alkali weight loss processing, dyeing processing, and hydrophilic processing in the same manner as in Example 1. The alkali weight loss rate at this time was 40%, and the adhesion amount of the hydrophilizing agent (polyethylene terephthalate-polyethylene glycol copolymer) was 0.30% by weight with respect to the fabric weight.
In the obtained woven fabric, the basis weight was 25 g / m 2 , and the odor adsorption rate was insufficient, 30% for ammonia, 40% for hydrogen sulfide, and 40% for acetic acid. .

[Comparative Example 3]
Using polyethylene terephthalate as the island component, polyethylene terephthalate copolymerized with 3% by weight of polyethylene glycol as the sea component (dissolution rate ratio (sea / island) = 8), sea: island = 20: 80, number of islands = 500 Drawing was performed to obtain a sea-island type composite drawn yarn of 50 dtex / 10 fil. In the drawn yarn, the diameter of the island was 1080 nm from observation of the fiber cross section with a transmission electron microscope TEM.
All the stretched yarn is untwisted and distributed in the warp and weft, and at a weaving density of warp density of 390 / 2.54 cm and weft density of 210 / 2.54 cm, a weaving machine with a satin texture is formed by a normal weaving method. Obtained.
Thereafter, the fabric was subjected to wet heat treatment, alkali weight loss processing, dyeing processing, and hydrophilic processing in the same manner as in Example 1. The alkali weight loss rate at this time was 20%, and the adhesion amount of the hydrophilizing agent (polyethylene terephthalate-polyethylene glycol copolymer) was 0.36% by weight relative to the fabric weight.

When the surface of the fabric and the cross section of the warp and the weft were observed with a scanning electron microscope SEM, most of the sea components remained without being dissolved and removed, although the sea equivalent was reduced. It was. This is considered to be caused by the fact that the amount of islands on the fiber surface is reduced because the alkali dissolution rate of the sea component is insufficient compared to that of the island component.
In the obtained woven fabric, the basis weight is 280 g / m 2 , and the odor adsorption rate is insufficient with 24% for ammonia, 20% for hydrogen sulfide, and 30% for acetic acid, Moreover, the soft texture peculiar to an ultrafine fiber was not obtained.

  ADVANTAGE OF THE INVENTION According to this invention, the fabric which has the outstanding odor adsorption property, and can adsorb | suck the acidic and alkaline odor which was flexible and excellent in form stability, its manufacturing method, and a textile product are provided, The industrial value is very large. It is.

1 is a schematic view showing an example of a spinneret used for spinning a sea-island type composite fiber that can be used in the present invention. It is the schematic which shows the other example of the spinneret used in order to spin the sea-island type | mold composite fiber which can be used in this invention.

Explanation of symbols

1: Pre-distribution island component polymer reservoir portion 2: Island component distribution introduction hole 3: Sea component introduction hole 4: Pre-distribution sea component polymer reservoir portion 5: Individual sea / island = sheath / core structure forming portion 6: Whole sea island confluence Part

Claims (8)

  1. Polyester multifilament yarn having a single fiber diameter of 10 to 1000 nm is included, and the basis weight is 30 to 300 g / m. 2 A method for producing a fabric capable of adsorbing an odor within the range of
       A fabric is obtained using a sea-island type composite fiber in which the island component is made of polyester and the diameter of the island component is 10 to 1000 nm, and the dissolution rate ratio (sea / island) between the sea component polymer and the island component polymer is 200 or more. After that, the sea component of the sea-island type composite fiber is dissolved and removed with an alkaline aqueous solution, and then the fabric is subjected to a hydrophilic treatment, whereby the basis weight is 30 to 300 g / m. 2 The manufacturing method of the fabric which can adsorb | suck the odor characterized by being in the range of this.
  2. The manufacturing method of the fabric which can adsorb | suck the odor of Claim 1 whose said island number is 100 or more.
  3. In the above-mentioned sea-island type composite fiber, the sea component is composed of polylactic acid, ultrahigh molecular weight polyalkylene oxide condensation polymer, polyethylene glycol compound copolymer polyester, and copolymer polyester of polyethylene glycol compound and 5-sodium sulfoisophthalic acid. The manufacturing method of the fabric which can adsorb | suck the odor of Claim 1 or Claim 2 which is the at least 1 sort (s) of aqueous solution easily soluble polymer selected.
  4. The odor-adsorbing fabric according to claim 3, wherein the sea component is polyethylene terephthalate copolymerized with 6 to 12 mol% of 5-sodium sulfonic acid and 3 to 10 wt% of polyethylene glycol having a molecular weight of 4000 to 12000. Production method.
  5. An easily soluble component and a hardly soluble component having a lower melt viscosity than the easily soluble component are melted and extruded using the former as a sea component and the latter as an island component, and taken as a sea-island type composite undrawn yarn at a spinning speed of 400 to 6000 m / min. The fabric capable of adsorbing odors according to any one of claims 1 to 4, wherein the sea-island type composite undrawn yarn is oriented, crystallized and stretched at a temperature of 60 to 220 ° C, and then a fabric is produced using the drawn yarn. Manufacturing method.
  6. The method for producing a fabric capable of adsorbing an odor according to any one of claims 1 to 5, wherein a melt viscosity ratio (sea / island) of a sea component and an island component at a melt spinning temperature is 1.1 to 2.0. .
  7. A polymer having a glass transition temperature of 100 ° C. or lower is used as the sea component and the island component, and the sea-island type composite undrawn yarn is placed in a liquid bath at 60 to 100 ° C. prior to orientation crystallization drawing of the sea-island type composite undrawn yarn The manufacturing method of the fabric which can adsorb | suck the odor in any one of Claims 1-6 including the process of extending | stretching at a draw ratio of 10 to 30 times and a draw speed of 300 m / min or less in a fluid state while being immersed in.
  8. In the sea-island type composite fiber, the island diameter (r) and the sea thickness (S) between the islands, the fiber diameter (R) and the maximum thickness (Sm) of the sea part satisfy the following relational expressions. The manufacturing method of the fabric which can adsorb | suck the smell in any one.
    0.001 ≦ S / r ≦ 0.5
    Sm / R ≦ 0.15
    Here, r is the island diameter, and S is the thickness of the sea part between the islands. Sm is in the center of the fiber
    The thickness of the thickest sea part, excluding existing sea parts.
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BRPI0821119B8 (en) 2007-12-14 2018-11-13 3M Innovative Properties Co composition, method for preparing an article, method for preparing a composition, and method for contacting an underground formation with a fluid composition
CA2708804C (en) 2007-12-14 2016-01-12 3M Innovative Properties Company Fiber aggregate
MX2010006455A (en) 2007-12-14 2010-09-28 Schlumberger Technology Bv Methods of treating subterranean wells using changeable additives.
JP2009161890A (en) * 2008-01-10 2009-07-23 Teijin Fibers Ltd Waterproof woven fabric and fiber product
JP2009249793A (en) * 2008-04-10 2009-10-29 Teijin Fibers Ltd Fabric for car sheet
JP5249649B2 (en) * 2008-06-26 2013-07-31 帝人株式会社 Fiber products
JP2010248668A (en) * 2009-04-17 2010-11-04 Teijin Fibers Ltd Cloth and textile product
JP2010275649A (en) * 2009-05-27 2010-12-09 Teijin Fibers Ltd Fiber structure and textile product
US9334608B2 (en) 2009-10-20 2016-05-10 Teijin Frontier Co., Ltd. Polyester fiber, method for producing the same, cloth, textile product, and polyester formed article
JP5603064B2 (en) * 2009-12-24 2014-10-08 帝人株式会社 Woven knitted fabric and textile products with excellent heat insulation
JP2012107346A (en) * 2010-11-15 2012-06-07 Gunze Ltd Method for applying stain-proof function to polyester fiber product

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