JPH10310962A - Feather fiber-compounded nonwoven fabric of water flow interlacement type - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an oil-absorbing nonwoven fabric excellent in an oil- absorbing speed, an oil-absorbing ratio, etc. SOLUTION: A water flow interlacement type nonwoven fabric compounded with feather fibers is provided as an oil-absorbing nonwoven fabric. The water flow interlacement type nonwoven fabric is obtained by jetting high pressure water column flows to a sheet produced by subjecting a fiber composition such as pulp fibers and the feather fibers to a wet type paper-making process to integrally interlace the fiber composition with the feather fibers. The feather fibers strongly leaving the original characteristics of the feather are subjected to the wet type paper-making process together with the pulp fibers, etc., and further to the water flow interlacement process. Thereby, the chemical properties of the feather fibers and the water flow-interlaced structure (three-dimensional structure) of the feather fibers, the pulp fibers, etc., act synergistically on each other. Thus, the oil-absorbing nonwoven fabric having excellent oil-absorbing performances such as a large oil-absorbing speed and a large oil-absorbing ratio can be provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil-absorbing non-woven fabric made of a wet non-woven fabric obtained by subjecting a sheet-like material obtained by wet-making pulp fiber or the like and feather fiber to wet entanglement. Provided is a nonwoven fabric having excellent oil absorption performance such as a large oil absorption ratio.

[0002]

2. Description of the Related Art Japanese Patent Application Laid-Open No. 5-253160 discloses a conventional technique of a hydroentangled nonwoven fabric.
A paper sheet having a swelling tensile strength in a specific range is laminated on the surface of (mainly, hydrophobic one such as polypropylene or polyester), and subjected to a high-pressure water column flow from the surface of the paper sheet toward the long fiber web. A water-absorbing wipe made of a nonwoven fabric in which long fibers and pulp fibers are entangled is disclosed.

In general, when a nonwoven fabric is manufactured by a water entanglement method, a normal paper sheet has a bad effect such that the paper sheet is broken by the pressure of a high-pressure water column flow, and pulp fibers of the paper sheet are scattered in the air. The above prior art employs a paper sheet having a specific wet tensile strength,
In addition to eliminating this adverse effect, the present invention aims to provide a wiping cloth excellent in water absorbency and water retention, as well as touch feeling, by relatively entanglement of pulp fibers and web long fibers (the same publication). Of paragraph No. 6 and paragraph No. 24). Incidentally, in the related art, hydrophobic fibers such as polypropylene and polyester are used to maintain the strength of the nonwoven fabric, and the paper sheet is mainly used to secure water absorption performance and the like.

[0004]

However, the above prior art focuses on the functions of the nonwoven fabric, such as water absorption and water retention, and aims to use the nonwoven fabric for water absorption, such as disposable hand wiping, wet tissue, and wiper. It is assumed that.

[0005] On the other hand, recently, various oil absorbing materials have been marketed for the purpose of recovering oil at the time of crude oil spill, recovering industrial waste oil or suspended oil, or treating edible oil at home. As this oil absorbing material, a polypropylene nonwoven fabric manufactured by a spun bond method, a melt blow method, or the like,
A typical example is a material made of a natural kapok fiber, and among these, the share of a synthetic oil absorbing material made of a polypropylene nonwoven fabric is overwhelming.

It is a technical object of the present invention to provide a hydroentangled nonwoven fabric made of a new material different from the above polypropylene nonwoven fabric and the like for oil absorption.

[0007]

SUMMARY OF THE INVENTION The applicant of the present invention has previously disclosed in Japanese Patent Application Laid-Open Nos. 4-322534 and 6-34657.
No. 6 discloses a fine feather powder and a surface modifier using the same, but the fine feather powder exhibits excellent oil absorption performance as described in the publication.

On the other hand, the present applicant has previously filed Japanese Patent Application No. 8-54.
No. 528, applying the high-pressure water column flow to a paper sheet obtained by wet-making natural pulp fiber instead of the above-mentioned conventional technology of applying a high-pressure water column flow to a laminate of a hydrophobic long fiber web and a paper sheet. Therefore, a technique for producing a non-woven fabric of a water entanglement method using only pulp fibers as a material was proposed. The hydro-entangled pulp nonwoven fabric of the prior art does not require a resin binder for improving the strength, and has the advantage that it is biodegradable and easy to dispose of because it uses only pulp fibers and does not pollute the environment. There is.

The present inventors have effectively extracted the oil-absorbing performance of the feathers by not reducing the feathers to the above-mentioned feather fine powder but keeping them in a so-called intermediate form of feather fibers. The present invention was completed based on the idea of using the nonwoven fabric produced by using the above-mentioned hydroentanglement method with the feather fiber and the pulp fiber for oil absorption.

That is, in the present invention 1, a high-pressure water column flow is jetted toward a sheet-like material obtained by wet-making a fiber composition and feather fibers, so that the fibers of the fiber composition and the feather fibers are entangled with each other and integrated. A hydroentangled feather fiber-containing oil-absorbing nonwoven fabric, comprising a feathered fiber entangled nonwoven fabric, and capable of absorbing and removing oil on the surface to be treated by contact with the surface to be treated.

[0011] The present invention 2 is characterized in that, in the above-mentioned present invention 1, the fiber composition is pulp fiber.

[0012] The present invention 3 is characterized in that, in the above-mentioned present invention 1 or 2, the blending ratio of the feather fiber is 20% by weight or more.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The feather fiber of the present invention is a fibrous feather powder.
0 μm (preferably 100 to 300 μm) Obtained when the feathers are milled under the conditions set at 100 μm, the original shape of the feathers disappears, and a fibrous form can be visually confirmed (branch) (Including a fibrous form). In short, when the feathers are crushed, they are not finely crushed into the feather fine powder, but remain in a fiber form (FIGS. 4A to 4B).
It is necessary to stay at an intermediate stage.

The above-mentioned feather fibers include those manufactured by any method regardless of the manufacturing method, and for example, manufactured by the following method. (1) The feathers are pulverized by various pulverizers such as a mill and a crusher (in particular, a stone mill type grinder, a screw kneader, etc.). (2) Explosion treatment is performed using a puffing machine (eg, press panda; manufactured by Tsurumi Soda Co., Ltd.). The explosion treatment is a process in which a sample pressurized and heated in a pressure vessel is rapidly released into the atmosphere to instantaneously vaporize the water contained in the sample, and the large amount of water vapor generated at this time causes the internal structure of the sample to evolve. A method of destroying a structure.

The applicant of the present invention has disclosed the above-mentioned Japanese Patent Application Laid-Open No. 4-321534.
Discloses a method for producing feather fine powder using the above-mentioned pulverizer in the above-mentioned publications, and this production method does not perform heating or the like, immerses feathers in an alcohol-based solvent, and performs milling-type rotary grinding. Although the basic principle is to pulverize, preferably, the feathers are preliminarily washed and subjected to the above-mentioned pulverization,
It is manufactured by filtration, washing and drying.

When the feather fiber of the present invention is obtained by, for example, the pulverization method of the above (1), the above-mentioned pulverizing technology of the fine feather powder may be used. Therefore, the method for producing feather fiber based on this basic crushing technique will be described in detail. First, in the above-mentioned preliminary cleaning, water washing is performed, followed by washing with an alcohol-based solvent to dissolve and remove oils and fats attached to feathers, and to remove water. Feathers that are not familiar to the skin are made into a dipped material suitable for the wet pulverization process in the next step.

The advantages of the above-mentioned alcohol washing are that there is no problem of remaining water after washing with water, and there is no need for complete replacement with alcohol. The concentration of alcohol in the integrated process from the alcohol washing to the next grinding and pulverization can be 0.01 to 99.99%, but practically, the feather can be simultaneously disinfected and disinfected. ~ 7
0% is preferred. The alcohol used is saturated,
A wide variety of unsaturated aliphatic and aromatic mono-, di-, and polyhydric alcohols can be used, but ethanol,
Isopropanol is preferred, and those listed in the Japanese Pharmacopoeia can be used as 70% ethanol, 30%, and 50% isopropanol.

In the above-mentioned pulverization, the above-mentioned alcohol-impregnated feathers are subjected to milling-type rotary grinding to obtain a suspension of the pulverized material. The stone mill type grinding machine is composed of upper and lower special grinders, and crushes the raw material by the force such as impact, shearing, compression, and rolling friction generated between the upper grinder on the fixed side and the lower grinder on the rotating side. . Conventional grinders can be used,
A recently developed ceramic having non-porous and non-crackable properties is suitable. In the alcohol immersion of the keratin substance to be introduced, the immersion ratio is generally 1: 1.0.
5 (solid: dispersion medium (V / V)) or more, but actually 1:20
The range of ~ 1: 100 is preferred. In operation, continuous grinding treatment in which the material that has been ground once is repeatedly fed into the grinder is also effective. Further, when the alcohol dispersion medium is exchanged during the continuous grinding treatment, the washing effect can be further promoted.

The above-mentioned pulverized material is separated and recovered by filtering the pulverized material suspension with a predetermined filter. This filtered ground product is
The residual oils and fats derived from the feathers are washed and removed with an alcohol or other volatile organic solvent, and then dried to obtain a desired fibrous feather powder (ie, feather fibers). In the final washing, the volume of the original feather is reduced and the surface area is increased, so that the oil and fat can be effectively dissolved and removed. The washing solvent can be used alone or in combination, but acetone and ether are preferably used.

The above-mentioned fiber composition may be used for producing wood pulp such as softwood and hardwood, deinked pulp (DIP), or non-wood pulp such as bagasse, manila hemp (abaka), linter pulp, kenaf, esparto grass and straw. Chemical pulp fiber cooked by the sulphite method, sulfite method, soda method, etc., or mechanical pulp fiber such as groundwood pulp (ground pulp) fiber, thermomechanical pulp fiber, etc. Is preferred. In addition, the above fiber composition is made of synthetic fibers such as polyethylene, polypropylene, polyvinyl alcohol, polyester, and polyacrylonitrile, and recycled or semi-synthetic fibers such as rayon, cupra, and acetate, and inorganic fibers such as rock wool, glass fibers, and carbon fibers. Fibers and the like can also be used. in this case,
These synthetic fibers and the like may be used in place of the above-mentioned natural fibers, or may be used in a composite form. The use of synthetic fibers such as polyester fibers in combination is effective in that practical strength can be imparted to the nonwoven fabric.

The above wet papermaking is a process in which a mixed paper stock (dispersion liquid) of a fiber composition and feather fibers is formed to obtain a sheet-like material. Generally, papermaking machines such as a circular net, a short net, a long net, and a suction homer are used. Specifically, an inclined short-mesh paper machine or a suction homer having a good dispersion state is preferable. In wet papermaking to obtain the sheet-like material, a dispersant such as a surfactant,
Various agents such as a thickener such as polyethylene oxide can be blended.

The commercial form of the nonwoven fabric of the present invention may be either a dry product or a wet product, but when it is marketed as a wet product, quaternary ammonium salts such as alkylpyridinium salts, benzalkonium salts, and alkylisoquinolium salts can be used. When the nonwoven fabric is immersed in a solution of (but a concentration range having a bactericidal effect is necessary), these quaternary ammonium salts have a bactericidal property and an adsorption ability to the keratin substance which is a material of the feather fiber, so that the nonwoven fabric has a bactericidal or Antimicrobial properties can be strongly imparted. Therefore, when this quaternary ammonium salt is used as a dispersant in the above wet papermaking, it can be protected from spoilage and the like without once drying the down milled material, and is already added at the stage of paper stock (dispersion liquid). Therefore, it is not necessary to separately apply a germicide at the stage of the obtained nonwoven fabric. Further, even when an amino acid-based (protein-based) surfactant or the like is used as the dispersant, good dispersibility can be obtained, and a preferable suspension can be prepared at the time of producing a nonwoven fabric.

The high-pressure water column flow process is a process in which the fiber composition obtained in the above-mentioned wet papermaking process and the fibers of the sheet-like material of feather fibers (mainly by hydrogen bonding) are entangled into a nonwoven fabric. Is what you do. The high pressure water column flow mechanism, for example,
As shown in FIG. 1, a plurality of high-pressure water column jetting devices 3 are arranged side by side in the conveying direction, and while the sheet-like material 2 manufactured in the wet papermaking process is conveyed at a predetermined speed by a conveyor, the sheet-like material is formed at a predetermined water pressure. A high-pressure water column flow can be ejected from one surface of the object 2 to the other surface. Further, in the high-pressure water column flow step, the first high-pressure water column flow ejection block and the second ejection block are combined, and the upper and lower surfaces of the sheet-like material 2 from which the high pressure water column flow is ejected by the first block are inverted, and Basically, a block is used to perform a double-sided process of jetting a high-pressure water column flow toward the other surface of the sheet-like material 2. One high-pressure water column flow block jets a high-pressure water column flow toward one surface of the sheet-like material 2. Can be performed.

In the high-pressure water column flow process, the conveying speed of the sheet-like material, the hole diameter of the nozzle hole of the high-pressure water-column jetting device, and the installation interval thereof are related to each other, and also related to the material of the sheet-like material. Need to be considered organically. For example, the transport speed is about 10 to 150 m / min, the nozzle holes of the high pressure water column jetting device are about 80 to 180 μm, and the interval is about 0.3 to 1.0 mm. The water pressure is, for example, 1
It is about 0 to 180 kg / cm ² .

In the production of the nonwoven fabric of the present invention, the wet nonwoven fabric is dried by a drier or the like after the water entanglement step. In the drying step, a Yankee dryer which is a conventional hot-plate pressing method may be used, but a through-drying type dryer is preferable because bulkiness and a soft texture can be imparted more effectively.

The nonwoven fabric containing feather fibers by the above-mentioned hydroentanglement method has excellent oil-absorbing performance as shown in the test examples described below, so that it can exhibit a smooth function as the oil-absorbing nonwoven fabric of the present invention 1 and have a sweat component on the skin surface. It can also be used for antiperspirant applications that absorb and remove sebum components. The compounding ratio of the feather fibers in the oil-absorbing nonwoven fabric may be appropriately adjusted depending on various specific uses, and is particularly preferably 20% by weight or more, more preferably 40% by weight or more. In the present invention 1,
It does not prevent forming the oil absorbing nonwoven fabric by combining the above-mentioned feather fiber entangled nonwoven fabric with other materials.

[0027]

[Action and effect of the invention]

(1) In addition to the chemical properties of the feather fiber itself, the oil-absorbing nonwoven fabric of the present invention 1 has an entangled structure of the fibers of the nonwoven fabric itself.
(Especially, the fiber gap of the feather fiber) due to the synergistic physical action such as capillary action, large oil absorption ratio,
The oil absorption speed is also extremely fast (see the evaluation test examples of the oil absorbing nonwoven fabric described later). In particular, as shown in an oil absorption comparison test example described later, the oil absorption per unit surface area is larger than that of a polypropylene nonwoven fabric, and the oil absorption per unit weight is comparable. Therefore, the nonwoven fabric for oil absorption of the feather fiber entanglement type of the present invention is a nonwoven fabric having excellent oil absorption performance by a new material different from a commercially available polypropylene nonwoven fabric or a natural kapok fiber, and as a specific application. Is used to absorb and capture waste oil and oil leaks from factories and commercial cafeterias, spilled oil and floating oil from rivers and oceans, various kitchens and gas stations in business establishments, and oil and dirt from kitchens and bathrooms at home. Or an oil collecting material.

(2) The feather fiber entangled nonwoven fabric of the present invention
As shown in (1), because it has excellent oil absorption performance (especially, because it is excellent in oil absorption per unit volume described below), it is also extremely effective in absorbing and removing sweat components and sebum components on the skin surface, It can also be used as a nonwoven fabric for antiperspirant. Specific uses include sebum removal materials, sweat wipes, tennis rackets,
Examples include grips for sports equipment such as bats and golf putters, arm bands, desk mats, and handrails of indoor and outdoor facilities. In addition, as described below, a natural nonwoven fabric in which natural fibers such as pulp fibers and feather fibers are hydroentangled is suitable for the antiperspirant nonwoven fabric.

(3) Since the nonwoven fabric for oil absorption of the present invention is a wet nonwoven fabric of a water entanglement system using a high-pressure water column flow, it can be manufactured with excellent productivity and at low cost. In addition, due to the hydroentanglement method, the fibers are complicatedly entangled with a three-dimensional spatial spread, and as shown in an evaluation test example (particularly, the item of density) described later, a bulky and fluffy texture is obtained. As well as being able to exert a strong physical action such as capillary action, the oil absorption performance can be promoted. Further, since a binder such as a resin is not required, characteristics such as feather fiber of a raw material can be maximized. In addition, when natural fibers such as pulp fibers are selected for the fiber composition of the feather fibers, biodegradability can be imparted to the entire nonwoven fabric, so that there is no need to incinerate at the time of disposal, and it is sufficient to bury in the soil. (Or it can be actively used as agricultural material) and does not pollute the surrounding environment.

(4) Since feathers that have been almost discarded are used as non-woven fabric as feather fibers, effective use of waste materials and saving of resources can be achieved at the same time.

[0031]

EXAMPLES The following non-limiting examples of the production of nonwoven fabrics for oil absorption containing feather fibers and hydroentangled feather fibers, evaluation test examples of the oil absorption speed and strength of the nonwoven fabric for oil absorption, and comparison of the nonwoven fabric with commercially available polypropylene nonwoven fabric The oil absorption test examples described above will be sequentially described. The technical idea of the present invention is not limited by the following examples and test examples.

In producing the nonwoven fabric for oil absorption containing feather fibers of the hydroentanglement method, first, feather fibers were prepared in the following manner. << Production Example of Feather Fiber >> Chicken feathers were washed with water, blood and meat pieces were removed, air-dried, degreased with ether, and immersed in 70% ethanol. Ethanol immersed degreased feathers are milled with a stone mill (Maskloider MKZA6-
5; manufactured by Masuyuki Sangyo Co., Ltd.), followed by filtration, washing with water and filtration again to obtain a ground material of feathers. Next, the above-mentioned ground feathers were dried to obtain feather fibers, which are fibrous feather powders. However, when the above-mentioned stone mill type grinding is performed, the clearance between the grinding wheels is generally 50 to 500 μm, preferably 1 to 500 μm.
It was set to 00-300 μm. When the manufactured feather fiber is observed with an electron microscope, as shown in FIGS. 4A to 4B,
It was confirmed that the original fiber form of the feather before grinding was effectively retained and retained.

FIG. 1 is a schematic side view of an apparatus for producing an oil-absorbing nonwoven fabric according to the present invention, which is a block diagram of a sheet-like material. A, the first and second high-pressure water column flow processing blocks B to C, and the drying processing block D are arranged in order toward the downstream side in the sheet conveying direction.

The production block A of the above-mentioned sheet-like material is constituted by an inclined short-mesh papermaking machine 1, and a sheet-like material 2 containing feather fibers is produced by this block A. The sheet 2 is conveyed to the high-pressure water column flow block B, then inverted by the wire mesh conveyor 6 and conveyed to the second high-pressure water column flow processing block C, where both surfaces of the sheet-like material 2 are exposed to the jet of the high-pressure water column flow to form feather fibers. The fiber composition is entangled and processed, and finally sent to the drying block D by the wire mesh conveyor 7 and dried to obtain a dried product of the hydroentangled nonwoven fabric for oil absorption. In the first and second high-pressure water column flow processing blocks B to C, three high-pressure water column jetting devices 3 and 5 are arranged in parallel in the conveying direction, each of which is directed toward the sheet-like material 2 conveyed at a predetermined speed. At a predetermined water pressure.

<< Production Example of Oil-absorbing Non-woven Fabric Containing Hydro-entangled Feather Fiber >> Natural pulp and polyester fiber (hereinafter, referred to as
PET fiber) and the three components of the feather fiber obtained in the above example were mixed and dispersed in water with the following composition, and 0.05% by weight of the quaternary ammonium salt with respect to the total weight of the fiber (specifically,
After adding benzalkonium chloride), the mixture was sufficiently stirred and dissociated with a dissociator to prepare a uniform dispersion slurry. Next, the dispersion slurry was wet-formed with the inclined short-mesh papermaking machine 1 to obtain three types of sheet-like materials containing feather fibers. However, the natural pulp is a mixture of NBKP (softwood bleached kraft pulp) and abaca at a ratio of 1: 1. PET fiber (0.4 denier, fiber length 10 mm) was added to maintain the strength of the non-woven fabric for oil absorption as a final target at a practical level. (1) Feather fiber: Pulp: PET fiber = 20% by weight: 50
Weight%: 30% by weight (2) Feather fiber: Pulp: PET fiber = 40% by weight: 30
Weight%: 30% by weight (3) Feather fiber: Pulp: PET fiber = 60% by weight: 10
% By weight: 30% by weight

On the other hand, the conditions for wet papermaking were set in the same manner as in the above-mentioned production examples, and a pulp from which feather fibers were omitted and a sheet-like material consisting only of PET fibers were obtained by the following formulation. Feather fiber: Pulp: PET fiber = 0% by weight: 70% by weight: 30% by weight In this case, in the case of a sheet-like material in which feather fiber is blended and in which feather fiber is omitted, the blending ratio of PET fiber is all 30% by weight. It was constant and only the blending ratio of feather fiber and pulp was changed.

Next, the above-mentioned sheet material was placed on a conveyor 4 formed of a wire mesh, and was conveyed to the first high-pressure water column flow processing block B at a line speed of 10 m / min. In the first block B, the three high-pressure water column jetting devices 3 arranged side by side have a hole diameter of 0.12 mm and an interval between the nozzle holes of 0.60 mm. ), High-pressure water jets were jetted at a water pressure of 50, 50 and 70 kg / cm ² , respectively. Next, the sheet is turned over at the end of the wire mesh conveyor 6 and transported to a second high-pressure water column flow processing block C (the nozzle holes of the high-pressure water column flow jetting device and the interval thereof are the same as those of the first block B). A high-pressure water column flow was ejected from the back side (upper side) of the sheet under the same water pressure conditions as the first block B, and both surfaces of the sheet were subjected to high-pressure water column treatment. Thereafter, the mixture was guided to a through drier 8 and dried to obtain a water entangled nonwoven fabric for oil absorption.

The obtained oil-absorbing nonwoven fabric was divided into Samples 1 to 3 and Comparative Example 1 according to the kind of the sheet-like material, and the blending ratio of each sample and feather fiber (for the sake of convenience, the blending ratio of pulp and PET fiber was The details of (omitted) are as follows. (1) Sample 1: 20% by weight of feather fiber (2) Sample 2: 40% by weight of feather fiber (3) Sample 3: 60% by weight of feather fiber (4) Comparative Example 1: 0% by weight of feather fiber

2A and 2B show samples 1 and 2 observed with an electron microscope, and FIGS. 3A and 3B show samples 3 and Comparative Example 1 with an electron microscope. In samples 1 to 3, it is observed that pine needle-like, branch-like or needle-like feather fibers are partially entangled in pulp fibers and PET fibers,
No feather fiber is found in Comparative Example 1 as a matter of course.

In the above high-pressure water column flow treatment, the properties of the nonwoven fabric can be appropriately changed by changing the line speed of the sheet-like material and the water pressure of the high-pressure water column flow individually or simultaneously. In particular, the water pressure may be increased in the second block C from the first high pressure water column flow processing block B (for example, 50, 50, 60 kg / cm).
² → 90, 90, 100 kg / cm ² ). Also, as described above, a single high-pressure water column flow processing block can perform only one-sided processing on a sheet. On the other hand, the hydro-entangled nonwoven fabric may be subjected to secondary processing by a heat calender.

<< Evaluation Test Examples of Hydraulic Nonwoven Fabric Containing Feather Fibers of Hydroentanglement Type >> Evaluations of the nonwoven fabrics of Samples 1 to 3 and Comparative Example 1 obtained in the above Examples were as shown in the table below.

Sample 1 Sample 2 Sample 3 Comparative Example 1 Weight (g / m ² ) 62.9 62.3 55.0 69.1 Thickness (mm) 0.477 0.514 0.505 0.459 Density (g / cm ³ ) 0.132 0.121 0.109 0.151 Tensile strength (gf / 25mm width) Vertical dry 2303 752 194 5506 wet 1072 453 196 2432 Horizontal dry 958 537 87 2387 wet 310 296 97 544 elongation (%) Vertical Dry 30.7 18.2 10.9 26.7 Wet 30.4 14.0 15.8 26.4 Horizontal Dry 49.2 22.1 12.0 66.0 Wet 25.6 14.3 14. 84.60 Oil absorption rate (seconds) Dropping method Table 0000 Back 000 00 Oil absorption ratio (times) 10.6 13.3 17.1 9.0 Whiteness (%) Table 76.9 72.8 70.3 83.5 Back 76.6 72.7 70.1 83.1

However, the thickness / density evaluation method is JIS-P-811
8. Tensile strength was based on JIS-P-8113, elongation was based on JIS-P-8132, and whiteness was based on JIS-P-8132. The oil absorption rate was as follows: 1 drop (approx. 4 mg) of light oil (No. 1 light oil) was passed through the syringe needle H-5.
Was dropped and expressed in seconds until the absorption was completed. The oil absorption ratio was determined by immersing a sample in soybean oil for 15 seconds, taking out the sample, holding the sample having absorbed soybean oil by hand for 10 seconds, and increasing the weight.

According to the test results regarding oil absorption in the above table, it was confirmed that absorption of the nonwoven fabric was completed at the moment when the light oil was dropped, and that the oil absorption rate was extremely high in each of Samples 1 to 3. However, the oil absorption rate also shows zero in Comparative Example 1, which indicates that the physical structure of the nonwoven fabric, such as the entangled structure of the fibers, greatly contributes to the oil absorption rate. Further, the oil absorption ratio of Samples 1 to 3 reached 10.6 to 17.1 times as compared with Comparative Example 1 showing 9 times the own weight. In particular, in Sample 3 in which the blending ratio of feather fibers was 60% by weight, the oil absorption ratio was increased to 17.1 times, and the oil absorption ratio was greatly increased as the blending ratio of the feather fibers was increased. As described above, in the oil-absorbing nonwoven fabric of the present invention composed of Samples 1 to 3, in addition to the chemical properties of the feather fibers themselves, the entangled structure of the fibers of the nonwoven fabric itself (the fibers such as feather fibers and pulp fibers) gap)
It can be presumed that the synergistic action of the physical action such as the capillary action due to the above effectively contributes to the increase in the oil absorption ratio.

On the other hand, according to the weighing results in the above table, a bulkier and lighter oil-absorbing nonwoven fabric was obtained as the blending ratio of the feather fibers increased.
You can see that the texture and feel are good. The tensile strength is also P
Practical strength was maintained by the addition of ET fiber. In particular, since the nonwoven fabric is of a water entanglement type, the tensile strength of the nonwoven fabric is hardly reduced from dry even when wet. In addition, all of the nonwoven fabrics exhibited an elongation of 10% or more, and some of the nonwoven fabrics elongated by 30% or more.

Therefore, the degree of oil absorption performance of the hydroentangled feather fiber-containing oil absorbing nonwoven fabric of the present invention was tested in comparison with a polypropylene nonwoven fabric. << Comparative Test Examples of Oil Absorption of Oil Absorbent Nonwoven Fabric >> Samples 1 to 3 produced in the above examples were used as the oil absorbent nonwoven fabric of the present invention, and various commercial products were used as polypropylene nonwoven fabrics (Comparative Examples A to E).
The oil absorption amount per unit weight and the oil absorption amount per unit volume of Samples 1 to 3 and Comparative Examples A to E were examined by using, respectively, and the following results were obtained. In addition, in this oil absorption comparative example, the comparative example 1 which is a non-woven fabric of the hydroentanglement method in which feather fibers are not blended was also tested as a reference sample. The details of the commercially available polypropylene nonwoven fabrics of Comparative Examples A to E are as follows. Comparative Example A: Rheomat (manufactured by Sumitomo Chemical Co., Ltd.) Comparative Example B: Tuffnel (manufactured by Mitsui Petrochemical Co., Ltd.) Comparative Example C: WOSEP (manufactured by Toray Fine Chemical Co., Ltd.) Comparative Example D: Neo Attack Ace (Mitsubishi Oil) Comparative Example E: Super Attack (Mitsubishi Yuka Co., Ltd.)

Oil absorption (g / g) Oil absorption (g / cm ³ ) Oil used Sample 1 10.6 1.40 Soybean oil Sample 2 13.3 1.61 Soybean oil Sample 3 17.1 1.86 Soybean oil Comparative Example 1 9 1.36 Soybean Oil Comparative Example A 7.9-Machine Oil Comparative Example B 13 1.30 Machine Oil Comparative Example C 11 0.69 Peanut Oil Comparative Example D 13-Machine Oil Comparative Example E 18-Machine Oil

However, the oil absorption per unit weight (g / g)
g), and the oil absorption per unit volume (g / cm ³ ) were calculated based on the measured values of the evaluation test examples (in Comparative Examples A to E, measured in the same manner as the evaluation test examples, Calculated).

The oil absorption amount (g / g) per unit weight in the results of the oil absorption comparison test of the above-mentioned nonwoven fabric for oil absorption shows that, even in Sample 1 in which the blending ratio of feather fiber is 20% by weight, Comparative Example A or C shows It turned out to be superior or comparable. In addition, in Sample 3 in which the blending ratio of the feather fiber was 60% by weight, the value was almost equal to that of Comparative Example E, which was the best evaluation among the polypropylene nonwoven fabrics. It is clear that the oil absorption increased as the blending ratio of the feather fiber increased. In addition, it was recognized that Samples 1 to 3 exhibited performance comparable to that of a commercially available polypropylene nonwoven fabric as a whole. However, Comparative Example 1, which is a hydroentangled nonwoven fabric containing no feather fiber, also showed a high oil absorption, so that the fibers were complicated and three-dimensional by the hydroentanglement method with respect to a spunbond or meltblown polypropylene nonwoven fabric.
(3D) that the nonwoven fabric structure of the present invention (or Comparative Example 1) entangled effectively contributes to the increase in oil absorption per unit weight in addition to the chemical properties of the feather fiber I can see.

On the other hand, when looking at the oil absorption per unit volume (g / cm ³ ), it can be seen that, even though the oil used was different, Sample 1 in which the blending ratio of feather fibers was 20% by weight was superior to that of the polypropylene nonwoven fabric. Sample 3 in which the blending ratio of feather fiber is 60% by weight
Showed a value which cannot be achieved by the polypropylene nonwoven fabric, and it was clearly recognized that the oil absorption increased as the blending ratio of the feather fiber increased. However, since Comparative Example 1 also showed a high oil absorption, the nonwoven fabric structure of the hydroentanglement system was more effective than the spunbond or meltblown polypropylene nonwoven fabric in addition to the chemical properties of the feather fiber, It can be seen that this has effectively contributed to the increase in oil absorption.

As described above, the oil absorption test results show that the hydroentangled nonwoven fabric for oil-absorbing blended with feather fibers is excellent in oil absorption per unit weight and per unit volume. In terms of excellent oil absorption per unit weight, when producing a nonwoven fabric for oil absorption, the blending ratio of feather fibers as an oil absorbing component can be suppressed low, and production costs can be improved. In addition, since the oil absorption can be easily changed by adjusting the blending ratio of the feather fiber, it can be used in various applications.
(For example, from spilled crude oil at sea to treatment of household edible oil), an oil-absorbing non-woven fabric can be easily formed.

The oil-absorbing nonwoven fabric of the present invention is particularly excellent in oil absorption per unit volume. Therefore, when the thickness of the nonwoven fabric is constant, when the nonwoven fabric is brought into contact with the surface to be treated, the nonwoven fabric per unit area is constant. It can exhibit a more efficient oil absorbing effect and is suitable not only as an oil absorbing nonwoven fabric but also as an antiperspirant nonwoven fabric for absorbing and removing sweat components and sebum components on the skin surface.

[Brief description of the drawings]

FIG. 1 is a schematic side view of an apparatus for producing a nonwoven fabric for oil absorption containing feather fibers of a water entanglement system.

FIG. 2 is an electron micrograph at a magnification of 100 times of each sample observed in the production example of the nonwoven fabric for oil absorption.
FIG. 2B is a photograph of Sample 1, and FIG.

3A is a photograph of Sample 3 of the same production example, and FIG. 3B is a photograph of Comparative Example 1. FIG.

FIGS. 4A and 4B are electron micrographs of feather fibers observed. FIG. 4A is a photograph at 100 times magnification, and FIG. 4B is a photograph at 200 times magnification.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Paper machine, 2 ... Sheet-like material, 3 ... High pressure water column jetting device, 4, 6, 7 ... Wire mesh conveyor, 8 ... Dryer, A
... Sheet-shaped production block, B ... First high-pressure water column flow processing block, C ... Second high-pressure water column flow processing block, D ...
Drying block.

Continued on the front page (72) Inventor Tetsunori Kunitake 2451-1, Kawanoe-cho, Kawanoe-shi, Ehime Pref.

Claims (3)

[Claims] 1. A feather fiber entangled by jetting a high-pressure water column flow toward a sheet-like material obtained by wet-making a fiber composition and a feather fiber to entangle the fiber composition and the feather fiber. An oil-absorbing nonwoven fabric containing a water-entangled feather fiber, wherein the nonwoven fabric is made of a nonwoven fabric and is capable of absorbing and removing oil on the surface to be treated by contact with the surface to be treated. 2. The nonwoven fabric for oil absorption containing feather fibers of the hydroentanglement type according to claim 1, wherein the fiber composition is pulp fibers. 3. The non-woven fabric for oil-absorbing feather fiber blending according to claim 1, wherein the blending ratio of the feather fiber is 20% by weight or more.