KR101684906B1 - Polyolefine staple, nonwoven fabric for hygiene article and manufacturing method thereof - Google Patents

Abstract

The polyolefin-based short fibers for sanitary articles according to the present invention are formed by spinning a composite melt consisting of 70 to 97% by weight of a polyolefin-based resin and 3 to 30% by weight of calcium carbonate and stretching the spinning non-drawn yarn, The polyolefin-based nonwoven fabric for the article is formed of a blend of the polyolefin-based staple fibers and the pulp-derived fibers.

The nonwoven fabric made of the calcium carbonate-containing polyolefin staple fiber according to the present invention has a high whiteness and thus has a visually clean feeling and has a high basis weight, thereby improving the volume feeling and having a high tensile strength to improve durability When used as a surface material for sanitary articles such as diapers, sanitary napkins, or wet tissues, it is possible to provide sanitary articles of excellent quality to consumers. In addition, because calcium carbonate replaces a certain amount of polyolefin resin, especially polypropylene, which is a raw material for producing short fibers or nonwoven fabrics, production costs can be reduced by about 4 to 7% compared with the case of using only polypropylene .

Polyolefin, polypropylene, calcium carbonate, spun lace, nonwoven fabric, wet tissue

Description

TECHNICAL FIELD [0001] The present invention relates to a polyolefin staple fiber, a nonwoven fabric, and a method for manufacturing the same,

More particularly, the present invention relates to a polyolefin-based staple fiber including calcium carbonate, a staple fiber made from the staple fiber, excellent in volume feeling and visually clean And a method for producing the nonwoven fabric.

Polyolefins are light and strong, have excellent abrasion resistance, are relatively simple and inexpensive to manufacture, and are applied to various applications such as plastics, films, and fibers. In the early days of polyolefins, the use of polyolefins was limited due to weak thermal stability, ultraviolet stability, difficulty in dyeing, etc. However, improvement of the polyolefin polymerization process due to the development of catalysts, development of various additives such as heat stabilizers and ultraviolet stabilizers, The application range of automobile interior materials, interior decoration carpets,

On the other hand, since polyolefin staple fibers have advantages such as specific low specific gravity, excellent chemical resistance, low melting point and low cost, compared with other natural or synthetic fibers, the polyolefin staple fibers can be advantageously used as a calendering method, a needle punching method, The nonwoven fabric is processed into various types of nonwoven fabric such as a disposable sanitary article surface material (coverstock) such as a diaper, a sanitary napkin, a wipe and the like, a filter for purification such as an air filter and a water treatment filter It is mainly used.

In general, disposable sanitary articles such as diapers, sanitary napkins, wipes, etc. are in contact with the body, so they must have a visually clean feeling, and in order to stably absorb and retain the substances discharged from the body, A greater degree of appearance or a greater degree of thickening), and a certain degree of strength must be satisfied at the same time, and consumers' demand for using them is increasing. However, the conventional nonwoven fabric made of a polyolefin alone or a composite material obtained by mixing the above short fibers with a pulp material has a limitation in meeting the consumers' demands for a clean feeling and a volume feeling.

The present invention was conceived to overcome the limitations of a clean feeling and a volume feeling in a conventional sanitary article, in particular, a nonwoven fabric used in the manufacture of a wet tissue, and an object of the present invention is to provide a viscous- Which is a raw material for producing a nonwoven fabric having improved durability by having a high basis weight and a high strength, and a method for producing the same.

Another object of the present invention is to provide a nonwoven fabric having a high degree of whiteness, excellent visually clean feeling, high basis weight, improved volume feeling, high strength and improved durability, and a method for producing the same.

In order to solve one object of the present invention, the present invention relates to a polyolefin-based resin for sanitary article formed by spinning a composite melt comprising 70 to 97% by weight of a polyolefin resin and 3 to 30% by weight of calcium carbonate, Fiber. The composite melt is preferably composed of 80 to 90% by weight of a polyolefin resin and 10 to 20% by weight of calcium carbonate. The polyolefin-based staple fibers may further comprise a radial emulsion adhered to the surface, and the amount of the radial emulsion to be adhered is preferably 0.2 to 2 parts by weight based on 100 parts by weight of the polyolefin-based staple fibers.

The present invention also provides a method for producing an unfired gypsum comprising: (a) spinning a composite melt comprising 70 to 97% by weight of a polyolefin resin and 3 to 30% by weight of calcium carbonate at a speed of 50 to 100 m / min through a spinneret step; (b) stretching the undrawn yarn to a stretching ratio of 1.3 to 4 and crimping the yarn in a crimper to produce a drawn yarn; And (c) cutting the drawn yarn to 40 to 100 mm. The present invention also provides a method for producing a polyolefin-based staple fiber for sanitary articles. Applying a radial emulsion on the surface of the stretched yarn between the steps (b) and (c), and heat-fixing and attaching at a temperature of 100 to 200 ° C.

In order to solve the other object of the present invention, the present invention provides a polyolefin-based nonwoven fabric for sanitary articles formed from a blend of the polyolefin-based staple fibers and the pulp-derived fibers. The blended material is preferably composed of 50 to 90% by weight of polyolefin short fibers and 10 to 50% by weight of pulp-derived fibers, wherein the pulp-derived fibers are rayon. The polyolefin-based nonwoven fabric is characterized by being a spunlaced nonwoven fabric.

The present invention also provides a method for producing a carded web, comprising: (a) forming a carded web by carding a blend of 50 to 90% by weight of a polyolefin short fiber according to the present invention and 10 to 50% by weight of a pulp-derived fiber; (B) binding the webs by spraying high pressure water onto the carding web surface; And (c) drying the bound web. The present invention also provides a method for manufacturing a polyolefin spunlaced nonwoven fabric for sanitary articles.

The polyolefin-based nonwoven fabric for sanitary articles according to the present invention can be used as a surface material for hygiene articles such as diapers, sanitary napkins, or wet tissues, and is particularly preferably used for the production of wet tissues.

The nonwoven fabric made of the calcium carbonate-containing polyolefin staple fiber according to the present invention has a high whiteness and thus has a visually clean feeling and has a high basis weight, thereby improving the volume feeling and having a high tensile strength to improve durability When used as a surface material for sanitary articles such as diapers, sanitary napkins, or wet tissues, it is possible to provide sanitary articles of excellent quality to consumers. In addition, because calcium carbonate replaces a certain amount of polyolefin resin, especially polypropylene, which is a raw material for producing short fibers or nonwoven fabrics, production costs can be reduced by about 4 to 7% compared with the case of using only polypropylene .

One aspect of the present invention relates to a polyolefin-based short fiber for sanitary articles and a method for producing the same.

The polyolefin-based staple fibers for sanitary articles according to the present invention are formed by spinning a composite melt comprising 70 to 97 wt% of a polyolefin-based resin and 3 to 30 wt% of calcium carbonate and stretching the spinning non-drawn yarn.

The polyolefin-based resin used for producing the polyolefin-based staple fibers for sanitary articles according to the present invention may be composed of one or more resins selected from the group consisting of polyethylene, polybutylene, and polypropylene, and specifically, polypropylene ( PP, polyethylene (PE), polybutylene (PB), and the like, or may be a random copolymer or block copolymer, or a mixture of polyolefin and another polyolefin. The polyolefin-based resin is preferably characterized by being composed of homopolypropylene alone. At this time, the homopolypropylene has a melt flow index (MFI) of 3 to 30 g / 10 min measured according to ASTM D1238 and an isotactic index (II) measured according to ISO 9113 of not less than 90% , Preferably 90 to 99%, and the melting point measured by a differential scanning calorimeter (DSC) is 160 to 165 ° C. However, the present invention is not limited thereto. As the melt flow index of the homopolypropylene is lower, the stiffness, chemical resistance and low elongation of the fiber can be imparted, but the viscosity is lowered and the workability is deteriorated. When the melt flow index is too high, Having a melt flow index is best suited for fiber spinning. In addition, the isotactic index should be 90% or more to obtain a staple fiber excellent in crystallinity and stiffness of polypropylene, and polypropylene having more than 99% is difficult to commercialize.

The calcium carbonate (CaCO ₃ ) used to produce the polyolefin-based staple fiber for sanitary articles according to the present invention is a carbonate of calcium and is a marble, a calcite, a marble, a limestone, a chalk, a ginkgo, · It is calculated from egg shells, coral, etc. It is generally used as various kinds of neutralizing agent such as raw material of cement, raw material of calcium oxide, iron and building materials. In the present invention, calcium carbonate is a constituent component of a composite melt which is blended with a polyolefin-based resin and melted to produce a polyolefin stepped fiber, and a polyolefin-based staple fiber produced by spinning and stretching a composite melt containing calcium carbonate The surface of which is modified by calcium carbonate. The surface of the nonwoven fabric made of blended polyolefin short fibers or blends of modified monofilaments and pulp materials has a high whiteness and thus has an excellent visually clean feeling and a high basis weight so that the volume feeling is improved, Durability is improved.

The composite melt to be a raw material of the polyolefin short fibers for sanitary articles according to the present invention is composed of 70 to 97% by weight of a polyolefin resin and 3 to 30% by weight of calcium carbonate based on the total weight of the composite melt, 80 to 90% by weight and calcium carbonate 10 to 20% by weight. If the content of calcium carbonate in the composite melt is less than 3% by weight, the whiteness of the nonwoven fabric due to the addition of calcium carbonate improves the visually clean feeling, the volume feeling increases with the basis weight increase, and the durability improves as the tensile strength increases And when the calcium carbonate content exceeds 30%, the radioactive property of the composite melt is poor, making it difficult to commercially produce polyolefin-based staple fibers for sanitary goods. When the content of calcium carbonate in the composite melt is 10 to 20% by weight, the carding property and homogeneity in the process of manufacturing the polyolefin-based staple fiber in the process of manufacturing the nonwoven fabric are good, and durability, whiteness And the improvement of the volume feeling as the basis weight is increased.

In addition, the polyolefin-based short fibers for sanitary articles according to the present invention may be attached with a lubricating oil on its surface. The radial emulsion may be a hydrophilic radial emulsion or a hydrophobic emulsion, depending on the use of the sanitary article. The hydrophilic radial emulsion may be composed of 70 to 85 wt.% Of a nonionic surfactant, 5 to 15 wt.% Of an anionic antistatic agent, and 5 to 15 wt.% Of a non-silicone antifoam agent. The hydrophobic radial emulsion may be a fatty acid amide condensate and a hydrocarbon wax series 95 to 99% by weight of the hydrophobic lubricant and 1 to 5% by weight of the antistatic agent. The adhesion amount of the radial emulsion is not particularly limited, but is preferably 0.2 to 2 parts by weight based on 100 parts by weight of the polyolefin-based staple fiber. If the amount of the radial emulsion to be adhered is less than 0.2 parts by weight based on 100 parts by weight of the polyolefin-based staple fibers, the effect of adhesion of the radial emulsion is insufficient. If the amount of the radial emulsion is more than 2 parts by weight, The radial emulsion may further contain at least one or more kinds of antioxidants, UV stabilizers, process stabilizers, pigments, and the like.

A method for producing a polyolefin-based staple fiber for sanitary articles according to the present invention comprises the steps of: (a) mixing a composite melt comprising 70 to 97% by weight of a polyolefin resin and 3 to 30% by weight of calcium carbonate by spinning through 50 to 100 m / min Spinning at a speed to produce an undrawn yarn; (b) stretching the undrawn yarn to a stretching ratio of 1.3 to 4 and crimping the yarn in a crimper to produce a drawn yarn; And (c) cutting the drawn yarn into 40 to 100 mm.

The method for manufacturing a polyolefin-based staple fiber for sanitary articles according to the present invention is characterized in that a radial emulsion is applied to the surface of the stretched yarn between steps (b) and (c) The method further comprising the steps of:

The composite melt of the step (a) may be prepared by blending and melting a polyolefin-based resin and a calcium carbonate powder in an extruder. Preferably, the composite melt is a polyolefin-based carrier containing a polyolefin resin in the form of pellets and calcium carbonate in the form of pellets And blending and melting the resin. When the calcium carbonate powder itself is put into an extruder and blended with the polyolefin resin in the extruder and melted, there is a possibility that the calcium carbonate powder falls into a gap in the extruder or the like and the performance of the extruder is lowered. The polyolefin-based carrier resin containing pelletized calcium carbonate is prepared in the form of a pellet by mixing and melting the polyolefin-based resin and the calcium carbonate powder before being fed into the extruder, and the weight ratio of the calcium carbonate powder to the polyolefin- : 4 to 8: 2. In the step (a), the melting is performed at about 250 ° C.

In the step (b), the non-drawn filament is drawn by a stretching roll preheated to about 50 to 100 캜. In addition, the application of the spinning oil is effected by spraying or dipping. The heat setting is performed for about 8 to 12 minutes.

The polyolefin-based staple fibers for sanitary articles produced by the method for producing polyolefin-based staple fibers for sanitary articles according to the present invention have a fineness of about 1 to 10 denier and an elongation of about 200 to 300%.

Another aspect of the present invention relates to a polyolefin-based nonwoven fabric for sanitary articles produced from polyolefin-based short fibers for sanitary articles according to the present invention and a method for producing the same.

The polyolefin-based nonwoven fabric for sanitary articles according to the present invention is formed of a blend of polyolefin-based short fibers and pulp-derived fibers according to the present invention. The content of the components constituting the blended product is not particularly limited, but is preferably 50 to 90% by weight of the polyolefin short fibers and 10 to 50% by weight of the pulp-derived fibers based on the total weight of the blended product. If the content of the polyolefin-based short fibers is less than 50% by weight, the binding force of the non-woven fabric is too weak to be applied to sanitary articles. If the polyolefin-based short fiber content exceeds 90% by weight, the content of the pulp- .

The pulp-derived fibers include all of the aggregates of cellulose fibers obtained by mechanical, chemical or intermediate methods in wood or other fiber plants, and fibers that have been chemically treated and reworked. Representative pulp-derived fibers include rayon. Rayon is made of pure cellulose fiber by treating it with wood or anonymous crumbs by suitable chemical method, chemically dissolving it, and then solidifying it into a fibrous form. It has a soft texture, a cold feeling and a strong metallic luster , The water resistance is weak and the wrinkle is good.

The polyolefin-based nonwoven fabric for sanitary goods according to the present invention may have various forms according to the production method thereof, and is preferably a spunlaced nonwoven fabric manufactured by the spun lace method.

The method for producing a polyolefin-based nonwoven fabric for sanitary articles according to the present invention comprises the steps of (a) blending a blend comprising 50 to 90% by weight of the polyolefin-based short fibers of any one of claims 1 to 7 and 10 to 50% Forming a carded web by carding the carded web; (B) binding the webs by spraying high pressure water onto the carding web surface; And (c) drying the bound web.

In the step (a), the carding speed is generally 80 to 150 m / min.

The pressure of water in step (b) is not particularly limited, but is preferably 120 to 150 Bar. If the water pressure is less than 120 bar, the binding speed or binding of the webs may be weak. If the water pressure exceeds 150 bar, the web may be damaged. In addition, the water jetting is generally performed by a water jet type high-speed nozzle. At this time, when the distance between the nozzle and the web is 7.5 to 10 cm, the nonwoven fabric having the highest tensile strength can be obtained.

The drying in the step (c) is carried out at a temperature of about 100 ° C or more, and may be carried out by various methods such as thermal drying or vacuum drying.

The polyolefin-based nonwoven fabric for sanitary articles produced by the above-described method has a high whiteness and thus has excellent visually clean feeling and has a high basis weight, thereby improving the sense of volume, and having high strength to improve durability, Or as a surface material for sanitary articles such as wet tissues, and is particularly preferably used for the production of wet tissues.

Hereinafter, the present invention will be described in more detail with reference to examples. However, the following examples are intended to clearly illustrate the present invention and do not limit the scope of protection of the present invention.

1. Explanation of analysis method

(1) Melt flow index (MFI): Measured according to ASTM D1238. For homopolypropylene and random copolymer series, a load condition of 230 DEG C and 2.16 kg was used.

(2) Isotactic Index (II): Measured according to ISO 9113, and after normal heptane was boiled to dissolve the atactic component, the remaining isotactic component was weighed to be expressed as wt% Is called an isotactic index.

(3) Monofilament fineness: Measured according to ASTM D1577.

(4) Short fiber elongation: The fiber tensile properties were measured according to ASTM D3822.

(5) Radioactivity: The number of times of the occurrence of the single yarn end and the number of the spin drop of the fiber under the spinneret having 32,000 holes was evaluated.

Single thread or drop 3 times / hour less: ○

3 to 10 times / hour of trimming or dropping:

Single yarn or drop 10 times / time out or not possible to spin: X

(6) Nonwoven carding property: When the blending fibers pass through the card machine, a curling phenomenon or a flying phenomenon occurs between the card rolls, or when the web formation is not good, it is judged to be defective.

(7) Uniformity: When the carding web was formed by carding the blending fibers, the degree of even distribution of the blending fibers was visually observed.

(8) Tensile strength of nonwoven fabric: The longitudinal direction (hereinafter referred to as "MD strength") of the nonwoven fabric (hereinafter referred to as "MD strength") and the tensile strength of the nonwoven fabric based on JIS L 1096 cut- (Hereinafter referred to as "CD intensity") was measured.

(9) Whiteness and opacity of the nonwoven fabric: The relative value of the nonwoven fabric was measured when the value of the reference material was taken as 100 using an image analyzer.

2. Polypropylene Staple  Produce

Example 1.

A composite melt of calcium carbonate and homopolypropylene prepared by blending and melting 928 g of a homopolypropylene resin in the form of pellets and 72 g of a homopolypropylene resin containing calcium carbonate in the form of pellets at about 250 DEG C was spin- And spinning at a spinning speed of 80 m / min. The undrawn yarn was drawn by a stretching roll preheated to about 70 DEG C to adjust the stretching ratio to about 2 to 3, and the crimped yarn was crimped in the crimper to produce a drawn yarn. The spinning agent is adhered to the surface of the extruded fiber by dipping or spraying a liquid resin containing a hydrophilic radiation-curable oil to the extruded fiber, and the fiber is opened and fixed at a temperature of 100 ° C for about 10 minutes. And cut to about 40 mm to prepare a polypropylene staple fiber. At this time, the adhesion amount of the radial emulsion after heat setting was about 0.5 part by weight relative to 100 parts by weight of the final polypropylene staple fiber.

The homopolypropylene resin used in Example 1 had a melt flow index (MFI) of 3 to 30 g / 10 min, an isotactic index (II) of 90 to 99%, a differential scanning calorimeter Scanning Calorimeter, DSC) of 160 ~ 165 ° C. The calcium carbonate-containing homopolypropylene resin was a composite resin having a weight ratio of calcium carbonate to homopropylene resin of 7: 3 and a melt flow index (MFI) of 5 to 50 g / 10 min.

Example 2.

Except that 856 g of homopolypropylene resin in the form of pellets and 144 g of homopolypropylene resin containing calcium carbonate in the form of pellets were blended at about 250 DEG C and melted, a composite melt of calcium carbonate and homopolypropylene was used The same as Example 1.

Example 3.

Except that a composite melt of calcium carbonate and homopolypropylene prepared by blending 714 g of homopolypropylene resin in the form of pellets and 286 g of homopolypropylene resin containing calcium carbonate in the form of pellets at about 250 DEG C and melting the mixture was used The same as Example 1.

Comparative Example 1

Example 1 was the same as Example 1, except that a homopolypropylene melt prepared by melting only 1000 g of a homopolypropylene resin in the form of pellets was used.

Comparative Example 2

A composite melt of calcium carbonate and homopolypropylene prepared by blending 500 g of a homopolypropylene resin in the form of pellets and 500 g of a homopolypropylene resin containing calcium carbonate in the form of pellets at about 250 DEG C and melting the melt was used, The radioactivity was very poor and the polypropylene staple fiber could not be produced.

Table 1 below shows the compositions of the constituents of the melts in Examples 1 to 3, Comparative Examples 1 and 2, the spinnability in melt spinning, the fineness of the monofilaments, and the elongation ratios of the monofilaments. 2 is a scanning electron microscope (SEM) photograph of the polypropylene staple fiber prepared in Example 2, and FIG. 2 is a scanning electron microscope (SEM) photograph of the polypropylene staple fiber prepared in Comparative Example 1. FIG.

division The composition of the melt component (based on the total weight of the melt) Polypropylene staple fiber manufacturing process and final properties Homopolypropylene (% by weight) Calcium carbonate (% by weight) Radioactive Thin (denier) Elongation (%) Example 1 95 5 ○ 1.5 230 Example 2 90 10 ○ 1.5 230 Example 3 80 20 △ 1.5 225 Comparative Example 1 100 - ○ 1.5 220 Comparative Example 2 65 35 × (short fibers can not be manufactured) - -

 As shown in Table 1, when the content of calcium carbonate in the melt exceeds 30 wt%, the radioactivity is very poor, so that short fibers can not be produced by a commercial spinning apparatus. In addition, as shown in Figs. 1 and 2, the polypropylene short fiber of Example 2 made of a melt containing calcium carbonate has calcium carbonate particles protruding from the surface, and is a melt of homopolypropylene And showed different surface properties from the polypropylene staple fibers of Comparative Example 1 manufactured.

3. Preparation of polypropylene nonwoven fabric

Example 4.

600 g of polypropylene short fibers of Example 1 and 400 g of rayon fibers were blended and carded at a speed of 100 to 120 m / min to prepare a carded web. The carded web was laminated on a conveyor, and high-pressure water was jetted by a water jet to bind the webs (water entanglement) and dry to prepare a spunlaced nonwoven fabric. The water pressure of water jets was 130 bar and the drying temperature was over 100 ℃.

Example 5.

The same as Example 5 except that 600 g of the polypropylene short fiber of Example 2 and 400 g of rayon fiber were blended.

Example 6.

Except that 600 g of the polypropylene short fibers of Example 3 and 400 g of rayon fibers were blended.

Comparative Example 3

Except that 600 g of the polypropylene short fibers of Comparative Example 1 and 400 g of rayon fibers were blended.

4. Physical properties of polypropylene nonwoven fabric

Table 2 shows the tensile strength and whiteness of the nonwoven fabric prepared in Examples 4 to 6 and Comparative Example 3 due to the workability (carding property, uniformity) and the physical properties of the nonwoven fabric.

division Non-woven fabric workability MD strength
(㎏ _f / 5㎝) CD intensity
(㎏ _f / 5㎝) Whiteness Carding Uniformity Example 4 Good Good 75.96 Example 5 Good Good 8.16 9.53 78.89 Example 6 Good Good 9.07 9.97 80.37 Comparative Example 3 Good Good 5.44 5.89 69.77

As shown in Table 2, as the content of calcium carbonate in the nonwoven fabric increases, the tensile strength increases and whiteness tends to increase.

Fig. 3 is a graph showing the opacity of the nonwoven fabric prepared in Example 5, Example 6, and Comparative Example 3. Fig. As shown in FIG. 3, the opacity of the nonwoven fabric increased as the content of calcium carbonate in the nonwoven fabric increased, showing a similar tendency to whiteness.

4 is a graph showing the basis weight (g / m ² ) of the nonwoven fabric produced in Example 5, Example 6 and Comparative Example 3. As shown in FIG. 4, when the manufacturing process conditions of the spunlaced nonwoven fabric were the same, the basis weight increased as the content of calcium carbonate in the nonwoven fabric increased. From the above results, it can be seen that as the content of calcium carbonate in the nonwoven fabric increases, the voluminousness of the nonwoven fabric (the greater the volume or the greater the volume in the same area) becomes.

Fig. 1 is a scanning electron microscope (SEM) photograph of the polypropylene staple fibers prepared in Comparative Example 1, and Fig. 2 is a scanning electron microscope (SEM) photograph of the polypropylene staple fibers prepared in Example 2. Fig.

Fig. 3 is a graph showing the opacity of the nonwoven fabric prepared in Example 5, Example 6, and Comparative Example 3. Fig.

4 is a graph showing the basis weight (g / m ² ) of the nonwoven fabric produced in Example 5, Example 6 and Comparative Example 3.

Claims (20)

delete delete delete delete delete delete delete delete delete delete (A) mixing a calcium carbonate powder and a polyolefin resin in a weight ratio of 6: 4 to 8: 2, melting and extruding the blended polyolefin carrier resin in a pellet form, Spinning at a speed of 50 to 100 m / min through a spinneret to produce an undrawn yarn; (b) stretching the undrawn yarn to a stretching ratio of 1.3 to 4 and crimping the yarn in a crimper to produce a drawn yarn; And (c) cutting the drawn yarn to 40 to 100 mm. The blended product comprises 50 to 90% by weight of the polyolefin short fibers and 10 to 50% by weight of the pulp-derived fibers, m / min to form a carded web; (B) injecting 120 to 150 Bar of water onto the carded web surface to bind the webs; And (C) drying the bound web, The surface of the polyolefin-based staple fibers is coated with a radiation oil, which is composed of 70 to 85% by weight of a nonionic surfactant, 5 to 15% by weight of an anionic antistatic agent and 5 to 15% by weight of a non- To 2 parts by weight of a polyolefin-based spunlaced nonwoven fabric. The method for producing a polyolefin spunlaced nonwoven fabric according to claim 11, wherein the pulp-derived fibers are rayon. 12. A wet tissue produced by the polyolefin spunlaced nonwoven fabric produced according to claim 11 or 12. delete delete delete delete delete delete delete

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