JP2017115262A - Method for producing nonwoven fabric sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for producing a nonwoven fabric sheet that is obtained by combining wood pulp fibers and synthetic fibers and in which generation of paper powder and fusion between fibers are reduced.SOLUTION: The method for producing a nonwoven fabric sheet which comprises wood pulp fibers and melt-blown fibers is provided. The nonwoven fabric sheet includes: feeding out base paper from a raw sheet roll; folding the base paper in two in a flow direction through folding processing using a folding plate; folding the base paper folded in two in a width direction through folding processing using a folding roll; cutting the folded base paper at a central part thereof with a band saw; cooling the band saw; and collecting paper powder with a dust collector.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a method for manufacturing a nonwoven fabric sheet capable of preventing fiber fusion while suppressing the generation of paper dust.

  Conventionally, rental linen towels have been used for wiping at the time of changing diapers in elderly care sites such as hospital facilities. In this case, the linen towel is impregnated with a dedicated chemical solution in which a cleaning component is dissolved in water, and this is heated before use. This linen towel is a thick cotton towel material, has excellent water retention and heat retention after heating, and has characteristics suitable for wiping use.

  However, linen towels are premised on being collected, washed and reused by specialists, and it is difficult to completely disinfect spores-forming fungi such as Bacillus bacteria. It was also assumed to increase the risk. For this reason, it has been proposed to use a wet wiper in which a non-woven fabric is impregnated with a chemical solution in advance, instead of a linen towel.

  This wet wiper is manufactured by impregnating a non-woven fabric used as a base fabric with a chemical solution containing water or alcohol. Conventionally, the wet wiper removes dirt on the surface of various instruments and the skin of fingers, face, buttocks, etc. And was used for wiping. As a nonwoven fabric used as a wet wiper base fabric, a nonwoven fabric produced from chemical fibers such as rayon is typically used. However, although the nonwoven fabric manufactured from such a chemical fiber has a good touch close to that of a cloth, the strength is lowered by impregnation with a chemical solution, and the feeling of use is inferior to that of a linen towel.

In order to solve such a problem, for example, Patent Document 1 includes cellulosic fibers in an amount of 60% by mass to 99% by mass, acrylic fibers in an amount of 1% by mass to 40% by mass, and a heat-fusible fiber. the not contain more than 10 wt%, a non-woven fabric not containing crimped fibers, the fiber density of the nonwoven fabric under 0.55 g / cm ² load 0.05 g / cm ³ or more 0.1 g / cm ³ or less Non-woven fabrics for wet tissues and wet tissues using the same are disclosed.

JP-A-10-280261

  However, in the production of a nonwoven sheet obtained by combining cellulose-based fibers containing wood pulp fibers and synthetic fibers as described in Patent Document 1, paper powder may be generated during various processes. In addition, when the folded raw roll is cut, there is a possibility that fusion of synthetic fibers occurs. Accordingly, the present invention has been made in view of the above problems, and is a method for producing a nonwoven fabric sheet obtained by combining wood pulp fibers and synthetic fibers, and is capable of generating paper dust and fusing between fibers. It aims at providing the manufacturing method which can be reduced.

  The inventors of the present invention have conducted extensive research in view of the above problems. As a result, in the method for producing a nonwoven sheet containing wood pulp fibers and meltblown fibers, the band saw used when cutting the folded nonwoven sheet is cooled, and paper dust generated in each step is collected by a dust collector. As a result, the present inventors have found that the above problems can be solved, and have completed the present invention. Specifically, the present invention provides the following.

  (1) A first aspect of the present invention is a method for producing a non-woven sheet containing wood pulp fibers and meltblown fibers, wherein the base paper is obtained by a step of unwinding the base paper from a raw roll and a folding process using a folding plate. A step of folding the base paper folded in the flow direction, a step of folding the base paper folded in the width direction by folding using a folding roll, and a step of cutting the central portion of the base paper folded by a band saw, It is a manufacturing method of a nonwoven fabric sheet including the process of cooling a band saw, and the process of collecting paper dust with a dust collector.

  (2) The second aspect of the present invention is the method for producing a nonwoven fabric sheet according to (1), wherein all the rotating rolls provided after the step of feeding the raw paper from the raw fabric roll are used as the driving roll. It is characterized by.

  (3) A third aspect of the present invention is the method for manufacturing a nonwoven fabric sheet according to (1) or (2), wherein the area where the folding process using the folded plate is performed is partitioned, and the paper is collected by a dust collector. It is characterized by collecting powder.

  (4) A fourth aspect of the present invention is the method for producing a nonwoven fabric sheet according to any one of (1) to (3), wherein paper dust is collected from a cut surface cut by a band saw with a dust collector. It is characterized by doing.

  In the manufacturing method of the nonwoven fabric sheet of this invention, the paper dust which generate | occur | produces at each process is collected using a dust collector, cooling the band saw which cut | disconnects the folded base paper. As a result, in producing a non-woven sheet made of wood pulp fibers and synthetic fibers, while suppressing the fusion of synthetic fibers due to overheating of the band saw, the generated paper powder is collected by using a dust collector, thereby obtaining the final product. It is possible to prevent paper dust from being mixed in.

It is drawing which shows the outline of the manufacturing method of the nonwoven fabric sheet of this invention. (A) And (b) is a figure which shows the measurement principle of the tissue softness measuring apparatus TSA. It is a measurement figure of TS7 value and TS750 value of a sample by TSA.

  Hereinafter, modes for carrying out the present invention (hereinafter referred to as embodiments) will be described in detail.

<Method for producing nonwoven sheet>
FIG. 1 is a drawing showing an outline of a method for producing a nonwoven fabric sheet of the present invention. The method for producing a nonwoven fabric sheet of the present invention includes a step of feeding a base paper from the raw fabric roll 1 (step 1), a step of folding the base paper in the flow direction by a folding process using the folding plate 20 (step 2), and , A step of folding the folded base paper in the width direction by folding using the folding roll 22 (step 3), and a step of cutting the center portion of the folded base paper with the band saw 30 (step 4); A step of cooling the band saw 30 (step 5) and a step of collecting paper dust by the dust collector 35 (step 6).

  Here, conventionally, when manufacturing a nonwoven fabric sheet, the rotation rate of the band saw 30 used for cutting the nonwoven fabric sheet may be adjusted in order to prevent generation of dust and fusion of synthetic fibers. When increasing the blade speed of the band saw 30, the generation of dust can be suppressed, but when the synthetic fiber is contained in the nonwoven fabric sheet, due to the heat generated with the increase in the blade speed of the band saw 30, There was a possibility that the synthetic fiber would be fused. In the method for producing a nonwoven fabric sheet of the present invention, the dust collector 35 is provided to collect paper dust generated in each step, so that it is not necessary to increase the blade speed of the band saw 30 excessively, and under such conditions The heat generated under the operation of the band saw 30 can also be removed by cooling the band saw 30, so that the fusion between fibers is effective while minimizing the mixing of paper dust into the final product. Can be prevented.

[Step 1 to Step 3]
In step 1 to step 3, the base paper is fed out from the raw roll 1 and folded into two in the flow direction by folding using the folding plate 20, and folded in two by folding using the folding roll 22. Fold the folded base paper in the width direction. That is, in the present invention, the raw roll 1 manufactured by a predetermined method is first folded in the flow direction, and the folded base paper is folded in the width direction. For this reason, in the state after cut | disconnecting with the band saw 30 mentioned later, a nonwoven fabric sheet will be folded in four.

  In step 1 to step 3, it is preferable that all the rotating rolls (for example, the feed roll 21 and the folding roll 22) (after the step 1) are driven rolls. By using these rotating rolls as drive rolls, the friction between the rotating rolls and the base paper is minimized in the process of manufacturing the nonwoven sheet, and the amount of paper dust generated by the friction between the rotating rolls and the base paper is reduced. Can be reduced.

[Step 4]
In step 4, the center portion of the folded base paper is cut with a band saw 30. Here, the blade width of the band saw 30 is preferably 30 mm or more and 50 mm or less, and the thickness is preferably 0.5 mm or more and 1.2 mm or less. By making the blade width and thickness of the band saw 30 within the above range, the band saw 30 can be efficiently cooled, and even when the blade speed is increased, the synthetic fiber can be prevented from being fused. The nonwoven fabric sheet can be stably cut. The blade speed of the band saw 30 is 330 m / min. 530 m / min. The following is preferable. By making the blade speed of the band saw 30 within the above-mentioned range, it is possible to prevent fusion of synthetic fibers while effectively suppressing the generation of paper dust.

[Step 5]
In step 5, the band saw 30 is cooled. Here, the cooling of the band saw 30 is preferably performed by blowing cool air, but in this case, a total of 4,000 ° C. · L / min. 12,000 ° C. · L / min. It is preferable to cool the band saw 30 by blowing the following cold air. By setting it as the above conditions, fusion | melting of a synthetic fiber can be prevented effectively, suppressing an excessive capital investment.

[Step 6]
In step 6, the paper dust is removed by the dust collector 35. By providing the step 6, it is not necessary to increase the blade speed of the band saw 30 more than necessary, and generation of heat due to an increase in the blade speed can be prevented.

  Here, in the method for producing a nonwoven fabric sheet of the present invention, in order to effectively collect the generated paper dust, an area to be folded using the folding plate 20 is sectioned, and the dust collector 35 is removed from the section. It is preferable to use to collect paper dust. In the area where the folding process using the folding plate 20 is performed, since stress is applied to the base paper, there is a tendency for paper dust to be easily generated. Can be prevented and the dust collection effect can be improved.

  In the present invention, paper dust is preferably collected from the cut surface cut by the band saw 30 by the dust collector 35. Since paper dust is concentrated and generated on the cut surface of the nonwoven fabric sheet by the band saw 30, the paper dust can be effectively collected by collecting the paper powder from this portion by the dust collector 35.

<Nonwoven fabric sheet>
The nonwoven fabric sheet to which the method for producing a nonwoven fabric sheet of the present invention is applied is used as a wiper base fabric that is impregnated with a chemical solution or used in a dry state as necessary. For example, a nonwoven fabric sheet containing 60% by mass or more and 80% by mass or less of wood pulp fibers and 20% by mass or more and 40% by mass or less of meltblown fibers, and the meltblown fibers are integrated with a web made of wood pulp fibers. Is configured. Among the fiber materials used for the production of this nonwoven fabric sheet, wood pulp fibers have a high water absorption property, and melt blown fibers have a feature that they are flexible and easily collect fine dust. By setting the content ratios of the wood pulp fibers and the melt blown fibers within the above ranges, the characteristics of both the water absorption, the flexibility, and the dust collecting property are expressed in a balanced manner.

[Wood pulp fiber]
Wood pulp fibers are produced from conifers and hardwoods. For example, softwood bleached kraft pulp (NBKP), hardwood bleached kraft pulp (LBKP), which is a bleached pulp obtained by bleaching and purifying pulp, and mixtures thereof are used. be able to. Among these, softwood bleached kraft pulp is preferable from the viewpoint of suppressing dust generation.

  The amount of wood pulp fiber used is more preferably 65% by mass or more and 75% by mass or less. By making the usage-amount of wood pulp fiber into the said range, the water absorption of a nonwoven fabric sheet will be improved more, and a balance with a softness | flexibility and dust collection property will also become favorable.

[Melt blown fiber]
The melt blown fiber used in the present invention is a synthetic fiber obtained by a melt blow method using a synthetic resin as a raw material. As the melt blowing method, a known method can be adopted. For example, a synthetic resin is heated to form a molten resin liquid, and this molten resin liquid is extruded into a thread form from a die having a large number of caps. A method of forming a fiber by blowing an air flow onto a molten resin liquid extruded from a die can be mentioned.

  The synthetic resin used for the preparation of the meltblown fiber is not particularly limited, but it is preferable to use a polyolefin polymer such as a polyethylene polymer or a polypropylene polymer, and more preferably a polypropylene polymer. . The polypropylene polymer may be a polypropylene homopolymer or a polypropylene copolymer having another α-olefin such as ethylene, butylene, pentene or hexene as a comonomer, or these may be used in combination. In addition, other polymers and fillers may be added to these polypropylene-based polymers within a range that does not impair the object of the present invention.

  The amount of the meltblown fiber used is more preferably 25% by mass or more and 35% by mass or less. When the amount of the melt blown fiber is within the above range, the flexibility and dust collecting property are further improved, and the balance with water absorption is improved.

  In this invention, it is preferable that the ratio of the meltblown fiber of thickness whose average diameter is 5 micrometers or less among the meltblown fibers which comprise a nonwoven fabric sheet is 50 mass% or more. When the ratio of melt blown fibers having an average diameter of 5 μm or less is within the above range, the texture and wiping properties of the nonwoven fabric sheet are good.

[Other fibers]
Other fibers can be appropriately blended in the nonwoven fabric sheet of the present invention, which is a wiper base fabric, as long as the object of the present invention is not impaired. Examples of such other fibers include mechanical pulp such as groundwood pulp (GP); chemical pulp such as sulfite pulp; semi-chemical pulp obtained by combining chemical treatment and mechanical treatment; kenaf, cotton linter, hemp Non-wood pulp fibers such as waste paper pulp and the like.

[Method for preparing nonwoven sheet]
In the present invention, a nonwoven fabric sheet used as a wiper base fabric can be produced by a method in which a high-temperature fibrous resin obtained by a melt blow method is integrated with a pulp web obtained by pulverizing a wood pulp sheet.

[Basis weight]
The basis weight of the non-woven fabric sheet measured in accordance with JIS P 8124 is preferably 50 g / m ² or more and 90 g / m ² or less per sheet. By making the basis weight of the nonwoven fabric sheet within the above-mentioned range, it is possible to sufficiently maintain the softness while sufficiently securing the strength necessary for the wet wiper and to suppress the manufacturing cost of the nonwoven fabric sheet at a low cost. .

[Specific volume]
The specific volume of the nonwoven fabric sheet, which is a reciprocal of density and tension, is a volume with respect to a certain mass, and is also called a bulk, and is a measure of a bulky state (bulky) such as volume, thickness, and height, is 8 cm ³ / G or more and 15 cm ³ / g or less is preferable. When the specific volume is within the above range, the nonwoven fabric sheet is excellent in soft touch and has a good texture, while maintaining smoothness and touch. The specific volume can be calculated by dividing the thickness of the nonwoven fabric sheet by the basis weight (g / m ² ).

[Water retention amount]
In particular, a wet wiper for personal use, which is used for infants with weak skin and wipes excrement and food spills, holds an appropriate amount of chemical solution. For this reason, it is preferable that the nonwoven fabric sheet | seat of this invention used as a base fabric of such a wet wiper has favorable water retention.

  It is preferable that the water retention amount (TWA: Total Water Absorbency) of the nonwoven fabric sheet is 8.0 g / g or more and 14.0 g / g or less. When the water retention amount of the nonwoven fabric sheet is within the above range, the dirt wiping property is maintained well, and excess water does not remain on the skin after wiping.

  In addition, the amount of water retention can be calculated | required according to the following measuring methods. First, a nonwoven fabric sheet is cut into a 75 mm × 75 mm square to prepare a sample, and the dry weight is measured. Next, after immersing the sample in distilled water for 2 minutes, one corner of the sample becomes the upper apex in a vessel saturated with water vapor (RH 100%), and the two corners adjacent to the apex are set. Hang in a stretched state while supporting the part, and leave it for 30 minutes to measure the weight after draining. For draining, use a paper towel cut to 3 mm x 38 mm. And a measured value is converted into the amount of water retention (g / g) per 1g of samples.

[Tensile strength]
The nonwoven fabric sheet for wipers of the present invention has a dry machine direction tensile strength (DMDT) and a transverse cross direction tensile strength (DCDT) measured in accordance with JIS P8113. ) Geometric average GMT _dry (Geometric Mean Tensile Strength) is preferably 2.0 N / 25 mm or more and 7.0 N / 25 mm or less, and more preferably 2.5 N / 25 mm or more and 6.0 N / 25 mm or less. . The vertical direction tensile strength at water-wet it geometric mean _{GMT wet} of;; (Wet Cross Direction Tensile strength WCDT) is _greater than 90% of _{GMT dry (WMDT Wet Machine Direction Tensile} strength) and transverse tensile strength Is preferable, and it is more preferable that it is larger than 95%. By setting the GMT _dry within the above range, the wiper non-woven fabric sheet has moderate softness suitable for practical use and has sufficient softness. In addition, by setting the GMT _wet within the above range, the nonwoven fabric sheet for wiper is easily torn and soft even when impregnated with a chemical solution.

[Measurement method of TS750 value, TS7 value, and D value by TSA]
The TS7 value representing the softness of the nonwoven fabric sheet that is the base material of the wiper of the present invention, the TS750 value representing the smoothness, and the D value representing the stiffness are measured using a tissue softness analyzer TSA (Tissue Softness Analyzer). . When the tissue softness measuring device TSA presses the rotor with blades rotated from the top of the nonwoven fabric (sample), the vibration data detected by various sensors is subjected to vibration analysis and parameterized (TS value). Softness (feel of touch) is quantitatively evaluated and is a trade name of Emtec Electronic GmbH of Germany (Japan distributor is Japan Luft Co., Ltd.).

  Here, (a) and (b) of FIG. 2 are drawings showing the measurement principle of the tissue softness measuring device 5. A specific measurement method using TSA is as follows.

  (I) As shown in FIG. 2A, a sample 52 (Emtec Electronic GmbH) sample punch is used so as to cover the circular sample stage 51 of the tissue softness measuring apparatus 5 from the outside, and the diameter is about 112.degree. The outer periphery of the sample 52 is fixed by the sample fixing ring 53 and the rubber lip 54.

  (Ii) As shown in FIG. 2 (b), the bladed rotor 55 is pushed from above with a constant and variable force. In this step, the force sensor 56 controls the pushing pressure of the blade 55a. When the pressing pressure reaches 100 mN, the bladed rotor 55 is rotated on the sample 52 at a rotation speed of 2.0 (/ sec) by the motor 55b.

  (Iii) The vibration of the sample stage 51 is measured by a vibration sensor 51a installed inside the sample stage 51, the vibration frequency is analyzed, and parameterized (TS value). The vibration frequency depends on structural dimensions such as creeping and embossing and the rotation speed of the blade 55a. Induction of horizontal vibration (resonance frequency: 6500 Hz) of the blade 55a itself occurs due to momentary interruption by the convex portion of the sample 52 and vibration of the blade 55a when traveling on the surface of the sample 52. The intensity of the maximum peak of the first spectrum from the low frequency side is the TS750 value, and the intensity of the maximum peak of the spectrum including the resonance frequency: 6500 Hz (around 6500 Hz) is the TS7 value.

  (Iv) Next, the amount of deformation in the vertical direction (mm / N; D value) when the sample 52 is deformed without rotating the bladed rotor 55 at an indentation pressure of 100 mN and 600 mN is measured.

  By the procedures (i) to (iv), the softness, smoothness, and rigidity of the nonwoven fabric can be quantified. The measurement was performed 5 times for each sample of the nonwoven fabric, and the average value was defined as the TS7 value, TS750 value, and D value of the nonwoven fabric.

  Moreover, emtec measurement system is used as software for analyzing vibration and parameterizing (TS value). This software is equipped with various algorithms (for example, Base Tissue, Facial, TP, etc.), and automatically acquires the TS7 value, TS750 value, and D value on the software, and these TS7 value, TS750 value, D value or An HF (hand feel) value is calculated from the basis weight, thickness, number of plies, and the like depending on the type of various algorithms. In the present invention, TS7 value, TS750 value and D value are defined instead of HF value, and any algorithm can be used as long as the above measurement conditions are satisfied. TS7 value, TS750 value and D value are: It does not change depending on the algorithm type.

  FIG. 3 is a measurement diagram of the TS7 value and the TS750 value of the sample 52 by the tissue softness measuring device 5. As shown in FIG. 3, the blade 55a is in a fixed vertical position and moves horizontally on the sample 52 from the right to the left. By this horizontal movement, vertical vibration is generated in the sample 52, and the vibration frequency is analyzed to obtain the TS7 value and the TS750 value. Whereas the TS7 value is a value indicating the softness of the material of the sample 52, the TS750 value has a correlation with the strength of smoothness and embossing (irregularity), and the larger the value, the rougher and stronger It means embossing. Moreover, D value has a correlation with the result of a tensile strength test, and it means that it is so hard that a numerical value is small.

(TS750 value)
When the nonwoven fabric sheet to which the present invention is applied is measured by TSA, the TS750 value, which is the intensity of the maximum peak of the first spectrum from the low frequency side automatically acquired by software on the TSA, is 15 dBV ² rms or more. preferably 35dBV at ² rms or less, and more preferably less 16dBV ² rms or more 33dBV ² rms. By keeping the TS750 value within the above range, the smoothness is maintained in an appropriate range, so that the wiping property such as stool and dirt is maintained well, while the tactile feel of the nonwoven fabric sheet is also good. Become.

(TS7 value)
Was also obtained automatically by software on TSA, the TS7 value is the intensity of the maximum peak of the spectrum containing 6500Hz, is preferably not more than 5dBV ² rms or more 12dBV ² rms, 6dBV ² rms or more 8dBV ² rms The following is more preferable. By setting the TS7 value within the above range, a good tactile sensation that is neither too soft nor too hard can be obtained.

(D value)
Further, the D value when the nonwoven fabric sheet is measured by the tissue softness measuring device 5 is preferably 1.0 mm / N or more and 3.5 mm / N or less, and 1.5 mm / N or more and 3.2 mm / N or less. It is more preferable that By making the D value within the above-mentioned range, the nonwoven fabric sheet has a moderate rigidity, and it is possible to suitably wipe off various sites of dirt, including fine sites such as wrinkles. it can.

<Wet wiper>
The nonwoven fabric sheet can be used as a wet wiper by impregnating with a chemical solution as necessary. The wet wiper using the nonwoven fabric sheet to which the present invention is applied has a sufficient strength, a good wiping property, a soft texture and a good surface touch.

[Medical solution]
The chemical solution to be impregnated into the nonwoven fabric sheet to which the present invention is applied contains purified water as a main component, and can be impregnated at a ratio of 200% by mass to 400% by mass with respect to the dry weight of the substrate. By making the impregnation amount within the above range, the wiping performance is excellent and the sticky feeling does not occur. “Containing purified water as a main component” means that 50% by mass or more of purified water is blended with respect to the total amount of the chemical solution.

[Preservative, moisturizer]
The chemical solution impregnated into the nonwoven fabric sheet of the present invention includes, in addition to purified water, a preservative for suppressing the growth of microorganisms, and a moisturizing agent for protecting the skin when sebum is wiped off by wiping. It is preferable to contain at least.

  Preservatives include benzoic acid and its salts, chlorcresol, chlorobutanol, salicylic acid and its salts, sorbic acid and its salts, dehydroacetic acid and its salts, trichlorohydroxydiphenyl ether, paraoxybenzoic acid ester and its sodium salt, phenoxyethanol, phenol , Sodium lauryl dianoethylglycine, resorcin, pantothenyl ethyl ether benzoate, isopropylmethyphenol, cetylpyridinium chloride, benzalkonium chloride, chlorhexidine hydrochloride, orthophenylphenol, chlorhexidine gluconate, chlorxylenol, chlorhexidine, alkyl isobromide Kirolinium, thymol, trichlorocarbanilide, halocarban, hinokitiol, zinc bilithion, butyl carbonate Vammin acid iodide propynyl, polyamino propyl biguanide, etc. can be used. These preservatives may be used alone or in combination of two or more. The blending amount of the preservative is preferably 0.1% by mass or more and 5.0% by mass or less with respect to the chemical solution.

  As humectants, polyhydric alcohols such as glycerin and pentaerythritol, organic acids such as lactic acid and sodium pyrrolidonecarboxylate, which act as humectants of water-soluble components, urea, ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol , 1,3-butylene glycol, polyethylene glycol, alkylene glycols such as diethylene glycol monoethyl ester, etc., and also acts as an emollient for oil-soluble components, natural fats and oils, long chain fatty acids, fatty acid esters, lanolin, lanolin alcohol, polyoxy Lanolins such as ethylene beeswax, phospholipids, ceramides, natural moisturizing components such as aloe extract and honey can be used. These humectants may be used alone or in combination of two or more. The amount of the humectant is preferably 0.0001% by mass or more and 10.0% by mass or less with respect to the chemical solution.

[Other ingredients]
In addition to the above-mentioned components, the chemical solution impregnated with the nonwoven fabric sheet may be blended with various components generally used for quasi-drugs, cosmetics and the like within a range not impairing the effects of the present invention. Specific examples include alcohols such as ethanol and isopropanol, gelling agents, emulsifiers, thickeners, pH adjusters, sequestering agents, surfactants, stabilizers, anti-discoloring agents, perfumes, and coloring agents. Can do.

  As mentioned above, although this invention was demonstrated using embodiment, it cannot be overemphasized that the technical scope of this invention is not limited to the range as described in said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above embodiment. Further, it is apparent from the scope of the claims that embodiments with such changes or improvements can also be included in the technical scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Original roll 20 Folding plate 21 Feed roll 22 Folding roll 30 Band saw 35 Dust collector 5 Tissue softness measuring device 51 Sample stand 51a Vibration sensor 52 Sample 53 Sample fixing ring 54 Rubber lip 55 Bladed rotor 55a Blade 55b Motor 56 Force sensor

Claims (4)

A method for producing a nonwoven sheet comprising wood pulp fibers and meltblown fibers,
A process of unwinding the base paper from the raw roll,
Folding the base paper in the flow direction by folding using a folding plate;
Folding the base paper folded in the width direction by folding using a folding roll;
Cutting the center of the folded base paper with a band saw;
Cooling the band saw;
And a step of collecting paper dust with a dust collector.   The manufacturing method of the nonwoven fabric sheet of Claim 1 which makes all the rotation rolls provided after the process of drawing | feeding out a base paper from a raw fabric roll into a drive roll.   The manufacturing method of the nonwoven fabric sheet of Claim 1 or 2 which partitions the area where folding processing using a folding plate is performed, and collects paper dust with a dust collector.   The manufacturing method of the nonwoven fabric sheet in any one of Claim 1 to 3 which collects paper dust from the cut surface cut | disconnected with the band saw with the dust collector.

Images