WO2017010084A1 - 不織布複合体およびその製造方法 - Google Patents
不織布複合体およびその製造方法 Download PDFInfo
- Publication number
- WO2017010084A1 WO2017010084A1 PCT/JP2016/003291 JP2016003291W WO2017010084A1 WO 2017010084 A1 WO2017010084 A1 WO 2017010084A1 JP 2016003291 W JP2016003291 W JP 2016003291W WO 2017010084 A1 WO2017010084 A1 WO 2017010084A1
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- Prior art keywords
- nonwoven fabric
- fiber
- yarn
- composite
- multilayer
- Prior art date
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- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2401/00—Physical properties
- D10B2401/16—Physical properties antistatic; conductive
Definitions
- the present invention relates to a nonwoven fabric composite in which a yarn composed of functional fibers is introduced into a multilayer long-fiber nonwoven fabric and a method for producing the same.
- melt-spun directly-coupled long fiber nonwoven fabric in which a melt spinning process and a nonwoven fabric forming process are continuously performed using a thermoplastic polymer has been advanced.
- the polymer discharged from the multi-hole nozzle is drawn into fiber by an accompanying air flow with heated air, and is randomly sprinkled on the net, and then heat-fused between the fibers with a hot embossing roll and fixed.
- the bond method is known.
- a melt blown method is known in which a polymer discharged from a porous nozzle is blown off with high-pressure and high-temperature air to form ultrafine fibers, and is blown onto a breathable mesh to form a nonwoven fabric.
- melt blown nonwoven fabric (M) made of ultrafine fibers is excellent in filter performance, and has the same structure as a woven or knitted fabric for clothing by forming a multilayer body with the spunbond nonwoven fabric (S), for example, a three-layer structure of SMS. It is a fabric with a high degree of elongation, and it has a dustproof and waterproof performance. Therefore, it is widely used for work clothes, packing materials, daily goods, building materials and the like. In particular, surgical clothes using disposable SMMMS are widely used from the viewpoint of preventing infection.
- a multilayer long fiber nonwoven fabric represented by SMS is used as work clothes
- various functions such as antistatic properties, hydrophilic properties, water repellency, and insect repellent properties may be imparted depending on the application.
- a processing method has been proposed in which a functional agent such as an antistatic agent, a hydrophilic agent, a water repellent, and an insect repellent is applied to the nonwoven fabric by coating or dipping.
- the other is to introduce a conductive fiber into the nonwoven fabric and discharge static electricity generated in the nonwoven fabric through the conductive fiber, or to remove static electricity in the vicinity by means of corona discharge using the conductive fiber (for example, Patent Documents). 2).
- This antistatic function is required in various directions, and various functions are required such as prevention of crackling in clothes, prevention of dust adhesion in the air, and prevention of flammable explosion due to electrostatic discharge.
- the explosion-proof standard is determined in JIS T8118 for work clothes to prevent explosion.
- Patent Document 1 relates to a method for producing a nonwoven fabric by short fiber carding and hydroentanglement, a step of producing a tow as a raw material of short fibers from a thermoplastic resin, It includes a process of heat setting, application of an antistatic agent and shortening the cut fiber, and a process of forming a nonwoven fabric by carding and hydroentanglement. Therefore, there is a problem that the manufacturing process becomes complicated and the cost increases.
- Patent Document 1 can reliably prevent the generation of static electricity because sufficient moisture for preventing charging cannot be secured under low humidity conditions (for example, 20% RH or less). As a result, there is a problem that it is difficult to satisfy the above-mentioned explosion-proof standard.
- Patent Document 2 is a method of mixing 2% of short fibers made of conductive fibers in the production of a nonwoven fabric made of short fibers, and produces tow that is a raw material for short fibers from a thermoplastic resin.
- a process a process for drawing, heat setting, applying an antistatic agent, shortening the cut fiber, and a process for forming a nonwoven fabric by carding and partial heat fusion. Therefore, there is a problem that the manufacturing process becomes complicated and the cost increases.
- the present invention has been made in view of the above-described problems, and provides a nonwoven fabric composite that can satisfy explosion-proof standards at a low cost with a smaller number of steps than the conventional method, and a method for manufacturing the same.
- the purpose is to provide.
- the nonwoven fabric composite of the present invention is a multilayer long-fiber nonwoven fabric (A) in which a plurality of nonwoven fabrics continuously obtained by spinning a resin having melted fiber-forming properties are laminated.
- a nonwoven fabric composite in which a yarn (B) formed of fibers different from the fibers forming the multilayer long-fiber nonwoven fabric (A) is introduced by an in-line lamination method, wherein the yarn (B) is a conductive fiber It is characterized by being a thread
- the method for producing a nonwoven fabric composite of the present invention includes a multilayer long fiber nonwoven fabric (A) in which a plurality of nonwoven fabrics continuously obtained by spinning a melted fiber-forming resin is laminated, A method for producing a nonwoven fabric composite in which a yarn (B) formed of a fiber different from the fibers forming the fiber nonwoven fabric (A) is introduced, wherein an in-line lamination method is performed during the production process of the multilayer long fiber nonwoven fabric (A). An introduction step of introducing the yarn (B) by the method, wherein the yarn (B) is a yarn containing a conductive fiber.
- an inexpensive and simple method can provide a nonwoven fabric composite that can exhibit good antistatic performance under low humidity conditions and a method for producing the same.
- FIG. 2 is a cross-sectional view showing the nonwoven fabric composite according to the embodiment of the present invention, and is a cross-sectional view taken along the line EE of FIG.
- FIG. 1 is a plan view showing a nonwoven fabric composite according to an embodiment of the present invention.
- FIG. 2 is a cross-sectional view showing the nonwoven fabric composite according to an embodiment of the present invention. It is.
- the nonwoven fabric composite 1 of the present embodiment includes a multilayer long-fiber nonwoven fabric (A) in which a plurality of nonwoven fabrics 2 to 4 continuously obtained by spinning a melted fiber-forming resin is laminated, and in-line It is introduced into the multilayer long-fiber nonwoven fabric (A) by a laminating method and includes a yarn (B) formed of fibers different from the fibers forming the multilayer long-fiber nonwoven fabric (A).
- Nonwoven fabrics 2 to 4 are obtained continuously by spinning a melted resin having a fiber-forming property.
- the resin for forming the nonwoven fabrics 2 to 4 for example, polypropylene, polyethylene, polyester, polyamide, and modified polymers of these resins can be used. In addition, these can be used individually or in combination of 2 or more types.
- the multilayer long-fiber nonwoven fabric (A) in the nonwoven fabric composite 1 of the present invention is a nonwoven fabric including at least one of a spunbond nonwoven fabric and a meltblown nonwoven fabric.
- the multilayer long fiber nonwoven fabric (A) is composed of alternately laminated spunbond nonwoven fabrics 2 and 4 and meltblown nonwoven fabric 3 (two layers of spunbond nonwoven fabrics 2 and 4 and It has a three-layer structure (SMS structure) in which the melt-blown nonwoven fabric 3 is alternately laminated) and has the melt-blown nonwoven fabric 3 as an intermediate layer.
- SMS structure three-layer structure
- the average fiber diameter of the fibers constituting the spunbonded nonwoven fabrics 2 and 4 depends on the type and molecular weight of the polymer, but ensures good melt spinnability without yarn breakage or shots, and the high elongation of the fibers. From the viewpoint of achieving a balance, it is preferably 5 ⁇ m or more and 50 ⁇ m or less, more preferably 10 ⁇ m or more and 40 ⁇ m or less, and particularly preferably 15 ⁇ m or more and 30 ⁇ m or less.
- the “average fiber diameter” referred to here is the diameter of one fiber when the fiber cross section is a circular cross section, and the average value of the long diameter and the short diameter when the fiber cross section is an irregular cross section.
- the average fiber diameter of the fibers constituting the melt blown nonwoven fabric 3 is preferably 0.1 ⁇ m or more and 4.0 ⁇ m or less, more preferably 0.2 ⁇ m or more and 2.0 ⁇ m or less, and 0.5 ⁇ m or more and 1. Particularly preferably, it is 0 ⁇ m or less.
- the “average fiber diameter” referred to here is the diameter of one fiber when the fiber cross section is a circular cross section, and the average value of the long diameter and the short diameter when the fiber cross section is an irregular cross section.
- the spunbond nonwoven fabrics 2 and 4 can be manufactured by a conventionally known spunbond method, and the meltblown nonwoven fabric 3 can be manufactured by a conventionally known meltblown method.
- the basis weight of the multilayer nonwoven fabric of the present invention is not particularly limited, and can be set according to the purpose of use. Particularly in the case of apparel use such as protective clothing, those having a weight per unit area of 20 to 100 g / m 2 can be used from the viewpoint of the strength as a fabric and the feeling of wearing.
- the melt blown nonwoven fabric 3 of the intermediate layer is formed.
- the resin forming the spunbond nonwoven fabric 4 is spun on the melt blown nonwoven fabric 3 to continuously form the upper spunbond nonwoven fabric 4 to obtain a three-layer structure.
- a plurality of yarns (B) are used and a plurality of yarns (B) are arranged apart from each other.
- the yarn (B) is formed of a fiber different from the fibers forming the multilayer long fiber nonwoven fabric (A).
- the yarn (B) is a conductive fiber.
- a yarn containing is used.
- the antistatic function derived from electroconductive performance can be provided with respect to a thread
- carbon-based conductive fibers can be used as conductive fibers.
- metal-based conductive fibers can be used individually or in combination of 2 or more types.
- Examples of yarns containing carbon-based conductive fibers include conductive fibers that are composite-spun using a polymer kneaded with conductive carbon, conductive fibers that are manufactured by coating fibers with conductive carbon, or conductive carbon fibers. It can be used alone or in combination with other fibers.
- Examples of conductive fibers include “Kuraraybo” made by Kuraray Trading, “CNTEC” made by Kuraray, “Beltron” made by KB Seiren, “Megana” made by Unitika, “RESISTATA” made by Shakespeare, and carbon made by Toray. Examples thereof include fiber “Torayca” and carbon fiber “Pyrofil” manufactured by Mitsubishi Rayon.
- a metal-plated fiber or a metal fiber can be used alone or in combination with other fibers.
- a metal-plated fiber or a metal fiber can be used alone or in combination with other fibers.
- the average value of the intervals T of the yarns (B) shown in FIG. 2 is not more than a certain interval, particularly not more than 2.5 cm. Is preferred.
- the triboelectric charge amount of the nonwoven fabric composite 1 measured in accordance with JIS T8118 is preferably 7.0 ⁇ C / m 2 or less.
- the type of the yarn (B) is not particularly limited, and spun yarns composed of short fibers, multifilaments, monofilaments, tape yarns, and composite yarns thereof can be used.
- nonwoven fabric composite body 1 having an antistatic function of the present embodiment can be used for the following applications, for example.
- the nonwoven fabric composite 1 having the above-described SMS structure is widely used as a disposable protective garment because it has appropriate flexibility and breathability as a clothing material and has a dustproof function due to the filter action of an extremely fine meltblown layer.
- the antistatic function for clearing the explosion-proof standard (0.6 ⁇ C / point) required for protective clothing in JIS T8118 is given to the disposable protective clothing. can do.
- protective clothing that can be safely operated without depending on humidity conditions at the site where there is a risk of explosion.
- it can be used for field work in a chemical plant, a chemical laboratory, a gas station, a painting work, a tanker work, a food factory, a printing factory, or the like that handles an organic solvent or a combustible powder with fear of explosion.
- anti-static work clothes are used to prevent damage to electrical parts due to electrostatic discharge charged in work clothes.
- the nonwoven fabric composite body 1 which has the antistatic function of this embodiment can be utilized as a cloth material for this work clothes.
- the thread (B) introduced in the present invention is made conductive. By using it as a long fiber, it is possible to make a multi-layer long fiber nonwoven fabric with low dust generation, which can be suitably used for work clothes.
- the nonwoven fabric composite 1 having performance can be used as a constituent material for clothes, storage bags, and mats.
- it can be used in the field of attracting and adhering dust in the air due to electrostatic charging and preventing troubles that become dirty. For example, by using it for various packing materials, curing sheets, partitions, building materials, etc., electrostatic charging of the surface can be prevented, and contamination due to attracting and adhering dust can be prevented.
- the trouble of clinging the clothes to be worn due to electrostatic charging can be solved by using the nonwoven fabric composite 1 having the antistatic function of this embodiment.
- FIG. 3 is a schematic view for explaining a method for producing a nonwoven fabric composite according to an embodiment of the present invention.
- the manufacturing method of the present embodiment includes a multilayer long fiber nonwoven fabric manufacturing step and an introduction step of introducing the yarn (B) by an in-line lamination method during the manufacturing process of the multilayer long fiber nonwoven fabric (A).
- a continuous long fiber is obtained by supplying a fiber 12 obtained by melt-spinning a resin forming the spunbond nonwoven fabric 2 onto a traveling mesh belt conveyor 11 and passing it through a roller 13.
- a spunbond nonwoven fabric 2 is formed.
- the fiber 14 obtained by melt spinning the resin forming the melt blown nonwoven fabric 3 on the spunbond nonwoven fabric 2 is sprayed by using a high-speed and high-temperature air current, and by the action of this air current, the molten resin is stretched to become ultrafine fibers, A meltblown nonwoven fabric 3 made of continuous long fibers is formed on the spunbond nonwoven fabric 2.
- the yarn (B) is introduced onto the melt blown nonwoven fabric 3 constituting the nonwoven fabric having the above-described two-layer structure (SM structure) by an in-line lamination method.
- the “in-line lamination method” as used herein refers to a process for producing a multilayer long-fiber nonwoven fabric (A) in which two or more layers are continuously combined in a spunbond process and a meltblown process, which are direct-spun nonwoven fabric production processes.
- the yarn (B) separately prepared is introduced into the multilayer long fiber nonwoven fabric (A) in the middle of production.
- the yarn (B) is prepared in a state of being wound around the bobbin 19 or the like, and the yarn (B) released from the bobbin 19 is positioned via the guides 21 to 23. It reaches the guide 24 and adheres to the non-woven fabric (melt-blown non-woven fabric 3) on the belt conveyor 11 at the position Y1 shown in FIG. Then, the yarn (B) is pulled along with the movement of the nonwoven fabric accompanying the movement of the belt conveyor 11, and the yarn (B) is fed out from the bobbin 19.
- the yarn (B) is introduced by the in-line lamination method during the manufacturing process of the multilayer continuous fiber nonwoven fabric (A) by such a method.
- a tension adjusting device 25 can be installed as shown in FIG.
- the tension adjusting device 25 can use a tension adjusting device that is used when unwinding a yarn from a wound yarn in a warp of a woven fabric or a knitting production process.
- a tension adjusting device that is used when unwinding a yarn from a wound yarn in a warp of a woven fabric or a knitting production process.
- washer tensor There are washer tensor, ring tensor, etc.
- Nonwoven fabric composite production process Next, after the nonwoven fabric having the layer structure (SM structure) in which the yarn (B) is introduced onto the melt blown nonwoven fabric 3 is passed through the roller 15, a resin for forming the spunbond nonwoven fabric 4 is formed on the melt blown nonwoven fabric 3.
- SM structure layer structure
- a resin for forming the spunbond nonwoven fabric 4 is formed on the melt blown nonwoven fabric 3.
- the yarn (B) in the introducing step, has a multilayer length by moving the multilayer long-fiber nonwoven fabric (A) in a state where the yarn (B) is sandwiched between the plurality of nonwoven fabrics. It becomes the structure introduced into a fiber nonwoven fabric (A).
- the produced nonwoven fabric composite 1 is moved in the direction of the arrow X by the belt conveyor 11 and passes through the roller 18 to be taken out to the outside.
- the explosion-proof standard can be cleared at a low cost with a smaller number of steps than the conventional method. It becomes possible to provide the nonwoven fabric composite 1.
- the yarn (B) is provided between the melt-blown nonwoven fabric 3 of the intermediate layer of the multilayer long-fiber nonwoven fabric (A) and the spunbond nonwoven fabric 4 of the upper layer. Since it is set as the structure (namely, the structure which arrange
- a multilayer length having a three-layer structure in which the melt-blown nonwoven fabric 3 is an intermediate layer by alternately laminating the two-layer spunbond nonwoven fabrics 2 and 4 and the one-layer melt-blown nonwoven fabric 3.
- SMS structure three-layer structure
- the configuration of the multilayer long-fiber non-woven fabric (A) is not limited thereto, and may include at least one of a spunbond non-woven fabric and a melt blown non-woven fabric.
- two-layer melt blown nonwoven fabric and one-layer spunbond nonwoven fabric are alternately laminated, and a three-layer structure (MSM structure) with a spunbond nonwoven fabric as an intermediate layer, or a three-layer structure consisting of only a plurality of spunbond nonwoven fabrics ( It is good also as a structure which uses the multilayer long fiber nonwoven fabric which has a SSS structure.
- the inline lamination method of this invention was set as the structure which introduce
- the timing of introduction of the yarn (B) in is not particularly limited as long as it is during the production process of the multilayer continuous fiber nonwoven fabric (A).
- the spunbond nonwoven fabric 2 is formed by supplying the fiber 12 obtained by melt spinning the resin forming the spunbond nonwoven fabric 2 on the belt conveyor 11 and passing the roller 13.
- the yarn (B) released from the bobbin 19 is attached to the spunbonded nonwoven fabric 2 on the belt conveyor 11 at the position Y2 shown in FIG.
- the melt-blown nonwoven fabric 3 serving as an intermediate layer is formed on the spunbond nonwoven fabric 2
- the spunbond nonwoven fabric 4 is formed on the melt-blown nonwoven fabric 3, thereby forming the nonwoven fabric composite shown in FIG.
- the body 20 can be obtained.
- the spunbond nonwoven fabrics 2 and 4 and the melt blown nonwoven fabric 3 are alternately laminated and has a three-layer structure (SMS structure) with the melt blown nonwoven fabric 3 as an intermediate layer.
- a multilayer long-fiber nonwoven fabric (A) is formed.
- the yarn (B) released from the bobbin 19 is adhered to the spunbond nonwoven fabric 4 constituting the upper layer of the multilayer long-fiber nonwoven fabric (A) at the position Y3 shown in FIG.
- the composite 30 can be obtained.
- the yarn (B) is attached to the surface of the multilayer long-fiber nonwoven fabric (A) manufactured in advance, an adhesive is used to prevent the yarn (B) from falling off, or a heat-sealing fiber is used. For example, it is necessary to fix the yarn (B) to the surface of the multilayer long-fiber nonwoven fabric (A).
- the thread (B) released from the bobbin 19 is attached on the belt conveyor 11 at the position Y4 shown in FIG.
- the spunbond nonwoven fabrics 2 and 4 and the melt blown nonwoven fabric 3 are alternately laminated on the yarn (B), and a multilayer having a three-layer structure (SMS structure) with the melt blown nonwoven fabric 3 as an intermediate layer.
- SMS structure three-layer structure
- the yarn (B) is attached to the surface of the multilayer long-fiber nonwoven fabric (A).
- a yarn having an antistatic function derived from the conductive performance is used as the yarn (B), but the function of the yarn (B) is not limited to this.
- electromagnetic shielding performance derived from conductive performance, high strength performance, high shrinkage performance, low shrinkage performance, moisture absorption performance, far infrared radiation performance, heat storage heat retention performance, moisture absorption heat generation performance, hydrophilic performance, water repellency performance, deodorization performance Insect repellent performance, insecticidal performance, attracting performance of animals and insects, antibacterial performance, antifungal performance, fragrance performance, and the like can be employed.
- the yarn (B) is introduced using the positioning guide 24 in the introducing step.
- the weft yarn is driven by a general method or the yarn (B) using a weft insertion device.
- weft insertion devices that insert wefts between warps include rapier method, slewer method, water jet method, air jet method, etc. Of these, air jet method with high weft driving frequency is adopted. It is preferable to do.
- the yarn (B) is intermittently introduced at substantially constant intervals in a direction substantially orthogonal to the flow of the nonwoven fabric on the belt conveyor 11 described above.
- this method and the yarn introduction method in the above embodiment that is, the yarn (B) is attached to the nonwoven fabric on the belt conveyor 11, and the yarn (B) is moved along with the movement of the nonwoven fabric based on the movement of the belt conveyor 11.
- the nonwoven fabric composite 1 can be given design properties.
- the yarn (B) to be introduced into the multilayer long fiber nonwoven fabric (A) is intentionally introduced in a state other than linear.
- the nonwoven fabric composite 10 having a design-like appearance can be obtained by introducing the yarn (B) so as to draw a curve having a wavy shape.
- the tension adjusting device 25 described above changes the tension of the thread (B) to introduce the thread (B), or the positioning guide 24 is intentionally moved to move the thread (B ).
- a production method not corresponding to the production method of the nonwoven fabric composite of the present invention for example, a production method in which the above-mentioned inline lamination method is not used and a multilayer long-fiber nonwoven fabric and a separately prepared yarn are combined is considered. It is done. That is, for example, in a process of bonding two kinds of long-fiber nonwoven fabrics produced in advance, a production method in which a thread is introduced between two kinds of long-fiber nonwoven fabrics to form an integrated composite may be considered.
- a demerit which becomes high cost.
- the manufacturing method other than the in-line lamination method of the present invention the number of steps increases, which is disadvantageous in terms of cost.
- Example 1 (Production of nonwoven fabric composite) In a mass production machine having a width of 2.4 m, a yarn containing conductive fibers was produced during the manufacturing process of a multilayer long-fiber nonwoven fabric (50 g / m 2 ) having a three-layer structure (SMS structure) made of polypropylene resin. Introduced.
- SMS structure three-layer structure
- a positioning guide in which 125 yarn introduction ports were linearly formed at intervals of 20 mm pitch was installed, and 125 yarns were passed through 125 yarn introduction ports of the positioning guide.
- the tips of 125 yarns are attached to the meltblown nonwoven fabric via positioning guides to move the belt conveyor.
- the yarn was also pulled and the yarn was fed out from the bobbin, and the yarn was introduced onto the meltblown nonwoven fabric.
- a spunbond non-woven fabric is formed on the melt-blown non-woven fabric using an SMS mass production machine.
- SM structure layer structure
- a nonwoven fabric composite was obtained in which yarn was introduced between the meltblown nonwoven fabric as the intermediate layer and the upper layer spunbond nonwoven fabric.
- the average value of the interval between each of the 125 yarns introduced was 20 mm. Also, when the yarn is unwound from the bobbin, the tension adjusting device (manufactured by Yuasa Yodo Co., Ltd. Product name: washer tenter).
- Example 2 First, as a conductive yarn, Kurabobo (Kuraray Trading Co., Ltd., trade name: C22T4) was used, and 100 conductive yarns were prepared in a bobbin winding state.
- a positioning guide in which 100 yarn introduction ports were linearly formed at intervals of 25 mm pitch was installed, and 100 yarns were passed through 100 yarn introduction ports of the positioning guide.
- the tip of 100 yarns is attached to the meltblown nonwoven fabric via a positioning guide, and accompanying the movement of the belt conveyor Along with the movement of the nonwoven fabric, the yarn was also pulled into a state where the yarn was fed out from the bobbin, and the yarn was introduced onto the meltblown nonwoven fabric.
- a spunbond non-woven fabric is formed on the melt-blown non-woven fabric using an SMS mass production machine.
- a nonwoven fabric composite 50 g / m 2 in which yarn was introduced between the meltblown nonwoven fabric as the intermediate layer and the upper layer spunbond nonwoven fabric was obtained.
- Example 1 the average value of the interval between each of the 125 yarns introduced was 25 mm.
- a tension adjusting device manufactured by Yuasa Yodo Co., Ltd., trade name: Washer Tenter was installed between the time when the yarn traveled from the bobbin to the positioning guide.
- Example 1 A nonwoven fabric composite was produced in the same manner as in Example 1 except that the conductive yarn was not used. Thereafter, in the same manner as in Example 1 above, the triboelectric charge resistance of the nonwoven fabric composite under the conditions of 20 ° C. and 30% RH was measured. The results are shown in Table 1.
- Comparative Example 2 A diluted solution obtained by diluting an antistatic agent (trade name: Electro Stripper QN, manufactured by Kao Corporation) 100 times with respect to the nonwoven fabric composite prepared in Comparative Example 1 is sprayed at a rate of about 100 g / m 2. And dried.
- an antistatic agent trade name: Electro Stripper QN, manufactured by Kao Corporation
- the triboelectric charge resistance of the nonwoven fabric composites of Examples 1 and 2 in which conductive yarn was introduced into a multilayer long fiber nonwoven fabric by the in-line lamination method is an explosion-proof standard defined in JIS T8118. It is 0 ⁇ C / m 2 or less, and it can be seen that it has antistatic performance that satisfies explosion-proof standards.
- the friction-proof charge amount of the protective clothes of the jumpsuit type produced using the nonwoven fabric composites of Examples 1 and 2 is 0.6 ⁇ C / point or less, which is the explosion-proof standard of protective clothes defined in JIS T8118. It can be seen that it has antistatic performance that satisfies explosion-proof standards.
- the friction-proof charge amount of the nonwoven fabric composite of Comparative Example 1 in which the conductive yarn is not introduced into the multilayer long-fiber nonwoven fabric by the in-line lamination method is 7.0 ⁇ C / m 2 which is an explosion-proof standard. It is clear that the antistatic performance is poor.
- the triboelectric charge of the nonwoven fabric composite of Comparative Example 2 treated with the antistatic agent is 7.0 ⁇ C, which is an explosion-proof standard at a relatively high humidity (30% RH). / M 2 or less, but under the low humidity condition (20% RH), it greatly exceeds the explosion-proof standard 7.0 ⁇ C / m 2 , indicating that the antistatic performance under the low humidity condition is poor.
- the present invention is particularly useful for a nonwoven fabric composite in which a yarn composed of functional fibers is introduced into a multilayer long fiber nonwoven fabric and a method for producing the same.
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Abstract
Description
図3に示すように、まず、走行するメッシュ状のベルトコンベア11上に、スパンボンド不織布2を形成する樹脂を溶融紡糸した繊維12を供給し、ローラー13を通過させることにより、連続した長い繊維からなるスパンボンド不織布2を形成する。
次に、上述の2層構造(SM構造)の不織布を構成するメルトブローン不織布3上に、インライン積層法により、糸(B)の導入を行う。
次に、ローラー15に、メルトブローン不織布3上に糸(B)が導入された層構造(SM構造)を有する不織布を通過させた後、メルトブローン不織布3上に、スパンボンド不織布4を形成する樹脂を溶融紡糸した繊維16を供給して、連続した長い繊維からなるスパンボンド不織布4を形成し、ローラー17を通過させることにより、図1,2に示す不織布複合体1を作製する。
(不織布複合体の作製)
2.4m幅のSMS量産機において、ポリプロピレン樹脂を原料とした3層構造(SMS構造)を有する多層長繊維不織布(50g/m2)の製造工程中に、導電性を有する繊維を含む糸を導入した。
次に、摩擦耐電電荷量測定装置(ADC(株)製、商品名:デジタルエレクトロメーターを用いて、JIS T8118に準拠して、20℃、30%RHの条件下で、作製した不織布複合体の摩擦耐電電荷量を測定した。
まず、導電糸として、クラカーボ(クラレトレーディング(株)製、商品名:C22T4)を使用するとともに、この導電糸をボビン巻状態で100本、準備した。
導電糸を使用しなかったこと以外は、上述の実施例1と同様にして、不織布複合体を作製した。その後、上述の実施例1と同様にして、20℃、30%RHの条件下における不織布複合体の摩擦耐電電荷量を測定した。以上の結果を表1に示す。
比較例1で作製した不織布複合体に対して、帯電防止剤(花王(株)製、商品名:エレクトロストリッパーQN)を100倍希釈した希釈液を約100g/m2の割合で噴霧し、常温で乾燥した。
2 スパンボンド不織布
3 メルトブローン不織布
4 スパンボンド不織布
10 不織布複合体
11 ベルトコンベア
12 樹脂を溶融紡糸した繊維
14 樹脂を溶融紡糸した繊維
16 樹脂を溶融紡糸した繊維
19 ボビン
20 不織布複合体
24 位置決めガイド
26 糸導入口
30 不織布複合体
A 多層長繊維不織布
B 糸
T 糸の間隔
Y1~Y4 糸の付着位置
Claims (9)
- 溶融させた繊維形成性を有する樹脂を紡糸することにより連続的に得られた不織布が複数積層された多層長繊維不織布(A)に、インライン積層法により、前記多層長繊維不織布(A)を形成する繊維とは異なる繊維により形成された糸(B)を導入した不織布複合体であって、
前記糸(B)が、導電性を有する繊維を含む糸であることを特徴とする不織布複合体。 - 前記糸(B)が複数本用いられるとともに、該複数本の糸(B)が離間して配置され、
JIS T8118に準拠して測定された前記不織布複合体の摩擦帯電電荷量が7.0μC/m2以下であることを特徴とする請求項1に記載の不織布複合体。 - 前記多層長繊維不織布(A)が、スパンボンド不織布およびメルトブローン不織布の少なくとも一方を含むことを特徴とする請求項1または請求項2に記載の不織布複合体。
- 前記樹脂が、ポリプロピレン、ポリエチレン、ポリエステル、ポリアミド、およびそれらの変性ポリマーからなる群より選択された少なくとも1種であることを特徴とする請求項1~請求項3のいずれか1項に記載の不織布複合体。
- 溶融させた繊維形成性を有する樹脂を紡糸することにより連続的に得られた不織布が複数積層された多層長繊維不織布(A)に、前記多層長繊維不織布(A)を形成する繊維とは異なる繊維により形成された糸(B)を導入した不織布複合体の製造方法であって、
前記多層長繊維不織布(A)の製造工程中に、インライン積層法により前記糸(B)の導入を行う導入工程を備え、
前記糸(B)が、導電性を有する繊維を含む糸である
ことを特徴とする不織布複合体の製造方法。 - 前記導入工程において、前記糸(B)が複数本用いられるとともに、該複数本の糸(B)が離間して配置され、
JIS T8118に準拠して測定された前記不織布複合体の摩擦帯電電荷量が7.0μC/m2以下であることを特徴とする請求項5に記載の不織布複合体の製造方法。 - 前記多層長繊維不織布(A)が、スパンボンド不織布およびメルトブローン不織布の少なくとも一方を含むことを特徴とする請求項5または請求項6に記載の不織布複合体の製造方法。
- 前記樹脂が、ポリプロピレン、ポリエチレン、ポリエステル、ポリアミド、およびそれらの変性ポリマーからなる群より選択された少なくとも1種であることを特徴とする請求項5~請求項7のいずれか1項に記載の不織布複合体の製造方法。
- 前記導入工程において、前記複数の不織布の間に前記糸(B)を挟み込んだ状態で、前記多層長繊維不織布(A)を移動させることにより、前記糸(B)が多層長繊維不織布(A)に導入されることを特徴とする請求項5~請求項8のいずれか1項に記載の不織布複合体の製造方法。
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CN201680041502.6A CN107849767A (zh) | 2015-07-13 | 2016-07-12 | 无纺布复合体及其制造方法 |
US15/744,546 US20180200984A1 (en) | 2015-07-13 | 2016-07-12 | Nonwoven fabric composite and method for manufacturing the same |
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Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS50126978A (ja) * | 1974-03-22 | 1975-10-06 | ||
JPS58143886U (ja) * | 1982-03-23 | 1983-09-28 | オリエンタル・アスベスト株式会社 | 金属繊維糸入りガラス不織布 |
JPH05279946A (ja) * | 1991-12-31 | 1993-10-26 | Kimberly Clark Corp | 導電性溶融吹込ウェブ製造方法、導電性積層体製造方法及びこれらの方法に従って作った導電性製品 |
JP2003105664A (ja) * | 2001-09-28 | 2003-04-09 | Unitika Ltd | 制電性長繊維不織布 |
US20040127132A1 (en) * | 2002-10-23 | 2004-07-01 | Bba Nonwovens Simpsonville, Inc. | Nonwoven protective fabrics with conductive fiber layer |
-
2016
- 2016-07-12 US US15/744,546 patent/US20180200984A1/en not_active Abandoned
- 2016-07-12 WO PCT/JP2016/003291 patent/WO2017010084A1/ja active Application Filing
- 2016-07-12 CN CN201680041502.6A patent/CN107849767A/zh active Pending
- 2016-07-12 JP JP2017528288A patent/JPWO2017010084A1/ja active Pending
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2018
- 2018-09-05 HK HK18111362.7A patent/HK1252031A1/zh unknown
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS50126978A (ja) * | 1974-03-22 | 1975-10-06 | ||
JPS58143886U (ja) * | 1982-03-23 | 1983-09-28 | オリエンタル・アスベスト株式会社 | 金属繊維糸入りガラス不織布 |
JPH05279946A (ja) * | 1991-12-31 | 1993-10-26 | Kimberly Clark Corp | 導電性溶融吹込ウェブ製造方法、導電性積層体製造方法及びこれらの方法に従って作った導電性製品 |
JP2003105664A (ja) * | 2001-09-28 | 2003-04-09 | Unitika Ltd | 制電性長繊維不織布 |
US20040127132A1 (en) * | 2002-10-23 | 2004-07-01 | Bba Nonwovens Simpsonville, Inc. | Nonwoven protective fabrics with conductive fiber layer |
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JPWO2017010084A1 (ja) | 2018-04-26 |
CN107849767A (zh) | 2018-03-27 |
US20180200984A1 (en) | 2018-07-19 |
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