WO2016104492A1 - 防護服 - Google Patents
防護服 Download PDFInfo
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- WO2016104492A1 WO2016104492A1 PCT/JP2015/085809 JP2015085809W WO2016104492A1 WO 2016104492 A1 WO2016104492 A1 WO 2016104492A1 JP 2015085809 W JP2015085809 W JP 2015085809W WO 2016104492 A1 WO2016104492 A1 WO 2016104492A1
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- WIPO (PCT)
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- nonwoven fabric
- layer
- electret
- dust
- fiber layer
- Prior art date
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- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D31/00—Materials specially adapted for outerwear
- A41D31/04—Materials specially adapted for outerwear characterised by special function or use
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B17/00—Protective clothing affording protection against heat or harmful chemical agents or for use at high altitudes
- A62B17/006—Protective clothing affording protection against heat or harmful chemical agents or for use at high altitudes against contamination from chemicals, toxic or hostile environments; ABC suits
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B17/00—Protective clothing affording protection against heat or harmful chemical agents or for use at high altitudes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
- B01D39/1607—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous
- B01D39/1623—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous of synthetic origin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/28—Plant or installations without electricity supply, e.g. using electrets
- B03C3/30—Plant or installations without electricity supply, e.g. using electrets in which electrostatic charge is generated by passage of the gases, i.e. tribo-electricity
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
- B32B5/022—Non-woven fabric
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
- B32B5/08—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer the fibres or filaments of a layer being of different substances, e.g. conjugate fibres, mixture of different fibres
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
- B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
- B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
- D04H3/14—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic yarns or filaments produced by welding
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M17/00—Producing multi-layer textile fabrics
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M17/00—Producing multi-layer textile fabrics
- D06M17/04—Producing multi-layer textile fabrics by applying synthetic resins as adhesives
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M17/00—Producing multi-layer textile fabrics
- D06M17/04—Producing multi-layer textile fabrics by applying synthetic resins as adhesives
- D06M17/06—Polymers of vinyl compounds
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- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D2600/00—Uses of garments specially adapted for specific purposes
- A41D2600/20—Uses of garments specially adapted for specific purposes for working activities
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/20—All layers being fibrous or filamentary
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/02—Synthetic macromolecular fibres
- B32B2262/0253—Polyolefin fibres
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
- B32B2307/204—Di-electric
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/724—Permeability to gases, adsorption
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2437/00—Clothing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2571/00—Protective equipment
Definitions
- the present invention relates to a dustproof material that protects the human body from dust released into the environment, and protective clothing using the same.
- Chemical protective clothing is required to have a high level of dust resistance that prevents dust from entering the clothing and air permeability and moisture permeability that allow comfortable operation.
- Patent Documents 1 and 2 disclose an electret nonwoven sheet and a method for producing the same.
- the nonwoven fabrics described in Patent Documents 1 and 2 have high dust collection efficiency and high air permeability, but using only electret nonwoven fabrics is difficult from the viewpoint of strength and wear resistance. Furthermore, regarding the laminated structure, a solution by the lamination method is not disclosed. *
- the present invention discloses the following dustproof clothing.
- the dustproof material has a fiber layer and an electret nonwoven fabric layer, and the sum of the number of the fiber layer and the electret nonwoven fabric layer is 2 or more.
- the adjacent fiber layer and the electret non-woven fabric layer are bonded together in an area ratio of 5% or more and 10% or less.
- the said protective clothing whose said electret nonwoven fabric layer of dustproof material is a melt blown nonwoven fabric or a spun bond nonwoven fabric.
- a hindered amine-based additive and a triazine-based additive are essential, and a total of 0.5 to 5% by mass is contained.
- the adhesive for bonding the fiber layer of the dustproof material and the electret nonwoven fabric layer is a hot melt adhesive.
- the amount of the hot melt adhesive that bonds the fiber layer and the electret nonwoven fabric layer is 0.5 g / m 2 or more and 3.0 g / m 2 or less.
- Any of the above protective clothing having a thread sewing portion.
- FIG. 2a It is a conceptual diagram of the charge density measurement of an electret nonwoven fabric layer. Sectional drawing of the fiber layer after peeling an electret nonwoven fabric from a protective material. Sectional drawing of the fiber layer which removed all the fibers derived from the electret nonwoven fabric adhering to the fiber layer from the fiber layer of FIG. 2a Sectional drawing of the fiber layer which removed the fiber derived from the electret nonwoven fabric adhering to the fiber layer partially from the fiber layer of FIG. 2a. The figure which showed the part which cuts out the sample from dustproof material, in order to calculate the adhesion area of dustproof material.
- the electret nonwoven fabric layer used for the dustproof material of the present invention is a sheet made of a non-conductive fiber material, and can be obtained by a melt blow method or a spun bond method. That is, the electret nonwoven fabric layer is preferably a melt blown nonwoven fabric or a spunbond nonwoven fabric.
- melt blown nonwoven fabric is manufactured by the melt blow method.
- the melt-blowing method is generally a method in which a thermoplastic polymer extruded from a spinneret is finely divided into fibers by hot air jetting, and a web is formed using the self-bonding characteristics of the fibers.
- a complicated process is not required, and fine fibers of several tens ⁇ m to several ⁇ m or less can be easily obtained.
- Spinning conditions in the melt-blowing method include polymer discharge rate, nozzle temperature, air pressure, and the like. By optimizing these spinning conditions, a nonwoven fabric having a desired fiber diameter can be obtained.
- the spunbond method is the following method.
- the resin is melted and spun from the spinneret.
- the cooled and solidified yarn is pulled and stretched by compressed air injected from the ejector. It is collected on a moving net to form a fiber web.
- the fibrous web is heat bonded to form a nonwoven fabric. Since there is a step of melting and pulling the resin, there is a feature that it is easier to obtain fibers having higher strength than the melt blow method.
- nonwoven fabric material examples include synthetic fibers and natural fibers, but synthetic fibers are preferred.
- the volume resistivity is preferably 10 12 ⁇ ⁇ cm or more, more preferably 10 14 ⁇ ⁇ cm.
- examples thereof include polyolefins such as polyethylene and polypropylene, polyesters such as polyethylene terephthalate and polylactic acid, polycarbonates, polystyrenes, polyphenylene sulfites, fluororesins, and mixtures thereof.
- polyolefins such as polyethylene and polypropylene
- polyesters such as polyethylene terephthalate and polylactic acid
- polycarbonates such as polyethylene terephthalate and polylactic acid
- polycarbonates such as polyethylene terephthalate and polylactic acid
- polycarbonates such as polyethylene terephthalate and polylactic acid
- polycarbonates such as polyethylene terephthalate and polylactic acid
- polycarbonates such as polyethylene terephthalate and polylactic acid
- polycarbonates such as polyethylene terephthalate and polylactic acid
- polycarbonates such as polyethylene terephthalate and
- the meltblown nonwoven fabric preferably contains a hindered amine-based additive and / or a triazine-based additive. It is because it becomes possible to hold
- the content of the hindered amine additive and / or triazine additive is not particularly limited.
- the content thereof is preferably in the range of 0.5 to 5% by mass of the meltblown nonwoven fabric, respectively 0.7 mass % Or more and 3% by mass or less, respectively.
- the total content thereof is preferably in the range of 0.5 to 5% by mass of the meltblown nonwoven fabric, and the upper limit is set. More preferably, the content is 0.7% by mass or more and the lower limit is 3% by mass or less. If the amount added is small, it will be difficult to obtain the desired high level electret performance. On the other hand, when the amount is too large, the yarn-forming property and the film-forming property are deteriorated, and the cost is disadvantageous.
- hindered amine additives include poly [((6- (1,1,3,3, -tetramethylbutyl) imino-1,3,5-triazine-2,4-diyl. ) ((2,2,6,6, -tetramethyl-4-piperidyl) imino) hexamethylene ((2,2,6,6, -tetramethyl-4-piperidyl) imino)] (Ciba-Geigy, “Kimasoap (Registered trademark, the same shall apply hereinafter) 944LD), dimethyl-1- (2-hydroxyethyl) -4-hydroxy-2,2,6,6-tetramethylpiperidine polycondensate (manufactured by Chiba Geigy, “Tinuvin”) (Registered trademark, the same shall apply hereinafter) 622LD), 2- (3,5-di-t-butyl-4-hydroxybenzyl) -2-n-butylmalonate bis
- triazine-based additive examples include the poly [((6- (1,1,3,3, -tetramethylbutyl) imino-1,3,5-triazine-2,4-diyl) ((2 , 2,6,6, -tetramethyl-4-piperidyl) imino) hexamethylene ((2,2,6,6, -tetramethyl-4-piperidyl) imino)] (manufactured by Ciba Geigy, “Kimasoap” 944LD), Examples include 2- (4,6-diphenyl-1,3,5-triazin-2-yl) -5-((hexyl) oxy) -phenol (manufactured by Ciba Geigy, “Tinuvin” 1577FF). Among these, it is particularly preferable to use a hindered amine additive.
- the charge density of the electret nonwoven fabric layer is preferably 1 ⁇ 10 ⁇ 10 coulomb / cm 2 or more, more preferably 1 ⁇ 10 ⁇ 9 coulomb / cm 2 or more, and further preferably 1 ⁇ 10 ⁇ 8 coulomb / cm 2 or more.
- the electret non-woven fabric layer may contain, in addition to the above-mentioned additives, known additives generally used for non-conductive fiber sheets of electret processed products, such as heat stabilizers, weathering agents, and polymerization inhibitors.
- a non-conductive fiber sheet is run.
- a slit-like suction nozzle is brought into contact with the sheet so as to cross the entire width of the sheet.
- the surface of the sheet opposite to the contact portion is brought into contact with the water surface or immersed.
- water is sucked from the suction nozzle.
- the water on the opposite side of the part where the suction nozzle is in contact with the sheet moves so as to penetrate the sheet in the thickness direction, so that the water penetrates throughout the thickness direction in the sheet. be able to.
- the suction nozzle is arranged so as to cross the sheet width direction and the sheet is sucked while running, the state in which water has permeated the entire sheet thickness direction can be spread evenly over the entire sheet. Therefore, when this sheet is dried, it becomes an electret nonwoven fabric in which the charge is uniformly and densely charged on the entire surface of the sheet.
- a method using DC corona discharge to a non-woven sheet may be used.
- it is the following method.
- a plurality of DC corona discharge electrodes are provided, and the sheet is electretized by increasing the electric field strength caused by the DC corona discharge electrode acting later than the electric field strength caused by the DC corona discharge electrode acting first.
- the air permeability of the electret non-woven fabric layer is preferably 40 cm 3 / cm 2 / s or more, more preferably 80 cm 3 / cm 2 / s or more, and still more preferably 100 cm 3 / cm 2 / s or more. It becomes easy to maintain the air permeability. Breathability can be achieved by basis weight, average fiber diameter, thickness, and the like.
- the fiber layer of the present invention is a layer containing fibers that is not an electret non-woven fabric according to the category defined in the present invention.
- the material has sufficient strength, wear resistance, texture such as touch, softness, and high air permeability.
- the fiber structure of the fabric used as the fiber layer include woven fabric, knitted fabric, non-woven fabric, and paper.
- a nonwoven fabric is preferable from a viewpoint of cost and a physical property.
- Nonwoven fabrics include wet nonwoven fabrics, resin bond dry nonwoven fabrics, thermal bond dry nonwoven fabrics, spunbond dry nonwoven fabrics, needle punch dry nonwoven fabrics, water jet punch dry nonwoven fabrics, melt blown dry nonwoven fabrics or flash spinning dry nonwoven fabrics. it can.
- a paper making method that facilitates uniform basis weight and thickness can also be preferably used.
- a spunbonded nonwoven fabric is preferable from the viewpoints of cost and physical properties.
- Examples of the material of the fiber layer include polyolefins such as polyethylene and polypropylene; polyesters such as polyethylene terephthalate and polylactic acid; polycarbonates; polystyrenes, polyphenylene sulfites; fluororesins; and mixtures thereof.
- polyolefins such as polyethylene and polypropylene
- polyesters such as polyethylene terephthalate and polylactic acid
- polycarbonates such as polyethylene terephthalate and polylactic acid
- polycarbonates polystyrenes, polyphenylene sulfites; fluororesins; and mixtures thereof.
- those mainly composed of polyolefin or polylactic acid are preferable from the viewpoint of electret performance.
- polyolefin what mainly has a polypropylene is more preferable, and it is preferable from a viewpoint of the workability at the time of bonding that it is the same material as the above-mentioned electret nonwoven fabric layer.
- the tensile strength of the fiber layer is preferably 5 N / 50 mm or more. More preferably, it is 10 N / 50 mm or more, More preferably, it is 15 N / 50 mm or more.
- the tensile strength is 200 N / 50 mm or more, it is necessary to remarkably increase the strength of the constituent fibers or increase the basis weight, so that softness as a dustproof material cannot be obtained. Therefore, the tensile strength of the fiber layer is preferably less than 200 N / 50 mm.
- the abrasion resistance is preferably grade 3 or higher in the Taber method described in JIS L 1913: 2010 (6.6.1). More preferably, it is quaternary or higher.
- the bending resistance is preferably 150 mm or less in the a) 41.5 ° cantilever method of JIS L 1913: 2010 (6.7.1). More preferably, it is 130 mm or less. More preferably, it is 100 mm or less. If it exceeds 150 mm, the fabric has a high rigidity, which causes stiffness when used as protective clothing.
- the air permeability is preferably 40 cm 3 / cm 2 / s or more. More preferably, it is 80 cm ⁇ 3 > / cm ⁇ 2 > / s or more, More preferably, it is 100 cm ⁇ 3 > / cm ⁇ 2 > / s or more.
- the air permeability is 40 cm 3 / cm 2 / s or more, it becomes easy to maintain the air permeability when a dustproof material is used. Breathability can be achieved by basis weight, average fiber diameter, thickness, and the like.
- the thickness of a preferable fiber layer is 0.01 mm or more, More preferably, it is 0.1 mm or more.
- the preferred fiber layer thickness is 5 mm or less, more preferably 1 mm or less.
- the basis weight is preferably 10 g / m 2 or more, more preferably 20 g / m 2 or more.
- the weight per unit area is preferably 200 g / m 2 or less, and more preferably 100 g / m 2 or less.
- the fiber layer used in the present invention has a functional processing such as antistatic processing on the surface.
- the antistatic processing is preferably a method of processing a conductive polymer on the surface or a method of processing a hygroscopic polymer on the surface. At this time, it is preferable to process the opposite surface in contact with the electret nonwoven fabric layer to be laminated.
- the method for producing the dustproof material of the present invention will be described.
- the manufacturing method of the dustproof material in this invention consists of the manufacturing process of each component material, and the lamination
- each constituent material for example, a known method can be used.
- the manufacturing method of a fiber layer and an electret nonwoven fabric layer is as having demonstrated above.
- the sum of the number of fiber layers and electret nonwoven layers is 2 or more.
- the fiber layer ensures strength and wear resistance for use as a dustproof material.
- the electret non-woven fabric layer has moisture permeability for the role of preventing dust from entering the clothes and the wearer's comfort. For this reason, the dustproof material preferably has a collection efficiency defined below of 65% or more.
- the collection efficiency in this invention says the value calculated
- a dust storage box is connected to an upstream side of a sample holder for setting a measurement sample, and a flow meter, a flow rate adjusting valve, and a blower are connected to a downstream side.
- the particle counter can be used for the sample holder, and the number of dusts on the upstream side and the number of dusts on the downstream side of the measurement sample can be measured via the switching cock.
- the sample holder includes a pressure gauge, and can read the static pressure difference between the upstream and downstream of the sample.
- a 0.3 ⁇ m diameter polystyrene standard latex powder (Nacalai Tesque 0.309 U polystyrene 10 mass% solution diluted 200-fold with distilled water) is filled into a dust storage box, and the sample is placed in a holder. set. Adjust the air volume with a flow adjustment valve so that the filter passing speed is 3 m / min, and set the dust concentration to the range of 10,000 to 40,000 pieces / 2.83 ⁇ 10 ⁇ 4 m 3 (0.01 ft 3 ).
- the air permeability of the dustproof material used in the present invention is preferably 30 cm 3 / cm 2 / s or more so that the wearer of the protective clothing can work comfortably in summer. More preferably, it is 35 cm ⁇ 3 > / cm ⁇ 2 > / s or more.
- the upper limit of the air permeability of the dustproof material is not limited as long as the collection efficiency is 50% or more.
- the dustproof material of the present invention has a laminated structure of a fiber layer and an electret nonwoven layer, and the sum of the numbers of the fiber layer and the electret nonwoven layer is 2 or more.
- the laminated structure include the following. A structure having a fiber layer on the outer surface of the garment and an electret non-woven fabric layer on the inner surface of the garment. A three-layer structure in which the fiber layer, the electret nonwoven layer and the fiber layer are in this order and the electret nonwoven layer is sandwiched between them. A five-layer structure in which two layers of a highly abrasion-resistant fiber layer and a high-strength fiber layer are overlapped, and the two laminated fiber laminates sandwich the electret nonwoven fabric layer.
- a four-layer structure in which two electret non-woven fabric layers having different characteristics and a fiber layer are stacked on the fiber layer can be mentioned.
- a three-layer structure in which two fiber layers sandwich an electret nonwoven fabric layer is preferable.
- a fiber layer having strength and a fiber layer having wear resistance can be used.
- the electret non-woven fabric alone has a problem in workability at the time of wearing, sewing, and the like because dust and dust easily adhere to the surface.
- ultrasonic bonding or pattern height is used as a method of adhering the fiber layer and the electret non-woven fabric layer.
- the bonding process by an adhesive agent is preferable.
- a blade called ultrasonic vibration is sandwiched between an ultrasonic vibration blade, an adhesive material, and an embossing roll having a specific pattern at a pressure of 0.01 MPa to 1 MPa.
- An example is a method of oscillating and melt-bonding a pattern portion in contact with a blade.
- the blade is mainly made of titanium, which is resistant to friction, but aluminum, stainless steel alloy, etc. can also be used.
- a blade having a width of 10 to 50 cm is used.
- a heat embossing roll with a depth of 1 mm or more is used for the embossing pattern.
- the pattern height refers to the distance between the upper part and the lower part of the edge constituting the embossed pattern of the hot embossing roll.
- the temperature of hot embossing is preferably 60 ° C. or higher, more preferably 70 ° C. or higher, and still more preferably 100 ° C. or higher.
- the temperature of hot embossing is preferably 170 ° C. or lower, more preferably 150 ° C. or lower, and still more preferably 135 ° C. or lower.
- the pressing force of the hot embossing roll and the nip roll that sandwiches the hot embossing roll is preferably 0.5 MPa or more, more preferably 1 MPa or more.
- the pressing pressure of the nip roll is preferably 10 MPa or less, more preferably 5 MPa or less.
- the adhesive used for the bonding process using an adhesive is not particularly limited, and examples thereof include a hot melt adhesive, a powder adhesive, and a solution adhesive. Of these, hot melt adhesives are preferable from the viewpoint of cost and ability to uniformly apply to an object. Examples of the hot melt adhesive include a synthetic rubber adhesive, an olefin adhesive, and an EVA (ethylene vinyl acetate) adhesive. Synthetic rubber-based or olefin-based adhesives are preferable from the viewpoint of excellent adhesive strength and excellent compatibility with the fiber layer and the electret nonwoven fabric layer. When a hot melt adhesive is used as the adhesive, the upper limit of the melt viscosity at 140 ° C.
- the hot melt adhesive is 20000 mPa ⁇ s because the hot melt adhesive can be more uniformly extruded than a T-die. Or less, more preferably 10,000 mPa ⁇ s or less, and even more preferably 5000 mPa ⁇ s or less.
- the lower limit of the melt viscosity is preferably 300 mPa ⁇ s or more, and more preferably 500 mPa ⁇ s or more.
- the threading resistance of the sewing needle will increase, and the sewing needle will break, become dirty, the stitches will be spattered due to the fusing of the needle, the thread will break, the thread will break, Is likely to occur. Further, when the adhesive is clogged in the needle hole or the needle groove, the stitches or the sewing thread tend to be easily cut.
- the softening point of the hot melt adhesive is preferably 105 ° C. or lower, more preferably 90 ° C. or lower.
- the softening point is preferably 70 ° C. or higher from the viewpoint of stability and storage of the adhesive. Within this range, breakage and dirt on the sewing needle, skipping due to fusion caused by heat generation of the needle, breakage of the sewing thread, breakage of the ground thread, and sewing wrinkles are unlikely to occur.
- the softening point can be adjusted by changing the composition of the thermoplastic elastomer, tackifier, mineral oil, and heat stabilizer in the adhesive.
- the puncture strength at the sewing needle is preferably 1.0 N or less, more preferably 0.9 N or less, and even more preferably 0.8 N or less.
- the lower limit is preferably 0.3 N or more from the viewpoint of preventing skipping.
- the puncture strength at the sewing needle can be achieved by using an adhesive material in the softening point range described above or adjusting the amount of adhesive applied.
- the method of laminating the fiber layer and the electret nonwoven fabric layer with hot melt adhesive is a method of applying an adhesive from a dot-pattern roll to a substrate, applying a powdered adhesive to the base, and then heating.
- Examples thereof include a method of bonding, a method of applying a molten adhesive in a spray form, and the like.
- a method of applying the hot melt adhesive in a spray form from a T-die type extruder is preferable. With this method, it is possible to bond the fiber layer and the electret nonwoven layer without significantly impairing the texture of the dustproof material and the breathability of the dustproof material, and the adhesive strength between the fiber layer and the electret nonwoven layer with a low coating amount.
- the hot melt adhesive can be more uniformly applied.
- the hot melt is extruded from the T die from the viewpoint of more uniformly extruding the hot melt adhesive than the T die.
- the temperature of the adhesive is preferably 100 ° C. or higher, and more preferably 130 ° C. or higher.
- the temperature of the hot melt adhesive when extruded from the T die is preferably 180 ° C. or lower, and is 160 ° C. or lower. Is more preferable.
- after spraying the hot melt adhesive it is preferable to maintain the electret performance at the contact position between the fiber layer and the hot melt adhesive, lower than the melting point of the fiber layer and the base material of the electret nonwoven fabric.
- the amount of hot melt adhesive between the fiber layer and the electret layer is preferably 3 g / m 2 or less from the viewpoint of maintaining the air permeability of the dustproof material and ease of needle sewing. More preferably, it is 2.5 g / m 2 or less, and still more preferably 2 g / m 2 or less.
- the amount of the hot melt adhesive is preferably 0.5 g / m 2 or more from the viewpoint of maintaining the adhesive strength and applying the hot melt adhesive uniformly.
- the adjacent fiber layer and the electret nonwoven fabric layer are bonded with an area ratio of 5% or more and 10% or less.
- the bonded area ratio can be defined by the measurement method of the bonded area of the dustproof material described in the examples.
- the dustproof material of the present invention is composed of an adjacent fiber layer and an electret nonwoven layer. It is preferable to make the adhesion state of the adhesion region between the formed layers more uniform. For example, even when the sample size in the measurement method of the adhesion area of the dustproof material described in the examples is changed from 20 mm square to 10 mm square, the adhesion area ratio between the layers obtained by the measurement method is 5% or more and 10% or less.
- the adhesion area of the dustproof material obtained by the measurement method is 5 It is more preferable that it is 10% or less.
- the following methods can be mentioned as means for making the size and arrangement of the adhesion sites between the layers formed by the adjacent fiber layer and electret non-woven fabric layer more uniform.
- the shape of the nozzle for spraying the adhesive may be applied in an appropriate shape and an appropriate amount of adhesive.
- curtain spray is preferable because a hot melt adhesive can be uniformly applied to a dustproof material.
- the dust-proof material excellent in both the dust-proof material tensile strength and air permeability by adhere
- the adhesion area ratio needs to be 5% or more, but preferably 7% or more. If the ratio of the adhesion area is too low, the tensile strength of the dust-proof material is lowered, and when the dust-proof material is used as a chemical protective suit, the durability of the chemical protective suit tends to be lowered. On the other hand, the adhesion area ratio needs to be 10% or less, but is preferably 8% or less.
- the bonding area can be obtained using a Keyence digital microscope (VHX2000).
- ultrasonic bonding is a preferred method because neither the fiber layer nor the electret nonwoven layer is heated except for the blade and the pattern portion.
- the adhesive is preferably a hot melt adhesive. That is, the method of laminating at least one layer formed by the fiber layer and the electret nonwoven fabric layer of the dustproof material of the present invention is preferably a method using a hot-melt adhesive, so that the adjacent fiber layer Since the entire region between the layers formed by the electret non-woven fabric layer is more uniformly bonded, the dust-proof material becomes soft, and when the dust-proof material is used as a chemical protective suit, the wearability is further improved. Therefore, it is more preferable.
- the tensile strength in any direction of the laminated dustproof material is 30 N / 5 cm or more, it will be more likely to break during sewing when the dustproof material is used as a chemical protective suit or when the chemical protective suit is worn. Since it is suppressed, it is preferable, more preferably 35 N / 5 cm or more, and still more preferably 40 N / 5 cm or more.
- the tear strength in any direction of the laminated dustproof material is preferably 10N or more because tearing during wearing of the chemical protective clothing using the dustproof material is further suppressed, and more preferably 25N or more. It is.
- the fabric obtained by laminating has high strength, excellent wear resistance, can suppress particle entry, has air permeability, and can be suitably used as a dustproof material suitable for thread sewing.
- the dustproof material of the present invention can be suitably used as a protective garment by sewing into a coverall, kappa, gown or the like.
- a coverall-type protective suit is preferred in order to prevent ingress of dust such as incinerated ash containing radioactive substances, asbestos and dioxins.
- the sewing method from the dustproof material to the protective clothing includes a thread sewing method using a thread and a needle and a non-sewing method such as ultrasonic sewing without using a thread and a needle.
- sewing with a thread sewing machine is preferable because of high workability.
- an existing sewing machine such as a lock stitch machine or a lock sewing machine can be used according to the sewing site.
- Lock stitch is a method that allows lower thread to pass through the loop of the upper thread, and is preferable because it is difficult to unravel and is excellent in strength, and the lock sewing machine is preferable because it is a seam that weaves together, does not have strong thread tightening, and can respond to expansion and contraction of the fabric. .
- the thickness of the sewing needle is selected according to the composition of the fabric. Generally, the needle count is 9 (for needles 0.67 mm) for thin fabric, and the needle count is 16 for needles (thickness). Diameter of 1.02 mm) is used. If a thin fabric is sewed with a thick needle, it may tear from the stitch when the fabric thread breaks or excessive force is applied. In addition, when a thick fabric is sewn with a thin needle, the needle may be bent or broken. In the case of protective clothing, 11th to 16th is preferable. As the sewing thread, a commercially available thread such as a spun thread, a wooly thread, or a high-winding contracted wooly thread can be used. Sewing thread counts from 30 to 90 can be used.
- the yarn material natural fibers such as silk yarn and cotton yarn and synthetic fibers such as polyester and nylon made from petroleum can be used.
- polyester is preferably used from the viewpoint of weather resistance.
- the number of stitches is suitably 5 stitches / 3 cm to 10 stitches / 3 cm in accordance with the required stitch strength.
- the collection efficiency of the sewing part is preferably 50% or more. By setting the collection efficiency of the sewing part to 50% or more, it is possible to prevent external air from flowing in from the stitches and harmful substances such as radioactive substances from flowing into the protective clothing.
- the stitch collection efficiency of 50% or more can be achieved by closing the stitches with seam tape or by reducing the thickness of the sewing needle.
- Mass per unit area (weight per unit: g / m 2 ) It measured based on JIS L 1913: 2010 6.2. Three or more test pieces having a size of 25 cm ⁇ 25 cm were sampled from a sample using a punching shape or a template and a razor blade, and the weight was measured to obtain an average value. This was defined as mass (g / m 2 ) per unit area.
- the particle counter can be used for the sample holder, and the number of dusts on the upstream side and the number of dusts on the downstream side of the measurement sample can be measured via the switching cock.
- the sample holder includes a pressure gauge, and can read the static pressure difference between the upstream and downstream of the sample.
- a 0.3 ⁇ m diameter polystyrene standard latex powder (Nacalai Tech 0.309 U polystyrene 10 mass% solution diluted 200-fold with distilled water) is filled in a dust storage box, and the sample is placed in a holder.
- Set and adjust the air volume with a flow adjustment valve so that the filter passing speed is 3 m / min, and the dust concentration is in the range of 10,000 to 40,000 pieces / 2.83 ⁇ 10 ⁇ 4 m 3 (0.01 ft 3 ).
- a particle counter (Rion, KC-01E). The average value of 10 samples was calculated.
- Tensile strength (spunbond nonwoven fabric and dustproof material) Measured based on JIS L 1913: 2010 6.3.1. A tensile test is performed on a sample with a size of 5 cm ⁇ 30 cm with a constant-speed extension type tensile tester for three samples in both the longitudinal and lateral directions under the conditions of a gripping interval of 20 cm and a tensile speed of 10 cm / min, and the sample breaks. The maximum strength when pulled to the maximum was taken as the tensile strength, and the average value in each of the vertical and horizontal directions of the sample was calculated.
- the vertical direction refers to a direction parallel to the length direction of the sample roll
- the horizontal direction refers to a direction perpendicular to the roll length direction of the sample.
- the vertical direction refers to a direction parallel to the length direction of the sample roll
- the horizontal direction refers to a direction perpendicular to the roll length direction of the sample.
- Thickness Measured based on JIS L1913: 2010 6.1.1 A method. Ten test pieces having a size of 2500 mm 2 or more were collected from the sample, and a pressure of 0.5 kPa was applied to the upper circular horizontal plate of the thickness measuring device to adjust the zero point. Thereafter, the thickness was measured to 0.01 mm by applying a pressure of 0.5 kpa to the test piece for 10 seconds in a standard state using a thickness measuring instrument. The average value of 10 test pieces was obtained.
- Adhesive area ratio Refer to FIG. A rectangular dustproof material 11 having a long side of 240 mm and a short side of 180 mm was prepared.
- the dust-proof material 11 was divided into 60 mm squares by dividing the long side into four equal parts, the short side into three equal parts, and 12 small dust-proof materials 12 were obtained.
- the center point is the same as that of the small dustproof material 12
- two sides are parallel to the long side of the dustproof material 11
- the remaining two sides are short sides of the dustproof material 11.
- Parallel 20 mm square samples were cut out to obtain a total of 12 samples A to L. Samples A to L here correspond to samples 13 to 24 shown in FIG.
- the fiber layer was peeled off from each of the above samples to obtain 12 peeled fiber layers A to L.
- the adhesive and the fiber derived from the electret nonwoven fabric layer were adhered to the surface of the 12 peeled fiber layers bonded to the electret nonwoven fabric layer.
- the fibers derived from the electret non-woven fabric attached to the fiber layer include fibers attached to the fiber layer by an adhesive (hereinafter referred to as fiber 9) and fibers attached to the fiber layer without contact with the adhesive ( Hereinafter, there were two types of fibers 10).
- fiber 9 an adhesive
- the remaining six peeled fiber layers G to L are bonded to the electret non-woven fabric layer of the peeled fiber layers. Then, the fiber 10 was removed by rubbing with # 320 sandpaper. These were taken as non-woven fabric part-removed fiber layer samples G to L after peeling.
- FIG. 2a shows a conceptual diagram of any cross section of the fiber layers A to L after peeling.
- Adhesive 8 and fibers derived from the electret nonwoven fabric layer are adhered to the surface 7 of the fiber layer 6 after being peeled and adhered to the electret nonwoven fabric layer.
- the fibers derived from the electret non-woven fabric layer include fiber 9 and fiber 10.
- Fig. 2b shows the non-woven fabric fiber removal fiber layer 6A after peeling.
- This is the form of the post-peeling / non-woven fabric fiber-removed fiber layer samples A to F described above. Only the adhesive 8 is adhered to the non-woven fabric fiber removal fiber layer 6A after peeling. Therefore, on the surface of the fiber layer samples A to F that are bonded to the electret nonwoven fabric layer, there are fiber portions (portions where no adhesive is attached) and non-fiber portions (portions where the adhesive is attached). Exists.
- Fig. 2c shows a fiber layer sample 6B after peeling and non-woven fabric part removal. This corresponds to the fiber layer samples G to L after peeling and non-woven fabric part removal described above.
- the adhesive 8 and the fibers 9 are adhered.
- each of the surfaces adhered to the obtained fiber layer samples A to F and GL of the electret nonwoven fabric layer after peeling was used with a magnification of 150 times and a threshold of ⁇ 60. With this setting, images were taken so that the fiber layer samples after each peeling were in the entire field of view. Next, the image of the obtained sample was divided into four parts at the center of the long side and the short side. Furthermore, using the method of calculating the area of the fiber part by the difference in brightness in the upper left part of the image divided into four, the area of the fiber part on the surface of the surface that was bonded to the electret nonwoven layer of the fiber layer sample after each peeling Calculated.
- the areas of the fiber portions on the surfaces of the fiber layer samples A to L after peeling are S1 to S12, respectively, and then a calculation formula of (S7-S1) / S7 ⁇ 100, (S8-S2) / S8 ⁇ 100 (S9-S3) / S9 ⁇ 100, (S10-S4) / S10 ⁇ 100, (S11-S5) / S11 ⁇ 100, and (S12-S6)
- the value obtained by the calculation formula of / S12 ⁇ 100 was defined as the bonding area, and six bonding areas were calculated.
- the alphabets of the sample, the fiber layer after peeling, and the fiber layer sample correspond to each other.
- the fiber layer A after peeling and the fiber layer sample A are derived from the fiber layer A.
- the same measurement as the above was performed at each interface, and the adhesion area was calculated.
- Comfort evaluation In a constant temperature and humidity chamber set at 20 ° C. and 50% Rh, the subject had one T-shirt (“AIRism” (registered trademark, manufactured by UNIQLO)), upper and lower work clothes (10% cotton, polyester 90 %), Wearing protective clothing, wearing protective gear (rubber gloves, helmet, boots) and fixing with tape.
- the test subject puts "Ondoritori” (registered trademark, TR-71nw made by T & D) from the top of the shirt near the center of the back, and after entering the room, stepped on (14 steps / 10 seconds) Humidity was measured every 10 seconds.
- a fan YUSASA YT-4001K (WH) was blown from a position 50 cm away from the back with an air volume of “medium”.
- a sample or 55 mm diameter test piece was collected from the thigh part of the protective clothing and 2 pieces from the thigh part of the protective clothing.
- a total of 4 dustproof materials were collected, the needle penetration rate was set to 100 mm / min, and the constant speed extension type.
- a piercing test was performed with a tensile tester, and an average value of four test pieces was obtained.
- Thread sewing test Two dustproof materials were stacked and sewing was continued for 30 m. Sewing is performed using a one-needle, main-stitch sewing machine under the conditions of 11th needle, 90th polyester thread, 10/3 stitches, G, stitch skipping, sewing wrinkles, sewing needle The broken and broken yarn was designated P.
- ⁇ Electret nonwoven fabric 1 Melt blown nonwoven fabric made of polypropylene (containing 1% by weight of hindered amine additive, with electret processing, charge density 8.5 ⁇ 10 ⁇ 9 coulomb / cm 2 , air permeability 44 cm 3 / cm 2 / s, basis weight 20 g / m 2 , average fiber Diameter 2 ⁇ m).
- ⁇ Electret non-woven fabric 2 Melt blown nonwoven fabric made of polypropylene (containing 1% by weight of hindered amine additive, with electret processing, charge density 8.5 ⁇ 10 ⁇ 9 coulomb / cm 2 , air permeability 95 cm 3 / cm 2 / s, basis weight 18 g / m 2 , average fiber Diameter 4 ⁇ m).
- Hot melt adhesive A “Morescomelt” TN-367Z (manufactured by Moresco), melt viscosity of 1200 mPa ⁇ s at 140 ° C., softening point of 82 ° C.
- B Hot melt adhesive B “Molescomelt” TN-255Z (manufactured by Moresco), melt viscosity of 14250 mPa ⁇ s at 140 ° C., softening point of 102 ° C.
- C Hot melt adhesive C “Morescomelt” AC-831Z (manufactured by Moresco), melt viscosity at 160 ° C. 4000 mPa ⁇ s, softening point 122 ° C.
- Example 1 The hot melt adhesive A heated at 150 ° C. and melted by a hot melt adhesive machine is applied to the first surface of the electret nonwoven fabric 1 in a spray form from the T die so that the application amount is 2 g / m 2. Thereafter, the spunbond fabric 1 was bonded to the first surface of the electret nonwoven fabric 1. The resulting two-layer laminate of spunbond fabric 1 / electret nonwoven fabric 1 was wound up. The hot melt adhesive A is applied to the second surface of the electret non-woven fabric 1 in the form of a spray again in the same manner as in the previous step so that the coating amount is 2 g / m 2. 1 was bonded to the second surface of the electret nonwoven fabric 1.
- a dustproof material 1 having a structure in the order of spunbond fabric 1 / electret nonwoven fabric 1 / spunbond fabric 1 was obtained.
- the composition of the obtained dustproof material 1 is shown in Table 3, and the measurement results of the characteristics are shown in Tables 4-6.
- the dustproof material 1 has a basis weight of 60 g / m 2 , a fabric portion collection efficiency of 92%, a sewing portion collection efficiency of 89%, a breathability of 42 cm 3 / cm 2 / s, and the maximum ratio of the adhesion area in the observed six regions. The value was 9% and the minimum value was 7%.
- the tensile strength was 103.3 N / 50 mm in the vertical direction, 50.3 N / 50 mm in the horizontal direction, and the tear strength was 15.4 N in the vertical direction and 30.2 N in the horizontal direction.
- the sewn portion of the cutout dustproof material is made with a high-winding reduced Woolley thread, a single-needle three-thread over-sewing machine, and a stitch number of 8 stitches. Sewed at 3 cm. Fastening was performed with spun yarn # 60 polyester, main sewing, and sewing was performed with a stitch number of 6 stitches / 3 cm. When a coverall type chemical protective suit was produced by these methods, the cloth was not torn or torn at the time of sewing, and the sewing property was good. Further, when the wearability was evaluated in an atmosphere of 35 ° C.
- the temperature difference from Comparative Example 1 was ⁇ 3.5 ° C.
- the wearability was evaluated as A
- the wear test was evaluated as A. It was.
- the humidity was 21% Rh lower than that of Comparative Example 1, and the evaluation was A.
- Example 2 Spunbond fabric 1 / electret nonwoven fabric 1 / spunbond fabric 1 in the same order as in Example 1 except that the amount of hot melt adhesive applied to the first surface of the electret nonwoven fabric 1 was 1 g / m 2.
- the dust-proof material 2 has a basis weight of 58 g / m 2 , a fabric portion collection efficiency of 91%, a sewing portion collection efficiency of 89%, a breathability of 44 cm 3 / cm 2 / s, and the maximum ratio of the adhesion area of the six regions observed.
- the value was 6% and the minimum value was 5%.
- the tensile strength was 98.5 N / 50 mm in the vertical direction, 45.9 N / 50 mm in the horizontal direction, and the tear strength was 13.0 N in the vertical direction and 28.8 N in the horizontal direction.
- Example 3 Spunbond fabric 1 / electret nonwoven fabric 1 / spunbond fabric 1 dustproof material 3 in the same manner as in Example 1 except that the amount of hot melt adhesive applied to the first surface of the electret nonwoven fabric 1 was 4 g / m 2.
- the composition of the obtained dustproof material 3 is shown in Table 3, and the measurement results of the characteristics are shown in Tables 4-6.
- the dust-proof material 3 has a basis weight of 64 g / m 2 , a fabric portion collection efficiency of 93%, a sewing portion collection efficiency of 89%, a breathability of 38 cm 3 / cm 2 / s, and the maximum ratio of the adhesion area of the six regions observed. The value was 10% and the minimum value was 8%.
- the tensile strength was 106.8 N / 50 mm in the vertical direction, 54.4 N / 50 mm in the horizontal direction, and the tear strength was 17.2 N in the vertical direction and 32.5 N in the horizontal direction.
- Example 4 Spunbond fabric 1 / electret nonwoven fabric 1 / spunbond fabric 1 are formed in the same manner as in Example 1 except that the hot melt adhesive A is changed to the hot melt adhesive B and the coating amount is 1 g / m 2.
- a dustproof material 4 was obtained.
- the composition of the obtained dustproof material 4 is shown in Table 3, and the measurement results of the characteristics are shown in Tables 4-6.
- the dustproof material 4 has a basis weight of 58 g / m 2 , a fabric portion collection efficiency of 92%, a sewing portion collection efficiency of 88%, a breathability of 46 cm 3 / cm 2 / s, and the maximum ratio of the adhesion area of the six regions observed. The value was 9% and the minimum value was 6%.
- the tensile strength was 103.0 N / 50 mm in the vertical direction, 51.1 N / 50 mm in the horizontal direction, and the tear strength was 15.7 N in the vertical direction and 30.6 N in the horizontal direction.
- a coverall type chemical protective suit of the same size was produced in the same process as in Example 1. As a result, there was no dust adhering to the fabric at the time of sewing, and the sewing performance was good. Further, when the wearability was evaluated in an atmosphere of 35 ° C. and 50% Rh, the temperature difference from Comparative Example 1 was ⁇ 3.5 ° C., the wearability was evaluated as A, and the wear test was evaluated as A. It was. As for the comfort evaluation, the humidity was 22% Rh lower than that of Comparative Example 1, and the evaluation was A.
- Example 5 A dustproof material 5 of spunbond fabric 1 / electret nonwoven fabric 2 / spunbond fabric 1 was obtained in the same manner as in Example 2 except that the electret nonwoven fabric 1 was changed to the electret nonwoven fabric 2.
- the composition of the obtained dustproof material 5 is shown in Table 3, and the measurement results of the characteristics are shown in Tables 4-6.
- the dust-proof material 5 has a basis weight of 56 g / m 2 , a fabric portion collection efficiency of 55%, a sewing portion collection efficiency of 50%, a breathability of 60 cm 3 / cm 2 / s, and the maximum ratio of the adhesion area of the six regions observed. The value was 9% and the minimum value was 6%.
- the tensile strength was 104.0 N / 50 mm in the vertical direction, 52.0 N / 50 mm in the horizontal direction, and the tear strength was 15.9 N in the vertical direction and 31.1 N in the horizontal direction.
- Example 6 Spunbond fabric 1 / electret nonwoven fabric 1 / spunbond fabric 1 in the same order as in Example 1 except that hot melt adhesive A was changed to hot melt adhesive C and the coating amount was 1 g / m 2.
- the obtained dustproof material 6 was obtained.
- the composition of the obtained dustproof material 6 is shown in Table 3, and the measurement results of the characteristics are shown in Tables 4-6.
- the dustproof material 6 has a basis weight of 58 g / m 2 , a fabric portion collection efficiency of 90%, a sewing portion collection efficiency of 87%, a breathability of 47 cm 3 / cm 2 / s, and the maximum ratio of the adhesion area of the six regions observed. The value was 9% and the minimum value was 6%.
- the tensile strength was 129.8 N / 50 mm in the vertical direction, 50.5 N / 50 mm in the horizontal direction, and the tear strength was 15.1 N in the vertical direction and 29.9 N in the horizontal direction.
- the same coverall-type chemical protective clothing as in Example 1 was produced, and it had good sewing properties without dust adhering to the fabric during sewing. However, skipping occurred during the thread sewing test.
- the puncture strength with the sewing needle was 1.03N.
- the wearability was evaluated in an atmosphere of 35 ° C. and 50% Rh, the temperature difference from Comparative Example 1 was ⁇ 3.5 ° C., the wearability was evaluated as A, and the wear test was evaluated as A. It was.
- the humidity was 23% Rh lower than that of Comparative Example 1, and the evaluation was A.
- Example 7 Except that the electret nonwoven fabric 1 was changed to the electret nonwoven fabric 3, a dustproof material 7 constituted in the order of spunbond fabric 1 / electret nonwoven fabric 3 / spunbond fabric 1 was obtained in the same manner as in Example 2.
- the structure of the obtained dustproof material 7 is shown in Table 3, and the measurement results of the characteristics are shown in Tables 4-6.
- the dust-proof material 7 has a basis weight of 54 g / m 2 , a fabric portion collection efficiency of 40%, a sewing portion collection efficiency of 35%, a breathability of 90 cm 3 / cm 2 / s, and the maximum ratio of the adhesion area of the six regions observed. The value was 9% and the minimum value was 7%.
- the tensile strength was 105.2 N / 50 mm in the vertical direction, 52.2 N / 50 mm in the horizontal direction, and the tear strength was 15.9 N in the vertical direction and 30.5 N in the horizontal direction.
- the same coverall-type chemical protective clothing as in Example 1 was produced, and it had good sewing properties without dust adhering to the fabric during sewing. Further, when the wearability was evaluated in an atmosphere of 35 ° C. and 50% Rh, the temperature difference from Comparative Example 1 was ⁇ 3.8 ° C., the wearability was evaluated as A, and the wear test was evaluated as A. It was. As for the comfort evaluation, the humidity was 27% Rh lower than that of Comparative Example 1, and the evaluation was A.
- the dustproof material 8 had a basis weight of 40 g / m 2 , a fabric portion collection efficiency of 80%, a sewing portion collection efficiency of 80%, and a breathability of 0.1 cm 3 / cm 2 / s. Tensile strength was 89.8 N / 50 mm in the vertical direction, 68.0 N / 50 mm in the horizontal direction, and tear strength was 22.4 N in the vertical direction and 16.1 N in the horizontal direction.
- Dust-proof material 8 is lightweight and easy to move as a protective garment, but the wind is a little difficult to pass through, and when the wearability test is performed, the temperature in the protective garment after 30 minutes is 34.2 ° C.
- the wearing feeling was B, and the evaluation of the wearing test was D, which was inferior as protective clothing.
- the average humidity was 75% Rh.
- Example 2 Spunbond fabric 1 / electret nonwoven fabric 1 / spunbond fabric 1 in the same manner as in Example 1 except that the amount of hot melt adhesive applied to the first surface of the electret nonwoven fabric 1 was 0.4 g / m 2.
- a constructed dustproof material 9 was obtained.
- the composition of the obtained dustproof material 9 is shown in Table 3, and the measurement results of the characteristics are shown in Tables 4-6.
- the dust-proof material 5 has a basis weight of 57 g / m 2 , a fabric portion collection efficiency of 94%, a sewing portion collection efficiency of 89%, a breathability of 45 cm 3 / cm 2 / s, and the maximum ratio of the adhesion area of the six regions observed.
- the value was 3% and the minimum value was 1%, and all of the six bonded areas were outside the range of 5% to 10%.
- the tensile strength was 92.6 N / 50 mm in the vertical direction, 38.7 N / 50 mm in the horizontal direction, and the tear strength was 9.2 N in the vertical direction and 24.6 N in the horizontal direction, resulting in low tensile and tear strength.
- the structure of the obtained dustproof material 10 is shown in Table 3, and the measurement results of the characteristics are shown in Tables 4-6.
- the dust-proof material 10 has a basis weight of 72 g / m 2 , a fabric portion collection efficiency of 93%, a sewing portion collection efficiency of 88%, a breathability of 29 cm 3 / cm 2 / s, and the maximum ratio of the adhesion area of the six regions observed. The value was 16% and the minimum value was 14%.
- the tensile strength was 109.8 N / 50 mm in the vertical direction, 60.0 N / 50 mm in the horizontal direction, and the tear strength was 20.0 N in the vertical direction and 35.2 N in the horizontal direction.
- the composition of the obtained dustproof material 7 is shown in Table 3, and the physical property measurement results are shown in Tables 4-6.
- the dust-proof material 11 had a weight per unit area of 80 g / m 2 , a collection efficiency of 92%, a gas permeability of 18 cm 3 / cm 2 / s, a maximum value of six adhesion areas of 23%, and a minimum value of 20%.
- the tensile strength was 112.6 N / 50 mm in the vertical direction, 61.2 N / 50 mm in the horizontal direction, and the tear strength was 21.1 N in the vertical direction and 36.3 N in the horizontal direction.
- the protective clothing using the dust-proof material of the example satisfying the requirements of the present invention was breathable and reduced the stuffiness when worn, and was excellent in clothing comfort. Moreover, it was a dust-proof material suitable for sewing with a sewing needle.
- Protective clothing using the dustproof material of the present invention is useful for wearing in a dusty atmosphere.
- Electrometer 6 Post-peeling fiber layer 6A: Post-peeling / non-woven fabric fiber removing fiber layer 6B: Post-peeling / non-woven fabric fiber part-removing fiber layer 7: Surface 8 adhered to the electret nonwoven layer 8: Adhesive 9: Fiber derived from the electret nonwoven layer adhered to the fiber layer by the adhesive 10: Electret nonwoven layer adhered to the fiber layer without contact with the adhesive Origin fiber 11: Dust-proof material 12: Small dust-proof material 13-24: Samples A to L
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Abstract
Description
(1)iおよびiiの特徴を有する防塵材料を用いた防護服。
i)防塵材料は繊維層およびエレクトレット不織布層を有し、前記繊維層および前記エレクトレット不織布層の数の和は2以上である。
ii)防塵材料は、隣接する繊維層とエレクトレット不織布層とが5%以上10%以下の面積比率の領域で接着されている。
(2)防塵材料の前記エレクトレット不織布層が、メルトブロー不織布またはスパンボンド不織布である、上記防護服。
(3)防護材料の通気性が30cm3/cm2/s以上である、上記いずれかの防護服。
(4)前記エレクトレット不織布層がメルトブロー不織布であって、このメルトブロー不織布が以下の量の添加剤を含有する上記いずれかの防護服。
iii)ヒンダードアミン系添加剤を0.5~5質量%もしくはトリアジン系添加剤を0.5~5質量%を含有する。
または
iv)ヒンダードアミン系添加剤およびトリアジン系添加剤を必須とし、合計0.5~5質量%を含有する。
(5)防塵材料の前記繊維層と前記エレクトレット不織布層とを接着する接着剤がホットメルト接着剤である上記いずれかの防護服。
(6)前記繊維層と前記エレクトレット不織布層とを接着する前記ホットメルト接着剤の量が0.5g/m2以上3.0g/m2以下である上記いずれかの防護服。
(7)糸縫製部を有する上記いずれかの防護服。
本発明の防塵材料に用いるエレクトレット不織布層は、非導電性の繊維材料からなるシートであり、メルトブロー法またはスパンボンド法によって得ることができる。すなわち、エレクトレット不織布層はメルトブロー不織布またはスパンボンド不織布であることが好ましい。
メチルブチル)イミノ-1,3,5-トリアジン-2,4-ジイル)((2,2,6,6,-テトラメチル-4-ピペリジル)イミノ)ヘキサメチレン((2,2,6,6,-テトラメチル-4-ピペリジル)イミノ)〕(チバガイギー製、“キマソープ”944LD)、2-(4,6-ジフェニル-1,3,5-トリアジン-2-イル)-5-((ヘキシル)オキシ)-フェノール(チバガイギー製、“チヌビン”1577FF)などを挙げることができる。これらのなかでも特にヒンダードアミン系添加剤を使用することが好ましい。
非導電性繊維シートを走行させる。そのシートにスリット状の吸引ノズルをシートの幅全面方向に横切るように接触させる。かつこの接触部反対側のシートの面を水面に接触させるか又は浸漬させる。このような状態で吸引ノズルから水を吸引する。
吸引ノズルから水を吸引すると、吸引ノズルをシートに接触させた部分の反対側の水がシートを厚さ方向に貫通するように移動するため、水をシート内に厚さ方向全体に渡り浸透させることができる。また吸引ノズルをシート幅方向に横切るように配置し、かつシートを走行させながら吸引するから、上記シート厚さ方向全体に水を浸透させた状態をシート全面に満遍なく行き渡らせることができる。したがって、このシートを乾燥すると、シート全面に電荷が均一かつ高密度に帯電したエレクトレット化不織布になる。
続いて、防塵材料に用いる繊維層について述べる。
まず本発明の防塵材料の製造方法について述べる。本発明における防塵材料の製造方法の例としては、各構成材料の製造工程とそれらの材料の積層工程からなるものである。
捕集効率(%)=〔1-(d/D)〕×100
なお、高捕集の繊維シートほど、下流のダスト個数が少なくなるため、捕集効率の値は高くなる。
本発明の防塵材料は、カバーオール、カッパ、ガウン等の形に縫製することで防護服として好適に使用することができる。特に、放射性物質やアスベスト、ダイオキシンを含む焼却灰などの粉塵の進入を防ぐ上で、カバーオール型の防護服が好ましい。
防塵材料から防護服への縫製方法は、糸と針を用いた糸縫製法と糸と針を用いない超音波縫製などの無縫製法がある。中でも、糸縫製ミシンによる縫製は、加工性が高いため好ましい。糸縫製は、縫製部位に合わせて本縫いまたはロックミシンなど既存のミシンが使用できる。本縫いは上糸のループに下糸をくぐらせる方式であり、解けにくく強度に優れるため好ましく、ロックミシンは、編み合わせる縫い目であり、強い糸締まりがなく、布地の伸縮にも対応できるため好ましい。ミシン針の太さは、生地の構成に合わせて選択するが、一般的に、薄生地の場合、針番手9番(針の直径0.67mm)、厚生地の場合、針番手16番(針の直径1.02mm)が使用される。薄い生地を太い針で縫うと、生地の糸が切れたり、無理な力がかかったりしたときに縫目から裂ける場合がある。また、厚い生地を細い針で縫うと、針が曲がったり、折れたりする場合がある。防護服の場合、11番手から16番手が好ましい。ミシン糸は、スパン糸、ウーリー糸、高巻縮ウーリー糸など市販のものを使用できる。ミシン糸の番手は、30番手から90番手が使用できる。糸の素材は、絹糸や綿糸のような天然繊維と、石油などから作られたポリエステルやナイロンなどの合成繊維が使用でき、特に、ポリエステルが耐候性などの面から好ましく用いられる。針目数は、必要な縫目強度に合わせ、5針/3cmから10針/3cmが適している。
(1)単位面積当たりの質量(目付:g/m2)
JIS L 1913:2010 6.2に基づいて測定した。試料から25cm×25cmの大きさの試験片を,打抜き形又はテンプレートとかみそり刃とを用いて3枚以上採取し、その重さを測定し、平均値を求めた。それを単位面積当たりの質量(g/m2)とした。
防護服の両太もも部から4枚、両うでから4枚、胴体部分から2枚の防塵材料を切り出し、10枚のサンプルを採取した。それぞれの試料について、捕集性能測定装置で測定した。縫製部のサンプルは、JIS T8115(2015)付属書Aの手順C実施後の防護服から、両太もも部から4枚、両うでから4枚、胴体部分から2枚の10枚のサンプルを採取している。この捕集性能測定装置は、測定サンプルをセットするサンプルホルダーの上流側にダスト収納箱を連結し、下流側に流量計、流量調整バルブ、ブロワを連結している。また、サンプルホルダーにパーティクルカウンターを使用し、切り替えコックを介して、測定サンプルの上流側のダスト個数と下流側のダスト個数をそれぞれ測定することができる。さらに、サンプルホルダーは圧力計を備え、サンプル上流、下流の静圧差を読みとることができる。
捕集効率(%)=〔1-(d/D)〕×100
(3)電荷密度
図1により説明する。接地された金属製箱1と金属製平板電極2(面積100cm2、材質:真鍮)の間に試料3をはさみ、静電誘導によって発生した電荷を、コンデンサー4を介してエレクトロメーター5によって電圧を測定し、得られた電圧から次の式によって表面電荷密度を求めた。
Q:表面電荷密度(クーロン/cm2)
C:コンデンサー容量
V:電位
S:平板電極面積 。
JIS L 1913 6.8.1 a)フラジール形法に基づき、15cm×15cmの大きさで試験片を通過する空気量をn=3で測定し、その平均値を通気性とした。
夏場の外気温を想定した35℃、50%Rhに設定した恒温恒湿室に、被験者がTシャツ1枚(“AIRism”(登録商標、ユニクロ製))、作業ズボン(綿10%、ポリエステル90%)1枚の上から防護服を着用し入室した。被験者は、胸の中心付近に熱電対をシャツの上から貼り付け、入室後の防護服内の温度を熱電対にて測定した。これを3人の被験者に対して実施した。3人の被験者のデータをそれぞれ比較例1の防護服と比較して、30分後の防護服内の平均温度が2℃以上低いものをA、平均温度差が2℃未満のものをBと評価した。
夏場(7~9月)の気温30℃以上のときに防護服を着用し、外で1時間作業を行った。特に蒸れもなく作業性が非常に良好で防護服に破れ等の無いものをA、蒸れが若干あるが作業性が良好で作業服に破れ等の無いものをB,蒸れが高く作業性が悪いが防護服に破れ等の無いものをC,蒸れが非常に高く作業性が非常に悪かったり、作業服に破れや防塵材料が剥離したものをDとした。なお、本着用試験の被験者は1人である。
JIS L 1913:2010 6.3.1に基づき測定した。サイズ5cm × 30cmの試験片をつかみ間隔20cm 、引張速度10cm/minの条件でシート縦方向、横方向とも3個のサンプルについて定速伸長型引張試験機にて引張試験を行い、サンプルが破断するまで引っ張ったときの最大強力を引張強さとし、サンプルのタテ方向、ヨコ方向それぞれの平均値について算出した。ここで、タテ方向とは、サンプルのロールの長さ方向に平行な方向をいい、ヨコ方向とはサンプルのロール長さ方向に垂直な方向をいう。
JIS L 1913:2010 8.15.4 C法(トラベゾイド法)に基づき測定した。サイズ7.5cm×15cmのサンプルのタテ方向およびヨコ方向の引裂強さをそれぞれn=3で測定し平均値を算出した。ここで、タテ方向とは、サンプルのロールの長さ方向に平行な方向をいい、ヨコ方向とはサンプルのロール長さ方向に垂直な方向をいう。
JIS L1913:2010 6.1.1 A法に基づき測定した。試料から2500mm2以上の大きさの試験片を10枚採取し、厚さ測定器の上側円形水平板に0.5kPaの圧力をかけ,0点を調整した。その後、厚さ測定器を用いて,標準状態で試験片に0.5kpaの圧力を10秒間かけて、厚さを0.01mmまで測定した。試験片10枚の平均値を求めた。
JIS L 1913:2010 6.6.1 a)テーバー形法に基づいて測定した。試験片を3枚採取し、摩耗輪は、CS-10、摩擦回数を100回とし、外観変化を付図1の限度写真と比較して、その平均値を0.5級単位に丸めて表した。
JIS L 1913:2010 6.7.1 a)41.5°カンチレバー法に基づいて測定した。試験片をタテ方向から3枚採取して測定した。試料の表と裏で剛軟性が違う場合は、表と裏についてそれぞれ試験を行った。そのタテ方向の平均値を剛軟性とした。
防護服の両太もも部から4枚、両うでから4枚、胴体部分から2枚の計10枚の防塵材料を切り出した。それぞれの防塵材料について、電子顕微鏡で倍率500倍で写真撮影を行い、1枚の写真につき任意の15本の繊維の直径を測定し、これを10枚の写真について行い、平均繊維径はその平均値で表した。
図3を参照する。長辺240mm×短辺180mmの長方形の防塵材料11を用意した。この防塵材料11を、長辺を4等分し、短辺を3等分し、60mm角に分割した、12枚の小防塵材料12を得た。次に分割した小防塵材料12から、小防塵材料12と中心点が同一であり、かつ、2辺が防塵材料11の長辺と平行であり、残りの2辺が防塵材料11の短辺と平行である20mm角のサンプルを切り出し、合計で12点のサンプルA~Lを得た。ここでいうサンプルA~Lは、図3に示すサンプル13~24に相当する。
なお、繊維層とエレクトレット不織布層とにより形成される層間を2以上有する防塵材料においては、各界面で上記と同様の測定を行い接着面積を算出した。
JIS Z 8803 9.4.4単一円筒形回転粘度計による測定法に基づいて測定した。B型回転粘度計(ブルックフィールド社製)を用い、140℃における粘度を求めた。
20℃、50%Rhに設定した恒温恒湿室に、被験者がTシャツ1枚(“AIRism”(登録商標、ユニクロ製))、作業服上下(綿10%、ポリエステル90%)の上から防護服を着用し、保護具(ゴム手袋、ヘルメット、長靴)を装着しテープで固定した。被験者は、背中の中心付近に“おんどとり”(登録商標、ティアンドデイ製 TR-71nw)をシャツの上から貼り付け、入室後、足踏み(14歩/10秒)を実施し、防護服内の湿度を10秒毎に測定した。なお、扇風機(YUASA製 YT-4001K(WH))を風量“中”にて背中から50cm離れた位置から風をあてた。これを3人の被験者に対して実施した。3人の被験者のデータをそれぞれ比較例1の防護服と比較して、45分後の防護服内の平均湿度が20%以上低いものをA、10%以上20%未満低いものをB、平均湿度差が10%未満のものをCと評価した。
JIS T 8051:2005に基づき測定した。試料か直径55mmの大きさの試験片を防護服の太もも部から2枚、両うでから2枚の計4枚の防塵材料を採取し、針侵入速度を100mm/分とし、定速伸長型引張試験機にて突き刺し試験を行い、試験片4枚の平均値を求めた。
試験鍾をミシン針14番手に変えた他は(16)項のJIS T 8051:2005に準拠して測定した。試料は直径55mmの大きさの試験片を防護服の太もも部から2枚、両うでから2枚の計4枚の防塵材料を採取し、針侵入速度を100mm/分とし、定速伸長型引張試験機にて15mmの突き刺し試験を行い、試験片4枚の平均値を求めた。
JIS L 1089:2007に記載の方法に準拠して測定した。繊維層と繊維層の界面で剥がしてきっかけを作り、万能試験機(島津製作所製オートグラフAG-IS)を用いて、幅25mm、長さ300mmに切り出した試験片を、つかみ間隔50mm、引張速度150mm/分の条件でシート縦方向、横方向とも3個のサンプルについて定速伸長型引張試験機にてT字(180°)に剥離した時の剥離試験を行った。評価は、JIS L 1089:2007の図5に示すように、剥離するときに示す極大値の大きいものから順次3個、小さいものから順次3個を採り、計6個の平均値を算出した。
防塵材料を2枚重ねて、30m縫製を継続した。縫製は、1本針本縫いミシンを用いて、針11番手、糸がポリエステル90番手、10針/3cmの条件にて行い、異常が見られないものをG、目飛びや縫いジワ、ミシン針折れ、糸切れしたものをPとした。
防塵材料を手で触り、ホットメルト接着剤の粘着性を感じるものを×、ホットメルト接着剤の粘着性を感じないものを○とした。
JIS T 8032-2:2015に記載の方法に準拠して測定した。JISの規格を満たすものを合格とし、JISの規格を満たさないものを不合格とした。
繊維層用の布帛には次のものを用いた。物性を表1に示す。
ポリプロピレン製スパンボンド不織布(通気性220cm3/cm2/s、目付15g/m2、引張強さ:タテ46.3N/50mm、ヨコ17.5N/50mm、耐摩耗性:4.5級、剛軟性:73mm)。
エレクトレット不織布層用の布帛および比較例に用いた対照用の布帛には次のものを用いた。物性を表2に示す。
ポリプロピレン製メルトブロー不織布(ヒンダードアミン系添加剤1質量%含有、エレクトレット加工有り、電荷密度8.5×10-9クーロン/cm2、通気性44cm3/cm2/s、目付20g/m2、平均繊維径2μm)。
ポリプロピレン製メルトブロー不織布(ヒンダードアミン系添加剤1質量%含有、エレクトレット加工有り、電荷密度8.5×10-9クーロン/cm2、通気性95cm3/cm2/s、目付18g/m2、平均繊維径4μm)。
ポリプロピレン製メルトブロー不織布(ヒンダードアミン系添加剤1質量%含有、エレクトレット加工有り、電荷密度8.5×10-9クーロン/cm2、通気性120cm3/cm2/s、目付16g/m2、平均繊維径6μm)。
(A)ホットメルト接着剤A
“モレスコメルト”TN-367Z(モレスコ社製)、140℃の溶融粘度1200mPa・s、軟化点82℃。
(B)ホットメルト接着剤B
“モレスコメルト”TN-255Z(モレスコ社製)、140℃の溶融粘度14250mPa・s、軟化点102℃。
(C)ホットメルト接着剤C
“モレスコメルト”AC-831Z(モレスコ社製)、160℃の溶融粘度4000mPa・s、軟化点122℃。
ホットメルト接着機にて、150℃に加温し溶融させたホットメルト接着材Aを、エレクトレット不織布1の第1の面に塗布量が2g/m2となるようTダイからスプレー状に塗布し、その後、スパンボンド布帛1をエレクトレット不織布1の第1の面に貼り合わせた。得られたスパンボンド布帛1/エレクトレット不織布1の2層積層品を巻取った。表裏を反対にして、再度エレクトレット不織布1の第2の面に、先の工程と同様にホットメルト接着材Aを塗布量が2g/m2となるようスプレー状に塗布し、その後、スパンボンド布帛1をエレクトレット不織布1の第2の面に貼り合わせた。その結果スパンボンド布帛1/エレクトレット不織布1/スパンボンド布帛1の順の構成をもつ防塵材料1を得た。得られた防塵材料1の構成を表3に示し、その特性の測定結果を表4~6に示す。防塵材料1は、目付60g/m2、生地部の捕集効率92%、縫製部捕集効率89%、通気性42cm3/cm2/s、観察した6つの領域における接着面積の比率の最大値は9%で最小値が7%であた。引張り強さはタテ方向103.3N/50mm、ヨコ方向50.3N/50mm、引裂き強さはタテ方向15.4N,ヨコ方向30.2Nであった。
エレクトレット不織布1の第1の面へのホットメルト接着剤の塗布量を1g/m2とした以外は実施例1と同様にしてスパンボンド布帛1/エレクトレット不織布1/スパンボンド布帛1の順の構成をもつ防塵材料2を得た。得られた防塵材料2の構成を表3に示し、その特性の測定結果を表4~6に示す。防塵材料2は、目付58g/m2、生地部の捕集効率91%、縫製部捕集効率89%、通気性44cm3/cm2/s、観察した6つの領域の接着面積の比率の最大値が6%で最小値が5%であった。引張り強さはタテ方向98.5N/50mm、ヨコ方向45.9N/50mm、引裂き強さはタテ方向13.0N,ヨコ方向28.8Nであった。
エレクトレット不織布1の第1の面へのホットメルト接着剤の塗布量を4g/m2とした以外は実施例1と同様にしてスパンボンド布帛1/エレクトレット不織布1/スパンボンド布帛1の防塵材料3を得た。得られた防塵材料3の構成を表3に示し、その特性の測定結果を表4~6に示す。防塵材料3は、目付64g/m2、生地部の捕集効率93%、縫製部捕集効率89%、通気性38cm3/cm2/s、観察した6つの領域の接着面積の比率の最大値が10%で最小値が8%であった。引張り強さはタテ方向106.8N/50mm、ヨコ方向54.4N/50mm、引裂き強さはタテ方向17.2N,ヨコ方向32.5Nであった。
ホットメルト接着材Aをホットメルト接着剤Bに変え、塗布量を1g/m2とした以外は、実施例1と同様にしてスパンボンド布帛1/エレクトレット不織布1/スパンボンド布帛1の順に構成された防塵材料4を得た。得られた防塵材料4の構成を表3に示し、その特性の測定結果を表4~6に示す。防塵材料4は、目付58g/m2、生地部の捕集効率92%、縫製部捕集効率88%、通気性46cm3/cm2/s、観察した6つの領域の接着面積の比率の最大値が9%で最小値が6%であった。引張り強さはタテ方向103.0N/50mm、ヨコ方向51.1N/50mm、引裂き強さはタテ方向15.7N,ヨコ方向30.6Nであった。
エレクトレット不織布1をエレクトレット不織布2に変えた以外は、実施例2と同様にしてスパンボンド布帛1/エレクトレット不織布2/スパンボンド布帛1の防塵材料5を得た。得られた防塵材料5の構成を表3に示し、その特性の測定結果を表4~6に示す。防塵材料5は、目付56g/m2、生地部の捕集効率55%、縫製部捕集効率50%、通気性60cm3/cm2/s、観察した6つの領域の接着面積の比率の最大値が9%で最小値が6%であった。引張り強さはタテ方向104.0N/50mm、ヨコ方向52.0N/50mm、引裂き強さはタテ方向15.9N,ヨコ方向31.1Nであった。
ホットメルト接着材Aをホットメルト接着剤Cに変え、また塗布量を1g/m2とした以外は、実施例1と同様にしてスパンボンド布帛1/エレクトレット不織布1/スパンボンド布帛1の順に構成された防塵材料6を得た。得られた防塵材料6の構成を表3に示し、その特性の測定結果を表4~6に示す。防塵材料6は、目付58g/m2、生地部の捕集効率90%、縫製部捕集効率87%、通気性47cm3/cm2/s、観察した6つの領域の接着面積の比率の最大値が9%で最小値が6%であった。引張り強さはタテ方向129.8N/50mm、ヨコ方向50.5N/50mm、引裂き強さはタテ方向15.1N,ヨコ方向29.9Nであった。
エレクトレット不織布1をエレクトレット不織布3に変えた以外は、実施例2と同様にしてスパンボンド布帛1/エレクトレット不織布3/スパンボンド布帛1の順に構成された防塵材料7を得た。得られた防塵材料7の構成を表3に示し、その特性の測定結果を表4~6に示す。防塵材料7は、目付54g/m2、生地部の捕集効率40%、縫製部捕集効率35%、通気性90cm3/cm2/s、観察した6つの領域の接着面積の比率の最大値が9%で最小値が7%であった。引張り強さはタテ方向105.2N/50mm、ヨコ方向52.2N/50mm、引裂き強さはタテ方向15.9N,ヨコ方向30.5Nであった。
市販のポリエチレン製フラッシュスパン不織布1層の防護服から、生地を切り取り、物性を測定し、防塵材料8とした。その測定結果を表3および表4に示す。
エレクトレット不織布1の第1の面へのホットメルト接着剤の塗布量を0.4g/m2とした以外は実施例1と同様にしてスパンボンド布帛1/エレクトレット不織布1/スパンボンド布帛1の順に構成される防塵材料9を得た。得られた防塵材料9の構成を表3に示し、その特性の測定結果を表4~6に示す。防塵材料5は、目付57g/m2、生地部の捕集効率94%、縫製部捕集効率89%、通気性45cm3/cm2/s、観察した6つの領域の接着面積の比率の最大値が3%で最小値が1%であり、6つの接着面積のすべてが5%以上10%以下の範囲外であった。引張り強さはタテ方向92.6N/50mm、ヨコ方向38.7N/50mm、引裂き強さはタテ方向9.2N,ヨコ方向24.6Nでとなり、引張り及び引裂き強さが低い結果となった。
エレクトレット不織布1の第1の面へのホットメルト接着剤の塗布量を8g/m2とした以外は実施例1と同様にしてスパンボンド布帛1/エレクトレット不織布1/スパンボンド布帛1の防塵材料10を得た。得られた防塵材料10の構成を表3に示し、その特性の測定結果を表4~6に示す。防塵材料10は、目付72g/m2、生地部の捕集効率93%、縫製部捕集効率88%、通気性29cm3/cm2/s、観察した6つの領域の接着面積の比率の最大値が16%で最小値が14%であった。引張り強さはタテ方向109.8N/50mm、ヨコ方向60.0N/50mm、引裂き強さはタテ方向20.0N,ヨコ方向35.2Nであった。
エレクトレット不織布1の第1の面へのホットメルト接着剤の塗布量を12g/m2とした以外は実施例1と同様にしてスパンボンド布帛1/エレクトレット不織布1/スパンボンド布帛1の防塵材料11を得た。得られた防塵材料7の構成を表3に示し、その物性測定結果を表4~6に示す。防塵材料11は、目付80g/m2、捕集効率92%、通気性18cm3/cm2/s、6つの接着面積の最大値が23%で最小値が20%であった。引張り強さはタテ方向112.6N/50mm、ヨコ方向61.2N/50mm、引裂き強さはタテ方向21.1N,ヨコ方向36.3Nであった。
2:金属製平板電極
3:試料
4:コンデンサー
5:エレクトロメーター
6:剥離後繊維層
6A:剥離後・不織布繊維除去繊維層
6B:剥離後・不織布繊維部分除去繊維層
7:エレクトレット不織布層と接着していた面
8:接着剤
9:接着剤により繊維層に付着しているエレクトレット不織布層由来の繊維
10:接着剤と接触せずに繊維層に付着しているエレクトレット不織布層由来の繊維
11:防塵材料
12:小防塵材料
13~24:サンプルA~L
Claims (7)
- 以下の防塵材料を用いた防塵服。
i)防塵材料は繊維層およびエレクトレット不織布層を有し、前記繊維層および前記エレクトレット不織布層の数の和は2以上である。
ii)防塵材料は、隣接する繊維層とエレクトレット不織布層とが5%以上10%以下の面積比率の領域で接着されている。 - 防塵材料の前記エレクトレット不織布層が、メルトブロー不織布またはスパンボンド不織布である、請求項1記載の防護服。
- 防護材料の通気性が30cm3/cm2/s以上である、請求項1または2記載の防護服。
- 前記エレクトレット不織布層がメルトブロー不織布であって、このメルトブロー不織布が以下の量の添加剤を含有する請求項1~3いずれかに記載の防護服。
iii)ヒンダードアミン系添加剤を0.5~5質量%もしくはトリアジン系添加剤を0.5~5質量%を含有する。
または
iv)ヒンダードアミン系添加剤およびトリアジン系添加剤を必須とし、合計0.5~5質量%を含有する。 - 防塵材料の前記繊維層と前記エレクトレット不織布層とを接着する接着剤がホットメルト接着剤である請求項1~4のいずれかに記載の防護服。
- 前記繊維層と前記エレクトレット不織布層とを接着する前記ホットメルト接着剤の量が0.5g/m2以上3.0g/m2以下である請求項5記載の防護服。
- 糸縫製部を有する請求項1~6のいずれかに記載の防護服。
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CN201580070147.0A CN107109781A (zh) | 2014-12-26 | 2015-12-22 | 防护服 |
MYPI2017702345A MY189183A (en) | 2014-12-26 | 2015-12-22 | Protective clothing |
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BR112017011036-9A BR112017011036A2 (ja) | 2014-12-26 | 2015-12-22 | Protective garment |
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EP (1) | EP3239394B1 (ja) |
JP (1) | JP6844257B2 (ja) |
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CN (1) | CN107109781A (ja) |
BR (1) | BR112017011036A2 (ja) |
MX (1) | MX2017007912A (ja) |
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WO2019171996A1 (ja) * | 2018-03-09 | 2019-09-12 | 東レ株式会社 | 帯電防止粉塵防護生地およびそれを使用した防護服 |
WO2019171995A1 (ja) * | 2018-03-09 | 2019-09-12 | 東レ株式会社 | 帯電防止粉塵防護生地およびそれを使用した防護服 |
WO2020250565A1 (ja) * | 2019-06-13 | 2020-12-17 | 東レ株式会社 | 防護服 |
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WO2019171995A1 (ja) * | 2018-03-09 | 2019-09-12 | 東レ株式会社 | 帯電防止粉塵防護生地およびそれを使用した防護服 |
US20200404986A1 (en) * | 2018-03-09 | 2020-12-31 | Toray Industries, Inc. | Antistatic dustproof fabric and protective clothing using same |
JPWO2019194087A1 (ja) * | 2018-04-02 | 2021-02-18 | 東レ株式会社 | 着用快適性に優れた衣服 |
JP7439512B2 (ja) | 2018-04-02 | 2024-02-28 | 東レ株式会社 | 着用快適性に優れた衣服 |
WO2020250565A1 (ja) * | 2019-06-13 | 2020-12-17 | 東レ株式会社 | 防護服 |
EP3984395A4 (en) * | 2019-06-13 | 2023-07-12 | Toray Industries, Inc. | PROTECTIVE CLOTHING |
JP6897898B1 (ja) * | 2019-06-13 | 2021-07-07 | 東レ株式会社 | 防護服 |
WO2021049375A1 (ja) * | 2019-09-11 | 2021-03-18 | 東レ株式会社 | 防護服 |
JP7456384B2 (ja) | 2019-09-26 | 2024-03-27 | 東レ株式会社 | 衣服 |
WO2022030280A1 (ja) * | 2020-08-05 | 2022-02-10 | 東レ株式会社 | 防護服およびその製造方法 |
Also Published As
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EP3239394B1 (en) | 2020-01-29 |
JP6844257B2 (ja) | 2021-03-17 |
US20170326485A1 (en) | 2017-11-16 |
KR20170098797A (ko) | 2017-08-30 |
SG11201704978YA (en) | 2017-07-28 |
JPWO2016104492A1 (ja) | 2017-09-28 |
BR112017011036A2 (ja) | 2018-01-09 |
EP3239394A4 (en) | 2018-07-25 |
MX2017007912A (es) | 2017-09-05 |
KR102528865B1 (ko) | 2023-05-04 |
CN107109781A (zh) | 2017-08-29 |
EP3239394A1 (en) | 2017-11-01 |
MY189183A (en) | 2022-01-31 |
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