JPWO2019059203A1 - Protective clothing fabric - Google Patents

Abstract

In particular, it is an object of the present invention to provide a protective clothing fabric having excellent liquid permeation suppressing performance and excellent air permeability for oil. A protective clothing fabric having at least a spunbond nonwoven fabric layer (A) and a meltblown nonwoven fabric layer mainly composed of an olefin resin, wherein the spunbond nonwoven fabric layer (A) and the meltblown nonwoven fabric layer are directly laminated. The spunbond nonwoven fabric layer (A) is composed of fibers having an average fiber diameter of 18 μm or more and 30 μm or less, a thickness of 150 μm or more and 300 μm or less, and a bulk density of 0.20 g / cm 3 or more and 0.40 g / cm 3. In addition, the fluorine-containing mass in the spunbond nonwoven fabric layer (A) is 500 ppm or more with respect to the entire spunbond nonwoven fabric layer (A), and the meltblown nonwoven fabric layer has an average fiber diameter of 3 μm or more and 8 μm or less. It is made of fiber, has a thickness of 100 μm or more and 200 μm or less, and a bulk density of 0.20 g / cm 3. The cloth for protective clothing, which is 0.40 g / cm 3 or less, and further, the content mass of fluorine in the melt blown nonwoven fabric layer is 100 ppm or less with respect to the entire melt blown nonwoven fabric layer.

Description

  The present invention relates to a protective clothing fabric.

  Conventionally, in the work of removing dust and chemical substances and the work of handling dust and chemical substances, the worker has to wear protective clothing, rubber gloves, rubber boots and a dust mask (hereinafter referred to as protective items) on the clothes. There is a lot of work. In addition, due to diversification of the environment in which protective items are used, protective items may be worn for the purpose of antifouling in environments where oil is used, such as in the steel industry.

  Here, in Patent Document 1, as a protective sheet against liquid chemical substances and particulate substances, an upper layer, an intermediate layer of a nonwoven fabric composed of fibers having an average single fiber diameter of 10 nm to 2000 nm, and a lower layer are laminated. A protective sheet has been proposed in which the lower layer AATCC Test Method 118-2002 has an oil repellency of 3 or higher. Patent Document 1 discloses that the oil repellency of the AATCC Test Method 118-2002 of the intermediate layer is also preferably 3 or more. This protective sheet employs a non-woven fabric composed of fibers having an average single fiber diameter of 10 nm or more and 2000 nm or less as an intermediate layer, and the intermediate layer or the lower layer is subjected to an oil-repellent treatment so as to be liquid. Patent Document 1 discloses that penetration of chemical substances and particulate substances can be suppressed.

JP 2014-24237 A

  Patent Document 1 discloses that the oil repellency of AATCC Test Method 118-2002 of the intermediate layer and the lower layer provided in the protective sheet is grade 3 or higher. However, in order to make the oil repellency of the AATCC Test Method 118-2002 of the intermediate layer or the lower layer 3 or more, it is not sufficient to attach an oil repellent to the intermediate layer or the lower layer. It is necessary to make the thickness of the intermediate layer and the lower layer, the bulk density of the intermediate layer and the lower layer, and the fiber diameter of the fibers constituting the intermediate layer and the lower layer within an appropriate range after adding the oil agent. And the protective sheet provided with the intermediate layer and the lower layer obtained as described above is excellent in the ability to suppress the penetration of the liquid chemical substance (hereinafter sometimes referred to as the liquid penetration inhibiting ability), but the air permeability is high. Inferior, in the protective clothing using this protective sheet, the present inventors have found a problem that the wearer tends to feel stuffiness.

  On the other hand, in order to improve the air permeability of the protective sheet, the thickness of the intermediate layer or the lower layer is decreased, the bulk density of the intermediate layer or the lower layer is decreased, or the fiber diameter of the fibers constituting the intermediate layer or the lower layer is increased. However, although the air permeability of the protective sheet is improved, the oil repellency of the AATCC Test Method 118-2002 of the intermediate layer or the lower layer is lowered, and there is a problem that sufficient liquid permeation suppression ability cannot be obtained. The inventor found out.

  Then, in view of said situation, this invention makes it a subject to provide the cloth for protective clothing provided with the liquid penetration suppression performance outstanding with respect to oil especially, and the outstanding air permeability.

In order to solve the problem, the present invention discloses the following protective clothing fabric.
(1) A protective clothing fabric having at least a spunbond nonwoven fabric layer (A) and a meltblown nonwoven fabric layer mainly composed of an olefin resin, wherein the spunbond nonwoven fabric layer (A) and the meltblown nonwoven fabric layer are directly laminated. The spunbond nonwoven fabric layer (A) is composed of fibers having an average fiber diameter of 18 μm to 30 μm, a thickness of 150 μm to 300 μm, and a bulk density of 0.20 g / cm ^{3 to} 0. .40 g / cm ³ or less, and the content mass of fluorine in the spunbond nonwoven fabric layer (A) is 500 ppm or more with respect to the entire spunbond nonwoven fabric layer (A), and the meltblown nonwoven fabric layer has an average fiber diameter. It is composed of fibers of 3 μm or more and 8 μm or less, the thickness is 100 μm or more and 200 μm or less, and the bulk density is 0.20 g. cm ³ or more 0.40 g / cm ³ or less, further containing the mass of fluorine in the melt-blown nonwoven fabric layer is 100ppm or less with respect to the entire melt-blown nonwoven fabric layer, the protective dose fabric.
(2) The spunbond nonwoven fabric layer (A) is
The fabric for protective clothing of (1) containing a compound having any one of C1 to C6 perfluoroalkyl groups.
(3) The fabric for protective clothing according to any one of (1) to (2), wherein the meltblown nonwoven fabric is an electret meltblown nonwoven fabric.
(4) One of (1) to (3), further comprising a spunbond nonwoven fabric layer (B), wherein the spunbond nonwoven fabric layer, the meltblown nonwoven fabric layer, and the spunbond nonwoven fabric layer (B) are laminated in this order. Fabric for protective clothing.
(5) Protective clothing using the protective clothing fabric according to (1) to (4), wherein the spunbond nonwoven fabric layer (A) and the melt blown nonwoven fabric layer are arranged in this order from the inside of the protective clothing. , Protective clothing.

  ADVANTAGE OF THE INVENTION According to this invention, the cloth for protective clothing provided with the liquid penetration suppression performance outstanding with respect to oil especially and the outstanding air permeability can be provided.

Cross-sectional conceptual diagram of the first embodiment of the protective clothing fabric of the present invention Sectional drawing of the oil dripped on the fabric for protective clothing shown in FIG. Cross-sectional conceptual diagram of oil dripped on spunbond nonwoven fabric layer (A) provided in protective clothing fabric Sectional conceptual diagram of the second embodiment of the fabric for protective clothing of the present invention SEM image view conceptual diagram of cross section of protective clothing fabric

  The protective fabric and protective clothing of the present invention will be described in detail.

  The fabric for protective clothing of the present invention is a fabric for protective clothing having at least a specific spunbond nonwoven fabric layer (A) having a high oil repellency and a specific melt blown nonwoven fabric layer having a low oil repellency, The bond nonwoven fabric layer (A) and the melt blown nonwoven fabric layer are directly laminated. In the protective clothing fabric having such a configuration, the permeation of oil through the protective clothing fabric is suppressed by adsorbing the oil with the melt blown nonwoven fabric layer while suppressing the permeation of the oil with the spunbond nonwoven fabric layer (A). Is possible. Note that the term “directly laminated” as used herein means that the spunbond nonwoven fabric layer (A) and the melt blown nonwoven fabric layer are laminated, and it is a concept including a form having nothing between these layers. In addition, the spunbond nonwoven fabric layer (A) and the melt blown nonwoven fabric layer are laminated, and include a form in which cavities and adhesives for the purpose of adhesion of these layers are dispersed between these layers. It is a concept. In addition, the main component of polyolefin-based resin is that the melt-blown nonwoven fabric layer contains more than 80% by mass of polyolefin-based resin with respect to the total mass of the melt-blown nonwoven fabric layer.

  In order to increase the liquid permeation suppression performance of the protective clothing fabric with respect to oil, it is common to increase the oil repellency of at least some layers of the protective clothing fabric. However, in order to increase the oil repellency of the protective clothing fabric, an oil repellant is added to the above layer, and then the fiber diameter of the fibers constituting the above layer is reduced in order to reduce the gap through which the oil penetrates. However, it is necessary to increase the bulk density of the above layer and increase the thickness of the above layer, and there is a problem that the air permeability of the protective clothing fabric is lowered.

  The protective clothing fabric of the present invention adopts the configuration as described above, whereby the liquid penetration inhibiting ability of the protective clothing fabric with respect to oil and the air permeability of the protective clothing fabric are both at a high level. Can be realized. In the present invention, the ability to suppress liquid permeation to oil refers to the oil from the surface side where the melt blown nonwoven fabric layer of the protective clothing fabric is disposed to the surface side where the spunbond nonwoven fabric layer (A) of the protective clothing fabric is disposed. Refers to the function of inhibiting the penetration of protective fabrics.

[Spunbond nonwoven fabric layer (A)]
Examples of the fibers constituting the spunbond nonwoven fabric layer (A) included in the protective clothing fabric of the present invention include synthetic fibers and natural fibers, but it is preferable to use synthetic fibers because the fiber diameter can be arbitrarily set. .

  Examples of the material of the fibers constituting the spunbond nonwoven fabric layer (A) include polyolefins such as polyethylene and polypropylene, polyesters such as polyethylene terephthalate and polylactic acid, polycarbonate, polystyrene, polyphenylene sulfite, fluororesin, and mixtures thereof. And so on. Among these, polyolefin is preferable from the viewpoint that the productivity of the protective clothing fabric and the texture of the protective clothing fabric are excellent.

  The average fiber diameter of the fibers constituting the spunbond nonwoven fabric layer (A) is 18 μm or more and 30 μm or less. The average fiber diameter is preferably 20 μm or more. The average fiber diameter is preferably 25 μm or less. Since the average fiber diameter is 18 μm or more, when air passes through the spunbonded nonwoven fabric layer (A), the surface area of the fibers constituting the spunbonded nonwoven fabric layer (A) in contact with air can be reduced. The air permeability of the spunbond nonwoven fabric layer (A) is excellent, and as a result, the air permeability of the protective clothing fabric can be obtained. Moreover, when the average fiber diameter is 30 μm or less, the oil repellency of the spunbond nonwoven fabric layer (A) containing fluorine is improved, and the liquid permeation suppression performance of the protective fabric for oil is excellent.

  In addition, the thinning of the average fiber diameter of the fibers constituting the spunbond nonwoven fabric layer (A), for example, when producing the fibers constituting the spunbond nonwoven fabric layer (A), the amount of resin discharged is small and the discharge speed is reduced. This can be achieved quickly by increasing the fiber drawing.

  The thickness of the spunbond nonwoven fabric layer (A) is 150 μm or more and 300 μm or less. The thickness of the spunbond nonwoven fabric layer (A) is preferably 180 μm or more. The thickness of the spunbond nonwoven fabric layer (A) is preferably 250 μm or less. When the thickness of the spunbond nonwoven fabric layer (A) is 300 μm or less, it becomes possible to obtain good air permeability of the fabric for protective clothing, and when the thickness of the spunbond nonwoven fabric layer (A) is 150 μm or more, the fabric for protective clothing The liquid permeation suppression performance with respect to oil is further improved.

The bulk density of the spunbond nonwoven fabric layer (A) is 0.20 g / cm ³ or more and 0.40 g / cm ³ or less. When the bulk density of the spunbond nonwoven fabric layer (A) is 0.40 g / cm ³ or less, it is possible to obtain good air permeability of the fabric for protective clothing, and the bulk density of the spunbond nonwoven fabric layer (A) is 0.00. The liquid penetration suppression performance with respect to the oil of the cloth for protective clothing improves more because it is 20 g / cm ³ or more.

  The content mass of fluorine in the spunbond nonwoven fabric layer (A) is 500 ppm or more. If the fluorine-containing mass of the spunbond nonwoven fabric layer (A) is 500 ppm or more, the liquid penetration inhibiting performance of the protective clothing fabric with respect to oil will be excellent. And since the liquid permeation | infiltration suppression performance with respect to the oil of the clothing for protective clothing becomes more excellent in the content mass of the fluorine of a spunbond nonwoven fabric layer (A) being 1500 ppm or more, content of the fluorine of a spunbond nonwoven fabric layer (A) The mass is preferably 1500 ppm or more. The upper limit of the fluorine-containing mass is not particularly limited, but even if the fluorine-containing mass of the spunbond nonwoven fabric layer (A) is 3000 ppm or more, the liquid permeation suppression performance for oil of the protective clothing fabric does not improve so much. The content mass of fluorine in the nonwoven fabric layer (A) is preferably 3000 ppm or less. The measurement of the fluorine-containing mass of the spunbond nonwoven fabric layer (A) is performed by AATCC Test Method 189-2007.

  Fluorine contained in the spunbond nonwoven fabric layer (A) provided in the protective clothing fabric of the present invention is contained in the spunbond nonwoven fabric layer (A) as a compound containing a perfluoroalkyl group having 1 to 6 carbon atoms. It is preferable. More preferably, it is contained in the spunbonded nonwoven fabric layer (A) as a compound containing a C6 perfluoroalkyl group. When the spunbond nonwoven fabric layer (A) contains fluorine as a compound containing a C6 perfluoroalkyl group, the oil repellency of the spunbond nonwoven fabric layer (A) becomes more excellent, As a result, the liquid penetration inhibiting performance of the protective clothing fabric with respect to oil becomes more excellent. Here, the compound containing a perfluoroalkyl group is not particularly limited as long as it is a fluorine-containing compound and used as an oil repellent, but acrylic acid having a perfluoroalkyl group as an ester group. It is possible to use an oil repellent treatment agent using ester or methacrylic acid ester.

  As a method of including fluorine in the spunbond nonwoven fabric layer (A), a method of impregnating the spunbond nonwoven fabric layer (A) into the oil repellent containing fluorine, the spunbond nonwoven fabric layer (A) by spraying or gravure roll. It is possible to use a method such as a method of applying to the spunbond nonwoven fabric layer (A) by impregnation from the viewpoint of penetrability of the fluorine-containing oil repellent agent into the spunbond nonwoven fabric layer (A). It is preferable to adopt a method of including fluorine in

  As described above, the air permeability of the protective clothing fabric and the oil repellency of the protective clothing fabric are contradictory properties. For example, when the average fiber diameter of the fibers constituting the spunbond nonwoven fabric layer (A) is large, the spunbond nonwoven fabric layer (A) is thick, and the spunbond nonwoven fabric layer (A) has a high bulk density, The oil repellency of the layer (A) is high, and the liquid penetration inhibiting performance of the protective clothing fabric with respect to the oil is excellent. On the other hand, the air permeability of the protective clothing fabric provided with this spunbond nonwoven fabric layer (A) Will decline. And conversely, when the average fiber diameter of the fibers constituting the spunbond nonwoven fabric layer (A) is thin, the thickness of the spunbond nonwoven fabric layer (A) is thin, and the bulk density of the spunbond nonwoven fabric layer (A) is low, The air permeability of the fabric for protective clothing provided with the spunbond nonwoven fabric layer (A) is excellent. On the other hand, the oil repellency of the spunbond nonwoven fabric layer (A) is low, and the liquid for the oil for the clothing for protective clothing is low. The permeation suppression performance is inferior. However, the main component is a specific spunbond nonwoven fabric layer (A) having high oil repellency and excellent air permeability, and a specific polyolefin resin having low oil repellency and excellent air permeability, as in the protective clothing fabric of the present invention. In the protective clothing fabric having the melt blown nonwoven fabric layer and the above spunbond nonwoven fabric layer (A) and the melt blown nonwoven fabric layer directly laminated, the oil has high liquid permeation suppression performance and high air permeability. The present inventor has found that it is possible to achieve both, and has reached the present invention.

  The inventor presumes that, in the protective clothing fabric of the present invention, the mechanism by which the above-described effect is obtained will be described with reference to the drawings as follows. FIG. 1: shows the cross-sectional conceptual diagram of one Embodiment of the fabric for protective clothing of this invention. FIG. 2 shows a conceptual diagram of a cross section of the protective clothing fabric of the present invention shown in FIG. And FIG. 3 shows the conceptual diagram of the cross section of the spunbond nonwoven fabric layer (A) with which the fabric for protective clothing of the present invention is provided. The fabric for protective clothing 1 of the present invention includes a spunbond nonwoven fabric layer (A) 2 and a melt blown nonwoven fabric layer 3, and these layers are directly laminated. And when oil is dripped from the surface side where the melt blown nonwoven fabric layer of the fabric for protective clothing of the present invention is disposed, the oil repellency of the melt blown nonwoven fabric layer is low and the oil repellency of the spunbond nonwoven fabric layer (A) is high. Therefore, although oil easily penetrates into the meltblown nonwoven fabric layer, penetration into the spunbond nonwoven fabric layer (A) is prevented, so that the oil 4 diffuses widely into the meltblown nonwoven fabric layer 3 as shown in FIG. Become.

  On the other hand, when it has only a spunbond nonwoven fabric layer (A) without having a melt blown nonwoven fabric layer, as shown in FIG. 3, the oil is spunbonded depending on the oil repellency of the spunbond nonwoven fabric layer (A). It will exist in the form of a water droplet on one surface side of the nonwoven fabric layer (A). Here, when the amount of oil adhering to the spunbond nonwoven fabric layer (A) shown in FIG. 3 is the same as the amount of oil adhering to the protective clothing fabric shown in FIG. 2, the oil shown in FIG. While the contact area with the nonwoven fabric layer (A) is small, the oil shown in FIG. 2 is widely diffused in the meltblown layer, so the contact area with the spunbond nonwoven fabric layer (A) of the oil shown in FIG. Is big. Therefore, the force which permeate | transmits the spun bond nonwoven fabric layer (A) of the oil shown in FIG. 2 becomes weak compared with the force which permeate | transmits the spun bond nonwoven fabric layer (A) of the oil shown in FIG. It is presumed that the liquid permeation-suppressing performance of the protective clothing fabric with respect to oil is excellent. On the other hand, only the spunbond nonwoven fabric layer (A) of oil shown in FIG. In addition, as mentioned above, when only the spunbond nonwoven fabric layer (A) shown in FIG. 3 has excellent liquid permeation suppression performance with respect to oil, the average of the fibers constituting the spunbond nonwoven fabric layer (A) It is necessary to reduce the fiber diameter, increase the thickness of the spunbond nonwoven fabric layer (A), and increase the bulk density of the spunbond nonwoven fabric layer (A). In that case, the air permeability of the spunbond nonwoven fabric layer (A) Will drop.

  Moreover, the low oil repellency of the melt blown nonwoven fabric layer 3, which is a nonwoven fabric layer composed of fibers having an average fiber diameter of 3 μm or more and 8 μm or less, provides protection with excellent liquid permeation suppression performance and excellent air permeability. It is important to obtain a dough. Hereinafter, this mechanism will be estimated. The melt blown nonwoven fabric layer 3 is a nonwoven fabric layer having a relatively small mesh opening and excellent air permeability. Therefore, when oil contacts the meltblown nonwoven fabric layer 3, the penetration of the oil into the meltblown nonwoven fabric layer 3 is promoted, and further, the diffusion of the oil into the meltblown nonwoven fabric layer 3 is also promoted ( The thickness of the meltblown nonwoven fabric layer 3 is thin and the area of the meltblown nonwoven fabric layer 3 is large, so that diffusion in the surface direction of the meltblown nonwoven fabric layer 3 is particularly promoted). These are presumed to be promoted by capillary action. And the content mass of the said oil per unit area of the cloth for protective clothing becomes small by the spreading | diffusion inside the said meltblown nonwoven fabric layer 3 of the said oil. As a result, it is estimated that the permeation of the oil spunbond nonwoven fabric layer (A) per unit area of the protective clothing fabric is weakened. Accordingly, the permeation of the oil spunbond nonwoven fabric layer (A) per unit area of the protective clothing fabric is weakened, so that the spunbond nonwoven fabric layer (A) itself has a relatively high oil repellency, even if it is not relatively high. The liquid penetration control performance of the dough is excellent. As described in the description regarding the thickness of the spunbond nonwoven fabric layer (A), the oil repellency of the nonwoven fabric layer and the air permeability of the nonwoven fabric layer are in a trade-off relationship, so that the spunbond nonwoven fabric has a relatively low oil repellency. The air permeability of the layer (A) is superior to the air permeability of the spunbond nonwoven fabric layer (A) having a relatively low oil repellency. As a result, the fabric for protective clothing of the present invention has excellent liquid permeation suppression performance and air permeability.

  The melt blown nonwoven fabric layer composed of fibers having a relatively small average fiber diameter (specifically, an average fiber diameter of 2 μm or less) is a nonwoven fabric layer having an extremely small mesh size, and the oil repellency of the melt blown nonwoven fabric layer described above. Can be expensive. When the melt-blown nonwoven fabric layer has a high oil repellency, the liquid penetration inhibiting performance of the protective clothing fabric is excellent. However, on the other hand, the air permeability of the protective clothing fabric is inferior. Hereinafter, this mechanism will be estimated. Since the melt-blown nonwoven fabric layer has a high oil repellency, the melt-blown nonwoven fabric layer itself has excellent oil repellency, and as a result, the liquid penetration inhibiting performance of the protective clothing fabric is excellent. However, since the oil repellency of the nonwoven fabric layer and the air permeability of the nonwoven fabric layer are in a trade-off relationship, the air permeability of the melt blown nonwoven fabric layer is inferior, and as a result, the air permeability of the protective clothing fabric is inferior. Become.

[Melt blown nonwoven layer]
The form of the melt blown nonwoven fabric layer mainly composed of the polyolefin resin provided in the protective clothing fabric used in the present invention can be obtained by a melt blow method.

  The melt-blowing method is generally a method in which a thermoplastic polymer extruded from a spinneret is thinned into a fiber by spraying with hot air, and a web is formed by utilizing the self-bonding property of the fiber. 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 melt blown nonwoven fabric layer has a polyolefin resin as a main component. By making the melt-blown nonwoven fabric layer a polyolefin-based resin as a main component, since the polyolefin-based resin is oleophilic, oil diffusibility in the melt-blown nonwoven fabric layer is improved. And as a result, the liquid permeation suppression performance with respect to the oil of the cloth for protective clothing is excellent. Of the polyolefin resins, polypropylene is more preferable because the dust collecting performance of the protective clothing fabric is easily improved by electret processing. Here, the melt blown nonwoven fabric layer having the polyolefin resin as a main component means that the melt blown nonwoven fabric layer contains the polyolefin resin in an amount of 80% by mass or more based on the entire melt blown nonwoven fabric layer as described above. Moreover, it is preferable that a melt blown nonwoven fabric layer contains 90 mass% or more of polyolefin resin with respect to the whole melt blown nonwoven fabric layer, and it is more preferable that a melt blown nonwoven fabric layer consists only of polyolefin resin. In addition, when a melt blown nonwoven fabric layer consists only of polyolefin resin, the melt blown nonwoven fabric may contain additives, such as a hindered amine, in the range which does not impair the effect of this invention.

  The average fiber diameter of the fibers constituting the meltblown nonwoven fabric layer is 3 μm or more and 8 μm or less. If the average fiber diameter is 8 μm or less, the amount of voids between fibers in the meltblown nonwoven fabric layer tends to increase, so that a larger amount of oil can be diffused into the meltblown nonwoven fabric layer. The liquid permeation suppression performance with respect to oil becomes more excellent. On the other hand, when the average fiber diameter is 3 μm or more, the air permeability of the melt blown nonwoven fabric layer becomes better, and as a result, the air permeability of the protective clothing fabric becomes better.

  In addition, adjustment of the average fiber diameter of the fiber which comprises a melt blown nonwoven fabric layer can be performed by the conventional technique. Specifically, when producing fibers for use in the meltblown nonwoven fabric layer, the fibers can be thinned by reducing the amount of resin discharged, increasing the discharge speed, and increasing the degree of fiber stretching.

  The thickness of the melt blown nonwoven fabric layer is 100 μm or more and 200 μm or less. When the thickness of the melt blown nonwoven fabric layer is 200 μm or less, it is possible to obtain good air permeability of the protective clothing fabric. On the other hand, when the thickness of the meltblown nonwoven fabric layer is 100 μm or more, a larger amount of oil can be diffused into the meltblown nonwoven fabric layer, and as a result, the liquid penetration suppression performance to the oil of the protective clothing fabric is more excellent It becomes.

The bulk density of the melt blown nonwoven fabric layer is 0.20 g / cm ³ or more and 0.40 g / cm ³ or less. If the bulk density of the melt blown nonwoven fabric layer is 0.40 g / cm ³ or less, it becomes possible to obtain a good air permeability of the fabric for protective clothing, and if it is 0.20 g / cm ³ or more, a larger amount of oil is melt blown. It becomes possible to diffuse in the nonwoven fabric layer, and as a result, the liquid permeation suppression performance of the protective clothing fabric to oil becomes more excellent.

  The fluorine-containing mass of the meltblown nonwoven fabric layer is 100 ppm or less. When the fluorine-containing mass of the meltblown nonwoven fabric layer is 100 ppm or less, the oil easily penetrates into the meltblown nonwoven fabric layer, and as described above, the liquid permeation suppression performance to the oil of the antifouling clothing fabric becomes more excellent. The measurement of the fluorine-containing mass of a melt blown nonwoven fabric layer is performed by AATCC Test Method 189-2007.

  The air permeability and oil absorption performance of the melt blown nonwoven fabric layer are contradictory, and the air permeability decreases when the average fiber diameter of the fibers constituting the melt blown nonwoven fabric layer is thin, the melt blown nonwoven fabric layer is thick, and the bulk density is high. On the other hand, since a large amount of oil can be infiltrated into the melt-blown nonwoven fabric layer, when it is made into a protective clothing fabric, the liquid permeation suppression performance to the oil is excellent, but on the other hand, it has this melt-blown nonwoven fabric layer The air permeability of the protective clothing fabric is reduced. Conversely, when the average fiber diameter of the fibers constituting the meltblown nonwoven fabric layer is thin, the meltblown nonwoven fabric layer is thin, and the bulk density is low, the air permeability is excellent. Since the amount of oil that can be infiltrated into the layer is small, the liquid permeation suppression performance for the oil of the protective clothing fabric having this melt-blown nonwoven fabric layer is inferior. In consideration of these, the present invention has excellent air permeability and liquid permeation suppression performance for oil by making the average fiber diameter of the fibers constituting the meltblown nonwoven fabric layer, the thickness of the meltblown nonwoven fabric layer, and the bulk density within the stated ranges. It is possible to make a protective clothing fabric.

  The meltblown nonwoven fabric is preferably an electret meltblown nonwoven fabric. By using the electret melt blown nonwoven fabric as the melt blown nonwoven fabric, the dust collection performance is improved while ensuring high air permeability of the protective clothing fabric.

  The method for electretizing the melt blown nonwoven fabric layer includes the following methods. A non-conductive fiber sheet is run, and a slit-like suction nozzle is brought into contact with the sheet so as to cross the entire width of the sheet. And the surface of the sheet opposite to the contact portion is brought into contact with the water surface or immersed. In such a state, water is sucked from the suction nozzle. When 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. Further, since 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, the electret nonwoven fabric is uniformly charged with high density on the entire surface of the sheet.

  Moreover, the method by the direct current | flow corona discharge to the sheet | seat of a nonwoven fabric may be used. For example, 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 on the sheet. Is possible.

  The fabric for protective clothing of the present invention further includes a spunbond nonwoven fabric layer (B), and the spunbond nonwoven fabric layer (A), the meltblown nonwoven fabric layer and the spunbond nonwoven fabric layer (B) are preferably laminated in this order. Here, FIG. 4 shows a cross-sectional conceptual diagram of the second embodiment of the protective clothing fabric of the present invention. This protective clothing fabric is composed of the spunbond nonwoven fabric layer (A) 2, the melt blown nonwoven fabric layer 3 and the spunbond nonwoven fabric. Layer (B) 5 is provided in this order. When the protective clothing fabric is used to obtain protective clothing in which the spunbond nonwoven fabric layer (A) is disposed on the wearer side, the spunbond nonwoven fabric layer (B) is disposed further outside the meltblown nonwoven fabric layer. Therefore, the spunbond nonwoven fabric layer (B) can protect the meltblown nonwoven fabric layer from external stress, and the meltblown nonwoven fabric layer is damaged when this fabric for protective clothing is used as protective clothing. Therefore, it is possible to suppress the performance deterioration such as the antifouling performance of the protective clothing, and to improve the wear resistance performance of the protective clothing fabric and the protective clothing.

  The spunbond nonwoven fabric layer (B) may be the same as the spunbond nonwoven fabric layer (A).

  The spunbond nonwoven fabric layer (B) can be given a function as long as the protective clothing fabric does not impair the effects of the present invention. For example, water-repellent, oil-repellent, antistatic, flame retardant, antibacterial and antifungal functions can be imparted to the spunbond nonwoven fabric layer (B).

  The protective clothing using the fabric for protective clothing is protective clothing arranged in the order of the spunbond nonwoven fabric layer (A) and the melt blown nonwoven fabric layer from the inside of the protective clothing (the human body side at the time of clothing). In the protective garment having the above-described configuration, the permeation of oil adhered to the outer surface of the protective garment to the inside of the protective garment can be highly suppressed, and the air permeability can be further improved.

  The method of laminating the spunbond nonwoven fabric layer (A), the melt blown nonwoven fabric layer, the spunbond nonwoven fabric layer (B), etc. of the protective clothing fabric can take a method that does not impair the performance of the present invention. In order to prevent the layer (A) or the melt blown nonwoven fabric from being melted or fused beyond a desired state, ultrasonic bonding, thermal bonding using a hot embossing roll having a pattern height of 1 mm or more, and an adhesive The laminating process by can be used. Among these, in order to uniformly bond the region where the spunbond nonwoven fabric layer (A), the melt blown nonwoven fabric layer, and the spunbond nonwoven fabric layer (B) are bonded, a bonding process using an adhesive is preferable.

  Hereinafter, the present invention will be described in more detail with reference to examples.

[Measuring method]
(1) Thickness The protective clothing fabric was cut on a surface perpendicular to the protective clothing fabric surface using a microtome. The cut surface of the protective clothing fabric thus obtained was photographed at 200 times using a Hitachi field emission scanning electron microscope (FE-SEM) S-800. At this time, the longitudinal direction of the image obtained by photographing was set to be substantially perpendicular to the thickness direction of the protective clothing fabric shown in the image. Here, the SEM image visual field conceptual diagram of the cross section of the cloth for protective clothing is shown in FIG. And the measuring method of the thickness of each layer which comprises fabric for protective clothing is demonstrated using FIG. The SEM image visual field conceptual diagram of FIG. 5 shows the cut surface and background 6 of the protective clothing fabric composed of the spunbond nonwoven fabric layer (A) 2 and the melt blown nonwoven fabric layer 3. First, five dividing lines 7 perpendicular to the longitudinal direction of the SEM image and equally dividing the longitudinal width of the SEM image into 6 were written in the SEM image. And the length of each dividing line which overlaps with the spunbond nonwoven fabric layer (A) 2 (an example of the dividing line overlapping with the spunbond nonwoven fabric layer (A) is indicated by reference numeral 8 in FIG. 5). It was measured. Moreover, the length of each dividing line (an example of the dividing line overlapping with the meltblown nonwoven fabric layer is indicated by reference numeral 9 in FIG. 5) overlapping the meltblown nonwoven fabric layer 3 was also measured. At this time, the length of the dividing line was a value obtained by reading to the first decimal place when the unit of the length of the dividing line was μm and rounding off the first decimal place. The above measurement was performed on 10 SEM images obtained by photographing different portions of the protective clothing fabric. The average value of 50 measured values of the length of the dividing line overlapping with the obtained spunbond nonwoven fabric layer (A) was taken as the thickness of the spunbond nonwoven fabric layer (A). Moreover, the average value of the measured value of the length of the dividing line which overlaps with the obtained melt blown nonwoven fabric layer was made into the thickness of a melt blown nonwoven fabric layer. Here, a portion 10 that looks like a cavity (that is, a portion where no fiber is reflected) is observed at the boundary between the spunbond nonwoven fabric layer (A) and the meltblown nonwoven fabric layer in the SEM image, and the portion that appears to be a cavity and the dividing line are observed. When they overlap, the part that appears to be a cavity is part of the meltblown nonwoven fabric layer, and the length of the dividing line that overlaps the meltblown nonwoven fabric layer and the length of the dividing line that overlaps the spunbond nonwoven fabric layer (A) are measured. did. That is, in the example shown in FIG. 5, what is indicated by reference numeral 12 is the length of the dividing line 7 overlapping the meltblown nonwoven fabric layer 3, and what is indicated by reference numeral 11 is the spunbond nonwoven fabric layer (A) 2. Is the length of the dividing line 7 that overlaps. When the protective clothing fabric further includes a spunbond nonwoven fabric layer (B), the thickness of the spunbond nonwoven fabric layer (B) is the same as the method for measuring the thickness of the spunbond nonwoven fabric layer (A). It measured by the measuring method.

(2) Average fiber diameter For the protective clothing fabric, the cut surface of the protective clothing fabric obtained in the same manner as described in (1) Thickness section was used as a field emission scanning electron microscope (FE-SEM) manufactured by Hitachi, Ltd. Using S-800, images were taken at magnifications of 500 times and 1000 times. Those images were taken into the image analysis software attached to this device. Here, the fiber diameter is measured using a SEM image measured at a magnification of 500 times for fibers having a fiber diameter of less than 10 μm, and the SEM image is measured at a magnification of 1000 times for fibers having a fiber diameter of 10 μm or more. Was used to measure the fiber diameter. Specifically, 15 fibers constituting the spunbond nonwoven fabric layer (A) were randomly selected from the spunbond nonwoven fabric layer (A) shown in the SEM image, and the fiber diameters of these fibers were measured. And the average of 15 obtained measurement values was made into the average fiber diameter of the fiber which comprises a spun bond nonwoven fabric layer (A). Further, 15 fibers constituting the melt blown nonwoven fabric layer were randomly selected from the melt blown nonwoven fabric layer shown in the SEM image, and the fiber diameters of these fibers were measured. And the average of 15 obtained measurement values was made into the average fiber diameter of the fiber which comprises a melt blown nonwoven fabric layer. In addition, the fiber diameter of the fiber was read to the first decimal place when the fiber diameter was in units of μm, and the first decimal place was rounded off. In addition, when the fabric for protective clothing further includes a spunbond nonwoven fabric layer (B), the average fiber diameter of the fibers constituting the spunbond nonwoven fabric layer (B) constitutes the above spunbond nonwoven fabric layer (A). It measured by the measuring method similar to the measuring method of the average fiber diameter of the fiber to do.

(3) Bulk density The bulk density was measured by “GeoPyc1360” manufactured by Micromeritics Japan LLC. Layers other than the specific layer (that is, the spunbond nonwoven fabric layer (A) or the melt blown nonwoven fabric layer) whose bulk density is to be measured were removed from the protective clothing fabric using No. 1000 sandpaper. Next, a specific layer to be measured was cut into a size of 2 mm × 2 mm to obtain a measurement sample. Ten measurement samples were prepared, and measurement beads were alternately stacked on a sample chamber having an inner diameter of 12.7 mm. The beads were filled to a position 2 cm from the bottom of the sample chamber and measured. The third decimal place of the result of the bulk density obtained from the measurement was rounded off to obtain the bulk density of the measurement sample. And the measurement of the bulk density of said measurement sample was performed 3 times. The average value of the three values obtained was taken as the bulk density of the specific layer. The bulk density was measured for each of the spunbond nonwoven fabric layer (A) and the melt blown nonwoven fabric layer.

(4) Fluorine-containing mass The fluorine-containing mass was measured according to the method described in AATCC Test Method 189-2007. Layers other than the specific layer (that is, the spunbond nonwoven fabric layer (A) or the melt blown nonwoven fabric layer) whose fluorine-containing mass is to be measured were removed from the protective clothing fabric using No. 1000 sandpaper. Next, a specific layer to be measured was cut into a size of 2 mm × 2 mm to obtain a measurement sample. Prepare three samples for this measurement, measure the fluorine-containing mass for each sample, and round off the 1's place of the average value of the obtained three fluorine-containing masses. Mass. The fluorine-containing mass was measured for each of the spunbond nonwoven fabric layer (A) and the melt blown nonwoven fabric layer.

(5) Liquid penetration suppression performance with respect to oil The measurement of liquid penetration suppression performance with respect to oil was performed according to the method described in JIS T8034-2008 A method low level contamination. As a test solution, 50 ° C. n-decane or 50 ° C. n-octane was used. The test solution was dropped onto the protective clothing fabric in the direction from the melt blown nonwoven fabric layer of the protective clothing fabric to the spunbonded nonwoven fabric layer (A) of the protective clothing fabric, and the permeability of the protective clothing fabric of the test solution was measured. The transmittance was measured three times for each of 50 ° C. n-decane and 50 ° C. n-octane, and the average value of each transmittance was calculated. Next, about the average of the obtained transmittance | permeability, the liquid penetration | infiltration suppression performance with respect to the oil of the clothing for protective clothing was evaluated using the following references | standards.
A: 0% or more and less than 30% B: 30% or more and less than 60% C: 60% or more and less than 80% D: 80% or more.

(6) Air permeability The air permeability of the protective clothing fabric was measured based on the JIS L1913-2010 Frazier method and the amount of air passing through a test piece having a size of 15 cm x 15 cm. The average value of the obtained three measurements of the amount of air passing through was defined as the air permeability. The case where the obtained air permeability was 60 cm ³ / cm ² / sec or more was regarded as acceptable.

(7) Collection efficiency The collection efficiency was measured with a collection performance measuring device for the protective clothing fabric. In this collection performance measuring apparatus, 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. Moreover, 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. Furthermore, the sample holder includes a pressure gauge, and can read the static pressure difference between the upstream and downstream of the sample.

In measuring the collection performance, a 0.3 μm 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, adjust the air volume with a flow rate 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 ) Measured three times per sample with a particle counter (Lion Co., Ltd., KC-01E) 30 seconds after stabilization, the upstream dust number D and downstream dust number d were obtained. The collection performance (%) was calculated from the average value of three measurements of the number of dusts D and the number of downstream dusts d by the following formula. This operation was performed in the same manner for 10 samples, and the average value of the collection efficiency of 10 samples was calculated.
Collection efficiency (%) = [1- (d / D)] × 100
From the average value of the collection efficiency of the obtained 10 samples, the following was determined as a criterion.
A: 80% or more and B: less than 80%.

(8) Wear resistance performance The wear resistance performance was evaluated by the wear strength described in JIS T8115-2010. In the evaluation, the melt blown nonwoven fabric layer or the spunbond nonwoven fabric layer (B) was used as a wear surface, and the melt blown nonwoven fabric layer was evaluated as a main protective layer described in JIS T8115-2010. The average value of the test results of the three wear strengths of the protective clothing fabric was defined as the wear strength, and the following was determined as a criterion.
A: 1000 times or more and B: less than 1000 times.

  The production of protective clothing fabric was carried out as follows.

<Example 1>
A spunbond nonwoven fabric A1 was obtained using a spunbond nonwoven fabric and an oil repellent agent. In the oil repellent treatment, “Unidyne TG-5601” manufactured by Daikin Industries, Ltd. as the oil repellent and normal hexanol as the penetrant were mixed with pure water according to the formulation A shown in Table 2, followed by dipping and mangle treatment. The spunbond after the mangle treatment was dried at 135 ° C. for 1 minute with a pin tenter.

Using the obtained spunbond nonwoven fabric A1 after the oil-repellent treatment, an adhesive ("Morescomelt TN-367Z" manufactured by Moresco) heated and melted at 150 ° C with a hot melt bonding machine was spunbonded nonwoven fabric. coating weight on a first surface of A1 was coated from a T-die so as to be 2 g / m ² in a spray form. The adhesive applied at this time was dispersed and present in a spot shape on the first surface of the spunbond nonwoven fabric A1. Thereafter, the melt blown nonwoven fabric B1 was bonded to the first surface of the spunbond nonwoven fabric A1. The obtained two-layer laminate product of spunbond nonwoven fabric A1 / meltblown nonwoven fabric B1 was wound up to obtain a protective clothing fabric of Example 1. Table 1 shows the average fiber diameter, thickness, bulk density, constituent fiber material, and the like of the spunbond nonwoven fabric layer (A) constituting the obtained protective clothing fabric. Table 1 shows the average fiber diameter, thickness, bulk density, constituent fiber material, and the like of the meltblown nonwoven fabric layer constituting the obtained protective clothing fabric. Further, Table 3 shows the liquid permeation suppression performance, air permeability, collection efficiency, wear resistance, and the like of the protective clothing fabric obtained in Example 1. In addition, the fluorine-containing mass of the spunbonded nonwoven fabric layer (A) subjected to the water-repellent treatment according to the formulation A was 1500 ppm.

<Examples 2 to 8>
Similarly to Example 1, spunbond nonwoven fabrics A2 to A8 were obtained using a spunbond nonwoven fabric and an oil repellent agent. Furthermore, it was set as the fabric for protective clothing of Examples 2-8 similarly to Example 1 except having used the spunbond nonwoven fabric A1 in any of the spunbond nonwoven fabrics A2-A8. Tables 1 and 3 show the structures of the protective clothing fabrics of Examples 2 to 8 obtained, the liquid permeation suppression performance, the air permeability, the collection efficiency, the wear resistance, and the like.
<Example 9>
A spunbond nonwoven fabric A9 was obtained using a spunbond nonwoven fabric and an oil repellent agent in the same manner except that the oil repellent agent of Example 1 was changed to Formulation B. Furthermore, it was set as the fabric for protective clothing of Example 9 like Example 1 except having changed the spun bond nonwoven fabric A1 into the spun bond nonwoven fabric A9. Tables 1 and 3 show the composition of the protective clothing fabric of Example 9 obtained, the liquid permeation suppression performance, the air permeability, the collection efficiency, the wear resistance, and the like. The content mass of fluorine of the spunbonded nonwoven fabric layer (A) subjected to water repellent treatment according to Formulation B was 600 ppm.
<Examples 10 to 15>
The fabric for protective clothing of Examples 10 to 15 was obtained in the same manner as in Example 1 except that the spunbond nonwoven fabric A1 obtained in Example 1 and the meltblown nonwoven fabric B1 were any of meltblown nonwoven fabrics B2 to B8. Tables 1 and 3 show the structures of the protective clothing fabrics of Examples 10 to 15 obtained, the liquid permeation suppression performance, the air permeability, the collection efficiency, the wear resistance, and the like.

<Example 16>
A fabric for protective clothing of Example 16 was obtained in the same manner as in Example 1 except that the electret meltblown nonwoven fabric C1 obtained by electret processing of the meltblown nonwoven fabric B1 was used. Tables 1 and 3 show the composition of the protective clothing fabric of Example 16, the liquid permeation suppression performance, the air permeability, the collection efficiency, the wear resistance, and the like.

<Example 17>
Using a spunbond nonwoven fabric A17 which is a spunbond nonwoven fabric A1 which has not been subjected to oil repellency treatment, a “molescomelt TN-367Z” manufactured by Moresco, which was heated and melted at 150 ° C. with a hot melt bonding machine, the coating amount on the first surface of the bonded nonwoven fabric A1 was coated from a T-die so as to be 2 g / m ² in a spray form. Thereafter, the two-layer laminate product of the spunbond nonwoven fabric A1 / meltblown nonwoven fabric B1 obtained in Example 1 was bonded to the first surface of the spunbond nonwoven fabric A1 coated with an adhesive. The obtained three-layer laminate of spunbond nonwoven fabric A1 / meltblown nonwoven fabric B1 / spunbond nonwoven fabric A1 was wound up to obtain a protective clothing fabric of Example 17. Tables 1 and 3 show the composition of the protective clothing fabric of Example 17 obtained, the liquid permeation suppression performance, the air permeability, the collection efficiency, the wear resistance, and the like.

<Comparative Examples 1-6>
Similarly to Example 1, spunbond nonwoven fabrics A10 to A15 were obtained using a spunbond nonwoven fabric and an oil repellent agent. Furthermore, it was set as the cloth for protective clothing of Comparative Examples 1-7 similarly to Example 1 except having used the spunbond nonwoven fabric A1 in any of the spunbond nonwoven fabrics A10-A15. Tables 1 and 4 show the configurations of the protective clothing fabrics of Comparative Examples 1 to 6, the liquid permeation suppression performance, the air permeability, the collection efficiency, the wear resistance, and the like.

<Comparative Example 7>
Spunbond nonwoven fabric A16 was obtained using the spunbond nonwoven fabric and the oil repellent agent except that the oil repellent agent of Example 1 was changed to Formulation C. Furthermore, it was set as the fabric for protective clothing of the comparative example 7 like Example 1 except having changed the spun bond nonwoven fabric A1 into the spun bond nonwoven fabric A16. Tables 1 and 4 show the structure of the protective clothing fabric of Comparative Example 7 obtained, the liquid permeation suppression performance, the air permeability, the collection efficiency, the wear resistance, and the like. The content mass of fluorine of the spunbonded nonwoven fabric layer (A) subjected to the water repellent treatment according to the formulation C was 400 ppm.

<Comparative Examples 8-13>
A fabric for protective clothing of Comparative Examples 8 to 12 was prepared in the same manner as in Example 1 except that the spunbond A1 obtained in Example 1 and the meltblown nonwoven fabric B1 were any of meltblown nonwoven fabrics B8 to B13. Tables 1 and 4 show the structures of the protective clothing fabrics of Comparative Examples 8 to 13, the liquid permeation suppression performance, the air permeability, the collection efficiency, the wear resistance, and the like.

<Comparative example 14>
The oil-repellent agent of Example 1 was used as formulation D, and a melt-blown nonwoven fabric B14 was obtained using a melt-blown nonwoven fabric and an oil-repellent agent. Further, a protective clothing fabric of Comparative Example 14 was prepared in the same manner as in Example 1 except that the melt blown nonwoven fabric B1 was changed to the melt blown nonwoven fabric B14. Tables 1 and 4 show the composition of the protective clothing fabric of Comparative Example 14 obtained, the liquid permeation suppression performance, the air permeability, the collection efficiency, the wear resistance, and the like. The content mass of fluorine in the melt blown nonwoven fabric layer subjected to the water repellent treatment according to Formulation D was 250 ppm.

<Comparative Example 15>
Using the spunbond nonwoven fabric A17 obtained in Example 17, the “Morescomelt TN-367Z” manufactured by Moresco, which was heated to 150 ° C. and melted with a hot melt bonding machine, was the first spunbond nonwoven fabric A17. The surface was coated in a spray form from a T die so that the coating amount was 2 g / m ² . Thereafter, the two-layer laminate product of the spunbond nonwoven fabric A1 / meltblown nonwoven fabric B14 obtained in Comparative Example 14 was bonded to the first surface of the spunbond nonwoven fabric A17 coated with an adhesive. The obtained three-layer laminate of spunbond nonwoven fabric A1 / melt blown nonwoven fabric B14 / spunbond nonwoven fabric A17 was wound up to obtain a protective clothing fabric of Comparative Example 15. Tables 1 and 4 show the structure of the protective clothing fabric of Comparative Example 15 obtained, the liquid permeation suppression performance, the air permeability, the collection efficiency, the wear resistance, and the like.

<Comparative Example 16>
A three-layer laminate of spunbond nonwoven fabric A1 / meltblown nonwoven fabric B15 / spunbond nonwoven fabric A17 obtained in the same manner as in Comparative Example 15 except that the meltblown nonwoven fabric B14 was changed to a meltblown nonwoven fabric B15, and the protective clothing fabric of Comparative Example 16 was wound. It was. Tables 1 and 4 show the composition of the protective clothing fabric of Comparative Example 16 obtained, the liquid permeation suppression performance, the air permeability, the collection efficiency, the wear resistance, and the like.

Protective clothing using the fabric for protective clothing of the present invention is useful for wearing in an environment where the temperature is high and contamination due to adhesion of oil is a concern.

1: Protective clothing fabric 2: Spunbond nonwoven fabric layer (A)
3: Melt blown nonwoven fabric layer 4: Oil 5: Spunbond nonwoven fabric layer (B)
6: Background 7: Dividing line 8: Length of dividing line overlapping with the spunbond nonwoven fabric layer (A) 9: Length of dividing line overlapping with the melt blown nonwoven fabric layer 10: Site appearing as a cavity 11: Spunbond nonwoven fabric Length of parting line overlapping layer (A) 12: Length of parting line overlapping meltblown nonwoven fabric layer

Claims (5)

A fabric for protective clothing having at least a spunbond nonwoven fabric layer (A) and a meltblown nonwoven fabric layer mainly composed of an olefin resin,
The spunbond nonwoven fabric layer (A) and the meltblown nonwoven fabric layer are directly laminated,
The spunbond nonwoven fabric layer (A) is composed of fibers having an average fiber diameter of 18 μm to 30 μm, a thickness of 150 μm to 300 μm, and a bulk density of 0.20 g / cm ^{3 to} 0.40 g / cm. ³ or less, and the content mass of fluorine in the spunbonded nonwoven fabric layer (A) is 500 ppm or more with respect to the whole spunbonded nonwoven fabric layer (A),
The melt blown nonwoven fabric layer is composed of fibers having an average fiber diameter of 3 μm to 8 μm, a thickness of 100 μm to 200 μm, and a bulk density of 0.20 g / cm ^{3 to} 0.40 g / cm ³ . Furthermore, the cloth for protective clothing whose content mass of the fluorine in the said melt blown nonwoven fabric layer is 100 ppm or less with respect to the whole said melt blown nonwoven fabric layer. The fabric for protective clothing of Claim 1 in which the said spunbond nonwoven fabric layer (A) contains the compound which has a C1-C6 perfluoroalkyl group. 3. The protective clothing fabric according to claim 1, wherein the melt blown nonwoven fabric is an electret melt blown nonwoven fabric. The spunbond nonwoven fabric layer (B) is further provided, and the spunbond nonwoven fabric layer (A), the meltblown nonwoven fabric layer, and the spunbond nonwoven fabric layer (B) are laminated in this order. Fabric for protective clothing. It is protective clothing using the cloth for protective clothing according to any one of claims 1 to 4, and is arranged in order of said spunbonded nonwoven fabric layer (A) and said melt blown nonwoven fabric layer from the inside of said protective clothing. Protective clothing characterized by that.

Images