WO2017119355A1

WO2017119355A1 - Protective clothing

Info

Publication number: WO2017119355A1
Application number: PCT/JP2016/088840
Authority: WO
Inventors: 大森　平; 林　祐一郎; 猛利中村
Original assignee: 東レ株式会社
Priority date: 2016-01-06
Filing date: 2016-12-27
Publication date: 2017-07-13
Also published as: JPWO2017119355A1; CN208972693U

Abstract

The present invention provides protective clothing having a plurality of fabrics which are affixed to each other by fusing, wherein the protective clothing has superior virus barrier properties and blood barrier properties at fused parts of these fabrics. The present invention relates to protective clothing provided with at least two functional sheets, wherein: the functional sheets comprise laminates wherein a moisture permeable film and a fiber layer are laminated; part of a functional sheet (2), one of the two functional sheets, forms a laminated part (4) with part of a functional sheet (3), the other of the two functional sheets; the laminated part (4) has a fused part (5) continuing from one end part thereof to the other end part thereof; and the virus barrier properties of the fused part (5) are class 4 or greater, and the blood barrier properties of the fused part are class 4 or greater.

Description

Protective clothing

The present invention relates to protective clothing.

Some protective products have various forms and functions depending on their purpose and application. In particular, protective products with excellent performance aimed at protecting against harmful substances that may adversely affect the human body, such as blood barrier properties, virus barrier properties, and liquid resistance, generally have poor moisture permeability. However, the inside of the protective product becomes highly humid due to sweating and the like generated from the body, and improvement of clothing comfort such as a feeling of heat and a feeling of stuffiness has been an issue.

Patent Document 1 discloses protective clothing composed of a plurality of fabrics, and further discloses that these fabrics are sewn with yarn having a hydrophobic function.

Patent Document 2 discloses a protective garment composed of a fabric including a plurality of functional liquid-proof layers, and further, these fabrics are fused discontinuously by ultrasonic heat welding to form a fused portion. It is disclosed that the fusion part and its peripheral part are reinforced with a reinforcing material to form a fusion part. That is, Patent Document 2 discloses that a fusion part between fabrics is a liquid-proof stitchless seam.

Japanese National Table 2014-500408 Japan Special Table 2010-500933

Here, in the protective garment disclosed in Patent Document 1, there is a problem that the barrier property at the sewing portion is lowered because the plurality of fabrics constituting the protective garment are sewn by the yarn.

Further, in the protective garment disclosed in Patent Document 2, the fusion part of the plurality of fabrics constituting the protective garment is reinforced by the reinforcing material, but the fusion part is welded by ultrasonic heat welding in the fusion part. Since the part is formed discontinuously, there is a problem that the barrier property at the fused part of the protective clothing is lowered.

Therefore, in the present invention, the protective clothing has a plurality of fabrics, and these fabrics are fixed to each other by fusion, and the virus barrier property at a site including at least a part of the fusion part of these fabrics and It is an object to provide protective clothing excellent in blood barrier properties.

In order to solve the problems, the present invention is as follows.
(1) A protective garment comprising at least two functional sheets, wherein the two functional sheets each have a laminate in which a moisture permeable film and a fiber layer are laminated, In the functional sheet, a part of one functional sheet and a part of the other functional sheet of the two functional sheets are overlapped to form a laminated part, and the laminated part is in the laminated part. The part of the protective clothing having a fusion part continuous from one end part to the other end part and including at least a part of the fusion part has a virus barrier property of class 4 or more and a blood barrier property. Class 4 or higher protective clothing,
(2) The protective clothing according to (1), wherein at least one of the two functional sheets has a plurality of moisture permeable films,
(3) At least one of the two functional sheets has a plurality of fiber layers, and at least two of the fiber layers have outermost layers on both sides of the functional sheet having a plurality of fiber layers. The protective clothing according to (1) or (2),
(4) The protective clothing according to any one of (1) to (3), wherein a waterproof protective layer is laminated on at least a part of the fusion part,
(5) There are a plurality of the fusion parts, and these fusion parts meander from one end part to the other end part in the laminated portion, and the fusion parts intersect with each other at a plurality of places. The protective clothing according to any one of 1) to (4).

According to the present invention, there is a protective garment having a plurality of fabrics, and these fabrics are fixed to each other by fusion, and the virus barrier property at a site including at least a part of the fusion part of these fabrics and Protective clothing with excellent blood barrier properties can be obtained.

FIG. 1: shows the conceptual diagram of the one part area | region containing the melt | fusion part in one example of the protective clothing of this invention. FIG. 2 shows one conceptual diagram of a form example of a continuous fused part. FIG. 3 shows one conceptual diagram of a form example of a continuous fused part. FIG. 4 shows one conceptual diagram of a form example of a continuous fused part. FIG. 5 shows one conceptual diagram of a form example of a continuous fused part. FIG. 6 shows a photograph of a part of the fused portion of the protective clothing of Example 1. FIG. 7 shows a photograph of a part of the fused part of the protective clothing of Example 4. FIG. 8 shows a photograph of a part of the fused part of the protective clothing of Example 5. FIG. 9 shows a photograph of a part of the fused part of the protective clothing of Example 3. FIG. 10 shows a photograph of a part of the fused portion of the protective clothing of Example 6. FIG. 11 shows a photograph of a part of the fused part of the protective clothing of Examples 2 and 7. FIG. 12 shows a photograph of a part of the fused part of the protective clothing of Comparative Example 2.

The protective clothing of the present invention includes at least two functional sheets, each of the two functional sheets having a laminate in which a moisture permeable film and a fiber layer are laminated, and the two functional sheets. A part of one functional sheet of the sheet and a part of the other functional sheet of the two functional sheets are overlapped to form a laminated part, and the laminated part is one of the laminated parts. The part of the protective clothing having a fusion part continuous from one end part to the other end part and including at least a part of the fusion part has a virus barrier property of class 4 or higher and a blood barrier property of class 4 It is the above.

Here, the protective garment of the present invention includes a functional sheet, and the functional sheet has a laminated body in which a moisture permeable film and a fiber layer are laminated.

The above-mentioned moisture-permeable film is not particularly limited as long as it is a film having virus barrier properties, blood barrier properties, and moisture permeability. From the viewpoint that the functional sheet can be provided with excellent virus barrier properties, blood barrier properties, moisture permeability, puncture strength, tensile strength, and water pressure resistance, the moisture permeable film used in the present invention is both surfaces of the film. A porous film having a large number of fine through-holes penetrating the film and imparting air permeability to the film is preferable.

The resin constituting the porous film may be any of polyolefin resin, polycarbonate, polyamide, polyimide, polyamideimide, aromatic polyamide, and fluorine resin, for example. Of these, polyolefin resins are preferred from the viewpoints of heat resistance, moldability, reduction in production cost, chemical resistance, oxidation resistance and reduction resistance.

Examples of the monomer component constituting the polyolefin resin include ethylene, propylene, 1-butene, 1-pentene, 3-methylpentene-1, 3-methyl-1-butene, 1-hexene, 4-methyl- 1-pentene, 5-ethyl-1-hexene, 1-heptene, 1-octene, 1-decene, 1-dodecene, 1-tetradecene, 1-hexadecene, 1-heptadecene, 1-octadecene, 1-eicosene, vinylcyclohexene , Styrene, allylbenzene, cyclopentene, norbornene, and compounds having a carbon-carbon double bond such as 5-methyl-2-norbornene.

Examples thereof include homopolymers of the above monomer components, copolymers composed of at least two selected from the group consisting of the above monomer components, and compositions obtained by blending these homopolymers and copolymers. However, it is not limited to these.

In addition to the above monomer components, for example, vinyl alcohol and maleic anhydride may be copolymerized and / or graft polymerized, but are not limited thereto.

The resin constituting the porous film is preferably polyethylene using ethylene as a monomer component and / or polypropylene using propylene as a monomer component. In particular, polypropylene using propylene as a monomer component is preferable from the viewpoint of heat resistance, gas permeability, porosity, and the like, and it is preferable that polypropylene is a main component of a resin constituting the porous film.

In the present invention, the “main component” means that the proportion of a specific component in all components is 50% by mass or more, more preferably 80% by mass or more, further preferably 90% by mass or more, and most preferably Means 95% by mass or more.

As a method for forming the through-hole in the porous film, either a wet method or a dry method may be used.

Next, the above fiber layer gives the functional sheet sufficient puncture strength, tensile strength, water pressure resistance, and the like. Examples of the shape of the fabric used as the fiber layer include fiber structures such as woven fabrics, knitted fabrics, nonwoven fabrics, and paper.

Among these, non-woven fabrics are preferable from the viewpoints of cost, tensile strength, and the like. Examples of the nonwoven fabric include a wet nonwoven fabric, a resin bond dry nonwoven fabric, a thermal bond dry nonwoven fabric, a spunbond dry nonwoven fabric, a needle punch dry fabric, a water jet punch dry nonwoven paper fabric, and a flash spinning dry nonwoven fabric. In addition, a non-woven fabric produced by a paper making method capable of making the basis weight and thickness uniform can also be preferably used. Of these, a spunbonded dry nonwoven fabric is preferable from the viewpoints of cost, tensile strength, and the like.

Examples of the material of the fiber layer include polyethylene such as polyolefin such as polyethylene and polypropylene, polyethylene terephthalate, polyester such as polylactic acid, polycarbonate, polystyrene, polyphenylene sulfite, fluororesin, and a mixture thereof. Further, the form of the fiber using a mixture of two or more components may be a fiber using a copolymer of two or more resins, or a mixed fiber in which fibers composed of a plurality of single components exist as a nonwoven fabric. Alternatively, a single fiber may have a plurality of components such as a core-sheath type, a sea-island type, or a side-by-side type.

The two functional sheets each have a laminate in which a moisture permeable film and a fiber layer are laminated. It is preferable that the moisture-permeable film and the fiber layer are partially joined.

As a method of partially joining the moisture permeable film and the fiber layer, for example, pressing with a concavo-convex-rolled roll and a pair of rolls, and applying heat to these rolls with heat, ultrasonic waves, or high frequency, and partial adhesion Embossing, spraying powder with low melting point adhesive components, heat treatment, partial bonding, spraying hot melt adhesive, etc., partially permeable film and fiber layer Examples include hot-melt processing for bonding. In addition, it is not preferable to apply an adhesive or the like to the entire surface of the moisture-permeable film or fiber layer by coating or the like and to laminate the moisture-permeable property.

Moreover, although the protective clothing of the present invention has at least two functional sheets, these functional sheets may be the same or different.

Here, FIG. 1 shows a conceptual diagram of a part of the region including the fused portion in one embodiment of the protective clothing of the present invention. The partial region 1 of this protective clothing has two functional sheets (one functional sheet 2 of the two functional sheets and the other functional sheet 3 of the two functional sheets). Furthermore, it has the lamination | stacking part 4 in which said 2 functional sheet | seat is piled up and formed. Further, in the laminated portion 4, a continuous fused portion 5 is formed from one end portion of the laminated portion to the other end portion.

In addition, it is important that the protective garment of the present invention has a fusion part that is continuous from one end to the other end of the laminated part. As described above, since the fixing means in the fixing portion of the two functional sheets is a needle hole in the sewing process using a sewing thread or the like, liquid or the like from the needle hole is exposed from one surface of the protective clothing. There is a tendency that liquid or the like permeates the other surface.

Even if the means for fixing the fixing portions of the two functional sheets is by fusion, if the fusion portion is discontinuous, the fusion portion and the fusion portion are fused. There is a tendency that liquid or the like enters from the non-fused part between the worn parts and penetrates from one side of the protective clothing to the other side.

However, in the case of the continuous fusion part as described above, the penetration of liquid or the like from one surface of the protective clothing to the other surface can be significantly suppressed. Further, the method for forming the continuous fusion part is not particularly limited, and examples thereof include fusion methods such as heat, ultrasonic waves, and high frequencies. Among them, the fusion by ultrasonic waves can minimize the damage to the fusion part and the functional sheet around the fusion part without diffusing energy other than the fusion part. preferable.

In the protective garment of the present invention, the difference between the melting point of at least a part of the resin constituting the moisture-permeable film of the functional sheet and the melting point of at least a part of the resin constituting the fiber layer is preferably 20 ° C. or less.

That is, as described above, since the protective garment of the present invention has a continuous fused portion, it is necessary to firmly bond the moisture permeable film and the fiber layer constituting each functional sheet. However, on the other hand, it is necessary to minimize the damage to the moisture permeable film and the fiber layer by the energy at the time of fusing. Here, if the difference between the melting point of at least part of the resin constituting the moisture-permeable film of the functional sheet and the melting point of at least part of the resin constituting the fiber layer is 20 ° C. or less, the two functional sheets Each layer can be fused together, and the fused part can exhibit desired performance such as excellent barrier properties due to strong adhesive force, and damage to the moisture permeable film and fiber layer Can be suppressed.

More preferably, the difference between the melting points of the two resins is 15 ° C. or less, more preferably the difference between the melting points of the two resins is 5 ° C. or less, and particularly preferably, the same resin is used.

Further, the content of the resin having a difference in melting point of 20 ° C. or less between the moisture-permeable film and the fiber layer is preferably 10% by mass or more when the total of each layer is 100% by mass. By setting it as 10 mass% or more, each layer can fully be melt | fused and peeling and penetration | invasion of a liquid, etc. between each layer can be suppressed.

The difference between the melting point of at least a part of the resin constituting the moisture permeable film of the functional sheet and the melting point of at least a part of the resin constituting the fiber layer is that the moisture permeable film and the fiber layer each include a plurality of resins. In the case of containing, the difference in melting point between the resin contained in the moisture-permeable film and the resin contained in the fiber layer is the closest.

Here, it is important that the part of the protective clothing of the present invention including at least a part of the fused part has a virus barrier property of class 4 or higher and a blood barrier property of class 4 or higher.

Virus barrier property is an index indicating barrier property in protective clothing, and test pressures passed by the D method defined by JIS T8061 (2010) are classified by bacteriophage penetration resistance of JIS T8122 (2007).

The virus barrier property of the part of the protective clothing of the present invention including at least a part of the fused part needs to be class 4 or higher. If it is less than class 4 of the part of the protective clothing of the present invention including at least a part of the fused part, the virus barrier property of the protective clothing becomes insufficient, and viruses and bacteria tend to penetrate from the fused part. More preferably, the virus barrier property is class 5 or higher, and further preferably class 6 or higher.

Next, the blood barrier property is an index indicating the barrier property of the protective clothing, and the test pressure passed by the D method defined by JIS T8060 (2007) is classified by the artificial blood permeability resistance of JIS T8122 (2007). . The blood barrier property of the part of the protective clothing of the present invention including at least a part of the fused part needs to be class 4 or higher. If it is less than class 4 of the part of the protective clothing of the present invention including at least a part of the fusion part, the blood barrier property of the protective clothing becomes insufficient, and blood penetrates from the fusion part during medical treatment such as surgery. Tend. More preferably, the blood barrier property is class 5 or higher, and further preferably class 6 or higher.

The virus barrier property and blood barrier property of the protective clothing part of the present invention including at least a part of the fused part are the type of moisture permeable film used for the functional sheet, the number of moisture permeable films used for the functional sheet, It can be made desirable by appropriately adjusting the method for forming the bonding portion, the fusing conditions for forming the fusing portion, alone or in combination. For example, by using the functional sheet used in the example, and forming a continuous fused part from one end part of the laminated part of the functional sheet to the other end part as in the example, The virus barrier property and blood barrier property of the part of the protective clothing of the present invention including at least a part can both be class 4 or higher.

Next, the moisture permeability of the part of the protective clothing of the present invention including at least a part of the fused part is preferably 150 g / m ² / hr or more, more preferably in the JIS L1099 (2012) A-1 method. It is 200 g / m ² / hr or more, and more preferably 280 g / m ² / hr or more. When the moisture permeability is 150 g / m ² / hr or more, the humidity in the protective clothing generated by perspiration during wearing can be released to a higher degree, and the comfort during wearing is improved.

The moisture permeability of the part of the protective clothing of the present invention including at least a part of the fused part is the type of moisture permeable film used for the functional sheet, the number of moisture permeable films used for the functional sheet, and the fused part. It can be made desirable by appropriately adjusting the method, the fusing conditions at the time of forming the fusing portion, alone or in combination.

Further, the puncture strength of the functional sheet is preferably 5N or more, more preferably 10N or more, and further preferably 15N or more in JIS T8051 (2005). By setting it to 5 N or more, even when a sharp protrusion comes into contact with the protective clothing during use of the protective clothing using the functional sheet, it is possible to suppress the protective clothing from tearing.

The tensile strength of the functional sheet is preferably 30 N / 50 mm or more in the strip method defined in JIS L1096 (2010) Annex J. More preferably, it is 80 N / 50 mm or more, More preferably, it is 150 N / 50 mm or more.

The puncture strength and tensile strength of the functional sheet are used for the type of moisture permeable film used for the functional sheet, the number of moisture permeable films used for the functional sheet, the type of fiber layer used for the functional sheet, and the functional sheet. It can be made desirable by appropriately adjusting the number of fiber layers, the form of adhesion between the moisture-permeable film and the fiber layer in the functional sheet, alone or in combination.

In addition, the tensile strength of the part of the protective clothing of the present invention including at least a part of the fusion part is preferably 10 N or more in JIS L1093 (2005) grab method. More preferably, it is 20N or more, More preferably, it is 50N or more. By setting it as 10 N or more, it is suppressed that a fusion | fusion part tears during wearing of protective clothing.

The tensile strength of the part of the protective clothing of the present invention including at least a part of the fused part is the type of moisture permeable film used for the functional sheet, the number of moisture permeable films used for the functional sheet, and the fused part. It is possible to obtain a desired one by appropriately adjusting a method for performing the process, a fusing condition at the time of forming the fused part, or a combination thereof.

The water pressure resistance of the functional sheet is preferably 20 kPa or more in JIS L1099 (2009) water resistance test method A or method B. More preferably, it is 50 kPa or more, More preferably, it is 100 kPa or more. Further, the water pressure resistance is preferably 10 kPa or more in the same method as described above. More preferably, it is 20 kPa or more, More preferably, it is 50 kPa or more.

The water pressure resistance of the functional sheet is the type of moisture permeable film used for the functional sheet, the number of moisture permeable films used for the functional sheet, the type of fiber layer used for the functional sheet, and the number of fiber layers used for the functional sheet. The desired form can be obtained by appropriately adjusting the form of adhesion between the moisture-permeable film and the fiber layer in the functional sheet alone or in combination.

In addition, regarding the water pressure resistance of the part of the protective garment of the present invention including at least a part of the fused part, the water pressure of the fused part of the protective garment is generally the water pressure of the part other than the fused part of the protective garment. Low compared. Therefore, when the water pressure resistance of the part of the protective clothing of the present invention including at least a part of the fused portion is 10 kPa or more, the liquid can be prevented from penetrating from the fused portion, and the barrier property as protective clothing is also provided. It is preferable because it will improve further.

The water pressure resistance of the part of the protective clothing of the present invention including at least a part of the fusion part is the type of moisture permeable film used for the functional sheet, the number of moisture permeable films used for the functional sheet, and the fusion part. It can be made desirable by appropriately adjusting the method and the fusing conditions at the time of forming the fusing part alone or in combination.

The thickness of the functional sheet is preferably in the range of 0.1 to 1.5 mm. As a lower limit, More preferably, it is 0.2 mm or more, More preferably, it is 0.3 mm or more. Moreover, as an upper limit, More preferably, it is 1.0 mm or less, More preferably, it is 0.8 mm or less.

For the thickness of the functional sheet, for example, a dial gauge thickness gauge (JIS B7503 (1997), PURICOCK UPRIGH DIAL GAUGE (0.001 × 2 mm), No. 25, measuring element 10 mmφ flat type, 50 gf load) is used. Can be measured.

When the thickness is 0.1 mm or more, it is resistant to friction such as rubbing, and the occurrence of tearing during use can be suppressed. On the other hand, when the thickness is 1.5 mm or less, the weight of the functional sheet is reduced and the weight of the protective clothing is reduced, and the workability when the protective clothing is worn is improved.

It is preferable that at least one of the two functional sheets provided in the protective clothing of the present invention has a plurality of moisture permeable films. In the functional sheet having a plurality of moisture permeable films, the barrier property is dramatically improved. The mechanism is unknown, but in the functional sheet having a plurality of moisture permeable films, the liquid from one outermost surface of the functional sheet permeates the moisture permeable film disposed on the outermost surface side. However, since the permeated liquid diffuses between the two moisture permeable films and is stored there, it is greatly possible that the liquid etc. permeate the moisture permeable film disposed farther from the outermost surface. Presumably because it is suppressed.

Further, at least one of the two functional sheets provided in the protective clothing of the present invention has a plurality of fiber layers, and at least two of these fiber layers have a plurality of fiber layers. It is preferable that they are respectively disposed on the outermost layers on both sides.

Protective clothing by placing a non-woven fabric on the inner side that comes into contact with the skin can reduce the feeling of stuffiness caused by perspiration during use and the discomfort caused by contact between the moisture-permeable film and the skin. Moreover, the role which protects the moisture-permeable film which a functional sheet | seat has from a friction etc. at the time of use can be taken by arrange | positioning a nonwoven fabric in the surface which becomes the outer side of protective clothing.

It is preferable that a waterproof protective layer is laminated on at least a part of the fused portion. This is because the fused portion is a portion where the strength and barrier properties tend to be inferior, and therefore, the occurrence of cracks in the fused portion is prevented and the integrity of the fused portion is maintained. Examples of the waterproof protective tape include a tape having a hot melt adhesive on a fabric or film tape.

As a method for producing the waterproof protective layer, for example, a nozzle is used to apply a hot air current to heat the adhesive and heat it. Next, the functional sheet and the tape are firmly bonded together by pressing the adhesive melted by the pair of pressure rolls on the fusion part along the fusion part of the tape and the functional sheet. The surface to which the protective tape is applied is preferably attached to at least one side of the functional sheet.

The form and number of the fusion parts provided in the laminated part are not particularly limited, and a linear and broken line fusion part is provided between two linear and continuous fusion parts as shown in FIG. 2 may be provided, or only one thick linear and continuous fusion part as shown in FIG. 2 may be provided, or two linear and continuous fusion parts as shown in FIG. 3 may be provided. Also good.

In addition, there are a plurality of fusion portions, and these fusion portions meander from one end portion to the other end portion of the laminated portion, and the fusion portions intersect each other at a plurality of locations. Can be mentioned. By setting it as such a form, it is preferable from a viewpoint which can make a melt | fusion part excellent in tensile strength and water pressure resistance. As such a fused part, what is shown in FIG.4 and FIG.5 can be illustrated.

The details of the mechanism that makes the fused part excellent in tensile strength and water pressure resistance by using such a form is unknown, but is presumed as follows. That is, when a certain stress is applied to the fused part and the form of the fused part is as shown in FIGS. 4 and 5, the form of the fused part is shown in FIGS. It is assumed that this is because the stress applied to the fused portion is dispersed as compared with the case shown in FIG.

Also, the fused part is harder than other sheet parts because the thermoplastic component is melted by high energy such as heat, ultrasonic waves, and high frequency, and the texture tends to deteriorate. In order to improve the texture, it is preferable to narrow the line of one fusion part to a width of 3 mm or less.

As described above, when the line width of the fused part is narrowed, the texture of the protective clothing becomes better. However, on the other hand, when the line width of the fusion part is narrowed, the tensile strength and the water pressure resistance of the fusion part tend to be reduced. However, since the form of the fused part is as shown in FIGS. 4 and 5, the line of the fused part is compared with the case where the form of the fused part is as shown in FIGS. The decrease in the tensile strength of the fused part and the water pressure resistance due to the narrowing of the width can be suppressed. That is, the form of the fused part is as shown in FIG. 4 and FIG. 5, so that the tensile strength of the fused part, the water pressure resistance, and the texture of the protective clothing can be made compatible at a high level. .

Hereinafter, the present invention will be further described with reference to examples, but the present invention is not limited to the following examples.

[Measuring method]
(1) Virus barrier property of the part of the protective clothing including at least a part of the fused part The test pressure passed by the method D defined by JIS T8061 (2010) was classified by the bacteriophage penetration resistance of JIS T8122 (2007). . In addition, the virus barrier property of the site | part of the protective clothing including at least one part of the sewing part which the protective clothing of the comparative example 2 has was also measured by this method.

(2) Blood barrier property of the part of the protective clothing including at least a part of the fusion part The test pressure passed by the method D defined by JIS T8060 (2007) was classified by artificial blood penetration resistance of JIS T8122 (2007). . In addition, the blood barrier property of the site | part of the protective clothing including at least one part of the sewing part which the protective clothing of the comparative example 2 has was also measured by this method.

(3) Moisture permeability of the part of the protective clothing including at least a part of the fused part Measured based on the JIS L1099 (2012) A-1 method, and expressed in g / m ² / hr. In addition, the moisture permeability of the site | part of the protective clothing including at least one part of the sewing part which the protective clothing of the comparative example 2 has was also measured by this method.

(4) Puncture strength Measured based on JIS T8051 (2005).

(5) Tensile strength It measured based on the strip method prescribed | regulated by JISL1096 (2010) appendix J, and the unit was represented by N / 50mm.

(6) Tensile strength of the part of the protective clothing including at least a part of the fused part was measured based on the JIS L1093 (2005) grab method. In addition, the tensile strength of the site | part of the protective clothing including at least one part of the sewing part which the protective clothing of the comparative example 2 has was also measured by this method.

(7) Water pressure resistance, and water pressure resistance of the part of the protective clothing including at least a part of the fused portion Measured based on method A of JIS L1099 (2009) water resistance test. In addition, when water pressure resistance exceeded 100 kPa, it measured by B method. Further, the water pressure resistance was measured based on a method A of JIS L1099 (2009) water resistance test, in which a sample was prepared so that at least a part of the fused portion was at the center of the measurement sample. In addition, when water pressure resistance exceeded 100 kPa, it measured by B method. In addition, the water pressure resistance of the part of the protective clothing including at least a part of the sewing portion of the protective clothing of Comparative Example 2 was also measured by this method.

(8) Thickness Measure the thickness using a dial gauge thickness gauge (JIS B7503 (1997), PEACOCK UPRIGHT DIAL GAUGE (0.001 × 2 mm), No. 25, probe 10 mmφ flat, 50 gf load). did.

(9) Rate of change in water pressure resistance after practical use Procedure C of the practical performance test of JIS T8115 (2010) Annex A is performed on the ground soil, and the water pressure resistance of the right and left knees is measured in the same manner as in (7) above. The rate of change was divided by the water pressure resistance of the unused knees. The ground soil hardness was 50 to 100 LB in the Procter Needle penetration test.

(10) Wearability In an environment of 30 ° C x 80%, wear protective clothing, continue walking for 10 workers for 30 minutes, and find the average of 10 people wearing feeling after 30 minutes. Judgment was made according to the following index.
I do not feel the feeling of heat and stuffiness. ... A
Feel the heat and stuffiness.・・・・・・・ B
I feel a great sense of heat and stuffiness. .... C

[Example 1]
^Two polypropylene spunbond nonwoven fabrics ((weight per unit of 30 g / m ² , thickness 0.2 mm) (polypropylene melting point: 168 ° C.)) and moisture permeable film (polyethylene microporous film (thickness 12 μm, average flow pore size 33 nm) ) (Melting point of polyethylene: 120 ° C.)), the outer layer of the protective clothing is arranged so as to be non-woven fabric / breathable film / non-woven fabric, and the adhesion between each layer is a synthetic rubber system mainly composed of SBR. The hot melt adhesive was adjusted to 1.5 g / m ² between each layer, applied in a spray form, and functionalities of virus barrier property class 4, blood barrier property class 4, moisture permeability 380 g / m ² / hr A sheet was obtained. After that, in order to form a protective clothing, cut out to a predetermined shape, a laminated portion of a plurality of cut out functional sheets is formed into a form having a fusion part that is continuous with ultrasonic waves, and a protective garment with a hood is obtained. It was. The shape of the continuous fusion part which the protective clothing of this embodiment has is the same as that shown in the conceptual diagram of FIG. 1, and the photograph shown in FIG. 6 is the continuous fusion portion which the protective clothing of this embodiment has. It shows a part of. That is, the continuous fusion | melting part which the protective clothing of a present Example has is a thing by which the continuous fusion | melting part as shown in FIG. 6 was provided continuously from one edge part of the laminated body to the other edge part. there were.

[Example 2]
A spunbonded nonwoven fabric (weight per unit area: 30 g / m ² , thickness: 0.2 mm) made of polypropylene (core, melting point of polypropylene: 165 ° C.) / Polyethylene (sheath, melting point of polyethylene: 115 ° C.), and moisture-permeable film (Polyethylene microporous film (thickness 12 μm, average flow pore size 33 nm) (melting point of polyethylene: 120 ° C.)), each of which is a nonwoven fabric / a moisture permeable film / a moisture permeable film / They were arranged in the order of the nonwoven fabric, and a functional sheet having a virus barrier property class 6, a blood barrier property class 6, and a moisture permeability of 340 g / m ² / hr was obtained in the same manner as in Example 1. The protective clothing was obtained in the same manner as in Example 1 except that the fused portion had a continuous fused portion as shown in FIG. 11 and a protective tape having a waterproof function was fused. It was. The shape of the continuous fusion part which the protective clothing of a present Example has is the same as what is shown in the conceptual diagram of FIG. 4, The photograph shown in FIG. 11 is the continuous fusion part which the protective clothing of a present Example has It shows a part of. That is, the continuous fusion | melting part which the protective clothing of a present Example has is such that the continuous fusion | melting part as shown in FIG. 11 was provided continuously from one edge part of the laminated body to the other edge part. there were.

[Example 3]
A spunbonded nonwoven fabric (weight per unit area: 30 g / m ² , thickness: 0.2 mm) made of polypropylene (core, melting point of polypropylene: 165 ° C.) / Polyethylene (sheath, melting point of polyethylene: 115 ° C.), and moisture-permeable film (Polyethylene microporous film (thickness: 12 μm, average flow pore size: 33 nm) (melting point of polyethylene: 120 ° C.)) is used one by one, so that the outer layer in the protective clothing is in the order of moisture permeable film / nonwoven fabric. In the same manner as in Example 1, a functional sheet having a virus barrier property class 4, a blood barrier property class 4, and a moisture permeability of 400 g / m ² / hr was obtained. A protective garment was obtained in the same manner as in Example 1 except that the fused part had a continuous fused part as shown in FIG. The shape of the continuous fusion part which the protective clothing of a present Example has is the same as what is shown in the conceptual diagram of FIG. 5, The photograph shown in FIG. 9 is the continuous fusion part which the protective clothing of a present Example has. It shows a part of. That is, the continuous fusion | melting part which the protective clothing of a present Example has is such that the continuous fusion | melting part as shown in FIG. 9 was provided continuously from one edge part of the laminated body to the other edge part. there were.

[Example 4]
A protective garment was obtained in the same manner as in Example 1 except that the fused part of the functional sheet had a form having a continuous fused part as shown in FIG. The shape of the continuous fusion part which the protective clothing of a present Example has is the same as what is shown in the conceptual diagram of FIG. 5, and the photograph shown in FIG. 7 is the continuous fusion part which the protective clothing of a present Example has. It shows a part of. That is, the continuous fusion | melting part which the protective clothing of a present Example has is a thing by which the continuous fusion | melting part as shown in FIG. 7 was provided continuously from one edge part of the laminated body to the other edge part. there were.

[Example 5]
A protective garment was obtained in the same manner as in Example 1 except that the fused portion of the functional sheet had a continuous fused portion as shown in FIG. The shape of the continuous fusion part which the protective clothing of a present Example has is the same as what is shown in the conceptual diagram of FIG. 4, and the photograph shown in FIG. 8 is the continuous fusion part which the protective clothing of a present Example has. It shows a part of. That is, the continuous fusion | melting part which the protective clothing of a present Example has has the continuous fusion | melting part as shown in FIG. 8 provided continuously from one edge part of the laminated body to the other edge part. there were.

[Example 6]
^Two spunbond non-woven fabrics (basis weight 30 g / m ² , thickness 0.2 mm) composed of core / sheath fibers of polypropylene (core, polypropylene melting point: 165 ° C.) / Polyethylene (sheath, polyethylene melting point: 115 ° C.) Using a moisture-permeable film (polyethylene microporous film (thickness 20 μm, average flow pore size 19 nm) (melting point of polyethylene: 120 ° C.)), the fused portion of the functional sheet was continuously melted as shown in FIG. A protective garment was obtained in the same manner as in Example 1 except that the dressing part was used. The shape of the continuous fusion part which the protective clothing of a present Example has is the same as what is shown in the conceptual diagram of FIG. 4, and the photograph shown in FIG. 10 is the continuous fusion part which the protective clothing of a present Example has. It shows a part of. That is, the continuous fusion | melting part which the protective clothing of a present Example has is a thing by which the continuous fusion | melting part as shown in FIG. 10 was provided continuously from one edge part of the laminated body to the other edge part. there were.

[Example 7]
A protective garment was obtained in the same manner as in Example 6 except that the fused portion of the functional sheet had a continuous fused portion as shown in FIG. The shape of the continuous fusion part which the protective clothing of a present Example has is the same as what is shown in the conceptual diagram of FIG. 4, The photograph shown in FIG. 11 is the continuous fusion part which the protective clothing of a present Example has It shows a part of. That is, the continuous fusion | melting part which the protective clothing of a present Example has is such that the continuous fusion | melting part as shown in FIG. 11 was provided continuously from one edge part of the laminated body to the other edge part. there were.

[Comparative Example 1]
Virus in the same manner as in Example 1 except that two polypropylene spunbond nonwoven fabrics (basis weight 30 g / m ² , thickness 0.2 mm) and a polypropylene non-breathable film (thickness 15 μm, nonporous film) were used. A functional sheet and protective clothing having a barrier property class 6, a blood barrier property class 6, and a moisture permeability of 0 g / m ² / hr were obtained.

[Comparative Example 2]
In the fused portion of the functional sheet, a form having a discontinuous fused portion as shown in FIG. 12 was obtained, and protective clothing was obtained in the same manner as in Example 2. The discontinuous fusion part which the protective clothing of this comparative example has was such that the discontinuous fusion part as shown in FIG. 12 was provided from one end to the other end of the laminate.

[Comparative Example 3]
The fused portion of the functional sheet of the protective clothing of Example 2 was sewn by sewing using polyester yarn having a hydrophobic function (Sabanex (registered trademark) 120 SNA + WR of AMANN & Sonne GmbH & Co. KG). A protective garment was obtained in the same manner as in Example 2 except that the sewn part was obtained.

In the protective garments of Examples 1 to 7 and Comparative Examples 1 to 3, the virus barrier property, blood barrier property, moisture permeability, tensile strength, and water pressure resistance and function of the part of the protective garment including at least a part of the fused portion Table 1 summarizes the thickness, puncture strength, tensile strength (vertical), tensile strength (horizontal), and water resistance, and the rate of change of the water pressure resistance after practical use and the wearability of the protective clothing.

As is clear from Table 1, the protective clothing of the example has a high barrier property and moisture permeability as a whole including the fused portion, and the heat feeling and stuffiness when worn are also reduced. I understand.

On the other hand, Comparative Example 1 had high virus barrier properties and blood barrier properties, but was not moisture permeable, and felt a sense of heat and stuffiness in terms of wearability and was inferior in comfort.

Further, in Comparative Example 2, a liquid leak occurred between the fused portion by ultrasonic fusion, and in Comparative Example 3, a liquid leak occurred from a needle hole for sewing with a thread. For the above reasons, in Comparative Examples 2 and 3, the evaluation of the virus barrier property and blood barrier property of the part of the protective clothing including at least a part of the fused part or the sewing part is low. Therefore, the water pressure resistance evaluation and the wearability test after practical use were not performed.

Further, Examples 1, 2, 4 to 7 have a high rate of change in water pressure resistance after practical use, and function as a protective layer for the film by arranging a non-woven fabric on the outer layer side of the protective clothing. It can be seen that it has high practicality as a protective suit.

Example 2 shows that by applying a waterproof tape to the fused part, a high tensile strength of the fused part and a high water pressure resistance of the fused part are realized, which is preferable as a protective garment.

Further, as the shape of the continuous fusion part, as exemplified in Examples 4 to 6, there are a plurality of fusion parts, and they meander from one end part to the other end part, Furthermore, it can be seen that the fused portions and the water pressure resistance of the fused portion are expressed by crossing the fused portions at a plurality of locations.

Further, when the protective clothing of Example 4 and the protective clothing of Example 7 are compared, the virus barrier property, blood barrier property, and tensile strength of the region of the protective clothing including at least a part of the fused part are It can be seen that the protective suit No. 7 is superior to the protective suit of Example 4. This is presumed to be due to the fact that, in Example 7, the resin constituting the sheath of the core-sheath fiber used for the spunbonded nonwoven fabric and the resin constituting the moisture-permeable film are polyethylene having a close melting point. In other words, by adopting such a configuration, when the fused portion is formed by heating the laminated portion of the plurality of functional sheets at a temperature not lower than the melting point of polyethylene and not higher than the melting point of polypropylene, the sheath of the core-sheath fiber and moisture permeability It is presumed that this is because the film is sufficiently integrated and damage to the fiber layer and the moisture-permeable film is suppressed, and the fiber layer and the moisture-permeable film are firmly bonded.

Although the present invention has been described in detail using specific embodiments, it will be apparent to those skilled in the art that various modifications and variations can be made without departing from the spirit and scope of the invention. This application is based on a Japanese patent application filed on January 6, 2016 (Japanese Patent Application No. 2016-000830), which is incorporated by reference in its entirety.

According to the present invention, it is possible to provide protective clothing that is excellent in barrier properties such as blood barrier properties, virus barrier properties, liquid resistance, etc., and has excellent clothing comfort that reduces the feeling of heat and stuffiness when worn.

DESCRIPTION OF SYMBOLS 1 One part area | region of protective clothing 2 One functional sheet 3 The other functional sheet 4 Lamination | stacking part 5 Fusion | fusion part

Claims

Protective clothing with at least two functional sheets,
The two functional sheets each have a laminate in which a moisture permeable film and a fiber layer are laminated,
In the two functional sheets, a part of one functional sheet and a part of the other functional sheet of the two functional sheets are overlapped to form a laminated part,
The laminated portion has a fusion part continuous from one end portion to the other end portion in the laminated portion,
The part of the protective garment including at least a part of the fused part has a virus barrier property of class 4 or higher and a blood barrier property of class 4 or higher.
The protective clothing according to claim 1, wherein at least one of the two functional sheets has a plurality of moisture-permeable films.
At least one of the two functional sheets has a plurality of fiber layers,
The protective clothing according to claim 1 or 2, wherein at least two of the fiber layers are respectively disposed on outermost layers on both sides of a functional sheet having a plurality of fiber layers.
The protective garment according to any one of claims 1 to 3, wherein a waterproof protective layer is laminated on at least a part of the fusion part.
The plurality of fused portions, the fused portions meander from one end portion to the other end portion of the laminated portion, and the fused portions cross each other at a plurality of locations. The protective suit according to any one of the above.