Positive pressure protective clothing

Abstract

The present invention discloses a positive pressure protective clothing. The positive pressure protective clothing includes a protective clothing body and a hood, chemical-resistant shoe covers and chemical-resistant gloves connected to the protective clothing body. An airtight zipper device is provided on the protective clothing body. The hood, the protective clothing body and the chemical-resistant shoe covers are all made of protective clothing fabrics. The protective clothing fabrics include a load-bearing layer, a barrier layer and a load-bearing layer that are stacked and connected in sequence. The material for preparing the load-bearing layer includes the following components by mass: PLA 60-80%, PBAT 10-30%, flame retardant 1-9.5% and masterbatch 0.1-0.5%. The positive pressure protective clothing has good mechanical properties, anti-ignition and biodegradable properties, has good protective performance when in use, and reduces or even avoids the risk of damage caused by water in traditional technologies when working in humid or even water-splashing scenes.

Description

Technical Field

[0001] The invention relates to the technical field of radioactive pollution protection products, in particular to a positive pressure protective suit. Background Art

[0002] In nuclear facility workplaces, there are potential hazards such as radioactive surface contamination and air pollution. As front-line operators, they may inhale radioactive dust and aerosols if they are not careful, resulting in internal radiation. At this time, it is particularly important for nuclear facility workers to wear appropriate and effective protective equipment. In the existing technology, protective clothing with airtightness and continuous air supply is the most commonly used protective equipment in such workplaces.

[0003] The main material of existing protective clothing is PVC, which is disposable. Since PVC is non-degradable, its waste can usually only be processed by compression and fixation, which brings a large amount of radioactive solid waste and is not environmentally friendly. In addition, when PVC protective clothing is used for incineration, since PVC contains a large amount of chlorine, dioxins are easily formed in the exhaust gas, which seriously pollutes the environment.

[0004] Traditional degradable protective clothing can meet the needs of environmental friendliness. The PVA fabric in traditional degradable protective clothing is water-soluble, but since the PVA fabric dissolves in water, and workers wearing such protective clothing often need to work in humid or even water-splashed scenes, once the degradable protective clothing comes into contact with water, it may be damaged, thus losing its protective effect. Summary of the invention

[0005] Based on this, a positive pressure protective suit is provided to solve the problem that the traditional degradable protective suit may be damaged when working in a humid or even water splashing environment, thereby losing the protective effect. The positive pressure protective suit of the present invention has good protective effect and is biodegradable after use, with minimal impact on the environment.

[0006] A positive pressure protective clothing, comprising a protective clothing body, a hood connected to the upper part of the protective clothing body, a chemical-resistant shoe cover at the lower part, and chemical-resistant gloves on the sleeve side, the protective clothing body is provided with an airtight zipper device, the chemical-resistant gloves are detachably connected to the protective clothing body, the hood, the protective clothing body and the chemical-resistant shoe cover are all made of protective clothing fabric, the protective clothing fabric comprises a load-bearing layer, a barrier layer and a load-bearing layer stacked in sequence, and the load-bearing layer is made of the following components by weight:

[0007] PLA 60-80%;

[0008] PBAT 10-30%;

[0009] Flame retardant 1-9.5%; and

[0010] Color masterbatch 0.1~0.5%.

[0011] In some embodiments, the material for preparing the bearing layer includes the following components by weight:

[0012] PLA 65-70%;

[0013] PBAT 20-25%;

[0014] Flame retardant 5-9%; and

[0015] Color masterbatch 0.1~0.2%.

[0016] In some embodiments, the bearing layer has a thickness of 0.1-0.2 mm.

[0017] In some embodiments, the flame retardant includes 1-5% zirconium phosphate and 95-99% aluminum hydroxide or zinc borate.

[0018] In some embodiments, the barrier layer is made of one or more materials selected from PHBV, PLA, PBAT, PCL, PBSA and PBS.

[0019] In some embodiments, the barrier layer has a thickness of 0.05-0.1 mm.

[0020] In some embodiments, the transparent hood has a transparent window, and / or the protective clothing body is provided with a transparent window;

[0021] The transparent window is a double-layer structure connected with an inner layer and an outer layer, the inner layer is a fully transparent and degradable PVA film, and the thickness of the inner layer is 0.15-0.25 mm; the outer layer is a fully transparent and degradable composite film blown by PLA, PBAT or a blend of the two, and the thickness of the outer layer is 0.1-0.2 mm.

[0022] In some embodiments, the inner layer and the outer layer are connected by a connecting layer, the connecting layer is a PVA adhesive layer, and the adhesive amount of the connecting layer is 1 to 5 g / m 2 .

[0023] In some embodiments, the sleeve side of the protective clothing body has a tear seam, and a tear strip is connected to the sleeve side, the tear strip covers the tear seam and connects the two sides of the tear seam, and at least one end of the tear strip protrudes from the sleeve side of the protective clothing body.

[0024] In some embodiments, the tear strip is made of the same material as the protective clothing body;

[0025] and / or, the length of the tear strip is 30 to 40 cm;

[0026] and / or, the tear strip has a width of 1 to 2 cm;

[0027] and / or, the tear strip has a thickness of 0.2 to 0.4 mm;

[0028] And / or, the length of the end of the tear strip protruding from the sleeve side of the protective clothing body is 1 to 1.5 cm.

[0029] In some embodiments, the width of the tear seam is 1 to 2 mm;

[0030] And / or, the tear seam is close to the cuff of the sleeve side of the protective clothing body and is 3 to 5 cm away from the cuff of the sleeve side of the protective clothing body.

[0031] In some of the embodiments, a one-way exhaust valve is also provided on the protective clothing body.

[0032] In some of the embodiments, the positive pressure protective suit further comprises a breathing air supply system, wherein the breathing air supply system is connected to and communicates with the protective suit main body, and the protective suit main body is used to provide clean air to the interior of the protective suit main body.

[0033] The positive pressure protective clothing mentioned above can avoid the environmental burden caused by the non-degradable PVC materials used in traditional protective clothing, such as the non-degradable waste and the easy generation of dioxins during incineration. At the same time, it can also solve the problem of limited usage scenarios caused by the use of water-soluble PVA materials in traditional technology, which makes the protective clothing unable to be used in humid or splashing environments. The positive pressure protective clothing mentioned above also uses biodegradable composite materials, which have good mechanical properties, chemical protection properties and biodegradable characteristics. The waste after use can be degraded through simple treatment, which is very friendly to the environment.

[0034] The above-mentioned positive pressure protective clothing, as a respiratory and body protection equipment, can provide a protection level far higher than that of ordinary masks and hoods. It can not only completely isolate the workers from the polluted environment, but also provide clean flowing air for the inside of the protective clothing by purifying the air environment or using an independent breathing air supply system, which has higher safety and comfort.

[0035] The main material of the above-mentioned positive pressure protective clothing adopts a load-bearing layer, a barrier layer and a load-bearing layer. Through a multi-layer composite design, it has good mechanical properties, ignition resistance and biodegradable properties. The positive pressure protective clothing has good protective performance when in use, reducing or even avoiding the risk of damage caused by water in traditional technologies when operating in humid or even water-splashing scenes. The main body of degradable material lays the foundation for the composting degradation treatment of protective clothing. It can be completely degraded in a relatively short time without residue, is harmless to the environment, and avoids the environmental pollution problems caused by traditional non-degradable materials.

[0036] The above-mentioned positive pressure protective clothing realizes the tearable separation design of the chemical protective gloves and the protective clothing body by setting the tear seam, so that the chemical protective gloves can be quickly separated from the protective clothing body after use. After the non-degradable chemical protective gloves are quickly separated from the protective clothing body, the non-degradable chemical protective gloves can be treated separately. After the surface radioactive pollutants of the protective clothing body, the hood and the chemical protective shoe covers are removed by washing and disinfection, they can be subjected to industrial composting degradation treatment. It has been measured that the relative biodegradation rate is 93% to 99% within 180 days. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0038] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings. In the following description, the same reference numerals represent the same parts.

[0039] Figure 1 This is a schematic diagram of a positive pressure protective suit according to an embodiment of the present invention.

[0040] Description of Reference Numerals

[0041] 10. Positive pressure protective clothing; 100. Protective clothing body; 200. Hood; 300. Chemical protective shoe covers; 400. Chemical protective gloves; 500. Tear strip; 600. Transparent window. DETAILED DESCRIPTION

[0042] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0043] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0044] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0045] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0047] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0048] In the description of the present invention, "several" means more than one, "many" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0049] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0050] The embodiment of the present application provides a positive pressure protective clothing 10 to solve the problem that the conventional degradable protective clothing may be damaged and lose the protective effect when it is used in a humid or even water splashing environment.

[0051] The positive pressure protective clothing 10 provided in the embodiment of the present application is exemplary, please refer to Figure 1 As shown, Figure 1 The positive pressure protective clothing 10 of the present application can be used in workplaces with potential hazards such as radioactive surface contamination and air pollution, such as nuclear facilities, to provide protection for front-line operators.

[0052] In order to more clearly illustrate the structure of the positive pressure protective suit 10 , the positive pressure protective suit 10 will be introduced below with reference to the accompanying drawings.

[0053] For example, see Figure 1 As shown, Figure 1A positive pressure protective suit 10 includes a protective suit body 100, a hood 200 connected to the upper part of the protective suit body 100, chemical resistant shoe covers 300 at the lower part, and chemical resistant gloves 400 at the sleeve side.

[0054] The protective clothing body 100 is provided with an airtight zipper device. The setting position and setting length of the airtight zipper device can be set as needed. For example, the airtight zipper device is set at the back position of the protective clothing body 100, and the length of the airtight zipper device can extend from the neck of the protective clothing body 100 to the thigh of the protective clothing body 100. Figure 1 Not shown.

[0055] The chemical resistant gloves 400 are detachably connected to the protective clothing body 100 .

[0056] The hood 200, the protective clothing body 100 and the chemical-resistant shoe cover 300 are all made of protective clothing fabrics, and the protective clothing fabrics include a load-bearing layer, a barrier layer and a load-bearing layer that are sequentially stacked and connected.

[0057] The materials for preparing the bearing layer include the following components by weight:

[0058] PLA 60-80%;

[0059] PBAT 10-30%;

[0060] Flame retardant 1-9.5%; and

[0061] The color masterbatch is 0.1-0.5%. The above raw materials are mixed, extruded and granulated, and then blow-molded to prepare a bearing layer with good mechanical properties and anti-ignition properties.

[0062] The positive pressure protective clothing 10 can avoid the environmental burden caused by the non-degradable PVC material used in traditional protective clothing, such as the non-degradable waste and the easy generation of dioxins during incineration. At the same time, it can also solve the problem of limited use scenarios caused by the use of water-soluble PVA materials in traditional technology, which makes the protective clothing unable to be used in humid or splashing environments. The positive pressure protective clothing 10 also uses biodegradable composite materials, which have good mechanical properties, chemical protection properties and biodegradable characteristics. The waste after use can be degraded through simple treatment, which is very friendly to the environment.

[0063] In some embodiments, the material for preparing the bearing layer includes the following components by weight:

[0064] PLA 65-70%;

[0065] PBAT 20-25%;

[0066] Flame retardant 5-9%; and

[0067] Color masterbatch 0.1~0.2%.

[0068] The fabrics of the above-mentioned hood 200, protective clothing body 100 and chemical protective shoe cover 300 are specifically a multi-layer structure, which is divided into a load-bearing layer, a barrier layer and a load-bearing layer from the inside and outside. The three layers are prepared separately and finally compounded into protective clothing fabrics by hot rolling. The performance of protective clothing fabrics meets the requirements of GB / T 41144-2021 "Requirements and Test Methods for Ventilated Protective Clothing for Radioactive Aerosols". The wear resistance of protective clothing fabrics is greater than 100 cycles (level 2), the flexural damage resistance is greater than 1000 cycles (level 1), and the tear resistance is greater than 20N (level 2). Since a single PLA material is used to prepare a film, although it has good solvent resistance and transparency, it has poor toughness and is not ignition resistant. Therefore, the protective clothing fabric formed by compounding PLA and PBAT in the present invention has good mechanical properties, chemical protection properties and biodegradable properties.

[0069] In some embodiments, the thickness of the bearing layer is 0.1-0.2 mm. For example, in one specific example, the thickness of the bearing layer is 0.1 mm, and in another specific example, the thickness of the bearing layer is 0.2 mm. It is not difficult to understand that in other examples, the thickness of the bearing layer can also be 0.11 mm, 0.12 mm, 0.13 mm, 0.14 mm, 0.15 mm, 0.16 mm, 0.17 mm, 0.18 mm, 0.19 mm or other parameters.

[0070] In some embodiments, the flame retardant includes 1-5% zirconium phosphate and 95-99% aluminum hydroxide or zinc borate. The flame retardant is halogen-free, low-smoke, low-toxic, environmentally friendly, and will not affect the biodegradability of the bearing layer.

[0071] In some embodiments, the barrier layer is made of one or more materials selected from PHBV, PLA, PBAT, PCL, PBSA and PBS.

[0072] In some embodiments, the barrier layer is prepared from one or more materials selected from PLA, PBAT and PCL. PLA, PBAT and PCL have good resistance to chemical penetration, can effectively block pollutants, and have a melting point closer to the bearing layer, which is conducive to thermal composite processing.

[0073] In some embodiments, the thickness of the barrier layer is 0.05-0.1 mm. Preferably, the thickness of the barrier layer is 0.06-0.08 mm. For example, in one specific example, the thickness of the barrier layer is 0.05 mm, and in another specific example, the thickness of the barrier layer is 0.1 mm.

[0074] In some embodiments, the transparent hood 200 has a transparent window 600, and / or the protective clothing body 100 is provided with a transparent window 600. The transparent window 600 is a double-layer structure with an inner layer and an outer layer connected, the inner layer is a fully transparent degradable PVA film, the thickness of the inner layer is 0.15-0.25 mm; the outer layer is a fully transparent degradable composite film blown by PLA, PBAT or a blend of the two, and the thickness of the outer layer is 0.1-0.2 mm. Preferably, the transparent hood 200 and the protective clothing body 100 are respectively provided with a transparent window 600 at the left chest position.

[0075] In some embodiments, the thickness of the inner layer is 0.2-0.22 mm, and the thickness of the outer layer is 0.14-0.18 mm. For example, in one specific example, the thickness of the inner layer is 0.2 mm, and in another specific example, the thickness of the inner layer is 0.22 mm. For example, in one specific example, the thickness of the outer layer is 0.14 mm, and in another specific example, the thickness of the outer layer is 0.18 mm.

[0076] In some embodiments, the inner layer and the outer layer are connected by a connecting layer, the connecting layer is a PVA adhesive layer, and the adhesive amount of the connecting layer is 1g / m 2 ~5g / m 2 Since the melting points of the inner and outer layer materials are quite different, they cannot be processed by thermal lamination. Therefore, the inner and outer layers are bonded together by a PVA adhesive layer formed by PVA glue.

[0077] In some embodiments, the sleeve side of the protective clothing body 100 has a tear seam, and a tear strip 500 is connected to the sleeve side. The tear strip 500 covers the tear seam and connects the two sides of the tear seam, and at least one end of the tear strip 500 protrudes from the sleeve side of the protective clothing body 100. Among them, the connection between the tear strip 500 and the protective clothing body 100 can be completed by an ultrasonic welding process. The chemical protective gloves 400 matched with the protective clothing body 100 are commercially available radioactive pollutant protective gloves that meet the requirements of GB 38452 standards. The material of the chemical protective gloves 400 is usually PVC, natural rubber, chloroprene rubber, etc. It is difficult to replace the degradable materials with the existing technology. The present invention combines the chemical protective gloves 400 with the cuffs of the protective clothing body 100 through an ultrasonic welding process, and a quick disassembly design is set at the cuffs. When the protective clothing is discarded, the gloves can be separated from the protective clothing through simple operations.

[0078] In some of the embodiments, the tear strip 500 is made of the same material as the protective clothing body 100 .

[0079] In some embodiments, the length of the tear strip 500 is 30-40 cm. For example, in one specific example, the length of the tear strip 500 is 30 cm, and in another specific example, the length of the tear strip 500 is 40 cm. It is not difficult to understand that the length of the tear strip 500 can be set according to actual needs.

[0080] In some embodiments, the width of the tear strip 500 is 1-2 cm. For example, in one specific example, the width of the tear strip 500 is 1 cm, and in another specific example, the width of the tear strip 500 is 2 cm. It is not difficult to understand that the width of the tear strip 500 can be set according to actual needs.

[0081] In some embodiments, the tear strip 500 has a thickness of 0.2 to 0.4 mm. For example, in one specific example, the thickness of the tear strip 500 is 0.2 cm, and in another specific example, the thickness of the tear strip 500 is 0.4 cm. It is not difficult to understand that the thickness of the tear strip 500 can be set according to actual needs.

[0082] In some embodiments, the end of the tear strip 500 protrudes from the sleeve side of the protective clothing body 100 by 1 to 1.5 cm. For example, in one specific example, the end of the tear strip 500 protrudes from the sleeve side of the protective clothing body 100 by 1 cm. In another specific example, the end of the tear strip 500 protrudes from the sleeve side of the protective clothing body 100 by 1.5 cm.

[0083] In some embodiments, the width of the tear seam is 1-2 mm. For example, in one specific example, the width of the tear seam is 1 mm. In another specific example, the width of the tear seam is 2 mm.

[0084] In some embodiments, the tear seam is close to the sleeve side cuff of the protective clothing body 100, and the tear seam is 3 to 5 cm away from the sleeve side cuff of the protective clothing body 100. For example, in one specific example, the tear seam is 3 cm away from the sleeve side cuff of the protective clothing body 100. In another specific example, the tear seam is 5 cm away from the sleeve side cuff of the protective clothing body 100.

[0085] The positive pressure protective clothing 10 described above realizes the tearable separation design of the chemical protective gloves 400 and the protective clothing body 100 by setting a tear seam, so that the chemical protective gloves 400 can be quickly separated from the protective clothing body 100 after the protective clothing is used. After the non-degradable chemical protective gloves 400 are quickly separated from the protective clothing body 100, the non-degradable chemical protective gloves 400 can be treated separately. After the surface radioactive pollutants of the protective clothing body 100, the hood 200 and the chemical protective shoe covers are removed by washing and disinfection, they can be subjected to industrial composting degradation treatment. It has been measured that within 180 days, the relative biodegradability rate is 93% to 99. Compared with the traditional incineration treatment or compression and packaging treatment method, the present invention greatly reduces the final output of radioactive waste, and the treatment process does not produce dioxins and other environmentally harmful products, and its use and treatment are both environmentally friendly.

[0086] In some embodiments, the protective clothing body 100 is also provided with a one-way exhaust valve. Figure 1 Not shown.

[0087] In some embodiments, the positive pressure protective suit 10 further includes a breathing air supply system. The breathing air supply system is connected to the protective suit body 100 and communicates with the protective suit body 100, and the protective suit body 100 is used to provide clean air to the inside of the protective suit body 100. Figure 1 Not shown.

[0088] Example 1

[0089] This embodiment provides a positive pressure protective suit 10.

[0090] The positive pressure protective clothing 10 of this embodiment includes a protective clothing body 100, a breathing air supply system connected to the protective clothing body 100, and a hood 200 connected to the upper part of the protective clothing body 100, a chemical-resistant shoe cover 300 at the lower part, and chemical-resistant gloves 400 on the sleeve side. An airtight zipper device is provided on the protective clothing body 100. The airtight zipper device is arranged at the back position of the protective clothing body 100, and the length of the airtight zipper device extends from the neck of the protective clothing body 100 to the thigh of the protective clothing body 100. A one-way exhaust valve is also provided on the protective clothing body 100. The chemical-resistant gloves 400 are detachably connected to the protective clothing body 100. The breathing air supply system is connected to the protective clothing body 100 and communicates with the protective clothing body 100, and the protective clothing body 100 is used to provide clean air to the inside of the protective clothing body 100.

[0091] The materials used to prepare the hood 200, the protective clothing body 100 and the anti-chemical shoe cover 300 are all protective clothing fabrics, and the protective clothing fabrics include a load-bearing layer, a barrier layer and a load-bearing layer that are stacked and connected in sequence. The load-bearing layer, the barrier layer and the load-bearing layer are combined together through a thermal composite process to form a multi-layer composite. The materials used to prepare the load-bearing layer include the following components by mass: 80% PLA, 15% PBAT, 4.9% flame retardant and 0.1% masterbatch. Among them, the flame retardant includes 1% zirconium phosphate and 99% aluminum hydroxide by mass. The thickness of the load-bearing layer is 0.12mm. The material used to prepare the barrier layer is selected from PLA. The thickness of the barrier layer is 0.06mm. The total thickness of the protective clothing fabric is 0.3mm. The above-mentioned mass component raw materials are formed by blending, extruding and granulating, and then blow molding. The performance of protective clothing fabrics meets the requirements of GB / T 41144-2021 "Requirements and test methods for ventilated protective clothing for radioactive aerosols". The wear resistance of protective clothing fabrics is greater than 100 cycles (level 2), the flexural damage resistance is greater than 1000 cycles (level 1), and the tear resistance is greater than 20N (level 2).

[0092] The transparent hood 200 has a transparent window 600 and a transparent window 600 is provided on the left chest of the protective clothing body 100. The transparent window 600 is a double-layer structure with an inner layer and an outer layer connected. The inner layer is a fully transparent and degradable PVA film with a thickness of 0.15mm; the outer layer is a fully transparent and degradable composite film blown by a blend of PLA and PBAT, with a thickness of 0.1mm, wherein the mass proportion of PBAT in the outer layer is 30%, and the mass proportion of PLA is 70%. The inner layer and the outer layer are connected by a connecting layer, which is a PVA adhesive layer, and the adhesive amount of the connecting layer is 1g / m 2 .

[0093] The sleeve side of the protective clothing body 100 has a tear seam, which is close to the sleeve side cuff of the protective clothing body 100 and 4 cm away from the sleeve side cuff of the protective clothing body 100. The width of the tear seam is 2 mm. A tear strip 500 is connected to the sleeve side, and the preparation material of the tear strip 500 is the same as the preparation material of the protective clothing body 100. The length of the tear strip 500 is 30 cm. The width of the tear strip 500 is 1 cm. The thickness of the tear strip 500 is 0.4 mm. The tear strip 500 covers the tear seam and connects the two sides of the tear seam. The connection between the tear strip 500 and the protective clothing body 100 can be completed by an ultrasonic welding process. One end of the tear strip 500 protrudes 1 cm from the sleeve side of the protective clothing body 100. The chemical protective gloves 400 matched with the protective clothing body 100 are commercially available radioactive contaminant protective gloves that meet the requirements of GB 38452 standard, and the material of the chemical protective gloves 400 is PVC.

[0094] After use, the positive pressure protective clothing 10 prepared in this embodiment can quickly separate the non-degradable gloves from the protective clothing body 100, and can be subjected to industrial composting degradation after removing the surface radioactive pollutants through washing and disinfection. Within 180 days, the relative biodegradability rate is 95%. Compared with the traditional incineration treatment or compression and packaging treatment method, the final output of radioactive waste is greatly reduced, and the treatment process does not produce dioxins and other environmentally harmful products, and its use and treatment are both environmentally friendly.

[0095] Example 2

[0096] The present embodiment provides a positive pressure protective suit 10. The positive pressure protective suit 10 provided in the present embodiment is basically the same as that in the embodiment 1, except that the material for preparing the load-bearing layer includes the following components by mass: PLA 70%, PBAT 25%, flame retardant 4.9% and masterbatch 0.1%. Among them, the flame retardant includes zirconium phosphate with a mass ratio of 3% and aluminum hydroxide with a mass ratio of 97%. The thickness of the load-bearing layer is 0.12mm. The material for preparing the barrier layer is selected from PLA. The thickness of the barrier layer is 0.06mm. The total thickness of the fabric of the protective suit is 0.3mm. After use, the positive pressure protective suit 10 prepared in the present embodiment quickly separates the non-degradable gloves from the protective suit body 100, and can be subjected to industrial composting degradation treatment after removing the surface radioactive contaminants by washing and disinfection. Within 180 days, the relative biodegradability rate is 96%.

[0097] Example 3

[0098] The present embodiment provides a positive pressure protective suit 10. The positive pressure protective suit 10 provided in the present embodiment is basically the same as that in the embodiment 1, except that the material for preparing the load-bearing layer includes the following components by mass: PLA 65%, PBAT 25%, flame retardant 8.8% and masterbatch 0.2%. Among them, the flame retardant includes zirconium phosphate with a mass ratio of 3% and aluminum hydroxide with a mass ratio of 97%. The thickness of the load-bearing layer is 0.12mm. The material for preparing the barrier layer is selected from PLA. The thickness of the barrier layer is 0.06mm. The total thickness of the fabric of the protective suit is 0.3mm. After use, the positive pressure protective suit 10 prepared in the present embodiment quickly separates the non-degradable gloves from the protective suit body 100, and can be subjected to industrial composting degradation treatment after removing the surface radioactive contaminants by washing and disinfection. Within 180 days, the relative biodegradability rate is 94%.

[0099] Example 4

[0100] The present embodiment provides a positive pressure protective suit 10. The positive pressure protective suit 10 provided in the present embodiment is basically the same as that in the embodiment 1, except that the material for preparing the load-bearing layer includes the following components by mass: PLA 70%, PBAT 20%, flame retardant 8.8% and masterbatch 0.2%. Among them, the flame retardant includes zirconium phosphate with a mass ratio of 3% and aluminum hydroxide with a mass ratio of 97%. The thickness of the load-bearing layer is 0.12mm. The material for preparing the barrier layer is selected from PLA. The thickness of the barrier layer is 0.06mm. The total thickness of the fabric of the protective suit is 0.3mm. After use, the positive pressure protective suit 10 prepared in the present embodiment quickly separates the non-degradable gloves from the protective suit body 100, and can be subjected to industrial composting degradation treatment after removing the surface radioactive contaminants by washing and disinfection. Within 180 days, the relative biodegradability rate is 95.7%.

[0101] Comparative Example 1

[0102] This comparative example provides a positive pressure protective clothing. The positive pressure protective clothing provided in this embodiment is basically the same as that in Example 1, except that the material for preparing the load-bearing layer includes the following components by mass: 70% PVC, 20% PBAT, 8.8% flame retardant and 0.2% masterbatch. Among them, the flame retardant includes 3% zirconium phosphate and 97% aluminum hydroxide by mass. The thickness of the load-bearing layer is 0.12mm. The material for preparing the barrier layer is selected from PLA. The thickness of the barrier layer is 0.06mm. The total thickness of the fabric of the protective clothing is 0.3mm. After use, the positive pressure protective clothing 10 prepared in this embodiment quickly separates the non-degradable gloves from the protective clothing body 100, and can be subjected to industrial composting degradation treatment after removing the surface radioactive contaminants by washing and disinfection. Within 180 days, the relative biodegradability rate is 15.3%.

[0103] Comparative Example 2

[0104] This comparative example provides a positive pressure protective clothing. The positive pressure protective clothing provided in this embodiment is basically the same as that in Example 1, except that the material for preparing the load-bearing layer includes the following components by mass: 70% PLA, 20% PVC, 8.8% flame retardant and 0.2% masterbatch. Among them, the flame retardant includes 3% zirconium phosphate and 97% aluminum hydroxide by mass. The thickness of the load-bearing layer is 0.12mm. The material for preparing the barrier layer is selected from PLA. The thickness of the barrier layer is 0.06mm. The total thickness of the fabric of the protective clothing is 0.3mm. After use, the positive pressure protective clothing 10 prepared in this embodiment quickly separates the non-degradable gloves from the protective clothing body 100, and can be subjected to industrial composting degradation treatment after removing the surface radioactive contaminants by washing and disinfection. Within 180 days, the relative biodegradability rate is 60.5%.

[0105] In summary, the above-mentioned positive pressure protective clothing 10 as a respiratory and body protection equipment can provide a protection level far higher than that of ordinary masks and hoods 200. It can not only completely isolate the staff from the polluted environment, but also provide clean flowing air for the inside of the protective clothing by purifying the air environment or using an independent breathing air supply system, which has higher safety and comfort. The main material of the above-mentioned positive pressure protective clothing 10 adopts a load-bearing layer, a barrier layer and a load-bearing layer. Through a multi-layer composite design, it has good mechanical properties, ignition resistance and biodegradable properties. When the positive pressure protective clothing 10 is in use, the protective performance is good, reducing or even avoiding the risk of damage caused by water in traditional technology when working in humid or even water splashing scenes. The main body of the degradable material lays the foundation for the composting degradation treatment of the protective clothing. It can be completely degraded in a relatively short time without residue, harmless to the environment, and avoids the environmental pollution problems caused by traditional non-degradable materials.

[0106] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0107] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0108] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A positive pressure protective clothing, characterized in that: It comprises a protective clothing body, a hood connected to the upper part of the protective clothing body, a chemical-resistant shoe cover at the lower part and chemical-resistant gloves on the sleeve side, the protective clothing body is provided with an airtight zipper device, the chemical-resistant gloves are detachably connected to the protective clothing body, the hood, the protective clothing body and the chemical-resistant shoe cover are all made of protective clothing fabric, the protective clothing fabric comprises a load-bearing layer, a barrier layer and a load-bearing layer which are sequentially stacked and connected; the thickness of the load-bearing layer is 0.1-0.2 mm; the thickness of the barrier layer is 0.05-0.1 mm; The barrier layer is made of one or more materials selected from PHBV, PLA, PBAT, PCL, PBSA and PBS; The preparation material of the bearing layer includes the following components by weight: PLA 60~80%; PBAT 10~30%; Flame retardant 1~9.5%; and Color masterbatch 0.1~0.5%.

2. The positive pressure protective clothing according to claim 1, characterized in that: The preparation material of the bearing layer includes the following components by weight: PLA 65-70%; PBAT 20~25%; Flame retardant 5~9%; and Color masterbatch 0.1~0.2%.

3. The positive pressure protective clothing according to claim 1, characterized in that: The flame retardant includes 1-5% of zirconium phosphate and 95-99% of aluminum hydroxide or zinc borate.

4. The positive pressure protective clothing according to any one of claims 1 to 3, characterized in that: The hood has a transparent window, and / or the protective clothing body is provided with a transparent window; The transparent window is a double-layer structure connected with an inner layer and an outer layer, the inner layer is a fully transparent and degradable PVA film, and the thickness of the inner layer is 0.15~0.25mm; the outer layer is a fully transparent and degradable composite film blown by PLA, PBAT or a blend of the two, and the thickness of the outer layer is 0.1~0.2mm.

5. The positive pressure protective clothing according to claim 4, characterized in that: The inner layer and the outer layer are connected by a connecting layer, the connecting layer is a PVA adhesive layer, and the adhesive amount of the connecting layer is 1-5g / m 2 .

6. The positive pressure protective clothing according to any one of claims 1 to 3 and 5, characterized in that: The sleeve side of the protective clothing body has a tear seam, and the sleeve side is connected with a tear strip, which covers the tear seam and connects the two sides of the tear seam, and at least one end of the tear strip protrudes from the sleeve side of the protective clothing body.

7. The positive pressure protective clothing according to claim 6, characterized in that: The tear strip is connected to the protective clothing body by an ultrasonic welding process.

8. The positive pressure protective clothing according to claim 6, characterized in that: The tear strip is made of the same material as the protective clothing body; And / or, the length of the tear strip is 30-40 cm; And / or, the width of the tear strip is 1 to 2 cm; And / or, the tear strip has a thickness of 0.2-0.4 mm; And / or, the length of the end of the tear strip protruding from the sleeve side of the protective clothing body is 1-1.5 cm.

9. The positive pressure protective clothing according to claim 8, characterized in that: The width of the tear seam is 1-2 mm.

10. The positive pressure protective clothing according to claim 8, characterized in that: The tear seam is close to the sleeve side cuff of the protective clothing body and is 3 to 5 cm away from the sleeve side cuff of the protective clothing body.

11. The positive pressure protective clothing according to any one of claims 1 to 3, 5, 9 to 10, characterized in that: The protective clothing body is also provided with a one-way exhaust valve.

12. The positive pressure protective clothing according to any one of claims 1 to 3, 5, 9 to 10, characterized in that: The positive pressure protective suit also includes a breathing air supply system, which is connected to the protective suit main body and communicates with the protective suit main body, and the protective suit main body is used to provide clean air to the interior of the protective suit main body.

Images