Protective fabric and protective clothing using same

Abstract

The invention discloses a protective fabric and protective clothing using the same, relates to the technical field of protective materials, and solves the problem that batch preparation of individual protective equipment in a high-grade biosafety laboratory is limited. The packaging film sequentially comprises a chemical resistance layer, a blocking layer, a bonding layer, a force bearing layer and a heat sealing layer from outside to inside. The force bearing layer is selected from polyamide fiber, polyester fiber, aramid fiber, polyarylate fiber and PBO fiber; the chemical resistant layer is selected from polyvinyl chloride, polyester, fluoride resin, polyethylene and thermoplastic polyurethane elastomer; the barrier layer comprises an upper barrier layer, a lower barrier layer and a middle barrier layer, and is selected from a polyurethane film, a polyester film, a polyvinyl chloride film, a polyvinylidene chloride film, a polyvinyl fluoride film, a Mylar film, an EVOH film and a PET film; the middle barrier layer comprises a two-component polyurethane adhesive, a solvent, a curing agent and a light stabilizer; the bonding layer and the heat sealing layer comprise a single-component polyurethane adhesive and a solvent. The method can be applied to manufacturing of high-grade biological safety laboratory individual protection equipment.

Description

Technical Field

[0001] The invention relates to the technical field of protective materials, and in particular to a protective fabric and protective clothing using the fabric. Background Art

[0002] In order to respond to biosecurity threats such as major new and emerging infectious disease outbreaks, it is urgent to enhance biosecurity protection capabilities.

[0003] As for protective materials, there are mainly microporous film / non-woven fabric composite materials (polytetrafluoroethylene, PTFE), which have good protective properties. Flash-steamed polyethylene materials have excellent comprehensive properties such as comfort and protection.

[0004] At present, there is still no batch of positive pressure protective clothing fabrics that can be directly used for personal protective equipment in high-level biosafety laboratories. Summary of the invention

[0005] In order to solve the problem of limited batch preparation of personal protective equipment for high-level biosafety laboratories, the present invention provides a protective fabric and protective clothing using the fabric.

[0006] The technical solution of the present invention is as follows:

[0007] A protective fabric adopts a multi-layer composite structure, which includes a chemical-resistant layer, a barrier layer, an adhesive layer, a load-bearing layer and a heat-sealing layer from the outside to the inside;

[0008] The load-bearing layer is one of nylon fiber, polyester fiber, aramid fiber, polyarylate fiber, and PBO fiber; nylon fiber is preferred, which has excellent wear resistance, high strength, excellent resilience and fatigue resistance, low density, light weight, and good moisture absorption, which can enhance the comfort of the wearer.

[0009] The chemical-resistant layer is composed of one or more of polyvinyl chloride, polyester, fluoride resin, polyethylene, and thermoplastic polyurethane elastomer; preferably, the yellowing-resistant thermoplastic polyurethane film material can improve the material's yellowing resistance. This type of film material has high strength and excellent antioxidant properties, resistance to disinfectants and solvents.

[0010] The barrier layer is composed of an upper barrier layer, a lower barrier layer and an intermediate barrier layer; the lower barrier layer is bonded to the adhesive layer, and the upper barrier layer is bonded to the chemical-resistant layer;

[0011] The upper barrier layer and the lower barrier layer are both composed of one or more of polyurethane film, polyester film, polyvinyl chloride film, polyvinylidene chloride film, polyvinyl fluoride film, Mylar film, EVOH film, and PET film; polyurethane film material is preferred. The larger the unit volume mass and the higher the thickness of the film material, the better the air tightness and protection of the material.

[0012] The intermediate barrier layer is composed of the following components in parts by mass: 20 to 60 parts of a two-component polyurethane adhesive, 50 to 200 parts of a solvent, 0.01 to 0.3 parts of a curing agent, and 0.1 to 0.5 parts of a light stabilizer; the two-component polyurethane adhesive can be effectively bonded to the polyurethane films of the upper barrier layer and the lower barrier layer, and the light stabilizer can improve the strength loss of the material under long-term sunlight or ultraviolet irradiation

[0013] The adhesive layer is composed of the following components in parts by mass: 10 to 40 parts of a single-component polyurethane adhesive and 50 to 100 parts of a solvent;

[0014] The heat sealing layer is composed of the following components in parts by mass: 10 to 40 parts of a single-component polyurethane adhesive and 50 to 100 parts of a solvent. The single-component polyurethane adhesive can better fit the load-bearing layer.

[0015] Preferably, the solvent is selected from one or more of butanone, toluene, ethyl acetate, dimethylformamide and dimethylacetamide.

[0016] Preferably, the light stabilizer is B75, and the curing agent is an amine curing agent.

[0017] Preferably, the weight of the chemical resistant layer is 10 g / m 2 ~40g / m 2 , thickness is 10μm~25μm.

[0018] Preferably, the upper barrier layer has a grammage of 40 g / m 2 ~80g / m 2 , thickness is 30μm~60μm.

[0019] Preferably, the weight of the lower barrier layer is 10 g / m 2 ~30g / m 2 , thickness is 10μm~25μm.

[0020] Preferably, the molecular weight of the intermediate barrier layer is 1000-50000, and the solid content is greater than 50%.

[0021] Preferably, the molecular weight of the single-component polyurethane adhesive in the adhesive layer is 100,000 to 500,000, and the solid content is 30% to 60%.

[0022] Preferably, the molecular weight of the single-component polyurethane adhesive in the heat-sealing layer is 100,000 to 500,000, and the solid content is 30% to 60%.

[0023] The present invention also provides a protective suit, which is made of the protective fabric.

[0024] Compared with the prior art, the specific beneficial effects of the present invention are:

[0025] The fabric provided by the present invention adopts a multi-layer composite structure, and the chemical-resistant layer is located at the outermost layer of the protective clothing fabric, and has corrosion resistance, oxidation resistance, and disinfection resistance. The barrier layer has good gas-liquid barrier performance and rubbing resistance, and has a moisture permeability effect, which improves the wearing comfort. The load-bearing layer has the characteristics of light weight and high strength. High-strength nylon fiber, polyester fiber, aramid fiber, polyarylate fiber or PBO fiber fabric ensures that the entire composite fabric has high tensile strength, tear strength and other mechanical properties and wear resistance, good hygroscopicity, and can enhance the comfort of the wearer. The adhesive layer can effectively bond the barrier layer to the load-bearing layer, and the heat-sealing layer has the effects of hot melt, flexibility, and wear resistance. In summary, the material provided by the present invention has corrosion resistance, oxidation resistance, disinfection resistance, as well as good gas-liquid barrier, rubbing resistance, wear resistance, moisture permeability and other properties.

[0026] The fabric provided by the present invention has a simple preparation process and low cost;

[0027] The invention can be applied to the manufacture of personal protective equipment in high-level biosafety laboratories. DETAILED DESCRIPTION

[0028] In order to make the technical solution of the present invention clearer, the technical solution in the embodiments of the present invention is clearly and completely described below. It should be noted that the following embodiments are only used to better understand the technical solution of the present invention and should not be understood as limiting the present invention.

[0029] Example 1.

[0030] Bearing layer:

[0031] The bearing layer is made of nylon fiber, and the bearing layer is pre-treated by washing and drying. The weight of the bearing layer is 130g / m 2 ;

[0032] Heat seal layer:

[0033] The heat sealing layer is composed of the following components by mass: 15 parts of a single-component polyurethane adhesive and 75 parts of a solvent. In the heat sealing layer, the molecular weight of the single-component polyurethane adhesive is 1000-50000, the solid content is 35%, and the solvent is ethyl acetate, dimethylformamide and toluene. The heat sealing layer is coated on the bearing layer with a gram weight of 20g / m 2 ;

[0034] Barrier layer:

[0035] The barrier layer is composed of an upper barrier layer, a lower barrier layer and an intermediate barrier layer, wherein the lower barrier layer is bonded to the adhesive layer, and the upper barrier layer is bonded to the chemical-resistant layer;

[0036] The upper barrier layer and the lower barrier layer of the barrier layer are both thermoplastic polyurethane films of different types, wherein the upper barrier layer has a gram weight of 60g / m 2 , thickness is 45μm, the weight of the lower barrier layer is 20g / m 2 , thickness is 11 μm;

[0037] The middle barrier layer of the barrier layer is composed of the following components in parts by mass: 35 parts of a two-component polyurethane adhesive, 35 parts of a solvent, 0.034 parts of a curing agent, and 0.15 parts of a light stabilizer;

[0038] Adhesive layer:

[0039] The adhesive layer is composed of the following components by mass: 15 parts of a single-component polyurethane adhesive and 75 parts of a solvent. In the heat-sealing layer, the molecular weight of the single-component polyurethane adhesive is 1000-50000, the solid content is 35%, and the solvent is ethyl acetate, dimethylformamide and toluene. The adhesive layer is coated on the bearing layer with a gram weight of 20 g / m 2 ;

[0040] Chemical resistant layer:

[0041] The chemical-resistant layer is composed of different types of yellowing-resistant thermoplastic polyurethane films, and the weight of the chemical-resistant layer is 20g / m 2 , thickness is 13μm.

[0042] The compounding process is as follows:

[0043] After the load-bearing layer is cleaned and dried for pretreatment, the adhesive layer and the heat-sealing layer are coated on the front and back sides, the lower barrier layer is compounded through the adhesive layer, and then the chemical-resistant layer is compounded with the upper barrier layer. The compounded upper barrier layer is coated with the middle barrier layer and compounded with the lower barrier layer at the same time to obtain the protective fabric.

[0044] Example 2.

[0045] Bearing layer:

[0046] The bearing layer is made of nylon fiber, and the bearing layer is pre-treated by drying. The weight of the bearing layer is 130g / m 2 ;

[0047] Heat seal layer:

[0048] The heat sealing layer is composed of the following components by mass: 25 parts of a single-component polyurethane adhesive and 125 parts of a solvent. In the heat sealing layer, the molecular weight of the single-component polyurethane adhesive is 1000-50000, the solid content is 35%, and the solvent is ethyl acetate, dimethylformamide and toluene. The heat sealing layer is coated on the bearing layer with a gram weight of 35g / m 2 ;

[0049] Barrier layer:

[0050] The barrier layer is composed of an upper barrier layer, a lower barrier layer and an intermediate barrier layer, wherein the lower barrier layer is bonded to the adhesive layer, and the upper barrier layer is bonded to the chemical-resistant layer;

[0051] The upper barrier layer and the lower barrier layer of the barrier layer are both thermoplastic polyurethane films of different types, wherein the upper barrier layer has a gram weight of 50g / m 2 , thickness is 42μm, the weight of the lower barrier layer is 25g / m 2 , thickness is 14 μm;

[0052] The middle layer of the barrier layer is composed of the following components in parts by mass: 40 parts of a two-component polyurethane adhesive, 40 parts of a solvent, 0.087 parts of a curing agent, and 0.19 parts of a light stabilizer;

[0053] Adhesive layer:

[0054] The adhesive layer is composed of the following components by mass: 35 parts of a single-component polyurethane adhesive and 1 part of a solvent. In the heat-sealing layer, the molecular weight of the single-component polyurethane adhesive is 1000-50000, the solid content is 45%, and the solvent is ethyl acetate, dimethylformamide and toluene. The weight of the heat-sealing layer on the bearing layer is 35g / m 2 ;

[0055] Chemical resistant layer:

[0056] The chemical-resistant layer is composed of different types of yellowing-resistant thermoplastic polyurethane films, and the weight of the chemical-resistant layer is 30 g / m 2 , thickness is 15μm.

[0057] The compounding process is as follows:

[0058] After the load-bearing layer is cleaned and dried for pretreatment, the adhesive layer and the heat-sealing layer are coated on the front and back sides, the lower barrier layer is compounded through the adhesive layer, and then the chemical-resistant layer is compounded with the upper barrier layer. The compounded upper barrier layer is coated with the middle barrier layer and compounded with the lower barrier layer at the same time to obtain the protective fabric.

[0059] Example 3

[0060] Bearing layer:

[0061] The bearing layer is made of nylon fiber, and the bearing layer is pre-treated by drying. The weight of the bearing layer is 160g / m 2 ;

[0062] Heat seal layer:

[0063] The heat sealing layer is composed of the following components by mass: 15 parts of a single-component polyurethane adhesive and 75 parts of a solvent. In the heat sealing layer, the molecular weight of the single-component polyurethane adhesive is 1000-50000, the solid content is 35%, and the solvent is ethyl acetate, dimethylformamide and toluene. The heat sealing layer is coated on the bearing layer with a gram weight of 20g / m 2 ;

[0064] Barrier layer:

[0065] The barrier layer is composed of an upper barrier layer, a lower barrier layer and an intermediate barrier layer, wherein the lower barrier layer is bonded to the adhesive layer, and the upper barrier layer is bonded to the chemical-resistant layer;

[0066] The upper barrier layer and the lower barrier layer of the barrier layer are both thermoplastic polyurethane films of different types, wherein the upper barrier layer has a gram weight of 70g / m 2 , thickness is 48μm, weight of lower barrier layer is 10g / m 2 , thickness is 10 μm;

[0067] The middle layer of the barrier layer is composed of the following components in parts by mass: 55 parts of a two-component polyurethane adhesive, 55 parts of a solvent, 0.147 parts of a curing agent, and 0.28 parts of a light stabilizer;

[0068] Adhesive layer:

[0069] The adhesive layer is composed of the following components by mass: 35 parts of a single-component polyurethane adhesive and 1 part of a solvent. In the heat-sealing layer, the molecular weight of the single-component polyurethane adhesive is 1000-50000, the solid content is 45%, and the solvent is ethyl acetate, dimethylformamide and toluene. The weight of the heat-sealing layer on the bearing layer is 35g / m 2 ;

[0070] Chemical resistant layer:

[0071] The chemical-resistant layer is composed of different types of yellowing-resistant thermoplastic polyurethane films, and the weight of the chemical-resistant layer is 15g / m 2 , thickness is 11μm.

[0072] The compounding process is as follows:

[0073] After the load-bearing layer is cleaned and dried for pretreatment, the adhesive layer and the heat-sealing layer are coated on the front and back sides, the lower barrier layer is compounded through the adhesive layer, and then the chemical-resistant layer is compounded with the upper barrier layer. The compounded upper barrier layer is coated with the middle barrier layer and compounded with the lower barrier layer at the same time to obtain the protective fabric.

[0074] After testing, the properties of the fabrics prepared by Examples 1-3 are shown in Table 1:

[0075] Table 1

[0076]

[0077]

[0078] The test data of the fabric performance in Table 1 are obtained by using a fiber tester and other instruments combined with the corresponding national standards. The permeability and liquid pressure penetration performance are based on 30% H 2 O 2 count.

[0079] The above fabric performance test results can prove that the protective fabric provided by the present invention adopts a multi-layer composite structure, has corrosion resistance, oxidation resistance, and disinfection resistance, has good gas-liquid barrier performance and rubbing resistance, and the better the air tightness, the better the protection. And the entire composite fabric has high tensile strength, tear strength and other mechanical properties and wear resistance, excellent resilience and fatigue resistance, nylon fiber has a small density, light weight, and good hygroscopicity, which can enhance the comfort of the wearer. The adhesive layer is used to effectively bond the barrier layer to the load-bearing layer, and the heat sealing layer has the functions of hot melt, flexibility, and wear resistance.

[0080] Obviously, the above embodiments are only examples for clear explanation, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from them are still within the protection scope of the invention.

Claims

1. A protective fabric, adopting a multi-layer composite structure, characterized in that: From the outside to the inside, it includes a chemical-resistant layer, a barrier layer, an adhesive layer, a load-bearing layer and a heat-sealing layer; The load-bearing layer is one of nylon fiber, polyester fiber, aramid fiber, polyarylate fiber, and PBO fiber; The chemical-resistant layer is composed of one or more of polyvinyl chloride, polyester, fluoride resin, polyethylene, and thermoplastic polyurethane elastomer; The barrier layer is composed of an upper barrier layer, a lower barrier layer and an intermediate barrier layer; the lower barrier layer is bonded to the adhesive layer, and the upper barrier layer is bonded to the chemical-resistant layer; The upper barrier layer and the lower barrier layer are both composed of one or more of polyurethane film, polyester film, polyvinyl chloride film, polyvinylidene chloride film, polyvinyl fluoride film, Mylar film, EVOH film, and PET film; The intermediate barrier layer is composed of the following components in parts by mass: 20 to 60 parts of a two-component polyurethane adhesive, 50 to 200 parts of a solvent, 0.01 to 0.3 parts of a curing agent, and 0.1 to 0.5 parts of a light stabilizer; The adhesive layer is composed of the following components in parts by mass: 10 to 40 parts of a single-component polyurethane adhesive and 50 to 100 parts of a solvent; The heat sealing layer is composed of the following components in parts by mass: 10 to 40 parts of a single-component polyurethane adhesive and 50 to 100 parts of a solvent.

2. The protective fabric according to claim 1, characterized in that: The solvent is selected from one or more of butanone, toluene, ethyl acetate, dimethylformamide, and dimethylacetamide.

3. The protective fabric according to claim 1, characterized in that: The light stabilizer is B75, and the curing agent is an amine curing agent.

4. The protective fabric according to claim 1, characterized in that: The chemical resistant layer has a gram weight of 10 g / m 2 ~40g / m 2 , thickness is 10μm~25μm.

5. The protective fabric according to claim 1, characterized in that: The upper barrier layer has a grammage of 40 g / m 2 ~80g / m 2 , thickness is 30μm~60μm.

6. The protective fabric according to claim 1, characterized in that: The weight of the lower barrier layer is 10 g / m 2 ~30g / m 2 , thickness is 10μm~25μm.

7. The protective fabric according to claim 1, characterized in that: The solid content of the intermediate barrier layer is greater than 50%.

8. The protective fabric according to claim 1, characterized in that: The molecular weight of the single-component polyurethane adhesive in the bonding layer is 100,000-500,000, and the solid content is 30%-60%.

9. The protective fabric according to claim 1, characterized in that: The molecular weight of the single-component polyurethane adhesive in the heat-sealing layer is 100,000-500,000, and the solid content is 30%-60%.

10. A protective clothing, characterized in that: The protective fabric is made of the protective fabric described in any one of claims 1 to 9.

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