CN115629195A - Preparation method of reusable medical protective clothing fabric - Google Patents
Preparation method of reusable medical protective clothing fabric Download PDFInfo
- Publication number
- CN115629195A CN115629195A CN202211294307.8A CN202211294307A CN115629195A CN 115629195 A CN115629195 A CN 115629195A CN 202211294307 A CN202211294307 A CN 202211294307A CN 115629195 A CN115629195 A CN 115629195A
- Authority
- CN
- China
- Prior art keywords
- fabric
- test
- protective clothing
- medical protective
- fabrics
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 239000004744 fabric Substances 0.000 title claims abstract description 461
- 230000001681 protective effect Effects 0.000 title claims abstract description 66
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 238000005406 washing Methods 0.000 claims abstract description 49
- 238000000034 method Methods 0.000 claims abstract description 33
- 230000004888 barrier function Effects 0.000 claims abstract description 19
- 210000004369 blood Anatomy 0.000 claims abstract description 16
- 239000008280 blood Substances 0.000 claims abstract description 16
- 230000008569 process Effects 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 9
- 210000001124 body fluid Anatomy 0.000 claims abstract description 8
- 239000010839 body fluid Substances 0.000 claims abstract description 8
- 239000002121 nanofiber Substances 0.000 claims abstract description 8
- 239000004642 Polyimide Substances 0.000 claims abstract description 7
- 229920001721 polyimide Polymers 0.000 claims abstract description 7
- 239000004753 textile Substances 0.000 claims abstract description 7
- 239000002131 composite material Substances 0.000 claims abstract description 5
- 239000012528 membrane Substances 0.000 claims abstract description 5
- 229920000728 polyester Polymers 0.000 claims abstract description 5
- 238000012360 testing method Methods 0.000 claims description 143
- 230000035699 permeability Effects 0.000 claims description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 35
- 238000002474 experimental method Methods 0.000 claims description 20
- 230000008859 change Effects 0.000 claims description 19
- 230000002706 hydrostatic effect Effects 0.000 claims description 14
- 238000001914 filtration Methods 0.000 claims description 13
- 230000035515 penetration Effects 0.000 claims description 13
- 239000002245 particle Substances 0.000 claims description 11
- 238000009736 wetting Methods 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 10
- 230000000149 penetrating effect Effects 0.000 claims description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 230000003750 conditioning effect Effects 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 238000005520 cutting process Methods 0.000 claims description 7
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 6
- 239000008367 deionised water Substances 0.000 claims description 6
- 229910021641 deionized water Inorganic materials 0.000 claims description 6
- 238000005507 spraying Methods 0.000 claims description 6
- 230000003068 static effect Effects 0.000 claims description 5
- 230000005611 electricity Effects 0.000 claims description 4
- 230000037303 wrinkles Effects 0.000 claims description 4
- 239000000443 aerosol Substances 0.000 claims description 3
- 238000004364 calculation method Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 239000012153 distilled water Substances 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 238000007589 penetration resistance test Methods 0.000 claims description 3
- 230000000630 rising effect Effects 0.000 claims description 3
- 238000005070 sampling Methods 0.000 claims description 3
- 239000011780 sodium chloride Substances 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 101100008047 Caenorhabditis elegans cut-3 gene Proteins 0.000 claims description 2
- 230000001143 conditioned effect Effects 0.000 claims description 2
- 238000010008 shearing Methods 0.000 claims description 2
- 230000000644 propagated effect Effects 0.000 claims 1
- 244000052616 bacterial pathogen Species 0.000 abstract description 6
- 238000003860 storage Methods 0.000 abstract description 5
- 238000012546 transfer Methods 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000013329 compounding Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 14
- 239000011229 interlayer Substances 0.000 description 9
- 239000004831 Hot glue Substances 0.000 description 5
- 229920000742 Cotton Polymers 0.000 description 4
- 230000003247 decreasing effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000000835 fiber Substances 0.000 description 4
- 230000002829 reductive effect Effects 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 208000015181 infectious disease Diseases 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 230000005587 bubbling Effects 0.000 description 2
- 238000003851 corona treatment Methods 0.000 description 2
- 238000005187 foaming Methods 0.000 description 2
- 239000012982 microporous membrane Substances 0.000 description 2
- 239000013618 particulate matter Substances 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 1
- 241000700605 Viruses Species 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000008263 liquid aerosol Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 238000007719 peel strength test Methods 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 210000004243 sweat Anatomy 0.000 description 1
- 239000011882 ultra-fine particle Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/36—Textiles
- G01N33/367—Fabric or woven textiles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
- B32B37/1207—Heat-activated adhesive
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
- B32B37/1284—Application of adhesive
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/0008—Electrical discharge treatment, e.g. corona, plasma treatment; wave energy or particle radiation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/16—Drying; Softening; Cleaning
- B32B38/162—Cleaning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/16—Drying; Softening; Cleaning
- B32B38/164—Drying
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
- D03D15/20—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads
- D03D15/283—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads synthetic polymer-based, e.g. polyamide or polyester fibres
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
- D03D15/50—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the properties of the yarns or threads
- D03D15/533—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the properties of the yarns or threads antistatic; electrically conductive
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N13/00—Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
- G01N13/04—Investigating osmotic effects
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
- G01N19/04—Measuring adhesive force between materials, e.g. of sealing tape, of coating
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/60—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrostatic variables, e.g. electrographic flaw testing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/30—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
- B32B37/1207—Heat-activated adhesive
- B32B2037/1215—Hot-melt adhesive
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/20—All layers being fibrous or filamentary
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
- B32B2307/21—Anti-static
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
- B32B2307/7145—Rot proof, resistant to bacteria, mildew, mould, fungi
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/726—Permeability to liquids, absorption
- B32B2307/7265—Non-permeable
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/732—Dimensional properties
- B32B2307/734—Dimensional stability
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2437/00—Clothing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2535/00—Medical equipment, e.g. bandage, prostheses or catheter
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2571/00—Protective equipment
-
- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
- D10B2331/04—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyesters, e.g. polyethylene terephthalate [PET]
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0017—Tensile
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Plasma & Fusion (AREA)
- Thermal Sciences (AREA)
- Treatment Of Fiber Materials (AREA)
Abstract
The invention relates to the technical field of medical protective clothing, and discloses a method for preparing reusable medical protective clothing fabric, which comprises the steps of selecting woven antistatic fabric as outer fabric, pure polyester woven filament fabric as inner fabric, polyimide nanofiber membrane as core barrier layer, preparing the reusable medical protective clothing fabric by adopting an off-line double-sided composite process, placing the fabric on a platform before washing, respectively making at least three pairs of marks on warp and weft of the fabric, wherein the distance between each pair of mark points is at least 350mm, the distance between the marks and the edge of the fabric is not less than 50mm, and placing the fabric into a washing machine for machine washing. The preparation method of the reusable medical protective clothing fabric adopts the textile and the microporous barrier film to prepare the novel textile structure material in a compounding way, has the advantages of high technical content, better barrier performance to germs, body fluid and blood, reusability, good mechanical property, easy emergency production transfer, long storage time, low single use cost and the like.
Description
Technical Field
The invention relates to the technical field of medical protective clothing, in particular to a preparation method of a reusable medical protective clothing fabric.
Background
The medical protective clothing is protective clothing worn by medical staff such as doctors, nurses, sanitary cleaning personnel and the like and people entering infected areas such as patients, sick-exploring family members and the like, the medical protective clothing has the main functions of isolating germs, blocking penetration of particles and liquid aerosol, preventing liquid penetration and the like, and the medical staff can effectively prevent virus and harmful particles from invading when wearing the medical protective clothing, thereby greatly reducing the risk of infection.
The medical protective clothing is used as protective clothing for effectively blocking germs, body fluid, blood and harmful ultrafine particles, and is one of the most effective protective equipment for protecting the health of medical care personnel in the infection area. However, most of the medical protective clothing in the current domestic and foreign markets is disposable, although the protective performance is good, the emergency production is extremely difficult, the comfort is extremely poor, the environment is heavily burdened due to the fact that the medical protective clothing cannot be naturally degraded, the requirements on production and storage conditions are high, the medical protective clothing needs to be produced in a clean workshop with the grade of 10 ten thousand or more, the medical protective clothing is sterilized through processes such as ethylene oxide, and the analysis time is long (at least 7-10 days). The prior disposable medical protective clothing fabric is mostly polypropylene (PP) non-woven fabric film-covered fabric, the mechanical property is poor, the material is easy to be scraped, the requirement of violent activity can not be met, because the air permeability and the moisture permeability are poor, the heat and the water vapor inside the disposable medical protective clothing fabric can not be discharged after being worn for a long time, particularly after the high-strength work for several hours, the whole body is soaked by sweat, the wearing comfort is poor, in addition, the prior medical disposable protective clothing fabric can not be naturally degraded, and a large amount of environmental pollution and waste can be easily caused. Data show that medical disposable waste garbage accounts for about 1.9 percent of all urban garbage in the United states, while medical disposable surgical drapes, isolation gowns and protective clothing account for about 0.03 percent of all urban waste garbage, and a large amount of waste increases environmental burden and the use cost of disposable medical protective clothing, so that the development of reusable medical protective clothing fabrics is slow.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a preparation method of a reusable medical protective clothing fabric, which has the advantages of better barrier property to germs, body fluid and blood, reusability, good mechanical property, easy emergency transfer, long storage time, low single use cost and the like, and solves the problems that most of the medical protective clothing on the current domestic and foreign markets are disposable, although the protective performance is better, the emergency transfer is extremely difficult, the comfort is extremely poor and the like.
(II) technical scheme
In order to realize the purposes of better barrier performance to germs, body fluid and blood, reusability, good mechanical property, easy emergency transfer, long storage time, low single use cost and the like, the invention provides the following technical scheme: a preparation method of a reusable medical protective clothing fabric comprises the following steps:
s1, preparing fabric
The reusable medical protective clothing fabric is prepared by using a woven antistatic fabric as an outer layer fabric, a pure polyester woven filament fabric as an inner layer fabric and a Polyimide (PI) nanofiber membrane as a core barrier layer through an offline double-sided composite process.
S2, fabric washing detection
Before washing, the fabric is placed on a platform, at least three pairs of marks are respectively made on the warp and weft of the fabric, the distance between each pair of mark points is at least 350mm, the distance between the mark and the edge of the fabric is not less than 50mm, and the fabric can be washed by a machine after being placed in a washing machine.
S3, testing filtering efficiency of non-oily particles
An automatic filter material tester is adopted to carry out humidifying and experiment on the fabric in the environment with the relative humidity of 30% +/-10% and the temperature of 25 +/-5 ℃, sodium chloride aerosol particles are used for carrying out the experiment, the air flow is set to be 15L/min, the cross section area of the air flow passing through is 100cm & lt 2 & gt, and the average value of the filtering efficiency of at least 3 different parts of the fabric is taken as a test result.
S4, testing hydrostatic pressure resistance
The fabric subjected to humidifying is clamped by a textile hydrostatic pressure resistance tester, the front surface of the fabric is in contact with the water surface, continuously increasing water pressure is applied to the fabric at a water pressure rising rate of 6.0kPa/min, the water seepage phenomenon is observed, the hydrostatic pressure value of the fabric at the moment when a third water drop just appears is recorded, and the hydrostatic pressure average value of 5 pieces of fabric is taken as a test result.
S5, synthetic blood penetration resistance test
A medical protective clothing synthetic blood penetration tester is adopted to observe whether macroscopic liquid penetration occurs or not, so as to determine the resistance of the material of the protective clothing to the penetration of blood and body fluid.
S6, testing surface moisture resistance
At least three pieces of fabric are cut from different parts of the fabric, the surface of the fabric is as flat as possible, the size of each piece of fabric is at least 180mm multiplied by 180mm, the fabric is arranged on an annular clamp holder, the clamp holder is kept at 45 degrees to the horizontal, the center position of the fabric is away from the lower part of a nozzle by a certain distance, a certain amount of experimental water (deionized water or distilled water) is used for spraying the fabric, after spraying, the wetting grade of the fabric is determined by comparing the appearance of the fabric with the wetting phenomenon description and pictures, and the surface moisture resistance of the fabric is evaluated according to the wetting grade.
S7, testing antistatic performance
A roller friction tester is adopted, a friction device is started, the temperature is raised to (60 +/-10) ° C, the fabric is placed into the friction device, the operation is carried out for 15min, after the operation is finished, the fabric is taken out from the friction device (the fabric needs to be taken out by wearing insulating gloves) and put into a Faraday cylinder, a charged charge value measuring device reads a charge value, the fabric is more than 300mm away from an object outside the Faraday cylinder in the operation process, the charged quantity of the fabric is measured by the Faraday cylinder, 5 times of operation are repeated, an average value is taken as a test result, the unit of the charge quantity is micro coulomb (mu C), standing is carried out for 10min each time, and a static electricity eliminator is used for eliminating the fabric and standard cloth in a rotary drum.
S8, testing air permeability
The method comprises the steps of adopting a full-automatic fabric air permeability tester, setting the experimental area to be 20cm & lt 2 & gt and the pressure drop to be 100Pa, clamping the fabric on a fabric round table, avoiding the cloth edges and the wrinkle parts at the test points, adopting enough tension to enable the fabric to be flat and not to deform when the fabric is clamped, starting the tester to enable the pressure drop to be gradually close to a specified value for 1min or reach a stable value, recording the airflow flow, and repeatedly measuring different parts of the same fabric for at least 10 times under the same condition to obtain an average value as a test result.
S9, moisture permeability test
A fabric moisture permeability instrument is adopted, at least three circular fabrics with the diameter of 70mm are cut for each fabric, the humidity conditioning balance of the fabrics is carried out for at least 6 hours under the standard atmosphere with the temperature of 20 +/-2 ℃ and the relative humidity of 65 +/-4%, the temperature of a test box is set to be 20 +/-2 ℃ and the relative humidity of 90 +/-2%, the moisture permeability experiment test time is set to be 1 hour, then the weight change of a moisture permeable cup is weighed and calculated, the moisture permeability of the fabrics is calculated according to a formula, and the average value of the moisture permeability of the three fabrics is taken as a test result.
S10, peeling Strength test
An electronic fabric strength machine is adopted to respectively cut 3 pieces of fabric with the width of (50 +/-0.5) mm and the length of more than 150mm in the warp direction and the weft direction of the fabric, the fabric is cut at a position which is more than 10cm away from the fabric edge, the stretching speed of the machine is set to be 100mm/min, the spacing distance of the clamps is 50mm, the clamping surfaces of the upper clamp and the lower clamp are positioned on the same plane of a tension axis, so that the fabric is not twisted when being stripped, two ends of the stripped fabric are respectively clamped in the two clamps, the tester is started to begin stripping, the fabric is stretched to be completely separated, the average stripping strength in the stripping process is recorded, and the result is reserved to one position behind a decimal point.
S11, fracture Strength test
An electronic fabric strength machine is adopted, 5 fabrics are respectively taken from each fabric in the warp direction and the weft direction, the inner diameter of each fabric is 50mm +/-0.5 mm, the length of each fabric can meet the distance length of 200mm, the fabric is subjected to humidity adjustment for 24 hours under the standard atmosphere of temperature (20 +/-2) DEG C and relative humidity (65 +/-4)% before experiment, the distance of an instrument is set to be 200mm, the stretching speed is 100mm/min, the pulling force value is set to be 10N, and the average value of the breaking strength in the warp direction and the weft direction is calculated as a test result.
S12, tear Strength test
An electronic fabric strength machine is adopted, the fabric size is 75 +/-1 mm multiplied by 150 +/-2 mm, a sample plate is used for drawing an isosceles trapezoid on each fabric, a notch with the length of 15mm is prepared, 5 fabrics are respectively cut in the warp direction and the weft direction of each fabric, the fabric is subjected to humidity conditioning for at least 6 hours at the temperature of 20 +/-2 ℃ and the relative humidity of 65 +/-4% of standard atmosphere before an experiment, the distance between clamps is set to be 25mm, the stretching speed is 100mm/min, the pulling force value is 5N, and the average value of the tearing strength in the warp direction and the weft direction is calculated as a test result.
S13, puncture resistance testing
The method comprises the steps of penetrating a test steel nail through the fabric at a constant speed (100 +/-10) mm/min by using an electronic fabric strength tester, stopping the test if the top extension height of the test steel nail is 25mm after the test steel nail is contacted with the fabric, sequentially testing each fabric, recording the maximum force required by penetrating the fabric, wherein the unit is Newton (N), shearing at least 4 round fabrics with the diameter of not less than 50mm from each fabric, humidifying the fabric for 6 hours at the temperature (20 +/-2) DEG C and the relative humidity (65 +/-4)% in standard atmosphere before the test, and taking the average value of the maximum penetrating force of the 4 fabrics as a test result.
S14, preparation of bulk
After the tests of S2 to S12 are carried out, a large amount of reusable medical protective clothing fabrics are prepared.
Preferably, in step S2, the marks are uniformly distributed on the fabric, the distance between two mark points is measured by using a ruler, and the size change rate of each piece of fabric after washing is calculated according to a standard formula, wherein the size change rate D is calculated according to the following formula:
in the formula, x0 is the original size of the fabric, and x1 is the size of the fabric after washing.
Preferably, in step S4, the fabric is pretreated for 6 hours at a temperature of (20 ± 2) ° c and a relative humidity of (65 ± 4)% standard atmosphere before the test to achieve a heat-moisture equilibrium, test deionized water is used for the test, the water temperature is kept at (20 ± 2) ° c, the water pressure rising rate is set to 6.0kPa/min, the test area is 100cm2, at least 5 pieces of the fabric are sampled from different parts of the fabric, and the size of the fabric is not less than 15cm × 15cm.
Preferably, in step S6, the fabric is conditioned for 4 hours at a temperature of 20 ± 2 ℃ and a relative humidity of 65 ± 4% in standard atmosphere before the test.
Preferably, in step S7, the fabric is washed as required before the test, and dried at 50 ℃, and then the fabric is balanced for at least 6 hours under the conditions of temperature (20 ± 2) ° c, relative humidity (35 ± 5)%, and ambient wind speed of 0.1 m/S.
Preferably, in step S9, the moisture permeability WVT is calculated by the following formula:
wherein WVT is the moisture permeability, g/(m 2 & h) or g/(m 2 & 24 h); Δ M is the difference between two measurements of the same moisture permeation test assembly in grams (g); delta M is the difference of the two times of weighing of the moisture permeable assembly of the blank fabric, and the unit is gram (g); when no blank test is performed, Δ M =0; a is effective test area, 0.00283m2; t is the test time in hours (h).
Preferably, in step S10, a trapezoidal sampling method is adopted during cutting to ensure that two sides of the fabric in the length direction are parallel to the yarns, so as to avoid cutting the same warp yarns or weft yarns from the fabric in the same direction as much as possible, the fabric is peeled by about 50mm in advance in the length direction of the fabric before the experiment, and the fabric is subjected to humidity conditioning for at least 6 hours at a temperature of (20 ± 2) ° c and a relative humidity of (65 ± 4)% in standard atmosphere before the experiment.
Preferably, in step S11, the breaking strength test principle is to stretch the fabric with a predetermined size at a constant stretching speed until the fabric breaks, and the unit of the maximum force required for the tensile breaking of the fabric is newtons (N).
Preferably, in step S12, the tearing strength test principle is to draw a trapezoid on the fabric, clamp two non-parallel edges of the trapezoid with a clamp of a strength tester, apply continuously increasing force to the fabric to make the tear propagate along the width direction of the fabric, and measure the average maximum tearing force, which is newton (N).
Preferably, in step S13, the anti-puncture performance test principle is to place the fabric and the fabric clamp rings on a strength tester, and firmly clamp the fabric between the clamp rings so that the outer surface of the fabric faces the test nail.
(III) advantageous effects
Compared with the prior art, the invention provides the preparation method of the reusable medical protective clothing fabric, which has the following beneficial effects:
1. according to the preparation method of the reusable medical protective clothing fabric, the reusable medical protective clothing fabric is a novel textile structure material prepared by compounding textiles and microporous barrier films, and has the advantages of high technical content, better barrier performance to germs, body fluid and blood, reusability, good mechanical property, easy emergency transfer, long storage time, low single use cost and the like.
2. According to the preparation method of the reusable medical protective clothing fabric, the novel reusable medical protective clothing fabric subjected to three-prevention one-resistance treatment is excellent and stable in appearance condition, inter-bonding performance, size stability, particulate matter protection performance, liquid protection performance, antistatic performance and comfort performance after being washed for 20 times, and the reusable medical protective clothing fabric is more than 20 times and is one of ideal fabrics for preparing reusable medical protective clothing.
Drawings
FIG. 1 shows the washed appearances of fabrics D1 and D2;
FIG. 2 shows the washed appearances of the fabrics E1 and E2;
fig. 3 is a microscopic observation image of the fabric F1 before and after surface washing.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
a preparation method of a reusable medical protective clothing fabric comprises the following steps:
s1, preparing fabric
The reusable medical protective clothing fabric is prepared by using a woven antistatic fabric as an outer layer fabric, a pure polyester woven filament fabric as an inner layer fabric and a Polyimide (PI) nanofiber membrane as a core barrier layer through an offline double-sided composite process.
S2, fabric washing detection
The fabric is placed on a platform before washing, at least three pairs of marks are respectively made on the warp and weft of the fabric, the distance between each pair of mark points is at least 350mm, the mark distance from the edge of the fabric is not less than 50mm, the fabric can be washed by a washing machine after being placed in the washing machine, the marks are uniformly distributed on the fabric, the distance between the two mark points is measured by a ruler, the size change rate of each piece of fabric after washing can be obtained by calculation according to a formula on a standard, and the size change rate D is calculated according to the following formula:
in the formula, x0 is the original size of the fabric, and x1 is the size of the fabric after washing.
S3, testing filtering efficiency of non-oily particles
An automatic filter material tester is adopted to carry out humidifying and experiment on the fabric in the environment with the relative humidity of 30% +/-10% and the temperature of 25 +/-5 ℃, sodium chloride aerosol particles are used for carrying out the experiment, the air flow is set to be 15L/min, the cross section area of the air flow passing through is 100cm & lt 2 & gt, and the average value of the filtering efficiency of at least 3 different parts of the fabric is taken as a test result.
S4, testing hydrostatic pressure resistance
The fabric subjected to humidity conditioning is clamped by a textile hydrostatic pressure resistance tester, the front surface of the fabric is in contact with the water surface, continuously increasing water pressure is applied to the fabric at a water pressure increasing rate of 6.0kPa/min, a water seepage phenomenon is observed, a hydrostatic pressure value when water drops at the third position on the fabric just appear is recorded, a hydrostatic pressure average value of 5 pieces of fabric is taken as a test result, the fabric is pretreated for 6 hours at a temperature of (20 +/-2) DEG C and a relative humidity of (65 +/-4)% standard atmosphere before testing to achieve heat-humidity balance, test deionized water is used for testing, the water temperature is kept at (20 +/-2) DEG C, the water pressure increasing rate is set to 6.0kPa/min, a test area is 100cm & lt 2 & gt, at least 5 pieces of fabric are sampled from different positions of the fabric, and the size of the fabric is not less than 15cm multiplied by 15cm.
S5, synthetic blood penetration resistance test
A medical protective clothing synthetic blood penetration tester is adopted to observe whether macroscopic liquid penetration occurs or not, so as to determine the resistance of the material of the protective clothing to the penetration of blood and body fluid.
S6, testing surface moisture resistance
At least three fabrics are cut from different parts of the fabric, the surface of the fabric is as flat as possible, the size of each fabric is at least 180mm multiplied by 180mm, the fabric is arranged on an annular clamp holder, the clamp holder is kept at 45 degrees with the horizontal plane, the center position of the fabric is away from the lower part of a nozzle by a certain distance, a certain amount of experimental water (deionized water or distilled water) is used for spraying the fabric, after spraying, the wetting grade of the fabric is determined through description of the appearance of the fabric and the wetting phenomenon and picture comparison, the surface wetting resistance of the fabric is evaluated according to the wetting grade, and the humidity of the fabric is adjusted for 4 hours under the standard atmosphere of temperature (20 +/-2) DEG C and relative humidity (65 +/-4)% before testing.
S7, testing antistatic performance
A roller friction tester is adopted, a friction device is started, the temperature is raised to (60 +/-10) ° C, the fabric is placed into the friction device, the operation is carried out for 15min, after the operation is finished, the fabric is taken out from the friction device (the fabric needs to be taken out by wearing insulating gloves) and put into a Faraday cylinder, a charged charge value is read by a charged charge measuring device, the fabric is more than 300mm away from an object except the Faraday cylinder in the operation process, the charged quantity of the fabric is measured by the Faraday cylinder, 5 times of operation are repeated, the average value is taken as a test result, the unit of micro coulomb (mu C) is obtained, the fabric is kept still for 10min each time, a static eliminating device is used for eliminating the fabric and standard cloth in a rotary drum, the fabric is washed according to requirements before the test, the fabric is dried at 50 ℃, and then the fabric is balanced for at the temperature of (20 +/-2) ° C, the relative humidity of (35 +/-5)%, and the ambient wind speed of 0.1m/s for at least 6h.
S8, testing air permeability
The method comprises the steps of adopting a full-automatic fabric air permeability tester, setting the experimental area to be 20cm & lt 2 & gt and the pressure drop to be 100Pa, clamping the fabric on a fabric round table, avoiding the cloth edges and the wrinkle parts at the test points, adopting enough tension to enable the fabric to be flat and not to deform when the fabric is clamped, starting the tester to enable the pressure drop to be gradually close to a specified value for 1min or reach a stable value, recording the airflow flow, and repeatedly measuring different parts of the same fabric for at least 10 times under the same condition to obtain an average value as a test result.
S9, moisture permeability test
A fabric moisture permeability measuring instrument is adopted, at least three circular fabrics with the diameter of 70mm are cut for each fabric, the humidity conditioning balance of the fabrics is carried out for at least 6 hours under the standard atmosphere with the temperature of (20 +/-2) DEG C and the relative humidity of (65 +/-4)% for at least 6 hours, the temperature of a test box is set to be (20 +/-2) DEG C and the relative humidity of (90 +/-2)%, the moisture permeability test time is set to be 1 hour, then the weight change of a moisture permeable cup is weighed and calculated, the moisture permeability of the fabrics is calculated according to a formula, the average value of the moisture permeability of the three fabrics is taken as a test result, and the calculation formula of the moisture permeability WVT is as follows:
wherein WVT is the moisture permeability, g/(m 2 & h) or g/(m 2 & 24 h); Δ M is the difference between two measurements of the same moisture permeation test assembly in grams (g); delta M is the difference of the two times of weighing of the moisture permeable assembly of the blank fabric, and the unit is gram (g); when no blank test is performed, Δ M =0; a is effective test area, 0.00283m2; t is the test time in hours (h).
S10, peeling Strength test
The method comprises the steps of cutting 3 pieces of fabric with the width of (50 +/-0.5) mm and the length of more than 150mm in the warp direction and the weft direction of the fabric respectively by an electronic fabric strength machine, cutting the fabric at the position above 10cm away from the fabric edge, setting the stretching speed of an instrument to be 100mm/min, setting the spacing distance of a clamp to be 50mm, enabling the clamping surfaces of an upper clamp and a lower clamp to be on the same plane of a tension axis to ensure that the fabric does not twist during stripping, clamping two ends of the stripped fabric in the two clamps respectively, starting a tester, starting stripping, stretching the fabric to be completely separated, recording the average stripping strength in the stripping process, keeping the result to one bit behind a decimal point, adopting a trapezoidal sampling method during cutting to ensure that two sides of the fabric in the length direction are parallel to yarns, avoiding cutting the same warp yarns or weft yarns from the fabric in the same direction as much as possible, opening the fabric in the length direction of the experiment fabric by 50mm in advance, and humidifying the front edge of the experiment at the temperature of (20 +/-2) DEG C and the relative humidity (65 +/-4) under the standard atmosphere for at least 6h before the experiment.
S11, fracture Strength test
An electronic fabric strength tester is adopted to respectively take 5 fabrics in the warp direction and the weft direction from each fabric, the inner diameter of each fabric is 50mm +/-0.5 mm, the length of each fabric can meet the gauge length of 200mm, the fabrics are subjected to humidity conditioning for 24h under the standard atmosphere of temperature (20 +/-2) DEG C and relative humidity (65 +/-4)% before experiment, the gauge length of an instrument is set to be 200mm, the stretching speed is 100mm/min, the pulling force value is set to be 10N, the average value of the breaking strength in the warp direction and the weft direction is calculated as a test result, the breaking strength test principle is that the fabric with the specified size is stretched at a constant stretching speed until breaking, and the maximum force value required when the test fabric is in tensile breaking is newton (N).
S12, tear Strength test
An electronic fabric strength tester is adopted, the size of a fabric is 75 +/-1 mm multiplied by 150 +/-2 mm, an isosceles trapezoid is drawn on each fabric through a sample plate, a cut with the length of 15mm is prepared, 5 fabrics are sheared in the warp direction and the weft direction of each fabric, the fabric is subjected to humidifying for at least 6 hours under the temperature of 20 +/-2 ℃ and the relative humidity of 65 +/-4% standard atmosphere before the experiment, the distance between clamps is set to be 25mm, the stretching speed is 100mm/min, the pulling force value is 5N, the average value of the tearing strength in the warp direction and the weft direction is calculated as a test result, the tearing strength test principle is that a trapezoid is drawn on the fabric, two unparallel edges on the trapezoid are clamped through a clamp of a strength tester, continuously increased force is applied to the fabric, the tearing is enabled to propagate along the width direction of the fabric, and the average maximum tearing force is measured, and the unit is Newton (N).
S13, puncture resistance testing
The method comprises the steps of penetrating a test steel nail through fabric at a constant speed (100 +/-10) mm/min by using an electronic fabric strength tester, if the test nail is contacted with the fabric and the top extension height of the test steel nail cannot penetrate the fabric until the test nail reaches 25mm, terminating the test, sequentially testing each fabric, recording the maximum force required by penetrating the fabric, wherein the unit is Newton (N), each fabric is at least sheared into 4 round fabrics with the diameter of not less than 50mm, the fabric is subjected to humidifying for 6h under the conditions of temperature (20 +/-2) DEG C and relative humidity (65 +/-4)% standard atmosphere before the test, and the average value of the maximum penetrating force of the 4 fabrics is taken as a test result.
S14, preparation of bulk
After the tests of S2 to S12 are carried out, a large amount of reusable medical protective clothing fabric is prepared.
Example two:
according to S2, the fabrics D1, D2, E1, E2 and F1 are respectively subjected to 5 times, 10 times and 20 times of washing tests, the average size change rate of the fabrics is respectively tested and is listed in the table 1, and the appearance after washing is shown in the figure 1.
TABLE 1 Fabric size Change Rate test results
As can be seen from Table 1, the washed dimensional change rates of the 5 fabrics are all in the range of-5.0% to 5.0%, the dimensional stability of the fabrics D2 and E2 is the best, the dimensional stability of the fabrics D1 and E1 is relatively poor, and the dimensional stability of the fabric F1 is the worst. The fabric D2 and the fabric E2 are thicker, the yarn density of the outer fabric is high, the texture structure is stable, the fabrics are firmly compounded, the size change rate is smaller, the fabric D1 is thinner, the yarn density is lower, the yarns shrink after washing, the texture structure of the fabrics is tighter, and the size change rate is larger. The fabric E1 is also light and thin, has less composite sizing amount, has larger bubbles after being washed, and has delamination to a certain degree, so the size change rate is also larger. The yarn density of the fabric F1 is low, and the barrier film on the washed surface is damaged, so that the fabric tissue structure is looser, the gaps among yarns are increased, and the size change rate is maximum.
Further observation shows that the appearances of the fabrics D1 and D2 are not changed significantly after 5 times and 10 times of washing, sporadic small bubbles appear on the surface of D1 after 20 times of washing (as shown in fig. 1a, the left image is a macroscopic observation image, and the right image is a local microscopic observation image), and the D2 surface slightly wrinkles (as shown in fig. 1 b), so that the corona discharge treatment is performed on the outer layer fabric to enhance the adhesion between the nanofiber film and the outer layer fabric, but the outer layer antistatic fabric is a filament fabric with a smooth surface and has a high yarn arrangement density, and during the compounding process, the hot melt adhesive is still difficult to enter the interior of the filament and the filament gaps, so that a firm connection point is difficult to form, and the interlayer bonding force between the nanofiber film and the outer layer fabric in a dry state is good, but the interlayer bonding force in a wet state (washing) is poor, so that the bubbling phenomenon is generated after washing.
After the fabric E1 is washed for 10 times, more bubbles appear on the surface of the fabric and are distributed densely (as shown in figure 2 a), larger and continuous bubbles appear after 20 times of washing (as shown in figure 2 b), a certain interlayer separation phenomenon appears in the middle of the fabric, and the appearance of the fabric E2 is not changed obviously after 20 times of washing (as shown in figure 2 c).
In order to further study the change rule of the interlayer bonding performance of the washed fabrics D1, D2, E1 and E2, the washing stripping strength of the four fabrics is tested, and the test results are shown in Table 2:
table 2 peel strength test results of fabrics
As shown in table 2 and fig. 2, after 20 washes, the peel strength of the fabric E1 decreased most, the peel strength of the fabrics D1, D2, and E2 decreased relatively less, and the peel strength of the fabric E2 decreased least. Therefore, the fabric E1 has the largest decrease in interlayer bonding performance after washing, poorer washing resistance, the fabric E2 has the best interlayer bonding performance, and the performance after washing is still very stable.
The reason is deeply analyzed, mainly because the outer layer fabric of the fabric E1 is sparse, the low-hot-melt-viscosity hot melt adhesive is easy to penetrate through yarns and enter gaps of fabrics, but after the three-prevention one-resistance finishing, a waterproof and oil-proof layer is formed on the surface of fibers, so that the binding force between the hot melt adhesive and the fibers is reduced, and then the bonding performance between a nanofiber membrane and the fabric is continuously reduced after the washing treatment for many times, and the interlayer separation phenomenon occurs on the local part of the fabric, so that the large-area foaming phenomenon occurs on the surface of the washed fabric. The fabric E2 outer layer fabric is prepared from polyester cotton short fiber yarns, and the fabric surface has a plurality of fiber ends and is easy to form good bonding with hot melt adhesive after being subjected to corona discharge treatment; in addition, the gaps among the yarns in the polyester-cotton fabric are large, the hot melt adhesive is easy to enter the polyester-cotton fabric, a good mechanical anchoring effect is formed, and the interlayer bonding force is good, so that although the polyester-cotton fabric is washed for multiple times, the interlayer bonding performance of the nanofiber film and the fabric is still good, the surface of the washed fabric is smooth, and no foaming phenomenon occurs.
After the fabric F1 is washed for 5 times, although no obvious bubbling phenomenon exists, microscopic observation shows (as shown in figure 3), partial yarns of the fabric F1 are broken after washing, the yarns are exposed on the surface of the fabric, gaps among the yarns are enlarged, and the integral tissue structure of the fabric is obviously more random than that of the fabric before washing, so that the hand feeling of the fabric after washing is obviously rougher, and the size change rate of the fabric after washing is larger, so that the yarn structure is looser.
In order to further explore the change of the microscopic morphology, a small piece of fabric is cut before and after the fabric F1 is washed and is placed under a microscope for observation, as can be seen from figure 3, after the fabric F1 is washed for 5 times, the barrier film is seriously broken, the yarn arrangement is more disordered, and gaps among yarns are larger, so that the barrier film is easily damaged due to the fact that the fabric F1 adopts a double-sided film covering mode, the barrier film is exposed outside and directly impacted by water flow, and the fabrics are continuously subjected to friction and stress after being washed and stirred for many times. Therefore, the barrier film of the fabric F1 is poor in stability and can be reused for only 5 times.
The non-oily particulate filtering efficiency of the fabrics D1, D2, E1, E2 and F1 is respectively tested, and the surface layer PTFE microporous membrane of the fabric F1 is obviously damaged after 5 times of washing, so that the particulate protection performance of the fabric F subjected to 5 times of washing is only tested and analyzed. The test results are shown in table 3:
TABLE 3 filtration efficiency test results
As can be seen from the experimental data in table 3, the filtration efficiencies of the fabrics D1, D2, E1, E2 are relatively stable, and the experimental data have relatively small fluctuation; the filtering efficiency of the fabric F1 is very unstable, the filtering efficiency of the fabric F1 to non-oily particles is obviously reduced after 5 times of washing, and the filtering efficiency is far less than the requirement that the filtering efficiency is more than 70%. This is because the barrier film of the face fabric F1 is broken after 5 washes, resulting in a sharp decrease in the protective effect against particulate matter. After the fabrics D1, D2, E1 and E2 are washed, the barrier film is not obviously damaged, so that the protection effect on particles is stable.
The results of hydrostatic pressure resistance, synthetic blood penetration resistance and surface moisture resistance tests on the fabrics D1, D2, E1, E2 and F1 are shown in fig. 4, 5 and 6.
TABLE 4 hydrostatic pressure resistance test results
TABLE 5 results of the anti-synthetic blood penetration test
TABLE 6 results of surface moisture resistance test
From the experimental data in tables 4, 5 and 6, it can be known that the fabric E2 has the most stable liquid protective performance, the performance reduction after washing is relatively small, the fabric can still meet the relevant requirements after 20 times of washing, and the fabric F1 has the worst liquid protective performance. The fabric E2 is firmly compounded, and after the three-prevention one-resistance aftertreatment, the liquid protection performance of the fabric is improved to a certain extent, and after the F1 is washed for 5 times, the barrier film of the fabric is broken, so that liquid can easily penetrate through the surface of the fabric, and the liquid protection performance is obviously reduced.
For the medical protective clothing, the poor antistatic performance can cause the adsorption of particles in the air, influence the cleanliness of the medical protective clothing and increase the infection probability of patients; static electricity may affect the accuracy of the operation of medical compact electronic equipment, and fire and explosion may be caused when flammable and combustible gas is encountered; in addition, static electricity causes a strong uncomfortable feeling when the medical staff wears the clothes for a long time. Therefore, it is necessary to evaluate the antistatic performance of medical protective clothing.
The results of the antistatic performance tests of fabrics D1, D2, E1, E2, and F1 are shown in table 7:
table 7 charged charge amount test results
From the experimental data in table 7, it can be seen that the antistatic performance of fabric D2 is the best, fabric D1 and fabric E2 are the second, fabric F1 is poorer, and fabric E1 is the worst. The anti-static fabric has good anti-static performance because the outer layer fabrics of D1, D2 and E2 are anti-static fabrics, and conductive wires are embedded in the fabrics in warp and weft directions, the interval between the conductive wires of the fabric D2 is 2.5mm, the interval between the conductive wires of the fabric D1 and the conductive wires of the fabric E2 is 10mm, and the density of the conductive wires of the fabric D2 is higher, so that the anti-static performance of the fabric D2 is best. The fabric F1 is only embedded with conductive wires in the warp direction, the density of the conductive wires is low, the conductive wires are positioned in the PTFE microporous membrane, and the antistatic performance is limited; the conductive yarn is not embedded in the outer fabric of the fabric E1, and although the fabric is subjected to antistatic after-treatment, the improvement on the antistatic performance is still limited. And thus the antistatic property is the worst.
The test results of the air permeability and the moisture permeability of the fabrics D1, D2, E1, E2 and F1 are shown in tables 5-8 and 5-9.
TABLE 8 test results of air permeability
TABLE 9 moisture vapor transmission rate test results
From the experimental data in tables 8 and 9, it can be known that the air permeability and moisture permeability of the fabrics D1, D2, E1 and E2 are not changed much after washing, wherein the air permeability and moisture permeability of the fabric E2 are relatively good, and the performance after washing is more stable. The air permeability of the fabric F1 after washing is increased rapidly, and the performance is unstable, because the yarn density of the fabric F1 is the minimum, the barrier film is cracked after washing, the fabric texture structure is looser than before washing, gaps among yarns are enlarged, and therefore the air permeability is increased greatly.
The tensile breaking strength test results of the fabrics D1, D2, E1, E2, and F1 are shown in table 10.
TABLE 10 breaking Strength test results
After washing, the tensile breaking strengths of fabrics D1, D2, E2 increased, while the tensile breaking strengths of fabrics E1, F1 decreased, all to the level 5 requirement.
TABLE 11 grading of tensile breaking Strength
The results of the puncture resistance tests on the fabrics D1, D2, E1, E2, and F1 are shown in table 12.
TABLE 12 puncture resistance test results
TABLE 13 grading of puncture resistance
As can be seen from tables 12 and 13, the puncture strengths of the fabrics D1, D2, E1, E2, and F1 all exceeded the requirement of level 2, with the fabrics D2 and E2 meeting the requirement of level 3.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A preparation method of a reusable medical protective clothing fabric is characterized by comprising the following steps:
s1, preparing fabric
The method is characterized in that a woven antistatic fabric is selected as an outer layer fabric, a pure polyester woven filament fabric is selected as an inner layer fabric, a Polyimide (PI) nanofiber membrane is selected as a core barrier layer, and an offline double-sided composite process is adopted to prepare the reusable medical protective clothing fabric.
S2, fabric washing detection
Before washing, the fabric is placed on a platform, at least three pairs of marks are respectively made on the warp direction and the weft direction of the fabric, the distance between each pair of mark points is at least 350mm, the distance between the mark and the edge of the fabric is not less than 50mm, and the fabric can be washed by a washing machine after being placed in the washing machine.
S3, testing filtering efficiency of non-oily particles
An automatic filter material tester is adopted to carry out humidifying and experiment on the fabric in the environment with the relative humidity of 30% +/-10% and the temperature of 25 +/-5 ℃, sodium chloride aerosol particles are used for carrying out the experiment, the air flow is set to be 15L/min, the cross section area of the air flow passing through is 100cm & lt 2 & gt, and the average value of the filtering efficiency of at least 3 different parts of the fabric is taken as a test result.
S4, testing hydrostatic pressure resistance
The fabric subjected to humidifying is clamped by a textile hydrostatic pressure resistance tester, the front surface of the fabric is in contact with the water surface, continuously and gradually increased water pressure is applied to the fabric at a water pressure rising rate of 6.0kPa/min, the water seepage phenomenon is observed, the hydrostatic pressure value of the fabric at the moment when a third water drop just appears is recorded, and the hydrostatic pressure average value of 5 pieces of fabric is taken as a test result.
S5, synthetic blood penetration resistance test
A medical protective clothing synthetic blood penetration tester is adopted to observe whether macroscopic liquid penetration occurs or not, so as to determine the resistance of the material of the protective clothing to the penetration of blood and body fluid.
S6, testing surface moisture resistance
At least three pieces of fabric are cut from different parts of the fabric, the surface of the fabric is as flat as possible, the size of each fabric is at least 180mm multiplied by 180mm, the fabric is arranged on an annular clamp holder, the clamp holder and the horizontal plane are kept at 45 degrees, the center position of the fabric is away from the lower part of a nozzle by a certain distance, a certain amount of experimental water (deionized water or distilled water) is used for spraying the fabric, after spraying, the wetting grade of the fabric is determined through the description of the appearance of the fabric and the wetting phenomenon and the comparison of pictures, and the surface wetting resistance of the fabric is evaluated according to the wetting grade.
S7, testing antistatic performance
A roller friction tester is adopted, a friction device is started, the temperature is raised to (60 +/-10) ° C, the fabric is placed into the friction device, the operation is carried out for 15min, after the operation is finished, the fabric is taken out from the friction device (the fabric needs to be taken out by wearing insulating gloves) and put into a Faraday cylinder, a charged charge value measuring device reads a charge value, the fabric is more than 300mm away from an object outside the Faraday cylinder in the operation process, the charged quantity of the fabric is measured by the Faraday cylinder, 5 times of operation are repeated, an average value is taken as a test result, the unit of the charge quantity is micro coulomb (mu C), standing is carried out for 10min each time, and a static electricity eliminator is used for eliminating the fabric and standard cloth in a rotary drum.
S8, testing air permeability
The method comprises the steps of adopting a full-automatic fabric air permeability tester, setting the experimental area to be 20cm & lt 2 & gt and the pressure drop to be 100Pa, clamping the fabric on a fabric round table, avoiding the cloth edges and the wrinkle parts at the test points, adopting enough tension to enable the fabric to be flat and not to deform when the fabric is clamped, starting the tester to enable the pressure drop to be gradually close to a specified value for 1min or reach a stable value, recording the airflow flow, and repeatedly measuring different parts of the same fabric for at least 10 times under the same condition to obtain an average value as a test result.
S9, moisture permeability test
A fabric moisture permeability measuring instrument is adopted, at least three circular fabrics with the diameter of 70mm are sheared from each fabric, the humidity regulation balance of the fabrics is carried out for at least 6h under the standard atmosphere with the temperature of (20 +/-2) DEG C and the relative humidity of (65 +/-4)% for setting the temperature of a test box to be (20 +/-2) DEG C and the relative humidity to be (90 +/-2)%, and the moisture permeability test time to be 1h, then the weight change of a moisture permeable cup is weighed and calculated, the moisture permeability of the fabrics is calculated according to a formula, and the average value of the moisture permeability of the three fabrics is taken as the test result.
S10, peeling Strength test
An electronic fabric strength machine is adopted to respectively cut 3 pieces of fabric with the width of (50 +/-0.5) mm and the length of more than 150mm in the warp direction and the weft direction of the fabric, the fabric is cut at a position more than 10cm away from the fabric edge, the stretching speed of the machine is set to be 100mm/min, the spacing distance of the clamping devices is set to be 50mm, the clamping surfaces of the upper clamping device and the lower clamping device are positioned on the same plane of a tension axis, so that the fabric is not twisted when stripped, two ends of the stripped fabric are respectively clamped in the two clamping devices, the tester is started to begin stripping, the fabric is stretched to be completely separated, the average stripping strength in the stripping process is recorded, and the result is reserved to one bit behind a decimal point.
S11, fracture Strength test
An electronic fabric strength machine is adopted, 5 fabrics are respectively taken from each fabric in the warp direction and the weft direction, the inner diameter of each fabric is 50mm +/-0.5 mm, the length of each fabric can meet the distance length of 200mm, the fabric is subjected to humidity adjustment for 24 hours under the standard atmosphere of temperature (20 +/-2) DEG C and relative humidity (65 +/-4)% before experiment, the distance of an instrument is set to be 200mm, the stretching speed is 100mm/min, the pulling force value is set to be 10N, and the average value of the breaking strength in the warp direction and the weft direction is calculated as a test result.
S12, tear Strength test
An electronic fabric strength machine is adopted, the fabric size is 75 +/-1 mm multiplied by 150 +/-2 mm, a sample plate is used for drawing an isosceles trapezoid on each fabric, a notch with the length of 15mm is prepared, 5 fabrics are respectively cut in the warp direction and the weft direction of each fabric, the fabric is subjected to humidity conditioning for at least 6 hours at the temperature of 20 +/-2 ℃ and the relative humidity of 65 +/-4% of standard atmosphere before an experiment, the distance between clamps is set to be 25mm, the stretching speed is 100mm/min, the pulling force value is 5N, and the average value of the tearing strength in the warp direction and the weft direction is calculated as a test result.
S13, puncture resistance testing
The method comprises the steps of penetrating a test steel nail through the fabric at a constant speed (100 +/-10) mm/min by using an electronic fabric strength tester, stopping the test if the top extension height of the test steel nail is 25mm after the test steel nail is contacted with the fabric, sequentially testing each fabric, recording the maximum force required by penetrating the fabric, wherein the unit is Newton (N), shearing at least 4 round fabrics with the diameter of not less than 50mm from each fabric, humidifying the fabric for 6 hours at the temperature (20 +/-2) DEG C and the relative humidity (65 +/-4)% in standard atmosphere before the test, and taking the average value of the maximum penetrating force of the 4 fabrics as a test result.
S14, preparation in bulk
After the tests of S2 to S12 are carried out, a large amount of reusable medical protective clothing fabric is prepared.
2. The method for preparing the reusable medical protective clothing fabric as claimed in claim 1, wherein in the step S2, the marks are uniformly distributed on the fabric, the distance between two mark points is measured by a ruler, the size change rate after each piece of fabric is washed can be obtained by calculation according to a standard formula, and the size change rate D is calculated according to the following formula:
in the formula, x0 is the original size of the fabric, and x1 is the size of the fabric after washing.
3. The method for preparing a reusable medical protective clothing fabric as claimed in claim 1, wherein in step S4, the fabric is pretreated for 6h under standard atmosphere of temperature (20 ± 2 ℃) and relative humidity (65 ± 4%) to achieve heat and humidity balance before testing, test deionized water is used for testing, the water temperature is kept at (20 ± 2 ℃) and the water pressure rise rate is set at 6.0kPa/min, the test area is 100cm2, at least 5 pieces are sampled from different parts of the fabric, and the size of the fabric is not less than 15cm x 15cm.
4. The method for preparing the reusable medical protective clothing fabric as claimed in claim 1, wherein in the step S6, the fabric is conditioned for 4 hours at a temperature of 20 plus or minus 2 ℃ and a relative humidity of 65 plus or minus 4% in a standard atmosphere before testing.
5. The method for preparing the reusable medical protective clothing fabric as claimed in claim 1, wherein in the step S7, the fabric is washed as required before the test, and dried at 50 ℃, and then the fabric is balanced for at least 6 hours under the conditions of temperature (20 ± 2) ° c, relative humidity (35 ± 5)%, and ambient wind speed of 0.1 m/S.
6. The method for preparing the reusable medical protective clothing fabric as claimed in claim 1, wherein in the step S9, the moisture permeability WVT is calculated according to the following formula:
wherein WVT is the moisture permeability, g/(m 2 & h) or g/(m 2 & 24 h); Δ M is the difference between two measurements of the same moisture permeation test assembly in grams (g); delta M is the difference of the two-time weighing of the moisture-permeable assembly of the blank fabric, and the unit is gram (g); when no blank test is performed, Δ M =0; a is effective test area, 0.00283m2; t is the test time in hours (h).
7. The method for preparing the reusable medical protective clothing fabric as claimed in claim 1, wherein in the step S10, a trapezoidal sampling method is adopted during cutting to ensure that two sides of the fabric in the length direction are parallel to the yarns, the fabric in the same direction is prevented from being cut into the same warp yarns or weft yarns as much as possible, the fabric is peeled off by about 50mm in advance in the length direction of the fabric before an experiment, and the fabric is subjected to humidity conditioning for at least 6 hours in standard atmosphere with the temperature of (20 ± 2) ° c and the relative humidity of (65 ± 4)% before the experiment.
8. The method for preparing the reusable medical protective clothing fabric as claimed in claim 1, wherein in the step S11, the breaking strength test principle is that the fabric with the specified size is stretched at a constant stretching speed until the fabric is broken, and the maximum force value required for the test fabric to break under tension is in newtons (N).
9. The method for preparing the reusable medical protective clothing fabric as claimed in claim 1, wherein in the step S12, the tearing strength test principle is that a trapezoid is drawn on the fabric, two non-parallel edges of the trapezoid are clamped by a clamp of a strength tester, continuously increased force is applied to the fabric, the tearing is propagated along the width direction of the fabric, and the average maximum tearing force is measured, and the unit is Newton (N).
10. The method for preparing the reusable medical protective clothing fabric as claimed in claim 1, wherein in the step S13, the puncture resistance test principle is that the fabric and the fabric clamping rings are placed on a strength tester, the fabric is firmly clamped between the clamping rings, and the outer surface of the fabric faces towards the test nails.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211294307.8A CN115629195A (en) | 2022-10-21 | 2022-10-21 | Preparation method of reusable medical protective clothing fabric |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211294307.8A CN115629195A (en) | 2022-10-21 | 2022-10-21 | Preparation method of reusable medical protective clothing fabric |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115629195A true CN115629195A (en) | 2023-01-20 |
Family
ID=84906477
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211294307.8A Withdrawn CN115629195A (en) | 2022-10-21 | 2022-10-21 | Preparation method of reusable medical protective clothing fabric |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115629195A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116793901A (en) * | 2023-08-23 | 2023-09-22 | 江苏蓝格卫生护理用品有限公司 | Protective performance analysis method and system for medical protective clothing |
| CN118424936A (en) * | 2024-07-01 | 2024-08-02 | 江苏唐盛纺织科技有限公司 | Method and device for testing dry-wet wear resistance of textile product |
-
2022
- 2022-10-21 CN CN202211294307.8A patent/CN115629195A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116793901A (en) * | 2023-08-23 | 2023-09-22 | 江苏蓝格卫生护理用品有限公司 | Protective performance analysis method and system for medical protective clothing |
| CN116793901B (en) * | 2023-08-23 | 2023-11-10 | 江苏蓝格卫生护理用品有限公司 | Protective performance analysis method and system for medical protective clothing |
| CN118424936A (en) * | 2024-07-01 | 2024-08-02 | 江苏唐盛纺织科技有限公司 | Method and device for testing dry-wet wear resistance of textile product |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN115629195A (en) | Preparation method of reusable medical protective clothing fabric | |
| JP5213495B2 (en) | Medical laminated fabric, medical drape using the same, and medical clothing using the same | |
| KR101569554B1 (en) | Ptfe fabric articles and methods of making same | |
| CN112297550B (en) | Packaging material for sterilization | |
| CN107532349A (en) | Cloth and silk | |
| CN112030361B (en) | Soft medical surgical gown SMS non-woven fabric and preparation method thereof | |
| US20170362745A1 (en) | Copolymer membranes, fibers, products and methods | |
| CN112210888B (en) | Polylactic acid elastic non-woven material beneficial to tissue regeneration and preparation method thereof | |
| CN111660639A (en) | Medical protective clothing fabric | |
| EP3574971B1 (en) | Bag filter fabric and production method therefor | |
| JP2008006664A (en) | Laminated knitted fabric for medical application, surgical gown using it, surgical material using it | |
| TW201827210A (en) | Laminated nonwoven fabric | |
| WO2023058516A1 (en) | Multilayer nonwoven fabric, method for producing same, and protective garment | |
| KR20050026553A (en) | Chintzed stretch fabrics | |
| CN116005356A (en) | Micro-nano overlapped bio-based fiber material and preparation method and application thereof | |
| Kanafchian et al. | Fabrication of nanostructured and multicompartmental fabrics based on electrospun nanofibers | |
| CN113677238B (en) | Regenerated cellulose fiber nonwoven fabric, sheet impregnated with chemical solution, and mask | |
| US12017442B2 (en) | Nonwoven fabric for sterilization packaging material | |
| TWI573906B (en) | Elastic nonwoven fabric and method for producing thereof | |
| KR100750458B1 (en) | Method of preparing stretchable nonwoven using elastic knit or woven fabric and side-panel and waist band applying the stretchable nonwoven or stretchable fabric | |
| CN112391735A (en) | Non-woven fabric for cosmetics | |
| JP2019172348A (en) | Nonwoven fabric for sterilization packaging material having peeling aptitude | |
| JP2000062060A (en) | Medical covering material | |
| CN116811387A (en) | Antistatic unidirectional moisture-conducting medical protective clothing fabric and preparation method thereof | |
| JP2008308772A (en) | Fabric |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20230120 |