CN113829703A - Reusable non-woven fabric composite fabric and processing technology - Google Patents

Reusable non-woven fabric composite fabric and processing technology Download PDF

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Publication number
CN113829703A
CN113829703A CN202111086424.0A CN202111086424A CN113829703A CN 113829703 A CN113829703 A CN 113829703A CN 202111086424 A CN202111086424 A CN 202111086424A CN 113829703 A CN113829703 A CN 113829703A
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China
Prior art keywords
fabric
layer
parts
woven fabric
woven
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CN202111086424.0A
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Chinese (zh)
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CN113829703B (en
Inventor
李飞
周永洪
王馨婕
吴烈国
陈玉梅
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Shenghuadun Beijing Protection Technology Co ltd
Swoto Protection and Technology Co Ltd
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Shenghuadun Beijing Protection Technology Co ltd
Swoto Protection and Technology Co Ltd
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    • 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
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/022—Non-woven fabric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D7/00—Producing flat articles, e.g. films or sheets
    • B29D7/01—Films or sheets
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • 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
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/08—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer the fibres or filaments of a layer being of different substances, e.g. conjugate fibres, mixture of different fibres
    • 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
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18—Manufacture of films or sheets
    • 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
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • 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
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0253—Polyolefin fibres
    • 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
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0261—Polyamide fibres
    • B32B2262/0269—Aromatic polyamide fibres
    • 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
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0276—Polyester fibres
    • 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
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/06—Vegetal fibres
    • B32B2262/062—Cellulose fibres, e.g. cotton
    • 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
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/14—Mixture of at least two fibres made of different materials
    • 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
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/306—Resistant to heat
    • B32B2307/3065—Flame resistant or retardant, fire resistant or retardant
    • 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
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/582—Tearability
    • B32B2307/5825—Tear resistant
    • 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
    • B32B2437/00—Clothing
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2323/04—Homopolymers or copolymers of ethene
    • C08J2323/06—Polyethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2497/00—Characterised by the use of lignin-containing materials
    • C08J2497/02—Lignocellulosic material, e.g. wood, straw or bagasse
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
    • Y02P70/62—Manufacturing or production processes characterised by the final manufactured product related technologies for production or treatment of textile or flexible materials or products thereof, including footwear

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Textile Engineering (AREA)
  • Laminated Bodies (AREA)

Abstract

The invention discloses a reusable non-woven fabric composite fabric and a processing technology thereof, the reusable non-woven fabric composite fabric comprises an outer layer fabric and an inner layer fabric, the outer layer fabric comprises two layers of non-woven fabrics, the outer layer fabric non-woven fabric comprises 85-90 parts of polylactide, 5-10 parts of citric acid modified polypropylene ether and 2-6 parts of aramid fiber, an anhydrous adhesive is coated on the surface of at least one layer of non-woven fabric, an excipient is adhered to the surface of the non-woven fabric, and the excipient is sandwiched between the two layers of non-woven fabrics by the adhesion of the two layers of non-woven fabrics and dried. The inner layer fabric comprises a non-woven fabric layer and a polyethylene resin film layer, wherein 70-84 parts by weight of polyethylene resin, 10-15 parts by weight of kapok fiber and 0.5-1 part by weight of lubricant are added into a stirrer to be uniformly stirred and dispersed, then 1-3 parts by weight of a deflocculant and 5-10 parts by weight of a cross-linking agent are added to prepare the polyethylene resin film, and the outer surface of one end of the non-woven fabric layer is coated with the polyethylene resin film layer to obtain the inner layer fabric.

Description

Reusable non-woven fabric composite fabric and processing technology
Technical Field
The invention relates to the field of protective clothing fabrics, in particular to a reusable non-woven fabric composite fabric and a processing technology thereof.
Background
The medical protective clothing is worn by medical workers to isolate germs, harmful ultrafine dust, acidic solution and salt solution and keep the environment clean. PP (polypropylene, accounting for 62 percent of the total number) non-woven fabric material is adopted, and a breathable film special for protective clothing is covered outside, so that the air permeability is strong, and the static electricity is prevented; better permeability resistance, high impact resistance and resistance to corrosion of various organic solvents and acid and alkali. Has strong mechanical property and soft and comfortable texture. No combustion supporting, no toxicity, no irritation and no harm to skin. The medical protective clothing enables medical staff to be used as protective articles for protecting and blocking foreign bacteria, dust and the like. When in contact with a patient, protective clothing is required to be capable of blocking blood, body fluid, spray, bacteria and the like and preventing the penetration of the bacteria and the like. When the fabric of the medical protective clothing is selected in actual use, on one hand, the protective clothing is required to have strong barrier property; on the other hand, the fabric of the protective clothing is required to be breathable and moisture permeable, but the two functions are difficult to be simultaneously obtained.
At present, most of fabrics for preventing chemical reagents only prevent inorganic reagents such as acid and alkali, the fabrics are generally obtained by blending polyester cotton, the impact resistance is not good, and the fabrics have low protection to human bodies when being corroded by organic solvents and various disinfectants. Chinese patent CN201710690507.8 discloses a medical protective clothing fabric and a preparation method thereof, relating to the technical field of textile fabrics. According to the medical protective clothing fabric, the hydrophobic layer is arranged on the base cloth, and the air permeability of the base cloth is not enhanced, so that the fabric is high in hydrostatic pressure, good in barrier property and poor in air permeability.
Therefore, obtaining a reusable fabric for protective clothing that can resist the corrosion of various disinfectants in the medical care environment while maintaining the relevant performance is one of the major challenges that the skilled person needs to solve.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide the reusable non-woven fabric composite fabric which can resist the corrosion of medical disinfectants, meet the sterilization index, maintain good liquid barrier property, and has the advantages of high breaking strength, strong flame retardant property and high breaking elongation.
In order to achieve the purpose, the technical scheme of the invention is that the reusable non-woven fabric composite fabric comprises an outer-layer fabric and an inner-layer fabric, and is characterized in that the outer-layer fabric comprises two layers of non-woven fabrics, 85-90 parts of polylactide, 5-10 parts of citric acid modified polypropylene ether and 2-6 parts of aramid fiber, wherein the surface of at least one layer of non-woven fabric is coated with an anhydrous adhesive, an excipient is adhered to the surface of the non-woven fabric, and the excipient is sandwiched between the two layers of non-woven fabrics by the adhesion of the two layers of non-woven fabrics and then dried; the inner layer fabric comprises a non-woven fabric layer and a polyethylene resin film layer compounded on the outer surface of one end of the non-woven fabric layer in a hot-melting mode, wherein the polyethylene resin film layer is formed by adding 70-84 parts by weight of polyethylene resin, 10-15 parts by weight of kapok fiber and 0.5-1 part by weight of a lubricating agent into a stirrer, uniformly stirring and dispersing, then adding 1-3 parts by weight of a defoaming agent and 5-10 parts by weight of a cross-linking agent into an internal mixer, uniformly mixing in an internal mixer, discharging, feeding into an extrusion calender for rolling to form a film, stretching in a two-way mode, cooling and rolling to form a polyethylene resin film, and compounding through hot-melting, wherein the polyethylene resin film layer is pasted on the outer surface of one end of the non-woven fabric layer, the compounding temperature is 180 DEG and 190 ℃, the pressure is 0.4-0.6MPa, so that the inner layer fabric is obtained, and the outer layer fabric is connected with the polyethylene resin film layer containing layer of the inner layer fabric.
The excipient is almost insoluble in lactic acid, hydrogen peroxide, formalin, and other disinfectant components. The gel can be dispersed and swelled in hot water of 80-90 deg.C, and dissolved rapidly after cooling, the aqueous solution is quite stable at normal temperature, and can be gelled at high temperature, and the gel can be mutually converted with the solution according to the temperature. Has excellent wettability, dispersibility, adhesiveness, thickening property, emulsifying property, water-retaining property and film-forming property, and impermeability to grease. The film formed by the excipient has excellent toughness, flexibility and transparency, is compatible with an emulsifier due to the nonionic property, keeps the liquid barrier property of the material, maintains the stability of mechanical property, and ensures that the solution is stable within the pH range of 2-12.
The preferable technical proposal is that the excipient is one or more of methylcellulose, Arabic gum, polyvidone and polyglycerol stearate.
Preferably, the connection mode of the outer layer fabric and the inner layer fabric containing the polyethylene resin film is needle joint or bonding or hot-press forming connection.
The medical disinfection components comprise lactic acid, formalin, hydrogen peroxide, peroxyacetic acid and the like which are generally corrosive and irritant. The fabric of the protective clothing is adversely affected, the relevant indexes cannot meet the medical standard, the service life of the protective clothing is affected, and further, the protective clothing may be harmful to human bodies. The digesting agent can catalyze the decomposition of residual disinfection components of the fabric under the condition that light energy or electric energy and the like provide energy to form plasma, so that the residual disinfection components are not generated, secondary pollution is avoided, the erosion effect of the digesting agent on the fabric is reduced, the service life of the fabric is prolonged, and the performance is kept stable. The limit of safety to human body is kept while sterilizing.
The preferred disinhibiting agent of the invention is nano titanium loaded on the argil, and the weight of the nano titanium accounts for 5-10% of the argil.
In the present invention, the density of the inner layer fabric nonwoven fabric is preferably 20 to 30g/cm2And the porosity is 70-80%. More preferably 25 to 30g/cm2And the porosity is 70-80%.
The polyethylene is odorless and nontoxic, has a wax-like hand feeling, has excellent service performance and good chemical stability, and can resist corrosion of most of acid and alkali. The polyethylene is very sensitive to environmental stress chemistry and mechanical action, and has poor thermal aging resistance, and the addition of the cross-linking agent can obviously improve the strength, rigidity and heat resistance of a plastic product, so that the product can be used for a long time at about 250 ℃, the waterproof performance of the material is improved, and the water resistance of the polyethylene is improved. Based on the fact that medical disinfection components are all hydrophilic systems, the waterproof performance of the material can better resist the invasion of disinfection components. Meanwhile, too much cross-linking agent is used to make the fabric stiff, and too little cross-linking agent is used to make the cross-linking effect poor.
Preferred crosslinking agents are one or more of N, N-methylenebisacrylamide, divinylbenzene, 1, 4-butanediol diacrylate, triallyl cyanurate, triallylisocyanurate, 1, 6-hexanediol diacrylate, tripropylene glycol diacrylate.
The invention has the advantages and beneficial effects that: the non-woven fabric composite fabric is sterilized by lactic acid, formalin, hydrogen peroxide and peracetic acid for more than 10 times, so that the non-woven fabric composite fabric keeps good liquid barrier property of more than or equal to 3000g/(m2.d), high breaking strength of more than 45N, strong flame retardant property, long afterflame time of less than 4 seconds and high elongation at break of more than or equal to 100 percent. The sterilized invention is subjected to microorganism index detection, the total number of bacterial colonies is less than 20CFU/g, the total number of fungal colonies is less than 20CFU/g, coliform groups, pseudomonas aeruginosa, staphylococcus aureus and hemolytic streptococcus are not detected, and the detection results are negative. The invention has the advantages of low cost of raw materials, obvious cost advantage and stronger application prospect.
Detailed Description
The following further describes embodiments of the present invention with reference to examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
Example 1
The outer-layer fabric comprises two layers of non-woven fabrics, 85 parts of polylactide, 5 parts of citric acid modified polypropylene ether and 2 parts of aramid fiber. Coating anhydrous adhesive on the surface of at least one layer of non-woven fabric, adhering excipient methylcellulose to the surface of the non-woven fabric, laminating the two layers of non-woven fabrics, clamping the excipient between the two layers of non-woven fabrics, and drying by blowing at 50 ℃; the inner fabric comprises a non-woven fabric layer and a polyethylene resin film layer compounded on the outer surface of one end of the non-woven fabric layer in a hot-melting mode, 70 parts of polyethylene resin, 10 parts of kapok fiber and 0.5 part of lubricant in parts by weight are added into a stirrer to be stirred and dispersed uniformly, 1 part of a defoaming agent and 5 parts of an N, N-methylene bisacrylamide crosslinking agent are added to be mixed uniformly in an internal mixer, the mixture is fed into an extrusion calender to be rolled into a film after being discharged, the film is stretched in two directions, cooled and rolled and shaped to obtain the polyethylene resin film, the polyethylene resin film layer is compounded in a hot-melting mode, the polyethylene resin film layer is pasted on the outer surface of one end of the non-woven fabric layer, the temperature is 180 ℃, the pressure is 0.4MPa, and the inner fabric layer fabric is connected with the polyethylene resin film layer containing the inner fabric layer in a needle connection mode.
The reusable non-woven fabric composite fabric is also used for more than 10 times by adopting lactic acid disinfection treatment.
Example 2
The outer-layer fabric comprises two layers of non-woven fabrics, 85 parts of polylactide, 10 parts of citric acid modified polypropylene ether and 6 parts of aramid fiber. Coating anhydrous adhesive on the surface of at least one layer of non-woven fabric, adhering excipient methylcellulose to the surface of the non-woven fabric, laminating the two layers of non-woven fabrics, clamping the excipient between the two layers of non-woven fabrics, and drying by blowing at 55 ℃; the inner fabric comprises a non-woven fabric layer and a polyethylene resin film layer compounded on the outer surface of one end of the non-woven fabric layer in a hot-melting mode, 84 parts of polyethylene resin, 15 parts of kapok fiber and 1 part of lubricant in parts by weight are added into a stirring machine to be uniformly stirred and dispersed, then 3 parts of a defoaming agent and 10 parts of triallyl isocyanurate cross-linking agent are added into the stirring machine to be uniformly mixed in an internal mixer, the mixture is fed into an extrusion calender after being discharged to be rolled into a film, the film is stretched in two directions, cooled and rolled and shaped to obtain the polyethylene resin film, the polyethylene resin film layer is compounded in a hot-melting mode, the polyethylene resin film layer is attached to the outer surface of one end of the non-woven fabric layer, the temperature is 190 ℃, the pressure is 0.6MPa to obtain the inner fabric, and the outer fabric and the inner fabric are connected through the polyethylene resin film layer.
The reusable non-woven fabric composite fabric is further sterilized by formalin for more than 10 times.
Example 3
The outer-layer fabric comprises two layers of non-woven fabrics, 85 parts of polylactide, 8 parts of citric acid modified polypropylene ether and 5 parts of aramid fiber. Coating anhydrous adhesive on the surface of at least one layer of non-woven fabric, adhering excipient methylcellulose to the surface of the non-woven fabric, laminating the two layers of non-woven fabrics, clamping the excipient between the two layers of non-woven fabrics, and drying by blowing at 60 ℃; the inner fabric comprises a non-woven fabric layer and a polyethylene resin film layer compounded on the outer surface of one end of the non-woven fabric layer in a hot-press melting mode, 75 parts of polyethylene resin, 10 parts of kapok fiber and 0.75 part of lubricating agent in parts by weight are added into a stirrer to be stirred and dispersed uniformly, 2 parts of a defoaming agent and 5 parts of 1, 6-hexanediol diacrylate crosslinking agent are added to be mixed uniformly in an internal mixer, the mixture is fed into an extrusion calender to be rolled into a film after being discharged, the film is stretched in two directions, cooled and rolled and shaped to obtain the polyethylene resin film, the polyethylene resin film layer is compounded in the hot-press melting mode, the polyethylene resin film layer is pasted on the outer surface of one end of the non-woven fabric layer, the temperature is 185 ℃, the pressure is 0.5MPa, and the inner fabric layer fabric is connected with the polyethylene resin film layer containing the inner fabric layer in the hot-press forming mode.
The non-woven fabric composite fabric capable of being repeatedly used is further subjected to hydrogen peroxide disinfection treatment for more than 10 times.
Example 4
The outer-layer fabric comprises two layers of non-woven fabrics, 90 parts of polylactide, 8 parts of citric acid modified polypropylene ether and 5 parts of aramid fiber. Coating anhydrous adhesive on the surface of at least one layer of non-woven fabric, adhering excipient methylcellulose to the surface of the non-woven fabric, laminating the two layers of non-woven fabrics, clamping the excipient between the two layers of non-woven fabrics, and drying by blowing at 60 ℃; the inner fabric comprises a non-woven fabric layer and a polyethylene resin film layer compounded on the outer surface of one end of the non-woven fabric layer in a hot-press melting mode, 80 parts by weight of polyethylene resin, 10 parts by weight of kapok fiber and 0.75 part by weight of lubricant are added into a stirrer to be uniformly stirred and dispersed, then 2 parts by weight of a depurating agent and 5 parts by weight of tripropylene glycol diacrylate crosslinking agent are added to be uniformly mixed in an internal mixer, the mixture is fed into an extrusion calender to be rolled into a film after being discharged, the film is stretched in two directions, cooled and rolled and shaped to obtain the polyethylene resin film, the polyethylene resin film layer is compounded in a hot-press melting mode, the polyethylene resin film layer is pasted on the outer surface of one end of the non-woven fabric layer, the temperature is 190 ℃, the pressure is 0.5MPa to obtain the inner fabric, and the outer fabric and the polyethylene resin film layer-containing layer of the inner fabric are connected in a hot-press forming mode.
The reusable non-woven fabric composite fabric is further sterilized by peroxyacetic acid disinfectant for more than 10 times.
Example 5
The outer-layer fabric comprises two layers of non-woven fabrics, 85 parts of polylactide, 8 parts of citric acid modified polypropylene ether and 5 parts of aramid fiber. Coating anhydrous adhesive on the surface of at least one layer of non-woven fabric, adhering excipient methylcellulose to the surface of the non-woven fabric, laminating the two layers of non-woven fabrics, clamping the excipient between the two layers of non-woven fabrics, and drying by blowing at 50 ℃; the inner fabric comprises a non-woven fabric layer and a polyethylene resin film layer compounded on the outer surface of one end of the non-woven fabric layer in a hot-press melting mode, 80 parts of polyethylene resin, 12 parts of kapok fiber and 0.75 part of lubricating agent in parts by weight are added into a stirrer to be uniformly stirred and dispersed, then 3 parts of a defoaming agent and 5 parts of 1, 4-butanediol diacrylate are added to be uniformly mixed in an internal mixer, the mixture is fed into an extrusion calender to be rolled into a film after being discharged, the film is stretched in two directions, cooled and rolled and shaped to obtain the polyethylene resin film, the polyethylene resin film layer is compounded in the hot-press melting mode, the polyethylene resin film layer is pasted on the outer surface of one end of the non-woven fabric layer, the temperature is 190 ℃, the pressure is 0.5MPa, and the inner fabric layer is obtained, and the outer fabric and the polyethylene resin film layer containing the inner fabric layer are connected in the hot-press forming mode.
The reusable non-woven fabric composite fabric is further sterilized by lactic acid disinfectant for more than 10 times.
Comparative example
Comparative example is based on example 1 with the difference that no excipient is included in comparative example 1 and no digesting agent is included in comparative example 2.
1. Results of experiments in which the inventions of examples 1 to 5 and comparative examples were sterilized 10 times or more
Figure BDA0003265706710000071
From the data, it can be seen that the performances of the embodiments 1-5 are still excellent after being sterilized for more than 10 times, and the performances are in accordance with the regulations of GB 19082-2009 medical disposable protective clothing technical requirements. The comparison shows that the performance data of the comparative example 1 without the excipient is obviously reduced, the breaking strength weft direction is only 30N, meanwhile, the comparative example 2 without the digesting agent is not superior to that of the examples, the liquid barrier performance is only 2100g/(m2.d), and the excipient and the digesting agent can be deduced to have a key influence on the performance of the invention.
2. Examples 1-5 invention post-sterilization microbiological indicators
Item Example 1 Example 2 Example 3 Example 4 Example 5 Example 6
Total bacterial colony count CFU/g <20 <20 <20 <20 <20 <20
Coliform group bacteria Not detected out Not detected out Not detected out Not detected out Not detected out Not detected out
Pseudomonas aeruginosa Not detected out Not detected out Not detected out Not detected out Not detected out Not detected out
Staphylococcus aureus Not detected out Not detected out Not detected out Not detected out Not detected out Not detected out
Hemolytic streptococcus Not detected out Not detected out Not detected out Not detected out Not detected out Not detected out
Total number of fungal coloniesCFU/g <20 <20 <20 <20 <20 <20
In conclusion, the invention meets the requirements of adopting lactic acid, formalin, hydrogen peroxide and peracetic acid disinfectant for more than 10 times of disinfection treatment, keeping good liquid barrier property more than or equal to 3000g/(m2.d), high breaking strength more than 45N, strong flame retardant property, long burning time less than 4 seconds, high breaking elongation more than or equal to 100 percent and having cost price advantage. The sterilized invention is subjected to microorganism index detection, the total number of bacterial colonies is less than 20CFU/g, the total number of fungal colonies is less than 20CFU/g, coliform groups, pseudomonas aeruginosa, staphylococcus aureus and hemolytic streptococcus are not detected, and the detection results are negative.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (8)

1. The utility model provides a repeatedly usable's compound surface fabric of non-woven fabrics, includes outer surface fabric and inlayer surface fabric, its characterized in that: the outer-layer fabric comprises two layers of non-woven fabrics, wherein the outer-layer fabric non-woven fabrics comprise 85-90 parts of polylactide, 5-10 parts of citric acid modified polypropylene ether and 2-6 parts of aramid fiber; the inner layer fabric comprises a non-woven fabric layer and a polyethylene resin film layer compounded on the outer surface of one end of the non-woven fabric layer in a hot-pressing and melting mode; the outer layer fabric is connected with the inner layer fabric through the polyethylene resin film layer.
2. The reusable non-woven composite fabric according to claim 1, characterized in that: the connection mode is needle joint or bonding or hot-press forming connection.
3. The process for manufacturing the reusable non-woven fabric composite material according to claim 1, wherein the process comprises the following steps: the outer-layer fabric non-woven fabric is characterized in that at least one layer of non-woven fabric surface is coated with an anhydrous adhesive, an excipient is adhered to the non-woven fabric surface, the two layers of non-woven fabrics are attached to each other, the excipient is clamped between the two layers of non-woven fabrics, and drying is carried out; the processing technology of the inner layer fabric comprises the following steps: adding 70-84 parts of polyethylene resin, 10-15 parts of kapok fiber and 0.5-1 part of lubricant according to the weight part ratio into a stirrer, uniformly stirring and dispersing, then adding 1-3 parts of a depletive and 5-10 parts of a cross-linking agent, uniformly mixing in an internal mixer, taking out sheets, sending the sheets into an extrusion calender for calendering to form a film, stretching in two directions, cooling and rolling for shaping to obtain the polyethylene resin film, compounding by hot melting, and attaching the polyethylene resin film layer on the outer surface of one end of the non-woven fabric, wherein the compounding temperature is 180 DEG and 190 ℃, and the pressure is 0.4-0.6 MPa.
4. The processing technology of the reusable non-woven fabric composite fabric according to claim 3, characterized by comprising the following steps: the excipient is one or more of methylcellulose, acacia, polyvidone and polyglycerol stearate.
5. The processing technology of the reusable non-woven fabric composite fabric according to claim 3, characterized by comprising the following steps: the degerming agent is nano titanium loaded on the argil, and the weight of the nano titanium accounts for 5-10% of the argil.
6. The processing technology of the reusable non-woven fabric composite fabric according to claim 3, characterized by comprising the following steps: the density of the inner layer fabric non-woven fabric is 20-30g/cm2And the porosity is 70-80%.
7. The processing technology of the reusable non-woven fabric composite fabric according to claim 3, characterized by comprising the following steps: the cross-linking agent is one or more of N, N-methylene bisacrylamide, divinyl benzene, 1, 4-butanediol diacrylate, triallyl cyanurate, triallyl isocyanurate, 1, 6-hexanediol diacrylate and tripropylene glycol diacrylate.
8. The processing technology of the reusable non-woven fabric composite fabric according to claim 3, characterized by comprising the following steps: the drying is air blast drying, and the drying temperature is 50-60 ℃.
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