CN111705516A - Waterproof flame-retardant composite fabric for outdoor protective cover and preparation process thereof - Google Patents

Waterproof flame-retardant composite fabric for outdoor protective cover and preparation process thereof Download PDF

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Publication number
CN111705516A
CN111705516A CN202010525662.6A CN202010525662A CN111705516A CN 111705516 A CN111705516 A CN 111705516A CN 202010525662 A CN202010525662 A CN 202010525662A CN 111705516 A CN111705516 A CN 111705516A
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Prior art keywords
flame
retardant
fabric
layer
polyurethane adhesive
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CN202010525662.6A
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Chinese (zh)
Inventor
夏仁伟
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Kunshan Hengtai Composite Technology Co ltd
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Kunshan Hengtai Composite Technology Co ltd
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Priority to CN202010525662.6A priority Critical patent/CN111705516A/en
Publication of CN111705516A publication Critical patent/CN111705516A/en
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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
    • D06N3/0013—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using multilayer webs
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/02—Non-macromolecular additives
    • C09J11/04—Non-macromolecular additives inorganic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
    • C09J175/04—Polyurethanes
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
    • D06N3/0006—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using woven fabrics
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
    • D06N3/0015—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using fibres of specified chemical or physical nature, e.g. natural silk
    • D—TEXTILES; PAPER
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    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
    • D06N3/0015—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using fibres of specified chemical or physical nature, e.g. natural silk
    • D06N3/0025—Rubber threads; Elastomeric fibres; Stretchable, bulked or crimped fibres; Retractable, crimpable fibres; Shrinking or stretching of fibres during manufacture; Obliquely threaded fabrics
    • D06N3/0027—Rubber or elastomeric fibres
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    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
    • D06N3/0015—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using fibres of specified chemical or physical nature, e.g. natural silk
    • D06N3/0034—Polyamide fibres
    • D—TEXTILES; PAPER
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    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
    • D06N3/0015—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using fibres of specified chemical or physical nature, e.g. natural silk
    • D06N3/0036—Polyester fibres
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0043—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by their foraminous structure; Characteristics of the foamed layer or of cellular layers
    • D06N3/0054—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by their foraminous structure; Characteristics of the foamed layer or of cellular layers obtained by mechanical perforations
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/04—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D06N3/047—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds with fluoropolymers
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/12—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
    • D06N3/14—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N2201/00—Chemical constitution of the fibres, threads or yarns
    • D06N2201/02—Synthetic macromolecular fibres
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
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    • D06N2201/00—Chemical constitution of the fibres, threads or yarns
    • D06N2201/04—Vegetal fibres
    • D06N2201/042—Cellulose fibres, e.g. cotton
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N2201/00—Chemical constitution of the fibres, threads or yarns
    • D06N2201/04—Vegetal fibres
    • D06N2201/042—Cellulose fibres, e.g. cotton
    • D06N2201/045—Lignocellulosic fibres, e.g. jute, sisal, hemp, flax, bamboo
    • D—TEXTILES; PAPER
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    • D06N2209/00—Properties of the materials
    • D06N2209/06—Properties of the materials having thermal properties
    • D06N2209/067—Flame resistant, fire resistant
    • D—TEXTILES; PAPER
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    • D06N2209/00—Properties of the materials
    • D06N2209/12—Permeability or impermeability properties
    • D06N2209/121—Permeability to gases, adsorption
    • D06N2209/123—Breathable
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    • D06N2209/00—Properties of the materials
    • D06N2209/12—Permeability or impermeability properties
    • D06N2209/126—Permeability to liquids, absorption
    • D06N2209/128—Non-permeable
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    • D06N2211/00—Specially adapted uses
    • D06N2211/12—Decorative or sun protection articles
    • D06N2211/28—Artificial leather

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Laminated Bodies (AREA)

Abstract

The invention discloses a waterproof flame-retardant composite fabric for an outdoor protective cover, which comprises at least two flame-retardant fabric layers, wherein a flame-retardant adhesive layer is clamped and bonded between every two adjacent flame-retardant fabric layers; the surface of the flame-retardant fabric layer positioned on the outer side surface is provided with a TPU micropore film layer, wherein the flame-retardant fabric layer is formed by interweaving pre-oxidized fiber and non-pre-oxidized fiber, the flame-retardant adhesive layer is prepared from polyurethane adhesive containing halogen-free flame retardant and thermal expansion microspheres, and a plurality of micropores distributed at intervals are formed on the TPU micropore film layer. The composite fabric has excellent self flame retardant property, the flame retardant property of the composite fabric cannot lose effectiveness gradually along with the use time, and the composite fabric layer has waterproof property and certain air permeability.

Description

Waterproof flame-retardant composite fabric for outdoor protective cover and preparation process thereof
Technical Field
The invention relates to a composite fabric and a preparation process thereof, in particular to a waterproof flame-retardant composite fabric for an outdoor protective cover and a preparation process thereof, and belongs to the technical field of functional protective fabrics for outdoor equipment and processing thereof.
Background
The large-scale equipment required by factory and field operation is mostly directly exposed and placed in an open-air operation field, and the operation is directly carried out when the construction is convenient. When the equipment placed in the open air is placed outdoors for a long time, the change of weather, such as rain and snow weather, high-temperature weather and the like, needs to be dealt with, so that a protective cover is required to be covered outside the equipment for protecting the equipment from being wetted by rain and snow and being exposed to high temperature; meanwhile, due to the fact that the equipment is placed in a grounding mode, the ground is wet after rain and snow pass, and water vapor is easy to gather in the protective cover, so that the equipment is wet; in addition, many of the large-scale equipment is electric equipment, so that the protective cover used by the large-scale equipment is required to have certain flame retardance.
Most of the existing common outdoor protective covers only have dustproof and waterproof functions or have certain flame retardant functions, and a waterproof layer and a flame retardant layer are coated on the inner layer and/or the outer layer of a fabric layer for the protective covers, so that the outdoor protective covers have the waterproof and flame retardant functions. However, after the protective cover is used for a long time, the coating on the surface of the protective cover is easy to fall off and lose efficacy, so that the corresponding function of the protective cover is lost; meanwhile, the protective cover is generally poor in air permeability in order to have good waterproof performance, and water vapor is easily accumulated in the inner layer of the protective cover so as to make the equipment wet. There is therefore a need for a composite fabric suitable for use in protective coverings for outdoor equipment that has superior water resistance, flame retardant properties, and breathability over extended periods of use.
Disclosure of Invention
In order to solve the technical problems, the invention provides the waterproof flame-retardant composite fabric for the outdoor protective cover and the preparation process thereof.
The technical scheme of the invention is as follows:
the invention discloses a waterproof flame-retardant composite fabric for an outdoor protective cover, which takes a covering surface as an inner side surface and an exposed surface as an outer side surface when in use, and comprises at least two flame-retardant fabric layers, wherein a flame-retardant adhesive layer is clamped and bonded between the two adjacent flame-retardant fabric layers; a TPU microporous film layer is arranged on the surface of the flame-retardant fabric layer positioned on the outer side surface;
the flame-retardant fabric layer is formed by interweaving pre-oxidized fiber and non-pre-oxidized fiber, the pre-oxidized fiber accounts for 60-75 wt% of the flame-retardant fabric layer, and the balance is non-pre-oxidized fiber;
the flame-retardant adhesive layer is prepared from a polyurethane adhesive containing a halogen-free flame retardant and thermal expansion microspheres, wherein the halogen-free flame retardant accounts for 3-5 wt% of the total mass of the polyurethane adhesive, and the thermal expansion microspheres account for 1-2 wt% of the total mass of the polyurethane adhesive;
wherein a plurality of micropores are formed on the TPU microporous film layer at intervals, the pore diameter of each micropore is 20-30 μm, and the pore distance between two adjacent micropores is 45-60 μm.
The further technical scheme is as follows:
the pre-oxidized fiber is polyacrylonitrile fiber subjected to pre-oxidation treatment, and the non-pre-oxidized fiber is at least one of cotton-hemp blended fiber, polyester fiber (terylene), polyamide fiber (chinlon) and spandex fiber.
The further technical scheme is as follows:
the halogen-free flame retardant used in the flame-retardant adhesive layer is a phosphorus-containing flame retardant, and the used thermal expansion microspheres are akzonobel thermal expansion microspheres; a plurality of micropores which are arranged at intervals and have the aperture of 10-20 mu m are formed on the formed flame-retardant adhesive layer.
The further technical scheme is as follows:
the phosphorus-containing flame retardant is at least one of triphenyl phosphate, tricresyl phosphate, cresyl diphenyl phosphate, trixylenyl phosphate, tris- (2,4, 6-trimethylphenyl) phosphate, tris- (2, 4-di-tert-butylphenyl) phosphate, tris- (2, 6-di-tert-butylphenyl) phosphate, resorcinol bis- (diphenyl phosphate), hydroquinone bis- (diphenyl phosphate), bisphenol A bis (diphenyl phosphate), resorcinol bis (2, 6-di-tert-butylphenyl) phosphate and hydroquinone bis (2, 6-dimethylphenyl) phosphate.
The further technical scheme is as follows:
the polyurethane adhesive mainly comprises the following components in percentage by mass of the total mass of the polyurethane adhesive: 3-5 wt.% of a halogen-free flame retardant, 1-2 wt.% of thermal expansion microspheres and the balance of an emulsion type polyurethane adhesive, wherein the used emulsion type polyurethane adhesive is a conventional emulsion type polyurethane adhesive sold on the market, and is not repeated in the application.
The further technical scheme is as follows:
the TPU microporous film layer is formed on the surface of the fabric layer by components mainly comprising TPU resin particles, polytetrafluoroethylene and an ester solvent through a melting process, a casting process and a needle rolling process, wherein the mass ratio of the TPU resin particles to the polytetrafluoroethylene to the ester solvent is (25-30): (6-7): 1.
The further technical scheme is as follows:
the ester solvent is one of dioctyl adipate, dibutyl adipate and dihexyl adipate.
The invention also discloses a preparation method of the waterproof flame-retardant composite fabric for the outdoor protective cover, which comprises the following steps:
s1: obtaining a flame-retardant fabric layer by weaving pre-oxidized fiber and non-pre-oxidized fiber;
s2: sequentially adding a halogen-free flame retardant and thermal expansion microspheres into the emulsion type polyurethane adhesive, and continuously stirring for 2-3h at the stirring speed of 1000-1500r/min to obtain the polyurethane adhesive;
s3: after the polyurethane adhesive is coated on the surfaces of the flame-retardant fabric layers positioned between the two adjacent flame-retardant fabric layers and on the outer side surfaces, the fabric layers coated with the polyurethane adhesive are heated and pre-dried for 8-10min at the temperature of 100-110 ℃, and then cooled;
s4: mixing TPU resin particles, polytetrafluoroethylene and an ester solvent in proportion, carrying out stirring reaction at the temperature of 110-115 ℃ for 30-35min, and plasticizing the obtained product at the temperature of 130-140 ℃ to obtain a plasticized TPU mixture;
s5: and (3) carrying out casting coating on the plasticized TPU mixture in the step S4 on the surface of the fabric layer coated with the polyurethane adhesive in the step S3 through a casting process, and then forming a TPU microporous film layer on the surface of the fabric layer through a needle rolling process.
The further technical scheme is as follows:
the casting process adopts 110-DEG C120-DEG C infrared pre-drying, and the casting coating amount is 1000-DEG C1200 g/m2。
The beneficial technical effects of the invention are as follows:
1. the pre-oxidized fiber used in the flame-retardant fabric layer of the composite fabric is pre-oxidized polyacrylonitrile fiber, the polyacrylonitrile fiber is oxidized in air at 200-300 ℃ to form black fiber with a partial cyclization structure, the limiting oxygen index is 40-60, the decomposition temperature is higher than 640 ℃, the black fiber has heat resistance and flame retardance, and no solution drop is generated when meeting fire, the fabric layer formed by mixing and interweaving the pre-oxidized fiber and conventional non-pre-oxidized fiber and/or synthetic fiber has good flame retardance, and the flame retardance of the composite fabric can be enhanced fundamentally;
2. the adhesive layer used for bonding the two adjacent flame-retardant fabric layers and the TPU microporous film layer contains the halogen-free flame retardant, so that the adhesive has a bonding effect and also has flame retardant performance, and the condition that the flame retardant performance is invalid when a conventional flame-retardant coating is positioned on the surface of the fabric layer can not be generated because the adhesive is positioned between the two fabric layers;
3. the adhesive layer used for bonding the two adjacent flame-retardant fabric layers and the TPU microporous film layer contains thermal expansion microspheres, the thermal expansion microspheres are microspheres containing low-boiling-point substances such as isobutane, propane and pentane in the outer shell of the thermoplastic polymer, and the microspheres can enable the gas in the microspheres to seep out of the outer shell after being heated at a corresponding temperature (such as 100-110 ℃) so as to generate micropores with the diameter of 10-20 mu m in the adhesive layer, and the formed micropores have a certain ventilation function;
4. the TPU microporous film of the composite fabric is formed on the surface of the fabric layer by adopting the combined action of TPU resin particles, polytetrafluoroethylene and an ester solvent through a melting process, a casting process and a needle rolling process, micropores with the aperture of 20-30 mu m are formed on the film, the TPU and the polytetrafluoroethylene used by the TPU microporous film have certain waterproof performance, and simultaneously the micropores formed on the film have certain ventilation function, and simultaneously agglomerated water molecules cannot permeate the whole composite fabric layer from the micropores, so that the composite fabric has the waterproof function and the ventilation performance.
In conclusion, the composite fabric has excellent self flame retardant property, and meanwhile, the flame retardant property of the composite fabric cannot be gradually lost along with the use time; and the composite fabric layer has certain air permeability while having waterproof performance.
Detailed Description
In order to clearly understand the technical means of the present invention and to implement the technical means according to the content of the specification, the following embodiments are further described in detail in the following, which are used for illustrating the present invention and are not used to limit the scope of the present invention. The raw materials which are not mentioned in the following specific examples are all conventional raw materials which are sold on the market, and can be selected by a person skilled in the art according to requirements; meanwhile, the process parameters which are not mentioned are all the conventional process parameters in the field, and are not described in detail in the following specific embodiments.
Detailed description of the preferred embodiment 1
S1: obtaining a flame-retardant fabric layer by using pre-oxidized polyacrylonitrile fibers and PET fibers in a weaving mode, wherein the content of the pre-oxidized polyacrylonitrile fibers is 70 wt.%, and the content of the PET fibers is 30 wt.%;
s2: 4 wt.% of phosphorus-containing flame retardant (triphenyl phosphate) and 1.5 wt.% of thermal expansion microspheres (akzonobel) are sequentially added into a commercially available conventional emulsion type polyurethane adhesive, and the mixture is continuously stirred for 2 to 3 hours at the stirring speed of 1000-;
s3: after the polyurethane adhesive is coated on the surfaces of the flame-retardant fabric layers positioned between the two adjacent flame-retardant fabric layers and on the outer side surfaces, the fabric layers coated with the polyurethane adhesive are heated and pre-dried for 8-10min at the temperature of 100-110 ℃, and then cooled;
s4: mixing TPU resin particles, polytetrafluoroethylene and dioctyl adipate according to the mass ratio of 25:6:1, carrying out stirring reaction at the temperature of 110-;
s5: after the plasticized TPU mixture in the step S4 is subjected to casting coating on the surface of the fabric layer on the side coated with the polyurethane adhesive in the step S3 through a casting process, a TPU microporous film layer is formed on the surface of the fabric layer through a needle rolling process, wherein the casting process adopts 110-120 ℃ infrared pre-drying, and the casting coating amount is 1000-1200g/m2。
Specific example 2
S1: obtaining a flame-retardant fabric layer by weaving polyacrylonitrile fibers and PA6 fibers which are subjected to preoxidation treatment, wherein the content of the polyacrylonitrile fibers subjected to preoxidation treatment is 60 wt.%, and the content of the PET fibers is 40 wt.%;
s2: sequentially adding 5 wt.% of phosphorus-containing flame retardant (formed by mixing tris- (2,4, 6-trimethylphenyl) phosphate and tricresyl phosphate according to a pattern mass ratio of 1: 2) and 2.0 wt.% of thermal expansion microspheres (akzonobel) into a commercially available conventional emulsion type polyurethane adhesive, and continuously stirring at a stirring speed of 1000-1500r/min for 2-3h to obtain the polyurethane adhesive;
s3: after the polyurethane adhesive is coated on the surfaces of the flame-retardant fabric layers positioned between the two adjacent flame-retardant fabric layers and on the outer side surfaces, the fabric layers coated with the polyurethane adhesive are heated and pre-dried for 8-10min at the temperature of 100-110 ℃, and then cooled;
s4: mixing TPU resin particles, polytetrafluoroethylene and dihexyl adipate according to the mass ratio of 30:6.5:1, stirring and reacting at the temperature of 110-115 ℃ for 30-35min, and plasticizing the obtained product at the temperature of 130-140 ℃ to obtain a plasticized TPU mixture;
s5: the plasticized TPU mixture in the step S4 is subjected to tape casting coating on the surface of the fabric layer on the side coated with the polyurethane adhesive in the step S3 through a tape casting process, and then a TPU microporous film layer is formed on the surface of the fabric layer through a needle rolling process, wherein the tape casting process adopts 110-120 ℃ infrared pre-drying, and the tape casting coating amount is 1100g/m2。
Specific example 3
S1: obtaining a flame-retardant fabric layer by weaving polyacrylonitrile fibers and PA66 fibers which are subjected to preoxidation treatment, wherein the content of the polyacrylonitrile fibers subjected to preoxidation treatment is 75 wt.%, and the content of the PET fibers is 25 wt.%;
s2: sequentially adding 3 wt.% of phosphorus-containing flame retardant (resorcinol bis (2, 6-di-tert-butylphenyl) phosphate) and 1.0 wt.% of thermal expansion microspheres (akzonobel) into a commercially available conventional emulsion type polyurethane adhesive, and continuously stirring at a stirring speed of 1000-;
s3: after the polyurethane adhesive is coated on the surfaces of the flame-retardant fabric layers positioned between the two adjacent flame-retardant fabric layers and on the outer side surfaces, the fabric layers coated with the polyurethane adhesive are heated and pre-dried for 8-10min at the temperature of 100-110 ℃, and then cooled;
s4: mixing TPU resin particles, polytetrafluoroethylene and dioctyl adipate according to the mass ratio of 28:7:1, carrying out stirring reaction at the temperature of 110-;
s5: after the plasticized TPU mixture in the step S4 is subjected to tape casting coating on the surface of the fabric layer on the side coated with the polyurethane adhesive in the step S3 through a tape casting process, a TPU microporous film layer is formed on the surface of the fabric layer through a needle rolling process, wherein the tape casting process adopts 110-120 ℃ infrared pre-drying, and the tape casting coating amount is 1200g/m2。
Comparative example 1:
steps S1, S2, S3 and S5 are the same as in embodiment 1 except that the operation of step S4 is performed using only TPU resin particles in the raw material for preparing the TPU mixture in step S4, without using polytetrafluoroethylene and dioctyl adipate.
Comparative example 2:
steps S1, S3, S4 and S5 are the same as in embodiment 1, except that no thermally expandable microspheres are used in the raw material for preparing the polyurethane adhesive in step S2, and the other operations are the same as in step S2.
Comparative example 3:
steps S1, S3, S4 and S5 are the same as in embodiment 1, except that no halogen-free flame retardant is used in the raw material for preparing the polyurethane adhesive in step S2, and the other operations are the same as in step S2.
Comparative example 4:
steps S2, S3, S4 and S5 are the same as in embodiment 1 except that a fabric layer is obtained by weaving using PET fibers in step S1.
The composite fabric prepared by the method is tested for flame retardant performance, waterproof performance and air permeability, wherein the flame retardant performance is tested according to a method described in CPAI-84:1995, the waterproof performance is tested according to a moisture absorption method in a textile fabric moisture permeability test method GB/T12704, 1-2009, and the air permeability is tested according to a test method specified in GB/T5453-8 by adopting a digital air permeability instrument, and the test results are described in the following table 1.
Table 1 test results of flame retardant, waterproof, and air permeability performances of composite fabrics of specific examples and comparative examples
Figure RE-GDA0002611335620000071
As can be seen from table 1, the composite fabric prepared by the method of the present application has excellent flame retardancy, and simultaneously has good air permeability and water resistance; the TPU microporous film of comparative example 1 does not use polytetrafluoroethylene and dioctyl adipate, and the composite fabric has poor waterproofness and air permeability; the flame-retardant adhesive layer of the comparative example 2 does not use thermal expansion micropores, and the air permeability of the composite fabric is poor; the halogen-free flame retardant is not used in the flame-retardant adhesive layer in the comparative example 3, so that the flame retardant property of the composite fabric is poor; the fabric layer of comparative example 4 was woven from only conventional PET fibers, and the resulting composite fabric had poor flame retardancy and had instances of dropping or dripping continuing to burn.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, it should be noted that, for those skilled in the art, many modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims (9)

1. The utility model provides an outdoor protection casing is with waterproof fire-retardant compound surface fabric to the covering surface is the medial surface when using, and the exposed surface is the lateral surface, its characterized in that: the fabric comprises at least two flame-retardant fabric layers, wherein a flame-retardant adhesive layer is clamped and bonded between two adjacent flame-retardant fabric layers; a TPU microporous film layer is arranged on the surface of the flame-retardant fabric layer positioned on the outer side surface;
the flame-retardant fabric layer is formed by interweaving pre-oxidized fiber and non-pre-oxidized fiber, the pre-oxidized fiber accounts for 60-75 wt% of the flame-retardant fabric layer, and the balance is non-pre-oxidized fiber;
the flame-retardant adhesive layer is prepared from a polyurethane adhesive containing a halogen-free flame retardant and thermal expansion microspheres, wherein the halogen-free flame retardant accounts for 3-5 wt% of the total mass of the polyurethane adhesive, and the thermal expansion microspheres account for 1-2 wt% of the total mass of the polyurethane adhesive;
wherein a plurality of micropores are formed on the TPU microporous film layer at intervals, the pore diameter of each micropore is 20-30 μm, and the pore distance between two adjacent micropores is 45-60 μm.
2. The waterproof and flame-retardant composite fabric for the outdoor protective cover according to claim 1, characterized in that: the pre-oxidized fiber is polyacrylonitrile fiber which is subjected to pre-oxidation treatment, and the non-pre-oxidized fiber is at least one of cotton-hemp blended fiber, polyester fiber, polyamide fiber and spandex fiber.
3. The waterproof and flame-retardant composite fabric for the outdoor protective cover according to claim 1, characterized in that: the halogen-free flame retardant used in the flame-retardant adhesive layer is a phosphorus-containing flame retardant, and the used thermal expansion microspheres are akzonobel thermal expansion microspheres; a plurality of micropores which are arranged at intervals and have the aperture of 10-20 mu m are formed on the formed flame-retardant adhesive layer.
4. The waterproof and flame-retardant composite fabric for the outdoor protective cover according to claim 3, characterized in that: the phosphorus-containing flame retardant is at least one of triphenyl phosphate, tricresyl phosphate, cresyl diphenyl phosphate, trixylenyl phosphate, tris- (2,4, 6-trimethylphenyl) phosphate, tris- (2, 4-di-tert-butylphenyl) phosphate, tris- (2, 6-di-tert-butylphenyl) phosphate, resorcinol bis- (diphenyl phosphate), hydroquinone bis- (diphenyl phosphate), bisphenol A bis (diphenyl phosphate), resorcinol bis (2, 6-di-tert-butylphenyl) phosphate and hydroquinone bis (2, 6-dimethylphenyl) phosphate.
5. The waterproof and flame-retardant composite fabric for the outdoor protective cover according to claim 3, characterized in that: the polyurethane adhesive mainly comprises the following components in percentage by mass of the total mass of the polyurethane adhesive: 3-5 wt.% of halogen-free flame retardant, 1-2 wt.% of thermal expansion microspheres and the balance of emulsion type polyurethane adhesive.
6. The waterproof and flame-retardant composite fabric for the outdoor protective cover according to claim 1, characterized in that: the TPU microporous film layer is formed on the surface of the fabric layer by components mainly comprising TPU resin particles, polytetrafluoroethylene and an ester solvent through a melting process, a casting process and a needle rolling process, wherein the mass ratio of the TPU resin particles to the polytetrafluoroethylene to the ester solvent is (25-30): (6-7): 1.
7. The waterproof and flame-retardant composite fabric for the outdoor protective cover according to claim 6, characterized in that: the ester solvent is one of dioctyl adipate, dibutyl adipate and dihexyl adipate.
8. A method for preparing the waterproof and flame-retardant composite fabric for the outdoor protective cover of any one of claims 1 to 7, which is characterized in that: the method comprises the following steps:
s1: obtaining a flame-retardant fabric layer by weaving pre-oxidized fiber and non-pre-oxidized fiber;
s2: sequentially adding a halogen-free flame retardant and thermal expansion microspheres into the emulsion type polyurethane adhesive, and continuously stirring for 2-3h at the stirring speed of 1000-1500r/min to obtain the polyurethane adhesive;
s3: after the polyurethane adhesive is coated on the surfaces of the flame-retardant fabric layers positioned between the two adjacent flame-retardant fabric layers and on the outer side surfaces, the fabric layers coated with the polyurethane adhesive are heated and pre-dried for 8-10min at the temperature of 100-110 ℃, and then cooled;
s4: mixing TPU resin particles, polytetrafluoroethylene and an ester solvent in proportion, carrying out stirring reaction at the temperature of 110-115 ℃ for 30-35min, and plasticizing the obtained product at the temperature of 130-140 ℃ to obtain a plasticized TPU mixture;
s5: and (3) carrying out casting coating on the plasticized TPU mixture in the step S4 on the surface of the fabric layer coated with the polyurethane adhesive in the step S3 through a casting process, and then forming a TPU microporous film layer on the surface of the fabric layer through a needle rolling process.
9. The method of claim 8, wherein: the casting process adopts 110-DEG C120-DEG C infrared pre-drying, and the casting coating amount is 1000-DEG C1200 g/m2。
CN202010525662.6A 2020-06-10 2020-06-10 Waterproof flame-retardant composite fabric for outdoor protective cover and preparation process thereof Pending CN111705516A (en)

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