CN113737529A - Water-based flame-retardant floor pad leather for motor car and preparation method thereof - Google Patents
Water-based flame-retardant floor pad leather for motor car and preparation method thereof Download PDFInfo
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- CN113737529A CN113737529A CN202110952414.4A CN202110952414A CN113737529A CN 113737529 A CN113737529 A CN 113737529A CN 202110952414 A CN202110952414 A CN 202110952414A CN 113737529 A CN113737529 A CN 113737529A
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- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 title claims abstract description 123
- 239000003063 flame retardant Substances 0.000 title claims abstract description 123
- 239000010985 leather Substances 0.000 title claims abstract description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 33
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 239000004744 fabric Substances 0.000 claims abstract description 99
- 238000005470 impregnation Methods 0.000 claims abstract description 69
- 229920002635 polyurethane Polymers 0.000 claims abstract description 62
- 239000004814 polyurethane Substances 0.000 claims abstract description 62
- 239000007788 liquid Substances 0.000 claims abstract description 37
- 238000001035 drying Methods 0.000 claims abstract description 28
- 239000000835 fiber Substances 0.000 claims abstract description 26
- 239000000843 powder Substances 0.000 claims abstract description 26
- 229920005989 resin Polymers 0.000 claims abstract description 22
- 239000011347 resin Substances 0.000 claims abstract description 22
- 239000008234 soft water Substances 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 19
- 230000006835 compression Effects 0.000 claims abstract description 9
- 238000007906 compression Methods 0.000 claims abstract description 9
- 238000007654 immersion Methods 0.000 claims abstract description 9
- 230000008569 process Effects 0.000 claims abstract description 8
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 7
- 239000002994 raw material Substances 0.000 claims abstract description 4
- 239000011248 coating agent Substances 0.000 claims abstract description 3
- 238000000576 coating method Methods 0.000 claims abstract description 3
- 239000002002 slurry Substances 0.000 claims description 12
- 239000002518 antifoaming agent Substances 0.000 claims description 10
- 239000003795 chemical substances by application Substances 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 9
- 239000000080 wetting agent Substances 0.000 claims description 9
- 239000000945 filler Substances 0.000 claims description 7
- 238000004080 punching Methods 0.000 claims description 6
- 239000011159 matrix material Substances 0.000 claims description 3
- 239000011268 mixed slurry Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 239000004745 nonwoven fabric Substances 0.000 claims description 3
- 238000007711 solidification Methods 0.000 claims description 3
- 230000008023 solidification Effects 0.000 claims description 3
- 239000002562 thickening agent Substances 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000005265 energy consumption Methods 0.000 abstract description 3
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- 238000012360 testing method Methods 0.000 description 2
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- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 229920001410 Microfiber Polymers 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229940043430 calcium compound Drugs 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
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- 230000006872 improvement Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000002649 leather substitute Substances 0.000 description 1
- 150000002681 magnesium compounds Chemical class 0.000 description 1
- 239000003658 microfiber Substances 0.000 description 1
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- 239000001301 oxygen Substances 0.000 description 1
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- 239000011527 polyurethane coating Substances 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
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- 239000002904 solvent Substances 0.000 description 1
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Images
Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
- D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D06M15/564—Polyureas, polyurethanes or other polymers having ureide or urethane links; Precondensation products forming them
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2200/00—Functionality of the treatment composition and/or properties imparted to the textile material
- D06M2200/30—Flame or heat resistance, fire retardancy properties
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Synthetic Leather, Interior Materials Or Flexible Sheet Materials (AREA)
Abstract
The invention relates to water-based flame-retardant ground cushion leather for a motor car and a preparation method thereof. The method comprises the following steps: preparing a waterborne polyurethane flame-retardant immersion liquid and preparing base cloth, wherein the waterborne polyurethane flame-retardant immersion liquid mainly comprises the following raw materials: the flame-retardant coating comprises aqueous polyurethane impregnated resin, soft water, flame-retardant powder and a small amount of auxiliary agent, wherein the dosage of the flame-retardant powder is 2-3 times of that of the aqueous polyurethane impregnated resin and is equivalent to that of the soft water; immersing the base cloth into an impregnation tank filled with the waterborne polyurethane flame-retardant impregnation liquid, and drawing the base cloth through a plurality of impregnation rollers until fiber gaps of the base cloth are filled to form impregnated base cloth; and (3) extruding the soaked base cloth through a compression roller, and then drying and forming the water-based flame-retardant motor car floor mat leather. The invention adopts the process routes of impregnation, extrusion and drying, has simple production process, and saves energy consumption and personnel; the formed flame-retardant ground cushion leather is distributed with high-content flame-retardant powder, can extinguish fire and is very safe.
Description
Technical Field
The invention relates to the technical field of synthetic leather preparation, in particular to waterborne flame-retardant ground cushion leather for a motor car and a preparation method thereof.
Background
With the continuous change of the demand of people, various artificial leathers, synthetic leathers and microfiber leathers are produced and widely applied to wearing materials and decorative materials. The waterborne polyurethane takes water as a medium, has the advantages of environmental protection, greenness, easy modification and the like, and the waterborne polyurethane resin gradually replaces a solvent type, becomes the main development direction of a new generation of decorative materials and is generally applied. Due to the improvement of the requirements of people on flame-retardant protection safety, the research on flame retardance and fire safety of the waterborne polyurethane leather is gradually carried out, and particularly, the waterborne polyurethane leather is used for interior decoration materials of vehicles such as high-speed rails, airplanes and automobiles, and once a fire occurs, the rescue difficulty is extremely high and the safety of life and property of unspecified most passengers is damaged due to the fact that the space is narrow and tight and the personnel density is high.
Disclosure of Invention
In order to solve the existing problems, the invention provides water-based flame-retardant floor mat leather for a motor vehicle and a preparation method thereof.
The technical scheme provided by the invention is as follows:
a preparation method of water-based flame-retardant floor pad leather for motor vehicles comprises the following steps:
preparing a waterborne polyurethane flame-retardant immersion liquid and preparing base cloth, wherein the waterborne polyurethane flame-retardant immersion liquid mainly comprises the following raw materials: the flame-retardant coating comprises aqueous polyurethane impregnated resin, soft water, flame-retardant powder and a small amount of auxiliary agent, wherein the dosage of the flame-retardant powder is 2-3 times of that of the aqueous polyurethane impregnated resin and is equivalent to that of the soft water;
immersing the base cloth into an impregnation tank filled with the waterborne polyurethane flame-retardant impregnation liquid, and drawing the base cloth through a plurality of impregnation rollers until fiber gaps of the base cloth are filled to form impregnated base cloth;
and (3) extruding the soaked base cloth through a compression roller, and then drying and forming the water-based flame-retardant motor car floor mat leather.
Further, the aqueous polyurethane flame-retardant impregnation liquid is mainly prepared from the following components in parts by weight: 100 parts of waterborne polyurethane impregnating resin, 250-260 parts of soft water, 250-270 parts of flame retardant powder, 5-7 parts of defoaming agent, 18-20 parts of wetting agent, 8-10 parts of curing agent and 3-6 parts of waterborne color paste.
Further, the preparation method of the aqueous polyurethane flame-retardant impregnation liquid comprises the following steps:
weighing the aqueous polyurethane impregnating resin and soft water according to the dosage, stirring and mixing for 5-10 minutes at the rotating speed of 300-500 r/min to form premixed slurry;
adding flame-retardant powder with a preset dosage into the premixed slurry, and uniformly stirring at a high speed of 1000 revolutions per minute for 15-25 minutes at 800-;
adding the wetting agent, the curing agent, the defoaming agent and the water-based color paste into the flame-retardant mixed slurry, and uniformly stirring for 10-15 minutes to obtain flame-retardant slurry;
adding a thickening agent into the flame-retardant slurry to thicken to 1500-2000 cPas per second, and controlling the rotating speed at 400-600 rpm to form the aqueous polyurethane flame-retardant impregnation liquid.
Further, in the process of immersing the base fabric into the impregnation tank, the base fabric is drawn through 3 impregnation rollers until the aqueous polyurethane flame-retardant impregnation liquid is impregnated into the base fabric to fill the fiber gaps of the base fabric.
Further, in the step of pressing the soaked base cloth by the press rolls, the press roll gap is set to be 75-85% of the thickness of the base cloth.
Further, in the step of drying and forming, the drying is performed in an oven, and the drying temperature is controlled at 120-160 ℃.
Further, in the step of immersing the base fabric into an impregnation tank filled with the aqueous polyurethane flame-retardant impregnation liquid, drawing the base fabric through a plurality of impregnation rollers until fiber gaps of the base fabric are filled to form the impregnated base fabric, the routing speed of the base fabric is controlled to be 6-8 m/min.
The invention also provides the water-based flame-retardant ground cushion leather for the bullet train, which is prepared by the method and has a laminated structure and sequentially comprises a first flame-retardant layer, a base fabric fiber layer and a second flame-retardant layer.
Furthermore, the base fabric fiber layer is composed of base fabric serving as a framework structure and filler serving as a matrix and filled in gaps of the fiber structure of the base fabric, and flame retardant powder is uniformly and densely distributed in the first flame retardant layer, the second flame retardant layer and the filler, so that the water-based flame-retardant automotive floor mat leather is extinguished after being separated from fire.
Furthermore, the base fabric is a needle-punched non-woven fabric with a fiber web structure formed by fiber arrangement, needle punching and solidification, and the needle punching density per square centimeter is more than or equal to 500 needles.
Compared with the prior art, the preparation method of the water-based flame-retardant ground cushion leather for the motor car, which is provided by the invention, adopts the process routes of impregnation, extrusion and drying to form the flame-retardant ground cushion leather, has a simple production process, and saves energy consumption and personnel; the surface layer and the interior of the formed flame-retardant floor mat leather are uniformly distributed with high-content flame-retardant powder, so that the finished product can be extinguished away from fire, is very safe, and creates opportunities for rescue and escape in fire.
Drawings
FIG. 1 is a flow chart of the preparation of a waterborne flame retardant padding leather for motor vehicles in the embodiment of the invention.
Fig. 2 is a schematic diagram of an apparatus employing the process shown in fig. 1.
FIG. 3 is a flow chart of the preparation of the aqueous polyurethane flame-retardant impregnation solution shown in FIG. 1.
FIG. 4 is a schematic structural diagram of the water-based flame-retardant motor car floor mat leather of the invention.
Description of the main element symbols:
unreeling machine 1
Oven 5
Aqueous polyurethane flame-retardant impregnation liquid 10
First flame retardant layer 100
Base fabric fiber layer 200
Second flame retardant layer 300
The following detailed description will further illustrate the invention in conjunction with the above-described figures.
Detailed Description
In order that the present invention may be more clearly understood and appreciated, the objects, features and advantages thereof have been described in detail below with reference to the accompanying drawings. In addition, the features of the embodiments of the present application may be combined with each other without conflict.
The following description is presented to facilitate a thorough understanding of the invention. The described embodiments are only some embodiments of the invention, not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative effort belong to the protection scope of the embodiments of the present invention.
Soft water (soft water) refers to water containing no or less soluble calcium and magnesium compounds. Soft water is less likely to produce soap scum than soap, as opposed to hard water.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which embodiments of the present invention belong. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
The invention provides a preparation method of waterborne flame-retardant floor pad leather for motor vehicles, which is characterized in that waterborne polyurethane impregnating resin, soft water, flame-retardant powder, a small amount of auxiliary agents and the like are adopted to prepare the waterborne polyurethane flame-retardant impregnating solution, wherein the dosage ratio of the flame-retardant powder to the waterborne polyurethane impregnating resin is designed to be 2-3, and then the waterborne flame-retardant floor pad leather for motor vehicles is formed through the steps of impregnating, extruding and drying, so that the high-content flame-retardant powder is uniformly distributed on the surface layer and the interior of the product, and the finished product can be extinguished after leaving fire, and is very safe.
Referring to fig. 1, the preparation process of the water-based flame-retardant railway car floor mat leather of the present invention includes the following steps.
And step S1, preparing the waterborne polyurethane flame-retardant impregnation liquid and preparing the base cloth. In the step, the aqueous polyurethane flame-retardant impregnation liquid mainly comprises the following raw materials: the flame-retardant polyurethane coating comprises aqueous polyurethane impregnated resin, soft water, flame-retardant powder and a small amount of auxiliary agent, wherein the dosage of the flame-retardant powder is 2-3 times of that of the aqueous polyurethane impregnated resin and is equivalent to that of the soft water. The aqueous polyurethane impregnated resin plays a role in adhesion, and can fix functional components such as flame retardant powder and the like in fiber gaps and surface layers of the base cloth. The flame-retardant powder mainly has the flame-retardant effect, the content of the flame-retardant powder is improved, the uniform distribution of the flame-retardant powder is controlled, the use property of the ground mat leather can be met, meanwhile, the fire is avoided, the contact between flammable components and air or flammable gas is cut off, and the fire possibly caused by flame spread is blocked. The auxiliary agent is a common agent required by processing and forming, such as a curing agent, a wetting agent, a defoaming agent and the like. The curing agent is used for enhancing or controlling the process of the curing reaction of the aqueous polyurethane impregnating resin. The wetting agent reduces the surface tension or interfacial tension of the base fabric, so that the impregnation liquid can better penetrate through the base fabric, and the base fabric is wetted. The defoaming agent can reduce the surface tension of the immersion liquid, prevent the formation of foam, reduce or eliminate the original foam, improve the infiltration compactness of the immersion liquid and ensure the product quality.
In a specific embodiment, the aqueous polyurethane flame-retardant impregnation liquid is mainly prepared from the following components in parts by weight: 100 parts of waterborne polyurethane impregnating resin, 250-260 parts of soft water, 250-270 parts of flame retardant powder, 5-7 parts of defoaming agent, 18-20 parts of wetting agent, 8-10 parts of curing agent and 3-6 parts of waterborne color paste. Wherein, the water-based color paste is a colorant and is selected based on the requirements of users.
The preparation process of the aqueous polyurethane flame-retardant impregnation liquid in the above embodiment comprises the following steps.
Step S11, weighing the aqueous polyurethane impregnating resin and the soft water according to the dosage, and stirring and mixing for 5-10 minutes at the rotating speed of 300-500 r/m to form the premixed slurry.
Step S12, adding a preset amount of flame retardant powder into the premixed slurry, and uniformly stirring at a high speed of 800-.
And step S13, adding the wetting agent, the curing agent, the defoaming agent and the water-based color paste into the flame-retardant mixed slurry, and uniformly stirring for 10-15 minutes to obtain the flame-retardant slurry.
Step S14, adding a thickening agent into the flame-retardant slurry to thicken to 1500-2000 cPas per second, and controlling the rotating speed at 400-600 rpm to form the aqueous polyurethane flame-retardant immersion liquid 10.
Step S2, the base fabric is dipped into the impregnation tank 2 containing the aqueous polyurethane flame-retardant impregnation liquid 10, and is pulled through a plurality of impregnation rollers 3 until the fiber gaps of the base fabric are filled to form a impregnated base fabric.
In the specific embodiment, during the process of immersing the base fabric into the impregnation tank 2, the base fabric is preferably pulled through 3 impregnation rollers 3 (see fig. 2) until the aqueous polyurethane flame-retardant impregnation liquid impregnates the base fabric to fill the fiber gaps of the base fabric. The impregnation roller 3 leads the base cloth to be contacted with the aqueous polyurethane flame-retardant impregnation liquid 10 in a guiding mode, and under the condition of a certain formula, through series tests, the number of the impregnation roller 3 is too small, the base cloth is not sufficiently impregnated, the solid content of the aqueous polyurethane flame-retardant impregnation liquid 10 on the base cloth is less, and the flame retardant property of the product is not ideal; when the number of the impregnation rollers 3 is more than 3, the base fabric is sufficiently impregnated, the solid content is increased, but the amount of the aqueous polyurethane flame-retardant impregnation liquid is obviously large, so that the material waste and the cost are increased. In the specific embodiment, the routing speed of the base cloth is controlled to be 6-8 m/min. It can be understood that the routing speed and the outer diameter of the impregnation roller 3 are all closely related to the impregnation effect, when other parameters are fixed, insufficient impregnation can be caused by too high routing speed, and the routing speed is too low, the production speed is full, the time consumption is long, and the impregnation effect is not ideal.
And step S3, extruding the soaked base cloth through a pressing roller 4, and then drying and forming the water-based flame-retardant motor car floor mat leather.
In a particular embodiment, in the step of pressing the saturated base fabric through the press rolls 4, the nip is set to 75% to 85%, preferably 80%, of the thickness of the base fabric. It should be noted that the roll gap needs to be changed according to the thickness change of the base fabric, the infiltration amount and the thickness uniformity in the production process are strictly controlled, the integral consistency of the solid content of each area of the product is ensured, and the high requirement of the application field on the flame retardance of the product is met. In addition, in the step of drying and forming, the drying is carried out in the drying oven 5, and the drying temperature is controlled at 120-160 ℃. As shown in fig. 2, an on-line drying device can be used for on-line continuous drying treatment, and the production line sequentially comprises an unreeling machine 1, an impregnation tank 2 (provided with 3 impregnation rollers 3), a press roller 4, an oven 5, a winding machine 6, and a plurality of guide rollers arranged between the devices.
The water-based flame-retardant padding leather for the motor vehicle, which is prepared through the process steps, has a laminated structure and sequentially comprises a first flame-retardant layer 100, a base fabric fiber layer 200 and a second flame-retardant layer 300 as shown in fig. 4. In a specific embodiment, the base fabric fiber layer 200 is composed of a base fabric 201 as a skeleton structure and a filler 203 as a matrix filled in gaps of the fiber structure of the base fabric 201, and the first flame-retardant layer 100, the second flame-retardant layer 300 and the filler 203 are uniformly and densely distributed with flame-retardant powder, so that the waterborne flame-retardant automotive upholstery leather is extinguished after being separated from fire. Specifically, the base fabric 201 is a needle-punched non-woven fabric with a fiber web structure formed by fiber arrangement, needle punching and solidification, and the needle punching density per square centimeter is more than or equal to 500 needles.
The preparation process and performance of the water-based flame-retardant motor vehicle floor mat leather are illustrated in the following with reference to specific examples.
Example 1
100kg of aqueous polyurethane impregnating resin and 250kg of soft water are stirred and mixed for 5-10 minutes at the rotating speed of 300-.
Unreeling the base cloth, immersing the base cloth into proper amount of water-based polyurethane flame-retardant impregnation liquid contained in an impregnation tank, extruding the base cloth by 3 impregnation rollers and a compression roller (the gap is 80% of the thickness of the base cloth), and finally drying and reeling the base cloth by an oven to prepare a finished product, wherein the drying temperature is 150-.
Example 2
100kg of aqueous polyurethane impregnating resin and 260kg of soft water are stirred and mixed for 5-10 minutes at the rotating speed of 300-.
Unreeling the base cloth, immersing the base cloth into proper amount of water-based polyurethane flame-retardant impregnation liquid contained in an impregnation tank, extruding the base cloth by 3 impregnation rollers and a compression roller (the gap is 75 percent of the thickness of the base cloth), and finally drying and reeling the base cloth by an oven to prepare a finished product, wherein the drying temperature is 135 plus one hour at 150 ℃, and the speed is 6.5-7.5 m/min.
Example 3
100kg of aqueous polyurethane impregnating resin and 255kg of soft water are stirred and mixed for 5-10 minutes at the rotating speed of 300-.
Unwinding the base cloth, immersing the base cloth into proper amount of water-based polyurethane flame-retardant impregnation liquid contained in an impregnation tank, extruding the base cloth by 3 impregnation rollers and a compression roller (the gap is 85% of the thickness of the base cloth), and finally drying and coiling the base cloth in an oven to prepare a finished product, wherein the drying temperature is 125-.
Example 4
100kg of aqueous polyurethane impregnating resin and 258kg of soft water are stirred and mixed for 5-10 minutes at the rotating speed of 300-.
Unreeling the base cloth, immersing the base cloth into proper amount of water-based polyurethane flame-retardant impregnation liquid contained in an impregnation tank, extruding the base cloth by 3 impregnation rollers and a compression roller (the gap is 80% of the thickness of the base cloth), and finally drying and reeling the base cloth by an oven to prepare a finished product, wherein the drying temperature is 120-.
The finished product obtained by the embodiment is tested, the smoke density is less than or equal to 150, the oxygen index is more than 30, the hardness test is more than 80, and the finished product is mainly used as the ground cushion leather for the motor car and is safe and reliable. In other embodiments, the dosage and the constituent components of the above formula may be adjusted, and are not limited to the above embodiments, for example, the aqueous color paste may be omitted in some embodiments, the dosage of the auxiliary agents such as the defoaming agent, the wetting agent, the curing agent, etc. may be influenced by the production process, and may not be limited to the preferred formula range provided by the present invention, for example, when the impregnation roller is configured with the vibration module to achieve the effect of eliminating bubbles, the dosage of the defoaming agent may be reduced or not added, etc.
In conclusion, the preparation method of the water-based flame-retardant ground cushion leather for the bullet trains, which is provided by the invention, takes the water-based polyurethane as the adhesive, is economic and environment-friendly, designs the high-content flame-retardant components to fully cover the surface layer of the base cloth and fill the internal gaps, so that the finished product can be extinguished away from fire, and is very safe; the invention adopts the process routes of impregnation, extrusion and drying, has simple production process, saves energy consumption and personnel, and is suitable for industrial production.
The above are all preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (10)
1. The preparation method of the water-based flame-retardant floor pad leather for the motor car is characterized by comprising the following steps of: preparing a waterborne polyurethane flame-retardant immersion liquid and preparing base cloth, wherein the waterborne polyurethane flame-retardant immersion liquid mainly comprises the following raw materials: the flame-retardant coating comprises aqueous polyurethane impregnated resin, soft water, flame-retardant powder and a small amount of auxiliary agent, wherein the dosage of the flame-retardant powder is 2-3 times of that of the aqueous polyurethane impregnated resin and is equivalent to that of the soft water;
immersing the base cloth into an impregnation tank filled with the waterborne polyurethane flame-retardant impregnation liquid, and drawing the base cloth through a plurality of impregnation rollers until fiber gaps of the base cloth are filled to form impregnated base cloth;
and (3) extruding the soaked base cloth through a compression roller, and then drying and forming the water-based flame-retardant motor car floor mat leather.
2. The method according to claim 1, wherein the aqueous polyurethane flame-retardant impregnation liquid is mainly prepared from the following components in parts by weight: 100 parts of waterborne polyurethane impregnating resin, 250-260 parts of soft water, 250-270 parts of flame retardant powder, 5-7 parts of defoaming agent, 18-20 parts of wetting agent, 8-10 parts of curing agent and 3-6 parts of waterborne color paste.
3. The method according to claim 2, wherein the method for preparing the aqueous polyurethane flame-retardant impregnation liquid comprises the following steps:
weighing the aqueous polyurethane impregnating resin and soft water according to the dosage, stirring and mixing for 5-10 minutes at the rotating speed of 300-500 r/min to form premixed slurry;
adding flame-retardant powder with a preset dosage into the premixed slurry, and uniformly stirring at a high speed of 1000 revolutions per minute for 15-25 minutes at 800-;
adding the wetting agent, the curing agent, the defoaming agent and the water-based color paste into the flame-retardant mixed slurry, and uniformly stirring for 10-15 minutes to obtain flame-retardant slurry;
adding a thickening agent into the flame-retardant slurry to thicken to 1500-2000 cPas per second, and controlling the rotating speed at 400-600 rpm to form the aqueous polyurethane flame-retardant impregnation liquid.
4. The method of claim 1, wherein: in the process of immersing the base cloth into the impregnation tank, the base cloth is drawn to pass through 3 impregnation rollers until the base cloth is impregnated by the aqueous polyurethane flame-retardant impregnation liquid and the fiber gaps of the base cloth are filled.
5. The method of claim 1, wherein: and in the step of extruding the soaked base cloth by the compression roller, the compression roller gap is set to be 75-85% of the thickness of the base cloth.
6. The method of claim 1, wherein: in the step of drying and forming, the drying is carried out in an oven, and the drying temperature is controlled at 120-160 ℃.
7. The method of claim 1, wherein: and (3) immersing the base fabric into an impregnation tank filled with the waterborne polyurethane flame-retardant impregnation liquid, and drawing the base fabric through a plurality of impregnation rollers until fiber gaps of the base fabric are filled to form the impregnated base fabric, wherein the wiring speed of the base fabric is controlled to be 6-8 m/min.
8. The water-based flame-retardant floor mat leather for the bullet trains is characterized in that: prepared by the method of any one of claims 1 to 7, which is a laminated structure comprising a first flame-retardant layer, a base fabric fiber layer and a second flame-retardant layer in sequence.
9. The water-based flame-retardant motor car floor mat leather according to claim 8, characterized in that: the base fabric fiber layer is composed of base fabric serving as a framework structure and filler serving as a matrix and filled in gaps of the fiber structure of the base fabric, and flame retardant powder is uniformly and densely distributed on the first flame retardant layer, the second flame retardant layer and the filler, so that the water-based flame-retardant motor car floor mat leather is extinguished after being separated from fire.
10. The water-based flame-retardant motor car floor mat leather according to claim 9, characterized in that: the base fabric is a needle-punched non-woven fabric with a fiber web structure formed by fiber arrangement, needle punching and solidification, and the needle punching density per square centimeter is more than or equal to 500 needles.
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Application publication date: 20211203 |