CN112921426B - Flame-retardant polyethylene composite fabric based on metal framework and preparation process thereof - Google Patents
Flame-retardant polyethylene composite fabric based on metal framework and preparation process thereof Download PDFInfo
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- CN112921426B CN112921426B CN202110124744.4A CN202110124744A CN112921426B CN 112921426 B CN112921426 B CN 112921426B CN 202110124744 A CN202110124744 A CN 202110124744A CN 112921426 B CN112921426 B CN 112921426B
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/07—Addition of substances to the spinning solution or to the melt for making fire- or flame-proof filaments
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/02—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D01F6/04—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds from polyolefins
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B1/00—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
- D04B1/14—Other fabrics or articles characterised primarily by the use of particular thread materials
- D04B1/16—Other fabrics or articles characterised primarily by the use of particular thread materials synthetic threads
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B21/00—Warp knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2321/00—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D10B2321/02—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polyolefins
- D10B2321/021—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polyolefins polyethylene
Abstract
The invention discloses a flame-retardant polyethylene composite fabric based on a metal framework and a preparation process thereof. The fabric is mainly prepared from ultra-high molecular weight polyethylene, pentaerythritol, toluene diisocyanate, 1, 4-dioxane, polyoxyethylene octyl phenol ether-10, ammonium polyphosphate, dibutyl tin dilaurate, sodium fumarate and aluminum nitrate nonahydrate. The fumaric acid can be used cooperatively with the ammonium polyphosphate, the ammonium polyphosphate can release ammonia gas at a lower temperature, dilute combustible gas and play a role in gas phase flame retardance, and meanwhile, the ammonium polyphosphate can promote polyurethane dehydration and carbonization, isolate air, block heat transfer, reduce heat release, and react with isocyanate and alcohols generated by polyurethane decomposition to form a polyimide structure, so that a carbon layer is more compact and a flame retardance effect is better. The polyethylene composite fabric prepared by the method has good flame retardant effect, isolates air, reduces heat release amount and has high industrial value.
Description
Technical Field
The invention relates to the technical field of fabric preparation, in particular to a flame-retardant polyethylene composite fabric based on a metal framework and a preparation process thereof.
Background
The fabric is a material for manufacturing a series of textiles such as clothes, cloth, masks, tents and the like, is widely used for manufacturing the clothes, and the style of the fabric is various, so that the style and the characteristics of the clothes are diversified. The materials of the fabrics are also more and more diversified.
The ultra-high molecular weight polyethylene fiber is also called as high-strength high-modulus polyethylene fiber, is the fiber with highest specific strength and specific modulus in the world at present, has large elongation at break, has strong energy absorbing capacity, has the characteristics of impact resistance and cutting resistance, and has the advantages of low density of the ultra-high molecular weight polyethylene fiber which is only 0.97g/cm 3 The fabric woven by the ultra-high molecular weight polyethylene fiber has the advantages of light material and good air permeability, and is excellent in chemical corrosion resistance and wear resistance, and is widely used in processing raw materials of the fabric at present.
Along with the enrichment of daily life of people, more and more demands are met, a batch of brand-new fabrics are gradually flushed in the market, the characteristics of the brand-new fabrics are different, the thermal fabric, the windproof fabric and the waterproof fabric are common to fireproof and flame-retardant fabrics, but the fire-retardant fabrics cannot be prevented from crossing fire in daily life, for example, fireproof clothing worn by firefighters is a guarantee for life of the firefighters, so that the invention discloses the flame-retardant polyethylene composite fabric based on the metal framework and a preparation process of the flame-retardant polyethylene composite fabric.
Disclosure of Invention
The invention aims to provide a flame-retardant polyethylene composite fabric based on a metal framework and a preparation process thereof, so as to solve the problems in the background technology.
In order to solve the technical problems, the invention provides the following technical scheme:
a flame-retardant polyethylene composite fabric based on a metal framework is mainly prepared from microencapsulated ammonium polyphosphate, the metal framework and ultra-high molecular weight polyethylene.
Further, the microencapsulated ammonium polyphosphate is mainly prepared from pentaerythritol, toluene diisocyanate, 1, 4-dioxane, polyoxyethylene octyl phenol ether-10, ammonium polyphosphate and dibutyl tin dilaurate.
Further, the metal framework is mainly prepared from sodium fumarate and aluminum nitrate nonahydrate.
A preparation process of a flame-retardant polyethylene composite fabric based on a metal framework comprises the following steps:
s1: coating ammonium polyphosphate with thermoplastic polyurethane elastomer to prepare microencapsulated ammonium polyphosphate;
s2: preparing a metal framework by taking aluminum as a metal source and fumaric acid as an organic ligand;
s3: blending, extruding, cooling, super-stretching and cooling metal frameworks, microencapsulated ammonium polyphosphate, ultra-high molecular weight polyethylene and decalin to prepare ultra-high molecular weight polyethylene long fibers;
s4: preheating, curling, multistage drying and cutting the ultra-high molecular weight polyethylene long fibers to prepare ultra-high molecular weight polyethylene short fibers;
s5: and spinning the ultra-high molecular weight polyethylene short fibers to obtain the polyethylene composite fabric.
Further, S1: adding pentaerythritol into dimethyl sulfoxide, heating in a water bath, stirring uniformly, adding toluene diisocyanate, keeping the temperature unchanged, stirring uniformly, adding 1, 4-dioxane, keeping the temperature unchanged, stirring uniformly, sequentially adding ammonium polyphosphate, 1, 4-dioxane, polyoxyethylene octyl phenol ether-10 and dibutyltin dilaurate, heating in a water bath, stirring uniformly, standing, cooling to room temperature, filtering, flushing and drying to obtain polyurethane-coated microencapsulated ammonium polyphosphate;
in the step S1, the microencapsulated ammonium polyphosphate with a core-shell structure is prepared as a flame retardant, when sodium polyphosphate is independently added as the flame retardant, the ammonium polyphosphate has poor compatibility with the ultra-high molecular weight polyethylene, is difficult to uniformly distribute in the ultra-high molecular weight polyethylene, has poor flame retardant effect, and can improve the compatibility of the ammonium polyphosphate and the ultra-high molecular weight polyethylene by wrapping the ammonium polyphosphate with polyurethane, and can be better dispersed in the ultra-high molecular weight polyethylene because the methylene of the ultra-high molecular weight polyethylene has an electron-withdrawing effect and the oxygen-containing groups of the polyurethane have an electron-withdrawing effect;
further, S2: mixing sodium fumarate with deionized water to obtain a solution A, mixing aluminum nitrate nonahydrate with deionized water to obtain a solution B, dropwise dripping the solution A into the solution B, heating in a water bath, stirring uniformly, centrifuging, washing, and drying to obtain a metal framework;
in the step S2, the metal framework prepared from aluminum and fumaric acid can improve the tensile strength and wear resistance of the fabric, meanwhile, when the fabric burns at high temperature, aluminum is combined with oxygen in air, a layer of compact aluminum oxide film is rapidly generated on the surface of the fabric to isolate air, so that the combustion is gradually extinguished, meanwhile, the metal framework formed by aluminum and fumaric acid has the function of adsorbing carbon dioxide, when the fabric burns, the adsorbed carbon dioxide is released, and the oxygen content is reduced, so that the flame retardant effect is realized;
further, S3: placing a metal framework, microencapsulated ammonium polyphosphate, ultra-high molecular weight polyethylene and decalin in a double-screw extruder, carrying out melt blending, extrusion, cooling, super stretching and cooling to obtain ultra-high molecular weight polyethylene long fibers;
in the step S3, the metal framework prepared by aluminum and fumaric acid, the microencapsulated ammonium polyphosphate wrapped by polyurethane and the ultra-high molecular weight polyethylene are blended to prepare the ultra-high molecular weight polyethylene long fiber, when the fabric burns, polyurethane is inflammable, the ammonium polyphosphate is released, the fumaric acid can be used cooperatively with the ammonium polyphosphate, the ammonium polyphosphate can release ammonia gas at a lower temperature, dilute combustible gas, reduce oxygen content and play a role in gas phase flame retardance, and simultaneously the ammonium polyphosphate can promote polyurethane to dehydrate and carbonize to form a carbon layer, isolate air, block heat transfer and reduce heat release; fumaric acid can react with isocyanate and alcohol generated by polyurethane decomposition to form a polyimide structure, so that the carbon layer is more compact and the flame retardant effect is better;
further, S4: preheating, curling, multistage drying and cutting the ultrahigh molecular chain polyethylene long fibers into short fibers to prepare ultrahigh molecular weight polyethylene short fibers;
further, S5: twisting the ultra-high molecular chain polyethylene short fibers into face yarns, and spinning to obtain the polyethylene composite fabric.
Further, S1: adding pentaerythritol into dimethyl sulfoxide, heating in a water bath to 40-50 ℃, stirring for 20-30 min, adding toluene diisocyanate, keeping the temperature unchanged, stirring for 10-15 min, adding 1, 4-dioxane, keeping the temperature unchanged, stirring for 10-15 min, sequentially adding ammonium polyphosphate, 1, 4-dioxane, polyoxyethylene octyl phenol ether-10 and dibutyltin dilaurate, heating in a water bath to 80-90 ℃, stirring for 5-7 h, standing for 1-2 h, cooling to room temperature, filtering, flushing for 3-4 times with deionized water, placing in an oven, and drying at 80 ℃ for 20-30 min to obtain microencapsulated ammonium polyphosphate;
further, S2: mixing sodium fumarate with deionized water to obtain a solution A, mixing aluminum nitrate nonahydrate with deionized water to obtain a solution B, dropwise adding the solution A into the solution B, heating to 40 ℃ in a water bath, stirring for 10-15 min, placing the solution in a centrifuge, centrifuging for 15min at 5000-8000 r/min, flushing 3-4 times with deionized water, placing in an oven, and drying at 80 ℃ for 40-60 min to obtain a metal framework;
further, S3: placing a metal framework, microencapsulated ammonium polyphosphate, ultra-high molecular weight polyethylene and decalin into a double-screw extruder, melt-blending at the screw speed of 80-120 r/min and the temperature of 170-190 ℃, extruding the mixture from a spinneret plate, cooling to room temperature, and cooling to room temperature through a super stretching process to obtain ultra-high molecular weight polyethylene long fibers;
further, S4: preheating the ultra-high molecular chain polyethylene long fiber at 50-60 ℃, curling the ultra-high molecular weight polyethylene long fiber after preheating, carrying out multistage drying on the curled ultra-high molecular weight polyethylene long fiber, placing the coiled ultra-high molecular weight polyethylene long fiber in an oven, drying for 1-2 h at 150 ℃, adjusting the temperature to 100 ℃, drying for 2-3 h, adjusting the temperature to 60 ℃, drying for 3-4 h, and cutting the dried ultra-high molecular weight polyethylene long fiber into short fibers with the length of 50-80 mm to prepare ultra-high molecular weight polyethylene short fibers;
further, S5: twisting the ultra-high molecular chain polyethylene short fibers into face yarns according to 25 twists/10 cm of twist, and spinning the face yarns according to the warp-wise spacing of 0.8cm and the weft-wise spacing of 1.0cm to obtain the polyethylene composite fabric.
Further, in the super stretching process, the ultra-high molecular weight polyethylene long fiber is heated and stretched at 65-105 ℃ in sequence, heated and stretched at 100-150 ℃, and cooled at 30-50 ℃.
Compared with the prior art, the invention has the following beneficial effects:
the invention discloses a flame-retardant polyethylene composite fabric based on a metal framework and a preparation process thereof. In the preparation process, the metal skeleton prepared by the prepared polyurethane coated microencapsulated ammonium polyphosphate, aluminum and sodium fumarate is blended with the ultra-high molecular weight polyethylene to achieve better flame retardant effect, fumaric acid can be used cooperatively with the ammonium polyphosphate, the ammonium polyphosphate can release ammonia gas at a lower temperature to dilute combustible gas, the oxygen content is reduced, the gas-phase flame retardant effect is exerted, meanwhile, the ammonium polyphosphate can promote polyurethane to dehydrate and carbonize to form a carbon layer, isolate air, block heat transfer, reduce heat release, and react with isocyanate and alcohols generated by decomposition of polyurethane to form a polyimide structure, so that the carbon layer is tighter and the flame retardant effect is better. The polyethylene composite fabric prepared by the method has good flame retardant effect, isolates air, reduces heat release amount and has high industrial value.
Detailed Description
The following description of the technical solutions in the embodiments of the present invention will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
A preparation process of a flame-retardant polyethylene composite fabric based on a metal framework comprises the following steps:
s1: coating ammonium polyphosphate with thermoplastic polyurethane elastomer to prepare microencapsulated ammonium polyphosphate;
s2: preparing a metal framework by taking aluminum as a metal source and fumaric acid as an organic ligand;
s3: blending, extruding, cooling, super-stretching and cooling metal frameworks, microencapsulated ammonium polyphosphate, ultra-high molecular weight polyethylene and decalin to prepare ultra-high molecular weight polyethylene long fibers;
s4: preheating, curling, multistage drying and cutting the ultra-high molecular weight polyethylene long fibers to prepare ultra-high molecular weight polyethylene short fibers;
s5: and spinning the ultra-high molecular weight polyethylene short fibers to obtain the polyethylene composite fabric.
Wherein S1: adding pentaerythritol into dimethyl sulfoxide, heating in a water bath to 40 ℃, stirring for 20min, adding toluene diisocyanate, keeping the temperature unchanged, stirring for 10min, adding 1, 4-dioxane, keeping the temperature unchanged, stirring for 10min, sequentially adding ammonium polyphosphate, 1, 4-dioxane, polyoxyethylene octyl phenol ether-10 and dibutyltin dilaurate, heating in the water bath to 80 ℃, stirring for 5h, standing for 1h, cooling to room temperature, filtering, flushing with deionized water for 3 times, placing in an oven, and drying at 80 ℃ for 20min to obtain microencapsulated ammonium polyphosphate;
wherein S2: mixing sodium fumarate with deionized water to obtain solution A, mixing aluminum nitrate nonahydrate with deionized water to obtain solution B, dropwise adding the solution A into the solution B, heating to 40 ℃ in a water bath, stirring for 10min, centrifuging the solution in a centrifuge at 5000r/min for 15min, washing with deionized water for 3 times, placing in an oven, and drying at 80 ℃ for 40min to obtain a metal skeleton;
wherein, S3: placing a metal framework, microencapsulated ammonium polyphosphate, ultra-high molecular weight polyethylene and decalin into a double-screw extruder, melt blending at the screw speed of 80r/min and the temperature of 170 ℃, extruding the mixture from a spinneret plate, cooling to room temperature, heating and stretching at the temperature of 65 ℃, heating and stretching at the temperature of 100 ℃, cooling at the temperature of 30 ℃, and cooling to room temperature to obtain ultra-high molecular weight polyethylene long fibers;
wherein, S4: preheating the ultra-high molecular chain polyethylene long fiber at 50 ℃, curling the ultra-high molecular weight polyethylene long fiber after preheating, carrying out multistage drying on the curled ultra-high molecular weight polyethylene long fiber, placing the multi-stage drying in an oven, drying at 150 ℃ for 1h, adjusting the temperature to 100 ℃, drying for 2h, adjusting the temperature to 60 ℃, drying for 3h, cutting the dried ultra-high molecular weight polyethylene long fiber into short fibers with the length of 50-80 mm, and preparing the ultra-high molecular weight polyethylene short fiber;
wherein, S5: twisting the ultra-high molecular chain polyethylene short fibers into face yarns according to 25 twists/10 cm of twist, and spinning the face yarns according to the warp-wise spacing of 0.8cm and the weft-wise spacing of 1.0cm to obtain the polyethylene composite fabric.
Example 2
A preparation process of a flame-retardant polyethylene composite fabric based on a metal framework comprises the following steps:
s1: coating ammonium polyphosphate with thermoplastic polyurethane elastomer to prepare microencapsulated ammonium polyphosphate;
s2: preparing a metal framework by taking aluminum as a metal source and fumaric acid as an organic ligand;
s3: blending, extruding, cooling, super-stretching and cooling metal frameworks, microencapsulated ammonium polyphosphate, ultra-high molecular weight polyethylene and decalin to prepare ultra-high molecular weight polyethylene long fibers;
s4: preheating, curling, multistage drying and cutting the ultra-high molecular weight polyethylene long fibers to prepare ultra-high molecular weight polyethylene short fibers;
s5: and spinning the ultra-high molecular weight polyethylene short fibers to obtain the polyethylene composite fabric.
Wherein S1: adding pentaerythritol into dimethyl sulfoxide, heating in a water bath to 45 ℃, stirring for 25min, adding toluene diisocyanate, keeping the temperature unchanged, stirring for 13min, adding 1, 4-dioxane, keeping the temperature unchanged, stirring for 13min, sequentially adding ammonium polyphosphate, 1, 4-dioxane, polyoxyethylene octyl phenol ether-10 and dibutyltin dilaurate, heating in the water bath to 85 ℃, stirring for 6h, standing for 2h, cooling to room temperature, filtering, washing with deionized water for 4 times, placing in an oven, and drying at 80 ℃ for 25min to obtain microencapsulated ammonium polyphosphate;
wherein S2: mixing sodium fumarate with deionized water to obtain solution A, mixing aluminum nitrate nonahydrate with deionized water to obtain solution B, dropwise adding the solution A into the solution B, heating to 40 ℃ in a water bath, stirring for 13min, centrifuging the solution in a centrifuge at 6500r/min for 15min, washing with deionized water for 4 times, placing in an oven, and drying at 80 ℃ for 50min to obtain a metal skeleton;
wherein, S3: placing a metal framework, microencapsulated ammonium polyphosphate, ultra-high molecular weight polyethylene and decalin in a double-screw extruder, melt blending at the screw speed of 100r/min and the temperature of 180 ℃, extruding the mixture from a spinneret plate, cooling to room temperature, heating and stretching at the temperature of 85 ℃, heating and stretching at the temperature of 130 ℃, cooling at the temperature of 40 ℃, and cooling to room temperature to obtain ultra-high molecular weight polyethylene long fibers;
wherein, S4: preheating the ultra-high molecular chain polyethylene long fiber at 55 ℃, curling the ultra-high molecular weight polyethylene long fiber after preheating, carrying out multistage drying on the curled ultra-high molecular weight polyethylene long fiber, placing the multi-stage drying in an oven, drying at 150 ℃ for 2 hours, adjusting the temperature to 100 ℃, drying for 3 hours, adjusting the temperature to 60 ℃, drying for 4 hours, cutting the dried ultra-high molecular weight polyethylene long fiber into short fibers with the length of 50-80 mm, and preparing the ultra-high molecular weight polyethylene short fiber;
wherein, S5: twisting the ultra-high molecular chain polyethylene short fibers into face yarns according to 25 twists/10 cm of twist, and spinning the face yarns according to the warp-wise spacing of 0.8cm and the weft-wise spacing of 1.0cm to obtain the polyethylene composite fabric.
Example 3
A preparation process of a flame-retardant polyethylene composite fabric based on a metal framework comprises the following steps:
s1: coating ammonium polyphosphate with thermoplastic polyurethane elastomer to prepare microencapsulated ammonium polyphosphate;
s2: preparing a metal framework by taking aluminum as a metal source and fumaric acid as an organic ligand;
s3: blending, extruding, cooling, super-stretching and cooling metal frameworks, microencapsulated ammonium polyphosphate, ultra-high molecular weight polyethylene and decalin to prepare ultra-high molecular weight polyethylene long fibers;
s4: preheating, curling, multistage drying and cutting the ultra-high molecular weight polyethylene long fibers to prepare ultra-high molecular weight polyethylene short fibers;
s5: and spinning the ultra-high molecular weight polyethylene short fibers to obtain the polyethylene composite fabric.
Wherein S1: adding pentaerythritol into dimethyl sulfoxide, heating in a water bath to 50 ℃, stirring for 30min, adding toluene diisocyanate, keeping the temperature unchanged, stirring for 15min, adding 1, 4-dioxane, keeping the temperature unchanged, stirring for 15min, sequentially adding ammonium polyphosphate, 1, 4-dioxane, polyoxyethylene octyl phenol ether-10 and dibutyltin dilaurate, heating in the water bath to 90 ℃, stirring for 7h, standing for 2h, cooling to room temperature, filtering, washing with deionized water for 4 times, placing in an oven, and drying at 80 ℃ for 30min to obtain microencapsulated ammonium polyphosphate;
wherein S2: mixing sodium fumarate with deionized water to obtain solution A, mixing aluminum nitrate nonahydrate with deionized water to obtain solution B, dropwise adding the solution A into the solution B, heating to 40 ℃ in a water bath, stirring for 15min, centrifuging for 15min at 8000r/min in a centrifuge, washing with deionized water for 4 times, placing in an oven, and drying at 80 ℃ for 60min to obtain a metal skeleton;
wherein, S3: placing a metal framework, microencapsulated ammonium polyphosphate, ultra-high molecular weight polyethylene and decalin in a double-screw extruder, melt blending at the screw speed of 120r/min and the temperature of 190 ℃, extruding the mixture from a spinneret plate, cooling to room temperature, heating and stretching at the temperature of 105 ℃, heating and stretching at the temperature of 150 ℃, cooling at the temperature of 50 ℃, and cooling to room temperature to obtain ultra-high molecular weight polyethylene long fibers;
wherein, S4: preheating the ultra-high molecular chain polyethylene long fiber at 60 ℃, curling the ultra-high molecular weight polyethylene long fiber after preheating, carrying out multistage drying on the curled ultra-high molecular weight polyethylene long fiber, placing the multi-stage drying in an oven, drying at 150 ℃ for 2 hours, adjusting the temperature to 100 ℃, drying for 3 hours, adjusting the temperature to 60 ℃, drying for 4 hours, cutting the dried ultra-high molecular weight polyethylene long fiber into short fibers with the length of 50-80 mm, and preparing the ultra-high molecular weight polyethylene short fiber;
wherein, S5: twisting the ultra-high molecular chain polyethylene short fibers into face yarns according to 25 twists/10 cm of twist, and spinning the face yarns according to the warp-wise spacing of 0.8cm and the weft-wise spacing of 1.0cm to obtain the polyethylene composite fabric.
Comparative example 1
A preparation process of a flame-retardant polyethylene composite fabric based on a metal framework comprises the following steps:
s1: coating ammonium polyphosphate with thermoplastic polyurethane elastomer to prepare microencapsulated ammonium polyphosphate;
s2: the microencapsulated ammonium polyphosphate, the ultra-high molecular weight polyethylene and the decalin are subjected to blending, extrusion, cooling, ultra-stretching and cooling to prepare the ultra-high molecular weight polyethylene long fiber;
s3: preheating, curling, multistage drying and cutting the ultra-high molecular weight polyethylene long fibers to prepare ultra-high molecular weight polyethylene short fibers;
s4: and spinning the ultra-high molecular weight polyethylene short fibers to obtain the polyethylene composite fabric.
Wherein S1: adding pentaerythritol into dimethyl sulfoxide, heating in a water bath to 40 ℃, stirring for 20min, adding toluene diisocyanate, keeping the temperature unchanged, stirring for 10min, adding 1, 4-dioxane, keeping the temperature unchanged, stirring for 10min, sequentially adding ammonium polyphosphate, 1, 4-dioxane, polyoxyethylene octyl phenol ether-10 and dibutyltin dilaurate, heating in the water bath to 80 ℃, stirring for 5h, standing for 1h, cooling to room temperature, filtering, flushing with deionized water for 3 times, placing in an oven, and drying at 80 ℃ for 20min to obtain microencapsulated ammonium polyphosphate;
wherein S2: placing a metal framework, microencapsulated ammonium polyphosphate, ultra-high molecular weight polyethylene and decalin into a double-screw extruder, melt blending at the screw speed of 80r/min and the temperature of 170 ℃, extruding the mixture from a spinneret plate, cooling to room temperature, heating and stretching at the temperature of 65 ℃, heating and stretching at the temperature of 100 ℃, cooling at the temperature of 30 ℃, and cooling to room temperature to obtain ultra-high molecular weight polyethylene long fibers;
wherein, S3: preheating the ultra-high molecular chain polyethylene long fiber at 50 ℃, curling the ultra-high molecular weight polyethylene long fiber after preheating, carrying out multistage drying on the curled ultra-high molecular weight polyethylene long fiber, placing the multi-stage drying in an oven, drying at 150 ℃ for 1h, adjusting the temperature to 100 ℃, drying for 2h, adjusting the temperature to 60 ℃, drying for 3h, cutting the dried ultra-high molecular weight polyethylene long fiber into short fibers with the length of 50-80 mm, and preparing the ultra-high molecular weight polyethylene short fiber;
wherein, S4: twisting the ultra-high molecular chain polyethylene short fibers into face yarns according to 25 twists/10 cm of twist, and spinning the face yarns according to the warp-wise spacing of 0.8cm and the weft-wise spacing of 1.0cm to obtain the polyethylene composite fabric.
Comparative example 2
A preparation process of a flame-retardant polyethylene composite fabric based on a metal framework comprises the following steps:
s1: coating ammonium polyphosphate with thermoplastic polyurethane elastomer to prepare microencapsulated ammonium polyphosphate;
s2: the microencapsulated ammonium polyphosphate, the ultra-high molecular weight polyethylene and the decalin are subjected to blending, extrusion, cooling, ultra-stretching and cooling to prepare the ultra-high molecular weight polyethylene long fiber;
s3: preheating, curling, multistage drying and cutting the ultra-high molecular weight polyethylene long fibers to prepare ultra-high molecular weight polyethylene short fibers;
s4: and spinning the ultra-high molecular weight polyethylene short fibers to obtain the polyethylene composite fabric.
Wherein S1: adding pentaerythritol into dimethyl sulfoxide, heating in a water bath to 45 ℃, stirring for 25min, adding toluene diisocyanate, keeping the temperature unchanged, stirring for 13min, adding 1, 4-dioxane, keeping the temperature unchanged, stirring for 13min, sequentially adding ammonium polyphosphate, 1, 4-dioxane, polyoxyethylene octyl phenol ether-10 and dibutyltin dilaurate, heating in the water bath to 85 ℃, stirring for 6h, standing for 2h, cooling to room temperature, filtering, washing with deionized water for 4 times, placing in an oven, and drying at 80 ℃ for 25min to obtain microencapsulated ammonium polyphosphate;
wherein S2: placing a metal framework, microencapsulated ammonium polyphosphate, ultra-high molecular weight polyethylene and decalin in a double-screw extruder, melt blending at the screw speed of 100r/min and the temperature of 180 ℃, extruding the mixture from a spinneret plate, cooling to room temperature, heating and stretching at the temperature of 85 ℃, heating and stretching at the temperature of 130 ℃, cooling at the temperature of 40 ℃, and cooling to room temperature to obtain ultra-high molecular weight polyethylene long fibers;
wherein, S3: preheating the ultra-high molecular chain polyethylene long fiber at 55 ℃, curling the ultra-high molecular weight polyethylene long fiber after preheating, carrying out multistage drying on the curled ultra-high molecular weight polyethylene long fiber, placing the multi-stage drying in an oven, drying at 150 ℃ for 2 hours, adjusting the temperature to 100 ℃, drying for 3 hours, adjusting the temperature to 60 ℃, drying for 4 hours, cutting the dried ultra-high molecular weight polyethylene long fiber into short fibers with the length of 50-80 mm, and preparing the ultra-high molecular weight polyethylene short fiber;
wherein, S4: twisting the ultra-high molecular chain polyethylene short fibers into face yarns according to 25 twists/10 cm of twist, and spinning the face yarns according to the warp-wise spacing of 0.8cm and the weft-wise spacing of 1.0cm to obtain the polyethylene composite fabric.
Comparative example 3
A preparation process of a flame-retardant polyethylene composite fabric based on a metal framework comprises the following steps:
s1: coating ammonium polyphosphate with thermoplastic polyurethane elastomer to prepare microencapsulated ammonium polyphosphate;
s2: the microencapsulated ammonium polyphosphate, the ultra-high molecular weight polyethylene and the decalin are subjected to blending, extrusion, cooling, ultra-stretching and cooling to prepare the ultra-high molecular weight polyethylene long fiber;
s3: preheating, curling, multistage drying and cutting the ultra-high molecular weight polyethylene long fibers to prepare ultra-high molecular weight polyethylene short fibers;
s4: and spinning the ultra-high molecular weight polyethylene short fibers to obtain the polyethylene composite fabric.
Wherein S1: adding pentaerythritol into dimethyl sulfoxide, heating in a water bath to 50 ℃, stirring for 30min, adding toluene diisocyanate, keeping the temperature unchanged, stirring for 15min, adding 1, 4-dioxane, keeping the temperature unchanged, stirring for 15min, sequentially adding ammonium polyphosphate, 1, 4-dioxane, polyoxyethylene octyl phenol ether-10 and dibutyltin dilaurate, heating in the water bath to 90 ℃, stirring for 7h, standing for 2h, cooling to room temperature, filtering, washing with deionized water for 4 times, placing in an oven, and drying at 80 ℃ for 30min to obtain microencapsulated ammonium polyphosphate;
wherein S2: placing a metal framework, microencapsulated ammonium polyphosphate, ultra-high molecular weight polyethylene and decalin in a double-screw extruder, melt blending at the screw speed of 120r/min and the temperature of 190 ℃, extruding the mixture from a spinneret plate, cooling to room temperature, heating and stretching at the temperature of 105 ℃, heating and stretching at the temperature of 150 ℃, cooling at the temperature of 50 ℃, and cooling to room temperature to obtain ultra-high molecular weight polyethylene long fibers;
wherein, S3: preheating the ultra-high molecular chain polyethylene long fiber at 60 ℃, curling the ultra-high molecular weight polyethylene long fiber after preheating, carrying out multistage drying on the curled ultra-high molecular weight polyethylene long fiber, placing the multi-stage drying in an oven, drying at 150 ℃ for 2 hours, adjusting the temperature to 100 ℃, drying for 3 hours, adjusting the temperature to 60 ℃, drying for 4 hours, cutting the dried ultra-high molecular weight polyethylene long fiber into short fibers with the length of 50-80 mm, and preparing the ultra-high molecular weight polyethylene short fiber;
wherein, S4: twisting the ultra-high molecular chain polyethylene short fibers into face yarns according to 25 twists/10 cm of twist, and spinning the face yarns according to the warp-wise spacing of 0.8cm and the weft-wise spacing of 1.0cm to obtain the polyethylene composite fabric.
Comparative example 4
A preparation process of a flame-retardant polyethylene composite fabric based on a metal framework comprises the following steps:
s1: preparing a metal framework by taking aluminum as a metal source and fumaric acid as an organic ligand;
s2: blending, extruding, cooling, super-stretching and cooling the metal framework, the ultra-high molecular weight polyethylene and the decalin to prepare the ultra-high molecular weight polyethylene long fiber;
s3: preheating, curling, multistage drying and cutting the ultra-high molecular weight polyethylene long fibers to prepare ultra-high molecular weight polyethylene short fibers;
s4: and spinning the ultra-high molecular weight polyethylene short fibers to obtain the polyethylene composite fabric.
Wherein S1: mixing sodium fumarate with deionized water to obtain solution A, mixing aluminum nitrate nonahydrate with deionized water to obtain solution B, dropwise adding the solution A into the solution B, heating to 40 ℃ in a water bath, stirring for 10min, centrifuging the solution in a centrifuge at 5000r/min for 15min, washing with deionized water for 3 times, placing in an oven, and drying at 80 ℃ for 40min to obtain a metal skeleton;
wherein S2: placing a metal framework, microencapsulated ammonium polyphosphate, ultra-high molecular weight polyethylene and decalin into a double-screw extruder, melt blending at the screw speed of 80r/min and the temperature of 170 ℃, extruding the mixture from a spinneret plate, cooling to room temperature, heating and stretching at the temperature of 65 ℃, heating and stretching at the temperature of 100 ℃, cooling at the temperature of 30 ℃, and cooling to room temperature to obtain ultra-high molecular weight polyethylene long fibers;
wherein, S3: preheating the ultra-high molecular chain polyethylene long fiber at 50 ℃, curling the ultra-high molecular weight polyethylene long fiber after preheating, carrying out multistage drying on the curled ultra-high molecular weight polyethylene long fiber, placing the multi-stage drying in an oven, drying at 150 ℃ for 1h, adjusting the temperature to 100 ℃, drying for 2h, adjusting the temperature to 60 ℃, drying for 3h, cutting the dried ultra-high molecular weight polyethylene long fiber into short fibers with the length of 50-80 mm, and preparing the ultra-high molecular weight polyethylene short fiber;
wherein, S4: twisting the ultra-high molecular chain polyethylene short fibers into face yarns according to 25 twists/10 cm of twist, and spinning the face yarns according to the warp-wise spacing of 0.8cm and the weft-wise spacing of 1.0cm to obtain the polyethylene composite fabric.
Comparative example 5
A preparation process of a flame-retardant polyethylene composite fabric based on a metal framework comprises the following steps:
s1: preparing a metal framework by taking aluminum as a metal source and fumaric acid as an organic ligand;
s2: blending, extruding, cooling, super-stretching and cooling the metal framework, the ultra-high molecular weight polyethylene and the decalin to prepare the ultra-high molecular weight polyethylene long fiber;
s3: preheating, curling, multistage drying and cutting the ultra-high molecular weight polyethylene long fibers to prepare ultra-high molecular weight polyethylene short fibers;
s4: and spinning the ultra-high molecular weight polyethylene short fibers to obtain the polyethylene composite fabric.
Wherein S1: mixing sodium fumarate with deionized water to obtain solution A, mixing aluminum nitrate nonahydrate with deionized water to obtain solution B, dropwise adding the solution A into the solution B, heating to 40 ℃ in a water bath, stirring for 13min, centrifuging the solution in a centrifuge at 6500r/min for 15min, washing with deionized water for 4 times, placing in an oven, and drying at 80 ℃ for 50min to obtain a metal skeleton;
wherein S2: placing a metal framework, microencapsulated ammonium polyphosphate, ultra-high molecular weight polyethylene and decalin in a double-screw extruder, melt blending at the screw speed of 100r/min and the temperature of 180 ℃, extruding the mixture from a spinneret plate, cooling to room temperature, heating and stretching at the temperature of 85 ℃, heating and stretching at the temperature of 130 ℃, cooling at the temperature of 40 ℃, and cooling to room temperature to obtain ultra-high molecular weight polyethylene long fibers;
wherein, S3: preheating the ultra-high molecular chain polyethylene long fiber at 55 ℃, curling the ultra-high molecular weight polyethylene long fiber after preheating, carrying out multistage drying on the curled ultra-high molecular weight polyethylene long fiber, placing the multi-stage drying in an oven, drying at 150 ℃ for 2 hours, adjusting the temperature to 100 ℃, drying for 3 hours, adjusting the temperature to 60 ℃, drying for 4 hours, cutting the dried ultra-high molecular weight polyethylene long fiber into short fibers with the length of 50-80 mm, and preparing the ultra-high molecular weight polyethylene short fiber;
wherein, S4: twisting the ultra-high molecular chain polyethylene short fibers into face yarns according to 25 twists/10 cm of twist, and spinning the face yarns according to the warp-wise spacing of 0.8cm and the weft-wise spacing of 1.0cm to obtain the polyethylene composite fabric.
Comparative example 6
A preparation process of a flame-retardant polyethylene composite fabric based on a metal framework comprises the following steps:
s1: preparing a metal framework by taking aluminum as a metal source and fumaric acid as an organic ligand;
s2: blending, extruding, cooling, super-stretching and cooling the metal framework, the ultra-high molecular weight polyethylene and the decalin to prepare the ultra-high molecular weight polyethylene long fiber;
s3: preheating, curling, multistage drying and cutting the ultra-high molecular weight polyethylene long fibers to prepare ultra-high molecular weight polyethylene short fibers;
s4: and spinning the ultra-high molecular weight polyethylene short fibers to obtain the polyethylene composite fabric.
Wherein S1: mixing sodium fumarate with deionized water to obtain solution A, mixing aluminum nitrate nonahydrate with deionized water to obtain solution B, dropwise adding the solution A into the solution B, heating to 40 ℃ in a water bath, stirring for 15min, centrifuging for 15min at 8000r/min in a centrifuge, washing with deionized water for 4 times, placing in an oven, and drying at 80 ℃ for 60min to obtain a metal skeleton;
wherein S2: placing a metal framework, microencapsulated ammonium polyphosphate, ultra-high molecular weight polyethylene and decalin in a double-screw extruder, melt blending at the screw speed of 120r/min and the temperature of 190 ℃, extruding the mixture from a spinneret plate, cooling to room temperature, heating and stretching at the temperature of 105 ℃, heating and stretching at the temperature of 150 ℃, cooling at the temperature of 50 ℃, and cooling to room temperature to obtain ultra-high molecular weight polyethylene long fibers;
wherein, S3: preheating the ultra-high molecular chain polyethylene long fiber at 60 ℃, curling the ultra-high molecular weight polyethylene long fiber after preheating, carrying out multistage drying on the curled ultra-high molecular weight polyethylene long fiber, placing the multi-stage drying in an oven, drying at 150 ℃ for 2 hours, adjusting the temperature to 100 ℃, drying for 3 hours, adjusting the temperature to 60 ℃, drying for 4 hours, cutting the dried ultra-high molecular weight polyethylene long fiber into short fibers with the length of 50-80 mm, and preparing the ultra-high molecular weight polyethylene short fiber;
wherein, S4: twisting the ultra-high molecular chain polyethylene short fibers into face yarns according to 25 twists/10 cm of twist, and spinning the face yarns according to the warp-wise spacing of 0.8cm and the weft-wise spacing of 1.0cm to obtain the polyethylene composite fabric.
Vertical burning test (UL 94)
The test samples of examples 1 to 3 and comparative examples 1 to 6 were used as test samples, a textile vertical burning tester was used for vertical burning test, and the test results were recorded according to GB/T5545-2014 test for damage length in the vertical direction of the burning properties of textiles, smoldering and after-burning time, the samples of each sample were 300X 89 mm.
Limiting oxygen index test (LOI)
The limiting oxygen index test was carried out by using the oxygen index tester with the test samples of examples 1 to 3 and comparative examples 1 to 6, and the test results were recorded according to GB/T5454-1997 oxygen index method for textile combustion Performance test, wherein the sample of each sample is 150X 58 mm.
Experimental data
According to the data, the vertical burning test grades of the examples 1-3 are all V-0, and the limiting oxygen indexes are higher than those of the comparative examples 1-6;
comparative examples 1 to 3 lack a metal skeleton as compared with examples 1 to 3; comparative examples 4 to 6 lack microencapsulated polyphosphates as compared to examples 1 to 3, and thus the flame retardant properties of comparative examples 1 to 6 are reduced.
In conclusion, the flame-retardant polyethylene composite fabric based on the metal framework and the fabric prepared by the process have good flame retardance, can isolate air, reduce heat release amount and have high industrial value.
Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present invention, and the present invention is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present invention has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. A preparation process of a flame-retardant polyethylene composite fabric based on a metal framework is characterized by comprising the following steps of: the method comprises the following steps:
s1: coating ammonium polyphosphate with thermoplastic polyurethane elastomer to prepare microencapsulated ammonium polyphosphate;
s2: preparing a metal framework by taking aluminum as a metal source and fumaric acid as an organic ligand;
s3: blending, extruding, cooling, super-stretching and cooling metal frameworks, microencapsulated ammonium polyphosphate, ultra-high molecular weight polyethylene and decalin to prepare ultra-high molecular weight polyethylene long fibers;
s4: preheating, curling, multistage drying and cutting the ultra-high molecular weight polyethylene long fibers to prepare ultra-high molecular weight polyethylene short fibers;
s5: and spinning the ultra-high molecular weight polyethylene short fibers to obtain the polyethylene composite fabric.
2. The process for preparing the flame-retardant polyethylene composite fabric based on the metal framework, which is characterized in that:
s1: adding pentaerythritol into dimethyl sulfoxide, heating in a water bath, stirring uniformly, adding toluene diisocyanate, keeping the temperature unchanged, stirring uniformly, adding 1, 4-dioxane, keeping the temperature unchanged, stirring uniformly, sequentially adding ammonium polyphosphate, 1, 4-dioxane, polyoxyethylene octyl phenol ether-10 and dibutyltin dilaurate, heating in a water bath, stirring uniformly, standing, cooling to room temperature, filtering, flushing and drying to obtain microencapsulated ammonium polyphosphate;
s2: mixing sodium fumarate with deionized water to obtain a solution A, mixing aluminum nitrate nonahydrate with deionized water to obtain a solution B, dropwise dripping the solution A into the solution B, heating in a water bath, stirring uniformly, centrifuging, washing, and drying to obtain a metal framework;
s3: placing a metal framework, microencapsulated ammonium polyphosphate, ultra-high molecular weight polyethylene and decalin in a double-screw extruder, carrying out melt blending, extrusion, cooling, super stretching and cooling to obtain ultra-high molecular weight polyethylene long fibers;
s4: preheating, curling, multistage drying and cutting the ultrahigh molecular weight polyethylene long fibers into short fibers to prepare ultrahigh molecular weight polyethylene short fibers;
s5: twisting the ultra-high molecular weight polyethylene short fibers into a veil, and spinning to obtain the polyethylene composite fabric.
3. The process for preparing the flame-retardant polyethylene composite fabric based on the metal framework, which is characterized in that:
the S1: adding pentaerythritol into dimethyl sulfoxide, heating in a water bath to 40-50 ℃, stirring for 20-30 min, adding toluene diisocyanate, keeping the temperature unchanged, stirring for 10-15 min, adding 1, 4-dioxane, keeping the temperature unchanged, stirring for 10-15 min, sequentially adding ammonium polyphosphate, 1, 4-dioxane, polyoxyethylene octyl phenol ether-10 and dibutyltin dilaurate, heating in a water bath to 80-90 ℃, stirring for 5-7 h, standing for 1-2 h, cooling to room temperature, filtering, flushing for 3-4 times with deionized water, placing in an oven, and drying at 80 ℃ for 20-30 min to obtain microencapsulated ammonium polyphosphate;
the S2: mixing sodium fumarate with deionized water to obtain a solution A, mixing aluminum nitrate nonahydrate with deionized water to obtain a solution B, dropwise adding the solution A into the solution B, heating to 40 ℃ in a water bath, stirring for 10-15 min, placing the solution in a centrifuge, centrifuging for 15min at 5000-8000 r/min, flushing 3-4 times with deionized water, placing in an oven, and drying at 80 ℃ for 40-60 min to obtain a metal framework;
the S3: placing a metal framework, microencapsulated ammonium polyphosphate, ultra-high molecular weight polyethylene and decalin into a double-screw extruder, melt-blending at the screw speed of 80-120 r/min and the temperature of 170-190 ℃, extruding the mixture from a spinneret plate, cooling to room temperature, and cooling to room temperature through a super stretching process to obtain ultra-high molecular weight polyethylene long fibers;
the S4: preheating the ultra-high molecular weight polyethylene long fiber at 50-60 ℃, curling the ultra-high molecular weight polyethylene long fiber after preheating, carrying out multistage drying on the curled ultra-high molecular weight polyethylene long fiber, placing the dried ultra-high molecular weight polyethylene long fiber in an oven, drying for 1-2 h at 150 ℃, adjusting the temperature to 100 ℃, drying for 2-3 h, adjusting the temperature to 60 ℃, drying for 3-4 h, and cutting the dried ultra-high molecular weight polyethylene long fiber into short fibers with the length of 50-80 mm to prepare ultra-high molecular weight polyethylene short fibers;
the S5: twisting the ultra-high molecular weight polyethylene short fibers into face yarns according to 25 twists/10 cm of twist, and spinning the face yarns according to the warp-wise spacing of 0.8cm and the weft-wise spacing of 1.0cm to obtain the polyethylene composite fabric.
4. The process for preparing the flame-retardant polyethylene composite fabric based on the metal framework, according to claim 3, is characterized in that: in the super stretching process, the ultra-high molecular weight polyethylene long fiber is heated and stretched at 65-105 ℃ in sequence, heated and stretched at 100-150 ℃ and cooled at 30-50 ℃.
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