CN110790998A - Ultra-light polyethylene foaming agent and preparation method and application thereof - Google Patents

Ultra-light polyethylene foaming agent and preparation method and application thereof Download PDF

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CN110790998A
CN110790998A CN201910910052.5A CN201910910052A CN110790998A CN 110790998 A CN110790998 A CN 110790998A CN 201910910052 A CN201910910052 A CN 201910910052A CN 110790998 A CN110790998 A CN 110790998A
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polyethylene
foaming agent
foam material
ultra
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严晴
周国庆
周志鑫
严一丰
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Huizhou Zhihai Xinwei Technology Co Ltd
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Huizhou Zhihai Xinwei Technology Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
    • C08J9/06—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
    • C08J9/10—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent developing nitrogen, the blowing agent being a compound containing a nitrogen-to-nitrogen bond
    • C08J9/107—Nitroso compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/0061—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof characterized by the use of several polymeric components
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/0066—Use of inorganic compounding ingredients
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2203/00—Foams characterized by the expanding agent
    • C08J2203/04—N2 releasing, ex azodicarbonamide or nitroso compound
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2323/04—Homopolymers or copolymers of ethene
    • C08J2323/06—Polyethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2423/10—Homopolymers or copolymers of propene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2479/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen with or without oxygen, or carbon only, not provided for in groups C08J2461/00 - C08J2477/00
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    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2296—Oxides; Hydroxides of metals of zinc
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
    • C08K2003/3045—Sulfates
    • C08K2003/3081—Aluminum sulfate
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/34—Silicon-containing compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
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    • C08K3/346—Clay

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Abstract

The invention discloses an ultralight polyethylene foam material which comprises the following components in parts by weight: 100 parts of polyethylene, 2-7 parts of flame retardant, 1.5-4 parts of toughening agent, 5-11 parts of foaming agent and 0.8-1.5 parts of stabilizer. The invention also discloses a preparation method of the ultralight polyethylene foam material, which is low in production cost and suitable for continuous large-scale production. The ultra-light polyethylene foam material not only can be recycled, has uniform cells, low density, strong antibacterial property and high physical heat resistance, but also can be applied to the fields of petroleum drilling fluid, cosmetics and coatings.

Description

Ultra-light polyethylene foaming agent and preparation method and application thereof
Technical Field
The invention relates to the field of macromolecules, in particular to an ultralight polyethylene foam material and a preparation method and application thereof.
Background
The foamed plastic is a microporous material having numerous bubbles inside based on a resin, and can be considered as a composite material having a gas as a filler. The foamed plastic has a plurality of varieties, has the advantages of light weight, heat insulation, sound insulation, buffering, high specific strength, low price and the like due to the large amount of bubbles, and is widely applied to the fields of daily necessities, packaging, industry, agriculture, traffic and transportation industry, military industry, aerospace industry and the like. From the aspect of using performance, compared with polypropylene, polystyrene propylene and polyurethane foaming material products, the Polyethylene (PE) foaming material is a high-crystallization composite material with excellent performance, and becomes a novel environment-friendly, pressure-resistant, buffering and heat-insulating material which is the fastest growing at present due to unique and superior performance. The polyethylene foam material has good thermal stability, and the dimensional stability of the material at high temperature is good. The polypropylene foam plastic also has the advantages of good heat resistance, chemical resistance, oil resistance and heat insulation, higher tensile strength and impact strength, higher toughness, proper and soft surface, good environmental effect, easy recovery and the like.
CN103497399B relates to a polyethylene foam material prepared by using a foaming return material, which sequentially comprises the following components in parts by weight: the composite foaming agent is prepared by processing and producing crosslinked polyethylene foaming material waste, a composite filler, a compound crosslinking agent, a compound foaming agent and a foaming auxiliary agent sequentially; the method has the advantages that: the polyethylene foam material with excellent performance is obtained by sequentially processing the crosslinked polyethylene foam material waste, mixing the raw materials, reprocessing the raw materials, cutting into sheets, compression molding and cooling and shaping according to a certain weight part of the crosslinked polyethylene foam material waste, the composite filler, the composite cross-linking agent, the composite foaming agent and the foaming auxiliary agent, so that the production cost is reduced, the environment is protected, and the resources are recycled. However, as with the aforementioned method, this method still cannot produce a high-strength antibacterial polyethylene blowing agent having a high expansion ratio and a narrow cell distribution.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, an object of the present invention is to provide an ultra-light polyethylene foam material, a method for preparing the same, and applications of the same. The ultra-light polyethylene foam material which meets the environmental protection requirement, can be recycled, has uniform foam pores, low density, strong antibacterial property, high physical heat resistance, low production cost and smooth surface and is suitable for continuous mass production, thereby meeting the requirements in the fields of petroleum drilling fluid, cosmetics and coatings.
The purpose of the invention is realized by the following technical scheme.
An ultra-light polyethylene foam material comprises the following components in parts by weight: 100 parts of polyethylene, 2-7 parts of flame retardant, 1.5-4 parts of toughening agent, 5-11 parts of foaming agent and 0.8-1.5 parts of stabilizer.
Polyethylene materials need to have good melt strength and viscoelasticity to hold cells during foaming without restricting the expansion of the cells. Due to the overlarge viscoelasticity and melt strength, the foam cells can bear large resistance when expanding, the expansion rate of the foam cells is slow, the foam cells are tiny and fine, and the foam material with high expansion ratio is difficult to obtain. And the too low viscoelasticity and melt strength are difficult to maintain, the speed of the foam cells is extremely fast and difficult to control in the expansion process, the foam cells are easy to collapse and damage, large and sparse foam cells are easy to form, and the mechanical strength of the product is also lost. Therefore, PE is suitable for the foaming process only when the melt strength of PE is high. The polyethylene matrix resin used in the present invention is selected from Low Density Polyethylene (LDPE) which has a good foaming property due to its long chain branch structure and high melt strength.
The polyethylene matrix resin is selected from low density polyethylene.
The flame retardant is inorganic clay or organic clay; wherein the organoclay is a montmorillonite modified with an amine-based organic compound.
The toughening agent is propylene polymer, 1, 3-butadiene polymer, styrene polymer and phenylpropylene polymer.
The foaming agent is one of an azo foaming agent, a nitroso foaming agent or a hydrazide foaming agent.
The stabilizer is calcium zinc stabilizer, organic tin stabilizer and aluminum sulfate.
The composite antibacterial agent is a polyguanidine/polysilicate composite antibacterial agent, and is obtained by mixing an aqueous solution of water-soluble polyguanidine inorganic acid salt or organic acid salt and an aqueous solution of water-soluble silicate and then adding an aqueous solution of water-soluble metal salt; the molar ratio of the water-soluble polyguanidine inorganic acid salt or organic acid salt to the water-soluble silicate is 5: 1-1: 30; the molar ratio of the water-soluble silicate to the water-soluble metal salt is 3: 1-1: 2.
The water-soluble polyguanidine inorganic acid salt or organic acid salt is selected from at least one of the following substances: polyhexamethylene (bis) guanidine hydrochloride, polyhexamethylene guanidine propionate, polyhexamethylene (bis) guanidine carbonate, or water-soluble polyoxyethylene guanidine inorganic and organic acid salts, and water-soluble polyguanidine of other structures, and the like. Among them, polyhexamethylene guanidine propionate is preferable.
The water-soluble silicate used in the composite antibacterial agent of the invention is selected from sodium silicate and potassium silicate. The water-soluble metal salt is selected from Al3+Salt, Cu2+Salt of Fe2+Salt, Ag+Salt, Ce3+Salts, such as: al (NO)3)3，Cu(NO3)2，Fe(NO3)2，AgNO3，Fe(NO3)2，Ce(NO3)3And the like. In view of the color of the article, light colored metal salts are preferred, such as: al (Al)3+Salt, Ce3+Salts and the like. One of them may be added during use.
The more specific preparation steps of the composite antibacterial agent are as follows: (1) dissolving a certain amount of water-soluble polyguanidine inorganic acid salt or organic acid salt in a certain amount of water, and obtaining a solution A; (2) weighing a certain amount of soluble silicate, and dissolving the soluble silicate in water to obtain solution B; (3) mixing the solution A and the solution B to form a solution C, and stirring for a certain period of 30-60 min; (4) weighing a certain amount of water-soluble metal salt, and dissolving the water-soluble metal salt in water to obtain a solution D; (5) and (3) gradually adding the solution D into the solution C, namely generating flocculent insoluble precipitate, and performing suction filtration, washing, drying and crushing on the precipitate to obtain the polyguanidine/polysilicate composite antibacterial agent.
In the preparation process of the composite antibacterial agent, the ratio of the polyguanidine to the silicate to the water-soluble metal salt can be adjusted according to the requirement. Wherein, the molar ratio of the water-soluble polyguanidine inorganic acid salt or organic acid salt to the water-soluble silicate can be adjusted in a wide range, and the preferred molar ratio is 5: 1-1: 30. If the ratio is greater than 5:1, i.e., the amount of polyguanidine used is too large, the yield of polyguanidine in the aqueous polyguanidine solution converted into hydrophobic polyguanidine/polysilicate decreases, and most of the polyguanidine remains present in the aqueous solution in a water-soluble state; if the ratio is less than 1:30, i.e., the amount of silicate is too large, the amount of the effective antibacterial ingredient, i.e., polyguanidine, in the polyguanidine/polysilicate prepared is too low, resulting in too low antibacterial efficiency.
The molar ratio of the water-soluble silicate to the water-soluble metal salt can also be adjusted within a wide range, and the preferred molar ratio is 3: 1-1: 2. If the ratio is greater than 3:1, i.e., the relative proportion of metal salt is too low, flocculation will be reduced, resulting in a reduced yield of polyguanidine/polysilicate; if the ratio is less than 1:2, i.e., the ratio of metal salts is relatively excessive, unnecessary waste is caused.
In the preparation step (3), the solution A and the solution B are mixed and stirred to form the solution C, and the stirring time is preferably 8-50 min. Of course, the stirring time is not limited to this range, but if the stirring time is too short, the solution B is difficult to be hydrolyzed into polysilicic acid or the polymerization degree is not large enough, so that the polysilicic acid and the polyguanidine are not entangled in the aqueous solution to a sufficient degree, and the polyguanidine is not hydrophobic enough, and if the stirring time is too long, more than 50min, the stirring time is wasted. In the preparation step (4), the solution D should be slowly poured into the mixed solution C with vigorous stirring, so that the particle size of the polyguanidine/polysilicate particles produced can be made smaller.
In addition, the preparation process of the composite antibacterial agent can be carried out at room temperature or can be carried out by heating. The heating makes the speed of the silicate hydrolysis to the polysilicic acid faster, and the reaction process is accelerated. The insoluble precipitate formed at the end of the reaction can be purified by suction filtration or can be left for a period of time, the precipitate can be precipitated from water to the bottom of the container, the upper layer of water liquid is drained, and the lower layer of precipitate is collected, dried and crushed. Therefore, the preparation method of the composite antibacterial agent is simple and easy to implement, the reaction conditions are mild, and the industrial production is easy to realize. And the antibacterial effect of 99 percent can be achieved when the addition amount of the composite antibacterial agent in a polymer system is low.
Preferably, the composite antibacterial agent contains 2-6 parts.
A preparation method of an ultralight polyethylene foam material comprises the following steps:
1) adding polyethylene, a flame retardant, a toughening agent and a stabilizer into a high-speed mixer for mixing, and then adding the mixture into a double-screw extruder for extrusion and granulation to prepare a polyethylene material A;
2) adding a foaming agent and a foaming auxiliary agent into a high-speed mixer for mixing, and then adding the mixture into a double-screw extruder for extrusion and granulation to prepare a foaming agent B;
3) the polyethylene material A and the foaming agent B are uniformly mixed, and the ultra-light polyethylene foam material is prepared by adopting an injection molding method under the condition of secondary mold opening.
An ultralight polyethylene foam material can be applied to the fields of petroleum drilling fluid, cosmetics and coatings.
The invention has the advantages that:
1. the invention meets the requirement of environmental protection, can be recycled, has uniform foam pores, low density, strong antibacterial property and high physical heat resistance.
2. The invention has low production cost and is suitable for continuous large-scale production.
Detailed Description
The following raw materials are specifically as follows:
the nitroso foaming agent is dinitrosopentamethylenetetramine.
The preparation method of the polyguanidine/polysilicate composite antibacterial agent comprises the following steps:
(1) weighing 20% of polyhexamethylene guanidine propionate aqueous solution A by mass fraction; (2) weighing 10% by mass of sodium silicate aqueous solution B; (3) mixing solution A and solution BMixing to form solution C, and stirring for 30 min; (4) weighing AgNO with the mass fraction of 10%3An aqueous solution D; (5) gradually adding the solution D into the solution C, generating flocculent insoluble precipitate, carrying out suction filtration, washing, drying and crushing on the precipitate to obtain the polyguanidine/polysilicate composite antibacterial agent;
wherein the molar ratio of the polyhexamethylene guanidine propionate to the sodium silicate is 1: 1; the sodium silicate and AgNO3Is 1: 1.
Example 1
1) Adding 100 parts of low-density polyethylene, 2 parts of inorganic clay, 1.5 parts of propylene polymer and 0.8 part of aluminum sulfate into a high-speed mixer for mixing, stirring at 600 revolutions per minute for 60min, and then adding into a double-screw extruder at 200 ℃ for extrusion and granulation to prepare a polyethylene material A;
2) adding 5 parts of nitroso foaming agent and 0.2 part of zinc oxide into a high-speed mixer at 120 ℃ for mixing, and then adding into a double-screw extruder for extrusion and granulation to prepare foaming agent B;
3) the polyethylene material A and the foaming agent B are uniformly mixed, and the ultra-light polyethylene foam material is prepared at 160 ℃ by adopting an injection molding method.
Example 2
1) Adding 100 parts of low-density polyethylene, 7 parts of inorganic clay, 1.5 parts of propylene polymer and 0.8 part of aluminum sulfate into a high-speed mixer for mixing, stirring at 600 revolutions per minute for 60min, and then adding into a double-screw extruder at 200 ℃ for extrusion and granulation to prepare a polyethylene material A;
2) adding 5 parts of nitroso foaming agent and 0.2 part of zinc oxide into a high-speed mixer at 120 ℃ for mixing, and then adding into a double-screw extruder for extrusion and granulation to prepare foaming agent B;
3) the polyethylene material A and the foaming agent B are uniformly mixed, and the ultra-light polyethylene foam material is prepared at 160 ℃ by adopting an injection molding method.
Example 3
1) Adding 100 parts of low-density polyethylene, 2 parts of inorganic clay, 4 parts of propylene polymer and 0.8 part of aluminum sulfate into a high-speed mixer, mixing, stirring at 600 revolutions per minute for 60min, and then adding into a 200 ℃ double-screw extruder for extrusion granulation to prepare a polyethylene material A;
2) adding 5 parts of nitroso foaming agent and 0.2 part of zinc oxide into a high-speed mixer at 120 ℃ for mixing, and then adding into a double-screw extruder for extrusion and granulation to prepare foaming agent B;
3) the polyethylene material A and the foaming agent B are uniformly mixed, and the ultra-light polyethylene foam material is prepared at 160 ℃ by adopting an injection molding method.
Example 4
1) Adding 100 parts of low-density polyethylene, 2 parts of inorganic clay, 1.5 parts of propylene polymer and 1.5 parts of aluminum sulfate into a high-speed mixer for mixing, stirring at 600 revolutions per minute for 60min, and then adding into a double-screw extruder at 200 ℃ for extrusion and granulation to prepare a polyethylene material A;
2) adding 5 parts of nitroso foaming agent and 0.2 part of zinc oxide into a high-speed mixer at 120 ℃ for mixing, and then adding into a double-screw extruder for extrusion and granulation to prepare foaming agent B;
3) the polyethylene material A and the foaming agent B are uniformly mixed, and the ultra-light polyethylene foam material is prepared at 160 ℃ by adopting an injection molding method.
Example 5
1) Adding 100 parts of low-density polyethylene, 2 parts of inorganic clay, 1.5 parts of propylene polymer and 0.8 part of aluminum sulfate into a high-speed mixer for mixing, stirring at 600 revolutions per minute for 60min, and then adding into a double-screw extruder at 200 ℃ for extrusion and granulation to prepare a polyethylene material A;
2) adding 11 parts of nitroso foaming agent and 0.2 part of zinc oxide into a high-speed mixer at 120 ℃ for mixing, and then adding into a double-screw extruder for extrusion granulation to prepare foaming agent B;
3) the polyethylene material A and the foaming agent B are uniformly mixed, and the ultra-light polyethylene foam material is prepared at 160 ℃ by adopting an injection molding method.
Example 6
1) Adding 100 parts of low-density polyethylene, 7 parts of inorganic clay, 4 parts of propylene polymer and 0.8 part of aluminum sulfate into a high-speed mixer, mixing, stirring at 600 revolutions per minute for 60min, and then adding into a 200 ℃ double-screw extruder for extrusion granulation to prepare a polyethylene material A;
2) adding 5 parts of nitroso foaming agent and 0.2 part of zinc oxide into a high-speed mixer at 120 ℃ for mixing, and then adding into a double-screw extruder for extrusion and granulation to prepare foaming agent B;
3) the polyethylene material A and the foaming agent B are uniformly mixed, and the ultra-light polyethylene foam material is prepared at 160 ℃ by adopting an injection molding method.
Example 7
1) Adding 100 parts of low-density polyethylene, 7 parts of inorganic clay, 4 parts of propylene polymer and 1.5 parts of aluminum sulfate into a high-speed mixer, mixing, stirring at 600 revolutions per minute for 60min, and then adding into a 200 ℃ double-screw extruder for extrusion granulation to prepare a polyethylene material A;
2) adding 5 parts of nitroso foaming agent and 0.2 part of zinc oxide into a high-speed mixer at 120 ℃ for mixing, and then adding into a double-screw extruder for extrusion and granulation to prepare foaming agent B;
3) the polyethylene material A and the foaming agent B are uniformly mixed, and the ultra-light polyethylene foam material is prepared at 160 ℃ by adopting an injection molding method.
Example 8
1) Adding 100 parts of low-density polyethylene, 7 parts of inorganic clay, 4 parts of propylene polymer and 1.5 parts of aluminum sulfate into a high-speed mixer, mixing, stirring at 600 revolutions per minute for 60min, and then adding into a 200 ℃ double-screw extruder for extrusion granulation to prepare a polyethylene material A;
2) adding 11 parts of nitroso foaming agent and 0.2 part of zinc oxide into a high-speed mixer at 120 ℃ for mixing, and then adding into a double-screw extruder for extrusion granulation to prepare foaming agent B;
3) the polyethylene material A and the foaming agent B are uniformly mixed, and the ultra-light polyethylene foam material is prepared at 160 ℃ by adopting an injection molding method.
Example 9
1) 100 parts of low-density polyethylene, 2 parts of inorganic clay, 1.5 parts of propylene polymer, 0.8 part of aluminum sulfate and 2 parts of polyguanidine/polysilicate composite antibacterial agent are added into a high-speed mixer to be mixed, stirred for 60min at 600 revolutions per minute and then added into a double-screw extruder at 200 ℃ to be extruded and granulated to prepare a polyethylene material A;
2) adding 5 parts of nitroso foaming agent and 0.2 part of zinc oxide into a high-speed mixer at 120 ℃ for mixing, and then adding into a double-screw extruder for extrusion and granulation to prepare foaming agent B;
3) the polyethylene material A and the foaming agent B are uniformly mixed, and the ultra-light polyethylene foam material is prepared at 160 ℃ by adopting an injection molding method.
Example 10
1) 100 parts of low-density polyethylene, 2 parts of inorganic clay, 1.5 parts of propylene polymer, 0.8 part of aluminum sulfate and 6 parts of polyguanidine/polysilicate composite antibacterial agent are added into a high-speed mixer to be mixed, stirred for 60min at 600 revolutions per minute and then added into a double-screw extruder at 200 ℃ to be extruded and granulated to prepare a polyethylene material A;
2) adding 5 parts of nitroso foaming agent and 0.2 part of zinc oxide into a high-speed mixer at 120 ℃ for mixing, and then adding into a double-screw extruder for extrusion and granulation to prepare foaming agent B;
3) the polyethylene material A and the foaming agent B are uniformly mixed, and the ultra-light polyethylene foam material is prepared at 160 ℃ by adopting an injection molding method.
Example 11
1) 100 parts of low-density polyethylene, 7 parts of inorganic clay, 4 parts of propylene polymer, 1.5 parts of aluminum sulfate and 2 parts of polyguanidine/polysilicate composite antibacterial agent are added into a high-speed mixer to be mixed, stirred for 60min at 600 revolutions per minute and then added into a double-screw extruder at 200 ℃ to be extruded and granulated to prepare a polyethylene material A;
2) adding 11 parts of nitroso foaming agent and 0.2 part of zinc oxide into a high-speed mixer at 120 ℃ for mixing, and then adding into a double-screw extruder for extrusion granulation to prepare foaming agent B;
3) the polyethylene material A and the foaming agent B are uniformly mixed, and the ultra-light polyethylene foam material is prepared at 160 ℃ by adopting an injection molding method.
Example 12
1) 100 parts of low-density polyethylene, 7 parts of inorganic clay, 4 parts of propylene polymer, 1.5 parts of aluminum sulfate and 6 parts of polyguanidine/polysilicate composite antibacterial agent are added into a high-speed mixer to be mixed, stirred for 60min at 600 revolutions per minute and then added into a double-screw extruder at 200 ℃ to be extruded and granulated to prepare a polyethylene material A;
2) adding 11 parts of nitroso foaming agent and 0.2 part of zinc oxide into a high-speed mixer at 120 ℃ for mixing, and then adding into a double-screw extruder for extrusion granulation to prepare foaming agent B;
3) the polyethylene material A and the foaming agent B are uniformly mixed, and the ultra-light polyethylene foam material is prepared at 160 ℃ by adopting an injection molding method.
Comparative example 1
1) 100 parts of polyethylene, 2 parts of inorganic clay, 1.5 parts of propylene polymer and 0.8 part of aluminum sulfate are added into a high-speed mixer to be mixed, stirred for 60min at 600 revolutions per minute and then added into a double-screw extruder at 200 ℃ to be extruded and granulated to prepare a polyethylene material A;
2) adding 5 parts of nitroso foaming agent and 0.2 part of zinc oxide into a high-speed mixer at 120 ℃ for mixing, and then adding into a double-screw extruder for extrusion and granulation to prepare foaming agent B;
3) the polyethylene material A and the foaming agent B are uniformly mixed, and the ultra-light polyethylene foam material is prepared at 160 ℃ by adopting an injection molding method.
Comparative example 2
1) 100 parts of polyethylene, 7 parts of inorganic clay, 1.5 parts of propylene polymer and 0.8 part of aluminum sulfate are added into a high-speed mixer to be mixed, stirred for 60min at 600 revolutions per minute and then added into a double-screw extruder at 200 ℃ to be extruded and granulated to prepare a polyethylene material A;
2) adding 5 parts of nitroso foaming agent and 0.2 part of zinc oxide into a high-speed mixer at 120 ℃ for mixing, and then adding into a double-screw extruder for extrusion and granulation to prepare foaming agent B;
3) the polyethylene material A and the foaming agent B are uniformly mixed, and the ultra-light polyethylene foam material is prepared at 160 ℃ by adopting an injection molding method.
Comparative example 3
1) Adding 100 parts of polyethylene, 2 parts of inorganic clay, 4 parts of propylene polymer and 0.8 part of aluminum sulfate into a high-speed mixer, mixing, stirring at 600 revolutions per minute for 60min, and then adding into a 200 ℃ double-screw extruder for extrusion granulation to prepare a polyethylene material A;
2) adding 5 parts of nitroso foaming agent and 0.2 part of zinc oxide into a high-speed mixer at 120 ℃ for mixing, and then adding into a double-screw extruder for extrusion and granulation to prepare foaming agent B;
3) the polyethylene material A and the foaming agent B are uniformly mixed, and the ultra-light polyethylene foam material is prepared at 160 ℃ by adopting an injection molding method.
Comparative example 4
1) 100 parts of polyethylene, 2 parts of inorganic clay, 1.5 parts of propylene polymer and 1.5 parts of aluminum sulfate are added into a high-speed mixer to be mixed, stirred for 60min at 600 revolutions per minute and then added into a double-screw extruder at 200 ℃ to be extruded and granulated to prepare a polyethylene material A;
2) adding 5 parts of nitroso foaming agent and 0.2 part of zinc oxide into a high-speed mixer at 120 ℃ for mixing, and then adding into a double-screw extruder for extrusion and granulation to prepare foaming agent B;
3) the polyethylene material A and the foaming agent B are uniformly mixed, and the ultra-light polyethylene foam material is prepared at 160 ℃ by adopting an injection molding method.
Comparative example 5
1) 100 parts of polyethylene, 2 parts of inorganic clay, 1.5 parts of propylene polymer and 0.8 part of aluminum sulfate are added into a high-speed mixer to be mixed, stirred for 60min at 600 revolutions per minute and then added into a double-screw extruder at 200 ℃ to be extruded and granulated to prepare a polyethylene material A;
2) adding 11 parts of nitroso foaming agent and 0.2 part of zinc oxide into a high-speed mixer at 120 ℃ for mixing, and then adding into a double-screw extruder for extrusion granulation to prepare foaming agent B;
3) the polyethylene material A and the foaming agent B are uniformly mixed, and the ultra-light polyethylene foam material is prepared at 160 ℃ by adopting an injection molding method.
Comparative example 6
1) Adding 100 parts of polyethylene, 7 parts of inorganic clay, 4 parts of propylene polymer and 0.8 part of aluminum sulfate into a high-speed mixer, mixing, stirring at 600 revolutions per minute for 60min, and then adding into a 200 ℃ double-screw extruder for extrusion granulation to prepare a polyethylene material A;
2) adding 5 parts of nitroso foaming agent and 0.2 part of zinc oxide into a high-speed mixer at 120 ℃ for mixing, and then adding into a double-screw extruder for extrusion and granulation to prepare foaming agent B;
3) the polyethylene material A and the foaming agent B are uniformly mixed, and the ultra-light polyethylene foam material is prepared at 160 ℃ by adopting an injection molding method.
Comparative example 7
1) Adding 100 parts of polyethylene, 7 parts of inorganic clay, 4 parts of propylene polymer and 1.5 parts of aluminum sulfate into a high-speed mixer, mixing, stirring at 600 revolutions per minute for 60min, and then adding into a 200 ℃ double-screw extruder for extrusion granulation to prepare a polyethylene material A;
2) adding 5 parts of nitroso foaming agent and 0.2 part of zinc oxide into a high-speed mixer at 120 ℃ for mixing, and then adding into a double-screw extruder for extrusion and granulation to prepare foaming agent B;
3) the polyethylene material A and the foaming agent B are uniformly mixed, and the ultra-light polyethylene foam material is prepared at 160 ℃ by adopting an injection molding method.
Comparative example 8
1) Adding 100 parts of polyethylene, 7 parts of inorganic clay, 4 parts of propylene polymer and 1.5 parts of aluminum sulfate into a high-speed mixer, mixing, stirring at 600 revolutions per minute for 60min, and then adding into a 200 ℃ double-screw extruder for extrusion granulation to prepare a polyethylene material A;
2) adding 11 parts of nitroso foaming agent and 0.2 part of zinc oxide into a high-speed mixer at 120 ℃ for mixing, and then adding into a double-screw extruder for extrusion granulation to prepare foaming agent B;
3) the polyethylene material A and the foaming agent B are uniformly mixed, and the ultra-light polyethylene foam material is prepared at 160 ℃ by adopting an injection molding method.
Comparative example 9
1) 100 parts of polyethylene, 2 parts of inorganic clay, 1.5 parts of propylene polymer, 0.8 part of aluminum sulfate and 2 parts of polyguanidine/polysilicate composite antibacterial agent are added into a high-speed mixer to be mixed, stirred for 60min at 600 revolutions per minute and then added into a double-screw extruder at 200 ℃ to be extruded and granulated to prepare a polyethylene material A;
2) adding 5 parts of nitroso foaming agent and 0.2 part of zinc oxide into a high-speed mixer at 120 ℃ for mixing, and then adding into a double-screw extruder for extrusion and granulation to prepare foaming agent B;
3) the polyethylene material A and the foaming agent B are uniformly mixed, and the ultra-light polyethylene foam material is prepared at 160 ℃ by adopting an injection molding method.
Comparative example 10
1) 100 parts of polyethylene, 2 parts of inorganic clay, 1.5 parts of propylene polymer, 0.8 part of aluminum sulfate and 6 parts of polyguanidine/polysilicate composite antibacterial agent are added into a high-speed mixer to be mixed, stirred for 60min at 600 revolutions per minute and then added into a double-screw extruder at 200 ℃ to be extruded and granulated to prepare a polyethylene material A;
2) adding 5 parts of nitroso foaming agent and 0.2 part of zinc oxide into a high-speed mixer at 120 ℃ for mixing, and then adding into a double-screw extruder for extrusion and granulation to prepare foaming agent B;
3) the polyethylene material A and the foaming agent B are uniformly mixed, and the ultra-light polyethylene foam material is prepared at 160 ℃ by adopting an injection molding method.
Comparative example 11
1) 100 parts of polyethylene, 7 parts of inorganic clay, 4 parts of propylene polymer, 1.5 parts of aluminum sulfate and 2 parts of polyguanidine/polysilicate composite antibacterial agent are added into a high-speed mixer to be mixed, stirred for 60min at 600 revolutions per minute and then added into a double-screw extruder at 200 ℃ to be extruded and granulated to prepare a polyethylene material A;
2) adding 11 parts of nitroso foaming agent and 0.2 part of zinc oxide into a high-speed mixer at 120 ℃ for mixing, and then adding into a double-screw extruder for extrusion granulation to prepare foaming agent B;
3) the polyethylene material A and the foaming agent B are uniformly mixed, and the ultra-light polyethylene foam material is prepared at 160 ℃ by adopting an injection molding method.
Comparative example 12
1) 100 parts of polyethylene, 7 parts of inorganic clay, 4 parts of propylene polymer, 1.5 parts of aluminum sulfate and 6 parts of polyguanidine/polysilicate composite antibacterial agent are added into a high-speed mixer to be mixed, stirred for 60min at 600 revolutions per minute and then added into a double-screw extruder at 200 ℃ to be extruded and granulated to prepare a polyethylene material A;
2) adding 11 parts of nitroso foaming agent and 0.2 part of zinc oxide into a high-speed mixer at 120 ℃ for mixing, and then adding into a double-screw extruder for extrusion granulation to prepare foaming agent B;
3) the polyethylene material A and the foaming agent B are uniformly mixed, and the ultra-light polyethylene foam material is prepared at 160 ℃ by adopting an injection molding method.
Performance evaluation method
And (3) testing the density: the densities of the polypropylene base resin and the polypropylene foamed sheet were obtained by draining using a density attachment of a Satorius balance. The foaming ratio of the obtained polypropylene foaming material is calculated by a formula: where b is the expansion ratio ρ 1/ρ 2, ρ 1 is the density of the polypropylene base resin, and ρ 2 is the apparent density of the foam.
And (3) testing the bending property: according to ISO 178 standard.
And (3) testing the flame retardant property: according to the UL-94 standard.
Antibacterial test standard: QB/T2591-2003A test method for antibacterial property and antibacterial effect of antibacterial plastic
Detection bacteria:
1) escherichia coli (Escherichia coli) ATCC 25922
2) Staphylococcus aureus (Staphylococcus aureus) ATCC 6538
Boiling antibacterial test: the swatches were placed in 50 ℃ water and soaked for 16 hours, after which they were removed for the above-described antibacterial test.
TABLE 1
Figure BDA0002213571540000171
TABLE 2
Figure BDA0002213571540000181
Figure BDA0002213571540000191
TABLE 3
Figure BDA0002213571540000201

Claims (10)

1. An ultralight polyethylene foam material is characterized in that: comprises the following components in parts by weight: 100 parts of polyethylene, 2-7 parts of flame retardant, 1.5-4 parts of toughening agent, 5-11 parts of foaming agent and 0.8-1.5 parts of stabilizer.
2. The ultra-light polyethylene foam material as claimed in claim 1, wherein: the polyethylene matrix resin is selected from low density polyethylene.
3. An ultra-light polyethylene foam material according to any one of claims 1-2, characterized in that: the flame retardant is inorganic clay or organic clay; wherein the organoclay is a montmorillonite modified with an amine-based organic compound.
4. An ultra-light polyethylene foam material according to any one of claims 1-2, characterized in that: the toughening agent is propylene polymer, 1, 3-butadiene polymer, styrene polymer and phenylpropylene polymer.
5. An ultra-light polyethylene foam material according to any one of claims 1-2, characterized in that: the foaming agent is one of an azo foaming agent, a nitroso foaming agent or a hydrazide foaming agent.
6. An ultra-light polyethylene foam material according to any one of claims 1-2, characterized in that: the stabilizer is calcium zinc stabilizer, organic tin stabilizer and aluminum sulfate.
7. An ultra-light polyethylene foam material according to any one of claims 1-2, characterized in that: the composite antibacterial agent is a polyguanidine/polysilicate composite antibacterial agent, and is obtained by mixing an aqueous solution of water-soluble polyguanidine inorganic acid salt or organic acid salt and an aqueous solution of water-soluble silicate and then adding an aqueous solution of water-soluble metal salt; the molar ratio of the water-soluble polyguanidine inorganic acid salt or organic acid salt to the water-soluble silicate is 5:1~1: 30; the molar ratio of the water-soluble silicate to the water-soluble metal salt is 3:1~1:2。
8. The ultra-light polyethylene foam material as claimed in claim 7, wherein: contains 2-6 parts of composite antibacterial agent.
9. A preparation method of an ultralight polyethylene foam material is characterized by comprising the following steps: the method comprises the following steps:
1) adding polyethylene, a flame retardant, a toughening agent and a stabilizer into a high-speed mixer for mixing, and then adding the mixture into a double-screw extruder for extrusion and granulation to prepare a polyethylene material A;
2) adding a foaming agent and a foaming auxiliary agent into a high-speed mixer for mixing, and then adding the mixture into a double-screw extruder for extrusion and granulation to prepare a foaming agent B;
3) the polyethylene material A and the foaming agent B are uniformly mixed, and the ultra-light polyethylene foam material is prepared by adopting an injection molding method under the condition of secondary mold opening.
10. An ultralight polyethylene foam material is characterized in that: can be applied to the fields of petroleum drilling fluid, cosmetics and paint.
CN201910910052.5A 2019-09-24 2019-09-24 Ultra-light polyethylene foaming agent and preparation method and application thereof Pending CN110790998A (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102286164A (en) * 2010-06-18 2011-12-21 中国石油化工股份有限公司 Antibacterial polyethylene foamed plastic and preparation method thereof
CN108976569A (en) * 2018-08-23 2018-12-11 合肥金菱电器有限公司 A kind of EPE pearl wool and preparation method thereof
CN109666307A (en) * 2018-11-28 2019-04-23 新沂市大明科技开发有限公司 A kind of manufacturing method of composite building material

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102286164A (en) * 2010-06-18 2011-12-21 中国石油化工股份有限公司 Antibacterial polyethylene foamed plastic and preparation method thereof
CN108976569A (en) * 2018-08-23 2018-12-11 合肥金菱电器有限公司 A kind of EPE pearl wool and preparation method thereof
CN109666307A (en) * 2018-11-28 2019-04-23 新沂市大明科技开发有限公司 A kind of manufacturing method of composite building material

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