CN113088010A - Preparation method of EPS foam product - Google Patents
Preparation method of EPS foam product Download PDFInfo
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- CN113088010A CN113088010A CN202110296235.XA CN202110296235A CN113088010A CN 113088010 A CN113088010 A CN 113088010A CN 202110296235 A CN202110296235 A CN 202110296235A CN 113088010 A CN113088010 A CN 113088010A
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- 239000006260 foam Substances 0.000 title claims abstract description 46
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- OFBQJSOFQDEBGM-UHFFFAOYSA-N Pentane Chemical compound CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000004793 Polystyrene Substances 0.000 claims abstract description 29
- 229920002223 polystyrene Polymers 0.000 claims abstract description 29
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000002245 particle Substances 0.000 claims abstract description 20
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 16
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims abstract description 16
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000005187 foaming Methods 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 11
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 claims abstract description 11
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 10
- ZNQVEEAIQZEUHB-UHFFFAOYSA-N 2-ethoxyethanol Chemical compound CCOCCO ZNQVEEAIQZEUHB-UHFFFAOYSA-N 0.000 claims abstract description 9
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 8
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 8
- 239000001506 calcium phosphate Substances 0.000 claims abstract description 8
- 229910000389 calcium phosphate Inorganic materials 0.000 claims abstract description 8
- 235000011010 calcium phosphates Nutrition 0.000 claims abstract description 8
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 8
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 claims abstract description 8
- 238000005520 cutting process Methods 0.000 claims abstract description 7
- 238000004519 manufacturing process Methods 0.000 claims abstract description 6
- 238000000465 moulding Methods 0.000 claims abstract description 4
- 239000000203 mixture Substances 0.000 claims description 27
- 238000010438 heat treatment Methods 0.000 claims description 24
- 238000006243 chemical reaction Methods 0.000 claims description 18
- 238000001816 cooling Methods 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims description 6
- 238000011049 filling Methods 0.000 claims description 6
- 238000006116 polymerization reaction Methods 0.000 claims description 6
- 229920006395 saturated elastomer Polymers 0.000 claims description 5
- WFUGQJXVXHBTEM-UHFFFAOYSA-N 2-hydroperoxy-2-(2-hydroperoxybutan-2-ylperoxy)butane Chemical compound CCC(C)(OO)OOC(C)(CC)OO WFUGQJXVXHBTEM-UHFFFAOYSA-N 0.000 claims description 3
- 239000004342 Benzoyl peroxide Substances 0.000 claims description 3
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 claims description 3
- 239000011324 bead Substances 0.000 claims description 3
- 235000019400 benzoyl peroxide Nutrition 0.000 claims description 3
- ZFMQKOWCDKKBIF-UHFFFAOYSA-N bis(3,5-difluorophenyl)phosphane Chemical compound FC1=CC(F)=CC(PC=2C=C(F)C=C(F)C=2)=C1 ZFMQKOWCDKKBIF-UHFFFAOYSA-N 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- WNAHIZMDSQCWRP-UHFFFAOYSA-N dodecane-1-thiol Chemical compound CCCCCCCCCCCCS WNAHIZMDSQCWRP-UHFFFAOYSA-N 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- GJBRNHKUVLOCEB-UHFFFAOYSA-N tert-butyl benzenecarboperoxoate Chemical compound CC(C)(C)OOC(=O)C1=CC=CC=C1 GJBRNHKUVLOCEB-UHFFFAOYSA-N 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000002671 adjuvant Substances 0.000 claims 1
- 238000005452 bending Methods 0.000 abstract description 8
- 230000006835 compression Effects 0.000 abstract description 6
- 238000007906 compression Methods 0.000 abstract description 6
- 238000010008 shearing Methods 0.000 abstract description 4
- 230000000052 comparative effect Effects 0.000 description 37
- 238000009413 insulation Methods 0.000 description 5
- 238000004321 preservation Methods 0.000 description 4
- 230000035882 stress Effects 0.000 description 4
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 3
- 230000005489 elastic deformation Effects 0.000 description 3
- 239000003063 flame retardant Substances 0.000 description 3
- 238000012669 compression test Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000013475 authorization Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
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- 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
- C08J9/12—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 physical blowing agent
- C08J9/14—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 physical blowing agent organic
- C08J9/141—Hydrocarbons
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- C—CHEMISTRY; METALLURGY
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- 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
- C08J9/0014—Use of organic additives
- C08J9/0023—Use of organic additives containing oxygen
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- C—CHEMISTRY; METALLURGY
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- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0014—Use of organic additives
- C08J9/0033—Use of organic additives containing sulfur
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- 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
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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
- C08J9/0066—Use of inorganic compounding ingredients
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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
- C08J9/0095—Mixtures of at least two compounding ingredients belonging to different one-dot groups
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- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/14—Saturated hydrocarbons, e.g. butane; Unspecified hydrocarbons
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2325/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Derivatives of such polymers
- C08J2325/02—Homopolymers or copolymers of hydrocarbons
- C08J2325/04—Homopolymers or copolymers of styrene
- C08J2325/06—Polystyrene
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- C08J2429/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Derivatives of such polymer
- C08J2429/02—Homopolymers or copolymers of unsaturated alcohols
- C08J2429/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
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- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
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Abstract
The invention relates to the technical field of EPS foam production, and discloses a preparation method of an EPS foam product, which comprises the following components: 60-70 parts of polystyrene particles, 20-25 parts of benzene, 60-70 parts of absolute ethyl alcohol, 20-22 parts of ethylene glycol ethyl ether, 8-10 parts of soluble pentane and 5-6 parts of brominated polystyrene, wherein the preparation method comprises the following steps: s1, foaming; s2, curing; s3, molding; and S4, cutting. The invention is composed of polystyrene particles, benzene, absolute ethyl alcohol, ethylene glycol ethyl ether, soluble pentane and brominated polystyrene, wherein the polystyrene particles are composed of sodium dodecyl benzene sulfonate, polyvinyl alcohol, calcium phosphate, styrene, an auxiliary agent and calcium carbonate, so that the polystyrene particles have excellent tensile, shearing, bending and compression resistance properties, are not easily damaged by external force in the using process, have longer service life, have large linear elasticity change range, have good elasticity and can bear larger pressure.
Description
Technical Field
The invention relates to the technical field of EPS foam production, in particular to a preparation method of an EPS foam product.
Background
The EPS foam is a white object formed by heating polystyrene foaming particles containing a volatile liquid foaming agent through a preheated mold, has the structural characteristics of micro-closed pores and the like, has the advantages of light weight, shock resistance, falling prevention, heat insulation, sound absorption, heat preservation, self extinguishment, environmental protection, ageing resistance, low cost and convenient construction, is widely applied to the building and packaging industries, and is mainly applied to various aspects such as building wall bodies, roof heat preservation, composite board heat preservation, refrigeration houses, air conditioners, vehicles, ship heat preservation and heat insulation, floor heating, decoration and carving and the like.
Chinese patent discloses a preparation method of a flame-retardant EPS foam heat-insulation board and a board (with an authorization publication number of CN104086913B), the heat conductivity coefficient of the flame-retardant EPS foam heat-insulation board is lower than 0.055 w/m.k, the specific gravity can reach below 150Kg/M3, the heat value of the compression strength is more than 150KPa and is less than 3MJ/Kg, but the flame-retardant EPS foam heat-insulation board has poor tensile, shearing and bending resistance and poor elastic deformation capability.
Disclosure of Invention
The present invention aims to provide a method for preparing an EPS foamed article to solve the problems set forth in the above-mentioned background art.
In order to achieve the purpose, the invention provides the following technical scheme:
a preparation method of an EPS foam product comprises the following components: 60-70 parts of polystyrene particles, 20-25 parts of benzene, 60-70 parts of absolute ethyl alcohol, 20-22 parts of ethylene glycol ethyl ether, 8-10 parts of soluble pentane and 5-6 parts of brominated polystyrene, wherein the preparation method comprises the following steps:
s1, foaming: uniformly mixing 60-70 parts of polystyrene particles, 20-25 parts of benzene, 60-70 parts of absolute ethyl alcohol, 20-22 parts of ethylene glycol ethyl ether, 8-10 parts of soluble pentane and 5-6 parts of brominated polystyrene, and feeding the mixture into a foaming machine for heating and foaming to expand the mixture until the density reaches the set density, thereby obtaining a mixture;
s2, curing: penetrating the mixture obtained in the step S1 through air, and keeping the internal pressure and the external pressure of the mixture balanced;
s3, molding: filling the cured mixture obtained in the step S2 into a mold, and then carrying out steam heating on the mold to expand and mold the mixture into EPS foam;
s4, cutting: and sequentially carrying out vacuum cooling, demolding, drying and cutting on the formed EPS foam to obtain the EPS foam product.
As a still further scheme of the invention: the polystyrene particles consist of the following components: 1.5-2 parts of sodium dodecyl benzene sulfonate, 3-4 parts of polyvinyl alcohol, 3-4 parts of calcium phosphate, 180-200 parts of styrene, 5-6 parts of an auxiliary agent and 3-4 parts of calcium carbonate.
As a still further scheme of the invention: the preparation method of the polystyrene particles comprises the following steps:
s11, injecting 200-220 parts of pure water into the reaction kettle, then adding 1.5-2 parts of sodium dodecyl benzene sulfonate, stirring to completely dissolve the sodium dodecyl benzene sulfonate, continuously adding 3-4 parts of polyvinyl alcohol and 3-4 parts of calcium phosphate, and measuring the pH value of the mixture to control the pH value to be 7.5-8.5;
s12, adding 180-200 parts of styrene into the reaction kettle, continuously stirring, and adding 5-6 parts of an auxiliary agent in the stirring process to fully mix;
s13, carrying out steam heating on the reaction kettle, controlling the temperature to be 85-90 ℃, carrying out heating reaction for 40-60 min, adding 3-4 parts of calcium carbonate, and carrying out polymerization reaction;
and S14, after the polymerization reaction is finished, filling pentane gas into the reaction kettle, controlling the pressure of the pentane gas to be 0.55-0.6 MPa, heating the reaction kettle to (108 +/-2) DEG C, keeping the temperature and the pressure constant for 2 hours, heating to (112 +/-2) DEG C, keeping the temperature and the pressure constant for 3 hours, discharging, cleaning, cooling and drying to obtain the EPS beads.
As a still further scheme of the invention: the auxiliary agent consists of the following components: 5-8 parts of tert-butyl peroxybenzoate, 40-45 parts of benzoyl peroxide, 5-6 parts of methyl ethyl ketone peroxide, 15-20 parts of dodecyl mercaptan and 10-12 parts of dioctyl adipate.
As a still further scheme of the invention: and in the step S1, saturated steam is adopted for heating, the temperature is controlled to be 115-120 ℃, and the saturated steam pressure is controlled to be 0.5-0.8 bar.
As a still further scheme of the invention: and the cooling speed of vacuum cooling in the step S4 is controlled to be 3-5 ℃/min.
Compared with the prior art, the invention has the beneficial effects that:
the invention is composed of polystyrene particles, benzene, absolute ethyl alcohol, ethylene glycol ethyl ether, soluble pentane and brominated polystyrene, wherein the polystyrene particles are composed of sodium dodecyl benzene sulfonate, polyvinyl alcohol, calcium phosphate, styrene, an auxiliary agent and calcium carbonate, so that the polystyrene particles have excellent tensile, shearing, bending and compression resistance properties, are not easily damaged by external force in the using process, have longer service life, have large linear elasticity change range and good elasticity, can bear larger pressure, and have strong elastic deformation capability and are not easily damaged.
Detailed Description
In the embodiment of the invention, the preparation method of the EPS foam product comprises the following components: 60-70 parts of polystyrene particles, 20-25 parts of benzene, 60-70 parts of absolute ethyl alcohol, 20-22 parts of ethylene glycol ethyl ether, 8-10 parts of soluble pentane and 5-6 parts of brominated polystyrene, wherein the preparation method comprises the following steps:
s1, foaming: uniformly mixing 60-70 parts of polystyrene particles, 20-25 parts of benzene, 60-70 parts of absolute ethyl alcohol, 20-22 parts of ethylene glycol ethyl ether, 8-10 parts of soluble pentane and 5-6 parts of brominated polystyrene, and feeding the mixture into a foaming machine for heating and foaming to expand the mixture until the density reaches the set density, thereby obtaining a mixture;
s2, curing: penetrating the mixture obtained in the step S1 through air, and keeping the internal pressure and the external pressure of the mixture balanced;
s3, molding: filling the cured mixture obtained in the step S2 into a mold, and then carrying out steam heating on the mold to expand and mold the mixture into EPS foam;
s4, cutting: and sequentially carrying out vacuum cooling, demolding, drying and cutting on the formed EPS foam to obtain the EPS foam product.
Preferably, the polystyrene particles consist of: 1.5-2 parts of sodium dodecyl benzene sulfonate, 3-4 parts of polyvinyl alcohol, 3-4 parts of calcium phosphate, 180-200 parts of styrene, 5-6 parts of an auxiliary agent and 3-4 parts of calcium carbonate.
Preferably, the preparation method of the polystyrene particles comprises the following steps:
s11, injecting 200-220 parts of pure water into the reaction kettle, then adding 1.5-2 parts of sodium dodecyl benzene sulfonate, stirring to completely dissolve the sodium dodecyl benzene sulfonate, continuously adding 3-4 parts of polyvinyl alcohol and 3-4 parts of calcium phosphate, and measuring the pH value of the mixture to control the pH value to be 7.5-8.5;
s12, adding 180-200 parts of styrene into the reaction kettle, continuously stirring, and adding 5-6 parts of an auxiliary agent in the stirring process to fully mix;
s13, carrying out steam heating on the reaction kettle, controlling the temperature to be 85-90 ℃, carrying out heating reaction for 40-60 min, adding 3-4 parts of calcium carbonate, and carrying out polymerization reaction;
and S14, after the polymerization reaction is finished, filling pentane gas into the reaction kettle, controlling the pressure of the pentane gas to be 0.55-0.6 MPa, heating the reaction kettle to (108 +/-2) DEG C, keeping the temperature and the pressure constant for 2 hours, heating to (112 +/-2) DEG C, keeping the temperature and the pressure constant for 3 hours, discharging, cleaning, cooling and drying to obtain the EPS beads.
Preferably, the auxiliary agent consists of the following components: 5-8 parts of tert-butyl peroxybenzoate, 40-45 parts of benzoyl peroxide, 5-6 parts of methyl ethyl ketone peroxide, 15-20 parts of dodecyl mercaptan and 10-12 parts of dioctyl adipate.
Preferentially, the heating mode in the step S1 adopts saturated steam for heating, the temperature is controlled to be 115-120 ℃, and the saturated steam pressure is controlled to be 0.5-0.8 bar.
Preferably, the cooling rate of the vacuum cooling in the step S4 is controlled to be 3-5 ℃/min.
To better illustrate the technical effect of the present invention, it is illustrated by the following tests:
taking the EPS foam product prepared by the process of the invention as an example, three EPS foam products with the same density are randomly selected in the market as a first comparative example, a second comparative example and a third comparative example;
the EPS foam articles of examples, comparative examples one, comparative examples two and comparative examples three were subjected to tensile, shear, bending, compression tests, respectively:
the EPS foam products of the examples, the comparative examples I, the comparative examples II and the comparative examples are selected, cut into 150X 150mm test pieces, and subjected to tensile, shearing, bending and compression tests respectively, and when the test pieces are damaged under the limit force, the tensile strength (unit: kPa), the shear strength (unit: kPa), the bending strength (unit: kPa) and the compressive strength (unit: kPa) are recorded respectively, and the results are shown in the following table 1;
table 1, examples, comparative example one, comparative example two and comparative example three test results
From the analysis in table 1 it can be derived: the tensile strength, shear strength, bending strength and compression strength of the EPS foam products in the examples were significantly higher than those of comparative example one, comparative example two and comparative example three, so that it can be found that: the EPS foam product in the embodiment has excellent tensile, shear, bending and compression resistance, is not easy to be damaged by external force in the using process, and has longer service life.
Firstly, respectively carrying out a compressive stress experiment on EPS foam products of examples, comparative examples I, comparative examples II and comparative examples III, recording the deformation rate of the EPS foam products of the examples, the comparative examples I, the comparative examples II and the comparative examples III under different compressive stresses, namely compressive strain (%), in the experimental process, and drawing a graph, wherein the graph is shown in the attached figure 1 of the specification;
the analysis of the attached figure 1 in the specification can show that: in the examples, the compressive stress is in the range of 0 to 100kPa, the initial stage of deformation is represented by linear elastic change, the elastic property is good, after the yield point is reached to 100kPa, the plastic deformation is generated by the yield hardening, and the yield points of the EPS foam products in the first comparative example, the second comparative example and the third comparative example are all less than 100kPa, so that the following results can be obtained: the linear elasticity variation range of the EPS foam articles in the examples is larger than those of comparative examples one, two and three, and further, it can be found that: the elastic behavior of the EPS foam products in the examples is due to the elastic behavior of the EPS foam products in the comparative examples I, II and III;
after the yield point was exceeded, the compressive strain of the EPS foam articles in examples, comparative example one, comparative example two and comparative example three all increased rapidly, and it can be concluded that: the EPS foam articles of examples, comparative example one, comparative example two and comparative example three maintained elastic properties under compression even beyond the linear elastic range; after the compressive stress reaches a certain value, the compressive strain of the EPS foam products in the examples, the comparative examples I, the comparative examples II and the comparative examples III is changed very little or not, namely, the EPS foam products are damaged and lose the deformation capability, but the attached figure 1 in the specification shows that: the EPS foam products in the comparative examples I, II and III are all damaged, after the deformation capability is lost, the EPS foam products in the examples are still not damaged, and the deformation capability is better than that of the EPS foam products in the comparative examples I, II and III, so that the following results can be obtained: in the embodiment, the EPS foam product can bear larger pressure, has strong elastic deformation capacity and is not easy to damage.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention are equivalent to or changed within the technical scope of the present invention.
Claims (6)
1. A preparation method of an EPS foam product comprises the following components: 60-70 parts of polystyrene particles, 20-25 parts of benzene, 60-70 parts of absolute ethyl alcohol, 20-22 parts of ethylene glycol ethyl ether, 8-10 parts of soluble pentane and 5-6 parts of brominated polystyrene, and is characterized in that the preparation method comprises the following steps:
s1, foaming: uniformly mixing 60-70 parts of polystyrene particles, 20-25 parts of benzene, 60-70 parts of absolute ethyl alcohol, 20-22 parts of ethylene glycol ethyl ether, 8-10 parts of soluble pentane and 5-6 parts of brominated polystyrene, and feeding the mixture into a foaming machine for heating and foaming to expand the mixture until the density reaches the set density, thereby obtaining a mixture;
s2, curing: penetrating the mixture obtained in the step S1 through air, and keeping the internal pressure and the external pressure of the mixture balanced;
s3, molding: filling the cured mixture obtained in the step S2 into a mold, and then carrying out steam heating on the mold to expand and mold the mixture into EPS foam;
s4, cutting: and sequentially carrying out vacuum cooling, demolding, drying and cutting on the formed EPS foam to obtain the EPS foam product.
2. A method of making an EPS foam article according to claim 1 wherein the polystyrene particles are comprised of: 1.5-2 parts of sodium dodecyl benzene sulfonate, 3-4 parts of polyvinyl alcohol, 3-4 parts of calcium phosphate, 180-200 parts of styrene, 5-6 parts of an auxiliary agent and 3-4 parts of calcium carbonate.
3. A method of making an EPS foam article according to claim 2, wherein the method of making the polystyrene particles comprises the steps of:
s11, injecting 200-220 parts of pure water into the reaction kettle, then adding 1.5-2 parts of sodium dodecyl benzene sulfonate, stirring to completely dissolve the sodium dodecyl benzene sulfonate, continuously adding 3-4 parts of polyvinyl alcohol and 3-4 parts of calcium phosphate, and measuring the pH value of the mixture to control the pH value to be 7.5-8.5;
s12, adding 180-200 parts of styrene into the reaction kettle, continuously stirring, and adding 5-6 parts of an auxiliary agent in the stirring process to fully mix;
s13, carrying out steam heating on the reaction kettle, controlling the temperature to be 85-90 ℃, carrying out heating reaction for 40-60 min, adding 3-4 parts of calcium carbonate, and carrying out polymerization reaction;
and S14, after the polymerization reaction is finished, filling pentane gas into the reaction kettle, controlling the pressure of the pentane gas to be 0.55-0.6 MPa, heating the reaction kettle to (108 +/-2) DEG C, keeping the temperature and the pressure constant for 2 hours, heating to (112 +/-2) DEG C, keeping the temperature and the pressure constant for 3 hours, discharging, cleaning, cooling and drying to obtain the EPS beads.
4. A method of making an EPS foam article according to claim 2 wherein the adjuvant is comprised of: 5-8 parts of tert-butyl peroxybenzoate, 40-45 parts of benzoyl peroxide, 5-6 parts of methyl ethyl ketone peroxide, 15-20 parts of dodecyl mercaptan and 10-12 parts of dioctyl adipate.
5. The method of claim 1, wherein the heating in step S1 is performed by saturated steam at 115-120 deg.C under 0.5-0.8 bar.
6. The method for preparing an EPS foam product of claim 1, wherein the cooling rate of vacuum cooling in the step S4 is controlled to be 3-5 ℃/min.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116100840A (en) * | 2022-09-08 | 2023-05-12 | 青岛荣发保温材料有限公司 | Integrated molding preparation method of environment-friendly EPS insulation can |
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| CN102459435A (en) * | 2009-06-02 | 2012-05-16 | 西博拉技术有限公司 | Particulate, expandable polystyrene as well as a method for preparing the same |
| CN102838815A (en) * | 2012-09-13 | 2012-12-26 | 哈尔滨工业大学 | Preparation method for flame-retardant foamed polystyrene resin |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102459435A (en) * | 2009-06-02 | 2012-05-16 | 西博拉技术有限公司 | Particulate, expandable polystyrene as well as a method for preparing the same |
| CN102838815A (en) * | 2012-09-13 | 2012-12-26 | 哈尔滨工业大学 | Preparation method for flame-retardant foamed polystyrene resin |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116100840A (en) * | 2022-09-08 | 2023-05-12 | 青岛荣发保温材料有限公司 | Integrated molding preparation method of environment-friendly EPS insulation can |
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