CN109824935B - Production process of polystyrene foam insulation board - Google Patents
Production process of polystyrene foam insulation board Download PDFInfo
- Publication number
- CN109824935B CN109824935B CN201811599266.7A CN201811599266A CN109824935B CN 109824935 B CN109824935 B CN 109824935B CN 201811599266 A CN201811599266 A CN 201811599266A CN 109824935 B CN109824935 B CN 109824935B
- Authority
- CN
- China
- Prior art keywords
- foaming
- ammonium carbonate
- polystyrene foam
- carbon dioxide
- insulation board
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The application relates to a production process of a polystyrene foam insulation board, which comprises the steps of preparing a foaming material raw material and then carrying out foaming operation, wherein the foaming material raw material contains an ammonium carbonate aqueous solution; the foaming operation adopts a supercritical carbon dioxide treatment process. The method introduces ammonium carbonate and water into the system, wherein the purpose of introducing the ammonium carbonate is to provide weak alkaline activity without increasing impurities in the whole system, and the purpose of introducing the water is to provide a medium for combining carbon dioxide and the ammonium carbonate and provide a microenvironment for gathering the carbon dioxide; the ammonium carbonate in the ammonium carbonate aqueous solution exists in an ionic property, and can be distributed more uniformly in the process of mixing the ammonium carbonate and the foaming material, so that the ammonium carbonate can be better uniformly distributed in the whole system before the carbon dioxide is introduced to serve as a foaming target point.
Description
Technical Field
The application relates to a production process of a polystyrene foam insulation board.
Background
The polystyrene foam board is made of expandable polystyrene beads containing volatile foaming agent, has the structural characteristic of fine closed pores, and is mainly used for building walls, roof insulation, composite board insulation, insulation of cold storage, air conditioners, vehicles and ships, floor heating, decoration carving and the like, and has wide application.
The polystyrene foam board mainly has the following advantages:
1. excellent heat insulating property
The foamed polyurethane heat insulation material has the characteristics of high thermal resistance, low linearity and low expansion ratio, the closed pore rate of the structure reaches more than 99%, a vacuum layer is formed, air flow heat dissipation is avoided, the heat insulation performance is ensured to be lasting and stable, and the foamed polyurethane heat insulation material has the advantages of being superior to the foamed polyurethane 80% closed pore rate. The practice proves that the heat preservation effect of the polystyrene foam board with the thickness of 20mm is equivalent to that of foamed polystyrene with the thickness of 50mm and cement perlite with the thickness of 120 mm. Therefore, the material is the best choice for building heat preservation at present.
2. Excellent high-strength compression resistance
Due to the special structure of the polystyrene foam board, the polystyrene foam board has extremely high compressive strength and extremely high impact resistance, and the compressive strength of the polystyrene foam board reaches more than 150-500 Kpa according to different models and thicknesses of the polystyrene foam board, so that the polystyrene foam board can bear the ground load of various systems, and is widely applied to the fields of geothermal engineering, highways, airport runways, square grounds, large-scale cold storages, interior decoration and heat preservation of vehicles and the like.
3. High hydrophobic and moisture-proof performance
The water absorption rate is an important parameter for measuring the thermal insulation material. The heat insulation material absorbs water, then the heat insulation performance is reduced, and the absorbed water is easy to freeze at low temperature, so that the structure of the heat insulation material is damaged, and the compression resistance and the heat insulation performance of the plate are reduced. Because the polystyrene molecular structure does not absorb water, the plate molecular structure is stable and gapless, and the problems of water leakage, permeation, frosting, condensation and the like of other materials are solved.
4. Light weight and convenient use
The completely closed-cell foaming chemical structure and the cellular physical structure of the polystyrene foam board enable the polystyrene foam board to have the characteristics of light weight and high strength, are convenient to cut and transport, and are not easy to damage and convenient to install.
5. Good stability and corrosion resistance
The polystyrene foam board is not aged, decomposed or harmful substances are not generated in long-term use, the chemical property of the polystyrene foam board is extremely stable, the polystyrene foam board is not degraded due to water absorption, corrosion and the like, the performance of the polystyrene foam board is reduced, the polystyrene foam board can still maintain the excellent performance in a high-temperature environment, the polystyrene foam board can still maintain the excellent performance even if the polystyrene foam board is used for 30-40 years according to the introduction of related data, the polystyrene foam board is not decomposed or mildewed, and toxic substances are not volatilized.
6. Environmental protection performance of products
The polystyrene foam board has stable chemical performance, does not volatilize harmful substances and is harmless to human bodies through detection of related national departments, and the production raw materials adopt environment-friendly materials and do not generate any industrial pollution. The product belongs to an environment-friendly building material.
The most significant impact on the performance of polystyrene foam boards is the foaming stage, while the most significant impact on foaming is on the raw materials and operating process. In the foaming operation of polystyrene, the selection of a foaming agent is changed for many times, the first method adopts a halogen-containing organic foaming agent, but the foaming agent is greatly polluted and is basically abandoned at present; the second is to operate in supercritical fluid, such as carbon dioxide, but the operation also has some disadvantages, such as uneven distribution, formation of through holes, etc., so some organic solvents, such as ethanol, are apt to be introduced into the system at present, but the effect of improving the swelling degree of the system is not particularly obvious after the ethanol is introduced, and the introduced ethanol is flammable and explosive substance and has certain safety hazard.
CN108976628A an EPS compression-resistant plate produced by supercritical carbon dioxide process, which discloses the following technology: the EPS pressure-resistant plate is prepared from the following raw materials in parts by weight: 40-50 parts of polystyrene resin, 10-12 parts of brominated epoxy resin, 4-6 parts of polycarbonate, 1-2 parts of sodium stearate, 2-3 parts of zinc oxide, 1-3 parts of phenyl silicone oil, 2-3 parts of nucleating agent and 0.8-1.4 parts of antioxidant. The manufacturing method mainly comprises the steps of continuous heating foaming, high-pressure steam shaping, high-temperature spraying and the like. The invention overcomes the defects of the prior art, improves the pore density of the traditional EPS board, increases the compression resistance and resilience of the traditional EPS board, strengthens the toughness of the material, effectively improves the decompression and shock resistance effects of the board, and simultaneously leads the board to have the advantages of wear resistance, ageing resistance, flame retardance and the like. The application still does not solve the problem of insufficient expansion capacity.
CN104476711A a method for producing a uniform polypropylene foamed thick plate discloses the following techniques: the foaming pressure, temperature and time need to meet the following requirements: t-0.227 x (T-150)2+0.004083*(P-17.5)4+40, wherein t is the foaming time/min; t is the foaming temperature/° C; p is foaming pressure/MPa, namely the pressure of high-temperature and high-pressure gas, wherein t is 30-250min, preferably 40-230 min. The foaming time, temperature and pressure conditions are adopted, the diffusion of carbon dioxide is easy through a fixed synergistic relationship, the damage of carbon dioxide airflow to polypropylene is avoided, the technical obstacle that the prior art can not realize direct foaming of thick plates is overcome, the aim of obtaining the polypropylene microporous foaming material with large foaming multiplying power, small aperture size, high cell density, large thickness and uniform structure is realized, and the foaming material with the foaming thickness of more than 10mm can be realized. This application has reached certain effect that improves the foaming multiplying power through control temperature pressure, but its control process is comparatively loaded down with trivial details in this in-process, and the effect is not special obvious, only improves relatively, does it cause, mainly because it does not solve this problem from the foaming mechanism.
Content of application
In order to solve the problems, the application provides a production process of a polystyrene foam insulation board, which comprises the steps of preparing a foaming material raw material and then carrying out foaming operation, wherein the foaming material raw material contains an ammonium carbonate aqueous solution; the foaming operation adopts a supercritical carbon dioxide treatment process. The purpose of using an aqueous ammonium carbonate solution is as follows: 1. introducing ammonium carbonate and water into the system, wherein the ammonium carbonate is introduced to provide weak alkaline activity without increasing impurities in the whole system, and the water is introduced to provide a medium for combining carbon dioxide and ammonium carbonate and provide a microenvironment for gathering the carbon dioxide; 2. the ammonium carbonate in the ammonium carbonate aqueous solution exists in an ionic property, and can be distributed more uniformly in the process of mixing the ammonium carbonate and the foaming material, so that the ammonium carbonate can be better and uniformly distributed in the whole system before the carbon dioxide is introduced to serve as a foaming target point; 3. the supercritical gas adopts carbon dioxide mainly for two purposes, namely foaming pore-forming and combining with ammonium carbonate serving as a target point before foaming pore-forming, and the distribution uniformity of the carbon dioxide is improved by virtue of the distribution uniformity of the ammonium carbonate.
Preferably, the concentration of the ammonium carbonate aqueous solution is 10-50 g/L.
Preferably, the concentration of the ammonium carbonate aqueous solution is 17-25 g/L. When the concentration of ammonium carbonate is high, the uniformity of distribution of ammonium carbonate deteriorates rapidly. Tests show that when the concentration of the aqueous solution is 17-25g/L, the distribution of the ammonium carbonate aqueous solution in the foaming material raw material is optimal, and the foaming multiplying power is remarkably improved.
Preferably, the raw materials of the foaming material comprise the following raw materials in parts by mass: polystyrene: 90-100 parts of ammonium carbonate aqueous solution: 0.1-1 part.
Preferably, the raw materials of the foaming material comprise the following raw materials in parts by mass: polystyrene: 95-98 parts of ammonium carbonate aqueous solution: 0.4 to 0.7 portion. It has been found through experiments that the content of the ammonium carbonate aqueous solution is not suitable to be excessive, and when the content is excessive, agglomeration phenomenon occurs, and the high polarity of the water is related. In the presence of a polystyrene: 95-98 parts of ammonium carbonate aqueous solution: when the amount is 0.4 to 0.7 part, the expansion ratio is optimized.
Preferably, the foaming material raw materials are mixed by a high shear emulsifying machine and then subjected to foaming operation. Improving the uniformity of mixing.
Preferably, the rotating speed of the high-shear emulsifying machine on the foaming material raw material is not lower than 3000r/min, and the action time is not lower than 5 h. The high shear emulsifier is mainly used for the mixing process designed to make the liquid as continuous phase, and in this application, mainly by means of the shearing action, high rotation speed and temperature controllable characteristics of the high shear emulsifier, the distribution of the ammonium carbonate aqueous solution in polystyrene is improved.
Preferably, the supercritical carbon dioxide treatment process comprises the following two process steps: stirring and foaming; in the stirring step, after the foaming material raw material is charged with carbon dioxide, the foaming material raw material treated by the high-shear emulsifying machine is stirred, and the stirring time is not less than 0.5 h. The stirring process is mainly used for uniformly blending carbon dioxide into the whole system under the action of the target point of the ammonium carbonate aqueous solution.
Preferably, the temperature of the foaming operation is higher than 130 ℃.
Preferably, the temperature of the foaming operation is 140-150 ℃. The decomposition effect of ammonium carbonate and the separation effect of water are improved, and the foaming multiplying power is ensured.
This application can bring following beneficial effect:
1. introducing ammonium carbonate and water into the system, wherein the ammonium carbonate is introduced to provide weak alkaline activity without increasing impurities in the whole system, and the water is introduced to provide a medium for combining carbon dioxide and ammonium carbonate and provide a microenvironment for gathering the carbon dioxide;
2. the ammonium carbonate in the ammonium carbonate aqueous solution exists in an ionic property, and can be distributed more uniformly in the process of mixing the ammonium carbonate and the foaming material, so that the ammonium carbonate can be better and uniformly distributed in the whole system before the carbon dioxide is introduced to serve as a foaming target point;
3. the supercritical gas adopts carbon dioxide mainly for two purposes, namely foaming pore-forming and combining with ammonium carbonate serving as a target point before foaming pore-forming, and the distribution uniformity of the carbon dioxide is improved by virtue of the distribution uniformity of the ammonium carbonate;
4. the foaming ratio is improved in an auxiliary mode by optimizing the whole formula, the operation steps and the operation parameters.
Detailed Description
The present application will be described in detail with reference to examples, but the present application is not limited to these examples.
The specific embodiment is as follows:
the whole technical scheme is carried out as follows:
s1, preparing a polystyrene raw material: polystyrene is crushed to be below 100 meshes for standby, and ammonium carbonate solution is prepared: the concentration of the ammonium carbonate solution is 10-50 g/L;
s2, mixing the obtained polystyrene raw material with an ammonium carbonate solution and other additives, and adding the mixture into a high-shear emulsifying machine for mixing;
s3, adding the mixture into a reaction kettle after mixing, charging carbon dioxide to a supercritical state, keeping the temperature at about 50 ℃, stirring at a stirring speed of not less than 100r/min, and then quickly releasing pressure.
According to the above procedure, other main raw materials and operating parameters are shown in the following table:
the above products were characterized and the parameters obtained were as follows:
| serial number | Apparent density (kg/m)3) | Thermal conductivity (W/(mK)) | Breaking strength (Mpa) |
| Example 1 | 109 | 0.051 | 1.360 |
| Example 2 | 101 | 0.046 | 1.275 |
| Example 3 | 97 | 0.048 | 1.235 |
| Example 4 | 91 | 0.041 | 1.188 |
| Example 5 | 108 | 0.053 | 1.207 |
| Comparative example 1 | 139 | 0.061 | 1.472 |
| Comparative example 2 | 141 | 0.066 | 1.491 |
| Comparative example 3 | 117 | 0.059 | 1.245 |
| Comparative example 4 | 121 | 0.057 | 1.278 |
| Comparative example 5 | 129 | 0.063 | 1.173 |
| Comparative example 6 | 120 | 0.057 | 1.137 |
| Comparative example 7 | 124 | 0.055 | 1.306 |
| Comparative example 8 | 125 | 0.058 | 1.320 |
Since the apparent density and the expansion ratio are in negative correlation, it can be seen from the above examples that the technology adopted in the present application can greatly reduce the apparent density and thus the thermal conductivity on the basis of basically ensuring the flexural strength. In the application, the ammonium carbonate solution in an ionic state is firstly introduced into the whole system through a high-shear emulsifying machine, the ammonium carbonate solution can be dispersed and uniform in polystyrene due to low solubility and high dispersibility of the ammonium carbonate solution, and the ammonium carbonate has certain ionic attraction to the carbon dioxide, so that after the carbon dioxide is added into the whole system, the carbon dioxide is firstly selectively distributed near the ammonium carbonate according to the target point of the ammonium carbonate, and the integral uniformity is greatly improved. Then, the conventional supercritical carbon dioxide foaming operation is carried out to obtain a very good foaming effect; in addition, it has been found that 130 ℃ is of decisive importance in the ammonium carbonate system, that above 130 ℃, for example 140 ℃, the surface density of the resulting foamed material is reduced by about 30%, and that above 130 ℃ the very uniformly distributed ammonium carbonate can be substantially completely decomposed, so that the overall foaming operation is also promoted, and the surface density is thereby deteriorated.
It can be seen from a comparison of example 5 and example 4 that the experiment using only polystyrene and an aqueous solution of ammonium carbonate has more optimum properties than the experiment using other raw materials, such as polycarbonate.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (7)
1. A production process of a polystyrene foam insulation board comprises the steps of preparing foaming material raw materials and then carrying out foaming operation, and is characterized in that: the raw material of the foaming material contains ammonium carbonate aqueous solution; the foaming operation adopts a supercritical carbon dioxide treatment process;
the concentration of the ammonium carbonate aqueous solution is 10-50 g/L;
the operation temperature of the foaming operation is 140-150 ℃.
2. The production process of the polystyrene foam insulation board according to claim 1, characterized in that: the concentration of the ammonium carbonate aqueous solution is 17-25 g/L.
3. The production process of the polystyrene foam insulation board according to claim 1, characterized in that: the foaming material comprises the following raw materials in parts by mass: polystyrene: 90-100 parts of ammonium carbonate aqueous solution: 0.1-1 part.
4. The production process of the polystyrene foam insulation board according to claim 1, characterized in that: the foaming material comprises the following raw materials in parts by mass: polystyrene: 95-98 parts of ammonium carbonate aqueous solution: 0.4 to 0.7 portion.
5. The production process of the polystyrene foam insulation board according to claim 1, characterized in that: the foaming material raw materials are mixed by a high-shear emulsifying machine and then subjected to foaming operation.
6. The production process of the polystyrene foam insulation board according to claim 5, characterized in that: the rotating speed of the high-shear emulsifying machine on the foaming material raw material is not lower than 3000r/min, and the acting time is not lower than 5 h.
7. The production process of the polystyrene foam insulation board according to claim 6, characterized in that: the supercritical carbon dioxide treatment process comprises the following two process steps: stirring and foaming; in the stirring step, after the foaming material raw material is charged with carbon dioxide, the foaming material raw material treated by the high-shear emulsifying machine is stirred, and the stirring time is not less than 0.5 h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811599266.7A CN109824935B (en) | 2018-12-26 | 2018-12-26 | Production process of polystyrene foam insulation board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811599266.7A CN109824935B (en) | 2018-12-26 | 2018-12-26 | Production process of polystyrene foam insulation board |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109824935A CN109824935A (en) | 2019-05-31 |
| CN109824935B true CN109824935B (en) | 2021-06-08 |
Family
ID=66861254
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811599266.7A Active CN109824935B (en) | 2018-12-26 | 2018-12-26 | Production process of polystyrene foam insulation board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109824935B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5110837A (en) * | 1990-11-26 | 1992-05-05 | Basf Corporation | Process for making molded polymeric product with multipass expansion of polymer bead with low blowing agent content |
| CN101565510A (en) * | 2009-06-04 | 2009-10-28 | 上海交通大学 | Preparation method of modified macromolecule foaming material |
| CN107446154A (en) * | 2017-08-28 | 2017-12-08 | 合肥华凌股份有限公司 | A kind of high-performance fretting map master batch and its preparation method and application |
-
2018
- 2018-12-26 CN CN201811599266.7A patent/CN109824935B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5110837A (en) * | 1990-11-26 | 1992-05-05 | Basf Corporation | Process for making molded polymeric product with multipass expansion of polymer bead with low blowing agent content |
| CN101565510A (en) * | 2009-06-04 | 2009-10-28 | 上海交通大学 | Preparation method of modified macromolecule foaming material |
| CN107446154A (en) * | 2017-08-28 | 2017-12-08 | 合肥华凌股份有限公司 | A kind of high-performance fretting map master batch and its preparation method and application |
Non-Patent Citations (1)
| Title |
|---|
| 超临界CO2发泡阻燃聚苯乙烯研究;王亚桥;《中国塑料》;20171231;第31卷(第12期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109824935A (en) | 2019-05-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102911341B (en) | Formula and process of fire retardance modified polyurethane insulation board | |
| CN104327449A (en) | Phenolic foam heat-preservation material and preparation method thereof | |
| EP2445954A1 (en) | Porous carbon-containing compounds as water carriers and cell size controlling agents for polymeric foams | |
| CN102229697A (en) | Solar polyurethane thermal insulation material | |
| CN103319676B (en) | A kind of open-celled polyurethane foam and preparation method thereof | |
| CN107089838A (en) | A kind of sulphate aluminium cement foam concrete using carbon dioxide as foamed gas and preparation method thereof | |
| CN105016681A (en) | Heat-isolating and insulating building composite material | |
| CN104262670A (en) | Foaming agent composition, polyurethane foam and manufacturing method thereof | |
| CN112679788A (en) | Nano composite foaming agent for preparing polyurethane and preparation method thereof | |
| CN109824935B (en) | Production process of polystyrene foam insulation board | |
| CN104774316A (en) | Polyurethane all-water foaming material for coal mine filling and preparation method thereof | |
| CN114891176B (en) | Double-temperature-domain phase-change polyurethane hard foam composite material and preparation method thereof | |
| CN109422907B (en) | Blowing agents comprising polyamines and alkanolamine salts and use in polyurethane continuous panel foam materials | |
| CN106279605A (en) | A kind of polyurethane foam heat insulation material | |
| CN104448186A (en) | Bio-based polyurethane foam insulation material | |
| CN103739808A (en) | Polyurethane thermal-insulation material and preparation method thereof | |
| CN105418877A (en) | Ternary phyllosilicate-polyurethane nano-composite thermal insulation material and preparing method thereof | |
| CN109422914B (en) | Polyamine ethanolamine alkaline foaming agent and application for preparing polyurethane solar foam material | |
| CN109851837A9 (en) | Processing technology of polystyrene foam insulation board doped with carbon material | |
| CN109422912B (en) | Alkaline polyamine alcohol amine blowing agents and use for producing polyurethane spray foam materials | |
| CN109422903B (en) | Blowing agents comprising secondary amine salts and propanolamine salts and use for polyurethane refrigerator-freezer foam materials | |
| CN109422894B (en) | Blowing agent comprising tertiary amine salt and propanol amine salt and use for polyurethane refrigerator-freezer foam material | |
| CN109422913B (en) | Foaming agent comprising polyamine salt and propanol amine salt and use for polyurethane refrigerator and freezer foam material | |
| CN109422896B (en) | Blowing agents comprising primary amine salts and propanolamine salts and use for polyurethane refrigerator-freezer foam materials | |
| CN109422900B (en) | Secondary amine and ethanolamine alkaline blowing agents and use for producing polyurethane solar foam materials |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220117 Address after: 065300 No. 188 Guangming Street, liangjiatai village, qigezhuang Town, Dachang Hui Autonomous County, Langfang City, Hebei Province Patentee after: Langfang juhesheng building materials Co.,Ltd. Address before: 065000 102, unit 1, building 7, dijingyuan, alcadia community, Guangyang District, Langfang City, Hebei Province Patentee before: Song Miao |