CN109501192A - Using CO2The preparation method and preparation facilities of the extruded polystyrene foam board of foaming - Google Patents
Using CO2The preparation method and preparation facilities of the extruded polystyrene foam board of foaming Download PDFInfo
- Publication number
- CN109501192A CN109501192A CN201811639938.2A CN201811639938A CN109501192A CN 109501192 A CN109501192 A CN 109501192A CN 201811639938 A CN201811639938 A CN 201811639938A CN 109501192 A CN109501192 A CN 109501192A
- Authority
- CN
- China
- Prior art keywords
- foaming
- preparation
- foam board
- polystyrene foam
- extruded polystyrene
- 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.)
- Pending
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Classifications
-
- 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
- C08J9/12—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
- C08J9/122—Hydrogen, oxygen, CO2, nitrogen or noble gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2025/00—Use of polymers of vinyl-aromatic compounds or derivatives thereof as moulding material
- B29K2025/04—Polymers of styrene
- B29K2025/08—Copolymers of styrene, e.g. AS or SAN, i.e. acrylonitrile styrene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2007/00—Flat articles, e.g. films or sheets
- B29L2007/002—Panels; Plates; Sheets
-
- 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
- C08J2203/06—CO2, N2 or noble gases
-
- 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
- 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
-
- 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
- C08J2425/00—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
- C08J2425/02—Homopolymers or copolymers of hydrocarbons
- C08J2425/04—Homopolymers or copolymers of styrene
- C08J2425/08—Copolymers of styrene
- C08J2425/12—Copolymers of styrene with unsaturated nitriles
Abstract
The invention discloses a kind of preparation methods of extruded polystyrene foam board using CO2 foaming: will polystyrene raw material, nucleating agent and blowing promotor mix after be added to extrusion foaming unit, inject in after CO2 foaming agent and foam；The injection direction of the CO2 foaming agent along screw rod radial direction from inside to outside.The present invention changes traditional ecto-entad pressurization to realize the mode of CO2 foaming agent injection, it is changed to inject from inside to outside, CO2 foaming agent has been automatically performed during outside escape to be blended with PS melt, improve degree of mixing of the CO2 in PS melt, make CO2 be well positioned to meet as foaming agent technique requirement, to prepare slab, low-density plank provide technology premise.Invention additionally discloses a kind of preparation facilities based on the above method.
Description
The present invention relates to Screw extruder technology fields, and in particular to a kind of extruded polystyrene to be foamed using CO2
The preparation method and preparation facilities of cystosepiment.
Background technique
XPS foam industry starts to walk from the nineties latter stage in last century, is an emerging industry, is made using HCFC-22/142b
For foaming agent.In China, XPS foam is substantially used as building thermal insulation material to use, and is mainly used in house insulation, is laid with high speed
Railway, heat preservation of refrigeration storage, plateau railway roadbed, airfield runway thermal insulation layer and field movable communication machine room, ventilation shaft, and it is other
As insulation and decoration (finishing) material etc. after Material cladding.
XPS foam industry is put into the industrial and commercial refrigeration air-conditioner row of China's submission as one of China HCFCs consumption industry
The second stage of industry, room air conditioner industry, polyurethane foam industry, extruded polystyrene foam industry etc. four consumption industries
HCFCs is eliminated in governing plan, its main feature is that possess plurality of medium-sized and small enterprises, it is widely distributed.For its technical level, money
The limitation of golden situation and managerial ability, and to the requirement that substitute safety uses, so that implementing in XPS foam industry
HCFCs, which is eliminated, faces many difficulties.
The alternative substitute technology of XPS industry is in the foam industry report of UNEP (United Nations Environment Program) (UNEP) publication
By repeatedly assessing, newest progress has also been incorporated into the annual update data of UNEP.XPS foam industry HCFCs foaming technique
Main substitute technology be that CO2/ alcohol/third component blowing agent combination foaming technique is aided with that is, using CO2 as primary blowing agent
The preparation that alcohol and ODP value are 0, the lower third component foaming agent of GWP value is auxiliary blowing agent progress XPS foaming plate.CO2
Boiling point it is very low, be -78.5 DEG C, the vapour pressure under room temperature is up to 6448kPa, and the relative molecular weight of CO2 is low, diffusion velocity
It is very fast, in extrusion and foaming process, in order to contain its prefoam in extruder barrel and head, the operating pressure of system
It is higher than using operating pressure of the HCFCs as foaming agent.In addition, the poor compatibility of CO2 and PS, molten in PS compared with HCFCs
Solubility in body is lower, it is also desirable to molten in PS to improve it by lifting system operating pressure or adjustment composition of raw materials
Xie Du.
In summary, CO2 is used to carry out the preparation of XPS foaming plate for main foaming agent, there are the following problems:
(1) existing screw extruder blending effect is undesirable, CO2 can not be made preferably to be dispersed in PS melt, it is difficult to meet
Technique requirement of the CO2 as foaming agent；
(2) preparing plate of the thickness greater than 60mm has certain difficulty；
(3) density for the XPS plate material that product density height is produced using CO2 is higher than the product to foam using HCFCs, causes
The cost of product increases.
Summary of the invention
In order to overcome the drawbacks described above for carrying out the preparation of XPS foaming plate using CO2 as main foaming agent, improve in foaming process
The solubility that effect is blended, improves CO2 of CO2 and PS melt, the present invention provides a kind of extruded polystyrene second to be foamed using CO2
The preparation method and preparation facilities of alkene cystosepiment.
The technical solution adopted by the invention is as follows:
A kind of preparation method of the extruded polystyrene foam board using CO2 foaming: by polystyrene raw material, nucleating agent and foaming
Extrusion foaming unit is added to after auxiliary agent mixing, is injected in after CO2 foaming agent and is foamed；The CO2 foaming agent is along screw rod
It is radial to spread from inside to outside.
The beneficial effects of the present invention are: the present invention changes traditional ecto-entad pressurization to realize the injection of CO2 foaming agent
Mode is changed to inject from inside to outside, and CO2 foaming agent has been automatically performed during outside escape to be blended with PS melt, mentions
High degree of mixing of the CO2 in PS melt, makes CO2 be well positioned to meet the technique requirement as foaming agent, to prepare slab, low
Density board provides technology premise.
Preferred: the polystyrene raw material is polystyrene blend styrene-acrylonitrile copolymer.
Preferred: the nucleating agent refers to carbonate nucleating agent.
It is preferred: the blowing promotor include purity be greater than 99% ethyl alcohol, it is compound with HCFC-134a, HFC-152a, just
One of butane, iso-butane or HFO-1234ze or a variety of.
Preferred: in the blowing promotor, the mass percentage of ethyl alcohol is 1 ~ 3%, HCFC- of polystyrene raw material
134a, HFC-152a, normal butane, iso-butane and the total mass percentage of HFO-1234ze are the 1 ~ 2% of raw material.
Preferred: the CO2 foaming agent is the liquid CO 2 that purity is greater than 99%, and mass percentage is that polystyrene is former
The 3 ~ 5% of material.
Preferred: the CO2 foaming agent is injected in the melt zone of the extrusion foaming unit, 20 ~ 25MPa of injection pressure.
A kind of preparation facilities of the extruded polystyrene foam board using CO2 foaming, it is characterised in that: including extrusion foaming
Unit and liquid CO 2 injection device, the extrusion foaming unit includes the host set gradually, heat exchanger, head and pressing
The injection pipe of traction device, the liquid CO 2 injection device is arranged in the barrel of the head, and nozzle is close to screw channel
Bottom.
The screw rod of the head is equipped with one section of notch for lacking spiral shell rib, and the injection pipe is arranged in the notch.
The liquid CO 2 injection device includes the head tank being sequentially communicated, force (forcing) pump, surge tank, injection pump and injection pipe.
Detailed description of the invention
Fig. 1 is the schematic diagram of the embodiment of the present invention.
Fig. 2 is the schematic diagram of screw rod in the embodiment of the present invention.
Fig. 3 is the enlarged drawing in the embodiment of the present invention at A.
Extrusion foaming unit 1, host 101, heat exchanger 102, head 103, flattens traction dress at liquid CO 2 injection device 2
Set 104, notch 105, head tank 201, force (forcing) pump 202, surge tank 203, injection pump 204, injection pipe 205.
Specific embodiment
The invention will be further described with embodiment with reference to the accompanying drawing.
In embodiment, as shown in Fig. 1 ~ 3, a kind of preparation method of the extruded polystyrene foam board using CO2 foaming: will
Extrusion foaming unit is added to after polystyrene raw material, nucleating agent and blowing promotor mixing, is injected in after CO2 foaming agent and is sent out
Bubble；The CO2 foaming agent is spread from inside to outside along the radial direction of screw rod.The present embodiment changes traditional ecto-entad and pressurizes to realize
The mode of CO2 foaming agent injection, is changed to inject from inside to outside, CO2 foaming agent be automatically performed during outside escape with
The blending of PS melt improves degree of mixing of the CO2 in PS melt, is well positioned to meet CO2 and wants as the technique of foaming agent
Ask, to prepare slab, low-density plank provide technology premise.
In embodiment: the polystyrene raw material is polystyrene blend styrene-acrylonitrile copolymer.Specific polyphenyl
Ethylene raw is general purpose grade, 1 ~ 25g/10min of melt flow rate (MFR), most preferably 1 ~ 10g/10min of melt flow rate (MFR), in raw material
Styrene-acrylonitrile copolymer account for polystyrene blend styrene-acrylonitrile copolymer total amount mass percentage be 1 ~
20%, to further increase expansion ratio.
In embodiment: the nucleating agent refers to carbonate nucleating agent, the preferably mixing of sodium bicarbonate and citric acid composition
Mixture, sodium carbonate and the citric acid group of object, the mixture of calcium bicarbonate and citric acid composition, magnesium bicarbonate and citric acid composition
At mixture, calcium carbonate and citric acid composition mixture or the quality percentage of mixture that is formed with citric acid of magnesium carbonate contain
Amount is the 0.5 ~ 1% of raw material；Talcum powder, calcium silicates, graphite or carbon black mass percentage be the 0.5 ~ 2% of raw material.
In embodiment: the blowing promotor include purity be greater than 99% ethyl alcohol, it is compound with HCFC-134a, HFC-152a,
One of normal butane, iso-butane or HFO-1234ze or a variety of.In the blowing promotor, the mass percentage of ethyl alcohol is poly-
1 ~ 3%, HCFC-134a of styrene material, HFC-152a, normal butane, iso-butane and the total quality percentage of HFO-1234ze contain
Amount is the 1 ~ 2% of raw material.The molecular weight of ethyl alcohol is 46.0, and the molecular weight with CO2 is very close to (44.0), vapor phase thermal conductivity
(25 DEG C) are 14.4mW/m.K, and diffusion coefficient is substantially less than CO2.The boiling point of ethyl alcohol is 78 DEG C, is low volatility foaming agent.Ethyl alcohol
There is significant plasticization to PS melt, the viscosity of PS melt can be greatly reduced, especially with the increase of ethanol consumption, PS
The viscosity of melt persistently reduces, and CO2 weakens the plasticization effect of PS melt as dosage increases, and becomes less significant.Just
It is this significant plasticization due to ethyl alcohol, the temperature of PS melt can be greatly reduced.
In embodiment: the CO2 foaming agent is the liquid CO 2 that purity is greater than 99%, and mass percentage is polystyrene
The 3 ~ 5% of raw material, the CO2 foaming agent are injected in the melt zone of the extrusion foaming unit, 20 ~ 25MPa of injection pressure.
In embodiment, as shown in Fig. 1 ~ 3, a kind of preparation facilities of the extruded polystyrene foam board using CO2 foaming,
Be characterized in that: including extrusion foaming unit 1 and liquid CO 2 injection device 2, the extrusion foaming unit 1 includes setting gradually
Host 101, heat exchanger 102, head 103 and pressing traction device 104, the injection pipe 205 of the liquid CO 2 injection device 2
It is arranged in the barrel of the head 103, and nozzle is close to the bottom of screw channel.The present embodiment structure is that a kind of realization is above-mentioned
The device of preparation method, injection pipe 205 can be realized CO2 foaming agent and expand from inside to outside along the radial direction of screw rod through reasonable settings
It dissipates, to achieve the effect that improve degree of mixing of the CO2 in PS melt.
In embodiment, as shown in figure 3, the screw rod of the head 103 is equipped with one section of notch 105 for lacking spiral shell rib, it is described
Injection pipe 205 is arranged in the notch 105.This structure is a kind of specific arrangement of injection pipe 205.In addition to this,
Injection pipe 205 can also be provided inside screw, realize CO2 foaming agent along spiral shell in the form of injection hole is opened at the screw channel bottom in screw rod
The radial direction of bar is spread from inside to outside.
In embodiment, as shown in Figure 1, the liquid CO 2 injection device 2 includes head tank 201, the force (forcing) pump being sequentially communicated
202, surge tank 203, injection pump 204 and injection pipe 205.When using CO2 as foaming agent, the liquid CO 2 that supplier provides is more
It for -20 DEG C, 2MPa or so, needs to carry out insulation to pipeline, pump, valve etc., therefore, the present embodiment is used in pipe-line system
The method of middle surge tank 203 maintains the pressure of surge tank 203 in 6MPa or so, and delivery temperature is close to environment temperature.Due to output
Pressure is up to 20 ~ 25MPa, and when using CO2 as foaming agent, preferred diaphragm pump makees injection pump 204, to prevent leakage, and
From cost consideration, select plunger pump as force (forcing) pump 202.In addition force (forcing) pump 202 and 204 two sides of injection pump should be all equipped with
Valve or setting bypass.
Obviously, the above embodiment of the present invention is intended to be merely illustrative of the present example, and not to the present invention
Embodiment restriction.For those of ordinary skill in the art, it can also make on the basis of the above description
Other various forms of variations or variation.There is no need and unable to give poor example to all embodiments.And these belong to this
The connotation changes and variations that derived from of invention still fall within protection scope of the present invention.
Claims (10)
1. a kind of preparation method of the extruded polystyrene foam board using CO2 foaming, it is characterised in that: by polystyrene original
Extrusion foaming unit is added to after material, nucleating agent and blowing promotor mixing, is injected in after CO2 foaming agent and is foamed；The CO2
Foaming agent is spread from inside to outside along the radial direction of screw rod.
2. the preparation method of the extruded polystyrene foam board according to claim 1 using CO2 foaming, feature exist
In: the polystyrene raw material is polystyrene blend styrene-acrylonitrile copolymer.
3. the preparation method of the extruded polystyrene foam board according to claim 1 using CO2 foaming, feature exist
In: the nucleating agent refers to carbonate nucleating agent.
4. the preparation method of the extruded polystyrene foam board according to claim 1 using CO2 foaming, feature exist
In: the blowing promotor include the ethyl alcohol that purity is greater than 99%, it is compound with HCFC-134a, HFC-152a, normal butane, iso-butane or
One of HFO-1234ze or a variety of.
5. the preparation method of the extruded polystyrene foam board according to claim 4 using CO2 foaming, feature exist
In: in the blowing promotor, the mass percentage of ethyl alcohol is 1 ~ 3%, HCFC-134a of polystyrene raw material, HFC-152a,
Normal butane, iso-butane and the total mass percentage of HFO-1234ze are the 1 ~ 2% of raw material.
6. the preparation method of the extruded polystyrene foam board according to claim 1 using CO2 foaming, feature exist
In: the CO2 foaming agent is the liquid CO 2 that purity is greater than 99%, and mass percentage is the 3 ~ 5% of polystyrene raw material.
7. the preparation method of the extruded polystyrene foam board according to claim 1 using CO2 foaming, feature exist
In: the CO2 foaming agent is injected in the melt zone of the extrusion foaming unit, 20 ~ 25MPa of injection pressure.
8. a kind of preparation facilities of the extruded polystyrene foam board using CO2 foaming, it is characterised in that: including extrusion foaming machine
Group (1) and liquid CO 2 injection device (2), the extrusion foaming unit (1) includes host (101), the heat exchanger set gradually
(102), injection pipe (205) setting of head (103) and pressing traction device (104), the liquid CO 2 injection device (2) exists
In the barrel of the head (103), and nozzle is close to the bottom of screw channel.
9. the preparation facilities of the extruded polystyrene foam board according to claim 8 using CO2 foaming, feature exist
In: the screw rod of the head (103) is equipped with one section of notch (105) for lacking spiral shell rib, and the injection pipe (205) is arranged described
In notch (105).
10. the preparation facilities of the extruded polystyrene foam board according to claim 8 using CO2 foaming, feature exist
In: the liquid CO 2 injection device (2) includes the head tank (201) being sequentially communicated, force (forcing) pump (202), surge tank (203), note
Enter pump (204) and injection pipe (205).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811639938.2A CN109501192A (en) | 2018-12-29 | 2018-12-29 | Using CO2The preparation method and preparation facilities of the extruded polystyrene foam board of foaming |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811639938.2A CN109501192A (en) | 2018-12-29 | 2018-12-29 | Using CO2The preparation method and preparation facilities of the extruded polystyrene foam board of foaming |
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| Publication Number | Publication Date |
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| CN109501192A true CN109501192A (en) | 2019-03-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811639938.2A Pending CN109501192A (en) | 2018-12-29 | 2018-12-29 | Using CO2The preparation method and preparation facilities of the extruded polystyrene foam board of foaming |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1334283A (en) * | 2000-06-22 | 2002-02-06 | 三井化学株式会社 | Injection foaming method and apparatus and composition |
| CN101003174A (en) * | 2006-12-28 | 2007-07-25 | 中北大学 | Forming machine for extruding assistant high molecular material in supercritical fluid |
| CN102161774A (en) * | 2011-01-26 | 2011-08-24 | 南京法宁格节能科技有限公司 | Method for producing polystyrene extruded sheets by using carbon dioxide foaming agent |
| CN206718318U (en) * | 2017-04-01 | 2017-12-08 | 信电电线（深圳）有限公司 | Foam extruder |
| CN209682860U (en) * | 2018-12-29 | 2019-11-26 | 浙江金佳塑料机械有限公司 | Using the preparation facilities of the extruded polystyrene foam board of CO2 foaming |
-
2018
- 2018-12-29 CN CN201811639938.2A patent/CN109501192A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1334283A (en) * | 2000-06-22 | 2002-02-06 | 三井化学株式会社 | Injection foaming method and apparatus and composition |
| CN101003174A (en) * | 2006-12-28 | 2007-07-25 | 中北大学 | Forming machine for extruding assistant high molecular material in supercritical fluid |
| CN102161774A (en) * | 2011-01-26 | 2011-08-24 | 南京法宁格节能科技有限公司 | Method for producing polystyrene extruded sheets by using carbon dioxide foaming agent |
| CN206718318U (en) * | 2017-04-01 | 2017-12-08 | 信电电线（深圳）有限公司 | Foam extruder |
| CN209682860U (en) * | 2018-12-29 | 2019-11-26 | 浙江金佳塑料机械有限公司 | Using the preparation facilities of the extruded polystyrene foam board of CO2 foaming |
Non-Patent Citations (1)
| Title |
|---|
| 张永佳;刘本刚;王向东;王亚桥;陈鹏;王文博;: "成核剂对聚苯乙烯挤出发泡板材性能的影响", 中国塑料, no. 02, pages 64 - 70 * |
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