CN1096735A - Recovering waste foam polystyrene by gel foam remoing method material modified polystyrene plastic made - Google Patents
Recovering waste foam polystyrene by gel foam remoing method material modified polystyrene plastic made Download PDFInfo
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- CN1096735A CN1096735A CN93111865A CN93111865A CN1096735A CN 1096735 A CN1096735 A CN 1096735A CN 93111865 A CN93111865 A CN 93111865A CN 93111865 A CN93111865 A CN 93111865A CN 1096735 A CN1096735 A CN 1096735A
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- solvent
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- gelation
- foam
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
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- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
The invention provides the applicable technology of a kind of recovery polystyrene foam plastics (PSF) discarded object and regeneration MPS (PS) plastics.It is characterized in that adding higher boiling gelation mixed solvent and make the waste foam deaeration become the gel material, then with modified resin, auxiliary agent mixing after the granulation of multistage steam discharge extruder thermoplastic gets finished product.For example: 6.4 liters of kerosene add 1.6 liters of chlorobenzenes be mixed the gelation mixed solvent, add the .04g plastics indigo plant yellow that disappears, dissolve in 0.4kgSBS, then the 7.6kgPSF discarded object is filled in wherein deaeration and get the gel material, spread simultaneously and add 40g titanium dioxide mixing, by the granulation of two-stage steam discharge formula extruder thermoplastic, solvent is reclaimed in condensation simultaneously again.The gained pellet belongs to toughness reinforcing PS, and electrical property is good, is suitable for processing and fabricating stationery, toy and multiple daily living article and electric parts.
Description
The invention provides the applicable technology that a kind of recovery polystyrene foam plastics (PSF) discarded object and regeneration strengthen polystyrene.
The original article form of PSF is expandable polystyrene (EPS), about 2,000,000 tons of the yearly productive capacity of whole world EPS.Wherein, West Europe accounts for half; China also reaches 2.5 ten thousand tons, and nearly 100,000 tons of import throughout the year.The consumption figure that Europe, the United States, day PSF that produces of institute are used as packaging material accounts for 1/2,2/3 and 4/5 of this area's total quantity consumed successively.At present, China produces surplus the PSF ten ten thousand tons per year, and major part is also as packaging material.And the PSF discarded object is mainly from disposable guarantor's packaging material.In addition, the waster of foam molding processing factory and cutting leftover pieces amount are also considerable.PSF discarded amount in the whole world is above 500,000 tons in the time of 1980.In China, only the television set packing just reaches 1.5 ten thousand tons with the year discarded amount of PSF, and the discarded along the line PSF convenient mess tin of railway also can be found everywhere.This type of waste foam is little because of density, so it is big to take up space, takes up an area of extensively, and itself is inflammable to be difficult for again agingly rotting to disappear voluntarily to ruin, and serious environment pollution or become the heavy burden of relevant enterprise accumulates over a long period.How these discarded objects of reasonable use have caused knowledgeable people's common concern, and have disclosed a series of research reports and patented technology (plastics industry, 1991, (2): 13).
The prior art that reclaims the PSF discarded object can reduce following a few class:
1. directly burn and utilize heat energy;
2. carbonization decomposition reclaims solvent or further refines styrene;
3. be used as lightweight thermal insulation, acoustic material or be used as dank material with cement-bonded after the Mechanical Crushing;
4. be used as the soil improvement material or the pipe filtering material on every side that underdrains after the mechanical crushing;
5. use dissolution method modified pitch, rosin, or be used to make water-repellent paint or binding agent;
6. thermoplastic is processed into moulding compound or modification moulding compound;
7. regeneration system EPS is for being molded as foam plastic product again.
I wait the technical study (CN91108317.) of having finished new legal system regeneration EPS, and am existing just in promotion and implementation.In this patent, utilized the gelation deaeration phenomenon of PSF in PS good solvent～non-solvent mixed liquor.Its mechanism is that PS easily combines with the gelation mixed liquor of being prepared and limited swelling takes place.And when the undercapacity of gel mould during with the making a concerted effort of the buoyancy of the surface tension of bearing gel mould, steam bubble and mechanical presses power, gel mould will break deaeration and form gel material group.And gelation mixed liquor more than needed still keeps easy flowable state, is easy to continue performance gelation deaeration effect.The technical program has also been utilized this gelation deaeration principle, and difference is selected mixed solvent boiling point up to more than 120 ℃, and volatility is little.Thereby gained gel material group no longer is suitable for preparation, regeneration EPS, but is more suitable for making the blending and modifying moulding compound.
In the prior art, utilize the thermoplastic method to reclaim PSF discarded object preparation, regeneration modification PS moulding compound and comprise following three kinds of methods: i.e. Mechanical Crushing after heat is moulded behind comminution granulation, hot pressing or the hot melt fragmentation and is added steam discharge extrusion molding behind modified additive thermoplastic comminution granulation and the sol method material again.Though these methods can be processed into the PSF discarded object moulding compound or modification moulding compound, exist some deficiency respectively, comminution granulation is moulded in after heat as Mechanical Crushing, and the particle bulk density is too little, difficult and modified materials mixing, and device efficiency is very low; Fragmentation adds modified additive thermoplastic comminution granulation again and need be heated once more behind hot pressing or the hot melt, and the efficient low energy consumption is big when more serious and pre-hot pressing of resin thermal-oxidative degradation or hot melt; Sol method material steam discharge extruding pelletization method, solvent (as banana oil) volatilizing loss is too big, inflammable and explosive, the scene material is dangerous, and solvent load is up to 1.5～2 times of PSF amount, simultaneously along with the increase of molten material amount, dissolved adhesiveness increases, molten material speed declines to a great extent, and because of gained colloidal sol viscosity is big, handles operating difficulties.Above method all can not be changed material at the scene, and need to transport the PSF waste foam at a distance very uneconomical economically.
For overcoming the deficiencies in the prior art, the present invention adopts following technical scheme: the PSF waste foam is filled in deaeration gets gel material group in the higher boiling gelation mixed solvent, added modified resin and auxiliary agent mixing.By multistage steam discharge extruder, when mixed solvent is reclaimed in condensation, thermoplastic extruded stock bar, cooling, pelletizing, pack toughness reinforcing PS finished product.Recovered solvent can be used further to gelation deaeration PSF waste foam.
The used gelation mixed solvent of the present invention belongs to the little higher boiling of volatility (〉=120 ℃) hydrophobicity organic solvent.It is that non-solvent that good solvent with PS adds an amount of PS is mixed and forms in fact.Mixed ratio does not have strict regulations, is criterion can successfully make deaeration of PSF gel and economy, and the content of good solvent between 10～40%V/V, depends primarily on operating temperature usually in the gelation mixed solvent.When operating temperature was hanged down, good solvent content needed suitably to increase, otherwise then can suitably reduce.
Above-mentioned non-solvent recommends to use the petroleum cuts of high boiling range (120～300 ℃), and it is a Main Ingredients and Appearance with the saturated hydrocarbons of C8～C16.For example solvent naphtha, kerosene, diesel oil and even some gasoline and solvent naphtha all can.
Good solvent recommends to use acetate, aromatic solvent naphtha, chlorobenzene (or neighbour-dichloro-benzenes).Acetate toxicity minimum, the aromatic naphtha price is minimum, and the proportion of chlorobenzene (or neighbour-dichloro-benzenes) is big more than above-mentioned non-solvent, is beneficial to the composition that reclaims mixed solvent with the hydrometer method measuring and calculating.
The major defect of PS is that property is crisp, so toughening modifying is an emphasis direction.The toughening modifying resin of selecting for use is various styrene～butadiene copolymers, and as SB, SBS, MBS and butadiene-styrene rubber, its consumption is 5～20%.
For improving the performance of regeneration PS resin, also can add other auxiliary agent, as titanium dioxide etc.
Multistage steam discharge formula screw extruder thermoplastic granulation condition: operating temperature is 150～250 ℃, and the operation vapour pressure is 760～20 torrs.
By this scheme, 1 cubic metre of gelation mixed solvent can make 1 ton of PSF discarded object change into gel material group, can dwindle into 80～100 cubic metres of waste foam deposits 2 cubic metres gel material group.Used mixed solvent volatility is little in addition, thereby can pile up the site safety material at waste foam has solved the low difficult problem of conevying efficiency; And the not sticking utensil of gained gel material, easy operating is suitable for large-tonnage production.Moreover, also help by this scheme and to ensure the quality of products.This be because: the first, by this gel blend, be easier to guarantee that the product quality is even; Second; avoided the hot melt deaeration again crush method make the rotten possibility of regenerant thermal oxide, and device efficiency is much higher, the 3rd, even in the hot melt granulation stage; owing to have solvent vapo(u)r to protect hot oxygen side effect also greatly to relax, only need increase the pusher drawing-in device of screw rod.
Make a silk purse out of a sow's ear by this scheme, three-waste free pollution not only has the social benefit of curbing environmental pollution again, and cost is lower because reconstituted product is worth higher, and economic benefit is also very remarkable.
Toughness reinforcing PS plastics by this scheme reclaiming are being easy to various colors, or are realizing filling-modified, flame-retardant modified simultaneously.The gained plastics not only are suitable for making stationery, toy and multiple daily necessities, also can be used for the multiple electric parts of moulding.
Embodiment one
Normal octane 8mL, butyl acetate 2mL drops into PSF after mixing slowly, and deaeration gets the gel material rapidly, when mixed liquor is suffered all, drops into PSF 12.5g altogether, gets the 19.6g of gel material group, and the dry-basis moisture content that calculates the gel material is 56.8%, and the solvent loss rate is 3.7%.
Embodiment two
Normal octane 8mL after dimethylbenzene 2mL mixes, drops into 12.5g PSF, and is consuming time less than 5min, gets gel material 19.8g, and its dry-basis moisture content is 58.4%, and the solvent loss rate is 0.8%.
Embodiment three
Xylene content is 20%(V/V in dimethylbenzene～kerosene mixed liquor), when operating temperature is 25 ℃, can make the PSF gelation deaeration that blows slowly, when operating temperature was reduced to 10 ℃, gelling was obviously slowed down; When operating temperature rose to 45 ℃, gelation deaeration effect was carried out to such an extent that be exceedingly fast.
Embodiment four
Xylene content reaches 30%(V/V in dimethylbenzene～kerosene mixed liquor) time, operating temperature only 10 ℃ also can make the PSF gel deaeration that blows slowly; Otherwise when xylene content only 10%, and operating temperature is when being 45 ℃, can make the PSF gel deaeration that blows slowly in the same old way.
Embodiment five
Kerosene 6.4L add chlorobenzene 1.6L join the gelation mixed solvent, add the blue 4GN of the 0.04g plastics Huang that disappears, and dissolve in SBS(YH-791) 0.4kg, then 7.6kg PSF being filled in wherein makes its deaeration get the gel material, also spread several times in this process and add titanium dioxide (rutile-type) 40g, gained gel material seems to be white viscosity coarse staple fibre and piles up and form.By 200 ℃ of thermoplastic granulations of steam discharge formula screw extruder, mixed solvent is reclaimed in condensation simultaneously with this gel material.200 ℃ of injection moulding standard components of gained enhancing touthness of polyphenylethylene by adding pellet are light grey, any surface finish, and The performance test results is as follows:
Pellet melt flow index: 34.9g/10min(200 ℃ 500g)
Elongation at break: 20～28%
Impact strength: non-notch can reach 14.4kJ/m
2
The jagged 4.3kJ/m that reaches
2
Rockwell hardness: R110
Specific insulation: 7.5X10
14Ω .m
Surface resistivity: 3.9X10
13Ω
Dielectric constant: 2.61(60Hz) 2.59(1MHz)
Dielectric loss angle tangent: 1.1X10
-3(60Hz)
6.0X10
-4（1MHz）
Electrical strength: 20.9MV/m
Claims (7)
1, a kind of recovery polystyrene foam plastics (PSF) discarded object and be processed into the method for MPS (PS) plastics, it is characterized in that adding higher boiling (＞100 ℃) gelation mixed solvent and make the deaeration of PSF discarded object become the gel material, get product through the granulation of steam discharge formula screw extruder thermoplastic again.
2, method according to claim 1 is characterized in that used gelation mixed solvent comes down to form in suitable ratio allotment with the good solvent of PS and the non-solvent of PS.
3, method according to claim 2 is characterized in that used good solvent comprises aromatic hydrocarbons, as toluene, dimethylbenzene; Halogenated hydrocarbons such as chlorobenzene, neighbour-dichloro-benzenes; Ester class such as butyl acetate, amyl acetate and other can dissolve high boiling solvent such as the high boiling aromatic solvent naphtha of PS.
4, method according to claim 2 is characterized in that used non-solvent is that boiling range is 120～300 ℃ a petroleum cuts, and it is a Main Ingredients and Appearance with the saturated hydrocarbons of C8～C16, as solvent naphtha, kerosene, diesel oil and some gasoline and industrial naptha.
5, method according to claim 2 is characterized in that the content of good solvent in the gelation mixed solvent is 5～50%(V/V), is generally 10～30%.
6, method according to claim 1, it is characterized in that to add modified resin and auxiliary agent to improve the quality that reclaims PS, modified resin and auxiliary agent are made a general reference, but toughening modifying resin the most effectively, the various copolymers of styrene～butadiene particularly are as butadiene-styrene rubber, SB, SBS and MBS etc.
7, method according to claim 1 is characterized in that the process conditions of steam discharge formula screw extruder thermoplastic granulation are: 150～250 ℃ of operating temperatures, operation air pressure 760～20 torrs.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93111865A CN1096735A (en) | 1993-06-24 | 1993-06-24 | Recovering waste foam polystyrene by gel foam remoing method material modified polystyrene plastic made |
| JP50229895A JPH09503235A (en) | 1993-06-24 | 1994-06-24 | Method of collecting and utilizing polystyrene foam plastic waste |
| PCT/CN1994/000051 WO1995000582A1 (en) | 1993-06-24 | 1994-06-24 | Processes for recycling waste polystyrene foam |
| AU69934/94A AU6993494A (en) | 1993-06-24 | 1994-06-24 | Processes for recycling waste polystyrene foam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93111865A CN1096735A (en) | 1993-06-24 | 1993-06-24 | Recovering waste foam polystyrene by gel foam remoing method material modified polystyrene plastic made |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1096735A true CN1096735A (en) | 1994-12-28 |
Family
ID=4989618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN93111865A Pending CN1096735A (en) | 1993-06-24 | 1993-06-24 | Recovering waste foam polystyrene by gel foam remoing method material modified polystyrene plastic made |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1096735A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1085225C (en) * | 1997-12-26 | 2002-05-22 | 中国轻工总会塑料加工应用研究所 | Foamed polystyrene waste recovering method and equipment |
| EP1215230A1 (en) * | 2000-12-16 | 2002-06-19 | Victech Co Ltd. | Volume reducing agents for expanded polystyrene, methods and apparatus for processing expanded polystyrene using the same |
| CN100374486C (en) * | 2001-03-28 | 2008-03-12 | 索尼公司 | Method of reclaiming resin |
-
1993
- 1993-06-24 CN CN93111865A patent/CN1096735A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1085225C (en) * | 1997-12-26 | 2002-05-22 | 中国轻工总会塑料加工应用研究所 | Foamed polystyrene waste recovering method and equipment |
| EP1215230A1 (en) * | 2000-12-16 | 2002-06-19 | Victech Co Ltd. | Volume reducing agents for expanded polystyrene, methods and apparatus for processing expanded polystyrene using the same |
| CN100374486C (en) * | 2001-03-28 | 2008-03-12 | 索尼公司 | Method of reclaiming resin |
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| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |