CN102585256A - Method for toughening recovered high density polyethylene plastic - Google Patents
Method for toughening recovered high density polyethylene plastic Download PDFInfo
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- CN102585256A CN102585256A CN201110452607XA CN201110452607A CN102585256A CN 102585256 A CN102585256 A CN 102585256A CN 201110452607X A CN201110452607X A CN 201110452607XA CN 201110452607 A CN201110452607 A CN 201110452607A CN 102585256 A CN102585256 A CN 102585256A
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Abstract
The invention discloses a method for toughening recovered high density polyethylene plastic, and belongs to the field of recycle of materials and resources. Recovered low density polyethylene films are crushed and granulated with an extruder and then blended, cross-linked and extruded with the recovered high density polyethylene plastic. By the method, recycle of wastes is realized, resources are saved, the cost of plastic is reduced, and environmental protection is facilitated; the method is low in cost; on the premise that the rigidity of the recovered high density polyethylene plastic is ensured, the toughness of the recovered high density polyethylene plastic can be remarkably improved; and the toughened recovered high density polyethylene plastic can be used for preparing various pipeline materials and plastic bottles.
Description
Technical field
The present invention relates to a kind of recovery high-density polyethylene plastics method for toughening.
Background technology
Along with the price of plastic raw materials is climbed to a higher point successively, the cost of plastics constantly rises.How adopt new and high technology, strengthen management under the quality product prerequisite guaranteeing, thereby fall the cost of end plastics, to reach desirable high performance-price ratio.One of them is exactly the application development of carrying out reclaimed materials, how to reclaim and promote the reclaimed materials product performance, not only can improve its added value of product, enhances one's market competitiveness, and can also extenuate the pressure of dead meal environmental pollution.Certainly reclaim waste plastic and also have deeper social benefit and considerable economic.
High density polyethylene(HDPE) (High Density Polyethylene abbreviates " HDPE " as) is that a kind of percent crystallinity is high, nonpolar thermoplastic resin.Carrying out toughness reinforcingly to reclaiming HDPE, this big kind general-purpose plastics can be used as engineering plastics, is an important directions researching and developing model engineering plastic both at home and abroad.See from situation about researching and developing both at home and abroad at present; Toughening effect with elastic body toughening is best; In " the Hebei chemical industry " in August, 2011, mention interpolation hub-and-spoke configuration toughening and reinforcing agent SEBS in " research of the energy-conservation prescription of polyvinyl piping materials process for processing " literary composition as strengthening the compatilizer of holding concurrently like Tian Li; SEBS is to be end segments with the PS, and the ethylene-butene copolymer that obtains with the polyhutadiene hydrogenation is the linearity three embedding copolymer elastomers of middle elastomeric block, still; Elastic body toughening makes HDPE toughness (impact strength) when increasing substantially, and rigidity (stretching yield stress, bending elastic modulus) has but significantly reduced; Also useful rigid particles (organic filler, inorganic particulate) is toughness reinforcing, though it has good rigidity, still, the amplitude that toughness improves is little, and mainly is applicable to the reasonable HDPE of toughness.
The new LDPE (film grade) (LDPE) that belongs to the PE class with HDPE together is a kind of plastic material, and it is fit to the various moulding processs of thermoplastic molding's processing, and forming process property is good.The LDPE main application is to make film product, also is used for injection-molded item, medical apparatus, medicine and packaging material for food, blowing slush molding goods etc.LDPE toughness is good, and also fine with the HDPE consistency, therefore considers in modifying process, to add a certain amount of LDPE, with the obvious toughness of improving material.But the price comparison of pure LDPE is high, and cost can increase thereupon, therefore can consider to select for use the LDPE of recovery.Chinese patent CN102093616A provides a kind of method that plastic pipe is made in the regeneration of waste or used plastics woven bag that reclaims; This method has just been used the LDPE of recovery and the HDPE of recovery; Its concrete proportioning is 39.2 kilograms for the LDPE58.8 kilogram that reclaims, the HDPE of recovery, 0.5 kilogram of the plastics skimmer of 1.5 kilograms of colour batches and routine, and it has reduced production cost; Solved white pollution simultaneously; But this patent proportioning raw materials is main with LDPE, has only used simple blend, and the not mentioned performance that becomes tubing.
Summary of the invention
The object of the present invention is to provide a kind of cost low, guaranteeing under the recovery high-density polyethylene plastics inflexible prerequisite, can significantly improve its flexible recovery high-density polyethylene plastics method for toughening.
Above-mentioned technical purpose of the present invention is achieved through following technical scheme: a kind of recovery high-density polyethylene plastics method for toughening; It is characterized in that; The low-density polyethylene film pulverizing forcing machine that reclaims is reproduced the grain back extrude, specifically comprise the steps: with the high-density polyethylene plastics blended cross linking that reclaims
(1) will reclaim that low-density polyethylene film reproduces grain 20% ~ 50%, linking agent speed with 1300 ~ 1500rpm in high-speed mixer of reclaiming high-density polyethylene plastics 55% ~ 85%, 0.5% ~ 1% is mixed 10 ~ 20min;
(2) utilize forcing machine with the crosslinked extrused step of the speed of 100 ~ 200 rpm (1) gained blend;
(3) with after the pelletizing of step (2) gained extrudate 75 ~ 85
oThe down dry 3 ~ 5hr of C.
The present invention is main to reclaim high density polyethylene(HDPE); Reproducing grain with the recovery low-density polyethylene film utilizes blended cross linking to extrude; Ldpe film all is disposable materials used mostly; The product of granulation is comparatively clean once more, and toughness is good, not only can be toughness reinforcing after adding through blend but also can too not increase cost.Come granulation once more with the low-density polyethylene film feed back, can avoid directly being used for blend disperses uneven and influences blended characteristic.
In order to obtain better blend effect, as of the present invention preferred, the said low-density polyethylene film granularity of granulation again is 20 ~ 40 orders.
As of the present invention preferred, linking agent is at least a in Witcizer 300 (DBP), DOP (DOP), Lucidol (BPO), the tributyl phosphate (TBP) in the said step (1).
The HDPE feed back that has a large amount of different sourcess in the market wherein mainly contains bottle material lid, injection molding material, little hollow material, big hollow material etc.And the HDPE reclaimed materials in every kind of source uses historical and performance all has difference to a great extent; Wherein bottle cap material uses historical weak point, stable performance, collection easily, modification easy; But its quality light weight is few, only uses this raw material to influence product-feed, industrial scale and enterprise development.Other HDPE feed back performance differences are bigger, use historical length, even some is through twice three times processing, has increased the difficulty of modification.Especially in order to increase the viscosity of material, reduce melting index, the toughness of material descends serious.Because of confirming different prescriptions according to the classification of HDPE raw material purposes.
In view of the foregoing, as of the present invention further preferred, said recovery high-density polyethylene plastics is the compound that reclaims high-density polyethylene bottle lid material, reclaims high density polyethylene(HDPE) injection molding material and/or the little hollow material of recovery high density polyethylene(HDPE).Wherein each component weight percentage is: reclaim high-density polyethylene bottle lid material 20 ~ 40%, reclaim high density polyethylene(HDPE) injection molding material 30 ~ 50% and/or reclaim the little hollow material 15% ~ 35% of high density polyethylene(HDPE).
As of the present invention further preferred, said recovery high-density polyethylene plastics is the compound that reclaims high-density polyethylene bottle lid material, reclaims high density polyethylene(HDPE) injection molding material and/or the big hollow material of recovery high density polyethylene(HDPE).Wherein each component weight percentage is: reclaim high-density polyethylene bottle lid material 25 ~ 45%, reclaim high density polyethylene(HDPE) injection molding material 35 ~ 60% and/or reclaim the big hollow material 10% ~ 25% of high density polyethylene(HDPE).
Simultaneously, the present invention also provides a kind of toughness reinforcing recovery high-density polyethylene plastics of using method for preparing, and the plastics tubing and the Plastic Bottle that utilize this plastics preparation.
In sum, the present invention compared with prior art has following outstanding advantage and beneficial effect:
1, the present invention uses and reclaims the film LDPE HDPE crosslinked blend of granulation to reclaiming again, and toughness reinforcing, has not only realized the cycling and reutilization of refuse, has practiced thrift resource, has reduced the plastics cost, also helps environment protection;
2, the recovery HDPE of the present invention's preparation is because flexible obviously improves, and impact resistance significantly improves, and can be used for preparing various pipeline materials, also can be blow molded into bottle;
3, the toughness of the prepared recovery of the present invention HDPE can improve 75% at least; And rigidity remains unchanged basically; Compare with other method of modifying, the simple to operate and gained of the present invention reclaims HDPE density and decreases, and density reduces and can under identical quality, obtain more goods.
Embodiment
Below in conjunction with embodiment the present invention is done further explain.
Embodiment 1
A kind of recovery high-density polyethylene plastics method for toughening comprises the steps:
(1) low-density polyethylene film that reclaims is reproduced grain 15%, reclaims high-density polyethylene plastics 84.5%, linking agent 0.5% speed with 1300rpm in high-speed mixer is mixed 20min;
(2) utilizing forcing machine is 180 with speed, each section of the forcing machine temperature of 100rpm
oC, 180
oC, 190
oC, 200
oC, 200 ℃, 210 ℃, 210 ℃, crosslinked extrused step (1) gained blend under 200 ℃ the condition;
(3) with after the pelletizing of step (2) gained extrudate 75
oDry 5hr under the C.
Improved 75% before adopting the shock strength of recovery HDPE of this method for toughening preparation more toughness reinforcing.
Embodiment 2
A kind of recovery high-density polyethylene plastics method for toughening specifically comprises the steps:
(1) DOP speed with 1500rpm in high-speed mixer of the low-density polyethylene film granulation again (granularity is 20 ~ 40 orders) 50% of reclaiming, recovery high-density polyethylene bottle lid material 20%, recovery high density polyethylene(HDPE) injection molding material 29.5%, 0.5% is mixed 10min;
(2) utilizing forcing machine is 180 with speed, each section of the forcing machine temperature of 200rpm
oC, 190
oC, 200
oC, 210
oC, 210
oC, 220
oC, 220
oC, 200
oCrosslinked extrused step (1) gained blend under the condition of C;
(3) with after the pelletizing of step (2) gained extrudate 85
oDry 3hr under the C.
Improved 80% before adopting the shock strength of recovery HDPE of this method for toughening preparation more toughness reinforcing.
Embodiment 3
A kind of recovery high-density polyethylene plastics method for toughening specifically comprises the steps:
(1) the low-density polyethylene film granulation again (granularity is 20 ~ 40 orders) 34.5% of reclaiming, recovery high-density polyethylene bottle lid material 40%, high density polyethylene(HDPE) injection molding material 25%, the DBP0.5% speed with 1400rpm in high-speed mixer that reclaims are mixed 15min;
(2) utilizing forcing machine is 180 with speed, each section of the forcing machine temperature of 150rpm
oC, 190
oC, 200
oC, 210
oC, 210
oC, 220
oC, 220
oC, 200
oCrosslinked extrused step (1) gained blend under the condition of C;
(3) with after the pelletizing of step (2) gained extrudate 85
oDry 3hr under the C.
Improved 82% before adopting the shock strength of recovery HDPE of this method for toughening preparation more toughness reinforcing.
Embodiment 4
A kind of recovery high-density polyethylene plastics method for toughening specifically comprises the steps:
(1) with the low-density polyethylene film granulation again (granularity is 20 ~ 40 orders) 19.5% of reclaiming, reclaim high-density polyethylene bottle lid material 30%, reclaim high density polyethylene(HDPE) injection molding material 35%, BPO speed with 1400rpm in high-speed mixer of reclaiming the little hollow material 15%, 0.5% of high density polyethylene(HDPE) mixes 20min;
(2) utilizing forcing machine is 180 with speed, each section of the forcing machine temperature of 150rpm
oC, 190
oC, 200
oC, 210
oC, 210
oC, 220
oC, 220
oC, 200
oCrosslinked extrused step (1) gained blend under the condition of C;
(3) with after the pelletizing of step (2) gained extrudate 80
oDry 4hr under the C.
Improved 85% before adopting the shock strength of recovery HDPE of this method for toughening preparation more toughness reinforcing.
Embodiment 5
A kind of recovery high-density polyethylene plastics method for toughening specifically comprises the steps:
(1) with the low-density polyethylene film that reclaims reproduce grain 19%, reclaim high-density polyethylene bottle lid material 20%, reclaim high density polyethylene(HDPE) injection molding material 25%, DOP speed with 1400rpm in high-speed mixer of reclaiming the little hollow material 35%, 1% of high density polyethylene(HDPE) mixes 15min;
(2) utilizing forcing machine is 180 with speed, each section of the forcing machine temperature of 200rpm
oC, 190
oC, 200
oC, 210
oC, 210
oC, 220
oC, 220
oC, 200
oExtrusion step under the condition of C (1) gained blend;
(3) with after the pelletizing of step (2) gained extrudate 80
oDry 4hr under the C.
Improved 80% before adopting the shock strength of recovery HDPE of this method for toughening preparation more toughness reinforcing.
Embodiment 6
A kind of recovery high-density polyethylene plastics method for toughening specifically comprises the steps:
(1) low-density polyethylene film that reclaims is reproduced (granularity is 20 ~ 40 orders) grain 34%, reclaims high-density polyethylene bottle lid material 25%, reclaims high density polyethylene(HDPE) injection molding material 40%, TBP1% speed with 1400rpm in high-speed mixer is mixed 15min;
(2) utilizing forcing machine is 180 with speed, each section of the forcing machine temperature of 200rpm
oC, 190
oC, 200
oC, 210
oC, 210
oC, 220
oC, 220
oC, 200
oCrosslinked extrused step (1) gained blend under the condition of C;
(3) with after the pelletizing of step (2) gained extrudate 80
oDry 4hr under the C.
Improved 88% before adopting the shock strength of recovery HDPE of this method for toughening preparation more toughness reinforcing.
Embodiment 7
A kind of recovery high-density polyethylene plastics method for toughening specifically comprises the steps:
(1) with the low-density polyethylene film granulation again (granularity is 20 ~ 40 orders) 15% of reclaiming, reclaim high-density polyethylene bottle lid material 39%, reclaim high density polyethylene(HDPE) injection molding material 35%, reclaim the big hollow material of high density polyethylene(HDPE) 10%, DOP 0.2%, TBP0.8% speed with 1400rpm in high-speed mixer mix 15min;
(2) utilizing forcing machine is 180 with speed, each section of the forcing machine temperature of 200rpm
oC, 190
oC, 200
oC, 210
oC, 210
oC, 220
oC, 220
oC, 200
oCrosslinked extrused step (1) gained blend under the condition of C;
(3) with after the pelletizing of step (2) gained extrudate 80
oDry 5hr under the C.
Improved 85% before adopting the shock strength of recovery HDPE of this method for toughening preparation more toughness reinforcing.
Embodiment 8
A kind of recovery high-density polyethylene plastics method for toughening specifically comprises the steps:
(1) with the low-density polyethylene film granulation again (granularity is 20 ~ 40 orders) 15% of reclaiming, reclaim high-density polyethylene bottle lid material 30%, reclaim high density polyethylene(HDPE) injection molding material 36.5%, reclaim the big hollow material of high density polyethylene(HDPE) 18%, DBP 0.3%, BPO 0.2% speed with 1300rpm in high-speed mixer mix 15min;
(2) utilizing forcing machine is 180 with speed, each section of the forcing machine temperature of 200rpm
oC, 190
oC, 200
oC, 210
oC, 210
oC, 220
oC, 220
oC, 200
oCrosslinked extrused step (1) gained blend under the condition of C;
(3) with after the pelletizing of step (2) gained extrudate 85
oDry 4hr under the C.
Improved 90% before adopting the shock strength of recovery HDPE of this method for toughening preparation more toughness reinforcing.
Embodiment 9
A kind of recovery high-density polyethylene plastics method for toughening specifically comprises the steps:
(1) the low-density polyethylene film granulation again (granularity is 20 ~ 40 orders) 44% of reclaiming, recovery high-density polyethylene bottle lid material 25%, high density polyethylene(HDPE) injection molding material 30%, DOP 0.3%, BPO 0.8% speed with 1300rpm in high-speed mixer that reclaims are mixed 15min;
(2) utilizing forcing machine is 180 with speed, each section of the forcing machine temperature of 150rpm
oC, 190
oC, 200
oC, 210
oC, 210
oC, 220
oC, 220
oC, 200
oCrosslinked extrused step (1) gained blend under the condition of C;
(3) with after the pelletizing of step (2) gained extrudate 80
oDry 4hr under the C.
Improved 85% before adopting the shock strength of recovery HDPE of this method for toughening preparation more toughness reinforcing.
Embodiment 10
A kind of recovery high-density polyethylene plastics method for toughening specifically comprises the steps:
(1) with the low-density polyethylene film granulation again (granularity is 20 ~ 40 orders) 17% of reclaiming, reclaim high-density polyethylene bottle lid material 30%, reclaim high density polyethylene(HDPE) injection molding material 35%, reclaim the big hollow material of high density polyethylene(HDPE) 17.5, DOP 0.2%, BPO 0.2%, TBP0.1% speed with 1300rpm in high-speed mixer mix 15min;
(2) utilizing forcing machine is 180 with speed, each section of the forcing machine temperature of 150rpm
oC, 190
oC, 200
oC, 210
oC, 210
oC, 220
oC, 220
oC, 200
oCrosslinked extrused step (1) gained blend under the condition of C;
(3) with after the pelletizing of step (2) gained extrudate 80
oDry 4hr under the C.
Improved 90% before adopting the shock strength of recovery HDPE of this method for toughening preparation more toughness reinforcing.
This specific embodiment only is to explanation of the present invention; It is not the restriction to invention; Those skilled in the art can make any modification to present embodiment as required after reading this specification sheets, but as long as in claim scope of the present invention, all receive the protection of patent law.
Claims (10)
1. one kind is reclaimed the high-density polyethylene plastics method for toughening, it is characterized in that, the low-density polyethylene film pulverizing, the forcing machine that reclaim is reproduced the grain back extrude with the high-density polyethylene plastics blended cross linking that reclaims, and specifically comprises the steps:
(1) will reclaim that low-density polyethylene film reproduces grain 15% ~ 50%, linking agent speed with 1300 ~ 1500rpm in high-speed mixer of reclaiming high-density polyethylene plastics 55% ~ 85%, 0.5% ~ 1% is mixed 10 ~ 20min;
(2) utilize the speed and 180 ~ 220 of forcing machine with 100 ~ 200 rpm
oTemperature crosslink extrusion step (1) the gained blend of C;
(3) with after the pelletizing of step (2) gained extrudate 75 ~ 85
oThe down dry 3 ~ 5hr of C.
2. a kind of recovery high-density polyethylene plastics method for toughening according to claim 1 is characterized in that the said low-density polyethylene film granularity of granulation again is 20 ~ 40 orders.
3. a kind of recovery high-density polyethylene plastics method for toughening according to claim 2; It is characterized in that linking agent is at least a in Witcizer 300, DOP, Lucidol, the tributyl phosphate in the said step (1).
4. a kind of recovery high-density polyethylene plastics method for toughening according to claim 3; It is characterized in that said recovery high-density polyethylene plastics is for reclaiming the compound that the high-density polyethylene bottle lid is expected, reclaimed the high density polyethylene(HDPE) injection molding material and/or reclaims the little hollow material of high density polyethylene(HDPE).
5. a kind of recovery high-density polyethylene plastics method for toughening according to claim 3; It is characterized in that said recovery high-density polyethylene plastics is for reclaiming the compound that the high-density polyethylene bottle lid is expected, reclaimed the high density polyethylene(HDPE) injection molding material and/or reclaims the big hollow material of high density polyethylene(HDPE).
6. a kind of recovery high-density polyethylene plastics method for toughening according to claim 4; It is characterized in that each component weight percentage is in the said recovery high-density polyethylene plastics: reclaim high-density polyethylene bottle lid material 20 ~ 40%, reclaim high density polyethylene(HDPE) injection molding material 25 ~ 45% and/or reclaim the little hollow material 15% ~ 35% of high density polyethylene(HDPE).
7. a kind of recovery high-density polyethylene plastics method for toughening according to claim 5; It is characterized in that each component weight percentage is in the said recovery high-density polyethylene plastics: reclaim high-density polyethylene bottle lid material 25 ~ 40%, reclaim high density polyethylene(HDPE) injection molding material 30 ~ 40% and/or reclaim the big hollow material 10% ~ 25% of high density polyethylene(HDPE).
8. an application rights requires the toughness reinforcing recovery high-density polyethylene plastics of 2 said methods preparations.
9. plastics tubing that utilizes the described toughness reinforcing recovery high-density polyethylene plastics preparation of claim 8.
10. Plastic Bottle that utilizes the described toughness reinforcing recovery high density polyethylene(HDPE) of claim 8 to process.
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| CN201110452607XA CN102585256A (en) | 2011-12-30 | 2011-12-30 | Method for toughening recovered high density polyethylene plastic |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110452607XA CN102585256A (en) | 2011-12-30 | 2011-12-30 | Method for toughening recovered high density polyethylene plastic |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103571011A (en) * | 2013-10-14 | 2014-02-12 | 肇庆市盛林再生资源有限公司 | HDPE (High-density polyethylene) hollow winding pipe special plastic prepared by waste polyethylene cable rubber powder |
| CN107841026A (en) * | 2017-11-29 | 2018-03-27 | 广东聚航新材料研究院有限公司 | A kind of preparation method of Controllable cross-linking polyethylene |
| CN108034104A (en) * | 2017-11-17 | 2018-05-15 | 神华集团有限责任公司 | Polyethylene injection composition and polyethylene injection moulded products and preparation method thereof |
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| CN102134343A (en) * | 2010-12-22 | 2011-07-27 | 芜湖红方包装科技有限公司 | Plastic film formed by blow molding |
| CN102276892A (en) * | 2011-05-24 | 2011-12-14 | 华东理工大学 | Method for preparing polyethylene pipe resin |
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| WO1997018260A1 (en) * | 1995-11-15 | 1997-05-22 | Asahi Kasei Kogyo Kabushiki Kaisha | Pre-expanded polyethylene beads and process for the production thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103571011A (en) * | 2013-10-14 | 2014-02-12 | 肇庆市盛林再生资源有限公司 | HDPE (High-density polyethylene) hollow winding pipe special plastic prepared by waste polyethylene cable rubber powder |
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| CN108034104A (en) * | 2017-11-17 | 2018-05-15 | 神华集团有限责任公司 | Polyethylene injection composition and polyethylene injection moulded products and preparation method thereof |
| CN107841026A (en) * | 2017-11-29 | 2018-03-27 | 广东聚航新材料研究院有限公司 | A kind of preparation method of Controllable cross-linking polyethylene |
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