CN103963306A - Production system for supercritical gas PP physical foaming sheet - Google Patents
Production system for supercritical gas PP physical foaming sheet Download PDFInfo
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- CN103963306A CN103963306A CN201310338567.5A CN201310338567A CN103963306A CN 103963306 A CN103963306 A CN 103963306A CN 201310338567 A CN201310338567 A CN 201310338567A CN 103963306 A CN103963306 A CN 103963306A
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Abstract
The invention relates to the field of plastic foaming, and especially relates to a production system for a supercritical gas PP physical foaming sheet. The production system is characterized in that the system comprises a hopper, extrusion equipment, press-polish equipment, cooling equipment, a shaping device and a fixing device which are in successive connection, and the extrusion equipment is also connected with gas injection equipment. The production system is simple in structure, and the prepared foaming sheet has the advantages of being high in foaming ratio, high in heat-insulation performance, good in mechanical strength, energy-saving, environment-friendly, degradable, recoverable, reusable, low in raw material cost, resistant to heat, resistant to moisture, resistant to compression, resistant to deformation, good in sound-insulation performance, and the like.
Description
Technical field
The present invention relates to plastic foamed field, relate in particular to a kind of production system of supercritical gas PP physical blowing sheet material.
Background technology
In the processing industry of plastic products; people are seeking to adapt to the new method of modern processing always; thereby reach the object that saves time, increases benefit protection of the environment, so the research and development utilization of plastic products is also just towards the higher future development of environmental protection, safety, light weight and cost performance.Polypropylene (PP) foaming plate grows up just under these circumstances, is the focus of domestic novel plastic expanded material research and development aspect in recent years always.PP foaming plate has that quality is light, cost is low, intensity is high, sound insulation, can absorb the advantages such as a large amount of impact energys, is widely used in the materials such as packaging, transport, automobile, insulation, building.Along with the raising of government's improvement " white pollution " dynamics, PS expanded material can progressively be withdrawn from the market, and the chemical constitution of PP determines that its degradation property is better than PE and PS, good heat resistance, the excellent special performance such as shock-absorbing capacity and easy degraded are developed rapidly PP foaming plate at home and abroad.
Polyacrylic foaming technique difficulty is more much larger than PE, PS.The temperature that polypropylene is applicable to foaming is 4 DEG C, near processing temperature, melt strength (performance of melt stretch-proof) and the non-constant of elasticity of PP, when temperature rises to after melt temperature, the melt of PP sharply declines by force, lower melt strength cannot ensure the effect of the tensile stress that in bubble growth process, cell wall is born, cause Bubble formation to cave in and break, to such an extent as to the percent opening of PP foam is very high, cannot meet instructions for use, therefore improve polyacrylic expandable, just and must improve polyacrylic melt strength.
Melt strength refers to the intensity of the weight of polymer melt energy support own, has reflected the ability of melt resistance bubble stretching and shearing.Its influence factor comprises the elastic recovery characteristic of molecular structure, melt viscosity, molten hang down time, surface tension, melt etc.
Increase the following three kinds of methods of the general employing of melt strength at present both at home and abroad:
The first, is used the high body intensity polypropylene HMSPP that melts, and adopts new catalyst and reactor technology, its molecular mass is distributed and widen or branched p 0 lypropylene increase melt strength.It is very high that shortcoming is that height melts strong polyacrylic cost, is unfavorable for extensive use;
The second, polypropylene is partial cross-linked, uses chemical cross-linking agent by partial cross-linked polypropylene increase melt strength.Shortcoming is the control difficulty of the degree of cross linking, and the existence of gel has affected recycling, and has chemical residual, cannot bring into play the advantage performance of PP, and technique is difficult to be controlled, and easily blasts;
The third, polypropylene carries out blending and modifying, increases melt strength by carrying out blend with other PE or easy expanded material material.Shortcoming is to reduce mechanical property and the resistance to elevated temperatures of PP expanded material, makes foamed plastics lose due advantage, cannot utilize its advantage.
Summary of the invention
The object of the present invention is to provide a kind of production system of supercritical gas PP physical blowing sheet material, solve the defect that prior art exists.
In order to realize above-mentioned object, adopt following technical scheme: a kind of production system of supercritical gas PP physical blowing sheet material, described system comprises the hopper, extrusion equipment, press polish equipment, cooling device, shaped device and the shaping equipment that connect successively, and described extrusion equipment also connects gas injection equipment.
In such scheme, described extrusion equipment is double screw extruder or single screw extrusion machine.Further, described extrusion equipment is that double screw extruder is connected with single screw extrusion machine.Described gas injection equipment output supercritical carbon dioxide enters in extrusion equipment.Described shaping equipment is sizing mouthful mould.
Compared with prior art, the present invention is simple in structure, the advantage such as the foaming plate making has that expansion ratio is high, heat-proof quality is high, mechanical strength is good, energy-conserving and environment-protective, the recyclable recycling of degradable, cost of material is low, heatproof is moisture resistance, resistance to compression resistance to deformation, sound insulation value are good.
Brief description of the drawings
Fig. 1 is the structural representation of native system.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described.
The structure of native system as shown in Figure 1, comprises the hopper, extrusion equipment, press polish equipment, cooling device, shaped device and the shaping equipment that connect successively, and described extrusion equipment also connects gas injection equipment.Extrusion equipment adopts double screw extruder to connect with single screw extrusion machine, and double screw extruder connects hopper, and single screw extrusion machine connects press polish equipment, and gas injection equipment output supercritical carbon dioxide enters in extrusion equipment.Material is added by hopper, by conveying and the melting of screw rod, the gas that source of the gas is supplied with is conveyed in extruder continuously and stably by measuring pump, by melt extruding of twin-screw, the abundant mixed melting of Series Sheet screw extruder, accelerating gas is fully dissolved in polymer melt, homogeneous phase solution with fused materials formation polymer melt/gas, then pass through reduction of blood pressure in high-speed, make melt pressure fast-descending, in melt, dissolved gases reaches oversaturated labile state, moment forms a large amount of small nuclei of bubbles, then abscess is grown up, the melt that contains a large amount of bubbles flows into shaped device moulding stable and curing at sizing mouthful mould, obtain foaming plate.
Claims (5)
1. a production system for supercritical gas PP physical blowing sheet material, is characterized in that, described system comprises the hopper, extrusion equipment, press polish equipment, cooling device, shaped device and the shaping equipment that connect successively, and described extrusion equipment also connects gas injection equipment.
2. production system according to claim 1, is characterized in that, described extrusion equipment is double screw extruder or single screw extrusion machine.
3. production system according to claim 1, is characterized in that, described extrusion equipment is that double screw extruder is connected with single screw extrusion machine.
4. production system according to claim 1, is characterized in that, described gas injection equipment output supercritical carbon dioxide enters in extrusion equipment.
5. production system according to claim 1, is characterized in that, described shaping equipment is sizing mouthful mould.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310338567.5A CN103963306A (en) | 2013-08-06 | 2013-08-06 | Production system for supercritical gas PP physical foaming sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310338567.5A CN103963306A (en) | 2013-08-06 | 2013-08-06 | Production system for supercritical gas PP physical foaming sheet |
Publications (1)
| Publication Number | Publication Date |
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| CN103963306A true CN103963306A (en) | 2014-08-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310338567.5A Pending CN103963306A (en) | 2013-08-06 | 2013-08-06 | Production system for supercritical gas PP physical foaming sheet |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105328915A (en) * | 2015-11-11 | 2016-02-17 | 烟台恒美塑业有限公司 | Production equipment of cross-linked polyolefin microcellular foaming plate |
| CN105330883A (en) * | 2015-11-11 | 2016-02-17 | 烟台恒美塑业有限公司 | Production method of cross-linked polyolefin micro-pore foamed board and mixing and cooling device of production method |
| CN107189213A (en) * | 2017-06-29 | 2017-09-22 | 义乌市中科院兰州化物所功能材料中心 | A kind of natural aromatic type expanded material and preparation method |
| CN107972297A (en) * | 2017-11-29 | 2018-05-01 | 湖南吉永盛汽车零部件有限公司 | A kind of continuous preparation method of high power polypropylene foamed plate |
| CN109624347A (en) * | 2018-10-24 | 2019-04-16 | 佛山市高明科力机械有限公司 | The production line and production technology of the three-layer co-extruded fretting map cutlery box product of supercritical carbon dioxide physical blowing polypropylene |
-
2013
- 2013-08-06 CN CN201310338567.5A patent/CN103963306A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105328915A (en) * | 2015-11-11 | 2016-02-17 | 烟台恒美塑业有限公司 | Production equipment of cross-linked polyolefin microcellular foaming plate |
| CN105330883A (en) * | 2015-11-11 | 2016-02-17 | 烟台恒美塑业有限公司 | Production method of cross-linked polyolefin micro-pore foamed board and mixing and cooling device of production method |
| CN105330883B (en) * | 2015-11-11 | 2018-01-12 | 烟台恒美塑业有限公司 | The production method and its combination cooling device of a kind of cross-linked polyolefin microporous foam sheet material |
| CN107189213A (en) * | 2017-06-29 | 2017-09-22 | 义乌市中科院兰州化物所功能材料中心 | A kind of natural aromatic type expanded material and preparation method |
| CN107189213B (en) * | 2017-06-29 | 2020-06-12 | 义乌市中科院兰州化物所功能材料中心 | Natural aromatic foaming material and preparation method thereof |
| CN107972297A (en) * | 2017-11-29 | 2018-05-01 | 湖南吉永盛汽车零部件有限公司 | A kind of continuous preparation method of high power polypropylene foamed plate |
| CN109624347A (en) * | 2018-10-24 | 2019-04-16 | 佛山市高明科力机械有限公司 | The production line and production technology of the three-layer co-extruded fretting map cutlery box product of supercritical carbon dioxide physical blowing polypropylene |
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140806 |
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| WD01 | Invention patent application deemed withdrawn after publication |