CN109955459A - A kind of device and technique of online regulation melt strength - Google Patents
A kind of device and technique of online regulation melt strength Download PDFInfo
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- CN109955459A CN109955459A CN201910009842.6A CN201910009842A CN109955459A CN 109955459 A CN109955459 A CN 109955459A CN 201910009842 A CN201910009842 A CN 201910009842A CN 109955459 A CN109955459 A CN 109955459A
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Abstract
The present invention provides the device and technique of a kind of online regulation melt strength, device includes being sequentially connected ground feed system, level-one screw extruder, connector I, dynamic mixing device, connector II, second level screw extruder, extruding dies.The present invention in polymer extrusion process by carrying out ladder temperature control to tandem extruder group, it is successfully introduced into the enhancing melt structure with partial melting crystal, realize the online regulation of melt strength, and by the setting of subsequent corresponding subsidiary engine, the production of the products such as inflation film, oriented film, extrusion-blown modling and the extrusion sheet of lower melt strength polymer is realized.
Description
Technical field
The present invention relates to extruder series connection unit design and melt strengths in polymer processing field to regulate and control online
Technique, the especially extrusion of low melt strength polymer and its related forming technique and technique.
Background technique
Extrusion molding is very important a kind of forming method in Polymer Processing, and generally usable screw-type extruder is raw
The continuously extruded products with specific cross-sectional shape are produced, extruder also serves as the host of other moulding process production lines.It is several
All thermoplastic polymers can be used to extrusion molding, but certain polymer materials such as fully biodegradable is poly- newborn
Acid be used for film production when or polypropylene be used for extrusion-blown modling or foam shaping by extrusion when, due to its when from mould melt strength compared with
Low, product molding performance and service performance are poor, greatly limit its application range.For such semicrystalline polymer material
Expect, the melt state in extrusion process is the intuitive performance of its rheological charactristics, influences whether that subsequent microstructure is drilled
Change and its product properties.For this kind of low melt strength polymer, how to regulate and control its melt strength in process is to determine
The key of final products performance.
Summary of the invention
The present invention is directed to the deficiency of existing production technology, proposes that one kind exists by the control of bonding apparatus structure design and processes
Line regulate and control melt strength device and technique, have product strong applicability, save the cost, it is environmentally protective the advantages that.
The technical solution adopted by the present invention to solve the technical problems is: a kind of dress of online regulation melt strength
It sets, it is characterised in that: including being sequentially connected ground feed system, level-one screw extruder, connector I, dynamic mixing device, connector
II, second level screw extruder, extruding dies.
It is further used as the improvement of technical solution of the present invention, and the dynamic mixing device includes: temperature control system, pressure prison
Examining system is kneaded transmission system, dynamic mixing device rotor.
It is further used as the improvement of technical solution of the present invention, and the dynamic mixing device rotor is disposed vertically in the same direction for a pair
The rotor of rotation.
It is further used as the improvement of technical solution of the present invention, is provided with feed system on the level-one screw extruder, and one
Grade screw extruder transmission mechanism, level-one screw rod.The connector I connects level-one screw extruder and dynamic mixing device.It is described
Dynamic mixing device transmission mechanism, dynamic mixing device rotor are provided on dynamic mixing device.The connector II connects dynamic mixing
Device and second level screw extruder.Single screw rod transmission mechanism, single screw rod and extruder mouth are provided on the second level screw extruder
Mould.The temperature control system is arranged in level-one screw extruder, connector I, dynamic mixing device, connector II, second level Screw Extrusion
On machine and extruding dies.
It is further used as the improvement of technical solution of the present invention, and the level-one screw extruder is single screw extrusion machine or double spiral shells
Bar extruder.The second level screw extruder is single screw extrusion machine.
It is further used as the improvement of technical solution of the present invention, and the temperature control system is recycled using Electric heating and cooling water
Mode.
It is further used as the improvement of technical solution of the present invention, and six sections of temperature controlled regions are arranged in the level-one screw extruder altogether, temperature
Spend control range: 150 ~ 180 DEG C of an area, two 180 ~ 210 DEG C of areas, three 180 ~ 210 DEG C of areas, four 180 ~ 210 DEG C of areas, five areas 170 ~
190 DEG C, six 160 ~ 185 DEG C of areas.I temperature controlling range of connector is 150 ~ 185 DEG C.The temperature control model of the dynamic mixing device
Enclose is 110 ~ 190 DEG C.II temperature controlling range of connector is 130 ~ 185 DEG C.The second level screw extruder is arranged four altogether
Section temperature controlled region, temperature controlling range: 135 ~ 190 DEG C of an area, two 145 ~ 200 DEG C of areas, three 150 ~ 200 DEG C of areas, four areas 150 ~ 200
℃.The extruding dies temperature controlling range is 150 ~ 200 DEG C.2 ~ 16MPa of pressure.
The present invention also provides a kind of techniques of online regulation melt strength, are uniformly mixed to be added raw material first and feed
Material system, raw material enter level-one screw extruder compression section by feed system and melt, and it is mixed to enter dynamic by connector I later
It refines device temperature-adjustment pressure-adjustment, enter the online regulation that second level screw extruder realizes melt strength through connector II, finally by extrusion
Machine mouth mold obtains extrudate.
It is further used as the improvement of present invention process, the temperature setting of the dynamic mixing device need to be lower than the starting knot of raw material
Brilliant temperature.It can guarantee that melt crystallizes feedstock portions under the conditions of certain degree of supercooling in this way, generating has partial melting brilliant
The enhancing melt structure of body.
It is further used as the improvement of present invention process, the second level screw extruder temperature setting need to be lower than the starting of raw material
Melting temperature.Such temperature setting can not only guarantee the structure for not destroying enhancing melt, but also raw material can be made smoothly to squeeze out.
It is further used as the improvement of present invention process, the raw material is that isotactic polypropylene or polylactic acid-based low melt strength are poly-
Close object.Additive is α nucleating agent DMDBS, nanometer calcium carbonate, nano clay, the one or more of plasticizer etc..
The present invention has following positive beneficial effect:
The device and technique of a kind of online regulation melt strength of the present invention, by level-one screw extruder and feed
Material system controls polymer melting section, and dynamic mixing device and second level screw extruder control polymer melt enhance section, extruder
Mouth mold controls extrudate shape, and each section individually regulates and controls, while coordinating mutually.
Dynamic mixing device of the present invention can be regulated and controled by temperature, guarantee polymer part under certain temperature gradient
Crystallization, and adjusted by the further temperature of second level screw extruder, introduce the enhancing melt with partial melting lamellar structure.
The rotor of dynamic mixing device of the present invention can carry out temperature to the enhancing melt with part lamellar structure
It adjusts and transports.
Only as matrix or a small amount of additive is added using a kind of polymer in the raw materials used in the present invention, and extruded product can carry out secondary
It recycles, it is environmentally protective.
The present invention can expand the polymer such as polypropylene and polylactic acid of low melt strength in extrusion-blown modling, squeeze out and stretch, squeeze
The application of inflation film and extrusion foaming etc. out.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of the device of online regulation melt strength of the present invention；
Fig. 2 is the left view of dynamic mixing device rotor of the present invention；
Fig. 3 is the front view of dynamic mixing device rotor of the present invention；
The meaning that symbol indicates in figure are as follows: 1-level-one screw extruder, 2-level-one screw extruder transmission mechanisms, 3-feedings
System, 4-temperature control systems, 5-level-one screw rods, 6-connectors I, 7-dynamic mixing devices, 8-dynamic mixing device transmission mechanisms,
9-dynamic mixing device rotors, 10-connectors II, 11-second level screw extruders, 12-single screw rod transmission mechanisms, 13-mono- spiral shells
Bar, 14-extruding dies.
Specific embodiment
Embodiment 1
Referring to Fig.1, shown in Fig. 2, Fig. 3, a kind of device of online regulation melt strength, device includes being sequentially connected ground
Feed system 3, level-one screw extruder 1, connector I 6, dynamic mixing device 7, connector II 10, second level screw extruder 11 squeeze
Machine outlet mould 14.
The dynamic mixing device includes: temperature control system, and pressure monitor system is kneaded transmission system, dynamic mixing device
Rotor.
The dynamic mixing device rotor is the rotor of a pair of rotating Vortex being disposed vertically.
Feed system 3, level-one screw extruder transmission mechanism 2, level-one screw rod are provided on the level-one screw extruder 1
5.The connector I 6 connects level-one screw extruder 1 and dynamic mixing device 7.It is mixed that dynamic is provided on the dynamic mixing device 7
Refine device transmission mechanism 8, dynamic mixing device rotor 9.The connector II 10 connects dynamic mixing device 7 and second level screw extruder
11.Single screw rod transmission mechanism 12, single screw rod 13 and extruding dies 14 are provided on the second level screw extruder 11.The temperature
Control system 4 is arranged in level-one screw extruder 1, connector I 6, dynamic mixing device 7, connector II 10, second level screw extruder 11
And on extruding dies 14.
The level-one screw extruder 1 selects double screw extruder, and the second level screw extruder 11 selects single screw rod to squeeze
Machine out.
The temperature control system 4 is using Electric heating and cooling water-cycling mode.
At work, by isotactic polypropylene 99.3%, α nucleating agent DMDBS0.5%, Nano-meter CaCO330.2% uses high-speed mixer
Feed system 3 is added in mixing 3 ~ 5 minutes, passes through double screw extruder, connector I 6, dynamic mixing device 7, connector II 10, list
After screw extruder, squeezed out through extruding dies 14.
The double screw extruder technological temperature: 160 DEG C of an area, two 175 DEG C of areas, three 180 DEG C of areas, four 190 DEG C of areas, 5th area
190 DEG C, six 175 DEG C of areas.I 6 technological temperature of connector: 160 DEG C.7 technological temperature of dynamic mixing device: 130 DEG C.It is described
II 10 technological temperature of connector: 145 DEG C.The single screw extrusion machine technological temperature: 150 DEG C of an area, two 155 DEG C of areas, three areas 160
DEG C, four 165 DEG C of areas.14 technological temperature of extruding dies: 168 DEG C.
Embodiment 2
The part function having the same identical with embodiment 1 of embodiment 2, for simplicity no longer repeating.
Embodiment 2 is with embodiment 1 the difference is that the difference of its technique: at work, by isotactic polypropylene
99.0%, α nucleating agent DMDBS0.8%, compatilizer 0.2% are mixed 3 ~ 5 minutes with high-speed mixer, feed system 3 are added, by double
After screw extruder, connector I 6, dynamic mixing device 7, connector II 10, single screw extrusion machine, squeezed out through extruding dies 14.
The double screw extruder technological temperature: 160 DEG C of an area, two 175 DEG C of areas, three 180 DEG C of areas, four 190 DEG C of areas, 5th area
190 DEG C, six 180 DEG C of areas.I 6 technological temperature of connector: 165 DEG C.7 technological temperature of dynamic mixing device: 135 DEG C.It is described
II 10 technological temperature of connector: 150 DEG C.The single screw extrusion machine technological temperature: 150 DEG C of an area, two 150 DEG C of areas, three areas 160
DEG C, four 165 DEG C of areas.14 technological temperature of extruding dies: 168 DEG C.
Certainly, the invention is not limited to above embodiment, and those skilled in the art are without prejudice to originally
Equivalent deformation or replacement can be also made under the premise of spirit, these equivalent deformations or replacement are all contained in the application right
It is required that in limited range.
Claims (11)
1. a kind of device of online regulation melt strength, it is characterised in that: including being sequentially connected ground feed system, level-one
Screw extruder, connector I, dynamic mixing device, connector II, second level screw extruder, extruding dies.
2. a kind of device of online regulation melt strength according to claim 1, it is characterised in that: the dynamic
Milling device includes: temperature control system, and pressure monitor system is kneaded transmission system, dynamic mixing device rotor.
3. a kind of device of online regulation melt strength according to claim 2, it is characterised in that: the dynamic
Milling device rotor is the rotor of a pair of rotating Vortex being disposed vertically.
4. a kind of device of online regulation melt strength according to claim 1, it is characterised in that: the level-one
Feed system, level-one screw extruder transmission mechanism, level-one screw rod, the connection of connector I one are provided on screw extruder
Grade screw extruder and dynamic mixing device is provided with dynamic mixing device transmission mechanism, dynamic mixing device on the dynamic mixing device
Rotor, the connector II connect dynamic mixing device and second level screw extruder, are provided with list on the second level screw extruder
Screw drive mechanism, single screw rod and extruding dies, the temperature control system setting is in level-one screw extruder, connector I, dynamic
Milling device, connector II, on second level screw extruder and extruding dies.
5. a kind of device of online regulation melt strength according to claim 1, it is characterised in that: the level-one
Screw extruder is single screw extrusion machine or double screw extruder, and the second level screw extruder is single screw extrusion machine.
6. regulating and controlling the device of melt strength online according to one kind described in claim 4 any one, it is characterised in that:
The temperature control system is using Electric heating and cooling water-cycling mode.
7. a kind of device of online regulation melt strength according to claim 1, it is characterised in that: the level-one
Six sections of temperature controlled regions are arranged in screw extruder altogether, temperature controlling range: 150 ~ 180 DEG C of an area, two 180 ~ 210 DEG C of areas, and three areas 180 ~
210 DEG C, four 180 ~ 210 DEG C of areas, five 170 ~ 190 DEG C of areas, six 160 ~ 185 DEG C of areas, I temperature controlling range of connector be 150 ~
185 DEG C, the temperature-control range of the dynamic mixing device is 110 ~ 190 DEG C, and II temperature controlling range of connector is 130 ~ 185
DEG C, four sections of temperature controlled regions are arranged in the second level screw extruder altogether, temperature controlling range: 135 ~ 190 DEG C of an area, two areas 145 ~ 200
DEG C, three 150 ~ 200 DEG C of areas, four 150 ~ 200 DEG C of areas, the extruding dies temperature controlling range is 150 ~ 200 DEG C, pressure 2 ~
16MPa。
8. a kind of technique of online regulation melt strength, is suitable for device described in claim 1 ~ 7 any one,
It is characterized in that: raw material being uniformly mixed feed system is added first, raw material enters level-one screw extruder pressure by feed system
The melting of contracting section enters dynamic mixing device temperature-adjustment pressure-adjustment by connector I later, exists through connector II into second level screw extruder
Line regulates and controls melt strength, obtains extrudate finally by extruding dies.
9. a kind of technique of online regulation melt strength according to claim 8, it is characterised in that: the dynamic
The temperature setting of milling device need to be lower than the crystallization initiation temperature of raw material.
10. a kind of technique of online regulation melt strength according to claim 8, it is characterised in that: described two
The temperature setting of grade screw extruder need to be lower than the onset melting temperature of raw material.
11. a kind of technique of online regulation melt strength according to claim 8, it is characterised in that: the original
Material is isotactic polypropylene or polylactic acid-based low melt strength polymer, and additive is α nucleating agent DMDBS, nanometer calcium carbonate, nanometer
Clay, the one or more of plasticizer etc..
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910009842.6A CN109955459A (en) | 2019-01-05 | 2019-01-05 | A kind of device and technique of online regulation melt strength |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910009842.6A CN109955459A (en) | 2019-01-05 | 2019-01-05 | A kind of device and technique of online regulation melt strength |
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| Publication Number | Publication Date |
|---|---|
| CN109955459A true CN109955459A (en) | 2019-07-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910009842.6A Pending CN109955459A (en) | 2019-01-05 | 2019-01-05 | A kind of device and technique of online regulation melt strength |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114605849A (en) * | 2022-03-24 | 2022-06-10 | 华南农业大学 | Manufacturing method of wood-plastic granules and composite material with ultrahigh wood fiber content |
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| JPH09239726A (en) * | 1996-03-12 | 1997-09-16 | Mitsubishi Chem Corp | Tandem type kneading apparatus and kneading of thermoplastic resin and/or rubber using the same |
| JP2004082484A (en) * | 2002-08-26 | 2004-03-18 | Sekisui Plastics Co Ltd | Method for manufacturing polypropylene resin foam |
| JP2007276321A (en) * | 2006-04-10 | 2007-10-25 | Japan Steel Works Ltd:The | Tandem type extrusion foaming molding process |
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| CN204844803U (en) * | 2015-07-10 | 2015-12-09 | 珠海市金塑塑料有限公司 | Serial -type third -order on single screw extruder group |
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2019
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Patent Citations (5)
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|---|---|---|---|---|
| JPH09239726A (en) * | 1996-03-12 | 1997-09-16 | Mitsubishi Chem Corp | Tandem type kneading apparatus and kneading of thermoplastic resin and/or rubber using the same |
| JP2004082484A (en) * | 2002-08-26 | 2004-03-18 | Sekisui Plastics Co Ltd | Method for manufacturing polypropylene resin foam |
| JP2007276321A (en) * | 2006-04-10 | 2007-10-25 | Japan Steel Works Ltd:The | Tandem type extrusion foaming molding process |
| CN102190832A (en) * | 2010-03-12 | 2011-09-21 | 青岛科技大学 | Poly-1-butene elastomer material and preparation method thereof |
| CN204844803U (en) * | 2015-07-10 | 2015-12-09 | 珠海市金塑塑料有限公司 | Serial -type third -order on single screw extruder group |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114605849A (en) * | 2022-03-24 | 2022-06-10 | 华南农业大学 | Manufacturing method of wood-plastic granules and composite material with ultrahigh wood fiber content |
| CN114605849B (en) * | 2022-03-24 | 2022-11-11 | 华南农业大学 | Manufacturing method of wood-plastic granules and composite material with ultrahigh wood fiber content |
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