CN101298183A - Preparation process of three-layer plastic coextrusion-lamination film - Google Patents
Preparation process of three-layer plastic coextrusion-lamination film Download PDFInfo
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- CN101298183A CN101298183A CNA2008100291497A CN200810029149A CN101298183A CN 101298183 A CN101298183 A CN 101298183A CN A2008100291497 A CNA2008100291497 A CN A2008100291497A CN 200810029149 A CN200810029149 A CN 200810029149A CN 101298183 A CN101298183 A CN 101298183A
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- film
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- layer plastic
- extruder
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- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 229920003023 plastic Polymers 0.000 title claims abstract description 16
- 239000004033 plastic Substances 0.000 title claims abstract description 16
- 238000003475 lamination Methods 0.000 title claims description 11
- 238000000034 method Methods 0.000 claims abstract description 22
- 238000001125 extrusion Methods 0.000 claims abstract description 14
- 238000005516 engineering process Methods 0.000 claims abstract description 13
- 238000003851 corona treatment Methods 0.000 claims abstract description 7
- 238000001816 cooling Methods 0.000 claims abstract description 6
- 239000010408 film Substances 0.000 claims description 47
- 229920001903 high density polyethylene Polymers 0.000 claims description 9
- 239000004700 high-density polyethylene Substances 0.000 claims description 9
- 229920000092 linear low density polyethylene Polymers 0.000 claims description 9
- 239000004707 linear low-density polyethylene Substances 0.000 claims description 9
- 239000010409 thin film Substances 0.000 claims description 8
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 5
- 230000006835 compression Effects 0.000 claims description 5
- 238000007906 compression Methods 0.000 claims description 5
- 229920001684 low density polyethylene Polymers 0.000 claims description 5
- 239000004702 low-density polyethylene Substances 0.000 claims description 5
- 229920000426 Microplastic Polymers 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 238000005096 rolling process Methods 0.000 claims description 4
- 239000008188 pellet Substances 0.000 claims description 3
- 239000002131 composite material Substances 0.000 abstract description 10
- 239000000463 material Substances 0.000 abstract description 9
- 230000004888 barrier function Effects 0.000 abstract description 5
- 239000003086 colorant Substances 0.000 abstract description 4
- 238000010438 heat treatment Methods 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 19
- 238000007639 printing Methods 0.000 description 4
- 229920001526 metallocene linear low density polyethylene Polymers 0.000 description 3
- -1 polyethylene Polymers 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 210000002469 basement membrane Anatomy 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 229920010126 Linear Low Density Polyethylene (LLDPE) Polymers 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
Landscapes
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a preparation technology of three-layer plastic co-extrusion composite film, comprising the preparation steps as follows: (1) pre-heating process; (2) material falling process; (3) the starting of an upper traction device; (4) cooling process; (5) extruding process; (6) the starting of a lower traction device; (7) the adjusting of the size specification of the film; (8) roll-up process: carrying out the roll-up operation by utilizing a roll-up machine; (9) corona treatment process: starting an electric corona machine to carry out the corona treatment. The three-layer plastic co-extrusion composite film prepared by the preparation technology has high strength and good barrier property and air-tightness; meanwhile, different colours can be adopted, and the shading property and the fresh-keeping capability of the film are effectively improved.
Description
Technical field
The present invention relates to the plastic coextrusion-lamination film technical field, particularly a kind of preparation technology of the film plastic pocket of forming by three-layer coextru-laminated film.
Background technology
In the prior art, the application of plastic sheeting is increasingly extensive, normally, extrude the formation single thin film by the individual layer head, but this single thin film is generally only used an extruder in manufacturing process with different materials such as high and low pressure polyethylene, linear low density polyethylene (LLDPE) and EVA, and in extruder, only used homogenous material, the single thin film of producing like this, physical property is poor, and intensity is lower, barrier and air-tightness are all relatively poor, do not have shading performance preferably and fresh keeping property simultaneously again.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of preparation technology of three-layer plastic coextrusion-lamination film is provided, the three-layer co-extruded composite plastic film intensity height of preparing by this preparation technology, but also have good barrier, air-tightness and bearing strength, simultaneously can also adopt different colors, improve the shading performance and the preservativity of film effectively.Same and the individual layer of three-layer co-extruded material relatively, the thin 10%-20% of comparable general monolayer material and reach the low effect that reaches environmental protection of cost.
In order to realize above-mentioned technical purpose, the present invention realizes by following technical scheme:
A kind of preparation technology of three-layer plastic coextrusion-lamination film, its preparation process is:
(1) warm: with die head, homogenizing zone, compression section and the feeding section difference preheating regular hour of three extruder extrusion screw rods;
(2) blanking process: the pellet in the hopper of three splendid attire plastic granules is joined three extruders respectively accordingly be extruded into screw rod and die head;
(3) draw-gear in the unlatching: draw-gear is to be used for the handle thin films pipe on this;
(4) cooling procedure: cool off by cooling blower;
(5) extrusion: start each extruder and realize extruding the coextrusion composite film process;
(6) open lower traction equipment: the film that extruder is extruded transfers out by lower traction equipment;
(7) dimensions of adjusting film: the dimensions of this film can be by regulating air inflow, transfer the main frame extrusion capacity or transferring hauling speed regulate;
(8) wrapup procedure: utilize winder to carry out rolling;
(9) sided corona treatment process: can improve the surface tension value of film effectively by this sided corona treatment process, to improve the attachment fastness and the surface property of laminated film.
In above-mentioned steps (1), be preheating time: be preheating time: earlier with the die head preheating of extruder extrusion screw rod 60 minutes～90 minutes; Then with every main frame homogenizing zone preheating 40～60 minutes; Then with compression section preheating 40～50 minutes; At last with feeding section preheating 25～35 minutes.
The composition of material can be chosen one wantonly in three hoppers from following proportioning in above-mentioned steps (2): LLDPE 83%+LDPE 17%; HDPE 50%+LDPE50% (or LLDPE50%); HDPE70%+LLDPE30%; MLLDPE30%+LLDPE20%+HDPE50%; MLLDPE20%+LLDPE30%+HDPE50%; LDPE35%+HDPE65%; HDPE70%+MLLDPE30%; HDPE65%+LLDPE35%; LLDPE50%+LDPE50%; PP100%.
Certainly, more than three extruders can each use above prescription, in fact can also formulate according to requirement of client, each component ratio deal can increase or reduce in every kind of proportioning, the consumption of material can change in each hopper, usually main materials are blown film level high and low pressure polyethylene, polypropylene etc., but also can determine used extrusion screw rod according to material therefor.
Compared with prior art, the invention has the beneficial effects as follows:
(1) the present invention extrudes three-layer coextru-laminated film by the composite machine head that uses three extruders, has improved the thin film physics performance greatly, has increased intensity, makes film have good barrier and air-tightness, improves its heat sealability and printing performance simultaneously;
(2) coextrusion composite film good evenness of the present invention, rolling is smooth, can be widely used in liquid film pearly-lustre film, compound basement membrane etc., satisfies the needs of new agricultural and high request packing;
(3) in three of coextrusion composite film of the present invention layers every layer all can adopt different colours, thereby improve the shading performance and the preservativity of film effectively.
(4) three-layer coextru-laminated film of the present invention intensity and contain loading capability no matter, all be better than single thin film, therefore three-layer coextru-laminated film can lower thickness, and reach reduce cost, the purpose of environmental protection, and satisfy the target of the handbag pack of all types of handbags and paper for daily use.
Description of drawings
Below in conjunction with the drawings and specific embodiments the present invention is described in detail:
Fig. 1 is preparation technology's flow chart of three-layer plastic coextrusion-lamination film of the present invention.
The specific embodiment
As shown in Figure 1, the preparation technology of three-layer plastic coextrusion-lamination film of the present invention, its preparation process is:
(1) warm: open three electric heating extruders, to the even preheating of head fuselage of every extruder, be preheating time: earlier with extruder die head preheating 60 minutes～90 minutes; Then with each extruder homogenizing zone preheating 40～60 minutes; Then with compression section preheating 40～50 minutes; At last with feeding section preheating 25～35 minutes.Treat that the each several part temperature is higher than temperature required 5～10 degree of production, can make fully heating and melting of plastic pellet this moment.
(2) blanking process: three extruders with can extrude pellet than the jogging speed start, and check that instrument such as screw rod current of electric pressure has and do not exceed the load phenomenon.In the hopper of every extruder, add a small amount of plastic pellet, when treating the plastic extrusion die mouth, can progressively press different needs and transfer the main frame speed of three extruders fast.The composition of plastics can be chosen one wantonly in each hopper from following composition: LLDPE 83%+LDPE17%; HDPE 50%+LDPE 50% (or LLDPE 50%), HDPE 70%+LLDPE 30%; MLLDPE 30%+LLDPE 20%+HDPE 50%; MLLDPE 20%+LLDPE 30%+HDPE 50%; LDPE 35%+HDPE 65%; HDPE 70%+MLLDPE 30%; HDPE 65%+LLDPE 35%; LLDPE 50%+LDPE 50%; PP100%.
(3) draw-gear in the unlatching is guided to the film pipe on the draw-gear.
(4) cooling procedure: the air quantity of aligning cooling vane simultaneously cools off, and adds an amount of air, makes film be expanded to needed specification.
(5) extrusion: start each extruder and realize that each layer film carries out the coextru-lamination process at composite machine head;
(6) open lower traction equipment: the film that extruder is extruded transfers out by lower traction equipment;
(7) dimensions of adjusting film: the dimensions of this film can be by regulating air inflow, transfer the main frame extrusion capacity or transferring hauling speed regulate;
(8) wrapup procedure: start wrap-up with film take-up, and measure thick dark thinly, can adjust main frame or go up traction and reach and cause needed thickness.
(9) sided corona treatment process: after product concocted lattice, if corona machine is opened when needing printing, whether spark impacted and reaches 38 dyne, and up to standard with tests such as corona tests.Can improve the surface tension value of film effectively by this sided corona treatment process, improving the attachment fastness and the surface property of laminated film, thereby reach the purpose of printing nondiscoloration.
The three-layer coextru-laminated film that the present invention extrudes by extruder head has improved the thin film physics performance, has increased intensity, makes film have good barrier and air-tightness, improves its heat sealability and printing performance simultaneously; This coextrusion composite film good evenness, rolling is smooth, can be widely used in liquid film pearly-lustre film, compound basement membrane etc., satisfies the needs of new agricultural and high request packing; Each layer in three layers of the coextrusion composite films all can adopt different colours, makes laminated film have good shading performance and preservativity.
Claims (3)
1. the preparation technology of a three-layer plastic coextrusion-lamination film is characterized in that, its preparation process is:
(1) warm: with die head, homogenizing zone, compression section and the feeding section difference preheating regular hour of three extruder extrusion screw rods;
(2) blanking process: the pellet in the hopper of three splendid attire plastic granules is joined three extruders respectively accordingly be expressed into screw rod and die head.
(3) draw-gear in the unlatching: draw-gear is to be used for the handle thin films pipe on this;
(4) cooling procedure;
(5) extrusion: start each extruder and realize the extrusion film process;
(6) open lower traction equipment: the film that extruder is extruded transfers out by lower traction equipment;
(7) dimensions of adjustment film;
(8) wrapup procedure: utilize winder to carry out rolling;
(9) sided corona treatment process.
2. the preparation technology of three-layer plastic coextrusion-lamination film according to claim 1 is characterized in that, in the above-mentioned steps (1), be preheating time: earlier with the die head preheating of each extruder extrusion screw rod 60 minutes～90 minutes; Then with every main frame homogenizing zone preheating 40～60 minutes; Then with compression section preheating 40～50 minutes; At last with feeding section preheating 25～35 minutes.
3. the preparation technology of three-layer plastic coextrusion-lamination film according to claim 1, it is characterized in that, in the above-mentioned steps (2) in three hoppers the composition of blank can be respectively from following proportioning optional one, each possible proportioning is: LLDPE 83%+LDPE 17%; HDPE 50%+LDPE50% (or LDDPE50%); HDPE70%+LLDPE30%; MLLDPE30%+LLDPE20%+HDPE50%; MLLDPE20%+LLDPE30%+HDPE50%; LDPE35%+HDPE65%; HDPE70%+MLLDPE30%; HDPE65%+LLDPE35%; LLDPE50%+LDPE50%; PP100%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100291497A CN101298183A (en) | 2008-07-02 | 2008-07-02 | Preparation process of three-layer plastic coextrusion-lamination film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100291497A CN101298183A (en) | 2008-07-02 | 2008-07-02 | Preparation process of three-layer plastic coextrusion-lamination film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101298183A true CN101298183A (en) | 2008-11-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100291497A Pending CN101298183A (en) | 2008-07-02 | 2008-07-02 | Preparation process of three-layer plastic coextrusion-lamination film |
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| Country | Link |
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| CN (1) | CN101298183A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102490366A (en) * | 2011-12-03 | 2012-06-13 | 大连塑料研究所有限公司 | Process and equipment for continuously producing and molding dual-extrusion current coating plastic clip net film products |
| CN103692645A (en) * | 2013-12-06 | 2014-04-02 | 广东天元印刷有限公司 | Membrane blowing technology and membrane |
| CN104708839A (en) * | 2013-12-12 | 2015-06-17 | 南宁市磁汇科技有限公司 | Manufacturing method and equipment for prefabricated polyethylene foamed heat-insulating pipe |
| CN105246667A (en) * | 2013-03-20 | 2016-01-13 | 阿尔温莱纳股份有限两合公司阿尔普拉工厂 | Extrusion Blow Molded Tubing |
| CN111805951A (en) * | 2020-08-04 | 2020-10-23 | 乐荟文具南通有限公司 | Processing technology of file pocket |
-
2008
- 2008-07-02 CN CNA2008100291497A patent/CN101298183A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102490366A (en) * | 2011-12-03 | 2012-06-13 | 大连塑料研究所有限公司 | Process and equipment for continuously producing and molding dual-extrusion current coating plastic clip net film products |
| CN105246667A (en) * | 2013-03-20 | 2016-01-13 | 阿尔温莱纳股份有限两合公司阿尔普拉工厂 | Extrusion Blow Molded Tubing |
| CN103692645A (en) * | 2013-12-06 | 2014-04-02 | 广东天元印刷有限公司 | Membrane blowing technology and membrane |
| CN104708839A (en) * | 2013-12-12 | 2015-06-17 | 南宁市磁汇科技有限公司 | Manufacturing method and equipment for prefabricated polyethylene foamed heat-insulating pipe |
| CN111805951A (en) * | 2020-08-04 | 2020-10-23 | 乐荟文具南通有限公司 | Processing technology of file pocket |
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Open date: 20081105 |