CN103879112B - Plastic compound flexible packaging polyethylene film and blow moiding method thereof - Google Patents
Plastic compound flexible packaging polyethylene film and blow moiding method thereof Download PDFInfo
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- CN103879112B CN103879112B CN201410067899.9A CN201410067899A CN103879112B CN 103879112 B CN103879112 B CN 103879112B CN 201410067899 A CN201410067899 A CN 201410067899A CN 103879112 B CN103879112 B CN 103879112B
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- 239000004698 Polyethylene Substances 0.000 title claims abstract description 32
- -1 polyethylene Polymers 0.000 title claims abstract description 32
- 229920000573 polyethylene Polymers 0.000 title claims abstract description 32
- 150000001875 compounds Chemical class 0.000 title claims abstract description 13
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000009459 flexible packaging Methods 0.000 title claims abstract description 11
- 229920003023 plastic Polymers 0.000 title claims abstract description 11
- 239000004033 plastic Substances 0.000 title claims abstract description 11
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 51
- 239000002994 raw material Substances 0.000 claims abstract description 41
- 239000010408 film Substances 0.000 claims description 38
- 229920013716 polyethylene resin Polymers 0.000 claims description 4
- 239000010409 thin film Substances 0.000 claims description 4
- 238000007664 blowing Methods 0.000 claims description 2
- 238000003851 corona treatment Methods 0.000 claims description 2
- 238000005096 rolling process Methods 0.000 claims description 2
- 238000007493 shaping process Methods 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims description 2
- 239000012528 membrane Substances 0.000 description 6
- 238000004806 packaging method and process Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 239000002131 composite material Substances 0.000 description 3
- 229920001684 low density polyethylene Polymers 0.000 description 3
- 239000004702 low-density polyethylene Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000009835 boiling Methods 0.000 description 2
- 229920001526 metallocene linear low density polyethylene Polymers 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000010813 municipal solid waste Substances 0.000 description 2
- FATBGEAMYMYZAF-KTKRTIGZSA-N oleamide Chemical group CCCCCCCC\C=C/CCCCCCCC(N)=O FATBGEAMYMYZAF-KTKRTIGZSA-N 0.000 description 2
- FATBGEAMYMYZAF-UHFFFAOYSA-N oleicacidamide-heptaglycolether Natural products CCCCCCCCC=CCCCCCCCC(N)=O FATBGEAMYMYZAF-UHFFFAOYSA-N 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000001954 sterilising effect Effects 0.000 description 2
- 238000004659 sterilization and disinfection Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- MEYZYGMYMLNUHJ-UHFFFAOYSA-N tunicamycin Natural products CC(C)CCCCCCCCCC=CC(=O)NC1C(O)C(O)C(CC(O)C2OC(C(O)C2O)N3C=CC(=O)NC3=O)OC1OC4OC(CO)C(O)C(O)C4NC(=O)C MEYZYGMYMLNUHJ-UHFFFAOYSA-N 0.000 description 2
- 229920010126 Linear Low Density Polyethylene (LLDPE) Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000071 blow moulding Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229920000092 linear low density polyethylene Polymers 0.000 description 1
- 239000004707 linear low-density polyethylene Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
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- Laminated Bodies (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a kind of plastic compound flexible packaging polyethylene film and technique thereof, the formula of polyethylene film is: the raw material that internal layer contains and percentage by weight thereof are LDPE5% ~ 60%, LLDPE15% ~ 70%, mLLDPE10% ~ 30%, smooth opening agent 0.1% ~ 0.5%, releasing agent 0.3% ~ 0.5%; The raw material in middle level and weight percent thereof are LDPE5% ~ 60%, LLDPE15% ~ 70%; MLLDPE0 ~ 30%, releasing agent 0.3% ~ 0.5%; Outer field raw material and percentage by weight thereof are LDPE5% ~ 60%, LLDPE15% ~ 70%, mLLDPE0 ~ 30%, releasing agent 0.3% ~ 0.5%.The toughness of the polyethylene film adopting the formula of this programme and technique to prepare, hot strength, resistance to impact, paracentesis resistance obtain and improve significantly.
Description
Technical field
The present invention relates to polymeric packaging material technical field, be specifically related to GB/T4456-2008 plastic compound flexible packaging polyethylene film and blow moiding method thereof.
Background technology
In plastic compound flexible packaging industry, as the polyethylene film of composite membrane base material, often because its formula is single or not science etc., when tackling the packaging of market different product, sometimes heat-sealing temperature is high causes bag face out-of-flatness or face crystalline substance point or burnt grain and affects aesthetics, sometimes easily break in transportation because of insufficient strength or puncture, sometimes efficiency affecting down-stream enterprise etc. because opening is bad.
Summary of the invention
For above shortcomings in prior art, the invention provides a kind of polyethylene film and the blow moiding method thereof that can increase substantially polyethylene film intensity, it can prevent polyethylene film from causing the defect of bag face out-of-flatness or face crystalline substance point when high temperature heat seal effectively.
In order to reach foregoing invention object, plastic compound flexible packaging polyethylene film provided by the invention forms by internal layer, middle level and skin are three-layer co-extruded; The raw material that described internal layer comprises and percentage by weight as follows: LDPE5% ~ 60%, LLDPE15% ~ 70%, mLLDPE10% ~ 30%, smooth opening agent 0.1% ~ 0.5%, releasing agent 0.3% ~ 0.5%;
The raw material that described middle level comprises and percentage by weight as follows: LDPE5% ~ 60%, LLDPE15% ~ 70%; MLLDPE0 ~ 30%, releasing agent 0.3% ~ 0.5%;
The raw material that described skin comprises and percentage by weight as follows: LDPE5% ~ 60%, LLDPE15% ~ 70%, mLLDPE0 ~ 30%, releasing agent 0.3% ~ 0.5%.
During production, the raw material that preferred described internal layer comprises and percentage by weight as follows: LDPE15% ~ 60%, LLDPE15% ~ 50%, mLLDPE10% ~ 30%, smooth opening agent 0.1% ~ 0.5%, releasing agent 0.3% ~ 0.5%;
The raw material that described middle level comprises and percentage by weight as follows: LDPE15% ~ 60%, LLDPE15% ~ 50%, releasing agent 0.3% ~ 0.5%;
The raw material that described skin comprises and percentage by weight as follows: LDPE10% ~ 60%, LLDPE15% ~ 50%, releasing agent 0.3% ~ 0.5%.
During production, the raw material that further preferred described internal layer comprises and percentage by weight as follows: LDPE25% ~ 50%, LLDPE30% ~ 60%, mLLDPE10% ~ 30%, smooth opening agent 0.1% ~ 0.5%, releasing agent 0.3% ~ 0.5%;
The raw material that described middle level comprises and percentage by weight as follows: LDPE25% ~ 60%, LLDPE30% ~ 60%; Releasing agent 0.3% ~ 0.5%;
The raw material that described skin comprises and percentage by weight as follows: LDPE25% ~ 50%, LLDPE30% ~ 60%, mLLDPE10% ~ 30%, releasing agent 0.3% ~ 0.5%.
During production, the raw material that further preferred described internal layer comprises and percentage by weight as follows: LDPE5% ~ 30%, LLDPE40% ~ 70%, mLLDPE10% ~ 30%, smooth opening agent 0.1% ~ 0.5%, releasing agent 0.3% ~ 0.5%;
The raw material that described middle level comprises and percentage by weight as follows: LDPE5% ~ 30%, LLDPE40% ~ 70%; MLLDPE10% ~ 30%, releasing agent 0.3% ~ 0.5%;
The raw material that described skin comprises and percentage by weight as follows: LDPE5% ~ 30%, LLDPE40% ~ 70%, mLLDPE10% ~ 30%, releasing agent 0.3% ~ 0.5%.
During production, further preferred described smooth opening agent is oleamide.
During production, further preferred described internal layer, middle level are equal with outer field thickness.
Another kind of technical scheme provided by the invention is the blow moiding method of plastic compound flexible packaging polyethylene film, and it comprises the following steps:
Steps A, takes internal layer raw material, middle level raw material and outer raw material;
Step B, adds the batch mixer of each layer respectively, stirs five minutes by above-mentioned ready internal layer, middle level, outer raw material, to be mixed evenly after deliver in the hopper of each layer respectively;
Step C, machine to be extruded and die head add and are heated to setting value and after being incubated 4 hours, open the instrument and equipment of main air blower, upper carry-over pinch rolls, lower carry-over pinch rolls, each layer blowing successively;
Step D, after expecting evenly to extrude, manual air inlet makes the mix polyethylene resin being in molten condition form film bubble, is penetrated carry-over pinch rolls, by film trend successively through each guide roller, corona machine, chill roll, lower carry-over pinch rolls, wrap-up;
Continue manual air inlet, after the mix polyethylene resin of molten condition forms stable film bubble, and polyethylene film width and thickness reach setting value; Open interior cold inlet, outlet autobalance switch, make film bubble be in stable state all the time and can well be cooled;
Step e, start corona machine sided corona treatment thin film exterior layer surface, adjustment voltage, until thin film exterior layer surface tension reaches 42dyn, obtains shaping polyethylene film and carries out normal product rolling.
Compared with the brave polyethylene film of the flexible package of prior art, beneficial effect of the present invention is:
Adopt polyethylene film prepared by the formula of this programme and blow moiding method thereof: 1, there will not be when high temperature heat seal and bubble and burnt material phenomenon; The confficient of static friction of polyethylene film inner face, lower than 0.2, there will not be film bonding phenomenon, and can be used for boiling sterilization in 102 DEG C, shows excellent heat sealability and anti-field trash heat sealability after making composite membrane; 2, the heat-sealing temperature of polyethylene film when sealing bag can significantly reduce, and makes packaging bag appearance looks elegant beautiful, also reduces the consumption of the energy simultaneously; 3, the smooth degree of the film of polyethylene film obtains and reasonably regulates, and improves the efficiency of down-stream enterprise; 4, the toughness of polyethylene film, hot strength, resistance to impact, paracentesis resistance obtain and improve significantly, reduce complex pocket with the broken bag rate of packaging product in transhipment or sales process.
Detailed description of the invention
Below preferred embodiment of the present invention is described in detail, can be easier to make advantages and features of the invention be readily appreciated by one skilled in the art, thus more explicit defining is made to protection scope of the present invention.
The LDPE of the technical program is low density polyethylene (LDPE), and LLDPE is linear low density polyethylene (LLDPE), mLLDPE metallocene linear low density polyethylene, and the polyethylene film of the technical program forms by internal layer, middle level and skin are three-layer co-extruded, and this thickness of three layers is equal.
The first formula of polyethylene film
The raw material that internal layer comprises and percentage by weight as follows: LDPE15% ~ 60%, LLDPE15% ~ 50%, mLLDPE10% ~ 30%, smooth opening agent 0.1% ~ 0.5%, releasing agent 0.3% ~ 0.5%;
The raw material that described middle level comprises and percentage by weight as follows: LDPE15% ~ 60%, LLDPE15% ~ 50%, releasing agent 0.3% ~ 0.5%;
The raw material that described skin comprises and percentage by weight as follows: LDPE10% ~ 60%, LLDPE15% ~ 50%, releasing agent 0.3% ~ 0.5%.
Polyethylene film the second is filled a prescription
The raw material that internal layer comprises and percentage by weight as follows: LDPE25% ~ 50%, LLDPE30% ~ 60%, mLLDPE10% ~ 30%, smooth opening agent 0.1% ~ 0.5%, releasing agent 0.3% ~ 0.5%;
The raw material that described middle level comprises and percentage by weight as follows: LDPE25% ~ 60%, LLDPE30% ~ 60%; Releasing agent 0.3% ~ 0.5%;
The raw material that described skin comprises and percentage by weight as follows: LDPE25% ~ 50%, LLDPE30% ~ 60%, mLLDPE10% ~ 30%, releasing agent 0.3% ~ 0.5%.
The third formula of polyethylene film
The raw material that internal layer comprises and percentage by weight as follows: LDPE5% ~ 30%, LLDPE40% ~ 70%, mLLDPE10% ~ 30%, smooth opening agent 0.1% ~ 0.5%, releasing agent 0.3% ~ 0.5%;
The raw material that described middle level comprises and percentage by weight as follows: LDPE5% ~ 30%, LLDPE40% ~ 70%; MLLDPE10% ~ 30%, releasing agent 0.3% ~ 0.5%;
The raw material that described skin comprises and percentage by weight as follows: LDPE5% ~ 30%, LLDPE40% ~ 70%, mLLDPE10% ~ 30%, releasing agent 0.3% ~ 0.5%.
Smooth opening agent in above-mentioned three kinds of formulas is preferably oleamide; Releasing agent is preferably the high polymer containing the ethylene-trifluoroethylene copolymer of 5% and the low molecular weight polyethylene carrier of 95%.
The cellothene that above-mentioned three kinds of formulas are produced, there will not be brilliant point and burnt material phenomenon, the confficient of static friction of cellothene inner face is lower than 0.2, there will not be film bonding phenomenon, and can be used for boiling sterilization in 102 DEG C, show excellent heat sealability and anti-field trash heat sealability after making composite membrane.The cost of the first formula is lower, but toughness, hot strength, resistance to impact, paracentesis resistance are not as good as the second formula and the third formula, and the compound membrane bag made is applicable to the packaging of flexible products; The third above-mentioned mechanical property of filling a prescription is higher than the second formula with the transparency, but cost also can raise accordingly; The compound membrane bag that above-mentioned second, third kind of formula is made can be used for the packaging of heavier, harder product, packaging bag effectively can be prevented to extrude or pierce through the generation of broken bag phenomenon.
Embodiment 1
The raw material of inner layer film and percetage by weight thereof are: LDPE59.48%, LLDPE19.83%, mLLDPE19.83%, smooth opening agent 4 ‰, releasing agent 4.8 ‰;
The raw material of mesopelagic layer and percetage by weight thereof are: LDPE59.71%, LLDPE39.81%, releasing agent 4.8 ‰;
The raw material of outer membrane and percetage by weight thereof are: LDPE59.71%, LLDPE39.81%, releasing agent 4.8 ‰;
The batching of above-mentioned inner, middle and outer layer is poured in each layer batch mixer, stir 5 minutes, material is mixed, send into hopper; The raw material mixed is added temperature be heated to setting value and be incubated in the extruder of 4 hours; Open the instrument and equipment of main air blower, upper carry-over pinch rolls, lower carry-over pinch rolls, each tunic blow-molding process successively; Machine to be extruded and die head add and are heated to setting value and after being incubated 4 hours, open the instrument and equipment of main air blower, upper carry-over pinch rolls, lower carry-over pinch rolls, each tunic blowing successively; After expecting evenly to extrude, manual air inlet makes the mix polyethylene resin being in molten condition form film bubble, is penetrated carry-over pinch rolls, by polyethylene film trend successively through each guide roller, corona machine, chill roll, lower carry-over pinch rolls, wrap-up; Continue manual air inlet, after the mix polyethylene resin of melting forms stable film bubble, and reach polyethylene film width and thickness to setting value; Open interior cold turnover gas autobalance switch, make film bubble be in stable state all the time and well be cooled; Start corona machine sided corona treatment thin film exterior layer surface, adjustment voltage, until thin film exterior layer surface tension reaches 42dyn, obtains shaping polyethylene film and carries out normal product rolling.
Embodiment 2
The raw material of internal layer and percetage by weight thereof are: LDPE39.65%, LLDPE39.65%, mLLDPE19.83%, smooth opening agent 4 ‰, releasing agent 4.8 ‰;
The raw material in middle level and percetage by weight thereof are: LDPE39.81%, LLDPE59.71%, releasing agent 4.8 ‰;
Outer field raw material and percetage by weight thereof are: LDPE29.86%, LLDPE49.76%, mLLDPE19.9%, releasing agent 4.8 ‰;
The blow moiding method of the present embodiment is identical with embodiment 1.
Embodiment 3
The raw material of internal layer and percetage by weight thereof are: LDPE7.93%, LLDPE67.40%, mLLDPE23.79%, smooth opening agent 4 ‰, releasing agent 4.8 ‰;
The raw material in middle level and percetage by weight thereof are: LDPE7.96%, LLDPE67.68%, mLLDPE23.88%, releasing agent 4.8 ‰
Outer field raw material and percetage by weight thereof are: LDPE7.96%, LLDPE67.68%, mLLDPE23.88%, releasing agent 4.8 ‰;
The blow moiding method of the present embodiment is identical with embodiment 1.
Adopt the obtained plastic compound flexible packaging polyethylene film of the formula of above-mentioned three embodiments to carry out Experiments of Machanics, relevant mechanics test data sees the following form:
Hot strength, fracture norminal strain, the right-angle tearing power of the plastic compound flexible packaging polyethylene film of this formula and explained hereafter, fall the mark physical and mechanical property such as impact and coefficient of friction performance obtain and increase substantially as can be seen from the above table.
Claims (1)
1. a blow moiding method for plastic compound flexible packaging polyethylene film, is characterized in that, comprises the following steps:
Steps A, takes internal layer raw material, middle level raw material and outer raw material;
Step B, adds the batch mixer of each layer respectively, stirs five minutes by above-mentioned ready internal layer, middle level, outer raw material, to be mixed evenly after deliver in the hopper of each layer respectively;
Step C, machine to be extruded and die head add and are heated to setting value and after being incubated 4 hours, open the instrument and equipment of main air blower, upper carry-over pinch rolls, lower carry-over pinch rolls, each layer blowing successively;
Step D, after expecting evenly to extrude, manual air inlet makes the mix polyethylene resin being in molten condition form film bubble, is penetrated carry-over pinch rolls, by film trend successively through each guide roller, corona machine, chill roll, lower carry-over pinch rolls, wrap-up;
Continue manual air inlet, after the mix polyethylene resin of molten condition forms stable film bubble, and polyethylene film width and thickness reach setting value; Open interior cold inlet, outlet autobalance switch, make film bubble be in stable state all the time and can well be cooled;
Step e, start corona machine sided corona treatment thin film exterior layer surface, adjustment voltage, until thin film exterior layer surface tension reaches 42dyn, obtains shaping polyethylene film and carries out normal product rolling;
Wherein, plastic compound flexible packaging polyethylene film forms by internal layer, middle level and skin are three-layer co-extruded; The raw material that described internal layer comprises and percentage by weight as follows: LDPE5% ~ 60%, LLDPE15% ~ 70%, mLLDPE10% ~ 30%, smooth opening agent 0.1% ~ 0.5%, releasing agent 0.3% ~ 0.5%;
The raw material that described middle level comprises and percentage by weight as follows: LDPE5% ~ 60%, LLDPE15% ~ 70%; MLLDPE0 ~ 30%, releasing agent 0.3% ~ 0.5%;
The raw material that described skin comprises and percentage by weight as follows: LDPE5% ~ 60%, LLDPE15% ~ 70%, mLLDPE0 ~ 30%, releasing agent 0.3% ~ 0.5%.
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| CN105172299B (en) * | 2015-09-24 | 2017-12-22 | 重庆松尚久德新材料有限公司 | Boiling film production method |
| CN108032577A (en) * | 2017-11-10 | 2018-05-15 | 苏州鸿博斯特超净科技股份有限公司 | High intensity cleaning PE films and preparation method thereof |
| CN108068421A (en) * | 2017-12-26 | 2018-05-25 | 常州市华健药用包装材料股份有限公司 | Medicinal high-speed packaging polyethylene film |
| CN109016750A (en) * | 2018-07-26 | 2018-12-18 | 黄山永新股份有限公司 | A kind of polyethylene embossing packaging film and its production technology |
| CN109177128B (en) * | 2018-08-29 | 2020-06-19 | 浙江龙诗工艺品股份有限公司 | Plastic film machine-shaping device |
| CN109605890B (en) * | 2019-01-21 | 2020-10-13 | 河南省银丰塑料有限公司 | Three-layer co-extrusion ultralow-temperature heat-sealing packaging film |
| CN109648899B (en) * | 2019-01-21 | 2020-12-15 | 河南省银丰塑料有限公司 | Special film for packing polyethylene flour bags |
| CN110216960B (en) * | 2019-06-03 | 2021-06-11 | 黄山永新股份有限公司 | High-gloss low-haze PE heat shrinkable film and preparation method thereof |
| CN110527179A (en) * | 2019-10-16 | 2019-12-03 | 广东一龙新材料科技有限公司 | A kind of softness polyethylene film master batch and preparation method thereof |
| CN111471201A (en) * | 2020-05-20 | 2020-07-31 | 江苏大海塑料股份有限公司 | High-cleanness film and preparation method thereof |
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| JP2005193609A (en) * | 2004-01-09 | 2005-07-21 | Idemitsu Unitech Co Ltd | Multi-layer film |
| CN102423947A (en) * | 2011-08-03 | 2012-04-25 | 大连方盛塑料有限公司 | Plastic substrate film for chocolate food packaging and processing technic thereof |
| CN102380997A (en) * | 2011-08-05 | 2012-03-21 | 大连方盛塑料有限公司 | Plastic substrate film for food packing and machining process thereof |
| CN103481621B (en) * | 2013-08-30 | 2015-10-28 | 东莞市正新包装制品有限公司 | A kind of low-temperature polyethylene shrink film and film-blowing process thereof |
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Denomination of invention: Polyethylene film and blow molding method for plastic composite flexible packaging Granted publication date: 20160210 Pledgee: Chengdu SME financing Company Limited by Guarantee Pledgor: CHENGDU XINGHENGTAI PRINTING Co.,Ltd. Registration number: Y2024980010713 |
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