CN100425512C - Multilayer packing membrane and method of manufacturing same - Google Patents
Multilayer packing membrane and method of manufacturing same Download PDFInfo
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- CN100425512C CN100425512C CNB2005100306287A CN200510030628A CN100425512C CN 100425512 C CN100425512 C CN 100425512C CN B2005100306287 A CNB2005100306287 A CN B2005100306287A CN 200510030628 A CN200510030628 A CN 200510030628A CN 100425512 C CN100425512 C CN 100425512C
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- density polyethylene
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Abstract
The invention relates to a package film and relative production. Wherein, it comprises outer layer, middle layer, inner layer, whose thicknesses are rationed at 1:1:1 to 1:3:1; the outer layer is made from linear low-density polyethylene, low-density polyethylene, smooth mother material and anti-static mother material; the middle layer is made from linear low-density polyethylene, high-density polyethylene, whiten mother particles; the inner layer is made from linear low-density polyethylene, low-density polyethylene, and opened mother material. The invention can confirm the size of FFS film in the standard, and make its properties reach ISO international standards.
Description
Technical field
The present invention relates to the packaging film field, relate in particular to a kind of multilayer packing membrane and manufacture method thereof.
Background technology
The packing of traditional polyethylene, polypropylene, polyphenyl the second grade resin granular material, use is by open-topped papery compound braided bag, complicated because operation is many when packing, thereby the capacity packing of its wall scroll baling line is limited in below 500 bags/hour usually, be single line year the maximum packing amount about 4,100,000, can only be applicable to the polymer production device of 100,000 tons of/year following output, if be applied to surpass on 200,000 tons/year the polymer packaging line, not only packaging efficiency is low but also cost is high.
The multilayer packing membrane product that matches with the automatic packaging line of massive synthetic resin product, extensively adopt once " moulding-filling-seal (Form-Fill-Seal; be called for short FFS) " blowing-film for bags of continuity, this is the domestic a kind of novel multilayer packing membrane product that had just grown up over the past two years.Because in the package handling process, realized that multiple working procedure and operation process once finish continuously automatically, make capacity packing can reach 1700～1900 bags/hour usually, thereby satisfied the needs of ultra-large type synthetic resin device high-speed packaging.
Manufacturing scale from the synthetic resin device, the average level of nineteen ninety whole world new device is between 8～100,000 tons/year, and the scale of building device after 2000 is 200,000 tons/year at least, just further develop to centralization and maximization direction at present, its newly-built or planning scale of planning to build device is generally more than 400,000 tons.
This shows that along with the synthetic resin unit scale increases rapidly, traditional papery complex film woven bag can not satisfy big now industrial demand far away.And FFS blowing-film for bags product, has outstanding Combination property at aspects such as the packing of product, storage, transportation, protection against the tide and outward appearances, comply with the requirement and the trend of international product packing, simultaneously because of its packaging bag recycling very easily, and can not cause any pollution to environment, meet country and encourage the resource circulation utilization of enforcement and the needs of the strategy of sustainable development, be subjected to user's welcome deeply, will progressively substitute traditional papery complex film woven bag and become the main product of domestic heavy packaging industry.
But because novel FFS blowing-film for bags product is after calendar year 2001, just trial production at home just, the real application time is not very long, its product quality indicator does not up to this point form unified national standard as yet, only is by consulting to determine with the form of contract between each user and the supplier with reference to foreign standard.The prescription of product is more immature, be in update and change among, thereby the pulling strengrth of its product, yield strength, breaking elongation, mechanical properties such as dart impact strength are very unstable, make the automatic packaging production line in downstream be difficult to keep normal, the fast speed production pattern, inclusion often takes place to break, the heat seal strength deficiency, sealing temperature and time do not have multiple accidents such as rule, so that the broken rate after the packing of product is high, cause very big loss not only for the specific product user in downstream, bring very big pressure also for simultaneously the ordinary production of automatic packaging production line.
Summary of the invention
The technical issues that need to address of the present invention have provided a kind of multilayer packing membrane, are intended to solve above-mentioned defective;
The present invention also provides a kind of method of making this multilayer packing membrane.
In order to solve the problems of the technologies described above, the present invention is achieved by the following technical solutions:
Multilayer packing membrane of the present invention comprises three layers: skin, middle level, internal layer; Its thickness proportion is between 1: 1: 1 to 1: 3: 1; Described skin is by linear low density polyethylene (LLDPE), low density polyethylene (LDPE) (LDPE), and smooth masterbatch, antistatic master batch is formed; Described middle level is by linear low density polyethylene, high density polyethylene (HDPE) (HDPE), and brightening mother particle is formed; Described internal layer is by linear low density polyethylene, low density polyethylene (LDPE), and the opening masterbatch is formed;
The percent by weight of the linear low density polyethylene in the described skin, low density polyethylene (LDPE), smooth masterbatch and antistatic master batch is: 60.0～75.0,35.0～20.0,2.5,2.5; The percent by weight of the linear low density polyethylene in the described middle level, high density polyethylene (HDPE) and brightening mother particle is: 60.0～75.0,35.0～20.0,5.0; Linear low density polyethylene in the described internal layer, low density polyethylene (LDPE) and opening masterbatch percent by weight are: 60.0～75.0,37.5～22.5,2.5;
The molten finger of described linear low density polyethylene is 0.2～1.2g/10min, and density is 0.90～0.94g/cm
3
The molten finger of low density polyethylene (LDPE) in the described skin is 0.2～1.2g/10min, and density is 0.90～0.94g/cm
3
The molten finger of low density polyethylene (LDPE) in the described internal layer is 0.2～1.2g/10min, and density is 0.90～0.94g/cm
3
The molten finger of described smooth masterbatch is 0.1～9.0g/10min, and density is 0.90～1.05g/cm
3
The molten finger of described antistatic master batch is 10.1～16.0g/10min, and density is 0.90～1.05g/cm
3
The molten finger of described high density polyethylene (HDPE) is 0.2～1.2g/10min, and density is 0.94～0.96g/cm
3
The molten finger of described brightening mother particle is 0.2～10.2g/10min, and density is 0.90～1.05g/cm
3
The molten finger of described opening masterbatch is 0.2～10.0g/10min, and density is 0.95～1.05g/cm
3
Manufacture method of the present invention realizes by following steps:
Is that 60.0～75.0,35.0～20.0,2.5,2.5 proportioning is sent into first extruder and plastified under 170～220 ℃ condition and extrude processing extruding mean temperature with the linear low density polyethylene in the skin, low density polyethylene (LDPE), smooth masterbatch, antistatic master batch according to percent by weight;
Is that 60.0～75.0,35.0～20.0,5.0 proportioning is sent into second extruder and plastified under 170～220 ℃ condition and extrude processing extruding mean temperature with the linear low density polyethylene in the middle level, high density polyethylene (HDPE), brightening mother particle according to percent by weight;
With the linear low density polyethylene in the internal layer, low density polyethylene (LDPE) and opening masterbatch are that 60.0～75.0,37.5～22.5,2.5 proportioning is sent into the 3rd extruder and plastified under 170～220 ℃ condition and extrude processing extruding mean temperature according to percent by weight;
The batching of three extruders is delivered to die head, under 200～220 ℃ service temperature, difference film forming middle level, internal layer and skin;
Extrude by die head by artificial draping mechanism;
The coolant air that is controlled at below 25 ℃ through temperature propels the price of the film forming bubble, and the film bubble is outside to be cooled off by cooling vane, is cooled off by the multiple tracks coolant air in the film bubble, and on film bubble top hot air is taken away;
Be stabilized under the air pressure of 0.3bar by the coolant air suction quantity may command film bubble of adjusting the film bubble, reach propelling the price of of setting than requiring;
The film bubble enters stable bubble frame behind cooling vane, carry out the measurement of vesicle diameter and thickness distribution by the 360 degree rotations of film bubble survey meter, and feed back to control system, in time rectifies a deviation by the fine setting cooling air quantity, realizes the adjusting and the control of film thickness at last;
The film bubble enters Shears, and Shears is done 360 degree rotations with the rotation traction traction platform so that the irregularity of thickness is distributed on the circumference of whole film bubble;
Film enters one group of horizontal reversing roller of top behind nip rolls, realize the commutation of film;
Film imports corona treatment plant again to remove static behind deflector roll, enter winder mechanism and carry out rolling, sets when requiring when the film coil diameter reaches, and cuts automatically;
Film after the rolling through unreel, print, dry, embossing and flanging handle after rolling again;
The protection plastic bag that has anti-ultraviolet function on the film volume outer cover, and after at both ends packs with plank or carboard is transported into the warehouse for finished product piling or directly loads and transports to the user.
Compared with prior art, the invention has the beneficial effects as follows: every mechanical property (pulling strengrth, yield strength, breaking elongation, the dart impact strength etc.) index that can guarantee its product reaches requirement, thereby can guarantee to satisfy the normal operation of downstream packaging production line.
The specific embodiment
Below in conjunction with the specific embodiment the present invention is described in further detail:
The member and main geometric of FFS film product and permissible error such as following table 1 (is example with conventional thickness 0.16mm)
| Title | Index | Permissible error |
| Bag length | ～800mm | ±6mm |
| The sack width | 400mm | ±5mm |
| The flanging width | 150mm | ±5mm |
| Tube film girth | 1100mm | ±10mm |
| Embossing width | 55mm | ±5mm |
| The embossing belt spacing | 100mm | ±10mm |
| Film thickness | 0.16mm | ±8％ |
| Embossed height | 0.32mm | +50μm/-30μm |
The main performance index of FFS film product and testing standard such as following table 2:
Principle of the present invention and scheme are as follows:
Because the packing of synthetical resin products belongs to heavy packaging industry, not only need to guarantee the intensity of sack, need to take all factors into consideration performances such as heat-sealing, printing, well-pressed and piling simultaneously, so should select PP TYPE three-layer co-extruded or more than three layers for use.Its major cause is: three-layer co-extruded film can progressively decompose index of quality, utilizes different retes to satisfy different index of quality demands, thereby reaches the requirement of satisfying the total quality index.As selecting the prescription that viscosity is good, antistatic, the printing color performance is good at skin; Interlayer selection intensity height, the prescription that deflection is high; Innermost layer selects that heat sealability is good, the prescription of good seal performance etc., satisfies user's demand.According to practical production experience, monofilm is difficult to realize simultaneously these purposes, can only solve this class problem by strengthening the additive-treated oil consumption, finally cause under the situation that equal in quality requires, though manually not needing increases, the corresponding increase of the thickness of its film product, consumption of raw materials increases by 10～15%, public work consumption also increases thereupon, and integrated cost obviously rises.In addition, select for use co-extrusion film more than three layers also can satisfy the demand (as selecting four layers or five-layer co-squeezing film etc. for use) of product design, but need to increase the quantity of extruder, equipment investment expense and operating charges obviously rise, and energy resource consumption increases, and is unreasonable economically.So, aspect the packaging film production of synthetic resin, should adopt three-layer co-extruded film-blowing process.
Embodiment 1: get raw material total amount 100kg.
Concrete prescription is as follows:
By after the production technology extrusion molding, the part that the sample physical dimension is all met table 1 specification requirement is carried out sample analysis by three-layer co-extruded membrane blowing production line, and the mechanical performance index of products obtained therefrom all meets standard-required.Concrete data are as follows:
Embodiment 2: get raw material total amount 1000kg.
Concrete prescription is as follows:
By after the above-mentioned production technology extrusion molding, the part that the sample physical dimension is all met table 1 specification requirement is carried out sample analysis by three-layer co-extruded membrane blowing production line, and the mechanical performance index of products obtained therefrom all meets standard-required.Concrete data are as follows:
Embodiment 3: get raw material total amount 1000kg.
Concrete prescription is as follows:
By after the above-mentioned production technology extrusion molding, the part that the sample physical dimension is all met table 1 specification requirement is carried out sample analysis by three-layer co-extruded membrane blowing production line, and the mechanical performance index of products obtained therefrom all meets standard-required.Concrete data are as follows:
Claims (5)
1. a multilayer packing membrane is characterized in that: comprise three layers: skin, middle level, internal layer; Its thickness proportion is between 1: 1: 1 to 1: 3: 1; Described skin is by linear low density polyethylene, low density polyethylene (LDPE), and smooth masterbatch, antistatic master batch is formed; Described middle level is by linear low density polyethylene, high density polyethylene (HDPE), and brightening mother particle is formed; Described internal layer is by linear low density polyethylene, low density polyethylene (LDPE), and the opening masterbatch is formed.
2. multilayer packing membrane according to claim 1 is characterized in that: the thickness proportion of skin, middle level, internal layer is 1: 2: 1.
3. multilayer packing membrane according to claim 1 and 2 is characterized in that: the percent by weight of the linear low density polyethylene in the described skin, low density polyethylene (LDPE), smooth masterbatch and antistatic master batch is: 60.0～75.0,35.0～20.0,2.5,2.5; The percent by weight of the linear low density polyethylene in the described middle level, high density polyethylene (HDPE) and brightening mother particle is: 60.0～75.0,35.0～20.0,5.0; Linear low density polyethylene in the described internal layer, low density polyethylene (LDPE) and opening masterbatch percent by weight are: 60.0～75.0,37.5～22.5,2.5.
4. multilayer packing membrane according to claim 3 is characterized in that: the molten finger of described linear low density polyethylene is 0.2～1.2g/10min, and density is 0.90～0.94g/cm
3
The molten finger of low density polyethylene (LDPE) in the described skin is 0.2～1.2g/10min, and density is 0.90～0.94g/cm
3
The molten finger of low density polyethylene (LDPE) in the described internal layer is 0.2～1.2g/10min, and density is 0.90～0.94g/cm
3
The molten finger of described smooth masterbatch is 0.1～9.0g/10min, and density is 0.90～1.05g/cm
3
The molten finger of described antistatic master batch is 10.1～16.0g/10min, and density is 0.90～1.05g/cm
3
The molten finger of described high density polyethylene (HDPE) is 0.2～1.2g/10min, and density is 0.94～0.96g/cm
3
The molten finger of described brightening mother particle is 0.2～10.2g/10min, and density is 0.90～1.05g/cm
3
The molten finger of described opening masterbatch is 0.2～10.0g/10min, and density is 0.95～1.05g/cm
3
5. manufacture method of multilayer packing membrane according to claim 1, realize by following steps:
Is that 60.0～75.0,35.0～20.0,2.5,2.5 proportioning is sent into first extruder and plastified under 170～220 ℃ condition and extrude processing extruding mean temperature with the linear low density polyethylene in the skin, low density polyethylene (LDPE), smooth masterbatch, antistatic master batch according to percent by weight;
Is that 60.0～75.0,35.0～20.0,5.0 proportioning is sent into second extruder and plastified under 170～220 ℃ condition and extrude processing extruding mean temperature with the linear low density polyethylene in the middle level, high density polyethylene (HDPE), brightening mother particle according to percent by weight;
With the linear low density polyethylene in the internal layer, low density polyethylene (LDPE) and opening masterbatch are that 60.0～75.0,37.5～22.5,2.5 proportioning is sent into the 3rd extruder and plastified under 170～220 ℃ condition and extrude processing extruding mean temperature according to percent by weight;
The batching of three extruders is delivered to die head, under 200～220 ℃ service temperature, difference film forming middle level, internal layer and skin;
Extrude by die head by artificial draping mechanism;
The coolant air that is controlled at below 25 ℃ through temperature propels the price of the film forming bubble, and the film bubble is outside to be cooled off by cooling vane, is cooled off by the multiple tracks coolant air in the film bubble, and on film bubble top hot air is taken away;
Be stabilized under the air pressure of 0.3bar by the coolant air suction quantity may command film bubble of adjusting the film bubble, reach propelling the price of of setting than requiring;
The film bubble enters stable bubble frame behind cooling vane, carry out the measurement of vesicle diameter and thickness distribution by the 360 degree rotations of film bubble survey meter, and feed back to control system, in time rectifies a deviation by the fine setting cooling air quantity, realizes the adjusting and the control of film thickness at last;
The film bubble enters Shears, and Shears is done 360 degree rotations with the rotation traction traction platform so that the irregularity of thickness is distributed on the circumference of whole film bubble;
Film enters one group of horizontal reversing roller of top behind nip rolls, realize the commutation of film;
Film imports corona treatment plant again to remove static behind deflector roll, enter winder mechanism and carry out rolling, sets when requiring when the film coil diameter reaches, and cuts automatically;
Film after the rolling through unreel, print, dry, embossing and flanging handle after rolling again;
The protection plastic bag that has anti-ultraviolet function on the film volume outer cover, and after at both ends packs with plank or carboard is transported into the warehouse for finished product piling or directly loads and transports to the user.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100306287A CN100425512C (en) | 2005-10-18 | 2005-10-18 | Multilayer packing membrane and method of manufacturing same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100306287A CN100425512C (en) | 2005-10-18 | 2005-10-18 | Multilayer packing membrane and method of manufacturing same |
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| CN1951773A CN1951773A (en) | 2007-04-25 |
| CN100425512C true CN100425512C (en) | 2008-10-15 |
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| CNB2005100306287A Expired - Fee Related CN100425512C (en) | 2005-10-18 | 2005-10-18 | Multilayer packing membrane and method of manufacturing same |
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| CN101787155B (en) * | 2010-03-16 | 2012-07-25 | 南阳金牛彩印集团有限公司 | Preparation method of stewing film for beverage packing |
| CN102452204B (en) * | 2010-10-22 | 2014-08-13 | 中国石油化工股份有限公司 | FFS film for heavy packaging |
| CN102501513B (en) * | 2011-11-24 | 2013-06-19 | 佛山新长盛塑料薄膜有限公司 | Puncture-resistant heavy packaging composite film and preparation thereof |
| CN102850625A (en) * | 2012-08-30 | 2013-01-02 | 苏州九鼎珍珠棉有限公司 | Environment-friendly bubble film |
| CN103009738B (en) * | 2012-12-27 | 2016-03-30 | 广东众和化塑有限公司 | A kind of FFS bis-layers of co-extrusion multilayer packing membrane and preparation method thereof |
| CN105619745B (en) * | 2014-11-07 | 2017-12-26 | 上海海湾石化有限公司 | The preparation method of the three-layer co-extruded multilayer packing membranes of FFS |
| CN106084432A (en) * | 2016-06-12 | 2016-11-09 | 江阴市江泰高分子新材料有限公司 | Antistatic pe film and preparation method thereof |
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| CN107738490A (en) * | 2017-09-29 | 2018-02-27 | 江阴润渲纸业有限公司 | A kind of heat insulation foaming paper and preparation method thereof |
| CN109130416B (en) * | 2018-07-11 | 2020-05-05 | 汪培杰 | Polyethylene cast film and preparation process thereof |
| CN110435106A (en) * | 2019-08-09 | 2019-11-12 | 东莞市茂宏电子塑胶有限公司 | A kind of PE protection film production process |
| CN110733220A (en) * | 2019-09-28 | 2020-01-31 | 宁波市付枫塑业有限公司 | film for automatic packaging machine and preparation method thereof |
| CN110641114B (en) * | 2019-10-12 | 2021-05-04 | 黄山永新股份有限公司 | Composite film suitable for quickly inserting edge to make bag |
| CN111204093A (en) * | 2020-01-13 | 2020-05-29 | 华威聚酰亚胺有限责任公司 | Logistics protective film |
| CN112874092A (en) * | 2021-01-14 | 2021-06-01 | 广东德冠薄膜新材料股份有限公司 | High-stiffness heat-resistant BOPE film and preparation method thereof |
| CN113172972A (en) * | 2021-03-12 | 2021-07-27 | 黄山源点新材料科技有限公司 | FFS packaging film and preparation method thereof |
| CN116176083A (en) * | 2022-12-30 | 2023-05-30 | 湖南工业大学 | Five-layer co-extrusion polyethylene film for powder-liquid double-chamber bag and preparation method thereof |
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| CN2378350Y (en) * | 1999-05-20 | 2000-05-17 | 厦门宝龙工业有限公司 | Packing film |
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