CN102423946A - Food package plastic base material film and production technology thereof - Google Patents
Food package plastic base material film and production technology thereof Download PDFInfo
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- CN102423946A CN102423946A CN2011102206077A CN201110220607A CN102423946A CN 102423946 A CN102423946 A CN 102423946A CN 2011102206077 A CN2011102206077 A CN 2011102206077A CN 201110220607 A CN201110220607 A CN 201110220607A CN 102423946 A CN102423946 A CN 102423946A
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Abstract
The invention relates to a food package plastic base material film and a production technology thereof. The film has a three-layered structure comprising an inner layer, a middle layer and an outer layer. The inner layer, the middle layer and the outer layer are all produced from low-density polyethylene LDPE and linear low-density polyethylene LLDPE. The production technology comprises steps of mixed feeding and extruding, film blowing, shaping, drawing and cutting, and the like. The food package plastic base material film provided by the invention is advantaged in high barrier property, high air tightness, pollution resistance, high heat-sealing strength, good heat-sealing performance, certain pressure resistance, and certain impact resistance. The food package plastic base material film has a foodstuff safety certification, and can be produced into food packages.
Description
Technical field
The invention belongs to the plastics chemical industry, relate in particular to a kind of packaging for foodstuff plastic basis material film and production technology thereof.
Background technology
Present packaging for foodstuff industry says that the packing base material film quantity that needs is big, kind is many, adopts the very difficult packing instructions that adapt to Special food of film of single raw material production.Trace it to its cause, though mainly be that respectively to produce producer's production technology of plastic raw materials each has something to recommend him, every kind of raw material all has its weak point, so the film of producing is difficult to satisfy the demand of various situation.Adopt different material to mix the way of using though some companies also have, owing to lack the necessary testing equipment and the testing program of checkout equipment and system, its effect is unsatisfactory.
Packaging for foodstuff plastic basis material film is produced with blow moiding method with the polyethylene raw material usually.But it is competent to want to reach above-mentioned these performance requirements and be not single polyethylene blown film technology institute, has therefore developed the polyethylene raw material of multiple performance.Yet; The polyethylene film of individual layer is poor to the barrier of gases such as oxygen; Packing sauce class time-like is prone to cause sealing part to pollute, and general flexible package punch polyethylene film is poor to the sealing property of this type of packing; Can not satisfy the requirement of its technology of the package and connection with wrapping of piece storage period, therefore must adopt barrier property and be mingled with sealing property all good multilaminar polyethylene modified film or laminated film.
Especially harsh for the requirement of packaging for foodstuff, require that the plastic basis material film must possess high barrier, high-air-tightness, resistance tocrocking, heat seal strength is high, heat sealability is good, and certain resistance to pressure and resistance to impact are arranged, and meets the food security authentication.Be fit to packaging for foodstuff and use the useful LLDPE LLDPE of polyethylene raw material, hp-ldpe LDPE and metallocene linear polyethylene mLLDPE.But; The plastic sheeting of simply one or more polyethylene raw material mixing after-blow being made can not satisfy the needs of extra package; Also need to carry out qualitative and quantitative analysis, do the careful proportioning of system, be aided with necessary processing aid again according to designing requirement according to density, melt index, vicat softening point temperature, biaxial tension rate and the hot strength of various polyethylene raw materials; Finally make the plastic sheeting of blowing out within the specific limits, satisfy the requirement of extra package.
Summary of the invention
The present invention has designed a kind of packaging for foodstuff plastic basis material film and production technology thereof; Its purpose is to provide a kind of high barrier, high-air-tightness, resistance tocrocking, heat seal strength is high, heat sealability is good; Certain resistance to pressure and resistance to impact are arranged, meet the packaging for foodstuff Bag Material base film of food security authentication.
In order to solve the technical problem of above-mentioned existence, the present invention has adopted following scheme:
A kind of packaging for foodstuff plastic basis material film is characterized in that: comprise internal layer, intermediate layer and outer three-decker; Described internal layer, intermediate layer and skin all adopt low density polyethylene and LLDPE LLDPE to process.
It is 1.8-2.4g/10min that said internal layer adopts melt index, and density is 0.923-0.927g/cm
2Low density polyethylene, melt index be 0.9-1.2g/10min, density is 0.918-0.921g/cm
2LLDPE LLDPE, its quality proportioning is LDPE:LLDPE=30-40:60-70;
It is 1.8-2.4g/10min that said centre is adopted melt index layer by layer, and density is 0.923-0.927g/cm
2Low density polyethylene, melt index be 0.9-1.2g/10min, density is 0.918-0.921g/cm
2The LLDPE LLDPE, its quality proportioning is LDPE:LLDPE=30-40:60-70;
Said outer employing melt index is 1.8-2.4g/10min, and density is 0.923-0.927g/cm
2Low density polyethylene, melt index be 0.9-1.2g/10min, density is 0.918-0.921g/cm
2LLDPE LLDPE, its quality proportioning is LDPE:LLDPE=30-40:60-70.
Mass ratio between said internal layer, intermediate layer and the skin is 1:1:1.
A kind of preparation technology of packaging for foodstuff plastic basis material film is characterized in that may further comprise the steps:
Send extruder to extrude after each raw material mixed in proportion, wherein the melt temperature of extruder is 175 ℃-195 ℃, and the initial temperature of charging is 175 ℃-185 ℃; The roller bar rotating speed of main frame is 80r/min-120r/min; Carry out blown film then; Finalize the design, draw cutting at last.
The incorporation time of said raw material is 15min-20min.
The temperature of said film head raises from bottom to top gradually, and its temperature range is 165 ℃-205 ℃.
The thickness of said film is not more than 0.05mm.
This packaging for foodstuff plastic basis material film and production technology thereof have following beneficial effect:
(1) packaging for foodstuff plastic basis material thin-film barrier property of the present invention and air-tightness are good, have good resistance tocrocking, resistance to pressure and resistance to impact.
(2) packaging for foodstuff plastic basis material film of the present invention has heat seal strength height, characteristics that heat sealability is good simultaneously, meets the state food safety certification.
(3) packaging for foodstuff plastic basis material film production process of the present invention has improved the inherent quality of product, has improved appearance, has reduced labour intensity simultaneously, has improved production efficiency.
(4) packaging for foodstuff plastic basis material film production process of the present invention, reasonable in design, flow process is simple, is easy to realize.
The specific embodiment
Below in conjunction with specific embodiment, the present invention is further specified:
The following example is intended to explain the optimal way of test, and in these embodiment, except as otherwise noted, described percentage is by weight.
Following testing equipment adopts: the blowing main frame: three-layer co-extruded traction rotation blown film unit, drawn subsidiary engine, winder etc. and formed by three extruders, a die head, typing cage, a cover.
Checkout equipment: GBL-L electronic tension tester and MXD-01 friction coefficient instrument.
Embodiment 1
With the ratio of raw material in internal layer low density polyethylene 35%, LLDPE LLDPE65%; The intermediate layer is in the ratio of low density polyethylene 35%, LLDPE LLDPE65%; Outer ratio preparation raw materials for production in low density polyethylene 35%, LLDPE LLDPE65%; Mix 15min, setting melt temperature is 185 ℃-195 ℃, and the roller bar rotating speed of main frame is 175 ℃-205 ℃ of 120r/min film head temperature, typing, traction cutting.The sealed polyethylene plastic performance of producing is following: hot strength is that 28.99Mpa, elongation at break are 970.85%, heat seal strength is 10.2, coefficient of friction is 0.298.
Embodiment 2
With the ratio of raw material in internal layer low density polyethylene 40%, LLDPE LLDPE60%; The intermediate layer is in the ratio of low density polyethylene 30%, LLDPE LLDPE70%; Outer ratio preparation raw materials for production in low density polyethylene 35%, LLDPE LLDPE65%; Mix 17min, setting melt temperature is 185 ℃-195 ℃, and the roller bar rotating speed of main frame is 175 ℃-205 ℃ of 100r/min film head temperature, typing, traction cutting.The sealed polyethylene plastic performance of producing is following: hot strength is that 28.99Mpa, elongation at break are 970.85%, heat seal strength is 10.2, coefficient of friction is 0.298.
Embodiment 3
With the ratio of raw material in internal layer low density polyethylene 30%, LLDPE LLDPE70%; The intermediate layer is in the ratio of low density polyethylene 30%, LLDPE LLDPE70%; Outer ratio preparation raw materials for production in low density polyethylene 35%, LLDPE LLDPE65%; Mix 20min, setting melt temperature is 185 ℃-195 ℃, and the roller bar rotating speed of main frame is 175 ℃-205 ℃ of 120r/min film head temperature, typing, traction cutting.The sealed polyethylene plastic performance of producing is following: hot strength is that 28.99Mpa, elongation at break are 970.85%, heat seal strength is 10.2, coefficient of friction is 0.298.
Combine specific embodiment that the present invention has been carried out exemplary description above; Obvious realization of the present invention does not receive the restriction of aforesaid way; As long as the various improvement of having adopted method design of the present invention and technical scheme to carry out; Or design of the present invention and technical scheme are directly applied to other occasion without improving, all in protection scope of the present invention.
Claims (6)
1. a packaging for foodstuff plastic basis material film is characterized in that: comprise internal layer, intermediate layer and outer three-decker; Described internal layer, intermediate layer and skin all adopt low density polyethylene and LLDPE LLDPE to process.
2. according to the said packaging for foodstuff plastic basis material of claim 1 film, it is characterized in that: it is 1.8-2.4g/10min that said internal layer adopts melt index, and density is 0.923-0.927g/cm
2Low density polyethylene, melt index be 0.9-1.2g/10min, density is 0.918-0.921g/cm
2LLDPE LLDPE, its quality proportioning is LDPE:LLDPE=30-40:60-70;
It is 1.8-2.4g/10min that melt index is adopted in said intermediate layer, and density is 0.923-0.927g/cm
2Low density polyethylene, melt index be 0.9-1.2g/10min, density is 0.918-0.921g/cm
2The LLDPE LLDPE, its quality proportioning is LDPE:LLDPE=30-40:60-70;
Said outer employing melt index is 1.8-2.4g/10min, and density is 0.923-0.927g/cm
2Low density polyethylene, melt index be 0.9-1.2g/10min, density is 0.918-0.921g/cm
2LLDPE LLDPE, its quality proportioning is LDPE:LLDPE=30-40:60-70.
3. according to claim 1 or 2 said packaging for foodstuff plastic basis material films, it is characterized in that: the mass ratio between said internal layer, intermediate layer and the skin is 1:1:1.
4. preparation technology according to each said packaging for foodstuff plastic basis material film of claim 1-3 is characterized in that may further comprise the steps:
Send extruder to extrude after each raw material mixed in proportion, wherein the melt temperature of extruder is 175 ℃-195 ℃, and the initial temperature of charging is 175 ℃-185 ℃; The roller bar rotating speed of main frame is 80r/min-120r/min; Carry out blown film then; Finalize the design, draw cutting at last.
5. according to the preparation technology of the said packaging for foodstuff plastic basis material of claim 4 film, it is characterized in that: the incorporation time of said raw material is 15min-20min.
6. according to the preparation technology of claim 4 or 5 said packaging for foodstuff plastic basis material films, it is characterized in that: the temperature of said film head raises from bottom to top gradually, and its temperature range is 165 ℃-205 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102206077A CN102423946A (en) | 2011-08-03 | 2011-08-03 | Food package plastic base material film and production technology thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102206077A CN102423946A (en) | 2011-08-03 | 2011-08-03 | Food package plastic base material film and production technology thereof |
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| CN102423946A true CN102423946A (en) | 2012-04-25 |
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| CN2011102206077A Pending CN102423946A (en) | 2011-08-03 | 2011-08-03 | Food package plastic base material film and production technology thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102767244B (en) * | 2012-07-30 | 2016-06-15 | 徐洁 | The making method of a kind of vacuum heat-insulating plate and this vacuum heat-insulating plate is applied to the constructional method of external wall |
| CN106414053A (en) * | 2014-06-19 | 2017-02-15 | 阿格洛法士公司 | Compositions and methods for packaging produce |
| CN111117050A (en) * | 2019-12-25 | 2020-05-08 | 郑州市祥泰塑业有限公司 | PE blown film and preparation method thereof |
| CN115556449A (en) * | 2022-09-15 | 2023-01-03 | 常州琦罡新材料有限公司 | Enhanced liquid packaging composite film |
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| JPH06286086A (en) * | 1993-03-31 | 1994-10-11 | Kyoraku Co Ltd | Heat-resistant plastic container and manufacture thereof |
| CN1978184A (en) * | 2005-12-01 | 2007-06-13 | 丹阳市万乐复合材料厂 | Method for producing blowing-film for bags |
| CN101367283A (en) * | 2008-07-22 | 2009-02-18 | 黄山永新股份有限公司 | Antimicrobial polyethylene film and preparing technique thereof |
| EP2027999A1 (en) * | 2007-07-30 | 2009-02-25 | Donato Volpi | Heat-shrinkable film and its use for beverage bundles |
| CN101475074A (en) * | 2009-01-22 | 2009-07-08 | 黄山永佳（集团）有限公司 | Self-lubricating polyethylene membrane |
-
2011
- 2011-08-03 CN CN2011102206077A patent/CN102423946A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06286086A (en) * | 1993-03-31 | 1994-10-11 | Kyoraku Co Ltd | Heat-resistant plastic container and manufacture thereof |
| CN1978184A (en) * | 2005-12-01 | 2007-06-13 | 丹阳市万乐复合材料厂 | Method for producing blowing-film for bags |
| EP2027999A1 (en) * | 2007-07-30 | 2009-02-25 | Donato Volpi | Heat-shrinkable film and its use for beverage bundles |
| CN101367283A (en) * | 2008-07-22 | 2009-02-18 | 黄山永新股份有限公司 | Antimicrobial polyethylene film and preparing technique thereof |
| CN101475074A (en) * | 2009-01-22 | 2009-07-08 | 黄山永佳（集团）有限公司 | Self-lubricating polyethylene membrane |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102767244B (en) * | 2012-07-30 | 2016-06-15 | 徐洁 | The making method of a kind of vacuum heat-insulating plate and this vacuum heat-insulating plate is applied to the constructional method of external wall |
| CN106414053A (en) * | 2014-06-19 | 2017-02-15 | 阿格洛法士公司 | Compositions and methods for packaging produce |
| CN111117050A (en) * | 2019-12-25 | 2020-05-08 | 郑州市祥泰塑业有限公司 | PE blown film and preparation method thereof |
| CN115556449A (en) * | 2022-09-15 | 2023-01-03 | 常州琦罡新材料有限公司 | Enhanced liquid packaging composite film |
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Owner name: DALIAN RUIXIANDA PLASTIC CO., LTD. Free format text: FORMER OWNER: DALIAN FANGSHENG PLASTIC CO., LTD. Effective date: 20130603 |
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Effective date of registration: 20130603 Address after: Zhanqian street Jinzhou District of Dalian City, Liaoning province 116100 WUJIATUN Airport Applicant after: Dalian Ruixianda Plastic Co., Ltd. Address before: 116100, Liaoning, Dalian province Jinzhou District Station Street Wu Tun Airport Applicant before: Dalian Fangsheng Plastic Co., Ltd. |
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Application publication date: 20120425 |