CN102416745B - A kind of plastic substrate film of packaging for foodstuff and processing technology thereof - Google Patents
A kind of plastic substrate film of packaging for foodstuff and processing technology thereof Download PDFInfo
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- CN102416745B CN102416745B CN201110222858.9A CN201110222858A CN102416745B CN 102416745 B CN102416745 B CN 102416745B CN 201110222858 A CN201110222858 A CN 201110222858A CN 102416745 B CN102416745 B CN 102416745B
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Abstract
The invention discloses a kind of plastic substrate film of packaging for foodstuff, formed by the three-layer co-extruded blowing of internal layer, intermediate layer and skin, described internal layer raw material comprises LDPE low density polyethylene (LDPE), LLDPE LLDPE and mLLDPE metallocene linear-low density polyethylene, and described intermediate layer and outer raw material are LDPE low density polyethylene (LDPE) and LLDPE LLDPE.Food package plastic base material film barrier of the present invention and air-tightness good, the resistance tocrocking had, resistance to pressure and resistance to impact, have the feature that heat seal strength is high, heat sealability is good simultaneously, meet state food safety certification.Food package plastic base material film production technology of the present invention, reasonable in design, flow process is simple, is easy to realize.
Description
Technical field
The present invention relates to the packaging material of food, the plastic substrate film of specifically a kind of packaging for foodstuff and processing technology thereof.
Background technology
Current food packaging industry says that the packaging base material film quantity needed is large, kind is many, and the film adopting single raw material to produce is difficult to the packing instructions adapting to Special food.Trace it to its cause, although producer's production technology of mainly respectively producing plastic raw materials is each has something to recommend him, often kind of raw material has its weak point, so the film produced is difficult to the demand meeting various situation.Although also there are the way adopting different material used in combination in some companies, owing to lacking necessary testing equipment and the testing program of checkout equipment and system, its effect is unsatisfactory.
Food packing plastic substrate film is produced with polyethylene raw material blow moiding method usually.But wanting to reach these performance requirements above-mentioned is not that single polyethylene blown film technique institute is competent, has therefore developed the polyethylene raw material of multiple performance.But, the barrier of polyethylene film to gases such as oxygen of individual layer is poor, when packing fried class, sealing part is easily caused to pollute, the sealing property (also known as field trash sealing property) that general flexible package punch polyethylene film is packed this type of is poor, the requirement of its technology of the package and connection with wrapping of piece storage period can not be met, therefore must adopt barrier property and be mingled with all good multilaminar polyethylene modified film of sealing property or laminated film.
Summary of the invention
In order to overcome above-mentioned defect, the invention provides that one possesses high barrier, high-air-tightness, resistance tocrocking, heat seal strength is high, heat sealability good, having plastic substrate film and the processing technology thereof of the packaging for foodstuff of certain resistance to pressure and resistance to impact.
Technical scheme of the present invention is achieved in that a kind of plastic substrate film of packaging for foodstuff, formed by the three-layer co-extruded blowing of internal layer, intermediate layer and skin, described internal layer raw material comprises LDPE low density polyethylene (LDPE), LLDPE LLDPE and mLLDPE metallocene linear-low density polyethylene, and described intermediate layer and outer raw material are LDPE low density polyethylene (LDPE) and LLDPE LLDPE.
In described internal layer, the mass ratio of LDPE, LLDPE and mLLDPE is 25-35:35-45:15-35, and wherein the melt index of LDPE is 1.8-2.2g/10min, and density is 0.923-0.926g/cm
2; The melt index of LLDPE is 1.9-2.2g/10min, and density is 0.918-0.922g/cm
2; The melt index of mLLDPE is 1.9-2.4g/10min, and density is 0.910-0.915g/cm
2;
In described intermediate layer, LDPE, LLDPE mass ratio is 35-45:55-65, and wherein the melt index of LDPE is 1.8-2.2g/10min, and density is 0.923-0.926g/cm
2; The melt index of LLDPE is 1.9-2.2g/10min, and density is 0.918-0.922g/cm
2;
In described skin, the mass ratio of LDPE and LLDPE is 30-40:65-75, and wherein the melt index of LDPE is 0.8-2.1g/10min, and density is 0.923-0.926g/cm
2; The melt index of LLDPE is 1.9-2.2g/10min, and density is 0.918-0.922g/cm
2.
Described internal layer, mass ratio between intermediate layer and skin are 1:1:1.
The processing technology of the plastic substrate film of packaging for foodstuff is: mixed in proportion by described raw material, stir; Feeding extrusion machine fused mass is extruded, and melt temperature is 175-195 DEG C; Carry out the sizing of die head blown film, die head temperature raises gradually from bottom to top, and its scope control is at 165-205 DEG C; Then cutting is drawn; Last rolling.
The time of described stirring is 15-20min.
The rotating speed of described extruder controls at 80-120r/min.
The invention has the beneficial effects as follows: (1) food package plastic base material film barrier of the present invention and air-tightness good, the resistance tocrocking had, resistance to pressure and resistance to impact, there is the feature that heat seal strength is high, heat sealability is good simultaneously, meet state food safety certification.(2) food package plastic base material film production technology of the present invention, reasonable in design, and flow process is simple, is easy to realize.(3) food package plastic base material film production technology of the present invention, improves the inherent quality of product, improves appearance, reduce labour intensity simultaneously, improve production efficiency.
Detailed description of the invention
Below in conjunction with specific embodiment, explanation is further explained to the present invention.In following examples, the manufacturing equipment of food package plastic base material film all adopts: three-layer co-extruded traction rotates blown film unit, is made up of three extruders, die head, sizing cage, a set of traction subsidiary engine, a winder etc.; Checkout equipment all adopts: GBL-L electronic tension tester and MXD-01 friction coefficient instrument.
By the ratio of raw material in internal layer low density polyethylene 30%, LLDPE LLDPE40%, metallocene linear polyethylene mLLDPE30%; Intermediate layer is in the ratio of low density polyethylene 40%, LLDPE LLDPE60%; The outer ratio in low density polyethylene 33%, LLDPE LLDPE67%, internal layer, mass ratio between intermediate layer and skin are that 1:1:1 prepares raw materials for production, stir 15-20min, feeding extrusion machine fused mass is extruded, melt temperature is 175-195 DEG C, and the rotating speed of extruder controls at 80r/min; Carry out the sizing of die head blown film, die head temperature raises gradually from bottom to top, and its scope control is at 165-195 DEG C; Then cutting is drawn; Last rolling.The performance parameter of the product produced is: hot strength: 22.34Mpa; Elongation at break: 718.5%; Heat seal strength: 9.8; Coefficient of friction: 0.213.
The above; be only the present invention's preferably detailed description of the invention; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; be equal to according to technical scheme of the present invention and inventive concept thereof and replace or change, all should be encompassed within protection scope of the present invention.
Claims (4)
1. the plastic substrate film of a packaging for foodstuff, it is characterized in that, formed by the three-layer co-extruded blowing of internal layer, intermediate layer and skin, described internal layer raw material comprises LDPE low density polyethylene (LDPE), LLDPE LLDPE and mLLDPE metallocene linear-low density polyethylene, described intermediate layer and outer raw material are LDPE low density polyethylene (LDPE) and LLDPE LLDPE, processing step is: mixed in proportion by described raw material, stir; Feeding extrusion machine fused mass is extruded, and melt temperature is 175-195 DEG C; Carry out the sizing of die head blown film, die head temperature raises gradually from bottom to top, and its scope control is at 165-205 DEG C; Then cutting is drawn; Last rolling;
In described internal layer, the mass ratio of LDPE, LLDPE and mLLDPE is 25-35:35-45:15-35, and wherein the melt index of LDPE is 1.8-2.2g/10min, and density is 0.923-0.926g/cm
2; The melt index of LLDPE is 1.9-2.2g/10min, and density is 0.918-0.922g/cm
2; The melt index of mLLDPE is 1.9-2.4g/10min, and density is 0.910-0.915g/cm
2;
In described intermediate layer, LDPE, LLDPE mass ratio is 35-45:55-65, and wherein the melt index of LDPE is 1.8-2.2g/10min, and density is 0.923-0.926g/cm
2; The melt index of LLDPE is 1.9-2.2g/10min, and density is 0.918-0.922g/cm
2;
In described skin, the mass ratio of LDPE and LLDPE is 30-40:65-75, and wherein the melt index of LDPE is 0.8-2.1g/10min, and density is 0.923-0.926g/cm
2; The melt index of LLDPE is 1.9-2.2g/10min, and density is 0.918-0.922g/cm
2.
2. the plastic substrate film of packaging for foodstuff according to claim 1, is characterized in that, described internal layer, mass ratio between intermediate layer and skin are 1:1:1.
3. the plastic substrate film of packaging for foodstuff according to claim 1, is characterized in that, the time of described stirring is 15-20min.
4. the plastic substrate film of packaging for foodstuff according to claim 3, is characterized in that, the rotating speed of described extruder controls at 80-120r/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110222858.9A CN102416745B (en) | 2011-08-05 | 2011-08-05 | A kind of plastic substrate film of packaging for foodstuff and processing technology thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110222858.9A CN102416745B (en) | 2011-08-05 | 2011-08-05 | A kind of plastic substrate film of packaging for foodstuff and processing technology thereof |
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| Publication Number | Publication Date |
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| CN102416745A CN102416745A (en) | 2012-04-18 |
| CN102416745B true CN102416745B (en) | 2015-08-12 |
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| CN201110222858.9A Expired - Fee Related CN102416745B (en) | 2011-08-05 | 2011-08-05 | A kind of plastic substrate film of packaging for foodstuff and processing technology thereof |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104760355A (en) * | 2012-12-31 | 2015-07-08 | 台州市珠叶机械科技有限公司 | Laminated packaging material |
| CN104760356A (en) * | 2012-12-31 | 2015-07-08 | 台州市珠叶机械科技有限公司 | Packaging container |
| CN104760338A (en) * | 2012-12-31 | 2015-07-08 | 台州市珠叶机械科技有限公司 | Packaging container |
| CN104960297B (en) * | 2015-07-13 | 2017-01-25 | 河南大有塑业发展有限公司 | Polyethylene composite film prepared by casting method and preparation method of polyethylene composite film |
| JP6916787B2 (en) | 2015-12-11 | 2021-08-11 | ダウ グローバル テクノロジーズ エルエルシー | Multilayer polyethylene film and articles made from it |
| CN106697535A (en) * | 2017-01-21 | 2017-05-24 | 嘉兴乾昆工业设计有限公司 | Multipurpose experience feeling enhanced extruding type mask packaging bag |
| CN109747253A (en) * | 2017-11-07 | 2019-05-14 | 长沙银腾塑印包装有限公司 | A kind of blow molding PE film and its production method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| TW505678B (en) * | 1997-04-30 | 2002-10-11 | Mitsui Chemicals Inc | Sealant resin composition for use in retort film and sealant film |
| KR100745318B1 (en) * | 2001-12-24 | 2007-08-01 | 삼성토탈 주식회사 | Linear low density polyethylene resin composition with high impact strength |
| US6803113B2 (en) * | 2002-09-13 | 2004-10-12 | Honeywell International Inc. | High barrier antifog laminate for case ready meat packaging |
| CN101367283B (en) * | 2008-07-22 | 2010-12-01 | 黄山永新股份有限公司 | Antimicrobial polyethylene film and preparing technique thereof |
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Owner name: DALIAN RUIXIANDA PLASTIC CO., LTD. Free format text: FORMER OWNER: DALIAN FANGSHENG PLASTIC CO., LTD. Effective date: 20130607 |
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Effective date of registration: 20130607 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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