CN102416747A - Plastic substrate film for food package and processing technology - Google Patents
Plastic substrate film for food package and processing technology Download PDFInfo
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- CN102416747A CN102416747A CN2011102229416A CN201110222941A CN102416747A CN 102416747 A CN102416747 A CN 102416747A CN 2011102229416 A CN2011102229416 A CN 2011102229416A CN 201110222941 A CN201110222941 A CN 201110222941A CN 102416747 A CN102416747 A CN 102416747A
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Abstract
The invention discloses a plastic substrate film for food package. The film provided by the invention is prepared by coextrusion blow molding of three layers of an inner layer, an interface layer and an external layer. The inner layer, the interface layer and the external layer all contain the following raw materials of: LDPE low density polyethylene and LLDPE linear low density polyethylene, wherein the mass ratio of LDPE to LLDPE in the inner layer is 65-75:25-35; the mass ratio of LDPE to LLDPE in the interface layer is 35-45:55-65; and the mass ratio of LDPE to LLDPE in the external layer is 30-40:60-70. The plastic substrate film for food package has good barrier property and air tightness, good contamination resistance, pressure resistance and impact resistance, and simultaneously has high heat-sealing strength and good heat-sealing performance, and accords with the national food security certification.
Description
Technical field
The present invention relates to the packaging material of food, specifically is a kind of plastic basis material film and processing technology thereof of packaging for foodstuff.
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; Pack fried time-like, be prone to cause sealing part to pollute, general flexible package punch polyethylene film is poor to the sealing property (claiming the field trash sealing property again) 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.
Summary of the invention
In order to overcome above-mentioned defective, the invention provides and a kind ofly possess that high barrier, high-air-tightness, resistance tocrocking, heat seal strength are high, heat sealability is good, the plastic basis material film and the processing technology thereof of the packaging for foodstuff of certain resistance to pressure and resistance to impact arranged.
Technical scheme of the present invention is achieved in that a kind of plastic basis material film of packaging for foodstuff; Form by internal layer, intermediate layer and outer three-layer co-extruded blowing; Include following raw material in said internal layer, intermediate layer and the skin, LDPE low density polyethylene (LDPE) and LLDPE LLDPE.
LDPE and LLDPE mass ratio are 65-75:25-35 in the said internal layer; LDPE and LLDPE mass ratio are 35-45:55-65 in the said intermediate layer; LDPE and LLDPE mass ratio are 30-40:60-70 in the said skin.
Mass ratio between said internal layer, intermediate layer and the skin is 1:1:1.
The melt index of said LDPE is 1.8-2.0g/10min, and density is 0.924-0.927g/cm
2The melt index of said LLDPE is 1.9-2.2g/10min, and density is 0.918-0.921g/cm
2
The processing technology of the plastic basis material film of packaging for foodstuff is: said raw material is mixed in proportion, stir; Send into extrusion machine fused mass and extrude, melt temperature is 175-195 ℃; Carry out the typing of die head blown film, die head temperature is to raise gradually from bottom to top, and its scope is controlled at 165-205 ℃; Traction cutting then; Last rolling.
The time of said stirring is 15-20min.
The rotating speed of said extruder is controlled at 80-120r/min.
The invention has the beneficial effects as follows: (1) packaging for foodstuff plastic basis material of the present invention thin-film barrier property and air-tightness are good; Have good resistance tocrocking, resistance to pressure and resistance to impact; Have heat seal strength height, characteristics that heat sealability is good simultaneously, meet the state food safety certification.(2) packaging for foodstuff plastic basis material film production process of the present invention, reasonable in design, flow process is simple, is easy to realize.(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.
The specific embodiment
Below in conjunction with specific embodiment the present invention is further explained.The manufacturing equipment of packaging for foodstuff plastic basis material film all adopts in following examples: 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 all adopts: GBL-L electronic tension tester and MXD-01 friction coefficient instrument.
With the ratio of raw material in internal layer low density polyethylene 70%, LLDPE LLDPE30%; The intermediate layer is in the ratio of low density polyethylene 40%, LLDPE LLDPE60%; Outer ratio in low density polyethylene 35%, LLDPE LLDPE65%; Mass ratio between internal layer, intermediate layer and the skin is 1:1:1 preparation raw materials for production; Stir 15-20min; Send into extrusion machine fused mass and extrude, melt temperature is 175-195 ℃, and the rotating speed of extruder is controlled at 120r/min; Carry out the typing of die head blown film, die head temperature is to raise gradually from bottom to top, and its scope is controlled at 165-195 ℃; Traction cutting then; Last rolling.The performance of products parameter of producing is: hot strength: 21.45Mpa; Elongation at break: 589.7%; Heat seal strength: 9.8; Coefficient of friction: 0.214.
The above; Be merely the preferable specific embodiment of the present invention; But protection scope of the present invention is not limited thereto; Any technical staff who is familiar with the present technique field is equal to replacement or change according to technical scheme of the present invention and inventive concept thereof in the technical scope that the present invention discloses, all should be encompassed within protection scope of the present invention.
Claims (7)
1. the plastic basis material film of a packaging for foodstuff is characterized in that, is formed by internal layer, intermediate layer and outer three-layer co-extruded blowing, includes following raw material in said internal layer, intermediate layer and the skin, LDPE low density polyethylene (LDPE) and LLDPE LLDPE.
2. the plastic basis material film of packaging for foodstuff according to claim 1 is characterized in that, LDPE and LLDPE mass ratio are 65-75:25-35 in the said internal layer; LDPE and LLDPE mass ratio are 35-45:55-65 in the said intermediate layer; LDPE and LLDPE mass ratio are 30-40:60-70 in the said skin.
3. the plastic basis material film of packaging for foodstuff according to claim 1 and 2 is characterized in that, the mass ratio between said internal layer, intermediate layer and the skin is 1:1:1.
4. the plastic basis material film of packaging for foodstuff according to claim 3 is characterized in that, the melt index of said LDPE is 1.8-2.0g/10min, and density is 0.924-0.927g/cm
2The melt index of said LLDPE is 1.9-2.2g/10min, and density is 0.918-0.921g/cm
2
5. like the processing technology of the plastic basis material film of each described packaging for foodstuff of claim 1-4, it is characterized in that processing step is: said raw material is mixed in proportion, stir; Send into extrusion machine fused mass and extrude, melt temperature is 175-195 ℃; Carry out the typing of die head blown film, die head temperature is to raise gradually from bottom to top, and its scope is controlled at 165-205 ℃; Traction cutting then; Last rolling.
6. the processing technology of the plastic basis material film of packaging for foodstuff according to claim 5 is characterized in that, the time of said stirring is 15-20min.
7. the processing technology of the plastic basis material film of packaging for foodstuff according to claim 5 is characterized in that, the rotating speed of said extruder is controlled at 80-120r/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110222941.6A CN102416747B (en) | 2011-08-05 | 2011-08-05 | Plastic substrate film for food package and processing technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110222941.6A CN102416747B (en) | 2011-08-05 | 2011-08-05 | Plastic substrate film for food package and processing technology |
Publications (2)
| Publication Number | Publication Date |
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| CN102416747A true CN102416747A (en) | 2012-04-18 |
| CN102416747B CN102416747B (en) | 2015-07-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110222941.6A Expired - Fee Related CN102416747B (en) | 2011-08-05 | 2011-08-05 | Plastic substrate film for food package and processing technology |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112092328A (en) * | 2020-05-02 | 2020-12-18 | 山东华致林医药科技有限公司 | Blown film containing method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030054085A (en) * | 2001-12-24 | 2003-07-02 | 삼성종합화학주식회사 | Linear low density polyethylene resin composition with high impact strength |
| CN1125122C (en) * | 1997-04-30 | 2003-10-22 | 三井化学株式会社 | Sealant resin composition used in disinfection film and sealant film |
| WO2004000552A1 (en) * | 2002-06-19 | 2003-12-31 | Honeywell International Inc. | High barrier antifog laminate for case ready meat packaging |
| 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 |
-
2011
- 2011-08-05 CN CN201110222941.6A patent/CN102416747B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1125122C (en) * | 1997-04-30 | 2003-10-22 | 三井化学株式会社 | Sealant resin composition used in disinfection film and sealant film |
| KR20030054085A (en) * | 2001-12-24 | 2003-07-02 | 삼성종합화학주식회사 | Linear low density polyethylene resin composition with high impact strength |
| WO2004000552A1 (en) * | 2002-06-19 | 2003-12-31 | Honeywell International Inc. | High barrier antifog laminate for case ready meat packaging |
| 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 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112092328A (en) * | 2020-05-02 | 2020-12-18 | 山东华致林医药科技有限公司 | Blown film containing method |
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| CN102416747B (en) | 2015-07-08 |
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| ASS | Succession or assignment of patent right |
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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