CN102380997A - Plastic substrate film for food packing and machining process thereof - Google Patents

Plastic substrate film for food packing and machining process thereof Download PDF

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Publication number
CN102380997A
CN102380997A CN2011102229685A CN201110222968A CN102380997A CN 102380997 A CN102380997 A CN 102380997A CN 2011102229685 A CN2011102229685 A CN 2011102229685A CN 201110222968 A CN201110222968 A CN 201110222968A CN 102380997 A CN102380997 A CN 102380997A
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CN
China
Prior art keywords
lldpe
ldpe
10min
packaging
melt index
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN2011102229685A
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Chinese (zh)
Inventor
梁继鹏
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dalian Ruixianda Plastic Co., Ltd.
Original Assignee
DALIAN FANGSHENG PLASTIC Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by DALIAN FANGSHENG PLASTIC Co Ltd filed Critical DALIAN FANGSHENG PLASTIC Co Ltd
Priority to CN2011102229685A priority Critical patent/CN102380997A/en
Publication of CN102380997A publication Critical patent/CN102380997A/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/92—Measuring, controlling or regulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92704—Temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/92857—Extrusion unit
    • B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
    • B29C2948/92895—Barrel or housing

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Wrappers (AREA)

Abstract

The invention discloses a plastic substrate film for food packing. The plastic substrate film is formed by performing coextruding and blow molding on an inner layer, a middle layer and an outer layer, wherein the inner layer is made from low-density polyethylene (LDPE), linear low-density polyethylene (LLDPE) and metallocene linear low-density polyethylene (mLLDPE); and both the middle layer and the outer layer are made from LDPE and LLDPE. The plastic substrate film for food packing has the characteristics of high barrier property, high airtightness, high pollution resistance, pressure resistance, impact resistance, high heat-sealing strength and high heat-sealing performance, and is accordant with the national food safety certification.

Description

A kind of plastic basis material film and processing technology thereof of packaging for foodstuff
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; Said internal layer raw material comprises LDPE low density polyethylene (LDPE), LLDPE LLDPE and mLLDPE metallocene linear-low density polyethylene, and said intermediate layer and outer raw material are LDPE low density polyethylene (LDPE) and LLDPE LLDPE.
The mass ratio of LDPE, LLDPE and mLLDPE is 25-35:15-25:45-55 in the said internal layer, and wherein the melt index of LDPE is 1.8-2.2g/10min, and density is 0.923-0.926g/cm 2The melt index of LLDPE is 1.9-2.2g/10min, and density is 0.918-0.922g/cm 2The melt index of mLLDPE is 1.9-2.4g/10min, and density is 0.910-0.915g/cm 2
LDPE, LLDPE mass ratio are 35-45:55-65 in the said intermediate layer, and wherein the melt index of LDPE is 1.8-2.2g/10min, and density is 0.923-0.926g/cm 2The melt index of LLDPE is 1.9-2.2g/10min, and density is 0.918-0.922g/cm 2
The mass ratio of LDPE and LLDPE is 35-45:55-65 in the said skin, and wherein the melt index of LDPE is 0.8-2.1g/10min, and density is 0.923-0.926g/cm 2The melt index of LLDPE is 1.9-2.2g/10min, and density is 0.918-0.922g/cm 2
Mass ratio between said internal layer, intermediate layer and the skin is 1:1:1.
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 30%, LLDPE LLDPE20%, metallocene linear polyethylene mLLDPE50%; The intermediate layer is in the ratio of low density polyethylene 40%, LLDPE LLDPE60%; Outer ratio in low density polyethylene 40%, LLDPE LLDPE60%; 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: 22.17Mpa; Elongation at break: 570.85%; Heat seal strength: 9.8; Coefficient of friction: 0.209.
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 (6)

1. the plastic basis material film of a packaging for foodstuff; It is characterized in that; Form by internal layer, intermediate layer and outer three-layer co-extruded blowing; Said internal layer raw material comprises LDPE low density polyethylene (LDPE), LLDPE LLDPE and mLLDPE metallocene linear-low density polyethylene, and said intermediate layer and outer raw material are 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,
The mass ratio of LDPE, LLDPE and mLLDPE is 25-35:15-25:45-55 in the said internal layer, and wherein the melt index of LDPE is 1.8-2.2g/10min, and density is 0.923-0.926g/cm 2The melt index of LLDPE is 1.9-2.2g/10min, and density is 0.918-0.922g/cm 2The melt index of mLLDPE is 1.9-2.4g/10min, and density is 0.910-0.915g/cm 2
LDPE, LLDPE mass ratio are 35-45:55-65 in the said intermediate layer, and wherein the melt index of LDPE is 1.8-2.2g/10min, and density is 0.923-0.926g/cm 2The melt index of LLDPE is 1.9-2.2g/10min, and density is 0.918-0.922g/cm 2
The mass ratio of LDPE and LLDPE is 35-45:55-65 in the said skin, and wherein the melt index of LDPE is 0.8-2.1g/10min, and density is 0.923-0.926g/cm 2The melt index of LLDPE is 1.9-2.2g/10min, and density is 0.918-0.922g/cm 2
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. like the processing technology of the plastic basis material film of each described packaging for foodstuff of claim 1-3, 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.
5. the processing technology of the plastic basis material film of packaging for foodstuff according to claim 4 is characterized in that, the time of said stirring is 15-20min.
6. the processing technology of the plastic basis material film of packaging for foodstuff according to claim 4 is characterized in that, the rotating speed of said extruder is controlled at 80-120r/min.
CN2011102229685A 2011-08-05 2011-08-05 Plastic substrate film for food packing and machining process thereof Pending CN102380997A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011102229685A CN102380997A (en) 2011-08-05 2011-08-05 Plastic substrate film for food packing and machining process thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011102229685A CN102380997A (en) 2011-08-05 2011-08-05 Plastic substrate film for food packing and machining process thereof

Publications (1)

Publication Number Publication Date
CN102380997A true CN102380997A (en) 2012-03-21

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Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103112158A (en) * 2013-01-31 2013-05-22 石家庄中汇药品包装有限公司 Preparation method for polyethylene film dissolved out by low-normal hexane
CN103879112A (en) * 2014-02-26 2014-06-25 成都市兴恒泰印务有限公司 Polyethylene film for plastic compound flexible package and blow molding method thereof
CN104768754A (en) * 2012-09-13 2015-07-08 陶氏环球技术有限公司 Polyolefin based films suitable for thermoforming
CN106739329A (en) * 2016-11-16 2017-05-31 东莞市博晨塑料科技有限公司 A kind of novel multi-layer co-extrusion graining film and preparation method thereof
CN107745561A (en) * 2017-09-30 2018-03-02 黄山永新股份有限公司 A kind of scissile nylon EVOH high-resistant diaphragms and its production method
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
CN108099148A (en) * 2017-12-05 2018-06-01 聚石化学（长沙）有限公司 The ventilated membrane and its production technology of a kind of property
CN108995995A (en) * 2018-07-07 2018-12-14 青岛金利塑料有限公司 A kind of high-air-tightness hydraulic pressure resistant polybag and preparation method thereof
CN109093978A (en) * 2018-06-19 2018-12-28 宁波鸿雁包装材料有限公司 A kind of film and its production method of high draw ratio
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
CN110154477A (en) * 2019-06-11 2019-08-23 福建富一锦科技有限公司 A kind of PE bag in box film and preparation method thereof
CN110202886A (en) * 2019-07-04 2019-09-06 河南耐可达彩色印刷有限公司 A kind of low-temperature polyethylene film
CN111546733A (en) * 2020-04-27 2020-08-18 黄山永新股份有限公司 PE blown film, PE composite film, packaging bag and preparation method of packaging bag
CN111775526A (en) * 2020-06-19 2020-10-16 重庆嘉峰彩印有限公司 High-temperature water-boiling PE film and preparation method and application thereof
CN112552577A (en) * 2020-12-15 2021-03-26 石家庄育才药用包装材料股份有限公司 Polyethylene medicinal package
CN114889274A (en) * 2022-04-06 2022-08-12 珠海市德燊环保包装有限公司 Powder-free PE film for food packaging and preparation method thereof
CN116252534A (en) * 2023-02-28 2023-06-13 中天科盛科技股份有限公司 High-load FFS packaging film and preparation method thereof

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CN1198449A (en) * 1997-04-30 1998-11-11 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
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

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1198449A (en) * 1997-04-30 1998-11-11 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
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 (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104768754A (en) * 2012-09-13 2015-07-08 陶氏环球技术有限公司 Polyolefin based films suitable for thermoforming
US11292234B2 (en) 2012-09-13 2022-04-05 Dow Global Technologies Llc Polyolefin based films suitable for thermoforming
CN110239176A (en) * 2012-09-13 2019-09-17 陶氏环球技术有限公司 Suitable for hot formed polyolefin base membrane
CN103112158A (en) * 2013-01-31 2013-05-22 石家庄中汇药品包装有限公司 Preparation method for polyethylene film dissolved out by low-normal hexane
CN103112158B (en) * 2013-01-31 2016-01-20 石家庄中汇药品包装有限公司 A kind of preparation method of low n-hexane stripping polyethylene film
CN103879112A (en) * 2014-02-26 2014-06-25 成都市兴恒泰印务有限公司 Polyethylene film for plastic compound flexible package and blow molding method thereof
CN106739329A (en) * 2016-11-16 2017-05-31 东莞市博晨塑料科技有限公司 A kind of novel multi-layer co-extrusion graining film and preparation method thereof
CN106739329B (en) * 2016-11-16 2019-09-10 东莞市博晨塑料科技有限公司 Multi-layer co-extruded embossing film of one kind and preparation method thereof
CN107745561A (en) * 2017-09-30 2018-03-02 黄山永新股份有限公司 A kind of scissile nylon EVOH high-resistant diaphragms and its production method
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
CN108099148A (en) * 2017-12-05 2018-06-01 聚石化学（长沙）有限公司 The ventilated membrane and its production technology of a kind of property
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
CN109093978A (en) * 2018-06-19 2018-12-28 宁波鸿雁包装材料有限公司 A kind of film and its production method of high draw ratio
CN109093978B (en) * 2018-06-19 2020-09-15 宁波鸿雁包装材料有限公司 High-stretch-ratio film and production method thereof
CN108995995A (en) * 2018-07-07 2018-12-14 青岛金利塑料有限公司 A kind of high-air-tightness hydraulic pressure resistant polybag and preparation method thereof
CN110154477A (en) * 2019-06-11 2019-08-23 福建富一锦科技有限公司 A kind of PE bag in box film and preparation method thereof
CN110154477B (en) * 2019-06-11 2022-01-18 福建富一锦科技有限公司 PE bag-in-box film and preparation method thereof
CN110202886A (en) * 2019-07-04 2019-09-06 河南耐可达彩色印刷有限公司 A kind of low-temperature polyethylene film
CN111546733A (en) * 2020-04-27 2020-08-18 黄山永新股份有限公司 PE blown film, PE composite film, packaging bag and preparation method of packaging bag
CN111775526A (en) * 2020-06-19 2020-10-16 重庆嘉峰彩印有限公司 High-temperature water-boiling PE film and preparation method and application thereof
CN112552577A (en) * 2020-12-15 2021-03-26 石家庄育才药用包装材料股份有限公司 Polyethylene medicinal package
CN112552577B (en) * 2020-12-15 2022-06-17 石家庄育才药用包装材料股份有限公司 Polyethylene medicinal package
CN114889274A (en) * 2022-04-06 2022-08-12 珠海市德燊环保包装有限公司 Powder-free PE film for food packaging and preparation method thereof
CN116252534A (en) * 2023-02-28 2023-06-13 中天科盛科技股份有限公司 High-load FFS packaging film and preparation method thereof
CN116252534B (en) * 2023-02-28 2024-04-26 中天科盛科技股份有限公司 High-load FFS packaging film and preparation method thereof

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Application publication date: 20120321