CN106903951B - A kind of pressure-resistant food packing composite film and preparation method thereof suitable for altitude environment - Google Patents

A kind of pressure-resistant food packing composite film and preparation method thereof suitable for altitude environment Download PDF

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Publication number
CN106903951B
CN106903951B CN201710122685.0A CN201710122685A CN106903951B CN 106903951 B CN106903951 B CN 106903951B CN 201710122685 A CN201710122685 A CN 201710122685A CN 106903951 B CN106903951 B CN 106903951B
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China
Prior art keywords
layer
raw material
hot sealing
poe elastomer
corona
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Expired - Fee Related
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CN201710122685.0A
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Chinese (zh)
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CN106903951A (en
Inventor
张小红
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Henan Haoda Plastic Ltd By Share Ltd
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Henan Haoda Plastic Ltd By Share Ltd
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Priority to CN201710122685.0A priority Critical patent/CN106903951B/en
Publication of CN106903951A publication Critical patent/CN106903951A/en
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Expired - Fee Related legal-status Critical Current
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • 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
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
    • 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
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/91—Heating, e.g. for cross linking
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/10—Polymers of propylene
    • B29K2023/12—PP, i.e. polypropylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2007/00—Flat articles, e.g. films or sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2009/00—Layered products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/24—All layers being polymeric
    • B32B2250/246—All polymers belonging to those covered by groups B32B27/32 and B32B27/30
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2439/00—Containers; Receptacles
    • B32B2439/70—Food packaging

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

Abstract

The pressure-resistant food packing composite film and preparation method thereof that the present invention relates to a kind of suitable for altitude environment, composite membrane successively include corona layer, middle layer and hot sealing layer, hot sealing layer 21-28%, middle layer 52-59% and corona layer 20%；The raw material of corona layer is that two-spot is copolymerized PP；The raw material of middle layer includes homopolymerization PP and POE elastomer, and the raw material of hot sealing layer includes ternary polymerization PP, antiblocking agent and POE elastomer.The preparation method of composite membrane: (1), raw material metering；(2), it squeezes out；(3), salivation quenching；(4), trimming is wound.Packaging composite film of the invention had both been able to satisfy the general indicator requirement of food packaging, the destructive of atm difference generation for being able to satisfy resistance to region of no relief and uplift plateau again requires, by to the selection of each layer raw material and the optimization of proportion, combination process, impact resistance and pressure-resistant performance after enhancing gas flush packaging, the leakage of the bale broken due to caused by the undesirable element in packed and transported storing process is reduced or avoided in the ratio of briquetting and packaging efficiency for improving product.

Description

A kind of pressure-resistant food packing composite film and preparation method thereof suitable for altitude environment
Technical field
The present invention relates to packaging material for food technical fields, and in particular to a kind of pressure-resistant food packet suitable for altitude environment Fill composite membrane and preparation method thereof.
Background technique
In recent years, food variety is enriched constantly, and matched packaging will also become more diverse.As gone out currently on the market Existing crisp friable food product, dilated food, easily agglomerate food, it is easily-deformable walk oil food, or have sharp corners that can puncture packaging bag Food etc. must just use vacuumizing-inflating packing.China is vast in territory, and many regions have respectively different geography and weather special Point, this just determines the different demands to packaging material.Such as in China highlands, due to unique height above sea level and plains region Air pressure forms biggish pressure difference, so also more special to packing.The influence of height above sea level and air pressure change to gas flush packaging, Substantially list 5 problems: l, rise bag；2, packaging material performance change；3, absciss layer；4, the calculating deviation of shelf-life；5, food Safety decline.
In China market existing conventional gas flush packaging only under normal pressure difference under the conditions of apply, and transport store It is also easy to produce spalling phenomenon in the process.When encounter packaging bag inside and outside differential pressure it is excessive when, be easier to occur explosion spalling phenomena such as, greatly The wholesomeness for influencing pack content, is directly related to the health of consumer, and generates huge substandard products waste.It produces After product are inflated packaging in region of no relief, when transport is to air pressure relatively low uplift plateau, since the variation of atmospheric pressure makes to pack In gas expansion, packaging bag is inflated again, sack is made bale broken occur.If reducing the aeration quantity of region of no relief, and meeting Protection cannot be received by more crisp content occur, and is crushed.
Summary of the invention
The purpose of the present invention is deficiencies to solve above-mentioned technical problem, provide a kind of pressure resistance food suitable for altitude environment Product packaging composite film, had not only been able to satisfy the general indicator requirement of food packaging, but also was able to satisfy the atmospheric pressure of resistance to region of no relief and uplift plateau The destructive requirement that difference generates.
The deficiency of the present invention to solve above-mentioned technical problem, used technical solution is: one kind being suitable for altitude environment Pressure-resistant food packing composite film, successively include corona layer, middle layer and hot sealing layer, the corona layer, middle layer and hot sealing layer Account for the mass percent of quality summation are as follows: hot sealing layer 21-28%, middle layer 52-59% and corona layer 20%；
The raw material of the corona layer is that two-spot is copolymerized PP, and the melt index which is copolymerized PP is 8g/10min, and density is 0.9g/cm3；
The raw material of the middle layer includes homopolymerization PP and POE elastomer, and the weight ratio of homopolymerization PP and POE elastomer is 9:1, The melt index of the homopolymerization PP is 8g/10min, density 0.905g/cm3, the melt index of the POE elastomer is 8g/ 10min, density 0.879g/cm3；
The raw material of the hot sealing layer includes ternary polymerization PP, antiblocking agent and POE elastomer, the melting of the ternary polymerization PP Index is 7g/10min, density 0.9g/cm3, the melt index of the POE elastomer is 8g/10min, density 0.879g/ cm3, wherein the weight percent of ternary polymerization PP is 60-70%, and the weight percent of antiblocking agent is 2-5%, POE elastomer Weight percent be 25-38%.
As a kind of advanced optimizing for pressure-resistant food packing composite film suitable for altitude environment of the invention: the heat-sealing Antiblocking agent in layer is organosilicon antiblocking agent, and the content of silica is 10% in antiblocking agent.
As a kind of advanced optimizing for pressure-resistant food packing composite film suitable for altitude environment of the invention: described compound Corona layer, middle layer and hot sealing layer account for the mass percent of quality summation in film are as follows: hot sealing layer 25%, middle layer 55% and corona Layer 20%.
A kind of preparation method of the pressure-resistant food packing composite film suitable for altitude environment, comprising the following steps:
(1), raw material measures: carry out raw material metering according to following mass percent: corona layer, middle layer and hot sealing layer account for matter Measure the mass percent of summation are as follows: hot sealing layer 21-28%, middle layer 52-59% and corona layer 20%；The raw material of corona layer is two Member copolymerization PP；The raw material of middle layer includes homopolymerization PP and POE elastomer, and the weight ratio of homopolymerization PP and POE elastomer is 9:1；Heat The raw material of sealing includes ternary polymerization PP, antiblocking agent and POE elastomer, wherein the weight percent of ternary polymerization PP is 60- 70%, the weight percent of antiblocking agent is 2-5%, and the weight percent of POE elastomer is 25-38%；
(2), it squeezes out: respectively by three extrusion machining hot sealing layers, middle layer and corona layer, in extrusion process, melt Temperature is controlled at 220-250 DEG C；
(3), salivation quenching: filtering and lamination melt in the exit of each extruder are flowed out from die lips, are formed thin And uniform sheet fluid, it is solidified into film by quenching on casting roller, curtain coating roll temperature is set as 20-30 DEG C；
(4), trimming is wound: being cut both sides edge to the film processed, and is wound.
Beneficial effect
Food packing composite film of the invention had not only been able to satisfy the general indicator requirement of food packaging, but also was able to satisfy resistance to region of no relief The destructive requirement generated with the atm difference of uplift plateau, by increasing to the selection of each layer raw material and the optimization of proportion, combination process Impact resistance and pressure-resistant performance after strong gas flush packaging, improve the ratio of briquetting and packaging efficiency of product, be reduced or avoided by The leakage of bale broken caused by undesirable element in packed and transported storing process.
Specific embodiment
Embodiment 1
A kind of preparation method of the pressure-resistant food packing composite film suitable for altitude environment, comprising the following steps:
(1), raw material measures: carry out raw material metering according to following mass percent: corona layer, middle layer and hot sealing layer account for matter Measure the mass percent of summation are as follows: hot sealing layer 21%, middle layer 59% and corona layer 20%；The raw material of corona layer is two-spot copolymerization PP；The raw material of middle layer includes homopolymerization PP and POE elastomer, and the weight ratio of homopolymerization PP and POE elastomer is 9:1；Hot sealing layer Raw material includes ternary polymerization PP, antiblocking agent and POE elastomer, wherein the weight percent of ternary polymerization PP is 60%, anti-stick It is 38% that even the weight percent of agent, which is the weight percent of 2%, POE elastomer,.
(2), it squeezes out: machining hot sealing layer, middle layer and corona layer by three extrusions respectively；
(3), salivation quenching: filtering and lamination melt in the exit of each extruder are flowed out from die lips, are formed thin And uniform sheet fluid, film is solidified by quenching in chill roll；
(4), trimming is wound: being cut both sides edge to the film processed, and is wound.
Embodiment 2
A kind of preparation method of the pressure-resistant food packing composite film suitable for altitude environment, comprising the following steps:
(1), raw material measures: carry out raw material metering according to following mass percent: corona layer, middle layer and hot sealing layer account for matter Measure the mass percent of summation are as follows: hot sealing layer 28%, middle layer 52% and corona layer 20%；The raw material of corona layer is two-spot copolymerization PP；The raw material of middle layer includes homopolymerization PP and POE elastomer, and the weight ratio of homopolymerization PP and POE elastomer is 9:1；Hot sealing layer Raw material includes ternary polymerization PP, antiblocking agent and POE elastomer, wherein the weight percent of ternary polymerization PP is 70%, anti-stick It is 25% that even the weight percent of agent, which is the weight percent of 5%, POE elastomer,.
(2), it squeezes out: machining hot sealing layer, middle layer and corona layer by three extrusions respectively；
(3), salivation quenching: filtering and lamination melt in the exit of each extruder are flowed out from die lips, are formed thin And uniform sheet fluid, film is solidified by quenching in chill roll；
(4), trimming is wound: being cut both sides edge to the film processed, and is wound.
Embodiment 3
A kind of preparation method of the pressure-resistant food packing composite film suitable for altitude environment, comprising the following steps:
(1), raw material measures: carry out raw material metering according to following mass percent: corona layer, middle layer and hot sealing layer account for matter Measure the mass percent of summation are as follows: hot sealing layer 25%, middle layer 55% and corona layer 20%；The raw material of corona layer is two-spot copolymerization PP；The raw material of middle layer includes homopolymerization PP and POE elastomer, and the weight ratio of homopolymerization PP and POE elastomer is 9:1；Hot sealing layer Raw material includes ternary polymerization PP, antiblocking agent and POE elastomer, wherein the weight percent of ternary polymerization PP is 65%, anti-stick It is 35% that even the weight percent of agent, which is the weight percent of 5%, POE elastomer,.
(2), it squeezes out: machining hot sealing layer, middle layer and corona layer by three extrusions respectively；
(3), salivation quenching: filtering and lamination melt in the exit of each extruder are flowed out from die lips, are formed thin And uniform sheet fluid, film is solidified by quenching in chill roll；
(4), trimming is wound: being cut both sides edge to the film processed, and is wound.
Detection data
Film sample (film thickness 25um) made from Example 1-3 carries out falling mark impact strength, the resistance to pressure of sealing The detection of degree and broken rate.
By upper table testing result it is found that food packing composite film compressive resistance of the invention can reach 0.52bar or more, fall Mark impact strength be greater than 95g, broken rate can be controlled in 0.02% hereinafter,
Not only it had been able to satisfy the general indicator requirement of food packaging, but also has been able to satisfy the atm difference generation of resistance to region of no relief and uplift plateau Destructive require.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously Limitations on the scope of the patent of the present invention therefore cannot be interpreted as.It should be pointed out that for those of ordinary skill in the art For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to guarantor of the invention Protect range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.

Claims (2)

1. a kind of pressure-resistant food packing composite film suitable for altitude environment, it is characterised in that: successively include corona layer, middle layer And hot sealing layer, the corona layer, middle layer and hot sealing layer account for the mass percent of three's mass summation are as follows: hot sealing layer 25%, centre Layer 55% and corona layer 20%；
The raw material of the corona layer is that two-spot is copolymerized PP, and the melt index which is copolymerized PP is 8g/10min, density 0.9g/ cm3；
The raw material of the middle layer includes homopolymerization PP and POE elastomer, and the weight ratio of homopolymerization PP and POE elastomer is 9:1, this is The melt index of poly- PP is 8g/10min, and density 0.905g/cm3, the melt index of the POE elastomer is 8g/10min, close Degree is 0.879g/cm3；
The raw material of the hot sealing layer includes ternary polymerization PP, antiblocking agent and POE elastomer, the melt index of the ternary polymerization PP For 7g/10min, density 0.9g/cm3, the melt index of the POE elastomer is 8g/10min, density 0.879g/cm3, In, the weight percent of ternary polymerization PP is 60-70%, and the weight percent of antiblocking agent is 2-5%, the weight of POE elastomer Percentage is 25-38%, and antiblocking agent is organosilicon antiblocking agent, and the content of silica is 10% in antiblocking agent.
2. a kind of preparation method of the pressure-resistant food packing composite film suitable for altitude environment as described in claim 1, feature It is: the following steps are included:
(1), raw material measures: carry out raw material metering according to following mass percent: corona layer, middle layer and hot sealing layer account for three's matter Measure the mass percent of summation are as follows: hot sealing layer 25%, middle layer 55% and corona layer 20%；The raw material of corona layer is two-spot copolymerization PP；The raw material of middle layer includes homopolymerization PP and POE elastomer, and the weight ratio of homopolymerization PP and POE elastomer is 9:1；Hot sealing layer Raw material includes ternary polymerization PP, antiblocking agent and POE elastomer, wherein the weight percent of ternary polymerization PP is 60-70%, is resisted The weight percent of adhesion agent is 2-5%, and the weight percent of POE elastomer is 25-38%；
(2), it squeezes out: respectively by three extrusion machining hot sealing layers, middle layer and corona layer, in extrusion process, melt temperature Control is at 220-250 DEG C；
(3), curtain coating quenching: filtering and lamination melt in the exit of each extruder flow out from die lips, form Bao Erjun Even sheet fluid, is solidified into film by quenching on casting roller, and curtain coating roll temperature is set as 20-30 DEG C；
(4), trimming is wound: being cut both sides edge to the film processed, and is wound.
CN201710122685.0A 2017-03-03 2017-03-03 A kind of pressure-resistant food packing composite film and preparation method thereof suitable for altitude environment Expired - Fee Related CN106903951B (en)

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CN112480481A (en) * 2020-11-24 2021-03-12 杭州金焱包装彩印有限公司 Pressure-resistant food packaging composite film for plateau environment and preparation method thereof

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101966891A (en) * 2010-10-25 2011-02-09 黄山永新股份有限公司 Casting polypropylene (CPP) membrane for paper packaging and preparation method thereof
CN102501526A (en) * 2011-11-04 2012-06-20 任丘市京开塑业有限公司 Cast polypropylene heavy packaging film
CN103085415A (en) * 2011-05-18 2013-05-08 浙江众成包装材料股份有限公司 Packaging polyolefin film and preparation method thereof

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2195161B2 (en) * 2007-09-28 2021-07-28 Toray, Plastics (America), Inc. Biaxially oriented polypropylene film with high heat seal strength

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101966891A (en) * 2010-10-25 2011-02-09 黄山永新股份有限公司 Casting polypropylene (CPP) membrane for paper packaging and preparation method thereof
CN103085415A (en) * 2011-05-18 2013-05-08 浙江众成包装材料股份有限公司 Packaging polyolefin film and preparation method thereof
CN102501526A (en) * 2011-11-04 2012-06-20 任丘市京开塑业有限公司 Cast polypropylene heavy packaging film

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Granted publication date: 20190326