CN110154478A - A kind of transparent milk packaging film and preparation method thereof - Google Patents

A kind of transparent milk packaging film and preparation method thereof Download PDF

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Publication number
CN110154478A
CN110154478A CN201910500570.XA CN201910500570A CN110154478A CN 110154478 A CN110154478 A CN 110154478A CN 201910500570 A CN201910500570 A CN 201910500570A CN 110154478 A CN110154478 A CN 110154478A
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China
Prior art keywords
parts
packaging film
milk packaging
transparent milk
weight
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Granted
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CN201910500570.XA
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Chinese (zh)
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CN110154478B (en
Inventor
黄作团
黄家辉
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Fujian Fuyijin Technology Co Ltd
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Fujian Fuyijin Technology Co Ltd
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    • 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
    • B29C48/07—Flat, e.g. panels
    • B29C48/08—Flat, e.g. panels flexible, e.g. films
    • 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
    • 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
    • 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
    • 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
    • B32B27/327—Layered products comprising a layer of synthetic resin comprising polyolefins comprising polyolefins obtained by a metallocene or single-site catalyst
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
    • B65D65/38—Packaging materials of special type or form
    • B65D65/40—Applications of laminates for particular packaging purposes
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/412—Transparent
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/71—Resistive to light or to UV
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/724—Permeability to gases, adsorption
    • B32B2307/7242—Non-permeable
    • B32B2307/7244—Oxygen barrier
    • 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

Abstract

The present invention relates to a kind of transparent milk packaging films and preparation method thereof, the transparent milk packaging film is made of the internal layer, sandwich layer and surface layer stacked gradually, the internal layer includes following each component in parts by weight: 8-15 parts of hp-ldpe, 13-20 parts of metallocene PE；The sandwich layer includes following each component in parts by weight: 30-40 parts of linear low density polyethylene, 10-17 parts of polypropylene；The surface layer includes following each component in parts by weight: 15-23 parts of super high molecular weight high density polyethylene (HDPE), 0.5-3 parts of antioxidant, 0.1-3 parts of aromatic.Transparent milk packaging film of the present invention can be used for the packaging of the food such as milk, and consumer can be immediately seen the appearance of food product inside, while can also obstruct ultraviolet light, reduces oxygen through packaging film and aoxidizes food, has fresh-keeping effect.

Description

A kind of transparent milk packaging film and preparation method thereof
Technical field
The present invention relates to PE to pack field of membrane preparation, especially a kind of transparent milk packaging film and preparation method thereof.
Background technique
Existing milk packaging film is mostly black and white milk film, and this material joined black and white color masterbatch, black and white in production Color masterbatch small molecular substance can be precipitated to a certain extent, and cause adverse effect to the quality and mouthfeel of food.Meanwhile it wrapping Dress film to be protected from light performance, antioxygenic property and fresh-keeping effect general.
Patent application CN101306743A discloses a kind of milk packaging film, be by outer membrane by adhesive phase with it is interior Layer film is linked together and the composite membrane that forms, and the outer membrane is polyvinylidene chloride film, and adhesive is single, double group One of which in part polyurethane-type solvent or adhesive for solvent-free use, the film of inside are black and white polyethylene film.It manufactures this Milk packaging film is first to be heat-treated the heated device of outer layer polyvinylidene chloride film, then place it on compounding machine On unreeling shaft, then film carries out adhesive coating through unreeling machine, and by flattening, tension force, the adjustment of edge guide device, It is made again with the internal layer membrane by flattening, tension force, edge guide device of complex method.Inside film in the program For black and white polyethylene film, however it remains black and white masterbatch small molecular dissolves out problem.
Summary of the invention
Problem to be solved by this invention is to overcome the shortcomings of the prior art, provides a kind of transparent milk packaging film, Without containing traditional black and white masterbatch, transparent membrane is made using safe material, convenient for observation food appearance, while also being had fresh-keeping Function.
The present invention also provides the preparation methods of the transparent milk packaging film, raw using three-layer co-extruded equipment blow molding Produce at low cost, operation is succinct.
Concrete scheme is as follows:
A kind of transparent milk packaging film, the transparent milk packaging film are made of the internal layer, sandwich layer and surface layer stacked gradually, The internal layer includes following each component in parts by weight: 8-15 parts of hp-ldpe, metallocene PE 13-20 Part；The sandwich layer includes following each component in parts by weight: 30-40 parts of linear low density polyethylene, 10-17 parts of polypropylene； The surface layer includes following each component in parts by weight: 15-23 parts of super high molecular weight high density polyethylene (HDPE), antioxidant 0.5-3 Part, 0.1-3 parts of aromatic.
Further, the internal layer includes following each component in parts by weight: 10-12 parts of hp-ldpe, 16-19 parts of metallocene PE.
Further, the sandwich layer includes following each component in parts by weight: 35-38 parts of linear low density polyethylene, 11-13 parts of polypropylene.
Further, the surface layer includes following each component in parts by weight: super high molecular weight high density polyethylene (HDPE) 18- 21 parts, 1-2 parts of antioxidant, 0.5-2 parts of aromatic.
Further, the model 2426H of the hp-ldpe.
Further, the density of the linear low density polyethylene is 0.916-0.918g/cm3, melt index 0.8- 0.9g/10min。
Further, the polypropylene is isotactic polypropylene, and isotacticity is not less than 90%.
Further, the aromatic is food-grade fragrance auxiliary agent.
Further, the super high molecular weight high density polyethylene (HDPE) molecular weight is 13-16 ten thousand, density 0.945- 0.950g/cm3。
The present invention also provides the preparation methods of the transparent milk packaging film, comprising the following steps:
Step 1: each raw material is weighed according to the parts by weight, according to internal layer, the respective formula of sandwich layer and surface layer by each original Material mixing, respectively obtains internal layer mixing, sandwich layer mixing and surface layer mixing；
Step 2: internal layer mixing, sandwich layer mixing and surface layer mixing being separately added into three hoppers of extruder, carry out three Layer coextrusion film blowing processing, obtains film；
Step 3: by film cooling, winding, obtaining the transparent milk packaging film.
Further, the temperature of extruder is 150-170 DEG C in step 2.
The utility model has the advantages that transparent milk packaging film of the present invention, using hp-ldpe and metallocene PE The internal layer of composition has transparent effect, facilitates the appearance of observation internal product.The preferred model of hp-ldpe The high pressure polyethylene of 2426H, it is preferable with the compatibility of metallocene PE, it is easy to blown film, avoids generating crystal point.
Further, transparent milk packaging film of the present invention further includes sandwich layer, by linear low density polyethylene and poly- third Alkene compounding composition, can enhance the mechanical strength of packaging film, it is preferable that linear low density polyethylene is 30-40 parts, and polypropylene is 10-17 parts, film has under light advantage at this time, in turn ensures enough mechanical strengths.
Finally, transparent milk packaging film outer layer of the present invention also contains aromatic, preferably food-grade fragrance auxiliary agent, to ox Milk quality mouthfeel not will cause adverse effect.
In short, transparent milk packaging film of the present invention can be used for the packaging of the food such as milk, consumer can be immediately seen The appearance of food product inside, while ultraviolet light can also be obstructed, oxygen is reduced through packaging film and aoxidizes food, and there is fresh-keeping effect.It should Transparent milk packaging film is prepared using conventional three-layer co-extruded film-blowing process, and 150-170 DEG C of forming temperature, to guarantee preferably Crystallinity and transparency, operation is succinct, popularization easy to produce.
Specific embodiment
Technical solution of the present invention is further elaborated below with reference to embodiment.Particular technique or item are not specified in embodiment Part person described technology or conditions or carries out according to the literature in the art according to product description.Agents useful for same or instrument Production firm person is not specified in device, and being can be with conventional products that are commercially available.
The model 2426H of embodiment mesohigh low density polyethylene (LDPE).The density of linear low density polyethylene is 0.916- 0.918g/cm3, melt index 0.8-0.9g/10min.Polypropylene is isotactic polypropylene, and isotacticity is not less than 90%.Superelevation High molecular weight high density polyethylene molecular weight is 13-16 ten thousand, density 0.945-0.950g/cm3.Antioxidant is hindered phenol type antioxygen Agent, such as antioxidant 1010 or 1076.Aromatic is essence.
Embodiment 1
Prepare transparent milk packaging film, comprising the following steps:
Step 1: each raw material is weighed according to table 1, mixes each raw material according to internal layer, the respective formula of sandwich layer and surface layer, point Internal layer mixing, sandwich layer mixing and surface layer mixing are not obtained；
Step 2: internal layer mixing, sandwich layer mixing and surface layer mixing being separately added into three hoppers of extruder, carry out three Layer coextrusion film blowing processing, wherein the temperature of extruder is 150 DEG C, obtains film, with a thickness of 0.05mm, wherein internal layer 0.01mm, Sandwich layer 0.03mm, surface layer 0.01mm；
Step 3: by film cooling, winding, obtaining transparent milk packaging film.
The transparent milk packaging film can make the visible directly milk of consumer whether xanthochromia, if having agglomeration, allow consumer Trust purchase.Meanwhile product has barrier action, OTR oxygen transmission rate in 400nm ultraviolet light below to wavelength are as follows: (23 DEG C, 50%RH) 3.68cm3/m20.1Mpa for 24 hours has the function of anti-oxidant and fresh-keeping.
1 raw material dosage table of table/parts by weight
Embodiment 2
Transparent milk packaging film is prepared, each raw material dosage is shown in Table 1, and with embodiment 1, difference is to squeeze in step 2 method The temperature of machine is 155 DEG C out.
The transparent milk packaging film can make the visible directly milk of consumer whether xanthochromia, if having agglomeration, allow consumer Trust purchase.Meanwhile product has barrier action, OTR oxygen transmission rate in 400nm ultraviolet light below to wavelength are as follows: (23 DEG C, 50%RH) 3.60cm3/m20.1Mpa for 24 hours has the function of anti-oxidant and fresh-keeping.
Embodiment 3
Transparent milk packaging film is prepared, each raw material dosage is shown in Table 1, and with embodiment 1, difference is to squeeze in step 2 method The temperature of machine is 160 DEG C out.
The transparent milk packaging film can make the visible directly milk of consumer whether xanthochromia, if having agglomeration, allow consumer Trust purchase.Meanwhile product has barrier action, OTR oxygen transmission rate in 400nm ultraviolet light below to wavelength are as follows: (23 DEG C, 50%RH) 3.53cm3/m20.1Mpa for 24 hours has the function of anti-oxidant and fresh-keeping.
Embodiment 4
Transparent milk packaging film is prepared, each raw material dosage is shown in Table 1, and with embodiment 1, difference is to squeeze in step 2 method The temperature of machine is 160 DEG C out.
The transparent milk packaging film can make the visible directly milk of consumer whether xanthochromia, if having agglomeration, allow consumer Trust purchase.Meanwhile product has barrier action, OTR oxygen transmission rate in 400nm ultraviolet light below to wavelength are as follows: (23 DEG C, 50%RH) 3.55cm3/m20.1Mpa for 24 hours has the function of anti-oxidant and fresh-keeping.
Embodiment 5
Transparent milk packaging film is prepared, each raw material dosage is shown in Table 1, and with embodiment 1, difference is to squeeze in step 2 method The temperature of machine is 165 DEG C out.
The transparent milk packaging film can make the visible directly milk of consumer whether xanthochromia, if having agglomeration, allow consumer Trust purchase.Meanwhile product has barrier action, OTR oxygen transmission rate in 400nm ultraviolet light below to wavelength are as follows: (23 DEG C, 50%RH) 3.63cm3/m20.1Mpa for 24 hours has the function of anti-oxidant and fresh-keeping.
Embodiment 6
Transparent milk packaging film is prepared, each raw material dosage is shown in Table 1, and with embodiment 1, difference is to squeeze in step 2 method The temperature of machine is 170 DEG C out.
The transparent milk packaging film can make the visible directly milk of consumer whether xanthochromia, if having agglomeration, allow consumer Trust purchase.Meanwhile product has barrier action, OTR oxygen transmission rate in 400nm ultraviolet light below to wavelength are as follows: (23 DEG C, 50%RH) 3.70cm3/m20.1Mpa for 24 hours has the function of anti-oxidant and fresh-keeping.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example Property, it is not considered as limiting the invention, those skilled in the art are not departing from the principle of the present invention and objective In the case where can make changes, modifications, alterations, and variations to the above described embodiments within the scope of the invention.

Claims (10)

1. a kind of transparent milk packaging film, it is characterised in that: the transparent milk packaging film by stack gradually internal layer, sandwich layer and Surface layer composition, the internal layer includes following each component in parts by weight: 8-15 parts of hp-ldpe, the poly- second of metallocene 13-20 parts of alkene；The sandwich layer includes following each component in parts by weight: 30-40 parts of linear low density polyethylene, polypropylene 10-17 parts；The surface layer includes following each component in parts by weight: 15-23 parts of super high molecular weight high density polyethylene (HDPE), antioxygen 0.5-3 parts of agent, 0.1-3 parts of aromatic.
2. transparent milk packaging film according to claim 1, it is characterised in that: the internal layer include in parts by weight with Lower each component: 10-12 parts of hp-ldpe, 16-19 parts of metallocene PE.
3. transparent milk packaging film according to claim 1, it is characterised in that: the sandwich layer include in parts by weight with Lower each component: 35-38 parts of linear low density polyethylene, 11-13 parts of polypropylene.
4. transparent milk packaging film according to claim 1, it is characterised in that: the surface layer include in parts by weight with Lower each component: 18-21 parts of super high molecular weight high density polyethylene (HDPE), 1-2 parts of antioxidant, 0.5-2 parts of aromatic.
5. transparent milk packaging film described in any one of -4 according to claim 1, it is characterised in that: the high pressure low density is poly- The model 2426H of ethylene.
6. transparent milk packaging film described in any one of -4 according to claim 1, it is characterised in that: the linea low density is poly- The density of ethylene is 0.916-0.918g/cm3, melt index 0.8-0.9g/10min.
7. transparent milk packaging film described in any one of -4 according to claim 1, it is characterised in that: the polypropylene is isotactic Polypropylene, isotacticity are not less than 90%；
Optional, the aromatic is food-grade fragrance auxiliary agent.
8. transparent milk packaging film described in any one of -4 according to claim 1, it is characterised in that: the super high molecular weight is high Density polyethylene molecular weight is 13-16 ten thousand, density 0.945-0.950g/cm3。
9. a kind of preparation method of transparent milk packaging film of any of claims 1-8, it is characterised in that: including with Lower step:
Step 1: weighing each raw material according to the described in any item parts by weight of claim 1-8, respectively according to internal layer, sandwich layer and surface layer Formula each raw material is mixed, respectively obtain internal layer mixing, sandwich layer mixing and surface layer mixing；
Step 2: internal layer mixing, sandwich layer mixing and surface layer mixing being separately added into three hoppers of extruder, carry out three layers altogether Extrusion blow film process, obtains film；
Step 3: by film cooling, winding, obtaining the transparent milk packaging film.
10. the preparation method of transparent milk packaging film according to claim 9, it is characterised in that: extruder in step 2 Temperature is 150-170 DEG C.
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CN111469511A (en) * 2020-03-26 2020-07-31 广东宝佳利绿印股份有限公司 Composite high-strength washing powder packaging bag
CN112848575A (en) * 2019-11-26 2021-05-28 广州市同源塑料制品有限公司 Novel high-temperature-resistant creep-resistant blown film formula and processing technology thereof

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CN106808770A (en) * 2017-01-04 2017-06-09 江苏百瑞尔包装材料有限公司 A kind of transparent milk packaging film
CN108790352A (en) * 2018-06-12 2018-11-13 黄山永新股份有限公司 A kind of transparent packaging film and preparation method thereof
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CN112848575A (en) * 2019-11-26 2021-05-28 广州市同源塑料制品有限公司 Novel high-temperature-resistant creep-resistant blown film formula and processing technology thereof
CN111469511A (en) * 2020-03-26 2020-07-31 广东宝佳利绿印股份有限公司 Composite high-strength washing powder packaging bag

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