CN109291570A - A kind of polystyrene modeling cup sealed membrane and preparation method thereof for post-fermentation Yoghourt - Google Patents

A kind of polystyrene modeling cup sealed membrane and preparation method thereof for post-fermentation Yoghourt Download PDF

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Publication number
CN109291570A
CN109291570A CN201811216704.7A CN201811216704A CN109291570A CN 109291570 A CN109291570 A CN 109291570A CN 201811216704 A CN201811216704 A CN 201811216704A CN 109291570 A CN109291570 A CN 109291570A
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China
Prior art keywords
layer
polyethylene
sealed membrane
printing
low density
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CN201811216704.7A
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Chinese (zh)
Inventor
曾文明
计峰
吉娟
李晓波
薛婧
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ZHEJIANG GOLDSTONE PACKING CO Ltd
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ZHEJIANG GOLDSTONE PACKING CO Ltd
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Priority to CN201811216704.7A priority Critical patent/CN109291570A/en
Publication of CN109291570A publication Critical patent/CN109291570A/en
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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
    • B29C69/00—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
    • 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
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal 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
    • B32B15/085—Layered products comprising a layer of metal comprising metal 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 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
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal 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
    • B32B15/09—Layered products comprising a layer of metal comprising metal 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 comprising polyesters
    • 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
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
    • 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
    • B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
    • 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
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/308—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising acrylic (co)polymers
    • 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
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • 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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
    • 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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
    • 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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • 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
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/14—Printing or colouring
    • B32B38/145—Printing
    • 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
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/02—Physical, chemical or physicochemical properties
    • 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
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • 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
    • B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
    • B65D77/10—Container closures formed after filling
    • B65D77/20—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers
    • 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
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/31—Heat sealable
    • 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
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/558—Impact strength, toughness
    • 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
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/582—Tearability

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Laminated Bodies (AREA)

Abstract

The invention belongs to composite membrane technology fields, disclose a kind of polystyrene modeling cup sealed membrane and preparation method thereof for post-fermentation Yoghourt, the sealed membrane includes the printing layer set gradually from top to bottom, barrier layer and hot sealing layer, the printing layer is PET laminated polyester film, the barrier layer is aluminium foil layer, the hot sealing layer includes the component of following parts by weight: 30~35 parts of low density polyethylene (LDPE), 25~30 parts of linear low density polyethylene, 15~20 parts of ethylene-methacrylic acid copolymer, 15~20 parts of ethene-vinyl acetate copolymer, the hot sealing layer includes the component of special ratios, wherein, the linear low density polyethylene has good environmental stress crack resistance, the performances such as stronger impact resistant strength and tearing toughness, it can be well adapted for the heat that post-fermentation Yoghourt generates during the fermentation And surge brought by gas etc., the phenomenon that separating with polystyrene modeling cup rim of a cup without sealed membrane and Yoghourt caused to permeate.

Description

A kind of polystyrene modeling cup sealed membrane and preparation method thereof for post-fermentation Yoghourt
Technical field
The invention belongs to composite membrane technology fields, are related to a kind of sealed membrane, more particularly, to one kind for post-fermentation acid Polystyrene modeling cup sealed membrane of milk and preparation method thereof.
Background technique
Yoghourt is that a certain proportion of sucrose is added using fresh milk as raw material, adds pure cream after high temperature sterilization is cooling A kind of dairy produce made of sour strain fermentation, in addition to the nutritive value with fresh milk, because it includes lactic acid bacteria and is fermenting Lactic acid and B family vitamin (such as B2, B6, B12) are generated in journey, be can promote human consumption's breathing, are improved the immunity of people, for a long time Drinking can guarantee calcareous demand, and can be good for stomach, adjust body metabolism, improves immunocompetence, makes one to have good health and a long life, to youngster Virgin, the elderly it is further preferred that, therefore Yoghourt is favored by more and more people.
There are many manufacture crafts of Yoghourt, and high temperature kills after usually mixing the raw materials such as fresh milk or raw milk, sucrose Pure lactobacillus inoculation ferment at constant temperature is added in bacterium after cooling, then filling and sealing and carries out re-pasteurization.Wherein, re-pasteurization work Skill has stringent restriction to temperature, all microorganisms in Yoghourt cannot be killed when temperature is too low, during storage microorganism Breeding leads to product souring or the packet that rises, and quality decline, Yoghourt albumen is denaturalized when the temperature is excessively high, and mouthfeel is rougher.Post-fermentation Yoghourt be high temperature sterilization raw material after cooling is first filling in packing container, add pure lactobacillus inoculation fermentation gained, nothing Two-stage sterilization need to be carried out, operating process is simplified, reduces production cost, while also avoiding the acid that two-stage sterilization may cause The problems such as milk proem qualitative change, quality decline.
The most common packaged form of Yoghourt is modeling cup packaging, has light weight, at low cost, leakproof and easy to carry etc. excellent Point, modeling cup material is mostly polyethylene terephthalate (polyethylene terephthalate, PET), polyethylene (polyethylene, PE), polypropylene (polypropylene, PP) and polystyrene (polystyrene, PS) etc., seal closure Film is mostly aluminium plastic composite material or plating aluminium composite material.As Chinese patent literature CN201998482U discloses one kind for sealing The sealed membrane of polystyrene connecting cup, the sealed membrane are combined by base, barrier layer and hot sealing layer hot pressing, and the barrier layer is Aluminium foil layer or polyester aluminizer film layer, the hot sealing layer are ethylene-vinyl acetate copolymer modified polyethylene film layers, are had easy The service performance taken off, but ethylene-vinyl acetate copolymer modified polyethylene film layer impact resistant strength is limited, and post-fermentation Yoghourt exists The heat and gas etc. generated in fermentation process separates the sealed membrane with polystyrene modeling cup rim of a cup, and then Yoghourt is caused to seep Thoroughly.
Summary of the invention
Therefore, the technical problem to be solved in the present invention is that overcoming the resistance to of heat-sealing polystyrene sealed membrane in the prior art Impact strength is limited, the defect separated for easily occurring sealed membrane when post-fermentation Yoghourt with polystyrene modeling cup rim of a cup, to mention Cup sealed membrane is moulded for a kind of polystyrene for post-fermentation Yoghourt；Meanwhile the present invention also provides a kind of above-mentioned sealed membranes Preparation method.
In order to solve the above technical problems, the present invention provides a kind of polystyrene mould cup sealed membrane, including from top to bottom according to Printing layer, barrier layer and the hot sealing layer of secondary setting, the printing layer are PET laminated polyester film, and the barrier layer is aluminium foil layer, institute State the component that hot sealing layer includes following parts by weight: 30~35 parts of low density polyethylene (LDPE), 25~30 parts of linear low density polyethylene, second 15~20 parts of alkene-methacrylic acid copolymer, 15~20 parts of ethene-vinyl acetate copolymer.
Further, each component fusing point of the hot sealing layer is formed not higher than 110 DEG C.
Further, the hot sealing layer is three-layer extrusion film, the first polyethylene including being successively bonded setting from top to bottom The raw material of layer, the second polyethylene layer and third polyethylene layer, first polyethylene layer and the second polyethylene layer is poly- for low-density The mixture of ethylene and linear low density polyethylene composition, the raw material of the third polyethylene layer be linear low density polyethylene, The mixture of ethylene-methacrylic acid copolymer and ethene-vinyl acetate copolymer composition.
Further, the printing layer with a thickness of 12~20 μm；The barrier layer with a thickness of 7~20 μm；The heat Sealing with a thickness of 25~100 μm.
Further, character pattern layer is additionally provided between the printing layer and the barrier layer.
The present invention also provides a kind of preparation methods of above-mentioned polystyrene modeling cup sealed membrane, include the following steps:
Binder is coated on the surface of the barrier layer, it is dry, make the binder in the barrier layer surface cure shape At the first adhesive layer；At 50~65 DEG C, the printing layer and the first adhesive layer hot pressing are combined with each other；Institute Another surface coating binder of barrier layer is stated, it is dry, form the binder in another surface cure of the barrier layer Second adhesive layer；At 50~70 DEG C, the hot sealing layer and the second adhesive layer hot pressing are combined with each other, base is obtained Film；
The base film is cured at 40~50 DEG C, the curing time >=48h.
Further, before carrying out hot pressing to the printing layer and the barrier layer, first to the printing layer and the resistance Interlayer hot pressing is printed on one side, forms character pattern layer.
Further, include the following steps:
It is printed on the surface of the printing layer, to form character pattern layer；The speed of the printing be 100~ 220m/min, the temperature dried after printing are 40~80 DEG C；Binder is coated on the surface of the character pattern layer, in 50~90 It is dried at DEG C, the binder is made to form the first adhesive layer in the barrier layer surface cure；At 50~65 DEG C Under, the barrier layer and the first adhesive layer hot pressing are combined with each other；On another surface of the barrier layer, coating is glutinous Mixture is dried at 50~90 DEG C, and the binder is made to form second in another surface cure of the barrier layer Adhesive layer；At 50~70 DEG C, the hot sealing layer and the second adhesive layer hot pressing are combined with each other, base film is obtained；
The base film is cured at 40~50 DEG C, the curing time >=48h.
Further, described be dried includes that three sections of temperature are dried, and one section of temperature is 50~65 DEG C, two sections of temperature Higher than described 15~20 DEG C of one section of temperature, three sections of temperature are higher than described 20~25 DEG C of one section of temperature.
Further, the preparation of the hot sealing layer includes the following steps:
The raw material for forming each layer of the hot sealing layer is subjected to fusion plastification respectively, is squeezed out, blown film is then carried out, it is cooling, it obtains To the hot sealing layer.
In the present invention, the low density polyethylene (LDPE), i.e. LDPE, also known as high pressure polyethylene, density be 0.915~ 0.940g/cm3, the linear low density polyethylene is using ethylene as primary raw material, with a small amount of alpha-olefin (such as butene-1, octene- 1 etc.), the resulting product of gas fluidised bed polymerisation is carried out through high pressure or low pressure under the action of catalyst, density is 0.918~ 0.935g/cm3。
Technical solution of the present invention has the advantages that
1. polystyrene provided by the invention moulds cup sealed membrane, including printing layer, the barrier layer set gradually from top to bottom And hot sealing layer, the hot sealing layer is by the low density polyethylene (LDPE) of special ratios, linear low density polyethylene, ethylene-methyl methacrylate Copolymer and ethene-vinyl acetate copolymer composition, the linear low density polyethylene have good resisting environmental stress and cracking Property, the performances such as stronger impact resistant strength and tearing toughness can be well adapted for post-fermentation Yoghourt and generate during the fermentation Heat and gas etc. brought by surge, separated without sealed membrane with polystyrene modeling cup rim of a cup and lead to acid The phenomenon that milk permeates；Have between the ethylene-methacrylic acid copolymer and ethene-vinyl acetate copolymer and polystyrene Good heat-sealing matching；It is copolymerized in linear low density polyethylene, ethylene-methacrylic acid copolymer and ethane-acetic acid ethyenyl Low density polyethylene (LDPE) is added in object, not only increases the compatibility between each component, makes raw material mixing more evenly, and improve The moulding processability of hot sealing layer, each component coordinated, so that sealed membrane of the invention is in conjunction with polystyrene modeling cup rim of a cup When, heat-sealing matching is good, and it is moderate in conjunction with dynamics, it easily tears and works well, easily pierce through, and there is good impact resistance, energy Perform well in post-fermentation Yoghourt.
2. polystyrene provided by the invention moulds cup sealed membrane, the hot sealing layer is three-layer extrusion film, including from top to bottom It is successively bonded the first polyethylene layer, the second polyethylene layer and third polyethylene layer of setting, the structure of three-layer extrusion film improves The surface flatness and mechanical strength of hot sealing layer further improve the properties of hot sealing layer, and tie between each layer by hot melt It closes without binder, therefore its wholesomeness is higher.
3. polystyrene provided by the invention moulds cup sealed membrane, the thickness of each layer, the thickness of each film layer are further defined The main adhesion firmness influenced between layers, each layer of sealed membrane of the invention uses specific thickness, so that the sealing Adhesion firmness is very high between each layer of film, and by long-term use after showing for layering or splitting will not be still generated between each layer As.
4. the preparation method of polystyrene modeling cup sealed membrane provided by the invention, the method will constitute the polystyrene Hot pressing is compound at a certain temperature for each layer of modeling cup sealed membrane, and base film is made, and then carries out maturation process to base film again, obtains The polystyrene moulds cup sealed membrane.The present invention to the parameters such as the hot pressing combined temp of each layer and temperature, the time of curing into Row limits, and so that each layer is preferably bonded together, without generating lamination.It is multiple using squeezing out in the preparation of hot sealing layer Synthesis type technique, not only improves the combined strength bination of hot sealing layer, and improves production efficiency, reduces production cost.
5. the preparation method of polystyrene modeling cup sealed membrane provided by the invention, is dried, rear two using three sections of temperature The temperature of section is higher than one section of temperature, so set, the retarder thinner and instantaneous high-temperature in binder can be dried sufficiently There is the drying of binder appearance, and internal layer solvent can not dry composite membrane is caused to lead to the problem of fold.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is the structural schematic diagram of the polystyrene modeling cup sealed membrane of the embodiment of the present invention 1；
Fig. 2 is the structural schematic diagram of hot sealing layer in Fig. 1；
Description of symbols:
1- printing layer；2- barrier layer；3- hot sealing layer；The first polyethylene layer of 31-；The second polyethylene layer of 32-；33- third is poly- Pvdf layer.
Specific embodiment
Technical solution of the present invention will be clearly and completely described below, it is clear that described embodiment is this hair Bright a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not having Every other embodiment obtained under the premise of creative work is made, shall fall within the protection scope of the present invention.In addition, below Technical characteristic involved in described different embodiments of the present invention as long as they do not conflict with each other can be mutual In conjunction with.
Embodiment 1
A kind of polystyrene modeling cup sealed membrane, as shown in Figure 1, including printing layer 1, the barrier layer set gradually from top to bottom 2 and hot sealing layer 3, the thickness of each layer be respectively 12 μm, 7 μm and 25 μm.In the present embodiment, the printing layer 1 is PET polyester film Layer, the barrier layer 2 are aluminium foil layer, and the hot sealing layer 3 is gathered by the low density polyethylene (LDPE) of 35wt%, the linea low density of 30wt% The ethene-vinyl acetate copolymer of ethylene, the ethylene-methacrylic acid copolymer of 15wt% and 20wt% forms, and low-density is poly- Ethylene, linear low density polyethylene, the fusing point of ethylene-methacrylic acid copolymer and ethene-vinyl acetate copolymer be not high In 110 DEG C.As shown in Fig. 2, hot sealing layer 3 includes the first polyethylene layer 31, the second polyethylene for being successively bonded setting from top to bottom Layer 32 and third polyethylene layer 33, third polyethylene layer 33 are directly contacted with polystyrene modeling cup rim of a cup.Wherein the first polyethylene Layer 31 is made of low density polyethylene (LDPE) and linear low density polyethylene, and the weight ratio of the two is 3:1, and the second polyethylene layer 32 is by low Density polyethylene and linear low density polyethylene composition, the weight ratio of the two is 2:1, and third polyethylene layer 33 is by linea low density Polyethylene, ethylene-methacrylic acid copolymer and ethene-vinyl acetate copolymer composition, the weight ratio of three are 3:3:4.
Hot sealing layer described in the present embodiment the preparation method comprises the following steps:
The raw material for forming each layer of the hot sealing layer is separately added into each layer extruder and carries out fusion plastification, extrusion, is then existed Blow-up ratio is 1:2, and temperature carries out blown film under conditions of being 180 DEG C, then cooling through lower blowing water cold process, and three-layer extrusion film is made.
Polystyrene described in the present embodiment mould cup sealed membrane the preparation method comprises the following steps:
Binder, dosage 3g/m are coated on the surface of PET polyester film2, continuously successively with the speed of 200m/min It is dried to obtain the first adhesive layer by 50 DEG C, 65 DEG C and 75 DEG C three sections of baking ovens, is then 50 DEG C in hot drum temperature Under, aluminium foil layer and the first adhesive layer hot pressing are combined with each other；Binder is coated on another surface of aluminium foil layer, is used Amount is 3g/m2, continuously successively it is dried to obtain the by 50 DEG C, 65 DEG C and 75 DEG C three baking ovens with the speed of 180m/min Hot sealing layer and the second adhesive layer hot pressing are combined with each other, obtain then in the case where hot drum temperature is 50 DEG C by two adhesive layers To base film；The base film is cured at 50 DEG C, curing time 48h moulds cup sealed membrane to get the polystyrene.
Embodiment 2
A kind of polystyrene modeling cup sealed membrane, including printing layer, barrier layer and the hot sealing layer set gradually from top to bottom, respectively The thickness of layer is respectively 20 μm, 20 μm and 100 μm.In the present embodiment, the printing layer is PET laminated polyester film, the barrier Layer is aluminium foil layer, the hot sealing layer by the low density polyethylene (LDPE) of 33.3wt%, 27.8wt% linear low density polyethylene, The ethylene-methacrylic acid copolymer of 22.2wt% and the ethene-vinyl acetate copolymer composition of 16.7wt%, low density polyethylene Alkene, linear low density polyethylene, ethylene-methacrylic acid copolymer and ethene-vinyl acetate copolymer fusing point be not higher than 110℃.Hot sealing layer includes the first polyethylene layer, the second polyethylene layer and third polyethylene for being successively bonded setting from top to bottom Layer, third polyethylene layer are directly contacted with polystyrene modeling cup rim of a cup.Wherein the first polyethylene layer is by low density polyethylene (LDPE) and line Property low density polyethylene (LDPE) composition, the weight ratio of the two is 10:3, and the second polyethylene layer is by low density polyethylene (LDPE) and linea low density The weight ratio of polyethylene composition, the two is 5:2, and third polyethylene layer is total by linear low density polyethylene, ethylene-methyl methacrylate Polymers and ethene-vinyl acetate copolymer composition, the weight ratio of three are 3:4:3.
Hot sealing layer described in the present embodiment the preparation method comprises the following steps:
The raw material for forming each layer of the hot sealing layer is separately added into each layer extruder and carries out fusion plastification, extrusion, is then existed Blow-up ratio is 1:4, and temperature carries out blown film under conditions of being 170 DEG C, then cooling through lower blowing water cold process, and three-layer extrusion film is made.
Polystyrene described in the present embodiment mould cup sealed membrane the preparation method comprises the following steps:
Binder, dosage 4g/m are coated on the surface of PET polyester film2, continuously successively with the speed of 180m/min It is dried to obtain the first adhesive layer by 65 DEG C, 85 DEG C and 90 DEG C three sections of baking ovens, is then 65 DEG C in hot drum temperature Under, aluminium foil layer and the first adhesive layer hot pressing are combined with each other；Binder is coated on another surface of aluminium foil layer, is used Amount is 4g/m2, continuously successively it is dried to obtain by 65 DEG C, 85 DEG C and 90 DEG C three sections of baking ovens with the speed of 180m/min Hot sealing layer and the second adhesive layer hot pressing are combined with each other by the second adhesive layer then in the case where hot drum temperature is 70 DEG C, Obtain base film；The base film is cured at 40 DEG C, curing time 60h moulds cup sealed membrane to get the polystyrene.
Embodiment 3
A kind of polystyrene modeling cup sealed membrane, including printing layer, the character pattern layer, barrier layer set gradually from top to bottom And hot sealing layer, the thickness of printing layer are respectively 16 μm, the ink usage of character pattern layer is 3g/m2, barrier layer with a thickness of 15 μ M, hot sealing layer with a thickness of 65 μm.In the present embodiment, the printing layer is PET laminated polyester film, and the barrier layer is aluminium foil layer, The low density polyethylene (LDPE) of the hot sealing layer 33.3wt%, the linear low density polyethylene of 27.8wt%, ethylene-first of 22.2wt% The ethene-vinyl acetate copolymer of base acrylic copolymer and 16.7wt% composition, low density polyethylene (LDPE), linear low density polyethylene The fusing point of alkene, ethylene-methacrylic acid copolymer and ethene-vinyl acetate copolymer is not higher than 110 DEG C.Hot sealing layer include from Successively it is bonded the first polyethylene layer, the second polyethylene layer and third polyethylene layer of setting under, third polyethylene layer and poly- Styrene modeling cup rim of a cup directly contacts.Wherein the first polyethylene layer is made of low density polyethylene (LDPE) and linear low density polyethylene, The weight ratio of the two is 10:3, and the second polyethylene layer is made of low density polyethylene (LDPE) and linear low density polyethylene, the weight of the two Amount is than being 5:2, and third polyethylene layer is by linear low density polyethylene, ethylene-methacrylic acid copolymer and ethane-acetic acid ethyenyl Copolymer composition, the weight ratio of three are 3:4:3.
Hot sealing layer described in the present embodiment the preparation method comprises the following steps:
The raw material for forming each layer of the hot sealing layer is separately added into each layer extruder and carries out fusion plastification, extrusion, is then existed Blow-up ratio is 1:5, and temperature carries out blown film under conditions of being 190 DEG C, then cooling through lower blowing water cold process, and three-layer extrusion film is made.
Polystyrene described in the present embodiment mould cup sealed membrane the preparation method comprises the following steps:
The surface of PET polyester film is printed, to form character pattern layer, the dosage of ink is 3g/m2；The print The speed of brush is 220m/min, and the temperature dried after printing is 80 DEG C；Binder is coated on the surface of the character pattern layer, Dosage is 4g/m2, continuously successively it is dried by 65 DEG C, 80 DEG C and 85 DEG C three sections of baking ovens with the speed of 180m/min To the first adhesive layer, then in the case where hot drum temperature is 55 DEG C, aluminium foil layer and the first adhesive layer hot pressing are compounded in one It rises；Binder, dosage 2.5g/m are coated on another surface of aluminium foil layer2, continuously successively passed through with the speed of 150m/min 65 DEG C, 80 DEG C and 85 DEG C three sections of baking ovens are dried to obtain the second adhesive layer, will then in the case where hot drum temperature is 60 DEG C Hot sealing layer is combined with each other with the second adhesive layer hot pressing, obtains base film；The base film is cured at 45 DEG C, when curing Between 54h to get the polystyrene mould cup sealed membrane.
Embodiment 4
A kind of polystyrene modeling cup sealed membrane, including printing layer, the character pattern layer, barrier layer set gradually from top to bottom And hot sealing layer, the thickness of printing layer are respectively 15 μm, the ink usage of character pattern layer is 3g/m2, barrier layer with a thickness of 12 μ M, hot sealing layer with a thickness of 60 μm.In the present embodiment, the printing layer is PET laminated polyester film, and the barrier layer is aluminium foil layer, The low density polyethylene (LDPE) of the hot sealing layer 33.3wt%, the linear low density polyethylene of 27.8wt%, ethylene-first of 22.2wt% The ethene-vinyl acetate copolymer of base acrylic copolymer and 16.7wt% composition, low density polyethylene (LDPE), linear low density polyethylene The fusing point of alkene, ethylene-methacrylic acid copolymer and ethene-vinyl acetate copolymer is not higher than 110 DEG C.Hot sealing layer include from Successively it is bonded the first polyethylene layer, the second polyethylene layer and third polyethylene layer of setting under, third polyethylene layer and poly- Styrene modeling cup rim of a cup directly contacts.Wherein the first polyethylene layer is made of low density polyethylene (LDPE) and linear low density polyethylene, The weight ratio of the two is 10:3, and the second polyethylene layer is made of low density polyethylene (LDPE) and linear low density polyethylene, the weight of the two Amount is than being 5:2, and third polyethylene layer is by linear low density polyethylene, ethylene-methacrylic acid copolymer and ethane-acetic acid ethyenyl Copolymer composition, the weight ratio of three are 3:4:3.
Hot sealing layer described in the present embodiment the preparation method comprises the following steps:
The raw material for forming each layer of the hot sealing layer is separately added into each layer extruder and carries out fusion plastification, extrusion, is then existed Blow-up ratio is 1:4, and temperature carries out blown film under conditions of being 200 DEG C, then cooling through lower blowing water cold process, and three-layer extrusion film is made.
Polystyrene described in the present embodiment mould cup sealed membrane the preparation method comprises the following steps:
The surface of PET polyester film is printed, to form character pattern layer, the dosage of ink is 3g/m2；The print The speed of brush is 100m/min, and the temperature dried after printing is 40 DEG C；Binder is coated on the surface of the character pattern layer, Dosage is 2.5g/m2, continuously successively it is dried by 60 DEG C, 75 DEG C and 80 DEG C three sections of baking ovens with the speed of 200m/min The first adhesive layer is obtained, then in the case where hot drum temperature is 60 DEG C, aluminium foil layer and the first adhesive layer hot pressing are compounded in Together；Binder, dosage 2.5g/m are coated on another surface of aluminium foil layer2, continuously successively passed through with the speed of 150m/min 60 DEG C, 75 DEG C and 80 DEG C three sections of baking ovens are crossed to be dried to obtain the second adhesive layer, then in the case where hot drum temperature is 65 DEG C, Hot sealing layer and the second adhesive layer hot pressing are combined with each other, base film is obtained；The base film is cured at 48 DEG C, is cured Time 50h moulds cup sealed membrane to get the polystyrene.
Comparative example 1
This comparative example provides a kind of aluminum foil sealing film comprising the printing layer that sets gradually from top to bottom, barrier layer and Hot sealing layer, the thickness of each layer are respectively 12 μm, 7 μm and 25 μm.In this comparative example, the printing layer is PET laminated polyester film, institute Stating barrier layer is aluminium foil layer, and the hot sealing layer is ethylene-vinyl acetate copolymer modified polyethylene layer, ethene-vinyl acetate The mass ratio of copolymer and polyethylene is 1:1.
Using the sealed membranes of above-mentioned raw materials, the preparation method is the same as that of Example 1.
Comparative example 2
This comparative example provides a kind of sealed membrane comprising printing layer, barrier layer and the heat-sealing set gradually from top to bottom Layer, the thickness of each layer is respectively 12 μm, 7 μm and 25 μm.In this comparative example, the printing layer is PET laminated polyester film, the resistance Interlayer is aluminium foil layer, the hot sealing layer by the low density polyethylene (LDPE) of 65wt%, the ethylene-methacrylic acid copolymer of 15wt% and The ethene-vinyl acetate copolymer of 20wt% forms, low density polyethylene (LDPE), ethylene-methacrylic acid copolymer and ethylene-acetate The fusing point of ethylene copolymer composition is not higher than 110 DEG C.Hot sealing layer includes that the first polyethylene layer, the second polyethylene layer and third are poly- Pvdf layer, third polyethylene layer are directly contacted with polystyrene modeling cup rim of a cup.Wherein the first polyethylene layer and the second polyethylene layer It is made of low density polyethylene (LDPE), third polyethylene layer is by linear low density polyethylene, ethylene-methacrylic acid copolymer and second Alkene-vinyl acetate copolymer composition, the weight ratio of three are 3:3:4.
Using the same embodiment of preparation method of the hot sealing layer of above-mentioned raw materials and polystyrene modeling cup sealed membrane 1。
The test of 1 impact resistance of experimental example
The present invention is implemented into the sealed membrane in 1-4 and comparative example 1-2 and carries out impact resistance test, test method and test As a result as follows.
Test method: high temperature sterilization raw milk after cooling is filling in PS glasss a batch of, and pure lactic acid bacteria is added Kind, it takes 50 parts of sealed membrane in 1-4 of the embodiment of the present invention and comparative example 1-2 to be packaged in same apparatus for production line respectively, seals Sample after dress is placed in 35~45 DEG C of incubator, is fermented 6~8 hours, is inverted PS glasss, whether observation rim of a cup has Yoghourt infiltration Thoroughly, as qualified if nothing；Conversely, as unqualified.
Test result: the sealed membrane of 1-4 of the embodiment of the present invention is tested through above-mentioned test method, display only 2 parts of test knots Fruit is unqualified, remaining test result is qualified, qualification rate 99%；The sealed membrane of comparative example 1 is tested through above-mentioned test method, is shown Show only 5 parts of test result qualifications, qualification rate 10%；The sealed membrane of comparative example 2 is tested through above-mentioned test method, shows 16 Part test result is qualified, qualification rate 32%.It can be seen that sealed membrane impact resistance of the invention is preferable, can use well In post-fermentation Yoghourt.
Experimental example 2 easily takes off performance test
The test for easily taking off performance, test method and test are carried out to the sealed membrane in above-described embodiment 1-4 and comparative example 1-2 As a result as follows.
Test method: the present invention is taken to implement 10 parts of sealed membrane in 1-4 and comparative example 1-2 and with a batch of PS respectively Cup seals under the conditions of 200 DEG C on heat sealing machine, and envelope is tested on XLM type Intelligent electronic tensil testing machine (Jinan blue streak) The opening force of mouth, is averaged the opening force as the sample respectively.
Test result: the opening force of sealed membrane is 10~25N in 1-4 of the embodiment of the present invention, and sealed membrane opens in comparative example 1 Qi Li is 10~20N, and the opening force of sealed membrane is 15~25N in comparative example 2.It can be seen that sealed membrane of the invention is with good Good easily takes off performance.
Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.It is right For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or It changes.There is no necessity and possibility to exhaust all the enbodiments, and it is extended from this it is obvious variation or It changes still within the protection scope of the invention.

Claims (10)

1. a kind of polystyrene moulds cup sealed membrane, including the printing layer (1), barrier layer (2) and heat-sealing set gradually from top to bottom Layer (3), the printing layer (1) are PET laminated polyester film, and the barrier layer (2) is aluminium foil layer, which is characterized in that the heat-sealing Layer (3) includes the component of following parts by weight: 30~35 parts of low density polyethylene (LDPE), 25~30 parts of linear low density polyethylene, ethylene- 15~20 parts of methacrylic acid copolymer, 15~20 parts of ethene-vinyl acetate copolymer.
2. polystyrene according to claim 1 moulds cup sealed membrane, which is characterized in that form each of the hot sealing layer (3) Component fusing point is not higher than 110 DEG C.
3. polystyrene according to claim 1 or 2 moulds cup sealed membrane, which is characterized in that the hot sealing layer (3) is three layers Co-extrusion film, the first polyethylene layer (31), the second polyethylene layer (32) and the poly- second of third including being successively bonded setting from top to bottom The raw material of alkene layer (33), first polyethylene layer (31) and the second polyethylene layer (32) is low density polyethylene (LDPE) and linear low close The mixture of polyethylene composition is spent, the raw material of the third polyethylene layer (33) is linear low density polyethylene, ethylene-methyl-prop The mixture of olefin(e) acid copolymer and ethene-vinyl acetate copolymer composition.
4. polystyrene according to claim 1-3 moulds cup sealed membrane, which is characterized in that the printing layer (1) With a thickness of 12~20 μm；The barrier layer (2) with a thickness of 7~20 μm；The hot sealing layer (3) with a thickness of 25~100 μm.
5. polystyrene according to claim 1-4 moulds cup sealed membrane, which is characterized in that in the printing layer (1) character pattern layer is additionally provided between the barrier layer (2).
6. a kind of preparation method of the described in any item polystyrene modeling cup sealed membranes of claim 1-5, which is characterized in that including Following steps:
Binder is coated on the surface of the barrier layer (2), it is dry, make the binder in the barrier layer (2) surface cure Form the first adhesive layer；At 50~65 DEG C, the printing layer (1) and the first adhesive layer hot pressing are compounded in one It rises；Binder is coated on another surface of the barrier layer (2), it is dry, make the binder in the another of the barrier layer (2) Surface cure forms the second adhesive layer；It is at 50~70 DEG C, the hot sealing layer (3) and the second adhesive layer hot pressing are multiple It is combined, obtains base film；
The base film is cured at 40~50 DEG C, the curing time >=48h.
7. preparation method according to claim 6, which is characterized in that the printing layer (1) and the barrier layer (2) Before carrying out hot pressing, first printing on one side to the printing layer (1) and the barrier layer (2) hot pressing, formation character pattern layer.
8. preparation method according to claim 7, which comprises the steps of:
The surface of the printing layer (1) is printed, to form character pattern layer；The speed of the printing is 100~220m/ Min, the temperature dried after printing are 40~80 DEG C；Binder is coated on the surface of the character pattern layer, at 50~90 DEG C It is dried, the binder is made to form the first adhesive layer in the barrier layer (2) surface cure；At 50~65 DEG C Under, the barrier layer (2) and the first adhesive layer hot pressing are combined with each other；On another surface of the barrier layer (2) Binder is coated, is dried at 50~90 DEG C, makes the binder in another surface cure of the barrier layer (2) Form the second adhesive layer；At 50~70 DEG C, the hot sealing layer (3) and the second adhesive layer hot pressing are compounded in one It rises, obtains base film；
The base film is cured at 40~50 DEG C, the curing time >=48h.
9. preparation method according to claim 8, which is characterized in that described be dried includes at three sections of temperature are dry Reason, one section of temperature are 50~65 DEG C, and two sections of temperature are higher than described 15~20 DEG C of one section of temperature, and three sections of temperature are higher than one section of temperature 20~25 DEG C of degree.
10. according to the described in any item preparation methods of claim 6-9, which is characterized in that the preparation of the hot sealing layer (3) includes Following steps:
The raw material for forming the hot sealing layer (3) each layer is subjected to fusion plastification respectively, is squeezed out, blown film is then carried out, it is cooling, it obtains The hot sealing layer (3).
CN201811216704.7A 2018-10-18 2018-10-18 A kind of polystyrene modeling cup sealed membrane and preparation method thereof for post-fermentation Yoghourt Pending CN109291570A (en)

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CN110549714A (en) * 2019-08-28 2019-12-10 浙江金石包装有限公司 Straw cup seals complex film
CN111890765A (en) * 2020-07-21 2020-11-06 金石包装（嘉兴）有限公司 Easy-to-tear film for plastic container and preparation method thereof
CN112852335A (en) * 2021-01-18 2021-05-28 江苏利特尔绿色包装股份有限公司 Liquid sealing film for injection molding cup and film-coated paper cup and preparation method thereof
CN114572557A (en) * 2020-11-30 2022-06-03 内蒙古伊利实业集团股份有限公司 Sealing film, cup containing sealing film and preparation method of cup

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CN105128479A (en) * 2015-08-24 2015-12-09 金石包装（嘉兴）有限公司 Milk staining-free compound cover film
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Publication number Priority date Publication date Assignee Title
CN110549714A (en) * 2019-08-28 2019-12-10 浙江金石包装有限公司 Straw cup seals complex film
CN110549714B (en) * 2019-08-28 2021-11-09 浙江金石包装有限公司 Straw cup seals complex film
CN111890765A (en) * 2020-07-21 2020-11-06 金石包装（嘉兴）有限公司 Easy-to-tear film for plastic container and preparation method thereof
CN114572557A (en) * 2020-11-30 2022-06-03 内蒙古伊利实业集团股份有限公司 Sealing film, cup containing sealing film and preparation method of cup
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CN112852335A (en) * 2021-01-18 2021-05-28 江苏利特尔绿色包装股份有限公司 Liquid sealing film for injection molding cup and film-coated paper cup and preparation method thereof

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