CN101508371B - Packaging film for frozen potables and preparation method thereof - Google Patents
Packaging film for frozen potables and preparation method thereof Download PDFInfo
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- CN101508371B CN101508371B CN2009101283717A CN200910128371A CN101508371B CN 101508371 B CN101508371 B CN 101508371B CN 2009101283717 A CN2009101283717 A CN 2009101283717A CN 200910128371 A CN200910128371 A CN 200910128371A CN 101508371 B CN101508371 B CN 101508371B
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Abstract
The invention provides a packing film for frozen beverages. The packing film comprises a composite film of a printing protective layer and a thermal sealing layer, the materials of the thermal sealing layer comprise PP and color master batch, wherein the color master batch accounts for 8 to 10 percent of total weight of the materials for the thermal sealing layer, and the PP accounts for 90 to 92 percent of total weight of the material for the thermal sealing layer. The invention also provides a method for preparing the packing film. The packing film as a product can reach the printing level and the using effect of the prior pearly-luster OPP, is superior to the effect of the pearly-luster OPP, has low cost, and more accords with the environmental protection requirement.
Description
Technical field
The invention provides a kind of packing, specifically, is the packaging film that the packing about field of food, especially frozen are used.
Background technology
In present stage; the packaging for foodstuff field; specifically---cold drink; normally used packaging film is the complex film of double-layer structure; promptly; be positioned at outermost printing protective cover; requirement has good printing adaptability, good dimensional stability, and the glossiness transparency is good; and possesses the certain protection function; the general BOPP film that adopts that is to say with thin (BOPP) film of Biaxially oriented polypropylene to be the printing protective cover, is hot sealing layer at printing protective cover another side; also be with respect to outer field internal layer; according to different packing materials, it is wet that it mainly plays resistance; resistance oxygen; the effect of moulding heat-sealing fully enclosed is played in effects such as resistance light simultaneously again; require nontoxic; free from extraneous odour; be chemical inertness; have certain heat sealability, generally adopt pearly-lustre OPP etc.
The material several commonly used of cold drink packing:
1, dry type is compound.Dry type composite algorithm principle: be at membrane surface coating one deck solvent-based adhesive,, solvent fully volatilized, under the hot pressing state, be bonded into complex film with another kind of base material through the drying tunnel heat drying.Its material commonly used is: BOPP/VMCPP; BOPP/ pearly-lustre film; Delustring BOPP/ pearly-lustre film; BOPP/CPP.
2, extrude compound.Extrude composite principle: extruding compound is the complex method of the extensive a kind of economy that adopts, system extrudes hot-melt adhesive (PE, PP etc.) with extruder, flow down from T type head, between two rollers that rotating (compression roller, chill roll) of closed contact, hot melting plastic is pressed between plastic film and plastic film or other two kinds of base material films, perhaps hot melting plastic is only with a kind of base material film extruding, the bonding multilayer materials of making.Its material commonly used is: BOPP/PP+ look mother; Delustring BOPP/PP+ look mother.
The hot sealing layer of cold drink packing use amount maximum is pearly-lustre OPP, and one of its characteristics are the cost height.Now along with the increase of cold drink output and increasing of product variety, the use amount of packaging film also increases year by year, increase trend year by year but the packaging film purchase cost is, how to remove to alleviate packing of product film cost pressure, for cold drink be urgently will solution problem.
Summary of the invention
The characteristics of comprehensive prior art complex film, and food service industry increase year by year to alleviating the demand of packing of product film cost pressure, the problem that this area urgently will solution is exactly how to remove to alleviate packing of product film cost pressure.Therefore, technical matters to be solved by this invention: guaranteeing under normal printing of product and the manufacturing technique requirent prerequisite, seeking the good new product that substitutes of pearly-lustre OPP.
The material of existing similar PP material and look mother's combination has the instant noodles packing, moulds holder box series products, look mother's main effect is exactly the visual effect that changes color, content generally is 3-8%wt, Masterbatch can have multiple color, decide by customer demand, PP+ white mother can be used for the frozen packaging field.The objective of the invention is to seek the good new product that substitutes of pearly-lustre OPP, desire to substitute the pearly-lustre film with PP and look mother's combination, in the hope of in the effect that reaches existing pearly-lustre OPP film and when guaranteeing the advantage and excellent properties of the food package film that these are being used, significantly reduce cost, strengthen cost performance of product and increase profit margin.
The object of the present invention is to provide a kind of packaging film for frozen potables; this packaging film be the double-ply structure of composite membrane; comprise and be positioned at outermost printing protective cover (generally adopting bidirectional stretching polypropylene film BOPP film); and at the hot sealing layer that prints the protective cover another side; the material of this hot sealing layer comprises PP and look mother, and wherein look mother's adding proportion (quality) is 8-10%.
The present invention also aims to provide a kind of processing technology of packaging film for frozen potables, this technology is by unreeling (outer BOPP printed layers), coating (solvent-based adhesive), extruding (PP+ look mother) and cooling (process of compound ectonexine), and last rolling obtains above-mentioned packaging film for frozen potables.
The invention provides a kind of packaging film for frozen potables; this packaging film is the complex film that comprises printing protective cover and hot sealing layer; the material of the hot sealing layer of this packaging film is formed and is comprised PP and look mother; wherein look mother's weight accounts for the 8-10% of this hot sealing layer weight, and the weight of PP accounts for the 90-92% of this hot sealing layer weight.
The packaging film in normal food field all is complex films of double-layer structure, be positioned at outermost printing protective cover, this printing protective cover should have good printing adaptability, good dimensional stability, the glossiness transparency is good and possess the certain protection function, therefore, generally adopt the BOPP film in the industry, that is to say with thin (BOPP) film of Biaxially oriented polypropylene to be the printing protective cover; Another aspect of printing protective cover is a hot sealing layer relatively; also be with respect to outer field internal layer; Bao Zhuan food difference as required; conclude this hot sealing layer and mainly play effects such as resistance is wet, resistance oxygen, resistance light; play simultaneously the effect of moulding heat-sealing fully enclosed again; therefore require the material of this hot sealing layer must be nontoxic, free from extraneous odour, be chemical inertness, have certain heat sealability, generally adopt pearly-lustre OPP material in the industry.
In the packaging for foodstuff field, existing similar PP material and look mother's combination at present generally all is used on the food pack that for example instant noodles are packed, and wherein look mother's content generally accounts for the 3-8% of all material gross weight.Look mother's effect is different in effect that this ratiometric look mother plays and the combination of the present invention, the objective of the invention is to replace the pearly-lustre film with the look mother, therefore, whiteness to product has requirement, and the effect that the look mother of the content range of special ratios reaches in final products of the present invention is different, what the present invention pursued is to reach fully or unlimited effect near the pearly-lustre film,, adds the effect that look imperial mother whiteness need reach the pearly-lustre film that is.Through a large amount of screening experiments; obtain optimized technical scheme: the packaging film of the complex film that comprises printing protective cover and hot sealing layer that a kind of frozen is used; the material of the hot sealing layer of this packaging film is made up of PP and look mother; wherein look mother's weight accounts for the 8-10% of this hot sealing layer weight, and the weight of PP accounts for the 90-92% of this hot sealing layer weight.The packaging film that the combination of materials of above proportioning is made has together not only played resistance and has wet, hindered oxygen, resistance light and the effect of moulding heat-sealing fully enclosed, the intimate again simultaneously effect that has perfectly reached the pearly-lustre film.
Packaging film for frozen potables of the present invention is followed the professional etiquette and the standard of above line packaging film in the industry equally, and the structure of this packaging film is the double-ply complex film, and it is printing protective cover and hot sealing layer; Wherein, described printing protective cover is positioned at outermost layer; employing conventional material for example bidirectional stretching polypropylene film BOPP film is made; this printing protective cover has good printing adaptability; good dimensional stability; the glossiness transparency is good; and possesses the certain protection function; described hot sealing layer is at the relative another side of printing protective cover; this hot sealing layer adopts and comprises that PP and look female two kinds of materials pass through the specified weight proportioning and make; wherein look mother's adding proportion (quality) accounts for the 8-10% of this hot sealing layer material weight, and preferably the adding proportion of this look mother in this hot sealing layer is 8.3-9.7%wt.
Through heat seal strength and suitable indexs such as range of temperatures are compared hot blast film of being made up of PP and look parent material of the present invention (pouring film) and existing pearly-lustre OPP heat-sealing film, data are as follows, as can be seen, the female hot blast film of forming (pouring film) of PP+ look of the present invention is more effective than the heat-sealing of existing pearly-lustre OPP heat-sealing film, being more suitable for the frozen packing uses, solved the bad problem of easily opening bag of cold drink packing heat sealability, simultaneously, can reduce the buying and the productive costs of industrial packaging film greatly.
| Project | BOPP/ pearly-lustre OPP | BOPP/PP+ look mother |
| Heat seal strength (N/15mm) | 1-1.5 | 7-10 |
| The serviceability temperature scope | -20-120 | -40-120 |
Of the present invention forming gross weight with material is 100% calculating by PP and the look female hot blast film of forming (pouring film), and wherein look mother's adding proportion is 8-10%.This composition proportioning is that the inventor is through a large amount of screenings, multifactorial evaluation is checked and rated the preferred proportion that draws comprehensively, under the prerequisite that this is formed and ratio all satisfies, it can reach Expected Results of the present invention, and the effect than existing pearly-lustre OPP heat-sealing film obviously strengthens, compared to pearly-lustre OPP heat-sealing film, the heat-sealing film of above-mentioned composition of the present invention is more suitable for especially frozen packing use of field of food, having solved cold drink, to pack long-standing heat sealability bad and easily open the drawback of bag, simultaneously, reduce the cost of industrial packaging film greatly, promoted the profit margin of enterprise, also given product higher cost performance, be easy to be accepted by the customer and approve.
In screening experiment of the present invention, carry out the screening (the screening experiment data owe to give temporarily) of the constituent of material earlier, after constituent is fixing, carry out the screening of proportioning again, the representative point value of intercepting in the look female adding proportion (%wt) of similar Package bag for instant noodles material, and select again to select in 12%wt, 10%wt, 7%wt, the 6%wt equal proportion, the contriver finds, when the percentage of Masterbatch in the material gross weight surpasses 10%, the product heat sealability is poor, and packing of product cost increases; When the percentage of Masterbatch in the material gross weight was lower than 8%, product printing whiteness was bad, the visual effect of influence packing; Have only when the percentage of Masterbatch in the material gross weight is 8-10%, product printing whiteness is good, can reach the visual effect of pearly-lustre OPP packaging film, and also better than the effect of pearly-lustre OPP packaging film, reaches good packing heat-sealing effect.
In a preferred embodiment of the invention, provide a kind of packaging film for frozen potables of double-ply structure of composite membrane, this packaging film is made of printing protective cover and hot sealing layer double-layer structure; Described printing protective cover is a bidirectional stretching polypropylene film; Described hot sealing layer is in a side of this printing protective cover, and this hot sealing layer is the pouring film that comprises that PP and look parent material are made, and the percentum that described PP and look mother account for this hot sealing layer weight is: look female 8-10%, PP is 90-92%.
Above-mentioned printing protective cover adopt conventional material for example bidirectional stretching polypropylene film BOPP film make, the advantage of this printing protective cover be have good printing adaptability, good dimensional stability, the glossiness transparency is good and possess defencive function; Above-mentioned hot sealing layer is at printing protective cover opposite side; be preferably constituent and comprise that materials compositions such as PP and look mother drench film; more preferably this pouring film consists of two kinds of PP and looks female; PP and look mother's weight proportion (accounting for the percentum of the material total weight of this hot sealing layer) is more preferably: the look mother accounts for 8.5-9.5%, and PP accounts for 90.5-91.5%.
In order to reach better effect; satisfy the requirement of different hierarchies of consumption; in the packaging film of the structure of composite membrane that comprises printing protective cover and hot sealing layer of the present invention; the material of heat-sealing film is except PP and look mother; can also optionally add materials such as PE; because PE can improve the low temperature resistance of compound package material, the different requirements of levying with the demand and the consumption of the product that satisfies different characteristics and proterties.
In another preferred embodiment of the present invention, a kind of packaging film that comprises the structure of composite membrane of printing protective cover and hot sealing layer is provided, this packaging film is the wrapping film of frozen; Wherein printing protective cover adopts bidirectional stretching polypropylene film BOPP film to make, and this bidirectional stretching polypropylene film BOPP membrane material and the printing protective cover of making thereof have good printing adaptability, good dimensional stability, the glossiness transparency is good and effect such as defencive function; Described hot sealing layer is in the relative side of printing protective cover; adopt PP, look female and can increase low temperature resistance PE material process specified weight proportioning and make; its concrete proportioning (accounting for the percentum of this hot sealing layer material total weight) of forming is: the look mother accounts for 8-10%wt; PP accounts for 90-92%wt; PE accounts for 0.1-1%wt, and above repertoire sum satisfies 100%wt.For example, the look mother of 8-10%wt, the PP+PE of 90-92%wt, wherein PE generally accounts for 0.1-1%wt, more than be 100%wt all in this hot sealing layer material total weight.
Look mother of the present invention (ColorMasterBatch) has another name called the look kind, be that a kind of pigment with super quantity evenly is attached among the resin and the aggregation that makes, that is to say, the look mother is a kind of novel high polymer material special coloring agent, also claims pigment preparation matter (PigmentPreparation).It is made up of pigment or dyestuff, carrier and three kinds of fundamentals of additive, be that the pigment of super quantity or dyestuff are attached among the resin and the aggregation that obtains equably, can claim condensed pigment (PigmentConcentration), so look mother's tinting power is higher than pigment itself.
Having that look mother's classification is commonly used is following several:
Press the carrier classification: as PE look mother, PP look mother, ABS look mother, PVC look mother, EVA look mother etc.;
Classification by use: as injection look mother, blowing look mother, spinning look mother etc.;
Each kind can be divided into different grades again, as:
1. senior injection look mother is used for cosmetic package box, toy, electric appliance casing and other senior goods;
2. normal injection look mother is used for general daily plastic goods, industrial container etc.;
3. senior blown film look mother, the blowing that is used for ultra-thin goods is painted;
4. common blown film look mother, the blowing that is used for general packaging bag, woven bag is painted;
5. spinning look mother, it is painted to be used for the textile fibres spinning, and look female granules of pigments is thin, the concentration height, strong coloring force is heat-resisting, fastness to light good;
6. rudimentary look mother is used for making to the less demanding after-product of quality of colour, as sewage disposer, rudimentary container etc.
The look mother that the present invention adopts is generally common blown film look mother, on the market each brand all can, need not to limit look mother's fixed type.
It is a kind of resin material for PP of the present invention, is called acrylic resin again.
The chemistry of PP polypropylene material and physical property are a kind of hemicrystalline material, will be harder than PE and higher fusing point arranged.Because the PP temperature of homopolymer type was highly brittle when being higher than more than 0 ℃, therefore the PP material of many commerce is to add the Random copolymer RCP of 1～4% ethene or the pincers segmentation copolymer of height ratio ethylene contents more.The PP material of copolymer type has lower hot torsion temperature (100C), low transparency, low-luster, low rigidity, but stronger impact strength is arranged.The intensity of PP increases along with the increase of ethylene contents.The vicat softening temperature of PP is 150C.Because crystallinity is higher, the surperficial rigidity of this material and anti-zoned trace characteristic are fine.There is not the environmental stress cracking problem in the PP material.Usually, adopt the method that adds glass fibre, metal-containing addition or thermoplastic rubber that PP is carried out modification.The turnover rate MFR scope of PP is 1～40.The PP material shock resistance characteristic of low MFR is better but ductility/strength is lower.For the material of identical MFR, wanting of the intensity ratio homopolymer type of copolymer type is high.Because crystallization, the shrinkage percentage of PP is quite high, be generally 1.8～2.5%, and the direction homogeneity of shrinkage percentage is more far better than materials such as PE-HD, can make shrinkage percentage drop to 0.7% but add 30% glass additive, the PP material of homopolymer type and copolymer type does not all have resistibility to aromatic hydrocarbon (as benzene) solvent, chlorinated hydrocabon (carbon tetrachloride) solvent etc.
The PP that PP material of the present invention can be the homopolymer type also can be the PP material of copolymer type, and the PP material of homopolymer type and copolymer type all has good resistance to water soak, antiacid caustic corrosion, antilysis.The concrete PP that selects which kind of type decides according to the demand of specific product, also is as well known to those skilled in the art, does not repeat them here.
The present invention also provides the processing technology of above-mentioned packaging film for frozen potables, and the step summary of this processing technology gets up to comprise: unreel (outer BOPP printed layers) → be coated with (solvent-based adhesive) → extrude (PP+ look mother) → cool off (process of compound ectonexine) → rolling.
The invention provides the preparation method of above-mentioned packaging film for frozen potables, this method comprises:
(1). mother places container with PP with look, stirs, and obtains the compound of look mother and PP;
(2). will unreel as the film of printing protective cover; then at this film surface coating binder; compound with extruder that above-mentioned look is female and PP is extruded a side that makes its coating binder that places this film; and then through chill roll and compression roller; last rolling forms the packaging film for frozen potables of the structure of composite membrane that is made of printing protective cover and hot sealing layer.
The preparation method of the packaging film for frozen potables that provides in a preferred embodiment of the invention comprises:
(1) preparation of .PP and look female compound:
80-100 kilogram look mother added claim the PP particle of 900-920 kilogram to be placed in the container, mix and make it even by this weight; General stir about half an hour and can reach certain degree of uniformity.
(2). will unreel as the bidirectional stretching polypropylene film (outer BOPP printed layers) of printing protective cover; then at its surperficial coating solvent type adhesion agent; female and PP particle places described surface to be coated with on the bidirectional stretching polypropylene film of solvent-based adhesive with the look of aforementioned proportion with the expressing technique of extruder; and then (material is followed successively by bidirectional stretching polypropylene film to make it; solvent-based adhesive; look female and PP particle) through chill roll and compression roller; the packaging film for frozen potables of the structure of composite membrane that formation is made of printing protective cover and hot sealing layer; the printing protective cover of this packaging film is a bidirectional stretching polypropylene film, and this hot sealing layer is in a side of this printing protective cover.
Owing to consider production demand and cost impact, the thickness deviation of the final packaging film that forms should be controlled in the scope of 0-4um, exceed the quality problems that this scope promptly produces uneven distribution, certainly will cause whole volume film sudden and violent muscle phenomenon to occur, unfavorable factor such as packaging film sideslip problem when the actual production of workshop, occur, influence the ordinary production speed in workshop.And the technical requirements of general expressing technique in the thickness deviation that regular meeting problem of uneven distribution occurs thereby can not reach packaging film should be controlled at the scope of 0-4um; the contriver finds can avoid occurring the problem of uneven distribution to greatest extent by regulating the extruder head gap; therefore add an electronic machine that can show thickness at the place of extruding of extruder; purpose is that the thickness data that shows according to this electronic machine at any time in time carries out the extruder head gap adjustment; make the thickness deviation of the thickness data that this electronic machine shows in the 0-4um scope; the problem of uneven distribution has had very big change like this, controls and reached technical requirements and the technique effect of thickness deviation in the 0-4um scope of packaging film.
Above-mentioned extruder head gap is relevant with the size of the extruder head of extruder equipment, therefore cannot treat different things as the same, to those skilled in the art, extruder according to specific model, thickness display data with reference to electronic machine, it is to grope and can obtain by normal experiment in the 0-4um scope that adjusting extruder head gap makes it reach thickness deviation, and the known in this field at last or routine techniques of the process that normal experiment is groped does not repeat them here.For example the extruder head of extruder is 50mm, and the gap of extruder head can be 120s.
In another preferred embodiment of the present invention, because the material of hot sealing layer has increased 0.1-1%wtPE (gross weight of the material composition of this hot sealing layer is 100%) in forming, therefore, this preparation method also comprises:
(1). look mother, PP and PE are placed container, stir, obtain the compound of look mother, PP and PE;
(2). will unreel as the film of printing protective cover; then at this film surface coating binder; the compound of above-mentioned look mother, PP and PE is extruded a side that makes its coating binder that places this film with extruder; and then through chill roll and compression roller; last rolling forms the packaging film for frozen potables of the structure of composite membrane that is made of printing protective cover and hot sealing layer.
The preparation method of above-mentioned packaging film for frozen potables is preferably further comprising the steps of: set up an electronic machine that shows thickness at the place of extruding of described extruder, regulate the gap of extruder head according to the thickness data that shows on this instrument, make the thickness deviation of the thickness data that shows on this instrument in the 0-4um scope.
The production technology of heat-sealing film of the present invention also can compound to change dry type into compound by drenching film, dry type composite algorithm principle is at membrane surface coating one deck solvent-based adhesive, through the drying tunnel heat drying, solvent is fully volatilized, under the hot pressing state, be bonded into complex film with another kind of base material.Its material commonly used is: BOPP/VMCPP; BOPP/ pearly-lustre film; Delustring BOPP/ pearly-lustre film; BOPP/CPP etc. the compound cost of dry type drenches membrane compound technology relatively will be increased about 3%, the defective that the easy appearance of packing of product bag is opened from the side cruelly, and might produce chemical residual, therefore, membrane compound technology is preferably drenched in the present invention.
Beneficial effect of the present invention is: developed a kind of new packaging material " PP+ look mother " that can substitute cold drink tradition use " pearly-lustre OPP " material fully, equivalent material can reach the printing of original pearly-lustre OPP, its result of use is good, cost is than pearly-lustre OPP low 5.9%, can save more than 700 ten thousand yuan the whole year by 1.2 hundred million yuan of pearly-lustre film purchase costs calculating in 2008, meet the saving requirement of globalization, along with the increase saving amount of money of pearly-lustre film purchase cost can be bigger year by year, also opened up simultaneously the kind of cold drink flexible packaging industry, PP+ look mother need not to use adhesion agent at compound tense, can bring certain environmental protection effect like this, significantly reduce the injury that dissolvent residual causes health in the glue.
The specific embodiment
Describe technical scheme of the present invention and protection and practical range in detail below in conjunction with specific embodiment, but do not limit interest field of the present invention.
Embodiment 1.
Present embodiment provides a kind of packaging film for frozen potables, and this packaging film is the structure of double-ply complex film, and this double-ply complex film is respectively printing protective cover and hot sealing layer; Wherein, described printing protective cover is positioned at outermost layer, adopt conventional material for example bidirectional stretching polypropylene film BOPP film make, this printing protective cover has good printing adaptability, good dimensional stability, the glossiness transparency is good and possess defencive function; Described hot sealing layer is at the relative another side of printing protective cover, and this hot sealing layer adopts PP and look female two kinds of materials to make through the specified weight proportioning, and it is specifically formed proportioning (accounting for the percentum of this hot sealing layer material total weight) and is: the look mother accounts for 8%, and PP accounts for 92%.
The preparation method:
(1) preparation of PP+ look female compound:
80 kilograms of looks mothers and 920 kilograms of PP particles are claimed to be placed in the container, reach even with mixing half an hour;
(2) bidirectional stretching polypropylene film (as the printing protective cover of product) is unreeled; then at its surperficial coating solvent type adhesion agent; female and PP particle one side of solvent-based adhesive that made its coating that places bidirectional stretching polypropylene film with extruder (weight) ratiometric look of extruding 8: 92; the instrument of an electronic display thickness is set at the place of extruding of extruder; the gap of regulating extruder head according to the thickness display data makes the shown thickness deviation of this thickness display data in the 0-4um scope; and then make it common through chill roll and compression roller, be formed on the packaging film for frozen potables that is formed with the structure of composite membrane of hot sealing layer on the printing protective cover.
Embodiment 2.
A kind of packaging film for frozen potables of double-ply structure of composite membrane, this packaging film comprise printing protective cover and hot sealing layer; Wherein, described printing protective cover adopt conventional material for example bidirectional stretching polypropylene film BOPP film make, the advantage of this printing protective cover be have good printing adaptability, good dimensional stability, the glossiness transparency is good and possess defencive function; Described hot sealing layer is at printing protective cover opposite side, adopts to comprise that PP and look female two kinds of materials make through the specified weight proportioning, and it is specifically formed proportioning (accounting for the percentum of this hot sealing layer material total weight) and is: the look mother accounts for 9%, and PP accounts for 91%.
The preparation method:
(1) preparation of PP+ look female compound:
90 kilograms of looks mothers and 910 kilograms of PP particles are claimed to be placed in the container, reach even with mixing half an hour;
(2) bidirectional stretching polypropylene film (as the printing protective cover of product) is unreeled; then at its surperficial coating solvent type adhesion agent; female and PP particle one side of solvent-based adhesive that made its coating that places bidirectional stretching polypropylene film with extruder (weight) ratiometric look of extruding 9: 91; and then make it common through chill roll and compression roller, be formed on the packaging film for frozen potables that is formed with the structure of composite membrane of hot sealing layer on the printing protective cover.
Embodiment 3.
A kind of packaging film that comprises the structure of composite membrane of printing protective cover and hot sealing layer, this packaging film is mainly used in the external packing of frozen; Wherein printing protective cover adopts bidirectional stretching polypropylene film BOPP film to make, and therefore this printing protective cover has had good printing adaptability, the good transparent good and defencive function of dimensional stability, glossiness; Hot sealing layer wherein is in the printing protective cover outside, adopts to comprise that PP and look female two kinds of materials make through the specified weight proportioning, and it is specifically formed proportioning (accounting for the percentum of this hot sealing layer material total weight) and is: the look mother accounts for 10%, and PP accounts for 90%.
The preparation method:
(1) preparation of PP+ look female compound:
Female and 900 kilograms of PP particles place a container with 100 kilograms of looks, mix about half an hour to reach even;
(2) bidirectional stretching polypropylene film (as the printing protective cover of product) is unreeled; then at its surperficial coating solvent type adhesion agent; female and PP particle one side of solvent-based adhesive that made its coating that places bidirectional stretching polypropylene film with extruder (weight) ratiometric look of extruding 10: 90; in the connection of the place of extruding of extruder an electronic machine that can show thickness is set; the gap of regulating extruder head according to the thickness display data makes the shown thickness deviation of this thickness display data in the 0-4um scope; and then make it common through chill roll and compression roller, be formed on the packaging film for frozen potables that is formed with the structure of composite membrane of hot sealing layer on the printing protective cover.
Embodiment 4.
A kind of packaging film that comprises the structure of composite membrane of printing protective cover and hot sealing layer, this packaging film is the external packing of frozen; Wherein printing protective cover adopts bidirectional stretching polypropylene film BOPP film to make, and this bidirectional stretching polypropylene film BOPP membrane material and the printing protective cover of making thereof have good printing adaptability, good dimensional stability, the glossiness transparency is good and effect such as defencive function; Described hot sealing layer adopts PP, look mother and PE material to make through the specified weight proportioning in the relative side of printing protective cover, and its concrete composition (accounting for the percentum of this hot sealing layer material total weight): the look mother accounts for 8.5%, and PP accounts for 91%, and PE accounts for 0.5%.
The preparation method:
(1) preparation of PP+ look female compound:
Kilogram PP particle+5 a kilogram PE places a container altogether with 85 kilograms of look mother+910, mixes to make it even;
(2) bidirectional stretching polypropylene film (as the printing protective cover of product) is unreeled; then at its surperficial coating solvent type adhesion agent; extrude the female and PP+PE particle of the look of aforementioned proportion one side of solvent-based adhesive that made its coating that places bidirectional stretching polypropylene film with extruder; and then make it common through chill roll and compression roller, be formed on the packaging film for frozen potables that posts the structure of composite membrane of hot sealing layer on the printing protective cover.
Embodiment 5.
A kind of packaging film that comprises the structure of composite membrane of printing protective cover and hot sealing layer, this packaging film is the external packing of frozen; Wherein said hot sealing layer adopts PP, look parent material to make through the specified weight proportioning in a printing protective cover relative side, and it is specifically formed proportioning (accounting for the percentum of this hot sealing layer material total weight) and is: the look mother accounts for 8.3%, and PP accounts for 91.7%.
The preparation method:
(1) preparation of PP+ look female compound:
83 kilograms of look mother+917 kilogram PP particle is placed a container altogether, mix and make it even;
(2) bidirectional stretching polypropylene film (as the printing protective cover of product) is unreeled; then at its surperficial coating solvent type adhesion agent; extrude the female and PP particle of the look of aforementioned proportion one side of solvent-based adhesive that made its coating that places bidirectional stretching polypropylene film with extruder; and then make it common through chill roll and compression roller, be formed on the packaging film for frozen potables that is formed with the structure of composite membrane of hot sealing layer on the printing protective cover.
Claims (8)
1. packaging film for frozen potables; this packaging film is the complex film that comprises printing protective cover and hot sealing layer; the material of described hot sealing layer is formed and is comprised PP and look mother, and wherein the look mother accounts for the 8-10% of the material gross weight of this hot sealing layer, and PP accounts for the 90-92% of the material gross weight of this hot sealing layer.
2. packaging film for frozen potables as claimed in claim 1, wherein, described printing protective cover is a bidirectional stretching polypropylene film.
3. packaging film for frozen potables as claimed in claim 1, wherein, this packaging film is made of printing protective cover and hot sealing layer double-layer structure; Described printing protective cover is a bidirectional stretching polypropylene film; Described hot sealing layer is in a side of this printing protective cover, and this hot sealing layer is the pouring film that comprises that PP and look parent material are formed, and the percentum that described PP and look mother account for this hot sealing layer weight is: look female 8-10%, PP 90-92%.
4. packaging film for frozen potables as claimed in claim 1, wherein, the material of described heat-sealing film consists of: the look mother accounts for 8.5%, and PP accounts for 91%, and PE accounts for 0.5%.
5. the preparation method of the described packaging film for frozen potables of claim 1, this method comprises:
(1). mother places container with PP with look, stirs, and obtains the compound of look mother and PP;
(2). will unreel as the film of printing protective cover; then at this film surface coating binder; compound with extruder that above-mentioned look is female and PP is extruded a side that makes its coating binder that places this film; and then through chill roll and compression roller; last rolling forms the packaging film for frozen potables of the structure of composite membrane that is made of printing protective cover and hot sealing layer.
6. preparation method as claimed in claim 5, wherein, this method also comprises: set up an electronic machine that shows thickness at the place of extruding of described extruder, regulate the gap of extruder head according to the thickness data that shows on this instrument, make the thickness deviation of the thickness data that shows on this instrument in the 0-4um scope.
7. preparation method as claimed in claim 5, wherein, this method also comprises:
(1). look mother, PP and PE are placed container, stir, obtain the compound of look mother, PP and PE; Wherein, the look mother accounts for 8.5%, and PP accounts for 91%, and PE accounts for 0.5%;
(2). will unreel as the film of printing protective cover; then at this film surface coating binder; the compound of above-mentioned look mother, PP and PE is extruded a side that makes its coating binder that places this film with extruder; and then through chill roll and compression roller; last rolling forms the packaging film for frozen potables of the structure of composite membrane that is made of printing protective cover and hot sealing layer.
8. preparation method as claimed in claim 7, wherein, this method also comprises: set up an electronic machine that shows thickness at the place of extruding of described extruder, regulate the gap of extruder head according to the thickness data that shows on this instrument, make the thickness deviation of the thickness data that shows on this instrument in the 0-4um scope.
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| CN2009101283717A CN101508371B (en) | 2009-04-07 | 2009-04-07 | Packaging film for frozen potables and preparation method thereof |
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| CN2009101283717A CN101508371B (en) | 2009-04-07 | 2009-04-07 | Packaging film for frozen potables and preparation method thereof |
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| CN101508371B true CN101508371B (en) | 2011-02-02 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| DE102011086366A1 (en) * | 2011-11-15 | 2013-05-16 | Evonik Degussa Gmbh | Composite film and packaging produced therefrom |
| CN107283974A (en) * | 2016-04-11 | 2017-10-24 | 中国石化扬子石油化工有限公司 | A kind of packaging film of low heat-sealing temperature |
| CN106750727A (en) * | 2016-11-15 | 2017-05-31 | 苍南宇诺新材料科技有限公司 | Drink packing plastic formula |
| CN107698806A (en) * | 2017-08-28 | 2018-02-16 | 安徽巢湖南方膜业有限责任公司 | A kind of efficient deodorizing type shrinks the preparation method of composite package film and its application in closestool |
| CN110435274A (en) * | 2019-08-10 | 2019-11-12 | 福融辉实业（福建）有限公司 | A kind of pearly-lustre heat-sealing film and its preparation process |
| CN111267445B (en) * | 2020-03-05 | 2022-07-08 | 黄山永新股份有限公司 | Composite film label suitable for high-speed packaging and preparation method thereof |
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| JP2006022143A (en) * | 2004-07-06 | 2006-01-26 | Tokyo Printing Ink Mfg Co Ltd | Color master batch for thermoplastic resin and its manufacturing method |
| CN2801469Y (en) * | 2005-06-10 | 2006-08-02 | 沈志辉 | Packaging film used for packing ice cream brick and ice cream |
| WO2006102942A1 (en) * | 2005-04-01 | 2006-10-05 | Polfilm Co. | Multilayer bioriented film having antiseptic and improved stiffness features |
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| JP2006022143A (en) * | 2004-07-06 | 2006-01-26 | Tokyo Printing Ink Mfg Co Ltd | Color master batch for thermoplastic resin and its manufacturing method |
| WO2006102942A1 (en) * | 2005-04-01 | 2006-10-05 | Polfilm Co. | Multilayer bioriented film having antiseptic and improved stiffness features |
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