CN101723131B - Composite cold-seal packaging film with function of preventing high temperature conglutination and preparation method thereof - Google Patents
Composite cold-seal packaging film with function of preventing high temperature conglutination and preparation method thereof Download PDFInfo
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- CN101723131B CN101723131B CN2009102050767A CN200910205076A CN101723131B CN 101723131 B CN101723131 B CN 101723131B CN 2009102050767 A CN2009102050767 A CN 2009102050767A CN 200910205076 A CN200910205076 A CN 200910205076A CN 101723131 B CN101723131 B CN 101723131B
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Abstract
The invention discloses a cold-seal packaging film, in particular a composite cold-seal packaging film with a function of preventing high temperature conglutination. The structure of the composite cold-seal packaging film is that: the packaging film consists of release BOPP, INK, AD and MPET or MOPP and CS, wherein the release BOPP has no separation or transfer of pollutants, and can prevent the conglutination between the BOPP and the CS under the conditions of high temperature and high humidity. The product of the invention has no problem that the pollutants transfer to the internal layer of a packaging material or a cold-seal adhesive, and the problem of the conglutination between the BOPP and the CS under the conditions of high temperature and high humidity; production processing procedure without special process is the same as that of the normal cold-seal package; and the product has low comprehensive cost and stronger competitiveness.
Description
Technical field
The present invention relates to the cold envelope packaging film that a kind of packaging for foodstuff field is used, particularly relate to a kind of compound cold envelope packaging film and preparation method thereof with anti-high temperature adhesion function.
Background technology
The outstanding feature of cold envelope packaging film has: when the airtight involution of packing, need not heat, the involution that only the depended on pressure effect can be firm under the normal temperature state together; Cold package dress flat appearance, attractive in appearance; The packing speed of production is fast; Customer Yi Kaiqi.Therefore, in the packing of To Be Protected from Heat content such as chocolate, candy, biscuit, ice cream, and the fields such as packing of the emergency aid articles of pharmaceuticals industry and disinfection tool have obtained using widely.
At present, the structure of existing cold envelope packaging film mainly contains following four classes:
A:OPV (cold envelope protection gloss oil layer)/INK (ink lay)/MOPP (bidirectional stretching polypropylene film of aluminizing)/CS (cold seal glue);
B:OPV (cold envelope protection gloss oil layer)/INK (ink lay)/BOPP (bidirectional stretching polypropylene film)/CS (cold seal glue);
C:OPV (cold envelope protection gloss oil layer)/BOPP (bidirectional stretching polypropylene film)/INK (ink lay)/AD (adhesives)/MPET (aluminized mylar) or MOPP (bidirectional stretching polypropylene film of aluminizing)/CS (cold seal glue);
D:BOPP (bidirectional stretching polypropylene film)/INK (ink lay)/AD (adhesives)/MPET (aluminized mylar) or MOPP (bidirectional stretching polypropylene film of aluminizing)/CS (cold seal glue);
In the above structure; A, B belong to the cold package dress of table impression layer structure; the OPV (cold envelope protection gloss oil) of coating directly contacts with cold seal glue with the innermost layer of packing; OPV even INK (printing ink) often occur and be transferred on packing internal layer or the cold seal glue, pollute the contaminated and leak free problem fully of content or cold seal glue.The cold package of seal composite structure dress in C-structure belongs to, though printing ink can not shift in the centre, branch problem still appears in OPV, causes content to pollute or the contaminated and leak free problem fully of cold seal glue.The cold package dress of seal composite structure in the use at present of D structure is maximum, the situation that does not exist OPV or INK to shift, but, in storage and transport process, run into the problem that the CS (cold seal glue) of BOPP (bidirectional stretching polypropylene film) that the top layer often appears in hot and humid weather and internal layer is sticked together, cause whole coil packing material can't open and scrap.For this reason, the D infrastructure product is in storage and transport process, and the humiture that must control environment is used low temperature counter (temperature is lower than 30 ℃) transportation, thereby causes transport difficulty to strengthen the problem that traffic cost is high.
Summary of the invention
The objective of the invention is to, overcome the defective that existing cold envelope packaging film exists, and a kind of new compound cold envelope packaging film is provided, it neither exists any pollutants to transfer on packing internal layer or the cold seal glue, (temperature is not less than 50 ℃ can to tolerate hot and humid environment in the common transportation again, relative humidity is not less than 75%RH), BOPP and CS layer do not produce unacceptable adhesion problems, have anti-high temperature adhesion function.
Another object of the present invention provides a kind of production method and manufacture craft with the compound cold envelope packaging film of high temperature resistance adhesion function.
The object of the invention to solve the technical problems realizes by the following technical solutions.According to a kind of compound cold envelope packaging film that the present invention proposes, be the pattern that adopts release BOPP (bidirectional stretching polypropylene film) to cooperate with specific coating cold seal glue.The structure of compound cold envelope packaging film is: release BOPP (bidirectional stretching polypropylene film)/INK (ink lay)/AD (adhesives)/MPET (aluminized mylar) or MOPP (bidirectional stretching polypropylene film of aluminizing)/CS (cold seal glue); Described release BOPP rete is made up of release layer, transparent intermediate layer, transparent corona layer, and its layer thickness ratio is 1: 3: 1, outer field release layer contain 0.1～1.0% percentage by weight based on nanoscale TiO
2, SiO
2The release master batch of mold release contains simultaneously the high temperature resistant homo-polypropylene of 50～90% percentage by weights in the outer release layer prescription; Internal layer need carry out corona treatment, and following dynamo-electric dizzy value reaches more than 40 dyne, and stable back corona value reaches more than 38 dyne.
According to the compound cold envelope packaging film of the embodiment of the invention, described high temperature homo-polypropylene is the PP material with high-temperature stability, but heatproof reaches 140 ℃ or above temperature.
Compound cold envelope packaging film according to the embodiment of the invention, described coating cold seal glue be conventional be the glue of main component with the natural rubber, wherein be added with an amount of acrylic copolymer, anti fouling composition, defoamer, chemical stabilizer etc., its solid content is 55～60%.It locatees the internal layer that is coated on laminated film by the mode of intaglio plate coating.
The present invention also provides a kind of preparation method of compound cold envelope packaging film, and it may further comprise the steps:
A. release BOPP film, by 3 layer co-extruding biaxial stretched explained hereafter, the layer thickness ratio is 1: 3: 1, and skin is a release layer, and internal layer is the corona layer, and following dynamo-electric dizzy value reaches more than 40 dyne;
B. the pattern that needs in the internal layer corona surface printing of release BOPP film of the mode by intaghlio printing;
C. release BOPP film that will print by the compound mode of dry method and MPET (aluminized mylar) or MOPP (bidirectional stretching polypropylene film of aluminizing) are compound;
D. by the mode of intaglio plate location coating, at complex film release BOPP/MPET or semi-finished mylar face of MOPP or Biaxially oriented polypropylene face location coating cold seal glue, coating weight is 2～5g/m
2
E. with above coated compound cold envelope packaging film as required size cut, rolling, packing, make compound cold envelope packaging film finished product.
By the compound cold envelope packaging film that above technological process is produced, interlayer combined strength bination 〉=0.7N/15mm, cold sealing strength 〉=2N/15mm, the adhesion intensity≤0.5N/15mm of release BOPP and cold seal glue under the normal temperature; After in 70 ℃ of environment, carrying out 1 month high temperature resistant test, the adhesion intensity of release BOPP and cold seal glue still≤0.5N/15mm, not having any pollutants transfers on the cold seal glue or does not have any cold seal glue and transfer on the BOPP, cold sealing strength still 〉=2N/15mm, interlayer combined strength bination 〉=0.7N/15mm.
By technique scheme, compound cold envelope packaging film of the present invention has following advantage at least:
1) the present invention both contamination-free transfer to problem on packing internal layer or the cold seal glue, the problem of BOPP and CS adhesion under hot and humid condition not again.
2) the present invention is identical with conventional cold package dress product in production process, need not any equipment or technological transformation, has very high practical value.
3) the present invention makes that by saving the expense of accumulating link whole cost is low, has the higher market competitiveness.
Above-mentioned explanation only is the general introduction of technical solution of the present invention, for can clearer understanding technological means of the present invention, and can be implemented according to the content of specification sheets, and for above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, below especially exemplified by preferred embodiment, and conjunction with figs., be described in detail as follows.
Description of drawings
Fig. 1 is the structure composition diagram of compound cold envelope packaging film of the present invention.
Fig. 2 is the structure composition diagram of release BOPP film
The specific embodiment
Reach technological means and the effect that predetermined goal of the invention is taked for further setting forth the present invention, below in conjunction with accompanying drawing and preferred embodiment, to a kind of compound cold its specific embodiment of envelope packaging film, method, step, feature and the effect thereof that foundation the present invention proposes, describe in detail as after.
A kind of compound cold envelope packaging film of the present invention comprises being positioned at outermost release BOPP film that it is by 3 layer co-extruding biaxial stretched explained hereafter, the layer thickness ratio is 1: 3: 1, and skin is a release layer, and interlayer is the central, clear layer, internal layer is the corona layer, and following dynamo-electric dizzy value reaches more than 40 dyne.Gross thickness is 18 microns.Wherein, the layer thickness of release layer (top layer), central, clear layer and corona layer is followed successively by 2～4 microns, 10～12 microns, 2～4 microns.The high temperature resistant homo-polypropylene that contains 50～90% percentage by weights in the prescription of release layer, also contain simultaneously 0.1～1.0% percentage by weight based on nanoscale SiO
2, TiO
2The release master batch of mold release (antiblocking agent), other are plain polypropylene and conventional additives.Central, clear layer 2 is identical with the prescription of common BOPP film with corona layer 3.High temperature resistant homo-polypropylene is the PP material with high-temperature stability, but heatproof reaches 140 ℃ or above temperature, and it is a kind of high three-dimensional, the homopolymerization PP of systematicness, it compares the crystallinity height with general PP, is the rigidity of product and a kind of resin that resistance to effect of heat has essence to improve.Like this, the skin of release BOPP film has release preferably effect, prevents adhesion; The internal layer of release BOPP film need carry out corona treatment, and following dynamo-electric dizzy value reaches more than 40 dyne, and stable back corona value reaches more than 38 dyne.
The release layer 1 of release BOPP film is at the skin of compound cold envelope packaging film product, and specific cold seal glue 5 is at the internal layer of compound cold envelope packaging film product.When compound cold envelope packaging film product rolling, release BOPP release layer 1 and cold seal glue 5 direct contacts, stack from level to level.The finished product of harvest in the above described manner twists in the accumulating link, runs into hot and humid environment, BOPP and the cold seal glue phenomenon that can not stick together, and both separate easily; Simultaneously, release BOPP film release layer 1 no any pollutants breaks away from or transfers on packaging film internal layer or the cold seal glue, and the cold sealing strength of promptly compound cold envelope packaging film does not reduce.Described specific coating cold seal glue 5 be conventional be the glue of main component with the natural rubber, wherein be added with an amount of acrylic copolymer, anti fouling composition, defoamer, chemical stabilizer etc., its solid content is 55～60%.It locatees the internal layer that is coated on laminated film by the mode of intaglio plate coating.
The preparation method of this release BOPP thin film, it may further comprise the steps:
Batch mixing is with dry: each layer (release layer, central, clear layer, corona layer) raw material particle fully stirs, and it is mixed, and is carrying out the drying processing then;
Fusion and casting sheet: the fusion in extruder separately of each that mixes layer raw material, wherein, the more common BOPP of the melt temperature of release layer fills a prescription high slightly about 10 ℃, and the resin of fusion flows out by T type mouth mould, and be attached to the sharp cooling roll surface rapidly, form solid-state sheet material;
Biaxial tension: solid-state sheet material enters the biaxial tension position, at first carries out longitudinal stretching, carries out cross directional stretch then, forms the polypropylene film of biaxial tension;
Thickness measuring, corona and rolling: after the online thickness measurement of polypropylene film process through biaxial tension, beat corona treatment, be wound into half-blank then at the corona layer;
Ageing treatment with cut: the half-blank of above rolling is placed on the ageing treatment of carrying out certain hour in the specific temperature and humidity environment, and width cuts into rouleau as required then, is the release BOPP thin film finished product.
As shown in Figure 1, have the compound cold envelope packaging film of anti-high temperature adhesion function, 1 is release bidirectional stretching polypropylene film layer, and 2 is ink lay, and 3 is adhesives, and 4 are the bidirectional stretching polypropylene film of aluminizing, 5 cold seal glues for the location coating.Its structure of release BOPP film of the present invention is followed successively by from the outer to the inner: release BOPP (bidirectional stretching polypropylene film) 1, INK (ink lay) 2, AD (adhesives) 3, MPET (aluminized mylar) 4, CS (cold seal glue) 5.Adopt three-layer co-extruded stretch processes to produce as shown in Figure 2 release BOPP film, the layer thickness ratio is 1: 3: 1, and skin is a release layer 10, and interlayer is a central, clear layer 20, and internal layer is a corona layer 30, and following dynamo-electric dizzy value reaches more than 40 dyne;
The pattern that mode by intaghlio printing needs in the internal layer corona surface printing of release BOPP film;
Release BOPP film that will print by the compound mode of dry method and the face of aluminizing of MPET (aluminized mylar) are compound;
By the mode of intaglio plate location coating, at the semi-finished mylar face of complex film release BOPP/MPET location coating cold seal glue, coating weight is 4g/m
2
With above coated compound cold envelope packaging film as required size cut, rolling, packing, make compound cold envelope packaging film finished product.Compound cold envelope packaging film, interlayer combined strength bination 〉=1.0N/15mm, cold sealing strength 〉=2N/15mm, the adhesion intensity≤0.5N/15mm of release BOPP and cold seal glue under the normal temperature; After in 70 ℃ of environment, carrying out 1 month high temperature resistant test, the adhesion intensity of release BOPP and cold seal glue still≤0.5N/15mm, not having any pollutants transfers on the cold seal glue or does not have any cold seal glue and transfer on the BOPP, cold sealing strength still 〉=2N/15mm, interlayer combined strength bination 〉=1.0N/15mm.
Have the compound cold envelope packaging film of anti-high temperature adhesion function, its structure is: release BOPP (bidirectional stretching polypropylene film)/INK (ink lay)/AD (adhesives)/MOPP (bidirectional stretching polypropylene film of aluminizing)/CS (cold seal glue).As shown in Figure 1,1 is release bidirectional stretching polypropylene film layer, and 2 is ink lay, and 3 is adhesives, and 4 are the bidirectional stretching polypropylene film of aluminizing, 5 cold seal glues for the location coating.
Adopt three-layer co-extruded stretch processes to produce as shown in Figure 2 release BOPP film, the layer thickness ratio is 1: 3: 1, and skin is a release layer 10, and interlayer is a central, clear layer 20, and internal layer is a corona layer 30, and following dynamo-electric dizzy value reaches more than 40 dyne;
The pattern that mode by intaghlio printing needs in the internal layer corona surface printing of release BOPP film;
Release BOPP film that will print by the compound mode of dry method and the face of aluminizing of MOPP (bidirectional stretching polypropylene film of aluminizing) are compound;
By the mode of intaglio plate location coating, at the semi-finished bidirectional stretching polypropylene film face of complex film release BOPP/MOPP location coating cold seal glue, coating weight is 4.5g/m
2
With above coated compound cold envelope packaging film as required size cut, rolling, packing, make compound cold envelope packaging film finished product.Compound cold envelope packaging film, interlayer combined strength bination 〉=1.0N/15mm, cold sealing strength 〉=2N/15mm, the adhesion intensity≤0.5N/15mm of release BOPP and cold seal glue under the normal temperature; After in 70 ℃ of environment, carrying out 1 month high temperature resistant test, the adhesion intensity of release BOPP and cold seal glue still≤0.5N/15mm, not having any pollutants transfers on the cold seal glue or does not have any cold seal glue and transfer on the BOPP, cold sealing strength still 〉=2N/15mm, interlayer combined strength bination 〉=1.0N/15mm.
Compound cold envelope packaging film product of the present invention both contamination-free is transferred to problem on packing internal layer or the cold seal glue, again the problem of BOPP and CS adhesion under hot and humid condition not; Production process and common compound cold package are pretended together, need not special processing; Integrated cost is low, has stronger competitive power.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, though the present invention discloses as above with preferred embodiment, yet be not in order to limit the present invention, any those skilled in the art, in not breaking away from the technical solution of the present invention scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be not break away from the technical solution of the present invention content, according to technical spirit of the present invention to any simple modification that above embodiment did, equivalent variations and modification all still belong in the scope of technical solution of the present invention.
Claims (4)
1. compound cold envelope packaging film, it is characterized in that: this compound cold envelope packaging film structure from the outer to the inner is successively: release BOPP rete, ink lay, adhesive phase, aluminized mylar layer or the bidirectional stretching polypropylene film layer of aluminizing, and cold seal glue layer; Described release BOPP rete by release layer, transparent intermediate layer, and transparent corona layer form, its layer thickness ratio is 1: 3: 1, outer field release layer contain 0.1～1.0% percentage by weight based on nanoscale TiO
2, SiO
2The release master batch of mold release contains simultaneously the high temperature resistant homo-polypropylene of 50～90% percentage by weights in the outer release layer prescription.
2. compound cold envelope packaging film according to claim 1 is characterized in that: described high temperature resistant homo-polypropylene is the PP material with high-temperature stability, but heatproof reaches 140 ℃ or above temperature.
3. compound cold envelope packaging film according to claim 1, it is characterized in that: described cold seal glue layer be conventional be the glue of main component with the natural rubber, wherein be added with an amount of acrylic copolymer, anti fouling composition, defoamer, chemical stabilizer, its solid content is 55～60%; And locate the internal layer that is coated on laminated film by the mode of intaglio plate coating.
4. the preparation method of a compound cold envelope packaging film is characterized in that it may further comprise the steps:
A. release BOPP film, by 3 layer co-extruding biaxial stretched explained hereafter, release layer, transparent intermediate layer, transparent corona layer by layer between the thickness ratio be 1: 3: 1, following dynamo-electric dizzy value reaches more than 40 dyne;
B. the pattern that needs in the internal layer corona surface printing of release BOPP film of the mode by intaghlio printing;
C. release BOPP film that will print by the compound mode of dry method and aluminized mylar or the bidirectional stretching polypropylene film of aluminizing are compound;
D. by the mode of intaglio plate location coating, at complex film release BOPP aluminized mylar or semi-finished mylar face of the bidirectional stretching polypropylene film of aluminizing or Biaxially oriented polypropylene face location coating cold seal glue, coating weight is 2～5g/m
2
E. with above coated compound cold envelope packaging film as required size cut, rolling, packing, make compound cold envelope packaging film finished product.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102050767A CN101723131B (en) | 2009-10-22 | 2009-10-22 | Composite cold-seal packaging film with function of preventing high temperature conglutination and preparation method thereof |
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|---|---|---|---|
| CN2009102050767A CN101723131B (en) | 2009-10-22 | 2009-10-22 | Composite cold-seal packaging film with function of preventing high temperature conglutination and preparation method thereof |
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| CN101723131A CN101723131A (en) | 2010-06-09 |
| CN101723131B true CN101723131B (en) | 2011-12-28 |
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| CN104513635B (en) * | 2014-12-10 | 2016-08-24 | 斯迪克新型材料（江苏）有限公司 | A kind of false proof noiseless adhesive tape manufacture method |
| CN108099432A (en) * | 2017-12-25 | 2018-06-01 | 安徽省临泉县万隆塑料包装有限公司 | A kind of printing process of plastic packaging bag |
| CN109263209B (en) * | 2018-09-26 | 2021-04-02 | 黄山源点新材料科技有限公司 | Transparent barrier packaging film sealed at normal temperature and preparation method thereof |
| CN111471406A (en) * | 2020-03-26 | 2020-07-31 | 广东宝佳利绿印股份有限公司 | High-barrier cold-seal packaging film and preparation method thereof |
| CN113956816A (en) * | 2021-11-25 | 2022-01-21 | 东莞澳中新材料科技股份有限公司 | High-temperature-resistant and easily-unwound composite expansion adhesive tape and preparation method and application thereof |
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