CN103252960B - A kind of wear-resisting cigarette pack film and production method thereof - Google Patents
A kind of wear-resisting cigarette pack film and production method thereof Download PDFInfo
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- CN103252960B CN103252960B CN201310227398.8A CN201310227398A CN103252960B CN 103252960 B CN103252960 B CN 103252960B CN 201310227398 A CN201310227398 A CN 201310227398A CN 103252960 B CN103252960 B CN 103252960B
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Abstract
The present invention is directed to the degree of crystallinity that there is random PP hot sealing layer in the three-decker of existing cigarette film low, hardness is little, the shortcoming of easy mill flower, adopts the method for coating and printing position different on cigarette pack film to print polyacrylic acid ester layer and UV solidified coating respectively.That the hot sealing layer of existing three-layer co-extruded smoke film adopts is copolymerization PP, method is Screw Extrusion, slab, stretching, obtain after thermal finalization, and the present invention's employing is carry out coating by polyacrylate solution on BOPP heat-shrinkable film layer, hot sealing layer is obtained after drying, and the glue of the transparency adopted between BOPP heat-shrinkable film layer and polyacrylic acid ester layer bonds, ensure that the adhesion of polyacrylic acid ester layer and BOPP heat-shrinkable film layer.
Description
Technical field
The invention belongs to thin film fabrication techniques field, specifically, relate to a kind of wear-resisting cigarette pack film and production method thereof.
Background technology
Bidirectional stretching plastic film is formed through the special processing of the means such as physics, chemistry, machinery, lower than film melting points, higher than under vitrification point, vertical and horizontal stretching is carried out to thick film or plain film, then carries out thermal finalization process in a tensioned state and obtained goods.Biaxially oriented polypropylene (BOPP) film is exactly obtain in this way.Because both direction has all carried out the stretching of certain multiple in length and breadth, make molecule segment orientation, degree of crystallinity raising, therefore hot strength, the tensile modulus of elasticity of film be can significantly improve, heat resistance, cold resistance, the transparency, air-tightness and electric insulating quality etc. improved.
Packing cigarette film is called for short cigarette film, and cigarette film is the one of BOPP film.Cigarette film is a kind of high-grade BOPP film, has the heat-shrinkable etc. of low heat-sealing temperature, better barrier property, the high grade of transparency, thickness evenness and excellence compared with ordinary packing film.
Cigarette film be adopt three-layer co-extruded go out technique produce, its structure has A/B/C structure and A/B/A structure, A/B/C is one side process structure, PP (for random copolymerization PP), the high-performance slipping agent of low heat-sealing temperature is had in extexine A, sandwich layer B component has the additives such as homopolymerization PP, anti-blocking agent, antistatic additive, and endosexine C composition has low heat-sealing temperature PP, slipping agent.The both sides structure of A/B/A structure is identical.In cigarette film, the polypropylene homopolymer of sandwich layer is the principal element determining thin film physics mechanical performance, and it is the polymer of the partially crystallizable produced through polymerization by propylene monomer.And hot sealing layer is made up of the PP of random copolymerization, degree of crystallinity is low, and softening point is low, can produce good heat sealability when heating.
But, for a long time, exist because of mounted box (or case), transport at the outer packing surface of cigarette carton bag and parcel, provide and deliver and cause friction, formation one is white powdery appearance round and round, its distributing position is not fixed, phenomenon that tobacco business is generally referred to as " mill flower ", this phenomenon is particularly evident on dark box skin.Especially, when cigarette carton reloads casing storage after wrapping in sale displaying, because binning process discal patch bag not only rubs with cabinet wall, and the friction between bar bag also can not be ignored.Usually at cigarette film outer surface covered with dust etc., the degree of grinding flower can have been increased the weight of in friction process in displaying process.Due to phase mutual friction between bar with bar in the various transport of before sales, delivery process, cause cigarette film surface tear, mist degree to increase, have a strong impact on bar bag attractive in appearance.Grind the tobacco bale spent and destroy tobacco bale original dress sulphur effect and attractive in appearance, make consumer create bad sense.
Reason is caused to be:
1, because BOPP cigarette film has higher requirement to heat sealability, that therefore top layer raw material adopts is the random copolymerization PP that can provide low heat-sealing temperature, and the product produced is heat-sealing film.Heat-sealing film has good heat sealability, but due to the random copolymerization PP molecular weight distribution on its top layer wider, fusing point is lower, and crystallizing power is relatively poor, and thus after film forming, top layer degree of crystallinity is not high, face lower hardness.When being no matter packaging with metal or transport, display time rub with film, all can make the molecular state on film surface, distribution plasticity change occurs, generation polishing scratch, and then generation is ground and is spent phenomenon.
2, the opening agent Granular composite moved to film top layer from sandwich layer is wider, do not have well-regulated profile, and hardness is larger.Be exactly the dust granule being attached to top layer when transport, display in addition, hardness is larger.Make film produce cut and scratch phenomenon after these harder particles and softer film surface rub, affect film appearance.
Summary of the invention
Instant invention overcomes shortcoming of the prior art, provide a kind of wear-resisting cigarette pack film and production method thereof, under the prerequisite of the heat sealability and thermal contraction performance that do not affect cigarette pack film, substantially increase the wearability of film, the flatness of film does not have significant change simultaneously, and the transparency of film does not obviously decline.
In order to solve the problems of the technologies described above, the present invention is achieved by the following technical solutions:
A kind of wear-resisting cigarette pack film, comprise BOPP thin layer, described BOPP thin layer upper and lower surface is equipped with polyacrylic acid ester layer, and the polyacrylic acid ester layer of described BOPP thin layer upper surface is provided with some pits, fills transparent UV solidified coating in described pit.
Further, described BOPP thin layer and polyacrylic acid ester layer are bonding by transparent glue.
Further, described polyacrylic acid ester layer with the addition of antistatic additive, slipping agent, antiblocking agent, and wherein antistatic additive is polyol ester class and polyoxyethylene alkyl amine surfactants, and concentration is 500 ~ 1500 weight ppm.
Further, described slipping agent is amide substance, and concentration is 300 ~ 1800 weight ppm.
Further, described antiblocking agent is one or more mixtures in silica, titanium dioxide, calcium carbonate, and its concentration controls at 200 ~ 1800 weight ppm.
Further, the polyacrylate layer thickness of described BOPP thin layer lower surface is 0.8 μm.
Further, described pit is the pit of rectangle, and the degree of depth of this pit is 0.1 ~ 0.5 μm.
A production method for wear-resisting cigarette pack film, comprises the following steps:
1) at the glue layer that the upper and lower surface precoating last layer of BOPP thin layer is transparent, then dry;
2) on the lower surface glue layer of BOPP thin layer, be coated with last layer polyacrylate solution, polyacrylic acid ester layer drying Post RDBMS, produces good bonding with glue layer;
3) on the upper surface of BOPP thin layer, print one deck polyacrylate solution, polyacrylic acid ester layer is provided with some pits, and polyacrylic acid ester layer drying Post RDBMS, produces good bonding with glue layer;
4) print at pit the transparent UV solidified coating that a layer thickness can fill and lead up pit, the thickness of whole film be consistent,
5) there is cross-linking and curing reaction in this transparent UV solidified coating after UV-irradiation, forms wear-resisting cigarette pack film.
Further, described polyacrylate solution is that polyacrylate is dissolved in butanone and ethyl acetate and is made into, and the solid content of solution controls 10% ~ 60%
Compared with prior art, the invention has the beneficial effects as follows:
The present invention is directed to the degree of crystallinity that there is random PP hot sealing layer in the three-decker of existing cigarette film low, hardness is little, the shortcoming of easy mill flower, adopts the method for coating and printing position different on cigarette pack film to print polyacrylic acid ester layer and UV solidified coating respectively.Due to cigarette pack, the position of its needs heat-sealing is side and the bottom of carton.Therefore, local at these, the polyacrylate coatings with heat sealability that thin layer adopts, and in the upper and lower surface of cigarette case, film adopt time there is the UV cured layer of excellent wear-resisting property.Heat sealability and wearability can be met so simultaneously.That the hot sealing layer of existing three-layer co-extruded smoke film adopts is copolymerization PP, method is Screw Extrusion, slab, stretching, obtain after thermal finalization, and the present invention's employing is carry out coating by polyacrylate solution on BOPP thin layer, after drying, obtain hot sealing layer.Polyacrylate coatings has good heat sealability, can meet the requirement of cigarette film packaging to heat sealability.And the glue of the transparency adopted between BOPP thin layer and polyacrylic acid ester layer bonds, ensure that the adhesion of polyacrylic acid ester layer and BOPP thin layer.
In addition, the present invention has also printed UV solidified coating on the ad-hoc location of the upper surface layer of film, after ultraviolet light polymerization, intermolecular create crosslinked, formation hardness is high, the UV light solidifying coating that anti-wear performance is good, transparency is high and the good polyacrylate coatings of heat sealability.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, together with embodiments of the present invention for explaining the present invention, is not construed as limiting the invention, in the accompanying drawings:
Fig. 1 is the transversal schematic diagram of a kind of wear-resisting cigarette pack film of the present invention;
Fig. 2 is the top view of a kind of wear-resisting cigarette pack film of the present invention.
1---BOPP thin layer; 2---polyacrylic acid ester layer;
3---UV solidified coating; 4---glue layer.
Detailed description of the invention
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein is only for instruction and explanation of the present invention, is not intended to limit the present invention.
Consult Fig. 1,2, the wear-resisting cigarette pack film of one of the present invention, comprise BOPP thin layer 1, BOPP thin layer 1 upper and lower surface is equipped with polyacrylic acid ester layer 2, the polyacrylic acid ester layer 2 of BOPP thin layer 1 upper surface is provided with some pits, it is bonding that pit transparent UV solidified coating 3, the BOPP thin layer 1 of interior filling and polyacrylic acid ester layer 2 pass through transparent glue.
The BOPP film produced by homopolymerization PP that the film substrate that the present invention uses is single layer structure, its layer thickness is 17 ~ 19 μm.Its technological process is as follows:
------two-sided pre-cementing------dries-------one side coating------oven dry------------oven dry------------UV-irradiation-----cutting------rolling that be printed on one side UV coating that be printed on one side polyacrylate coatings to film substrate.
Its concrete grammar is as follows:
1, first at the glue layer 4 that the upper and lower surface precoating last layer of BOPP thin layer 1 is transparent, then dry.Object is the adhesion in order to improve between BOPP thin layer 1 and coating, the thickness about 0.5 ~ 0.1 μm after the oven dry of this glue layer 4.
2 and then be coated with last layer polyacrylate solution on the lower surface of this film, form polyacrylic acid ester layer 2, this solution is that polyacrylate is dissolved in butanone and ethyl acetate and is made into, and the solid content of solution controls 10% ~ 60%.Except polyacrylate, also added antistatic additive, slipping agent in solution, antiblocking agent, wherein antistatic additive is polyol ester class and polyoxyethylene alkyl amine surfactants, concentration is 500 ~ 1500 weight ppm, and other concentration will affect antistatic behaviour and the transparency of this film; Slipping agent is amide substance, and concentration is 300 ~ 1800 weight ppm, and other concentration will affect smoothness and the transparency of this film; Antiblocking agent is one or more mixtures in silica, titanium dioxide, calcium carbonate, and its concentration controls at 200 ~ 1800 weight ppm, and this concentration resistance to blocking is good, and other concentration cannot obtain optimum efficiency on this film.The thickness of the polyacrylic acid ester layer 2 of lower surface is 0.8 μm, and the transparency is best.Coating drying Post RDBMS, produces good bonding with glue layer 4, forms transparency high, the hot sealing layer that adhesion is strong.
3, on the upper surface of film, print one deck polyacrylate solution, its type shape on the cross section of film is " recessed " font, and sees on the surface of film, then there is the pit of rectangle one by one.The degree of depth of this pit is 0.1 ~ 0.5 μm, and this degree of depth is after the transparent UV solidified coating 3 of filling, and transparency is best, more shallow or comparatively deeply all can not get optimum efficiency.The longitudinal direction of two pits and transverse pitch are respectively a wide size with growing of packaging unit.Size required when the concrete size of the pattern that this printing is formed and containers of cigarettes is closely related.The thickness of this coating highest point is 0.8 μm, and transparency is best, more shallow or comparatively deeply all can not get optimum efficiency.Also with the addition of a certain amount of antistatic additive, slipping agent, antiblocking agent.The concentration of above composition is at 200 ~ 1800 weight ppm, and other concentration will affect the high and wearability of its transparency, hardness.Coating drying Post RDBMS, produces good bonding with glue layer 4, forms transparency high, the hot sealing layer that adhesion is strong.
4, print at pit the transparent UV solidified coating 3 that a layer thickness can fill and lead up " recessed " word place.The thickness of whole film is consistent, and the flatness of film is higher.Also a certain amount of antistatic additive, slipping agent is with the addition of, antiblocking agent in this transparent UV solidified coating 3.There is cross-linking and curing reaction in this transparent UV solidified coating 3, the coating that formation anti-wear performance, properties of transparency are all very excellent after UV-irradiation.
Existing cigarette film be all adopt three-layer co-extruded method produce, its upper and lower surface is hot sealing layer, employing be copolymerization PP, its hot sealing layer due to top layer degree of crystallinity after copolymerization PP film forming not high, face lower hardness.When being no matter packaging with metal or transport, display time rub with film, the molecular state generation plasticity on film surface all can be made to change, generation polishing scratch, and then generation is ground and is spent phenomenon.
Compared with extruding the method for stretching film forming with existing employing COPP, the present invention does not need heat-sealing place to stencil one deck UV solidified coating 3 in cigarette film packaging, and the molecule of this UV solidified coating 3 produces crosslinked under the action of uv light and solidifies.Because strand is cross-linked with each other, the hardness of this coating is higher, and anti-wear performance is good, solves the problem of easily millization in the processes such as cigarette film packaging, transport, improves the quality of cigarette film.
Last it is noted that these are only the preferred embodiments of the present invention; be not limited to the present invention; although with reference to embodiment to invention has been detailed description; for a person skilled in the art; it still can be modified to the technical scheme described in foregoing embodiments; or equivalent replacement is carried out to wherein portion of techniques feature; but it is within the spirit and principles in the present invention all; any amendment of doing, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. a wear-resisting cigarette pack film, it is characterized in that: comprise BOPP thin layer, described BOPP thin layer upper and lower surface is equipped with polyacrylic acid ester layer, the polyacrylic acid ester layer of described BOPP thin layer upper surface is provided with some pits, transparent UV solidified coating is filled in described pit, described polyacrylic acid ester layer with the addition of antistatic additive, slipping agent, antiblocking agent, wherein antistatic additive is the mixture of polyol ester class and polyoxyethylene alkyl amine surfactants, concentration is 500 ~ 1500 weight ppm, described slipping agent is amide substance, concentration is 300 ~ 1800 weight ppm, described antiblocking agent is silica, titanium dioxide, one or more mixtures in calcium carbonate, its concentration controls at 200 ~ 1800 weight ppm.
2. the wear-resisting cigarette pack film of one according to claim 1, is characterized in that: it is bonding that described BOPP thin layer and polyacrylic acid ester layer pass through transparent glue.
3. the wear-resisting cigarette pack film of one according to claim 1, is characterized in that: the polyacrylate layer thickness of described BOPP thin layer lower surface is 0.8 μm.
4. the wear-resisting cigarette pack film of one according to claim 1, is characterized in that: described pit is the pit of rectangle, the degree of depth of this pit is 0.1 ~ 0.5 μm.
5. the production method of a kind of wear-resisting cigarette pack film according to claim 1, is characterized in that: comprise the following steps:
1) at the glue layer that the upper and lower surface precoating last layer of BOPP thin layer is transparent, then dry;
2) on the lower surface glue layer of BOPP thin layer, be coated with last layer polyacrylate solution, polyacrylic acid ester layer drying Post RDBMS, produces good bonding with glue layer;
3) on the upper surface of BOPP thin layer, print one deck polyacrylate solution, polyacrylic acid ester layer is provided with some pits, and polyacrylic acid ester layer drying Post RDBMS, produces good bonding with glue layer;
4) print at pit the transparent UV solidified coating that a layer thickness can fill and lead up pit, the thickness of whole film be consistent,
5) there is cross-linking and curing reaction in this transparent UV solidified coating after UV-irradiation, forms wear-resisting cigarette pack film.
6. the production method of a kind of wear-resisting cigarette pack film according to claim 5, is characterized in that: described polyacrylate solution is that polyacrylate is dissolved in butanone and ethyl acetate and is made into, and the solid content of solution controls 10% ~ 60%.
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103819994B (en) * | 2014-01-27 | 2016-01-20 | 中科院广州化学有限公司 | A kind of polypropylene film coating UV light-cured acrylate aqueous polymer dispersion |
| CN103865351B (en) * | 2014-02-21 | 2016-12-07 | 中科院广州化学有限公司 | BOPP coating UV light-solidifying poly acrylate-chlorinated polypropylene composite aqueous emulsion and its preparation method and application |
| CN106400600A (en) * | 2016-06-21 | 2017-02-15 | 立华彩印（昆山）有限公司 | Low-cost scratch-resistant wear-resistant colored box paper |
| CN107697483A (en) * | 2017-11-16 | 2018-02-16 | 云南红塔塑胶有限公司 | A kind of cigarette case liner |
| CN114015281B (en) * | 2021-11-22 | 2023-03-17 | 金华市奇昇新材料有限公司 | Polystyrene plastic sealing film and preparation method thereof |
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| JP3324975B2 (en) * | 1997-12-04 | 2002-09-17 | 株式会社トクヤマ | Stretch packaging film |
| JP2005289471A (en) * | 2004-04-01 | 2005-10-20 | Taisei Lamick Co Ltd | Packaging film excellent in heat resistance and heat sealing capability |
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| CN1646312A (en) * | 2002-03-30 | 2005-07-27 | 汉高两合股份公司 | Multilayered films |
| CN102085735A (en) * | 2010-11-09 | 2011-06-08 | 浙江大东南包装股份有限公司 | Multifunctional BOPP (Biaxially-oriented Polypropylene) cigarette packaging film and manufacture method thereof |
| CN102619135A (en) * | 2012-03-28 | 2012-08-01 | 广州荣域实业有限公司 | Novel aluminum-free lining paper coating for cigarette package and preparation method thereof |
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