CN103009751B - Biaxial stretching polypropylene high heat-seal film and manufacturing method thereof - Google Patents
Biaxial stretching polypropylene high heat-seal film and manufacturing method thereof Download PDFInfo
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- CN103009751B CN103009751B CN201210570487.8A CN201210570487A CN103009751B CN 103009751 B CN103009751 B CN 103009751B CN 201210570487 A CN201210570487 A CN 201210570487A CN 103009751 B CN103009751 B CN 103009751B
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- oriented polypropylene
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- 239000004743 Polypropylene Substances 0.000 title abstract description 7
- 238000004519 manufacturing process Methods 0.000 title abstract description 7
- -1 polypropylene Polymers 0.000 title abstract description 7
- 229920001155 polypropylene Polymers 0.000 title abstract description 7
- 238000007789 sealing Methods 0.000 claims description 25
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 20
- 229920006378 biaxially oriented polypropylene Polymers 0.000 claims description 18
- 239000011127 biaxially oriented polypropylene Substances 0.000 claims description 18
- 229920001577 copolymer Polymers 0.000 claims description 18
- 239000002994 raw material Substances 0.000 claims description 14
- 239000000377 silicon dioxide Substances 0.000 claims description 10
- 238000005096 rolling process Methods 0.000 claims description 9
- 150000001412 amines Chemical class 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 claims description 5
- 229920006228 ethylene acrylate copolymer Polymers 0.000 abstract 1
- 239000010408 film Substances 0.000 description 25
- 238000000034 method Methods 0.000 description 10
- 238000004806 packaging method and process Methods 0.000 description 9
- 238000002156 mixing Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 3
- 230000000873 masking effect Effects 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 241001122767 Theaceae Species 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
Landscapes
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
The invention discloses a biaxial stretching polypropylene high heat-seal film and a manufacturing method thereof; aiming at the problem of low strength of current biaxial stretching polypropylene heat-sealable films, the manufacturing method of the invention prepares the biaxial stretching polypropylene high heat-seal film by adding ethylene-acrylate copolymer into various layers and controlling the thickness of heat-seal layers, that is an upper layer and a lower layer, to be within 2-5 microns; the biaxial stretching polypropylene high heat-seal film of the invention has a heat-seal strength value of 9-15N/15 mm under a condition with a heat-seal temperature of 130 DEG C and heat-seal time of 0.3 second, can reach requirements of food package, and also has good physical mechanical properties.
Description
Technical field
The present invention relates to a kind of Biaxially oriented polypropylene height heat-sealing film and manufacture method thereof, belong to technical field of macromolecules.
Background technology
The consumption that the biaxially oriented polypropylene film of heat-sealing type is annual in the whole nation has hundreds of thousands ton, be widely used in cigarette pack, Key works Drug packing, tea packaging, cosmetic package and some other commodity packaging, but be directly used in packaging for foodstuff little, main cause is that the heat seal strength of current heat sealing type biaxial-tension polypropylene is less, be generally less than 4N/15mm, stressed extruding can separate in handling process with the food of this heat seal strength involution packaging, cause bale broken, as to be used for packaging for foodstuff must and PE or CPP film compound, production cost can be improved like this and cause environmental issue.CN200810177464 application discloses a kind of heat sealing type biaxial-tension polypropylene film, it by adding the heat seal strength that propene-1-butene copolymer improves film in hot sealing layer and sandwich layer, but propene-1-butene copolymer is the polymer of one very " soft ", its membership that adds significantly reduces thin film strength, although heat sealability improves, but the reduction of intensity can make film easily break, be unfavorable for packaging.
Summary of the invention
In order to solve the problems referred to above that prior art exists, the object of this invention is to provide a kind of Biaxially oriented polypropylene height heat-sealing film, its heat seal strength is high, can be directly used in packaging for foodstuff without the need to compound, and film strength is constant or slightly improve, advantageously in packaging for foodstuff compared with existing heat-sealing film.Another object of the present invention is to provide the preparation method of Biaxially oriented polypropylene height heat-sealing film.
Biaxially oriented polypropylene height heat-sealing film of the present invention, its structure is divided into upper, middle and lower-ranking structure, gross thickness: 18 ~ 36 μm.Upper thickness is 2 ~ 5 μm, is mixed with by the raw material of following weight percent: 83 ~ 94% COPPs, 5 ~ 15% vinyl-acrylate copolymers and 1 ~ 2% synthetic silica; The thickness in intermediate layer is 14 ~ 26 μm, is mixed with by the raw material of following weight percent: 82 ~ 94% HOPPs, 5 ~ 15% vinyl-acrylate copolymers and 1 ~ 3% ethoxylated amine; Lower thickness is 2 ~ 5 μm, is mixed with by the raw material of following weight percent: 83 ~ 94% COPPs, 5 ~ 15% vinyl-acrylate copolymers and 1 ~ 2% synthetic silica.
The preparation method of Biaxially oriented polypropylene height heat-sealing film of the present invention, by preparing burden, extruding, slab, longitudinal stretching, cross directional stretch, rolling prepare, and wherein, the stretching ratio of longitudinal stretching operation is 485 ~ 530%; The stretching ratio of cross directional stretch operation is 800 ~ 1000%; The extruder temperature extruded in operation is 190 ~ 240 DEG C; Slab machine chilling temperature in slab operation is 18 ~ 32 DEG C; Preheat temperature in longitudinal stretching operation is 102 ~ 133 DEG C, draft temperature is 80 ~ 113 DEG C; Preheat temperature in cross directional stretch operation is 150 ~ 185 DEG C, draft temperature is 140 ~ 170 DEG C, setting temperature is 135 ~ 165 DEG C.
The detailed process of Biaxially oriented polypropylene height heat-sealing film preparation method of the present invention is:
(1) adopt biaxial tension equipment to implement, technological process is: → slab → longitudinal stretching → cross directional stretch → rolling of preparing burden → extrude.
(2) implementation step
1, prepare burden
Drop into different batch cans by the raw material of above-mentioned design, carry out batch mixing in the ratio of setting, batch mixing can manually batch mixing or equipment batch mixing.
2, extrude
Intermediate layer raw material flows into double screw extruder or singe screw tandem extruder after batch mixing, and upper and lower layered material flows into respective subsidiary extruder after batch mixing.Three layered materials flow out after die head converges.Extruder effect: melting, plasticizing, mixing, equal and quantitative are extruded.Extruder temperature: 190 ~ 240 DEG C.
3, slab
The effect of slab machine is that the resin that extruder die head flows out is cooled to sheet material, makes the size of the degree of crystallinity of resin, crystal habit, crystal reach perfect condition, thus improves the physical property of film, be conducive to the stretching of vertical and horizontal.Slab machine chilling temperature: 18 ~ 32 DEG C.
4, longitudinal stretching
The effect of longitudinal stretching is that the sheet material of coming from slab machine is carried out preheating, and under certain speed, is longitudinally elongated by sheet material, polymer molecule is carried out machine-direction oriented.For ensureing longitudinal contraction rate, the preheat temperature of longitudinal stretching and draft temperature are low as far as possible, and stretching ratio is high as far as possible, and preheat temperature is best: 102 ~ 133 DEG C, draft temperature: 80 ~ 113 DEG C, stretching ratio: 485 ~ 530%.
5, cross directional stretch
To be the sheet material crossed by longitudinal stretching carry out cross directional stretch by the chain guide of setting there being the drawing zone of the larger angle of flare in cross directional stretch effect, makes polymer molecule at horizontal orientation equally; Preheat temperature is best: 150 ~ 185 DEG C, draft temperature: 140 ~ 170 DEG C, setting temperature: 135 ~ 165 DEG C, stretching ratio is best 800 ~ 1000%.
6, rolling
The horizontal film pulled out carries out rolling through winder again after trimming.Winding process is relevant with the performance of film, can follow according to rolling situation setting winding tension, attenuation rate, platen pressure adjustment, draw ratio 100 ± 2%.
The present invention is by adding vinyl-acrylate copolymer in layers and hot sealing layer and upper and lower layer thickness being controlled to have prepared Biaxially oriented polypropylene height heat-sealing film at 2 ~ 5 μm, it is 130 DEG C at heat-sealing temperature, the heat-sealing time is under the condition of 0.3 second, heat seal strength value is 9-15N/15mm, the requirement of packaging for foodstuff can be reached, and also there is good physical and mechanical properties simultaneously.
Product representative value
Detailed description of the invention
Specific embodiment is described further Biaxially oriented polypropylene height heat-sealing film of the present invention and manufacture method thereof below.
Embodiment 1
Produce thickness 23 μm of films.Batching: upper thickness 4 μm, wherein raw material comprises 88% COPP, 10% vinyl-acrylate copolymer and 2% synthetic silica; Middle thickness 15 μm, wherein raw material comprises 88% HOPP, 10% vinyl-acrylate copolymer and 2% ethoxylated amine; Lower thickness 4 μm, wherein raw material comprises 88% COPP, 10% vinyl-acrylate copolymer and 2% synthetic silica.
Masking: adopt biaxial tension co-extrusion technique to obtain Biaxially oriented polypropylene high heat-sealing strength film of the present invention, wherein extruder temperature: 235 DEG C; Slab machine temperature: 25 DEG C; Longitudinal stretching multiplying power: 493%; Indulge and draw preheat temperature: 112 DEG C; Indulge and draw draft temperature: 100 DEG C; Cross directional stretch multiplying power: 920%; Horizontally draw preheat temperature: 173 DEG C; Horizontally draw draft temperature: 155 DEG C; Horizontally draw setting temperature: 144 DEG C; Rolling draw ratio: 100%.
Embodiment 2
Produce thickness 30 μm of films.Batching: upper thickness 5 μm, wherein raw material comprises 90% COPP, 8% vinyl-acrylate copolymer and 2% synthetic silica; Middle thickness 15 μm, wherein raw material comprises 90% HOPP, 8% vinyl-acrylate copolymer and 2% ethoxylated amine.Lower thickness 5 μm, wherein raw material comprises 90% COPP, 8% vinyl-acrylate copolymer and 2% synthetic silica.
Masking: adopt biaxial tension co-extrusion technique to obtain Biaxially oriented polypropylene high heat-sealing strength film of the present invention, wherein extruder temperature: 220 DEG C; Slab machine temperature: 20 DEG C; Longitudinal stretching multiplying power: 490%; Indulge and draw preheat temperature: 120 DEG C; Indulge and draw draft temperature: 100 DEG C; Cross directional stretch multiplying power: 850%; Horizontally draw preheat temperature: 175 DEG C; Horizontally draw draft temperature: 160 DEG C; Horizontally draw setting temperature: 150 DEG C; Rolling draw ratio: 100%.
Embodiment 3
Produce thickness 20 μm of films.Batching: upper thickness 3 μm, wherein 85% COPP, 13% vinyl-acrylate copolymer and 2% synthetic silica; Middle thickness 14 μm, wherein 88% HOPP, 10% vinyl-acrylate copolymer and 2% ethoxylated amine.Lower thickness 3 μm, wherein 85% COPP, 13% vinyl-acrylate copolymer and 2% synthetic silica.
Masking: adopt biaxial tension co-extrusion technique to obtain Biaxially oriented polypropylene high heat-sealing strength film of the present invention, wherein extruder temperature: 235 DEG C; Slab machine temperature: 30 DEG C; Longitudinal stretching multiplying power: 510%; Indulge and draw preheat temperature: 125 DEG C; Indulge and draw draft temperature: 110 DEG C; Cross directional stretch multiplying power: 930%; Horizontally draw preheat temperature: 180 DEG C; Horizontally draw draft temperature: 165 DEG C; Horizontally draw setting temperature: 150 DEG C; Rolling draw ratio: 100%.
Claims (4)
1. a Biaxially oriented polypropylene height heat-sealing film, its structure is divided into upper, middle and lower-ranking structure, it is characterized in that, upper strata is mixed with by the raw material of following weight percent: 83 ~ 94% COPPs, 5 ~ 15% vinyl-acrylate copolymers and 1 ~ 2% synthetic silica; Intermediate layer is mixed with by the raw material of following weight percent: 82 ~ 94% HOPPs, 5 ~ 15% vinyl-acrylate copolymers and 1 ~ 3% ethoxylated amine; Lower floor is mixed with by the raw material of following weight percent: 83 ~ 94% COPPs, 5 ~ 15% vinyl-acrylate copolymers and 1 ~ 2% synthetic silica.
2. Biaxially oriented polypropylene height heat-sealing film according to claim 1, is characterized in that, the gross thickness of described Biaxially oriented polypropylene height heat-sealing film is 18 ~ 36 μm, wherein, upper thickness is 2 ~ 5 μm, and intermediate layer thickness is 14 ~ 26 μm, and lower thickness is 2 ~ 5 μm.
3. the preparation method of Biaxially oriented polypropylene height heat-sealing film according to claim 1, by preparing burden, extruding, slab, longitudinal stretching, cross directional stretch, rolling prepare, and it is characterized in that, the stretching ratio of described longitudinal stretching operation is 485 ~ 530%; The stretching ratio of described cross directional stretch operation is 800 ~ 1000%.
4. the preparation method of Biaxially oriented polypropylene height heat-sealing film according to claim 3, is characterized in that, described in the extruder temperature extruded in operation be 190 ~ 240 DEG C; Slab machine chilling temperature in described slab operation is 18 ~ 32 DEG C; Preheat temperature in described longitudinal stretching operation is 102 ~ 133 DEG C, draft temperature is 80 ~ 113 DEG C; Preheat temperature in described cross directional stretch operation is 150 ~ 185 DEG C, draft temperature is 140 ~ 170 DEG C, setting temperature is 135 ~ 165 DEG C.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210570487.8A CN103009751B (en) | 2012-12-25 | 2012-12-25 | Biaxial stretching polypropylene high heat-seal film and manufacturing method thereof |
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| CN201210570487.8A CN103009751B (en) | 2012-12-25 | 2012-12-25 | Biaxial stretching polypropylene high heat-seal film and manufacturing method thereof |
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| CN103009751B true CN103009751B (en) | 2015-04-22 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104309237B (en) * | 2014-10-22 | 2017-03-01 | 海南赛诺实业有限公司 | A kind of high heat-sealing strength biaxially oriented polypropylene film and its manufacture method |
| CN114013076B (en) * | 2021-11-03 | 2023-02-03 | 海南赛诺实业有限公司 | Preparation method of biaxially oriented polypropylene polyvinyl alcohol coating film with high heat seal strength |
| CN113927983B (en) * | 2021-11-03 | 2023-03-17 | 海南赛诺实业有限公司 | Single-side high-heat-seal biaxially oriented polypropylene substrate and preparation method thereof, polypropylene aluminized film and preparation method thereof |
| CN113910729B (en) * | 2021-11-03 | 2023-03-17 | 海南赛诺实业有限公司 | High-heat-seal-strength biaxially oriented polypropylene high-barrier coating film and preparation method thereof |
| CN116001397B (en) * | 2022-12-28 | 2023-09-22 | 浙江凯利新材料股份有限公司 | BOPP heat-seal film with high hot-tack strength and preparation method thereof |
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| CN201143785Y (en) * | 2007-10-18 | 2008-11-05 | 泉州利昌塑胶有限公司 | Multi-layer coextrusion bidirectional stretching polypropylene film having high heat sealing strength |
| CN101332675A (en) * | 2007-06-28 | 2008-12-31 | 维龙（上海）包装工业有限公司 | Manufacture method of heat-sealing biaxial stretching polypropylene film micropore basal membrane capable of increasing tearing toughness |
| CN101428699A (en) * | 2007-12-27 | 2009-05-13 | 海南赛诺实业有限公司 | Heat sealing type biaxial-tension polypropylene film |
| CN201338791Y (en) * | 2008-09-28 | 2009-11-04 | 葛敬银 | Flexible packing multi-layer coextrusion heat-sealing film used for getting rid of compositing cementing compound |
| CN101758652A (en) * | 2009-11-10 | 2010-06-30 | 湖北富思特材料科技有限公司 | Biaxial stretched polyethylene heat-sealing film |
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2012
- 2012-12-25 CN CN201210570487.8A patent/CN103009751B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101332675A (en) * | 2007-06-28 | 2008-12-31 | 维龙（上海）包装工业有限公司 | Manufacture method of heat-sealing biaxial stretching polypropylene film micropore basal membrane capable of increasing tearing toughness |
| CN201143785Y (en) * | 2007-10-18 | 2008-11-05 | 泉州利昌塑胶有限公司 | Multi-layer coextrusion bidirectional stretching polypropylene film having high heat sealing strength |
| CN101428699A (en) * | 2007-12-27 | 2009-05-13 | 海南赛诺实业有限公司 | Heat sealing type biaxial-tension polypropylene film |
| CN201338791Y (en) * | 2008-09-28 | 2009-11-04 | 葛敬银 | Flexible packing multi-layer coextrusion heat-sealing film used for getting rid of compositing cementing compound |
| CN101758652A (en) * | 2009-11-10 | 2010-06-30 | 湖北富思特材料科技有限公司 | Biaxial stretched polyethylene heat-sealing film |
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