CN103223758B - A kind of architectural engineering BOPET film and preparation method thereof - Google Patents
A kind of architectural engineering BOPET film and preparation method thereof Download PDFInfo
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- CN103223758B CN103223758B CN201310132337.3A CN201310132337A CN103223758B CN 103223758 B CN103223758 B CN 103223758B CN 201310132337 A CN201310132337 A CN 201310132337A CN 103223758 B CN103223758 B CN 103223758B
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Abstract
The invention discloses a kind of architectural engineering BOPET film and preparation method thereof, the asynchronous biaxially oriented polyester film that this kind of thin film is is main component with polyester, it is made up of upper epidermis, sandwich layer and layer, the component of its center core layer is polyester slice, and the component on upper and lower top layer is constituted by modified PET masterbatch or PETG masterbatch；Film heat seal strengths >=3.0N/15mm, heat-sealing temperature scope 85 DEG C～140 DEG C.The basement membrane of the present invention has heat seal strength height, the unpacking features such as temperature is low, it is mainly used in the female bag basement membrane of architectural engineering anchoring, it seals excellent effect, heat seal strength is big, the protection composite bag mechanical strength made is big, there is good breach easy-to-rupture simultaneously, it is simple to protection composite bag is torn when needed and made coagulator and concrete mixing.
Description
Technical field
The present invention relates to a kind of architectural engineering BOPET film and preparation method thereof, more specifically a kind of a kind of thin film for manufacturing architectural engineering holdfast protection composite bag, has the features such as temperature is low, heat seal strength is big, heat sealable temperature range wide, dimensionally stable of breaking seal.
Background technology
Mylar is widely used in leisure parcel packaging for foodstuff, and this kind of parcel baling line can fast sealing, it is accordingly required in particular to the thin film that can directly seal, and so can improve production efficiency, reduce cost.But common heat sealable type BOPET film usually occurs that when application heat seal strength is inadequate, unpacking temperature is too high, and general heat-sealing type BOPET film is all one side heat-sealing, and producer needs first gluing compound reheating to seal bag after buying, operation is loaded down with trivial details.Especially the architectural engineering making of holdfast protection composite bag, it is necessary to the requirements such as heat seal strength is big, size temperature, the envelope temperature also tried one's best on this basis is low, in order to large-scale production.
Summary of the invention
For above-mentioned the deficiencies in the prior art, it is an object of the invention to provide a kind of architectural engineering BOPET film and preparation method thereof, it can overcome, and existing PET heat-sealing film heat-sealing temperature is high, heat seal strength is low, additionally also has two-sided heat-sealing, dimensionally stable, easily the premium properties such as tears.
The present invention realizes the technical scheme that its purpose takes to be: a kind of architectural engineering BOPET film, it is made up of upper epidermis, sandwich layer and layer, its center core layer consist of polyester slice, the composition on upper and lower top layer is 20-30wt% polyester masterbatch and 70-80wt% polyester slice.
Described polyester masterbatch is through SiO2The PET master batch that microgranule, polymethyl methacrylate microgranule or crosslinked polystyrene beads are modified.
Described polyester masterbatch intrinsic viscosity is 0.70 ± 0.01dL/g.
In described polyester masterbatch, SiO2The concentration of microgranule, polymethyl methacrylate microgranule or crosslinked polystyrene beads is 1000ppm ~ 3000ppm.
The method of architectural engineering BOPET film of the present invention, following steps carry out:
A), polyester slice dries 4～5 hours with the temperature of 140～160 DEG C through fluid bed and must dry raw material；Described dry raw material is heated into molten condition in melt extruder, enters metering extruder after filtering, obtains sandwich layer melt；In two auxiliary double screw extruders by polyester masterbatch and polyester slice after melted, evacuation process, the moisture content being filtered to remove in raw material obtains the auxiliary crowded melt respectively as upper epidermis and layer with impurity；Sandwich layer melt and auxiliary crowded melt converge extrusion blend melt in three layers die head, and converging extrusion temperature is 270～290 DEG C；
B), for the blend melt of extrusion in described step a), it is cooled into slab through one side, then slab is cooled to 35～45 DEG C；
C), by slab carrying out longitudinal stretching is sheet, and preheating section temperature is 65～110 DEG C, and stretch section temperature is 100～115 DEG C, is aided with Infrared Heating, setting temperature is 25～40 DEG C；
D), by sheet carrying out cross directional stretch is thin film, and preheating section temperature is 90～110 DEG C, and stretch section temperature is 100～120 DEG C, and setting temperature is 180～250 DEG C, and cooling section temperature is 80～130 DEG C
E), by the gained packaging film feeding machine in step d), harvest parent roll after deburring, cooling, flattening；
F), parent roll qualified after testing after call in cutting machine by driving and carry out cutting, batch, make finished product.
Thin film described in step e) flattens through carry-over pinch rolls cooling and carries out sided corona treatment.
As prioritization scheme: little disintegrating machine will be entered from step e deburring rim charge and crush; it is re-fed in comminutor and makes pellet; material grain enters metering extruder through processes such as crystallizing and dryings after converging together with polyester slice again, and essence can as sandwich layer melt after filtering.
As prioritization scheme: described sandwich layer melt aggregated particle is less than 15 μm.
As prioritization scheme: thin film described in step e flattens through carry-over pinch rolls cooling and carries out sided corona treatment.
As shown from the above technical solution: upper layer is used modified PET or PETG masterbatch by the present invention, have the functional film of two-sided heat-sealing through technique adjustment output, it has had the features such as envelope temperature heat-sealing scope low, effective wide, heat seal strength big, dimensionally stable.Film heat seal strengths >=3.0N/15mm, heat-sealing temperature scope 85 DEG C～140 DEG C, and there is the advantages such as two-sided heat-sealing.
Detailed description of the invention
Common PET belongs to crystalline polymer, after the stretched orientation of PET film, can produce crystallization largely, as it is sealed, can produce contraction distortion, therefore common PET film does not possess heat sealability.
In order to solve heat-sealing problem, the present invention is by being modified PET resin, and adopts the die head of A/B/C three-decker, develops three-layer co-extruded heat-sealing type BOPET film, and this heat-sealing type BOPET film is all heat sealable due to two sides, uses very convenient.It is below embodiments of the invention:
Embodiment 1
Upper epidermis by weight percentage, wherein, containing antiblocking agent SiO2The polyester masterbatch of microgranule is 20%wt, and remainder is polyester slice PET；In layer, containing antiblocking agent SiO2The polyester masterbatch of microgranule is 20%wt, remaining for polyester PET section；Sandwich layer is 100% polyester slice.SiO2Modified PET polyester masterbatch intrinsic viscosity is 0.7 ± 0.01dL/g, colourity b value is-3 ~ ± 1, wherein SiO2Microgranule valid density is 2000ppm.
This thin film carries out as follows:
A, polyester slice dry 4～5 hours with the temperature of 140～160 DEG C through fluid bed must dry raw material；Described dry raw material is heated into molten condition in melt extruder, enters metering extruder after filtering, obtains bubble-free, without the high-quality melt more than 15 μm of aggregated particles, as sandwich layer melt after essence filtration；Or the material grain that will machine from step e deburring rim charge, after mixing with polyester slice, crystallizing and drying enters metering extruder, obtains bubble-free, without the high-quality melt more than 15 μm of aggregated particles, as sandwich layer melt after essence filtration.
In two auxiliary double screw extruders by polyester masterbatch and polyester slice after melted, evacuation process, the moisture content being filtered to remove in raw material obtains the auxiliary crowded melt respectively as upper epidermis and layer with impurity；Sandwich layer melt and auxiliary crowded melt converge extrusion in three layers die head, and converging extrusion temperature is 270～290 DEG C；
B, in described step a extrusion blend melt, through supercool roller cool down, electrostatic attach formed slab, slab is cooled to 35～45 DEG C；
C, slab carries out longitudinal stretching is sheet, and preheating section temperature is 65～110 DEG C, and stretch section temperature is 100～115 DEG C, is aided with Infrared Heating, and setting temperature is 25～40 DEG C；
D, sheet carries out cross directional stretch is thin film, and preheating section temperature is 90～110 DEG C, and stretch section temperature is 100～120 DEG C, and setting temperature is 180～250 DEG C, and cooling section temperature is 80～130 DEG C
E, by the gained packaging film feeding machine in step d, harvest parent roll after deburring, cooling, flattening；
Call in cutting machine by driving after f, parent roll are qualified after testing to carry out cutting, batch, make finished product.
Embodiment 2
Upper epidermis by weight percentage, wherein: containing antiblocking agent SiO2The polyester masterbatch of microgranule is 30%wt, and remainder is polyester slice PET；In layer, the polyester masterbatch containing antiblocking agent crosslinked polystyrene beads is 30%wt, remaining for polyester PET section；Sandwich layer is 100% polyester slice.Modified PET polyester masterbatch intrinsic viscosity is 0.7 ± 0.01dL/g, colourity b value is-3 ~ ± 1, wherein SiO2Microgranule valid density is 3000ppm.
Production method is same with embodiment 1.
Embodiment 3
Upper epidermis by weight percentage, wherein: containing antiblocking agent SiO2The polyester masterbatch of microgranule is 25%wt, and remainder is polyester slice PET；In layer, the polyester masterbatch containing antiblocking agent polymethyl methacrylate microgranule is 25%wt, remaining for polyester PET section；Sandwich layer is 100% polyester slice.Modified PET polyester masterbatch intrinsic viscosity is 0.7 ± 0.01dL/g, colourity b value is-3 ~ ± 1, wherein SiO2Microgranule valid density is 200ppm.
Production method is same with embodiment 1.
The embodiment above, is only presently preferred embodiments of the present invention, and the present invention not does any type of restriction.Any simple modification, equivalent variations and the modification that above example is made by every technology according to the present invention and method essence, all still falls within the technology of the present invention and the scope of method scheme.
Claims (2)
1. the method making architectural engineering BOPET film, it is characterised in that carry out as follows:
A), polyester slice dries 4～5 hours with the temperature of 140～160 DEG C through fluid bed and must dry raw material；Described dry raw material is heated into molten condition in melt extruder, enters metering extruder after filtering, obtains sandwich layer melt；In two auxiliary double screw extruders by polyester masterbatch and polyester slice after melted, evacuation process, the moisture content being filtered to remove in raw material obtains the auxiliary crowded melt respectively as upper epidermis and layer with impurity；Sandwich layer melt and auxiliary crowded melt converge extrusion blend melt in three layers die head, and converging extrusion temperature is 270～290 DEG C；
B), for the blend melt of extrusion in described step a), it is cooled into slab through one side, then slab is cooled to 35～45 DEG C；
C), by slab carrying out longitudinal stretching is sheet, and preheating section temperature is 65～110 DEG C, and stretch section temperature is 100～115 DEG C, is aided with Infrared Heating, and setting temperature is 25～40 DEG C；
D), by sheet carrying out cross directional stretch is thin film, and preheating section temperature is 90～110 DEG C, and stretch section temperature is 100～120 DEG C, and setting temperature is 180～250 DEG C, and cooling section temperature is 80～130 DEG C
E), by the thin film of gained in step d) by traction machine, harvest parent roll after deburring, cooling, flattening；
F), parent roll qualified after testing after call in cutting machine by driving and carry out cutting, batch, make finished product；This finished architectural engineering BOPET film, is made up of upper epidermis, sandwich layer and layer, its center core layer consist of polyester slice, the composition on upper and lower top layer is 20-30wt% polyester masterbatch and 70-80wt% polyester slice；Described polyester masterbatch is through SiO2The PET master batch that microgranule, polymethyl methacrylate microgranule or crosslinked polystyrene beads are modified；In described polyester masterbatch, SiO2The concentration of microgranule, polymethyl methacrylate microgranule or crosslinked polystyrene beads is 1000ppm ~ 3000ppm；Described polyester masterbatch intrinsic viscosity is 0.70 ± 0.01dL/g.
2. the method for making architectural engineering BOPET film according to claim 1, it is characterised in that: thin film described in step e) flattens through carry-over pinch rolls cooling and carries out sided corona treatment.
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| CN201310132337.3A CN103223758B (en) | 2013-04-17 | 2013-04-17 | A kind of architectural engineering BOPET film and preparation method thereof |
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| CN201310132337.3A CN103223758B (en) | 2013-04-17 | 2013-04-17 | A kind of architectural engineering BOPET film and preparation method thereof |
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| CN103223758B true CN103223758B (en) | 2016-07-20 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109251485B (en) * | 2018-07-05 | 2020-09-18 | 安徽国风塑业股份有限公司 | BOPET film for metal compounding and preparation method thereof |
| CN110696454A (en) * | 2019-03-08 | 2020-01-17 | 河南银金达新材料股份有限公司 | High-elongation polyester modified alloy film for waterproof coiled material and preparation method thereof |
| CN110696504A (en) * | 2019-10-09 | 2020-01-17 | 安徽国风塑业股份有限公司 | TTR (thermal transfer ribbon) biaxially oriented polyester base film for color printing and preparation method thereof |
| CN114274637B (en) * | 2021-12-22 | 2023-06-13 | 江苏裕兴薄膜科技股份有限公司 | Wear-resistant and tear-resistant BOPET film for manufacturing plastic heald wires and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101293413A (en) * | 2008-05-29 | 2008-10-29 | 常州钟恒新材料有限公司 | High-strength reduction polyester film and production method thereof |
| CN101362539A (en) * | 2008-08-30 | 2009-02-11 | 富维薄膜（山东）有限公司 | Polyester film for shrinkable cigarette pack |
| CN101531079A (en) * | 2009-03-10 | 2009-09-16 | 安徽国风塑业股份有限公司 | Polyester thermal contraction film with balanced thermal contraction performance and production method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1727180A (en) * | 2005-07-26 | 2006-02-01 | 中国乐凯胶片集团公司 | Biaxial oriented polymer film capable of thermal sealing and preparation method |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101293413A (en) * | 2008-05-29 | 2008-10-29 | 常州钟恒新材料有限公司 | High-strength reduction polyester film and production method thereof |
| CN101362539A (en) * | 2008-08-30 | 2009-02-11 | 富维薄膜（山东）有限公司 | Polyester film for shrinkable cigarette pack |
| CN101531079A (en) * | 2009-03-10 | 2009-09-16 | 安徽国风塑业股份有限公司 | Polyester thermal contraction film with balanced thermal contraction performance and production method thereof |
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Address after: 230088 No.1000, Mingchuan Road, high tech Zone, Hefei City, Anhui Province Patentee after: Anhui Guofeng New Material Co.,Ltd. Address before: Tianzhi Road, national high tech Industrial Development Zone, Hefei City, Anhui Province, No. 36 230088 Patentee before: ANHUI GUOFENG PLASTIC CO.,LTD. |
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