CN103738015B - A kind of transverse-thermal-sbidirectional bidirectional stretching polyester thin film and preparation method thereof - Google Patents
A kind of transverse-thermal-sbidirectional bidirectional stretching polyester thin film and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a kind of transverse-thermal-sbidirectional bidirectional stretching polyester thin film, described polyester film includes the upper, middle and lower, described middle level covers in lower floor, described upper strata covers on middle level, described upper strata, middle level, lower floor respectively after molten condition is extruded by extruder the common triple extrusion die head that enters be composited described polyester film；The mass fraction of described the upper, middle and lower is: upper strata is 30～40 parts of masterbatch A, and middle level is 20～30 parts of masterbatch B, and lower floor is 30～40 parts of masterbatch C；Production technology of the present invention can with the addition of a certain proportion of reclaimed materials, greatly reduces production cost, has been well adapted for industrialized requirement；Have employed the production technology of interior interpolation, introduce stabilizer and make low cost transverse-thermal-sbidirectional bidirectional stretching polyester thin film have preferable shrinkage in formula, shrinkage factor is up to 30%, longitudinal percent thermal shrinkage 5%.
Description
(1) technical field
The invention belongs to packet industry, relate to a kind of biaxially oriented polyester film and producer thereof
Method, particularly relates to a kind of low cost transverse-thermal-sbidirectional bidirectional stretching polyester thin film and production method thereof.
(2) background technology
The application of low cost transverse-thermal-sbidirectional bidirectional stretching polyester thin film the most extensively, can be applicable to drink
Packaging outside material bottle, the composite print of various food outer bags, it is also widely used in shelf-life longer food
Such as the outer package product such as coffee, milk, anti-false trademark purposes, it it is the polyester film of a kind of high added value
Product.
The low cost transverse-thermal-sbidirectional bidirectional stretching polyester thin film mode of production mainly uses PETG at present
Raw material carries out biaxial tension, improves on the basis of POF membrane process.But this method for
Being dried and require special, and raw material is the highest, and continuity is poor in process of production.And directly use
PET raw material produces, and effect is more obvious, the biaxial tension of the horizontal thermal contraction produced
Polyester film is fit transparent in aft-loaded airfoil, embodies commodity image；Tightly restrainting packing material, anti-scattered property is good；
Without restoration, there is certain antiforge function.Heat shrinkable polyester film be usually used in instant food, beverage market,
Electronic apparatus, metallic article, particularly shrink label are its topmost applications.
(3) summary of the invention
The technical problem to be solved is to provide the biaxial tension of the horizontal thermal contraction of low cost and gathers
The raw material proportioning of ester film and preparation method, both ensured the brightness of film, ensured again thin in production process
The shrinkage of film, prepares stay-in-grade polyester film.
The technical solution used in the present invention is:
The present invention provides a kind of transverse-thermal-sbidirectional bidirectional stretching polyester thin film, and described polyester film includes
The upper, middle and lower, described middle level covers in lower floor, and described upper strata covers on middle level, institute
The upper strata stated, middle level, lower floor respectively after molten condition is extruded by extruder common enter three-layer co-extruded
Die head is composited described polyester film；The mass fraction of described the upper, middle and lower is: on
Layer is 30～40 parts of masterbatch A, and middle level is 20～30 parts of masterbatch B, and lower floor is 30～40 parts of masterbatch C；
Based on described masterbatch A, described masterbatch A quality group becomes: 100 parts of polyester a, 50～80
Part filler a and 1～5 part of stabilizer a, the particle diameter of described filler a is 0.5～3 μm (preferably 1 μm)；
Based on described masterbatch B, described masterbatch B quality group becomes: 100 parts of polyester b and 0.2～
0.4 part of stabilizer b；
Described masterbatch C is identical with masterbatch A mass composition；
Described polyester a is polyethylene terephthalate, polybutylene terephthalate, or both
Copolymer, preferably polyethylene terephthalate (PET), its inherent viscosity (unit: dl/g)
Preferably 0.6～0.70；Described polyester b is identical with polyester a；
Described stabilizer a is four [α-(3,5-di-t-butyl 4-hydroxy phenyl) propionic acid] pentaerythritol ester, institute
State stabilizer b identical with stabilizer a；
Described filler a is one or more arbitrary proportions in zinc oxide, barium sulfate or kaolin
Mixing, preferential oxidation zinc, requirement of both cost and production performance can be met.
Further, described upper strata is 30 parts of masterbatch A, and described middle level is 20 parts of masterbatch B, described under
Layer is 30 parts of masterbatch C.
Further, the most described masterbatch A quality group becomes: 100 parts of polyester a, 60～70 parts of fillers
A and 1～5 part of stabilizer a, the particle diameter of described filler a is 0.5～3 μm；Described filler a is oxidation
Zinc.
Further, described transverse-thermal-sbidirectional bidirectional stretching polyester thin film quality group becomes:
Become based on described masterbatch A quality group: 100 parts of polyester a, 50 parts of filler a and 4 parts are steady
Determining agent a, the particle diameter of described filler a is 1 μm；
Become based on described masterbatch B quality group: 100 parts of polyester b and 0.4 part of stabilizer b；
Described masterbatch C is identical with masterbatch A mass composition；
Described polyester a is polyethylene terephthalate；Described polyester b is identical with polyester a；
Described stabilizer a is four [α-(3,5-di-t-butyl 4-hydroxy phenyl) propionic acid] pentaerythritol ester, institute
State stabilizer b identical with stabilizer a；
Described filler a is zinc oxide.
Additionally, in transverse-thermal-sbidirectional bidirectional stretching polyester thin film of the present invention, described masterbatch B
Substituting polyester b with 15～30 parts of reclaimed materials in (i.e. intermediate layer), described reclaimed materials is preparation laterally heat
The leftover pieces of generation, the most described reclaimed materials quality is cut after the biaxially oriented polyester film finished product shunk
Part is 20～25 parts.
The present invention also provides for a kind of method preparing described transverse-thermal-sbidirectional bidirectional stretching polyester thin film,
Described method is:
(1) raw material preparation: described polyester film includes that the upper, middle and lower, described upper strata are
Mass parts 30～40 parts of masterbatch A, described middle level mass parts is 20～30 parts of masterbatch B, described lower floor matter
Amount part is 30～40 parts of masterbatch C；
Based on described masterbatch A, described masterbatch A quality group becomes: 100 parts of polyester a, 50～80
Part filler a and 1～5 part of stabilizer a, the particle diameter of described filler a is 0.5～3 μm；
Based on described masterbatch B, described masterbatch B quality group becomes: 100 parts of polyester b and 0.2～
0.4 part of stabilizer b；
Described masterbatch C is identical with masterbatch A mass composition；
(2) polyester film: masterbatch A and masterbatch C is each sent into double screw extruder, extrusion temperature
Degree is 255～285 DEG C, is dried 2～3 hours at 180～190 DEG C through turnover plate type drying tower by masterbatch B
Rear feeding single screw extrusion machine, extrusion temperature is 255～285 DEG C, and three extruders are through molten condition
Enter triple extrusion die head by the order of the upper, middle and lower from top to bottom after extrusion to be combined, melt
Uniformly extruding through die lip mouth, extrusion temperature is 255～285 DEG C, is then passed through slab, stretches, calmly
Type, rolling and cut, obtain transverse-thermal-sbidirectional bidirectional stretching polyester thin film；Drawing zone temperature
65～110 DEG C, setting temperature 65～150 DEG C.
Stabilizer a of the present invention, stabilizer b are stabilizer, for ease of distinguishing different step institute
Consumption is different and names, and described polyester a, polyester b are the different types of poly-of different step use
Ester, names, described masterbatch A, masterbatch B and mother for ease of distinguishing each step usage amount difference
Material C is the masterbatch of different composition, and letter itself does not has implication.
Compared with prior art, the beneficial effects are mainly as follows:
(1) production technology can with the addition of a certain proportion of reclaimed materials, greatly reduces production cost,
It is well adapted for industrialized requirement.
(2) have employed the production technology of interior interpolation, formula introduces stabilizer and makes low cost horizontal
The biaxially oriented polyester film of thermal contraction has preferable shrinkage, and horizontal shrinkage factor is up to 30%,
Longitudinal thermal contraction is 5%.
(4) detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described further, but protection scope of the present invention
It is not limited to that:
Embodiment 1:
(1) raw material preparation
Upper strata (masterbatch A): (degree of polymerization is 100 to 100 parts of polyethylene terephthalates, molecule
Amount is 30,000, purchased from Yizheng Fiber Optical plant company of China), 50 parts of zinc oxide (particle diameter is 1 μm) and 4 parts
Four [α-(3,5-di-t-butyl 4-hydroxy phenyl) propionic acid] pentaerythritol ester.
Lower floor (masterbatch C): (degree of polymerization is 100 to 100 parts of polyethylene terephthalates, molecule
Amount is 30,000, purchased from Yizheng Fiber Optical plant company of China), 50 parts of zinc oxide (particle diameter is 1 μm) and 4 parts
Four [α-(3,5-di-t-butyl 4-hydroxy phenyl) propionic acid] pentaerythritol ester.
Middle level (masterbatch B): (degree of polymerization is 100 to 100 parts of polyethylene terephthalates, molecule
Amount is 30,000, purchased from Yizheng Fiber Optical plant company of China) and 0.4 part of four [α-(3,5-di-t-butyl 4-hydroxy benzenes
Base) propionic acid] pentaerythritol ester.
(2) polyester film
Respectively 30 parts of masterbatch A and 30 parts of masterbatch C are sent into two double spiral shells by step (1) formula ratio
(model ZE60A-34D-UTX, producer is the Kraussmaffei Berstorff of Germany to bar extruder
Company), it is thoroughly mixed, extrusion temperature is 275 DEG C, then by 20 parts of masterbatch B through turnover panel
It is little that formula drying tower (model DHP-3500, producer is Beijing moral bark of official magnolia company) is dried 3 at 150 DEG C
Single screw extrusion machine (model BS-PETP275/30D, Germany of producer BBEngineering is sent into time after
Company), extrusion temperature is 275 DEG C, and three extruders are pressed upper after molten condition is extruded from top to bottom
The order of layer, middle level and lower floor enters triple extrusion die head, and melt is uniformly extruded through die lip mouth, extrusion
Temperature is 275 DEG C, be then passed through slab, stretch, shape, rolling and cutting, obtain laterally heat and receive
The biaxial tension pet film of contracting；Drawing zone temperature 110 DEG C, setting temperature
110 DEG C, at 150 DEG C of environment of baking oven (model ed53#04-59955, producer is Bin get company of Germany)
Under record the horizontal percent thermal shrinkage 20% of film that thickness is 30 μm, longitudinal percent thermal shrinkage 5%.
Embodiment 2:
(1) raw material preparation
Upper strata (masterbatch A): (degree of polymerization is 100 to 100 parts of polyethylene terephthalates, molecule
Amount is 30,000, purchased from Yizheng Fiber Optical plant company of China), 70 parts of zinc oxide (particle diameter is 1 μm) and 4 parts
Four [α-(3,5-di-t-butyl 4-hydroxy phenyl) propionic acid] pentaerythritol ester.
Lower floor (masterbatch C): (degree of polymerization is 100 to 100 parts of polyethylene terephthalates, molecule
Amount is 30,000, purchased from Yizheng Fiber Optical plant company of China), 70 parts of zinc oxide (particle diameter is 1 μm) and 4 parts
Four [α-(3,5-di-t-butyl 4-hydroxy phenyl) propionic acid] pentaerythritol ester.
Middle level (masterbatch B): (degree of polymerization is 100 to 100 parts of polyethylene terephthalates, molecule
Amount is 30,000, purchased from Yizheng Fiber Optical plant company of China) and 0.4 part of four [α-(3,5-di-t-butyl 4-hydroxy benzenes
Base) propionic acid] pentaerythritol ester.
(2) pet film
Respectively 35 parts of masterbatch A and 35 parts of masterbatch C are sent into two double spiral shells by step (1) formula ratio
(model ZE60A-34D-UTX, producer is the Kraussmaffei Berstorff of Germany to bar extruder
Company), be thoroughly mixed, extrusion temperature be 275 DEG C then by 25 parts of masterbatch B through turnover plate type
Drying tower (model DHP-3500, producer is Beijing moral bark of official magnolia company) is dried 3 hours at 150 DEG C
Rear feeding single screw extrusion machine (model BS-PETP 275/30D, Germany of producer BBEngineering
Company), extrusion temperature is 275 DEG C, and three extruders are pressed upper after molten condition is extruded from top to bottom
The order of layer, middle level and lower floor enters triple extrusion die head, and melt is uniformly extruded through die lip mouth, extrusion
Temperature is 275 DEG C, be then passed through slab, stretch, shape, rolling and cutting, obtain laterally heat and receive
The biaxial tension pet film of contracting；Drawing zone temperature 100 DEG C, setting temperature
100 DEG C, at 150 DEG C of environment of baking oven (model ed53#04-59955, producer is Bin get company of Germany)
Under record the horizontal percent thermal shrinkage 25% of film that thickness is 25 μm, longitudinal percent thermal shrinkage 5%.
Embodiment 3:
(1) raw material preparation
Upper strata (masterbatch A): (degree of polymerization is 100 to 100 parts of polyethylene terephthalates, molecule
Amount is 30,000, purchased from Yizheng Fiber Optical plant company of China), 70 parts of zinc oxide (particle diameter is 1 μm) and 4 parts
Four [α-(3,5-di-t-butyl 4-hydroxy phenyl) propionic acid] pentaerythritol ester.
Lower floor (masterbatch C): 100 parts of polyethylene terephthalates, 70 parts of zinc oxide (particle diameters
It is 1 μm) and 4 part of four [α-(3,5-di-t-butyl 4-hydroxy phenyl) propionic acid] pentaerythritol ester.
Middle level (masterbatch B): (degree of polymerization is 100 to 100 parts of polyethylene terephthalates, molecule
Amount is 30,000, purchased from Yizheng Fiber Optical plant company of China) and 0.4 part of four [α-(3,5-di-t-butyl 4-hydroxy benzenes
Base) propionic acid] pentaerythritol ester.
(2) polyester film
Respectively 40 parts of masterbatch A and 40 parts of masterbatch C are sent into two double spiral shells by step (1) formula ratio
(model ZE60A-34D-UTX, producer is the Kraussmaffei Berstorff of Germany to bar extruder
Company), be thoroughly mixed, extrusion temperature be 275 DEG C then by 30 parts of masterbatch B through turnover plate type
It is little that drying tower (model DHP-3500, producer is Beijing moral bark of official magnolia company) is dried 2.5 at 150 DEG C
Single screw extrusion machine (model BS-PETP 275/30D, Germany of producer BBEngineering is sent into time after
Company), extrusion temperature is 275 DEG C, and three extruders are pressed upper after molten condition is extruded from top to bottom
The order of layer, middle level and lower floor enters triple extrusion die head, and melt is uniformly extruded through die lip mouth, extrusion
Temperature is 275 DEG C, be then passed through slab, stretch, shape, rolling and cutting, obtain laterally heat and receive
The biaxial tension pet film of contracting；Drawing zone temperature 100 DEG C, setting temperature
80 DEG C, at 150 DEG C of environment of baking oven (model ed53#04-59955, producer is Bin get company of Germany)
Under record the horizontal percent thermal shrinkage 30% of film that thickness is 20 μm, longitudinal percent thermal shrinkage 5%.
Embodiment 4:
(1) raw material preparation
Upper strata (masterbatch A): (degree of polymerization is 100 to 100 parts of polyethylene terephthalates, molecule
Amount is 30,000, purchased from Yizheng Fiber Optical plant company of China), 70 parts of zinc oxide (particle diameter is 1 μm) and 4 parts
Four [α-(3,5-di-t-butyl 4-hydroxy phenyl) propionic acid] pentaerythritol ester.
Lower floor (masterbatch C): 100 parts of polyethylene terephthalates, 70 parts of zinc oxide (particle diameters
It is 1 μm) and 4 part of four [α-(3,5-di-t-butyl 4-hydroxy phenyl) propionic acid] pentaerythritol ester.
Middle level (masterbatch B): (degree of polymerization is 100 to 80 parts of polyethylene terephthalates, molecule
Amount is 30,000, purchased from Yizheng Fiber Optical plant company of China) and 0.4 part of four [α-(3,5-di-t-butyl 4-hydroxy benzenes
Base) propionic acid] pentaerythritol ester, the biaxial stretching polyester that the embodiment 1 of 20 parts prepares horizontal thermal contraction is thin
The leftover pieces of generation are cut after film finished product.
(2) polyester film
Respectively 40 parts of masterbatch A and 40 parts of masterbatch C are sent into two double spiral shells by step (1) formula ratio
(model ZE60A-34D-UTX, producer is the Kraussmaffei Berstorff of Germany to bar extruder
Company), be thoroughly mixed, extrusion temperature be 275 DEG C then by 30 parts of masterbatch B through turnover plate type
It is little that drying tower (model DHP-3500, producer is Beijing moral bark of official magnolia company) is dried 2.5 at 150 DEG C
Single screw extrusion machine (model BS-PETP 275/30D, Germany of producer BBEngineering is sent into time after
Company), extrusion temperature is 275 DEG C, and three extruders are pressed upper after molten condition is extruded from top to bottom
The order of layer, middle level and lower floor enters triple extrusion die head, and melt is uniformly extruded through die lip mouth, extrusion
Temperature is 275 DEG C, be then passed through slab, stretch, shape, rolling and cutting, obtain laterally heat and receive
The biaxial tension pet film of contracting；Drawing zone temperature 100 DEG C, setting temperature
80 DEG C, at 150 DEG C of environment of baking oven (model ed53#04-59955, producer is Bin get company of Germany)
Under record the horizontal percent thermal shrinkage 30% of film that thickness is 20 μm, longitudinal percent thermal shrinkage 5%, add 20
After the reclaimed materials of part, the main performance of heat shrink films meets the requirements.
Claims (7)
1. a transverse-thermal-sbidirectional bidirectional stretching polyester thin film, it is characterised in that described polyester film includes
The upper, middle and lower, described middle level covers in lower floor, and described upper strata covers on middle level, described
Upper strata, middle level, lower floor after molten condition is extruded by extruder, jointly enter triple extrusion die head respectively
Be composited described polyester film；The mass fraction of described the upper, middle and lower is: upper strata is
30～40 parts of masterbatch A, middle level is 20～30 parts of masterbatch B, and lower floor is 30～40 parts of masterbatch C；
Based on described masterbatch A, described masterbatch A quality group becomes: 100 parts of polyester a, 50～80 parts fill out
Material a and 1～5 part of stabilizer a, the particle diameter of described filler a is 0.5～3 μm；
Based on described masterbatch B, described masterbatch B quality group becomes: 100 parts of polyester b and 0.2～0.4
Part stabilizer b；
Described masterbatch C is identical with masterbatch A mass composition；
Described polyester a is polyethylene terephthalate or polybutylene terephthalate；Described polyester
B is identical with polyester a；
Described stabilizer a is four [β-(3,5-di-t-butyl 4-hydroxy phenyl) propionic acid] pentaerythritol ester, described
Stabilizer b is identical with stabilizer a；
Described filler a is one or more arbitrary proportions in zinc oxide, barium sulfate or kaolin
Mixing.
2. transverse-thermal-sbidirectional bidirectional stretching polyester thin film as claimed in claim 1, it is characterised in that described
Upper strata is 30 parts of masterbatch A, and described middle level is 20 parts of masterbatch B, and described lower floor is 30 parts of masterbatch C.
3. transverse-thermal-sbidirectional bidirectional stretching polyester thin film as claimed in claim 1, it is characterised in that described
Masterbatch A quality group becomes: 100 parts of polyester a, 60～70 parts of filler a and 1～5 part of stabilizer a, described
The particle diameter of filler a is 0.5～3 μm；Described filler a is zinc oxide.
4. transverse-thermal-sbidirectional bidirectional stretching polyester thin film as claimed in claim 1, it is characterised in that:
Become based on described masterbatch A quality group: 100 parts of polyester a, 50 parts of filler a and 4 parts are stable
Agent a, the particle diameter of described filler a is 1 μm；
Become based on described masterbatch B quality group: 100 parts of polyester b and 0.4 part of stabilizer b；
Described masterbatch C is identical with masterbatch A mass composition；
Described polyester a is polyethylene terephthalate；Described polyester b is identical with polyester a；
Described stabilizer a is four [β-(3,5-di-t-butyl 4-hydroxy phenyl) propionic acid] pentaerythritol ester, described
Stabilizer b is identical with stabilizer a；
Described filler a is zinc oxide.
5. transverse-thermal-sbidirectional bidirectional stretching polyester thin film as claimed in claim 1, it is characterised in that described
Masterbatch B substitutes polyester b with 15～30 parts of reclaimed materials, described reclaimed materials be prepare horizontal thermal contraction pair
The leftover pieces of generation are cut after oriented polyester film finished product.
6. transverse-thermal-sbidirectional bidirectional stretching polyester thin film as claimed in claim 5, it is characterised in that described
Reclaimed materials mass parts is 20～25 parts.
7. the method preparing transverse-thermal-sbidirectional bidirectional stretching polyester thin film described in claim 1, its
It is characterised by that described method is:
(1) raw material preparation: described polyester film includes that the upper, middle and lower, described upper strata are quality
30～40 parts of masterbatch A of part, described middle level is mass parts 20～30 parts of masterbatch B, and described lower floor is mass parts
30～40 parts of masterbatch C；
Based on described masterbatch A, described masterbatch A quality group becomes: 100 parts of polyester a, 50～80 parts fill out
Material a and 1～5 part of stabilizer a, the particle diameter of described filler a is 0.5～3 μm；
Based on described masterbatch B, described masterbatch B quality group becomes: 100 parts of polyester b and 0.2～0.4
Part stabilizer b；
Described masterbatch C is identical with masterbatch A mass composition；
(2) polyester film: masterbatch A and masterbatch C is each sent into double screw extruder, extrusion temperature
It is 255～285 DEG C, masterbatch B is sent after turnover plate type drying tower is dried 2～3 hours at 180～190 DEG C
Entering single screw extrusion machine, extrusion temperature is 255～285 DEG C, three extruders after molten condition is extruded from
Top to bottm entering triple extrusion die head by the order of the upper, middle and lower to be combined, melt is equal through die lip mouth
Even extrusion, extrusion temperature is 255～285 DEG C, be then passed through slab, stretch, shape, rolling and cutting,
Obtain transverse-thermal-sbidirectional bidirectional stretching polyester thin film；Drawing zone temperature 65～110 DEG C, setting temperature
65～150 DEG C.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104890332B (en) * | 2015-05-30 | 2017-03-22 | 汕头市金品塑胶实业有限公司 | High-barrier coated sheet and production method thereof |
| CN105504253B (en) * | 2016-01-22 | 2017-09-12 | 四川东材绝缘技术有限公司 | A kind of silicone polyester copolymer resin, silicone polyester copolymer compound substrate membranes and preparation method thereof |
| CN106827568A (en) * | 2017-02-08 | 2017-06-13 | 营口康辉石化有限公司 | A kind of polyester film production technology of use reclaimed materials |
| CN111421779A (en) * | 2020-03-31 | 2020-07-17 | 南京兰埔成新材料有限公司 | Preparation method of high-thermal-shrinkage BOPET film |
| CN111823679A (en) * | 2020-06-09 | 2020-10-27 | 山东圣和塑胶发展有限公司 | Light-blocking shrink film and preparation method thereof |
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| CN101381508A (en) * | 2008-10-27 | 2009-03-11 | 南京金中达新材料有限公司 | White biaxial stretching polyester film and production method thereof |
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| CN202727490U (en) * | 2012-08-28 | 2013-02-13 | 山东圣和塑胶发展有限公司 | Thermal shrinkage polyester film |
| CN103226213A (en) * | 2013-05-02 | 2013-07-31 | 江苏裕兴薄膜科技股份有限公司 | Polyester reflective film containing polymer microsphere, and preparation method of polyester reflective film |
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| CN101381508A (en) * | 2008-10-27 | 2009-03-11 | 南京金中达新材料有限公司 | White biaxial stretching polyester film and production method thereof |
| CN101623947A (en) * | 2009-08-06 | 2010-01-13 | 浙江大东南包装股份有限公司 | Ultra-thin BOPET film and manufacturing method thereof |
| CN202727490U (en) * | 2012-08-28 | 2013-02-13 | 山东圣和塑胶发展有限公司 | Thermal shrinkage polyester film |
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