CN101531079A - Polyester thermal contraction film with balanced thermal contraction performance and production method thereof - Google Patents

Polyester thermal contraction film with balanced thermal contraction performance and production method thereof Download PDF

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Publication number
CN101531079A
CN101531079A CN200910116320A CN200910116320A CN101531079A CN 101531079 A CN101531079 A CN 101531079A CN 200910116320 A CN200910116320 A CN 200910116320A CN 200910116320 A CN200910116320 A CN 200910116320A CN 101531079 A CN101531079 A CN 101531079A
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China
Prior art keywords
thermal contraction
film
polyester
balanced
melt
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Granted
Application number
CN200910116320A
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Chinese (zh)
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CN101531079B (en
Inventor
陈铸红
汪中祥
孙善卫
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Anhui Guofeng New Material Co.,Ltd.
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Anhui Guofeng Plastic Industry Co Ltd
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Priority to CN2009101163202A priority Critical patent/CN101531079B/en
Publication of CN101531079A publication Critical patent/CN101531079A/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels
    • B29C48/08—Flat, e.g. panels flexible, e.g. films
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/92—Measuring, controlling or regulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92704—Temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/92857—Extrusion unit
    • B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
    • B29C2948/92895—Barrel or housing

Abstract

The invention discloses a polyester thermal contraction film with balanced thermal contraction performance and production method thereof, the film is of three-layer construction: a top layer, a core layer and a bottom layer, wherein the component of the core layer is polyethylene terephthalate; the top layer and the bottom layer comprise parent material 15-25% wt and copolymerized modified polyester. The vertical, horizontal thermal contractions of the film are balanced and the vertical thermal contraction is about 65% and the horizontal thermal contraction is about 70% at 90-100DEG C; the vertical, horizontal tensile strengths are 240-260MPa. The process is mature with very strong operability, especially suitable for two-step tensile polyester film production line.

Description

A kind of polyester thermal contraction film and preparation method thereof with balanced thermal contraction performance
Technical field
The present invention relates to a kind of heat shrink films and preparation method thereof, more particularly relate to a kind of Polyester heat shrinkable film and preparation method thereof with balanced thermal contraction performance
Background technology
The requirement of heat shrinkable plastic film is stable at normal temperatures, and (more than the vitrification point, melt temperature is following) shrinks during heating, and thermal contractive label is the main application fields of heat shrinkable plastic film.
Heat shrinkable plastic film begins to be applied in the external packing of general merchandise except as the shrink label this year, and particularly the packing of outward appearance opposite sex article because it both can protect connection with wrapping of piece, can make article win the user with the outward appearance that is beautifully printed again.Heat shrinkable plastic film is used on the pallet integrated packaging in recent years on the other hand, and well girding articles need not the strap adhesive tape.
Heat shrinkable plastic film generally is to make with amorphous plastics processing, for example polystyrene, PVC, PVDC etc.Polystyrene (PS) heat shrink films intensity is low, not shock-resistant, seldom use, and PVC is unfavorable for that recovery does not meet environmental requirement.Forbidden in the particularly use aspect the packaging for foodstuff of packaging field at American-European PVC plastic sheeting.
PETG (PET) heat-shrinkable film then is a kind of novel heat shrinkable package material, it have easy recovery, nontoxic, tasteless, mechanical strength is big, becomes the ideal substitute that replaces the PVC heat-shrinkable film at the PET of developed country.
But present PET heat shrink films mainly is to be applied to thermal contractive label, only laterally stretching so only laterally carrying out thermal contraction (general lateral shrinkage 70%, vertical shrinkage factor 5%), development along with the heat shrinkable package and the antirust heat shrinkable package of metallic article of special-shaped product, require the balanced contraction of film, the pattern that is printed on so in advance on the film can not twist too severity equal proportion contraction basically after contraction.The PET heat-shrinkable film applies to pallet packing on the other hand, require the big packing of thermal shrinkage stress, this also requires film can carry out balancedly shrinking that (this pallet heat shrinkable package is faster than traditional packing belt package speed, and cost is low, and can recycle, help environmental protection).
Summary of the invention
At above-mentioned the deficiencies in the prior art, the object of the present invention is to provide a kind of polyester thermal contraction film with balanced thermal contraction performance, make it when 90-100 ℃ of temperature, laterally percent thermal shrinkage and vertically percent thermal shrinkage can relative equilibrium.
Another object of the present invention provides the preparation method of this film.
The technical scheme that the present invention is taked for its purpose of realization is: a kind of polyester thermal contraction film with balanced thermal contraction performance is three-layer structure: top layer, sandwich layer and bottom, described sandwich layer are one-component: PETG; Described top layer and bottom contain masterbatch: 15-25%wt by weight percentage, and all the other are co-polymerization modified polyester.
Described masterbatch is the mixture of co-polymerization modified polyester and synthetic silica, and synthetic silica is 15-25%wt by weight percentage, and all the other are co-polymerization modified polyester.
Making has the method for the polyester thermal contraction film of balanced thermal contraction performance, carries out as follows:
A, PETG section process fluid bed got dried feed in 4～5 hours with 120～160 ℃ temperature drying; Described dried feed is heated into molten condition in main extruder, obtain after filtration squeezing melt as the master of sandwich layer; In the auxiliary extruder by weight percentage co-polymerization modified polyester section and masterbatch through after fusion, vacuumizing processing, the moisture content that removes by filter in the raw material obtains as the crowded melt of assisting of top layer and bottom with impurity; Main crowded melt converges in three layers of die head with auxilliary crowded melt to be extruded, and converging extrusion temperature is 240～260 ℃;
B, for the blend melt of extruding among the described step a, form the casting sheet through cold roller, obtain the heat shrink films of three-layer structure more successively through longitudinal stretching, cross directional stretch.
In above-mentioned steps b, to the preheating of casting sheet, temperature is 80-90 ℃, carries out longitudinal stretching when being preheated to 85-105 ℃ before vertical the drawing, and indulging and drawing draw ratio is 4.3-4.5; Directly enter horizontal drawing then, the cross directional stretch temperature is 130-140 ℃, and cross directional stretch is than being 4.3-4.4; After vertical, horizontal stretches all without thermal finalization.
Film has one side at least through sided corona treatment.
Compared with the prior art, beneficial effect of the present invention is embodied in: film vertical, horizontal thermal contraction equilibrium, and when 90-100 ℃ of temperature, vertically percent thermal shrinkage about 65%, laterally percent thermal shrinkage about 70%; Vertical and horizontal hot strength is 240～260Mpa.The inventive method is particularly suitable for the polyester film production line of two-step stretch.
The specific embodiment
Below among each embodiment, the co-polymerization modified polyester that is adopted is the product of Changzhou Jin Libao plastic products company, PETG D2H;
Embodiment 1:
Polyester film sandwich layer component: PETG 100%wt;
Top layer and bottom contain masterbatch: 15%wt by weight percentage; All the other are co-polymerization modified polyester PETG.
Masterbatch is the mixture of co-polymerization modified polyester and synthetic silica, and wherein synthetic silica is 15%wt by weight percentage; All the other are co-polymerization modified polyester PETG.
The preparation method of polyester film is carried out as follows:
A, PETG section process fluid bed got dried feed in 4～5 hours with 120～160 ℃ temperature drying; Described dried feed is heated into molten condition in main extruder, obtain after filtration squeezing melt as the master of sandwich layer; In the auxiliary extruder masterbatch equally under 150 ℃ temperature dry 4～5 hours dried feed, co-polymerization modified polyester section and masterbatch are after the process fusion, vacuumizing processing, and the moisture content and the impurity that remove by filter in the raw material obtain squeezing melt as assisting of top layer and bottom; Main crowded melt converges in three layers of die head with auxilliary crowded melt to be extruded, and converging extrusion temperature is 240～260 ℃;
Converge the blend melt of extruding in b, the die head and cast sheet, obtain the heat shrink films of three-layer structure more successively through longitudinal stretching, cross directional stretch through 30 ℃ cold roller formation.To the preheating of casting sheet, temperature is 80-90 ℃, carries out longitudinal stretching when being preheated to 85-105 ℃ before vertical the drawing, and indulging and drawing draw ratio is 4.3-4.5; Directly enter horizontal drawing then, the cross directional stretch temperature is 130-140 ℃, and cross directional stretch is than being 4.3-4.4; After vertical, horizontal stretches all without thermal finalization.Film simultaneously passes through sided corona treatment, and can obtain vertical percent thermal shrinkage is 65%, and laterally percent thermal shrinkage is 70%, and the hot strength of vertical and horizontal is respectively 255MPa and 260MPa, and the miter angle glossiness is 128 boiling hot balanced type heat shrinkable polyester film.Polyester film silicon content 26000ppm.
Embodiment 2:
Polyester film sandwich layer component: PETG 100%wt;
Top layer and bottom contain masterbatch: 25%wt by weight percentage; All the other are co-polymerization modified polyester PETG.
Masterbatch is the mixture of co-polymerization modified polyester and synthetic silica, and wherein synthetic silica is 25%wt by weight percentage; All the other are co-polymerization modified polyester PETG.
This routine preparation method is identical with embodiment 1.
Embodiment 3:
Polyester film sandwich layer component: PETG 100%wt;
Top layer and bottom contain masterbatch: 20%wt by weight percentage; All the other are co-polymerization modified polyester PETG.
Masterbatch is the mixture of co-polymerization modified polyester and synthetic silica, and wherein synthetic silica is 20%wt by weight percentage; All the other are co-polymerization modified polyester PETG.
This routine preparation method is identical with embodiment 1.
Film vertical, horizontal thermal contraction equilibrium in above-mentioned after measured three examples, when 90-100 ℃ of temperature, vertically percent thermal shrinkage about 65%, laterally percent thermal shrinkage about 70%; Vertical and horizontal hot strength is 240～260Mpa.Mature production technology of the present invention has very strong operability, has adapted to the demand of suitability for industrialized production well.Film can directly seal, and need not to be beforehand with into sleeve, can cut scrap (bridge) heat sealing in thermal contraction by the goods size.Gold blocking basal membrane is that downstream client's continuous high-quality production provides powerful guarantee with its excellent performance from the raw material angle.

Claims (5)

1, a kind of polyester thermal contraction film with balanced thermal contraction performance is three-layer structure: top layer, sandwich layer and bottom is characterized in that described sandwich layer is an one-component: PETG; Described top layer and bottom contain masterbatch: 15-25%wt by weight percentage, and all the other are co-polymerization modified polyester.
2, the polyester thermal contraction film with balanced thermal contraction performance according to claim 1 is characterized in that described masterbatch is the mixture of co-polymerization modified polyester and synthetic silica, and synthetic silica is 15-25%wt by weight percentage, and all the other are co-polymerization modified polyester.
3, make the described method of claim 1, it is characterized in that carrying out as follows with polyester thermal contraction film of balanced thermal contraction performance:
A, PETG section process fluid bed got dried feed in 4～5 hours with 120～160 ℃ temperature drying; Described dried feed is heated into molten condition in main extruder, obtain after filtration squeezing melt as the master of sandwich layer; Co-polymerization modified polyester section and masterbatch are after the process fusion, vacuumizing processing in the auxiliary extruder, and the moisture content and the impurity that remove by filter in the raw material obtain squeezing melt as assisting of top layer and bottom; Main crowded melt converges in three layers of die head with auxilliary crowded melt to be extruded, and converging extrusion temperature is 240～260 ℃;
B, for the blend melt of extruding among the described step a, form the casting sheet through cold roller, obtain the heat shrink films of three-layer structure more successively through longitudinal stretching, cross directional stretch.
4, preparation method according to claim 3 is characterized in that: to the preheating of casting sheet, temperature is 80-90 ℃, carries out longitudinal stretching when being preheated to 85-105 ℃ before vertical the drawing, and indulging and drawing draw ratio is 4.3-4.5; Directly enter horizontal drawing then, the cross directional stretch temperature is 130-140 ℃, and cross directional stretch is than being 4.3-4.4; After vertical, horizontal stretches all without thermal finalization.
5, according to claim 3 or 4 described preparation methods, it is characterized in that: film has one side at least through sided corona treatment.
CN2009101163202A 2009-03-10 2009-03-10 Production method of polyester thermal contraction film with balanced thermal contraction performance Active CN101531079B (en)

Priority Applications (1)

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Application Number Priority Date Filing Date Title
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CN101531079B CN101531079B (en) 2011-06-08

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102390194A (en) * 2011-08-21 2012-03-28 安徽国风塑业股份有限公司 Ultrathin TTR (Thermal Transfer Ribbon) polyester film and preparation method thereof
CN102848587A (en) * 2011-06-30 2013-01-02 江苏裕兴薄膜科技股份有限公司 Method for preparing reflective film with light diffusion effect on surface
US20130095371A1 (en) * 2011-10-14 2013-04-18 Avery Dennison Corporation Shrink Film for Label
CN103203934A (en) * 2013-03-26 2013-07-17 江苏双星彩塑新材料股份有限公司 Heat shrinkage copolyester film and preparation method thereof
CN103223758A (en) * 2013-04-17 2013-07-31 安徽国风塑业股份有限公司 BOPET film for building engineering and its making method
CN103522713A (en) * 2013-10-10 2014-01-22 宁波东旭成新材料科技有限公司 Low-shrinkage rate bidirectional stretching plastic thin film and preparation method thereof
CN107745509A (en) * 2017-09-13 2018-03-02 昆山市张浦彩印厂 The preparation method of multi-layer co-extrusion two-way stretching laminated film
CN108656695A (en) * 2018-04-20 2018-10-16 嘉兴市豪能科技股份有限公司 A kind of aluminium crystalline substance label aluminized paper and preparation method thereof
CN108717824A (en) * 2018-04-20 2018-10-30 嘉兴市豪能科技股份有限公司 A kind of aluminium crystalline substance label and preparation method thereof

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7569276B2 (en) * 2003-12-22 2009-08-04 Dupont Teijin Films U.S. Limited Partnership Thermoformable polyester-containing laminates
CA2640313C (en) * 2006-02-16 2013-04-09 Cryovac, Inc. Coextruded heat-shrinkable polyester film
CN101367285B (en) * 2008-08-30 2012-01-04 富维薄膜（山东）有限公司 Polyester film and methods for making same

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102848587A (en) * 2011-06-30 2013-01-02 江苏裕兴薄膜科技股份有限公司 Method for preparing reflective film with light diffusion effect on surface
CN102848587B (en) * 2011-06-30 2015-05-13 江苏裕兴薄膜科技股份有限公司 Method for preparing reflective film with light diffusion effect on surface
CN102390194A (en) * 2011-08-21 2012-03-28 安徽国风塑业股份有限公司 Ultrathin TTR (Thermal Transfer Ribbon) polyester film and preparation method thereof
US20130095371A1 (en) * 2011-10-14 2013-04-18 Avery Dennison Corporation Shrink Film for Label
US10525678B2 (en) * 2011-10-14 2020-01-07 Avery Dennison Corporation Shrink film for label
CN103203934B (en) * 2013-03-26 2015-04-08 江苏双星彩塑新材料股份有限公司 Heat shrinkage copolyester film and preparation method thereof
CN103203934A (en) * 2013-03-26 2013-07-17 江苏双星彩塑新材料股份有限公司 Heat shrinkage copolyester film and preparation method thereof
CN103223758A (en) * 2013-04-17 2013-07-31 安徽国风塑业股份有限公司 BOPET film for building engineering and its making method
CN103223758B (en) * 2013-04-17 2016-07-20 安徽国风塑业股份有限公司 A kind of architectural engineering BOPET film and preparation method thereof
CN103522713A (en) * 2013-10-10 2014-01-22 宁波东旭成新材料科技有限公司 Low-shrinkage rate bidirectional stretching plastic thin film and preparation method thereof
CN107745509A (en) * 2017-09-13 2018-03-02 昆山市张浦彩印厂 The preparation method of multi-layer co-extrusion two-way stretching laminated film
CN108656695A (en) * 2018-04-20 2018-10-16 嘉兴市豪能科技股份有限公司 A kind of aluminium crystalline substance label aluminized paper and preparation method thereof
CN108717824A (en) * 2018-04-20 2018-10-30 嘉兴市豪能科技股份有限公司 A kind of aluminium crystalline substance label and preparation method thereof
CN108656695B (en) * 2018-04-20 2021-04-20 嘉兴市豪能科技股份有限公司 Aluminum-plated paper for aluminum crystal label and preparation method thereof
CN108717824B (en) * 2018-04-20 2021-04-20 嘉兴市豪能科技股份有限公司 Aluminum crystal label and preparation 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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