CN101367284A - White polyester film - Google Patents
White polyester film Download PDFInfo
- Publication number
- CN101367284A CN101367284A CNA2008101397056A CN200810139705A CN101367284A CN 101367284 A CN101367284 A CN 101367284A CN A2008101397056 A CNA2008101397056 A CN A2008101397056A CN 200810139705 A CN200810139705 A CN 200810139705A CN 101367284 A CN101367284 A CN 101367284A
- Authority
- CN
- China
- Prior art keywords
- white
- polyester film
- top layer
- polyester
- pbt
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
- Laminated Bodies (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
Abstract
The invention discloses a white polyester film. The white polyester film has a laminated structure which comprises one or two white surface layers and a base layer, wherein main compositions of each white surface layer are crystalline polyester and white pigment; main composition of the base layer is polyester homopolymer; and each white surface layer and the base layer are in direct co-extrusion compounding. Under the condition of reducing the addition amount of white master batches, the polyester film disclosed by the invention can still improve the whiteness and the opacity of the polyester film and keep the excellent mechanical property of the polyester film, thereby reducing production cost; and the white polyester film simplifies a production process, is well suitable for the requirements of industrialized production and is very favorable for carrying out rapid breed conversion when films with different colors are produced.
Description
Technical field
The present invention relates to the polyester film technical field, relate in particular to a kind of polyester film that is used for label, advertising lamp box, color steel and flexible package printing etc.
Background technology
White biaxial stretching polyester film has obtained good application in fields such as label, advertising lamp box, color steels, at the flexible package print field, good application prospects is arranged also.The present used polyester film of flexible package, the end case more than 80% all need the white printing, expend a large amount of white inks, if adopt white polyester film can save white printing, help energy-saving and emission-reduction.
But the thickness of commercially available white polyester film is not suitable for flexible package and uses more than 50um, needs to add a large amount of white TiO 2 pigments in the preparation, not only makes difficulty, and mechanical properties in films also obviously reduces.
Summary of the invention
Technical problem to be solved by this invention is: a kind of white polyester film is provided, this polyester film is under the condition that reduces the white master material addition, still can improve the whiteness and the opacity of polyester film, and can keep the polyester film excellent mechanical property.
For solving the problems of the technologies described above, technical scheme of the present invention is: white polyester film, described white polyester film has layer structure, and described layer structure comprises one or two white top layer, and the Main Ingredients and Appearance in described each white top layer is crystalline polyester and Chinese white; A basic unit, the Main Ingredients and Appearance of described basic unit is a polyester homopolymer; Described each white top layer and described basic unit be directly coextru-lamination all.
Wherein, described Chinese white is a titanium dioxide, and the content of described titanium dioxide in described each top layer is 10～25wt%.
Wherein, described crystalline polyester is one or more the mixture in PETG, PTT and the polybutylene terephthalate (PBT).
Wherein, described crystalline polyester is the mixture of PETG and polybutylene terephthalate (PBT), the content of described PETG in a top layer is 10～25wt%, and the content of described polybutylene terephthalate (PBT) in a top layer is 50～80wt%.
Wherein, when described white polyester film has a white top layer, the thickness on this white top layer is 10～30% of polyester film gross thickness, and when described white polyester film had two white top layers, the thickness on each white top layer was 10～15% of polyester film gross thickness.
After having adopted technique scheme, the invention has the beneficial effects as follows: owing in white top layer, contain crystalline polyester and Chinese white composition, in the thermal finalization stage, the crystalline polyester component can form the crystalline solid of white, increase the whiteness and the opacity of polyester film, therefore can significantly reduce the addition of white polyester masterbatch.And the Main Ingredients and Appearance of basic unit is a polyester homopolymer, during manufacturing, can adopt bright PET chips, antitack agent section and reclaimed materials section to be raw material, and not only raw material obtains easily, and cost is low.Owing to adopt such layer structure, under the condition that reduces the white master material addition, still can improve the whiteness and the opacity of polyester film, and can keep the polyester film excellent mechanical property, thereby reduced production cost, simplify production technology, adapted to industrial production requirement well, be very beneficial for when producing the film of different colours, carrying out quick grade change.
The specific embodiment
The invention will be further described below in conjunction with specific embodiment.Following examples only are used to illustrate the present invention, are not used in restriction protection scope of the present invention.
Embodiment 1
Prescription:
1) white top layer
White master material 40wt%
PBT(IV＝0.8) 60wt％；
Wherein, the effective ingredient of white master material is a titanium dioxide, and concentration is 50wt%, and carrier is PETG (PET).
2) basic unit
Bright PET chips (IV=0.65) 70wt%
Silicon-containing additive section (3000ppm) 15wt%
Film reclaimed materials section (IV=0.55) 15wt%.
Process:
After white top layer material mixed by proportioning, add double screw extruder and melt extrude, extruder is respectively distinguished temperature and is controlled at 235～250 ℃.
Basic unit's material is mixed by proportioning, after drying, add single screw extrusion machine and melt extrude, extruder is respectively distinguished temperature and is controlled at 260～280 ℃.
The weight ratio of the extrusion capacity of white top layer extruder and basic unit's extruder is 30:70.
The melt of being extruded by two extruders passes through co-extrusion die head respectively, in the moulding of sharp cooling roll direct casting sheet, 25～35 ℃ of sharp cooling roll temperature;
The casting sheet that obtains through 60～80 ℃ preheating after, 3.0 times of longitudinal stretchings, and then through after 100～120 ℃ of preheatings, 3.0 times of cross directional stretch, finalized the design 1～5 second down at 180～220 ℃ then, through supercooling, corona, rolling with cut, obtaining a top layer is the opaque polyester film of white at last, and its performance sees Table 1.
Embodiment 2
Prescription:
1) white top layer
White master material 30wt%
PBT(IV＝0.8) 70wt％；
Wherein, the effective ingredient of white master material is a titanium dioxide, and concentration is 50wt%, and carrier is PET.
2) basic unit
Bright PET chips (IV=0.65) 70wt%
Silicon-containing additive section (3000ppm) 30wt%.
Process is identical with embodiment 1, the opaque polyester film of the white that obtains, and its performance sees Table 1.
Embodiment 3
Prescription:
1) white upper epidermis
White master material 20wt%
PBT(IV＝0.8) 80wt％；
Wherein, the effective ingredient of white master material is a titanium dioxide, and concentration is 50wt%, and carrier is PET.
2) basic unit
Bright PET chips (IV=0.65) 70wt%
Silicon-containing additive section (3000ppm) 30wt%.
3) top layer under the white
White master material 20wt%
PBT(IV＝0.8) 80wt％；
Wherein, the effective ingredient of white master material is a titanium dioxide, and concentration is 50wt%, and carrier is PET.
Process is substantially the same manner as Example 1, and its difference is, needs to increase by one and is used for the white double screw extruder on top layer down, and white upper epidermis extruder, basic unit's extruder and the white weight ratio of the extrusion capacity of top layer extruder down are 15:70:15.
Embodiment 4
Prescription:
1) white upper epidermis
White master material 50wt%
PBT(IV＝0.8) 50wt％；
Wherein, the effective ingredient of white master material is a titanium dioxide, and concentration is 50wt%, and carrier is PET.
2) basic unit
Bright PET chips (IV=0.65) 70wt%
Silicon-containing additive section (3000ppm) 30wt%.
3) top layer under the white
White master material 50wt%
PBT(IV＝0.8) 50wt％；
Wherein, the effective ingredient of white master material is a titanium dioxide, and concentration is 50wt%, and carrier is PET.
Process is substantially the same manner as Example 1, and its difference is, needs to increase by one and is used for the white double screw extruder on top layer down, and white upper epidermis extruder, basic unit's extruder and the white weight ratio of the extrusion capacity of top layer extruder down are 10:80:10.
Comparative Examples 1
Prescription
White master material 20wt%,
Bright PET chips (IV=0.65) 80wt%,
Wherein, the effective ingredient of white master material is a titanium dioxide, and concentration is 50wt%, and carrier is PET.
Process
Material is mixed by proportioning, after drying, add single screw extrusion machine and melt extrude.Extruder is respectively distinguished temperature and is controlled at 260～280 ℃.
Extrude the casting sheet by die head, then by known thin-film technique respectively through vertical draw, horizontally draw, thermal finalization, obtain the individual layer white polyester film, its performance sees Table 1.
The properties of sample of described embodiment and Comparative Examples is to such as table 1.
The properties of sample table of comparisons of table 1 embodiment of the invention and Comparative Examples
| Thickness, um | Hot strength, MPa (MD/TD) | Light transmittance, % | Mist degree, % | Whiteness, % | TiO 2Content, wt% | |
| Embodiment 1 | 10 | 190/190 | 30 | >100％ | 92 | 6 |
| Embodiment 2 | 20 | 200/200 | 35 | >100％ | 90 | 4.5 |
| Embodiment 3 | 30 | 210/210 | 40 | >100％ | 88 | 3 |
| Embodiment 4 | 8 | 180/180 | 28 | >100％ | 94 | 7.5 |
| Comparative Examples 1 | 50 | 160/150 | 50 | >100％ | 88 | 10 |
As can be seen from Table 1, disclosed polyester film is under the condition that reduces the white master material addition, still can improve the whiteness and the opacity of polyester film, and can keep the polyester film excellent mechanical property, especially estimable is that the advantage of mechanical property is to obtain under the condition that film thickness reduces.
The present invention is not limited to the foregoing description, in order to reach corresponding performance, in any one rete of polyester film, all can add antistatic additive, antioxidant, slipping agent, the composition of one or more in the function additives such as antioxidant, and can not influence its serviceability.
As Chinese white, the preferred titanium dioxide of the present invention, but it is a kind of to be not limited to titanium dioxide, can also be silica or barium sulfate etc.
In the top layer, in order to reduce the addition of Chinese white, should use crystalline polyester, can form white crystalline solid at thermal finalization stage crystallization polyester component, increase the whiteness and the opacity of polyester film.Therefore, when making the top layer, its raw material is not limited to polybutylene terephthalate (PBT) (PBT), the carrier of white master material also is not limited to PETG (PET), for example, the raw material on top layer can be one or more the mixture in PETG, PTT (PTT) and the polybutylene terephthalate (PBT), the carrier of white master material also can be one or more the mixture in PETG, PTT and the polybutylene terephthalate (PBT), or the like.
The component of basic unit of the present invention can adopt the prescription of conventional transparent polyester film as can be known, and used resin can include polyester homopolymer such as light PET section, silicon-containing additive section, the section of conventional film reclaimed materials.
The thickness of polyester film of the present invention is 12～100um, is 12～20um as the most frequently used thickness of flexible package.
Claims (5)
1. white polyester film is characterized in that:
Described white polyester film has layer structure, and described layer structure comprises
One or two white top layer, the Main Ingredients and Appearance in described each white top layer is crystalline polyester and Chinese white;
A basic unit, the Main Ingredients and Appearance of described basic unit is a polyester homopolymer;
Described each white top layer and described basic unit be directly coextru-lamination all.
2. white polyester film as claimed in claim 1 is characterized in that: described Chinese white is a titanium dioxide, and the content of described titanium dioxide in described each top layer is 10～25wt%.
3. white polyester film as claimed in claim 2 is characterized in that: described crystalline polyester is one or more the mixture in PETG, PTT and the polybutylene terephthalate (PBT).
4. white polyester film as claimed in claim 3, it is characterized in that: described crystalline polyester is the mixture of PETG and polybutylene terephthalate (PBT), the content of described PETG in a top layer is 10～25wt%, and the content of described polybutylene terephthalate (PBT) in a top layer is 50～80wt%.
5. as described any white polyester film of claim 1 to 4, it is characterized in that: when described white polyester film has a white top layer, the thickness on this white top layer is 10～30% of polyester film gross thickness, when described white polyester film had two white top layers, the thickness on each white top layer was 10～15% of polyester film gross thickness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101397056A CN101367284A (en) | 2008-08-30 | 2008-08-30 | White polyester film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101397056A CN101367284A (en) | 2008-08-30 | 2008-08-30 | White polyester film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101367284A true CN101367284A (en) | 2009-02-18 |
Family
ID=40411344
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008101397056A Pending CN101367284A (en) | 2008-08-30 | 2008-08-30 | White polyester film |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101367284A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102602104A (en) * | 2012-02-28 | 2012-07-25 | 湖北图新材料科技有限公司 | BOPET (biaxially oriented polyester) matte white film substrate for preparing labels and preparation method thereof |
| CN102822251A (en) * | 2010-03-31 | 2012-12-12 | 可隆工业株式会社 | Heat-shrinkable polyester-based film and heat-shrinkable polyester-based label |
| US20150068601A1 (en) * | 2012-03-14 | 2015-03-12 | Toyobo Co., Ltd. | Sealing sheet for back surface of solar cell, and solar cell module |
| CN106393918A (en) * | 2016-08-29 | 2017-02-15 | 浙江强盟实业股份有限公司 | Delustering white polyester film and preparation method therefor |
| WO2018000411A1 (en) * | 2016-07-01 | 2018-01-04 | The Procter & Gamble Company | Heat-sealable multilayer packaging film with improved opacity |
| US10576718B2 (en) | 2016-07-01 | 2020-03-03 | The Proctor & Gamble Company | Heat sealable multilayer packaging film with improved opacity |
-
2008
- 2008-08-30 CN CNA2008101397056A patent/CN101367284A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102822251A (en) * | 2010-03-31 | 2012-12-12 | 可隆工业株式会社 | Heat-shrinkable polyester-based film and heat-shrinkable polyester-based label |
| CN102822251B (en) * | 2010-03-31 | 2015-08-26 | 可隆工业株式会社 | Heat shrinkable polyester class film and heat shrinkable polyester class label |
| CN102602104A (en) * | 2012-02-28 | 2012-07-25 | 湖北图新材料科技有限公司 | BOPET (biaxially oriented polyester) matte white film substrate for preparing labels and preparation method thereof |
| US20150068601A1 (en) * | 2012-03-14 | 2015-03-12 | Toyobo Co., Ltd. | Sealing sheet for back surface of solar cell, and solar cell module |
| US10896987B2 (en) * | 2012-03-14 | 2021-01-19 | Toyobo Co., Ltd. | Sealing sheet for back surface of solar cell, and solar cell module |
| WO2018000411A1 (en) * | 2016-07-01 | 2018-01-04 | The Procter & Gamble Company | Heat-sealable multilayer packaging film with improved opacity |
| US10576718B2 (en) | 2016-07-01 | 2020-03-03 | The Proctor & Gamble Company | Heat sealable multilayer packaging film with improved opacity |
| CN106393918A (en) * | 2016-08-29 | 2017-02-15 | 浙江强盟实业股份有限公司 | Delustering white polyester film and preparation method therefor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101367284A (en) | White polyester film | |
| CN109263080B (en) | Artificial composite synthetic paper with improved printing performance and preparation method thereof | |
| CN108995336B (en) | Print compound polyethylene film and preparation method thereof | |
| KR101819774B1 (en) | Decoration sheet | |
| CN106739367B (en) | A kind of single-face matt polyester film and preparation method thereof | |
| KR101176604B1 (en) | Biodegradable double film using wood polymer composition and method for manufacturing that | |
| CN108314818B (en) | Extinction casting PE film and preparation method thereof | |
| WO2021121144A1 (en) | High-performance ecological spc floor board and preparation process therefor | |
| CN1579742A (en) | High transparent multi-layer coextrusion biaxially-oriented polyester film and its production method | |
| KR20120041974A (en) | Multi-layer biodegradable film | |
| CN111231470A (en) | Multilayer co-extruded polyethylene heat shrinkable film and preparation method thereof | |
| CN104943308A (en) | Polypropylene synthetic paper and production method thereof | |
| CN104175676A (en) | Highly transparent polyethylene shrink film and film blowing technology thereof | |
| KR20040015243A (en) | Multilayer Polymeric Films | |
| CN103753932B (en) | Directly-compoundable low-melting-point polyester thin film preparation method for laminated steel | |
| CN106313828B (en) | PETG/PET/PETG co-extrusion diaphragm and its extrusion molding process | |
| CN101259771A (en) | Single-face matt polyester film and preparation method thereof | |
| CN101381508B (en) | White biaxial stretching polyester film and production method thereof | |
| JP4259980B2 (en) | Five-layer coextrusion biaxially oriented polypropylene pearl gloss synthetic paper and its production method | |
| JP2001030328A (en) | IMPROVED METHOD FOR PRODUCING BIAXIALLY STRETCHED POLYPROPYLENE (BOPP) PEARL GLOSS SYNTHETIC PAPER WITH THICKNESS OF 25-25 mum OBTAINED BY THREE-LAYER COEXTRUSION SYSTEM DUE TO SINGLE SCREW EXTRUDER | |
| CN113561596A (en) | Composite forming sheet for delicate printing and preparation method thereof | |
| CN106827568A (en) | A kind of polyester film production technology of use reclaimed materials | |
| CN110421938A (en) | A kind of preparation method of tearable polyester film | |
| CN108676335A (en) | A kind of preparation method of high transparency polylactic acid film | |
| CN114106535A (en) | Degradable pearlized film and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090218 |