CN1660568A - Sub-smooth type polyester film at least in single side and fabricating method - Google Patents
Sub-smooth type polyester film at least in single side and fabricating method Download PDFInfo
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- CN1660568A CN1660568A CN 200410016500 CN200410016500A CN1660568A CN 1660568 A CN1660568 A CN 1660568A CN 200410016500 CN200410016500 CN 200410016500 CN 200410016500 A CN200410016500 A CN 200410016500A CN 1660568 A CN1660568 A CN 1660568A
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- layer
- polyester film
- biaxially oriented
- matt
- oriented polyester
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- 229920006267 polyester film Polymers 0.000 title claims abstract description 67
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000010410 layer Substances 0.000 claims abstract description 137
- 239000002344 surface layer Substances 0.000 claims abstract description 8
- 239000000654 additive Substances 0.000 claims description 57
- 230000000996 additive effect Effects 0.000 claims description 52
- 239000002994 raw material Substances 0.000 claims description 27
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 22
- 239000002245 particle Substances 0.000 claims description 20
- 229920000728 polyester Polymers 0.000 claims description 18
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 239000000377 silicon dioxide Substances 0.000 claims description 11
- 238000005096 rolling process Methods 0.000 claims description 10
- 238000005266 casting Methods 0.000 claims description 8
- LYCAIKOWRPUZTN-UHFFFAOYSA-N ethylene glycol Natural products OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 8
- 229920005644 polyethylene terephthalate glycol copolymer Polymers 0.000 claims description 8
- 238000001125 extrusion Methods 0.000 claims description 7
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 229920001707 polybutylene terephthalate Polymers 0.000 claims description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 4
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 claims description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 4
- -1 glycol ester Chemical class 0.000 claims description 4
- 229920000642 polymer Polymers 0.000 claims description 4
- 239000003381 stabilizer Substances 0.000 claims description 4
- 229920001634 Copolyester Polymers 0.000 claims description 3
- 239000006096 absorbing agent Substances 0.000 claims description 3
- 239000003963 antioxidant agent Substances 0.000 claims description 3
- 230000003078 antioxidant effect Effects 0.000 claims description 3
- 238000004040 coloring Methods 0.000 claims description 3
- 239000000314 lubricant Substances 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 239000005995 Aluminium silicate Substances 0.000 claims description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 2
- 239000004793 Polystyrene Substances 0.000 claims description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 2
- 235000012211 aluminium silicate Nutrition 0.000 claims description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 2
- 239000001506 calcium phosphate Substances 0.000 claims description 2
- 229910000389 calcium phosphate Inorganic materials 0.000 claims description 2
- 235000011010 calcium phosphates Nutrition 0.000 claims description 2
- 239000006229 carbon black Substances 0.000 claims description 2
- 238000003851 corona treatment Methods 0.000 claims description 2
- 238000009998 heat setting Methods 0.000 claims description 2
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims description 2
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 2
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 claims description 2
- 239000001095 magnesium carbonate Substances 0.000 claims description 2
- 229910000021 magnesium carbonate Inorganic materials 0.000 claims description 2
- 239000006259 organic additive Substances 0.000 claims description 2
- 229920002223 polystyrene Polymers 0.000 claims description 2
- 239000000454 talc Substances 0.000 claims description 2
- 229910052623 talc Inorganic materials 0.000 claims description 2
- 235000012222 talc Nutrition 0.000 claims description 2
- 239000004408 titanium dioxide Substances 0.000 claims description 2
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 claims description 2
- 239000000155 melt Substances 0.000 claims 2
- VQLYBLABXAHUDN-UHFFFAOYSA-N bis(4-fluorophenyl)-methyl-(1,2,4-triazol-1-ylmethyl)silane;methyl n-(1h-benzimidazol-2-yl)carbamate Chemical compound C1=CC=C2NC(NC(=O)OC)=NC2=C1.C=1C=C(F)C=CC=1[Si](C=1C=CC(F)=CC=1)(C)CN1C=NC=N1 VQLYBLABXAHUDN-UHFFFAOYSA-N 0.000 abstract 1
- 239000010408 film Substances 0.000 description 51
- 238000012545 processing Methods 0.000 description 20
- 238000002834 transmittance Methods 0.000 description 19
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 7
- 235000010724 Wisteria floribunda Nutrition 0.000 description 7
- 229910052710 silicon Inorganic materials 0.000 description 7
- 239000010703 silicon Substances 0.000 description 7
- 230000015572 biosynthetic process Effects 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 230000003287 optical effect Effects 0.000 description 5
- 238000012856 packing Methods 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 239000012528 membrane Substances 0.000 description 4
- 238000006068 polycondensation reaction Methods 0.000 description 4
- 206010009866 Cold sweat Diseases 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 239000002932 luster Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000032050 esterification Effects 0.000 description 2
- 238000005886 esterification reaction Methods 0.000 description 2
- 239000003063 flame retardant Substances 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000003746 surface roughness Effects 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- 239000004416 thermosoftening plastic Substances 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000005269 aluminizing Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 235000019592 roughness Nutrition 0.000 description 1
- 238000010189 synthetic method Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
A bidirectionally stretched polyester film has at least three extruded layers. At least one surface layer is dull. Its preparing process is also disclosed. Its advantage is adjustable low lustre.
Description
Technical field
The invention belongs to packet industry, relate to a kind of polyester film, further, a kind of biaxially oriented polyester film and manufacturing process thereof, specifically, the present invention relates to a kind of low-luster, the three-layer co-extruded biaxially oriented polyester film and the production method thereof of single-face matt at least.
Background technology
Packaging industry biaxially oriented polyester film transparent to height all the time, high gloss has very big demand, because it can make surface of package have more gloss and attraction.Corresponding, the inferior optical thin film of low-luster, high transmission rate can make surface of package that dim sense and artistry are more arranged, and stimulates consumer more to the desire to purchase of this packaging product, in the also increase year by year of application of packet industry.
In order to make film produce the optical property of the uniqueness of low-luster and high transmission rate, those skilled in the art have done a lot of explorations and research.
The patent disclosure of patent No. US6358604 a kind of biaxially oriented polyester film of multi-layer co-extruded inferior light, the intermediate layer of this film is made of 80% thermoplastic polyester.Inferior light top layer is made of component I and component I I.Wherein component I is that PETG homopolymers or copolymer are formed, and component I I then is made up of the copolymer of PETG.This film is very suitable for the packing as packing film, particularly food and the consumer goods, also can be used for compound, aluminize, print and field such as industry.This patent is not described in detail additive, and the inferior luminosity less (about glossiness 50) on the inferior light of this film top layer, has limited its demand in a lot of fields.
The patent disclosure of patent No. US6630224 a kind of multi-layer co-extrusion two-way stretching polyester film of single-face matt at least, the inferior light top layer of this film has at least 70% thermoplastic polyester to constitute, and contains 1-10% (percentage by weight) in the inferior light top layer, average grain diameter is 2-5 μ m, the narrower additive of Size Distribution.This film has unique optical characteristics, is very suitable for packing and industrial circle.But the inferior luminosity of the film of this patent less (about glossiness 50) has limited its application in a lot of fields.
The patent disclosure of patent No. US6607808 a kind of biaxially oriented polyester film, this film contains at least one base copolyester and a matt surface layer.This film has higher inferior luminosity, good light transmittance, and good machinability is particularly suitable for packing and industrial circle.Reclaiming section in the manufacturing process of this film can be recycling, and content can reach 60% (percentage by weight).But the inferior luminosity of the film of this patent still is less (about glossiness 35), thereby its application also is very limited.
The patent disclosure of patent No. US2003/0118817 a kind of heat sealable, fire-retardant multi-layer co-extrusion two-way stretching polyester film.This film contains at least one intermediate layer, a heat sealable superficial layer and a matt surface layer, and contain a kind of fire retardant at least.But the inferior luminosity of mentioned matt surface less (about glossiness 50) in this patent, thereby limited its application in a lot of fields.
Based on above the deficiencies in the prior art, it is a kind of improved that this area needs, the biaxially oriented polyester film that inferior luminosity can suitably be regulated as required, and it also should have good processing characteristics, is applicable to the various uses of packet industry.
Summary of the invention
Technical problem to be solved by this invention is, because the less or more high deficiency of glossiness of the inferior luminosity of biaxially oriented polyester film ubiquity of the prior art, hindered its application in a lot of fields, for solving these technical problems, the invention provides a kind of biaxially oriented polyester film, described polyester film contains at least three layers coextruded structure, and wherein having a superficial layer at least is matt surface.Wherein, the glossiness of matt surface is less than 70%, preferably less than 50%, better less than 35%.The light transmittance of film is generally greater than 70%, and is preferably greater than 75%, best greater than 80%.
Among the present invention, being used to produce the raw material of biaxially oriented polyester film, can be PETG (PET), poly-to naphthalene diacid glycol ester (PEN), a kind of in polybutylene terephthalate (PBT) (PBT) and the copolyester thereof etc., preferably PET.The method of preparation can be ester-interchange method and esterification process.The inherent viscosity of used PETG [η] is generally 0.55-0.80, is preferably 0.58-0.75, is preferably 0.60-0.70.The inherent viscosity that is used for the polyester of surfaces A layer and C layer and middle B layer can not differ greatly, in order to avoid production process produces flowing instability, film has striped.
As an embodiment of the invention, described polyester film contains three-layer co-extruded structure, comprises an intermediate layer B layer, a matt surface A layer, and a surface C layer.Wherein, the surface C layer can be a kind of in matt layer, common layer or the highlighted layer as required.Add special additive in the matt surface A layer, the surface C layer adds different additives as required, middle B layer can in can contain additive and reclaim section.
The surface roughness Ra value of the matt surface of biaxially oriented polyester film of the present invention is generally in the 100-1500nm scope, and is preferably in the 150-1200nm scope, best in the 200-800nm scope.
Biaxially oriented polyester film of the present invention has higher light transmittance, and is generally greater than 70%, preferably greater than 75%, best greater than 80%.
The coefficient of friction of biaxially oriented polyester film of the present invention is generally 0.2-0.6, is preferably 0.25-0.55, is preferably 0.30～0.50.
Biaxially oriented polyester film of the present invention has three-decker at least, wherein has an intermediate layer B layer and a matt surface A layer at least, and what another surface C layer can be in matt layer, common layer or the highlighted layer is a kind of.The raw material of surfaces A layer and C layer can be different with middle B layer, but preferably use the polyester raw material identical with the B layer.Matt surface A layer contains special additive, and the surface C layer adds different additives as required, and the B layer can add to reclaim cuts into slices, and also can add additive.Adding the recovery section in middle B layer can reduce production costs, and the content of described recovery section is in the 0.001-30% scope.
In order to obtain desirable inferior luminosity, contain the additive of 1.0-10% (percentage by weight) in the matt surface A layer, better contain the additive of 1.5-9.0%, preferably contain the additive of 2.0-8.0%.Content of additive is discontented with 1.0%, then can not get desirable matt effect; Additive level is too high, causes that film stretching intensity is low because the dispersion of additive is bad, causes rupture of membranes.Typical additive is divided into organic additive and inorganic additive, includes but not limited to calcium carbonate, silica, talcum, magnesium carbonate, brium carbonate, calcium phosphate, aluminium oxide, titanium dioxide, carbon black, kaolin, crosslinked polystyrene particle, cross linked acrylic particle etc.The selected additive of the present invention can adopt the above-mentioned additive of identical chemical composition, variable grain size, also can adopt the additive of two or more different chemical composition.These additives can adopt diverse ways, add to different concentration in each layer of biaxially oriented polyester film, for example can adopt in polycondensation process, to add the method that the ethylene glycol liquid that contains additive is made female section, also can adopt the method for twin-screw extruded polymer additive package.The additive of selecting for use is glue or chain silica preferably, because between it and the polyester good caking property is arranged, and its refractive index and polyester are approaching, satisfy the requirement of film higher light transmittance.
For making film have very high inferior luminosity (being that glossiness is very low) and good processing properties, the average grain diameter of additive is 0.01-8.0 μ m among the matt surface layer A, is preferably 0.02-7.5 μ m, is preferably 0.04-5.0 μ m.If particle diameter is too little, then film can not obtain very high inferior luminosity; If particle diameter is too big, then additive is easy to be filtered in the thin film fabrication process, and production cost is increased.
In the present invention, the surface C layer can be a kind of in matt layer, common layer or the highlighted layer as required.If the surface C layer is a matt layer, the concentration of its additive, particle diameter are identical with additive in the surfaces A layer.If the surface C layer is highlighted layer, the concentration of its additive is generally 0.01-0.4% (percentage by weight), is preferably 0.02-0.3%, is preferably 0.04-0.2%.For improving the brightness of surface C layer, the additive of selecting for use is glue or chain silica preferably simultaneously, because between it and the polyester good caking property is arranged, the back hole that therefore stretches is less.And hole is the main cause that causes the film mist degree.For improving the adhesion between additive and the polyester, the wherein a kind of of the used silica of the present invention is nanometer grade silica, and its size is generally less than 100nm, better less than 60nm, is preferably in the 20-50nm scope; Simultaneously for to make made biaxially oriented polyester film that good processing properties be arranged, splitting winding performance particularly, the present invention has also adopted micron silica, and its size is generally in the 0.5-8.0 mu m range, more fortunately in the 1.0-6.0 mu m range, be preferably in the 1.5-5.0 mu m range.If the surface C layer is common layer, the concentration that the concentration of its additive is generally its additive is generally 0.01-0.5% (percentage by weight), is preferably 0.03-0.4%, is preferably 0.05-0.3%.The additive of selecting for use is micron-sized silica.
In the present invention, middle B layer and other each layer also can contain various additives, include but not limited to stabilizing agent, antistatic additive, lubricant, antioxidant, colouring agent, UV absorbers, antiblocking agent etc.
Among the present invention, matt surface A layer thickness is generally in the 0.3-5.0 mu m range, preferably in the 0.5-4.5 mu m range, preferably in the 1.0-4.0 mu m range.The C layer thickness can be identical with the A layer, also can be different.The thickness of whole three-layer co-extruded biaxially oriented polyester film generally in the 6.0-75 mu m range, in the 8.0-50 mu m range, is preferably in the 10-30 mu m range more fortunately.The thickness of middle B layer accounts for the 30-95% of all thickness.
Technical problem to be solved by this invention also is to provide a kind of production method of biaxially oriented polyester film, this method comprises: prepare three-decker at least polyester raw material, each layer extruded respectively, and to the fusion of coextruded structure, casting sheet, stretching, thermal finalization, lax, traction, rolling.
Among the present invention, the polyester film of three-layer co-extruded structure, middle B layer, the polymer of surfaces A layer and C layer is extruded through three screw extruders respectively, extruder can be a single screw extrusion machine, it also can be double screw extruder, polyester raw material is less than 50ppm through dried moisture, preferably less than 30ppm, polyester raw material melt extrudes in extruder after the co-extrusion module and arrives cold drum by T type flat-die die head, the temperature of cold drum is generally less than 50 ℃, preferably less than 30 ℃, in order to obtain good casting sheet effect, can be preferably the auxiliary casting of static sheet with static auxiliary casting sheet or the auxiliary casting of air-flow sheet, pass through subsequently vertically, laterally biaxial tension, thermal finalization is handled, lax, cooling, traction, rolling.
Biaxial tension of the present invention is generally one by one and stretches, preferably first longitudinal stretching (MD) back cross directional stretch (TD), make the polyester molecule chain orientation, longitudinal stretching can be undertaken by predefined different stretch multiplying power with the roller of two friction speeds, and cross directional stretch generally carries out horizontal the drawing in the baking oven of Band clamp.
Draft temperature can require to adjust in the scope of a broad usually according to film performance, vertical La Wendu is generally 75-120 ℃, horizontal La Wendu is 85-140 ℃, indulging draws multiplying power to be generally 2.5: 1-6.0: 1, be preferably 3.0: 1-5.0: 1, vertical drawing can divide several sections to carry out, and also can one section carries out.The horizontal multiplying power of drawing is generally 3.0: 1-5.0: 1, be preferably 3.5: 1-4.5: 1.Before horizontal drawing, film single face or two sides can be carried out online coating with known coating method and handled, and online coating is handled and is used to strengthen the fastness of compound fastness or printing of aluminizing usually, also can be used to provide antistatic or other performances.
In the method for the present invention, the temperature of thermal finalization generally is controlled at 150-250 ℃, and heat-setting time is generally 0.1-10 second.After biaxial tension, the film single or double will carry out sided corona treatment usually, and the surface tension that makes polyester film is more than 52mN/m.
At least one surface of biaxially oriented polyester film of the present invention has inferior light characteristic, and another surface can have special optical characteristics as required, and film has good processing characteristics, is applicable to various packings and industrial circle.
The prepared biaxially oriented polyester film of the present invention not only has unique optical property, for example the glossiness of matt surface is very low, and the glossiness on highlighted surface is very high, and has good machinability, particularly rolling is cut functionally, and its concrete characteristic index sees Table 1.
The concrete characteristic index of table 1 biaxially oriented polyester film of the present invention
| Project | The invention index | Better | Best | Unit | Method of testing |
| The matt surface layerGlossiness, 60 ° of surface roughnesses, Ra additive level additive particle diameter | ?＜70％ ?100-1500 ?1.0-10 ?0.01-8.0 | ?＜50％ ?150-1200 ?1.5-9.0 ?0.02-7.5 | ?＜35％ ?200-800 ?2.0-8.0 ?0.04-5.0 | nm ％ μm | ?GB/T2410-1980 |
| Highlighted superficial layerGlossiness, 60 ° of additive level additive particle diameters Whole filmThe light transmittance coefficient of friction | ?＞165 ?0.01-0.4 ?＜100 ?0.5-8.0 ?＞70 ?0.2-0.6 | ?＞170 ?0.02-0.3 ?＜60 ?1.0-6.0 ?＞75 ?0.25-0.55 | ??＞175 ??0.04-0.2 ??20-50 ??1.5-5.0 ??＞80 ??0.30～0.5 | ％ nm μm ％ | ??GB/T2410-1980 ??GB/T2410-1980 ??GB/T10006-1988 |
The specific embodiment
The present invention is further illustrated below in conjunction with embodiment, and following example is just as to explanation of the present invention, is not used in to limit the scope of the invention.
The preparation of embodiment 1 polyester raw material
Silica with different-grain diameter is blended in the ethylene glycol respectively, be mixed with the glycolic suspension of silica, synthetic method of polymers according to routine---directly polymerization (PTA method) is produced polyester slice, at first carry out esterification, carry out polycondensation reaction then, before polycondensation, add the glycolic suspension contain silica and the polycondensation catalyst in the prior art, stabilizing agent, at 280 ℃, vacuum 10-66.7Pa, mixing speed 40rpm, reaction time made female section between 2-3 hour.Female section M
1(IV=0.64) contain the silicon S350 of Fuji (particle diameter is 3.8 μ m) 3000ppm in, female section M
2(IV=0.65) contain the silicon S350 of Fuji (particle diameter is 3.8 μ m) 2000ppm in, Degussa OX-50 (particle diameter is 40nm) 1000ppm, female section M
3(IV=0.64) contain the silicon S430 of Fuji (particle diameter is 4.2 μ m) 10000ppm and Degussa OX-50 (particle diameter is 40nm) 40000ppm in.The used polyester slice raw material of the present invention sees Table 2.
The polyester slice raw material that table 2 the present invention is used
| Numbering | Raw material | Characteristic |
| F | The Yizheng has the light section greatly | IV＝0.66 |
| R | Reclaim section | Contain the silicon S350 of Fuji (particle diameter is 3.8 μ m) 600ppm IV=0.60 |
| ?M 1 | Female section 1 | Contain the silicon S350 of Fuji (particle diameter is 3.8 μ m) 3000ppm IV=0.64 |
| ?M 2 | Female section 2 | Contain the silicon S350 of Fuji (particle diameter is 3.8 μ m) 2000ppm and Degussa OX-50 (particle diameter is 40nm) 1000ppm IV=0.65 |
| ?M 3 | Female section 3 | Contain the silicon S430 of Fuji (particle diameter is 4.2 μ m) 10000ppm Degussa OX-50 (particle diameter is 40nm) 40000ppm IV=0.62 |
Embodiment 2
The performance test of biaxially oriented polyester film under different material and the parameter, itself and comparative example thin
The comparison of membrane structure and film performance
In the present embodiment, great deal of experiment data and experimental result have been described, change the parameters of biaxially oriented polyester film of the present invention item by item and listed consequent film performance, produce the parameter of the required the best of biaxially oriented polyester film of the present invention in order to proof, and can understand the difference that the film of biaxially oriented polyester film of the present invention and comparative example exists on structure and performance.The following stated E1-E12 is the experiment test that three-layer co-extruded polyester film of the present invention is changed different material and parameter; The C1 of the following stated is the experiment test of the film of comparative example.The concrete structure and the performance of the film that each example obtains are listed in table 3 and table 4.
E1：
Three-layer co-extruded polyester film is the ABC structure, and its intermediate layer B layer is raw materials used to be section F, and surfaces A layer and C layer are raw materials used all to be the section M of the section F and 60% (wt%) of 40% (wt%)
3B layer raw material melt extrudes by extruder through behind the crystallizing and drying, A layer and C layer raw material melt extrude by double screw extruder, three layers of raw material are by being furnished with the co-extrusion die head of co-extrusion block of ingredient, Electrostatic Absorption is at cold bulging direct casting sheet, sheet is made the polyester film that thickness is 19 μ m through longitudinal stretching, cross directional stretch, thermal finalization, lax, traction, rolling, and wherein A layer and C layer thickness are 2.5 μ m.Film has good light transmittance, and the glossiness of matt surface is very low, and processing characteristics is good.
E2：
Except surfaces A layer and C layer thickness are that all the other conditions are identical with E1 the 3.0 μ m.Film has good light transmittance, and the glossiness of matt surface is very low, and processing characteristics is good.
E3：
Except surfaces A layer and C layer raw materials used all by the section M of the section F and 40% (wt%) of 60% (wt%)
3Outside the formation, all the other conditions are identical with E1, and the film light transmittance is higher, and the matt surface glossiness is lower, and processing characteristics is good.
E4：
Except surfaces A layer and C layer raw materials used all by the section M of the section F and 70% (wt%) of 30% (wt%)
3Outside the formation, all the other conditions are identical with E1, and the film light transmittance is higher, and the matt surface glossiness is very low, and processing characteristics is general, and film surface has a little longitudinal stripe.
E5：
Section M except the raw materials used section F and 40% (wt%) by 60% (wt%) of surface C layer
1Outside the formation, all the other conditions are identical with E1.The film light transmittance is higher, and the glossiness of matt surface A layer is very low, and the surface C layer has higher glossiness, and film processing properties is good.
E6：
Section M except the raw materials used section F and 40% (wt%) by 60% (wt%) of surface C layer
2Outside the formation, thickness is that all the other conditions are identical with E1 outside the 1.5 μ m.The film light transmittance is higher, and the glossiness of matt surface A layer is very low, and the surface C layer has very high glossiness, and film processing properties is very good.
E7：
Except the raw material of intermediate layer B layer section M by the section F and 5% (wt%) of 95% (wt%)
3Outside the formation, all the other conditions are identical with E1.The glossiness of film is very low, and light transmittance is lower, and processing characteristics is good.
E8：
Except the section R formation of raw material by the section F and 20% (wt%) of 80% (wt%) of intermediate layer B layer, all the other conditions are identical with E1.The glossiness of film is very low, and light transmittance is higher, and processing characteristics is good.
E9：
Film thickness is 23 μ m, and wherein A layer and C layer thickness all are 3.0 μ m, and all the other conditions are identical with E1.The film glossiness is very low, and light transmittance is higher, and processing characteristics is good.
E10：
Film thickness is 16 μ m, and all the other conditions are identical with E1.The film glossiness is very low, and light transmittance is higher, and processing characteristics is good.
E11：
Film thickness is 12 μ m, and A and C layer thickness are 1.6 μ m, and all the other conditions are identical with E1.The film glossiness is very low, and light transmittance is higher, and processing characteristics is good.
E12：
Film thickness is 12 μ m, and A and C layer thickness are 1.6 μ m, and all the other conditions are identical with E5.The film glossiness is very low, and light transmittance is higher, and processing characteristics is good.
C1：
The raw material of membrane middle layer B layer is by the section M of the section R and 10% (wt%) of the section F and 20% (wt%) of 70% (wt%)
1Constitute, surfaces A layer and C layer by raw material all by the section M of the section F and 40% (wt%) of 60% (wt%)
1Constitute, all the other conditions are identical with E1.The glossiness of film obviously increases, and light transmittance increases.
The membrane structure of table 3 three-layer co-extruded polyester film of the present invention and comparative example
| For example | Thickness/μ m | Every layer thickness/μ m | Every layer of additive | Additive size/μ m | Additive level/ppm | ||||||||
| ?A | ?B | ?C | ?A | ?B | ?C | ?A | ??B | ?C | ?A | ?B | C | ||
| ?E1 | ?19 | ?2.5 | ?14 | ?2.5 | ?S430 ?OX-50 | ?0 | ?S430 ?OX-50 | ?4.2 ?0.04 | ??- | ?4.2 ?0.04 | ?6000 ?24000 | ?0 | 6000 24000 |
| ?E2 | ?19 | ?3.0 | ?13 | ?3.0 | ?S430 ?OX-50 | ?0 | ?S430 ?OX-50 | ?4.2 ?0.04 | ??- | ?4.2 ?0.04 | ?6000 ?24000 | ?0 | 6000 24000 |
| ?E3 | ?19 | ?2.5 | ?14 | ?2.5 | ?S430 ?OX-50 | ?0 | ?S430 ?OX-50 | ?4.2 ?0.04 | ??- | ?4.2 ?0.04 | ?4000 ?16000 | ?0 | 4000 16000 |
| ?E4 | ?19 | ?2.5 | ?14 | ?2.5 | ?S430 ?OX-50 | ?0 | ?S430 ?OX-50 | ?4.2 ?0.04 | ??- | ?4.2 ?0.04 | ?7000 ?28000 | ?0 | 7000 28000 |
| ?E5 | ?19 | ?2.5 | ?14 | ?2.5 | ?S430 ?OX-50 | ?0 | ?S350 | ?4.2 ?0.04 | ??- | ?3.8 | ?6000 ?24000 | ?0 | 1200 |
| ?E6 | ?19 | ?2.5 | ?15 | ?1.5 | ?S430 ?OX-50 | ?0 | ?S350 ?OX50 | ?4.2 ?0.04 | ??- | ?3.8 ?0.04 | ?6000 ?24000 | ?0 | 800 400 |
| ?E7 | ?19 | ?2.5 | ?14 | ?2.5 | ?S430 ?OX-50 | ?S430 ?OX-50 | ?S430 ?OX-50 | ?4.2 ?0.04 | ??4.2 ??0.04 | ?4.2 ?0.04 | ?6000 ?24000 | ?500 ?1200 | 6000 24000 |
| E8 | ?19 | ?2.5 | ?14 | ?25 | ?S430 ?OX-50 | ?S350 | ?S430 ?OX-50 | ?4.2 ?0.04 | ?3.8 | ?4.2 ?0.04 | 6000 24000 | ?120 | ?6000 ?24000 |
| E9 | ?23 | ?3.0 | ?17 | ?3.0 | ?S430 ?OX-50 | ?0 | ?S430 ?OX-50 | ?4.2 ?0.04 | ?- | ?4.2 ?0.04 | 6000 24000 | ?0 | ?6000 ?24000 |
| E10 | ?16 | ?2.5 | ?11 | ?2.5 | ?S430 ?OX-50 | ?0 | ?S430 ?OX-50 | ?4.2 ?0.04 | ?- | ?4.2 ?0.04 | 6000 24000 | ?0 | ?6000 ?24000 |
| E11 | ?12 | ?1.6 | ?8.4 | ?1.6 | ?S430 ?OX-50 | ?0 | ?S430 ?OX-50 | ?4.2 ?0.04 | ?- | ?4.2 ?0.04 | 6000 24000 | ?0 | ?6000 ?24000 |
| E12 | ?12 | ?1.6 | ?8.4 | ?1.6 | ?S430 ?OX-50 | ?0 | ?S350 | ?4.2 ?0.04 | ?- | ?3.8 | 6000 24000 | ?0 | ?6000 ?24000 |
| C1 | ?19 | ?2.5 | ?14 | ?2.5 | ?S350 | ?S350 | ?S350 | ?3.8 | ?3.8 | ?3.8 | 1200 | ?420 | ?1200 |
The film performance of table 4 three-layer co-extruded polyester film of the present invention and comparative example
| For example | Light transmittance % | Coefficient of friction (moving) A is in the face of the C face | Surface average roughness Ra, nm | Glossiness (60 °) | Processing characteristics | ||
| The A face | The C face | The A face | The C face | ||||
| ??E1 ??E2 ??E3 ??E4 ??E5 ??E6 ??E7 ??E8 ??E9 ??E10 ??E11 ??E12 ??C1 | ????80 ????78 ????83 ????75 ????81 ????85 ????73 ????78 ????75 ????83 ????85 ????86 ????87 | ????0.31 ????0.29 ????0.32 ????0.27 ????0.38 ????0.40 ????0.31 ????0.31 ????0.30 ????0.32 ????0.34 ????0.34 ????0.42 | ??480 ??480 ??400 ??560 ??480 ??480 ??480 ??480 ??550 ??450 ??425 ??425 ??120 | ??480 ??480 ??400 ??560 ??65 ??35 ??480 ??480 ??550 ??440 ??430 ??62 ??120 | ??32 ??25 ??44 ??23 ??35 ??35 ??29 ??31 ??23 ??34 ??35 ??37 ??140 | ??32 ??25 ??44 ??23 ??125 ??175 ??29 ??31 ??23 ??33 ??35 ??120 ??140 | ????++ ????++ ????++ ????+ ????++ ????++ ????++ ????++ ????++ ????++ ????++ ????++ ????++ |
Annotate:
++: can roll banding, rolling can be clamminess, and does not have longitudinal stripe, extraordinary processing characteristics.
+: can roll banding, rolling can be clamminess, and a little longitudinal stripe is arranged, and processing characteristics still can.
-: easy roll banding, rolling easily is clamminess, and longitudinal stripe is arranged, and processing characteristics is relatively poor.
Claims (22)
1. the biaxially oriented polyester film of single-face matt at least is characterized in that described polyester film contains at least three layers coextruded structure, and wherein having a superficial layer at least is matt surface, and its glossiness is 0%-70%.
2. the biaxially oriented polyester film of single-face matt at least according to claim 1 is characterized in that, the glossiness of described biaxially oriented polyester film is 0%-50%.
3. the biaxially oriented polyester film of single-face matt at least according to claim 1 is characterized in that, the glossiness of described biaxially oriented polyester film is 0%-35%.
4. the biaxially oriented polyester film of single-face matt at least according to claim 1, it is characterized in that, the raw material of described biaxially oriented polyester film is optional from PETG, and is poly-to naphthalene diacid glycol ester, a kind of in polybutylene terephthalate (PBT) and the copolyester thereof.
5. the biaxially oriented polyester film of single-face matt at least according to claim 1 is characterized in that, the raw material of described biaxially oriented polyester film is a PETG.
6. according to the biaxially oriented polyester film of any one described single-face matt at least of claim 1-5, it is characterized in that described polyester film contains three-layer co-extruded structure, comprise an intermediate layer B layer, a matt surface A layer, a surface C layer.
7. the biaxially oriented polyester film of single-face matt at least according to claim 6 is characterized in that, the surface C layer is a kind of in matt layer, common layer or the highlighted layer.
8. the biaxially oriented polyester film of single-face matt at least according to claim 6, it is characterized in that, add additive in the matt surface A layer, the additive of A layer can be organic additive or inorganic additive, can be selected from one or more of calcium carbonate, silica, talcum, magnesium carbonate, brium carbonate, calcium phosphate, aluminium oxide, titanium dioxide, carbon black, kaolin, crosslinked polystyrene particle, cross linked acrylic particle.
9. the biaxially oriented polyester film of single-face matt at least according to claim 6 is characterized in that, described surface C layer adds different additives, and described additive can be a stabilizing agent, antistatic additive, lubricant, antioxidant, colouring agent, UV absorbers, antiblocking agent.
10. the biaxially oriented polyester film of single-face matt at least according to claim 6, it is characterized in that, can contain additive in the middle of described in the B layer or reclaim section, described additive can be a stabilizing agent, antistatic additive, lubricant, antioxidant, colouring agent, UV absorbers, antiblocking agent.
11. the biaxially oriented polyester film of single-face matt at least according to claim 6 is characterized in that, contains the additive of percentage by weight 1.0-10% in the matt surface A layer.
12. the biaxially oriented polyester film of single-face matt at least according to claim 11 is characterized in that, contains the additive of percentage by weight 1.5-9.0% in the matt surface A layer.
13. the biaxially oriented polyester film of single-face matt at least according to claim 12 is characterized in that, contains the additive of percentage by weight 2.0-8.0% in the matt surface A layer.
14. the biaxially oriented polyester film of single-face matt at least according to claim 6 is characterized in that, the average grain diameter of additive is 0.01-8.0 μ m among the matt surface layer A.
15. the biaxially oriented polyester film of single-face matt at least according to claim 14 is characterized in that, the average grain diameter of additive is 0.02-7.5 μ m among the matt surface layer A.
16. the biaxially oriented polyester film of single-face matt at least according to claim 15 is characterized in that, the average grain diameter of additive is 0.04-5.0 μ m among the matt surface layer A.
17. the method for the biaxially oriented polyester film of the described single-face matt at least of production claim 1 comprises and extrudes, casts sheet, stretching, thermal finalization, lax, traction, rolling step, it is characterized in that this method comprises:
(1) prepare three-decker at least polyester raw material, each layer extruded respectively; And,
(2) to the melt of coextruded structure casting sheet, stretching, thermal finalization, lax, traction, rolling.
18. the production method of the biaxially oriented polyester film of single-face matt at least according to claim 17 is characterized in that, this method comprises:
(1) polyester raw material of the three-decker of B layer, surfaces A layer and C layer in the middle of preparation comprises, each layer extruded respectively; And,
(2) to the melt of coextruded structure casting sheet, stretching, thermal finalization, lax, traction, rolling.
19. the biaxially oriented polyester film of single-face matt at least according to claim 18 is characterized in that, the polymer of middle B layer, surfaces A layer and C layer is extruded through three screw extruders respectively, and extruder is selected from single screw extrusion machine or double screw extruder.
20. the biaxially oriented polyester film of single-face matt at least according to claim 18 is characterized in that, the employing that stretches is a cross directional stretch behind the first longitudinal stretching, and vertical La Wendu is 75-120 ℃, and horizontal La Wendu is 85-140 ℃.
21. the biaxially oriented polyester film of single-face matt at least according to claim 18 is characterized in that, the temperature of thermal finalization is controlled at 150-250 ℃, and heat-setting time is 0.1-10 second.
22. the biaxially oriented polyester film of single-face matt at least according to claim 18 is characterized in that, behind longitudinal stretching the film single or double is carried out sided corona treatment and chemical treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410016500 CN1660568A (en) | 2004-02-24 | 2004-02-24 | Sub-smooth type polyester film at least in single side and fabricating method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410016500 CN1660568A (en) | 2004-02-24 | 2004-02-24 | Sub-smooth type polyester film at least in single side and fabricating method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1660568A true CN1660568A (en) | 2005-08-31 |
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ID=35010268
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410016500 Pending CN1660568A (en) | 2004-02-24 | 2004-02-24 | Sub-smooth type polyester film at least in single side and fabricating method |
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| CN (1) | CN1660568A (en) |
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