CN104809963B - A kind of semi-transparent polyester film - Google Patents
A kind of semi-transparent polyester film Download PDFInfo
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- CN104809963B CN104809963B CN201510250319.4A CN201510250319A CN104809963B CN 104809963 B CN104809963 B CN 104809963B CN 201510250319 A CN201510250319 A CN 201510250319A CN 104809963 B CN104809963 B CN 104809963B
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- polyester film
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- polyethylene terephthalate
- transparent polyester
- terephthalate matrix
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Abstract
The invention discloses a kind of semi-transparent polyester film, formed through biaxial tension and thermal finalization by top layer polyethylene terephthalate matrix and intermediate layer polyethylene terephthalate matrix, the top layer polyethylene terephthalate matrix includes upper epidermis and layer, the upper surface of the top layer polyethylene terephthalate matrix or/and lower surface contain the light diffusing agent that mass percent is 0.1-3%, the intermediate layer polyethylene terephthalate matrix contains the thermoplasticity incompatible resin that the inorganic particulate that mass percent is 0.5 8% or organic silicon particle and mass percent are for 0.3-15%.White semi-transparent polyester film of the invention, its translucency is between transparent polyester film and white polyester film and with excellent light diffusion effect, its translucency and light diffusing needed for simultaneously meeting advertising lamp box.
Description
Technical field
The present invention relates to a kind of polyester film, more particularly, to a kind of low density white semi-transparent polyester film.
Background technology
White polyester film is widely used in packing business and advertising.And advertising lamp box is applied to, particularly subway is wide
The polyester film for accusing lamp box must be a kind of polyester film of white semi-transparent, and it not only has the effect of masking protective layer, and
And the ad content that can be beautifully printed on polyester film.
The polyester film that current subway advertising lamp-box is used is in semi-transparent poly- of transparent polyester film or conventional white
Coated with multiple layer Chinese white reaches semi-transparent light effect on ester film.Typically TiO2 is mixed into acrylic resin, while
Some auxiliary agents are added, then by methods such as coating, drying, TiO2 and aid particle is coated onto transparent polyester film or conventional white
On the semi-transparent polyester film of color.The technique falls behind, and there are problems that a lot, and such as product color, light transmittance be uneven, intolerant to old
Change (acrylic resin is easily aging by sunshine, and jaundice discoloration is not wear-resisting)；Acrylic resin coating is easy to fall off, is especially being scraped
Rub or become apparent from when colliding, often result in and be damaged position printing opacity；Image or ad content must be regurgitated (in the spray of film reverse side
Draw), easy aging, easy light leak is easily scratched.Chinese white can be reduced using conventional white semi-transparent polyester film as base material
Coated weight and number of times, but due to conventional white semi-transparent polyester film ensure light transmittance index while its light diffusion effect not
It is good, it is still necessary to treatment is coated to it, operation and cost is not only increased, also due to the use of organic solvent and environment is made
Into harmful effect.
Therefore it is a kind of simultaneously to meet the white semi-transparent polyester film of translucency and light diffusing needed for advertising lamp box
Exploitation is necessary.
The content of the invention
Goal of the invention：The technical problems to be solved by the invention are to provide one kind can be while meet printing opacity needed for advertising lamp box
Property and light diffusing white semi-transparent polyester film, it is three-layer co-extruded again by two-way that the semi-transparent polyester film first passes through ABA
Stretching is obtained, and film forming stable and uniform will not cause the change of light transmittance because of abrasion, in addition, contain light diffusing agent on film,
Make the light homogeneous soft for transmiting.
Technical scheme：In order to solve the above technical problems, the technical solution adopted in the present invention is：
By top layer polyethylene terephthalate matrix and intermediate layer polyethylene terephthalate matrix through two-way
Stretch and thermal finalization is formed, the top layer polyethylene terephthalate matrix includes upper epidermis and layer, the top layer
The upper surface of polyethylene terephthalate matrix or/and lower surface contain the light diffusing agent that mass percent is 0.1-3%,
The intermediate layer polyethylene terephthalate matrix contains the inorganic particulate or organic silicon grain that mass percent is 0.5-8%
Son and mass percent are 0.3-15% thermoplasticity incompatible resin.
Wherein, the light diffusing agent is for any one in silica or glass microballoon or silicone resin powder or appoints
Several mixing in any proportion of meaning.
Wherein, the inorganic particulate is any one in titanium dioxide, barium sulfate, zinc oxide or calcium carbonate or any several
Plant mixing in any proportion.
Wherein, auxiliary agent is also included in the intermediate layer polyethylene terephthalate matrix, the auxiliary agent includes brightening
Agent, heat-resisting stabilizing agent, antioxidative stabilizer, ultra-violet absorber and ultra-violet stabilizer, semi-transparent polyester film of the present invention is also
Other additives for not damaging effect of the present invention, including brightening agent, heat-resisting stabilizing agent, anti-oxidant stabilization can as needed be added
Agent, ultra-violet absorber and ultra-violet stabilizer etc..
Wherein, the thermoplasticity incompatible resin is crystalline thermoplastic resin, and its repeat unit is ethene, propylene, 1-
Butylene or polymethyl.
Wherein, the thermoplasticity incompatible resin is the polystyrene or the copolymer of cyclic olefin in amorphous resin
Or homopolymers, wherein, the copolymer of the cyclic olefin in cycloolefin, bicyclic alkene, tricyclene hydrocarbon or four cycloolefins extremely
A kind of few copolymer formed with ethene or propylene.
Wherein, also doped with dispersant in the intermediate layer polyethylene terephthalate matrix, the dispersant is
Containing carboxyl or epoxy radicals polar group, or there is the olefin polymer of the functional group of reactivity with polyethylene terephthalate
Or copolymer, or surfactant or adhesive resin.
Wherein, the dispersant for diethylene glycol (DEG), PAG or the polyester containing M-phthalic acid Third monomer it is common
Polymers.
Wherein, the inorganic particulate is barium sulfate, and the particle diameter of the barium sulfate is 0.5-5um, and barium sulfate particles can be
Stably disperse in polyester polymers, film forming is good, and good reflectivity performance can be reached and color is whiter thinner
Greasy, the addition of inorganic particulate is 0.5-8%, preferably 3-5%.
Wherein, the glass transition temperature of the incompatible resin be 70 DEG C~170 DEG C, preferably 90 DEG C -150 DEG C, only by heat
The glass transition temperature Tg controls of plasticity incompatible resin just can guarantee that the translucency of film has to a certain degree in 70 DEG C~170 DEG C
Decline, but the light diffusing of film is greatly improved, and the too low thermoplasticity incompatible resin of glass transition temperature expands light
The raising for dissipating property is undesirable, and the too high thermoplasticity incompatible resin of glass transition temperature then easily causes the excessive decline of translucency.
Wherein, the thickness of the polyester film is 75-250um, preferably 100~188um, when polyester film thickness is less than
The light diffusion effect of film can step-down and rigidity deficiency, the light transmittance of film when polyester film thickness is thicker than 250um during 75um
Cost of manufacture is reduced and improves, economy is not good.
Wherein, the light transmittance of the polyester film is less than 40% preferably smaller than 35%, and more preferably range of transmittance is
20%~35%.
Wherein, the particle diameter of the light diffusing agent be 1-10um, preferably 3-7um because the light diffusing agent on top layer except
Outside light diffusion effect, more need to ensure that film surface has certain roughness to prevent film to be easy to bond, top layer light diffusing agent matter
Amount percentage is 0.1-3%, preferably 0.1-2%.
Beneficial benefit：Compared to prior art, white semi-transparent polyester film of the invention, its translucency is between transparent poly-
Between ester film and white polyester film and with excellent light diffusion effect, semi-transparent polyester film of the present invention can meet simultaneously
Translucency and light diffusing needed for advertising lamp box, it is three-layer co-extruded again by two-way drawing that the semi-transparent polyester film first passes through ABA
Stretch prepared, film forming stable and uniform will not cause the change of light transmittance because of abrasion, in addition, containing light diffusing agent on film, make
The light homogeneous soft for transmiting, therefore white semi-transparent polyester film of the present invention is while light transmittance index is ensured, light diffusion
Effect is also fine, transmitted light homogeneous soft, and ageing-resistant, wear-resistant, is difficult light leak, is not easy to be scratched, and its positive and negative is equal
Sprayable advertisement.
Specific embodiment
With reference to specific embodiment, the present invention is furture elucidated, it should be understood that these embodiments are merely to illustrate the present invention
Rather than limitation the scope of the present invention, after the present invention has been read, those skilled in the art are to various equivalences of the invention
The modification of form falls within the application appended claims limited range.
Semi-transparent polyester film of the invention, its light transmittance is between transparent polyester film and white polyester film and has
The density for having excellent light diffusion effect, semi-transparent polyester film of the present invention is less than existing white semi-transparent polyester film density
10%-30%, the visible light transmittance rate of the polyester film is less than 40%, preferably smaller than 35%, and more preferably range of transmittance is
20%~35%, the thickness of the polyester film is 75-250um, preferably 100~188um, when polyester film thickness is thinner than 75um
The light diffusion effect of film can step-down and rigidity is not enough, when polyester film thickness is thicker than 250um the light transmittance reduction of film and
Cost of manufacture is improve, economy is not good.
Semi-transparent polyester film of the invention, by top layer polyethylene terephthalate matrix and middle strata to benzene two
Formic acid glycol ester matrix is after extruder is coextruded, then stretched and thermal finalization is formed, top layer poly terephthalic acid second
Terephthalate matrix includes upper epidermis polyethylene terephthalate matrix and layer polyethylene terephthalate matrix,
The upper surface of top layer polyethylene terephthalate matrix or/and lower surface contain the light that mass percent is 0.1-3% and expand
Powder, the preferred 0.1-2% of light diffusing agent mass percent, light diffusing agent is silica or glass microballoon or organic siliconresin powder
Any one in end or any several mixing in any proportion, the particle diameter of light diffusing agent is 1-10um, the preferred 3- of particle diameter
7um, because the light diffusing agent of top layer polyethylene terephthalate matrix needs to protect in addition to playing light diffusion effect, more
Card film surface has certain roughness to prevent film to be easy to bond, and intermediate layer polyethylene terephthalate matrix contains
Mass percent is the incompatible resin of 0.3-15% for the inorganic particulate or organic silicon particle and mass percent of 0.5-8%,
Inorganic particulate is any one or any several in any proportion mixed in titanium dioxide, barium sulfate, zinc oxide or calcium carbonate
Close, inorganic particulate preferably barium sulfate, barium sulfate can stably disperse in polyester polymers, film forming is good, and can
Reach good reflectivity performance and color is whiter finer and smoother, the particle diameter of barium sulfate is 0.5-5um, the quality percentage of inorganic particulate
It is 0.5-8%, preferably 3-5% than (addition)；
The incompatible resin added in polyethylene terephthalate matrix in intermediate layer of the present invention can be crystallinity heat
Plastic resin or amorphism thermoplastic resin, when incompatible resin is crystalline resin, its repeat unit can select ethene, third
Alkene, 1- butylene or polymethylpentene etc., crystalline resin polymer can be homopolymers, or copolymer, also may be used in addition
Used with by composition or different various crystalline resin mixed with polymers such as melt viscosity, or with other olefine kind resins
Or other resins are shared, when incompatible resin is amorphous resin, polystyrene or cyclic olefin copolymer resin can be selected
Deng amorphous resin polymer can be homopolymers, or copolymer, cyclic olefin copolymer can be by cycloolefin,
What the linear alkenes such as at least one cyclic olefin and ethene, propylene in bicyclic alkene, tricyclene hydrocarbon and four cycloolefins were formed is total to
Polymers, appropriate incompatible resin is added by the polyethylene terephthalate matrix of intermediate layer, can significantly be dropped
The density of low film simultaneously improves its light diffusing, improves economy, and the addition of incompatible resin is 0.3-15% mass ratioes, excellent
Select 3-8% mass ratioes；
The glass transition temperature Tg of the incompatible resin added in polyethylene terephthalate matrix in intermediate layer of the present invention
It is 70 DEG C~170 DEG C, preferably 90 DEG C~150 DEG C, only controls at 70 DEG C the glass transition temperature Tg of thermoplasticity incompatible resin
The translucency of film is just can guarantee that in~170 DEG C a certain degree of decline, but the light diffusing of film is greatly improved,
Raising of the too low thermoplasticity incompatible resin of glass transition temperature to light diffusing is undesirable, and the too high thermoplastic of glass transition temperature
Property incompatible resin then easily causes the excessive decline of translucency；
In addition, the present invention in order that thermoplasticity incompatible resin be more imperceptibly dispersed in it is poly- to the Yue of benzene two acid second diester matrixes
In, dispersant is preferably added further to reduce thermoplasticity incompatible resin being uniformly dispersed in the poly- acid second diester to the Yue of benzene two
Degree so that the flat bubble produced in stretching is finer, can finally improve the translucency and light diffusion effect of film, dispersant
Species is not particularly limited, it is possible to use possess carboxyl or epoxy radicals isopolarity group or with can be with poly- to the Yue of benzene two acid second
The olefin polymer or copolymer, diethylene glycol (DEG), PAG, surfactant and heat bonding of the functional group of diester reaction
Property resin etc., inventive dispersant preferably comprises the polyester copolymer of M-phthalic acid Third monomer, when dispersant addition is used
Can be used alone, it is also possible to share two or more, the addition of dispersant is not particularly limited, preferred mass percentage is
0.1-10%, more preferably mass percent be 0.5-3%, when dispersant is too low, thermoplasticity incompatible resin be easily caused by
In the dispersion not enough uniformly inadequate miniaturization of cavity in stretching, the translucency of film is set not reach requirement, dispersant mistake
Translucency that is big then can causing film excessively declines.
In addition, semi-transparent polyester film of the present invention can also as needed add other additions for not damaging effect of the present invention
Agent, including brightening agent, heat-resisting stabilizing agent, antioxidative stabilizer, ultra-violet absorber and ultra-violet stabilizer etc., the additive adds
In entering polyethylene terephthalate matrix in intermediate layer of the present invention.
Stretching condition all same in all examples below：Longitudinal stretching ratio is 3.1, and cross directional stretch ratio is 3.5, thermal finalization
Temperature is 210 degree.
Comparative example
A kind of semi-transparent polyester film, by top layer polyethylene terephthalate matrix and intermediate layer poly terephthalic acid
Glycol ester matrix constitute, wherein, top layer polyethylene terephthalate matrix by 25% (mass percent) master batch film
Grade polyester chip (Yizheng Fiber Optical plant FG610) and 75% fiber polyester chip (Yizheng Fiber Optical plant SB500) are constituted, and middle strata is to benzene
Naphthalate matrix is by 2.5% polyester slice (titanium dioxide quality is 60% than content in the polyester slice) (Shanghai
Join happy MB06) plus 97.5% fiber polyester chip (Yizheng Fiber Optical plant SB500) composition, by top layer polyethylene terephthalate
Low density white is obtained after matrix and intermediate layer polyethylene terephthalate matrix biaxial tension and thermal finalization semi-transparent poly-
Ester film, its performance is shown in Table 1.
Embodiment 1
A kind of semi-transparent polyester film, by top layer polyethylene terephthalate matrix and intermediate layer poly terephthalic acid
Glycol ester matrix is constituted, wherein, top layer polyethylene terephthalate matrix is by 25% film grade polyester chip (Yizheng Fiber Optical plant
FG610 75% fiber polyester chip (content of light diffusing agent is 3% in the polyester slice) (Yizheng Fiber Optical plant SB500) group) is added
Into, intermediate layer polyethylene terephthalate matrix by 3%PP, 1.5% polyester slice (titanium dioxide matter in the polyester slice
Amount is that 60%) (Shanghai joins happy MB06) and 95.5% fiber polyester chip (Yizheng Fiber Optical plant SB500) are constituted than content, by top layer
After polyethylene terephthalate matrix and intermediate layer polyethylene terephthalate matrix biaxial tension and thermal finalization
To low density white semi-transparent polyester film, its performance is shown in Table 1.
Embodiment 2
A kind of semi-transparent polyester film, by top layer polyethylene terephthalate matrix and intermediate layer poly terephthalic acid
Glycol ester matrix is constituted, wherein, top layer polyethylene terephthalate matrix is by 2% organic siliconresin (Changxing DF50A0)
With 98% fiber polyester chip (Yizheng Fiber Optical plant SB500) composition, intermediate layer polyethylene terephthalate matrix is by 3%
PP, 4% polyester slice (barium sulfate quality is than content 65% in the polyester slice) (Shanghai joins happy MB41) and 93% fibre-grade are poly-
Ester section (Yizheng Fiber Optical plant SB500) composition, by top layer polyethylene terephthalate matrix and intermediate layer poly terephthalic acid
Low density white semi-transparent polyester film is obtained after the biaxial tension of glycol ester matrix and thermal finalization, its performance is shown in Table 1.
Embodiment 3
A kind of semi-transparent polyester film, by top layer polyethylene terephthalate matrix and intermediate layer poly terephthalic acid
Glycol ester matrix is constituted, wherein, top layer polyethylene terephthalate matrix is by 2% organic siliconresin (Changxing DF50A0)
With 98% fiber polyester chip (Yizheng Fiber Optical plant SB500) composition, intermediate layer polyethylene terephthalate matrix is by 3%
PP, 1% organic siliconresin (Changxing DF50A0) and 96% fiber polyester chip (Yizheng Fiber Optical plant SB500) composition, top layer is gathered
Obtained after ethylene glycol terephthalate matrix and intermediate layer polyethylene terephthalate matrix biaxial tension and thermal finalization
Low density white semi-transparent polyester film, its performance is shown in Table 1.
Embodiment 4
A kind of semi-transparent polyester film, by top layer polyethylene terephthalate matrix and intermediate layer poly terephthalic acid
Glycol ester matrix is constituted, wherein, top layer polyethylene terephthalate matrix is by 25% film grade polyester chip (Yizheng Fiber Optical plant
FG610 75% fiber polyester chip (Yizheng Fiber Optical plant SB500) composition, intermediate layer polyethylene terephthalate matrix) are added
It is poly- by 3%PP, 4% polyester slice (barium sulfate quality is than content 65% in the polyester slice) (Shanghai joins happy MB41), 5% film level
Ester is cut into slices (Yizheng Fiber Optical plant FG640) and 88% fiber polyester chip (Yizheng Fiber Optical plant SB500) composition, by the poly- terephthaldehyde in top layer
It is white low-density to be obtained after sour glycol ester matrix and intermediate layer polyethylene terephthalate matrix biaxial tension and thermal finalization
Color semi-transparent polyester film, its performance is shown in Table 1.
Embodiment 5
A kind of semi-transparent polyester film, by top layer polyethylene terephthalate matrix and intermediate layer poly terephthalic acid
Glycol ester matrix is constituted, wherein, top layer polyethylene terephthalate matrix is by 25% film grade polyester chip (Yizheng Fiber Optical plant
FG610 75% fiber polyester chip (Yizheng Fiber Optical plant SB500) composition, intermediate layer polyethylene terephthalate matrix) are added
By 1% polymethylpentene (TPX), 4% polyester slice (barium sulfate quality is than content 65% in the polyester slice) (Shanghai connection pleasure
MB41), 5% film grade polyester chip (Yizheng Fiber Optical plant FG640) and 90% fiber polyester chip (Yizheng Fiber Optical plant SB500) are constituted,
By top layer polyethylene terephthalate matrix and intermediate layer polyethylene terephthalate matrix biaxial tension, simultaneously heat is fixed
Low density white semi-transparent polyester film is obtained after type, its performance is shown in Table 1.
Table 1 is the performance indications table that comparative example obtains product with embodiment 1~5：
Table 1：
| Thickness um | Density light transmittance % | Mist degree % | |
| Comparative example | 125um | 1.40 37.2% | 92.4% |
| Embodiment 1 | 125um | 1.12 38.4% | 92.8% |
| Embodiment 2 | 125um | 1.21 36.0% | 92.2% |
| Embodiment 3 | 125um | 1.08 39.2% | 93.6% |
| Embodiment 4 | 125um | 1.21 38.3% | 93.7% |
| Embodiment 5 | 125um | 1.30 37.1% | 94.2% |
Claims (10)
1. a kind of semi-transparent polyester film, it is characterised in that：By top layer polyethylene terephthalate matrix and middle strata
Ethylene glycol terephthalate matrix is formed through biaxial tension and thermal finalization, the top layer polyethylene terephthalate matrix
Including upper epidermis and layer, the upper surface of the top layer polyethylene terephthalate matrix or/and lower surface contain matter
Amount percentage is 0.1~3% light diffusing agent, and the intermediate layer polyethylene terephthalate matrix contains mass percent
It is 0.5~8% inorganic particulate or organic silicon particle and thermoplasticity incompatible resin that mass percent is 0.3~15%；Institute
State in the polyethylene terephthalate matrix of intermediate layer also doped with dispersant.
2. semi-transparent polyester film according to claim 1, it is characterised in that：The light diffusing agent is silica or glass
Any one in glass microballon or silicone resin powder or any several mixing in any proportion.
3. semi-transparent polyester film according to claim 1, it is characterised in that：The inorganic particulate is titanium dioxide, sulphur
Any one in sour barium, zinc oxide or calcium carbonate or any several mixing in any proportion.
4. semi-transparent polyester film according to claim 1, it is characterised in that：The intermediate layer also includes auxiliary agent, described
Auxiliary agent includes brightening agent, heat-resisting stabilizing agent, antioxidative stabilizer, ultra-violet absorber and ultra-violet stabilizer.
5. semi-transparent polyester film according to claim 1, it is characterised in that：The thermoplasticity incompatible resin is crystallization
Property thermoplastic resin, its repeat unit be ethene, propylene, 1- butylene or polymethyl.
6. semi-transparent polyester film according to claim 1, it is characterised in that：The thermoplasticity incompatible resin is non-
The copolymer or homopolymers of polystyrene or cyclic olefin in crystalline substance resin, wherein, the copolymer of the cyclic olefin is ring
The copolymer that at least one and ethene or propylene in alkene, bicyclic alkene, tricyclene hydrocarbon or four cycloolefins are formed.
7. semi-transparent polyester film according to claim 1, it is characterised in that：The dispersant is containing carboxyl or epoxy radicals
Polar group, or have the olefin polymer or copolymer of the functional group of reactivity, or table with polyethylene terephthalate
Face activating agent or adhesive resin.
8. semi-transparent polyester film according to claim 7, it is characterised in that：The dispersant is diethylene glycol (DEG), poly- alkylene
Base glycol or the polyester copolymer containing M-phthalic acid Third monomer.
9. semi-transparent polyester film according to claim 3, it is characterised in that：The inorganic particulate is barium sulfate, described
The particle diameter of barium sulfate is 0.5~5um.
10. semi-transparent polyester film according to claim 1, it is characterised in that：The glass of the thermoplasticity incompatible resin
Glass temperature is 70 DEG C~170 DEG C.
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| CN107933026A (en) * | 2017-11-07 | 2018-04-20 | 云梦县德邦实业有限责任公司 | A kind of PET whites anti-ageing film and its application |
| CN109161039B (en) * | 2018-08-16 | 2021-09-21 | 王泉泉 | High-light-transmittance and adjustable-refractive-index polyester film prepared from organic barium carboxylate and preparation method thereof |
| CN111873584A (en) * | 2020-08-04 | 2020-11-03 | 佛山杜邦鸿基薄膜有限公司 | High-brightness white semi-transparent polyester film and production method thereof |
| CN114290782A (en) * | 2022-01-13 | 2022-04-08 | 广东德冠包装材料有限公司 | Biaxially oriented polypropylene film for epoxy resin curing and preparation method thereof |
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| US6472081B1 (en) * | 1994-09-26 | 2002-10-29 | Exxonmobil Oil Corporation | Semi-transparent high barrier film |
| CN101845202A (en) * | 2010-04-14 | 2010-09-29 | 佛山杜邦鸿基薄膜有限公司 | White semi-transparent polyester film and production method thereof |
| CN203393083U (en) * | 2013-06-03 | 2014-01-15 | 佛山市毅科塑胶制造有限公司 | Colored heat-mounted film |
| CN103753920A (en) * | 2013-12-27 | 2014-04-30 | 四川东方绝缘材料股份有限公司 | Multilayered co-extruded bidirectional-stretching light reflection polyester thin film and manufacturing method thereof |
| CN104530300A (en) * | 2014-10-25 | 2015-04-22 | 重庆市旭星化工有限公司 | Synthesis method of biaxially orientated polyester film |
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- 2015-05-15 CN CN201510250319.4A patent/CN104809963B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6472081B1 (en) * | 1994-09-26 | 2002-10-29 | Exxonmobil Oil Corporation | Semi-transparent high barrier film |
| CN101845202A (en) * | 2010-04-14 | 2010-09-29 | 佛山杜邦鸿基薄膜有限公司 | White semi-transparent polyester film and production method thereof |
| CN203393083U (en) * | 2013-06-03 | 2014-01-15 | 佛山市毅科塑胶制造有限公司 | Colored heat-mounted film |
| CN103753920A (en) * | 2013-12-27 | 2014-04-30 | 四川东方绝缘材料股份有限公司 | Multilayered co-extruded bidirectional-stretching light reflection polyester thin film and manufacturing method thereof |
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Effective date of registration: 20210225 Address after: 242099 southeast corner of the intersection of Chunhua road and Jisheng Road, Feicai office, Xuancheng City, Anhui Province Patentee after: Anhui Si Rui Meng New Material Co.,Ltd. Address before: No.68 Shengtai Road, Jiangning Development Zone, Nanjing, Jiangsu 210000 Patentee before: NANJING EVERPOLY NEW MATERIAL TECHNOLOGY JOINT STOCK Co.,Ltd. |