CN106671544A - Preparation method of low-thermal-shrinkage polyester polyester reflective film - Google Patents
Preparation method of low-thermal-shrinkage polyester polyester reflective film Download PDFInfo
- Publication number
- CN106671544A CN106671544A CN201510755293.9A CN201510755293A CN106671544A CN 106671544 A CN106671544 A CN 106671544A CN 201510755293 A CN201510755293 A CN 201510755293A CN 106671544 A CN106671544 A CN 106671544A
- Authority
- CN
- China
- Prior art keywords
- reflective film
- polyester
- preparation
- temperature
- polyester reflective
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/08—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the cooling method
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
- B32B37/15—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer being manufactured and immediately laminated before reaching its stable state, e.g. in which a layer is extruded and laminated while in semi-molten state
- B32B37/153—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer being manufactured and immediately laminated before reaching its stable state, e.g. in which a layer is extruded and laminated while in semi-molten state at least one layer is extruded and immediately laminated while in semi-molten state
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/0036—Heat treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/12—Deep-drawing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/03—3 layers
Abstract
The invention relates to an optical reflective film, especially to a preparation method of a low-thermal-shrinkage polyester polyester reflective film. In order to reduce thermal shrinkage of existing polyester reflective films, the invention provides a preparation method of a low-thermal-shrinkage polyester polyester reflective film. The polyester reflective film has an ABA three-layer co-extrusion structure. The B layer of the polyester reflective film has a foam structure therein. The preparation method comprises the following steps: (1) mixing raw materials for preparation of the polyester reflective film, melting and plasticizing, extruding by a three-layer co-extrusion process, and cooling a casting strip; longitudinally stretching the obtained casting strip and then transversely stretching; (2) carrying out heat-setting on the film obtained in the step (1) at the heat-setting temperature of 220-240 DEG C; and cooling and then carrying out heat treatment at the heat treatment temperature of 60-120 DEG C. The reflective film provided by the invention has low thermal shrinkage, excellent reflectivity and high stiffness.
Description
Technical field
The present invention relates to a kind of optical reflectance coating, more particularly to a kind of preparation of low heat shrinkage polyester reflective film
Method.
Background technology
In recent years, as the display device of PC, TV, mobile phone etc., liquid crystal has been used in a large number
Display screen.These LCDs (LCD) are carried by being referred to as the area source of backlight in inner side setting
For irradiation light, so as to be shown.Backlight is mainly made up of light source, light guide plate and all kinds of blooming pieces,
With brightness is high, life-span length and it is luminous uniform the characteristics of.Wherein reflectance coating is light critically important in optics module
Film is learned, its effect is exactly by the light high efficiency for spilling light guide plate bottom and loss-free reflection, so as to reduce
Light loss, reducing energy consumption.Because reflectance coating is close to light guide plate, especially undersized reflectance coating is needed by glue
Band is pasted below light guide plate.In addition, the LED lamp bar in backlight can be in reflectance coating side, localized hyperthermia
Reflectance coating thermal contraction can be caused, so as to affect the taste of backlight module, therefore the preparation of low thermal shrinkage reflectance coating
It is highly important problem.
The content of the invention
In order to reduce the percent thermal shrinkage of existing polyester reflective film, it is anti-that the present invention provides a kind of low heat shrinkage polyester
Penetrate the preparation method and a kind of backlight module of film.The present invention provide reflectance coating have very low percent thermal shrinkage,
Outstanding reflectivity and higher deflection.
In order to solve above-mentioned technical problem, the present invention provides following technical proposals：
The present invention provides a kind of preparation method of low heat shrinkage polyester reflective film, and the polyester reflective film has
The three-layer co-extruded structures of ABA, have foam structure in the B layers of the polyester reflective film, the preparation method includes
Following steps：
(1) raw material for preparing polyester reflective film is mixed, fusion plastification is extruded using three-layer co-extruded technique,
Cooling slab；Slab to obtaining carries out longitudinal stretching, cross directional stretch；
(2) film that step (1) is obtained is carried out into thermal finalization, heat setting temperature is 220-240 DEG C；Cooling
It is heat-treated again afterwards, heat treatment temperature is 60-120 DEG C.
Further, in the preparation method of described low heat shrinkage polyester reflective film, in step (2),
Heat setting temperature is 220-240 DEG C, and the time is 2-10s；It is heat-treated again after cooling, heat treatment temperature is
60-120 DEG C, the time is 20-60s.
Further, in the preparation method of described low heat shrinkage polyester reflective film, in step (2),
The heat treatment temperature is 80-100 DEG C, and the time is 40-50s.
Further, in the preparation method of described low heat shrinkage polyester reflective film, in step (1),
The temperature of fusion plastification is 260-280 DEG C, and the temperature of cooling is 20-30 DEG C, and the thickness of gained slab is
300-4000μm。
Cooled down using pole chilling roller, the temperature of pole chilling roller is 20-30 DEG C.
Further, in the preparation method of described low heat shrinkage polyester reflective film, in step (1),
Longitudinal drawing temperature is 80-95 DEG C, and transverse drawing temperature is 100-125 DEG C.
Further, in the preparation method of described low heat shrinkage polyester reflective film, in step (1),
Longitudinal stretching ratio is 3.5-4.2, and longitudinal drawing temperature is 80-95 DEG C；Cross directional stretch ratio is 3.5-4.2, is laterally drawn
Temperature is stretched for 100-125 DEG C.
Further, in the preparation method of described low heat shrinkage polyester reflective film, in step (1),
Longitudinal stretching ratio is 3.8-4.0, and longitudinal drawing temperature is 82-85 DEG C；Cross directional stretch ratio is 3.8-4.0, is laterally drawn
Temperature is stretched for 110-105 DEG C.
Further, in the preparation method of described low heat shrinkage polyester reflective film, the polyester reflective
In film, the raw material of A layers includes following components：The polyester resin of 80-95%, the inorganic particulate of 5-20%；B layers
Raw material include following components：60-76% polyester resin, 5-20% inorganic particulates, 10-15% incompatible resins,
2-5% toughened resins, 2-5% tackifying resins；The percentage is weight percentage.
Further, the preparation method is comprised the following steps：
(1) reflection polyester functional agglomerate is prepared：By inorganic particulate, incompatible resin, toughened resin and thickening
Resin prepares reflection polyester functional agglomerate with polyester resin as carrier；
(2) slab：Using three-layer co-extruded technique；For B layers, polyester resin and step (1) are obtained
Reflection polyester functional agglomerate mix by proportioning, will reflection polyester functional agglomerate and polyester slice fusion plastification,
After tri- layers of clothes hanger type slit die heads of ABA, it is cast to after the chilling roller of pole and is quickly cooled to polyester fiberglass temperature
Slab is formed below；
(3) slab of glassy state is first used into longitudinal stretching machine longitudinal stretching, is then laterally drawn with widening machine
Stretch；
(4) film that step (3) is obtained is carried out into thermal finalization, heat setting temperature is 220-240 DEG C；Cooling
It is heat-treated again afterwards, heat treatment temperature is 60-120 DEG C.
The present invention also provides a kind of backlight module, and the backlight module includes low heat shrinkage of the present invention
Polyester reflective film.
The polyester reflective film is ABA three-deckers, and polyester reflective film thickness is 50-400 μm
Further, in the polyester reflective film, A thickness degree accounts for gross thickness 4-10%, and B thickness degree accounts for total thickness
Degree 80-92%.
Further, in the polyester reflective film, A thickness degree accounts for gross thickness 5%, and B thickness degree accounts for gross thickness
90%.
Above-mentioned polyester reflective film is referred to as reflectance coating.
Further, described polyester resin is selected from polyethylene terephthalate, poly terephthalic acid fourth
One kind in diol ester, PEN.Further, polyester resin is preferably PET.It is poly-
Ester resin adopts film level polester cut sheet (abbreviation cut film).Further, the characteristic of the polyester resin
Viscosity is 0.68-0.80dL/g.
Further, described inorganic particulate is selected from calcium carbonate, zinc oxide, barium sulfate, rutile-type dioxy
Change titanium, anatase thpe white powder, aluminum oxide, mica, one or two in kaolin, the inorganic particulate
Particle diameter be 0.1-2.0 μm.Further, described inorganic particulate is preferably barium sulfate, rutile-type dioxy
Change titanium.
Further, described incompatible resin is selected from polymethylpentene, polypropylene, polybutene, cycloolefin
One kind in copolymer.Wherein, incompatible resin is preferably polyolefin.Further, incompatible resin is excellent
Elect the one kind in polymethylpentene, cyclic olefine copolymer as.
Further, described toughened resin is selected from maleic anhydride (MAH) grafted high density polyethylene
(HDPE) (percent grafting >=0.5%), MAH grafted ethene octene copolymers (POE) (percent grafting >=0.5%),
MAH graft phenylethenes-ethylene-butylene, Styrene block copolymer (SEBS) (percent grafting >=0.5%), first
Base glycidyl acrylate (GMA) grafting POE (percent grafting >=0.5%), GMA Maleated SEBSs (connect
One kind in branch rate >=0.5%).
Further, described tackifying resin is selected from unsaturated-resin, one kind of acrylic resin.Wherein,
Tackifying resin is preferably acrylic resin.
Further, polyester reflective film percent thermal shrinkage≤0.02% (85 DEG C, 30min).
Further, it is 220-280 DEG C to prepare each area's temperature of double screw extruder used by polyester functional agglomerate.
Further, the firstth area to the 9th area's temperature is respectively 220 DEG C, 225 DEG C, 240 DEG C, 250 DEG C, 260 DEG C,
270 DEG C, 280 DEG C, 270 DEG C, 265 DEG C.Engine speed is 200-800rpm, and strainer screen aperture is
20-100μm。
In published Chinese patent application (Application No.：201510022979.7, date of publication is：2015
On May 13) a kind of preparation method of reflectance coating disclosed in file, the method comprises the steps：
(1) granulate：By polyester resin, incompatible resin, inorganic particulate, toughened resin, chain extender, into
Core agent and dispersant are uniform and carry out twin-screw mixer granulation and obtain polyester functional agglomerate；Wherein, polyester
Resin 25-60%, inorganic particulate 15-67%, incompatible resin 15-30%, toughened resin 4-10%, chain extender
2-4%, nucleator 1-3% and dispersant 1-3%；
(2) slab：Using three-layer co-extruded technique；For B layers, polyester resin and step (1) are obtained
Polyester functional agglomerate by proportioning mix, carry out afterwards the three-layer co-extruded fusion plastifications of ABA, curtain coating slab；
(3) film forming is stretched：The slab that step (2) is obtained is carried out into longitudinal stretching, cross directional stretch, heat fixed
Type, winding and packaging, obtain white reflective polyester film.In stretching film formation step, longitudinal drawing temperature
For 80-95 DEG C, longitudinal stretching ratio is 2.5-3.2, and transverse drawing temperature is 100-125 DEG C, and cross directional stretch ratio is
2.8-3.2, heat setting temperature is 250-280 DEG C, and heat-setting time is 0.5-2min.
Compared with the preparation method of above-mentioned existing reflectance coating, the application's differs primarily in that：
1st, heat setting temperature, heat treatment temperature；
2nd, heat-setting time, heat treatment time；
3rd, longitudinal stretching ratio, cross directional stretch ratio.
Heat setting temperature in the application is less than published Chinese patent application (Application No.：
201510022979.7, date of publication is：On May 13rd, 2015) heat setting temperature, and have in the application
Heat treatment process, this be above-mentioned disclosed patent application preparation method in without process, in the application
Heat setting temperature of the heat treatment temperature far below disclosed patent application.
Draw ratio of the draw ratio in the application more than above-mentioned disclosed patent application.
The percent thermal shrinkage of the reflectance coating that the application is provided is the thermal contraction of the reflectance coating that disclosed patent application is provided
20% or so of rate, is greatly reduced thermal contraction phenomenon.
With being currently used in display screen compared with the reflectance coating of backlight, low heat shrinkage polyester prepared by the present invention
Reflectance coating has relatively low percent thermal shrinkage, outstanding reflectivity and higher deflection simultaneously.The polyester reflective film
It is suitable as area source reflection part.
Description of the drawings
The structural representation of low heat shrinkage polyester reflective film obtained in the preparation method that Fig. 1 is provided for the present invention.
Specific embodiment
With reference to the accompanying drawings and examples, technical scheme is further described.
As shown in figure 1, the low heat shrinkage polyester reflective film tool that the method provided using the present invention is prepared
Have in the three-layer co-extruded structures of ABA, B layers and there is foam structure 2, incompatible resin 3 is contained in B layers；A
All contain inorganic particulate 1 in layer and B layers.
The low heat shrinkage polyester reflective film that the method provided using the present invention is prepared, by the following method
Tested：
Percent thermal shrinkage：According to GB/T 13542.4-2009 standards, sample is placed on into 85 DEG C of baking ovens half little
When, determine the percent thermal shrinkage of reflectance coating.
Reflectivity：According to GB/T3979-2008 standards, using ColorQuest XE spectrophotometric color measurement instruments
(Hunterlab company systems), under D65 light conditions, by its reflectivity of d/8 ° of structured testing of integrating sphere,
Reflectivity data be 400-700nm every the reflectivity of the light wave of 10nm wavelength weighted average, weights
The energy distribution curve of correspondence D65 light sources.
Deflection：Take long 30cm, the reflectance coating of wide 1cm, at 85 DEG C, after thermal finalization 5min, by 5kg
Counterweight pushes down one end of reflectance coating, and other end hangs on the side of horizontal table top, measure film end with it is vertical
The horizontal range of desktop is deflection.The horizontal range that measurement is obtained is longer, i.e., numerical value is higher, illustrates reflection
The deflection of film is better.
Embodiment 1
The preparation method of the low heat shrinkage polyester reflective film that the present invention is provided, wherein, low heat shrinkage polyester
Reflectance coating is the three-layer co-extruded structures of ABA, and A layers proportioning is 95%PET sections, 5% silicon dioxide granule.
B layers proportioning is 76%PET sections, inherent viscosity 0.68dL/g, 10% rutile type titanium white (inorganic grain
Son), 10% polymethylpentene (incompatible resin), 2%MAH grafting HDPE (percent grafting >=0.5%) (increase
Tough resin), 2% acrylic resin (tackifying resin), the percentage is weight percentage.A thickness degree is accounted for
Gross thickness 5%, B thickness degree accounts for gross thickness 90%.Gained reflection film thickness is 188 μm.
In methods described, in drawing process：Longitudinal stretching ratio is 3.5, and longitudinal drawing temperature is 80-95 DEG C；
Cross directional stretch ratio is 3.5, and transverse drawing temperature is 100-125 DEG C.In thermal finalization and heat treatment process：Heat
Setting temperature is 220 DEG C, and the time is 2s；Heat treatment temperature is 60 DEG C, and the time is 60s.
Correlated performance is shown in Table 1.
Embodiment 2
The preparation method of the low heat shrinkage polyester reflective film that the present invention is provided, wherein, low heat shrinkage polyester
Reflectance coating is the three-layer co-extruded structures of ABA, and A layers proportioning is 95%PET sections, 5% calcium carbonate.B layers are matched somebody with somebody
Than cutting into slices for 73%PET, inherent viscosity 0.68dL/g, 10% rutile type titanium white, 12% cycloolefin are total to
Polymers, 2%MAH Maleated SEBSs (percent grafting >=0.5%), 3% unsaturated-resin, the percentage is attached most importance to
Amount percentage.A thickness degree accounts for gross thickness 5%, and B thickness degree accounts for gross thickness 90%.Gained reflects film thickness
188μm。
In methods described, in drawing process：Longitudinal stretching ratio is 4.2, and longitudinal drawing temperature is 80-95 DEG C；
Cross directional stretch ratio is 4.2, and transverse drawing temperature is 100-125 DEG C.In thermal finalization and heat treatment process：Heat
Setting temperature is 240 DEG C, and the time is 10s；Heat treatment temperature is 120 DEG C, and the time is 20s.
Correlated performance is shown in Table 1.
Embodiment 3
The preparation method of the low heat shrinkage polyester reflective film that the present invention is provided, wherein, low heat shrinkage polyester
Reflectance coating is the three-layer co-extruded structures of ABA, and A layers proportioning is 90%PET sections, 10% silicon dioxide granule.
B layers proportioning is 60%PET sections, inherent viscosity 0.68dL/g, 15% anatase titanium dioxide type titanium dioxide, 15% poly- third
Alkene, 5%MAH Maleated SEBSs (percent grafting >=0.5%), 5% acrylic resin, the percentage is weight
Percentage.A thickness degree accounts for gross thickness 5%, and B thickness degree accounts for gross thickness 90%.Gained reflects film thickness
188μm。
In methods described, in drawing process：Longitudinal stretching ratio is 3.8, and longitudinal drawing temperature is 80-95 DEG C；
Cross directional stretch ratio is 3.8, and transverse drawing temperature is 100-125 DEG C.In thermal finalization and heat treatment process：Heat
Setting temperature is 230 DEG C, and the time is 6s；Heat treatment temperature is 90 DEG C, and the time is 40s.
Correlated performance is shown in Table 1.
Embodiment 4
The preparation method of the low heat shrinkage polyester reflective film that the present invention is provided, wherein, low heat shrinkage polyester
Reflectance coating is the three-layer co-extruded structures of ABA, and A layers proportioning is 80%PET sections, 20% zinc oxide particles.B
Layer proportioning be 74%PET section, inherent viscosity 0.68dL/g, 5% calcium carbonate, 15% polymethylpentene,
3%GMA Maleated SEBSs (percent grafting >=0.5%), 3% acrylic resin, the percentage is weight percent
Than.A thickness degree accounts for gross thickness 5%, and B thickness degree accounts for gross thickness 90%.Gained reflection film thickness is 188 μm.
In methods described, in drawing process：Longitudinal stretching ratio is 4.0, and longitudinal drawing temperature is 80-95 DEG C；
Cross directional stretch ratio is 4.0, and transverse drawing temperature is 100-125 DEG C.In thermal finalization and heat treatment process：Heat
Setting temperature is 220 DEG C, and the time is 9s；Heat treatment temperature is 110 DEG C, and the time is 30s.
Correlated performance is shown in Table 1.
Embodiment 5
The preparation method of the low heat shrinkage polyester reflective film that the present invention is provided, wherein, low heat shrinkage polyester
Reflectance coating is the three-layer co-extruded structures of ABA, and A layers proportioning is 90%PET sections, 10% silicon dioxide granule.
B layers proportioning is 63%PET sections, inherent viscosity 0.68dL/g, 20% barium sulfate, 12% polybutene, 3%GMA
Grafting POE (percent grafting >=0.5%), 2% acrylic resin, the percentage is weight percentage.A layers
Thickness accounts for gross thickness 5%, and B thickness degree accounts for gross thickness 90%.Gained reflection film thickness is 188 μm.
In methods described, in drawing process：Longitudinal stretching ratio is 3.8, and longitudinal drawing temperature is 82-85 DEG C；
Cross directional stretch ratio is 4.0, and transverse drawing temperature is 100-105 DEG C.In thermal finalization and heat treatment process：Heat
Setting temperature is 230 DEG C, and the time is 5s；Heat treatment temperature is 100 DEG C, and the time is 50s.
Correlated performance is shown in Table 1.
Embodiment 6
The preparation method of the low heat shrinkage polyester reflective film that the present invention is provided, wherein, low heat shrinkage polyester
Reflectance coating is the three-layer co-extruded structures of ABA, and A layers proportioning is 80%PET sections, 20% silicon dioxide granule.
B layers proportioning be 70%PET section, inherent viscosity 0.68dL/g, 15% aluminum oxide, 10% polymethylpentene,
3%GMA Maleated SEBSs (percent grafting >=0.5%), 2% acrylic resin, the percentage is weight percent
Than.A thickness degree accounts for gross thickness 5%, and B thickness degree accounts for gross thickness 90%.Gained reflection film thickness is 188 μm.
In methods described, in drawing process：Longitudinal stretching ratio is 4.2, and longitudinal drawing temperature is 80-95 DEG C；
Cross directional stretch ratio is 3.5, and transverse drawing temperature is 100-125 DEG C.In thermal finalization and heat treatment process：Heat
Setting temperature is 240 DEG C, and the time is 3s；Heat treatment temperature is 115 DEG C, and the time is 30s.
Embodiment 7
Such as the preparation method of the low heat shrinkage polyester reflective film that embodiment 1 is provided, in methods described, drawing
During stretching：Longitudinal stretching ratio is 3.8, and longitudinal drawing temperature is 82-85 DEG C；Cross directional stretch ratio is 3.8, horizontal
It it is 100-105 DEG C to draft temperature.In thermal finalization and heat treatment process：Heat setting temperature is 220 DEG C, when
Between be 10s；Heat treatment temperature is 80 DEG C, and the time is 40s.
Embodiment 8
Such as the preparation method of the low heat shrinkage polyester reflective film that embodiment 1 is provided, in methods described, drawing
During stretching：Longitudinal stretching ratio is 4.0, and longitudinal drawing temperature is 82-85 DEG C；Cross directional stretch ratio is 4.0, horizontal
It it is 100-105 DEG C to draft temperature.In thermal finalization and heat treatment process：Heat setting temperature is 240 DEG C, when
Between be 2s；Heat treatment temperature is 90 DEG C, and the time is 45s.
Correlated performance is shown in Table 1.
Comparative example 1-6 adopts published Chinese patent application (Application No.：201510022979.7, announce
Day it is：On May 13rd, 2015) disclosed in preparation method.The performance detection of the reflectance coating in comparative example
As a result it is as shown in table 2
Comparative example 1
The reflectance coating that such as embodiment 1 is provided, in its preparation method, in drawing process：Longitudinal stretching ratio is
2.5, cross directional stretch ratio is 2.8, and heat setting temperature is 250 DEG C, and heat-setting time is 0.5min, no heat treatment
Process.
Comparative example 2
The reflectance coating that such as embodiment 2 is provided, in its preparation method, in drawing process：Longitudinal stretching ratio is
3.2, cross directional stretch ratio is 3.2, and heat setting temperature is 280 DEG C, and heat-setting time is 2min, no heat treatment
Process.
Comparative example 3
The reflectance coating that such as embodiment 3 is provided, in its preparation method, in drawing process：Longitudinal stretching ratio is
2.9, cross directional stretch ratio is 3.0, and heat setting temperature is 270 DEG C, and heat-setting time is 1min, no heat treatment
Process.
Comparative example 4
The reflectance coating that such as embodiment 4 is provided, in its preparation method, in drawing process：Longitudinal stretching ratio is
2.6, cross directional stretch ratio is 3.1, and heat setting temperature is 260 DEG C, and heat-setting time is 2min, no heat treatment
Process.
Comparative example 5
The reflectance coating that such as embodiment 5 is provided, in its preparation method, in drawing process：Longitudinal stretching ratio is
2.8, cross directional stretch ratio is 2.9, and heat setting temperature is 280 DEG C, and heat-setting time is 0.6min, no heat treatment
Process.
Comparative example 6
The reflectance coating that such as embodiment 6 is provided, in its preparation method, in drawing process：Longitudinal stretching ratio is
3.2, cross directional stretch ratio is 2.8, and heat setting temperature is 250 DEG C, and heat-setting time is 2min, no heat treatment
Process.
The eastern beautiful product of comparative example 7, reflectance coating model E81C188, reflection film thickness is 188 μm.
The performance test table of embodiment 1-8 of table 1 gained low heat shrinkage polyester reflective film
The performance test table of comparative example 1-7 of table 2 gained reflectance coating
Data by shown in above-mentioned Tables 1 and 2 can draw, using obtained in the preparation method that the present invention is provided
Low heat shrinkage polyester reflective film has relatively low thermal contraction, higher reflectivity and deflection simultaneously, comprehensive
Can be preferably applied widely.Wherein, low heat shrinkage obtained in the preparation method that embodiment 5,7 and 8 is provided
Polyester reflective film has more preferable combination property.
The above, only presently preferred embodiments of the present invention is not intended to limit the protection model of the present invention
Enclose.Every impartial change done according to present invention and modification, are encompassed by the scope of the claims of the present invention
It is interior.
Claims (10)
1. a kind of preparation method of low heat shrinkage polyester reflective film, the polyester reflective film has ABA three-layer co-extruded
Structure, has foam structure, it is characterised in that the preparation method includes in the B layers of the polyester reflective film
Following steps：
(1) raw material for preparing polyester reflective film is mixed, fusion plastification is extruded using three-layer co-extruded technique, cooling
Slab；Slab to obtaining carries out longitudinal stretching, cross directional stretch；
(2) film that step (1) is obtained is carried out into thermal finalization, heat setting temperature is 220-240 DEG C；After cooling again
It is heat-treated, heat treatment temperature is 60-120 DEG C.
2. the preparation method of low heat shrinkage polyester reflective film as claimed in claim 1, it is characterised in that in step
Suddenly in (2), heat setting temperature is 220-240 DEG C, and the time is 2-10s；It is heat-treated again after cooling, heat
Treatment temperature is 60-120 DEG C, and the time is 20-60s.
3. the preparation method of low heat shrinkage polyester reflective film as claimed in claim 2, it is characterised in that in step
Suddenly in (2), the heat treatment temperature is 80-100 DEG C, and the time is 40-50s.
4. the preparation method of low heat shrinkage polyester reflective film as claimed in claim 1, it is characterised in that in step
Suddenly in (1), the temperature of fusion plastification is 260-280 DEG C, and the temperature of cooling is 20-30 DEG C, gained slab
Thickness is 300-4000 μm.
5. the preparation method of low heat shrinkage polyester reflective film as claimed in claim 1, it is characterised in that in step
Suddenly in (1), longitudinal drawing temperature is 80-95 DEG C, and transverse drawing temperature is 100-125 DEG C.
6. the preparation method of low heat shrinkage polyester reflective film as claimed in claim 1, it is characterised in that in step
Suddenly in (1), longitudinal stretching ratio is 3.5-4.2, and longitudinal drawing temperature is 80-95 DEG C；Cross directional stretch ratio is 3.5-4.2,
Transverse drawing temperature is 100-125 DEG C.
7. the preparation method of low heat shrinkage polyester reflective film as claimed in claim 1, it is characterised in that in step
Suddenly in (1), longitudinal stretching ratio is 3.8-4.0, and longitudinal drawing temperature is 82-85 DEG C；Cross directional stretch ratio is 3.8-4.0,
Transverse drawing temperature is 100-105 DEG C.
8. the preparation method of low heat shrinkage polyester reflective film as claimed in claim 1, it is characterised in that described
In polyester reflective film, the raw material of A layers includes following components：The polyester resin of 80-95%, the inorganic grain of 5-20%
Son；The raw material of B layers includes following components：60-76% polyester resin, 5-20% inorganic particulates, 10-15% is not
Compatibilized resin, 2-5% toughened resins, 2-5% tackifying resins；The percentage is weight percentage.
9. the preparation method of low heat shrinkage polyester reflective film as claimed in claim 8, it is characterised in that described
Preparation method is comprised the following steps：
(1) reflection polyester functional agglomerate is prepared：By inorganic particulate, incompatible resin, toughened resin and tackifying resin
With polyester resin as carrier, reflection polyester functional agglomerate is prepared；
(2) slab：Using three-layer co-extruded technique；For B layers, by polyester resin and step (1) obtain it is anti-
Penetrate polyester functional agglomerate to mix by proportioning, reflection polyester functional agglomerate and polyester resin fusion plastification pass through
After tri- layers of clothes hanger type slit die heads of ABA, it is cast to after the chilling roller of pole and is quickly cooled to below polyester fiberglass temperature
And form slab；
(3) slab of glassy state is first used into longitudinal stretching machine longitudinal stretching, then carries out cross directional stretch with the machine of widening；
(4) film that step (3) is obtained is carried out into thermal finalization, heat setting temperature is 220-240 DEG C；After cooling again
It is heat-treated, heat treatment temperature is 60-120 DEG C.
10. a kind of backlight module, it is characterised in that the backlight module includes that low-heat as claimed in claim 1 is received
Shrinkage polyester reflective film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510755293.9A CN106671544B (en) | 2015-11-09 | 2015-11-09 | A kind of preparation method of low heat shrinkage polyester reflective film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510755293.9A CN106671544B (en) | 2015-11-09 | 2015-11-09 | A kind of preparation method of low heat shrinkage polyester reflective film |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106671544A true CN106671544A (en) | 2017-05-17 |
| CN106671544B CN106671544B (en) | 2019-08-20 |
Family
ID=58863986
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510755293.9A Active CN106671544B (en) | 2015-11-09 | 2015-11-09 | A kind of preparation method of low heat shrinkage polyester reflective film |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106671544B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109367046A (en) * | 2018-09-26 | 2019-02-22 | 江阴长庚高科技材料有限公司 | A kind of high-impact two-way stretching polyamide film and thirdly bubble production method and application |
| CN112810116A (en) * | 2020-12-29 | 2021-05-18 | 宁波长阳科技股份有限公司 | Plastic uptake processing method and product |
| CN115746376A (en) * | 2022-11-04 | 2023-03-07 | 宁波东旭成新材料科技有限公司 | Preparation method of low-shrinkage optical reflecting film |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1246825A (en) * | 1997-10-03 | 2000-03-08 | 东丽株式会社 | Biaxially oriented polyester film |
| CN1565835A (en) * | 2003-07-02 | 2005-01-19 | 上海紫东化工塑料有限公司 | Polyester film with low percent thermal shrinkage and production method thereof |
| JP2015044406A (en) * | 2013-07-23 | 2015-03-12 | 東洋紡株式会社 | Polypropylene multilayer stretched film |
| CN104608446A (en) * | 2015-01-16 | 2015-05-13 | 宁波长阳科技有限公司 | White reflective polyester film and preparation method thereof |
-
2015
- 2015-11-09 CN CN201510755293.9A patent/CN106671544B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1246825A (en) * | 1997-10-03 | 2000-03-08 | 东丽株式会社 | Biaxially oriented polyester film |
| CN1565835A (en) * | 2003-07-02 | 2005-01-19 | 上海紫东化工塑料有限公司 | Polyester film with low percent thermal shrinkage and production method thereof |
| JP2015044406A (en) * | 2013-07-23 | 2015-03-12 | 東洋紡株式会社 | Polypropylene multilayer stretched film |
| CN104608446A (en) * | 2015-01-16 | 2015-05-13 | 宁波长阳科技有限公司 | White reflective polyester film and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 方少明 等: "《高分子材料成型工程》", 30 June 2014 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109367046A (en) * | 2018-09-26 | 2019-02-22 | 江阴长庚高科技材料有限公司 | A kind of high-impact two-way stretching polyamide film and thirdly bubble production method and application |
| CN109367046B (en) * | 2018-09-26 | 2021-10-29 | 江阴长庚高科技材料有限公司 | High-impact-resistance biaxially oriented polyamide film and three-bubble production method and application thereof |
| CN112810116A (en) * | 2020-12-29 | 2021-05-18 | 宁波长阳科技股份有限公司 | Plastic uptake processing method and product |
| CN115746376A (en) * | 2022-11-04 | 2023-03-07 | 宁波东旭成新材料科技有限公司 | Preparation method of low-shrinkage optical reflecting film |
| CN115746376B (en) * | 2022-11-04 | 2024-03-22 | 宁波东旭成新材料科技有限公司 | Preparation method of low-shrinkage optical reflection film |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106671544B (en) | 2019-08-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104608446B (en) | A kind of white reflective mylar and preparation method thereof | |
| CN100586992C (en) | Reflective film and reflector plate | |
| US8257821B2 (en) | Light diffusion film | |
| CN105109166B (en) | A kind of anti-absorption application type reflection polyester film and preparation method thereof | |
| TWI437041B (en) | An aliphatic polyester film | |
| TWI362998B (en) | ||
| CN106908877B (en) | A kind of folding polyester reflective film and preparation method thereof | |
| CN103467762B (en) | The manufacture method of white films | |
| WO2006064907A1 (en) | Light reflector and surface light source device | |
| CN106496902A (en) | A kind of light scattering thermoplastic polyester composition | |
| CN106908879B (en) | A kind of high-stiffness reflectance coating and preparation method thereof | |
| CN106671544A (en) | Preparation method of low-thermal-shrinkage polyester polyester reflective film | |
| KR102078451B1 (en) | White polyester film and reflective sheet using the same | |
| CN110908025A (en) | Reflective film and method for producing same | |
| TWI492971B (en) | Optical film and preparation method thereof | |
| CN106908868B (en) | A kind of resistance to injured polyester reflective film and preparation method thereof | |
| CN112485946A (en) | Reflective film for thin direct type liquid crystal display device and preparation method thereof | |
| CN103777261B (en) | A kind of reflectance coating | |
| CN110837142B (en) | White reflective polyester film | |
| JP5464997B2 (en) | Light reflector and surface light source device | |
| CN103044777B (en) | Monolayer two-way stretch light reflection polypropylene film and manufacturing method thereof | |
| CN106751573A (en) | A kind of optical reflectance coating with low heat shrinkage and preparation method thereof | |
| CN112297552A (en) | White reflective polyester film | |
| CN103048711B (en) | Composite biaxial tension light reflection polypropylene film and manufacturing method thereof | |
| CN100510792C (en) | Semitransparent reflector |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20170517 Assignee: Ningbo Changlong New Material Co.,Ltd. Assignor: NINGBO SOLARTRON TECHNOLOGY Co.,Ltd. Contract record no.: X2021330000199 Denomination of invention: A preparation method of polyester reflective film with low heat shrinkage Granted publication date: 20190820 License type: Common License Record date: 20210831 |
|
| EE01 | Entry into force of recordation of patent licensing contract |