CN103724975B - A kind of high light reflectivity PC membrane materials and preparation method thereof - Google Patents
A kind of high light reflectivity PC membrane materials and preparation method thereof Download PDFInfo
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Abstract
A kind of high light reflectivity PC membrane materials and preparation method thereof, it is characterised in that it is comprised the steps of：1）TiO with hollow structure2The preparation of/heat-shrinkable polymer composite particles：By TiO2With heat-shrinkable polymer, after being well mixed with high mixer, extruded, be granulated with double screw extruder, pellet is dried into 4h at 100 DEG C, obtains the TiO with hollow structure2/ heat-shrinkable polymer composite particles；2）The preparation of high light reflectivity PC membrane materials：By the step 1）The TiO of preparation2/ heat-shrinkable polymer composite particles, PC and dimethicone, after being well mixed with high mixer, extruded, be granulated at 280 DEG C with double screw extruder, pellet is dried into 4h at 120 DEG C, high light reflectivity PC membrane materials are prepared.The present invention has the advantages that reflectivity is high, production cost is low, preparation technology is simple.
Description
Technical field
The present invention relates to a kind of high light reflectivity PC membrane materials and preparation method thereof, belong to high-molecular compound Material Field.
Background technology
In recent years, liquid crystal display is because it has the advantages that high image quality, low energy consumption, space-efficient, and gradually substitution is former
Some cathode-ray tubes and turn into the market mainstream.But to show one's talent in numerous displays, it is necessary to further improve
The display effect of liquid crystal display, especially brightness and uniformity.In fact, liquid crystal does not light in itself, therefore improve its backlight
The brightness in source, reduce the active demand that light loss is liquid crystal and backlight industry.
Reflectance coating is a significant components of backlight of LCD, and its main function is will to spill light guide plate bottom
Light efficiently reflects, and so as to reduce light loss, reduces power consumption, there is provided give LCD light saturation degree.Due to liquid crystal
The large screen of showing device and the High Level requirement of display performance are, it is necessary to the reflectance coating of high reflectance.How reflectance coating is improved
Optical property, reflectivity is improved, reduce light loss, so that the light sent from light source can be utilized at utmost, it is existing
In a field of liquid crystal display major issue urgently to be resolved hurrily.
At present, occurs the invention of many optical reflection film materials both at home and abroad, its membrane material species mainly has：Polypropylene
（PP）, polyethylene terephthalate（PET）And makrolon（PC）Deng, such as：Chinese patent CN 201110077909.3
A kind of PP fretting maps reflectance coating is disclosed, the reflectance coating is using PP, maleic anhydride and composite foamable agent as primary raw material；It is Chinese special
Sharp CN 201120406203.2 discloses a kind of PP fretting map reflectance coatings with uvioresistant cortex；Chinese patent CN
A kind of white reflection film disclosed in 200780023645.5, it is that PET film is subjected to biaxial stretch-formed formation micropore, then in the reflectance coating
At least one face on apply the PET reflection film that forms of last layer spherical particle；Described in Chinese patent CN 201010589161.0
Reflection diaphragm is using PET as base material, then adds organic foaming agent and that inorganic particle is prepared is a kind of with high reflectance
PET reflection piece；Chinese patent CN 201120406619.2 discloses a kind of PET fretting maps reflectance coating, and the reflectance coating carries anti-purple
Outside line cortex.
Compared with PP and PET, PC optical reflection films have higher heat resistance, can in a liquid crystal display it is long-term use of without
Deformation, is received more and more attention in recent years.The method for preparing PC optical reflection films at present mainly reflects grain by adding light
Son makes reflectance coating produce micropore or bubble, using between the refraction of light reflective particle or the substrate resin of film and micropore or bubble
Refractive index difference improve reflectivity.
Wherein, it is presently mainly to use supercritical gas method to prepare PC optical reflection films with micropore or bubble, such as Chinese patent CN
200480028614.5 by the way that supercritical gas is impregnated into PC-PDMS copolymers, then allows PC-PDMS to be copolymerized by degassing
Thing foaming forms micropore in PC reflectance coatings, so as to improve its reflectivity.Although reflectance coating can be improved by introducing supercritical gas
Reflectivity, but this method requires process equipment high, it is necessary to specific supercritical foaming equipment, and severe reaction conditions,
Processing cost is expensive, and with the raising of reflection membrane porosity, the i.e. bubble of film or micro content increase so that reflectance coating becomes
It is soft, cause reflectance coating easily to produce wrinkle in using process, so as to influence the quality of optical reflection film and life-span, thus this
Method is using less.
At present, the most important preparation method of PC optical reflection films is addition light reflective particle method, and its light reflective particle is mainly
Titanium dioxide（TiO2）, its adding method is mainly by TiO2Directly it is blended with PC with other additives, such as Chinese patent CN
201210375698.6 using PC and TiO2The reflector plate with high shading high reflection has been made in masterbatch blending；Japan Patent JP
A kind of PC reflectance coatings, are by adding TiO disclosed in 19952428102And one kind that other fillers are prepared has high reflection
The PC optical reflection films of rate；Japan Patent JP 2004149623 disclose it is a kind of there is anti-flammability, high reflectivity, high light-proofness
PC reflectance coatings, the reflectance coating are by a kind of PC compositions and TiO2It is prepared by blending；Chinese patent CN
200580025693.9 by PC-PDMS copolymers and TiO2Blending is formed after film and obtained by biaxial stretch-formed containing bubble, i.e.,
There are the PC optical reflection films in space；Chinese patent CN 201110051136.1 is by by base material and inorganic particulate（Such as TiO2）And increasing
The raw materials such as stick are blended, and biaxial tension obtains the porous PC films with high reflectance；Chinese patent CN
200580050285.9 by substrate resin and TiO2Blending obtains the PC compositions with good reflection rate；Chinese patent CN
200710164110.1 by PC, bromination PC, acrylic acid copolymerization thing, graininess TiO2, antioxidant, lubricant and PTFE it is micro-
Powder is blended, and is prepared for a kind of PC optical reflection films of high light reflectivity；Chinese patent CN 200680048674.2 is by inorganic micro powder shape
Particle is added in PC base materials, and the light with excellent reflection performance and favorable luminance for obtaining being combined by multilayer membrane structure is anti-
Penetrate film；United States Patent (USP) US 5837757A are first by PC and TiO2Other additives are added again after powder mixing, obtain having well anti-
Penetrate the PC films of rate and light screening properties；A kind of optical reflection film disclosed in Chinese patent CN 200910146519.x is with aromatic series
PC and TiO2The optical reflection film for the excellent performance to be formed is blended for main component；Disclosed in United States Patent (USP) US 20060159926Al
Optical reflection film is with PC-PDMS, PC and TiO2Blending, which is carried out, for main component forms PC optical reflection films；United States Patent (USP) US
The PC optical reflection films that 7964273B2 is introduced are the TiO of the PC polymer and 5 ~ 30% mass parts by 70 ~ 95% mass parts2After blending
It is prepared, the TiO2It is surface-treated by the hydrous oxide of aluminium or silicon, amines, polyol compound etc..
Above-mentioned patent is usually by inorganic smooth reflective particle（Mainly TiO2）It is directly appended in PC base materials, so as to improve
The reflectivity of reflectance coating, but this method shortcoming be extremely difficult to liquid crystal display it is higher and higher to reflectance coating reflectivity will
Ask, and TiO2The addition of inorganic particulate is big, and the density of reflectance coating is big, and film forming area is few, and cost is high, and mechanical strength is low.Therefore
The reflectivity of reflectance coating how is improved, reduces TiO2Usage amount, reduce cost, turn into the research direction of current PC reflectance coating.
This patent uses the TiO with hollow structure2Composite particles prepare PC reflectance coatings, when light is shining into, in unique
Hollow structure can cause the multiple reflections of light, add the reflectivity of PC films；Partial air is introduced in hollow composite particles,
The density of PC membrane materials is reduced, film forming area is added, reduces cost；Preparation technology is simple, and equipment requirement is low.
The content of the invention
It is an object of the invention to overcome defect present in above-mentioned prior art：There is provided a kind of reflectivity is high, cost is low,
Simply a kind of material of high reflection PC films of preparation technology and preparation method thereof.
The present invention principle be：First pass through blending, extrusion, be granulated the polymer overmold with heat-shrinkable in TiO2Table
Face, in cooling procedure, due to heat-shrinkable polymer appearance elder generation cooling and shaping, polymer and TiO2Connected inner boundary then to
Outer contraction, depart from TiO2And form hollow structure.When light irradiates, light is first in heat-shrinkable polymer/PC interfaces shape
Into first reflection, residual ray reflects to form the second secondary reflection, then remaining light by air/heat-shrinkable polymer interface again
Line is in TiO2/ Air Interface forms third time and reflected, and ultimately forms multiple reflections, reflectivity is improved；Further, since introduce
Partial air, reduces the density of PC membrane materials, adds film forming area, reduce cost；Preparation process is in common height
It can be completed in mixed machine and extruder, preparation technology is simple, and controllability is good, and equipment requirement is low.
Present disclosure is：A kind of high light reflectivity PC membrane materials and preparation method thereof, it is characterised in that it is by with
The TiO of hollow structure2/ heat-shrinkable polymer composite particles, PC, dimethicone composition；Quality percentage shared by each raw material
Number is hollow composite particles 25 ~ 65%, PC 34.5 ~ 74.5%, dimethicone 0.5%, preferably hollow composite particles 40 ~ 50%,
PC 49.5 ~ 59.5%, dimethicone 0.5%, mass percent sum shared by each raw material are 100%.
The above-mentioned TiO with hollow structure2/ heat-shrinkable polymer composite particles are by TiO2With heat-shrinkable polymer
Composition, described TiO2For rutile TiO2, average grain diameter is 0.1 ~ 2 μm, preferably 0.1 ~ 0.3 μm；The heat-shrinkable gathers
Compound is linear low density polyethylene (LLDPE) (LLDPE), low density polyethylene (LDPE) (LDPE), high density polyethylene (HDPE) (HDPE), PP, polyformaldehyde
(POM), polymethyl methacrylate (PMMA), preferably PET, LLDPE, percentage shared by each raw material are TiO2 20 ~ 60%, it is hot
Shrinkage polymer 40 ~ 80%, preferably TiO2 35 ~ 45%, heat-shrinkable polymer 55 ~ 65%, mass percent shared by each raw material
Sum is 100%.
A kind of high light reflectivity PC membrane materials and preparation method thereof, it is characterised in that its preparation method comprises the steps of：
1）TiO with hollow structure2The preparation of/heat-shrinkable polymer composite particles：By 20 ~ 60% TiO2、40~
80% heat-shrinkable polymer, with high mixer it is well mixed after, in highest extrusion temperature be 130 ~ 170 with double screw extruder
Extrude, be granulated under conditions of DEG C, pellet is dried into 4h at 100 DEG C, obtains the TiO with hollow structure2/ heat-shrinkable polymerize
Thing composite particles；
2）The preparation of high light reflectivity PC membrane materials：By 25 ~ 65% steps 1）The TiO of preparation2/ heat-shrinkable polymer
The dimethicone of composite particles, 34.5 ~ 74.5% PC and 0.5%, after being well mixed with high mixer, existed with double screw extruder
Extrude, be granulated at 280 DEG C, pellet is dried into 4h at 120 DEG C, high light reflectivity PC membrane materials are prepared；
3）The preparation of high light reflectivity PC films：By the step 2）The high light reflectivity PC membrane materials Single screw extrusion stream of preparation
Saliva machine is prepared into the PC optical reflection films that thickness is 250 μm at 280 DEG C.
Compared with prior art, the present invention has following features and beneficial effect：
1）This patent uses the TiO with hollow structure2Composite particles prepare PC reflectance coatings, unique when light is shining into
Hollow structure can cause the multiple reflections of light, add the reflectivity of PC films；
2）Partial air is introduced in hollow composite particles, reduces the density of PC membrane materials, adds film forming area, is dropped
Low cost；
3）Preparation process can be completed in common high mixer and extruder, and preparation technology is simple, and equipment requirement is low.
Embodiment
The technical characterstic of the present invention is furtherd elucidate below by embodiment.These embodiments are only used for help pair
The purpose of the understanding of the technology of the present invention, must not be in this, as the further limitation to the scope of the present invention.
The implementation result of embodiment is understood for contrast, high light reflectivity PC membrane material Single screw extrusions prepared by embodiment
Slobbering machine is prepared into the PC optical reflection films that thickness is 250 μm at 280 DEG C, determines the light reflectivity of film, implements for contrasting
The effect of example.
Comparative example 1
By 74.5% PC, 25% TiO2Powder and 0.5% dimethicone, after being well mixed with high mixer, with double spiral shells
Bar extruder is extruded at 280 DEG C, is granulated, and after pellet is dried into 4h at 120 DEG C, high light reflectivity PC membrane materials are prepared.
Light reflectivity test result with its 250 μ m-thick PC film being prepared is as shown in table 1.
Embodiment 1
A kind of high light reflectivity PC membrane materials and preparation method thereof, it is characterized in that comprising the following steps：
1）TiO2The preparation of/PP composite particles：By 40% TiO2, 60% PP, with high mixer it is well mixed after, with double spiral shells
Bar extruder extrusion, it is granulated, pellet is dried into 4h at 100 DEG C, obtains the TiO with hollow structure2/ PP composite particles；
2）The preparation of high light reflectivity PC membrane materials：By 25% step 1）The TiO of preparation2/ PP composite particles, 74.5%
PC and 0.5% dimethicone, after being well mixed with high mixer, extruded, be granulated at 280 DEG C with double screw extruder, will
After pellet dries 4h at 120 DEG C, high light reflectivity PC membrane materials are prepared.With the light of its 250 μ m-thick PC film being prepared
Reflectance test result is as shown in table 1.
Embodiment 2
A kind of high light reflectivity PC membrane materials and preparation method thereof, it is characterized in that comprising the following steps：
1）TiO2The preparation of/POM composite particles：By 40% TiO2, 60% POM, with high mixer it is well mixed after, with double
Screw extruder extrusion, it is granulated, pellet is dried into 4h at 100 DEG C, obtains the TiO with hollow structure2/ POM composite particles；
2）The preparation of high light reflectivity PC membrane materials：By 25% step 1）The TiO of preparation2/ POM composite particles, 74.5%
PC and 0.5% dimethicone, with high mixer it is well mixed after, extrude, is granulated at 280 DEG C with double screw extruder, general
Pellet dries 4h at 120 DEG C, and high light reflectivity PC membrane materials are prepared.Light with its 250 μ m-thick PC film being prepared is anti-
It is as shown in table 1 to penetrate rate test result.
Embodiment 3
A kind of high light reflectivity PC membrane materials and preparation method thereof, it is characterized in that comprising the following steps：
1）TiO2The preparation of/LLDPE composite particles：By 40% TiO2, 60% LLDPE, with high mixer it is well mixed after,
Extruded, be granulated with double screw extruder, pellet is dried into 4h at 100 DEG C, obtains the TiO with hollow structure2/ LLDPE is multiple
Close particle；
2）The preparation of high light reflectivity PC membrane materials：By 25% step 1）The TiO of preparation2/ LLDPE composite particles,
74.5% PC and 0.5% dimethicone, after being well mixed with high mixer, extruded with double screw extruder, pellet, by pellet
4h is dried at 120 DEG C, high light reflectivity PC membrane materials are prepared.With the light reflectivity of its 250 μ m-thick PC film being prepared
Test result is as shown in table 1.
Embodiment 4
A kind of high light reflectivity PC membrane materials and preparation method thereof, it is characterized in that comprising the following steps：
1）TiO2The preparation of/PMMA composite particles：By 40% TiO2, 60% PMMA, with high mixer it is well mixed after, use
Double screw extruder extrusion, it is granulated, pellet is dried into 4h at 100 DEG C, obtains the TiO with hollow structure2Compound of/PMMA
Grain；
2）The preparation of high light reflectivity PC membrane materials：By 25% step 1）The TiO of preparation2/ PMMA composite particles, 74.5%
PC and 0.5% dimethicone, with high mixer it is well mixed after, extrude, is granulated at 280 DEG C with double screw extruder, general
Pellet dries 4h at 120 DEG C, and high light reflectivity PC membrane materials are prepared.Light with its 250 μ m-thick PC film being prepared is anti-
It is as shown in table 1 to penetrate rate test result.
Embodiment 5
A kind of high light reflectivity PC membrane materials and preparation method thereof, it is characterized in that comprising the following steps：
1）TiO2The preparation of/PET composite particles：By 40% TiO2, 60% PET, with high mixer it is well mixed after, with double
Screw extruder extrusion, it is granulated, pellet is dried into 4h at 100 DEG C, obtains the TiO with hollow structure2/ PET composite particles；
2）The preparation of high light reflectivity PC membrane materials：By 25% step 1）The TiO of preparation2/ PET composite particles, 74.5%
PC and 0.5% dimethicone, with high mixer it is well mixed after, extrude, is granulated at 280 DEG C with double screw extruder, general
Pellet dries 4h at 120 DEG C, and high light reflectivity PC membrane materials are prepared.Light with its 250 μ m-thick PC film being prepared is anti-
It is as shown in table 1 to penetrate rate test result.
Table 1 coats TiO2Influence of the type of polymer to PC film reflectivity
Work as TiO as can be seen from Table 12When the coating on surface is LLDPE, adds in PC and make as composite particles
It is standby into PC films there is highest reflectivity because, for PET, PP, PMMA and PET, LLDPE thermal contraction
Rate highest, so that relatively large number of gap structure can be formed in reflectance coating；But when polymer is PMMA and POM, PC
The reflectivity of reflectance coating declines on the contrary, because PMMA and POM reflectivity is not only below PC reflectance coatings, and their heat
Shrinkage factor is very low, so that it cannot in TiO2Surface forms pore structure.
Embodiment 6
A kind of high light reflectivity PC membrane materials and preparation method thereof, it is characterized in that comprising the following steps：
1）TiO2The preparation of/LDPE composite particles：By 40% TiO2, 60% LDPE, with high mixer it is well mixed after, use
Double screw extruder extrusion, it is granulated, pellet is dried into 4h at 100 DEG C, obtains the TiO with hollow structure2Compound of/LDPE
Grain；
2）The preparation of high light reflectivity PC membrane materials：By 25% step 1）The TiO of preparation2/ LDPE composite particles, 74.5%
PC and 0.5% dimethicone, with high mixer it is well mixed after, extrude, is granulated at 280 DEG C with double screw extruder, general
Pellet dries 4h at 120 DEG C, and high light reflectivity PC membrane materials are prepared.Light with its 250 μ m-thick PC film being prepared is anti-
It is as shown in table 2 to penetrate rate test result.
Embodiment 7
A kind of high light reflectivity PC membrane materials and preparation method thereof, it is characterized in that comprising the following steps：
1）TiO2The preparation of/LLDPE composite particles：By 40% TiO2, 60% LLDPE, with high mixer it is well mixed after,
Extruded, be granulated with double screw extruder, pellet is dried into 4h at 100 DEG C, obtains the TiO with hollow structure2/ LLDPE is multiple
Close particle；
2）The preparation of light reflected P C membrane materials：By 25% step 1）The TiO of preparation2/ LLDPE composite particles, 74.5%
PC and 0.5% dimethicone, with high mixer it is well mixed after, extrude, is granulated at 280 DEG C with double screw extruder, general
Pellet dries 4h at 120 DEG C, and high light reflectivity PC membrane materials are prepared.Light with its 250 μ m-thick PC film being prepared is anti-
It is as shown in table 2 to penetrate rate test result.
Embodiment 8
A kind of high light reflectivity PC membrane materials and preparation method thereof, it is characterized in that comprising the following steps：
1）TiO2The preparation of/HDPE composite particles：By 40% TiO2, 60% HDPE, with high mixer it is well mixed after, use
Double screw extruder extrusion, it is granulated, pellet is dried into 4h at 100 DEG C, obtains the TiO with hollow structure2Compound of/HDPE
Grain；
2）The preparation of high light reflectivity PC membrane materials：By 25% step 1）The TiO of preparation2/ HDPE composite particles, 74.5%
PC and 0.5% dimethicone, with high mixer it is well mixed after, extrude, is granulated at 280 DEG C with double screw extruder, general
Pellet dries 4h at 120 DEG C, and high light reflectivity PC membrane materials are prepared.Light with its 250 μ m-thick PC film being prepared is anti-
It is as shown in table 2 to penetrate rate test result.
Influence of the PE species of table 2 to PC film reflectivity
As can be seen from Table 2 when PE species is LLDPE, PC films have highest reflectivity.Because LLDPE
Percent thermal shrinkage highest, so that the composite particles have more gap structure.
Embodiment 9
A kind of high light reflectivity PC membrane materials and preparation method thereof, it is characterized in that comprising the following steps：
1）TiO2The preparation of/LLDPE composite particles：By 20% TiO2, 80% LLDPE, with high mixer it is well mixed after,
Extruded, be granulated with double screw extruder under conditions of being 140 DEG C in highest extrusion temperature, pellet is dried into 4h at 100 DEG C, obtained
To the TiO with hollow structure2/ LLDPE composite particles；
2）The preparation of high light reflectivity PC membrane materials：By 25% step 1）The TiO of preparation2/ LLDPE composite particles,
74.5% PC and 0.5% dimethicone, after being well mixed with high mixer, squeezed with twin-screw and extrude, be granulated at 280 DEG C,
Pellet is dried into 4h at 120 DEG C, high light reflectivity PC membrane materials are prepared.With the light of its 250 μ m-thick PC film being prepared
Reflectance test result is as shown in table 3.
Embodiment 10
A kind of high light reflectivity PC membrane materials and preparation method thereof, it is characterized in that comprising the following steps：
1）TiO2The preparation of/LLDPE composite particles：By 30% TiO2, 70% LLDPE, with high mixer it is well mixed after,
Extruded, be granulated with double screw extruder under conditions of being 140 DEG C in highest extrusion temperature, pellet is dried into 4h at 100 DEG C obtains
To the TiO with hollow structure2/ LLDPE composite particles；
2）The preparation of high light reflectivity PC membrane materials：By 25% step 1）The TiO of preparation2/ LLDPE composite particles,
74.5% PC and 0.5% dimethicone, after being well mixed with high mixer, extruded, made at 280 DEG C with double screw extruder
Grain, pellet is dried into 4h at 120 DEG C, high light reflectivity PC membrane materials are prepared.With its 250 μ m-thick PC film being prepared
Light reflectivity test result is as shown in table 3.
Embodiment 11
A kind of high light reflectivity PC membrane materials and preparation method thereof, it is characterized in that comprising the following steps：
1）TiO2The preparation of/LLDPE composite particles：By 40% TiO2, 60% LLDPE, with high mixer it is well mixed after,
Extruded, be granulated with double screw extruder under conditions of being 140 DEG C in highest extrusion temperature, pellet is dried into 4h at 100 DEG C obtains
To the TiO with hollow structure2/ LLDPE composite particles；
2）The preparation of high light reflectivity PC membrane materials：By 25% step 1）The TiO of preparation2/ LLDPE composite particles,
74.5% PC and 0.5% dimethicone, after being well mixed with high mixer, extruded, made at 280 DEG C with double screw extruder
Grain, pellet is dried into 4h at 120 DEG C, high light reflectivity PC membrane materials are prepared.With its 250 μ m-thick PC film being prepared
Light reflectivity test result is as shown in table 3.
Embodiment 12
A kind of high light reflectivity PC membrane materials and preparation method thereof, it is characterized in that comprising the following steps：
1）TiO2The preparation of/LLDPE composite particles：By 50% TiO2, 50% LLDPE, with high mixer it is well mixed after,
Extruded, be granulated with double screw extruder under conditions of being 140 DEG C in highest extrusion temperature, pellet is dried into 4h at 100 DEG C obtains
To the TiO with hollow structure2/ LLDPE composite particles；
2）The preparation of high light reflectivity PC membrane materials：By 25% step 1）The TiO of preparation2/ LLDPE composite particles,
74.5% PC and 0.5% dimethicone, after being well mixed with high mixer, extruded, made at 280 DEG C with double screw extruder
Grain, pellet is dried into 4h at 120 DEG C, high light reflectivity PC membrane materials are prepared.With its 250 μ m-thick PC film being prepared
Light reflectivity test result is as shown in table 3.
Embodiment 13
A kind of high light reflectivity PC membrane materials and preparation method thereof, it is characterized in that comprising the following steps：
1）TiO2The preparation of/LLDPE composite particles：By 40% TiO2, 60% LLDPE, with high mixer it is well mixed after,
Extruded, be granulated with double screw extruder under conditions of being 140 DEG C in highest extrusion temperature, pellet is dried into 4h at 100 DEG C obtains
To the TiO with hollow structure2/ LLDPE composite particles；
2）The preparation of high light reflectivity PC membrane materials：By 25% step 1）The TiO of preparation2/ LLDPE composite particles,
74.5% PC and 0.5% dimethicone, after being well mixed with high mixer, extruded, made at 280 DEG C with double screw extruder
Grain, pellet is dried into 4h at 120 DEG C, high light reflectivity PC membrane materials are prepared.With its 250 μ m-thick PC film being prepared
Light reflectivity test result is as shown in table 3.
The TiO of table 32TiO in/LLDPE composite particles2Influence of the content to optical reflection film reflectivity
As can be seen from Table 3 as TiO in composite particles2Content be 40% when, using the composite particles as additive
PC films have highest reflectivity.Due to TiO2Itself there is higher reflectivity, and LLDPE reflectivity is less than PC, so
Work as TiO2Content be less than 40% when, the reflectivity of PC films is with TiO2Increasing for percentage and gradually increase, but work as TiO2's
When content is higher than 40%, TiO is coated on2On LLDPE amount just tail off, reunion is easily produced in extrusion process, is influenceed
The generation of gap structure, so as to reducing the reflectivity of PC films.
Embodiment 14
A kind of high light reflectivity PC membrane materials and preparation method thereof, it is characterized in that comprising the following steps：
1）TiO2The preparation of/LLDPE composite particles：By 40% TiO2, 60% LLDPE, with high mixer it is well mixed after,
Extruded, be granulated with double screw extruder under conditions of being 130 DEG C in highest extrusion temperature, pellet is dried into 4h at 100 DEG C obtains
To the TiO with hollow structure2/ LLDPE composite particles；
2）The preparation of high light reflectivity PC membrane materials：By 25% step 1）The TiO of preparation2/ LLDPE composite particles,
74.5% PC and 0.5% dimethicone, after being well mixed with high mixer, extruded, made at 280 DEG C with double screw extruder
Grain, pellet is dried into 4h at 120 DEG C, high light reflectivity PC membrane materials are prepared.With its 250 μ m-thick PC film being prepared
Light reflectivity test result is as shown in table 4.
Embodiment 15
A kind of high light reflectivity PC membrane materials and preparation method thereof, it is characterized in that comprising the following steps：
1）TiO2The preparation of/LLDPE composite particles：By 40% TiO2, 60% LLDPE, with high mixer it is well mixed after,
Extruded, be granulated with double screw extruder under conditions of being 140 DEG C in highest extrusion temperature, pellet is dried into 4h at 100 DEG C obtains
To the TiO with hollow structure2/ LLDPE composite particles；
2）The preparation of high light reflectivity PC membrane materials：By 25% step 1）The TiO of preparation2/ LLDPE composite particles,
74.5% PC and 0.5% dimethicone, after being well mixed with high mixer, extruded, made at 280 DEG C with double screw extruder
Grain, pellet is dried into 4h at 120 DEG C, high light reflectivity PC membrane materials are prepared.With its 250 μ m-thick PC film being prepared
Light reflectivity test result is as shown in table 4.
Embodiment 16
A kind of high light reflectivity PC membrane materials and preparation method thereof, it is characterized in that comprising the following steps：
1）TiO2The preparation of/LLDPE composite particles：By 40% TiO2, 60% LLDPE, with high mixer it is well mixed after,
Extruded, be granulated with double screw extruder under conditions of being 150 DEG C in highest extrusion temperature, pellet is dried into 4h at 100 DEG C obtains
To the TiO with hollow structure2/ LLDPE composite particles；
2）The preparation of high light reflectivity PC membrane materials：By 25% step 1）The TiO of preparation2/ LLDPE composite particles,
74.5% PC and 0.5% dimethicone, after being well mixed with high mixer, extruded, made at 280 DEG C with double screw extruder
Grain, pellet is dried into 4h at 120 DEG C, high light reflectivity PC membrane materials are prepared.With its 250 μ m-thick PC film being prepared
Light reflectivity test result is as shown in table 4.
Embodiment 17
A kind of high light reflectivity PC membrane materials and preparation method thereof, it is characterized in that comprising the following steps：
1）TiO2The preparation of/LLDPE composite particles：By 40% TiO2, 60% LLDPE, with high mixer it is well mixed after,
Extruded, be granulated with double screw extruder under conditions of being 160 DEG C in highest extrusion temperature, pellet is dried into 4h at 100 DEG C obtains
To the TiO with hollow structure2/ LLDPE composite particles；
2）The preparation of high light reflectivity PC membrane materials：By 25% step 1）The TiO of preparation2/ LLDPE composite particles,
74.5% PC and 0.5% dimethicone, after being well mixed with high mixer, extruded, made at 280 DEG C with double screw extruder
Grain, pellet is dried into 4h at 120 DEG C, high light reflectivity PC membrane materials are prepared.With its 250 μ m-thick PC film being prepared
Light reflectivity test result is as shown in table 4.
Embodiment 18
A kind of high light reflectivity PC membrane materials and preparation method thereof, it is characterized in that comprising the following steps：
1）TiO2The preparation of/LLDPE composite particles：By 40% TiO2, 60% LLDPE, with high mixer it is well mixed after,
Extruded, be granulated with double screw extruder under conditions of being 170 DEG C in highest extrusion temperature, pellet is dried into 4h at 100 DEG C obtains
To the TiO with hollow structure2/ LLDPE composite particles；
2）The preparation of high light reflectivity PC membrane materials：By 25% step 1）The TiO of preparation2/ LLDPE composite particles,
74.5% PC and 0.5% dimethicone, after being well mixed with high mixer, extruded, made at 280 DEG C with double screw extruder
Grain, pellet is dried into 4h at 120 DEG C, high light reflectivity PC membrane materials are prepared.With its 250 μ m-thick PC film being prepared
Light reflectivity test result is as shown in table 4.
Table 4 prepares influence of the highest extrusion temperature of composite particles to optical reflection film reflectivity
As can be seen from Table 4, when the highest extrusion temperature for preparing composite particles is 150 DEG C, PC films have highest
Reflectivity, because LLDPE percent thermal shrinkage is raised and increased with temperature in certain temperature range, so that warm herein
Scope internal void volume is spent to raise and increase with temperature.
Embodiment 19
A kind of high light reflectivity PC membrane materials and preparation method thereof, it is characterized in that comprising the following steps：
1）TiO2The preparation of/LLDPE composite particles：By 40% TiO2, 60% LLDPE, with high mixer it is well mixed after,
Extruded, be granulated with double screw extruder under conditions of being 150 DEG C in highest extrusion temperature, pellet is dried into 4h at 100 DEG C obtains
To the TiO with hollow structure2/ LLDPE composite particles；
2）The preparation of high light reflectivity PC membrane materials：By 25% step 1）The TiO of preparation2/ LLDPE composite particles,
74.5% PC and 0.5% dimethicone, after being well mixed with high mixer, extruded, made at 280 DEG C with double screw extruder
Grain, pellet is dried into 4h at 120 DEG C, high light reflectivity PC membrane materials are prepared.With its 250 μ m-thick PC film being prepared
Light reflectivity test result is as shown in table 5.
Embodiment 20
A kind of high light reflectivity PC membrane materials and preparation method thereof, it is characterized in that comprising the following steps：
1）TiO2The preparation of/LLDPE composite particles：By 40% TiO2, 60% LLDPE, with high mixer it is well mixed after,
Extruded, be granulated with double screw extruder under conditions of being 150 DEG C in highest extrusion temperature, pellet is dried into 4h at 100 DEG C obtains
To the TiO with hollow structure2/ LLDPE composite particles；
2）The preparation of high light reflectivity PC membrane materials：By 35% step 1）The TiO of preparation2/ LLDPE composite particles,
64.5% PC and 0.5% dimethicone, after being well mixed with high mixer, extruded, made at 280 DEG C with double screw extruder
Grain, pellet is dried into 4h at 120 DEG C, high light reflectivity PC membrane materials are prepared.With its 250 μ m-thick PC film being prepared
Light reflectivity test result is as shown in table 5.
Embodiment 21
A kind of high light reflectivity PC membrane materials and preparation method thereof, it is characterized in that comprising the following steps：
1）TiO2The preparation of/LLDPE composite particles：By 40% TiO2, 60% LLDPE, with high mixer it is well mixed after,
Extruded, be granulated with double screw extruder under conditions of being 150 DEG C in highest extrusion temperature, pellet is dried into 4h at 100 DEG C obtains
To the TiO with hollow structure2/ LLDPE composite particles；
2）The preparation of high light reflectivity PC membrane materials：By 45% step 1）The TiO of preparation2/ LLDPE composite particles,
54.5% PC and 0.5% dimethicone, after being well mixed with high mixer, extruded, made at 280 DEG C with double screw extruder
Grain, pellet is dried into 4h at 120 DEG C, high light reflectivity PC membrane materials are prepared.With its 250 μ m-thick PC film being prepared
Light reflectivity test result is as shown in table 5.
Embodiment 22
A kind of high light reflectivity PC membrane materials and preparation method thereof, it is characterized in that comprising the following steps：
1）TiO2The preparation of/LLDPE composite particles：By 40% TiO2, 60% LLDPE, with high mixer it is well mixed after,
Extruded, be granulated with double screw extruder under conditions of being 150 DEG C in highest extrusion temperature, pellet is dried into 4h at 100 DEG C obtains
To the TiO with hollow structure2/ LLDPE composite particles；
2）The preparation of high light reflectivity PC membrane materials：By 55% step 1）The TiO of preparation2/ LLDPE composite particles,
44.5% PC and 0.5% dimethicone, after being well mixed with high mixer, extruded, made at 280 DEG C with double screw extruder
Grain, pellet is dried into 4h at 120 DEG C, high light reflectivity PC membrane materials are prepared.With its 250 μ m-thick PC film being prepared
Light reflectivity test result is as shown in table 5.
Embodiment 23
A kind of high light reflectivity PC membrane materials and preparation method thereof, it is characterized in that comprising the following steps：
1）TiO2The preparation of/LLDPE composite particles：By 40% TiO2, 60% LLDPE, with high mixer it is well mixed after,
Extruded, be granulated with double screw extruder under conditions of being 150 DEG C in highest extrusion temperature, pellet is dried into 4h at 100 DEG C, obtained
To the TiO with hollow structure2/ LLDPE composite particles；
2）The preparation of high light reflectivity PC membrane materials：By 65% step 1）The TiO of preparation2/ LLDPE composite particles,
34.5% PC and 0.5% dimethicone, after being well mixed with high mixer, extruded, made at 280 DEG C with double screw extruder
Grain, pellet is dried into 4h at 120 DEG C, high light reflectivity PC membrane materials are prepared.With its 250 μ m-thick PC film being prepared
Light reflectivity test result is as shown in table 5.
Influence of the composite particles content to optical reflection film reflectivity in the PC films of table 5
As can be seen from Table 5, when composite particles addition is 45% in PC films, PC films have highest reflectivity, and
With the increase of composite particles addition, PC film reflectivity gradually increases, but when content is more than 45%, reflectivity has decline
Trend because containing LLDPE in composite particles, its reflectivity is less than PC, so when composite particles usage amount is excessive
The reflectivity of PC films can be reduced on the contrary.
As can be seen from the above embodiments, with directly adding general T iO2Compare, TiO of the addition with hollow structure2/
The reflectivity of PC reflectance coatings prepared by LLDPE composite particles can bring up to 98.7% from 94.8%, positive effect.
Bound, the section value of each raw material of the present invention, and technological parameter（Such as highest extrusion temperature）Bound, area
Between value can realize the present invention, embodiment numerous to list herein.
Claims (2)
1. a kind of high light reflectivity PC membrane materials, it is characterised in that it is by the titanium dioxide (TiO with hollow structure2)/heat-shrinkable
Polymer composite particles, makrolon (PC), dimethicone raw material composition；Mass percent shared by described each raw material is：
Hollow composite particles 40~50%, PC 49.5~59.5%, dimethicone 0.5%, mass percent sum shared by each raw material
For 100%；Hollow composite particles are by TiO2Formed with heat-shrinkable polymer；TiO2For rutile-type, average grain diameter is 0.1~
0.3μm；Heat-shrinkable polymer is linear low density polyethylene (LLDPE)；In hollow composite particles, TiO2Ratio for 35~45%, heat
The ratio of shrinkage polymer is 55~65%, TiO2Hollow composite particles mass percent sum is accounted for heat-shrinkable polymer
For 100%.
2. the preparation method of a kind of high light reflectivity PC membrane materials according to claim 1, it is characterised in that it includes following
Step：
1) there is the TiO of hollow structure2The preparation of/heat-shrinkable polymer composite particles：By TiO2, heat-shrinkable polymer use
After high mixer is well mixed, extrusion, granulation under conditions of being 130~170 DEG C in highest extrusion temperature with double screw extruder will
Pellet dries 4h at 100 DEG C, obtains the TiO with hollow structure2/ heat-shrinkable polymer composite particles；
2) preparation of high light reflectivity PC membrane materials：Hollow composite particles, PC and dimethicone prepared by step 1) is mixed with high
After machine is well mixed, extruded, be granulated at 280 DEG C with double screw extruder, pellet is dried into 4h at 120 DEG C, is prepared
High light reflectivity PC membrane materials.
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| CN105690701A (en) * | 2016-01-28 | 2016-06-22 | 嘉兴鹏翔包装材料有限公司 | Production method for polyethylene terephthalate (PET) aluminum-plated solar film |
| CN105948528B (en) * | 2016-04-25 | 2019-03-19 | 上海西源新能源技术有限公司 | A kind of high reflection coated glass and preparation method thereof |
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| CN1639248A (en) * | 2002-02-28 | 2005-07-13 | 阿托菲纳公司 | Transparent thermoplastic composition comprising hollow glass beads |
| CN102221718A (en) * | 2010-04-15 | 2011-10-19 | 奇菱科技股份有限公司 | High-reflectivity optical diaphragm and making method thereof |
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