CN112708215A - Foaming type multifunctional composite board and preparation method thereof - Google Patents
Foaming type multifunctional composite board and preparation method thereof Download PDFInfo
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- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
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- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
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Abstract
The invention discloses a foaming type multifunctional composite board and a preparation method thereof, and the foaming type multifunctional composite board comprises the following components in percentage by mass: 96-98% of main material matrix resin, 0.3-0.6% of light diffusant, 0.15-0.3% of antioxidant, 0.05-0.10% of dispersant/lubricant, 1.0-2.0% of foaming agent, 0.05-0.1% of foaming auxiliary agent and 0.4-1.0% of foaming regulator. The light diffusion plate prepared by the invention is added with components such as foaming agent, foaming auxiliary agent and the like, and the product is foamed to form the spherical refractor, so that the density of the light diffusion plate becomes smaller, the light diffusion plate is lighter in weight, the dense spherical refractor is favorable for further detaching and reflecting light, the diffusion effect is enhanced, the brightness of a display light source is effectively improved, the haze is increased, the cost is saved, and the foamed multifunctional composite plate has better stiffness and higher surface hardness.
Description
Technical Field
The invention belongs to the field of photoelectric materials, and particularly relates to a foaming type multifunctional composite plate for a backlight display device and a preparation method thereof.
Background
In the lcd, the lcd panel itself does not have a light emitting function, and a backlight module is disposed below the lcd panel to provide a light source, so as to achieve a display function. The diffusion plate is a key part in the direct type LED backlight module, and mainly has the functions of diffusing point light sources or line light sources into uniform surface light sources, improving the utilization rate of light energy in the direction parallel to the light propagation direction, and improving the light emitting efficiency and the light emitting uniformity to achieve the purpose of high-quality display. The diffusion plate used in the direct type display screen backlight source needs to have good optical performance, including light dispersion performance, refraction performance and penetrating radiation performance, in the prior art, concave-convex points or four-point stripes are processed on one surface or two surfaces of the diffusion plate, the diffusion plate is used for improving the light dispersion performance of the diffusion plate, and light rays emitted by LED light strip point-shaped light sources can be homogenized after being emitted through the diffusion plate; in addition, in the prior art, the existing light diffusion plate is a transparent plate formed by single-layer extrusion of single components such as PS, PC, PMMA and the like, and is relatively heavy, thereby increasing the weight of the display screen virtually and increasing the cost of the light diffusion plate.
Disclosure of Invention
In view of the above, in order to solve the above technical problems, the present invention provides a foamed multifunctional composite board, which is improved from the aspects of structure, raw material formula, preparation process, and the like, by adding components such as a foaming agent, a foaming aid, and the like, and the product is foamed to form spherical refractors, so that the density of the light diffusion plate becomes smaller, the light diffusion plate is lighter in weight, and the densely distributed spherical refractors are favorable for further detaching and reflecting light, so as to enhance the diffusion effect, effectively improve the luminance of a display light source, increase the haze, save the cost, and have better stiffness and higher surface hardness.
In order to solve the problems, the technical scheme adopted by the invention is as follows:
a foamed multifunctional composite board comprises the following components in percentage by mass:
96-98% of main material matrix resin
0.3 to 0.6 percent of light diffusant
0.15 to 0.3 percent of antioxidant
0.05 to 0.10 percent of dispersant/lubricant
1.0 to 2.0 percent of foaming agent
0.05 to 0.1 percent of foaming auxiliary agent
0.4 to 1.0 percent of foaming regulator.
Wherein the main material matrix resin is polystyrene, commonly known as PS; the light diffusant is an organic silicon light diffusant; the antioxidant comprises: antioxidant 168, antioxidant 1076; the dispersant/lubricant is EBS wax, and the main component of the dispersant/lubricant is N, N' -ethylene bis stearamide; the foaming auxiliary agent is sodium dodecyl benzene sulfonate; the foaming regulator is acrylate polymer.
Further, the antioxidant 168 mass content is 0.1-0.2%, and the antioxidant 1076 mass content is 0.05-0.1%.
Further, the particle size of the light diffusion agent is about 500 nanometers to 1.2 microns.
Furthermore, the foaming agent is a physical foaming agent and is one or more of supercritical carbon dioxide, water, fluorocarbon and the like, and the foaming agent volatilizes after foaming and has no residue.
Further, the foaming agent is a chemical foaming agent, azodicarbonamide (foaming agent AC) is selected and compounded with related regulator, dispersant, active agent and the like.
Further, the cells of the cell structure formed after foaming are oval and have the size of about (150 and 200 microns) to about (30-70 microns).
Further, the antioxidant 168 is tris (2,4(2, 4-di-tert-butyl) phenyl phosphite, and the antioxidant 1076 is n-octadecyl 3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate.
Further, the invention also discloses a preparation method of the foaming type multifunctional composite board, which comprises the following steps:
(1) the materials of the components are mixed and stirred to be uniformly mixed, then are respectively put into double-screw extruders with different calibers for heating and extrusion, and are distributed by a distributor after being extruded;
(2) the uniformly distributed mixed material is heated and extruded to form through a special die head die;
(3) and (3) directly feeding the extruded plastic plate into a shaping mold, cooling the extruded plastic plate in the shaping mold by water, wherein the demolding temperature is normal temperature, and cutting the extruded plastic plate according to the size requirement to obtain the foamed multifunctional composite plate.
Further, the rotating speed of the double-screw extruder in the step (1) is 20r/min, the double-screw extruder is divided into five heating zones, and the heating temperature is gradually reduced by 5 ℃ from the first zone to the fifth zone.
Further, in the step (2), adding a mixed material from a special die head die, wherein a die lip of the special die head die is provided with an oil temperature hole, and a die temperature controller is matched for controlling the temperature of the die lip; the temperature of the middle part in the special die head die is 170-200 ℃, and the temperature of the two sides is 200-220 ℃.
Further, the density of the prepared foaming type multifunctional composite board is 0.1-0.8 g/cm3。
Compared with the prior art, the invention has the following technical advantages:
(1) the multifunctional composite board prepared by the invention is added with the components such as the foaming agent, the foaming auxiliary agent and the like, and the product is foamed to form the spherical refractor, so that the density of the multifunctional composite board becomes smaller, the multifunctional composite board is lighter in weight, the dense spherical refractor is favorable for further detaching and reflecting light, the diffusion effect is enhanced, the luminance of a display light source is effectively improved, the haze is increased, the cost is saved, and the foamed multifunctional composite board has better stiffness and higher surface hardness;
(2) the invention changes the optical performance of the diffusion plate in the diffusion plate, and leads the chemical polymers with different refractive indexes in the diffusion plate to be dispersed uniformly instead of being changed from the surface, the process is simple, the implementation is easy, and the produced diffusion plate has excellent optical performance;
(3) when the multifunctional composite board is prepared, the multifunctional composite board is formed at one time, does not need to be pressed, is tightly connected and has long service life.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the invention. All falling within the scope of the present invention.
For better understanding of the technical scheme of the invention, the component materials mentioned in the scheme of the invention are selected as follows for illustration: the main material matrix resin is polystyrene commonly known as PS; the light diffusant is an organic silicon light diffusant; the antioxidant comprises: the foaming agent comprises an antioxidant 168 and an antioxidant 1076, wherein the antioxidant 168 is tris (2,4(2, 4-di-tert-butyl) phenyl phosphite, the antioxidant 1076 is 3- (3, 5-di-tert-butyl-4-hydroxyphenyl) N-octadecyl propionate, the dispersing agent/lubricating agent is EBS wax, the main component of the EBS wax is N, N' -ethylene bis stearamide, the foaming auxiliary agent is sodium dodecyl benzene sulfonate commonly known as SDBS, the foaming regulator is an acrylate polymer, the foaming agent is a chemical foaming agent, and azodicarbonamide (foaming agent AC) is selected and compounded with related regulators, dispersing agents, active agents and the like.
Example 1:
a foamed multifunctional composite board comprises the following components in percentage by mass:
polystyrene (PS) 96%
0.6 percent of organic silicon photodiffusion agent
1680.2 percent of antioxidant
10760.05 percent of antioxidant
0.1 percent of EBS wax
2.0 percent of foaming agent AC
SDBS 0.05%
1.0% of acrylate polymer.
The preparation method of the foamed multifunctional composite board comprises the following steps:
(1) the materials of the components are mixed and stirred to be uniformly mixed, then are respectively put into double-screw extruders with different calibers for heating and extrusion, and are distributed by a distributor after being extruded; the rotating speed of the double-screw extruder is 20r/min, the double-screw extruder is divided into five heating areas, and the heating temperature is gradually reduced by 5 ℃ from the first area to the fifth area;
(2) the uniformly distributed mixed material is heated and extruded to form through a special die head die; adding a mixed material from a special die head die, wherein a die lip of the special die head die is provided with an oil temperature hole, and a die temperature controller is matched for controlling the temperature of the die lip; the temperature of the middle part in the special die head die is 170-200 ℃, and the temperature of the two sides is 200-220 ℃;
(3) and (3) directly feeding the extruded plastic plate into a shaping mold, cooling the extruded plastic plate in the shaping mold by water, wherein the demolding temperature is normal temperature, and cutting the extruded plastic plate according to the size requirement to obtain the foamed multifunctional composite plate.
The density of the prepared foaming type multifunctional composite plate is 0.1-0.8 g/cm 3;
the particle size of the light diffusion agent is about 500 nanometers to 1.2 micrometers;
the foam forms a cell structure with oval cells with a size of about (150-200 microns) to (30-70 microns).
Example 2:
a foamed multifunctional composite board comprises the following components in percentage by mass:
polystyrene (PS) 96%
0.6 percent of organic silicon photodiffusion agent
1680.2 percent of antioxidant
10760.1 percent of antioxidant
EBS wax 0.05%
2.0 percent of foaming agent AC
SDBS 0.05%
1.0% of acrylate polymer.
The preparation method of the foamed multifunctional composite board comprises the following steps:
(1) the materials of the components are mixed and stirred to be uniformly mixed, then are respectively put into double-screw extruders with different calibers for heating and extrusion, and are distributed by a distributor after being extruded; the rotating speed of the double-screw extruder is 20r/min, the double-screw extruder is divided into five heating areas, and the heating temperature is gradually reduced by 5 ℃ from the first area to the fifth area;
(2) the uniformly distributed mixed material is heated and extruded to form through a special die head die; adding a mixed material from a special die head die, wherein a die lip of the special die head die is provided with an oil temperature hole, and a die temperature controller is matched for controlling the temperature of the die lip; the temperature of the middle part in the special die head die is 170-200 ℃, and the temperature of the two sides is 200-220 ℃;
(3) and (3) directly feeding the extruded plastic plate into a shaping mold, cooling the extruded plastic plate in the shaping mold by water, wherein the demolding temperature is normal temperature, and cutting the extruded plastic plate according to the size requirement to obtain the foamed multifunctional composite plate.
The density of the prepared foaming type multifunctional composite plate is 0.1-0.8 g/cm 3;
the particle size of the light diffusion agent is about 500 nanometers to 1.2 micrometers;
the foam forms a cell structure with oval cells with a size of about (150-200 microns) to (30-70 microns).
Example 3:
a foamed multifunctional composite board comprises the following components in percentage by mass:
polystyrene (PS) 98%
0.3 percent of organic silicon photodiffusion agent
1680.1 percent of antioxidant
10760.05 percent of antioxidant
EBS wax 0.05%
Foaming agent AC1.0%
SDBS 0.1%
0.4% of acrylate polymer.
The preparation method of the foamed multifunctional composite board comprises the following steps:
(1) the materials of the components are mixed and stirred to be uniformly mixed, then are respectively put into double-screw extruders with different calibers for heating and extrusion, and are distributed by a distributor after being extruded; the rotating speed of the double-screw extruder is 20r/min, the double-screw extruder is divided into five heating areas, and the heating temperature is gradually reduced by 5 ℃ from the first area to the fifth area;
(2) the uniformly distributed mixed material is heated and extruded to form through a special die head die; adding a mixed material from a special die head die, wherein a die lip of the special die head die is provided with an oil temperature hole, and a die temperature controller is matched for controlling the temperature of the die lip; the temperature of the middle part in the special die head die is 170-200 ℃, and the temperature of the two sides is 200-220 ℃;
(3) and (3) directly feeding the extruded plastic plate into a shaping mold, cooling the extruded plastic plate in the shaping mold by water, wherein the demolding temperature is normal temperature, and cutting the extruded plastic plate according to the size requirement to obtain the foamed multifunctional composite plate.
The density of the prepared foaming type multifunctional composite plate is 0.1-0.8 g/cm 3;
the particle size of the light diffusion agent is about 500 nanometers to 1.2 micrometers;
the foam forms a cell structure with oval cells with a size of about (150-200 microns) to (30-70 microns).
Example 4:
a foamed multifunctional composite board comprises the following components in percentage by mass:
polystyrene (PS) 97%
0.4 percent of organic silicon photodiffusion agent
1680.15 percent of antioxidant
10760.05 percent of antioxidant
EBS wax 0.10%
Foaming agent AC1.5%
SDBS 0.1%
0.7 percent of acrylate polymer.
The preparation method of the foamed multifunctional composite board comprises the following steps:
(1) the materials of the components are mixed and stirred to be uniformly mixed, then are respectively put into double-screw extruders with different calibers for heating and extrusion, and are distributed by a distributor after being extruded; the rotating speed of the double-screw extruder is 20r/min, the double-screw extruder is divided into five heating areas, and the heating temperature is gradually reduced by 5 ℃ from the first area to the fifth area;
(2) the uniformly distributed mixed material is heated and extruded to form through a special die head die; adding a mixed material from a special die head die, wherein a die lip of the special die head die is provided with an oil temperature hole, and a die temperature controller is matched for controlling the temperature of the die lip; the temperature of the middle part in the special die head die is 170-200 ℃, and the temperature of the two sides is 200-220 ℃;
(3) and (3) directly feeding the extruded plastic plate into a shaping mold, cooling the extruded plastic plate in the shaping mold by water, wherein the demolding temperature is normal temperature, and cutting the extruded plastic plate according to the size requirement to obtain the foamed multifunctional composite plate.
The density of the prepared foaming type multifunctional composite plate is 0.1-0.8 g/cm 3;
the particle size of the light diffusion agent is about 500 nanometers to 1.2 micrometers;
the foam forms a cell structure with oval cells with a size of about (150-200 microns) to (30-70 microns).
Example 5:
a foamed multifunctional composite board comprises the following components in percentage by mass:
polystyrene (PS) 98%
0.3 percent of organic silicon photodiffusion agent
1680.1 percent of antioxidant
10760.05 percent of antioxidant
EBS wax 0.10%
Foaming agent AC1.0%
SDBS 0.05%
0.4% of acrylate polymer.
The preparation method of the foamed multifunctional composite board comprises the following steps:
(1) the materials of the components are mixed and stirred to be uniformly mixed, then are respectively put into double-screw extruders with different calibers for heating and extrusion, and are distributed by a distributor after being extruded; the rotating speed of the double-screw extruder is 20r/min, the double-screw extruder is divided into five heating areas, and the heating temperature is gradually reduced by 5 ℃ from the first area to the fifth area;
(2) the uniformly distributed mixed material is heated and extruded to form through a special die head die; adding a mixed material from a special die head die, wherein a die lip of the special die head die is provided with an oil temperature hole, and a die temperature controller is matched for controlling the temperature of the die lip; the temperature of the middle part in the special die head die is 170-200 ℃, and the temperature of the two sides is 200-220 ℃;
(3) and (3) directly feeding the extruded plastic plate into a shaping mold, cooling the extruded plastic plate in the shaping mold by water, wherein the demolding temperature is normal temperature, and cutting the extruded plastic plate according to the size requirement to obtain the foamed multifunctional composite plate.
The density of the prepared foaming type multifunctional composite plate is 0.1-0.8 g/cm 3;
the particle size of the light diffusion agent is about 500 nanometers to 1.2 micrometers;
the foam forms a cell structure with oval cells with a size of about (150-200 microns) to (30-70 microns).
And (3) performance testing:
the performance of the foamed multifunctional composite boards prepared in examples 1 to 5 of the present invention was tested, and compared with a common diffuser plate, the results of the tests for the foamed multifunctional composite boards of the examples are shown in the following table:
example and general diffuser plate test comparison
According to the test results, the following test results are obtained: the foaming type multifunctional composite board prepared by the scheme of the invention has excellent performance in the aspects of color gamut, brightness, visual effect and other performance tests, and the product has good stiffness and stability: the density of the foaming type multifunctional composite board becomes smaller, the light diffusion plate is lighter in weight, the densely distributed spherical refractors are favorable for further detaching and reflecting light, the diffusion effect is enhanced, the brightness of a display light source is effectively improved, the haze is increased, the cost is saved, the stiffness of the foaming type multifunctional composite board is better, and the surface hardness is higher.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (10)
1. A foaming type multifunctional composite board is characterized in that: the composite material comprises the following components in percentage by mass:
96-98% of main material matrix resin
0.3 to 0.6 percent of light diffusant
0.15 to 0.3 percent of antioxidant
0.05 to 0.10 percent of dispersant/lubricant
1.0 to 2.0 percent of foaming agent
0.05 to 0.1 percent of foaming auxiliary agent
0.4 to 1.0 percent of foaming regulator.
2. The foamed multifunctional composite board according to claim 1, wherein: the main material matrix resin is polystyrene commonly known as PS; the light diffusant is an organic silicon light diffusant; the antioxidant comprises: antioxidant 168, antioxidant 1076; the dispersant/lubricant is EBS wax, and the main component of the dispersant/lubricant is N, N' -ethylene bis stearamide; the foaming auxiliary agent is sodium dodecyl benzene sulfonate; the foaming regulator is acrylate polymer.
3. A foamed multifunctional composite board according to claim 2, characterized in that: the antioxidant 168 is tris (2,4(2, 4-di-tert-butyl) phenyl phosphite, the antioxidant 1076 is 3- (3, 5-di-tert-butyl-4-hydroxyphenyl) n-octadecyl propionate, the mass content of the antioxidant 168 is 0.1-0.2%, and the mass content of the antioxidant 1076 is 0.05-0.1%.
4. A foamed multifunctional composite board according to claim 2, characterized in that: the particle size of the light diffusion agent is about 500 nanometers to 1.2 microns.
5. The foamed multifunctional composite board according to claim 1, wherein: the foaming agent is a physical foaming agent, is one or more of supercritical carbon dioxide, water, fluorocarbon and the like, and is volatilized without residue after foaming.
6. The foamed multifunctional composite board according to claim 1, wherein: the foaming agent is a chemical foaming agent, azodicarbonamide (foaming agent AC) is selected and compounded with related regulator, dispersant, active agent and the like.
7. The foamed multifunctional composite board according to claim 1, wherein: the foam forms a cell structure with oval cells with a size of about (150-200 microns) to (30-70 microns).
8. A method of making an expanded multifunctional composite panel according to claim 1, comprising the steps of:
(1) the materials of the components are mixed and stirred to be uniformly mixed, then are respectively put into double-screw extruders with different calibers for heating and extrusion, and are distributed by a distributor after being extruded;
(2) the uniformly distributed mixed material is heated and extruded to form through a special die head die;
(3) and (3) directly feeding the extruded plastic plate into a shaping mold, cooling the extruded plastic plate in the shaping mold by water, wherein the demolding temperature is normal temperature, and cutting the extruded plastic plate according to the size requirement to obtain the foamed multifunctional composite plate.
9. The method of claim 8 for making an intumescent multifunctional composite sheet, wherein: the rotating speed of the double-screw extruder in the step (1) is 20r/min, the double-screw extruder is internally divided into five heating areas, and the heating temperature is gradually reduced by 5 ℃ from the first area to the fifth area;
in the step (2), adding a mixed material from a special die head die, wherein a die lip of the special die head die is provided with an oil temperature hole, and a die temperature controller is matched for controlling the temperature of the die lip; the temperature of the middle part in the special die head die is 170-200 ℃, and the temperature of the two sides is 200-220 ℃.
10. The method of claim 8 for making an intumescent multifunctional composite sheet, wherein: the density of the prepared foaming type multifunctional composite board is 0.1-0.8 g/cm 3.
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