Polymer-based composite structure diffuse reflection material

A polymer-based, composite structure technology, applied in the direction of diffusion elements, etc., can solve the problems of inability to produce lighting effects and low diffuse reflectance

Inactive Publication Date: 2012-07-18
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these directional retroreflective materials have relatively high reflectivity, the warning signs made of reflective film are more eye-catching than other non-reflective materials, and have energy-saving and high-efficiency effects, but the diffuse reflectivity of them is low and cannot produce uniform lighting effects.

Method used

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  • Polymer-based composite structure diffuse reflection material
  • Polymer-based composite structure diffuse reflection material
  • Polymer-based composite structure diffuse reflection material

Examples

Experimental program
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Effect test

Embodiment 1

[0038] Example 1, using the method of co-extrusion micro-imprinting to prepare a composite structure diffuse reflective polymer material, a brief introduction of a polypropylene PP and polyethylene terephthalate PET polymer material with a hemispherical microstructure Preparation of Composite Structures. In the first step, the temperature of the two single-screw extruders is raised separately. The temperature of the first heating zone of the first single-screw extruder is set at 190°C, the temperature of the second heating zone is set at 200°C, and the temperature of the third heating zone is set at Set at 200°C, and set the temperature of the sheet die head at 205°C. For the second single-screw extruder, the temperature of the first heating zone is set at 245°C, the temperature of the second heating zone is set at 250°C, the temperature of the third heating zone is set at 250°C, and the temperature of the sheet die head is set at 260°C. In the second step, when the temperatu...

Embodiment 2

[0039]Example 2 Prepare a composite structure diffuse reflective polymer material by coating, select polypropylene PP as the surface material, the first step is to prepare a surface unit with a microstructure, the specific method is to use an extruder to produce a PP sheet, The temperature of the first heating zone of the single-screw extruder is set at 190°C, the temperature of the second heating zone is set at 200°C, the temperature of the third heating zone is set at 200°C, and the temperature of the sheet die head is set at 205°C. When the temperature of the extruder rises to the set value, the prepared polypropylene PP is added to the screw extruder to extrude the sheet, and the sheet is embossed on the twin rollers with microstructure. At this time, the number of revolutions of the double rollers is set at 100-200r / min, which is more appropriate, so that the surface material with microstructure can be prepared. In the second step, the prepared surface unit is coated with ...

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Abstract

The invention relates to a polymer-based composite structure diffuse reflection material. The material is characterized in that: the diffuse reflection material, which is formed by multi-layer structures, comprises a microstructure surface layer material, a single layer or multi-layer intermediate material and a reflecting layer material. Specifically, the surface microstructure is a microlens array having a linear or non-linear geometrical characteristic; and the surface microstructure is in a microgroove type, a ball type, an ellipsoid type, a polygonal type, a paraboloidal type, a hyperboloidal type or a combined type. According to the invention, the prepared diffuse reflection high polymer material with the composite structure has advantages of high reflectivity and good diffuse reflection effect.

Description

Technical field: [0001] Polymer matrix composites, polymer material processing, micro-nano manufacturing. Background technique: [0002] With the advancement of science and technology and the improvement of living standards, people have higher and higher requirements for environmental comfort. At present, most of the reflective materials used are aluminum, copper, nickel, chromium and other metal materials or metal-plated plastic surfaces. In this case, if the light source is a point light source, this reflective material will form a specular reflection, which is prone to problems such as glare and uneven illumination. Moreover, the oxidation of the metal material will also reduce the reflection efficiency. As a new type of light source, LED is currently widely used in various fields, including display and various lighting occasions. Compared with ordinary light sources, white light LEDs for lighting are characterized by their small size but ultra-high brightness and direct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/02
Inventor 刘颖计红艳吴大鸣郑秀婷赵忠里许红何晓祥罗祎玮姜辉
Owner BEIJING UNIV OF CHEM TECH
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