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Reflecting film

A reflective film, graft modification technology, applied in the field of reflective film, can solve the problems of reducing the mechanical properties of the reflective film, reducing the reflectivity of the reflective film, reducing the molecular chain and so on

Active Publication Date: 2014-05-07
ZHANGJIAGANG KANGDE XIN OPTRONICS MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reflectivity of the reflective film prepared by this method can be obviously higher than that of polyethylene terephthalate, but the water absorption of aliphatic polyester is strong, and there will be a process of self-degradation, which will reduce the molecular chain. Reduce the mechanical properties of the reflective film
Therefore, the reflectivity of this reflective film will continue to decrease over time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] combine figure 1 and 2 , the ingredients of the core layer 2 include the following ingredients by weight percentage: PLA79%, 15% of titanium dioxide, and 6% of water resistance agent; Silica masterbatch 10%. The ingredients are added to the corresponding extruder and then melted and plasticized. After the melt is filtered and measured, it is compounded in the die (T-shaped or hanger-shaped), and evenly distributed to each point of the film lip to form a melt film. Head temperature 220°C. The melt film is cooled on the surface of the chilled roller at 25°C to form a diaphragm; the diaphragm is preheated at 68°C, stretched longitudinally at 70°C, and the stretching ratio is 3 times, and cooled at 25°C to obtain a uniaxially stretched film. Stretch film. The longitudinally stretched film is preheated at 90°C, stretched 3.2 times transversely, heat-set at 210°C, relaxed by 4% in the width direction, cooled evenly and slowly, and wound up. Among them, the core layer: 80...

Embodiment 2

[0031] The core layer ingredients contain the following ingredients by weight percentage: PLA79%, titanium dioxide 15%, water resistance agent 6%; the surface layer ingredients include the following ingredients by weight percentage: glycidyl ester graft modified molecular weight bimodal distribution polyethylene 90%, silicon dioxide Masterbatch 10%. The ingredients are added to the corresponding extruder and then melted and plasticized. The melt is filtered and measured, compounded in the die (T-shaped or hanger-shaped), and evenly distributed to each point of the film lip to form a melt film. Head temperature 220°C. The melt film is cooled on the surface of the chilled roller at 25°C to form a diaphragm; the diaphragm is preheated at 68°C, stretched longitudinally at 70°C, and the stretching ratio is 3 times, and cooled at 25°C to obtain a uniaxially stretched film. Stretch film. The longitudinally stretched film is preheated at 90°C, stretched 3.2 times transversely, heat-...

Embodiment 3

[0033]The core layer ingredients contain the following ingredients by weight percentage: PLA79%, titanium dioxide 15%, water resistance agent 6%; the surface layer ingredients include the following ingredients by weight percentage: acrylic acid graft modified molecular weight bimodal distribution polyethylene 90%, silica masterbatch 10%. The ingredients are added to the corresponding extruder and then melted and plasticized. After the melt is filtered and measured, it is compounded in the die (T-shaped or hanger-shaped), and evenly distributed to each point of the film lip to form a melt film. Head temperature 220°C. The melt film is cooled on the surface of the chilled roller at 25°C to form a diaphragm; the diaphragm is preheated at 68°C, stretched longitudinally at 70°C, and the stretching ratio is 3 times, and cooled at 25°C to obtain a uniaxially stretched film. Stretch film. The longitudinally stretched film is preheated at 90°C, stretched 3.2 times transversely, heat-...

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Abstract

The invention discloses a reflecting film of a three-layer structure. The surface layers on the two sides are graft-modified polymers, and the core layer is the mixture of aliphatic polyester and inorganic particles. The graft-modified polymers are graft-modified polycarbonate or polyacrylic acid or polyethylene vinyl acetate or polystyrene or polypropylene or polyethylene; graft-modified perssad is acrylic acid or acrylonitrile or glycidyl ester or maleic anhydride; the aliphatic polyester is polylactic acid or polycaprolactone or poly hydroxy alkyl acid esters; the inorganic particles are one or two or more of calcium carbonate, titanium dioxide, zirconium oxide, zinc oxide, zinc sulfide, lead carbonate and barium sulfate. The graft-modified polymers on the surface layers play a supporting role, the film is prevented from being cracked and folded, the aliphatic polyester is prevented from absorbing water and being degraded due to the high water vapor barrier property, and the film reflecting performance is stable.

Description

technical field [0001] The present invention relates to the technical field of reflective films, in particular to a reflective film used for reflective plates of liquid crystal display devices, lighting fixtures, illuminated billboards, and the like. Background technique [0002] The LCD backlight device is a device that provides light for the liquid crystal layer, and the device includes cold cathode fluorescent lamps, reflective films, light guide plates, diffusion films, prisms, etc. Among them, the reflective film is in contact with the light guide plate to reflect the light generated by the cold cathode fluorescent lamp, which is an indispensable optical film that can save energy. [0003] At present, through the joint efforts of domestic and foreign R & D personnel, the reflection principle of the reflective film has been preliminarily summarized. When light is incident from a material with a refractive index to another material with a refractive index, the interface w...

Claims

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Application Information

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IPC IPC(8): G02B5/08G02B1/00B32B27/08B32B7/04
Inventor 仇植
Owner ZHANGJIAGANG KANGDE XIN OPTRONICS MATERIAL
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