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Reflection film and preparation method thereof

A technology of film and reflective layer, applied in the field of reflective film and its preparation, can solve problems such as scratches on light guide plates, and achieve the effects of improving brightness, good optical performance, and brightness enhancement

Active Publication Date: 2015-06-17
NINGBO CHANGYANG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the surface of the existing reflective film is relatively smooth, the light guide plate will be stuck to the light guide plate during the use of the backlight module, and the light guide plate will be scratched, and the reflection characteristics of the reflective film can be further improved, thereby increasing the brightness of the backlight source. The present invention provides A reflective film (or optical reflective film, referred to as reflective film)

Method used

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  • Reflection film and preparation method thereof
  • Reflection film and preparation method thereof
  • Reflection film and preparation method thereof

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preparation example Construction

[0039] The preparation method of the reflective film provided by the present invention comprises the following steps (the following contents are all weight percentages):

[0040] (1) Preparation process of diffusion masterbatch

[0041] The production method is: mixing organic microbeads, dispersant, coupling agent, diluent and antioxidant, and granulating through a twin-screw extruder; the dosage of additives is shown in Table 1.

[0042] Table 1 additive dosage

[0043] Additives

coupling agent

Dispersant

antioxidant

Thinner

Dosage (%)

0.5-6

1-2

0.5-2

0.5-6

[0044] (2) Preparation of molten mixture

[0045] Auxiliary extruder: mix and feed polyester bright slices and 10-50% diffusion masterbatch slices through a weight loss scale, and extrude to obtain a molten mixture for the diffusion layer;

[0046] Main extruder: add 5-20% BaSO 4 The PP masterbatch (or other resin masterbatch containing inorganic particles) is ...

Embodiment 1

[0059] Prepare an optical reflection film according to the aforementioned method, wherein the particle diameters of the light-diffusing particles are 2 μm and 8 μm, respectively accounting for 50% of the total weight of the light-diffusing particles, and then mix and granulate the diffusion particles with polyester materials and additives to prepare diffusion masterbatches , the diffusion masterbatch includes 10% diffusion particles, 1.5% dispersant, 3% coupling agent, 2.5% diluent, 1% antioxidant, and 82% polyester material. The obtained diffusion masterbatch is mixed with 70% polyester base material in the addition amount of 30%, and melted and extruded through the auxiliary extruder; the BaSO-containing 4 The PP masterbatch is mixed with 80% polyester base material in an additive amount of 20%, and melted and extruded through the main extruder; roll, prepare the optical reflection film provided by the present invention, the performance of the obtained film is shown in Table...

Embodiment 2

[0061] Prepare the optical reflection film according to the aforementioned method, wherein the light-diffusing particles are organic silicon, and the particle diameters are 2 μm and 8 μm, respectively accounting for 50% of the total weight of the light-diffusing particles; the diffusion masterbatch includes 10% of the diffusion particles, 1% of the dispersed agent, 0.5% coupling agent, 0.5% thinner, 0.5% antioxidant, and 87.5% polyester material. The resulting diffusion masterbatch is mixed with 90% polyester base material in an additive amount of 10%, extruded through an auxiliary extruder to prepare a diffusion layer; 3 The TPU masterbatch is mixed with 90% of the polyester base material in an amount of 10%, extruded through the main extruder to prepare the reflective layer; Prepare the optical reflective film provided by the present invention, and the properties of the obtained film are shown in Table 2.

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Abstract

The invention relates to the technical field of optical films, and especially relates to a reflection film and a preparation method thereof. The invention provides the reflection film in order to solve the problems that the conventional reflection films have more smooth surfaces, and are adhered to a light guide plate and cause scratch on the light guide plate when a backlight module is used, and in order to further improve the reflection characteristic of the reflection film. The film has a three-layer structure, wherein the interlayer is a reflection layer, and the two sides of the reflection layer are disposed diffusion layers; each diffusion layer comprises 10-50 wt% of a diffusion master batch, and a polyester raw material; and the reflection layer comprises 5-20 wt% of a resin masterbatch containing inorganic particles, and a polyester raw material. Because of organic diffusion particles added into the surface layer, the product of the invention is effectively reduced in surface gloss, has certain smoothness, and is capable of better protecting the light guide plate and avoiding scratch on the light guide plate; and the preparation method is simple in technology and easy to operate.

Description

technical field [0001] The invention relates to the technical field of optical thin films, in particular to a reflective thin film and a preparation method thereof. Background technique [0002] The backlight system used in flat panel displays is mainly composed of light sources, light guide plates, and various optical films, among which the main optical films include diffusion films, brightness enhancement films and reflective films, such as Figure 5 shown. Among them, the main function of the reflective film is to reflect the light leaking out of the bottom of the light guide plate efficiently and without loss, thereby reducing light loss, reducing power consumption, and improving the light saturation of the liquid crystal display surface. [0003] In addition to reflectors for flat display devices, reflective films can also be used in the fields of projection screens for projection or components of planar light sources, reflectors for lighting equipment, and reflectors f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/08B32B27/18B32B27/36B32B27/32B32B27/40C08L67/02C08L67/00C08L33/12C08L25/06C08L77/00C08K3/36C08K3/22C08K3/26C08K3/30C08K3/32
Inventor 不公告发明人
Owner NINGBO CHANGYANG TECH
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