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Preparing method of PDLC (polymer dispersed liquid crystal) dimming glass film

A light-adjustable glass film and thin film technology, which is applied in optics, nonlinear optics, instruments, etc., can solve the problems of high cost and difficult glass film production process, and achieve the effect of increasing yield and reducing production cost

Inactive Publication Date: 2015-07-15
李林
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the production process of the glass film with the above indicators is not easy to realize, or the cost is relatively high

Method used

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  • Preparing method of PDLC (polymer dispersed liquid crystal) dimming glass film
  • Preparing method of PDLC (polymer dispersed liquid crystal) dimming glass film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Embodiment one: resin content is 20%, because resin content drops, other two monomers will increase, hydroxypropyl methacrylate increases to 35%, o-phenylphenoxyethyl acrylate 35%, photoinitiator 5%, lauryl methacrylate 5%, mixed with 65% liquid crystal.

[0040] The result is:

[0041] First: due to the decrease of the resin and the decrease of the adhesiveness, it is easy to open the glue between the two layers of ITO;

[0042] Second: The content of o-phenylphenoxyethyl acrylate increases, causing the refractive index of the polymer to be greater than that of the liquid crystal, which will cause the light transmittance of the PDLC to decrease after the saturation voltage is applied.

Embodiment 2

[0043] Embodiment two: the hydroxypropyl methacrylate content drops to 15%, and the resin content increases to 45%, while o-phenylphenoxyethyl acrylate 30%, photoinitiator and lauryl methacrylate content are constant, then Then mix with 65% liquid crystal.

[0044] The result is:

[0045] First: the viscosity of the resin increases to be greater than that of the liquid crystal, and the grid in the polymer where the liquid crystal is precipitated after curing is too dense, and the voltage increases significantly. In addition, the low content of hydroxyacrylic acid is also the main reason for the high voltage.

[0046] Second: the refractive index of the prepolymer and the liquid crystal do not match, and the on-state transmittance decreases.

Embodiment 3

[0047] Embodiment three: the o-phenylphenoxyethyl acrylate content is reduced by 15%, the resin content does not increase and is still 40%, the hydroxypropyl methacrylate content increases to 35%, and the photoinitiator and lauryl methacrylate content do not increase. Change, and then mix with 65% liquid crystal.

[0048] The result is:

[0049] The refractive index of polymer is smaller than that of liquid crystal, and the light transmittance increases with the increase of voltage and there is never an optimal transmittance platform. It is a recipe for failure.

[0050] The preparation process of PDLC dimming glass film is as follows:

[0051] Step d, coating and pressing;

[0052] Please combine figure 1 As shown, the raw materials are added to the coating press machine, and the feeding tank 1 on the coating press machine evenly coats the raw materials in the middle of two layers of ITO films 2, so that the pressing distance is 20um, and the raw materials are coated with t...

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Abstract

The invention relates to a preparing method of a PDLC (polymer dispersed liquid crystal) dimming glass film. The method particularly comprises the following steps that in a light shading environment, resin, photoinitiators, HPMA (hydroxypropyl methacrylate), OPPEA (ortho-phenyl phenoxyl ethyl acrylate) and LMA (lauryl methacrylate) are proportionally mixed; after the mixing, the materials are uniformly stirred for about 30 minutes at the room temperature being about 25 DEG C; a mixture A is obtained; 35 percent of the mixture A is mixed with 65 percent of liquid crystals, and the mixture is uniformly stored for about 30 minutes at the room temperature about 25 DEG C; a mixture B is obtained; 0.5-percent 20um nanometer materials are added to be mixed with the mixture B, and the mixture is uniformly stirred for about 30 minutes at the room temperature being about 25 DEG C; finally, PDLC raw materials are obtained; coating and pressing are carried out; the curing process is carried out. The method provided by the invention includes the PDLC raw material preparation and a film production method. The production cost of the PDLC film is greatly reduced.

Description

technical field [0001] The invention relates to the field of glass film preparation, in particular to a method for preparing a PDLC dimming glass film. Background technique [0002] At present, the market has no specific national standards for PDLC and the products it manufactures, such as dimming glass, and each manufacturer can only approach the best product quality standard according to its own production process level, the main hard indicators, open-state transmittance The higher the better, the best transmittance of the front light-adjusting film is about 80% at most, the more opaque the off state, the better, and the best transmittance in the off state is about 5%. In addition, low voltage, high switching times, good bonding of two layers of ITO, not easy to open the glue, good bonding between PDLC and glass, no bubbles, etc., are the main hard indicators to measure the quality of the switchable glass. [0003] However, the production process of the glass film with th...

Claims

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Application Information

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IPC IPC(8): G02F1/1334C09J4/02
CPCC09J4/00C09J4/06C09J11/06G02F1/1334C08F220/281
Inventor 李林
Owner 李林
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