JPS6215501A - Production of optical filter - Google Patents

Abstract

PURPOSE:To make the removal of a solid polymer film having a cholesteric liquid crystal structure obtd. by photopolymerizing from a substrate composed of a high polymer film easily by using the high polymer film as the translucent substrate. CONSTITUTION:The titled optical filter is produced by interposing the cholesteric liquid crystal composed of a mixed solution of a polypeptide compd. and a photopolymerizable monomer between a pair of the translucent substrates. Namely, the translucent substrates comprises the high polymer film and interposes the cholesteric liquid crystal there-between. After plate-orientation, the solid polymer film is obtd.by performing the optical polymerization, and the removing from the high polymer film substrate, whereby the solid polymer film having the uniform cholesteric liquid crystal structure which is the optical filter is obtd. As the high polymer film has a flexibility, said film can be removed from the prescribed substrate, without applying an unreasonable force to the polymer film, whereby the high polymer film having a good surface condition is obtd.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to optical filters used in displays, optoelectronics, etc., such as optical notch filters, bandpass filters, and color filters.

The present invention relates to a method for manufacturing an optical filter that can be applied to manufacturing original isolators.

[Prior Art] It has been well known that Lesteric liquid crystals exhibit optical properties such as selective light scattering, optical rotation, and monocircular dichroism. A technique has been invented in which the optical properties of cholesteric liquid crystals are applied to nine-notch filters and bandpass filters (Japanese Patent Publication No. 63-2330). The cholesteric liquid crystal film used in this invention is made of a disintegrating solvent for cholesteric liquid crystal compositions (e.g., ``I 11 hol'', ``I 11 hol'', ``I 11 hol,'' etc.).
After the bath is finished, it is developed into a film L2, and then heated to a temperature above the eddy current (usually 60"C+L2), where the liquid crystal component transforms into a liquid liquid (usually 60"C+L2), and the organic bath agent component is : evaporate and surface-bond C1/Stelink liquid crystal component -) to form C1 normal I'11, +'t, i+i<77
．． 1. Fill 1 with 1B and steric liquid crystal structure
1 and 1- children were obtained. The helical pips of this Rusdelisok dk product film are essentially temperature, i”t::,
): +, -・1 change due to external stimuli such as electrogastric, magnetic field, chemical vapor, and ultraviolet rays. Shidaga -) -C1 This filter is used for optical horn 'f filters, etc./Komeni l
-11. A constant temperature bath is required to keep the temperature constant, and a protective film to protect the water and chemical vapors such as alcohol from the incoming air. (glass plate, etc.) is ・1′/・piece, and furthermore, the fill 7
・1. Adhesive (due to its presence, a protective film is required to protect it from foreign substances such as dust and insects.) What disadvantages? 11-. was.

Next, a stable one-piece filter and 1-7 are 1 to 1 in practical use.
The method for manufacturing a controllable liquid crystal display was invented (tl.-/ko (11) Kaimei 56-139506 Bow Publication). Rusvlinok d-crystal noilt is a liquid crystal made of a 1/1 degree solution of colesbric liquid crystal compound 4) and a compound having a heavy unsaturated group. Polymerized with translucent C1 plate -1-r, Col.
/ Svrinok liquid crystal structure is a fixed solid poly film (the helical pitch of the film is temperature, -) Il
′:, ¥[); 1 for column stimulation with field. −． -7T mastery-r Yasu.

4 Problems to be Solved by the Invention In this way, the cholesteric liquid crystal structure is fixed in a solid polymer. Toru C
'l': A base plate is required, so remove it with 2 steps and fill 7 with all dimensions. In the case of 1JA using a glass substrate as in the conventional example, it takes a long time to remove a large film from the gold glass substrate. If you try to remove the film 7 from the entire glass substrate in a short period of time, the surface of the film will be scratched and the mechanical properties will deteriorate.

The present invention is capable of producing all four films, making it difficult to easily remove the polymer film and substrate from the produced film, and producing a film that uniformly has the following four properties. The 11th objective is to provide a manufacturing method that can make this possible.

Means to Solve the Problems In the present invention, a liquid crystal liquid crystal consisting of a mixed bath solution of a polypeptide compound and a monomer is placed between two sheets of translucent and transparent liquid crystals. , 1.1+ on the board
and manufacture a likelihood filter. -J, that is, transparent light 1-1
After sandwiching the polymer fill 7, gold layer, and cholesderic liquid crystal between the substrates and aligning the substrate, )'14Φ
After performing the polymerization, the substrate is peeled off and a solid polymer film with a homogeneous liquid crystal structure, which is a solid polymer film z k (!), is processed in this way. A solid polymer film with a cholesteric liquid crystal structure can be easily removed without adhesion to a substrate.

The polymer film is flexible; if excessive force is applied to the polymer film, it can peel off, and the surface condition is good. It is thought that I will be able to do it.

EXAMPLES The liquid crystal raw material used in the method for producing Ilta (the theory of the present invention) is a polypeptide compound, and! Polyacidic amino acids or polyacidic amino acid ester derivatives are particularly useful. Acidic amino acids include the 31Φ classes of aspartic acid, curtamic acid, and glutamic acid. Nisdel derivatives such as acidic amino acid methyl ester, ethyl nisdel, bu1] birnysdel, etc.
-L, plastic ball stell.

There are many substances such as Pembrol 1 sprue, Hegysil sprue, Ncrohegisyl esder, Benzyl sulfate, and Chlorobenzyl nisdel. Polyacidic amino acids or polyacidic amino acid Nisdel derivatives obtained by polymerizing these acidic amino acids and their derivatives are used as raw materials for liquid crystals.

Photopolymerization in molten glass 4<Tomotsuma is (meth)a7
．． 7 Contains acrylic ester or its derivatives, such as methyl acrylate, methyl acrylate, methyl methacrylate, cyclohexyl acrylate, ethylene glycol dimethacrylate, diethylene glycol dimethacrylate, triethylene glycol dimethacrylate, etc.

As the polymer film substrate, a polymer film that does not contain (meth)acrylic acid ester or its derivatives is preferable, and it is desirable that it has light transmittance, has strength as a substrate, and does not affect the characteristics of the optical filter. . For example, polypropylene.

These include polyethylene, polyvinyl chloride, polystyrene polyvinylidene chloride, polyamide, polycarbonate, and vinyl acetate. Polymer film substrates range from several μm to several tens of micrometers
It is desirable to use a film with a thickness of 0.77 m, and if the film is thin, it may be manufactured using an auxiliary substrate or the like in addition to the polymer film.

When a polymer film is used as a substrate, continuous production by winding up a roll or the like is possible, and it is possible to make a large film.

The optical characteristics obtained by measuring the spectrophotometric spectrum of the optical filter manufactured according to the present invention are as shown in the figure.
Selectively reflected wavelength λmaX I half-normal width Δλ, λwa
The optical density at x is large except for m1LX1λwax. , and■-mu1na! -People. were determined and evaluated.

Example 1 Weighed 60% by weight of polyurethane glutamic acid-n-butyl ester as a liquid crystal material and 50% by weight of triethylene glycol dimethacrylate as a photopolymerizable monomer.
Both were sufficiently stirred while maintaining the temperature at 6 to 4 Q'c. The uniform liquid crystal solution obtained in this way was 100A1+1
It was sandwiched between two 16 μm thick polyvinylidene chloride polymer film substrates via a thick spacer, and kept at a constant temperature of 30° C. for 3 hours. After that, while maintaining the temperature at a constant temperature of 30'C, UV rays were irradiated for 3 hours to create a thickness of 1.
00 μl of polymer film was obtained. At that time, the polymer film used as a substrate could be easily removed from the polymer film 9 base.

Next, for comparison, 10% of the liquid crystal solution was mixed uniformly in the same manner.
It was sandwiched between two glass substrates via a 0 μl thick spacer and kept at a constant temperature of 30° C. for 3 hours. Thereafter, while maintaining the temperature at a constant temperature of 30'O, ultraviolet rays were irradiated for 3 hours to obtain a polymer film Bi having a thickness of 100 μm.

It took 6 hours of working time to remove the glass substrate from polymer film B.

The spectrophotometric spectra of these polymer films, B, λmaXIΔλ, Δam and Mu. was measured and the values are shown in Table 1. The results were measured at five points within the 1α angle polymer film. As you can see from this result, compared to polymer film B, the polymer film is more effective. It is an optical filter with uniform optical properties and no scratches on the film surface.

(Hereinafter referred to as Kinshiro) 10,\-/゛11, Example 2 Liquid crystal (-Rt in -4 material and L2 Boryley glutamic acid n-butyl ester in 60) 0, -Oichigo 1'f-f:
Nomer-triethylene glycol dimethacrylate/
-1-%) 60 weight Wf”f) Scale fjt +/, 36~
4o ``C(7) rr('+ e K ('While holding A, both sides were swallowed and thoroughly stirred. +, -r I: tt,: A homogeneous liquid crystal solution was prepared at 200/I. m lwa C hasbe grudge 17 and 2 J?mi 50 /7 Il
l's bolizo "1 pi L/, /'s j'; i1 minute - r7 i #
, 1-board V (A40S L, 26”Cty)-A
If7tiA degree is 3 ++, and g is maintained at 1~. after that,
Subsequently, the film was kept at a constant temperature of 26" (l, 7) and irradiated with ultraviolet light (t) for 3 hours to obtain a polymer film C with a length of 20011 m.
The polymer Noylno. used in the above was easily removed from the polymer Filno.C to yield CI dregs.

Next, for comparison, liquid crystal kt crystals, which were mixed one by one, were sandwiched between two glass substrates via a 20,077 m thick spacer, and heated to a crystallinity of 26"C - constant 7. After that, it was taken over and 26°'(E'>I' 7
! ,,1. 31〕j[il
A polymer film D of 200/Jm was obtained. 1 to take from polymer film D on gasis substrate 4, but 6 tLllllt for J-! ,1
It took a lot of work time.

The spectra and values of these polymer noils AC and D for M and W are all shown in Table 2. The result is 1 ('m square poly-
7 - Measurements were taken at 6 points within the film. C. As can be clearly seen from the results, polymer film C was more sensitive than polymer films J and D. There are no keys on the surface of Kazoro, Te1, Reno, and Illum, and it is a uniform tail filter with -tail filter % ('.1).

(hereinafter referred to as Kinshiro) 1 3 ・-7 1 4 , Effects of the Invention According to the present invention, when manufacturing an optical filter, and using the Kl 1 molecule film part as a translucent x plate, By photopolymerizing, a) a solid polymer film having a coreless liquid crystal structure can be easily removed from the molecular film substrate to form C1- and L.]1.
) By using a molecular film substrate, the working time required to remove the solid polymer film and the transparent substrate can be shortened, and the surface condition of the removed solid polymer film is good. , it is possible to make an optical filter with uniform 4.+I"I'k without affecting the characteristics of the violet filter. 1- It is an effective invention.

[Brief explanation of drawings]

The figure does not show elements for evaluating the optical characteristics of the optical filter manufactured according to the present invention.

Claims (4)

[Claims] (1) A cholesteric liquid crystal made of a mixed solution of a polypeptide compound and a photopolymerizable monomer is sandwiched between two transparent polymer film substrates, planarly oriented, and then photopolymerized to form two polymer films. A method for manufacturing optical filters in which a substrate is removed to obtain a solid polymer film with a cholesteric liquid crystal structure. (2) Claim 1, wherein the polymer film substrate is at least one of polypropylene, polyethylene, polyvinyl chloride, polystyrene, polyvinylidene chloride, polyamide, polycarbonate, and vinyl acetate. A method for manufacturing an optical filter. (3) The method for producing an optical filter according to claim 1, wherein the polypeptide compound is a derivative of a polyacidic amino acid or a polyacidic amino acid ester. (4) At least one type of photopolymerizable monomer (meth)
2. The method for producing an optical filter according to claim 1, wherein the optical filter contains an acrylic ester or a derivative thereof.