JP2005226196A - Composite having light-reflecting function and structure chip having light-reflecting function - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a structure having a light-reflecting function, not only developing vivid color of a structural color itself, but also capable of being formed as a fine fibrous material and used for obtaining fine chip, a composite having light-reflecting function capable of developing a new combined color and texture by using the such fibrous structure having light-reflecting function and further to provide a chip material composed of the fibrous structure having light-reflecting function and various kinds of articles using the chip material composed of the fibrous structure having light-reflecting function. <P>SOLUTION: Various kinds of articles, e.g. woven fabric, knitted fabric and nonwoven fabric are obtained by combining one or more kinds of fibrous structures selected from a group consisting of a first structure having light-reflecting function having light transmissivity and helical cycle structure 1 and inclining a helical axis 2 of the helical cycle structure 1 at a prescribed angle θ to the fiber axis and exhibiting a structural color thereby and a second structure having light-reflecting function, exhibiting a structural color, with the proviso that the structure may include the above structure having the helical cycle structure 1, a third structure having light-reflecting function, exhibiting an article color and a fourth structure having light-reflecting function, exhibiting a light source color, in the fibrous structure having at least either one optical function selected from reflecting properties of infrared light and ultraviolet light. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an optical functional structure that reflects light in a wavelength region of visible light, infrared light, or ultraviolet light by a light reflecting action, and more specifically, without using a pigment or a dye. Color combination (object color, light source color) by the combination of light reflecting functional structures that selectively reflect light of wavelength and exhibit structural color (structural coloring), or such light reflecting functional structures and other coloring principles This relates to a light reflection functional composite comprising a combination with a structure.

Light energy is generally classified into visible light (wavelength 380 nm to 780 nm) that can be recognized by our eyes, ultraviolet light with a shorter wavelength range (wavelength 290 nm to 380 nm), and infrared light with a longer wavelength range than visible light (wavelength 780 nm or more). The Of these, the visible light region is closely related to our visual perception, and senses the color of various objects under this light.
In general, the color of an object is caused by the object absorbing part of the light. Coloring using this principle has been used in the past, and is specifically a method using so-called pigments such as pigments and dyes, and most coloring and coloring around us are based on this method. ing.

  However, coloring by these not only requires various pigments and dyes, but also requires a kneading process and waste liquid treatment, and has been regarded as a problem in terms of process and environment. Also, in terms of quality, problems such as elution on the surface of the object, resulting in a decrease in texture, and failure to maintain the initial vivid color tone due to fading due to ultraviolet rays (UV), impairing design and merchandise. Not a few points have been pointed out.

In order to solve these problems and to develop new color materials, structural color development (color generation based on light interference, diffraction, and scattering) that does not use so-called pigments such as conventional pigments and dyes has recently been developed. In the spotlight.
In short, this basic color development mechanism is based on the interaction of light with a regular fine structure formed on the surface of an object or in its interior, and several techniques are already known.

For example, there has been reported a structure that develops color by forming a structure in which two types of polymer substances having different refractive indexes are alternately laminated with tens of layers (see, for example, Patent Document 1). This principle is that Fresnel reflections that occur at the interfaces of alternating layers with different refractive indexes cause interference, resulting in the wavelength dependence of the reflectivity and the increase or decrease of the reflectivity itself. This is a coloring phenomenon that appears when overlapping with a phase difference. The reflection spectrum peak λ _{1 at} that time is λ ₁ = 2 (n _a d _a + n _b) , where n _a and n _b are the refractive indexes of the two kinds of materials and d _a and d _b are the thicknesses of the two types of substances. given by d _b), when the optical thickness of both materials are equal, _i.e., when _{n a d a = n b d} b, giving the maximum strength.
Further, Patent Document 1 discloses a film-like reflective polymer object in which the refractive indexes of at least the first and second polymer materials are different from each other by at least 0.03 and are laminated with a thickness of about 100 nm. Yes.

  Furthermore, a fibrous coloring structure having an alternately laminated structure composed of two types of polymer substances having different refractive indexes is also disclosed (see Patent Document 2). This colored fiber is a non-dyed colored fiber, and has a characteristic that the color changes depending on the direction of viewing with high-quality shine, and depending on the color of other fibers combined with this fiber, It presents a texture specific to the light interference effect.

On the other hand, as a structure using the diffraction / interference action for the interference action as described above, a structure that develops color by the interaction of light with a structure having a narrow groove of a certain width on the fiber surface has been proposed. (For example, see Patent Document 3). This principle is a system (so-called diffraction grating) in which a large number of grooves of predetermined dimensions (groove depth, groove spacing, etc.) are regularly formed on a flat surface or concave surface, and light is incident at an angle. In this case, a color having a specific wavelength λ is given at a certain diffraction angle. That is, when light enters the groove having a predetermined dimension as described above, an optical path difference ΔL is generated. When the optical path difference is an integral multiple of the wavelength λ, the reflected light is intensified and brightened (optical path difference ΔL = mλ Where m is the diffraction order and m = 0, 1, 2,...
JP-A-4-295804 Japanese Patent No. 3036305 JP-A-8-234007

However, in the reflective polymer object composed of the first and second polymers having different refractive indexes described in the above-mentioned Patent Document 1, vivid colors (high reflectance and sharpness in the reflection spectrum (the peak half-value width is small) In order to obtain ()), it is necessary to combine materials that increase the difference in refractive index between the two polymers and the ratio thereof, or to increase the number of layers. However, in general, it is almost impossible to make a large difference in refractive index or ratio in a combination of moldable polymers (the refractive index n of the polymer is generally in the range of 1.4 to 1.7). Therefore, it is unavoidable to increase the number of layers to ensure reflectivity, which means that the thickness of the reflective polymer object is increased (the fiber thickness is 10 denier or When it is applied to woven fabrics, knitted fabrics, nonwoven fabrics, etc., it becomes rigid and it is difficult to obtain a good texture.
In addition, even when cut into short pieces and used as a chip material for coating, since the thickness becomes large, the normal coating thickness (15 to 20 μm) overlaps each other or is disposed obliquely. As a result, it was difficult to achieve smooth coating using the mass production line (showing the smoothness and glossiness of the coating film).

  Such a problem also applies to the coloring structure described in the above cited document 2.

Furthermore, even in a structure that develops color based on diffraction / interference action as described in Patent Document 3 described above, it is difficult to make a fine fiber of several deniers that can secure a texture and a chip material for fine coating. In addition, there is a problem that the color tone is inferior to the rainbow color like a CD board and is inferior in product quality.
Also, from the viewpoint of the manufacturing process, for example, in the case of a thin film, a special film forming apparatus (such as a roll-to-roll type large vapor deposition apparatus or a plasma polymerization apparatus) is required, and film forming conditions can be optimized. Since post-processing is also required, there is a problem that it is not practical.

  The present invention has been made by paying attention to the above-mentioned problem in a light reflecting functional structure that develops color based on the structure without using a pigment such as a pigment or a dye in the visible light region (structural color development). The light reflection function structure that not only expresses the original vivid color of the structural color but also can be made into a fine fiber and obtain a fine chip material, and such a fiber light reflection function A light-reflective functional composite that exhibits a novel composite color and texture using a structure, a chip material composed of the above-mentioned fibrous light-reflective functional structure, and various articles using the light-reflective functional structure chip material The purpose is to provide.

  As a result of intensive studies to achieve the above object, the present inventors have focused on selective reflection characteristics of a specific wavelength due to a helical periodic structure in, for example, a liquid crystal polymer material, etc. It has been found that the diameter can be further reduced as compared with the laminated structure fiber, and it can be applied to various products by combining with other fibers or by making into microchips, thereby completing the present invention. It was.

  The present invention is based on the above knowledge, and the light reflection functional composite of the present invention is a fibrous structure having an optical function of at least one of the reflection characteristics of visible light, infrared light, and ultraviolet light. A first light-reflecting functional structure that has a light-transmitting helical periodic structure and the helical axis of the helical periodic structure is inclined at a predetermined angle with respect to the fiber axis, and thereby exhibits a structural color; At least one structure selected from the group consisting of a second light reflecting functional structure exhibiting a color, a third light reflecting functional structure exhibiting an object color, and a fourth light reflecting functional structure exhibiting a light source color For example, a thread, a woven fabric, a knitted fabric, or a non-woven fabric.

Further, the light reflecting functional structure chip of the present invention is widely applied as a glittering material to articles such as paints, coating films, painted bodies, film structures, various molded articles such as plastics, and non-woven fabrics. The first light-reflecting functional structure exhibiting a structural color due to the periodic structure is cut into a predetermined length, and the length of the spiral periodic structure in the cross section perpendicular to the fiber axis direction of the chip is determined in the direction of the helical axis. b, and the length in a direction perpendicular to the helical axis a, when the length of the fiber axis direction is L, a / b ratio is 1 to 10 ^second range, and / or L / a ratio of 0.1 characterized by a 10 ^second range, and further, with such reflecting light structure chip, and the light reflection function a structure exhibiting a light reflection function structures and object color exhibit different structural color from that of the chip Among the light reflecting functional structures that exhibit the light source color It is characterized by containing a chip comprising at least one structure barrel.

  Furthermore, the laminated structure of the present invention comprises a layer containing the light reflecting functional structure chip alone on a substrate, or a layer of a light reflecting functional structure that exhibits a light source color, or a light reflecting functional structure that exhibits an object color. And at least one of the layers including the chip of the light reflecting functional structure exhibiting the object color.

  According to the present invention, a first fiber that forms a fiber shape having a light transmission and a helical periodic structure, and exhibits a structural color when the helical axis of the helical periodic structure is inclined at a predetermined angle with respect to the fiber axis. The light reflection functional composite is configured using the light reflection functional structure, and the light reflection functional structure of the light reflection functional composite is an average refractive index of the structure without using a pigment or a dye, The function of selectively reflecting light of a specific wavelength determined by the pitch of the helical periodic structure and the angle of the helical axis from the normal to the fiber axis, and transmitting light of other wavelengths, and only the helical structure of the molecule Because it exhibits such optical functions, it can be processed into fibers with a very small diameter compared to fibers with a narrow groove structure or laminated structure, and it has excellent texture and expresses a new composite color. Do Coalescence can be obtained, for example, yarns or woven, knitted, nonwoven or the like.

  Further, the light reflecting functional structure having an ultrafine diameter as described above can be made into a fine light reflecting functional structure chip by cutting it to a predetermined dimensional ratio. When applied to films, plastics, plastic moldings, and even paper and non-woven fabrics, they may overlap, or may be obliquely oriented to impair the smoothness of the surface and the reflective surface may not be aligned with the incident light side. Therefore, it is possible to secure a high reflectance.

  Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.

First, the first light-reflecting functional structure referred to in the present invention, that is, a structure having a light-transmitting helical periodic structure and the helical axis of the helical periodic structure being inclined at a predetermined angle with respect to the fiber axis. The fibrous light reflecting functional structure exhibiting color will be described in detail.
FIG. 1A is a conceptual diagram showing the form of the light reflection functional structure, and the structure A is assumed when the longitudinal direction of the first light reflection functional structure A having a fibrous shape is the fiber axis direction. Has a light transmitting property and has a helical periodic structure 1, and the helical axis 2 of the helical periodic structure 1 has a basic structure that is inclined at a predetermined angle with respect to the fiber axis.

FIG. 1 (b) is a conceptual diagram of the helical periodic structure 1. The helical periodic structure 1 is shown in FIG. 1 when the helical axis 2 is taken in the z-axis direction. For example, the liquid crystal polymer molecular plane (lamella: specifically referred to as a molecular orientation vector) constituting A is shifted and formed so as to rotate little by little with respect to the z axis. The minimum unit of helical periodicity is 1 pitch.
In FIG. 1B, it is described that four molecular planes (lamellar) are arranged in a ½ pitch for convenience of illustration, but in an actual system, this 1 / It has a lamella consisting of several hundred layers between two pitches. And this helical periodic structure 1 is a structure regularly arranged with respect to the fiber axis.

  Further, as shown in FIG. 2, the light reflection functional structure A may be a structure in which the normal to the fiber axis and the helical axis 2 of the helical periodic structure 1 are arranged at an angle θ. 1 and 2, only one pitch is shown as the helical pitch P for convenience of explanation, but in actuality, it has a structure in which this pitch is repeated as a minimum unit. ing.

Next, in the light reflection functional structure A as shown in FIGS. 1 and 2, the reason why the reflected light is selectively emitted when the light is incident toward the fiber axis will be described.
When the average refractive index of the light reflecting functional structure A is n and the pitch of the helical periodic structure is P, the helical axis of the periodic structure forms an angle with respect to the fiber axis, and the angle from the normal to the fiber axis. Is considered as θ (considered as one Bragg element). Here, when light is incident on this structure, the relationship between the wavelength λ _{M of} light that gives the maximum reflected light intensity and the helical pitch P in the structure is obtained by applying the Bragg reflection concept.
λ _M = nPcos θ (where 0 ° ≦ θ <90 °) (1)
The following relationship is obtained. This relationship is based on the assumption that the helical pitch P of the Bragg element does not basically change. Accordingly, the light incident on the light reflecting functional structure A configured as described above selectively reflects light having a specific wavelength λ _M based on the relationship of the expression (1) due to the order of the helical periodic structure. The light of other wavelengths is transmitted. Therefore, a color function to selectively reflect light of a specific wavelength lambda _M in the visible light range, and can also be expressed a function of reflecting the light of each wavelength in the ultraviolet or infrared region.

For example, FIG. 3 shows a relationship between the formula (1) and poly (γ-benzyl-D-glutamate-) of cholesteric liquid crystal forming polypeptides that are light-transmitting polymer materials (average refractive index n = 1.58). It is a graph based on the constant of (CO-γ-alkyl-D-glutamate). However, as the value of the helical pitch P, a typical value of 0.346 μm is adopted.
As is clear from this figure, the maximum reflection peak wavelength λ _M becomes 0.55 μm as the angle θ between the helical axis 2 of the helical periodic structure 1 and the fiber axis changes from 0 ° to 30 ° and further to 60 °. It can be seen that the color changes from (green) to 0.49 μm (green blue) and further to 0.32 μm (colorless). That is, in the light reflection functional structure A, when the angle θ between the helical axis 2 of the helical periodic structure 1 and the normal to the fiber axis is molecularly oriented with constant order, the structural body A is visible, for example. When visually observed under the light beam region, the peculiarity that the color changes depending on the viewing angle is exhibited.

  Moreover, about the arrangement | positioning state of the helical periodic structure 1 in the 1st light reflection functional structure A, it is comprised so that the helical axis | shaft 2 of the helical periodic structure 1 may incline with a certain angle with respect to the fiber axis. is required.

That is, in the light reflection functional structure A, the arrangement of the helical axis 2 of the helical periodic structure 1 for expressing the optical function is performed at an angle (right angle) with respect to the fiber axis as shown in FIG. There are two possible cases: a case in which the case is arranged with the case shown in FIG. 4 and a case in which the case is parallel to the fiber axis as shown in FIG.
In the case of FIG. 4A, even if the structure A is a so-called fiber form continuously long in the fiber axis direction, it is a fine chip (small piece) or a powder body cut into a predetermined length. However, as long as it is arranged and arranged in a direction in which light is incident so as to face the fiber axis, reflected light having a desired wavelength λ _M can be efficiently obtained based on the equation (1).

  On the other hand, in the case of FIG. 4B, since the spiral axis 2 is arranged parallel to the fiber axis, when light is incident so as to face the fiber axis, reflected light having a desired wavelength is obtained. The reflected light can only be expressed when light enters from the cross-sectional direction. Therefore, the optical function is manifested only when light is incident in the direction of a minute cross section, the optical function (light reflection) efficiency is very poor, and it can be applied to the above-described fibers and glitter materials. Is unsuitable.

In the light reflection functional structure A having such a helical periodic structure, the structure of the light reflecting functional structure A is different from that of the interference-type color former disclosed in Patent Document 1 and Patent Document 2 described above. The merit that the thickness in a body cross section can be made very thin is acquired.
That is, in the conventional interference-type color former, in order to efficiently reflect light of a specific wavelength, it is necessary to laminate at least two types of layers having different refractive indexes, and several tens to hundreds of layers. The thickness (mainly at the fiber cross section) also exceeded 10 μm. On the other hand, in the light reflection functional structure A having a helical periodic structure, since the helical periodic structure of the molecular order itself is responsible for color development, it is not necessary to adopt a laminated structure, and the thickness is naturally reduced to several tens. It can be suppressed to a thickness of nm to several μm.

Therefore, in the light reflection function composite of the present invention using the light reflection function structure A, not only the light reflection function structure A but also the light reflection function structure having such a helical periodic structure. Even in a complex composed of a combination of A and a light reflecting functional structure C that exhibits a structural color by another mechanism, a light reflecting functional structure D that exhibits an object color, a light reflecting functional structure E that exhibits a light source color, etc. It is possible to develop a new composite color that is not found in the prior art.
In addition, these fibrous structures A are cut short to form a chip material (bright material), and this is used as a coating body by forming a coating film, or when forming a plastic film or molded body, Because the thickness is thin, there is no possibility that chip materials (bright material layers) overlap each other and jump out of the surface, or protrude on the surface by oblique orientation and form irregularities, so the sharpness is high, Moreover, it will be possible to provide high-quality products.

  The material system constituting such a light reflecting functional structure A is not particularly limited as long as it has a light transmitting and helical periodic structure, and for example, a known liquid crystal polymer material is applied. be able to. However, a cholesteric liquid crystal polymer material is desirable for the selection of the helical pitch that contributes to the development of the optical function and the fixing of the pitch.

  For example, main chain type polymer liquid crystal forming properties such as acyl derivatives of hydroxyalkyl cellulose, cholesteric liquid crystal forming polypeptides, cholesteric liquid crystal forming aromatic polyesters, polycarbonates, aromatic polyester imides, aromatic polyamides, etc. Examples thereof include compounds, or polymethacrylate-based, polymalonate-based, and polysiloxane-based side chain polymer liquid crystal forming compounds. Examples of the hydroxyalkyl cellulose used for the acyl derivative of hydroxyalkyl cellulose include hydroxypropyl cellulose, acyl derivatives of hydroxybutylated hydroxypropyl cellulose, and the like.

These liquid crystal polymer materials are not limited to the thermosetting type, but may be a type that is cured by ultraviolet rays or electron beams.
Further, in the present invention, the light-transmitting property means that even if it is artificially colored with a pigment such as a pigment or a dye as long as it substantially has light-transmitting property in the wavelength range of visible light, infrared light, and ultraviolet light. Alternatively, it may be colored based on the molecular structure. That is, in this case, in addition to the structural color development based on the helical periodic structure, a synergistic effect (composite effect) with such an artificial coloring (object color) function can give an unprecedented unique color and texture. become able to.

In the first light-reflecting functional structure A in the form of a fiber, for example, a melt spinning apparatus provided with a magnetic field applying means and a forced solidifying means at a position directly below the spinneret is used, and the melt viscosity, the magnitude of the magnetic field, By adjusting the holding time and the like, the orientation of the helical periodic structure of the liquid crystal polymer material can be controlled, and the pitch P of the helical structure in the structure A and the angle θ with the normal of the helical axis 2 can be changed. Can do.
For example, if a thermosetting liquid crystal polymer material is used and the spinneret temperature is constant, that is, the melt viscosity of the liquid crystal polymer is constant, the magnetic field size and the time for holding the magnetic field are changed, and then forced cooling ( Depending on the curing type, the helical periodic structure can be controlled by fixing it by irradiating ultraviolet rays or electron beams.

  As a specific example, poly (γ-benzyl-L-glutamate-CO-γ-alkyl-L-glutamate) of cholesteric liquid crystal-forming polypeptides that are light-transmitting polymer materials (average refractive index n = 1.59) When the spinning temperature is 305 ° C., the winding speed is constant at 50 m / min, and only the magnetic field size B is changed in the range of 0 to 10 kG, the magnetic field B = 0 kG. In this case, the angle θ formed by the normal to the fiber axis and the helical axis 2 of the helical periodic structure is about 90 ° (the helical axis is almost parallel to the fiber axis), and color development cannot be confirmed. On the other hand, as the magnetic field strength B is increased from 2 kG to 3 kG, the angle θ shifts to a lower angle, and when B = 5 kG, approximately θ = 0 °, and vivid green coloring is visually observed. Can be confirmed. When the magnetic field strength B is increased from 5 kG to 7 kG and further 10 kG, the angle θ changes again toward θ = 90 °, and the helical periodic structure shifts to the opposite side of the normal line. Go.

  Thus, by changing the magnetic field magnitude B and the magnetic field holding time, the helical periodic structure in the liquid crystal polymer material can be controlled, and a desired optical reflection function can be obtained.

  The light-reflecting functional complex of the present invention provides the second light that is structurally colored by the same or other mechanism with respect to the first light-reflecting functional structure A that exhibits a structural color based on the helical periodic structure as described above. Any two or more selected from a reflective functional structure, a third light reflective functional structure exhibiting an object color, a fourth light reflective functional structure exhibiting a light source color, or these second to fourth structures The second to fourth light reflecting functional structures will be specifically described below.

First, as the second light reflection functional structure (B), any structure color may be used. For example, a structure that develops a structure color by a helical periodic structure similar to the first light reflection functional structure A may be used. In addition, a laminated structure made of materials having different refractive indexes as described in Patent Documents 1 and 2 (interference action) and a narrow groove structure described in Patent Document 3 (diffraction / Interference action), due to a regular fine structure composed of materials with different refractive indices (diffraction / scattering action), or even a regular fine structure composed of materials with different refractive indices, or gemstones such as diamond (refraction) As can be seen in a high-rate material), it is possible to use a material having a different refractive index depending on the wavelength (dispersion action).
In the present invention, the “structural color” does not have a color per se, but a phenomenon that emits a color by having a fine structure at or below the wavelength of light (for example, http: //mph.phys.sci. osaka-u.ac.jp/ssc.kozoshoku2.html), which means the color of light, but from the viewpoint of hue, brightness, saturation (three attributes of color), and hue change depending on viewing angle It is desirable that the color be developed based on at least one of the interference, diffraction and scattering effects of light.

In addition, as the third light reflection functional structure (C), for example, a conventional general fiber that develops color with a pigment such as a dye or a pigment can be used.
Here, the “object color” is a color that can be reflected by hitting the object once or felt through the light that has passed through the object (see, for example, page 6 of “Nikkan Kogyo Shimbun:“ Interesting Colors ”). Specifically, in addition to the above-mentioned pigments and dyes, the color develops based on the molecular structure itself (in this case, brown), for example, a polyimide fiber having a chromophore bonded to the side chain. Things can be used.

  The fourth light reflection functional structure (D) exhibits a light source color, and the “light source color” referred to here is literally the color of light that exits the light source and directly enters our eyes. (For example, see Nikkan Kogyo Shimbun: page 6 of “Interesting Colors”), specifically, color is generated by the action of at least one of an electric field, a magnetic field, heat, light, and mechanical external force. Things can be used. A specific example is a color television. In this case, it is a kind of light source color using a fluorescent material irradiated with an electron beam (a kind of light) as a light source.

FIG. 5 shows a structure of a fibrous electroluminescent element (electroluminescence element: EL element) as an example of the fourth light reflecting functional structure exhibiting such a light source color. Examples of the light reflecting functional structure D include inorganic EL elements and organic EL elements. First, an example using the former will be described. Constituently, a tin oxide-based or indium oxide-based light-transmitting electrode 6 is coated around a colored body 5 made of a resin colored in an arbitrary color, and a sulfide such as ZnS, for example, is coated on the periphery thereof. In addition, the light-emitting layer 7 doped with Mn ²⁺ or rare earth ions, and the light-transmitting electrode 8 are concentrically coated, and the color of the colored body 5 is observed before voltage application, When a voltage is applied to both electrodes 6 and 8 to apply an electric field to the light emitting layer 7, the light emitting layer 7 self-emits light with a high brightness and a very clear color according to its components.

  In addition, in the organic EL, a tin oxide-based or indium oxide-based transparent electrode 6 is coated around the colored body 5 made of a resin colored in an arbitrary color as described above, and further, for example, polyphenylene vinylene is formed around the periphery. A light emitting layer 7 made of (PPV) derivative, polyfluorene (PF) derivative, or the like, and a light transmissive electrode 8 are concentrically covered. In such a configuration, the color of the colored body 5 is observed before voltage application, whereas a voltage is applied to both electrodes 6 and 8 to apply an electric field to the light emitting layer 7, thereby increasing the color from the light emitting layer 7. It is self-luminous in brightness and very clear color. In addition, the colored body 5 does not necessarily need to be arranged.

In addition to this, a material that emits light by heat, light, or mechanical strain (external force) can also be used.
For example, organic anthracene and polyvinylcarbazole thin films emit light (Thermo Luminescence, Photo Luminescence), and polyvinylidene fluoride (PVDF) emits light (Piezo Luminescence) when pressure is applied.

  Below, the specific form of the light reflection function composite of this invention is demonstrated.

FIG. 6 shows, as a warp, a yarn Sa obtained by bundling or twisting single fibers composed of the first light-reflecting functional structure A exhibiting a structural color by having a helical periodic structure as described above, The second light-reflecting functional structure B exhibiting a structural color indicates a woven fabric obtained by plain weaving as a weft yarn Sb composed of a single fiber that is structurally colored by a similar helical periodic structure. Both warp yarn Sa and weft yarn Sb are helical. Because it is a structural chromophore with a periodic structure, it is possible to make single fibers extremely thin and flexible, and at the intersection of both threads, light other than reflected light is transmitted to the side opposite to the incident light side. However, it produces a clear color with a very transparent feeling. In addition, there is an advantage that color development can be maintained even if both yarns are twisted.
At this time, the reflection characteristics (peak wavelength: λ _M ) of the single fibers constituting the warp Sa and the weft Sb, that is, the color tone of the structural color can all be the same, while the structural coloration of the warp Sa and the weft Sb It is also possible to change the characteristics or use yarns made of single fibers having different coloring characteristics as the warp yarn Sa or the weft yarn Sb, thereby making the fabric more complex in appearance.

Further, FIG. 7 shows that the yarn Sa composed of the first light reflection functional structure A having the helical periodic structure as described above is the warp, while the second light reflection functional structure B exhibiting the structural color is the warp Sa. Shows a woven fabric obtained by plain weaving with a weft Sb ′ composed of single fibers that are structurally colored by a different color development mechanism, for example, a laminated structure of materials having different refractive indexes. In this case, since the floating state changes alternately at the intersection of the warp yarn Sa and the weft yarn Sb ′, for example, by using a light and dark color tone for both yarns, a delicate contrast and gloss with transparency are obtained. A fabric with a feeling can be obtained.
In this case as well, it is possible to change the structural color development characteristics of the warp yarn Sa and the weft yarn Sb ', or to use yarns composed of single fibers having different color development properties as the warp yarn Sa or the weft yarn Sb'. The single fiber composed of the first light reflecting functional structure A that is structurally colored by the above and the single fiber composed of the second light reflecting functional structure B that is structurally colored by the other coloring mechanism are bundled or twisted together. It is also possible to use yarn.

Further, in FIG. 8, similarly to the above, the yarn Sa made of the first light reflecting functional structure A is a warp, and the yarn Sc made of a single fiber of the third light reflecting functional structure C exhibiting an object color is a weft. 8 (a) shows a plain weave, and FIG. 8 (b) shows a satin weave.
Regarding the appearance, in the former (plain weave), the floating state of the intersection of the warp yarn Sa and the weft yarn Sc changes alternately, so that the color tone and glossiness due to the difference in the coloring mechanisms of both are emphasized. In the latter (red satin weave), since the degree of ups and downs at the intersection is large, the color tone and the glossiness are felt more strongly than the plain weave.

Further, FIG. 9 shows a fourth light reflection functional structure D having a light source color while the yarn Sa made of the first light reflection functional structure A having a helical periodic structure as described above is used as the warp. The example of the textile fabric which carried out plain weaving as the weft Sd which consists of fibrous EL elements as shown in FIG.
Therefore, at the intersection with the warp yarn Sa, in particular at the portion where the weft yarn Sd is floating on the upper surface, a new high-saturation and high-brightness composite color with a new light source color becomes dominant. Further, since the weft Sd made of the fourth light reflecting functional structure D is a self-luminous body, there is a merit that the color can be developed even at night and an excellent function can be exhibited in terms of safety by ensuring visibility. As the fourth light reflecting functional structure D that emits a light source color by such an external force, a material that emits light by heat, light, mechanical strain, or the like is used in addition to the above-described electroluminescent element. can do.

The fibrous first light reflection functional structure A constituting the warp yarn Sa has a repeating structure of a plurality of blocks that emit light of different wavelengths in the fiber axis direction of the structure. The pitch P of the helical periodic structure in each block may be different from each other.
For example, it has a repeating structure of block X / block Y / block X /... In the fiber axis direction, and the angle θ formed by the helical axis of the helical periodic structure in each block and the normal to the fiber axis is constant (for example, θ = 0 °), and the pitches P of the helical periodic structures in the block X and the block Y can be different from each other. For example, blue color can be generated from the block X and green color can be generated from the block Y. .

  In addition, the pitch P of the helical periodic structure in each block can be made constant, and the angle θ formed by the helical axis and the normal line of the helical periodic structure in the block X and the block Y can be made different from each other (of course, The pitch P and the angle θ may be different from each other). In this way, the color developing structure is configured to emit light of different wavelengths in the fiber axis direction, and the color changes slightly in the visible light region. By using the body, it is possible to obtain a reflective function complex that expresses a more complicated color change.

  The first light-reflecting functional structure A exhibiting a structural color based on the helical periodic structure is formed into a chip material by cutting into a predetermined size, alone or other second to fourth light-reflecting functional structures. When mixed with one or more types of chips of bodies B, C, D as a coloring material or a bright material, it is dispersed in a light-transmitting paint base material, so that automobiles, home appliances, building materials, toys, sports equipment It can be applied to various interior and exterior surfaces such as luxury cosmetics and decorative signs. Moreover, by dispersing in resin, it can be applied to resin panels, films and plastic molded products, or can be wound into nonwoven fabrics and paper.

  At the time of chip formation, the structural bodies A, B, C, and D that form a fiber are bundled in an order of, for example, several hundred to several hundred thousand, and this is mechanically cut with a cutter or the like, A minute chip material (small piece) can be used. For example, several hundreds of thousands of these structures are assembled with an appropriate impregnating solution (water, glue, paraffin, etc.) or a polymer resin string to form an assembly, and then the assembly bundle has a constant speed. Using an automatic cutter (for example, shearing) equipped with a feeding mechanism, the sheet is continuously cut to a length of about several mm to several tens of μm. And a classification (sieving) process is given and the chip | tip material of a desired dimension can be obtained. Regarding the chipping methodologies, for example, the 116th page of “Textile Engineering (II) Fiber Structure, Structure and Physical Properties” edited by the Japan Textile Machinery Society and the “Fiber Engineering (III) Fiber Manufacturing and Structure” edited by the same society. Pp. 223-225 of “Body and physical properties”.

  Alternatively, after the fibrous structures A, B, C, D are bundled as described above, they are subjected to a freezing treatment and subjected to pulverization and classification (sieving) by various methods to obtain a powder body having a predetermined size. Is also possible. All of these can be widely applied to various fields as an excellent coloring material and glittering material that have never existed before.

In the light reflecting functional structure chip of the present invention obtained by cutting the fibrous first light reflecting functional structure A exhibiting a structural color based on the helical periodic structure into a predetermined size, as shown in FIG. Further, when the length in the spiral axis direction in the cross section perpendicular to the fiber axis direction of the structure chip Ta is b, the length in the direction perpendicular to the spiral axis is a, and the length in the fiber axis direction is L, at least It is necessary to have a dimensional ratio such that 1 ≦ a / b ≦ 10 ² , or 0.1 ≦ L / a ≦ 10 ² , thereby forming a coating film containing the chip Ta. As shown in FIG. 10 (b), the probability that the reflecting surface of each chip material Ta (the surface intersecting the extension line of the helical axis) faces the incident direction of light is improved, and the reflectance of the coating film is greatly improved. be able to.

That is, in FIG. 11 (a), as shown in FIG. 11 (b), the length dimension ratio (L / a) is kept constant at 2, while the sectional dimension ratio (a / b) is changed. It shows the light reflectance of the coating film when the functional structure chip Ta is dispersed in the transparent coating film, and as is clear from the figure, the larger the value of the (a / b) ratio, Since the shape of the structure chip Ta becomes flat in the direction of the reflecting surface, the structure chip Ta is easily oriented flat in the coating film, and the reflecting surface for incident light can be secured to the maximum. Incidentally, when the value (a / b) ratio exceeds 10 ^2, since the chip Ta consists predominantly liquid crystal polymer materials, inferior in rigidity as compared with conventional inorganic pigments and bright materials, in the coating film It is considered that the reflectance is lowered by being oriented obliquely or arranged in a distorted state.

  On the other hand, when the value of the (a / b) ratio is smaller than 1, the probability that the reflecting surface of the chip material Ta is aligned toward the incident light side in the coating film is greatly reduced, and the light reflectance is also reduced. Thus, it cannot be used practically. In addition, the range of the more preferable (a / b) ratio from a practical viewpoint is the range of 3-10.

12 (a), as shown in FIG. 12 (b), the dimension b in the direction of the helical axis in the cross section of the light reflecting functional structure chip Ta is kept constant at 5 μm, and the length dimension ratio (L / a) Shows the change in the light reflectance of the coating film when the cross-sectional dimension ratio (a / b) is changed. As is clear from the figure, the larger the (L / a) ratio, of the light reflection factor increases, this ratio is more than 10 ^2, because the or oriented chip material with each other and cross in the coating film, the probability that irregularities projecting from the coating film or to generate increases, The coating film smoothness is inferior, and the light reflectance of the coating film is also lowered, making it impossible to put to practical use.

  On the other hand, if the (L / a) ratio is less than 0.1, the probability that the cut surface faces the incident light side increases, and therefore the amount of reflected light with respect to the incident light by the chip material Ta becomes extremely small. . In addition, it can be said that the range of the more preferable (L / a) ratio from a practical viewpoint is the range of 1-10.

In the light reflecting functional structure chip of the present invention, as described above, the light reflecting functional structure chip Ta obtained by cutting the first light reflecting functional structure A exhibiting the structural color based on the helical periodic structure into a predetermined dimension. Furthermore, the chip Tb composed of the second light reflecting functional structure B exhibiting the structural color, the chip Tc composed of the third light reflecting functional structure C exhibiting the object color, and the fourth light reflecting functional structure exhibiting the light source color. A chip material in which at least one chip selected from the chips Td made of D is mixed may be used.
At this time, the coloring mechanism of the chip Tb made of the second light reflecting functional structure B is not particularly limited, and may be based on a helical periodic structure, but from the first light reflecting functional structure A. It is desirable that the chip Ta has a different structural color.

FIG. 13 is a schematic view showing an example of such a mixed-type light reflection functional structure chip, which is a light reflection functional structure chip Ta that exhibits a structural color based on a helical periodic structure, and a chip Tc that exhibits an object color. The example which mixed these is shown. As a result, it becomes an excellent composite glittering material that exhibits the advantages of both chips having different coloring mechanisms.
At this time, as a matter of course, instead of the structure chip Tc or in addition to the structure chip Tc, the chip Tb made of the second light reflecting functional structure B exhibiting the structural color and the first light source color. It is also possible to mix the chips Td made of the four light reflecting functional structures D.

  A composite glitter material composed of such various light reflecting functional structure chips is a coating material that develops a novel design by being dispersed in a paint, dispersed in a resin material, or mixed in a fiber material. A coated body provided with a film, a plastic film or molded body, a nonwoven fabric, paper, or the like can be provided.

FIG. 14 is a schematic diagram showing, for example, a laminated structure represented by a coating film as a specific example. As shown in FIG. A layer 11 including a composite chip (see FIG. 13) composed of a functional structure chip Ta and a chip Tc exhibiting an object color can be formed.
Moreover, as shown in FIG.14 (b), the clear layer 12 can also be further provided on this composite chip | tip material layer 11, and it can apply to various articles | goods.

Further, by combining various chip materials having different coloring mechanisms as described above together with various layers, an original composite color can be developed.
For example, FIG. 15A shows a layer 11 containing the chip Ta of the first light reflection functional structure A that exhibits a structural color based on a helical periodic structure on the substrate 10, and a layer 13 that exhibits an object color. Are laminated. With such a combination, various kinds of articles in which the main color development is an object color, and the hue and content of the chip Ta made of the light reflecting functional structure A can enjoy the change in hue depending on the brightness and viewing angle, A painted body can be provided. In addition, since the thickness of the light reflecting functional structure chip Ta is thin, the probability that the reflecting surface of the chip Ta is oriented in the coating film so as to have maximum reflection with respect to incident light is increased. An excellent coating film can be obtained. In particular, as shown in FIG. 15B, a layer 13 exhibiting an object color is formed on the surface of the base material 10, and a layer 11 containing the chip Ta of the light reflecting functional structure A is provided thereon, and further By providing the clear layer 12 thereon, a more vivid and glossy coating film can be provided.

Further, as shown in FIGS. 16 (a) and 16 (b), combining with a layer exhibiting a light source color, that is, a layer 14 exhibiting a light source color by, for example, an EL element on the substrate 10, and a light reflecting function The layer 11 containing the structure chip Ta is laminated, and the clear layer 12 is further provided on the layer 11 as necessary, whereby the light reflection of the bright and bright color of the light source color and the structural color due to the helical periodic structure Due to the synergistic effect with the glittering feeling of the functional structure chip Ta, it is possible to express unprecedented color and texture.
Such a laminated structure emits light and develops color even in the dark or at night due to its unique self-luminous function, so it has excellent visibility and is extremely useful in terms of safety.

  At this time, the stacking order of the layer 11 containing the light reflecting functional structure chip Ta and the layer 14 exhibiting the light source color is not particularly limited, but the color change depending on the glitter feeling and the viewing angle of the chip containing layer 11. From the viewpoint of enjoying the above, it is desirable to provide the layer 14 exhibiting the light source color on the substrate 10 side.

The basic structure of the EL element as the layer 14 exhibiting the light source color has a structure in which the light emitting layer 7 is sandwiched between the light transmissive electrodes 6 and 8 as shown in FIG.
Moreover, as an EL element, an organic EL type is particularly preferable from the viewpoint of high luminance and ease of processing.

Next, a basic light path in the laminated structure as described above will be described using the laminated structure shown in FIG.
That is, FIG. 17 schematically shows three basic paths of light existing in the above laminated structure (for example, a coating film).

In the first light path P1, incident light hits the chip Ta made of the light reflecting functional structure A, and the reflected light is emitted, and exhibits a structural color (interference color). In the second light path P2, light other than the wavelength emitted as reflected light in the first path P1 is irradiated to the layer 13 exhibiting the object color as transmitted light, and the wavelength other than the light absorbed there. Light is emitted and exhibits the first object color. The third light path P3 is such that light incident on the laminated structure is directly irradiated onto the layer 13 exhibiting the object color, and light other than the absorbed wavelength is emitted therefrom. The object color is exhibited.
In the laminated structure, there are at least three light paths in this way (in addition, after the reflected light from the layer 13 exhibiting the object color is transmitted through the chip Ta or reflected by the chip Ta, There may be a more complicated path such as being reflected again by the layer 13), the combination of these hues, the content of the light reflecting functional structure chip Ta, the interrelation between the thicknesses of both layers, etc. Presents original color and texture.

Thus, the light reflective functional composite of the present invention is applied to various apparel clothing, furniture, toys, building materials, etc. as yarns, woven or knitted fabrics or knitted fabrics, or non-woven fabrics, for example. Can do.
In addition, the light reflecting function composite chip of the present invention including such a light reflecting function composite is also mixed and dispersed as a glittering material in paints, films, plastic moldings, nonwoven fabrics, papers, etc. It can be applied to exterior panels and interiors, exterior walls of buildings, exteriors such as furniture, household appliances, and toys, as well as lighting bodies and electrical decorations.

  EXAMPLES Hereinafter, although this invention is demonstrated concretely based on an Example, this invention is not limited by these Examples.

(1) Manufacture of the first light reflection functional structure A I
As a liquid crystalline polymer material having optical transparency, a polypeptide having an average refractive index n = 1.59 (γ-benzyl-L-glutamate-CO-γ-alkyl-L-glutamate) is selected, and a fiber having a rectangular cross section In order to obtain the first light-reflecting functional structure A exhibiting a structural color due to the helical periodic structure, melt spinning was performed.

That is, a spinneret having a final discharge hole of a 0.1 mm × 0.8 mm rectangular shape is attached to a normal melt spinning apparatus, and a magnetic field application device (magnetic field application device) capable of varying the magnetic field strength at a position immediately below the spinneret. And a forced cooling device for blowing cooling air to the lower position of the portion, and a filament made of the liquid crystalline polymer material was manufactured.
The production conditions were as follows: spinning temperature of 305 ° C., magnetic field strengths of 4.0 and 6.0 kG, and forced cooling air of 1 Nm ³ / min. The winding speed is 50 m / min. It was.

The obtained filament was measured with a microspectrophotometer (U-6500, manufactured by Hitachi, Ltd.), the reflection spectrum of the structure was measured, the reflection peak wavelength λ _M was obtained, and a crossed Nicol was attached to a polarizing microscope. Observe the retardation line from the body, calculate the pitch P of the helical periodic structure based on the result, and further determine the inclination of the helical axis (angle θ with the normal to the fiber axis) from the above data using a computer Calculated.
As a result, when the magnetic field strength is 4.0 kG, λ _M = 380 nm (light purple), and when P = 298 nm, θ = 30 °, 6.0 kG, λ _M = 470 nm (blue). Thus, it was confirmed that P = 298 nm and θ = 0 °. The filaments had a cross-sectional dimension of about 30 μm × 6 μm.

(2) Production of first light reflecting functional structure A II
A cholesteric liquid crystal-forming polyester having an average refractive index n = 1.58 is selected as a light-transmitting liquid crystalline polymer material, and the same melt spinning apparatus as described above is used. Spinning temperature: 292 ° C., magnetic field strength : 2.0 kG, forced cooling air: 1 Nm ³ / min. Winding speed: 50 m / min. A filament made of the above liquid crystalline polymer material was produced under the conditions described above.
As a result, a structural color having a reflection peak wavelength λ _M = 650 nm (red orange), a filament having P = 698 nm and θ = 61 ° was obtained. The cross-sectional dimension of the obtained filament was about 35 μm × 5 μm.

(3) Production of second light-reflecting functional structure B By composite melt spinning and subsequent thermal stretching treatment, it is composed of polyamide having a refractive index of 1.53 and polyethylene naphthalate having a refractive index of 1.63, and the laminated cross-sectional dimension is A filament having an alternately laminated structure (number of laminated layers: 60) of 4.5 × 4.5 μm, the periphery of which was coated with polyethylene naphthalate, and a blue colored structure by the laminated structure was obtained.

[Example 1]
The yarn produced by the above (1) and based on the filaments (short fibers) that are structurally colored in light purple by the helical periodic structure and the filaments that develop blue color are plain-woven as warp yarn Sa and weft yarn Sb, as shown in FIG. A woven fabric was obtained.
In the woven fabric obtained in this way, it looks blue as a whole, and in the overlapping part of the yarns, due to the combination effect of both, there is no blind spot even if the viewing angle is changed greatly (not gray, (Purple blue) was confirmed.

[Example 2]
The yarn produced by the above (1) and based on the light-reflecting functional structure filament that develops a light purple color due to the helical periodic structure is used as the warp yarn Sa, while it is produced by the above (3) and turns blue by the alternately laminated structure. A yarn composed of filaments for structural color development was plain woven as a weft Sb 'to obtain a woven fabric as shown in FIG.
In the woven fabric, it looks purple-blue as a whole, and in the overlapping part of the yarns, the radiant feeling peculiar to the weft Sb 'made of structurally colored filaments is superimposed, and it also exhibits an unprecedented mysterious texture. Was observed.

Example 3
The yarn produced by the above (2) and based on the filaments colored in reddish orange by the helical periodic structure is used as the warp yarn Sa, while the silk yarn dyed with a normal dye and exhibiting a yellow object color is weaved as weft yarn Sc. A woven fabric as shown in FIG. 8B was obtained.
It was confirmed that the woven fabric was excellent in gloss overall and looked orange with high lightness, and even when the viewing angle was changed greatly, there was no blind spot (not gray, yellow orange).

Example 4
The light-reflecting functional structure filament produced by (1) above and colored in a light purple color by the helical periodic structure is cut to a length of about 40 μm, and the (a / b) ratio is about 8 and the (L / a) ratio is About 1.5 light reflecting functional structure chip Ta was obtained.
Then, the light reflecting functional structure chip Ta, together with the chip Tc made of a resin material exhibiting an object color by containing a dark blue pigment, is a two-part acrylic urethane so that the total amount becomes 10% by weight with respect to the entire coating film. Light-reflective functional structure chip by blending with base paint, diluting to viscosity suitable for painting with acrylurethane thinner, painting on surface of black base material 10 washed with alcohol and baking at 80 ° C. for 20 minutes A coating layer 11 containing Ta and Tc is formed to a thickness of about 20 μm, and further a clear layer 12 is formed thereon to a thickness of about 35 μm by an acrylic urethane clear paint, as shown in FIG. A good coating structure was obtained.

  When a painted body with such a coating film is observed under sunlight, it looks mainly purple-blue (when viewed from the normal direction with respect to the coating film structure) and when the viewing angle is changed. It was confirmed that the color changed from bright purple to blue-green.

Example 5
The light reflecting functional structure chip Ta was obtained by cutting the light reflecting functional structure filament produced in the above (1) and blue-colored by the helical periodic structure in the same manner as described above.

Then, an acrylic urethane-based black paint exhibiting an object color was applied on the base material 10 washed with alcohol to form a layer 13 exhibiting the object color to a thickness of about 30 μm.
Next, after blending the light reflection functional structure chip Ta in a two-component acrylic urethane base paint so as to be 10% by weight with respect to the entire coating film, using a paint appropriately diluted with acrylic urethane thinner, The surface of the object color layer 13 is painted and baked at 80 ° C. for 20 minutes to form the coating layer 11 containing the light reflecting functional structure chip Ta to a thickness of about 25 μm. A coating film structure as shown in 15 (a) was obtained.

FIG. 18 shows an example in which the above-mentioned coating film structure is applied to an automobile exterior, and when such a coating film is formed, the incident light (sunlight) of the vehicle body is irradiated. The color changes slightly depending on the angle. At point A, a reflection peak value of λ _M = 520 nm is obtained and looks blue-green, whereas at point B, the reflection peak value of λ _M = 470 nm turns blue. You will see. Furthermore, since the combination with the object color (black) is adopted, it is possible to obtain a high-grade paint color with few blind spots.
In general, when the object color that is the color base is a dark color system (because it can absorb extra stray light) and combined with the structural color emitted from the structural color chip material of wavelength λ, the hue changes depending on the viewing angle. It becomes possible to emphasize more.

Example 6
The light reflecting functional structure filament Ta having a length of about 30 μm was obtained by cutting the light reflecting functional structure filament produced in the above (1) and blue-colored by the helical periodic structure in the same manner as described above.

  Then, as the anode electrode, a polyethylene terephthalate (PET) film coated with indium tin oxide (ITO) is used as the substrate 10, and the ITO surface is washed with alcohol, and then the organic EL layer 100 nm as the layer 14 exhibiting the light source color (green). Thickness (polymer EL layer: formed by spin-coating polyphenylene vinylene (PPV) solution) was provided. Further thereon, a Mg—Ag alloy was formed by vacuum deposition to provide a cathode electrode.

  Further, on the organic EL layer, the light reflecting functional structure chip Ta is contained as a coating composition similar to that described in Example 4, and this is coated to form a thickness of about 15 μm. A clear layer 12 having a thickness of about 30 μm was formed by an acrylic urethane clear paint to obtain a structure as shown in FIG.

  When a DC voltage V = 12 V is applied between the positive and negative electrodes of the structure provided with the coating film thus obtained, a very bright light source color (green) from the organic EL behind becomes a kind of light source. Combined with the structural color (blue) from the light-reflective functional structure having a helical periodic structure, it has an unprecedented mysterious hue (feeling that light blue is scattered in green light) It was confirmed to be present. In addition, it is possible to provide a hue control type structure in which the feeling of the hue slightly changes when the applied voltage is raised or lowered. Moreover, since this structure exhibits a vivid and mysterious hue and texture even at night, it is useful as an advertising body having both visual safety and design.

(A) It is a conceptual diagram which shows the basic structure of the light reflection functional structure which exhibits structural color by a helical periodic structure. (B) It is a figure explaining the helical periodic structure shown to Fig.1 (a). It is a conceptual diagram which shows the other form of the said light reflection functional structure. It is a graph which shows the relationship between the angle which the normal line with respect to the reflection peak wavelength in the said light reflection functional structure, a fiber axis | shaft, and a helical axis | shaft makes. (A) It is explanatory drawing in case the helical axis in the said light reflection function structure has comprised the predetermined angle with respect to the normal with respect to a fiber axis. (B) It is explanatory drawing in case the helical axis in the said light reflection function structure is arrange | positioned in parallel with a fiber axis. It is a perspective view which shows the structure of EL element as an example of the light reflection functional structure which exhibits a light source color. It is a top view which shows the textile fabric which carried out plain weaving of the fibrous light-reflection functional structures which exhibit a structural color with a helical periodic structure as one Embodiment of the light-reflection function composite of this invention. It is a top view which shows the textile fabric which plain-woven the fibrous light reflection functional structure which exhibits structural color with a helical periodic structure, and the fibrous light reflection functional structure which exhibits structural color with another mechanism as embodiment. FIG. 6 is a plan view showing a woven fabric obtained by plain weaving (a) and satin weaving (b) of a fibrous light reflecting functional structure exhibiting a structural color by a helical periodic structure and a fibrous light reflecting functional structure exhibiting an object color as an embodiment. is there. It is a top view which shows the textile fabric which weaved the fibrous light reflective functional structure which exhibits structural color with a helical periodic structure, and the fibrous light reflective functional structure which exhibits light source color as embodiment similarly. (A) It is a perspective view which shows the shape of the light reflection functional structure chip | tip which exhibits a structural color by a helical periodic structure. (B) It is a schematic diagram which shows the structure of the coating film containing the said light reflection function structure body chip | tip. (A) It is a graph which shows the influence of the cross-sectional dimension ratio (a / b) of the chip | tip which acts on the reflectance of the coating film containing the said light reflection functional structure chip | tip. (B) It is a perspective view which shows the change of the cross-sectional dimension ratio (a / b) of the said light reflection functional structure chip | tip. (A) It is a graph which shows the influence of the length dimension ratio (L / a) of the chip | tip which acts on the reflectance of the coating film containing the said light reflection functional structure chip | tip. (B) It is a perspective view which shows the change of the length dimension ratio (L / a) of the said light reflection functional structure chip | tip. It is a conceptual diagram which shows the composite chip | tip state formed by mixing the light-reflective functional structure chip | tip which exhibits structural color by a helical periodic structure, and the light-reflective functional structure chip | tip which exhibits object color. It is sectional drawing which shows the laminated structure (a) which formed the layer containing the said composite chip on the base material, and the laminated structure (b) which further formed the clear layer on it. A layered structure (a) in which a layer including a light reflecting functional structure chip that exhibits a structural color by a helical periodic structure is formed on a base material and a layered structure in which a clear layer is further formed thereon (a) It is sectional drawing which shows b). A laminated structure (a) in which a layer including a light-reflecting functional structure chip that exhibits a structural color by a helical periodic structure is formed on a base material, and a laminated structure in which a clear layer is further formed ( It is sectional drawing of the layer which exhibits a light source color by b) and an EL element. FIG. 16 is a cross-sectional view illustrating a basic path of light in the stacked structure illustrated in FIG. It is a perspective view which shows the state which applied the laminated structure shown to Fig.15 (a) to the vehicle body coating of a motor vehicle.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Helical periodic structure 2 Helical axis A 1st light reflection functional structure B 2nd light reflection functional structure C 3rd light reflection functional structure D 4th light reflection functional structure Sa Yarn (warp)
Sb, Sb ', Sc, Sd Yarn (weft)
Ta, Tc light reflection functional structure chip
DESCRIPTION OF SYMBOLS 10 Base material 11 Layer containing light reflection function structure chip | tip 12 Clear layer 13 Layer which exhibits object color 14 Layer which exhibits light source color

Claims (18)

A fibrous structure having an optical function of at least one of the reflection characteristics of visible light, infrared light, and ultraviolet light, and having optical transparency and a helical periodic structure, and the helical axis of the helical periodic structure is A first light reflection functional structure that exhibits a structural color by being inclined at a predetermined angle with respect to the fiber axis;
At least one fiber selected from the group consisting of a second light reflecting functional structure exhibiting a structural color, a third light reflecting functional structure exhibiting an object color, and a fourth light reflecting functional structure exhibiting a light source color A light-reflecting functional composite comprising a combination with a structure.   The light-reflecting functional composite according to claim 1, which is a yarn, a woven fabric, a knitted fabric, or a non-woven fabric. When the average refractive index of the first light reflecting functional structure is n, the pitch of the helical periodic structure is P, and the angle of the helical axis from the normal to the fiber axis is θ, the wavelength λ _M that gives the maximum reflected light intensity is λ _M = nP cos θ (where 0 ° ≦ θ <90 °)
The light reflecting functional composite according to claim 1, wherein the light reflecting functional composite has a structure satisfying the following relationship.   The first light reflecting functional structure has a repeating structure of a plurality of blocks that emit light of different wavelengths in the fiber axis direction, and the pitch P of the helical periodic structure in each block is different from each other. The light reflection function composite according to any one of claims 1 to 3.   The first light reflecting functional structure has a repeating structure of a plurality of blocks that emit light of different wavelengths in the fiber axis direction, and the angle θ from the normal to the helical axis in the helical periodic structure of each block is different from each other. The light reflecting function composite according to any one of claims 1 to 4, wherein   The light reflecting functional composite according to any one of claims 1 to 5, wherein a main constituent material of the first light reflecting functional structure is a liquid crystal polymer material.   The light reflective functional composite according to claim 6, wherein the liquid crystal polymer material is a cholesteric liquid crystal polymer.   The second light-reflecting functional structure is colored based on at least one of light interference, diffraction, and scattering action, according to any one of claims 1 to 7. Light reflection function complex.   The light reflection function according to any one of claims 1 to 8, wherein the third light reflection functional structure develops a color based on an action of at least one of a pigment, a dye, and a molecular structure. Functional complex.   The fourth light reflecting functional structure is colored based on an action of at least one of an electric field, heat, light, and mechanical external force, according to any one of claims 1 to 9. Light reflective functional complex. A fibrous structure having an optical function of at least one of the reflection characteristics of visible light, infrared light, and ultraviolet light, and having optical transparency and a helical periodic structure, and the helical axis of the helical periodic structure is A light reflecting functional structure chip formed by cutting a light reflecting functional structure that exhibits a structural color by being inclined at a predetermined angle with respect to a fiber axis into a predetermined length;
When the length in the spiral axis direction of the spiral periodic structure in the cross section perpendicular to the fiber axis direction of the chip is b, and the length in the direction perpendicular to the spiral axis is a,
1 ≦ a / b ≦ 10 ²
A light reflecting functional structure chip characterized by the above. A fibrous structure having an optical function of at least one of the reflection characteristics of visible light, infrared light, and ultraviolet light, and having optical transparency and a helical periodic structure, and the helical axis of the helical periodic structure is A light reflecting functional structure chip formed by cutting a light reflecting functional structure that exhibits a structural color by being inclined at a predetermined angle with respect to a fiber axis into a predetermined length;
When the length in the direction perpendicular to the helical axis of the helical periodic structure in the cross section perpendicular to the fiber axis direction of the chip is a and the length in the fiber axis direction is L,
0.1 ≦ L / a ≦ 10 ²
A light reflecting functional structure chip characterized by the above. A fibrous structure having an optical function of at least one of the reflection characteristics of visible light, infrared light, and ultraviolet light, and having optical transparency and a helical periodic structure, and the helical axis of the helical periodic structure is A light reflecting functional structure chip formed by cutting a light reflecting functional structure that exhibits a structural color by being inclined at a predetermined angle with respect to a fiber axis into a predetermined length;
When the length in the spiral axis direction of the helical periodic structure in the cross section perpendicular to the fiber axis direction of the chip is b, the length perpendicular to the spiral axis is a, and the length in the fiber axis direction is L,
1 ≦ a / b ≦ 10 ² and 0.1 ≦ L / a ≦ 10 ²
A light reflecting functional structure chip characterized by the above.   The light reflecting functional structure chip according to any one of claims 11 to 13, a light reflecting functional structure that exhibits a structural color different from the structural chip, a light reflecting functional structure that exhibits an object color, and a light source A light reflecting functional structure chip comprising: a chip made of at least one structure selected from the group consisting of light reflecting functional structures exhibiting colors.   A paint, a coating film or a coated body comprising the light reflecting functional structure chip according to any one of claims 11 to 14.   A film, a plastic molded body, or a nonwoven fabric comprising the light reflecting functional structure chip according to any one of claims 11 to 14.   The layer containing the light reflecting functional structure chip according to any one of claims 11 to 14 is a layer of a light reflecting functional structure that exhibits a light source color alone or a light reflecting function that exhibits an object color. A laminated structure formed with at least one of a layer of a structure and a layer including a chip of a light reflecting functional structure exhibiting an object color.   The laminated structure according to claim 17, further comprising a clear layer.

Images