JPS60954A - Iris color retroreflection filmy article and slit thread thereof - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an iris-colored retroreflective film and its slit thread.

It has been known for some time that retroreflective threads are woven into stage costumes to give them reflectivity (Jikko Sho 39-27).
(See Publication No. 759). This retroreflective thread is made by winding a tape-like material with a reflective film on one side of a transparent synthetic resin film containing glass microspheres. However, the reflective film in this retroreflective thread is a metal film or the like, and there is a drawback that the retroreflected light is monotonous.

SUMMARY OF THE INVENTION In view of the above-mentioned points, the present invention provides a retroreflective thread that emits a richly colored retroreflected light and has an even better decorative effect.

That is, the present invention relates to an iris-colored retroreflective film formed by forming an iris layer on one side of a transparent synthetic resin film containing glass microspheres, a two-ply drawing of the film, and the use of these films. To provide an iris-colored retroreflective slit thread made by slitting a material.

In the present invention, the light incident on the transparent synthetic resin film passes through the contained glass microspheres, enters the iris layer, is reflected there, passes through the glass microspheres again, and exits to the outside, so retroreflected light It has an iridescent color and its decorative effect is greatly improved. However, the film-like material of the present invention can be cut to an appropriate size and attached to stage costumes, etc., while the slit thread can be used by weaving it into stage costumes, etc., to create an excellent decorative effect. It is something that can be demonstrated.

Next, the present invention will be explained based on the drawings. FIG. 1 is a partial cross-sectional view showing one embodiment of the iris-colored retroreflective film-like material of the present invention.

(1) is a transparent synthetic resin film, and the film contains a large number of glass microspheres (2). An iris layer (8) is formed on one side of the film (1).

A transparent synthetic resin film (1) containing glass microspheres (2) is a film-forming synthetic resin containing glass microspheres (2).
It can be obtained by mixing and forming the mixture into a film by an appropriate film forming method such as an extrusion method or a casting method. Synthetic resins for film formation include polyester, polyamide, polyvinyl chloride, polyethylene,
Polypropylene, polycarbonate, polymethyl methacrylate, ethyl cellulose, cellulose triacetate, polyvinyl fluoride, polyvinylidene fluoride, etc. are used. The film (1) may be colorless or colored as long as it is transparent.

The thickness of the film (1) is usually about 40 to 200p, although it depends on the size of the glass microspheres (2).

As the glass microspheres (2), those having a refractive index of about 1.7 to 2.4 and an average particle size of about 20 to 150 μm are preferably used because of their excellent retroreflectivity.

It is preferable that the i5Sm microspheres (2) are arranged on the same plane in the film (1) so that they do not overlap in the thickness direction. Therefore, the diameter of the glass microspheres (2) is The thickness is preferably about 172 to 64 mm. Further, from the viewpoint of improving retroreflectivity, it is preferable to arrange the glass microspheres (2) as densely as possible, but if uneven retroreflection occurs, they may be arranged sparsely.

Various materials can be used as the iris layer (3), but the main ones are as follows.

(1) Single-layer thin film or laminated thin film of one or more iris substances such as copper iodide, lead bromide, magnesium fluoride, zinc sulfide, antimony oxide, aluminum fluoride, and titanium oxide.

These thin films are produced by vapor deposition methods (vacuum vapor deposition method, sputtering method,
Titanium oxide or the like may be formed from titanium tetrachloride or the like by a vapor phase chemical deposition method or the like. The thickness of these thin sheets is usually about 5 to 200 mμ.

(2) +! It consists of a combination of a thin film of the iris material described in iJki (]) and a thin film of gold 4. A second example of this type of iris layer
- Shown in Figure 4. □ In Figures 2 to 4, the arrow indicates that the film (1) is laminated on this side.

The iris layer in Figure 2 consists of a thin metal film C'l with a large thickness so as to have sufficiently strong reflective ability on the back side of the thin film of iris substance.
11 are laminated. The thickness of the gold R thin film 0D is about 50 to 150 mp. Metals used include aluminum, zinc, chromium, nickel, bismuth, tin,
Examples include silver, gold, copper, platinum, palladium, indium, and rhodium. The metal thin film 0υ is usually formed by a vapor deposition method.

The iris layer shown in FIG. 3 is made by laminating a thin semi-transparent metal thin film 02 that can transmit light on the front surface of a thin film of iris material. The metal thin film Oa has a thickness of about 1 to 20 mμ and a visible light transmittance of about 60 to 70%. The metal used for the metal thin film C3X5, the formation method, etc.
Same as D.

The iris layer shown in FIG. 4 is made by laminating a thin metal film θ■ on the front surface of a thin film 01 of iris material, and a thin metal film Oυ on the back surface.

(3) As shown in FIG. 5, the iris substance thin film O0 in the iris j-deaf in FIG. 4 is replaced with an interference resin film Z. The iris layer with this structure works on the principle of a reflective interference filter (when the optical thickness of the transparent thin film corresponds to an odd multiple of the quarter wavelength of the light beam, the reflectance for that wavelength is maximum)
The reflection peak can be changed over a wide range by utilizing the non-uniformity of the thickness of the resin film formed by the coating method. The interference resin film (c) is an uncolored or colored transparent coating layer made of 2) a cell p-suce, acrylic resin, alkyd resin, epoxy resin, etc., and its thickness is usually 1.5μ or less. A desired iris gloss can be achieved by appropriately selecting the optical thickness. In addition, the interference resin film (to)
By actively increasing the non-uniformity of the film thickness by, for example, providing unevenness, a more vivid iris luster can be obtained.

A top coat layer of an appropriate resin may be applied on the iris layer (3) to improve its durability. Alternatively, an adhesive layer may be provided on the iris layer (3), and the film-like material of the present invention may be used by being attached to other articles such as paper, synthetic resin film, synthetic paper, synthetic leather, fabric, metal plate, etc. You can also do this.

Further, a colorless or colored transparent top coat layer may be provided on the surface of the film (1) opposite to the iris layer (3).

As shown in FIG. 6, the film-like material may be formed into a two-ply structure by laminating two sheets with the iris layer (8) facing inside with an adhesive layer (4) interposed therebetween.

By slitting the film-like material, the iris-colored retroreflective slit yarn of the present invention can be changed. The width of the slit thread is usually 0.
It is about 15 to 3 mm. This slit thread may be used as it is, or it may be used as a twisted gold and silver thread by round twisting it with other fibers, or by twisting it into hagoromo or taski twists in the same way as conventional twisted gold and silver threads.

Alternatively, a pattern may be expressed in advance before the film-like material is slit, and the pattern may be used as a foil to reproduce the pattern in the fabric during weaving.

Next, the present invention will be explained with reference to Examples.

Example 1 100 parts by weight of internally plasticized polyvinyl chloride with an average particle size of 50
65 parts by weight of glass microspheres having a pz refractive index of 2.6 were added, thoroughly kneaded, and then extruded to obtain a polyvinyl chloride film with a thickness of 80p.

A copper iodide vapor deposited layer with a thickness of 25 μm was formed on one side of this film by vacuum deposition, and a top coat layer of melamine-alkyld resin with a thickness of 2 μm was formed thereon to obtain an iris-colored retroreflective film.

Example 2 A film-like product was produced in the same manner as in Example 1, except that a 100-mμ thick adhesive layer was formed on the copper iodide vapor-deposited layer by vacuum evaporation, and then a top coat layer was formed. I got it.

Example 6 An aluminum vapor deposited layer with a thickness of 20 fnμ was formed on one side of the polyvinyl chloride film obtained in Example 1 by a vacuum deposition method, and an aluminum vapor deposited layer with a thickness of 0.5 μm was formed using a gravure coater.
A coating layer of polymethyl methacrylate of μ was formed, and then a 100 mp thick aluminum vapor deposited layer was formed thereon by vacuum evaporation, and then a top coat layer similar to that in Example 1 was formed thereon to obtain a film-like product. .

Example 4 Two sheets of the film-like material obtained in Example 6 (before the top coat layer was formed) were pasted together with the aluminum vapor-deposited layer side inside using a polyurethane adhesive to form a film-like material. I got it.

Example 5 The film-like materials obtained in Examples 1 to 4 were slit into a width of 1.5 m using a micro slitter to obtain four types of slit threads.

The film-like products and slit threads obtained in Examples 1 to 5 all exhibited retroreflected light with iris luster, and their decorative effects were extremely excellent.

[Brief explanation of drawings]

FIG. 1 is a partial cross-sectional view showing an embodiment of the iris-colored retroreflective film of the present invention, FIGS. 2 to 5 are partial cross-sectional views showing various aspects of the iris layer used in the present invention, and FIG. FIG. 3 is a partial cross-sectional view showing another embodiment of the iris-colored retroreflective film of the present invention. (Main symbols in the drawings) (1) Synthetic resin film (2) Nigaras microspheres (8): Iris layer Figure 1 Figure O 6

Claims (1)

[Scope of Claims] 1. An iris-colored retroreflective film product comprising an iris layer formed on one side of a transparent synthetic resin film containing glass microspheres. 2 Translucent water containing glass microspheres! A highly colored retroreflective film-like product made by laminating a film-like product with an iris layer on one side of an IJ synthetic fat-filled film with the iris layer on the inside. 6. An iris-colored retroreflective slit yarn that is a film-like slit yarn formed by forming an iris layer on one side of a transparent synthetic resin film containing glass microspheres. 4. An iris-colored retroreflective slit yarn, which is a slit yarn made by laminating a film-like material formed by forming an iris layer on one side of a transparent synthetic resin film containing glass microspheres with the iris layer inside.