JP2021146622A - Film material - Google Patents

Abstract

To provide a film material which can easily provide one having a required light transmittance.SOLUTION: A translucent film material 10 has a base material 11 including glass cloth or glass nonwoven fabric of a translucent glass fiber, and a surface material 12 that is laid on one side of the base material 11 and includes a triaxial fabric including a glass fiber. An adhesive layer 13 is interposed between the base material 11 and the surface material 12. The surface material 12 has an area percentage of gaps 12b of 5% or more and 50% or less, and is formed of the glass fiber cured with resin.SELECTED DRAWING: Figure 1

Description

The present invention relates to a film material having light transmission.

For example, as a ceiling material having light transmission, a film material mainly containing a glass fiber woven fabric is currently used, and it is also lightweight and nonflammable (see, for example, Patent Document 1 below). .. In a ceiling material (light film ceiling material) using such a light-transmitting film material, glare can be alleviated by diffusing and transmitting light from a light source located inside. ing.

Japanese Unexamined Patent Publication No. 2019-214177

The light film ceiling material as described above is the distance between a small space such as a residential room, an office meeting room, a waiting room in a station building, etc., which is relatively close to the light source, and a light source such as a gymnasium or a commercial facility. However, the required light transmittance is different in a large space that is relatively far away. Since it is necessary to use glass fiber woven fabrics having different densities and thicknesses in manufacturing the light film ceiling materials having different light transmittances required in this way, there is a problem that labor and cost are required. rice field.

Such problems are not limited to the film materials used for the optical film ceiling materials as described above, and for example, wall surfaces such as fittings and waist walls, lighting furniture such as three-sided mirrors, foot lighting, guide lights, etc. The same can occur even in the case of a film material used for indirect lighting or the like in which a lighting fixture is stored inside.

Therefore, it is an object of the present invention to provide a film material capable of easily obtaining a film having a required light transmittance.

The film material according to the present invention for solving the above-mentioned problems is a light-transmitting film material, which is a triaxial woven fabric laid on one surface of a light-transmitting base material and the base material. The surface material is characterized in that the area ratio of the void portion is 5% or more and 50% or less.

According to the film material according to the present invention, the light transmittance can be set by the area ratio of the void portion of the surface material. Therefore, even if the light transmittance of the base material is the same, the surface materials having different light transmittances are applied. As a result, the light transmittance can be changed, so that the required light transmittance can be easily obtained.

It is sectional drawing which shows the schematic structure of the main embodiment of the film material which concerns on this invention. It is a top view which shows the schematic structure of the surface material of the film material of FIG.

Although the embodiment of the film material according to the present invention will be described with reference to the drawings, the present invention is not limited to the embodiments described based on the drawings.

<Main embodiment>
The main embodiments of the film material according to the present invention will be described with reference to FIGS. 1 and 2.

As shown in FIG. 1, a surface material 12 having a triaxial woven fabric is laid on one surface (upper surface in FIG. 1) of the light-transmitting base material 11. An adhesive layer 13 is interposed between the base material 11 and the surface material 12.

The base material 11 contains a glass cloth of glass fiber or a glass non-woven fabric, and when the mass is 500 g / m ² or less, the weight can be reduced, which is preferable. In the case of glass cloth, it is preferable that the glass cloth is woven with warp and weft of glass fibers so that the opening ratio is 0.5% or more and 1.0% or less and the thickness is 100 μm or more and 1 mm or less. On the other hand, in the case of a glass non-woven fabric, the thickness is preferably 50 μm or more and 150 μm or less.

Further, the base material 11 meets the non-combustible standard. Specifically, for example, a cone calorie meter tester that complies with ISO5660-1 and conforms to the fire resistance test method and performance evaluation standard based on Article 2-9 of the Building Standards Act and Article 108-2 of the Construction Ordinance of the Building Standards Act. In the heat generation test according to (1), the total calorific value (MJ / m ² ) for ^{20 minutes after the start of heating was 4 MJ / m 2} or less, and (2) the maximum heat generation rate for 20 minutes after the start of heating continued for 10 seconds or more. It is preferable that the product has nonflammability that does not exceed 200 kW / m ² and (3) has no cracks or holes penetrating to the back surface, which is harmful to fire protection, for 20 minutes after the start of heating.

As shown in FIGS. 1 and 2, the surface material 12 includes a triaxial woven fabric in which glass fiber threads 12a are woven in a triaxial direction so as to have a gap portion 12b penetrating between one surface and the other surface. The area ratio of the gap portion 12b is adjusted to a range of 5% or more and 50% or less.

The triaxial woven fabric has a thickness of 100 μm or more and 1 mm or less, and a mass of 500 g / m ² or less, which is preferable because weight reduction can be achieved. The surface material 12 is hardened by impregnating the glass fibers of the woven yarn 12a with resin, and has high rigidity. Examples of the impregnating resin include thermoplastic resins, thermosetting resins, and ultraviolet curable resins.

Examples of the thermoplastic resin include polyester resins such as polyethylene terephthalate (PET) resin, polybutylene terephthalate (PBT) resin, polytrimethylene terephthalate (PTT) resin, polyethylene naphthalate (PEN) resin, and liquid crystal polyester resin. Polyetherketone resins such as polyethylene (PE) resin, polypropylene (PP) resin, and thermoplastic resin, styrene resin, polyoxymethylene (POM) resin, polyamide (PA) resin, polycarbonate (PC) resin, and thermoplastic methacrylate (PMMA). ) Resin, polyvinyl chloride (PVC) resin, polyphenylene sulfide (PPS) resin, polyphenylene ether (PPE) resin, modified PPE resin, thermoplastic polyimide (PI) resin, polyamideimide (PAI) resin, polyetherimide (PEI) Resin, Polysulfone (PSU) Resin, Modified PSU Resin, Polyethersulfone (PES) Resin, Polyetherketone (PK) Resin, Polyetherketone (PEK) Resin, Polyetheretherketone (PEEK) Resin, Polyetherketoneketone (PEKK) Fluorine-based resins such as resins, polyarylate (PAR) resins, polyethernitrile (PEN) resins, thermoplastic phenol-based resins, phenoxy resins, polytetrafluoroethylene resins, and polystyrene-based resins, polyolefin-based resins, and polyurethane-based resins. , Polyether-based resin, polyamide-based resin, polybutadiene-based resin, polyisoprene-based resin, fluororesin and other thermoplastic elastomers, copolymers of these, modified products, resins blended with two or more types, and the like.

Examples of the thermosetting resin include phenol resin (PF), epoxy resin (EP), melamine resin (MF), urea resin (UF), unsaturated polyester resin (UP), alkyd resin, and polyurethane (PUR). Examples thereof include thermosetting polyimide (PI).

Examples of the ultraviolet curable resin include acrylic type and epoxy type.

The adhesive layer 13 joins the base material 11 and the surface material 12, and for example, a hot melt adhesive having a solid content of 100% and a moisture-curable type (for example, a polyurethane (PUR) resin) having a solid content of 100% are bonded. Examples thereof include agents, high-viscosity rubber-based adhesives, and high-viscosity urethane resin-based adhesives. Examples of the hot melt adhesive include ethylene-vinyl acetate copolymer resin (EVA resin) and polyamide resin.

When the above-mentioned adhesive is applied to the adhesive layer 13, the base material 11 and the surface material 12 are prevented from entering the pores of the base material 11 and the surface material 12 and the voids 12b of the surface material 12. It is very preferable because it can suppress a decrease in adhesive strength with the lumber. As the high-viscosity rubber-based adhesive or high-viscosity urethane resin-based adhesive, for example, those having a viscosity of 40 Pa · s or more, more preferably 50 Pa · s or more are preferably applied.

The method for producing the film material 10 according to the present embodiment will be described below.
First, the above-mentioned resin (for example, a thermosetting resin) is dissolved or dispersed in a solvent such as water to prepare an impregnating liquid, and the surface material 12 is immersed in the impregnating liquid to immerse the surface material 12 in the textile thread 12a of the surface material 12. The resin is impregnated between the glass fibers of.

As a method of impregnating the resin, for example, a method of immersing the single-wafer-shaped surface material 12 in the impregnating liquid in the container as it is, or a method of running the web-shaped surface material between the paired rolls to which the impregnating liquid is adhered. A method of cutting the web after impregnating the surface material with the impregnating liquid can be mentioned.

Next, the adhesive layer (for example, hot melt adhesive) 13 formed in a mesh shape (or sheet shape) is laminated on one surface of the base material 11, and then the surface material 12 impregnated with the resin is laminated. Subsequently, this is heated (for example, about 100 ° C. × about 30 seconds) to cure the resin and melt the adhesive. As a result, the surface material 12 is cured, and the base material 11 and the surface material 12 are bonded by the adhesive layer 13 to obtain the film material 10.

In the film material 10 according to the present embodiment, the surface material 12 including the triaxial woven fabric having the gap portion 12b in which the thread 12a of the glass fiber is woven in the triaxial direction is formed of a glass cloth or glass containing the glass fiber. Since it is laid on the base material 11 containing the non-woven fabric, the light transmission rate can be set by the area ratio of the void portion 12b of the surface material 12.

That is, when the light transmittance of the base material 11 is Pb, the light transmittance of the surface material 12 is Ps, and the light transmittance of the adhesive layer 13 is Pg, the light transmittance Pf of the film material 10 is the following formula (1). Can be represented by.

Pf = Pb × Ps × Pg (1)

Here, since the light transmittance Pg of the adhesive layer 13 can be virtually ignored, the above equation (1) is substantially limited to the first term and the second term.

Therefore, the light transmittance Pf of the film material 10 is set to a value as required by applying the surface material 12 having a different light transmittance Ps even if the light transmittance Pb of the base material 11 is the same. can do.

Specifically, for example, when the width W of the glass fiber yarn 12a is 4 mm and the weaving angle θ is 60 °, the area ratio of the void portion 12b of the surface material 12 can be set to about 30%. At this time, if the width W of the yarn 12a is reduced or the weaving angle θ is increased, the area ratio of the gap portion 12b of the surface material 12 can be increased. On the other hand, if the width W of the yarn 12a is increased or the weaving angle θ is decreased, the area ratio of the gap portion 12b of the surface material 12 can be reduced.

In this way, the surface material 12 in which the area ratio of the void portion 12b is adjusted to be in the range of 5% or more and 50% or less, that is, the light transmittance Ps is adjusted, is laid on the base material 11 of the light transmittance Pb. By doing so, it is possible to easily obtain a film material 10 having a light transmittance Pf as required.

Specifically, for example, when used for a light film ceiling material in a large space such as a commercial facility or a gymnasium where the distance from the light source is relatively long, the film material 10 having a light transmittance Pf of 50% or more and 90% or less. When used for light film ceiling materials in small spaces such as residential rooms, office meeting rooms, and station building waiting rooms, which are relatively close to the light source, the light transmission rate Pf is 30% or more and 70% or less. When the film material 10 is used for applications that do not require a relatively large amount of light, such as indirect lighting such as foot lighting and guide lights, the film material 10 has a light transmission rate Pf of 10% or more and 50% or less. The surface material 12 in which the light transmission rate Ps is adjusted, that is, the area ratio of the void portion 12b is adjusted is laid on the base material 11 having the light transmission rate Pb.

That is, a plurality of the area ratios of the void portions 12b are arranged within the range of 5% or more and 50% or less to form a series of the surface material 12, in other words, a plurality of light transmittance Ps of the surface material 12 are arranged as a series and a single surface material is provided. By combining with the base material 11 having the light transmittance of Pb, the film material 10 having the desired light transmittance Pf can be obtained.

Therefore, according to the film material 10 according to the present embodiment, the required light transmittance Pf can be easily obtained.

Further, since it is necessary to keep the light transmittance Pb of the base material 11 as high as possible, the density and thickness of the base material 11 become relatively small, and the rigidity of the base material 11 becomes low, but the surface surface. Since the rigidity of the surface material 12 is increased by impregnating the glass fibers of the threads 12a of the woven fabric of the material 12 with a resin and hardening the surface material 12, the surface material 12 can be used as a core material and has sufficient rigidity. Can have.

When the surface material is made of a biaxial (warp, weft) woven fabric, the directions are vertical and horizontal, so that when the resin is impregnated and cured, it tends to bend in the vertical or horizontal direction. .. On the other hand, in the film material 10 according to the present embodiment, since the surface material 12 is made of a triaxial (axial yarn, right-up bias yarn, left-up bias yarn) woven fabric, the directionality is oblique, and thus the resin. When impregnated with and cured, the rigidity can be maintained.

<Other Embodiments>
In the above-described embodiment, the case where it is applied to the optical film ceiling material has been mainly described, but the present invention is not limited to this. As another embodiment, for example, a film material used for a wall surface such as a fitting or a waist wall, lighting furniture such as a three-sided mirror, or indirect lighting for storing a lighting fixture inside such as a foot lighting or a guide light. When it is used as a film material having light transmittance as in the above-mentioned embodiment, it can be applied in the same manner as in the above-described embodiment.

Since the film material according to the present invention can be easily obtained with the required light transmittance, it can be extremely beneficially used industrially.

10 Membrane material 11 Base material 12 Surface material 12a Thread 12b Void part 13 Adhesive layer

Claims (6)

A film material with light transmission
With a light-transmitting base material,
A surface material laid on one surface of the base material and having a triaxial woven fabric,
With
The surface material is a film material characterized in that the area ratio of the void portion is 5% or more and 50% or less. The film material according to claim 1, wherein the fibers of the triaxial woven fabric are cured by a resin. The film material according to claim 1 or 2, wherein the triaxial woven fabric contains glass fibers. The film material according to any one of claims 1 to 3, wherein the base material contains a glass cloth or a glass non-woven fabric. The film material according to any one of claims 1 to 4, wherein an adhesive layer is interposed between the base material and the surface material. The adhesive layer contains at least one of a hot melt adhesive having a solid content of 100%, a moisture-curable adhesive having a solid content of 100%, a high-viscosity rubber-based adhesive, and a high-viscosity urethane resin-based adhesive. The film material according to claim 5, wherein the film material is provided.

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