JP2019110060A - Translucent incombustible material and lighting cover - Google Patents

Abstract

To provide a translucent incombustible material and a lighting cover which suppresses appearance of a Moire fringe and which has sufficient durability.SOLUTION: A translucent incombustible material used as a lighting cover according to the present invention includes: a base layer 10; and a cover layer 20 superposed on the base layer 10 with an anchor material 30 in between. In the translucent incombustible material A, the base layer 10 is formed of synthetic resin and the cover layer 20 is formed of silicone resin, the anchor material 30 is a glass cloth having a gap part, at least part of the base layer 10 is in contact with the cover layer 20 with the gap part in between, and the anchor material 30 has a part entering into the base layer 10 to be fixed by the synthetic region and has another part entering into the cover layer 20 to be fixed by the silicone resin.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a translucent incombustible material and a cover for illumination, and more specifically, an illumination composed of a noncombustible incombustible nonflammable material and a translucent incombustible material which suppresses generation of moire fringes and has sufficient durability. For the cover.

In the illumination, a so-called illumination cover is used to protect the light source and to suppress the glare of the light source to widen the light.
The illumination cover generally has a predetermined light transmittance, and is attached to cover the light source at a fixed distance from the light source.

By the way, in recent years, from the viewpoint of fire protection, a non-combustible lighting cover is required.
Therefore, a so-called light transmitting non-combustible material having not only light transmitting properties but also non-combustibility is adopted as the material of the illumination cover.

For example, as a cover for lighting, there is known a noncombustible lighting cover comprising a laminate including a polytetrafluoroethylene resin-impregnated glass cloth sheet, a hot-melt moldable fluorine-containing resin layer, a glass cloth and a low smoking resin layer. (See, for example, Patent Document 1).
In addition, as a translucent noncombustible material, a multilayer resin sheet (for example, refer to Patent Document 2) or a synthetic resin layer laminated using a silicone resin-containing glass cloth sheet and a polycarbonate resin sheet is bonded to both sides of the synthetic resin layer. Translucent members (see, for example, Patent Documents 3 and 4) and the like are known which are formed of a laminate including the above-described glass cloth.

JP 2007-220561 A Unexamined-Japanese-Patent No. 2015-110331 JP, 2016-68526, A JP, 2016-107564, A

However, the illumination cover described in Patent Document 1 has a problem in that moiré fringes are generated and a problem in that the smoke generating property is high at the time of combustion.
Moreover, in the translucent incombustible material of the said patent document 2, the silicone resin containing glass cloth sheet and the polycarbonate resin sheet are laminated | stacked, and the translucent incombustible material of the said patent document 3 or 4 is mentioned. Although the synthetic resin layer and the glass cloth are laminated, in any case, since the adhesiveness between the silicone resin or the glass cloth and the polycarbonate resin is inferior, these light transmitting noncombustible materials have sufficient durability. I can not say.

  The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a nonflammable light transmitting noncombustible material and a cover for illumination which suppress generation of moire fringes and have sufficient durability.

  The present inventors diligently studied to solve the above problems, and using synthetic resin and silicone resin, they not only laminate them but also further comprise an anchor material physically made to penetrate them. As a result, the inventors have found that the above problems can be solved, and have completed the present invention.

  The present invention is, (1) a translucent noncombustible material used as a cover for lighting, comprising a base layer and a cover layer laminated on the base layer via an anchor material, the base layer being made of a synthetic resin, and the cover layer And the anchor material is a glass cloth having a void, and at least a part of the base layer is in contact with the cover layer via the void, and a part of the anchor material penetrates into the base layer. The light transmitting noncombustible material is fixed by a synthetic resin, and the other part penetrates into the cover layer and is fixed by a silicone resin.

  The present invention resides in (2) the light-transmissive incombustible material according to the above (1), wherein the thickness of the base layer is 150 to 400 μm and the thickness of the cover layer is 40 to 600 μm.

  The present invention relates to (3) a translucent noncombustible material used as a cover for illumination, comprising: a base layer; a first cover layer laminated to the base layer on one side via a first anchor material; A second cover layer laminated on the surface via a second anchor material, the base layer is made of a synthetic resin, the first cover layer and the second cover layer are both made of a silicone resin, and the first anchor material is a first The second anchor material is a glass cloth having a second void portion, and at least a part of the base layer is in contact with the first cover layer via the first void portion. At least a portion of the base layer is in contact with the second cover layer via the second void portion, a portion of the first anchor material intrudes into the base and is fixed by the synthetic resin, and the other portion is the first cover Penetrate into the layer and fixed by silicone resin, Some of the anchor material are secured by invades synthetic resin in the base, lies in translucent incombustible other portion is fixed by a silicone resin penetrates into the second cover layer.

  The present invention resides in the light-transmissive incombustible material according to the above-mentioned (3), wherein the thickness of the (4) base layer is 150 to 400 μm, and the thickness of the first cover layer and the second cover layer is 40 to 600 μm.

  The present invention resides in (5) the translucent incombustible material according to any one of the above (1) to (4), wherein the synthetic resin is a polycarbonate resin.

  This invention exists in the translucent incombustible material as described in any one of said (1)-(5) whose porosity of (6) glass cloth is 1% or more.

  This invention exists in the translucent incombustible material as described in any one of said (1)-(6) whose (7) total light transmittance is 40% or more.

  The present invention is, (8) the light-transmissive incombustible material according to any one of the above (1) to (7), which has a semi-cylindrical main body, and protrudes outward from both sides of the main body. It exists in the lighting cover which consists of the

By using a synthetic resin as a base layer and using a silicone resin as a cover layer, the translucent noncombustible material of the present invention can suppress the generation of moire fringes. The synthetic resin is preferably a polycarbonate resin from the viewpoint of strength, moldability and transparency.
In addition to this, by using a glass cloth as an anchor material, a translucent noncombustible material can be made nonflammable.
In addition, in this specification, "incombustible" means what is judged to be "extreme flame retardance" or "incombustibility" by the cone calorimeter heat buildup test which is the combustibility standard of the material for rail vehicles.

In the light transmitting non-combustible material of the present invention, by making the base layer and the cover layer laminated via the anchor material, it is possible to have appropriate light transmitting property.
In addition, since the anchor material penetrates the base layer and the cover layer to physically fix the base layer and the cover layer, the cover layer can be prevented from peeling off from the base layer, and the durability is sufficient. It can be

  At this time, by setting the thickness of the base layer to 150 to 400 μm and the thickness of the cover layer to 40 to 600 μm, the anchor effect (the anchoring effect) can be reliably exhibited.

In the light transmitting noncombustible material of the present invention, generation of moire fringes can be suppressed by using a synthetic resin as the base layer and using a silicone resin as the first cover layer and the second cover layer. The synthetic resin is preferably a polycarbonate resin from the viewpoint of strength, moldability and transparency.
In addition to this, by using a glass cloth as the first anchor material and the second anchor material, the translucent noncombustible material can be reliably made incombustible, and the breaking strength can also be improved.

In the translucent noncombustible material of the present invention, the base layer and the first cover layer are laminated via the anchor material, and the base layer and the second cover layer are laminated via the second anchor material. It can have moderate light transmission.
In addition, the first anchor material is made to penetrate the base layer and the first cover layer to physically fix the base layer and the first cover layer, and the second anchor material is made to penetrate the base layer and the second cover layer to make the base layer and the second cover. Since the layers are physically fixed, it is possible to prevent occurrence of a situation such as peeling of the first cover layer or the second cover layer from the base layer, and it is possible to have sufficient durability.
Furthermore, since the front and back of the base layer is covered with the silicone resin, the stain resistance, oxidation resistance and heat resistance are also improved.

  At this time, by setting the thickness of the base layer to 150 to 400 μm and setting the thicknesses of the first cover layer and the second cover layer to 40 to 600 μm, the anchor effect can be reliably exhibited.

  In the light transmitting noncombustible material of the present invention, by setting the porosity of the glass cloth to 1% or more, the synthetic resin or silicone resin easily intrudes into the space of the glass cloth, so that the so-called anchor effect is further exhibited. Is possible.

  In the light transmitting noncombustible material of the present invention, the brightness can be sufficiently ensured by setting the total light transmittance to 40% or more.

In the illumination cover of the present invention, since the above-mentioned light transmitting noncombustible material is used, the occurrence of moire fringes is suppressed, and the nonflammable material has sufficient durability.
Moreover, since it consists of a semi-cylindrical main-body part and the edge part which each protruded in the outward direction from the both sides of this main-body part, it can be used suitably as a cover of the illumination extended to linear form.
Therefore, illumination extending in a line is adopted, and it is suitably used for illumination for underground corridor lighting, interior lighting of a bus, interior lighting of a railway, interior lighting of an aircraft, etc. where fire resistance is required.

FIG. 1: is a schematic cross section which shows the translucent nonflammable material which concerns on 1st Embodiment. FIG. 2: is a schematic cross section which shows the translucent nonflammable material which concerns on 2nd Embodiment. (A) of FIG. 3 is a perspective view which shows one Embodiment of the cover for illumination which concerns on this embodiment, (b) is the side view.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings as needed. In the drawings, the same elements will be denoted by the same reference signs and redundant description will be omitted. Further, the positional relationship such as upper, lower, left and right is based on the positional relationship shown in the drawings unless otherwise specified. Furthermore, the dimensional ratio in the drawings is not limited to the illustrated ratio.

The translucent noncombustible material according to the present invention is used as a cover for illumination.
The shape of the light transmitting noncombustible material in this case can be appropriately selected from a box shape, a dome shape, etc. in accordance with the type and shape of the light source. In the present specification, an example of the illumination cover will be described later.

First, a first embodiment of the translucent noncombustible material according to the present invention will be described.
FIG. 1: is a schematic cross section which shows the translucent nonflammable material which concerns on 1st Embodiment.
As shown in FIG. 1, the translucent noncombustible material A according to the first embodiment includes a base layer 11 and a cover layer 20 laminated on the base layer 11 with an anchor member 30 interposed therebetween.

In the translucent noncombustible material A, the base layer 11 and the cover layer 20 are laminated, and the anchor material 30 is embedded in the boundary portion between the two. For this reason, it has appropriate transparency, and at the same time, it is possible to suppress the glare of the light source and spread the light wide.
Further, the light source itself can be protected by arranging the light source so as to cover the light source at a certain distance from the light source.

In the translucent noncombustible material A, as described later, a synthetic resin is used as the base layer 11, and a silicone resin is used as the cover layer 20. Thereby, the generation of moire fringes can be suppressed.
Further, a glass cloth is used as the anchor member 30. Thereby, the translucent nonflammable material A can be made nonflammable.

  As described above, in the translucent noncombustible material A, at least a part of the base layer 10 is in contact with the cover layer 20 via the unshown air gap of the anchor member 30, and a part of the anchor material 30 is the base layer. 10 is penetrated and fixed by a synthetic resin, and the other part is penetrated into the cover layer 20 and fixed by silicone resin. Thereby, the occurrence of a situation such as peeling of the cover layer 20 from the base layer 10 can be prevented, and sufficient durability can be provided.

The thickness of the light transmitting non-combustible material A is preferably 190 μm to 1000 μm, more preferably 190 to 700 μm, and still more preferably 400 to 600 μm. In this case, the weight can be reduced, the light transmittance is excellent, and moire fringes are not easily generated.
If the thickness of the translucent incombustible material A is less than 200 μm, the strength may be insufficient compared to the case where the thickness is in the above range, and the translucent incombustible material A When the thickness exceeds 1000 μm, the weight is increased and the workability is reduced as compared with the case where the thickness is in the above range.

The total light transmittance of the light transmitting non-combustible material A is preferably 40% or more, more preferably 50% to 90%, still more preferably 60% to 85%, and 60% to 70%. Even more preferably,%. In this case, the brightness can be sufficiently secured, and the power consumption of the light source can be reduced as much as possible.
The "total light transmittance" is measured using a light transmittance measurement apparatus "Haze Guard II" (trade name) manufactured by Toyo Seiki Seisakusho in accordance with JIS-K7105 "optical property test of plastic". Value.

Each component will be described in more detail below.
(Base layer)
In the translucent noncombustible material A, the base layer 10 is made of a synthetic resin, and is preferably a thermoplastic resin from the viewpoint of recycling.
As such a thermoplastic resin, polycarbonate (PC), polypropylene (PP), polyethylene (PE), polystyrene (PS), polyethylene terephthalate (PET), polyphenylene ether (PPE), polyamide (PA), ABS resin, acrylic resin, etc. Can be mentioned.
Among these, the thermoplastic resin is particularly preferably a polycarbonate resin. In this case, the base layer 10 is excellent in light transmittance and strength. In addition, the polycarbonate resin is also excellent in moldability, and thus has an advantage that the base layer 10 can be easily molded.

The thickness of the base layer 10 is preferably 150 to 400 μm, and more preferably 150 to 250 μm.
If the thickness of the base layer 10 is less than 150 μm, there is a defect that the durability is insufficient as compared with the case where the thickness is in the above range, and if the thickness of the base layer 10 exceeds 400 μm, the thickness is in the above range As compared with the case of (1), the weight is increased and the handling is inferior, and the total light transmittance may be reduced.

The MI value of the synthetic resin is preferably 8 to 65, more preferably 8 to 45, and still more preferably 8 to 25.
By setting the MI value of the synthetic resin in the above range, the moldability is excellent, and air hardly enters during molding.
In addition, MI value (melt index value) is a value measured according to the method prescribed | regulated by JIS-K7210, and is an index showing the fluidity of a synthetic resin.

Assuming that the refractive index of the base layer 10 (synthetic resin) is n _P and the refractive index of an anchor material (glass cloth) described later is n _G , the value of | n _P −n _G | It is preferable that it is the following and it is more preferable that it is 0.03 or less. In this case, since the difference in refractive index is small, the light transmittance is improved, and moire fringes are less likely to occur.
In addition, a refractive index is the value measured according to the method of calculating | requiring the refractive index of the plastics prescribed | regulated to JIS-K7142.

(Cover layer)
In the translucent noncombustible material A, the cover layer 20 is made of silicone resin. In particular, those showing optical characteristics such as light transmittance are suitably used.
Such silicone resin is preferably produced using a silicone oligomer.
In addition, the silicone oligomer may have a structural unit called M unit, D unit, T unit, or Q unit.
For example, as the silicone oligomer, one having T unit / (T unit + D unit) of 50 mol%, and in another aspect, one having T unit / (T unit + D unit) of 10 to 50 mol% . When using these as a silicone resin, the obtained silicone resin will have high flexibility.

  The silicone oligomer preferably has a methyl group, a phenyl group, a methylphenyl group and derivatives thereof in its structure. In this case, the adhesion to the glass cloth is improved.

  Examples of silicone oligomers include X40-9225, KR-401, KR-510 (Shin-Etsu Chemical Co., Ltd.), B0446, B1410, B2733, B2230 (Momentive Performance Materials, Inc.), AY42, 2402, 3074 (Toray Dow Corning) And IC 368 (Asahi Kasei Wacker Silicone Co., Ltd.) and the like.

The thickness of the cover layer 20 is preferably 40 to 600 μm, and more preferably 40 to 350 μm.
If the thickness of the cover layer 20 is less than 40 μm, the water repellent effect and the like by the cover layer 20 may not be sufficiently exhibited as compared with the case where the thickness is within the above range. When it exceeds, compared with the case where thickness is in the said range, while a weight becomes large and handling property worsens, a total light transmittance may be reduced.

  The amount of the silicone resin is preferably 40 parts by mass to 70 parts by mass, and more preferably 50 parts by mass to 60 parts by mass with respect to 100 parts by mass of an anchor material (glass cloth) described later. In this case, the light transmittance is improved and moire fringes are less likely to occur.

  The refractive index of the cover layer 20 (silicone resin) is preferably 1.35 or more, more preferably 1.42 or more, and still more preferably 1.48 or more. In this case, the light transmittance is improved and moire fringes are less likely to occur.

The silicone resin may contain silica particles. In this case, the heat resistance of the silicone resin is improved.
Moreover, it is preferable that the average particle diameter of the primary particle of a silica particle is 6-100 nm.

Fumed silica is suitably used as the silica particles.
Moreover, it is preferable that the specific surface area by BET method of fumed silica is 100-300 m < ² > / g.

(Anchor material)
In the translucent noncombustible material A, the anchor material 30 is made of a woven or braided glass cloth whose tissue has a void. In particular, a glass cloth having translucency is preferably used.
As glass fiber used for glass cloth, E glass, D glass, T glass, C glass, ECR glass, A glass, L glass, S glass, H glass etc. are mentioned, for example.

The glass cloth has a void. That is, the base layer 10 and the cover layer 20 are in contact with each other through the void portion.
The porosity of the glass cloth is preferably 1% or more, more preferably 10 to 90%, and still more preferably 20 to 80%.
By setting the porosity of the glass cloth to 1% or more, the synthetic resin or the silicone resin easily intrudes into the pores of the glass cloth, so that it is possible to further exhibit a so-called anchor effect.

The anchor member 30 preferably has a weight of 100 to 300 g / m ² .
When the weight of the anchor member 30 is less than 100 g / m ² , sufficient anchor effect may not be exhibited as compared with the case where the weight is within the above range, and the weight of the anchor member 30 is 300 g / m ² When it exceeds, compared with the case where weight is in the said range, while weight becomes large and handling property worsens, a total light transmittance may be reduced.
Moreover, it can suppress that the total light transmittance falls in this case.

The glass cloth may be provided with a silane coupling agent.
As such a silane coupling agent, epoxysilanes, aminosilanes, chlorosilanes, vinylsilanes, (meth) acrylsilanes and the like can be mentioned.

The translucent noncombustible material A according to the first embodiment is manufactured by forming the base layer 10 from one side of the anchor material 30 and forming the cover layer 20 from the other side.
For example, the base layer 10 can be formed by applying a liquid synthetic resin to one side of the anchor member 30 by a method such as coating or spraying, evaporating the solvent by heating, and then air cooling. Alternatively, when the synthetic resin is a thermoplastic resin, the anchor material 30 and the film-like thermoplastic resin are brought into surface contact, the thermoplastic resin is made to permeate the anchor material 30 by thermocompression bonding, and then air cooling is performed. Can be formed.
At this time, at least a part of the other side surface of the anchor member 30 is exposed.

  Then, a silicone oligomer is applied to the other side of the anchor member 30 by a method such as coating or spraying, and curing is performed by heating, whereby the translucent noncombustible material A on which the cover layer 20 is formed can be manufactured. .

Next, a second embodiment of the translucent noncombustible material according to the present invention will be described.
FIG. 2: is a schematic cross section which shows the translucent nonflammable material which concerns on 2nd Embodiment.
As shown in FIG. 2, the translucent noncombustible material B according to the second embodiment includes a base layer 11, and a first cover layer 21 stacked on the base layer 11 with a first anchor member 31 on one side thereof, And a second cover layer 22 stacked on the other surface of the base layer 11 via the second anchor material 32.

In the translucent noncombustible material B, the first cover layer 21, the base layer 11, and the second cover layer 22 are stacked in this order, and the first anchor member 31 is formed at the boundary between the first cover layer 21 and the base layer 11. The second anchor member 32 is embedded in the boundary between the base layer 11 and the second cover layer 22. For this reason, it has appropriate transparency, and at the same time, it is possible to suppress the glare of the light source and spread the light wide.
In addition, the light source can be protected by placing the light source at a distance from the light source and covering the light source.

Similarly to the translucent incombustible material A according to the first embodiment, in the translucent incombustible material B, a synthetic resin is used as the base layer 11, and a silicone resin is used as the first cover layer 21 and the second cover layer 22. Thereby, the generation of moire fringes can be suppressed.
Further, a glass cloth is used as the first anchor member 31 and the second anchor member 32. Thereby, the translucent incombustible material B can be made more nonflammable, and the breaking strength can also be improved.

As described above, in the translucent noncombustible material B, at least a part of the one surface side of the base layer 11 is in contact with the first cover layer 21 via the void portion (not shown) of the first anchor member 31; A part of the first anchor member 31 intrudes into the base layer 11 and is fixed by the synthetic resin, and the other part intrudes into the first cover layer 21 and is fixed by the silicone resin.
In addition, at least a portion of the other surface side of the base layer 11 is in contact with the second cover layer 22 via a void (not shown) of the second anchor member 32, and a portion of the second anchor member 32 is in the base layer 11. , And fixed by a synthetic resin, and the other part penetrates into the second cover layer 22 and is fixed by a silicone resin.
As a result, it is possible to prevent the occurrence of a situation where the first cover layer 21 and the second cover layer 22 peel off from the base layer 11, and it is possible to have sufficient durability.
In addition, since the front and back of the base layer 11 is covered with the silicone resin, the light transmitting non-combustible material B is also improved in antifouling property, oxidation resistance and heat resistance.
Incidentally, in the translucent non-combustible material B, the weight of the first anchor 31 and the second anchor material 32 is the same as that of the anchor material 30 described above. In this case, the anchor effect can be reliably exhibited.

The thickness of the light transmitting non-combustible material B is preferably 200 μm to 1000 μm, more preferably 200 to 700 μm, and still more preferably 400 to 600 μm. In this case, the weight can be reduced, the light transmittance is excellent, and moire fringes are not easily generated.
If the thickness of the translucent incombustible material B is less than 200 μm, the strength may be insufficient as compared with the case where the thickness is in the above range. When the thickness exceeds 1000 μm, the weight is increased and the workability is reduced as compared with the case where the thickness is in the above range.

  The total light transmittance of the light transmitting non-combustible material B is preferably 40% or more, more preferably 50% to 90%, still more preferably 60% to 85%, and 60% to 70%. Even more preferably,%. In this case, the brightness can be sufficiently secured, and the power consumption of the light source can be reduced as much as possible.

About each composition of light transmission nonflammable material B, since it is the same as that of light transmission nonflammable material A concerning a 1st embodiment mentioned above, explanation is omitted.
Incidentally, the first cover layer 21 and the second cover layer 22 of the translucent incombustible material B have the same configuration as the cover layer 20 of the translucent incombustible material A, and the first anchor material of the translucent incombustible material B 31 and the 2nd anchor material 32 are the same composition as anchor material 30 of translucent incombustible material A.

The light transmitting non-combustible material B according to the second embodiment is formed so as to sandwich the base layer 11 between the first anchor material 31 and the second anchor material 32, and the base material 11 of the first anchor material 31 and the second anchor material 32 It manufactures by forming the 1st cover layer 21 and the 2nd cover layer 22 corresponding to an opposite side, respectively.
For example, a liquid synthetic resin is applied to one side of the first anchor material 31 by a method such as coating, spray, etc., the second anchor material 32 is covered from above, and the solvent is evaporated by heating, and then air cooling As a result, the base layer 11 is formed between the first anchor material 31 and the second anchor material 32. Alternatively, when the synthetic resin is a thermoplastic resin, the thermoplastic resin is sandwiched between the first anchor material 31 and the second anchor material 32 by thermocompression bonding, and the first anchor material 31 and the first anchor material 31 are The base layer 11 can be formed between the first anchor material 31 and the second anchor material 32 by infiltrating the two anchor materials 32 and air cooling thereafter.
At this time, at least a part of the surface of the first anchor member 31 and the second anchor member 32 opposite to the base layer 11 is exposed.

  Then, a silicone oligomer is applied to the side opposite to the base layer 11 of each of the first anchor material 31 and the second anchor material 32 by a method such as coating, spraying or the like, and cured by heating to form the first cover layer 21 and The translucent noncombustible material B in which the 2nd cover layer 22 was formed can be manufactured.

Next, an embodiment of a lighting cover according to the present invention will be described.
(A) of FIG. 3 is a perspective view which shows one Embodiment of the cover for illumination which concerns on this embodiment, (b) is the side view.
As shown in (a) and (b) of FIG. 3, the illumination cover C according to the present embodiment includes a semi-cylindrical main body portion 41 and edge portions protruding outward from both sides of the main body portion 41. And 42.
Further, the main body portion 41 and the edge portion 42 are integrated, and the whole is made of the above-described translucent noncombustible material.

In the illumination cover C according to the present embodiment, since the above-described translucent noncombustible material is used, the occurrence of moire fringes is suppressed, and the nonflammable material has sufficient durability.
Moreover, since it consists of the semi-cylindrical main-body part 41 and the edge part 42 each protruded in the outward direction from the both sides of this main-body part 41, it can utilize suitably as a cover of the illumination extended in a line form.

Since the illumination cover C is configured to extend in a straight line, it is suitably used as a cover for illumination extending in a line.
In addition, since the lighting cover C is noncombustible, it is suitably used for lighting of underground passages, in-vehicle lighting of buses, in-vehicle lighting of railway vehicles, in-flight lighting of aircraft, etc. where nonflammability is required. .

  As mentioned above, although the suitable embodiment of the present invention was described, the present invention is not limited to the above-mentioned embodiment.

  In the case of using the translucent noncombustible material A according to the present embodiment as a cover for illumination, the base layer 10 side may be used as the light source side, and the cover layer 20 side may be used as the light source side.

The illumination cover C according to the present embodiment includes a cylindrical main body portion 41 and edge portions 42 respectively projecting outward from both sides of the main body portion 41, but the structure is not limited thereto.
For example, the shape of the entire lighting cover may be dome-like, disk-like, cylindrical or the like.

The light-transmissive non-combustible material of the present invention can be suitably used as a lighting cover for which fire resistance is required, such as a vehicle lighting capa and a building lighting cover.
According to the light-transmissive incombustible material or the illumination cover of the present invention, it is possible to suppress the generation of moire fringes and to have sufficient durability.

10, 11 · · · Base layer 20 · · · cover layer 21 · · · first cover layer (cover layer)
22 ・ ・ ・ Second cover layer (cover layer)
30: Anchor material 31: First anchor material (anchor material)
32 ・ ・ ・ Second anchor material (anchor material)
41 ··· Main body 42 · · · Edges A, B ··· Translucent nonflammable material

Claims (8)

In the translucent noncombustible material used as a cover for lighting,
Base layer,
A cover layer laminated to the base layer via an anchor material;
Equipped with
The base layer is made of synthetic resin,
The cover layer is made of silicone resin,
The anchor material is a glass cloth having a void,
At least a portion of the base layer is in contact with the cover layer via the air gap;
A translucent incombustible material in which a part of the anchor material intrudes into the base layer and is fixed by the synthetic resin, and the other part intrudes into the cover layer and is fixed by the silicone resin. The thickness of the base layer is 150 to 400 μm,
The thickness of the said cover layer is 40-600 micrometers, The translucent incombustible material of Claim 1 characterized by the above-mentioned. In the translucent noncombustible material used as a cover for lighting,
Base layer,
A first cover layer laminated on the base layer via a first anchor material on one side;
A second cover layer laminated to the base layer via the second anchor material on the other side;
Equipped with
The base layer is made of synthetic resin,
The first cover layer and the second cover layer are both made of silicone resin,
The first anchor material is a glass cloth having a first void portion,
The second anchor material is a glass cloth having a second void portion,
At least a portion of the base layer is in contact with the first cover layer via the first void portion,
At least a portion of the base layer is in contact with the second cover layer via the second void portion,
A part of the first anchor material intrudes into the base and is fixed by the synthetic resin, and the other part intrudes into the first cover layer and is fixed by the silicone resin.
A translucent noncombustible material in which a part of the second anchor material intrudes into the base and is fixed by the synthetic resin, and the other part intrudes into the second cover layer and is fixed by the silicone resin. The thickness of the base layer is 150 to 400 μm,
The thickness of the said 1st cover layer and the said 2nd cover layer is 40-600 micrometers, The translucent non-combustible material of Claim 3 characterized by the above-mentioned.   The translucent noncombustible material according to any one of claims 1 to 4, wherein the synthetic resin is a polycarbonate resin.   The porosity of the said glass cloth is 1% or more, The translucent non-combustible material of any one of Claims 1-5.   The total light transmittance is 40% or more, The light transmission nonflammable material of any one of Claims 1-6. It consists of a translucent nonflammable material of any one of Claims 1-7,
A lighting cover comprising: a semi-cylindrical main body; and an edge protruding outward from each side of the main body.

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