JP2017222145A - Translucent member and method for producing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a translucent member that has excellent light transmissivity, prevents occurrence of moire fringes, and has reduced smoke emission, and a method for producing such a translucent member.SOLUTION: The present invention provides a translucent member having a synthetic resin layer, and a glass cloth layer bonded to both faces of the synthetic resin layer. The glass cloth layer is a layer impregnated with a silicone resin, and the translucent member has a total light transmittance of 40% or more.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a translucent member and a manufacturing method thereof.

  Conventionally, various types of translucent members used for illumination device covers and the like have been proposed. For example, Patent Document 1 proposes a non-combustible lighting cover made of a laminate including a polytetrafluoroethylene resin-impregnated glass cloth sheet, a hot-melt moldable fluorine-containing resin layer, a glass cloth and polycarbonate.

JP 2007-220561 A

  However, the laminate proposed in Patent Document 1 has a problem that moire fringes are generated on the surface of the lighting cover, and a problem that smoke generation becomes high during combustion.

  The present invention has been made to solve the above problems, and provides a translucent member that is excellent in light transmittance, does not generate moire fringes, and can suppress smoke generation, and a method for manufacturing the same. .

The present invention includes the following.
[1] A translucent member having a synthetic resin layer and glass cloth layers provided on both surfaces of the synthetic resin layer,
The glass cloth layer is a layer impregnated with a silicone resin,
The translucent member, wherein the translucent member has a total light transmittance of 40% or more.
[2] The translucent member according to [1], which has noncombustibility.
[3] The translucent member according to [1] or [2], wherein the silicone resin has at least one of a methyl group, a phenyl group, a methylphenyl group, and derivatives thereof.
[4] The synthetic resin layer is made of polycarbonate (PC), polypropylene (PP), polyethylene (PE), polystyrene (PS), polyethylene terephthalate (PET), polyphenylene ether (PPE), polyamide (PA), ABS resin, and acrylic. The translucent member according to any one of [1] to [3], including at least one resin selected from resins.
[5] A translucent member for a vehicle including the translucent member according to any one of [1] to [4].
[6] The method for producing a translucent member according to any one of [1] to [4],
Disposing glass cloth on both surfaces of the synthetic resin layer, and applying a silicone resin or a silicone oligomer on the surface of the glass cloth opposite to the synthetic resin layer, heating the silicone resin or the silicone oligomer, A method for producing a translucent member, comprising forming a glass cloth layer impregnated with a silicone resin.

  The present invention provides a translucent member that is excellent in light transmissivity, does not generate moire fringes, and is nonflammable.

FIG. 1 is a schematic cross-sectional view showing an example of the translucent member of the present invention. FIG. 2 is a perspective view showing an example of a state in which the translucent member of the present invention is molded. FIG. 3 is a front view showing an example of a state in which the translucent member of the present invention is molded.

(Translucent member)
The translucent member of the present invention will be described. The translucent member of the present invention is a translucent member having a synthetic resin layer and glass cloth layers provided on both surfaces of the synthetic resin layer,
The glass cloth layer is a layer impregnated with a silicone resin,
The translucent member is a translucent member having a total light transmittance of 40% or more.

  The translucent member of the present invention has, for example, the structure shown in FIG. In FIG. 1, the translucent member 10 of this invention has the synthetic resin layer 11 and the glass cloth layers 12 and 13 provided in the both surfaces. The glass cloth layers 12 and 13 are layers impregnated with a silicone resin.

  The glass cloth layers 12 and 13 are provided on both surfaces of the synthetic resin layer 11 using any means. For example, the glass cloth layers 12 and 13 may be provided on both surfaces of the synthetic resin layer 11 by heat fusion, an adhesive, or the like.

In the present invention, the glass cloth layer is a layer in which a glass cloth is impregnated with a silicone resin. Here, “impregnated with silicone resin” means a state in which a silicone resin film is formed on at least the surface of the glass cloth. For example, the glass cloth layer is a layer in which a silicone resin film having a thickness of 40 μm to 100 μm is formed on the surface of the glass cloth.
When the silicone resin is impregnated, the light transmissivity of the translucent member can be improved, moire fringes can be suppressed, and smoke generation can be suppressed or reduced.

  The layer impregnated with the silicone resin may be a layer in which the silicone resin is dispersed or filled in the glass cloth in addition to a layer in which at least the surface of the glass cloth is coated with the silicone resin. . For example, in a glass cloth, a glass resin may be dispersed or filled in a gap between glass fibers, or a glass fiber strand may be dispersed or filled in a silicone resin.

  The glass cloth layer may have, for example, a porosity of 1% to 100%, for example, 10 to 90%, and in another aspect, 20 to 80%. It may be a layer filled or dispersed with a silicone resin so as to have such a porosity.

The total light transmittance of the translucent member is 40% or more, for example, 50% or more, in another embodiment, 60% or more, and in another example, 70% or more.
The upper limit of the total light transmittance of the translucent member is, for example, 90% or less, 85% or less in another aspect, and 80% or less in another example.
By having the total light transmittance in such a range, high illuminance can be maintained and the power consumption of the light source can be reduced.
Here, in this specification, the total light transmittance is based on “Optical characteristic test of plastic” of JIS K7105, using a light transmittance measuring device “Hazeguard II” (trade name) manufactured by Toyo Seiki Seisakusho. And the value measured.

Moreover, when using an LED light source, the light emitted from the LED light source usually has straightness, and it is preferable to diffuse the light appropriately. The translucent member of the present invention can exhibit an appropriate transmittance and light diffusibility even when an LED light source is used, and can be applied to various uses.
According to the translucent member of the present invention, the glare of the LED light source can be suppressed when the total light transmittance is within a predetermined range. Furthermore, desired illuminance can be maintained and darkening can be suppressed.
Further, by impregnating a glass cloth with a silicone resin, light transmittance is increased. This is presumed that the difference in refractive index of the glass cloth layer can be reduced because the low refractive index air existing inside the glass cloth can be replaced by the high refractive index silicone resin by impregnating the silicone resin.

  The thickness of the translucent member of the present invention is, for example, 200 μm to 1000 μm, and in another aspect, 200 μm to 500 μm. Since the translucent member has a thickness in such a range, it is possible to reduce the weight, and further, the translucent member is excellent in light transmissivity, does not generate moire fringes, and can suppress smoke generation. Can be obtained.

The translucent member of the present invention can have excellent moldability. Since the translucent member of the present invention can be a translucent member laminated without impairing the properties of the glass cloth, such as flexibility, it can be processed into a desired shape.
For example, FIG. 2 is a perspective view showing an example of a state after molding a translucent member, and FIG. 3 is a front view showing an example of a state after molding the translucent member. 2 and 3, the translucent member 20 includes a semi-cylindrical portion 21 and a flange portion 22. The molded translucent member 20 can be suitably used as an illumination cover that requires nonflammability, such as a vehicle illumination cover and a building illumination cover.

  The shape of the translucent member of the present invention is not particularly limited and can be used as a sheet-like translucent member, but the sheet-like translucent member may be further molded according to its use to have various shapes. can do. For example, the shape may be a semi-cylindrical shape, a dome shape, a ball shape, an umbrella shape, a box shape, or the like.

  Furthermore, the translucent member of the present invention can have excellent chemical resistance and detergency by having a glass cloth layer impregnated with a silicone resin. For this reason, even if washing | cleaning of a translucent member is repeated, the outstanding light transmittance can be maintained. Moreover, the translucent member of this invention can also be equipped with the outstanding weather resistance.

The translucent member of the present invention is, for example, one of interpretation standards such as a ministerial ordinance that establishes technical standards relating to railways described in the Ministry of Land, Infrastructure, Transport and Tourism “JNR 124” issued on December 27, 2004. It is possible to meet the non-combustibility standards applied to passenger car and ceiling materials shown in Article 83 of “Parts revision”.
For example, the translucent member of the present invention has no ignition or flame in the alcohol combustion test according to the above criteria, and the generation of smoke is minimal. In particular, the translucent member of the present invention has a low smoke generation property such that smoke cannot be visually observed or no smoke is generated.
Further, after the alcohol combustion test, the carbonization is discoloration of 100 mm or less, and the deformation shows a surface deformation of 100 mm or less. Such characteristics are also referred to as “nonflammable” in the present invention.

  As described above, the translucent member of the present invention has strength, is excellent in light transmissivity, does not generate moire fringes, and can also impart nonflammability. It can be suitably used as a lighting cover that requires nonflammability, such as a cover.

(Synthetic resin layer)
The MI value of the synthetic resin forming the synthetic resin layer is, for example, 8 or more and 65 or less, 8 to 45 or less in another embodiment, and 8 or more and 25 or less in another example. By providing the MI value in such a range, the processability of the resin can be stabilized.
Furthermore, when the refractive index of the synthetic resin layer is n _P and the refractive index of the glass cloth layer is n _G , the value of | n _P −n _G | is set to 0.07 or less, and 0.03 or less. Is more preferable.

  Since the translucent member of this invention is equipped with the said synthetic resin layer and the said glass cloth layer, it has moderate intensity | strength.

In the translucent member of the present invention, the MI value of the synthetic resin forming the synthetic resin layer is, for example, 8 or more and 65 or less, 8 to 45 or less in another embodiment, and 8 or more and 25 or less in another example. The value of | n _P −n _G | which is a difference between the refractive index of the synthetic resin layer and the glass cloth layer is preferably 0.07 or less, more preferably 0.03 or less. Since it is set, the light transmission is excellent and moire fringes are not generated.

  Here, the MI value means a melt index value that is an index representing the fluidity of a synthetic resin measured by a method defined in Japanese Industrial Standard (JIS) K7210.

That is, the MI value of the synthetic resin forming the synthetic resin layer is set to, for example, 8 or more and 65 or less, 8 to 45 or less in another embodiment, and 8 or more and 25 or less in another example. The adhesion between the layer and the glass cloth layer is excellent, and no air layer is formed between the synthetic resin layer and the glass cloth layer. Here, if the refractive index of the air layer is n _A , the following general formula (1) is usually established.
n _P ≈n _G > n _A (1)

  Therefore, if an air layer is present between the synthetic resin layer and the glass cloth layer, the refractive index changes greatly between the synthetic resin layer and the glass cloth layer, the light transmittance is reduced, and moire fringes are formed. Will occur.

On the other hand, in the translucent member of the present invention, the air layer is not generated, and the value of | n _P −n _G | is set to 0.07 or less, more preferably 0.03 or less. The refractive index does not change greatly between the synthetic resin layer and the glass cloth layer, the light transmittance is improved, and moire fringes are not generated.

  In the present invention, the refractive index is measured according to the method of obtaining the refractive index of plastic as defined in JIS K7142.

  As the synthetic resin, an MI value of, for example, 8 or more and 65 or less, in another embodiment, 8 or more and 45 or less, and in another example, a thermoplastic resin or a thermosetting resin is used as long as it is 8 or more and 25 or less. However, a thermoplastic resin capable of easily setting a high MI value is usually preferable.

  The thermoplastic resin is not particularly limited as long as the MI value is within the above range and has high light transmittance. For example, polycarbonate (PC), polypropylene (PP), polyethylene ( PE), polystyrene (PS), polyethylene terephthalate (PET), polyphenylene ether (PPE), polyamide (PA), ABS resin, acrylic resin, and the like can be used. Of these, polycarbonate is particularly preferred. This is because polycarbonate is excellent in light transmittance, and has excellent strength and moldability.

  Although the thickness of the said synthetic resin layer is not specifically limited, In order not to reduce the total light transmittance of the translucent member of this invention, it is preferable to set it as 150 micrometers-250 micrometers.

(Glass cloth layer)
The glass cloth layer according to the present invention is not particularly limited as long as it has translucency. For example, in order not to decrease the total light transmittance of the transparent member of the invention, the basis weight may be preferably used glass cloth ^{100g / m 2 ~300g / m 2} .

  The glass cloth is preferably subjected to a coupling treatment in order to increase the bonding strength with the synthetic resin layer. As said coupling process, the silane coupling process using a silane coupling agent is preferable. As said silane coupling agent, epoxy silanes, aminosilanes, chlorosilanes, vinylsilanes, (meth) acrylsilanes etc. can be used, for example.

  Moreover, it is not specifically limited as glass fiber used for the said glass cloth, For example, glass fiber which consists of E glass, D glass, T glass, C glass, ECR glass, A glass, L glass, S glass, H glass, etc. Can be used.

Usually, the glass cloth layers 12 and 13 as shown in FIG. 1 use the same material, and in this case, the respective refractive indexes are the same. On the other hand, when the glass cloth layers 12 and 13 have different refractive indexes, the difference between the refractive index of the synthetic resin layer 11 and the refractive indices of the glass cloth layers 12 and 13 is 0.07 or less, more preferably 0.03. The following is sufficient.
Moreover, the glass cloth layers 12 and 13 as shown in FIG. 1 may have the same thickness, and the thickness may be changed according to the shape to be molded.

  For example, in the glass cloth layers 12 and 13 as shown in FIG. 1, the surface opposite to the synthetic resin layer 11 may have a smooth surface shape or may have irregularities.

(Silicone resin)
The glass cloth layer according to the present invention is a layer in which a glass cloth is impregnated with a silicone resin. The silicone resin is not particularly limited. However, in the present invention, the silicone resin is a resin that exhibits optical characteristics such as light transmittance within a range in which the translucent member can exhibit a predetermined total light transmittance.

The silicone resin has a refractive index of, for example, 1.35 or more, more preferably 1.42 or more, and further preferably 1.48 or more.
By having a refractive index in such a range, the translucent member of the present invention is excellent in light transmissivity and does not generate moire fringes.

The silicone resin can be impregnated into the glass cloth in any form. For example, a glass cloth layer impregnated with a silicone resin is formed by applying a silicone resin to a glass cloth and curing the silicone resin.
In another embodiment, a glass cloth layer impregnated with a silicone resin can be formed by applying a silicone oligomer to a glass cloth and heating to synthesize a silicone resin from the silicone oligomer.

  By using the glass cloth layer impregnated with the silicone resin, the porosity of the entire translucent member can be lowered, and the translucent member can exhibit more excellent nonflammability. Furthermore, when the synthetic resin of the synthetic resin layer melts during overheating, the outflow can be suppressed by the silicone resin, and the translucent member of the present invention can be made a nonflammable member.

The silicone resin is impregnated into the glass cloth in an amount of 40 to 70 parts by mass, preferably 50 to 60 parts by mass with respect to 100 parts by mass of the glass cloth used for the glass cloth layer.
By impregnating the silicone resin at such a ratio, the porosity of the translucent member can be lowered. Moreover, a translucent member has the more excellent nonflammability, is excellent in light transmittance, and can suppress or reduce a moire fringe.

In one embodiment, a silicone resin synthesized from a silicone oligomer is used as the silicone resin, preferably a silicone resin synthesized from a silicone oligomer that does not contain a solvent or exhibits a low solvent content.
The method for synthesizing the silicone resin is not limited. For example, a silicone resin may be synthesized from the silicone oligomer by applying a silicone oligomer that does not contain a solvent or has a low solvent content to the glass cloth and heating the glass cloth. .
Thus, by forming a silicone resin from a silicone oligomer that does not contain a solvent or exhibits a low solvent content, a translucent member can be produced without chemically eroding glass cloth, synthetic resin layers, and the like. Therefore, the translucent member can exhibit, for example, low smoke generation and can be nonflammable.
In the present invention, “does not contain a solvent” means, for example, that the solvent content with respect to 100 parts by mass of the silicone oligomer is 2% by mass or less, and “shows a low solvent content” means a silicone oligomer. The solvent content relative to 100 parts by mass is 5% by mass or less.

A silicone resin and a silicone oligomer may have a structural unit called D unit and T unit, for example.
As an example, the silicone resin has a T unit / (T unit + D unit) of 50 mol% or less. In another embodiment, the silicone resin has a T unit / (T unit + D unit) of 10 mol% to 50 mol%. Resin is used. By having the T unit and the D unit in such a range, the silicone resin can exhibit high flexibility. Furthermore, the silicone resin can be more effectively impregnated in the glass cloth.
Moreover, the translucent member which has low smoke generation property and shows nonflammability can be obtained.

Silicone resins and silicone oligomers have, for example, at least one of a methyl group, a phenyl group, a methylphenyl group, and derivatives thereof in the structure. More specifically, the methyl group, phenyl group, methylphenyl group and derivatives thereof may be bonded directly or indirectly to the silicon atom in the siloxane bond contained in the silicone resin and the silicone oligomer. When these groups are indirectly bonded to a silicon atom, the silicon atom can be bonded to a methyl group, a phenyl group, a methylphenyl group or a derivative thereof, for example, via a divalent organic group.
The divalent organic group is, for example, a divalent aliphatic hydrocarbon group such as an alkylene group, more specifically an alkylene group having 1 to 10 carbon atoms, —O—, —S—, —SO ₂ —, — NR— (R: hydrocarbon group), —SiR ₁ R ₂ — (R ₁ and R ₂ : hydrocarbon group), —CO—, —NH—, —COO—, —CONH—, or a combination thereof Examples thereof include an alkyleneoxy group, an alkyleneoxycarbonyl group, and an alkylenecarbonyloxy group.

  Examples of silicone resins and silicone oligomers include X40-9225, KR-401, KR-510 (Shin-Etsu Chemical Co., Ltd.), B0446, B1410, B2733, B2230 (Momentive Performance Materials), AY42, 2402, 3074 (Toray Industries, Inc.) Dow Corning Co., Ltd.), IC368 (Asahi Kasei Wacker Silicone Co., Ltd.) and the like.

  The silicone resin may contain silica particles. By including silica particles, the heat resistance of the silicone resin can be improved. The average particle diameter of primary particles of silica particles is preferably 6 nm or more and 100 nm or less.

The silica particles are preferably fumed silica, and the specific surface area of the fumed silica by the BET method is preferably 100 m ² / g or more and 300 m ² / g or less. The fumed silica may be hydrophilic or hydrophobic.

(Method for producing translucent member of the present invention)
The manufacturing method of the translucent member of the present invention is, for example,
Disposing glass cloth on both surfaces of the synthetic resin layer, and applying a silicone resin or a silicone oligomer on the surface of the glass cloth opposite to the synthetic resin layer, heating the silicone resin or the silicone oligomer Forming a glass cloth layer impregnated with a silicone resin.

In one aspect, the method for producing a translucent member has a MI value of, for example, a synthetic resin layer comprising a synthetic resin of 8 to 65, in another aspect, 8 to 45, and in another example, 8 to 25. It includes arranging a glass cloth on both sides to produce a pre-laminated body, thermocompression bonding the pre-laminated body, joining the synthetic resin layer and the glass cloth, and producing a laminated body. When the refractive index of the synthetic resin layer is n _P and the refractive index of the glass cloth is n _G , the value of | n _P −n _G | is, for example, 0.07 or less, more preferably 0.03 or less. Is set to
For example, a glass cloth disposed on one side of the synthetic resin layer is referred to as a first glass cloth, and a glass cloth disposed on the surface of the synthetic resin layer opposite to the first glass cloth is referred to as a second glass cloth. Also good.

  According to the method for producing a translucent member of the present invention, it is possible to produce a translucent member that is excellent in light transmissivity and does not generate moire fringes. Moreover, the translucent member has moderate strength and also has flexibility. In addition, a molded body obtained by molding the translucent member of the present invention may have appropriate rigidity.

  As the synthetic resin layer, a synthetic resin layer made of the synthetic resin described in the above-described translucent member of the present invention can be used. Moreover, the glass cloth demonstrated with the translucent member of the above-mentioned this invention can also be used for the said glass cloth.

  Although the method of the said thermocompression bonding is not specifically limited, For example, the method using a hot roll, the method by a hot press, etc. can be used. Moreover, the temperature at the time of thermocompression bonding should just be the temperature more than the glass transition temperature of the synthetic resin used for the synthetic resin layer, for example, should just be 200 to 300 degreeC. Moreover, the pressure at the time of thermocompression bonding will not be specifically limited if it can pressurize uniformly to the whole surface of the said laminated body. Also, the time for thermocompression bonding is not particularly limited, but may be, for example, 1 minute or more and 10 minutes or less.

Next, a silicone resin or a silicone oligomer is applied to the glass cloth in the thermocompression-bonded laminate, and the glass cloth is impregnated with the silicone resin. As a means for impregnating the glass cloth with the silicone resin, for example, a procedure such as applying a silicone resin solution to the glass cloth or applying a silicone resin melt to the glass cloth can be selected. Examples of means for impregnating the glass cloth with the silicone resin include a method of synthesizing the silicone resin in the glass cloth by applying a silicone oligomer to the glass cloth and heating.
In a preferred embodiment, a silicone oligomer is applied to a glass cloth and heated to synthesize a silicone resin in the glass cloth, thereby producing a glass cloth layer impregnated with the silicone resin.
By passing through such a process, for example, the silicone resin is uniformly filled in the glass cloth, and the porosity of the translucent member can be lowered. In addition, since the silicone oligomer has excellent fluidity without using a solvent or the like, erosion of the synthetic resin layer, glass cloth, and the like caused by the solvent can be suppressed. Accordingly, it is possible to obtain a light-transmitting member that is more effective in light transmission, does not generate moire fringes, and can suppress smoke generation.

  A more detailed example of the method for producing a translucent member of the present invention will be described.

  First, for example, the MI value is 8 or more and 65 or less, in another embodiment, 8 or more and 45 or less, and in another example, the first glass cloth and the second glass cloth are disposed on both surfaces of the synthetic resin sheet. To prepare a preliminary laminate. Next, the said preliminary laminated body is thermocompression-bonded, and the laminated body which has a synthetic resin layer and the glass cloth provided in the both surfaces is produced. Although the method of thermocompression bonding is not particularly limited, for example, thermocompression bonding can be performed by passing the preliminary laminate through a hot roll or the like.

  Subsequently, a silicone oligomer is apply | coated to the glass cloth of the laminated body produced by the above, and it heats, and produces the glass cloth layer which the silicone resin impregnated. The heating temperature after apply | coating an oligomer is 150 to 200 degreeC, for example. The heating time is not particularly limited, and may be, for example, 15 minutes or more and 60 minutes or less. By heating under such conditions, it is possible to obtain a light-transmitting member that is more effective in light transmission, does not generate moire fringes, can suppress smoke generation, and has incombustibility.

  Furthermore, the formed translucent member may be processed as desired to produce a molded body. Through the molding process, translucent members having various shapes can be manufactured. The heating temperature is not particularly limited as long as the translucent member is softened. Moreover, the method of the said shaping | molding process is not limited, either, It can carry out by a hot press process etc.

  Hereinafter, the present invention will be described with reference to examples. However, the present invention is not limited to the following examples.

Example 1
A glass cloth (refractive index: 1.55) having a thickness of 0.175 mm is arranged on both sides of a polycarbonate sheet (MI value: 15, refractive index: 1.58) having a thickness of 0.2 mm to prepare a pre-laminated body. did.

  The preliminary laminate was thermocompression-bonded through a hot roll set at a temperature of 260 ° C. to produce a laminate.

Next, a silicone oligomer manufactured by Asahi Kasei Wacker Silicone Co., Ltd., IC-368 was applied to the glass cloth of the laminate under the conditions of room temperature and an application amount of 0.12 kg / m ² . Then, it heated on 200 degreeC and the conditions for 1 hour.
Thereby, the translucent member of Example 1 was produced.

(Example 2 to Example 9)
As shown in Table 1, a translucent member was produced in the same manner as in Example 1 except that various silicone oligomers or silicone resins were used in each Example and various conditions described in Table 1 were used.

<Measurement of total light transmittance>
Using a light transmittance measuring device “Hazeguard II” (trade name) manufactured by Toyo Seiki Seisakusho, measurement was performed according to JIS K7105 “Optical characteristic test of plastic”.

<Presence of moire stripes>
Both sides of the translucent member were visually observed, and the case where no moire fringes were confirmed was evaluated as good (A), and the case where moire fringes were confirmed was evaluated as poor (B).

<Evaluation of nonflammability>
Shown in Article 83 of "Regional Amendments to Ministerial Ordinances Establishing Technical Standards for Railways" described in the Ministry of Land, Infrastructure, Transport and Tourism Ordinance "JNR 124" issued on December 27, 2004 Combustion tests were conducted in accordance with the non-combustibility standards applied to passenger car and ceiling materials. The obtained results are shown in Table 1. If the conditions for ignition and flame are "None", Smoke is "Low" or more, Alcohol combustion test is "Pass", Corn calorie calorific value test is "Pass", the translucent member is evaluated as non-flammable it can.
In any of the examples, it was revealed that the non-flammability was obtained according to the above criteria. The results are shown in Table 1.

  The translucent members obtained in the examples were excellent in light transmissivity, no moire fringes were generated, smoke generation was scarce, and nonflammability. Moreover, the translucent member obtained by the Example was able to be shape | molded in the shape as shown, for example in FIG. Thus, the translucent member obtained in the Example had excellent moldability.

  INDUSTRIAL APPLICABILITY The present invention can provide a translucent member that is excellent in light transmissivity, does not generate moire fringes, and can also impart non-combustibility. For example, non-combustibility is required for vehicle lighting covers, building lighting covers, and the like. It can be suitably used as a lighting cover.

10, 20 Translucent member 11 Synthetic resin layer (synthetic resin sheet)
12 Glass cloth layer 13 Glass cloth layer 21 Semi-cylindrical part 22 Flange part

Claims (6)

A translucent member having a synthetic resin layer and glass cloth layers provided on both surfaces of the synthetic resin layer,
The glass cloth layer is a layer impregnated with a silicone resin,
The translucent member, wherein the translucent member has a total light transmittance of 40% or more.   The translucent member according to claim 1, which has nonflammability.   The translucent member according to claim 1, wherein the silicone resin has at least one of a methyl group, a phenyl group, a methylphenyl group, and derivatives thereof.   The synthetic resin layer is selected from polycarbonate (PC), polypropylene (PP), polyethylene (PE), polystyrene (PS), polyethylene terephthalate (PET), polyphenylene ether (PPE), polyamide (PA), ABS resin and acrylic resin. The translucent member according to any one of claims 1 to 3, comprising at least one kind of resin.   The translucent member for vehicles containing the translucent member of any one of Claims 1-4. It is a manufacturing method of a translucent member given in any 1 paragraph of Claims 1-4,
Disposing glass cloth on both surfaces of the synthetic resin layer, and applying a silicone resin or a silicone oligomer on the surface of the glass cloth opposite to the synthetic resin layer, heating the silicone resin or the silicone oligomer, A method for producing a translucent member, comprising forming a glass cloth layer impregnated with a silicone resin.