JP2001239637A - Outdoor transparent plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an outdoor transparent plate having a difficulty to burn, excellent impact resistance and heat resistance at a low cost and having excellent clouding preventiveness with a difficulty to fine crack on a surface. SOLUTION: The outdoor transparent plate is constituted by integrally laminating surface layers 3, 3 each made of a polyester resin composition containing a polyarylate resin of 9 wt.% or more on both surfaces of a core layer 2 containing a polyester resin.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transparent, light-colored or dark-colored transparent plate for outdoor use which is used, for example, as a roof panel for carports and terraces.

[0002]

2. Description of the Related Art Conventionally, acrylic resin is often used as an outdoor transparent plate such as a carport or a roof plate of a terrace. In recent years, those made of polycarbonate resin have been partially adopted.

[0003]

However, the former one made of acrylic resin has a problem that it is easily burnt and easily broken. Further, when the latter polycarbonate resin is used, the disadvantage that the acrylic resin is easily burned and easily broken when the acrylic resin is used can be solved, but there is a problem that the resin price is expensive and the cost is increased.

On the other hand, to solve the above-mentioned problems of the acrylic resin and the polycarbonate resin, it is considered that a polyester resin is used.
The polyester resin has a fatal defect that it is inferior in heat resistance, such as being easily deformed when exposed to sunlight outdoors. This is particularly noticeable in light-colored or dark-colored prints. Furthermore, the polyester resin, even if it is constructed in a well-ventilated place, tends to cause microcracks on the surface due to hydrolysis, and the surface tends to fog over time. There are also problems. As described above, it is difficult to use a polyester resin as a substitute for the acrylic resin or the polycarbonate resin because the heat resistance is inferior and fogging easily occurs with time.

[0005] As described above, a material which is inexpensive and has sufficient flame retardancy, impact resistance, heat resistance and anti-fogging properties as an outdoor transparent plate has not been found yet. Is the current situation.

The present invention has been made in view of such technical background, and is inexpensive, hard to burn, excellent in impact resistance, excellent in heat resistance, capable of preventing thermal deformation, and capable of preventing surface deformation. An object of the present invention is to provide an outdoor transparent plate in which fine cracks are unlikely to occur and excellent in preventing fogging.

[0007]

Means for Solving the Problems In order to achieve the above object, the present inventors have made intensive studies and found that a polyester resin composition containing a specific amount of a polyarylate resin on both surfaces of a core layer containing a polyester resin. It has been found that the desired outdoor transparent plate can be obtained by laminating and integrating a surface layer made of a product, and the present invention has been completed.

That is, in the outdoor transparent plate of the present invention, a surface layer made of a polyester resin composition containing 9% by weight or more of a polyarylate resin is laminated and integrated on both surfaces of a core layer containing a polyester resin. It is characterized by becoming.

The polyester resin and the polyarylate resin, which are constituent resins, are both hardly flammable resins, and therefore have sufficient flame retardancy. In addition, since the surface layer contains 9% by weight or more of polyarylate resin, the surface layer has excellent impact resistance. Since both surfaces of the core layer are covered with such a surface layer, the entire transparent plate is formed. As a result, good impact resistance is secured. Further, since the polyester resin which is a constituent resin of the core layer is inexpensive, the cost can be reduced. Furthermore, the surface layer is made of a polyester resin composition containing 9% by weight or more of a polyarylate resin, and the heat resistance of the surface layer itself is improved because the polyarylate resin itself has a high heat deformation temperature. You. In addition, the polyarylate resin undergoes a fleece transfer reaction when exposed to sunlight, and a benzophenone structure exhibiting an ultraviolet absorbing effect is formed on the surface.
The generation of fine cracks on the surface due to the hydrolysis is effectively prevented, and the fogging of the surface over time is also prevented.

The polyester resin constituting the core layer and the surface layer is preferably polyethylene terephthalate or copolymerized polyethylene terephthalate resin. The polyarylate resin is a saturated polyester resin, and has excellent compatibility with polyethylene terephthalate or copolymerized polyethylene terephthalate resin, so that excellent transparency is ensured. Because it is composed of the composition, it can be recycled and can contribute to environmental protection. Further, since the compatibility between the resins in the surface layer is very good, there is an advantage that the impact resistance of the surface layer is further improved.

The polyester resin constituting the core layer is preferably a copolymerized polyethylene terephthalate resin in which 10 to 70% of the ethylene glycol component in polyethylene terephthalate is substituted with cyclohexanedimethanol. Since this resin is a resin which is hardly crystallized, it has an excellent heat fusion property, and therefore has an advantage that the bonding strength with the surface layers laminated on both surfaces of the core layer can be further improved.

The content of the polyarylate resin in the polyester resin composition constituting the surface layer is 30 to 70% by weight, so that more excellent workability can be ensured while securing more excellent heat resistance as a transparent plate. It is preferable in that it can be secured.

The thickness of each surface layer is 10 to 500.
The range of μm is preferable because more excellent heat resistance can be secured.

[0014]

1 and 2 show an embodiment of an outdoor transparent plate according to the present invention. The outdoor transparent plate (1) of the present invention has a surface layer (3) made of a polyester resin composition containing 9% by weight or more of a polyarylate resin on both sides of a core layer (2) containing a polyester resin.
(3) is an integrated laminate.

The polyester resin constituting the core layer (2) is not particularly limited. However, it is preferable to use polyethylene terephthalate or copolymerized polyethylene terephthalate resin in that more excellent transparency can be ensured. Also, if such a resin is used,
Recycling can also be made possible, so that it is possible to sufficiently respond to environmental protection requirements.

Among them, particularly preferred as the polyester resin constituting the core layer (2) is 10 to 70% of the ethylene glycol component in polyethylene terephthalate.
% Of the copolymerized polyethylene terephthalate resin (hereinafter referred to as “PETG resin”)
It is). Since this PETG resin is a resin that is difficult to crystallize and has excellent heat-fusibility, the bonding strength with the surface layers (3) and (3) laminated on both surfaces of the core layer (2) is further improved. Can be done.

The core layer (2) may contain various additives such as an ultraviolet absorber, a lubricant, a fluorescent agent, a coloring agent, and an inorganic filler as required. Further, a resin other than the polyester resin can be blended in the core layer (2) as long as the effects of the present invention are not impaired.

The polyester resin composition constituting the surface layer (3) must contain at least 9% by weight of a polyarylate resin. Since this polyarylate resin has a high heat deformation temperature, the heat resistance as the surface layer (3) can be remarkably improved, and the surface layers (3) and (3) excellent in such heat resistance can be obtained. ) Is laminated and integrated on both sides of the core layer (2), so that elongation and shrinkage at the surface where stress is most likely to concentrate can be prevented,
The heat resistance of the transparent plate (1) as a whole can be improved. If the content of the polyarylate resin is less than 9% by weight, sufficient heat resistance as the transparent plate (1) cannot be secured. Furthermore, when the polyarylate resin is exposed to sunlight, it undergoes a Fries transfer reaction to form a benzophenone structure exhibiting an ultraviolet absorbing effect. Therefore, it is possible to prevent a decrease in the physical properties of the surface layer (3) and to hydrolyze the polyarylate resin. Thereby, it is possible to effectively prevent the occurrence of fine cracks in the surface layer (3), and to prevent the surface from fogging over time. Since the surface layers (3) and (3) having the above configuration are laminated and integrated on both surfaces of the core layer (2), that is, since the surface of the core layer (2) is protected, the core layer (2) is protected. ) The surface is not hydrolyzed and fine cracks do not occur in the core layer (2). Therefore, it is possible to effectively prevent the occurrence of fine cracks due to hydrolysis as a whole of the outdoor transparent plate (1), thereby preventing the occurrence of fogging.

Further, when the surface layer (3) contains 9% by weight or more of the polyarylate resin, the surface layer (3) has excellent impact resistance, and the surface layer (3) ( Since 3) is laminated on both sides of the core layer (2), good impact resistance can be secured as a whole of the transparent plate (1).

The content of the polyarylate resin in the polyester resin composition constituting the surface layer (3) is 3
The content is preferably 0 to 70% by weight. If it is less than 30% by weight, heat resistance is lowered, so that it is not preferable.

The polyester resin constituting the surface layer (2) is not particularly limited, but it is preferable to use polyethylene terephthalate or copolymerized polyethylene terephthalate resin. This is because the polyarylate resin is a saturated polyester resin and has very good compatibility with polyethylene terephthalate or copolymerized polyethylene terephthalate resin, so that more excellent transparency can be secured. Furthermore, by being composed of such a resin composition having excellent compatibility, recycling can be realized, and it can sufficiently contribute to environmental protection, which is a recent social demand.

The polyester resin composition constituting the surface layer (3) may contain various additives such as an ultraviolet absorber, a lubricant, a fluorescent agent, a coloring agent, and an inorganic filler, if necessary. . Further, as long as the effects of the present invention are not impaired, a resin other than the polyester resin can be blended with the composition constituting the surface layer (3).

The thickness of each of the surface layers (3) and (3) is preferably in the range of 10 to 500 μm. 10
If it is less than μm, the effect of improving heat resistance cannot be sufficiently obtained, so that it is not preferable. On the other hand, if the thickness exceeds 500 μm, the cost is increased due to an increase in the use amount of the polyarylate resin, and the thermal processing (bending) cannot be easily performed. Among them, each surface layer (3)
The thickness of (3) is more preferably in the range of 50 to 500 μm.

The thickness of the core layer (2) is not particularly limited, but is usually 0.6 to 4.9 mm, and the thickness of the transparent plate (1) is usually 1.0 to 5.0 mm. is there.

In the present invention, the method of laminating the core layer (2) and the surface layers (3) and (3) is not particularly limited, and the laminating method is, for example, a laminating method such as multilayer extrusion using a feed block. It may be integrated.

The shape of the outdoor transparent plate (1) of the present invention is not particularly limited.
Various shapes such as a bent shape, an arch shape (see FIG. 1), and a box shape can be adopted.

The use of the outdoor transparent plate (1) of the present invention is as follows.
Although it is not particularly limited as long as it is for outdoor use, the present outdoor transparent plate can secure excellent heat resistance even when subjected to light color printing and dark color printing. It is particularly suitable as a signboard to be applied, a roofboard for carports, and a roofboard for terraces.

[0028]

Next, specific embodiments of the present invention will be described.

Example 1 PETG14471 (manufactured by Eastman Chemical Company; a copolymerized polyethylene terephthalate resin obtained by substituting 10 to 70% of the ethylene glycol component in polyethylene terephthalate with cyclohexanedimethanol, a colorless and transparent product) having a diameter of 50 mm was vented. While extruding with an extruder, a polyarylate resin (trade name: U-100, manufactured by Unitika Ltd., heat distortion temperature 18)
5 ° C.) A polyester resin composition consisting of 10 parts by weight and 90 parts by weight of polyethylene terephthalate was previously prepared by adding 150 parts by weight.
Pre-dried at 5 ° C. for 5 hours or more, extruded with a non-vented extruder having a diameter of 32 mm,
PETG14471 by layer feed block
A surface layer made of the polyester resin composition was laminated and integrated on both sides of a core layer made of, and a transparent plate having a thickness of 3 mm was obtained by a 400 mm wide T-die installed further downstream. The thickness of each surface layer was 30 μm. This transparent plate was formed into two types of shapes, an arch type and a box type, to obtain an outdoor transparent plate.

<Example 2> PETG as a resin for the core layer
14471 (manufactured by Eastman Chemical Company; 10% of ethylene glycol component in polyethylene terephthalate)
Polyarylate resin (trade name: U-100, manufactured by Unitika Ltd.) 4 as a resin for the surface layer using a copolymerized polyethylene terephthalate resin in which ~ 70% is substituted with cyclohexanedimethanol, a transparent type of dark brown color)
Except for using a polyester resin composition comprising 0 parts by weight and 60 parts by weight of polyethylene terephthalate, two types of arch type and box type transparent transparent plates were obtained in the same manner as in Example 1. The thickness of the transparent plate was 3 mm, and the thickness of each surface layer was 100 μm.

Example 3 A polyester resin composition comprising 40 parts by weight of a polyarylate resin (trade name: U-100, manufactured by Unitika Ltd.) and 60 parts by weight of polyethylene terephthalate was used as the resin for the surface layer. A transparent plate having a thickness of 3 mm was obtained in the same manner as in Example 1, and the lower surface of the transparent plate was subjected to black solid printing, and then molded into two types of arch type and box type for outdoor use. A transparent plate was obtained. The thickness of each surface layer was 100 μm.

Comparative Example 1 A polyester resin composition comprising 8 parts by weight of a polyarylate resin (trade name: U-100, manufactured by Unitika Ltd.) and 92 parts by weight of polyethylene terephthalate was used as the resin for the surface layer. Is
In the same manner as in Example 1, two types of architectural and box-shaped transparent plates for outdoor use were obtained. The thickness of the transparent plate was 3 mm, and the thickness of each surface layer was 30 μm.

Comparative Example 2 A polyester resin composition comprising 40 parts by weight of a polyarylate resin (trade name: U-100, manufactured by Unitika Ltd.) and 60 parts by weight of polyethylene terephthalate was used as the resin for the surface layer, and 2
Two types of arch-type and box-type outdoor transparent plates were obtained in the same manner as in Example 1 except that the surface layer was laminated and integrated only on one side of the core layer using the seed two-layer feed block. The thickness of the transparent plate is 3 mm, and the thickness of one surface layer is 10 mm.
It was 0 μm.

The two types of outdoor transparent plates produced as described above were exposed to sunlight outdoors for 50 days from July to August, and the degree of deformation of the outdoor transparent plate (index of heat resistance) was measured. And the fogging prevention property was evaluated based on the following criteria. (Criteria for judging the degree of deformation) “○”: No deformation at all “△”: Some deformation occurred “X”: Remarkable deformation occurred (Criterion for preventing fogging) “O”: No fogging "△": Slightly cloudy "X": Slightly cloudy

[0035]

[Table 1]

As is clear from the table, the outdoor transparent plates of Examples 1 to 3 of the present invention were excellent in heat resistance and also excellent in prevention of fogging without generation of fine cracks. In addition, it was confirmed that excellent heat resistance can be ensured even in the case of performing dark color printing (Example 3).

On the other hand, Comparative Examples 1 and 2, which deviate from the scope of the present invention, were inferior in heat resistance and caused deformation, and Comparative Example 1 was also inferior in fogging prevention.

[0038]

The outdoor transparent plate of the present invention has a surface layer made of a polyester resin composition containing 9% by weight or more of a polyarylate resin laminated and integrated on both sides of a core layer containing a polyester resin. Polyester resin and polyarylate resin, which are constituent resins, are both flame-retardant resins, so they are excellent in flame retardancy, and the polyester resin, which is a constituent resin of the core layer, is inexpensive and therefore low cost. . Further, since the surface layer contains the polyarylate resin in an amount of 9% by weight or more, the surface layer becomes excellent in impact resistance, and therefore, good impact resistance can be secured as a whole of the transparent plate. Further, since the surface layer contains 9% by weight or more of the polyarylate resin, the heat resistance of the surface layer itself can be improved, and such a surface layer having excellent heat resistance is laminated on both sides of the core layer. As a result, excellent heat resistance can be exhibited as a whole of the transparent plate.
Furthermore, when the polyarylate resin is exposed to sunlight, it undergoes a fleece transfer reaction to form a benzophenone structure exhibiting an ultraviolet absorbing effect, so that it is possible to prevent a decrease in physical properties in the surface layer and to cause fine cracks on the surface due to hydrolysis. Can be prevented, and generation of fogging over time can be effectively prevented.

When the polyester resin constituting the core layer and the surface layer is a polyethylene terephthalate or copolymerized polyethylene terephthalate resin, a polyethylene terephthalate-based resin which can ensure more excellent transparency and has excellent compatibility between the resins. Because it is composed of the composition, it can be recycled, and can sufficiently respond to the demand for environmental protection.

The polyester resin constituting the core layer is made of PE
When the TG resin is used, the bonding strength between the core layer and the surface layer can be further improved, and the durability can be further improved.

In the case where the content of the polyarylate resin in the polyester resin composition constituting the surface layer is 30 to 70% by weight, it is possible to ensure sufficient processability while maintaining good processability.
More excellent heat resistance can be secured.

Each of the surface layers has a thickness of 10 to 500 μm.
When it is in the range of m, more excellent heat resistance can be secured.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an outdoor transparent plate according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing the same layer configuration.

[Explanation of symbols]

 1: Outdoor transparent plate 2: Core layer 3: Surface layer

 ──────────────────────────────────────────────────の Continuing on the front page F term (reference) 2E108 BN01 CC09 GG06 GG10 GG17 HH03 HH04 4F100 AK41A AK41B AK41C AK42A AK42B AK42C AK42J AK43B AK43C AL01A AL05B AL05C BA03 BA10B BA10C BA16E01 J02 GB01 J02

Claims (5)

[Claims] 1. An outdoor use wherein a surface layer made of a polyester resin composition containing 9% by weight or more of a polyarylate resin is integrally laminated on both surfaces of a core layer containing a polyester resin. Transparent plate. 2. The outdoor transparent plate according to claim 1, wherein the polyester resin constituting the core layer and the surface layer is polyethylene terephthalate or copolymerized polyethylene terephthalate resin. 3. The outdoor transparent plate according to claim 2, wherein the polyester resin constituting the core layer is a copolymerized polyethylene terephthalate resin obtained by substituting 10 to 70% of an ethylene glycol component in polyethylene terephthalate with cyclohexanedimethanol. . 4. The polyester resin composition constituting the surface layer has a polyarylate resin content of 30 to 30.
The outdoor transparent plate according to any one of claims 1 to 3, which is 70% by weight. 5. The thickness of each surface layer is 10 to 10
The outdoor transparent plate according to any one of claims 1 to 4, which has a range of 500 µm.