WO2014038285A1 - Resin laminated body - Google Patents

Description

Resin laminate

The present invention relates to a resin laminate.

Conventionally, in order to suppress the occurrence of scratches on the display surface or the like of a display device, it has been proposed to arrange a cover member. As an example, for example, Patent Document 1 discloses a cover member that is disposed on at least one surface of a light-transmitting plastic substrate and includes a hard coat layer that includes at least one of an organosilicon compound and a hydrolyzate thereof. Are listed. Patent Document 1 describes that the thickness of the hard coat layer is 2 μm.

JP 2004-202996 A

As mobile communication terminals such as smartphones and mobile phones become more widespread, there is an increasing demand for cover members having even better scratch resistance.

The main object of the present invention is to provide a resin laminate having excellent scratch resistance. In addition, this subject is not only a subject with respect to the cover member of a mobile communication terminal, for example, a cover member for lighting fixtures, such as headlights, fog lamps, stop lamps, direction indicators, etc., and fluorescent lamps of automobiles, automobiles, etc. The same problem arises for vehicle window members such as sunroofs, moon roofs, and vehicle fixed windows.

The first resin laminate according to the present invention includes a resin plate and a hard coat layer. The hard coat layer is disposed on the resin plate. The hard coat layer is made of a silicone resin. The thickness of the hard coat layer is 5 μm or more.

The thickness of the hard coat layer is preferably 100 μm or less.

In the first resin laminate according to the present invention, the pencil hardness defined by JIS K5600-5-4 of the hard coat layer is preferably 4H or more.

The second resin laminate according to the present invention includes a resin plate and a hard coat layer. The hard coat layer is disposed on the resin plate. The hard coat layer is made of a silicone resin. The pencil hardness specified by JIS K5600-5-4 of the hard coat layer is 4H or more.

It is preferable that the resin plate is made of polycarbonate resin or acrylic resin.

The thickness of the resin plate may be larger than 0.2 mm and 6 mm or less, and the layer thickness of the hard coat layer may be 5 μm to 100 μm.

The thickness of the resin plate may be 0.2 mm or less, and the layer thickness of the hard coat layer may be 5 μm to 50 μm.

The first and second resin laminates according to the present invention may each be a cover member for a mobile display device. The first and second resin laminates according to the present invention may each be a cover member for a mobile display device including a non-in-cell type touch panel.

Furthermore, the first and second resin laminates according to the present invention may be cover members for lighting fixtures. Moreover, the window member for vehicles may be sufficient as the 1st and 2nd resin laminated body which concerns on this invention.

According to the present invention, a resin laminate having excellent scratch resistance can be provided.

FIG. 1 is a schematic cross-sectional view of a resin laminate according to an embodiment of the present invention.

Hereinafter, an example of a preferable embodiment in which the present invention is implemented will be described. However, the following embodiment is merely an example. The present invention is not limited to the following embodiments.

In each drawing referred to in the embodiment and the like, members having substantially the same function are referred to by the same reference numerals. The drawings referred to in the embodiments and the like are schematically described. A ratio of dimensions of an object drawn in a drawing may be different from a ratio of dimensions of an actual object. The dimensional ratio of the object may be different between the drawings. The specific dimensional ratio of the object should be determined in consideration of the following description.

FIG. 1 is a schematic cross-sectional view of a resin laminate according to this embodiment. The resin laminate 1 shown in FIG. 1 may be, for example, a protective sheet affixed on a front plate of a display device, a window plate of a vehicle or a building, a front plate of a lighting fixture, or the like. Moreover, the resin laminated body 1 may comprise a display device, a cover member of a lighting fixture, a window plate of a vehicle, or the like. The resin laminate 1 is preferably a cover member for various mobile display devices such as a mobile display device having a non-in-cell touch panel.

The resin laminate 1 includes a resin plate 10. The resin plate 10 constitutes the base material of the resin laminate 1. The constituent material of the resin plate 10 is not particularly limited. The resin plate 10 can be composed of, for example, polycarbonate resin, acrylic resin, polypropylene resin, polyethylene resin, polyvinyl chloride, polyethylene terephthalate resin, or the like. Especially, it is preferable that the resin board 10 consists of a polycarbonate resin or an acrylic resin excellent in heat resistance and excellent in adhesiveness with the hard-coat layer 20 which consists of a silicone resin mentioned later.

The thickness of the resin plate 10 is not particularly limited. When the resin laminate 1 is required to have high rigidity, the thickness of the resin plate 10 is preferably greater than 0.2 mm and 6 mm or less. In addition, when using it as a window member for vehicles, or a cover member of the lighting fixture for motor vehicles, it is especially preferable that the thickness of the resin board 10 is 2 mm or more, and when using as a cover member for the lighting fixture of a fluorescent lamp Particularly preferably, it is 1.5 mm or less. On the other hand, when the resin laminate 1 is required to be flexible, the thickness of the resin plate 10 is preferably 0.2 mm or less.

A hard coat layer 20 is disposed on the resin plate 10. The hard coat layer 20 is a layer for suppressing the occurrence of scratches on the surface. Therefore, the hard coat layer 20 is made of a material having higher hardness than the resin plate 10. Specifically, the hard coat layer 20 is made of a silicone resin. The hard coat layer 20 may be made of only a silicone resin, or may be made of a silicone resin composition obtained by adding a filler to a silicone resin. That is, in the present invention, the hard coat layer 20 includes a layer made of a silicone resin composition.

The hard coat layer 20 can be formed by applying and curing a paste containing a silicone resin monomer or oligomer by a dipping method, a spray method, a die coating method, a spin coating method, or the like.

By the way, the scratch resistance of the surface of the hard coat layer was changed depending on the composition of the hard coat layer, and when the composition of the hard coat layer was the same, it was considered that it did not depend on the layer thickness of the hard coat layer. .

However, as a result of intensive studies, the present inventors have surprisingly found that the scratch resistance of the surface of the hard coat layer 20 is improved by increasing the thickness of the hard coat layer 20 made of silicone resin. It was.

In the resin laminate 1, since the hard coat layer 20 has a thickness of 5 μm or more, the surface of the hard coat layer 20 has high scratch resistance. Specifically, the pencil hardness defined by JIS K5600-5-4 of the hard coat layer 20 can be 4H or higher, and further 6H or higher. From the viewpoint of realizing superior scratch resistance, the thickness of the hard coat layer 20 is preferably 10 μm or more, and more preferably 20 μm or more. However, if the hard coat layer 20 is too thick, the hard coat layer 20 may crack when the hard coat layer 20 is formed or when stress is applied to the resin laminate 1, or the hard coat layer 20 may be peeled off from the resin plate 10. There is a case to do. Therefore, the thickness of the hard coat layer 20 is preferably 100 μm or less, more preferably 80 μm or less, and further preferably 60 μm or less.

In addition, when it is desired to increase the thickness of the hard coat layer 20, a plurality of hard coat layers 20 may be formed by repeating the formation of the hard coat layer a plurality of times.

When the resin plate 10 is thick and has high rigidity so that the thickness of the resin plate 10 is greater than 0.2 mm and 6 mm or less, the layer thickness of the hard coat layer 20 is 5 μm to 100 μm. Is preferred. On the other hand, when the thickness of the resin plate 10 is 0.2 mm or less, the resin plate 10 is thin and flexible, the layer thickness of the hard coat layer 20 is preferably 5 μm to 50 μm.

Hereinafter, the present invention will be described in more detail on the basis of specific examples. However, the present invention is not limited to the following examples, and may be appropriately modified and implemented without departing from the scope of the present invention. Is possible.

(Example)
Tables 1 to 4 show examples of the present invention (sample Nos. 1 to 11 and Nos. 13 to 16) and comparative examples (sample No. 12), respectively.

Samples of Examples and Comparative Examples shown in Tables 1 to 4 were prepared as follows.

First, a resin plate (10 cm × 10 cm) having a thickness shown in Tables 1 to 4 and a silicone resin were prepared. Next, a silicone resin was applied to both surfaces of the resin plate by a dipping method to form a hard coat layer. Thereafter, when the resin plate was made of polycarbonate, each sample was formed by drying at 120 ° C. for 60 minutes, and when the resin plate was made of acrylic, it was dried at 85 ° C. for 5 hours.

Each sample thus produced was evaluated for scratch resistance and crack resistance of the hard coat layer when stress was applied. The evaluation results are shown in Tables 1 to 4.

As is clear from the results shown in Tables 1 to 4, sample No. 1-No. 11 and no. 13-No. In the case of 16, scratches were not recognized in the evaluation of scratch resistance. In addition, in the evaluation of crack resistance of the hard coat layer when stress was applied, cracks could not be visually confirmed, and there was no problem in practical use.

In contrast, Sample No., which is a comparative example, is used. No. 12 was scratched in the evaluation of scratch resistance.

For the evaluation of scratch resistance, based on the pencil hardness defined in JIS K5600-5-4, using a HEIDON surface property tester, the pencil angle is 45 °, the scratching speed is 100 mm / min, and the load is 750 g. The scratch resistance of each sample was evaluated using Mitsubishi pencil HI-uni (4H and 6H). Test each sample 5 times using 4H and 6H pencils and visually check for scratches. ○ For scratches that cannot be confirmed, ○, for scratches that can be confirmed Indicated by ×.

Regarding the evaluation of crack resistance of the hard coat layer when stress was applied, stress was applied in the center direction from both ends of the sample so that the produced sample was curved by 20 mm. For each sample, the presence or absence of cracks was confirmed visually and under a microscope (magnification 10 times). For those where cracks could not be confirmed visually or under a microscope, cracks could not be confirmed visually, but cracks could be confirmed with a microscope. Items are indicated by Δ.

DESCRIPTION OF SYMBOLS 1 ... Resin laminated body 10 ... Resin board 20 ... Hard-coat layer

Claims (11)

A resin plate;
Arranged on the resin plate, comprising a hard coat layer made of silicone resin,
The resin laminated body whose thickness of the said hard-coat layer is 5 micrometers or more. The resin laminate according to claim 1, wherein the hard coat layer has a thickness of 100 μm or less. 3. The resin laminate according to claim 1 or 2, wherein the hard coat layer has a pencil hardness defined by JIS K5600-5-4 of 4H or more. A resin plate;
Arranged on the resin plate, comprising a hard coat layer made of silicone resin,
A resin laminate, wherein the hard coat layer has a pencil hardness defined by JIS K5600-5-4 of 4H or more. The resin laminate according to any one of claims 1 to 4, wherein the resin plate is made of polycarbonate resin or acrylic resin. The thickness of the resin plate is larger than 0.2 mm and 6 mm or less,
6. The resin laminate according to claim 1, wherein the hard coat layer has a thickness of 5 μm to 100 μm. The resin plate has a thickness of 0.2 mm or less,
6. The resin laminate according to claim 1, wherein the hard coat layer has a thickness of 5 μm to 50 μm. The resin laminate according to any one of claims 1 to 7, which is a cover member for a mobile display device. The resin laminate according to claim 8, which is a cover member for a mobile display device including a non-in-cell touch panel. The resin laminate according to any one of claims 1 to 7, which is a cover member for a lighting fixture. The resin laminate according to any one of claims 1 to 6, which is a window member for a vehicle.

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