KR101665347B1 - Plastic sheet - Google Patents

Abstract

A plastic sheet according to an embodiment includes: a first sheet; And a second sheet disposed on one side and the other side of the first sheet; And a third sheet disposed between the first sheet and the second sheet, wherein the first sheet comprises polystyrene, the second sheet comprises PETG (Polyethylene Terephthalate Glycol) The third sheet comprises a styrene-butadiene copolymer.

Description

Plastic sheet {PLASTIC SHEET}

An embodiment relates to a plastic sheet.

In general, plastic sheets are widely used not only for food containers widely used in everyday life but also for construction materials, mechanical parts, electronic parts, lighting covers, sign boards, trays, pallets, automobile parts, .

On the other hand, the conventional plastic sheet is composed of a single layer or a laminate structure of two or more layers. In the case of a single-layer plastic sheet, the properties of the raw material are reflected as it is, There is a problem that can not be done.

Further, although the plastic sheet produced by the laminated structure of two or more layers can solve the disadvantages of the raw materials to some extent by complementary relationship between the layers, the flatness of the sheet is deteriorated due to the difference in physical properties between the layers, , There is a problem that a bank phenomenon occurs on the layer surface.

Particularly, when a receiving portion is formed on a plastic sheet and an electronic component such as a touch panel is received and moved in the receiving portion, an impact is applied to the plastic sheet, Or damage may occur.

Accordingly, a plastic sheet having a new structure capable of solving the above problems is required.

The embodiment attempts to provide a plastic sheet with improved reliability.

A plastic sheet according to an embodiment includes: a first sheet; And a second sheet disposed on one side and the other side of the first sheet; And a third sheet disposed between the first sheet and the second sheet, wherein the first sheet comprises polystyrene, the second sheet comprises PETG (Polyethylene Terephthalate Glycol) The third sheet comprises a styrene-butadiene copolymer.

The plastic sheet according to an embodiment may include a first sheet, a second sheet and a third sheet.

Further, the third sheet is disposed between the first sheet and the second sheet, and is disposed in contact with the first sheet and the second sheet, thereby indirectly bonding the first sheet and the second sheet .

In detail, the first sheet including polystyrene and the second sheet including polyethylene terephthalate glycol may peel off when adhered, so that the adhesive strength may be lowered. Accordingly, by disposing the third sheet including the styrene-butadiene copolymer having good adhesion to the first sheet and the second sheet therebetween, the first sheet and the second sheet Can be easily adhered.

Therefore, the plastic sheet according to the embodiment can easily adhere the first sheet having improved impact resistance and the second sheet having improved wear resistance, so that the plastic sheet can have improved durability and wear resistance at the same time.

Therefore, the plastic sheet according to the embodiment can protect an object such as an electronic part that can be accommodated in the plastic sheet due to the durability of the first sheet. In addition, since the second sheet disposed on the first sheet has improved wear resistance, it is possible to prevent damage to the object accommodated in the plastic sheet due to dust in the first sheet.

Thus, when the plastic sheet is processed to accommodate various objects, it is possible to prevent breakage or damage of the object to be accommodated.

1 is a perspective view of a plastic sheet according to a first embodiment.
2 is a cross-sectional view taken along the line A-A 'in Fig.

In the description of the embodiments, each substrate, frame, sheet, layer or pattern, etc. is formed "on" or "under" or on both sides of each substrate, frame, sheet, The terms " on "and " under " all include being formed either" directly "or" indirectly " In addition, the upper or lower reference of each component is described with reference to the drawings. The size of each component in the drawings may be exaggerated for the sake of explanation and does not mean the size actually applied.

Hereinafter, a plastic sheet 1000 according to an embodiment will be described with reference to Figs. 1 and 2. Fig.

Referring to FIGS. 1 and 2, a plastic sheet 1000 according to an embodiment may include a first sheet 110, a second sheet 120, and a third sheet 130.

The first sheet 110 may be a base sheet. In detail, at least one or more sheets may be laminated on the first sheet 110. The first sheet 110 may include a resin.

For example, the first sheet 110 may comprise polystyrene.

The polystyrene is an amorphous polymer obtained by radical polymerization of styrene, which is a colorless transparent thermoplastic resin, and has a boiling point of about 145 캜. It may also be a polystyrene which is a polymer of a liquid styrene unit produced by the reaction of ethylene and benzene.

The above-mentioned polystyrenes are excellent in impact resistance and mechanical properties, and can be used as packaging containers for electronic parts such as cell phones, tablet PCs and the like because of their easy processability.

The second sheet 120 may be disposed on the first sheet 110. In detail, the second sheet 120 may be disposed on the upper surface and the lower surface of the first sheet 110. For example, the second sheet 120 may be disposed on one side of the first sheet 110 and on both sides of the first sheet 110.

The second sheet 120 may include a resin. For example, the second sheet 120 may include Polyethylene Terephthalate Glycol (PETG).

The polyethylene terephthalate glycol (PETG) may have the following chemical formula.

[Chemical Formula]

The polyethylene terephthalate glycine (PETG) is excellent in abrasion resistance and can be used as a protective layer of packaging containers for electronic parts such as mobile phones and tablet PCs.

The third sheet 130 may be disposed on the first sheet 110. For example, the third sheet 130 may be disposed between the first sheet 110 and the second sheet 120.

For example, the third sheet 130 may be disposed between the first sheet 110 and the second sheet 120 on the top surface of the first sheet 110, and the first sheet 110 (110) and the second sheet (120) on the lower surface of the first sheet (110).

The third sheet 130 may be disposed in contact with the first sheet 110 and the second sheet 120. For example, the third sheet 130 may be disposed in direct contact with the first sheet 110 and the second sheet 120. That is, the lower surface of the third sheet 130 may be disposed in contact with the first sheet 110, and the upper surface of the third sheet 130 may be disposed in contact with the second sheet 120.

The third sheet 130 may include a resin. For example, the third sheet may include a styrene-butadiene copolymer (styrene-butadiene copolymer) in which styrene and butadiene are molecularly bonded. For example, the third sheet may comprise from about 70% to about 75% by weight of the styrene relative to the total copolymer, and from about 25% to about 30% by weight of the butadiene may be included in the entire copolymer have.

The third sheet 130 may be adhered to the first sheet 110 and the second sheet 120. For example, the third sheet 130 may be thermally fused with the first sheet 110 and the second sheet 120.

At this time, the third sheet 130 may serve as a crosslinking agent for bonding the first sheet 110 and the second sheet 120 together.

In detail, the first sheet 110 including the polystyrene and the second sheet 120 including the polyethylene terephthalate glycol (PETG) are peeled off from the adhesive surface during thermal fusion due to the difference in physical properties, It may not be fusion-bonded.

The third sheet 130 including the styrene-butadiene copolymer is a material that fuses well with the first sheet 110 and the second sheet 120. The first sheet 110, One side of the third sheet 130 is bonded to the first sheet 110 and the other side of the third sheet 130 is disposed between the second sheet 120 and the second sheet 120, So that the first sheet 110 and the second sheet 120 can be indirectly bonded.

The first sheet 110 and the second sheet 120 may have different thicknesses.

For example, the third sheet 130 may have a thickness smaller than that of at least one of the first sheet 110 and the second sheet 120. In detail, the third sheet 130 may have a smaller thickness than the first sheet 110 and the second sheet 120.

In addition, the first sheet 110 may have a greater thickness than the second sheet 120.

In detail, the thickness T1 of the first sheet 110 may have a thickness of about 65% to about 70% of the total thickness of the plastic sheet. In addition, the thickness T2 of the second sheet 120 may have a thickness of about 25% to about 30% of the total thickness of the plastic sheet. In addition, the thickness T3 of the third sheet 130 may have a thickness of about 1% to about 5% of the total thickness of the plastic sheet.

The thickness range is a thickness range in which the first sheet 110, the second sheet 120, and the third sheet 130 exhibit all the characteristics thereof. That is, when the thickness range of the first sheet 110, the second sheet 120, and the third sheet 130 is out of the range, the characteristics of the first sheet 110, The characteristics of the second sheet 120, that is, the wear resistance, are not exerted at the same time, and only one of the characteristics is exerted on the center, and the durability and the abrasion resistance can not be improved and the object that can be accommodated in the plastic sheet can not be effectively protected .

In addition, when the third sheet 130 is out of the thickness range, the first sheet 110 and the second sheet 120 may not be fused to each other and peeling may occur. The first sheet 110 or the second sheet 120 may be desorbed and reliability may be degraded.

Accordingly, in the plastic sheet according to the embodiment, the second sheet 120 is disposed on the upper surface or the lower surface of the first sheet 110, so that the plastic sheet can have both impact resistance and elasticity. That is, due to the durability of the first sheet 110, objects such as electronic parts that can be accommodated in the plastic sheet can be protected. Further, since the second sheet 120 disposed on one surface of the first sheet 110 has improved elasticity, it absorbs the shock that can be applied to the plastic sheet, It is possible to alleviate the external impact that may be applied to the object such as the object.

The plastic sheet according to an embodiment may include a first sheet, a second sheet and a third sheet.

Further, the third sheet is disposed between the first sheet and the second sheet, and is disposed in contact with the first sheet and the second sheet, thereby indirectly bonding the first sheet and the second sheet .

In detail, the first sheet including polystyrene and the second sheet including polyethylene terephthalate glycol may peel off when adhered, so that the adhesive strength may be lowered. Accordingly, by disposing the third sheet including the styrene-butadiene copolymer having good adhesion to the first sheet and the second sheet therebetween, the first sheet and the second sheet Can be easily adhered.

Therefore, the plastic sheet according to the embodiment can easily adhere the first sheet having improved impact resistance and the second sheet having improved wear resistance, so that the plastic sheet can have improved durability and wear resistance at the same time.

Therefore, the plastic sheet according to the embodiment can protect an object such as an electronic part that can be accommodated in the plastic sheet due to the durability of the first sheet. In addition, since the second sheet disposed on the first sheet has improved wear resistance, it is possible to prevent damage to the object accommodated in the plastic sheet due to dust in the first sheet.

Thus, when the plastic sheet is processed to accommodate various objects, it is possible to prevent breakage or damage of the object to be accommodated.

The features, structures, effects and the like described in the embodiments are included in at least one embodiment of the present invention and are not necessarily limited to only one embodiment. Furthermore, the features, structures, effects and the like illustrated in the embodiments can be combined and modified by other persons skilled in the art to which the embodiments belong. Therefore, it should be understood that the present invention is not limited to these combinations and modifications.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood that various modifications and applications are possible. For example, each component specifically shown in the embodiments can be modified and implemented. It is to be understood that all changes and modifications that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims (6)

A first sheet; And
A second sheet disposed on one side and the other side of the first sheet; And
And a third sheet disposed between the first sheet and the second sheet,
Wherein the first sheet comprises polystyrene,
Wherein the second sheet comprises PETG (Polyethylene Terephthalate Glycol)
Wherein the third sheet comprises styrene-butadiene copolymer in which styrene and butadiene are molecularly bonded, wherein the styrene is contained in an amount of 70% by weight to 75% by weight with respect to the entire copolymer, Is contained in an amount of 25% by weight to 30% by weight based on the entire copolymer,
Wherein the first sheet and the second sheet are in direct contact with the third sheet and are thermally fused,
Wherein the thickness of the third sheet is smaller than the thickness of the first sheet and the thickness of the second sheet and the thickness of the first sheet is greater than the thickness of the second sheet and the thickness of the third sheet, Wherein the sheet has a thickness of 1 to 5% of the total thickness of the plastic sheet. delete delete delete delete delete

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