HIGH STRENGTH TRANSPARENT PLASTIC SHEET FOR SUBSTITUTING GLASS SUBSTRATE AND METHOD OF MANUFACTURING THE SAME

• US 20140335337A1
• Filed: 12/06/2012
• Published: 11/13/2014
• Est. Priority Date: 12/16/2011
• Status: Abandoned Application

• Current Assignee: LG Hausys Limited
• Original Assignee: LG Hausys Limited
• Inventors: Lee, Eung Kee, Lee, Min Hee, Shin, Chang Hak, Park, Ku Il
• Application Number:
  US14/361,064
• Publication Number:
  US 20140335337A1
• Time in Patent Office: Days
• US Class Current: 428/214
• CPC Class Codes: B29C 48/08 flexible, e.g. films
• CPC Class Codes: B29C 48/22 with means connecting the layers, e.g. tie layers or undercuts
• CPC Class Codes: B32B 2037/243 Coating
• CPC Class Codes: B32B 2250/40 Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
• CPC Class Codes: B32B 2255/10 on synthetic resin layer or on natural or synthetic rubber layer
• CPC Class Codes: B32B 2255/26 Polymeric coating
• CPC Class Codes: B32B 2307/306 Resistant to heat
• CPC Class Codes: B32B 2307/412 Transparent
• CPC Class Codes: B32B 2307/536 Hardness
• CPC Class Codes: B32B 2307/558 Impact strength, toughness
• CPC Class Codes: B32B 2307/584 Scratch resistance
• CPC Class Codes: B32B 2309/105 Thickness
• CPC Class Codes: B32B 2310/0831 using UV radiation
• CPC Class Codes: B32B 2333/08 Polymers of acrylic acid esters, e.g. PMA, i.e. polymethylacrylate
• CPC Class Codes: B32B 2333/12 Polymers of methacrylic acid esters, e.g. PMMA, i.e. polymethylmethacrylate
• CPC Class Codes: B32B 2457/00 Electrical equipment
• CPC Class Codes: B32B 2457/20 Displays, e.g. liquid crystal displays, plasma displays
• CPC Class Codes: B32B 27/08 of synthetic resin
• CPC Class Codes: B32B 27/306 comprising vinyl acetate or vinyl alcohol (co)polymers
• CPC Class Codes: B32B 27/325 comprising polycycloolefins
• CPC Class Codes: B32B 27/36 : comprising polyesters
• CPC Class Codes: B32B 27/40 : comprising polyurethanes
• CPC Class Codes: B32B 37/02 : characterised by a sequence of laminating steps, e.g. by adding new layers at consecutive laminating stations
• CPC Class Codes: B32B 37/1284 : Application of adhesive
• CPC Class Codes: B32B 37/153 : at least one layer is extruded and immediately laminated while in semi-molten state
• CPC Class Codes: B32B 7/12 : using interposed adhesives or interposed materials with bonding properties
• CPC Class Codes: Y10T 428/24942 : including components having same physical characteristic in differing degree
• CPC Class Codes: Y10T 428/24959 : of adhesive layers
• CPC Class Codes: Y10T 428/24975 : No layer or component greater than 5 mils thick
• CPC Class Codes: Y10T 428/31511 : Of epoxy ether
• CPC Class Codes: Y10T 428/31565 : Next to polyester [polyethylene terephthalate, etc.]
• CPC Class Codes: Y10T 428/31587 : Hydrocarbon polymer [polyethylene, polybutadiene, etc.]
• CPC Class Codes: Y10T 428/31663 : As siloxane, silicone or silane
• CPC Class Codes: Y10T 428/31797 : Next to addition polymer from unsaturated monomers

Abstract

A high strength transparent plastic sheet in accordance with the present invention comprises: a transparent substrate layer; a first and a second adhesive layers respectively formed on both sides of the transparent substrate layer; a first and a second heat-resistant resin layer respectively formed on an outer surface of the first and second coating layer; and a first and a second hard coating layer respectively formed on an outer surface of the first and second resin layer.

Claims

1. A high strength transparent plastic sheet comprising:

a transparent substrate layer;

a first and a second adhesive layers respectively formed on both sides of the transparent substrate layer;

a first and a second heat-resistant resin layers respectively formed on outer surfaces of the first and second coating layers; and

a first and a second hard coating layers respectively formed on outer surfaces of the first and the second resin layers.

2. A high strength transparent plastic sheet according to claim 1, wherein the transparent substrate layer comprises at least one selected from polyethylene terephthalate (PET), polyethylene terephthalate glycol (PETG), cyclo-olefin polymer (COP), cyclo-olefin copolymer (COC), and polyethylene naphthalate (PEN).

3. A high strength transparent plastic sheet according to claim 1, wherein each of the first and the second adhesive layers uses one adhesive selected from polyester, polyurethane, ethylene co-vinyl acetate, and polyvinyl acetate (PVAc).

4. A high strength transparent plastic sheet according to claim 1, wherein each of the first and the second adhesive layers has thickness of 0.5˜

2 μ

m.

5. A high strength transparent plastic sheet according to claim 1, wherein each of the first and the second heat-resistant resin layers has polymethyl methacrylate (PMMA) with weight-average molecular weight of 100,000˜

200,000 as its main component.

6. A high strength transparent plastic sheet according to claim 1, wherein each of the first and the second heat-resistant resin layers is formed with acrylic resin with glass transition temperature of 120˜

130 degrees.

7. A high strength transparent plastic sheet according to claim 1, wherein each of the first and the second hard coating layers comprises at least one selected from ultra violet ray curable resins and oligomers comprising acryl, urethane, epoxy, and siloxane.

8. A high strength transparent plastic sheet according to claim 1, wherein each of the first and the second coating layers has thickness of 2˜

7 μ

m.

9. A method for manufacturing high strength transparent plastic sheet comprising:

(a) attaching first and second adhesive layers and first and second resin layers in order respectively to a transparent substrate layer; and

(b) forming first and second hard coating layers respectively on outer surfaces of the first and the second heat-resistant resin layers.

10. A method for manufacturing high strength transparent plastic sheet according to claim 9, wherein during the step (a), the first and the second adhesive layers are formed on both sides of the transparent substrate layer in advance, and, subseqently, the first and the second heat-resistant resin layers are extrusion coated on both sides thereof, or the first and the second adhesive layers and the first and the second heat-resistant resin layers are coextrusion coated on both sides of the transparent substrate layer.

11. A method for manufacturing high strength transparent plastic sheet according to claim 9, wherein each of the first and the second heat-resistant reinforcing resin layers has polymethyl methacrylate (PMMA) with weight-average molecular weight of 100,000˜

200,000 as its main component.

12. A method for manufacturing high strength transparent plastic sheet according to claim 9, wherein each of the first and second heat-resistant resin layers is formed with acrylic resin with glass transition temperature of 120˜

130 degrees.

13. A method for manufacturing high strength transparent plastic sheet according to claim 9, wherein after (b), further comprises,

(c) laminating first and second protective films on the first and the second hard coating layers.