Composite plastic display cover

• US 10,640,419 B2
• Filed: 08/16/2019
• Issued: 05/05/2020
• Est. Priority Date: 07/28/2014
• Status: Active Grant

• Current Assignee: Dell Products LP (Dell Technologies Inc.)
• Original Assignee: Dell Products LP (Dell Technologies Inc.)
• Inventors: Aurongzeb, Deeder M., Peana, Stefan
• Primary Examiner(s): Rummel, Ian A
• Application Number:
  US16/542,866
• Publication Number:
  US 20190367409A1
• Time in Patent Office: 263 Days
• CPC Class Codes: B32B 17/067 of fibres or filaments
• CPC Class Codes: B32B 2255/10 on synthetic resin layer or on natural or synthetic rubber layer
• CPC Class Codes: B32B 2255/20 Inorganic coating
• CPC Class Codes: B32B 2262/105 Ceramic fibres
• CPC Class Codes: B32B 2262/106 Carbon fibres, e.g. graphite fibres
• CPC Class Codes: B32B 2264/102 Oxide or hydroxide
• CPC Class Codes: B32B 2264/107 Ceramic
• CPC Class Codes: B32B 2307/302 Conductive
• CPC Class Codes: B32B 2307/402 Coloured
• CPC Class Codes: B32B 2307/41 Opaque
• CPC Class Codes: B32B 2307/536 Hardness
• CPC Class Codes: B32B 2307/584 Scratch resistance
• CPC Class Codes: B32B 27/08 of synthetic resin
• CPC Class Codes: B32B 27/12 next to a fibrous or filamentary layer
• CPC Class Codes: B32B 27/20 using fillers, pigments, thixotroping agents
• CPC Class Codes: B32B 27/281 comprising polyimides
• CPC Class Codes: B32B 27/304 comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF
• CPC Class Codes: B32B 27/308 comprising acrylic (co)polymers
• CPC Class Codes: B32B 27/365 comprising polycarbonates
• CPC Class Codes: B32B 27/40 comprising polyurethanes
• CPC Class Codes: B32B 3/08 : characterised by added members at particular parts layer formed of separate pieces of material which are juxtaposed side-by-side B32B3/14, B32B3/18
• CPC Class Codes: C03C 17/008 : comprising a mixture of materials covered by two or more of the groups C03C17/02, C03C17/06, C03C17/22 and C03C17/28
• CPC Class Codes: C03C 17/42 : at least one coating of an organic material and at least one non-metal coating
• CPC Class Codes: C23C 18/1212 : Zeolites, glasses
• CPC Class Codes: C23C 18/1216 : Metal oxides C23C18/1212 takes precedence
• CPC Class Codes: C23C 18/1254 : Sol or sol-gel processing
• CPC Class Codes: C23C 18/127 : Preformed particles

Abstract

Methods for manufacturing a composite plastic display cover include defining an edge portion of a base plastic cover sheet. A strengthening treatment is applied to the edge portion of the base plastic cover sheet to improve mechanical strength. A hardening treatment is applied to the base plastic cover sheet and over the strengthening treatment to improve anti-glare and anti-scratch properties.

Claims

1. A method of manufacturing a composite plastic display cover for use in an information handling system, the method comprising:

applying a strengthening treatment to an edge portion of a base plastic cover sheet including applying a polymeric composite coating to the edge portion, the base plastic cover sheet corresponding in size to the composite plastic display cover and having a center portion such that a display covered by the composite plastic display cover is visible through the center portion of the base plastic cover sheet;

after applying the strengthening treatment, applying a hardening treatment to the base plastic cover sheet including applying a nanoceramic solgel;

drying the nanoceramic solgel; and

thermally treating the dried nanoceramic solgel to form a scratch-resistant layer at an external surface of the composite plastic display cover.

2. The method of claim 1, wherein the strengthening treatment includes:

adding a particulate to the polymeric composite coating selected from at least one of;

silica fiber, silica particles, ceramic fiber, and ceramic particles.

3. The method of claim 1, wherein the strengthening treatment includes:

laminating a carbon fiber layer to the edge portion.

4. The method of claim 1, wherein the strengthening treatment includes:

diffusing a colorant into the edge portion.

5. The method of claim 4, wherein the colorant is at least partially opaque, and wherein diffusing the colorant includes laser-infusing the colorant.

6. The method of claim 1, wherein the polymeric composite coating includes at least one of:

polyurethane, polyetherimide, impact-modified poly(methyl methacrylate), polycarbonate, polyvinylpyrrolidine, and glycol-modified polyethylene terephthalate.

7. The method of claim 1, wherein applying the strengthening treatment includes:

applying an anti-microbial coating to the edge portion.

8. The method of claim 1, wherein the nanoceramic solgel includes at least one of:

silica, alumina, and zirconia.

9. The method of claim 1, wherein the strengthening treatment includes:

vapor-depositing silica to the base plastic cover.

10. The method of claim 1, wherein the base plastic cover sheet comprises a composite of plastic and glass layers corresponding in size to the composite plastic display cover.

11. The method of claim 1, wherein applying the hardening treatment results in a lower hardness at the edge portion and a higher hardness at the center portion.

12. The method of claim 1, wherein applying the hardening treatment includes:

prior to applying the nanoceramic solgel, vapor depositing a nanolayer of silica to both the edge portion and the center portion; and

applying the nanoceramic solgel to the center portion over the nanolayer of silica.

13. The method of claim 12, wherein vapor depositing the nanolayer of silica includes:

vapor codepositing a metal with the silica to form a nanolayer of a silica-metal mixture.