Protection film and method for manufacturing the same

Patent metadata

Field	Value
Publication number	US-2016236382-A1
Application number	US-201514920799-A
Country	US
Kind code	A1
Filing date	Oct 22, 2015
Priority date	Feb 16, 2015
Publication date	Aug 18, 2016
Grant date	—

Abstract

A method of manufacturing a protection film includes performing a first foaming of a first part of a base material on a substrate to form a bumper layer having first bubbles foamed with a first foaming ratio, and performing a second foaming of a second part of the base material to form a light blocking layer having second bubbles foamed with a second foaming ratio.

First claim

What is claimed is:

1 . A method of manufacturing a protection film comprising:
performing a first foaming of a first part of a base material on a substrate to form a bumper layer having first bubbles foamed with a first foaming ratio; and performing a second foaming of a second part of the base material to form a light blocking layer having second bubbles foamed with a second foaming ratio.

2 . The method of claim 1 ,
wherein the performing of the first foaming comprises heating the first part at a first temperature, and wherein the performing of the second foaming comprises heating the second part at a second temperature different from the first temperature.

3 . The method of claim 2 ,
wherein the first part comprises a top surface of the base material, the second part comprises a bottom surface of the base material, and wherein the performing of the first foaming comprises providing heat corresponding to the first temperature to the first part, and the performing of the second foaming comprises providing heat corresponding to the second temperature to the second part.

4 . The method of claim 2 , further comprises forming an EMBO pattern on a bottom surface of the second part,
wherein the second part is between the first part and the substrate.

5 . The method of claim 4 ,
wherein the performing of the first foaming comprises performing first curing the first part, and wherein the performing of the second foaming comprises performing second curing the second part, wherein the performing of the first curing comprises heating the first part to a third temperature, and wherein the performing of the second curing comprises heating the second part to a fourth temperature different from the third temperature.

6 . The method of claim 5 ,
wherein a top surface of the substrate comprises a mold corresponding to the EMBO pattern, and wherein the forming of the EMBO pattern is performed by casting a bottom surface of the second part by using the mold during the performing of the second curing.

7 . The method of claim 4 ,
wherein the bumper layer has a first density, and wherein the light blocking layer has a second density different from the first density.

8 . The method of claim 7 , wherein the first density is less than the second density.

9 . The method of claim 4 , wherein the first foaming ratio is greater than the second foaming ratio.

10 . The method of claim 9 , wherein an average volume of the first bubbles is greater than that of the second bubbles.

11 . The method of claim 4 , wherein the first temperature is greater than the second temperature.

12 . The method of claim 1 , wherein a transmittance of the light blocking layer is less than that of the bumper layer.

13 . The method of claim 12 , wherein the light blocking layer has transmittance of about 10% or less.

14 . The method of claim 1 , further comprising injecting a foaming gas into the base material,
wherein the performing of the first and second foamings use expansion of the foaming gas.

15 . The method of claim 14 , wherein the foaming gas comprises an inert gas.

16 . A protection film, comprising:
a base having first bubbles formed therein to correspond to a first area, and second bubbles formed therein to correspond to a second area, the first bubbles being foamed with a first foaming ratio, and the second bubbles being foamed with a second foaming ratio less than the first foaming ratio.

17 . The protection film of claim 16 , wherein a first portion of the base corresponding to the first area has a density greater than that of a second portion of the base corresponding to the second area.

18 . The protection film of claim 17 , wherein the second portion of the base corresponding to the second area has a density of about 0.1 g/cm 3 to about 0.5 g/cm 3 , and wherein the first portion of the base corresponding to the first area has a density of about 1 g/cm 3 to about 1.5 g/cm 3 .

19 . The protection film of claims 18 , wherein one surface of the base corresponding to the second area comprises an EMBO pattern fixed to a rear surface of a display panel.

20 . The protection film of claims 19 , wherein the base comprises at least one of polyurethane, polyethylene, and polypropylene.

Assignees

• Samsung Display Co Ltd

Inventors

• Lee Kang-Yong
• Kim Hwanjin

Classifications

• B29K2023/10

  Polymers of propylene · CPC title

• B29K2995/0018

  having particular optical properties, e.g. fluorescent or phosphorescent · CPC title

• B29C44/08 Primary

  using several expanding {or moulding} steps · CPC title

• B29K2023/04

  Polymers of ethylene · CPC title

• C08J2323/06

  Polyethene · CPC title