Sandwich panel and method for manufacturing same

Patent metadata

Field	Value
Publication number	US-2018065335-A1
Application number	US-201615559763-A
Country	US
Kind code	A1
Filing date	Mar 21, 2016
Priority date	Mar 19, 2015
Publication date	Mar 8, 2018
Grant date	—

Abstract

Provided are a sandwich panel and a method for manufacturing same, the sandwich panel comprising: a flocking core layer; and skin layers stacked on either side of the flocking core layer, wherein the flocking core layer comprises a mixed fiber containing at least two types of fibers having different average cross sectional diameters.

First claim

1 . A sandwich panel comprising:
a flocking core layer; and skin layers stacked on both sides of the flocking core layer, wherein the flocking core layer includes a mixed fiber containing at least two types of fibers having different average cross-sectional diameters.

2 . The sandwich panel of claim 1 , wherein the flocking core layer includes the mixed fiber and an adhesive.

3 . The sandwich panel of claim 2 , wherein the flocking core layer has a structure in which the mixed fiber is planted on the adhesive.

4 . The sandwich panel of claim 2 , wherein the adhesive includes one selected from the group consisting of acrylic adhesive, silicone-based adhesive, rubber-based adhesive, and a combination thereof.

5 . The sandwich panel of claim 1 , wherein the mixed fiber includes a first fiber having an average cross-sectional diameter of 40 μm to 70 μm; and a second fiber having an average cross-sectional diameter of 10 μm to 20 μm.

6 . The sandwich panel of claim 5 , wherein the mixed fiber has a volume ratio of the first fiber to the second fiber in the flocking core layer of 4:1 to 9:1.

7 . The sandwich panel of claim 1 , wherein the mixed fiber has an average length of 0.5 mm to 2.0 mm.

8 . The sandwich panel of claim 1 , wherein the mixed fiber includes one selected from the group consisting of carbon fiber, glass fiber, metal fiber, polyamide fiber, polyethylene fiber, polyester fiber, and a combination thereof.

9 . The sandwich panel of claim 1 , wherein the skin layer includes one selected from the group consisting of aluminum, galvanized steel sheet (GI), stainless steel, magnesium, and a combination thereof.

10 . The sandwich panel of claim 1 , wherein the skin layer has a thickness of 0.1 mm to 1.0 mm.

11 . The sandwich panel of claim 1 , wherein the flocking core layer has a thickness of 0.5 mm to 2.0 mm.

12 . The sandwich panel of claim 1 , wherein the sandwich panel is used as a display device lower cover.

13 . A method for manufacturing a sandwich panel comprising:
preparing a mixed fiber containing at least two types of fibers having different average cross-sectional diameters; preparing two skin layers and applying an adhesive to one side of each of the skin layers; planting the mixed fiber on the adhesive of at least one skin layer of the two skin layers in which the adhesive is applied to one side; and stacking the two skin layers so that the respective sides applied with the adhesive face each other to thereby manufacture a flocking core layer.

14 . The method of claim 13 , wherein the mixed fiber is prepared by mixing a first fiber having an average cross-sectional diameter of 40 μm to 70 μm and a second fiber having an average cross-sectional diameter of 10 μm to 20 μm.

15 . The method of claim 14 , wherein the mixed fiber is prepared by mixing the first fiber and the second fiber so that a volume ratio of the first fiber and the second fiber in the flocking core layer is 4:1 to 9:1.

16 . The method of claim 13 , wherein the planting of the mixed fiber is performed by an electrostatic deposition method.

17 . The method of claim 13 , wherein at the time of applying an adhesive to one side of each of the skin layers, the adhesive is applied so that an average thickness of the adhesive is 100 to 300 μm.

18 . The method of claim 13 , further comprising:
curing the adhesive applied to one side of the skin layer.

Assignees

• Lg Hausys Ltd

Inventors

• Lim Ji-Won
• Kim Dong-Eung
• Rho Sang-Hyun

Classifications

• B32B37/24

  with at least one layer not being coherent before laminating, e.g. made up from granular material sprinkled onto a substrate (B32B37/15 takes precedence) · CPC title

• B32B5/10

  characterised by a fibrous {or filamentary} layer reinforced with filaments · CPC title

• B32B2262/14

  Mixture of at least two fibres made of different materials · CPC title

• B32B2457/20

  Displays, e.g. liquid crystal displays, plasma displays · CPC title

• B32B2262/0261

  Polyamide fibres · CPC title