Core material for vacuum insulator, comprising organic synthetic fiber, and vacuum insulator containing same

Patent metadata

Field	Value
Publication number	US-9734933-B2
Application number	US-201414782597-A
Country	US
Kind code	B2
Filing date	Mar 18, 2014
Priority date	Apr 8, 2013
Publication date	Aug 15, 2017
Grant date	Aug 15, 2017

Abstract

There are provided a core material for vacuum insulator comprising an organic synthetic fiber, and at least one organic synthetic fiber bonded portion; and a preparation method therefor. In addition, provided is a vacuum insulator comprising the core material for vacuum insulator comprising the organic synthetic fiber, and the at least one organic synthetic fiber bonded portion.

First claim

The invention claimed is:

1. A core material for vacuum insulator, comprising:
an organic synthetic fiber, wherein the organic synthetic fiber has a length of 2 millimeters (mm) to 3 mm; and
a plurality of organic synthetic fiber bonded portions,
wherein each organic synthetic fiber bonded portion of the plurality of organic synthetic fiber bonded portions has an average diameter of about 400 micrometers (μm) to about 600 μm, and
wherein a distance between a center of each synthetic fiber bonded portion of the plurality of organic synthetic fiber bonded portions and a center of an adjacent organic synthetic fiber bonded portion of the plurality of organic synthetic fiber bonded portions ranges from about 750 μm to about 1100 μm.

2. The core material for vacuum insulator according to claim 1 , which does not comprise a matrix resin, besides the organic synthetic fiber.

3. The core material for vacuum insulator according to claim 1 , wherein the organic synthetic fiber comprises at least one resin selected from the group consisting of polystyrene, polyester, polypropylene, polyethylene, butadiene, styrene, and combinations thereof.

4. The core material for vacuum insulator according to claim 1 , wherein the organic synthetic fiber has a diameter of about 20 μm or less.

5. The core material for vacuum insulator according to claim 1 , wherein the plurality of organic synthetic fiber bonded portions is formed by welding of the organic synthetic fiber.

6. The core material for vacuum insulator according to claim 1 , wherein the core material for vacuum insulator includes an organic synthetic fiber arranged horizontally.

7. The core material for vacuum insulator according to claim 6 , wherein the organic synthetic fiber arranged horizontally includes a longitudinal or transverse arrangement.

8. The core material for vacuum insulator according to claim 1 , wherein the core material for vacuum insulator has a thickness of about 100 μm to about 200 μm.

9. The core material for vacuum insulator according to claim 1 , wherein the core material for vacuum insulator is a single or a plurality of laminated structure.

10. The core material for vacuum insulator according to claim 9 , wherein the laminated core material for vacuum insulator has a weight per unit area of about 40 g/m 2 or less.

11. The core material for vacuum insulator according to claim 9 , wherein the laminated core material for vacuum insulator has a porosity of about 60% to about 80%.

12. A vacuum insulator comprising the core material for vacuum insulator defined in claim 1 .

13. The core material for vacuum insulator according to claim 1 , wherein each organic synthetic fiber bonded portion of the plurality of organic synthetic fiber bonded portions has an average diameter of about 538 μm to about 600 μm, and wherein a distance between a center of each synthetic fiber bonded portion of the plurality of organic synthetic fiber bonded portions and a center of an adjacent organic synthetic fiber bonded portion of the plurality of organic synthetic fiber bonded portions ranges from about 750 μm to about 1034 μm.

14. A process for preparing a core material for vacuum insulator, comprising:
providing an organic synthetic fiber, wherein the organic synthetic fiber has a length of 2 millimeters (mm) to 3 mm;
spinning the organic synthetic fiber in paper form; and
locally heat pressing the spinned organic synthetic fiber to form a plurality of organic synthetic fiber bonded portions,
wherein each organic synthetic fiber bonded portion of the plurality of organic synthetic fiber bonded portions has an average diameter of about 400 micrometer (μm) to about 600 μm, and
wherein a distance between a center of each synthetic fiber bonded portion of the plurality of organic synthetic fiber bonded portions and a center of an adjacent organic synthetic fiber bonded portion of the plurality of organic synthetic fiber bonded portions ranges from about 750 μm to about 1100 μm.

Assignees

• Lg Hausys Ltd

Inventors

• Kim Eun Joo
• Jung Seong Moon
• Lee Myung
• Lee Ju Hyung
• Kim Hyun Jae

Classifications

• D04H1/54

  by welding together the fibres, e.g. by partially melting or dissolving (in combination with needling D04H1/485) · CPC title

• H01B3/421

  Polyesters · CPC title

• D10B2321/022

  polypropylene · CPC title

• D10B2401/04

  Heat-responsive characteristics · CPC title

• H01B3/441 Primary

  from alkenes · CPC title