Slot die for film manufacturing

Patent metadata

Field	Value
Publication number	US-9434098-B2
Application number	US-201414571475-A
Country	US
Kind code	B2
Filing date	Dec 16, 2014
Priority date	May 29, 2014
Publication date	Sep 6, 2016
Grant date	Sep 6, 2016

Abstract

A slot die includes a material distribution chamber configured to distribute a casting solution supplied to the material distribution chamber, and a lip in which a slot including an expansion portion is defined and through which the casting solution distributed in the material distribution chamber is discharged, where a width of the expansion portion taken in a first direction is expanded from one side of the expansion portion to a lip end facing the one side and the one side of the expansion portion is apart from the lip end by a predetermined length taken along a second direction which is perpendicular to the first direction and substantially parallel to a flow direction of the casting solution.

First claim

What is claimed is:

1. A slot die comprising:
a material distribution chamber configured to distribute a casting solution supplied to the material distribution chamber; and
a lip in which a slot including an expansion portion is defined and through which the casting solution distributed in the material distribution chamber is discharged, wherein a width of the expansion portion taken along a first direction is expanded from one side of the expansion portion to a lip end facing the one side, and the one side of the expansion portion is apart from the lip end by a predetermined length taken along a second direction which is perpendicular to the first direction and substantially parallel to a flow direction of the casting solution, wherein the expansion portion of the lip includes width-directional wall surfaces, where the width-directional wall surfaces define the slot, and at least one of the width-directional wall surfaces is inclined with a predetermined inclination angle with respect to the second direction, and the predetermined inclination angle is greater than about 0 degree and equal to or smaller than about 10 degrees.

2. The slot die of claim 1 , wherein the width of the expansion portion is gradually decreased corresponding to the predetermined length from the lip end to the one side of the expansion portion.

3. The slot die of claim 1 , wherein both of the width-directional wall surfaces of the expansion portion of the lip defining the slot are inclined with a predetermined inclination angle with respect to the second direction.

4. The slot die of claim 3 , wherein the predetermined length is about 1 millimeter to about 3 millimeters.

5. The slot die of claim 1 , wherein only one of the width-directional wall surfaces of the lip defining the slot is inclined with a predetermined inclination angle with respect to the second direction at the expansion portion.

6. The slot die of claim 5 , wherein the predetermined length is about 1 millimeter to about 3 millimeters.

7. The slot die of claim 1 , further comprising a device controller configured to control an amount of the casting solution discharged through the lip.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Choi Sung Won
• Nam Jae Wook
• Sohn Byung Hee
• Song Sun Jin
• Ahn Chan Jae
• Lee Semi
• Hong Sung Woo

Classifications

• B29L2007/008

  Wide strips, e.g. films, webs · CPC title

• B29C2948/92904

  Die; Nozzle zone · CPC title

• B29C48/92

  Measuring, controlling or regulating · CPC title

• B29C2948/926

  Flow or feed rate · CPC title

• B29C47/14 Primary

  Operations & Transport · mapped topic