# US 9,434,098 B2 · Slot die for film manufacturing

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- Number: US 9,434,098 B2
- Document ID: US9434098B2
- Status: Granted
- Kind: B2
- Application number: 14/571,475
- Filed: 2014-12-16
- Published: 2015-12-03
- Granted: 2016-09-06
- Earliest claimed: 2014-05-29
- Assignees: Samsung Electronics Co., Ltd.
- Applicants: Samsung Electronics Co., Ltd.
- Inventors: Sung Won Choi; Jae Wook Nam; Byung Hee Sohn; Sun Jin Song; Chan Jae Ahn; Semi Lee; Sung Woo Hong
- Web page: https://patentgrep.com/patent/US9434098B2

## CPC

- B29C 48/305: having a wide opening, e.g. for forming sheets
- B29C 48/08: flexible, e.g. films
- B29C 48/92: Measuring, controlling or regulating
- B29C 2948/926: Flow or feed rate
- B29C 2948/92904: Die; Nozzle zone
- B29L 2007/008: {Wide strips, e.g. films, webs}
- B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00)
- B29L: INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES

## 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.

## Claims

### Claim 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.

### Claim 2 (depends on 1)

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.

### Claim 3 (depends on 1)

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.

### Claim 4 (depends on 3)

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

### Claim 5 (depends on 1)

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.

### Claim 6 (depends on 5)

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

### Claim 7 (depends on 1)

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