# US 9,750,686 B2 · Laminated film and method for laminating films

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 9,750,686 B2
- Document ID: US9750686B2
- Status: Granted
- Kind: B2
- Application number: 14/649,430
- Filed: 2013-07-22
- Published: 2015-10-29
- Granted: 2017-09-05
- Earliest claimed: 2012-12-04
- Assignees: Lotte Fine Chemical Co., Ltd.
- Applicants: Samsung Fine Chemicals Co., Ltd.
- Inventors: Sung Hwan Bang; Kyung Yeol Park; Jin Ryul Son; Jyung Hee Jeon; Ju Hee Shin; Sang Youb Lee
- Web page: https://patentgrep.com/patent/US9750686B2

## CPC

- A61K 9/0053: {Mouth and digestive tract, i.e. intraoral and peroral administration}
- A61K 9/0065: {Forms with gastric retention, e.g. floating on gastric juice, adhering to gastric mucosa, expanding to prevent passage through the pylorus}
- A61K 9/009: {Sachets, pouches characterised by the material or function of the envelope (with gastric retention A61K9/0065; sachets which are not administered but function merely as a container are classified according to the content, e.g. sachets comprising powder for reconstitution of a drink A61K9/0095)}
- A61K 9/70: Web, sheet or filament bases {; Films; Fibres of the matrix type containing drug (hollow drug-filled fibres A61K9/0092)}
- A61K 47/38: Cellulose; Derivatives thereof
- A61P 43/00: Drugs for specific purposes, not provided for in groups A61P1/00-A61P41/00
- B32B 23/20: comprising esters
- B32B 23/22: comprising ethers
- B32B 27/08: of synthetic resin
- B32B 27/18: characterised by the use of special additives
- B32B 37/00: Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B 37/0038: {involving application of liquid to the layers prior to lamination, e.g. wet laminating (B32B37/12 takes precedence)}
- B32B 37/10: characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
- B32B 37/1284: {Application of adhesive}
- B32B 37/18: involving the assembly of discrete sheets or panels only
- B32B 2037/1276: {water-based adhesive}
- B32B 2307/716: Degradable
- B32B 2317/18: Cellulose, modified cellulose or cellulose derivatives, e.g. viscose (B32B2317/10, B32B2317/12, B32B2317/16 take precedence)
- B32B 2535/00: Medical equipment, e.g. bandage, prostheses or catheter
- A61K: PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES (devices or methods specially adapted for bringing pharmaceutical products into particular physical or administering forms A61J3/00; chemical aspects of, or use of materials for deodorisation of air, for disinfection or sterilisation, or for bandages, dressings, absorbent pads or surgical articles A61L; soap compositions C11D)
- A61P: SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM

## Abstract

The inventive concept relates to a laminated film and a method of laminating films, and the disclosed laminated film includes at least two films sequentially stacked and bonded to each other, wherein each of the films may be each independently a gastric film or an enteric film.

## Claims

### Claim 1

A laminated film comprising:
at least a gastric film and an enteric film, wherein the gastric film is disposed on and bonded to a surface of the enteric film,
wherein the gastric film comprises at least one selected from a water soluble entrapped material and a first poorly water soluble entrapped material,
wherein the enteric film comprises a second poorly water soluble entrapped material,
wherein the enteric film allows an aqueous medium to permeate therethrough, and
wherein the first poorly water soluble entrapped material and the second poorly water soluble entrapped material are the same or different,
wherein the laminated film is prepared by bonding a gastric film and an enteric film to each other by using an acidic solution as a medium, wherein the gastric film and the enteric film obtain surface adhesiveness when the films contact water,
wherein the bonding comprises
spraying the acidic solution on a first surface of one of the gastric film and the enteric film,
disposing the other of the gastric film and the enteric film on the first surface, and
compressing the gastric film and the enteric film to each other.

### Claim 2 (depends on 1)

The laminated film of claim 1, wherein the number of the films is an odd number, and the gastric film and the enteric film are alternately laminated.

### Claim 3 (depends on 2)

The laminated film of claim 2, wherein one side outermost film and the other side outermost film of the films are both gastric films.

### Claim 4 (depends on 2)

The laminated film of claim 2, wherein one side outermost film and the other side outermost film of the films are both enteric films.

### Claim 5 (depends on 1)

The laminated film of claim 1, wherein the first and second poorly water soluble entrapped materials each independently comprise at least one selected from an active pharmaceutical ingredient (API) and a functional food ingredient.