Method for neutralizing or recycling carrier materials for film-like coatings

Patent metadata

Field	Value
Publication number	US-9488409-B2
Application number	US-201313968456-A
Country	US
Kind code	B2
Filing date	Aug 16, 2013
Priority date	Jan 17, 2002
Publication date	Nov 8, 2016
Grant date	Nov 8, 2016

Abstract

The present invention relates to methods by which to produce sheet-like, wafer-like or film-like forms of drugs, confectionery, other food, cosmetics and the like for oral application or intake. The present invention is more particularly directed to the thermal treatment of carrier materials used in the production of such sheet-like, wafer-like or film-like forms. The thermal treatment removes contaminating or undesired substances from the carrier material.

First claim

That which is claimed:

1. A method for removing contaminating or undesired substances from a carrier material by subjecting such carrier material to a thermal treatment,
wherein said carrier material has been coated with an active ingredient containing coating thus forming an active ingredient containing film, this resulting active ingredient containing film has been peeled off the carrier material and the carrier material has been contaminated by substances stemming from said coating;
wherein said contaminated carrier material comprises contamination by penetration of said substances stemming from said coating into said carrier material;
and said thermal treatment comprises evaporating said substances.

2. A method according to claim 1 , wherein said thermal treatment is performed at a temperature and during a period of time sufficient to remove essentially all of the undesired substances from the carrier material.

3. A method according to claim 1 , wherein said carrier material is paper, a polymer or a composite material composed of paper, polymer or a thin metal foil or polymer and a thin metal foil.

4. A method according to claim 1 , wherein said method comprises forming said active ingredient containing coating from an aqueous coating composition.

5. A method according to claim 1 , wherein said method further comprises providing an active ingredient containing coating comprising drugs, confectionery, food or cosmetics.

6. A method according to claim 1 , wherein said removing consists of a thermal treatment of said carrier material for a period of about 0.5 to 6 minutes.

7. A method according to claim 1 , wherein said contaminated carrier material is passed through a thermal treatment zone whereby said carrier material is heated thereby evaporating said substances, thereafter said substances are fed to a thermal after-burning using controlled air circulation.

8. A method according to claim 1 , wherein said thermal treatment comprises thermal treatment of said carrier material using infra red heat.

Assignees

• Lts Lohmann Therapie Systeme Ag

Inventors

• Neuland Detlev
• Schaefer Wolfgang
• Schwarz Peter

Classifications

• B08B7/0071 Primary

  by heating (B08B7/0035 takes precedence) · CPC title

• B09B3/00

  Destroying solid waste or transforming solid waste into something useful or harmless · CPC title

• F26B3/30 Primary

  from infrared-emitting elements {(by radiation emanating from passages containing heated fluids other than combustion gases F26B23/10)} · CPC title

• B09B3/0075

  Operations & Transport · mapped topic