Claims
- 1. A multilayer and multifunctional packaging element of thermoformed material, endowed with high barrier properties toward gases and high absorbing properties of liquid aqueous substances, the packaging element comprising the following layers:
- (a) an intermediate absorbing layer,
- (b) an outer sheet having high barrier properties towards gases, and
- (c) an inner porous layer,
- wherein,
- (i) each layer comprises a polymeric thermoplastic material,
- (ii) the intermediate absorbing layer is coupled without adhesives to, and is in contact with, the outer sheet and to the inner porous layer, and
- (iii) the materials of the intermediate absorbing layer, the inner porous layer, and the outer sheet are chemically compatible.
- 2. A packaging element according to claim 1, wherein the intermediate absorbing layer is a polymeric thermoplastic material selected from the group consisting of acrylic resins, methacrylic resins, polypropylene, expanded polypropylene, fibrous polypropylene and expanded fibrous polypropylene.
- 3. A packaging element according to claim 1, wherein the outer sheet comprises multiple layers.
- 4. A packaging element according to claim 1, wherein the outer sheet has an average thickness from 0.2 to 5 mm.
- 5. A packaging element according to claim 1, having the shape of a tray or a box for the packing of meat, vegetables, fruit or cheese.
- 6. A packaging element according to claim 1, wherein said intermediate absorbing layer contains an antibacterial agent.
Priority Claims (1)
Number |
Date |
Country |
Kind |
MI91A1795 |
Jun 1991 |
ITX |
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CROSS-REFERENCE TO RELATED APPLICATION
This application is a continuation-in-part of our application Ser. No. 07/904,833, filed Jun. 26, 1992, now abandoned.
US Referenced Citations (3)
Non-Patent Literature Citations (1)
Entry |
AB (WPAT) 92-201124/95, Halstrick et al, German 4039354. |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
904833 |
Jun 1992 |
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