Bag for storing and preparing food

Abstract

A bag for storing and preparing food, includes a bag body including two sheets having edge regions and being sealed together at least partially along a plurality of the edge regions to present edge seals and a bag opening at one end of the bag. Each sheet comprises a composite material including a plastic inside layer suitable for making contact with the food and an outside layer of paper or metal foil.

Claims

1. A bag for storing and preparing food, comprising: a bag body including two sheets having edge regions and being sealed together at least partially along a plurality of the edge regions to present edge seals and a bag opening at one end of the bag, wherein each sheet comprises a composite material consisting of a plastic inside layer suitable for making contact with the food, an outside layer consisting of paper or a metal foil, and glue sealing the inside layer to the outside layer, wherein the inside layer comprises at least one of PTFE, biaxial-oriented PET, PSU, PMP, PEEK and PA; and wherein the composite material is heat resistant up to at least 200 C.

2. A bag for storing and preparing food, comprising: a bag body including two sheets having edge regions and being sealed together at least partially along a plurality of the edge regions to present edge seals and a bag opening at one end of the bag, wherein each sheet comprises a composite material consisting of a plastic inside layer suitable for making contact with the food, an outside layer consisting of paper or a metal foil, and a hot melt coating or an extruded coating sealing the inside layer to the outside layer, wherein the inside layer comprises at least one of PTFE, biaxial-oriented PET, PSU, PMP, PEEK and PA.

3. The bag according to claim 1, wherein the composite material is heat resistant up to at least 220 C.

4. The bag according to claim 1, wherein the outside layer is an aluminum foil.

5. The bag according to claim 1, wherein the outside layer has a thickness of between 2 m and 20 m.

6. The bag according to claim 1, wherein the outside layer has a thickness of between 5 m to 10 m.

7. The bag according to claim 1, wherein the inside layer has a thickness ranging from 2 m and 15 m.

8. The bag according to claim 1, wherein the inside layer has a thickness ranging from 2 m to 7 m.

9. The bag according to claim 1, wherein the edge seals have a strength greater than 4 N/cm.

10. The bag according to claim 1, wherein the composite material is foldable.

11. The bag according to claim 1, wherein the glue is a polyurethane adhesive between the inside layer and the outside layer.

12. The bag according to claim 1, wherein the composite material further consists of a coating of a non-adhesive material on the inside layer on a side facing toward an inside of the bag.

13. The bag according to claim 12, wherein the non-adhesive material comprises silicone.

14. The bag according to claim 1, wherein the outside layer is paper.

15. The bag according to claim 14, wherein the paper has a mass per square unit area ranging from 10 to 50 g/m.sup.2.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) These and other features and advantages of the invention will be further understood from the following detailed description with reference to the accompanying drawings, showing in:

(2) FIG. 1, a view of a bag according to the invention, provided with a bottom fold;

(3) FIG. 2, a view of a bag according to the invention with a sealing edge; and

(4) FIG. 3, a view of a web composed of several bags according to the invention.

DETAILED DESCRIPTION

(5) FIG. 1 illustrates a bag 1 consisting of a bag body composed of two sheets, positioned one above the other, which are joined along opposite-arranged longitudinal edge regions with the aid of a strip-type sealing layer 5. A bottom fold 4 that joins the two sheets is provided at one end edge. An opening 3 for filling the bag 1 is embodied on the opposite end edge the bottom fold 4.

(6) In place of the bottom fold 4, the bag 1 shown in FIG. 2 is provided with an additional sealing-edge edge 4 in the bottom region, so that the two sheets are connected to each other along the edges on three sides with strip-type sealing edges 4 and 5.

(7) FIG. 3 shows several bags 1 which are connected to each other and respectively consist of a bag body 2, having two sheets which are joined via edge seals 5 along the longitudinal side edges and a sealing edge 4 in the bottom region, wherein the sheets are embodied open at a bag opening 3. Two adjacent bag bodies 2 are connected by a perforation in the region of a longitudinal seal edge 5 and can be separated by tearing along this perforation 6. As a result, the bags 1 can be wound onto a roll and can be torn off by the user.

(8) The sheets of the bags 1, l and 1 respectively consist of a composite material of two layers, wherein the inside layer consists of a plastic film which is permanently joined to an outside layer, for example by gluing them together. The outside layer consists of a metal foil, in particular aluminum foil, with a thickness ranging from 2 m to 20 m and especially from 5 m to 10 m. The outside layer can furthermore also consist of paper in place of the metal foil, wherein the paper may be permanently joined to the plastic film. In addition, the sheet of composite material can also comprise more than two layers.

(9) Any type of adhesive can be used which is suitable for joining the plastic film to the outside layer, so that a stable connection is obtained between the inside layer and the outside layer, given the thermal and mechanical conditions to be expected. Two-component or multi-component systems or hot melt can be used. A polyurethane adhesive can be used in particular which is applied, for example, in amounts ranging from 2 g/m.sup.2 to 5 g/m.sup.2.

(10) The inside layer of plastic material is suitable for the contact with food and is preferably heat-resistant up to a temperature of 220 C. The inside layer in this case can have a thickness ranging from 2 m to 15 m, in particular 3 m to 7 m, and can thus be thinner than the outside layer. The plastic film in particular can consist of PTFE (polytetrafluoroethylene), PET (polyethylene terephthalate), PSU (poly sulfon), PEEK (polyether ether ketone), PMP (polymethyl pentene), PA (polyamide) or any other suitable plastic material or a mixture of the aforementioned materials. In addition, it is possible to coat the inside layer with a non-stick coating, for example with silicone, to avoid the adhering to food items.

(11) Owing to the fact that the inside layer is embodied thin, the composite material can be deformed and folded easily, so that the composite material can snugly enclose the filler material inside the bag 1, 1 and 1. The user can furthermore easily close the bag 1, 1, 1 by folding it, turning it over or crimping the bag opening 3.

(12) The composite material furthermore has sufficient mechanical stability at freezing temperatures of up to 20 C., and the bags 1, 1, 1 containing the food items can be taken from the freezer and placed directly into the oven, so as to heat up the bags 1, 1, 1 therein.

(13) For the embodiments shown herein, the bag 1, 1, 1 is shown to have a smooth bag opening 3 where the two sheets with identical dimensions are designed to be placed precisely one on top of the other. Of course, it is also possible to embody one sheet of the body 2 to be longer than the other one, thereby allowing it to be folded over the other sheet in the manner of a loop.

(14) The composite material bag can furthermore be embodied for the most part to have an optional shape and size and can thus be used for different applications.

(15) It will be understood that the above description of the present invention is susceptible to various modifications, changes and adaptations, and the same are intended to be comprehended within the meaning and range of equivalents of the appended claims.