Claims:Claims:
We claim:
1. An insulating multi-ply packaging material used in connection with the packaging and shipping of goods, comprising:
a first layer of metal sheet material having a substantially flat surface;
a second layer of reinforcement sheet material;
a third layer of bonding sheet material;
a bubble layer having a series of bubbles;
wherein, the second layer and the third layer sandwiches the bubble layer from both sides in same order.

2. An insulating multi-ply packaging material used in connection with the packaging and shipping of goods, as claimed in claim 1, wherein the first metal layer is made up of aluminum foil.

3. An insulating multi-ply packaging material used in connection with the packaging and shipping of goods, as claimed in claim 1, wherein the reinforcement sheet material is polyethylene.

4. An insulating multi-ply packaging material used in connection with the packaging and shipping of goods, as claimed in claim 1, wherein the bubble layer is made up of polypropylene.

5. An insulating multi-ply packaging material used in connection with the packaging and shipping of goods, as claimed in claim 1, wherein the bubbles are polypropylene sheet containing air cells with diameter of ø=4 to 16mm.

6. An insulating multi-ply packaging material used in connection with the packaging and shipping of goods, as claimed in claim 1, wherein the first layer has thickness of 6-20 µm.

7. An insulating multi-ply packaging material used in connection with the packaging and shipping of goods, as claimed in claim 1, wherein the first layer forms outermost layer on both sides of the packaging material.

8. An insulating multi-ply packaging material used in connection with the packaging and shipping of goods, as claimed in claim 1, wherein the bubble layer has a thickness of 2mm to 10mm.

9. An insulating multi-ply packaging material used in connection with the packaging and shipping of goods, as claimed in claim 1, wherein the width of packaging material is 500mm to 3000mm.

10. An insulating multi-ply packaging material used in connection with the packaging and shipping of goods, as claimed in claim 1, wherein the thickness of polyethylene layer is 3mm to 8 mm.

, Description:Field of Invention:

Present invention relates to an inflatable, cushioning, bubble wrap product. More particularly, the present invention relates to an insulated bubble wrap product.

Background of Invention:

A wide variety of products, especially documents, books, and other items, including fragile items, are transported in various types of mailing envelopes generally called “mailers”.One type of a commercial mailer is an envelope with a front and rear wall, sealed at its two lateral and bottom edges, with a flap integrally formed from and extending from the rear wall. The flap extends beyond the upper end of the front wall when the envelope is open. The flap includes on one side a pressure sensitive adhesive that is covered by a release tape. After the envelope is filled with an article to be mailed, the release tape is removed from the flap, and the flap is folded over and adhered to the exterior surface of the front wall, thus sealing the envelope.

US 6761960 discloses an inflatable, conformable, cushioning, packaging product (11) comprises a plurality of individual inflatable strips (21) of multiple bubble cushioning structures. Each individual inflatable strip (21) has a plurality of bubble chambers (23) with each bubble chamber (23) interconnected to an adjacent bubble chamber (23) by an interconnecting passageways (25) which is smaller in size and internal volume than the bubble chambers (23), but which is sufficiently large to enable air volume and pressure in one inflated bubble chamber (23) to be transmitted to adjacent bubble chambers (23) for distributing a shock load on one bubble chamber (23) along the entire length of the individual inflatable strip (21) of interconnected bubble chambers (23). Each individual inflatable strip (21) is defined between two laterally extending spaced apart peripheral seal lines (43) which have an undulating configuration free of corner shapes which could concentrated stresses.

US20040171469
US 20040171469 discloses an envelope includes a front wall having two lateral edges, a top edge, and a bottom edge; and a rear wall having two lateral edges, a top edge, and a bottom edge, the front and rear walls joined along their respective lateral and bottom edges; wherein the front and rear walls each have an outer ply including an outer layer including a propylene polymer or copolymer, polyamide or copolyamide, or polyester or copolyester, and an inner layer including an ethylene homopolymer or copolymer; and an inner ply including an inner and outer surface, including an air cellular or foamed material; the inner surface of the outer ply being adhered to the outer surface of the inner ply. A closure flap or other closure device, and one or more intermediate layers, can optionally be included in the envelope.
Thus, there arises a need to develop a packaging material, which is insulating and bears stress.

Summary of Invention:

In this disclosure, whenever a composition, an element or a group of elements is preceded with the transitional phrase "comprising", it is understood that we also contemplate the same composition, element or group of elements with transitional phrases "consisting essentially of, "consisting", "selected from the group of consisting of, "including", or "is" preceding the recitation of the composition, element or group of elements and vice versa.

According to an aspect of present invention, there is provided an insulating multi-ply packaging material used in connection with the packaging and shipping of goods, comprising:a first layer of metal sheet material having a substantially flat surface;a second layer of reinforcement sheet material;a third layer of bonding sheet material;a bubble layer having a series of bubbles;wherein, the second layer and the third layer sandwiches the bubble layer from both sides in same order.
Yet according to another aspect of the invention, the first metal layer is made up of aluminum foil.
Yet according to another aspect of the invention, the reinforcement sheet material is polyethylene.
Yet according to another aspect of the invention, the bubble layer is made up of polypropylene.

Yet according to another aspect of the invention, the bubbles are polypropylene sheet containing air cells with diameter of ø=4 to 16mm.

Yet according to another aspect of the invention, the first layer has thickness of 6-20 µm.
Yet according to another aspect of the invention, the first layer forms outermost layer on both sides of the packaging material.
Yet according to another aspect of the invention, the bubble layer has a thickness of 2mm to 10mm.

Yet according to another aspect of the invention, the width of packaging material is 500mm to 3000mm.
Yet according to another aspect of the invention, wherein the thickness of polyethylene layer is 3mm to 8 mm.

Brief description of Drawings:

So that the manner in which the above recited features of the present invention can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by reference to embodiments, some of which are illustrated in the appended drawings. It is to be noted, however, that the appended drawings illustrate only typical embodiments of this invention and are therefore not to be considered limiting of its scope, for the invention may admit to other equally effective embodiments.
Fig. 1 shows arrangement of layers of polymers arranged over the other.

Detailed description of Invention:

The present invention provides an insulating multi-ply packaging material which has a layer of metal sheet on one side or on both sides of the material. The central layer of the packaging material is a web of air bubbles.
The aluminium films reflect heat radiation while the air bubbles resist heat conduction and convection as well as act as a sound barrier. The packaging material is sound reduction and heat insulation material with high-strength; good tear resistance, waterproof.
According to an aspect of the invention, the aluminium membrane has been treated with anti-oxidation process and can sustain varied weather conditions.
As shown in Figure 1, the packaging material 100 has a first layer 1 of metal sheet material having a substantially flat surface; a second layer 2 of reinforcement sheet material;a third layer 3 of bonding sheet material;a bubble layer 4 having a series of bubbles;wherein, the second layer 2 and the third layer3 sandwiches the bubble layer from both sides in same order.

The first metal layer is made up of aluminum foil and can be present on either one side or both the sides of the packaging material. A 9 micron aluminium foil used on only one side of the packaging material has aR value is 2.44 and a thermal conductivity of 0.03858.Aluminium foil can also be used on both sides of the packaging material.
The reinforcement sheet material is polyethylene. The bubble layer is made up of polypropylene. The bubbles are polypropylene sheet containing air cells with diameter of ø=4 to 16mm, preferably 10 mm. The bubble layer can have a total thickness of 10 mm.
According to an embodiment of the invention, first layer that is the metal sheet has thickness of 6-20 µm. The first layer forms outermost layer on any of one side or both sides of the packaging material. The bubble layer has a thickness of 2mm to 10mm. The width of packaging material is 500mm to 3000mm. The thickness of polyethylene layer is 3mm to 8 mm.
The final packaging material has a Gsm ranging from 225gsm to 1000gsm and the gsm of polypropylene used is 500Gsm.
The final film prepared by arranging all the layers has an approximate thickness ranging from 30 µm to 50 µm, preferably 44 µm.

According to an embodiment of the invention, the packaging material is made to have a black colour.
According to an embodiment of the invention, the packaging material has a thermal conductivity of 0.03858.

The bubble layer is made by forming roller. The layers are bonded by online process.

While the embodiments of the present invention have been disclosed above, but its use is not limited to the description set forth and described embodiments, which can be applied to various fields suitable for the present invention, for the person skilled in the art, can be easily realized a further modification, thus without departing from the generic concept claims and equivalents as defined by the scope of the present invention is not limited to the specific details shown and described herein with legend.