TWI664123B - Heat insulation carton - Google Patents

Abstract

The invention provides a heat-insulating carton, which is formed by folding a heat-insulating base material. The heat-insulating base material includes: a first composite layer unit and a second composite layer unit superposed with the first composite layer unit. The first composite layer unit mainly includes: a foam layer having a first surface and a second surface; a first sealing layer bonded to the first surface of the foam layer; and a second sealing layer by an adhesive The glue layer is bonded to the second surface of the foam layer. The second composite layer unit mainly includes: a third sealing layer and a spacer layer. The third sealing layer is connected to the second sealing layer through the spacer layer. The spacer layer has a plurality of second and third sealing layers. The connected connecting ribs correspond to a plurality of heat-insulating gas chambers arranged at intervals from each other between the second and third sealing layers.

Description

Insulated carton

The present invention relates to a carton; in particular, it refers to an innovative structural type revealer of a thermally insulated carton.

At present, in order to cope with the busy living habits of modern people, when I buy products that require heat preservation and cold preservation outside, in order to facilitate carrying, shopping bags with heat preservation layers have been commonly used. The foam body 12 and the cloth 13 are formed. The foam body 12 has a porous structure and has a heat insulation effect, and the aluminum foil 11 can reduce the radiation heat transmission, thereby achieving the effect of maintaining the temperature inside the shopping bag.

However, it is found that the conventional shopping bag still has the following problems and disadvantages in practical application experience: because the foaming reaction speed of the foam 12 is fast, it is difficult to control the foam uniformity, so that the foam 12 Molding usually has uneven surfaces. When the aluminum foil 11 and the cloth 13 are attached to the inner and outer surfaces of the foam 12, respectively, the surface of the aluminum foil 11 and the cloth 13 will be relatively deformed due to the uneven structure of the foam 12, and there will be waves. The concave-convex surface structure, as shown in Figure 1, seriously affects the appearance quality of the product. In addition, in addition to the mechanical properties of the foam body 12 which are fragile and have limited application scope, the foam body 12 still has the problem of temperature transmission. For example, when placing an article with a temperature lower than the external environment in a conventional shopping bag, , It is unavoidable that the moisture condensation occurs due to the temperature difference between the inside of the conventional shopping bag and the external environment, resulting in extensibility problems such as the wetness of the conventional shopping bag.

In addition, the traditional packaging boxes used to transport low-temperature or high-temperature goods are usually made of Polyurethane. However, in addition to the difficulty of decomposing in nature, and the difficulty of recycling and recycling, the material obviously has a negative impact on the environment With the rising tide of environmental protection in today's world, it is bound to set off a big revolution in environmental protection. In addition, the packaging box made of Polyuron must occupy a certain volume and cannot be folded for storage, which has a problem of occupying a considerable amount of space.

Therefore, in view of the problems existing in the above-mentioned conventional shopping bag technology, how to develop an innovative structure that can have more ideal practicability needs to be considered by the relevant industry for further breakthrough goals and directions; in view of this, the inventor This book has been engaged in the manufacturing development and design of related products for many years. In view of the above-mentioned goals, after detailed design and careful evaluation, this invention finally has a practical invention.

The main purpose of the present invention is to provide a thermally insulated carton, and the technical problem to be solved is to innovate and think about how to develop a new type of thermally insulated carton with more ideal practicality.

The technical features of the present invention to solve the problem are mainly the heat-insulating carton, which is formed by folding a heat-insulating base material. The heat-insulating base material includes a first composite layer unit including a foam layer and a plurality of layers. Interspaced and non-connected pore structure, these pores are used to contain air and have the effect of heat insulation. The foam layer has a first surface and a second surface; a first closed layer is made of airtight aluminum foil. The first sealing layer has a rough surface and a smooth surface. The rough surface of the first sealing layer is bonded to the first surface of the foam layer, and the smooth surface of the first sealing layer faces the spacer. An internal space of a hot carton box; and a second closing layer composed of a sheet of paper material, the inner surface of the second closing layer is bonded to the second surface of the foam layer by an adhesive layer; A second composite layer unit in which a composite layer unit is superimposed includes a third closed layer and a spacer layer, wherein the third closed layer is connected to the second closed layer through the spacer layer, and The third closed layer consists of a The outer surface of the third sealing layer faces an external environment; the spacer layer has a plurality of connecting ribs connected to the second and third sealing layers, and corresponds to the second and third sealing layers. A plurality of spaced and non-connected heat-insulating air chambers are formed between the layers, and each of the heat-shielding air chambers has an effect of containing air for heat insulation.

The main effects and advantages of the present invention are that the first and second composite layer units reduce the heat transfer between the external environment and the inside of the insulated carton, thereby maintaining the temperature inside the insulated carton, and preventing the Water vapor condensation occurs on the surface of the first sealing layer to achieve better thermal insulation.

A secondary effect and advantage of the present invention is that a flattening layer is respectively combined on the inner and outer surfaces of the foam layer, so that the first sealing layer does not have the problem of deformation during the lamination process.

Another effect and advantage of the present invention is that the heat-preserving substrate is composed of a reusable and recyclable material, which is more beneficial to environmental protection.

Another effect and advantage of the present invention is that the heat-insulating carton is folded and formed from a heat-insulating substrate, and can be disassembled after each use to return to a substantially flat configuration.

The additional effects and advantages of the present invention refer to the fact that the outer surface of the third sealing layer has the effect of facilitating printing processing.

Please refer to FIG. 2 and FIG. 3, which are the first embodiment of the insulated carton of the present invention, but these embodiments are for illustrative purposes only, and are not restricted by this structure in patent applications; the insulated carton It is formed by folding a heat-insulating base material A. The heat-insulating base material A includes a first composite layer unit 20 and a second composite layer unit 30 which is superposed with the first composite layer unit 20. In other embodiments, the insulated carton may be, but is not limited to, a container having other geometric configurations such as a cone shape and a cup shape.

The first composite layer unit 20 includes: a foam layer 21, a first sealing layer 22, and a second sealing layer 23, wherein the foam layer 21 has a plurality of spaced apart and disconnected pore structures. The pores are used for containing air and have the effect of heat insulation. The foam layer 21 has a first surface 211 and a second surface 212. The material of the foam layer 21 is selected from a polyurethane foam (Polyurethane, PU). , A group consisting of an ethylene-vinyl acetate foam (Ethylene Vinyl Acetate, EVA), and an ethylene-propylene glycol foam (Ethylene-Propylene-Diene Monomer, EPDM). The first sealing layer 22 is made of a non-breathable aluminum foil material. The first sealing layer 22 has a rough surface 221 and a smooth surface 222. The rough surface 221 of the first sealing layer 22 is bonded to the foam layer 21. The first surface 211 and the smooth surface 222 of the first sealing layer 22 face an inner space of the thermal insulation carton. The second sealing layer 23 is composed of a sheet of paper. The inner surface of the second sealing layer 23 is bonded to the second surface 212 of the foam layer 21 through an adhesive layer 24. The material of the adhesive layer is selected from the group consisting of a melamine formaldehyde, a polyaziridine, a dispersible polyisocyanate, a carbonodiimide, and an epoxy. A group of silane (Epoxy Silane) and a polyurethane (Polyurethane, PU).

The second composite layer unit 30 includes a third closed layer 31 and a spacer layer 32, wherein the third closed layer 31 is connected to the second closed layer 23 through the spacer layer 32, and the third closed layer The layer 32 is composed of a sheet of paper material, and its outer surface faces an external environment; the spacer layer 32 has a plurality of connection ribs 321 connected to the second and third sealing layers 23 and 32, and corresponds to the second A plurality of heat-insulating air chambers 322 spaced apart from each other are formed between the three closed layers 23 and 31, and each of the heat-shielding air chambers 322 is used for accommodating air and has a heat insulation effect. In addition, the plurality of connecting ribs 321 are made of a sheet of wavy paper.

As shown in FIG. 3, in this example, a longitudinal section of the thermal insulation substrate A defines each of the connecting ribs 321 to be connected to each other to form a wavy structure of the spacer layer 32, and the two adjacent connections A bend section 323 is formed at the junction of the ribs 321. These bend sections 323 are connected to one of the second and third sealing layers 23 and 31, and the extension line of the connecting rib 321 is connected to the second and third closure layers. A plane defined by one of the sealing layers 23 and 31 forms an included angle θ, and the included angle θ is an acute angle.

As shown in FIG. 4, it is the second embodiment of the present invention. The main difference from the first embodiment is that the first composite layer unit 20 includes: a foam layer 21, two flat layers 25, and two first sealing layers. 22 and a second sealing layer 23, wherein each of the flattening layers 25 is made of kraft paper with a flat surface, and the two flattening layers 25 are respectively bonded to the first and second layers of the foam layer 21 through the adhesive layer 24. Two surfaces 211, 212. Each of the first sealing layers 22 is made of airtight aluminum foil material. The two first sealing layers 22 have a rough surface 221 and a smooth surface 222. The rough surfaces 221 of the two first sealing layers 22 are respectively bonded to each other. The other side of the two flat layers 25; the second sealing layer 23 is formed of a sheet of paper, and the inner surface of the second sealing layer 23 is bonded to the smooth surface 222 of one of the two first sealing layers 22.

As shown in FIG. 5, it is the third embodiment of the present invention. The main difference between the third embodiment and the first embodiment or the second embodiment lies in the thermal insulation substrate A (illustration omitted in the drawing). A cross section defines that each of the connecting ribs 321 surrounds each other to form a plurality of honeycomb cores 324, and each of the honeycomb cores 324 is connected in parallel to each other to form a grid-like spacer layer 32. The honeycomb core 324 has a A first opening 325 facing the third closing layer 31 and a second opening 326 facing the second closing layer 23. The ends of the first opening 325 of the honeycomb core 324 are connected to the third closing layer 31. On the surface, the edge of the second opening 326 of the honeycomb core 324 is connected to the outer surface of the second sealing layer 23, and the honeycomb core 324, the second and third sealing layers 23, 31 form the heat-insulating air chamber 322.

As shown in FIG. 6, it is the fourth embodiment of the present invention. The main difference from the first embodiment or the second embodiment lies in the thermal insulation substrate A (illustration omitted in the drawing). A longitudinal section defines that each of the connecting ribs 321 surrounds each other to form a plurality of honeycomb cores 324, and each of the honeycomb cores 324 is connected in parallel to each other to form a spacer layer 32 having a grid structure, and each of the honeycomb cores 324 An internal space forms the heat-insulating gas chamber 322, and one of the two parallel connecting ribs 321 is adjacent to the second rib 23 of the second sealing layer 23, and the two ribs 321 are connected in parallel. One of the ribs 321 adjacent to the third sealing layer 31 is connected to the third sealing layer 31.

Advantages of the present invention: The "insulated carton" disclosed in the present invention mainly uses the innovative and unique structural forms and technical features described above, so that the present invention can provide the following effects and comparisons with the conventional structure proposed in [Previous Technology]. Advantages: 1. Reduce the heat transfer between the external environment and the inside of the insulated carton by the first and second composite layer units, so as to maintain the temperature inside the insulated carton and prevent the Water condensation occurs on the surface to achieve better thermal insulation. 2. A flattening layer is respectively bonded on the inner and outer surfaces of the foam layer, so that the first sealing layer will not have the problem of depression and deformation during the bonding process. 3. It is made of reusable and recyclable materials, so it is more environmentally friendly. 4. The heat-insulating carton is folded and formed from the heat-insulating base material, and can be disassembled after each use to return to a substantially flat configuration. 5. The outer surface of the third sealing layer has the effect of facilitating printing processing.

[Knowledge] Insulation layer 10 Aluminum foil 11 Foam 12 Cloth 13 [Invention] Insulation base material A First composite layer unit 20 Foam layer 21 First surface 211 Second surface 212 First sealing layer 22 Rough surface 221 Smooth Surface 222 Second sealing layer 23 Adhesive layer 24 Flattening layer 25 Second composite layer unit 30 Third sealing layer 31 Spacer layer 32 Connecting rib 321 Insulation chamber 322 Bending section 323 Honeycomb core 324 First port 325 Second port 326 Angle θ

Figure 1 is a sectional view of a conventional shopping bag. Fig. 2 is a schematic perspective view of a first embodiment of a thermally insulated carton according to the present invention. FIG. 3 is a partial cross-sectional view taken from FIG. 2. Fig. 4 is a partial cross-sectional view of a second embodiment of a thermally insulated carton according to the present invention. FIG. 5 is a schematic diagram of the assembly relationship between the second closing layer, the third closing layer, and the spacer layer in the third embodiment of the thermal insulation carton of the present invention. FIG. 6 is a schematic diagram of the assembly relationship between the second closing layer, the third closing layer, and the spacer layer in the fourth embodiment of the heat-insulating carton of the present invention.

Claims (2)

A heat-insulating paper box is formed by folding a heat-insulating base material. The heat-insulating base material includes: a first composite layer unit, including: a foam layer, having a plurality of spaced and non-connected pore structures. These pore structures are used to contain air and have the effect of heat insulation. The foam layer has a first surface and a second surface; a first closed layer is made of a gas-impermeable aluminum foil material, and the first closed layer It has a rough surface and a smooth surface. The rough surface of the first closed layer is bonded to the first surface of the foam layer, and the smooth surface of the first closed layer faces an inner space of the thermal insulation carton. And a second sealing layer composed of a sheet of paper material, the inner surface of the second sealing layer is bonded to the second surface of the foam layer by an adhesive layer; and a first composite layer unit The superimposed second composite layer unit includes a third closed layer and a spacer layer, wherein the third closed layer is connected to the second closed layer through the spacer layer, and the third closed layer The closing layer is composed of a sheet of paper. The outer surface faces an external environment; the spacer layer has a plurality of connecting ribs connected to the second and third sealing layers, and corresponds to a plurality of mutually spaced arrangements formed between the second and third sealing layers. And a non-connected heat-insulating air chamber, each of which is used for accommodating air and has a heat-insulating effect; wherein a longitudinal section of the heat-insulating substrate defines each of the connecting ribs surrounding each other to form a plurality of honeycomb cores Each of the honeycomb cores is connected in parallel with each other to construct the spacer layer in a grid structure, and an internal space of each of the honeycomb cores forms the heat insulation air chamber, and one of the two parallel connecting ribs is parallel to each other. A series is adjacent to and parallel to the second closing layer and connected to the second closing layer, and another of the two parallel ribs is adjacent to and parallel to the third closing layer and connects to the third closing layer. A heat-insulating paper box is formed by folding a heat-insulating base material. The heat-insulating base material includes: a first composite layer unit, including: a foam layer, having a plurality of spaced and non-connected pore structures. These pore structures are used to contain air and have the effect of heat insulation. The foam layer has a first surface and a second surface; two flat layers are made of kraft paper with a flat surface, and the two flat layers are respectively made by An adhesive layer is bonded to the first and second surfaces of the foam layer; and two first sealing layers are made of air-impermeable aluminum foil. The two first sealing layers have a rough surface and a smooth surface. Surface, the two rough surfaces of the two first sealing layers are respectively bonded to the other surfaces of the two leveling layers; and a second sealing layer is composed of a sheet of paper, and the inner surface of the second sealing layer is bonded to the two The smooth surface of one of the first closed layers; and a second composite layer unit superimposed on the first composite layer unit, including: a third closed layer and a spacer layer, wherein: the third closed layer Layer The second sealing layer is connected, and the third sealing layer is composed of a sheet of paper, and the outer surface thereof faces an external environment; the spacer layer has a plurality of connecting with the second and third sealing layers. The connecting ribs correspond to a plurality of spaced-apart and non-connected heat-insulating air chambers formed between the second and third closed layers. Each of the heat-shielding air chambers is used for containing air and has a heat insulation effect. A longitudinal section of the thermal insulation substrate defines a plurality of honeycomb cores formed around each of the connecting ribs, and each of the honeycomb cores is connected in parallel to each other to form the spacer layer in a grid structure, and each of the honeycomb cores An internal space forms the insulated air chamber, and one of the two parallel connecting ribs is adjacent to and parallel to the second closing layer and connects to the second closing layer. The two parallel connecting ribs are The other of the series is adjacent to and parallel to the third closing layer and is connected to the third closing layer.