TWM495350U - Self-venting composite film for heating food package - Google Patents

Description

Food heating automatic pressure regulating packaging and composite film thereof

This creation relates to a food heating automatic pressure regulating package, especially a composite film of the package, which can automatically adjust the pressure in the package.

According to the general microwave food, the packaging method, in addition to the use of the packaging box and the upper cover to package the food, in order to meet the sealing and the preservation conditions, usually a thin film is used for external packaging, when the microwave is required, the film must be removed. The action, or the cutting edge is used on the outer film to cut the movement, so as to avoid the danger of food explosion due to the microwave heating pressure. However, taking microwave food in supermarkets and shopping malls as an example, when the service personnel help the microwave, whether it is to remove the film or to open the package by knife cutting, it is a troublesome thing, and after microwave heating, it is still necessary. Use tape for sealing and simple packaging to avoid food leakage. It can be seen that the existing microwave packaging boxes and packaging bags are cumbersome and inconvenient to use, and although the use of tape for simple packaging has not been able to achieve good sanitary conditions such as preservation, there are many kinds of packages on the market that do not require removal of the packaging film. Microwave heating packaging, this kind of packaging film can automatically relieve pressure when the pressure is generated by microwave heating to prevent the problem of explosion.

However, these existing products have the following problems:

1. Although the pressure generated after heating can be released, after the pressure is released, the sealing effect is not good, and foreign objects such as dust are easily entered, which may cause pollution and health problems.

2. Some films for sealing are troublesome in the process and on the package body.

3, some products are said to have automatic pressure relief when heated to produce pressure, but often the effect is not good.

4. Although these packaging films can be used in automatic pressure regulating packaging, the external pressure of the vacuum packaging is greater than the internal pressure, which makes the automatic pressure regulating packaging unable to be vacuumed, so it is generally not suitable for vacuum packaging.

5. After the film of some products is heated, the printing ink will melt and fall into the package, polluting the food.

In view of this, the present invention provides a food heating automatic pressure regulating package and a composite film thereof, which can solve the aforementioned prior art problems.

In one embodiment, a food heating automatic pressure regulating package comprises a box body and a composite film, the box body having a bottom portion and a peripheral edge extending from the bottom side to the side, the circumference surrounding the content chamber, the top of the circumference The inner side is an open mouth, and the composite film is heat-sealed and fixed on the periphery of the casing, and the open mouth is closed. The composite film comprises a first film layer, a second film layer and an adhesive layer, and the predetermined width of the first film layer The inner layer is coated with a partial release layer, and the second film layer is provided with a cutting line corresponding to the position of the partial release layer, and the adhesive layer is interposed between the first film layer and the second film layer, and is first The film layer and the second film layer are glued together, and at the position of the partial release layer, the first film layer and the second film layer form a pseudo adhesive, and the second film layer of the composite film is adjacently adhered to the box body. The circumference of the second film layer is at the location of the heat seal and extends to the content chamber. When the first release layer and the adhesive layer are adhered to the first film layer and the second film layer, and the composite film encloses the case body, the foreign object can be prevented from entering the content chamber, and the package is heated and the content chamber is generated. When the pressure is applied, the first film layer and the second film layer of the partial release layer portion may be opened to generate a gap, so that the pressure can be leaked out. If there is no partial release layer and the adhesive layer, the composite film is hot pressed. When the casing is combined, the first film layer, the second film layer and the casing are sequentially bonded and fixed, and the internal pressure will not allow the first film layer and the second film layer to have a gap, and therefore, the pressure cannot be discharged.

In one embodiment, a food heating automatic pressure regulating package, wherein the periphery of the casing has a top ring edge, and the composite film is heat sealed to the top ring edge.

In one embodiment, a food heating automatic pressure regulating package comprises a closed film bag composed of two films, the film bag having a content chamber and at least one heat seal, wherein at least one film system uses a composite film, the composite The film comprises a first film layer, a second film layer and an adhesive layer, wherein the first film layer is coated with a partial release layer in a predetermined width, and the second film layer corresponds to the position of the partial release layer. There is a cutting line, the adhesive layer is interposed between the first film layer and the second film layer, and the first film layer and the second film layer are glued together, and the first film layer is located at a position of the partial release layer And forming a false adhesion to the second film layer, wherein the second film layer of the composite film is adjacent to the other mold, the cutting line of the second film layer is at the position of the heat seal and extends to the content chamber, if not In the partial release layer and the adhesive layer, when the composite film is hot pressed and bonded to another film, the first film layer, the second film layer and the other film are sequentially bonded and fixed, and the internal pressure will not allow the first film layer and the first layer. The second film layer creates a void, so the pressure cannot be discharged.

In one embodiment, there is a game between the partial release layer and the adhesive layer. a portion of the hot melt adhesive layer having a width greater than or equal to a width of the partial release layer and covering the partial release layer to separate the partial release layer from the adhesive layer. By means of the device, when the package is evacuated to generate pressure in the content chamber, the local release layer acts on the adhesive layer and the second film layer by the local hot melt adhesive layer, and the air outside the package will not enter. The content room, and when the package is heated to generate pressure, the local hot melt adhesive layer is heated to lose the viscosity and function, and the internal pressure spreads the first film layer and the second film layer of the partial release layer portion to create a gap, so that The pressure is leaked, so it is suitable for use as a vacuum packaging for food heating and automatic pressure regulation.

In one embodiment, the above food heating automatic pressure regulating package, wherein the partial release layer has a width greater than a width of the cutting line, and the partial release layer has a width smaller than a width of the adhesive layer.

In one embodiment, the above food heating automatic pressure regulating package, wherein the first film layer is nylon, acrylic, polyester, polyethylene, PE, polypropylene ( Polypropylene, PP), polyamide, ethylene-styrene copolymer (ES), cycio olefin, polyethylene terephthalate, PET), ethylene vinyl alcohol (EVOH), ethylene vinyl acetate (EVA), ionic polymer compound, polyethylene naphthalate (PEN) Polyether ether ketone (PEEK), polysulfone, styrene acrylonitriles (SAN), polyimide (PI), polyvinyl alcohol (polyvinyl alcohol, PVA), polyacrylonitrile (PAN), polyurethane (PU), nylon (nylon), polycarbonate (polycarbonate, PC), wax paper, polymer multilayer coextruded stretch film, synthetic paper, glass paper, polymer coated paper, paper, aluminum foil material, aluminum foil laminated film, An electroplated PET film, a BOPP film, a CPP film, or a multilayer film composed of a composite of two or more layers.

In one embodiment, the above food heating automatic pressure regulating package, wherein the second film layer is a single layer film made of PP, ABS, CPP, LLDPE, CMPS material or a composite of two or more single layer films. Multilayer film.

The present invention further provides a structure of a composite film as in each of the foregoing packages. The effects and advantages of this case are as follows:

1. Each layer in this creation is simple in structure and suitable for adhesive and laminating, which is convenient for consistent production. It can be used with existing ultrasonic hot pressing machinery or electrothermal hot pressing machine when packaging with hot pressing. It is very convenient.

2. The sealing of the creation is good, the pressure generated by the heating can be smoothly discharged, and the pressure can be restored to the original closed state after the pressure is released.

3. The composite film of the present invention uses an adhesive layer to adhere the inner side of the first film layer to the second film layer, and the ink of the printed text or pattern on the inner side of the first film layer can be sealed. Therefore, although the ink is melted after the package is heated, it does not Therefore, it oozes out and contaminates the food in the package.

4. In addition to being applied to heating automatic pressure regulating packaging, this creation can also be applied to vacuum packaging with automatic pressure regulation, which has more applicability.

100‧‧‧Food heating automatic pressure regulating packaging composite film

10‧‧‧First film

20‧‧‧Second film

30‧‧‧Local release layer

40‧‧‧Adhesive layer

21‧‧‧ cut line

D1, d2, d3‧‧‧ width

50‧‧‧Local hot melt adhesive layer

200‧‧‧Food heating automatic pressure regulating packaging

60‧‧‧ box

61‧‧‧ bottom

62‧‧‧ Periphery

67‧‧‧Food

63‧‧‧Content Room

64‧‧‧Open mouth

65‧‧‧Top ring

66‧‧‧Heat seal

F‧‧‧ Pressure

31‧‧‧ gap

300‧‧‧Food heating automatic pressure regulating packaging

70‧‧‧ film

71‧‧‧Closed film bag

72‧‧‧Content Room

74‧‧‧Hot seal

Fig. 1 is a partially exploded perspective view of a composite film according to an embodiment of the present invention.

Figure 2 is a cross-sectional view of Figure 1.

Fig. 3 is a perspective view showing the composite film of the first drawing of the present invention.

Figure 4 is a cross-sectional exploded view of a composite film of another embodiment of the present invention.

Figure 5 is a perspective view of the composite film of Figures 1 to 3 used in a package.

Fig. 6a is a hatching of Fig. 5, 6a-6a, showing an unheated state.

Figure 6b is another state of Figure 6a showing the state after heating.

Figure 7a is a cross-sectional view of Figure 6a-7a-7a.

Figure 7b is a cross-sectional view of Figure 6b, Figure 7b-7b.

Figure 8 is a perspective view of the composite film of Figure 4 used in a package.

Figure 9a is a hatched view of 9a-9a in Figure 8 (unheated).

Figure 9b is another state diagram of Figure 9a (showing that it has been heated).

Figure 10a is a hatching of 10a-10a in Figure 9a.

Figure 10b is a hatching of 10b-10b in Figure 9b.

In order to enable the review committee to have a better understanding of the features and characteristics of the present invention, the following preferred embodiments are illustrated with the following description: Please refer to Figures 1~3 for an embodiment of the present invention. The composite film 100 of the food heating automatic pressure regulating package comprises a first film layer 10, a second film layer 20, a partial release layer 30 and an adhesive layer 40.

In an embodiment of the present invention, the predetermined width of the first film layer 10 The partial release layer 30 is internally coated, and the partial release layer 30 is a commonly used release agent, and the first film layer 10 is selected from the group consisting of nylon, acrylic, and polyester. Polyethylene (PE), polypropylene (PP), polyamide, ethylene-styrene copolymer (ES), cycio olefin, Polyethylene terephthalate (PET), ethylene vinyl alcohol (EVOH), ethylene vinyl acetate (EVA), ionic polymer compound, polyethylene Alcohol to polyethylene naphthatate (PEN), polyether ether ketone (PEEK), polysulfone, styrene acrylonitriles (SAN), polyarylene (polyimide, PI), polyvinyl alcohol (PVA), polyacrylonitrile (PAN), polyurethane (PU), nylon (nylon), polycarbonate (PC), wax paper, polymer Multi-layer co-extruded stretch film, synthetic paper, cellophane (glassine paper), paper coated with polymer material, film made of paper or aluminum foil, aluminum foil laminated film, electroplated PET film, BOPP film, CPP film or multilayer film composed of two or more layers of film In addition, the inner surface of the first film layer 10 can be used for printing, and the printed matter, such as characters, figures or symbols, can be seen from the outer surface, and can be used as an indication, description, trademark or beautification.

In an embodiment, a cutting line 21 is provided at a position corresponding to the partial release layer 30 of the second film layer 20, and the cutting line 21 refers to cutting the longitudinal direction of the second film layer 20, and All of the cuts may be cut or partially cut, and in the drawing are all illustrations of the cut; and the second film 20 is the same as the package itself. A material suitable for welding or a material such as a single layer film made of PP, ABS, CPP, LLDPE or CMPS or a composite film of two or more single layer films.

In an embodiment, the adhesive layer 40 is interposed between the first film layer 10 and the second film layer 20 to bond the first film layer 10 and the second film layer 20 together. The adhesive layer 40 The entire film is coated on the first film layer 10 having the partial release layer 30. Therefore, at the position of the partial release layer 30, the first film layer 10 and the second film layer 20 form a false adhesion; In addition to bonding the first film layer 10 and the second film layer 20, the adhesive layer 40 can prevent the ink printed on the inner side of the first film layer 10 from being melted by heat and falling into the package, contaminating the food.

In one embodiment, the width d2 of the partial release layer 30 is greater than the width of the cutting line 21, and the width d2 of the partial release layer 30 is smaller than the width d1 of the adhesive layer 40.

As described above, please refer to FIG. 4, in another embodiment, a partial hot melt adhesive layer 50 is disposed between the partial release layer 30 and the adhesive layer 40, and the width of the local hot melt adhesive layer 50. The d3 is greater than or equal to the width d2 of the partial release layer 30. The width d3 of the local hot-melt adhesive layer 50 in this embodiment is greater than the width d2 of the partial release layer 30, and the left and right sides thereof are adhered to the first film layer. 10, regardless of how, the partial release layer 30 is mainly spaced apart from the partial release layer 30 and the adhesive layer 40, so that the partial release layer 30 has no effect at normal temperature, and dissolves the local hot melt adhesive layer at a high temperature. After 50, the partial release layer 30 has an effect, and can be applied to food heating automatic pressure regulating vacuum packaging.

Please refer to pictures 5~7b for the first to third pictures of this creation. The composite film 100 is used in an embodiment of the food heating automatic pressure regulating package 200, which comprises a casing 60 and the aforementioned composite film 100.

In one embodiment, the casing 60 has a bottom 61 and a peripheral edge 62 extending from the bottom 61 to one side, surrounded by a peripheral edge 62 into a content chamber 63 for containing food 67, and an inner side of the top of the peripheral edge 62 is an open mouth. 64. The outer peripheral edge has a top ring edge 65. The composite film 100 is heat-sealed and fixed on the top of the peripheral edge 62, for example, on the top ring edge 65, and the second film layer 20 of the composite film 100 is adjacently adhered to The top edge 65 of the peripheral edge 62 of the casing 60 and the cutting line 21 of the second film layer 20 are positioned at the heat seal 66 and extend into the contents chamber 63.

Referring to Figures 6b and 7b, when the food heating automatic pressure regulating package 200 is heated or microwave heated, the content chamber 63 generates a pressure F which enters the second film from the cutting line 21 of the second film layer 20. Between the layer 20 and the first film layer 10, the pseudo-adhesive position is opened to form a gap 31, and the pressure F is released from the gap 31, and after being released, returning to the closed state of the 6a, 7a, To prevent foreign matter from entering, if there is no partial release layer 30 and adhesive layer 40, when the composite film 100 is thermocompression bonded to another film, the first film layer 10, the second film layer 20 and the other film are sequentially bonded and fixed. The internal pressure will not allow the first film layer 10 and the second film layer 20 to have a gap, and therefore, the pressure cannot be discharged.

In addition, the composite film 100 of FIG. 4 can also be used in the food heating automatic pressure regulating package 200 of the present embodiment. Although a layer of the local hot melt adhesive layer 50 is added, there is no difference in the use efficiency, and the use thereof can be used. Another implementation below The description of the examples will not be repeated here.

Referring to Figures 8 to 10b, the composite film 100 of the fourth drawing of the present invention is used in an embodiment of the food heating automatic pressure regulating package 300, which comprises a closed film bag 71 composed of two films 70, which The film bag 71 has a content chamber 72 and at least one heat seal 74, and at least one of the films 70 uses the composite film 100. In the present embodiment, the composite film 100 is only used as a film 70, and the other film 70 is used. The same composite film 100 or other bonding film may be used, the composition of which is not described herein, and the second film layer 20 of the composite film 100 is adjacent to another film 70, and the second film layer A cut line 21 of 20 is positioned at the heat seal 74 and extends into the contents chamber 72.

Referring to Figures 9b and 10b, when the food heating automatic pressure regulating package 300 is heated by microwaves, heat and pressure F are generated in the content chamber 72, and the heat temperature causes the local hot melt adhesive layer 50 to soften, and the pressure F is from the first The cutting line 21 of the second film layer 20 enters between the second film layer 20 and the first film layer 10, and the pseudo-adhesive position is opened to form a gap 31, and the pressure F is released from the gap 31, and is released. It also returns to the closed state of Figures 9a and 10a to prevent foreign matter from entering.

When the food heating automatic pressure regulating package 300 of the present embodiment is vacuumed, the partial release layer 30 is suspended due to the action of the local hot melt adhesive layer 50 before heating, so that the air is not externally cut from the cutting line 21. The location enters the content chamber 72, so the case applies to both vacuum and non-vacuum packaging.

Of course, the composite film 100 of FIGS. 1 to 3 is also applicable to the film 70 in the food heating automatic pressure regulating package 300 of the present embodiment, but the package is not Suitable for use on vacuum packaging.

The above is only the preferred embodiment provided by the present invention, and is not intended to limit the scope of the presently-created embodiments. All of the related art in the art should be equally changed according to the present creation, and should belong to the present invention. The scope of coverage.

100‧‧‧Food heating automatic pressure regulating packaging composite film

10‧‧‧First film

20‧‧‧Second film

30‧‧‧Local release layer

40‧‧‧Adhesive layer

21‧‧‧ cut line

D1, d2‧‧‧ width

Claims (12)

A composite film for use in a food heating automatic pressure regulating package, the composite film comprising: a first film layer, the first film layer is coated with a partial release layer in a predetermined width; a second film layer, The second film layer is provided with a cutting line corresponding to the position of the partial release layer; an adhesive layer, the adhesive layer is interposed between the first film layer and the second film layer, and the first film layer and the second film layer The film layers are glued together, and at the position of the partial release layer, the first film layer and the second film layer form a false adhesion. The composite film for use in a food heating automatic pressure regulating package according to the first aspect of the patent application, wherein the partial release layer and the adhesive layer have a partial hot melt adhesive layer, and the width of the local hot melt adhesive layer Greater than or equal to the width of the partial release layer, and the partial release layer is covered to separate the partial release layer from the adhesive layer. The composite film for use in a food heating automatic pressure regulating package according to claim 1 or 2, wherein the width of the partial release layer is greater than the width of the cutting line, and the width of the partial release layer Less than the width of the adhesive layer. The composite film for use in food heating automatic pressure regulating packaging according to claim 1 of the scope of the patent application, wherein the first film layer is nylon, acrylic, polyester, polyethylene, polypropylene, polyaluminum , ethylene styrene copolymer, cyclic olefin copolymer, polyethylene terephthalate, ethylene-vinyl alcohol copolymer, ethyl acetate ethyl acetate, ionic polymer compound, polyethylene glycol to naphthalene Acid ester, polyether ketone, polyfluorene, Styrene acrylonitrile copolymer, polyarylene, polyvinyl alcohol, polyacrylonitrile, polyurethane, nylon, polycarbonate, wax paper, polymer multilayer coextruded stretch film, synthetic paper, cellophane, polymer material A film made of paper, paper or aluminum foil, an aluminum foil laminated film, an electroplated PET film, a BOPP film, a CPP film or a multilayer film composed of two or more layers of a film. The composite film for use in the food heating automatic pressure regulating package according to the first aspect of the patent application, wherein the second film layer is a single layer film made of PP, ABS, CPP, LLDPE, CMPS material or two A multilayer film formed by laminating the above single layer film. The invention relates to a food heating automatic pressure regulating package, comprising: a box body having a bottom portion and a periphery extending from the bottom side to a side, the circumference surrounding the content chamber, the inner side of the top of the circumference being an open mouth; a composite film The composite film is heat-sealed and fixed on the periphery of the casing, and the open port is closed. The composite film comprises a first film layer, a second film layer and an adhesive layer, and the first film layer is coated with a predetermined width. a layer of partial release layer, wherein the second film layer is provided with a cutting line corresponding to the position of the partial release layer, and the adhesive layer is interposed between the first film layer and the second film layer, and the first film layer and the first film layer The two film layers are glued together, and at the position of the partial release layer, the first film layer and the second film layer form a pseudo adhesive, and the second film layer of the composite film is adjacently adhered to the periphery of the box body, and The cutting line of the second film layer is at the location of the heat seal and extends to the content chamber. A food heating automatic pressure regulating package comprising a closed film bag composed of two membranes, the film bag having a content chamber and at least one heat sealing mouth, wherein at least one film system A composite film comprising a first film layer, a second film layer and an adhesive layer, the first film layer being coated with a partial release layer in a predetermined width, the second film layer corresponding to the foregoing The position of the partial release layer is provided with a cutting line, and the adhesive layer is interposed between the first film layer and the second film layer, and the first film layer and the second film layer are glued together, and the partial release layer is Position, the first film layer and the second film layer form a false adhesion, wherein the second film layer of the composite film is adjacent to another mold, and the cutting line of the second film layer is at a position of the heat seal Extend to the content room. The food heating automatic pressure regulating package according to claim 6 or 7, wherein the partial release layer and the adhesive layer have a partial hot melt adhesive layer, and the width of the local hot melt adhesive layer is greater than or Equal to the width of the partial release layer, and the partial release layer is covered to separate the partial release layer from the adhesive layer. The food heating automatic pressure regulating package according to claim 6 or 7, wherein the width of the partial release layer is greater than the width of the cutting line, and the width of the partial release layer is smaller than the width of the adhesive layer. . The food heating automatic pressure regulating package according to claim 6 or 7, wherein the first film layer is nylon, acrylic, polyester, polyethylene, polypropylene, polyaluminum, ethylene Styrene copolymer, cyclic olefin copolymer, polyethylene terephthalate, ethylene-vinyl alcohol copolymer, ethyl acetate ethyl acetate, ionic polymer compound, polyethylene glycol p-naphthalate , polyether ketone, polyfluorene, styrene acrylonitrile copolymer, polyarylene, polyvinyl alcohol, polyacrylonitrile, polyurethane, nylon, polycarbonate, wax paper, polymer multilayer coextruded stretch film, synthetic paper, a film made of cellophane, polymer coated paper, paper, aluminum foil, An aluminum foil laminated film, an electroplated PET film, a BOPP film, a CPP film, or a multilayer film composed of a composite of two or more layers. The food heating automatic pressure regulating package according to the sixth or seventh aspect of the patent application, wherein the second film layer is a single layer film made of PP, ABS, CPP, LLDPE or CMPS material or two or more types. A multilayer film formed by laminating a film. The food heating automatic pressure regulating package according to claim 6, wherein the periphery of the box body has a top ring edge, and the composite film is heat sealed and fixed on the top ring edge.