WO2021035593A1 - Gas discharge film for coffee packet and coffee packet - Google Patents

Abstract

A coffee packet (50) and a gas discharge film (100, 200, 300) thereof, which can solve the problem in the prior art that gas cannot be discharged when an inlet is blocked by an internal pressure of a gas discharge film for a coffee packet. The gas discharge film for a coffee packet comprises at least one inner film layer (20) and one outer film layer (10) which are laminated by adhesive; the outer film layer is provided with an outlet (11), the inner film layer is provided with inlets (21), and gas discharge passages (42) are provided between the outlet and the inlets, the inlets and the outlet being provided on the gas discharge passages; in addition, inlet spacers (30) are provided on the gas discharge passages between the outer film layer and the inner film layer; gaps (43) are formed at the inlets to connect the inlets and the gas discharge passages, so as to discharge gas (53) inside a coffee packet. The present invention solves the problem that gas cannot be discharged when the inlet is blocked by an internal pressure of the coffee packet.

Description

Coffee bag exhaust film and coffee bag Technical field

The invention relates to a coffee bag for packaging, in particular to an automatically exhausted coffee bag and an exhaust film thereof.

Background technique

Food packaging bags, such as coffee beans packaging bags, because coffee beans produce gas, the bag containing the coffee beans will be filled with gas and swell. If the gas cannot be discharged, in addition to the smell of grease, it will affect the flavor of the coffee beans. In addition, it may even cause the bag to burst. When the bag is swollen, storage and transportation will take up too much space and it is not easy to handle. If the bag bursts, it will cause loss and cannot be sold. It will also cause mess and mess from production to sales. Management issues.

Summary of the invention

technical problem

Therefore, there is a product on the market that is equipped with a vent valve inside the bag. This vent valve uses a combination of several components including a valve body, a filter cover, a filter, and a valve to achieve a one-way ventilation effect. The gas in the bag can be discharged to the outside through the breather valve, and the outside gas and dirt will not enter the inside of the bag.

Although this kind of bag can have the above-mentioned effects, the vent valve element must be processed and assembled twice, and then processed by other equipment and packaged on the finished bag or automatic roll packaging material. The manufacturing and assembly of the element is troublesome, and it needs to be assembled into the bag. The above is not only very labor intensive and slow, and the usual automatic production equipment cannot be used, so the cost will naturally increase.

Taiwan, China's new patent No. M28294 (U.S. corresponding application number 15/174,647, Australian corresponding application number 2016100878, German corresponding application number 202016103303.9, Chinese mainland corresponding application number 201620467142.3, Japanese corresponding application number Real wish 2016-002624) Bag and its venting membrane, the venting membrane includes an inner membrane layer and an outer membrane layer, the inner membrane layer is provided with an inlet, and the outer membrane layer is provided with an outlet, and the inlet is connected between the inner membrane layer and the outer membrane layer. There is a release channel between the outlets, and a gate made of self-adhesive is installed in the release channel. The coffee beans are used to generate gas to make the bag generate pressure to separate the gate from the release channel, the gas can be discharged, and the pressure in the bag drops. , The gate and the release channel are closed again. The problem is that the vent membrane of this kind of bag is a laminate of the inner membrane layer and the outer membrane layer, and the inner membrane layer and the outer membrane layer are very thin and soft. Therefore, when there is internal pressure in the bag, the inner membrane The layer and the outer film layer are squeezed together to form a situation where the inlet is blocked. Therefore, the gas in the bag cannot enter the release channel smoothly from the inlet of the inner film layer to be discharged, and cannot achieve its predetermined exhaust function. The finished product The yield rate is very low. Furthermore, the outlet of the outer membrane layer in the exhaust membrane is a hole. When glue or release agent is applied, the glue or release agent in the hole will flow to the back through the hole, which will affect the manufacturing process and cause pollution problems.

The solution to the problem

Technical solutions

How to solve the above-mentioned problems is the main subject of the present invention. After countless experiments and continuous trials by the inventor over the years, the present invention came into being.

The present invention provides a coffee bag vent film, comprising at least one inner film layer and an outer film layer laminated by glue, the inner film layer is provided with at least one inlet, the outer film layer is provided with at least one outlet, and the outer film An exhaust passage is provided between the inner membrane layer and the inner membrane layer from the inlet to the outlet, and there is an inlet top piece between the outer membrane layer and the inner membrane layer. The inlet top piece is close to or at the edge of the inlet, making the There is a gap between the outer film layer and the inner film layer beside the inlet top member, and the gap connects the exhaust channel and the inlet.

The above-mentioned coffee bag vent film, wherein the outer film layer includes a surface layer and an aluminum foil layer glued and laminated from the outside to the inside, the aluminum foil layer is adjacent to the inner film layer, and the inner film layer is a heat-sealing material layer. The part of the exhaust passage between the outlet and the inlet is provided with a layer of self-adhesive, which is coated on the outer film layer and close to the outlet. In one embodiment, there is a release layer between the sticker and the outer film layer. Preferably, the release layer is release paper, and the release paper is attached to the aluminum foil layer.

In the above-mentioned coffee bag vent film, the outer film layer includes a surface layer, an aluminum foil layer and an isolation layer from the outside to the inside, the isolation layer is adjacent to the inner film layer, and the inner film layer is a heat-sealing material layer, In the section of the exhaust passage between the outlet and the inlet, there is a layer of adhesive, which is coated on the outer film layer and is close to the outlet. In another embodiment, the adhesive is combined with There is a release layer between the outer film layers. Preferably, the release layer is composed of a release agent, the release agent is coated on the isolation layer, and the isolation layer is selected from ink, PET, OPP or PE materials.

In the above-mentioned coffee bag exhaust film, the surface layer is PET or kraft paper.

In the above-mentioned coffee bag vent film, the inlet top member is provided with a thermosetting hot melt adhesive on the outer film layer.

In addition, the present invention provides a coffee bag, which is made of the coffee bag vent film according to any one of claims 1 to 10.

The coffee bag exhaust film of the present invention can be produced using automated production equipment, and can be made into bags through consistent production equipment. At the same time, it can be directly filled with coffee beans on-line. The production speed is fast, and no additional combination is required. It can be directly used as a part of a coffee bag or a bag, which can solve the problem of the prior art venting valve with many elements, complex structure, troublesome manufacture and assembly, and must be separately assembled on the bag, resulting in slow production speed, labor intensive and high cost The problem can also solve the problem that the bag vent membrane in the prior art cannot vent due to the internal pressure in the bag and the inlet is blocked.

The beneficial effects of the invention

Brief description of the drawings

Description of the drawings

Fig. 1 is an exploded schematic diagram of the first embodiment of the present invention.

Figure 2 is a partial exploded view of the first embodiment of the present invention.

Fig. 3 is a schematic plan view of the first embodiment of the present invention.

Fig. 4 is a cross-sectional view taken along line 4-4 in Fig. 3.

Fig. 5 is a sectional view taken along line 5-5 of Fig. 4;

6 is a schematic cross-sectional view of the outer film layer of the first embodiment of the present invention. The image does not show the valve.

Fig. 7 is a schematic diagram of the coffee bag vent film of the present invention being wound up after being manufactured.

Fig. 8 is an appearance view of a coffee bag made from a coffee bag vent film of the present invention.

Fig. 9 is a 9-9 sectional line view of Fig. 8.

Fig. 10 is a sectional view taken along line 10-10 in Fig. 9.

Fig. 11 is an exploded schematic diagram of the second embodiment of the present invention.

Fig. 12 is a partial exploded view of the second embodiment of the present invention.

Fig. 13 is a schematic plan view of the second embodiment of the present invention.

Fig. 14 is a cross-sectional view taken along line 14-14 in Fig. 13.

Fig. 15 is another state diagram of Fig. 14.

Fig. 16 is an exploded schematic diagram of the third embodiment of the present invention.

Fig. 17 is a schematic plan view of the third embodiment of the present invention.

Fig. 18 is a sectional view taken along line 18-18 in Fig. 17.

Fig. 19 is another state diagram of Fig. 18.

Description of Reference Signs

Coffee bag exhaust film 100, 200, 300

Outer membrane layer 10 Inner membrane layer 20

Imported top piece 30 Adhesive layer 40

Exit 11 Valve 12

Import 21 Exhaust channel 42

Surface layer 14 Aluminum foil layer 15

Bag 50 Inside the bag 51

Gas 53 Gap 43

Outside of the bag 52 Self-adhesive 60

Release layer 61.

The best embodiment for implementing the invention

The best mode of the present invention

The following preferred embodiments are listed and explained in conjunction with the specification as follows:

Please refer to Figures 1 to 6, which are a first preferred embodiment of the coffee bag vent membrane 100 of the present invention. For the convenience of description, Figures 1 to 6 only show partial fragments of the coffee bag vent membrane 100, and Fig. 7 shows a schematic diagram of the appearance of the coffee bag vent film 100 rolled up after being continuously laminated. In addition, in different embodiments, the same elements use the same symbols.

The coffee bag vent film 100 of the present invention includes an outer film layer 10 and an inner film layer 20, which are laminated and laminated by a viscose layer 40, and an imported top piece is provided between the outer film layer 10 and the inner film layer 20 30.

In one embodiment, an outlet 11 is provided on the adventitia layer 10, and the outlet 11 is a hole that penetrates both sides of the adventitia layer 10. In an embodiment, the outlet 11 is left with a valve 12, which is perforated At this time, the membrane on the hole position is left to become the valve 12, so that when the glue or release agent is applied, the rubber heel release agent will not leak to the back side. In addition, the outlet 11 can also be in other forms, for example, set at the edge of the outer film layer 10. This method can refer to the content of the exhaust film in the prior art, and it will not be repeated here.

In one embodiment, the inner membrane layer 20 is provided with at least one inlet 21. The figure shows that the inlet 21 is a hole that penetrates both sides of the inner membrane layer 20, while the embodiment has two inlets 21.

In one embodiment, an exhaust channel 42 is provided between the outer film layer 10 and the inner film layer 20, and at least a part of the outlet 11 and the inlet 21 are on the exhaust channel 42. In this embodiment, Both the outlet 11 and the inlet 21 are on the exhaust passage 42. The method for forming the exhaust channel 42 is that when the adhesive layer 40 is placed between the outer film layer 10 and the inner film layer 20, the adhesive layer 40 is not placed at the position of the exhaust channel 42 so that the outer film layer at the position of the exhaust channel 42 There is no adhesive layer 40 between 10 and the inner membrane layer 20, and an exhaust channel 42 is formed.

In one embodiment, the inlet jack 30 is provided between the outer film layer 10 and the inner film layer 20 and on the exhaust channel 42, and the inlet jack 30 is provided close to or at the edge of the inlet 21, The outer film layer 10 and the inner film layer 20 have a gap 43 at a position next to the inlet top member 30, and the gap 43 connects the exhaust passage 42 and the inlet 21, and the inlet 21 and the inlet 21 are connected to each other through the gap 43 There is no blocking between the exhaust passages 42. In one embodiment, the inlet top member 30 is a thermosetting hot melt adhesive, which is sprayed to coat the thermosetting hot melt adhesive on the outer film layer 10, which can be applied consistently and accurately and quickly. On the outer film layer 10.

In one embodiment, the outer film layer 10 includes a surface layer 14 and an aluminum foil layer 15 glued and laminated (refer to FIG. 6). The glue in between is a general technique, so it is not shown in the figure, and the surface layer can be PET Or kraft paper. The outer film layer 10 is adjacent to the inner film layer 20 by the aluminum foil layer 15 and is glued together by the adhesive layer 40; as for the inner film layer 20, a heat-sealable material such as linear low-density polyethylene (LLDPE) or non-extended polymer is used. Propylene (Cast Polypropylene, CPP). The outer film layer 10, the inner film layer 20, and other components are completed and pasted into the exhaust film 100 of the present invention through a consistent operation, and then wound into the form of FIG. 7.

The above is an introduction to the various components and assembly methods of a coffee bag vent membrane 100 provided by a preferred embodiment of the present invention, and then its use characteristics are described as follows:

Please refer to FIGS. 8-10. The bag 50 made of the coffee bag exhaust film 100 of the present invention in FIG. 8 is filled with coffee beans (not shown). When the coffee beans generate gas and fill the bag 50, The gas 53 in the inside of the bag 51 (refer to the arrows in FIGS. 9 to 10) will enter through the inlet 21 in the inside of the bag 51, and be discharged from the outlet 11 through the gap 43 and the exhaust passage 42. Since the present invention is provided with an inlet top member 30 at the position of the inlet 21 between the outer membrane layer 10 and the inner membrane layer 20, the inlet 21 will not be caused by the pressure inside the bag 51 between the outer membrane layer 10 and the inner membrane layer 20. Squeezing together to lock can completely solve the problem of inability to exhaust air due to the locked inlet in the prior art.

Please refer to FIGS. 11-15, which are the second embodiment of the coffee bag vent film 200 of the present invention. This embodiment is the same as the first embodiment, and it also includes an outer film layer 10, an inner film layer 20, An inlet top member 30 and an adhesive layer 40, the outer film layer 10 has an outlet 11, the inner film layer 20 has an inlet 21, and an exhaust channel 42 is provided between the outer film layer 10 and the inner film layer 20, and The inlet 21 and the outlet 11 are on the exhaust channel 42 and other features. The difference of this embodiment is the difference between the outlet 11 between the outer film layer 10 and the inner film layer 20 and the exhaust channel 42 between the inlet 21 Some sections are coated with a layer of self-adhesive 60, which is preferably coated on the outer film layer 10 near the outlet 11, and then the outer film layer 10 and the inner film layer 20 are glued together.

In the bag made of the coffee bag vent membrane 200 of this embodiment, when the pressure inside the bag 51 is lower than the pressure outside the bag 52, the outside air cannot enter the bag through the outlet 11 of the outer membrane layer 10 due to the blocking of the adhesive 60 In the inner 51, and when the pressure inside the bag 51 is greater than the pressure on the outside 52 of the bag, the sticker 60 can be opened and the gas 53 can be smoothly discharged (refer to Figure 15). The test results show that the sticker 60 is coated on The exhaust effect of part of the exhaust passage 42 is better than that of all exhaust passages 42 being coated with the adhesive 60. Please refer to the first embodiment for other features.

In another embodiment, a release layer 61 is laid before applying the layer of self-adhesive 60, and the release layer 61 is made of release paper. This part will be described together in the next embodiment.

Please refer to Figures 16 to 19, which are the third embodiment of the coffee bag vent film 300 of the present invention. The third embodiment is the same as the first embodiment, which also includes an outer film layer 10 and an inner film layer 20. , The inlet top member 30 and an adhesive layer 40, the outer film layer 10 has an outlet 11, the inner film layer 20 has an inlet 21, and there is an exhaust channel 42 between the outer film layer 10 and the inner film layer 20, The inlet 21 and the outlet 11 are on the exhaust channel 42 and other features. The difference in this embodiment is that in addition to the surface layer 14 and the aluminum foil layer 15, the outer film layer 10 has an isolation layer 16 attached to the aluminum foil layer. 15. The outer film layer 10 is bonded to the inner film layer 20 through the adhesive layer 40 through the isolation layer 16, and the exhaust gas between the outlet 11 and the inlet 21 between the outer film layer 10 and the inner film layer 20 A part of the passage 42 is coated with a release layer 61, the release layer 61 is a release agent, the release agent is coated on the isolation layer 16, and another layer of non-stick coating is applied on the release layer 61 Dry glue 60, the release layer 61 and the self-adhesive 60 are preferably coated on the outer film layer 10 and close to the exit 11, and then the outer film layer 10 and the inner film layer 20 are glued together through the isolation layer 16. Separate the release layer 61 and the aluminum foil layer 15 to prevent toxicity caused by the contact reaction between the release agent and the aluminum foil layer 15, that is, platinum poisoning. In an embodiment, the isolation layer is made of ink, PET, OPP or PE material.

In the bag made of the coffee bag vent membrane 300 of this embodiment, when the pressure inside the bag 51 is less than the pressure outside the bag 52, the outside air cannot enter the bag through the outlet 11 of the outer membrane layer 10 due to the obstruction of the adhesive 60 In the inner 51 (refer to Figure 18), and when the pressure inside the bag 51 is greater than the pressure on the outside 52 of the bag, the self-adhesive 60 can be opened and the gas 53 can be smoothly discharged (refer to Figure 19). For other features, please refer to the first Examples.

In another embodiment, the release layer 61 may also be release paper, and the release paper may be pasted on the outer film layer 10. If the release layer 61 is release paper, the isolation layer 16 may also be No, but directly stick the release paper to the aluminum foil layer 15 (not shown in the figure), which can also achieve the goal.

The above description is only the preferred embodiments provided by the present invention, and is not intended to limit the scope of implementation of the present invention. All equal changes made by those skilled in the art based on the present invention should be protected by the claims of the present invention. range.

Claims (10)

A coffee bag vent film, which is characterized by comprising at least one inner film layer and an outer film layer laminated by glue, the inner film layer is provided with at least one inlet, the outer film layer is provided with at least one outlet, and the outer film An exhaust channel is provided between the inner membrane layer and the inner membrane layer from the inlet to the outlet, and there is an inlet jacking piece between the outer membrane layer and the inner membrane layer, and the inlet jacking piece is close to or at the edge of the inlet so that the There is a gap between the outer film layer and the inner film layer beside the inlet top member, and the gap connects the exhaust channel and the inlet. The coffee bag vent membrane according to claim 1, wherein the part of the vent passage between the outlet and the inlet has a layer of self-adhesive. The coffee bag and its vent film according to claim 2, wherein the self-adhesive is coated on the outer film layer and is close to the outlet. The coffee bag vent film according to claim 2 or claim 3, wherein the outer film layer includes a surface layer and an aluminum foil layer glued and laminated from the outside to the inside, and the aluminum foil layer is adjacent to the inner film layer, The self-adhesive is coated on the aluminum foil layer, and the inner film layer is a heat-sealing material layer. The coffee bag vent film according to claim 2 or claim 3, wherein there is a release layer between the sticker and the outer film layer. The coffee bag vent film of claim 5, wherein the release layer is a release agent, and the outer film layer includes a surface layer, an aluminum foil layer, and an isolation layer from outside to inside, and the isolation layer and The inner film layer is adjacent, the release agent is coated on the isolation layer, and on the exhaust channel, the inner film layer is a heat-sealing material layer. The coffee bag vent film according to claim 6, wherein the isolation layer is selected from ink, PET, OPP or PE materials. The coffee bag exhaust film of claim 6, wherein the surface layer is PET or kraft paper. The coffee bag vent film of claim 5, wherein the release layer is release paper. The coffee bag vent film of claim 1, wherein the inlet top member is provided with a thermosetting hot melt adhesive on the outer film layer. A coffee bag, characterized in that the coffee bag is made of the coffee bag vent film according to any one of claims 1 to 10.

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