TWI699312B - Coffee bag and its exhaust film - Google Patents

Abstract

The present invention is to provide a coffee bag and its vent film, which can solve the problem that the coffee bag vent film in the prior art is blocked by the internal pressure and cannot be vented. The present invention includes at least one inner film layer and an outer film layer laminated by glue. The outer film layer is provided with an outlet, the inner film layer is provided with an inlet, and an exhaust channel is provided between the outlet and the inlet. The outlet is on the exhaust channel. In addition, an inlet top piece is provided on the exhaust channel between the outer membrane layer and the inner membrane layer. A gap is formed at the entrance to connect the inlet and the exhaust channel, so that the gas inside the coffee bag can be discharged , Solve the problem that the internal pressure of the coffee bag causes the inlet to be locked and cannot exhaust.

Description

Coffee bag and its exhaust film

The present invention relates to a coffee bag for packaging, especially a coffee bag with automatic air exhaust and its air exhaust film.

Press, food packaging bags, such as coffee beans packaging bags, because coffee beans produce gas, the bag containing 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 coffee beans. In addition to its flavor, 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 be from production to sales. Cause mess and management problems.

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 manufacture and assembly of the elements are troublesome, and they must be assembled into the bag. Above, it is not only very labor-intensive and slow, and it is impossible to use the usual automated production equipment, cost Naturally improve.

Taiwan's new patent No. M528294 (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) proposes a bag and its Exhaust membrane, the exhaust membrane includes an inner membrane layer and an outer membrane layer, the inner membrane layer is provided with an inlet, the outer membrane layer is provided with an outlet, between the inner membrane layer and the outer membrane layer from the inlet to the outlet There is a release channel. The release channel is equipped with a gate made of self-adhesive. The gas generated by the coffee beans is used to generate pressure to separate the gate from the release channel. The gas can be discharged, and the pressure in the bag drops. The type channel is closed again. The problem is that the exhaust film of this kind of bag is a laminate of the inner and outer film layers, and the inner and outer film layers are very thin and soft. Therefore, when there is internal pressure in the bag, the inner film 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 smoothly enter the release channel from the inlet of the inner film layer to be discharged, and cannot achieve its original predetermined exhaust function. The yield of the finished product 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 at the hole will flow to the back through the hole, which will affect the manufacturing process and cause pollution problems.

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, and the outer film The layer is provided with at least one outlet, an exhaust passage is provided between the outer film layer and the inner film layer from the inlet to the outlet, and there is an inlet top member between the outer film layer and the inner film layer, and the inlet top member is close to Or at the edge of the inlet, there is a gap between the outer membrane layer and the inner membrane layer beside the inlet top member, and the gap connects the exhaust channel and the inlet.

The above 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, There is a layer of self-adhesive in the part of the exhaust passage between the outlet and the inlet, and the self-adhesive is coated on the outer film layer and is 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 a release paper, and the release paper is attached to the aluminum foil layer.

The above-mentioned coffee bag vent film, wherein 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 part 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 and 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 vent film, the surface layer is PET or kraft paper.

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

In addition, the present invention provides a coffee bag, which is produced by the application The coffee bag exhaust film described in any one of items 1 to 10 of the patent scope is made.

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 manufacturing 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 is unable to vent due to the internal pressure in the bag and the inlet is blocked.

100, 200, 300‧‧‧Coffee bag exhaust film

10‧‧‧Outer membrane layer

20‧‧‧Inner membrane layer

30‧‧‧Imported top-height parts

40‧‧‧Adhesive layer

11‧‧‧Exit

12‧‧‧Valve

21‧‧‧Import

42‧‧‧Exhaust Channel

14‧‧‧Surface

15‧‧‧Aluminum foil layer

50‧‧‧bag

51‧‧‧Inside the bag

53‧‧‧Gas

43‧‧‧Gap

52‧‧‧Outside the bag

60‧‧‧Adhesive

61‧‧‧Release layer

Figure 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.

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

Fig. 4 is a cross-sectional view of 4-4 in Fig. 3.

Fig. 5 is a cross-sectional view of 5-5 in Fig. 4.

Figure 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.

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

Figure 8 is an external view of a coffee bag made of a coffee bag vent film according to the present invention.

Figure 9 is a 9-9 section line view of Figure 8.

The tenth is the 10-10 cross-sectional view of Fig. 9.

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

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

Figure 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 of Fig. 13.

Figure 15 is another state diagram of Figure 14.

Figure 16 is an exploded schematic view of the third embodiment of the present invention.

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

Figure 18 is a cross-sectional view taken along line 18-18 of Figure 17.

Figure 19 is another state diagram of Figure 18.

In order to enable your reviewer to have a better understanding of the features and characteristics of the present invention, the following preferred embodiments are listed and illustrated in conjunction with the drawings as follows: Please refer to Figures 1 to 6, which are the coffee bag vent membranes of the present invention In the first preferred embodiment of 100, for the convenience of description, Figures 1 to 6 only show partial fragments of the coffee bag vent film 100, while Figure 7 shows the coffee bag vent after being continuously laminated and rolled up. Schematic diagram of the appearance of the film 100. In addition, in different embodiments, the same elements use the same symbols.

The coffee bag exhaust 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 an embodiment, an outlet 11 is provided on the outer film layer 10, The outlet 11 is a hole that penetrates both sides of the adventitia layer 10. In one embodiment, the outlet 11 is left with a valve 12, which leaves the membrane on the hole to become the valve 12 when punching the hole, so that glue Or release agent, the rubber heel release agent will not leak to the back. In addition, the outlet 11 can also be in other forms, for example, set at the edge of the outer film layer 10. For this method, please refer to the content of the exhaust film in the prior art, which 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 connected to the exhaust channel 42. This embodiment The outlet 11 and the inlet 21 are both on the exhaust passage 42. The method for forming the exhaust passage 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 passage 42 so that the outer film layer at the position of the exhaust passage 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 arranged between the outer film layer 10 and the inner film layer 20, and on the exhaust channel 42, and the inlet jack 30 is set close to or at the edge of the inlet 21 , So that there is a gap 43 between the outer film layer 10 and the inner film layer 20 at a position beside the entrance top member 30, and the gap 43 connects the exhaust passage 42 and the inlet 21. The gap 43 makes the inlet 21 There is no lock-up with the exhaust passage 42. In one embodiment, the inlet top height The component 30 is a thermosetting hot melt adhesive, which is to coat the thermosetting hot melt adhesive on the outer film layer 10 by spraying, which can be applied on the outer film layer 10 accurately and quickly.

In one embodiment, the outer film layer 10 includes a surface layer 14 and an aluminum foil layer 15 glued and laminated (see Figure 6). The glue in between is a common 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, heat-sealable materials such as linear low density polyethylene (LLDPE) or no Stretched polypropylene (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 wound into the form shown in 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 Figures 8 to 10, and Figure 8. In the figure, the bag 50 made of the coffee bag exhaust film 100 of the present invention is filled with coffee beans (not shown). When the coffee beans generate gas and fill the bag 50, the gas 53 inside the bag 51 (see 9~10 The arrow in the figure) will enter through the inlet 21 in the inside 51 of the bag, and will 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. Squeezed together and locked, which can completely solve the problem of The problem of being locked and unable to exhaust.

Please refer to Figures 11 to 15, which is the second embodiment of the coffee bag vent membrane 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 there is an exhaust channel 42 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 in 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 A layer of self-adhesive 60 is applied to part of the paragraphs, which is preferably applied to 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 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 blocking of the adhesive 60 In the inner 51, and when the pressure inside the bag 51 is greater than the pressure outside the bag 52, the sticker 60 can be opened and the gas 53 can be smoothly discharged (refer to Figure 15). The test results found that the sticker 60 is coated The exhaust effect in part of the exhaust passage 42 is better than the exhaust effect in which all the exhaust passages 42 are 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 uses release paper. This part will be described together in the next embodiment.

Please refer to Figures 16 to 19, which is the third embodiment of the coffee bag vent film 300 of the present invention. The third embodiment is the same as the first embodiment, and it 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 of 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 via the adhesive layer 40 by the isolation layer 16 and the discharge between the outlet 11 and the inlet 21 between the outer film layer 10 and the inner film layer 20 A part of the air 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 a layer of non-release layer 61 is applied. 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 outlet 11, and then the outer film layer 10 and the inner film layer 20 are glued together by the isolation layer 16 To 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.

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, due to the barrier of the adhesive 60, the outside air cannot enter the bag through the outlet 11 of the outer membrane layer 10 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 (refer to Fig. 19), please refer to the first embodiment for other features.

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

The above disclosures are only the preferred embodiments provided by the present invention and are not intended to limit the scope of implementation of the present invention. All the equivalent changes made by those skilled in the art based on the present invention shall belong to the present invention. The scope of coverage.

100‧‧‧Coffee bag exhaust film

12‧‧‧Valve

10‧‧‧Outer membrane layer

20‧‧‧Inner membrane layer

30‧‧‧Imported top-height parts

40‧‧‧Adhesive layer

11‧‧‧Exit

21‧‧‧Import

Claims (11)

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, the outer film layer and the inner film layer An exhaust passage is provided between the membrane layers 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, so that the outer membrane layer and the inner membrane layer There is a gap between the film layers beside the inlet top piece, and the gap connects the exhaust channel and the inlet. According to the coffee bag vent film described in item 1 of the scope of patent application, the section of the vent passage between the outlet and the inlet has a layer of adhesive. According to the coffee bag and its vent film described in item 2 of the scope of patent application, the adhesive is coated on the outer film layer and is close to the outlet. According to the coffee bag exhaust film described in item 2 or item 3 of the scope of patent application, 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 and the inner film layer are adjacent to Then, the adhesive is coated on the aluminum foil layer, and the inner film layer is a heat-sealing material layer. According to the coffee bag vent film described in item 2 or item 3 of the scope of patent application, there is a release layer between the sticker and the outer film layer. According to the coffee bag vent film described in item 5 of the patent application, 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 Adjacent to the inner film layer, the release agent is coated on the isolation layer, and on the exhaust channel, the inner film layer is a heat-sealing material layer. According to the coffee bag exhaust film described in item 6 of the scope of patent application, the isolation layer is selected from ink, PET, OPP or PE material. According to the coffee bag exhaust film described in item 6 of the scope of patent application, the surface layer is PET or kraft paper. According to the coffee bag vent film described in item 5 of the scope of patent application, the release layer is release paper. According to the coffee bag vent film described in item 1 of the scope of patent application, the inlet top member is a thermosetting hot melt adhesive provided on the outer film layer. A coffee bag, which is made of the coffee bag vent film described in any one of items 1 to 10 in the scope of patent application.

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