JP2003235733A - Dripping cartridge - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dripping cartridge which can be prepared cheaply, is disposable, can reduce its packed volume, can reduce the shipping cost and can improve the portability. <P>SOLUTION: This dripping cartridge has a cartridge-shaped base material layer 13 which is made of a thermoplastic synthetic resin material and has an extraction hole 11 at the bottom and a nonwoven fabric layer 14 which is made of a thermoplastic synthetic resin material and is laminated wholly on the inside or outside of the base material layer 13 to cover the extraction hole 11 and constitute a filter 12 in the extraction hole 11. This dripping cartridge is prepared by laminating a nonwoven sheet made of a thermoplastic synthetic resin material having a filter function wholly on at least one side of a bored thermoplastic synthetic resin sheet and then subjecting this laminated material sheet to a sheet-forming operation to form it into a cartridge shape having an extraction hole at the bore. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drip cartridge suitable for use as a disposable simple coffee drip and a method for manufacturing the same.

[0002]

2. Description of the Related Art As a drip filter for roasted coffee, one in which a bag-shaped non-woven fabric or paper filter is set in a funnel-shaped dedicated device is widely used. Cartridges made by enclosing roasted coffee powder in a non-woven container are used by mounting them on the bottom of a dedicated device, as well as disposable integrated cartridges that combine a water-resistant paper body with a filter. ing. Of these, the ones that use special equipment are filters and cartridges that are disposable, but the special equipment must be washed each time it is used, and since the special equipment may be bulky, it is especially convenient for outdoor use. There was a lack of point. Further, the water-resistant paper cartridge has a problem that the manufacturing cost is high because the structure is complicated and the number of processing steps is large.

[0003]

Generally, in the case of making an integral type drip filter in which a main body and a filter are integrated, a cup-shaped main body having an extraction port formed on the bottom is manufactured. Then, a method of adhering a non-woven fabric or filter paper acting as a filter to the bottom of the main body so as to close the extraction port is used. Even in the cartridge containing the roasted coffee, the non-woven fabric container that contains the roasted coffee powder and performs the filter function and the main body portion that collects the hot water and flows it to the filter are separate members that are detachable as described above. In many cases, they are constructed and the two are bonded together by post-processing.

The applicant of the present invention believes that this is one of the factors that hinders the cost reduction and convenience improvement of the drip cartridge and the filter, and integrally molds the main body for storing hot water and the filter for extracting. By doing so, it is thought that it is possible to provide a disposable type cartridge with a drip filter for roasted coffee, which has high convenience and productivity and can be manufactured at low cost.

Further, in the conventional drip cartridge, if individual packaging such as pillow packaging is carried out one by one in order to improve convenience, the volume of the main body for storing hot water for one extraction is large and bulky for transportation. In addition, there is a problem that the storage efficiency is significantly reduced.

An object of the present invention is to provide a drip cartridge which can be manufactured at low cost, can be disposable, and can realize a reduction in packaging form, thereby reducing distribution costs and improving convenience when carrying. It is to be.

[0007]

A drip cartridge according to the present invention is made of a thermoplastic synthetic resin material, and has a cartridge-shaped base material layer having an extraction port formed on the bottom surface, and the extraction port is closed. And a non-woven fabric layer made of a thermoplastic synthetic resin material which is laminated on the entire outer surface or inner surface of the base material layer and constitutes a filter in the extraction port.

This cartridge can be manufactured by the manufacturing method as described in claim 6. That is, a non-woven fabric sheet having a filter function made of a thermoplastic synthetic resin material is laminated on at least one surface of a thermoplastic synthetic resin sheet which is preliminarily punched, and the laminated material sheet is used as the punched holes. It can be manufactured by forming a sheet into a cartridge shape so that the can becomes an extraction port.

More specifically, this cartridge can be manufactured by hot press molding using a match mold, and a thermoplastic synthetic resin sheet of polypropylene, polyester or the like is made to correspond to the mold arrangement of the molding device. , One or a plurality of punch holes that function as extraction ports when formed into a drip cartridge, and a nonwoven fabric sheet made of thermoplastic synthetic resin and laminated with a filter function so as to cover the punch holes As a material sheet, when the filter is formed, the filter part and the main body part are integrally formed at the same time while detecting the position of the hole so that the hole becomes an extraction port formed on the bottom surface of the drip cartridge. It can be manufactured by molding. Therefore, in this cartridge, at the stage of manufacturing the material sheet, a hole is formed in the thermoplastic synthetic resin sheet, and a non-woven sheet that functions as a filter is laminated and integrally formed into a sheet so that another step can be performed. Therefore, it is not necessary to perform the extraction process of the extraction port and the adhesion of the filter, and it is possible to efficiently manufacture the drip cartridge container at low cost.

Here, an accommodating portion is provided in the central portion of the bottom surface of the cartridge, roasted coffee powder is filled in the accommodating portion, and the roasted coffee powder is sealed in the accommodating portion on the bottom surface of the cartridge. Alternatively, a sealing sheet made of a non-woven fabric having water permeability may be attached. With this configuration,
A drip cartridge containing roasted coffee can be easily manufactured at low cost. Also, with this cartridge, there is no need for post-processing such as removing the holes in the extraction port and adhering the filter on the lower side, so it is possible to perform integrated processing up to the final product with a general automatic filling line with a molding machine. Becomes

The cartridge is composed of a flexible and bendable thermoplastic synthetic resin sheet, and the upper side wall or the lower side wall of the side wall is turned upside down at an intermediate portion in the height direction to turn it upside down. You may arrange | position a lower side wall part inside and set the total height low. In this case, the height of the side wall can be halved by folding the cartridge at the time of storage to reduce the volume at the time of handling. It can be stretched to its original shape and used easily. Further, even if individual packaging such as pillow packaging is performed, the volume can be reduced, so that the transportation cost can be reduced.

An annular step portion is formed at an intermediate portion in the height direction of the side wall portion of the cartridge, and the annular step portion and the wall portion to be reversed are smoothly connected by an arc surface, and the upper side wall is centered on the annular step portion. The entire height may be set low by folding the portion or the lower side wall portion and reversing it and disposing the lower side wall portion inside the upper side wall portion. When such an annular step portion is formed, the side wall surface can be relatively easily folded back around the annular step portion, and the distortion of the outer circumference when folded back can be reduced. Further, the position of the folded-back portion is stable, and the folded-back portion can be folded at the same height.

Vertical ribs extending in the expansion / contraction direction may be formed at intervals in the circumferential direction on the upper side wall or the lower side wall to be inverted. That is, in the wall portion to be inverted, the inner diameter side with a short circumference is arranged at the outer diameter side with a large circumference due to inversion at the time of molding, so wrinkles are likely to occur in the wall portion due to inversion. By providing a vertical rib extending in the expansion / contraction direction on the wall portion to be inverted, the wall portion to be inverted is provided with a slight elasticity in the circumferential direction to absorb wrinkles generated at the time of inversion, and It is possible to improve the appearance of the cartridge when the parts are inverted. In addition, it becomes possible to return the inverted wall surface to the original state more easily during use. The same effect can be obtained by forming the wall portion to be inverted so as to have a wave shape that oscillates in the radial direction along the circumferential direction.

In the method for producing a drip cartridge according to the present invention, a non-woven fabric sheet having a filter function made of a thermoplastic synthetic resin material is laminated on the entire surface of at least one surface of the thermoplastic synthetic resin sheet having a pre-drilled hole. Then, this laminated material sheet is formed into a cartridge shape so that the punched hole serves as an extraction port.

In this manufacturing method, since the filter can be integrally molded, it is not necessary to perform the punching process of the extraction port and the bonding process of the filter to the bottom surface in separate steps, and the manufacturing cost of the cartridge can be reduced. Particularly in the case of a cartridge filled with roasted coffee, it is possible to consistently process the final product by using an ordinary automatic filling machine with a molding device.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. As shown in FIGS.
The drip cartridge 1 includes a cup-shaped main body 2 and
Roasted coffee powder 4 filled in a container 3 formed at the bottom of the main body 2, and a sealing sheet 5 attached to the bottom surface of the main body 2 to seal the roasted coffee powder 4 in the container 3. Is equipped with.

Explaining the main body portion 2, the main body portion 2 has a side wall portion 6 and a bottom wall portion 7 having a diameter increasing toward the upper side, and a reinforcing flange portion is provided at an upper end portion of the side wall portion 6. 9 is formed by folding back, and a substantially flat annular mounting portion 10 for setting the cartridge 1 on the upper side of a coffee cup or the like is formed on the outer peripheral portion of the bottom wall portion 7. A housing portion 3 is provided in a substantially central portion of the bottom wall portion 7, an extraction port 11 is formed on the bottom surface of the housing portion 3, and a filter 12 made of a non-woven sheet is provided in the extraction port 11 so as to close the opening. It is stretched. Then, the required amount of roasted coffee powder 4 is filled in the housing portion 3 of the main body portion 2, and the sealing sheet 5 made of a non-woven fabric is placed so as to close the upper opening of the housing portion 3.
The cartridge 1 is manufactured by adhering it to the upper surface of the cartridge by heat sealing or the like. The extraction port 11 may be circular or polygonal. Further, it may be composed of a plurality of holes such as slits, fans, and small holes.

The main body 2 is laminated on the entire outer surface of the base material layer 13 so as to cover the extraction opening 11 and a cartridge-shaped base material layer 13 such as a cup made of a thermoplastic synthetic resin material. The inside of the filter 12 has a two-layer structure with a non-woven fabric layer 14 made of a thermoplastic synthetic resin material constituting the filter 12, and as described later, the synthetic resin sheet 50 constituting the base material layer 13 is made to correspond to the extraction port 11. To form a punched hole 51, a non-woven sheet 52 constituting the non-woven fabric layer 14 is laminated on the punched hole 51, and the laminated material sheet 54 is hot press molded into a cartridge shape. However, the nonwoven fabric layer 14 may be laminated on the entire inner surface of the base material layer 13.
Further, at the position corresponding to the base material layer 13, the nonwoven fabric layer 1
4 may be provided with a decorative hole or the like.

As the thermoplastic synthetic resin forming the base material layer 13, polyolefin synthetic resin materials such as polypropylene and polyethylene, those obtained by blending these synthetic resin materials with an inorganic filler, polyester, polycarbonate and the like are preferable. Available for

As the non-woven fabric constituting the non-woven fabric layer 14,
A base material layer 1 having the formability of long-fiber spunbonded non-woven fabric, etc.
A non-woven fabric made of a material having excellent heat fusion property with respect to No. 3 can be preferably used. Specifically, a long-fiber spunbonded non-woven fabric made of a thermoplastic synthetic resin material such as polyamide-based, polyacrylonitrile-based, polyester-based, polyvinyl alcohol-based, polypropylene-based, polyvinyl chloride-based, polyvinylidene chloride-based or the like can be used. In addition, the non-woven fabric layer 14
The basis weight of the non-woven fabric (non-woven fabric sheet 52) that composes is the roasted coffee powder 4 at an appropriate speed with the hot water poured into the main body 2.
The unit weight will be set so that it will be supplied into the coffee cup via the. The sealing sheet 5 is also made of the same material as the nonwoven fabric layer 14.

The main body 2 can be formed in any shape other than the cup shape. The capacity of the main body 2 is
It is set to be slightly larger than the capacity of a standard coffee cup, and by pouring hot water to the setting position of the main body 2, it may be possible to make one cup of coffee,
In order to set the height of the main body portion 2 as low as possible, the body portion 2 may be set to have a smaller capacity than a standard coffee cup, and hot water may be poured in a plurality of times.

This cartridge 1 is basically a simple cartridge which can be disposable, and the storage portion 3 is filled with an amount of roasted coffee powder 4 capable of containing one coffee cup of coffee. There is. However, it is also possible to fill the roasted coffee powder 4 in an amount capable of containing a plurality of cups of coffee.

When using the cartridge 1, all that is required is to set the cartridge 1 on a container such as a coffee cup and pour hot water into the main body 2 and the pouring hot water will seal the sealing sheet 5.
Is supplied to the roasted coffee powder 4 through the filter 12 and is supplied to the inside of the container through the filter 12 together with the extracted coffee.

In the present embodiment, the roasted coffee powder 4 is filled in the container 3, but it is possible to provide green tea, oolong tea, black tea or the like to provide green tea, oolong tea, black tea or the like. It is also possible to do so.

Further, in the present embodiment, the cartridge 1 is provided with the roasted coffee powder 4, but the roasted coffee powder 4 is
It is also possible to omit the sealing sheet 5 and put the separately prepared roasted coffee powder 4 in the main body 2 to extract the coffee. Further, in this case, as in the cartridge 1A shown in FIGS. 4 and 5, instead of the accommodating portion 3 of the main body portion 2 in the above-described embodiment, it is deeper than the accommodating portion 3 for positioning the cartridge 1 with respect to the coffee cup. The position regulating portion 15 whose depth is set to be shallow is recessed in the central portion of the bottom wall portion 7, or the housing portion 3 is completely omitted, and the extraction port 11 is formed directly in the central portion of the bottom wall portion 7. It will be.

The cartridge 1 is provided on the market by being wrapped with a barrier film or the like having a gas barrier property in order to retain the flavor of coffee. If multiple packages are packed and cannot be used up in a short period of time, the flavor will be lost if left unchecked.For storage of the remaining items, consider using cans, glass bottles, or barrier film sealed storage bags. Will be required. It is preferable that the packaging form is individually packaged so that no special consideration is required and that it can be easily carried and used outdoors or the like. However, if the cartridge 1 is individually packaged by pillow packaging or the like, the main body 2 for storing hot water becomes bulky, the distribution cost and the selling cost are high, and it is inconvenient to carry and extremely lacking in convenience. In order to solve the above-mentioned problem, the present applicant folds and inverts the side wall portion 6 of the main body portion 2 at an intermediate portion in the height direction, and halves the height of the cartridge 1 to reduce the volume of the packaging form. Invented the following method.

The upper side wall portion or the lower side wall portion of the side wall portion 6 of the main body portion 2 can be folded back at an intermediate portion in the height direction and inverted.
As the base material layer 13, a thermoplastic synthetic resin sheet having a relatively flexible and bendable property such as polyethylene, polypropylene, or those obtained by blending an inorganic filler with these polyolefin synthetic resins is adopted.

Then, as shown in FIG. 6 (a), the cartridge 1 is inverted and mounted on a receiving stand 20 having a substantially cylindrical shape, and a ring-shaped folding jig 21 adapted to the lower half of the cartridge 1 is provided. The cartridge 1 set upside down is covered from the upper side, and while holding the mounting portion 10 of the cartridge 1 by the folding tool 21, the upper half of the cartridge 1 is inverted by pulling up so that the rim portion of the cartridge 1 is expanded to the outside. Then, as shown in FIG. 6B, the side wall portion 6 is folded back until the side wall portion 6 hits the lower end of the folding jig 21, and the height of the cartridge 1 is made about half of that at the time of molding. By packaging, it has become possible to reduce the volume in the packaged state. When the cartridge 1 is used, the lower surface side of the rim portion of the folded cartridge 1 is held by the fingertips of both hands, and the placing portion 10 is pushed down from inside by the thumb so that the main body portion 2 is in the state at the time of molding. It will be restored. However, it is also possible to mechanically fold back and reverse the side wall portion 6 in the same manner as described above.

Further, in order to facilitate smooth folding back of the side wall portion 6, as in the cartridge 1B shown in FIGS. 7 to 9,
An annular step portion 25 is provided in the middle of the side wall portion 6B of the main body portion 2B in the height direction, and the diameter of the upper side wall portion 26 above the annular step portion 25 is set to the lower side wall portion below the annular step portion 25. If the diameter is larger than the diameter of 27, the upper side wall portion 26 can be easily bent through the annular step portion 25. Further, the annular step portion 25 and the upper side wall portion 26 on the folded back side are connected to each other by the annular step portion 25.
If the guide surfaces 28 are arcuate surfaces formed by the curved surface R1 having a radius substantially the same as the width, the upper side wall portion 26 can be folded more easily.

In addition, a vertical rib 29, which is a ridge protruding to the outside in the folded state, is provided on the wall portion on the folding side, that is, the upper side wall portion 26 in the cartridge 1B, over substantially the entire length in the vertical direction as the expansion and contraction direction. The vertical ribs 29 may absorb wrinkles caused by reversing the inner and outer surfaces of the upper side wall 26 by providing them at regular intervals in the circumferential direction.

Further, as in the cartridge 1C shown in FIGS. 10 to 12, an annular step portion 25C is formed in the middle of the side wall portion 6C in the height direction, and the annular wall portion 25C of the side wall portion 6C is formed.
The upper side wall portion 26C is formed on the upper side, the lower side wall portion 27C having a diameter smaller than that of the upper side wall portion 26C is formed on the lower side, and the lower side wall portion 27C is centered around the annular step portion 25C. It is also possible to fold back the cartridge 1C and invert it to fold the cartridge 1C. Further, in this case, the annular step 25
When C and the lower side wall portion 27C to be reversed are smoothly connected to each other by the arcuate guide surface 28C formed by the curved surface R2 having a radius substantially the same as the width of the annular step portion 25C, the lower side wall portion 27C can be folded back more. It will be easier. Further, a protruding wall portion 30 having a low height is formed between the lower side wall portion 27C and the mounting portion 10 so as to protrude upward from the outer peripheral portion of the mounting portion 10, and the protruding wall portion 30 and the mounting portion 10 are formed. The rib portions 31 having a triangular cross section may be formed in the circumferential direction 10 at regular intervals. In this case, when the cartridge 1C is switched to the use state, the adjacent rib portions 31 are left in a substantially right-angled state, and the corner portion 32 is formed on the outer edge portion of the mounting portion 10, and the mounting portion 10 is mounted. Since the part 10 is flat, the cartridge 1C
Can be placed on a coffee cup or the like with good stability.

Next, a method of manufacturing the drip cartridge 1 will be described. The drip cartridge 1 shown in FIG. 1 includes a thermoplastic synthetic resin sheet 50 such as polypropylene or polyester in which a hole 51 to be the extraction port 11 is provided in advance, and a non-woven fabric sheet 52 having a function as a filter and having moldability. It is manufactured by forming a material sheet 54 laminated with and.

First, as shown in FIG. 13, a hole 51 which becomes the extraction port 11 of the cartridge 1 is formed in the strip-shaped thermoplastic synthetic resin sheet 50 in the mold arrangement of the molding die 61 of the molding apparatus 60 shown in FIG. Correspondingly formed in a matrix, small holes 53 for position detection at the time of molding are formed on the side portion of the thermoplastic synthetic resin sheet 50 at a rate of one for each shot. However, it is also possible to configure one extraction port 11 with a plurality of holes 51. Also, a small hole 53 for position detection
May be punched integrally with the hole 51, or the small hole 53
Instead of this, a position detection mark may be printed on the resin sheet 50, and the hole 51 may be punched at a predetermined position while aligning with a photoelectric tube or the like.

Next, as shown in FIG. 13 and FIG. 14, a long fiber spunbonded nonwoven fabric or the like made of a thermoplastic synthetic resin material is applied to the thermoplastic synthetic resin sheet 50 having the holes 51 and the small holes 53 formed therein. Non-woven sheet 52 having moldability
Is heat-laminated so as to cover the punched hole 51, and the material sheet 54 is manufactured.

Next, the material sheet 54 is supplied to the molding device 60 so that the non-woven fabric sheet 52 is positioned on the lower side, and the punching hole 51 is positioned so that it is positioned substantially in the center of the bottom surface of the molded cartridge 1. A small hole 53 for detection is detected by a detecting means 62 such as a photoelectric tube, the material sheet 54 is position-adjusted, and the material sheet 54 is heated by a heater 63. Heat press molding.

Next, the hot press-molded material sheet 54 is trimmed by a punching means (not shown) to form a single main body 2
To produce.

Next, after a certain amount of roasted coffee powder 4 is filled in the accommodating portion 3 of the main body portion 2 by a filling device (not shown), it has water permeability so that the opening of the accommodating portion 3 is closed. The sealing sheet 5 made of a non-woven fabric sheet is adhered to the upper surface of the mounting portion 10 by heat sealing or ultrasonic sealing to obtain the cartridge 1.

In this manufacturing method, the extraction port 11 is integrally molded with a filter function by molding the material sheet 54 prepared in advance, so that the extraction port 11 can be punched in a separate process, It is not necessary to perform the adhesive processing of the filter member, the roasted coffee powder 4 filling device is connected to the molding device 60, and the coffee filling process and the sealing sheet 5 adhesion process can be performed in-line, which greatly improves the productivity. It becomes possible to improve.

[0039]

According to the drip cartridge according to the present invention, the main body for storing hot water and the filter member for the extraction port can be integrally formed, so that a hole for extraction is formed on the bottom surface or the filter member is bonded in a separate process. You do n’t have to
Since it can be manufactured at low cost, it can be provided at low cost as a disposable specification. In addition, since other equipment such as another molded container is not required, it can be easily carried outdoors and is highly convenient.

If the upper side wall or the lower side wall of the side wall of the cartridge is folded back at an intermediate part in the height direction and inverted, and the lower side wall is arranged inside the upper side wall to set the total height to a low level, the individual package is formed. The volume at that time can be halved, and the cost at the distribution stage can be greatly suppressed. In addition, it is convenient because it is not bulky and can be carried outdoors.

If an annular step is formed in the middle of the side wall of the cartridge in the height direction and the annular step and the upper side wall are smoothly connected in an arcuate surface, the annular step and the upper side wall will be separated. The connected portion is easily bent, the side wall portion is easily folded back, and workability can be improved.

When vertical ribs extending in the expansion / contraction direction are formed at intervals in the circumferential direction on the upper side wall or the lower side wall to be inverted, some elasticity is generated in the circumferential direction, and the inner surface of the side wall having a small circumference is It is possible to effectively eliminate wrinkles caused by the outer surface of the side wall portion having a large circumference. Also,
Since the wall is flexible, it can be easily operated even when the inverted wall is returned to its original position.

According to the method for manufacturing the drip cartridge of the present invention, the main body for storing hot water and the extraction port having the filter function can be integrally formed at the same time, so that the hole to be the extraction port can be removed in the post-processing, A drip cartridge with a filter can be manufactured at low cost without the need to bond a filter member. Also, from the state of the material sheet,
Since it is possible to consistently manufacture even containers with a filter function, if you use an automatic filling and sealing machine with a general molding device, it is possible to perform in-line consistent processing up to the final product and improve productivity.

[Brief description of drawings]

FIG. 1 is a perspective view of a drip cartridge.

FIG. 2 is a vertical sectional view of the drip cartridge.

FIG. 3 is a plan view of the main body of the drip cartridge.

FIG. 4 is a perspective view of a drip filter having another configuration.

FIG. 5 is a vertical sectional view of the drip filter.

6 (a) and 6 (b) are explanatory views of a method of folding the cartridge.

FIG. 7 is a perspective view of a drip cartridge having another configuration.

FIG. 8 is a vertical sectional view of the drip cartridge in use.

FIG. 9 is a longitudinal sectional view of the drip cartridge in a folded state.

FIG. 10 is a vertical cross-sectional view of a drip cartridge having another configuration in which the roasted coffee powder and the sealing sheet are removed from the usage state.

FIG. 11 is a longitudinal sectional view of the drip cartridge in a folded state with the roasted coffee powder and the sealing sheet removed.

FIG. 12 is a plan view of the drip cartridge with roasted coffee powder and a sealing sheet removed.

FIG. 13 is an explanatory diagram of a method for manufacturing a material sheet.

FIG. 14 is a vertical sectional view of a material sheet.

FIG. 15 is a schematic explanatory diagram of a manufacturing apparatus.

[Explanation of symbols]

1 drip cartridge 2 Body 3 Storage 4 Roasted coffee powder 5 Sealing sheet 6 Side wall 7 Bottom wall 9 Flange part 10 Mounting part 11 Extraction port 12 Filter 13 Base Material Layer 14 Nonwoven Fabric Layer 1A Cartridge 15 Position restriction unit 20 Cradle 21 Folding jig 1B cartridge 2B body 6B Side wall 25 Annular step 26 Upper side wall 27 Lower side wall 28 Guide surface 29 Vertical rib 1C cartridge 6C side wall 25C annular step 26C upper side wall 27C Lower side wall 28C Guide surface 30 protruding wall part 31 rib part 32 corner 50 thermoplastic synthetic resin sheet 51 punched hole 52 non-woven sheet 53 Small hole 54 Material sheet 60 molding device 61 molding die 62 detection means 63 heater

Claims (6)

[Claims] 1. A cartridge-shaped base material layer formed of a thermoplastic synthetic resin material and having an extraction opening formed on the bottom surface, and an outer surface or an inner surface of the base material layer laminated so as to cover the extraction opening. A non-woven fabric layer made of a thermoplastic synthetic resin material that constitutes a filter in 1., and a drip cartridge. 2. A storage part is provided in the center of the bottom surface of the cartridge, and the storage part is filled with roasted coffee powder,
The drip cartridge according to claim 1, wherein a sealing sheet made of a non-woven fabric having water permeability is stuck on the bottom surface of the cartridge to seal the roasted coffee powder in the housing. 3. The cartridge is made of a flexible and bendable thermoplastic synthetic resin sheet, and the upper side wall or the lower side wall is turned upside down at an intermediate portion in the height direction to turn over the upper side wall. 3. The drip cartridge according to claim 1, wherein the lower wall portion is arranged inside the portion to set the total height to be low. 4. An annular step portion is formed at an intermediate portion in the height direction of a side wall portion of the cartridge, and the annular step portion and the wall portion to be inverted are smoothly connected in an arc surface, and the annular step portion is centered. The total height is set low by folding back and inverting the upper side wall or the lower side wall and arranging the lower side wall inside the upper side wall.
Or the drip cartridge described in 2. 5. The drip cartridge according to claim 3, wherein vertical ribs extending in the expansion / contraction direction are formed in the upper wall portion or the lower wall portion to be inverted at intervals in the circumferential direction. 6. A non-woven fabric sheet having a filter function, which is made of a thermoplastic synthetic resin material, is laminated on at least one surface of a thermoplastic synthetic resin sheet that has been preliminarily punched, and the laminated material sheet is used. A method for manufacturing a drip cartridge, wherein a sheet is formed into a cartridge shape so that the punched hole serves as an extraction port.