JP3105756B2 - Coffee bag - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coffee bag. In particular, it relates to a bag that is effective when the residue of coffee particles leaks outside and loses its taste when boiling water is added, or when extraction is likely to be insufficient due to internal air or generated carbon dioxide. is there.

[0002]

2. Description of the Related Art In recent years, drinking methods of filling tea or green tea or the like into paper or nonwoven bags and pouring hot water into the bags have been rapidly increasing. Many methods are disclosed for coffee bags, but there are still many problems compared to the most widely used nel drip method or paper filter method, and they are not as popular as black tea and green tea bags. .

[0003] When coffee powder is used in a tea bag system, paper or nonwoven fabric is used in the same manner as tea or the like, but when hot water is poured, fine powder leaks out, or oils and fats are removed from the surface of the cup. Floating on the ground, to impair the taste and richness.

If a thick filter cloth is used to prevent this, hot water does not easily penetrate into the bag, and the bag often floats on the surface of the cup, during which time the temperature of the hot water drops rapidly. Becomes insufficient. This is because the residual air and the coffee powder in the bag are caused by carbon dioxide gas generated by touching the hot water. Therefore, it is necessary to easily release gas from the bag so that hot water can quickly penetrate into the bag.

[0004] For this reason, according to Japanese Utility Model Laid-Open No. 55-129667, as an effective filter material, a paper, a nonwoven fabric, a woven fabric or the like is used. Pieces / 1
cm ² or less and then, and are stated that air permeability 50~1300 l / min / 100 cm ² "and when using the coffee fine powder sufficient extraction efficiency leakage can be prevented is obtained. This is probably because a small number of relatively large meshes were formed in the filter so that the hot water could quickly penetrate into the inside. In addition, many bags using a nonwoven fabric are disclosed.

[0005]

[0003] Coffee bags are not yet as widely used as tea. That is, the hot water does not permeate into the bag rapidly, and the air and coffee powder remaining inside touch the hot water and the carbon dioxide gas generated is not easily released, so that the bag is lifted up and extraction is insufficient.
Further, the fine particles and oils and fats of the coffee powder leak out to impair the taste and richness. The present invention has been made in view of these problems, and aims to easily release carbon dioxide gas generated when coffee is brewed, thereby obtaining a clear coffee liquid having excellent taste and richness.

[0006]

Means for Solving the Problems The inventors of the present invention have various methods for releasing carbon dioxide gas generated inside a bag when hot water is poured into the bag, for rapidly permeating the hot water into the bag, and for the material of the filter. Studied.

As a result, the fineness of a part of the coffee bag is
If it consists of a filter sheet containing ultra-fine fibers of 0.2 denier or less, and the other part consists of a sheet whose carbon dioxide permeability is more than twice that of the filter sheet,
Because the carbon dioxide gas generated when extracting coffee particles is easily released out of the bag through a highly permeable sheet,
It does not hinder the penetration of hot water into the bag, and the coffee liquid extracted inside the bag passes through the filter sheet containing ultra-fine fibers and exits the bag, so it has excellent taste and richness,
It has been found that a coffee liquid free of coffee particle residues and oils and fats can be obtained.

Further, the present inventors have studied the shape, structure, and the like of the bag that facilitates the release of carbon dioxide gas from the bag, and have reached the present invention.

[0009] In other words, the coffee bag, meltblown
-Polypropylene made with a fineness of 0.2 denier or less
Moiety consisting of emissions and / or nonwoven fabric comprising polyethylene terephthalate microfibers and carbon dioxide gas transmission rate is more than twice the nonwoven fabric containing ultra-fine fibers, polypropylene
/ Polyethylene, polyethylene terephthalate / poly
Propylene and polyethylene terephthalate / low melting point
Selected from the group consisting of ethylene terephthalate,
The coffee bag is composed of at least one core / sheath fiber made of a thermally bonded nonwoven fabric , and is excellent in releasing carbon dioxide gas accumulated inside the coffee bag. In addition, the coffee bag is rectangular ,
One part is a nonwoven fabric with high carbon dioxide gas permeability,
Attach a tag thread to the upper end of the tag, and
It is attached. Or oak the tip if you need the top
Fineness in a coffee bag with a triangular shape and a rectangular bottom
Filter sheet containing ultra-fine fibers of 0.2 denier or less
And the carbon dioxide permeability of the filter sheet
It is composed of a part consisting of a sheet that is twice as large as
At least one part of the triangular part at the top of the bag is carbonated
A sheet with high gas permeability, and a
Attach the tag thread to the end of the
The invention also provides a coffee bag with excellent carbon dioxide emission
Included in. Here, the filter containing ultra-fine fibers
Impervious to the border between the tar sheet and the sheet with high carbon dioxide permeability
A coffee bag provided with a transient sea area is also included in the present invention.
Have been.

Here, the upper part of the bag means the upper part when the coffee bag is immersed in the cup by pinching the tag.

Here, for example, the composition of the core-sheath fiber is as follows.
For example, a core / sheath fiber made of polypropylene / polyethylene
"Wei" means that the core component of the sheath-core fiber is polypropylene.
Is a fiber whose sheath is made of polyethylene.
Which indicates that. Hereinafter, the present invention will be described in detail.

The coffee bag of the present invention is composed of two parts, a filter sheet containing ultrafine fibers having a fineness of 0.2 denier or less (hereinafter referred to as a base sheet) and a sheet having a high carbon dioxide gas permeability. The composition of the base sheet and the sheet having high carbon dioxide permeability may be paper, woven fabric, knitted fabric and nonwoven fabric, and the material may be natural fiber, synthetic fiber or a composite thereof. However, the base sheet must contain ultra-fine fibers with a fineness of about 0.2 denier or less, and polypropylene
Nonwoven fabrics containing ren or / and polyethylene terephthalate ultrafine fibers are preferred. When the coffee particles are extracted from nonwoven fabrics having the same basis weight and containing or not containing ultra-fine fibers, the latter is recognized as having a clear floating of fats and oils on the surface of the coffee, and the taste and richness are significantly impaired. However, when ultrafine fibers having a fineness of 0.2 denier or less are contained, the oil and fat do not float on the surface of the coffee and the taste and body are excellent. It is considered that this is because fats and oils are adsorbed and supplemented by strong capillary action in the ultrafine fiber bundle. The supplementing power of fats and oils increases as the fineness decreases. Therefore, the fineness is preferably
It is 0.1 denier or less, more preferably 0.01 to 0.05 denier.

Next, the portion of the bag other than the base sheet, that is, the portion having a high carbon dioxide gas permeability, needs to have a carbon dioxide gas permeability twice or more that of the base sheet. Here, the carbon dioxide gas permeability refers to the ratio of the amount of carbon dioxide gas permeated when the carbon dioxide gas is permeated under the same conditions.Here, the inventor has set the pressure at room temperature to 0.5 cmH ₂ O, the filtration area 0.5 cm. ^2. The transmission amount for 10 seconds is measured, and the ratio is shown as the ratio to the transmission amount of the base sheet. In addition, the material and
The composition is polypropylene / polyethylene, poly
Ethylene terephthalate / polypropylene and polyethylene
Lenterephthalate / low melting point polyethylene terephthalate
At least one core / sheath selected from the group consisting of
Wei thermal bond nonwoven fabric is preferred.

When the carbon dioxide gas permeability is twice or less, when the hot water is poured into the bag, it takes a long time for the hot water to penetrate into the inside of the bag and for the inside gas to escape and to be replaced by the hot water. Since the temperature of the hot water drops rapidly, the extraction speed, that is, the shape of the coffee is significantly deteriorated. When hot water is poured into a bag, how quickly it penetrates into the inside, and how to degas and replace the inside with hot water is the dominant factor when brewing coffee. Therefore, as a base filter, the fine particles and oils and fats of the coffee do not leak out, and in order to sufficiently exert the functions described above with reference to a filter capable of obtaining a coffee liquid having excellent taste and richness. The sheet having a high carbon dioxide gas permeability needs to have a carbon dioxide gas permeability twice or more that of the base sheet. The carbon dioxide gas permeability of this sheet is preferably as high as possible, but if it is too high, the coarseness of the sheet becomes coarse, so that coffee fines may leak out and spoil the taste.

The base filter and the filter having a high carbon dioxide gas permeability used in the present invention have a substantially uniform structure in the case of paper, woven fabric, knitted fabric or non-woven fabric, and are cited in the prior art. 55-129667
No. of pores of a specific size as described in
It is not intended to promote the penetration of boiling water by containing less than ² cm2, and to provide a part with a uniform composition and high carbon dioxide gas permeability to quickly release the carbon dioxide gas generated inside the bag. It is made to penetrate inside the bag.

Recently, ultrafine fibers such as 0.01 to 0.04 denier have been developed for ultra-fine fibers. With the progress of non-woven fabric manufacturing technology, even when used for coffee extraction, coffee of a quality comparable to that of nel drip can be obtained. And the extraction speed can be made very high.

The ultrafine fibers are produced, for example, by a melt blow method, and the components of the fibers are polypropylene, PET (polyethylene terephthalate), or the like.

The structure of the filter sheet containing ultrafine fibers having a fineness of 0.2 denier or less is not particularly limited. Any of a woven fabric, a knitted fabric, a nonwoven fabric or a composite sheet thereof may be used. Since the fibers are extremely fine, a nonwoven fabric is most preferable in consideration of its processability and filterability.

Since the non-woven fabric made of ultra-fine fibers required for coffee extraction is extremely thin, the strength of the sheet is not sufficient with this non-woven fabric alone. For this reason, the support layer is often used by being laminated with a nonwoven fabric made of 1 to 3 denier fiber.

The fiber structure of the support layer is not particularly limited.
Any of a knitted fabric, a nonwoven fabric, and a composite sheet thereof may be used, but when laminated with a nonwoven fabric containing ultra-fine fibers, a nonwoven fabric is preferable due to its workability. As the support layer having low filtration resistance and excellent mechanical properties, for example, a nonwoven fabric of a composite fiber having a structural property such as a core-sheath type is preferable. Polypropylene / polyethylene having a core- in- sheath structure
Tylene, polyethylene terephthalate / polypropylene
Or polyethylene terephthalate / low melting point polyethylene
Core / sheath fibers and the like made of terephthalate.

[0021] Therefore, as a filter sheet containing microfiber example, the average obtained by the melt-blowing method 0.1
4 to 10 g / m of denier polypropylene fiber weight
² non-woven fabric and 1.75 denier polypropylene / poly
It is a laminated sheet made of a core / sheath type conjugate fiber made of ethylene and having a basis weight of 10 to 20 g / m ^{2 with} a thermally bonded nonwoven fabric.

In addition, 0.05 denier polyethylene teref
And tallates nonwoven laminate of polyethylene terephthalate / polypropylene composite fiber nonwoven fabric sheet or, 0.1
Denier polypropylene nonwoven fabric and polyethylene teref
Laminated sheets and the like with a non-woven fabric of tallate / low melting point polyethylene terephthalate composite fiber can also be used.

As a filter sheet having a carbon dioxide gas permeability twice or more that of the above-mentioned nonwoven fabric containing ultra-fine fibers,
The composite fiber nonwoven fabric used as a support layer of the sheet and having excellent mechanical properties with low filtration resistance is suitable. This nonwoven fabric is also extremely excellent in carbon dioxide gas permeability. Also,
It is preferable in terms of economy from the standpoint of economy to use the support layer alone contained in the nonwoven fabric containing ultrafine fibers as a filter sheet having excellent carbon dioxide gas permeability.

The shape of the coffee bag of the present invention is not particularly limited, and the coffee bag may be of any shape. When coffee is extracted, a large amount of carbon dioxide generated inside the bag is quickly released from the bag, and hot water is discharged. The shape of the bag is rectangular or upper triangular or lower rectangular to promote penetration into the bag, and when the bag is hung with the tag held, the upper part of the bag has excellent carbon dioxide permeability. The structure in which the folded sheets are arranged is preferable.

When brewing coffee using the bag of the present invention, pinch the tag and immerse it in a coffee cup filled with hot water, or suspend the coffee bag and hold it on an empty coffee cup, and put hot water there. In many cases.

The roasted coffee particles are extracted with boiling water and
-When preparing liquid, a large amount of carbon dioxide gas is generated inside the bag.
However, the upper part of the bag has a carbon dioxide
Since that is the bets, carbonated gas is easily discharged from this portion. Without bus <br/> Tsu grayed With bag having such structure is remains floating on the liquid surface, is facilitated penetration of water into the interior of the bag, heat water does not cool In the meantime, the coffee particles are sufficiently brought into contact with the hot water, so that the extraction speed is significantly increased.

In addition, since the coffee liquid produced in the bag is almost filtered through a filter sheet containing ultrafine fibers,
It has a good flavor and richness, and does not contain coffee residue fine particles or oils and fats that hinder coffee flavor.

In the bag of the present invention, a region made of an impermeable sheet can be provided at a boundary between a portion made of a filter sheet containing ultrafine fibers and a portion made of a sheet having high carbon dioxide gas permeability.

In the case of using a coffee bag having such a structure, if the liquid level is kept below the upper end of the area of the impermeable sheet during the extraction of coffee, the generated carbon dioxide gas has an upper carbon dioxide gas permeability. The coffee liquor obtained through the high sheet was completely filtered through only the filter sheet containing the fine fibers.

[0030] Accordingly, there is no residue or oil of coffee particles that inhibits the flavor of the coffee, and it is possible to easily adjust the coffee having an excellent flavor and richness.

[0031]

EXAMPLES The present invention will now be described more specifically with reference to examples.

(Examples 1 to 3, Comparative Example 1) FIGS. 1 and 2
(A) and (b) show a front view and a side view of one embodiment of the coffee bag of the present invention. FIG. 3 shows a front view of one embodiment of the coffee bag of the present invention.

The size of the bag body 1 is 9c in height.
m, width 5.8 cm, and the filter sheets of these bags are made of two types: a filter sheet 2 containing ultra-fine fibers and a sheet 3 having a carbon dioxide gas permeability twice or more that of the sheet 1. Filter sheet 2 containing the ultrafine fibers and the basis weight 4 to 6 g / m ² nonwoven fabric made of the average 0.1 denier polypropylene fibers obtained by melt-blowing method, the composite of the core / sheath type consisting of an average 1.75 denier polypropylene / polyethylene Weight of fiber 15.0g / m ²
A laminated sheet with a thermal bond nonwoven fabric.

The carbon dioxide gas permeability of the sheet is 2%.
As the sheet that is twice or more, the polypropylene /
Only a thermally bonded nonwoven fabric made of a core / sheath type composite fiber made of polyethylene is used alone as it is.

The nonwoven fabric has a carbon dioxide gas permeability of 10.5 times that of the nonwoven fabric laminated sheet containing the ultrafine fibers.

The upper part of the bag shown in FIG. 1 (embodiment 1) is composed of the filter sheet 3 and the lower part is composed of the filter sheet 2, and the material and configuration of the rear view are exactly the same as those of the front view.
The left and right edges 4 of the bag are fused and melted by an ultrasonic fusing machine to form the edge of the bag, and the lower end 5 of the bag is a fold of the sheet.

The bag is filled with 5 g of coffee particles each having the same quality and particle size distribution obtained by roasting and pulverizing coffee beans, and then sealing the upper end 6 of the bag by heat sealing.

Further, a tag thread 7 is provided at the center 8 of the upper end of the bag.
Are fused, and a tag 9 is attached to the tip of the yarn. When using the bag, the user can grasp the tag 9 with his / her finger and immerse the bag in a coffee cup to stir.

In the state where the bag is hung with the tag held, the coffee particles are accumulated to a position of about half the height of the bag, and at the time of extraction, the coffee particles are immersed in hot water to about 2/3 of the bag. , Stirred and extracted.

The bag shown in FIG. 2 (Example 2) is the same as the bag of FIG. 1 except that all the sheets on the back surface are made only of the filter sheet 2 containing ultrafine fibers.

In the bag shown in FIG. 3 (Example 3), a filter sheet 3 having a high carbon dioxide gas permeability is attached in the form of a strip at the upper part of the front view, and the filter sheet containing ultra-fine fibers is all on the back side. It consists of two.

FIG. 4 (Comparative Example 1) shows a conventional bag for comparison, in which both the front and the back of the bag are all made of only the filter sheet 2 containing ultrafine fibers.

The specifications of the tag yarn 7, the tag yarn fusion portion 8 and the tag 9 of these bags are all the same as those of the first embodiment (FIG. 1).
Is the same as

The tag of each of these coffee bags is hung with a finger, and each of them is placed in a coffee cup of the same size containing 150 ml of hot water at 90 ° C. The coffee was immersed (immersed to about 2/3 of the height of the bag), and the coffee was extracted while the upper part was slightly floating from the surface of the hot water and the hot water was stirred in the bag.

When the bag of Comparative Example 1 was immersed in hot water and agitated, the gas inside did not escape easily, and the bag floated on the surface of the hot water and did not easily sink to a predetermined state. The bags of Examples 1 to 3 did not accumulate gas inside, easily sinked to a predetermined position, and extraction of coffee particles was smooth.

When coffee is brewed in this manner,
In addition to Comparative Example 1, other than Examples 1 to 3, hardly any fine particles were mixed in the coffee liquor, and no floating of oil or fat was observed on the liquid surface.

In order to compare the degree of coffee extraction of each bag, the sugar content of the coffee liquid was measured with a Brix sugar meter after extraction for 3 minutes.

As a result, according to the scale of the refractometer,
1.31, Example 2 was 1.30, Example 3 was 1.28, and Comparative Example 1 was 1.00.

As a result, in the bag of the present invention having a sheet having a high carbon dioxide gas permeability, when the coffee is poured, the carbon dioxide gas generated inside easily escapes, does not accumulate in the bag, and the coffee is extracted smoothly. You can see that

(Embodiment 4) FIG. 5 is a front view of another embodiment of the present invention.

In the front view of this bag, the upper part is triangular, the lower part is rectangular, the upper part is made of a sheet 3 having high carbon dioxide gas permeability, and the lower part is made of a filter sheet 2 containing ultrafine fibers. The shape of the back view of these bags is the same as that of the front view, and the material is the same as that of the front view. Figure 1 shows the size of the rectangular part of the bag
Same as the bag.

Here, the filter sheet 2 containing ultra-fine fibers is a nonwoven fabric made of a PET (polyethylene terephthalate) fiber having an average of 0.05 denier obtained by a melt blow method and having a basis weight of 4 to 6 g / m ² , and an average of 2.0 denier. of
Polyethylene terephthalate / polypropylene core / sheath
It is a laminated sheet composed of a type composite fiber and a thermal bond nonwoven fabric having a basis weight of 13 to 18 g / m ² .

The carbon dioxide gas permeability of the sheet was 2%.
The fold or more filter sheet 3, wherein the polyethylene
Thermal bond non-woven fabric consisting of lenterephthalate / polypropylene-core / sheath type composite fiber is used as it is.

The carbon dioxide permeability of this nonwoven fabric is 17.5 times that of the above nonwoven fabric laminated sheet containing ultrafine fibers.

The lower end 5 of the bag is a fold of the sheet, and the bag after filling with the coffee particles is sealed by heat sealing, but the other edges are cut by an ultrasonic cutting machine.
Has been fused.

Further, inside the bag, 6 g of coffee particles each having the same quality and particle size distribution obtained by roasting and grinding coffee beans are enclosed.

Using this bag, coffee was made in the same manner as in Example 1. When the bag was immersed in hot water, the gas did not accumulate inside and the bag easily sank to a predetermined position. Also, almost no fine particles were mixed into the coffee liquid, and no floating of oils and fats was observed on the liquid surface.

The sugar content of the coffee liquor was measured with a Brix saccharimeter.

Embodiments 5 and 6 FIG. 6 shows a front view of another embodiment of the present invention. FIG. 7 is a plan view of another embodiment of the present invention.

The front view of the bag shown in FIG. 6 (Example 5) is circular, and the upper half is made of a sheet 3 having high carbon dioxide gas permeability, and the lower half is made of a filter sheet 2 containing ultrafine fibers. The overall shape of this bag is the shape of a disc used for throwing a disc. Therefore, the shape of the back view of these bags is the same as that of the front view, and the material is also the same as the material of the front view.

The material on the back is all filter sheet 2
It is also possible to adopt a structure having only one.

The plan view of the bag shown in FIG. 7 (Embodiment 6) is circular, and the upper half of the bag has a high carbon dioxide gas permeability.
The lower half of the figure is made of the filter sheet 2 containing ultra-fine fibers. The overall shape of this bag is also a disk shape used for disk throwing as in the fifth embodiment. Therefore, the shape of the bottom view of these bags is the same as the front view. All the materials in the rear view consist only of the filter sheet 2 containing ultra-fine fibers.

The filter sheet 2 containing ultrafine fibers and the sheet 3 having high carbon dioxide gas permeability of these bags include:
In each case, the same material as in Example 4 is used. The filling amount of the coffee particles and the like are the same as in Example 1.

The coffee liquor was prepared in the same manner as in Example 1, and the sugar content of the coffee liquor was measured with a Brix saccharimeter. As a result, Example 5 was 1.31 and Example 6 was 1.30. Leakage of coffee residue particles and oils and fats was hardly observed.

(Embodiments 7 and 8) FIGS. 8 and 9 are front views of another embodiment of the present invention.

The bag shown in FIG. 8 (Embodiment 7) has a triangular protrusion on the upper part and a rectangular part on the lower part. Top three
The square projections are made of a sheet 3 having high carbon dioxide gas permeability,
The lower rectangular part is made of the filter sheet 2 containing ultra-fine fibers. The shape of the back view of these bags is the same as that of the front view, and the material is the same as that of the front view. The size of the rectangular portion of the bag is the same as that of the bag of FIG.

The front view of the bag shown in FIG. 9 (Embodiment 8) is rectangular, and a strip portion on the right side is made of a sheet 3 having high carbon dioxide gas permeability, and the other portion is made of a filter sheet 2 containing ultra-fine fibers. ing. The shape of the rear view of this bag is symmetrical with the front view, and the material is the same as that of the front view.

The material on the back was all filter sheet 2.
It is also possible to adopt a structure having only one.

The same sheet as in Example 1 is used as a material for the filter sheet 2 containing ultrafine fibers and the sheet 3 having a high carbon dioxide gas permeability in these bags.

The coffee liquor was prepared in the same manner as in Example 1, and the sugar content of the coffee liquor was measured with a Brix saccharimeter. As a result, Example 7 was 1.30 and Example 8 was 1.31. Leakage of coffee residue particles and oils and fats was hardly observed.

(Embodiments 9 and 10) FIGS. 10 and 11 are front views of another embodiment of the present invention.

The upper part of the bag shown in FIG. 10 (Embodiment 9) has a triangular projection, and the lower part is rectangular. Top three
The square projections are made of a sheet 3 having high carbon dioxide gas permeability,
The lower rectangular part is made of the filter sheet 2 containing ultra-fine fibers. The shape of the back view of these bags is the same as that of the front view, and the material is the same as that of the front view. The size of the rectangular portion of the bag is the same as that of the bag of FIG.

As the filter sheet 2 containing ultra-fine fibers, a nonwoven fabric having a basis weight of 4 to 6 g / m ² made of polypropylene fibers having an average of 0.1 denier obtained by a melt blow method;
Using the laminated sheet with an average 2.0 denier polyethylene terephthalate / low melting point polyethylene terephthalate sheath-core made of composite fibers having a basis weight 10 to 22 g / m ² of a thermal bond nonwoven fabric, also carbon dioxide gas permeability of said sheet The above-mentioned polyethylene is used as a filter sheet that is twice or more
Lenterephthalate / low melting point polyethylene terephthalate
A thermal bond nonwoven fabric made of a core-sheath type conjugate fiber was used as it was. The carbon dioxide permeability of this sheet is 11.0
It was twice.

In the same manner as in Example 4, the bags shown in FIGS. 10 (Example 9) and 11 (Example 10) were prepared. The top of the triangular shape at the top of the bag made of a sheet with high carbon dioxide permeability is caulked and shaped like a chimney to just remove carbon dioxide.

Note that, between the sheet 1 and the sheet 2, there is provided an impermeable area by calendering a part of the sheet in advance before bag making. If the liquid level is kept below the upper end of this area when brewing coffee, the obtained coffee liquid is obtained only by filtering the whole amount by the sheet 2.

The coffee liquor was prepared in the same manner as in Example 1, and the sugar content of the coffee liquor was measured with a Brix saccharimeter. As a result, Example 8 was 1.31 and Example 9 was 1.30.

In addition, almost no fine particles were mixed in the liquid, and floating of oils and fats was observed on the liquid surface.

[0078]

According to the present invention, while extracting coffee, a large amount of carbon dioxide generated inside the bag is quickly released from the sheet having a high carbon dioxide gas permeability during the extraction of coffee, so that the coffee can be removed while the hot water is not cooled. It can be extracted sufficiently.
In addition, since the extracted coffee liquid is filtered through a filter sheet containing ultra-fine fibers, there is no residue of coffee particles or oils or fats that impair the flavor.

[Brief description of the drawings]

FIG. 1 shows a front view of one embodiment of the bag of the present invention.

FIG. 2 shows a front view of one embodiment of the bag of the present invention.

FIG. 3 shows a front view of one embodiment of the bag of the present invention.

FIG. 4 shows a front view of an example of a conventional coffee bag.

FIG. 5 shows a front view of one embodiment of the bag of the present invention.

FIG. 6 shows a front view of one embodiment of the bag of the present invention.

FIG. 7 shows a plan view of one embodiment of the bag of the present invention.

FIG. 8 shows a front view of one embodiment of the bag of the present invention.

FIG. 9 shows a front view of one embodiment of the bag of the present invention.

FIG. 10 shows a front view of one embodiment of the bag of the present invention.

FIG. 11 shows a front view of one embodiment of the bag of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bag main body 2 Filter sheet containing ultra-fine fiber 3 Sheet with high carbon dioxide gas permeability 4 Edge of both sides of bag 5 Lower end of bag 6 Upper end of bag 7 Tag thread 8 Tag thread fusion part 9 Tag 10 Impermeable sheet

──────────────────────────────────────────────────続 き Continuing from the front page (73) Patent holder 000178882 Yamanaka Sangyo Co., Ltd. 17-17 Hanazono-cho, Hanazono-ku, Kyoto-shi, Kyoto (72) Inventor Masao Yanagida 1-5-1, Marunouchi, Chiyoda-ku, Tokyo Dainippon Within Sugar Manufacturing Co., Ltd. (72) Inventor Akio Tsukada 2-chome, Nishi-Shimbashi, Minato-ku, Tokyo Co., Ltd. Inside Unicafe Co., Ltd. (72) Inventor Hiroshi Tsuji 1-12-39 Umeda, Kita-ku, Osaka-shi, Osaka Co., Ltd. Inside Kuraray (72) Inventor Yoshihiro Yanagishita 1-5-1, Taito, Taito-ku, Tokyo Toppan Printing Co., Ltd. (72) Inventor Kaichi Suzuki 23-14 Uchihata-cho, Hanazono-cho, Ukyo-ku, Kyoto-shi, Kyoto (72) Inventor Motomura Tadashi 22-13 Miyakecho, Kameoka-shi, Kyoto (56) References JP-A-3-212376 (JP, A) JP-A-3-105476 (JP, U) (58) Fields investigated (Int. ⁷ , DB name) A47J 31/06

Claims (4)

(57) [Claims] 1. A coffee bag is formed by melt-blowing.
Polypropylene with a fineness of 0.2 denier or less or
/ And not containing polyethylene terephthalate microfibers
A part made of a woven fabric and having a carbon dioxide permeability of at least twice that of the nonwoven fabric containing the ultrafine fibers, polypropylene / poly
Ethylene, polyethylene terephthalate / polypropylene
And polyethylene terephthalate / low melting point polyethylene
At least selected from the group consisting of terephthalate
A coffee bag that is composed of a single core / sheath fiber made of a thermally bonded nonwoven fabric, and that excels in releasing carbon dioxide gas accumulated inside the coffee bag. 2. A rectangular coffee bag comprising a melt-blown
-Polypropylene made with a fineness of 0.2 denier or less
Moiety consisting of emissions and / or nonwoven fabric comprising polyethylene terephthalate microfibers and carbon dioxide gas transmission rate is more than twice the nonwoven fabric containing ultra-fine fibers, polypropylene
/ Polyethylene, polyethylene terephthalate / poly
Propylene and polyethylene terephthalate / low melting point
Selected from the group consisting of ethylene terephthalate,
At least one part of the upper part of the bag is a nonwoven cloth with high carbon dioxide permeability, and a tag thread is attached to the upper end of the bag, A coffee bag with a tag attached to it that excels in releasing carbon dioxide accumulated inside the coffee bag. 3. A triangular shape with a crimped tip if required.
A coffee bag having a rectangular lower portion is composed of a portion made of a filter sheet containing ultrafine fibers having a fineness of 0.2 denier or less, and a portion made of a sheet having a carbon dioxide gas permeability of twice or more that of the filter sheet. Release of carbon dioxide accumulated inside the coffee bag, wherein at least one of the triangular portions is a sheet having high carbon dioxide gas permeability, and a tag thread is attached to an upper end of the bag and a tag is attached to the tip of the bag. Excellent coffee bag. 4. A part comprising a filter sheet containing ultrafine fibers having a fineness of 0.2 denier or less of a coffee bag;
4. A carbon dioxide gas accumulated inside a coffee bag according to claim 1, wherein a region made of an impermeable sheet is provided at a boundary between a portion made of a sheet having a carbon dioxide gas permeability twice or more that of the filter sheet. Coffee bag with excellent release properties.