JP2018158050A - Filtering tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a filtering tool excellent in shape stability and self-standing property, and suitable for throwing-away and disposal.SOLUTION: In a filtering tool 1 including a bag body 5 in which a bottom surface part 3 and a lateral surface part 4 are formed and a top edge is opened, by using a mesh-like texture or by a sheet material 2 formed of the texture, a reinforcement part 6 formed by fusing a superposed part of each sheet material 2 in a horizontal direction or in a height direction is formed on at least either of the bottom surface part 3 and the lateral surface part 4, to thereby enable self-supporting of the bag body 5.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a filtering tool.

The tea leaves are soaked in the hot water even when the amount of hot water is small so that there is no gap between the inner bottom of the teapot and the bottom of the tea strainer, as in the tea strainer that is hooked into the opening of the teapot. A tea strainer intended to be performed sufficiently is known (for example, Patent Document 1 below).
The tea strainer described in Patent Document 1 has a ring-shaped member head smaller than the opening of the teapot, and a tea strainer composed of a frustoconical strainer made of nylon and further extends a leg extending from the ring-shaped member. Have. The following patent documents disclose the tea strainer as being able to stand on the bottom of the teapot.

JP 2013-230168 A

Conventional tea strainers try to be self-supporting with a synthetic resin ring attached to the opening and synthetic resin legs extending from two locations on the diameter of the ring. It is difficult to make the tea strainer independent and to maintain the truncated cone shape, and the stability is poor. In addition, since the above tea strainer must use an adhesive or the like to attach a three-dimensional nylon bag to the synthetic resin ring and legs, the manufacturing process becomes complicated and material costs increase, resulting in high costs. Not suitable for disposable use.
Even if it can be installed in the teapot, after pouring tea leaves into it, the shape of the tea strainer easily collapses in the teapot due to the weight of the tea leaves containing hot water or moisture, making it difficult to stand on its own. There was a problem.
Therefore, the present invention provides a filter having good shape stability and self-supporting property, and suitable for disposable and disposal processing.

The filtering tool of the present invention includes a bag body having a bottom surface portion and a side surface portion and having an open upper end using a sheet material formed of a mesh-like woven fabric or knitted fabric, and at least one of the bottom surface portion and the side surface portion. On the other hand, a reinforcing portion formed by fusing the overlapping portions of the sheet materials in the horizontal direction or the height direction can be formed, and the bag body can be made self-supporting.
According to this structure, a bag body can be made independent only with a sheet | seat material.

For the sheet material of the filter of the present invention, synthetic fibers having heat-fusibility are used and the longitudinal and lateral shear rigidity of the sheet material by KES method is 6.0 or more and 20.0 gf / cm · deg. It may be the following.
According to this configuration, the bag body is surely self-supporting due to the rigidity of the sheet material itself.

At least a part of the entangled portion of the sheet material of the filter of the present invention may be heat-sealed.
According to this configuration, the bag body is surely self-supporting due to the rigidity of the sheet material itself.

The side part of the filter of the present invention is formed by at least a front sheet and a rear sheet that are arranged to face each other, and the bottom part is sandwiched between the front sheet and the rear sheet in a folded state. The reinforcing portion may be formed by heat-sealing edges of the front sheet, the rear sheet, and the lower sheet that are overlapped with each other.
According to this structure, manufacture of a bag body becomes easy.

The upper end of the side part of the filter of the present invention may be folded inward or outward.
According to this configuration, rigidity can be imparted to the opening at the upper end of the bag.

The said reinforcement part of the filter of this invention may be formed discontinuously at intervals.
According to this structure, the location which suppressed the tension | tensile_strength of the reinforcement part can be made.

A tab or a handle may be provided at the upper end of the side part of the filter of the present invention.
According to this configuration, the filter can be easily taken out.

The tab of the filter of the present invention may be formed by a part of a sheet material that forms the side surface portion.
According to this configuration, the tab configuration is simplified.

  The filter of this invention has the effect that shape stability and independence are good, and it is suitable for disposable.

It is a front view of the filter which is one embodiment of the present invention. It is a perspective view of the filter which is one embodiment of the present invention. It is a figure which shows the preparation process of the filter which is one Embodiment of this invention. It is a figure which shows the preparation process of the filter which is one Embodiment of this invention. It is a figure which shows the preparation process of the filter which is one Embodiment of this invention. It is a perspective view which shows the modification of the filter which is one Embodiment of this invention. It is a front view which shows the modification of the filter which is one Embodiment of this invention. It is a front view which shows the modification of the filter which is one Embodiment of this invention. It is a front view which shows the modification of the filter which is one Embodiment of this invention.

Hereinafter, embodiments of the filter of the present invention will be described with reference to the drawings.
In each embodiment, the vertical direction or the vertical direction means the height direction in a state where the filter is installed in a container such as a teapot, and the horizontal direction or the horizontal direction means a horizontal direction in the installation state. Means the direction.

As shown in FIG. 1, a sheet material 2 formed of a mesh-like woven fabric or knitted fabric is used for a filter 1 according to an embodiment of the present invention.
The sheet material 2 is preferably selected from a mesh-like woven fabric or knitted fabric formed from thermoplastic water-resistant synthetic fibers, and particularly preferably a mesh-shaped woven fabric formed from thermoplastic water-resistant synthetic monofilament yarns. The thermoplastic water-resistant synthetic fiber or monofilament yarn is preferably, for example, a polyester-based, polyamide-based or polylactic acid-based fiber. Among these synthetic resins, polyethylene terephthalate (PET) and biodegradable synthetic resins are preferably selected.

  These resins may be single fibers or composite fibers. As the synthetic fiber used in the present invention, two-components having different melting points are used, and a core-sheath type synthetic fiber in which the core-side component has a higher melting point of about 40 degrees or more than the sheath-side component is particularly suitable. Can be used. Specifically, in addition to the core-sheath type composite fiber in which the core part is made of PET having a melting point of about 230 ° C. or more and the sheath part is made of PET having a melting point of less than about 190 ° C., the core part has a melting point of 170 ° C. or more. A core-sheath type synthetic fiber of a combination of polylactic acid and polylactic acid having a sheath having a melting point of about 130 ° C. is preferably used. However, the combination is not limited to the above as long as it is a core-sheath type synthetic fiber that can be used for a mesh-like woven fabric or knitted fabric.

The fineness of the sheet material 2 is not particularly limited, but may be, for example, 20-60 dtex for beverage extraction. The warp density and the weft density may be 60-130 / inch, and preferably 80-120 / inch.
Although there is no restriction | limiting in the adhesion method for forming the bag-shaped body of this invention, It is preferable to use a heat-fusion method, a high frequency fusion method, or an ultrasonic fusion method.

  Sheet material 2 has a shear stiffness (G value) measured by the KES method (KES F2 system) of the “Texture Weighing and Standardization Research Committee” edited by the Japan Textile Machinery Society of 6.0 or more in both the longitudinal and transverse directions. It may be 20.0 gf / cm · deg or less, and more preferably 8.0 or more and 13.0 gf / cm · deg.

  Specifically, in the present invention, the shear stiffness is measured by the KES method. In the present invention, the opposite end portions of the sheet material 2 (200 mm × 200 mm) as the specimen are used as a pair of clamp portions of the KES tester over the entire portion. The one clamp part is moved relative to the other clamp part in parallel within a range where the shear rate is constant (eg, 0.468 degrees / second) and the maximum shear angle is, eg, 4 degrees. A numerical value obtained by expressing the result in gf / cm · deg is a measurement result of shear stiffness by the KES method, and the higher the numerical value, the more the sheet material can be determined to be “hard to be deformed and hard”.

Conventionally, the filter 1 was not intended to be self-supporting due to the characteristics of the sheet material 2 itself, so it was unclear what sheet material 2 was suitable for self-supporting the bag body 5.
Therefore, as a result of repeated research based on the actual feeling of touch and the independence of the produced bag body 5, a sheet material of woven or knitted fabric having a shear stiffness measured by the KES method of 6.0 gf / cm · deg or more. The present invention was found to be self-sustaining.

  Moreover, it is preferable that the sheet | seat material 2 is fuse | fused by the set process (it is also called heat processing) at least one part of the entangled part of a mesh, Preferably more parts. When the mesh entangled portion of the sheet material 2 is fused, not only the sheet material 2 is given rigidity, but also the sheet material 2 can be cut by hand without using a tool such as a scissors. This is because this characteristic can be utilized in the filter 1.

  As shown in FIGS. 1 and 2, the filter 1 includes a bottomed cylindrical bag body 5 having a bottom surface portion 3 and a side surface portion 4 rising from the periphery of the bottom surface portion 3 and having an open upper end. Each of the bottom surface portion 3 and the side surface portion 4 is provided with a reinforcing portion 6 in which the sheet materials 2 are overlapped and fused. The filter 1 is folded flat before use as shown in FIG. 1, and is used with the opening 7 being opened widely as shown in FIG. 2 during use.

In the present embodiment, the bag body 5 is folded between the front sheet 10 and the rear sheet 11 that are arranged to face each other as shown in FIGS. 1 and 2, and the front sheet 10 and the rear sheet 11. It is formed by the lower surface sheet 12 sandwiched in a state.
In the present application, the “front sheet” and the “rear sheet” merely express the relative positional relationship as the configuration of the bag body 5 for convenience, and containers such as teapots and cups, It does not mean the direction to the user.

  As shown in FIG. 1, the dimensional ratio between the length L1 in the horizontal direction and the length L2 in the vertical dimension of the front sheet 10 may be appropriately set according to the shape of the installation target. The length L1 in the horizontal direction of the front sheet 10 is not necessarily limited. For example, when it is installed in a teapot for Japanese tea, the length L2 in the vertical direction may be 1 to 2.5 times. Preferably 1.3 times or more and 2 times or less, more preferably 1.3 times or more and 1.95 times or less.

On the other hand, the filter 1 can be suitably used by being installed in a long and narrow cup or the like. In such a case, the length L1 in the horizontal direction and the length L2 in the vertical direction may be set in consideration of the ratio of the diameter and height of the cup.
The rear sheet 11 has substantially the same shape as the front sheet 10, and the length in the vertical direction is slightly smaller than that of the front sheet 10, and the lateral length L 1 is the same as the lateral length L 1 of the front sheet 10. Is formed. This is because the front sheet 10 and the rear sheet 11 may have the same length L1 in the horizontal direction and the same length L2 in the vertical direction.

  Since the folding width (that is, the length from the lower end edge to the folded top portion T) L3 of the lower surface sheet 12 defines the degree of opening of the filter 1, the lateral width L1 of the front sheet 10 is determined. It is desirably 25% or more and 60% or less, more preferably 25% or more and 50% or less, and further preferably 30% or more and 40% or less.

When the folding width L3 is less than 25% with respect to the lateral length L1, the opening width in the direction perpendicular to the lateral direction with respect to the lateral length L1 is reduced, and the shape of the opening 7 is elongated in the lateral direction. As a result, it may be difficult to add extraction materials such as tea leaves. On the other hand, when the folding width L3 is 60% or more with respect to the lateral length L1, the opening width in the direction orthogonal to the lateral direction L1 becomes larger than the dimension in the lateral direction L1, resulting in poor balance.
When the folding width L3 is about 30% with respect to the lateral length L1, the shape at the time of opening becomes a square or a circular shape obtained by gently curving the square, the extraction raw material can be easily put, and the opened bag 5 Becomes easier to stabilize.

The front sheet 10 and the rear sheet 11 are heat-sealed at the side edge portion 15 with a bottom sheet 12 folded between them. The heat-sealed side edge portion 15 constitutes a longitudinal reinforcing portion 6a that reinforces the rigidity in the longitudinal direction of the bag body 5 and supports the self-standing in the vertical direction.
It is preferable that a crease that facilitates opening of the front sheet 10 and the rear sheet 11 is provided inside the vertical reinforcing portion 6a.
The front sheet 10 and the lower sheet 12 and the rear sheet 11 and the lower sheet 12 are heat-sealed at the lower end edges 16 of the front sheet 10 and the rear sheet 11. The heat-sealed lower end edge portion 16 constitutes a lateral reinforcing portion 6b that supports the opening of the bag body 5 in a substantially horizontal plane direction.

  Although the width | variety of the vertical reinforcement part 6a and the horizontal reinforcement part 6b is not specifically limited, It is preferable that they are 0.5 mm or more and 10 mm or less, and it is more preferable that they are 3 mm or more and 7 mm or less. If both the reinforcement parts 6a and 6b have such a width | variety, the self-supporting of the filter 1 can be reinforced suitably.

The upper end edge 17a of the front sheet 10 and the upper end edge 17b of the rear sheet 11 are each folded inwardly. The upper end edges 17a and 17b folded twice may be heat-sealed with a certain width from the upper edge as shown in FIG. In this case, the heat-sealed portions of the upper edge portions 17a and 17b constitute a reinforcing portion 6c in the same manner as the vertical reinforcing portion 6a or the horizontal reinforcing portion 6b.
The bending width of the upper edge portions 17a and 17b of the front sheet 10 and the rear sheet 11 is not particularly limited, but may be 1 mm or more and 20 mm or less, and more preferably 3 mm or more and 15 mm or less. Further, the folding may be triple or more.

Next, a method for manufacturing tea strainers will be described.
As shown in FIG. 3, the filter 1 is a sheet portion positioned on both outer sides by folding a single belt-like sheet material 2 into an M shape (or inverted M shape) when viewed from the side as shown in FIG. 4. Are the front sheet 10 and the rear sheet 11, and the sheet that is folded and positioned inside is adjusted to be the lower sheet 12. Both end portions in the longitudinal direction of the belt-shaped sheet material 2 (that is, portions corresponding to 17a and 17b) are folded in a double or triple with a width of 3 mm to 15 mm.

  Then, it is folded into an M shape as shown in FIG. 4, and two locations that become the lower edge 16 as shown in FIGS. 4 and 5 are heat-sealed with a width of 2 mm to 3 mm, respectively. Both ends in the longitudinal direction of the belt-like sheet material 2 folded in double or triple may be heat-sealed. Thereafter, the entire side edges 15, 15 of the front sheet 10 and the rear sheet 11 are heat-sealed including the lower sheet 12 sandwiched between them, and the filter 1 shown in FIG. 1 is completed.

Next, the usage method, operation, function and effect of the filter 1 will be described.
The filter 1 folded flat as shown in FIG. 1 has the opening 7 widened, the front sheet 10 and the rear sheet 11 as side parts 4 as shown in FIG. 2, and the folded lower sheet 12 expanded. It can be used by setting it as the bottom face part 3.

  The opened filter 1 has a front sheet 10, a rear sheet 11, and a lower sheet 12 formed of a sheet material 2 having high shear rigidity and has high tension or stiffness, and has a side edge 15 and a lower edge. Since the reinforcing portions 6a and 6b are formed in the portion 16, the tension is maintained in the vertical and radial directions.

  Therefore, the filter 1 has an effect that it can be self-supported only by the sheet material 2 by opening. Moreover, even if the filtering tool 1 accommodates extraction raw materials, such as a tea leaf, in the inside of the bag body 5 and installs it in the inside of a teapot etc., and pours hot water, the bag body 5 will collapse easily or fall down. It is difficult to obtain an effect that the extracted raw material can be easily taken out and discarded after use.

Moreover, since the reinforcement part 6 of the filter 1 can be formed by heat-sealing between the sheet materials 2, as in a conventional tea strainer, the nylon resin and the synthetic resin member that becomes the frame are fixed. The use of an adhesive can be avoided.
Therefore, the filter 1 has an effect that it can be suitably manufactured as an extremely simple and suitable food and drink product.

  Further, the bottom surface portion 3 is fused with both side edge portions 15 and 15 being sandwiched between the front sheet 10 and the rear sheet 11 in a state where the bottom sheet 12 is folded in a mountain. Therefore, when the bag body 5 is opened and the lower surface sheet 12 is spread in a direction substantially perpendicular to the fold of the top portion T shown in FIG. 1, the lower surface sheet 12 is sandwiched between the front sheet 10 and the rear sheet 11. Inclined surfaces 20 and 20 descending from the edge portions 15 and 15 and a lowermost portion 21 extending in a band shape in a direction substantially orthogonal to the fold line are formed between the inclined surfaces 20 and 20. Specifically, the lowermost portion 21 has a shape such that the apexes of the triangles that broaden toward the lower end edge 16 of the front sheet 10 or the lower end edge 16 of the rear sheet 11 face each other.

The lower surface sheet 12 in this state is in a state where the substantially central portion of the top (that is, the fold) T is recessed against the folds of the mountain fold, and is formed in a valley shape extending in a direction substantially orthogonal to the top T to project the tension.
Accordingly, the bag body 5 is in a state where the lateral reinforcing portion 6b of the lower end edge portion 16 and the tension are extended in a direction substantially perpendicular to the lateral reinforcing portion 6b, so that the opening 7 can be held in an open state as much as possible. Play.
Further, since the upper edge portions 17a and 17b are folded in a double manner, the upper edge portions 17a and 17b are also provided with rigidity.

Moreover, since the front sheet 10 and the rear sheet 11 of the filter 1 have high shear rigidity, the front sheet 10 and / or the rear sheet 11 can be easily cut by hand.
Therefore, since the filter 1 can be used by easily cutting the upper end of the bag body 5 by hand and easily adjusting the height of the bag body 5, it can be easily adapted to containers of various sizes. There is an effect that adjustment is extremely easy.

  For the same reason, the sheet material 2 can be easily creased with a fingertip. Therefore, it is easy to open the opening 7 of the bag body 5 in a polygonal shape, and as a result, an effect is obtained that the three-dimensional shape with the bag body 5 opened is very easily maintained and can be stably made independent.

  Moreover, although the sheet | seat material 2 has the tension | tensile_strength or firmness which can maintain the shape and independence of the bag body 5, since it is a mesh-like textile fabric or knitted fabric, its flexibility is high. Therefore, the filter 1 is attached with a conventional synthetic resin member that is extremely difficult to adjust when the ring-shaped head is larger than the opening of the teapot or the length of the leg is significantly longer than the height of the teapot. Compared with tea strainers, it has the effect of being overwhelmingly more compatible with containers of various sizes.

  Moreover, since the filter 1 can be independent without attaching a member such as a synthetic resin to the bag body 5, the material cost can be reduced, and the manufacturing cost can be reduced because the manufacturing is simple. That is, the filter 1 is suitable for disposable because the manufacturing cost can be suppressed, and the effect that the disposal process is extremely easy can be obtained.

  Moreover, since the filter 1 does not require a conventional ring-shaped synthetic resin or the like for maintaining the open state, it can be folded before use, and is convenient for storage without being bulky. There is an effect.

Next, the modification which can be selected about the structure of each part of the filter 1 of the said embodiment is demonstrated.
In the said embodiment, the horizontal reinforcement part 6b of the filter 1 is provided continuously between the both-side edge parts 15 and 15. FIG. However, as shown in FIG. 6, the lateral reinforcing portion 6b is discontinuous with a gap at a position where a crease is to be formed when the bag body 5 is opened, that is, at a position where it can become a corner or bend when opened. It may be formed automatically. By forming the lateral reinforcing portion 6b in this way, it is possible to obtain an effect that it can be easily bent while suppressing the tension in the lateral direction at the portion to be curved.
Moreover, when the bag body 5 is opened so that the bag body 5 can be opened in a polygonal shape, for example, the lateral reinforcing portion 6b of the filter 1 may be formed only on some opposing sides.

2 may be slightly inclined toward the center of the front sheet 10 or the rear sheet 11 in the width direction. With such a configuration, the filter 1 can be opened in a slightly tapered shape, and the opening 7 can be easily widened.
Further, the vertical reinforcing portion 6a does not necessarily have to be formed continuously, and may be provided discontinuously with an interval that does not cause the extraction raw material to leak.

In addition, at least one of a string, a rod, a band-shaped handle, and a strip-shaped tag may be attached to the upper end portion of the filter 1.
As shown by the phantom line in FIG. 7, the string, bar, or band-shaped handle 25 has a gap between the ends of the string, bar, or band-shaped member formed of heat-sealable synthetic fibers and the upper end of the filter 1. It is good to be constructed so as to be attached with a gap and form an arch shape.

The string, bar or band-shaped handle 25 may be formed of a cotton material or other natural or synthetic fiber. The string, rod or band-shaped handle 25 is formed in a rod shape with a rigid polyolefin-based material, is attached on or parallel to the vertical reinforcing portion 6a, and protrudes from the upper end of the filter 1. It may be provided as follows.
By providing such a string, bar, or belt-like handle 25 on the bag body 5, the effect that the filter 25 can be easily taken out by holding the handle 25 after use of the filter 1 is obtained.

When the tag is provided on the bag body 5, as shown in FIG. 8, a paper piece or a sheet piece made of woven fabric having rigidity equal to or higher than that of the front sheet 10 can be used.
The tag 26 may have any shape, but it is preferable to provide one or more folds 27 at an intermediate portion (a center portion in the drawing) in a direction along the upper edge portions 17a and 17b.

  Such a tag 26 is fixed along the upper edge 17a and / or the upper edge 17b. The end of the tag 26 may protrude from the upper end edges 17a and 17b of the bag body 5 or may not protrude.

When the tag 26 as described above is provided on the bag body 5, the upper end of the bag body 5 can be further reinforced, the fold formation position in the bag body 5 can be easily understood, and the fold line can be easily formed. There is an effect that can be.
Moreover, in the said embodiment, although the upper end edge parts 17a and 17b of the bag body 5 were bend | folded inside, and it was set as the double structure, an upper end part may be Z-folded to make a triple structure, or upper end edge part 17a, 17b may be bent outward.
Alternatively, the upper edge 17a, 17b may be provided with a ridge 28 made of a polyolefin material or the like having rigidity higher than that of the front sheet 10 or the rear sheet 11 so that the opening of the bag body 5 can be assisted.

Alternatively, the upper end edges 17a and 17b of the bag body 5 are not folded but are single-layered or double-layered or more, as shown in FIG. 9, the front sheet 10 and / or the rear sheet 11 extend upward. A tag portion 26a formed in this manner may be provided.
Although the shape of the tag portion 26a extending above the reinforcing portion 6 is not shown, it may be a shape in which the front sheet 10 or the rear sheet 11 extends upward as it is, or the front surface as shown in FIG. The sheet 10 or the rear sheet 11 may have a narrower rectangle, other polygons, a semicircular shape, a semielliptical shape, or the like.

  In addition, when the upper edge portions 17a and 17b are double or more, the entire portion that is double or more may be integrated by heat fusion. When the upper edge portions 17a and 17b are integrated by heat-sealing, the folded sheet material 2 is not separated at any position of the upper edge portions 17a and 17b, and the end portion after being cut is not separated. Can be integrated together.

  When the upper end edge portions 17a and 17b of the bag body 5 are extended to form the tag portion 26a, for example, when the container such as a teapot is covered, the tag portion 26a can be curved and placed in the teapot. Moreover, when the lid of the teapot is opened, the tag portion 26a is elastically restored and protrudes from the opening portion 7 of the teapot, so that the filter device 1 can be easily taken out from the container by pinching the tag portion 26a. Play.

  Furthermore, the front sheet 10 and the rear sheet 11 of the filter tool 1 have a shearing property capable of fusing the entangled portions of the woven fabric or the knitted fabric by a set process and easily cutting the front sheet 10 and / or the rear sheet 11 manually. Is given. Therefore, when the tag portion 26a is too long, the upper end of the tag portion 26a is cut off with an appropriate length, and the length of the tag portion 26a can be easily adjusted and used.

Further, in the present embodiment, the filtering tool 1 is manufactured using one sheet material 2, but the filtering tool 1 is different from the front sheet 10, the rear sheet 11, and the lower sheet 12, respectively or only. It is also possible to produce a plurality of sheet materials 2 formed of sheets by overlapping them and fusing the ends.
Moreover, in the said embodiment, although the lower surface sheet | seat 12 was mountain-folded and it was set as the structure which formed the gusset in the bottom face part 3, the filter 1 is the structure which formed the gusset in the side of the front sheet | seat 10 and the rear sheet | seat 11. There may be.
Even with such a configuration, it is possible to obtain the same effects as those of the above-described embodiment or its modification.

  Next, examples of the present invention will be described. However, the examples do not limit the contents of the present invention.

[Example 1]
The sheet material 2 is a core-sheath type synthetic fiber composed of a high melting point PET having a core part of about 250 ° C.-260 ° C. and a low melting point PET having a sheath part of about 190 ° C.-200 ° C., and a fineness of 28 dtex. A mesh-shaped woven fabric having a warp and weft density of 95 yarns / inch and set with hot air at 195 ° C. was used.
The shear stiffness of the sheet material 2 was measured 10 times using a “KES testing machine” manufactured by Kato Tech Co., Ltd. The average value of 10 times between the maximum value and the minimum value was 8.09 gf / cm · deg in the vertical direction and 8.12 gf / cm · deg in the horizontal direction.

  The bottom surface of the sheet material 2 is 3.5 cm long and 11 cm wide when folded into a mountain fold between a front sheet 10 having a length of 6 cm and a width of 11 cm and a rear sheet 11 having a length of 5.5 cm and a width of 11 cm. The sheet 12 is folded in a side-view M-shape so as to sandwich the sheet 12, and the lower end edge 16 of the front sheet 10 and one lower end of the lower sheet 12, the lower end edge 16 of the rear sheet 11 and the other of the lower sheet 12. The lateral reinforcement 6b was formed by heat-sealing the lower end with a straight line with a width of 3 mm. Further, the side edge portion 15 of the front sheet 10 folded in an M shape and the side edge portion 15 of the rear sheet 11 are heat-sealed with a width of 3 mm across the side edge portion 15 of the lower surface sheet 12, and the longitudinal reinforcement portion 6a.

  The filter tool 1 thus formed was opened, and 2.5 g of green tea leaves were put into the teapot. After the filter 1 was installed in the teapot, it was poured into the teapot, covered, extracted for 2 minutes while rotating the teapot in a horizontal direction 10 times, and green tea was poured into the teacup. The independence of the filter 1 of this embodiment before pouring in the teapot, and the shape of the filter 1 in the teapot, the state of self-supporting, and the state of tea leaf leakage after pouring green tea into the teacup Table 1 below.

  In addition, evaluation of the self-supporting property after extracting the beverage after adding the extraction raw material to the filter 1 has a place where the height of the filter 1 after extraction is less than 80% of the height before extraction. X (no independence) when there is, △ (somewhat difficult to stand by) when there is a part that is 80% or more and less than 85%, ◯ (with independence), 90% or more when it is 85% or more ◎ (excellent independence).

[Comparative example]
A sheet material 2 having the same conditions as in Example 1 was used except that the temperature of set processing was set to 100 ° C.
The shear stiffness of the sheet material of this comparative example was measured 10 times in the same manner as in Example 1 by the KES method. The average value of 10 times between the maximum value and the minimum value was 0.41 gf / cm · deg in the vertical direction and 0.42 gf / cm · deg in the horizontal direction.
Moreover, the filter 1 similar to Example 1 was produced except the point which used the sheet | seat material of this comparative example, and green tea was extracted similarly to Example 1. FIG.
The independence of the filter 1 of this comparative example installed in the teapot before pouring, and the shape of the filter 1 in the teapot after pouring green tea into the teacup, the state of self-supporting, and the state of tea leaf leakage Table 1 below.

[Reference example]
The sheet material 2 under the same conditions was used except that the temperature of the set processing was changed to 160 ° C.
The shear stiffness of the sheet material of this reference example was measured 10 times in the same manner as in Example 1 by the KES method. The average value of 10 times between the maximum value and the minimum value was 2.05 gf / cm · deg in the vertical direction and 1.90 gf / cm · deg in the horizontal direction.
Moreover, the filter 1 similar to Example 1 was produced except the point which used the sheet | seat material of this reference example, and green tea was extracted similarly to Example 1. FIG.
The independence of the filter tool 1 of this reference example installed in the teapot before pouring, and the shape of the filter tool 1 in the teapot after pouring green tea into the teacup, the state of self-supporting and the state of tea leaf leakage Table 1 below.

(Evaluation results)
From Example 1, the shape of the bag 5 can be maintained very well if the shear strength value by the KES method is about 8.05 to 8.15 gf / cm · deg in both the vertical and horizontal directions. It was found that there was no leakage of tea leaves, and the shape and independence were possible even after the beverage was extracted. Therefore, it was easy to perform the second and subsequent extractions.

  From the comparative example, it is difficult to maintain the three-dimensional shape of the bag body 5 in the filter 1 having a shear stiffness value by the KES method of 0.4 to 0.45 gf / cm · deg or less in the vertical and horizontal directions, and is self-supporting. I can't keep up.

  From the reference example, when the shear stiffness value by the KES method is about 1.90 to 2.10 gf / cm · deg in both the longitudinal and lateral directions, the shape may be able to be maintained in the teapot. It turned out that the side part after the extraction was broken, tea leaves leaked slightly during the extraction of the beverage, and the second and subsequent extractions were difficult.

DESCRIPTION OF SYMBOLS 1 ... Filter tool 2 ... Sheet material 3 ... Bottom part 4 ... Side part 5 ... Bag body 6 ... Reinforcement part 10 ... Front sheet 11 ... Rear sheet 12 ... Bottom sheet 25 ... Handles 26, 26a ... Tab

Claims (8)

Using a sheet material formed of mesh-like woven fabric or knitted fabric, a bag body having a bottom surface portion and a side surface portion and having an upper end opened,
At least one of the bottom surface portion and the side surface portion is formed with a reinforcing portion formed by fusing portions where the sheet materials are overlapped in the horizontal direction or the height direction, so that the bag body is self-supporting. Filter tool that can be made.   The synthetic fiber having heat-fusibility is used for the sheet material, and the shear rigidity in the longitudinal and lateral directions of the sheet material by KES method is 6.0 or more and 20.0 gf / cm · deg or less. The filtering tool as described.   The filter according to claim 1 or 2, wherein at least a part of the entangled portion of the sheet material is heat-sealed. The side surface portion is formed by at least a front sheet and a rear sheet that are disposed to face each other.
The bottom portion is formed by a bottom sheet sandwiched between the front sheet and the rear sheet in a folded state,
The said reinforcement part is a filter tool as described in any one of Claim 1 to 3 formed by heat-seal | fusing the edge part on which the said front sheet | seat, the said back sheet | seat, and the said lower sheet | seat were mutually piled up.   The filter according to any one of claims 1 to 4, wherein an upper end of the side portion is folded inward or outward.   The filter according to any one of claims 1 to 5, wherein the reinforcing portion is formed discontinuously at intervals.   The filter according to any one of claims 1 to 6, wherein a tab or a handle is provided at an upper end of the side part.   The filter according to claim 7, wherein the tab is formed by a part of a sheet material forming the side surface portion.