JP2009202932A - Filter for extracting luxury beverage, its manufacturing method, and bag for extraction - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a filter for extracting luxury beverage which has excellent moldability and restrains luxury beverage powder from leaking, its manufacturing method, and a bag for extracting the luxury beverage which is made from the filter for extracting the luxury beverage. <P>SOLUTION: The filter having a woven or knitted structure is obtained by using a polyester filament (1) which is formed only from a copolymerized polyester component whose melting point is 160-240°C and whose tensile strength is not less than 3.0 cN/dtex measured according to JIS L1013. After this, the filter is heat-treated under a relaxed condition when necessary, and the bag for extracting the luxury beverage is constituted when necessary. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention is a filter used for the extraction of a favorite beverage such as green tea, black tea, oolong tea, barley tea, jasmine tea, apple tea, soup stock, coffee, cocoa, etc. The present invention relates to a taste-extracting beverage extraction filter that is difficult to leak and a taste-extracting beverage extraction bag that uses the taste-extracting beverage extraction filter.

  Conventionally, as a filter for extracting a favorite beverage used when drinking a favorite beverage such as black tea or green tea, there is a filter composed of a polyolefin fiber such as polypropylene or polyethylene, a nonwoven fabric made of polyester fiber, or paper. It has been mainly used.

  In recent years, there has been an increase in the number of extraction bags made up of palatable beverage extraction filters using a plain weave mesh fabric using monofilaments. Bags for taste-paste beverage extraction using filters made of such mesh fabrics have a high-class feeling because the tea leaves inside the bag can be seen with the trend of herbal tea and flower tea that enjoy the appearance and fragrance, and the fragrance and extractability It has the feature that it is excellent in.

  As the material fiber of the filter for extracting beverages for palatability beverages used for extracting palatability beverages of textiles, it has excellent three-dimensional shape retention and has a good elastic recovery when deformed, and it is soft and textured. Nylon monofilament is most often used because of its superiority.

  However, palatable beverage extraction filters and palatable beverage extraction bags containing nylon monofilament absorb yellowing due to the influence of oxygen in the air, dimensional changes due to hot water during extraction, shape loss, and palatable beverage components. Due to color change due to aging, poor drainage when removing the bag after extraction from the container, poor settling of the extraction bag in hot water due to the low specific gravity of nylon, generation of nitrogen oxides by incineration after use Problems such as environmental pollution have been pointed out for some time.

  For the purpose of improving the problems of such nylon fibers, a taste beverage extraction filter using polyester fibers has been studied. For example, in Patent Document 1 and Patent Document 2, a core having a melting point difference of 100 ° C. or more is used. Taste-free beverage extraction filter and extraction bag made of polyester fiber with double sheath structure, including fabrics where the intersection of warp and weft is not fused, or the intersection of warp and weft is fused There are proposals that include worn fabrics.

  However, when molding a palatable beverage extraction bag using a palatable beverage extraction filter composed of a polyester fiber having a double core / sheath structure, a high melting point component is added to the core of the polyester fiber. Therefore, when molding an extraction bag with ultrasonic sealing or heat sealing, compared to the case of using a filter made of nylon fiber, the moldability is poor, and the output of the ultrasonic vibrator is increased, It is necessary to increase the heater temperature or decrease the molding speed.

  In addition, in the welded part of the molded extraction bag, the sheath part having a low melting point is welded, but the core part has a high melting point and is not sufficiently welded, so that the welding strength is higher than that using nylon fibers. The spread of mesh fabrics using polyester fibers despite the fact that various problems with nylon fibers have been pointed out, including the problem that the beverages are low and easily open and tear easily, and the palatable beverage powder inside the extraction bag leaks. Is struggling.

  On the other hand, in the palatable beverage extraction filter and the extraction bag, there has been a demand for a reduction in the content of metal elements commonly used as a polymerization catalyst in the production stage of polyester fibers.

  A polyester multifilament having a flat cross-sectional shape is disclosed in Patent Document 3. A polyester multifilament made of polyester obtained using a catalyst containing a titanium compound and a phosphorus compound is disclosed in Patent Document 4. Moreover, the tetra-shaped palatable beverage extraction bag is disclosed in Patent Document 5.

Japanese Patent No. 3459951 Japanese Patent No. 3459952 International Publication WO 2004/009889 Pamphlet International Publication WO 2004/063435 Pamphlet JP-A-5-193615

  The present invention has been made in view of the above-mentioned background, and its purpose is to provide a filter for extracting a beverage with a preference and a method for producing the beverage with the preference and a filter for extracting the beverage with a preference, which is excellent in moldability and is less likely to leak a taste beverage powder. It is providing the bag for extracting a palatability drink used.

  As a result of intensive investigations to achieve the above-mentioned problems, the present inventor has found that a polyester-based filament formed solely from a copolymerized polyester component having a melting point of 160 to 240 ° C. is used as a material for extracting a palatable beverage and an extraction bag. Has the same moldability as a conventional nylon fiber, and the weld strength of the sealed portion of the molded extraction bag is higher than that of a conventional core / sheath double-layer polyester fiber. Therefore, the seal portion was not opened, and as a result, it was found that the palatable beverage powder inside the bag was not spilled, and the present invention was completed by further intensive studies.

  Thus, according to the present invention, a “paste beverage extraction filter having a woven or knitted structure, which is formed of a copolymerized polyester component alone having a melting point of 160 to 240 ° C. and measured according to JIS L1013. There is provided a filter for extracting a palatability beverage characterized by including a polyester filament (1) having a tensile strength of 3.0 cN / dtex or more.

In that case, in the said polyester-type filament (1), it is preferable that a boiling water shrinkage rate is 15% or less. The copolymer polyester is preferably polyethylene terephthalate copolymerized with isophthalic acid. The copolymer polyester is preferably polybutylene terephthalate copolymerized with isophthalic acid. The polyester filament (1) is preferably a monofilament having a single fiber fineness of 10 to 60 dtex. The single filament cross-sectional shape of the polyester filament (1) has a flat cross-sectional shape, and the flat cross-section has a length B in the longitudinal centerline direction and a right angle to the longitudinal centerline direction. The cross-sectional flatness represented by the ratio B / C1 to the maximum width C1 in the intersecting direction is preferably in the range of 2-6. At that time, in the flat cross section of the polyester filament (1), two or more constricted portions are formed on one side, and the ratio C1 / C2 of the maximum value C1 of the width to the minimum value C2 is 1. It is preferable to be within the range of 05 to 4.00. Moreover, it is preferable that the said polyester-type filament (1) does not contain a matting agent. In the polyester filament (1), the content of a metal element having a true specific gravity of 5.0 g / cm ³ or more is preferably 0.5 ppm by weight or less.

  In the palatable beverage extraction filter of the present invention, it is preferable that the palatable beverage extraction filter is composed only of the polyester filament (1). In addition, it is preferable that the palatable beverage extraction filter has a woven fabric structure, has a warp density of 30 to 300 / 2.54 cm, and a weft density of 30 to 300 / 2.54 cm. Moreover, it is preferable that the filter for palatable beverage extraction has a plain fabric structure. The palatable beverage extraction filter preferably has a mesh knitted fabric. Moreover, it is preferable that the aperture ratio of the filter for extracting a palatable beverage is in the range of 40 to 75%. Moreover, in the palatable beverage extraction filter, it is preferable that at least a part of the intersecting portion of the filaments constituting the filter is fused. Moreover, it is preferable that the crossing part of the filament is fused in a lattice pattern.

  Further, according to the present invention, “using a polyester filament (1) having a tensile strength measured by JIS L1013 of 3.0 cN / dtex or more, which is formed of a copolymer polyester component having a melting point of 160 to 240 ° C. alone. There is provided a method for producing a filter for extracting a palatability drink as described above, characterized by weaving or knitting a woven or knitted fabric.

  At that time, the boiling water shrinkage of the polyester filament (1) is preferably 15% or less. Moreover, it is preferable to heat-set the woven or knitted fabric after the woven or knitted fabric is woven or knitted.

  ADVANTAGE OF THE INVENTION According to this invention, the palatability drink extraction bag which uses the filter for palatability drink extraction which is excellent in a moldability and is hard to leak palatability drink powder, and this palatability drink extraction filter is obtained.

Hereinafter, embodiments of the present invention will be described in detail.
The filter for extracting a palatability beverage of the present invention is a filter for extracting a palatability beverage having a woven fabric or a knitted fabric, and has a copolymer polyester component having a melting point of 160 to 240 ° C (preferably 180 to 220 ° C). A polyester filament (1) that is formed alone and has a tensile strength measured by JIS L1013 of 3.0 cN / dtex or more (preferably 3.5 to 6.0 cN / dtex) is included. By forming a palatable beverage extraction filter with a polyester filament (1) composed of a copolymerized polyester component having such a melting point, the filaments are fused when an extraction bag is molded from the palatable beverage extraction filter. Becomes easy. Here, when the melting point is lower than 160 ° C., when the filaments are fused as described later, they can be easily fused, but the fiber strength of the filaments is lowered, and the yarn-making property is deteriorated. In addition, there is a possibility that the process passability of the weaving or knitting process may deteriorate. On the other hand, if the melting point is higher than 240 ° C., the fusing property is deteriorated and sufficient adhesive strength may not be obtained, and the processing speed when molding the extraction bag to improve the adhesiveness is reduced. , Productivity may be worse. In addition, when the tensile strength is less than 3.0 cN / dtex, problems such as yarn breakage and fluff may occur in the weaving or knitting process or the preparation process thereof, or the completed extraction filter or molded extraction may be performed. This is not preferable because the strength of the bag for use becomes weak and a problem in production or use may occur.

  The copolymerized polyester component is produced from a dicarboxylic acid component and a diol component. It is preferable that terephthalic acid is mainly used as the dicarboxylic acid component, and it is preferable to use one or more alkylene glycols selected from ethylene glycol, trimethylene glycol, and tetramethylene glycol as the diol component. The third component contained in the polyester polymer comprising the dicarboxylic acid component and the diol component includes dicarboxylic acids other than terephthalic acid, such as isophthalic acid, naphthalenedicarboxylic acid, adipic acid, sebacic acid; and other than alkylene glycol One or more glycol compounds such as diethylene glycol, polyethylene glycol, bisphenol A, and bisphenol sulfone can be used. Among them, a copolymer polyester (that is, isophthalic acid) in which the acid component is composed of terephthalic acid and isophthalic acid having a molar ratio (terephthalic acid / isophthalic acid) of 95/5 to 75/25 and the diol component is composed of ethylene glycol or tetramethylene glycol. Polyethylene terephthalate copolymerized with poly (ethylene terephthalate) or polybutylene terephthalate copolymerized with isophthalic acid).

  Further, it is important that the polyester filament (1) is formed of the copolymer polyester component alone. Here, if the filament is a core-sheath type or side-by-side type composite fiber composed of two or more components, an extraction bag is molded by ultrasonic sealing or heat sealing using a filter for extracting beverages of preference. In comparison with the case of using a filter composed of a polyester filament (1) formed by a copolymerized polyester component alone, the moldability is poor, the output of the ultrasonic vibrator is increased, and the heater temperature is increased. It is necessary to reduce the molding speed, which is not preferable.

  The polyester filament (1) is preferably a monofilament. When the filter is composed of monofilaments, a high-quality feeling can be obtained in the finally obtained bag because the tea leaves inside the bag can be seen. At that time, the monofilament fineness of the monofilament is preferably in the range of 10 to 60 dtex (more preferably 10 to 40 dtex, still more preferably 20 to 35 dtex). When the fineness is larger than 60 dtex, the filter is thick and the soft texture may be impaired. On the other hand, if the fineness is less than 10 dtex, sufficient filament strength may not be obtained. Furthermore, if the weaving or knitting density of the filter is not significantly increased, the palatable beverage powder may easily leak, and if the density is increased, the difficulty of weaving or knitting increases and the cost may increase.

  Moreover, in the said polyester-type filament (1), it is preferable that a single fiber cross-sectional shape is a flat cross-sectional shape. By including a polyester-based filament having a flat cross-sectional shape to which the palatable beverage extraction filter of the present invention is applied, compared to a filter including a filament having no flat shape such as a round cross-section and a triangular cross-section of the same fineness, a flat cross-section As a result, the aperture ratio can be reduced without increasing the density of the filter. As a result, a filter for extracting a palatability beverage having a soft texture and preventing the palatability beverage powder from leaking is obtained.

  At that time, in the polyester-based filament having the flat cross-sectional shape, the length B of the flat cross-sectional shape in the longitudinal center line direction with respect to the maximum width C1 in the direction intersecting at right angles to the longitudinal center line direction The cross-sectional flatness represented by the ratio B / C1 is preferably in the range of 2 to 6 (more preferably 3.1 to 5.0). If the cross-sectional flatness is smaller than 2, the above-described effects due to the cross-sectional flatness may not be sufficiently obtained. Conversely, if the cross-sectional flatness is greater than 6, production may be difficult.

  Further, in the flat cross section of the polyester filament having the flat cross section, as shown schematically in FIG. 1, two or more (preferably 3 to 5) constrictions are formed per side, The ratio C1 / C2 of the maximum value C1 of the width to the minimum value C2 is preferably in the range of 1.05 to 4.00 (more preferably 1.1 to 1.5). In the cross section 1 shown in FIG. 1, three constricted portions are formed symmetrically with respect to the longitudinal center line. The constricted portion is preferably formed symmetrically with respect to the longitudinal center line, but may be asymmetrical. When the constricted part is formed in this way, the groove becomes a water guide groove, so when using a bag for extracting a beverage with a preference including a filter for extracting a beverage with preference in hot water or cold water, the beverage is extracted with a preference. The bag is preferred because it is easy to settle. Furthermore, even if the cross-sectional flatness is large by forming a groove in the longitudinal direction of the filament, twisting of the polyester filament is difficult to occur, and when a polyester-based filament having a flat cross-sectional shape is arranged on the warp and weft of the fabric, The side of the portion corresponding to the long side of the flat cross section is easy to be placed with the side facing the surface of the fabric, and even when using a polyester filament with a flat cross-sectional shape, the variation in the open area of the fabric due to twisting of the fiber There is also an effect that it hardly occurs.

  Moreover, in the said polyester-type polymer, it is preferable that content of a matting agent is 0.1 weight% or less. In particular, it is preferable that the matting agent is not contained in the copolyester. When the copolyester does not contain a matting agent such as titanium oxide, the polyester filaments become transparent, and the taste beverage powder such as tea leaves in the taste beverage extraction bag can be seen from the outside. And preferred.

The polyester-based filament having the flat cross-sectional shape as described above can be easily obtained by using the copolymer polyester as described above, for example, by the spinning method disclosed in International Publication WO 2004/009889. The form of the filament at that time may be a monofilament or a multifilament. In the copolyester, the content of a metal element having a true specific gravity of 5.0 g / cm ³ or more is preferably 0.5 ppm by weight or less. In particular, it is preferable that a metal such as antimony or germanium having a true specific gravity of 5.0 g / cm ³ or more is not contained in the copolyester. When a metal element having a true specific gravity of 5.0 g / cm ³ or more is contained in the copolymerized polyester, such a metal element may be dissolved when a palatable beverage extraction filter is used. The copolyester can be obtained using a catalyst containing a titanium compound and a phosphorus compound, as disclosed in International Publication WO 2004/063435.

  The production method of the polyester filament (1) is not particularly defined, but a melted polyester filament discharged from the spinneret as described above is provided directly below the spinneret using the copolymer polyester. After passing through a heat-retaining region having a length of 50 to 200 mm held at an ambient temperature of 50 to 200 ° C. to suppress rapid cooling, the molten polyester filament is rapidly cooled to change to a solid polyester filament, and is used as an oiling roller. Then, after oiling in the state of monofilament, it was wound at 500 to 2000 m / min with a first roller heated to 70 to 120 ° C. in a multifilament state, and then heated to 130 to 160 ° C. (more Wrapping around a second roller heated to 140-150 ° C) , It was stretched 2.0 to 5.0 times between the first roller and a second roller which accelerate the speed than the first roller, is obtained by winding at a lower speed than the second roller. In particular, it is preferable to set the temperature of the second roller within the range of 130 to 160 ° C. in order to reduce the boiling water shrinkage of the polyester filament (1).

  Moreover, about a polyester-type monofilament, it is obtained by dividing | segmenting the polyester-type filament obtained by this manufacturing method. In addition, it is preferable that the intrinsic viscosity (orthochlorophenol solution, 35 degreeC) of polyester used when manufacturing this polyester-type filament exists in the range of 0.60-1.20, and 0.70-1. A range of 00 is preferred. An intrinsic viscosity of less than 0.60 is not preferable because the strength of the fiber is insufficient. On the other hand, if the intrinsic viscosity exceeds 1.20, it is necessary to raise the intrinsic viscosity of the raw polymer excessively, which is uneconomical.

  In the polyester filament thus obtained, the tensile strength measured according to JIS L1013 is preferably 3.0 cN / dtex or more (preferably 3.5 to 6.0 cN / dtex). The boiling water shrinkage is preferably 15% or less (more preferably 12% or less, particularly preferably 1 to 11%). The elongation is preferably 20 to 50% (particularly preferably 25 to 40%). If the elongation is less than 20%, the yarn breakage in the spinning process, and when the monofilament is obtained thereafter, the yarn breakage in the splitting process increases and the process passability may be lowered. On the other hand, if it exceeds 50%, an unstretched portion due to stretch spots occurs, and this portion may cause yarn breakage in the spinning process or the fiber separation process, and the process passability may be reduced.

  In the filter for extracting a palatability beverage according to the present invention, the mixing rate of the polyester filament (1) is not particularly limited. However, the higher the mixing rate, the better the moldability and the palatability beverage powder is less likely to leak. An extraction filter is preferably obtained. The mixing ratio is preferably 30% by weight or more, more preferably 50% by weight or more, and most preferably 100% by weight.

In the palatable beverage extraction filter of the present invention, when other filaments are included, the other filaments are preferably a polyester monofilament having a round cross-sectional shape or a flat cross-sectional shape as described above. In particular, it is preferable that a polyester monofilament having a fineness of 10 to 60 dtex is included. It is preferable that the polyester-based polymer forming such other filaments does not contain a matting agent for the same reason as described above. Furthermore, it is preferable for the same reason as described above that the content of the metal element having a true specific gravity of 5.0 g / cm ³ or more contained in the polyester polymer forming other filaments is 0.5 ppm by weight or less.

  In the palatable beverage extraction filter of the present invention, it is sufficient that the filter has a woven or knitted structure, and the woven or knitted structure is not particularly limited. The woven structure of the woven fabric is preferably a plain woven structure. The knitted fabric structure is preferably a mesh knitted fabric. Further, as the density of the woven or knitted structure, the warp density is 30 to 300 / 2.54 cm (preferably 60 to 180 / 2.54 cm, more preferably 80 to 130 / 2.54 cm), and the weft density is It is preferable to be within the range of 30 to 300 / 2.54 cm (preferably 50 to 170 / 2.54 cm, more preferably 60 to 120 / 2.54 cm). If the density is larger than the range, the soft texture may be impaired. On the contrary, if the density is smaller than the range where the density is applied, there is a possibility that the palatable beverage powder is likely to leak.

  Further, the aperture ratio of the filter is preferably in the range of 40 to 75%. If the opening ratio is greater than 75%, the palatable beverage powder tends to leak. Conversely, if the aperture ratio is less than 40%, the soft texture may be impaired.

  The palatable beverage extracting filter of the present invention can be easily woven or knitted by the ordinary loom or knitting machine using the polyester filament (1). In addition, when heat setting is performed in a state where the knitted or knitted fabric is knitted and woven in the length direction and width direction (overfeed state), the polyester filament (1) contained in the woven or knitted fabric is contracted and fixed. Therefore, the heat shrinkage rate can be lowered, which is preferable. Here, the boiling water shrinkage is preferably 15% or less (more preferably 12% or less, and further preferably 1 to 6%). Since filaments made of copolyester usually have a high boiling water shrinkage, if a filter for extracting a favorite beverage is formed using such a filament having a high boiling water shrinkage, heat is applied during the molding process and use. Shrinkage occurs, the width becomes narrow, wrinkles occur, the density becomes unstable, and the product value may be lost. In addition, as conditions for performing a heat setting process in the state relaxed in the length direction and the width direction (overfeed state) of the woven or knitted fabric, for example, using a heat setter device, the melting point of the copolymer polyester is 20 Relaxed uniformly at 0.5 to 3.5% in the width direction for 1 to 3 minutes at a temperature lower than ℃ (more preferably 20 to 40 ° C.), and 0 to 0.5% in the length direction. Such conditions are preferred. If the difference between the heat treatment temperature and the melting point of the copolyester is within 20 ° C., the yarn strength tends to decrease, and the yarn may break at the pin portion of the heat setter or the filter may be broken. Further, as a more preferable condition, before heat treatment at a temperature 20 ° C. or more lower than the melting point of the copolyester (more preferably 20 to 40 ° C.), 1 to 3 minutes in the width direction and the length direction is performed. It is preferable to heat-treat once at 95 ° C. to 120 ° C. in a relaxed state of 0 to 3.0%.

  Moreover, in the palatable beverage extraction filter woven and knitted, at least a part of the intersecting portion of the filaments constituting the filter may be fused. For example, when the filter has a woven structure, at least a part of the intersection between the warp and the weft is fused, or when the filter has a knitted structure, at least one adjacent loop is formed. It may be partly fused. As described above, when at least a part of the intersecting portion of the filament is fused, the bag making property and the shape retaining property are improved when the bag for extracting the palatable beverage is made using the filter for extracting the palatable beverage. Also, there is an advantage that fraying hardly occurs at the cut end face.

  As for such fusion at the intersecting portions of the filaments, all the intersecting portions may be fused, or may be fused in a predetermined pattern such as vertical and horizontal lattices, diagonal lattices, and stripes. Among these, in order to obtain a softer texture, it is preferable that the layers are fused in a lattice pattern and the ratio of the fused portions is small. When the palatable beverage extraction filter of the present invention includes the polyester filament having the above-described flat shape, even if all the intersecting portions are fused, the soft texture is hardly impaired. In addition, what is necessary is just to heat-process a filter in the heating air heated to predetermined temperature in order to fuse | melt all the cross | intersection parts. Further, in order to fuse the intersecting portion with a predetermined pattern, the filter may be pressed with a heat roll or an ultrasonic roll having a predetermined pattern.

  When the palatable beverage extraction filter of the present invention includes a polyester filament having a flat shape as described above, the aperture ratio can be reduced without increasing the filter density due to the effect of the flat cross section. As a result, the palatable beverage extraction filter of the present invention has an effect that soft texture and palatable beverage powder are difficult to leak. Furthermore, when the intersections of the filaments are fused, the contact area of the intersections is increased, so that the fusion is facilitated.

  The palatable beverage extraction filter of the present invention includes a polyester filament formed solely from a copolymerized polyester component having a melting point of 160 to 240 ° C., and thus has a moldability equivalent to that of a conventional nylon fiber.

  Next, the bag for extracting a preference beverage of the present invention is a bag for extracting a preference beverage using a filter for extracting a preference beverage. Such palatable beverage extraction bags include bags used by immersing them in hot water or cold water and drip bags. In particular, a bag having a tetra shape as shown in FIG. 3 is preferable. In such a palatable beverage extraction bag, since the welding strength of the sealing portion of the extraction bag is higher than that of the conventional polyester fiber having a double core / sheath structure, the sealing portion does not open, and as a result, Taste-free beverage powder does not spill.

  Next, although the Example and comparative example of this invention are explained in full detail, this invention is not limited by these. In addition, each measurement item in an Example was measured with the following method.

(1) Softness of the texture According to sensory evaluation, three testers were (grade 4) very soft, (grade 3) soft, (grade 2) normal, (grade 1) hard 4 Rated to stage.

(2) Seal strength of palatable beverage extraction bag Extraction molded with ultrasonic seal as an index to evaluate the degree of welding (hardness to open or tear seal portion) of palatable beverage extraction bag The bag was cut into a strip shape with the seal portion at the center, and a strip-shaped filter was pulled around the seal portion with a tensile tester to measure the strength with which the seal portion was removed. Based on the measurement results, the welding condition of the seal portion is compared with the welding strength of the palatable beverage extraction bag made of nylon fiber, which is (class 4) equal to nylon fiber, (class 3) 60% or more of nylon fiber, (2 (Grade) 30-60% of nylon fiber and (grade 1) nylon fiber were evaluated in 4 grades of 30% or less.

(3) Resistance to leakage of palatability beverage powder As an index for evaluating the resistance to leakage of palatability beverage powder, powder made of Al ₂ O ₃ having a particle size of 250 to 355 μm (Ceramic polishing by Sansho Abrasive Co., Ltd.) The material White Alundum WAF54) is put into a palatable beverage extraction bag as if it were a palatable beverage powder, and the bag is immersed in hot water to prevent the powder from leaking (4th grade). Evaluation was made in four stages: (Leak 0-10%), (Class 3) leaked a little (10-25%), (Class 2) leaked (25-50%), (Class 1) leaked considerably (50% or more).

(4) Opening ratio of filter (%)
The aperture ratio (%) of the filter was calculated by the following formula. The opening area is the total area of openings formed by warps and wefts.
Opening ratio (%) = opening area (mm ² ) / total sample area (mm ² ) × 100

(5) Melting point Using a differential thermal analyzer 990 model manufactured by Du Pont, the melting peak was measured at a temperature elevation of 20 ° C / min to determine the melting point.

(6) Shape retention When a force is applied to the filter, the degree of opening is likely to occur (3rd grade), and the shape retention is less likely to occur. (2nd grade) Normal, (1st grade) The shape retention was evaluated in three stages: easy opening and poor shape retention.

(7) Formability When obtaining a palatable beverage extraction bag by ultrasonic sealing or heat sealing using a filter, whether the filter is not deformed or whether the seal portion of the molded extraction bag is welded is completed. Depending on whether or not the extraction bag is uniform, the (class 3) filter is difficult to deform, the seal part is firmly welded, and the extraction bag is uniform, or the (class 2) filter is deformed or the seal part is poorly welded or There are three types of extraction bags, one of which is uneven, the first grade filter is easily deformed, the seal is poorly welded, and the shape of the resulting extraction bag varies. The moldability was evaluated.

(8) Thermal contraction rate (BWS)
The test filament is wound 10 times around a measuring machine having a circumference of 1.125 m to prepare a skein, and this skein is hung on a hanging nail of a scale plate, and at the lower end of the hung skein, The length L1 before shrinkage treatment of the skein was measured by applying a load 1/30 of the total mass of the skein.
Remove the load from this skein, put the skein into a cotton bag, take out the cotton bag containing this skein from boiling water, take out the skein from this cotton bag, absorb the water contained in the skein with filter paper, This was air-dried at room temperature for 24 hours. The air-dried skein is hung on a hanging nail of the scale plate, and the lower part of the skein is applied with a load of 1/3 of the total mass of the skein, and the length of the skein after the shrinkage treatment is applied. L2 was measured. The boiling water shrinkage (BWS) of the test filament was calculated by the following formula.
BWS (%) = ((L1-L2) / L1) × 100
(9) Tensile strength and elongation of filament The tensile strength and elongation of the filament were measured according to JIS L1013.

[Example 1]
First, according to the method disclosed in the pamphlet of International Publication No. WO 2004/063435, 5 mmol% of trimellitic acid titanium (titanium compound) and 30 mmol% of triethylphosphonoacetate (phosphorus compound) are used as polymerization catalysts, and the acid component is mol. Copolymerized polyethylene terephthalate containing terephthalic acid and isophthalic acid in a ratio of 93/7 and having a diol component of ethylene glycol and containing no matting agent (melting point: 217 ° C., intrinsic viscosity: 0.64, true specific gravity: 5.0 g / cm ³ The above metal element content was 0 ppm, and no matting agent was contained. Then, after supplying to the melt spinning apparatus and spinning at a spinning temperature of 290 ° C., the first godet roller heated to 100 ° C. is turned 16 times with a speed of 4.4 times that of the first roller while taking up at 700 m / min. A polyester monofilament having a round cross section with a fineness of 27 dtex made of the above-mentioned copolymerized polyethylene terephthalate after splitting into multi-state polyester filaments by making 10 turns on a two godet roll (heating temperature 145 ° C.) 0.98 cN / dtex, elongation 40%, boiling water shrinkage 9.6%).

Subsequently, the polyester monofilament having the round cross section was arranged on the warp and the weft to weave a plain weave fabric, and the fabric was scoured by dipping treatment in a warm bath containing sodium carbonate at a temperature of 80 ° C. Then, it was washed with water and dried.
Next, using a heat setter device, the fabric was relaxed by 1.0% in the width direction and by 1.0% in the length direction for 1.5 minutes in heated air at a temperature of 120 ° C. Then, using a heat setter device, the fabric was relaxed by 1.0% in the width direction for 2 minutes in heated air at a temperature of 180 ° C. and 0.5% in the length direction. A heat set treatment was performed under such conditions as to relax, and a palatable beverage extraction filter composed of a plain tissue woven fabric having a density of 97 warps / 2.54 cm and a weft density of 98 / 2.54 cm was obtained.
In the palatable beverage extraction filter thus obtained, the aperture ratio was 65%, and the softness of the texture was grade 3 and excellent in softness. The strength of the polyester monofilament contained in the filter was 3.78 cN / dtex, the elongation was 37%, and the boiling water shrinkage was 3.5%.

Subsequently, the taste-extracting beverage extraction bag which has a tetra shape as shown in FIG. 3 was obtained by welding by the ultrasonic sealing method using the taste-extracting beverage extracting filter. The moldability of the extraction bag is good, and a powder made of Al ₂ O ₃ having a particle size of 250 to 355 μm (ceramic-based abrasive White Alundum WAF54 manufactured by Sansho Abrasive Co., Ltd.) is placed inside as a palatable beverage powder. The bag was soaked in hot water and evaluated for its resistance to leakage of palatable beverage powder.
Further, the extraction bag was cut into a strip shape with the seal portion at the center, and the welding condition of the seal portion was evaluated. Further, the shape retention property class 3 and the moldability property class 3, and the shape retention property and moldability were both good.

[Example 2]
Using the same copolymerized polyethylene terephthalate as in Example 1, a melt spinning hole drilled in a spinneret and having a shape corresponding to the filament cross-sectional shape shown in FIG. Each arc-shaped bulging portion and three constricted portions formed between them), spinning at a spinning temperature of 290 ° C., and then making 16 turns with a first godet roller heated to 100 ° C., 700 m / min 10 turns to a second godet roll (heating temperature 145 ° C.) 10 times at a speed 4.4 times that of the first roller while taking up in step 1, after winding the multi-state polyester filament, separating the filaments, and from the copolymer polyethylene terephthalate 1 has a cross-sectional shape having three constricted portions per side as shown in FIG. 1, the cross-sectional flatness is 3.2, and A polyester monofilament (strength: 3.32 cN / dtex, elongation: 38%, boiling water shrinkage: 10%) having a flat cross-sectional shape with a ratio C1 / C2 in the lament cross-sectional width of 1.2 and a fineness of 27 dtex is obtained. It was.

Next, a polyester monofilament made of the copolymerized polyethylene terephthalate and having a round cross section with a fineness of 27 dtex is arranged on the warp, while a polyester monofilament having a flat cross section with the fineness of 27 dtex is arranged on the weft. After weaving a woven fabric having a woven structure, the woven fabric was scoured by a dipping treatment in a hot bath containing sodium carbonate at a temperature of 80 ° C., washed with water and dried.
Subsequently, the fabric was heat-set in a relaxed state in heated air in the same manner as in Example 1 to obtain a warp density of 113 / 2.54 cm and a weft density of 80 / 2.54 cm as shown in FIG. A palatable beverage extraction filter comprising a plain tissue fabric having a density was obtained.
In the palatable beverage extraction filter thus obtained, the aperture ratio was 56%, and the softness of the texture was grade 3 and excellent in softness. The polyester monofilament having a flat cross section contained in the filter had a strength of 3.21 cN / dtex, an elongation of 35%, and a boiling water shrinkage of 4.1%.

Subsequently, the taste-extracting beverage extraction bag which has a tetra shape as shown in FIG. 3 was obtained by welding by the ultrasonic sealing method using the taste-extracting beverage extracting filter. The moldability of the extraction bag is good, and a powder made of Al ₂ O ₃ having a particle size of 250 to 355 μm (ceramic-based abrasive White Alundum WAF54 manufactured by Sansho Abrasive Co., Ltd.) is placed inside as a palatable beverage powder. The bag was soaked in hot water and evaluated for its resistance to leakage of palatable beverage powder.
Further, the extraction bag was cut into a strip shape with the seal portion at the center, and the welding condition of the seal portion was evaluated. Further, the shape retention property class 3, the moldability property class 3, and the shape retention property and moldability were both good.

[Example 3]
Using the same copolymerized polyethylene terephthalate as in Example 1, a melt spinning hole having a shape corresponding to the filament cross-sectional shape shown in FIG. 1 (four arc-shaped bulges per side on both sides of the longitudinal center line) And a first godet roller heated to 100 ° C. after spinning at a spinning temperature of 290 ° C. using a melt spinning apparatus having a spinneret with a perforated hole (having three constricted portions formed therebetween) 16 turns at 700 m / min while taking up at 700 m / min. 10 turns to the second godet roll (heating temperature 145 ° C.) at a speed 4.4 times that of the first roller, and after winding the multi-state polyester filament, splitting is performed. 1 having a cross-sectional shape having three constricted portions per one side as shown in FIG. 1 made of the copolymerized polyethylene terephthalate, and its flatness The polyester monofilament (strength: 3.32 cN / dtex, elongation: 38%, boiling water shrinkage) is 3.2, the ratio C1 / C2 in the filament cross-sectional width is 1.2, and has a flat cross-sectional shape with a fineness of 27 dtex. 10%).
The polyester monofilament having the flat cross-sectional shape is arranged on warps and wefts, and after weaving a plain weave fabric as in Example 1, the fabric is immersed in a warm bath containing sodium carbonate at a temperature of 80 ° C. After scouring by treatment, it was washed with water and dried.

Next, by performing heat setting treatment in a relaxed state on the fabric in heated air in the same manner as in Example 1, a plain tissue fabric having a warp density of 97 / 2.54 cm and a weft density of 88 / 2.54 cm was obtained. A filter for extracting a palatability beverage was obtained.
In the thus obtained palatable beverage extraction filter, the aperture ratio was 47% and the softness of the texture was grade 4 and was very excellent in softness. The polyester monofilament having a flat cross section contained in the filter had a strength of 3.20 cN / dtex, an elongation of 34%, and a boiling water shrinkage of 3.9%.

Subsequently, using the palatable beverage extraction filter, a tetra-shaped palatable beverage extraction bag as shown in FIG. 3 was obtained by welding by an ultrasonic sealing method. The moldability of the extraction bag is good, and a powder made of Al ₂ O ₃ having a particle size of 250 to 355 μm (ceramic-based abrasive White Alundum WAF54 manufactured by Sansho Abrasive Co., Ltd.) is placed inside as a palatable beverage powder. The bag was soaked in hot water and evaluated for its resistance to leakage of palatable beverage powder.
Further, the extraction bag was cut into a strip shape with the seal portion at the center, and the welding condition of the seal portion was evaluated. Further, the shape retention property class 3 and the moldability property class 3, and the shape retention property and moldability were both good.

[Example 4]
In the same manner as in Example 1, a filter for extracting a palatability beverage comprising a plain tissue woven fabric having a density of 97 warps / 2.54 cm and a weft density of 98 / 2.54 cm was obtained. Subsequently, the plain tissue woven fabric was hot-pressed at 200 ° C. with a heat roll carved with a diagonal lattice pattern to obtain a palatable beverage extraction filter having an oblique lattice pattern. In the heat press at 200 ° C., a portion where the intersection of the warp and the weft of the handle portion of the heat roll was partially fused was also observed. In the palatable beverage extraction filter thus obtained, the aperture ratio was 63%, and the softness of the texture was grade 3 and excellent in softness.

Subsequently, using the palatable beverage extraction filter, a tetra-shaped palatable beverage extraction bag as shown in FIG. 3 was obtained by welding by an ultrasonic sealing method. The moldability of the extraction bag is good, and a powder made of Al ₂ O ₃ having a particle size of 250 to 355 μm (ceramic-based abrasive White Alundum WAF54 manufactured by Sansho Abrasive Co., Ltd.) is placed inside as a palatable beverage powder. The bag was soaked in hot water and evaluated for its resistance to leakage of palatable beverage powder.
Further, the extraction bag was cut into a strip shape with the seal portion at the center, and the welding condition of the seal portion was evaluated.
Further, the shape retention property class 3, the moldability property class 3, and the shape retention property and moldability were both good.

[Comparative Example 1]
First, according to the method disclosed in the pamphlet of International Publication No. WO 2004/063435, a matting agent is used as a polymerization catalyst using 5 mmol% of trimellitic acid titanium (titanium compound) and 30 mmol% of triethylphosphonoacetate (phosphorus compound). Polyethylene terephthalate not contained (melting point 257 ° C., intrinsic viscosity 0.63, true specific gravity 5.0 g / cm ³ or more metal element content 0 ppm) was obtained.
Further, similarly to Example 1, a copolymerized polyethylene terephthalate containing no matting agent (melting point: 217 ° C., intrinsic viscosity: 0.64, true specific gravity: 5.0 g / cm ³ or more metal element content: 0 ppm) was obtained. .

Then, the polyethylene terephthalate is disposed in the core portion, while the copolymer polyethylene terephthalate is disposed in the sheath portion, supplied to the core-sheath type compound melt spinning apparatus, spun at a spinning temperature of 290 ° C., and then heated to 100 ° C. The first godet roller was turned 16 times and taken up at 700 m / min. The second godet roll (heating temperature 130 ° C.) was turned 10 times at a speed 4.4 times that of the first roller to wind up the multi-state polyester filament. Thereafter, the fiber is split, the polyethylene terephthalate is disposed in the core, and the copolymer polyethylene terephthalate is disposed in the sheath, and the core-sheath polyester monofilament having a round cross section with a fineness of 27 dtex (core and sheath) Volume ratio of 80:20) was obtained.
The obtained core-sheath polyester monofilament had a strength of 4.36 cN / dtex and an elongation of 39%.

Next, after the core-sheath polyester monofilament having the round cross section is arranged on the warp and the weft to weave a woven fabric having a plain woven fabric structure, the woven fabric is immersed in a warm bath containing sodium carbonate at a temperature of 80 ° C. After scouring, it was washed with water and dried.
Next, as in Example 1, the fabric was heat-set in a relaxed state in heated air to fuse all the intersections of the warp and weft of the fabric, resulting in a warp density of 97 / 2.54 cm, weft A filter for extracting a palatability beverage comprising a plain tissue woven fabric having a density of 98 / 2.54 cm was obtained.
In the palatable beverage extraction filter thus obtained, the aperture ratio was 65%, and the softness of the texture was first grade and inferior to the softness.

Subsequently, the taste-extracting beverage extraction bag which has a tetra shape as shown in FIG. 3 was obtained by welding by the ultrasonic sealing method using the taste-extracting beverage extracting filter. However, the moldability of the extraction bag is not so good, and a phenomenon that the seal part is partially opened is also observed, so that it is necessary to reduce the processing speed of the extraction bag.
Further, by immersing a bag containing the powder particle size as palatability beverage powder is made of _Al 2 _{O 3} of 250～355Myuemu (SanAkira abrasive Ltd. ceramic abrasive white Alundum WAF54) inside the hot water, As a result of evaluating the difficulty of leakage of the palatable beverage powder, there was a slight leakage of the third grade and powder.
Further, the extraction bag was cut into a strip shape around the seal portion, and the welding condition of the seal portion was evaluated. As a result, the extraction bag was considerably inferior to the extraction bag made of first grade and nylon fibers, and the welding strength was weak. Further, the shape retention was as good as grade 3, but the moldability was grade 2 and poor welding was observed.

[Comparative Example 2]
First, according to the method disclosed in the pamphlet of International Publication No. WO 2004/063435, a matting agent is used as a polymerization catalyst using 5 mmol% of trimellitic acid titanium (titanium compound) and 30 mmol% of triethylphosphonoacetate (phosphorus compound). Polyethylene terephthalate not contained (melting point 257 ° C., intrinsic viscosity 0.63, true specific gravity 5.0 g / cm ³ or more metal element content 0 ppm) was obtained.
Further, similarly to Example 1, a copolymerized polyethylene terephthalate containing no matting agent (melting point: 217 ° C., intrinsic viscosity: 0.64, true specific gravity: 5.0 g / cm ³ or more metal element content: 0 ppm) was obtained. .

  The polyethylene terephthalate is arranged in the core, while the copolymer polyethylene terephthalate is arranged in the sheath, supplied to the core-sheath type compound melt spinning apparatus, spun at a spinning temperature of 290 ° C., and then heated to 100 ° C. The first godet roller was turned 16 times and taken up at 700 m / min. The second godet roll (heating temperature 130 ° C.) was turned 10 times at a speed 4.4 times that of the first roller to wind up the multi-state polyester filament. Thereafter, the fiber is split, and the polyethylene terephthalate is disposed in the core, and the copolymer polyethylene terephthalate is disposed in the sheath. The sheath-core polyester monofilament having a round cross section with a single yarn fineness of 27 dtex (core and sheath Part volume ratio 80:20) was obtained.

  On the other hand, using the above-mentioned polyethylene terephthalate, one melt spinning hole (4 per side on each side of the longitudinal center line) perforated in a spinneret and having a shape corresponding to the filament cross-sectional shape shown in FIG. Each arcuate bulge and three constrictions formed between them), spinning at a spinning temperature of 300 ° C. and then making 16 turns with a first godet roller heated to 100 ° C., 700 m / min As shown in FIG. 1, the multi-state polyester filament is wound up by making 10 turns to the second godet roll (heating temperature 130 ° C.) 10 times at a speed 4.4 times that of the first roller. And has a cross-sectional shape with three constrictions per side, the cross-sectional flatness is 3.2, and the ratio C1 / C2 in the filament cross-sectional width is 1.2. There was obtained a polyester monofilament having a flat sectional shape of the single yarn fineness 27Dtex.

Then, the core-sheath polyester monofilament having a round cross section is arranged on a warp, while the polyester monofilament having the flat cross section is arranged on a weft to weave a woven fabric having a plain woven structure, The woven fabric was scoured by dipping treatment in a warm bath containing sodium carbonate at a temperature of 80 ° C., washed with water and dried.
Next, in the same manner as in Example 1, in the heated air, the fabric is heat-set in a relaxed state to fuse all the intersections of the warp and weft of the fabric, whereby the warp density as shown in FIG. A filter for extracting a palatability beverage comprising a plain tissue fabric having a density of 113 / 2.54 cm and a weft density of 80 / 2.54 cm was obtained.
In the palatable beverage extraction filter thus obtained, the aperture ratio was 56%, and the softness of the texture was grade 3 and excellent in softness. The strength of the core-sheath polyester monofilament contained in the filter was 4.36 cN / dtex, and the elongation was 39%. The polyester monofilament having a flat cross section contained in the filter had a strength of 3.81 cN / dtex and an elongation of 38%.

Subsequently, the taste-extracting beverage extraction bag which has a tetra shape as shown in FIG. 3 was obtained by welding by the ultrasonic sealing method using the taste-extracting beverage extracting filter. However, the moldability of the extraction bag is not so good, and a phenomenon that the seal part is partially opened is also observed, so that it is necessary to reduce the processing speed of the extraction bag.
Further, by immersing a bag containing the powder particle size as palatability beverage powder is made of _Al 2 _{O 3} of 250～355Myuemu (SanAkira abrasive Ltd. ceramic abrasive white Alundum WAF54) inside the hot water, As a result of evaluating the difficulty of leakage of the palatability beverage powder, the fourth grade and the powder hardly leaked.
Further, the extraction bag was cut into a strip shape around the seal portion, and the welding condition of the seal portion was evaluated. As a result, the extraction bag was considerably inferior to the extraction bag made of first grade and nylon fibers, and the welding strength was weak. Further, the shape retention was as good as grade 3, but the moldability was grade 2 and poor welding was observed.

[Comparative Example 3]
First, according to the method disclosed in the pamphlet of International Publication No. WO 2004/063435, a matting agent is used as a polymerization catalyst using 5 mmol% of trimellitic acid titanium (titanium compound) and 30 mmol% of triethylphosphonoacetate (phosphorus compound). Polyethylene terephthalate not contained (melting point 257 ° C., intrinsic viscosity 0.63, true specific gravity 5.0 g / cm ³ or more metal element content 0 ppm) was obtained. Then, after supplying to the melt spinning apparatus and spinning at a spinning temperature of 300 ° C., the first godet roller heated to 100 ° C. is turned 16 times with the first godet roller being pulled at 700 m / min. The polyester monofilament having a round cross section with a fineness of 27 dtex made of the polyethylene terephthalate was obtained after the polyester-type filament in multi-state was wound up by two turns on a two-godet roll (heating temperature 130 ° C.) and then split.

  In Example 1, the same procedure as in Example 1 was carried out except that a polyester monofilament made of polyethylene terephthalate and having a round cross section with a fineness of 27 dtex was arranged on all warps and wefts, and warp density 97 pieces / 2.54 cm, wefts A filter for extracting a palatability beverage comprising a plain tissue woven fabric having a density of 98 / 2.54 cm was obtained. In the palatable beverage extraction filter thus obtained, the aperture ratio was 65%, and the softness of the texture was grade 3 and excellent in softness. The strength of the polyester monofilament having a round cross section contained in the filter was 4.72 cN / dtex, and the elongation was 36%.

Subsequently, the taste-extracting beverage extraction bag which has a tetra shape as shown in FIG. 3 was obtained by welding by the ultrasonic sealing method using the taste-extracting beverage extracting filter.
However, the moldability of the extraction bag is not so good, and a phenomenon that the seal part is partially opened is also observed, so that it is necessary to reduce the processing speed of the extraction bag.
Further, by immersing a bag containing the powder particle size as palatability beverage powder is made of _Al 2 _{O 3} of 250～355Myuemu (SanAkira abrasive Ltd. ceramic abrasive white Alundum WAF54) inside the hot water, As a result of evaluating the difficulty of leaking the palatable beverage powder, it was grade 3 and a slight powder leak was observed.
Further, the extraction bag was cut into a strip shape around the seal portion, and the welding condition of the seal portion was evaluated. As a result, the extraction bag was considerably inferior to the extraction bag made of first grade and nylon fibers, and the welding strength was weak. Further, the shape retention was as good as grade 3, but the moldability was grade 2 and poor welding was observed.

  According to the present invention, a filter for extracting a palatability beverage excellent in transparency, soft texture, resistance to leaking palatability beverage powder, moldability (bag forming property), shape retention, commercial value, and the like, and a production method thereof, and An extraction bag is obtained. Such a bag for extracting a favorite beverage extraction filter is useful for extracting a favorite beverage such as black tea, green tea, sencha, barley tea, oolong tea, jasmine tea, and apple tea, and its industrial value is extremely large.

It is explanatory drawing which shows an example of the cross-sectional shape of the flat polyester type | system | group monofilament which can be employ | adopted in the filter for taste drink extraction of this invention. It is a drawing substitute photograph which shows an example of the filter for taste drink extraction of this invention. It is explanatory drawing which shows tetra shape.

Explanation of symbols

1 Constriction

Claims (21)

  A filter for extracting a palatable beverage having a woven or knitted structure, wherein the filter is formed of a copolymerized polyester component alone having a melting point of 160 to 240 ° C. and has a tensile strength measured by JIS L1013 of 3.0 cN / dtex. A filter for extracting a palatable beverage, comprising the polyester filament (1) as described above.   The filter for liquor extraction according to claim 1, wherein the polyester filament (1) has a boiling water shrinkage of 15% or less.   The filter for extracting a palatable beverage according to claim 1 or 2, wherein the copolymerized polyester is polyethylene terephthalate copolymerized with isophthalic acid.   The filter for extracting a palatable beverage according to claim 1 or 2, wherein the copolymerized polyester is polybutylene terephthalate copolymerized with isophthalic acid.   The palatable beverage extraction filter according to any one of claims 1 to 4, wherein the polyester filament (1) is a monofilament having a single fiber fineness of 10 to 60 dtex.   The single filament cross-sectional shape of the polyester filament (1) has a flat cross-sectional shape, and intersects with the length B in the longitudinal centerline direction of the flat cross section at a right angle to the longitudinal centerline direction. The filter for extracting a liking beverage according to any one of claims 1 to 5, wherein the cross-sectional flatness represented by the ratio B / C1 to the maximum width C1 in the direction is in the range of 2 to 6.   In the flat cross section of the polyester filament (1), two or more constricted portions are formed on one side, and the ratio C1 / C2 of the maximum value C1 of the width to the minimum value C2 is 1.05-4. The filter for extracting a palatable beverage according to claim 6, which is within a range of 0.00.   The palatable beverage extraction filter according to any one of claims 1 to 7, wherein the polyester filament (1) does not contain a matting agent. In the said polyester-type filament (1), content of the metal element of true specific gravity 5.0g / cm < ³ > or more is 0.5 weight ppm or less, The palatability drink extraction in any one of Claims 1-8 Filter.   The filter for extracting a palatable beverage according to any one of claims 1 to 9, wherein the filter for extracting a palatable beverage is composed only of the polyester filament (1).   The filter for extracting a preference beverage according to any one of claims 1 to 10, wherein the filter for extracting a preference beverage has a plain fabric structure.   The filter for extracting a preference beverage has a woven fabric structure, and has a warp density of 30 to 300 / 2.54 cm and a weft density of 30 to 300 / 2.54 cm. The filter for extracting a preference beverage according to any one of the above.   The filter for extracting a preference beverage according to any one of claims 1 to 10, wherein the filter for extracting a preference beverage has a mesh knitted tissue.   The filter for extracting a palatable beverage according to any one of claims 1 to 13, wherein the opening ratio of the filter for extracting a palatable beverage is within a range of 40 to 75%.   The filter for extracting palatable beverages according to any one of claims 1 to 14, wherein at least a part of the intersecting portions of the filaments constituting the filter is fused.   The palatable beverage extraction filter according to any one of claims 1 to 15, wherein the intersecting portions of the filaments are fused in a lattice pattern.   Weaving or knitting a woven or knitted fabric using a polyester filament (1) that is formed of a copolymerized polyester component alone having a melting point of 160 to 240 ° C. and has a tensile strength measured by JIS L1013 of 3.0 cN / dtex or more. The manufacturing method of the filter for taste drink extraction of Claim 1 characterized by these.   The method for producing a palatable beverage extraction filter according to claim 17, wherein the polyester filament (1) has a boiling water shrinkage of 15% or less.   The method for producing a palatable beverage extraction filter according to claim 18, wherein the woven or knitted fabric is subjected to heat setting after being woven or knitted.   A bag for extracting a palatable beverage using the filter for extracting a palatable beverage according to any one of claims 1 to 16.   The bag for extracting beverages according to claim 20, wherein the bag for extracting beverages has a tetra shape.