KR20090065536A - Filter for extracting luxury drink and bag for extracting luxury drink - Google Patents

Abstract

A filter for extracting a luxury drink being composed of polyester-based monofilaments and having a woven texture or a knitted texture, characterized in that the filter comprises polyester-based monofilaments having a flat cross section shape; and a bag filter for extracting a luxury drink in which the filter for extracting a luxury drink is used.

Description

FILTER FOR EXTRACTING LUXURY DRINK AND BAG FOR EXTRACTING LUXURY DRINK}

The present invention is a filter used for the extraction of palates such as green tea, black tea, oolong tea, barley tea, jasmine tea, apple tea, broth, coffee, cocoa, etc. The present invention relates to a palate for extracting palate beverages and a palate for extracting palates made of palate beverage extraction filters.

Conventionally, as a filter for extracting a palate drink used when drinking a palate, such as green tea or black tea, the thing comprised by the nonwoven fabric, paper, etc. which consist of polyolefin fiber, polyester fiber, etc. has been mainly used.

In recent years, it has been proposed to construct a filter for palatable beverage extraction from a mesh fabric woven into plain weave tissue using nylon monofilament or polyester monofilament. The palate for extracting beverages using a filter made of such a mesh fabric has a sense of quality because the tea leaves inside the bag are visible from the outside, and furthermore, it has a feature of excellent fragrance and extractability.

However, in palatable beverage extraction filters and palate beverage extraction bags containing nylon monofilament, yellowing due to oxygen in the air, dimensional changes due to hot water during extraction, shape collapse, color tone change due to absorption of palate beverage components There was a problem such as poor liquid drainage when the bag was taken out of the container after use, poor sedimentation of the extraction bag in the hot water due to the specific gravity of light nylon, and environmental pollution due to the generation of nitrogen oxides by incineration after use.

On the other hand, the palate beverage extraction filter and the palate beverage extraction bag containing the polyester monofilament include a fabric in which the intersection point of the warp and the weft is not fused, or a fabric in which the intersection point of the warp and the weft is fused. And the like have been proposed (see, for example, Patent Document 1 and Patent Document 2).

However, in the case where the extraction filter includes a woven fabric in which the cross section of the yarn is not fused, the texture is soft, but the bag manufacturability and shape retention at the time of manufacturing the extraction bag are not sufficient. Further, there was a problem in that the timber due to the shape collapse of the fabric is opened or tea leaves leak. On the other hand, when the extraction filter includes a woven fabric in which the cross section of the yarn is fused, there is a problem in that the manufacturability and shape retention at the time of manufacturing the extraction bag are excellent, but the texture is hard. Furthermore, in the case of obtaining a tetra-shaped extraction bag which has become popular in recent years by using such an extraction filter, when the extraction bag is deformed by an external force, the extraction bag does not return to the bonded state with its deformation. There was problem that this was bad.

In addition, Patent Document 3 discloses a polyester multifilament having a flat cross-sectional shape. In addition, Patent Document 4 discloses a polyester multifilament made of a polyester obtained by using a catalyst containing a titanium compound and a phosphorus compound. Moreover, the tetra-shaped palate extracting bag is disclosed by patent document 5. As shown in FIG.

Patent Document 1: Japanese Patent No. 3459951

Patent Document 2: Japanese Patent No. 3459952

Patent Document 3: International Publication WO2004 / 009889 Pamphlet

Patent Document 4: International Publication WO2004 / 063435 Pamphlet

Patent Document 5: Japanese Patent Laid-Open No. 5-193615

<Start of invention>

An object of the present invention is to provide a palate for extracting palatable beverages having a soft texture and hardly leaking palate beverage powders, and a palate for extracting palatable beverages using the palate. The above object can be attained by the palate extracting filter and palate extracting bag of the present invention.

The palate beverage extraction filter of the present invention is a palate beverage extraction filter composed of a polyester monofilament and having a woven or knitted structure, and a polyester monofilament having a flat cross-sectional shape with the polyester monofilament. It is a filter for preference beverage extraction, characterized in that it is included.

Here, it is preferable that the single yarn fineness of the said polyester monofilament exists in the range of 10-60 dtex. Further, in the polyester monofilament having the flat cross-sectional shape, the ratio of the length B in the longitudinal center line direction of the flat cross-sectional shape to the maximum width C1 in the direction crossing at right angles to the longitudinal center line direction. It is preferable that the cross-sectional flatness represented by (B / C1) exists in the range of 2-6. Moreover, in the flat cross section of the polyester monofilament which has the said flat cross-sectional shape, two or more narrowing parts are formed per one side, and ratio of the maximum value C1 of the width to the minimum value C2 (C1 / It is preferable that C2) exists in the range of 1.05-4.00. It is preferable that the polyester monofilament which has the said flat cross-sectional shape is formed from the polyethylene terephthalate which exists in the range of melting | fusing point 255-265 degreeC. Further, in the polyester monofilament having the flat cross-sectional shape, the polyester monofilament has a core-sheath structure, and the core component is formed of polyethylene terephthalate having a melting point of 255 to 265 ° C. It is preferable that the cis component is formed of polyethylene terephthalate copolymerized with isophthalic acid in the melting point of 170 to 240 ° C.

In the polyester monofilament constituting the palate beverage extraction filter of the present invention, it is preferable that a polyester monofilament having a ring cross-sectional shape is included as another polyester monofilament. In particular, it is preferable that the polyester monofilament which has a ring cross-sectional shape of the range of 10-60 dtex of single yarn fineness is contained. The polyester monofilament having such a ring cross-sectional shape has a core-sheath structure, and the core component is formed of polyethylene terephthalate having a melting point of 255 to 265 ° C, while the sheath component has a melting point of 170 to 240 ° C. It is preferably formed of polyethylene terephthalate copolymerized with isophthalic acid.

In the palate beverage extraction filter of the present invention, it is preferable that the polyester monofilament does not contain a gloss remover. Moreover, in polyester monofilament, it is preferable that content of the metal element of 5.0 g / cm <3> or more of true specific gravity is 0.5 weight ppm or less.

In the palate beverage extraction filter of the present invention, it is preferable that the palate beverage extraction filter has a textile structure, and the warp density is in the range of 30 to 300 pieces / 2.54 cm, and the weft density is in the range of 30 to 300 pieces / 2.54 cm. Do. It is also preferable that the palate beverage extracting filter has a plain weave texture. The filter for palate beverage extraction may have a mesh knitted structure. Moreover, it is preferable that the opening ratio of the filter for preference beverage extraction exists in 40 to 75% of range. In addition, in the filter for preference beverage extraction, it is preferable that at least one part of the intersection part of the filament which comprises a filter is fused. At this time, it is preferable that the intersection of the filaments is fused in a lattice pattern.

The palate for extracting palatable beverages of the present invention is a palate for extracting palatable beverages using the palate extracting filter. As such a palate for extracting a palate, it is preferable to have tetra shape.

BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing which shows an example of the cross-sectional shape of the flat polyester monofilament which can be employ | adopted in the filter for preference beverage extraction of this invention.

FIG. 2 is a drawing substitute photograph showing an example of the palate beverage extraction filter of the present invention. FIG.

3 is an explanatory diagram showing a tetra shape.

Best Mode for Carrying Out the Invention

The palatable beverage extraction filter of the present invention is a palate beverage extraction filter composed of polyester monofilament and having a woven or knitted structure, and the filter includes a polyester monofilament having a flat cross-sectional shape. .

The palatable beverage extraction filter of the present invention includes a polyester monofilament having such a flat cross-sectional shape, and thus has a flat cross section in comparison with a filter including a monofilament having no flat shape such as an annular cross section or a triangular cross section of the same fineness. By the effect of, the aperture ratio can be reduced without increasing the density of the filter. As a result, the filter for palatable beverage extraction which has a soft touch and hardly leaks palate beverage powder is obtained.

The single yarn fineness of the polyester monofilament is preferably in the range of 10 to 60 dtex (more preferably 10 to 40 dtex, more preferably 20 to 35 dtex). If the single yarn fineness is larger than 60 dtex, there is a fear that the thickness of the filter becomes large and the soft feel is damaged. Conversely, if the single yarn fineness is smaller than 10 dtex, there is a fear that sufficient monofilament strength cannot be obtained. In addition, if the filter weaving or shredding density is not significantly increased, the beverage beverage may easily leak, and if the density is increased, the difficulty of weaving or shredding may be increased and the cost may be increased.

In the polyester monofilament having the flat cross-sectional shape, the ratio of the length B in the longitudinal center line direction of the flat cross-sectional shape to the maximum width C1 in the direction crossing at right angles to the longitudinal center line direction. It is preferable that the cross-sectional flatness represented by (B / C1) exists in the range of 2-6 (more preferably 3.1-5.0). If the cross-sectional flatness is smaller than 2, there is a concern that the effect due to the cross-sectional flatness as described above may not be sufficiently obtained. On the contrary, when cross-sectional flatness is larger than 6, there exists a possibility that manufacture may become difficult.

Moreover, in the flat cross section of the polyester monofilament which has the said flat cross section shape, as shown typically in FIG. 1, 2 or more (preferably 3-5 pieces) narrowing parts are formed per side | surface, It is preferable that the ratio C1 / C2 of the maximum value C1 of the width to the minimum value C2 is in the range of 1.05 to 4.00 (more preferably 1.1 to 1.5). In addition, in the cross section 1 shown in FIG. 1, three narrow portions are formed symmetrically with respect to the length center line. It is preferable that the constriction is formed symmetrically with respect to the length centerline, but it does not interfere even if it is asymmetric. Since the groove is a frequency groove when the cutout is formed in this manner, the palate for extracting the palate is likely to settle when the palate for extracting the palate containing the palate is extracted in hot or cold water. Furthermore, when the monofilament has a groove in the longitudinal direction, it is difficult to cause distortion in the polyester monofilament even when the cross-sectional flatness is large, and when a polyester monofilament having a flat cross-sectional shape is disposed on the warp or weft of the fabric, The side surface of the portion corresponding to the long side of the flat cross section tends to be disposed toward the surface of the fabric, and even when a polyester monofilament having a flat cross-sectional shape is used, variations in the aperture ratio of the fabric due to the twisting of the fabric are unlikely to occur. There is also a losing effect.

The polyester polymer forming the polyester monofilament is made of a dicarboxylic acid component and a diglycol component. It is preferable that mainly a terephthalic acid is used as a dicarboxylic acid component, and it is preferable to use 1 or more types of alkylene glycol mainly selected from ethylene glycol, trimethylene glycol, and tetramethylene glycol as a diglycol component. Especially, polyethylene terephthalate in the range of melting | fusing point 255-265 degreeC is preferable. In addition, the polyester-based polymer may contain a third component in addition to the dicarboxylic acid component and the glycol component. As the third component, dicarboxylic acids other than terephthalic acid, such as isophthalic acid, naphthalenedicarboxylic acid, adipic acid and sebacic acid; And glycol compounds other than alkylene glycol, for example, diethylene glycol, polyethylene glycol, bisphenol A, and one or more kinds of bisphenol sulfone can be used. Especially, an acid component consists of terephthalic acid and isophthalic acid of the molar ratio (terephthalic acid / isophthalic acid) 90/5-85/15, a glycol component consists of ethylene glycol, melting | fusing point 170-240 degreeC (more preferably 180) It is preferable that it consists of co-polyester (degreeC-220 degreeC). If a polyester monofilament has such melting | fusing point, when fusion | melting monofilaments with each other as mentioned later, fusion becomes easy and it is preferable.

Further, the polyester monofilament has a core-cis structure and the core component is formed of polyethylene terephthalate having a melting point of 255 to 265 ° C, while the sheath component has a melting point of 170 to 240 ° C (more preferably). It is preferably formed of polyethylene terephthalate copolymerized with isophthalic acid in the range of 180 ° C to 220 ° C. The melting point of the cis component can be controlled by adjusting the amount of isophthalic acid to be copolymerized. Here, when melting | fusing point is lower than 170 degreeC, when fusing monofilaments with each other as mentioned later, it can fuse easily, but the fiber strength of a monofilament falls, a weaving property worsens, or the process passability of a weaving process There is a risk of deterioration. On the contrary, when melting | fusing point of a sheath component becomes higher than 240 degreeC, there exists a possibility that adhesiveness may worsen and sufficient adhesive force may not be obtained. In addition, the volume ratio of the core portion and the sheath portion is in the range of 80:20 to 20:80 in the former: latter, preferably in the range of 70:30 to 30:70, more preferably in the range of 60:40 to 40:60. It is preferable to exist in the range. In addition, when the volume ratio of the core component is less than 50%, the fiber strength of the monofilament may decrease, the weaving properties may deteriorate, or the process passability of the weaving process may be deteriorated. It is still more preferable to keep it at 50% or more.

Moreover, in the said polyester type polymer, it is preferable that content of a gloss removal agent is 0.1 weight% or less. It is particularly preferable that the gloss remover is not included in the polyester polymer. When the polyester-based polymer does not contain a gloss remover such as titanium oxide, the polyester-based monofilament becomes transparent, and palates such as tea leaves in the palate for extracting palate beverages are visible from the outside, creating a sense of quality. desirable.

The polyester monofilament having a flat cross-sectional shape as described above can be easily obtained using the polyester polymer as described above, for example, by the spinning method disclosed in the pamphlet of International Publication WO2004 / 009889. . In that case, you may spin and stretch as a monofilament, and you may split into a monofilament after spinning and extending as a multifilament. Moreover, in a polyester polymer, it is preferable that content of the metal element of 5.0 g / cm <3> or more of true specific gravity is 0.5 weight ppm or less. In particular, it is preferable that metals, such as antimony and germanium, of a specific gravity of 5.0 g / cm <3> or more are not contained in a polyester-type polymer. If the metal element of 5.0 g / cm <3> or more of true specific gravity is contained in a polyester-type polymer, when using the filter for palate extraction, such a metal element may elute. In addition, the polyester-based polymer can be obtained using a catalyst containing a titanium compound and a phosphorus compound, as disclosed in the international publication WO2004 / 063435 pamphlet.

In the palatable beverage extraction filter of the present invention, the kneading ratio of the polyester monofilament having the flat cross-sectional shape is not particularly limited. However, the higher the kneading ratio, the palatability of the palate and the palatability of the palate powder. A filter for beverage extraction is obtained and preferable. As the mixing ratio, 30 weight% or more is preferable, 50 weight% or more is more preferable, and 100 weight% is the most preferable.

In the palate beverage extraction filter of the present invention, when a non-flat polyester monofilament such as a ring cross section or a triangular cross section is included as another monofilament, as another polyester monofilament, a polyester having a ring cross-sectional shape Preference is given to system monofilaments. In particular, it is preferable that the polyester monofilament which has ring cross-sectional shape whose single yarn fineness is the range of 10-60 dtex is contained. As the polyester monofilament having such a ring cross-sectional shape, the core component is formed of polyethylene terephthalate having a melting point of 255 to 265 ° C, while the cis component copolymerizes isophthalic acid having a melting point of 170 to 240 ° C. It is preferably formed of one polyethylene terephthalate. Adopting such monofilament as another monofilament can facilitate the fusion when the monofilaments are fused together. Moreover, it is preferable that the polyester polymer which forms such another monofilament also does not contain the gloss removal agent for the same reason as mentioned above. Furthermore, it is preferable that content of the metal element of 5.0 g / cm <3> or more of true specific gravity contained in the polyester polymer which forms another monofilament is 0.5 weight ppm or less for the same reason as mentioned above. In addition, the volume ratio of the core portion and the sheath portion is in the range of 80:20 to 20:80 in the former: the latter, preferably in the range of 70:30 to 30:70, more preferably in the range of 60:40 to 40:60. It is preferable to exist in the range. In addition, when the volume ratio of the core component is less than 50%, the fiber strength of the monofilament may decrease, the weaving properties may deteriorate, or the process passability of the weaving process may be deteriorated. It is still more preferable to keep it at 50% or more.

In the palate beverage extraction filter of the present invention, the filter may have a woven fabric or a knitted fabric, and the straight tissue is not particularly limited. For example, a woven fabric in which a fabric structure is adopted and the polyester monofilament having the flat cross-sectional shape is disposed on the warp and weft of the fabric, and the polyester mono having the flat cross-sectional shape on either of the warp and weft of the fabric. A fabric in which a filament is disposed and a non-flat polyester monofilament is disposed on the other side, alternately a polyester monofilament having a flat cross-sectional shape and a non-flat polyester monofilament on the warp and / or weft of the fabric One fabric and the like are preferred. As the woven fabric of the woven fabric, a plain weave tissue is preferable. Moreover, as knitted fabric of a knitted fabric, mesh knitted fabric is preferable.

In addition, the density of the knitted fabric is 30 to 300 pieces / 2.54 cm (preferably 60 to 180 pieces / 2.54 cm, more preferably 80 to 130 pieces / 2.54 cm), and the weft density is 30 to 300. It is preferable to exist in the range of 2 / 2.54 cm (preferably 50-170 piece / 2.54 cm, More preferably, 60-120 piece / 2.54 cm). If the density is larger than this range, the soft texture may be damaged. On the contrary, when the density is smaller than this range, there is a fear that the palate is liable to leak.

Moreover, as an opening ratio of a filter, it is preferable to exist in 40 to 75% of range. When the opening ratio is larger than 75%, there is a fear that the palate is liable to leak. On the contrary, when the opening ratio is smaller than 40%, the soft texture may be damaged.

The filter for preference beverage extraction of this invention uses the polyester-based monofilament which has the said flat cross-sectional shape at least, and uses the polyester-based monofilament which is not flat as needed, and it is easy by a conventional loom or knitting machine. You can knit.

In the knitted knitted palate extract, it is preferable that at least a portion of the intersection of the filaments constituting the filter is fused. For example, when the filter has a woven fabric, it is preferable that at least part of the intersection of the warp yarn and the weft yarn is fused. In addition, when the filter has a knitted structure, it is preferable that at least part of adjacent loops are fused. Thus, if at least a part of the intersections of the filaments are fused, the manufacture of the palatable beverage extraction using the palatable beverage extraction filter improves the bag manufacturability and shape retention, and also causes loosening in the cut section. It is difficult to do so it is preferable.

The fusion at the intersection of such filaments may be fused at all intersections, or may be fused in a predetermined pattern such as a longitudinal grid, an inclined grid, or a stripe. Especially, in obtaining a softer feel, it is preferable to fuse | melt in a grid | lattice-like pattern. Moreover, since the polyester-based monofilament which has the said flat shape is contained in the palate beverage extraction filter of this invention, even if all the intersection parts are fusion | melted, the soft touch is not impaired. In addition, in order to fuse all the intersection parts, what is necessary is just to heat-process a filter in the heating air heated at predetermined temperature. In addition, what is necessary is just to heat a filter with the heat roll which has a predetermined pattern pattern, in order to fuse an intersection part by a predetermined pattern.

Since the filter for preference beverage extraction of this invention contains the polyester-type monofilament which has the above flat shape, the opening ratio can be made small without increasing the density of a filter by the effect of a flat cross section. As a result, the palate beverage extraction filter of the present invention has the effect that the soft texture and palate powder are hard to leak. Furthermore, when fusing the intersection of filaments, since the contact area of the intersection becomes large, welding becomes easy.

Next, the palate for extracting palatable beverage of the present invention is a palate for extracting palatable beverage made using a palate extracting filter. Such palate beverage extraction bags include bags or drip bags used by being immersed in hot or cold water. In particular, a bag having a tetra shape as shown in Fig. 3 is preferable.

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

(1) softness of texture

Three investigators evaluated sensory evaluation in four stages: (grade 4) very soft, (grade 3) soft, (grade 2) moderate, and (grade 1) hardness.

(2) Leakage of palate beverage powder

As an indicator for evaluating the leakiness of palatable beverage powders, a powder for palatability beverage extraction was selected by selecting a palate (powder composed of Al ₂ O ₃ having a particle diameter of 250 to 355 μm) (ceramic abrasive WHITE ARANDOM WAF54 manufactured by Sansho Abrasives Co., Ltd.) as palatable beverage powder. A certain amount is put inside, and the bag is immersed in warm water, and the leakage of powder (class 4) hardly leaks powder (leakage 0-10%), (class 3) slightly leaks (10-25%), (Level 2) Leakage (25-50%), (Level 1) Significant leakage (at least 50%) was evaluated in four stages.

(3) Opening ratio of filter (%)

The opening ratio (%) of the filter was calculated by the following equation. The opening area is the total area of the opening formed by the warp and the weft.

Opening ratio (%) = opening area (mm2) / sample total area (mm2) * 100

(4) melting point

The melting point was calculated | required by measuring the melting peak at the temperature of 20 (square) / min using the Du Pont company thermal difference analyzer 990 type | mold.

(5) prosthesis

When the filter is applied, it is difficult for the (class 3) job to open and the shape retention is good, depending on whether or not it is easy to open the job. Prosthesis was evaluated in three stages.

(6) bag manufacturability

When using a filter to obtain a palate for extracting palatable beverages, depending on whether the filter is easy to deform, the (Class 3) filter is difficult to deform and the bag manufacturability is good, (Class 2) Normal, the (Class 1) filter Prosthesis was evaluated in three stages: easy to deform and poor in bag manufacturability.

Example 1

First, according to the method disclosed in the international publication WO2004 / 063435 pamphlet, a gloss removal agent was used as a polymerization catalyst by using 5 mmol% of titanium trimellitate (titanium compound) and 30 mmol% of triethylphosphonoacetate (phosphorus compound). Polyethylene terephthalate (melting point 257 degreeC, content of the metal element of 5.0 g / cm <3> or more of true specific gravity 0 ppm) which was not obtained was obtained. In addition, using 5 mmol% of titanium trimerate (titanium compound) and 30 mmol% of triethyl phosphonoacetate (phosphorus compound) as a polymerization catalyst, an acid component consists of terephthalic acid and isophthalic acid of the molar ratio 93/7, and glycol Copolymerized polyethylene terephthalate (content of 0 ppm of metal elements of 5.0 g / cm <3> or more of melting | fusing point 217 degreeC, specific gravity of more than 5.0 ppm) which component does not contain the gloss remover was obtained. And the said polyethylene terephthalate is arrange | positioned at a core part, Meanwhile, the said copolymerization polyethylene terephthalate is arrange | positioned at a sheath part, it supplies to a core-cis type | mold composite melt spinning apparatus, and it extends | stretches after spinning at the spinning temperature of 290 degreeC, Core-sheath polyester monofilament having a ring cross section of single yarn fineness 27 dtex in which the polyethylene terephthalate is disposed in the core portion and the copolymerized polyethylene terephthalate is disposed in the sheath portion (volume ratio of core portion and sheath portion 80:20 )

On the other hand, by using the polyethylene terephthalate, one molten spinning hole (four circular arcs per side on each side of the length center line) which is punched into the spinneret and has a shape corresponding to the filament cross-sectional shape shown in FIG. It has a cross-sectional shape which has three narrow parts per side as shown in FIG. 1 by extending | stretching and extending after passing through an exit part and three narrow parts formed between them, and spinning at a spinning temperature of 300 degreeC, The cross-sectional flatness Is 3.2, the value of the ratio (C1 / C2) in the filament cross section width is 1.2, and a polyester monofilament having a flat cross-sectional shape with a single yarn fineness of 27 dtex is obtained.

Subsequently, the core-sheath polyester monofilament having the annular cross section is disposed on the slope, and the polyester monofilament having the flat cross-sectional shape is disposed on the weft yarn to weave the fabric of the plain weave tissue. The fabric was refined by dipping in a warm bath at a temperature of 80 ° C. containing sodium carbonate, and then washed with water and dried.

Subsequently, heat treatment (215 ° C) is performed in the heated air with tension applied to the fabric to fuse all intersections of the warp and the weft of the fabric, thereby exhibiting 113 diameters / 2.54 cm and stomach density 80 as shown in FIG. A palate beverage extraction filter consisting of a plain tissue fabric having a density of 2.54 cm was obtained.

In the thus-obtained palate beverage extraction filter, the opening ratio was 56% and the softness of the texture was third grade and was excellent in softness.

Subsequently, it welded by the ultrasonic sealing method using the filter for palate extraction, and obtained the palate for extracting the palate which has a tetra shape as shown in FIG. Then, the bag containing the powder (ceramic abrasive WHITE ARANDOM WAF54 made by Sansho Abrasives Co., Ltd.) of Al ₂ O ₃ having a particle size of 250 to 355 μm as a palate is immersed in hot water to prevent leakage of the palate. As a result of evaluation, the powder was hardly leaked to the fourth grade.

In addition, both the shape retention and bag manufacturability were good in the third grade and the manufacturability of the bag.

Example 2

One melt spinning hole having a shape corresponding to the cross-sectional shape of the filament shown in Fig. 1 using the same polyethylene terephthalate as in Example 1 in the core portion and the same copolymerized polyethylene terephthalate as in Example 1 in the sheath portion (length Spinning at a spinning temperature of 290 ° C., using a core-sheath type composite melt spinning apparatus having spinnerets punched on both sides of the centerline with four circular arc bulges per side and three cuts formed therebetween) After stretching, the cross-sectional shape as shown in Fig. 1 has a cross-sectional flatness of 3.2, a value of ratio (C1 / C2) in the filament cross-sectional width is 1.2, and a flat cross-sectional shape of single yarn fineness 27dtex. Branches obtained a core-sheath polyester monofilament (volume ratio 80:20 of the core part and the sheath part). The core-sheath polyester monofilament having the flat cross-sectional shape is disposed on the warp and the weft yarn, and similarly to Example 1, after weaving a woven fabric of plain weave tissue, the woven fabric is a temperature containing sodium carbonate at 80 ° C. After refine | purifying by immersion treatment in the warm bath, it washed with water and dried.

Subsequently, heat treatment (215 ° C.) with the tension applied to the fabric in the heated air to fuse both intersections of the warp and the weft of the fabric to obtain a density of 97 density / 2.54 cm and 88 density / 2.54 cm stomach density. Eggplant was obtained a palate beverage extraction filter consisting of a plain tissue fabric.

In the palate beverage extraction filter thus obtained, the opening ratio was 46% and the softness of the texture was fourth grade and was very excellent in softness.

Subsequently, it welded by the ultrasonic sealing method using the filter for palate extraction, and obtained the palate for extracting the palate which has a tetra shape as shown in FIG. Then, the bag containing the powder (ceramic abrasive WHITE ARANDOM WAF54 made by Sansho Abrasives Co., Ltd.) of Al ₂ O ₃ having a particle diameter of 250 to 355 µm as a palate is immersed in hot water, and the leakiness of the palate is reduced. As a result of evaluation, the powder was hardly leaked to the fourth grade.

In addition, both the shape retention and bag manufacturability were good in the third grade and the manufacturability.

Example 3

By using the same polyethylene terephthalate as in Example 1 and stretching after spinning at a spin temperature of 300 ° C. using an ordinary melt spinning apparatus, a polyester monofilament having a ring cross-sectional shape of single yarn fineness of 27 dtex was obtained.

Next, the polyester monofilament which has a ring cross-sectional shape, and the core-sheath polyester monofilament (volume ratio 80:20 of a core part and a sheath part) which have the same ring cross section as Example 1 are alternately 1: 1. Arranged in an inclined manner in the array, while the polyester-based monofilament having the same flat cross-sectional shape as in Example 1 was placed in the weft yarn, and weaving the fabric of the plain weave tissue, as in Example 1, the fabric, After scouring by dipping in a warm bath at a temperature of 80 ° C. containing sodium carbonate, it was washed with water and dried.

Subsequently, heat treatment (215 ° C.) with the tension applied to the fabric in the heated air to partially fuse the intersection point of the warp and the weft of the fabric to obtain a density of 113 density / 2.54 cm and 80 density / 2.54 cm stomach density. Eggplant was obtained a palate beverage extraction filter consisting of a plain tissue fabric.

In the thus-obtained palate beverage extraction filter, the opening ratio was 56% and the softness of the texture was fourth grade and was very excellent in softness.

Subsequently, it welded by the ultrasonic sealing method using the filter for preference beverage extraction, and obtained the tetra-shaped preference beverage extraction bag as shown in FIG. Then, the bag containing the powder (ceramic abrasive WHITE ARANDOM WAF54 made by Sansho Abrasives Co., Ltd.) of Al ₂ O ₃ having a particle diameter of 250 to 355 µm as a palate is immersed in hot water, and the leakiness of the palate is reduced. As a result of evaluation, the powder was hardly leaked to the fourth grade.

In addition, both the shape retention and bag manufacturability were good in the third grade and the manufacturability.

Example 4

Example 1 WHEREIN: Except changing the temperature of a heat processing to 190 degreeC, it carried out similarly to Example 1, and it is 113 diameter / 2.54cm and 80 density of the density where the intersection of the warp and weft of a fabric is not fused. A plain tissue fabric having a density of 2.55 cm was obtained.

Subsequently, the plain fabric was heat-pressed at 220 ° C. with a heat roll engraved with an oblique lattice pattern, and only the pattern part of the heat roll was partially fused at the intersection of the warp and the weft to obtain a filter for palatable beverage extraction.

In the palate beverage extraction filter thus obtained, the opening ratio was 48% and the softness of the texture was fourth grade and was very excellent in softness.

Subsequently, it welded by the ultrasonic sealing method using the filter for preference beverage extraction, and obtained the tetra-shaped preference beverage extraction bag as shown in FIG. Then, the bag containing the powder (ceramic abrasive WHITE ARANDOM WAF54 made by Sansho Abrasives Co., Ltd.) of Al ₂ O ₃ having a particle diameter of 250 to 355 µm as a palate is immersed in hot water, and the leakiness of the palate is reduced. As a result of evaluation, the powder was hardly leaked to the fourth grade.

In addition, both the shape retention and bag manufacturability were good in the third grade and the manufacturability.

Example 5

In Example 1, by changing the heat treatment temperature in heating air to 190 degreeC, it carried out similarly to Example 1 except having not fused the intersection of inclination and weft, and obtained the filter for preference beverage extraction.

In the thus-obtained palate beverage extraction filter, the opening ratio was 56% and the softness of the texture was third grade and was excellent in softness.

Subsequently, it welded by the ultrasonic sealing method using the filter for preference beverage extraction, and obtained the tetra-shaped preference beverage extraction bag as shown in FIG. Then, the bag containing the powder (ceramic abrasive WHITE ARANDOM WAF54 made by Sansho Abrasives Co., Ltd.) of Al ₂ O ₃ having a particle diameter of 250 to 355 µm as a palate is immersed in hot water, and the leakiness of the palate is reduced. As a result of evaluation, the powder was little leaked in the fourth grade.

However, when the force is applied to the fabric, it is easy to cause the job to open, and the shape retention (class 1) is slightly decreased. In addition, when the tetra-shaped beverage extraction bag is obtained, the intersection point of the warp and the weft is not fused, so that distortion and deformation in the bias direction (inclination direction) are likely to occur, and the bag manufacturability (grade 1) is slightly insufficient. did. Further, loosening occurred in the cut section.

Comparative Example 1

In Example 1, a core-sheath polyester monofilament having a ring cross section is disposed on both warp yarns and weft yarns, and has a density of 97 densities / 2.54 cm in diameter and 88 densities / 2.54 cm in stomach density. It carried out similarly to Example 1 except having obtained the filter for palatable beverage extraction which consists of a cloth.

In the palate beverage extraction filter thus obtained, the softness of the opening ratio of 67% and the texture were inferior to the first grade.

Subsequently, it welded by the ultrasonic sealing method using the filter for preference beverage extraction, and obtained the tetra-shaped preference beverage extraction bag as shown in FIG. Then, the bag containing the powder (ceramic abrasive WHITE ARANDOM WAF54 made by Sansho Abrasives Co., Ltd.) of Al ₂ O ₃ having a particle size of 250 to 355 μm as a palate is immersed in hot water to prevent leakage of the palate. As a result of evaluation, there was a slight leakage of the powder in the third grade.

In addition, both the shape retention and bag manufacturability were good in the third grade and the manufacturability.

Comparative Example 2

In Example 1, a core-sheath polyester monofilament having a ring cross section is disposed on both warp yarns and weft yarns, and has a density of 70 density / 2.54 cm and 65 density / 2.54 cm stomach density. It carried out similarly to Example 1 except having obtained the filter for palatable beverage extraction which consists of a cloth.

In the palate beverage extraction filter thus obtained, the softness of the opening ratio of 76% and the texture were inferior to the first grade.

Subsequently, it welded by the ultrasonic sealing method using the filter for preference beverage extraction, and obtained the tetra-shaped preference beverage extraction bag as shown in FIG. Then, the bag containing the powder (ceramic abrasive WHITE ARANDOM WAF54 made by Sansho Abrasives Co., Ltd.) of Al ₂ O ₃ having a particle diameter of 250 to 355 µm as a palate is immersed in hot water, and the leakiness of the palate is reduced. As a result of the evaluation, the powder was leaked to the first grade.

In addition, both the shape retention and bag manufacturability were good in the third grade and the manufacturability.

According to the present invention, there is provided a palate beverage extraction filter having a soft texture and hardly leaking palate beverage powders, and a palate for extracting palatable beverages using the palate beverage extraction filter, which have high practicality.

Claims (18)

A filter for preference beverage extraction comprising a polyester monofilament, and having a woven or knitted structure, the polyester monofilament having a flat cross-sectional shape in the polyester monofilament. The palate beverage extraction filter according to claim 1, wherein the single yarn fineness of the polyester monofilament is in the range of 10 to 60 dtex. The polyester monofilament according to claim 1, wherein in the polyester monofilament having the flat cross-sectional shape, the maximum width C1 of the length B in the longitudinal center line direction of the flat cross-sectional shape and intersecting at right angles to the longitudinal center line direction (C1). A filter for palatable beverage extraction, in which the cross-sectional flatness represented by the ratio (B / C1) to) is in the range of 2 to 6. The flat cross section of the polyester-based monofilament having the flat cross-sectional shape according to claim 1, wherein two or more convex portions are formed per one side, and the ratio to the minimum value C2 of the maximum value C1 of the width is defined. A filter for preference beverage extraction in which (C1 / C2) is in the range of 1.05 to 4.00. The palate beverage extraction filter according to claim 1, wherein the polyester monofilament having a flat cross-sectional shape is formed of polyethylene terephthalate having a melting point of 255 to 265 ° C. 2. The polyester monofilament according to claim 1, wherein in the polyester monofilament having a flat cross-sectional shape, the polyester monofilament has a core-sheath structure and the core component is made of polyethylene terephthalate having a melting point of 255 to 265 캜. And a cis component formed of polyethylene terephthalate copolymerized with isophthalic acid having a melting point of 170 to 240 ° C. The palatable beverage extraction filter of claim 1, wherein the polyester monofilament comprises a polyester monofilament having a ring cross-sectional shape as another polyester monofilament. 8. The polyester monofilament having the ring cross-sectional shape has a core-sheath structure, and the core component is formed of polyethylene terephthalate having a melting point of 255 to 265 ° C, while the sheath component has a melting point. A palate beverage extraction filter formed of polyethylene terephthalate copolymerized with isophthalic acid in the range of 170 to 240 ° C. The palatable beverage extraction filter of claim 1, wherein the polyester-based monofilament does not contain a gloss remover. The palatable beverage extraction filter according to claim 1, wherein the polyester monofilament has a content of a metal element of 5.0 g / cm 3 or more in true specific gravity of 0.5 ppm by weight or less. The palate beverage extraction filter according to claim 1, wherein the filter has a textile structure and has a warp density in the range of 30 to 300 pieces / 2.54 cm and a weft density in the range of 30 to 300 pieces / 2.54 cm. The palatable beverage extraction filter of claim 1, wherein the palate has a plain weave texture. The filter for preference beverage extraction according to claim 1, wherein the filter has a mesh knitted structure. The palate beverage extraction filter according to claim 1, wherein the aperture ratio is in the range of 40 to 75%. The palatable beverage extraction filter according to claim 1, wherein at least a portion of the intersection portion of the filaments constituting the filter is fused in the palate beverage extraction filter. 16. The palatable beverage extraction filter of claim 15, wherein the intersections of the filaments are fused in a lattice pattern. A palate for extracting palatable beverages prepared using the palate extracting filter according to any one of claims 1 to 14. 18. The palatable beverage extraction bag of claim 17, having a tetra shape.

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