JPWO2017057536A1 - Molded product for passing caffeine-containing beverage and method for producing the same - Google Patents

Abstract

An object of the present invention is to provide a molded article for liquid passage that can reduce the caffeine content without impairing the flavor of the caffeine-containing beverage, and a method for producing the same. According to the present invention, a molded product for passing a caffeine-containing beverage, comprising pulp, a paper strength enhancer, and an adsorbent, and a dispersion containing pulp, a paper strength enhancer, and an adsorbent Is provided, and a method for producing a molded article for passing a caffeine-containing beverage is provided, which comprises a step of drying the nonwoven fabric in a wet paper state after filtration.

Description

Reference to related applications

  This application enjoys the benefit of the priority of Japanese Patent Application No. 2015-194221 (filing date: September 30, 2015), which is a preceding Japanese application, the entire disclosure of which is incorporated herein by reference. To be part of

  The present invention relates to a molded article for passing a caffeine-containing beverage and a method for producing the same, and more particularly to a non-woven fabric for a filter used for a caffeine-containing beverage and a method for producing the same.

  In recent years, the development of coffee beverages and tea beverages with reduced caffeine has been demanded due to an increase in health consciousness. For example, in packaged beverages, high-concentrated catechins-containing packaged beverages that have been blended with a low caffeine green tea extract obtained by dissolving in an ethanol / water mixture have been proposed (e.g., Patent Document 1).

  In addition, a method of selectively removing caffeine from an aqueous solution containing caffeine without affecting other components (see, for example, Patent Document 2), a low content of caffeine, a bitterness of catechins, A tea beverage (for example, see Patent Document 3) in which astringency is suppressed has been proposed.

  On the other hand, recently, opportunities to provide beverages extracted from coffee beans and tea leaves (that is, coffee beverages, tea beverages, etc.) as they are at home and in cafes are rapidly increasing. In response to this situation, methods for reducing caffeine from coffee beans and tea leaves have been developed. For example, for coffee beans, a technique for decaffeination by a technique such as a supercritical carbon dioxide extraction method is known (for example, Patent Document 4). For tea leaves, techniques such as watering fresh tea leaves and a supercritical carbon dioxide extraction method are known (see, for example, Patent Document 5).

JP 2005-176760 A JP-A-6-142405 Japanese Patent Laid-Open No. 10-4919 Japanese Patent Laid-Open No. 5-219898 JP 2006-296355 A

  However, when caffeine is reduced from coffee beans or tea leaves, there is a problem that the original flavor of coffee or tea is impaired.

  An object of this invention is to provide the molded object for liquid flow which can reduce caffeine content, without impairing the flavor of a caffeine containing drink.

  When the present inventors passed a caffeine-containing beverage through a molded article such as a nonwoven fabric comprising pulp, a paper strength enhancer, and an adsorbent, the liquid permeability and durability of the molded article, It was found that the caffeine content can be reduced without impairing the flavor of the caffeine-containing beverage. The present invention is based on these findings.

That is, according to the present invention, the following inventions are provided.
[1] A molded article for passing a caffeine-containing beverage, comprising pulp, a paper strength enhancer, and an adsorbent.
[2] The molded article for liquid flow according to [1], wherein the caffeine removal rate is 0.1 or more.
[3] The molded article for liquid passage according to [1] or [2], wherein a permeation rate (permeation rate in ion exchange water at 80 ° C.) is 0.25 to 2.25 s / ml.
[4] The molded article for liquid passage according to any one of [1] to [3], wherein the air permeability is 700.0 μm / Pa · s or less.
[5] The molded article for liquid passage according to any one of [1] to [4], wherein the basis weight is 20.0 to 450.0 g / m ² .
[6] The molded article for liquid flow according to any one of [1] to [5], which has a thickness of 0.1 to 5.0 mm or less.
[7] The molded article for liquid flow according to any one of [1] to [6], wherein the adsorbent is activated carbon.
[8] The molded article for liquid passage according to any one of [1] to [7], wherein the caffeine-containing beverage is a coffee beverage.
[9] The molded article for liquid flow according to any one of [1] to [8], wherein the pulp is wood pulp.
[10] The liquid-permeable molded article according to any one of [1] to [9], wherein the paper strength enhancer is a fibrillated fiber.
[11] The molded article for liquid passage according to [10], wherein the fibrillated fiber is a synthetic fiber or a refined wood product.
[12] The molded article for liquid flow according to any one of [1] to [11], wherein a mass ratio of the pulp and paper strength enhancer to the adsorbent is 1: 0.1 to 1: 4.5. .
[13] The molded article for liquid flow according to any one of [1] to [12], wherein a mass ratio of the pulp and the paper strength enhancer is 1: 0.01 to 1: 1.
[14] Any one of the above [1] to [13], comprising a step of filtering a dispersion containing pulp, a paper strength enhancer, and an adsorbent and drying the nonwoven fabric in a wet paper state after filtration. The manufacturing method of the molded object for liquid flow as described in any one of.
[15] A molded article for passing a caffeine-containing beverage produced by filtering a dispersion containing pulp, a paper strength enhancer, and an adsorbent and drying the nonwoven fabric in a wet paper state after filtration.

  The molded product for passing a caffeine-containing beverage of the present invention can reduce the caffeine content without impairing the fluid permeability and strength of the molded product and the flavor of the caffeine-containing beverage. Therefore, according to the molded article for passing a caffeine-containing beverage of the present invention, it is advantageous in that a coffee beverage or tea beverage with reduced caffeine can be easily realized at home or in a cafe.

Detailed description of the invention

  Although the form is not restrict | limited as long as it can be used for the caffeine reduction of a caffeine containing drink, the liquid-permeable molded article of this invention can be provided with the form of a nonwoven fabric, a cartridge, and a filter, for example. The liquid-permeable molded product of the present invention can also be used for extraction of caffeine-containing beverages. In that case, the molded product of the present invention can be provided as a nonwoven fabric for filters of caffeine-containing beverages.

  The “pulp” used as a raw material for the molded article for passing a caffeine-containing beverage of the present invention is not particularly limited as long as it can be used as a paper material. Pulp is classified according to its raw material, and may be wood pulp (wood fiber) or non-wood pulp. Examples of the wood pulp include softwood pulp, hardwood pulp, or a mixture thereof. For example, sulfite pulp (manufactured by Nippon Paper Industries Co., Ltd.) can be used. Non-wood pulp includes cotton linter pulp and hemp pulp. In addition, since the intensity | strength is inadequate only with a pulp sheet, this point can be solved by combining with the paper strength enhancer mentioned later.

  The pulp used in the present invention is not particularly limited as long as it is refined through a normal pulp manufacturing process. Pulp is classified according to its production method, and any of chemical pulp (for example, kraft pulp and sulfite pulp), semi-chemical pulp and mechanical pulp (for example, groundwood pulp) can be used in the present invention.

  The pulp used in the present invention is preferably made of fibers having an average diameter of 10 to 200 μm and an average fiber length of 0.5 to 5.5 mm. Here, the average diameter means the thickness of the fiber. In addition, since the pulp fiber which passes through a chemical treatment process, an enzyme hydrolysis process, and a mechanical treatment process contains many things with an average diameter and average fiber length less than the said numerical range, in this invention, it does not pass through these treatment processes. It is preferable to use the obtained pulp.

  In the present invention, the “paper strength enhancer” means a fiber that exhibits a fine particle capturing effect and can be carried on a molded body without dropping the adsorbent. Such fibers include fibrillated fibers, and specifically include synthetic fibers and refined wood.

  Synthetic fibers include, for example, polyester fibers, polyolefin fibers, polyacrylic fibers, polyamide fibers, polyvinyl alcohol fibers, polylactic acid fibers, etc., preferably polyester fibers or polyolefin fibers. is there. Specific examples of polyolefin fibers include polyethylene resins, ethylene / methacrylic acid copolymer resins, ethylene / α-unsaturated carboxylic acid copolymer resins, ethylene / 1-butene copolymer resins, polymethylpentene resins, and acid modifications thereof. The main resin component of one or more selected from materials is one made into a fiber by a known means such as a flash method, and its form is similar to beaten wood pulp, and the fibers are branched and fibrillated. ing. Examples of commercially available synthetic fibers include SWP (registered trademark) manufactured by Mitsui Chemicals and Vipal manufactured by Toyobo.

  A wood refined product is a product made from pure plant fibers and made into a fine fiber by applying a strong mechanical shearing force by ultra-high pressure homogenizer treatment. For example, fine fiber cellulose, ground wood powder, etc. Can be mentioned. The wood refinement is preferably a fiber having an average diameter of less than 0.5 μm. When wood refinement with an extremely large surface area is mixed, the hydroxyl group of the wood fiber, which is the main raw material, and the hydroxyl group of the wood refinement are hydrogen-bonded at numerous locations, so the wood refinement functions as a binder. Then, it is considered that the manufactured molded body is in a state in which wood pulp (wood fiber) as a main raw material is bound by the refined wood, and the strength of the molded body is improved. As a commercially available woody refined product, serisch manufactured by Daicel Finechem Co., Ltd. may be mentioned.

  The “adsorbent” used as a raw material for the molded article for passing a caffeine-containing beverage of the present invention is not particularly limited as long as it has the ability to adsorb caffeine, that is, a caffeine adsorbent, for example , Activated carbon, white clay, zeolite.

  The “activated carbon” used in the present invention may be derived from a plant material or a mineral-based material, but is preferably derived from a plant material. The shape of the activated carbon is not particularly limited, but is preferably granular or powdery. The average particle size of the activated carbon is preferably 1 to 50 μm, more preferably 5 to 40 μm, and still more preferably 10 to 40 μm. As commercially available activated carbon, granular white lees LH2c and granular white lees KL manufactured by Nippon Enviro Chemicals, Y-10SF, CL-H and GS manufactured by Ajinomoto Fine Techno Co., etc. can be used.

  Examples of the “white clay” used in the present invention include acidic white clay, activated white clay, bentonite, activated bentonite, saponite, and combinations of some or all of these. Preferably, it is acid clay, activated clay, and these combination, More preferably, it is acid clay.

The acidic clay and activated clay used in the preferred embodiment of the present invention have SiO ₂ , Al ₂ O ₃ , Fe ₂ O ₃ , CaO, MgO, etc. as general chemical components, but when used in the present invention, The SiO ₂ / Al ₂ O ₃ ratio is 3 to 12, preferably 3 to 8. Further, in an acidic clay and active clay, _Fe 2 _{O 3} is 2-5 wt%, CaO is 0 to 1.5 wt%, it is preferable to use a composition that MgO contains like 1-7 wt% .

The specific surface area (m ² / g) of the acid clay and activated clay used in the present invention is 50 m ² / g or more and less than 150 m ² / g in the case of acid clay, and 70 m ² / g or more and 300 m in the case of activated clay. Those less than ² / g are preferred.

Among the clays used in the present invention, preferred are acid clays having a specific surface area (m ² / g) of 50 or more and less than 150 and a SiO ₂ / Al ₂ O ₃ ratio of 3 or more and less than 8, Examples include activated clay with a surface area (m ² / g) of 200 or more and less than 300 and a SiO ₂ / Al ₂ O ₃ ratio of 3 or more and less than 11.

  Examples of preferred acidic clay as described above include commercial products such as Mizuka Ace # 20, Mizuka Ace # 200, Mizuka Ace # 400, Mizuka Ace # 600, and Mizrite (manufactured by Mizusawa Chemical Co., Ltd.). Moreover, as preferable active clay as described above, for example, commercially available products such as Galeon Earth NVZ, Galeon Earth V2, and Galeon Earth NF2 (manufactured by Mizusawa Chemical Co., Ltd.) can be used. Commercially available bentonite such as Clarit 100G, Clarit 125G, and Tonsil 531N (manufactured by Zude Chemie Catalysts) can also be used as white clay.

  The molded article for liquid passage of the present invention can be characterized by a caffeine removal rate. Here, the “caffeine removal rate” means the ratio of the amount of caffeine decreased in the caffeine aqueous solution after the passage to the caffeine content of the caffeine aqueous solution before the passage. The caffeine removal rate is preferably 0.1 or more, more preferably 0.2 or more, and further preferably 0.5 or more. The caffeine content can be measured by a high performance liquid chromatography method.

  Since the caffeine removal rate correlates with the amount of adsorbent contained in the molded article for liquid passage, those skilled in the art should adjust the ratio of adsorbent to pulp and paper strength enhancer with reference to the examples described later. Can be set within the above numerical range. For example, the mass ratio of the pulp and paper strength enhancer to the adsorbent can be adjusted to 1: 0.10 to 1: 4.5, preferably 1: 0.50 to 1: 3.9, more preferably Is 1: 0.8 to 1: 2.4.

  The molded article for liquid passage of the present invention can be characterized by a speed (permeation speed) when 80 ° C. ion exchange water is permeated. The permeation rate is preferably in the range of 0.25 to 2.25 s / ml, more preferably in the range of 0.31 to 1.29 s / ml. The permeation rate can be measured according to the conditions described in Examples below.

  The molded article for liquid passage of the present invention can be characterized by the air flow rate (air permeability) under the conditions defined in JIS P-18117-2009. The air permeability is preferably in the range of 700.0 μm / Pa · s or less.

  Since the transmission rate correlates with the amount of the paper strength enhancer relative to the pulp, those skilled in the art can adjust the transmission rate within the above numerical range by adjusting the ratio of the pulp and the paper strength enhancer with reference to the examples described later. Can be set. Further, since the air permeability correlates with the amount of the paper strength enhancer relative to the pulp, those skilled in the art can adjust the air permeability by adjusting the ratio of the pulp and the paper strength enhancer with reference to the examples described later. Can be set within the numerical range. For example, the mass ratio of pulp and paper strength enhancer can be adjusted to 1: 0.01 to 1: 1, preferably 1: 0.07 to 1: 0.6, more preferably 1: 0.17 to 1: 0.32.

The basis weight of the molded body for liquid passage of the present invention is preferably in the range of 20.0 to 450.0 g / m ² , more preferably in the range of 120.0 to 400.0 g / m ² .

  When the molded article for liquid passage of the present invention is provided as a non-woven fabric for a filter, the thickness is preferably 0.1 to 5.0 mm, more preferably 0.2 to 1.0 mm.

  The molded article for liquid passage of the present invention may contain an additive added to the pulp product. Examples of such an additive include a colorant, an antioxidant, a heat stabilizer, and an ultraviolet absorber. And stabilizers such as agents.

  The molded body for liquid flow of the present invention can cover the front surface and / or the back surface with a nonwoven fabric. By performing such processing, even when the liquid-permeable molded article of the present invention is used as a non-woven fabric for a filter, it is possible to more reliably prevent the adsorbent from dropping into the caffeine-containing beverage.

  The method for producing the molded article for liquid passage according to the present invention is not particularly limited. For example, pulp, paper strength enhancer, and adsorbent can be mixed and produced by paper making such as wet paper making or dry paper making. . Hereinafter, the case where the molded article for liquid flow is provided as a nonwoven fabric for a filter will be described as an example.

  The wet papermaking can be performed by a usual method, and for example, the papermaking can be carried out using a wet papermaking machine equipped with a manual papermaking machine or a perforated plate. Dry papermaking can also be performed by a method commonly used in the art, and for example, papermaking can be performed using an airlaid manufacturing method, a card manufacturing method, or the like.

  The molded article for liquid passage of the present invention can be produced as follows. That is, a nonwoven fabric can be produced by wet papermaking using a dispersion containing papermaking raw materials. The dispersion liquid is a liquid containing a papermaking raw material containing at least pulp, a paper strength enhancer, and an adsorbent and a dispersion medium. As the dispersion medium, water or an organic solvent can be used, but only water is preferable from the viewpoints of handleability, cost, and safety. When using an organic solvent, it is preferable to use together with water, and ethanol is mentioned as an organic solvent used together with water. The non-woven fabric for a filter of the present invention can be produced by filtering the dispersion and drying the non-woven fabric in the wet paper state after the filtration.

  The produced non-woven fabric for filter can be further processed according to the beverage to be extracted. For example, when the filter nonwoven fabric of the present invention is used for coffee extraction, the produced nonwoven fabric can be processed into a filter shape that can be attached to and detached from a coffee extraction dripper. Alternatively, when the filter nonwoven fabric of the present invention is used in a coffee or tea-based beverage bending machine, the produced nonwoven fabric is processed into a certain width and wound into a roll shape, and the roll nonwoven fabric is used in the apparatus. It is possible to continuously extract coffee and tea beverages by attaching them to the. In this case, it is possible to provide ordinary beverages and caffeine-reduced beverages that are not reduced in caffeine according to the user's preference without separately preparing coffee beans and tea leaves with reduced caffeine. It is advantageous in that various beverages can be provided while being realized.

  The molded article for liquid passage of the present invention can be used as a non-woven fabric for a filter for extracting a caffeine-containing beverage. Caffeine-containing beverages include coffee and tea beverages. When extracting coffee, coffee beans pulverized by a coffee mill (grinder) can be used. Moreover, when extracting a tea drink, various tea leaves can be used for extraction as they are.

  The type of coffee beans extracted using the molded article for liquid passage of the present invention is not particularly limited, and examples thereof include Brazil, Colombia, Tanzania, Mocha, Kilimangelo, Mandelin, Blue Mountain, and one or two of these. You may blend and use a seed or more. Examples of coffee bean species include arabica species and Robusta species, and are preferably arabica species from the viewpoint of flavor. One kind of coffee beans may be used, or a plurality of kinds may be blended. The method of making coffee beans by roasting coffee beans is not particularly limited, and the roasting temperature and roasting environment are not limited. Examples of the roasting method include a direct fire method, a hot air method, and a semi-hot air method. The roasting degree of the roasted coffee is not particularly limited, and for example, any of light, cinnamon, medium, high, city, full city, French, and Italian may be used. The roasting degree of roasted coffee may be expressed using the L value, and those skilled in the art can appropriately select the L value of the beans. The L value can be measured, for example, by a color difference meter manufactured by Nippon Denshoku Industries Co., Ltd. In addition, you may mix multiple types of coffee beans from which a roasting degree differs.

The tea leaves extracted using the molded article for liquid passage of the present invention are not particularly limited, but tea leaves belonging to Camellia sinensis can be used, and green tea leaves such as sencha, gyokuro, matcha, kettle roasted tea, bancha and hojicha Not only non-fermented tea such as, but also semi-fermented tea such as oolong tea, fermented tea such as black tea, post-fermented tea such as puer tea, and the like can be used. The tea leaves used for producing the tea beverage of the present invention are not particularly limited as long as the effects of the present invention are exhibited, but green tea leaves, oolong tea leaves and black tea leaves are preferable.

  Hereinafter, the present invention will be described more specifically by way of examples. However, the technical scope of the present invention is not limited to these examples. In Examples, “%” means “% by mass” unless otherwise specified.

The methods and evaluations in the examples and comparative examples were performed according to the following methods.
Air Permeability According to JIS P-18117-2009, air volume of Gurley standard type densometer (B type) is used, and air of a constant volume passes through the paper in an environment of air temperature 23 ° C and relative humidity 50%. The measurement time (s) was measured. The ISO air permeability was calculated by the following formula.
p = 135.3 / t
(In the above formula, p represents ISO air permeability [μm / (Pa · s)], and t represents the average value (s) of the time for which 100 ml of air (volume indicated by the inner cylinder marked line) passes. Represents.)

A non-woven fabric for a filter serving as a control for the coffee extraction method was cut into a circle having a diameter of 60 mm and placed in an aero press extractor (registered trademark) manufactured by Air Lobby Co., Ltd. 100 g of a coffee extract obtained by extracting 30 g of Brazilian coffee beans (L value 17.0) with 450 ml of hot water at 95 ° C. for 5 minutes was poured from the top of the aeropress extractor to perform extraction.

Ion-exchanged water permeation rate Ion-exchanged water at 80 ° C was poured into an aeropress extractor, and the time taken to pass 50 g or 80 g of ion-exchanged water was measured. (S / ml). In addition, when equivalent experiment was implemented also in the coffee extract, the tendency similar to the result of ion-exchange water was shown.

Filter durability The durability of the filter after passing was evaluated by six trained panelists. The evaluation criteria are as shown below. In addition, let the durability of the filter before liquid flow be a control, and make this 5 points.

[Filter durability evaluation criteria]
5 points: No damage when removed from the aeropress extractor 4 points: Partially damaged when removed from the aeropress extractor after extraction, but does not affect extraction 3 points: Partially damaged late in extraction, extreme Small amount of coffee powder is expected to flow out 2 points: Partially damaged at the beginning of extraction, small amount of coffee powder is expected to flow out 1 point: Damaged at the beginning of extraction, large amount of coffee powder is expected to flow out

The average value of the evaluation scores of five panelists was calculated, and this was further divided into levels according to the following evaluation criteria. Durability evaluation criteria are as follows: A is an extraction filter with no handling problems, B, C, D in the order of breakage when removed from the aeropress extractor, coffee powder spill, etc. Inconvenience in handling will increase.
A: 4.5 points or more in a 5 step evaluation B: 3.5 points or more and less than 4.5 points in a 5 step evaluation C: 2.5 points or more and less than 3.5 points in a 5 step evaluation D: 2 in a 5 step evaluation Less than 5 points

Sensory test for coffee The sensory evaluation of the flavor of the coffee solution after passing through the filter was conducted by six trained panelists. The evaluation criteria are as shown below. In addition, let the flavor before filter passage be a control, and let this be 5 points | pieces.
[Sensory evaluation criteria]
5 points: the same flavor as before passing through the filter 4 points: almost the same as the flavor before passing through the filter 3 points: slightly inferior to the flavor before passing through the filter 2 points: before passing through the filter Clearly inferior to flavor 1 point: far inferior to flavor before passing through the filter

The average value of the evaluation scores of 6 panelists was calculated, and this was further divided into levels according to the following evaluation criteria. The evaluation criteria of the flavor are as follows: A is a flavor almost equivalent to the flavor of the coffee not treated with the molded product, and according to the order of B, C, D, the control (coffee not treated with the molded product) ) Will increase the flavor change.
A: 4.5 points or more in a 5 step evaluation B: 3.5 points or more and less than 4.5 points in a 5 step evaluation C: 2.5 points or more and less than 3.5 points in a 5 step evaluation D: 2 in a 5 step evaluation Less than 5 points

Method for Measuring Caffeine Content The caffeine content in the coffee solution was analyzed according to the following procedure.

  The coffee solution was filtered through a membrane filter (DISMIC hydrophilic PTFE, 0.45 μm, manufactured by Advantech) and then subjected to high performance liquid chromatography (HPLC) under the HPLC analysis conditions shown in Table 1 to quantify the caffeine content.

Example 1: Influence of the amount of adsorbent on the nonwoven fabric for extraction filter (1) Preparation of the nonwoven fabric for extraction filter A mixture of pulp, paper strength enhancer, and adsorbent in the blending amounts shown in Table 2. Was used as the papermaking paper fee. As the pulp, LDPT manufactured by Nippon Paper Industries Co., Ltd., SWP (registered trademark) (E790) manufactured by Mitsui Chemicals, Inc. was used as the paper strength enhancer, and Ajinomoto Fine Techno Co., Ltd. Y-180C was used as the adsorbent.

Wet paper was formed on the wire of a square sheet machine (250 mm square) using the papermaking paper shown in Table 2, and filter paper was stacked and picked up from the wet paper. The paper wetting was squeezed and dried with an experimental cylinder dryer having a surface temperature of 100 ° C., and a non-woven fabric for extraction filter having a weight of 145.6 to 401.6 g / m ² and a thickness of 0.35 to 0.76 mm was obtained. Obtained.

(2) Evaluation of Extraction Filter Nonwoven Fabric Coffee was extracted using the extraction filter nonwoven fabric obtained in (1), and the measurement items shown in Table 3 were measured.

  The caffeine removal rate was determined by quantifying the caffeine content under the conditions described in Table 1 above using a high performance liquid chromatograph (HPLC, manufactured by JASCO Corporation). The same applies to the following embodiments.

  From the results in Table 3, it was found that the caffeine removal rate can be increased by increasing the amount of the adsorbent. In addition, it was predicted that when the amount of activated carbon was increased, the caffeine removal rate was also proportionally increased. However, as the amount of activated carbon supported increased, the caffeine removal rate was the theoretical value (the activated charcoal powdered coffee extract It was found that there was a tendency to be lower than the caffeine removal rate when it was contacted. On the other hand, increasing the amount of adsorbent did not affect the durability of the filter, but the flavor was inferior to that before passing through the filter, resulting in a lower evaluation.

Example 2: Effect of amount of pulp on nonwoven fabric for extraction filter (1) Preparation of nonwoven fabric for extraction filter Except for blending pulp, paper strength enhancer, and adsorbent as shown in Table 4, In the same manner as in Example 1, a nonwoven fabric for an extraction filter having a basis weight of 152.0 to 228.0 g / m ² and a thickness of 0.29 to 0.61 mm was obtained.

(2) Evaluation of extraction filter nonwoven fabric Coffee was extracted using the extraction filter nonwoven fabric obtained in (1), and the measurement items shown in Table 5 were measured.

  From the results shown in Table 5, it was found that the pulp contained only a predetermined amount, and it was found that increasing the amount of pulp does not significantly affect the caffeine removal rate (test sections 9 to 11).

Example 3: Effect of amount of paper strength enhancer on extraction filter nonwoven fabric (1) Preparation of extraction filter nonwoven fabric Pulp, paper strength enhancer, and adsorbent are blended as described in Table 6. Except for the above, a nonwoven fabric for an extraction filter having a weight of 128.0 to 145.6 g / m ² and a thickness of 0.26 to 0.35 mm was obtained in the same manner as in Example 1.

(2) Evaluation of extraction filter nonwoven fabric Coffee was extracted using the extraction filter nonwoven fabric obtained in (1), and the measurement items shown in Table 7 were measured.

  From the results in Table 7, it was found that the paper strength enhancer should contain a predetermined amount, and increasing the amount of the paper strength enhancer does not significantly affect the caffeine removal rate (test group 13). , 14 and 15).

Example 4: Effect of Paper Strength Enhancer Type on Extraction Filter Nonwoven Fabric (1) Preparation of Extraction Filter Nonwoven Fabric Pulp, paper strength enhancer, and adsorbent are blended as described in Table 8. Except for the above, a nonwoven fabric for extraction filter having a weight of 177.6 g / m ² and a thickness of 0.36 to 0.60 mm was obtained in the same manner as in Example 1.

  As paper strength enhancers, SWP (E790), SWP (AU690) and SWP (NL491) manufactured by Mitsui Chemicals, Vipal manufactured by Toyobo Co., Ltd., and serisch manufactured by Daicel Finechem Co., Ltd. were used. SWP (E790) is characterized by an average fiber length of 1.5 mm and a Canadian freeness of 680 cc, AU690 is characterized by a fiber length of 1.2 mm and a Canadian freeness of 680 cc, NL491 has a fiber length of 1.0 mm, Features Ian Freeness 720cc.

(2) Evaluation of extraction filter nonwoven fabric Coffee was extracted using the extraction filter nonwoven fabric obtained in (1), and the measurement items shown in Table 9 were measured.

  Test groups 16-18 and 20 showed no significant difference in caffeine removal rate, permeation rate, durability, and flavor evaluation. On the other hand, the test group 19 had a slightly high caffeine removal rate and a long permeation rate. It was suggested that the coffee extract tends to have a higher caffeine removal rate when the contact time with the filter is longer.

Example 5: Effect of Adsorbent Type on Extraction Filter Nonwoven (1) Preparation of Extraction Filter Nonwoven Except for blending pulp, paper strength enhancer, and adsorbent as described in Table 10 In the same manner as in Example 1, a nonwoven fabric for extraction filter having a weight of 177.6 g / m ² and a thickness of 0.22 to 0.39 mm was obtained.

  Commercially available products A (particle diameters 22 μm and 36 μm) and commercial products B (particle diameters 5 μm and 20 μm) were used as adsorbents.

(2) Evaluation of Extraction Filter Nonwoven Fabric Coffee was extracted using the extraction filter nonwoven fabric obtained in (1), and the measurement items shown in Table 11 were measured.

  From the above test results, it was shown that the non-woven fabric for filter of the present invention has a predetermined effect even when activated carbons having different particle sizes and types are used as the adsorbent.

Comparative Example 1
Coffee was extracted using products containing activated carbon commercially available for deodorization and water purification, and the effects on permeation time, caffeine removal rate, durability, and flavor were evaluated. The products used for the evaluation are as follows.
101: NMP-WU manufactured by Unitika Trading
102: Activated charcoal paper sheet 103 manufactured by Mizusumi Shoten Co., Ltd .: Bincho charcoal sheet 104 manufactured by the ancient flame company MCE manufactured by Loki Techno Co., Ltd.

  Coffee was extracted using the filter, and the items shown in Table 12 were measured or evaluated.

  As a result, it was confirmed that none of the products achieved satisfactory results with at least one evaluation item of caffeine removal rate, durability, and flavor evaluation.

Claims (14)

  A molded article for passing a caffeine-containing beverage, comprising pulp, a paper strength enhancer, and an adsorbent.   The molded article for liquid passage according to claim 1, wherein the caffeine removal rate is 0.1 or more.   The molded article for liquid passage according to claim 1 or 2, wherein a permeation speed (permeation speed in ion exchange water at 80 ° C) is 0.25 to 2.25 s / ml.   The molded article for liquid passage according to any one of claims 1 to 3, wherein the air permeability is 700.0 µm / Pa · s or less. Basis weight of 20.0~450.0g / ^{m 2,} liquid passage for molding according to any one of claims 1-4.   The molded body for liquid flow according to any one of claims 1 to 5, wherein the thickness is 0.1 to 5.0 mm or less.   The molded article for liquid passing according to any one of claims 1 to 6, wherein the adsorbent is activated carbon. The molded article for liquid passage according to any one of claims 1 to 7, wherein the caffeine-containing beverage is a coffee beverage.   The molded article for liquid flow according to any one of claims 1 to 8, wherein the pulp is wood pulp.   The molded article for liquid flow according to any one of claims 1 to 9, wherein the paper strength enhancer is a fibrillated fiber.   The molded article for liquid passing according to claim 10, wherein the fibrillated fiber is a synthetic fiber or a refined woody material.   The molded article for liquid flow according to any one of claims 1 to 11, wherein the mass ratio of the pulp and paper strength enhancer to the adsorbent is 1: 0.1 to 1: 4.5.   The molded article for liquid flow according to any one of claims 1 to 12, wherein a mass ratio of the pulp and the paper strength enhancer is 1: 0.01 to 1: 1.   The process according to any one of claims 1 to 13, comprising a step of filtering a dispersion containing pulp, a paper strength enhancer and an adsorbent, and drying the nonwoven fabric in a wet paper state after filtration. A method for producing a molded article for liquid.