JPH0813368A - Method for treating grain skin in beer and product using fibrous material obtained by the same method - Google Patents

Abstract

PURPOSE:To use grain skin in beer as a main raw material for a molded article of pulp and various paper products and to recover the grain skin in beer as used paper by making the grain skin in beer into a fibrous material under specific conditions. CONSTITUTION:Grain skin in beer as a by-product in a beer plant is treated with an alkali aqueous solution (aqueous solution of NaOH or KOH) and ash component is removed to give a soft fibrous material of grain skin. The concentration of the alkali aqueous solution is usually 0.1-1.0mol and the treating temperature is generally 50-100 deg.C to give the fibrous material of grain skin having <=20wt.% of content passing through 150 meshes and excellent dispersibility in a slurry of wood fibers, etc. Fibrillation is promoted by a beating process and entanglement between the fibrous materials of grain skin each other and that between fibrous material of grain skin and wood fibers and strength of hydrogen bond can be improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for treating husks (hereinafter referred to as beer husks) obtained from a by-product of a beer manufacturing plant, and a pulp-molded product using the fibrous material obtained by this treatment method. And various paper products, especially
It enables effective use as a packaging material that replaces foamed polyethylene and polystyrene, which have traditionally been a problem with waste pollution, and also reduces the amount of wood fiber used in conventional pulp-molded products and various paper products that use wood fiber as the main raw material. The present invention relates to a method for treating beer hulls, which can contribute to resource conservation by significantly reducing the amount, and a product using the fibrous material obtained by the method.

[0002]

2. Description of the Related Art As is well known, in a beer manufacturing factory, a huge amount of beer husks as by-products [for example, those obtained from beer lees (malt feed) and the like generated as by-products in the beer manufacturing process]. ], But this beer husk has a problem that it is very easy to rot and has a strong odor, and at present, each beer manufacturing factory has a hard time handling this beer husk. Is.

Although the above-mentioned beer hulls have the above-mentioned problems, they contain abundant fibers like rice husks and the like, and, for example, pulp-molded products using rice husks and the like. As described above, the emergence of a method that can be effectively used has been strongly demanded in the technical field.

However, in the case of beer husks, when the husks are mixed in the state of the husks, for example, in a wood pulp slurry, the entanglement of the fibers and hydrogen bonding are insufficient, so that the strength of the beer husks is simply improved or as a filler. Although it contributes to the effect, there is no improvement in burst strength, tear strength, etc., and conversely, the decrease is remarkable due to the increase in the mixing ratio of the husks, so as the main raw material of pulp mold products and various paper products in the husk state It had a problem that it could not be used.

Further, in the case of mixing in a husk state, it is difficult to uniformly disperse it in the slurry of wood pulp because the sedimentation speed and the like are different from those of wood pulp, and a large amount of foreign matter is generated when passing through the cleaner device in the raw material selection process. Is discharged to the outside of the system, resulting in a significant decrease in yield.
Had a problem.

Further, beer hulls have a very strong odor, and the known papermaking method has a problem that the odor remains in the product.

Further, since the beer hull has no entanglement of fibers, it separates and scatters even in the dehydration and drying steps of paper making, which promotes soiling of each tool and causes process and product defects. Also, the husks easily detached from the product surface of the paper and adhered to the plate in a large amount in the subsequent printing step, etc., and it was impossible to obtain a good printed finish.

As a measure for preventing the detachment of the beer hull, it may be possible to consider a binder or the like, but the most effective method is to mix the beer hull only in the middle layer of paper and to prepare the beer grain in the front and back layers. There is a method of not mixing the skin.

However, since beer hull is very hard, when the paper is tightened with a calendar roll in the paper making process, not only the target smoothness of the paper cannot be obtained, but also the paper surface has unevenness in the subsequent process. However, there is a problem in that printing defects due to

Therefore, the inventors of the present invention have known techniques, such as Japanese Patent Publication No. 56-22991 and Japanese Patent Publication No. 60-4313.
The beer husks were treated on the basis of the alkaline treatment conditions disclosed in Japanese Patent Publication No. 4-174791 and Japanese Patent Laid-Open Publication No. 4-174791, and an experiment for pulping was conducted. However, only the alkaline treatment disclosed in these known techniques was used. Found that beer hulls cannot be pulped to the extent that they can replace wood fibers.

That is, it is important for the beer hull fibrous material which can replace wood fibers to be effective in fibrillation in the subsequent beating step. For that purpose, the molar concentration of the alkaline aqueous solution, the treatment temperature and the treatment are required. If the fibrous material is not a fibrous material that has been treated so that the three conditions of the ash content of the subsequent fibrous material fall within the specific range, the entanglement between the fibrous materials or the fibrous material and the wood fiber, etc. and hydrogen in the next step. It was found that proper beating for improving the bond strength was not possible. Furthermore, it has been found that it is possible to greatly expand the field of application of beer husks by using the fibrous material obtained by the treatment in an appropriate range.

The present invention was devised based on such knowledge.

[0013]

Means for Solving the Problems That is, according to the present invention, a soft bark fiber is obtained by decalcifying hard solid beer bark by treating with an alkaline aqueous solution (for example, sodium hydroxide, potassium hydroxide, etc.). By forming a fibrous material, the dispersibility of a wood fiber or the like in a slurry is solved, and by further adding a beating step, the fibrillation of the husk fibrous material is promoted, and the husk fibrous materials are Alternatively, the entanglement of the husk fibrous material with wood fibers and the like and the hydrogen bond strength were improved to improve various expression strengths.

The fibrous material obtained by the above treatment can be used as a main raw material for pulp molded products and various paper products. When it is mixed with a pulp molded product, it can be mixed up to a ratio of 90% by weight with respect to the weight of the pulp molded product, and in the case of a paper product, up to 80% by weight with respect to the weight of the paper product. %, But if strength is important, it is preferable to mix up to a ratio of 50% by weight.

By the way, in order to make the above-mentioned hard solid beer hull into a fibrous substance, a mechanical treatment test by a refiner of the beer hull which has not been treated according to the present invention was carried out, and as a result, a fibrous substance was obtained. Can hardly be obtained, and most of the husks become fine particles, which adversely affects the moldability of pulp-molded products and various paper products.As such, they remain the main raw materials for the pulp-molded products and various paper products of the present invention. It turns out that it cannot happen.

The reason why the beer hull is miniaturized is that the beer hull contains a hard and brittle silica component which occupies most of the ash content (content = 4 to 6% by weight) of the beer hull. I understand.

Also, in the result of conducting the blasting treatment test under high temperature and high pressure, it was also found that a large amount of fine grain of the husk was generated, which adversely affected the formability of pulp molded products and various paper products. .

Further, as a result of conducting chemical and semi-chemical digestion treatment tests under high temperature and high pressure, the fiber length distribution (JIS P-8207) shows that very small fibrous material with 150 mesh passing is 50% by weight or more. More things,
Since the strength is significantly weakened, it was found that this also adversely affects the formability and strength of pulp-molded products and various paper products. It should be noted that the normal high-yield pulp passing through 150 mesh is about 10% by weight.

As a result of repeating various experiments based on these experimental results, in order to make a hard beer husk of a solid solid into a soft husk fibrous substance, in various molar aqueous alkali solutions, and As a result of carrying out the treatment test at 50 to 100 ° C., the treatment in an alkali aqueous solution of 0.1 to 1.0 molar concentration is most suitable for fibrillating the fibrous substance in the next beating step. It was found that length and uniformity were obtained. Incidentally, the treatment in an alkaline aqueous solution with a concentration of less than 0.1 molar concentration results in insufficient decalcification, resulting in insufficient softness of the fibrous material, and in the next beating step, the fibrous material is more finely divided than fibrillated. Acceleration was observed, and the same tendency as in the case of the chemical and semi-chemical digestion treatments was observed in the treatment in the alkaline aqueous solution exceeding 1.0 molar concentration.

As described above, the soft husk fibrous material obtained by the treatment in the 0.1 to 1.0 molar aqueous alkali solution has a content of 150 mesh of 20% by weight or less, which is the beating apparatus. The fibrillation can be promoted, and the entanglement and hydrogen bonding between the fibrous materials or the fibrous materials, which are the main raw material of the pulp molded product or the paper product of the present invention, or the wood fiber, etc., can be greatly improved. In particular, in the case of pulp molded products, it is desirable in terms of quality to treat them in an alkaline aqueous solution of 0.3 to 1.0 molar concentration,
Further, in the case of a paper product arranged in the middle layer of corrugated cardboard, even if it is treated with a 0.1 molar aqueous alkali solution,
It turns out that it can be used sufficiently.

Further, it was found that the beating degree for improving various expression strengths is 150 to 650 cc in Canadian Standard Freeness, but the optimum range is 300 cc to 500 cc. In the case of a pulp molded product, if the Canadian Standard Freeness is less than 300 cc, dehydration unevenness in the thickness direction will occur and water drainage will be poor, which will adversely affect the moldability and productivity of the pulp molded product.
In the case of paper products, if the Canadian Standard Freeness is less than 150 cc, the productivity resulting from the papermaking dehydration process will be adversely affected, and if the Canadian Standard Freeness exceeds 650 cc, the fibrillation of the fibrous material will be insufficient. There is little improvement in various expression strengths due to the above, and it cannot be used as a main raw material of the pulp mold products and paper products of the present invention.

The soft husk fibrous material beaten as described above is filled in a water-permeable mold in the form of a slurry of the fibrous material alone or a slurry in which wood fibers and the like are mixed and subjected to a vacuum dehydration step. After that, the pulp mold product or the paper product of the present invention is subjected to a so-called pulp mold product manufacturing process or a known paper making process of drying or pressing / drying, and the mixing ratio of the husk fibrous material is a pulp mold product. In the case of, the maximum amount is 90% by weight, and in the case of paper products, the maximum amount is 80% by weight. This is because when the mixing ratio exceeds the above respective weight%, the production yield of pulp molded products or paper products decreases due to the length limit or strength limit of the husk fibrous material.

According to the present invention, the pulp-molded product obtained by the above-mentioned treatment is used as a packaging support member for preventing damages in the handling of electric appliances, parts thereof, precision instruments and parts thereof, glass, cans, plastics, etc. -It is most suitable as a cushioning material and a packaging material, or as a packaging material for packaging foods such as marine products, agricultural products and processed products thereof.

Further, in the present invention, the paper product obtained by the above-mentioned treatment is a sanitary paper which is required to have a water absorbing function such as a paper towel used in a kitchen, a washroom, a bathroom, a toilet, etc., equipment, agricultural products, marine products, and It is used for packaging materials such as processed products, and especially compressive strength (JIS P-812
It is most suitable as a corrugated cardboard base paper for which 6) is required, or a packaging paper used for a paper board, a carrying bag, an envelope, and the like that are required to have good cosmetic properties and printability.

[0025]

As described above, according to the method for treating beer husks according to the present invention, beer husks obtained from a by-product of a beer factory are expanded polyethylene and polystyrene, which have been shunned by garbage pollution. It can be effectively used as a main raw material for pulp-molded products and various paper products that are attracting attention as an alternative to wood fiber, that is, as a substitute fiber for wood fiber, and can make a significant contribution to the effective use of global resources and nature conservation. it can.

Of course, the pulp-molded product or paper product of the present invention obtained by the above-mentioned treatment method can be recovered as waste paper, like the conventional pulp-molded product or paper product mainly made of wood fiber, This can be reused as a pulp mold or as a waste paper raw material for papermaking.

Embodiments of the present invention will be described below.

[0028]

[Example 1] 6 kg of beer hulls obtained from a by-product of a beer manufacturing plant were prepared in an absolute dry weight of 0 mol, 0.1 mol, 0.3 mol, 0.5 mol. Six kinds of alkaline aqueous solutions (sodium hydroxide) having a concentration, 1.0 molar concentration and 1.5 molar concentration were prepared respectively.

First, each 1 kg of beer hulls was placed in a rotary autoclave, and the aqueous alkali solution having each of the above molar concentrations was poured into each at a liquid ratio of 7 to 90 ° C.
After treating for 0 minutes and washing to pH around 8, the ash content (JIS P-8204) and the fiber length (JIS P-
8207) was measured. Table 1 shows the results.

The fibrous material obtained by the above treatment was beaten with a Niagara beater having a capacity of 10 liters to prepare a Canadian Standard Freeness of 450 cc.

The fibrous material thus prepared was blended with 30% by weight of each fibrous material treated with a molar concentration and 70% by weight of wood fiber to prepare a hand-made sheet having a basis weight of 120 g / m ² (JIS P-8).
209). The burst strength (JISP-8112) and compressive strength (JIS P-8126) of each of these hand-made sheets were measured, and the strength ratio (%) divided by the strength of the hand-made sheet made of 100% by weight wood fiber as a blank was calculated. It shows in Table 1.

[0032]

[Table 1]

As is clear from Table 1 above, the 0 molar aqueous alkali solution had an extremely low strength which was judged to be difficult to use as a substitute for wood fiber. In addition, in a 1.5 molar alkaline aqueous solution, 15
Since there were so many short fibrous materials that passed through 0 mesh, it was impossible to prepare them in the subsequent beating step for the purpose of fibrillating the fibrous materials.

[0034]

Example 2 From the results obtained in Example 1 above, here, a 0.5 molar alkaline aqueous solution was fixed and the treatment temperature was changed to 30 ° C., 50 ° C., 80 ° C., 100 ° C., 130 ° C. It was The amount of beer hull, liquid ratio, treatment time, washing, etc. were carried out under the same conditions as in Example 1 above.
ISP-8204) and fiber length (JIS P-82)
07) was measured. The results are shown in Table 2.

The fibrous material obtained by the above treatment was beaten with a Niagara beater having a capacity of 10 liters to prepare a Canadian Standard Freeness of 450 cc.

The fibrous material thus prepared was blended with 30% by weight of fibrous material and 70% by weight of wood fiber treated under various temperature conditions to prepare a hand-made sheet having a basis weight of 120 g / m ² (JIS P-
8209). The burst strength (JIS P-8112) and compressive strength (JIS P-8126) of each of these hand-made sheets were measured, and hand-made sheets (J
Table 2 shows the intensity ratio (%) divided by the intensity of the apparatus defined by ISP-8209).

[0037]

[Table 2]

As is clear from Table 2 above, the treatment temperature is 3
It can be seen that at 0 ° C, there is a problem in strength when used as a substitute for wood fiber. Also, at a processing temperature of 130 ° C,
The number of short fibrous materials passing through 150 mesh was extremely large, and it was impossible to prepare the fibrous material in the subsequent beating step for the purpose of fibrillation.

Therefore, as is clear from Examples 1 and 2, it is important to obtain more effective fibrillation in the beating step in order to obtain a fibrous material which can replace wood fibers. As a result, it was found that the treatment conditions of the pretreatment step include appropriate molar concentration aqueous alkali solutions, treatment temperatures, and appropriate ranges of ash content after alkali treatment.

[0040]

[Example 3] Beer husks obtained from a by-product of a beer manufacturing plant were treated at 90 ° C in a 0.5 molar alkaline aqueous solution.
The fibrous material obtained by treating for 120 minutes was beaten to 450 cc with Canadian Standard Freeness, and then fibrous material 30 / wood fiber 70, fibrous material 60 / wood fiber 40, and fibrous material 90 / A slurry was prepared by mixing the wood fibers 10 in respective weight percentages.

Each slurry thus obtained is filled in a water-permeable mold, and subjected to a dewatering process under reduced pressure, followed by pressing and drying to produce a pulp mold product.
Dimensions are 13 cm x 10 cm, bottom dimensions are 7 cm x 4 c
m, depth 5 cm, weight 16 g (per piece) made tray container, its moldability and strength (burst strength = JIS
A sample having a width of -8112 and a stiffness of 1 inch was measured with a TABER stiffness tester), and the results are shown in Table 3. In addition, in Table 3, the measurement of 100% by weight of wood fiber was also carried out by the same method, and the results of the comparative example (blank) are also shown. Further, in the same table, the terms “A side”, “B side”, “C side”, “D side” and “E side” indicate measured data values on the respective face portions of the tray shown in FIG. 1.

[0042]

[Table 3]

As is clear from Table 3, the accuracy of weight and thickness is comparable to 100% by weight of wood fiber. Further, regarding the strength (kowasa), no problem was found at all the compounding ratios, but the bursting strength was lowered by increasing the mixing ratio of the fibrous material. This indicates the limit of the strength of the fibrous material itself, and can be used without problems in a tray container of the size of this embodiment. still,
It should be additionally noted that the pulp-molded product of 100% by weight of wood fiber used as the comparative example (blank) this time uses unbleached kraft pulp of softwood and is the strongest wood fiber.

[0044]

[Example 4] Beer husks obtained from a by-product of a beer manufacturing plant were treated at 90 ° C / 1 in a 0.5 molar alkaline aqueous solution.
The fibrous material obtained by treating for 20 minutes was beaten to 450 cc with Canadian Standard Freeness, and then fibrous material 5 / wood fiber 95 and fibrous material 10 / wood fiber 90
And fibrous material 20 / wood fiber 80, fibrous material 30 / wood fiber 70, fibrous material 40 / wood fiber 60 and fibrous material 50 / wood fiber 50 are mixed at respective weight percentages to prepare a slurry. did.

On the other hand, as a comparative example (blank), beer husks obtained from a by-product of a beer manufacturing plant and not subjected to the treatment according to the present invention were mechanically treated with a refiner, and then husks 5 / wood fibers were used. A slurry was also prepared in which 95 and each of the husks 10 and the wood fibers 90 and the husks 20 and the wood fibers 80 were mixed by weight%. Using each of the slurries thus obtained, 120 g / m ² of hand-made sheet (JI
Supple strength (JIS-P8112) / compressive strength (JIS-P)
8126) was measured and the results are shown in Table 4.

[0046]

[Table 4]

As is clear from Table 4, the hand-made sheet using the fibrous material obtained by the treatment method of the present invention is good even if the ratio of fibrous material to wood fiber is 50% by weight. Although the strength is retained, in one comparative example (blank), the strength is already largely reduced at the ratio of the husk 20 and the wood fiber of 80% by weight. As is clear from this, particularly for corrugated cardboard base papers and the like that require compressive strength (JIS P-8126), good strength can be obtained by using the fibrous material of the present invention.

[0048]

[Example 5] Beer husks obtained from a by-product of a beer manufacturing plant were treated at 90 ° C / 1 in a 0.5 molar alkaline aqueous solution.
The fibrous material obtained by treating for 20 minutes was beaten to 450 cc with Canadian Standard Freeness, and then paperboard mixed with fibrous material 5 and wood fiber 95% by weight (specified in JIS P-8209). Machine) and a beer hull obtained from a by-product of a beer manufacturing plant are mechanically processed by a refiner, and then mixed with 5% of hull and 95% by weight of wood fiber (by a device specified in JIS P-8209). ) And the comparative example (blank) at a temperature of 2
When left in an atmosphere of 8 ° C. and a humidity of 90% for 12 days, the alkali-treated paperboard of the present invention did not have any mold, whereas the blank had a mold.

As is clear from this, it was proved that the paper product mixed with the fibrous material obtained by the treatment method of the present invention has excellent long-term storability. Of course, the same applies to pulp-molded products.

[0050]

Example 6 Beer hulls obtained from a by-product of a beer manufacturing plant, which have not been treated according to the present invention, are mechanically treated with a refiner, and then, the hulls 5 and 95% by weight of raw materials in a corrugated cardboard base paper, grain 60% basis weight with each ratio of 10% of raw materials in the hide 10 and the raw paper for corrugated board, 80% by weight of the raw material in 20 of corrugated baseboard and 100% by weight of the raw material in corrugated board.
/ M ^{2 hand-made} sheet (by an apparatus specified in JIS P-8209) was prepared, put in a synthetic resin bottle in an air-dried state, and an odor test was carried out by 10 female panelists. First, after perceiving the smell of a synthetic resin bottle and a hand-made sheet of 100% by weight of the raw material in the corrugated cardboard as a blank, with the storage sheet hidden, the husk 5/95% by weight of the raw material in the corrugated cardboard, "Odor = 2 points""Slightly odor = 1 point""No odor = 0 point" for three types of samples, which are 90% by weight of the raw material in the hulls and 90% by weight of the raw material in the corrugated board. Any one of the three stages was selected. The test results are shown in Table 5. It should be noted that this test is not a method of comparing three types of handmade sheets.

[0051]

[Table 5]

As is clear from Table 5 above, the beer husks obtained from the by-products of the beer manufacturing plant, which have not been treated according to the present invention, are used as raw materials in the corrugated cardboard base paper only by mechanical treatment with a refiner. When mixing and making paper,
It can be seen that all the panelists felt an odor when 10% by weight or more of beer hulls were mixed.

On the other hand, a fibrous substance obtained by treating beer hulls obtained from a by-product of a beer manufacturing plant in a 0.5 molar alkaline aqueous solution at 90 ° C. for 120 minutes was used as a fibrous substance 5.・ 95% by weight of raw materials in corrugated board, fibrous material
0/90% by weight of raw material in corrugated board, fibrous material 20/80% by weight of raw material in corrugated board and 100% by weight of raw material in corrugated board, hand-made sheet having a basis weight of 60 g / m ² (JIS P-8209) In the same manner as described above, the fibrous material 5 and the raw material in the cardboard base paper 95% by weight, the fibrous material 10 and the raw material in the corrugated paper base paper 90% by weight, the fibrous material 20 and the corrugated board Raw material in base paper 80
An odor test was performed on three types of samples with weight percent. The test results are shown in Table 6.

[0054]

[Table 6]

As is clear from Table 6 above, when the fibrous material treated according to the present invention was mixed with the raw material in the corrugated fiberboard for papermaking, most panelists did not feel odor.

[0056]

Example 7 Next, the fibrous material of the present invention shown in Example 4 was mixed with a conventional paper towel raw material in an amount of 20% by weight, and A1 was mixed with 30% by weight of the fibrous material.
A conventional paper towel raw material of 100% by weight is used as a blank, and a hand-made sheet having a basis weight of 50 g / m ² (JI
20 sheets were prepared for each of the devices specified by SP-8209, and the basis weight (g / m ² , JIS P-8124), Kin degree (g / cm ³ , JIS P-8118), thickness (m
m / 100, JIS P-8118), tear (g,
JIS P-8116), elongation (%, JIS P-81
32), breaking length (km, JIS P-8113), Gurley stiffness (g / inch, TAPPI standard T)
543pm-84), Klem water absorption (sec / 10mm, J
ISP-8141) and air permeability (sec / 100cc,
JIS P-8117) was compared and measured, respectively. The results are shown in Table 7.

[0057]

[Table 7]

As is clear from Table 7 above, the paper towel prepared using the fibrous material according to the present invention has a slightly lower tear strength as compared with the paper towel prepared by the conventional raw material, but it is practically used. There is no problem in the quality of. Rather, the water absorption is improved, and the quality of the paper towel can be improved.

[0059]

Example 8 Beer husks obtained from a by-product of a beer manufacturing plant were treated with a 0.5 molar aqueous alkali solution at 90 ° C.
The fibrous material obtained by treating for 120 minutes was beaten to 450 cc with Canadian Standard Freeness, and then 70% by weight of fibrous material / kraft pulp (abbreviation: KP) 30
% By weight, 80% by weight of fibrous material, 20% by weight of KP, and thermomechanical pulp as a blank (abbreviation: TMP)
60g basis weight at each ratio of 80% by weight and 20% by weight of KP
/ M ^{2 hand-made} sheet (by the device specified in JIS P-8209) was prepared, and the basis weight (g / m ² , JIS P-
8124), Kin degree (g / cm ³ , JIS P-811)
8), thickness (mm / 100, JIS P-8118),
Tear (g, JIS P-8116), elongation (%, J
ISP-8132), breaking length (km, JIS P-8
113), air permeability (second / 100 cc, JIS P-81
17) was comparatively measured. Table 8 shows the results.

[0060]

[Table 8]

As is clear from Table 8 above, the fibrous material of the present invention is comparable to TMP, which is a type of high-yield pulp, and can be mixed up to a ratio of 80% by weight. I understand. When the fibrous material has a mixing ratio of 90% by weight, a stable hand-made sheet (JIS P-820) is used.
The more difficult it is to prepare (using the device specified in 9), the more remarkable the decrease in tear strength.

[0062]

Example 9 Beer husks which have not been treated according to the present invention obtained from a by-product of a beer manufacturing plant are mechanically treated with a refiner and then mixed with 20 weight% of husks and 80 weight% of bleached wood fibers. In terms of ratio, a basis weight of 190 g / m ² (business card paper) and a basis weight of 120 g / m ² (envelope paper) were paper-made with a cylinder paper machine. As a result, about half of the mixed husks are discharged to the outside of the system as foreign matter by the cleaner device in the raw material selection process, resulting in a significant decrease in yield. In addition, plate stains had already occurred in the first color, and the paper became unusable.

On the other hand, beer husks obtained from a by-product of a beer manufacturing plant were mixed with 9% of a 0.5 molar aqueous alkaline solution.
The fibrous material obtained by treating at 0 ° C. for 120 minutes is used as fibrous material 2
With a mixing ratio of 0% by weight and 80% by weight of bleached wood fiber, basis weight is 1
90 g / m ² (business card paper) and basis weight 120 g / m ² (envelope paper) were paper-made with a cylinder paper machine. As a result, the yield of the fibrous material is significantly improved to the same level as that of the wood fiber, and the paper product has an improved entanglement and hydrogen bond between the fibrous materials or between the fibrous material and the bleached wood fiber. It was able to withstand practical use.

[Brief description of drawings]

FIG. 1 is a plan view of a pulp mold tray.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Shigeo Suzuki 4379 Shimada City, Shizuoka Prefecture Tokai Pulp Co., Ltd. (72) Inventor Tadayoshi Koubayashi 4379 Shimada City, Shizuoka Prefecture Tokai Pulp Co., Ltd.

Claims (12)

[Claims] 1. A method for treating beer hulls, which comprises immersing the beer hulls in an alkaline aqueous solution and treating the beer hulls at a predetermined temperature to obtain a fibrous substance. 2. The alkaline aqueous solution according to claim 1 has a concentration of 0.1 to 1.0 molar and a treatment temperature of 5
The method for treating beer husks according to claim 1, wherein the temperature is 0 to 100 ° C. 3. The method for treating beer husks according to claim 1 or 2, wherein the ash content in the treated fibrous material is 2.0% by weight or less. Beer hull treatment method. 4. A pulp molded product containing a fibrous material obtained by the method for treating beer husk according to any one of claims 1 to 3 as a main raw material. 5. The fibrous material according to any one of claims 1 to 4, wherein the fibrous material is beaten to a Canadian Standard Freeness of 300 to 650 cc with a beating device. Pulp-molded product described. 6. The method according to claim 4, wherein the fibrous material according to any one of claims 1 to 5 is mixed in a ratio of up to 90% by weight with respect to the weight of the pulp molded product. The pulp-molded product according to claim 5. 7. The pulp molded article according to claim 4 to claim 6 is a packaging material for protecting electrical appliances and parts thereof, precision instruments and parts thereof, containers such as glass, cans, plastics, etc., or foods, or the like. A pulp-molded product characterized by being a cushioning material. 8. A paper product obtained by mixing a pulp raw material with the fibrous material obtained by the method for treating beer husks according to any one of claims 1 to 3. 9. The fibrous material according to any one of claims 1 to 3 and 8 is beaten to Canadian Standard Freeness 150 to 650 cc by a beater. Paper products described in. 10. Claims 1 to 3 and claim 8.
10. The paper product according to claim 8 or 9, wherein the fibrous material according to claim 9 is mixed in a ratio of up to 80% by weight based on the weight of the paper product. . 11. The paper product according to any one of claims 8 to 10, which is a sanitary paper, a cardboard base paper, a paperboard or a packaging paper that is required to have good cosmetic properties and printability. 12. The sanitary paper according to claim 11,
A paper product characterized by being a paper towel.