JPH089915A - Filtration sheet for tofu-molding frame - Google Patents

Abstract

PURPOSE:To provide a new type filtration sheet which can solve a variety of operational, hygienic and environmental problems that are encountered by the filter cloth for the conventional TOFU (soybean curd)-molding frame which has been provided in the premise of repeated use. CONSTITUTION:This filter sheet 1 is made of mixed chemical fiber paper whose obverse and reverse surfaces are embossed 1a. In this process for making TOFU, this filtration sheet 1 is used in the draining and molding steps so that the sheet covers the faces of top and bottom or the top and bottom and side walls of the inside surfaces of the mold in the inside molding space. Then, the TOFU milk 3 is poured into the molding space, pressed to effect draining until the TOFU is molded into a desired shape, then the filter sheet 1 used is peeled off and discarded.

Description

Detailed Description of the Invention

[0001]

[Object of the invention]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is designed to remove excess water in a raw material liquid which is attached to an inner wall surface of a molding mold used for producing tofu such as cotton tofu and fried dough. The present invention relates to a sheet-shaped member which is discharged to the outside and used to mold tofu into a predetermined shape, and more particularly to a filter sheet for a tofu-molding mold characterized by its material.

[0002]

BACKGROUND OF THE INVENTION A general process for producing tofu consists of washing, soaking, grinding, boiling, soymilk separation, coagulation, dehydration molding, cutting and packaging. Among them, in the dehydration molding step, a molding frame in which a large number of holes for dehydration having a diameter of about 5 mm are formed in the bottom plate, the side plate, and the lid plate is used. In this dehydration molding step, a filter cloth is laid in the molding frame. It is said that tofu with a textured surface is obtained by adding a raw material liquid such as soymilk that has been heated to about 80 ° C and added bittern to it in a semi-solidified state, and then applying pressure to it. It is a thing.

As the filter cloth used in the dehydration molding step, cotton cloth or linen cloth having a relatively coarse mesh is generally used. The filter cloth is solidified by use, soybean milk or coagulated. Since it is clogged with agents and the like, it has been thoroughly washed after use to restore water permeability and then repeatedly used.

However, the cleaning work of the filter cloth after the use is extremely difficult for an operator, and if the cleaning is incomplete, the remaining soybean milk and the like will be decomposed, which is unfavorable for hygiene. It is also practiced to boil the filter cloth daily with the aqueous solution in which the filter cloth has been put in place, which causes the filter cloth to become worn out in a period of less than one month, and the filter cloth has to be replaced.

Further, in order to wash the filter cloth, a large amount of washing water is required, and this becomes sewage as it is. Therefore, how to treat the large amount of sewage thus generated is also a big problem. It was Furthermore, since the washed filter cloth is stored in a state of containing water until the next use, hygiene that fungi easily grows on the filter cloth and wrinkles are likely to occur when laying in the molding frame. Management and work problems have been pointed out for some time.

[0006]

[Technical Items Attempted to Develop] The present invention was created based on the recognition of such a background, and the recognition held by this kind of filter sheet that it is repeatedly used has been revised and reformed. , Development of a novel filter sheet for tofu molding formwork and a method of manufacturing tofu using this, which aims to solve the above problems by using paper that is disposable and inexpensive and easy to mold I tried.

[0007]

Configuration of the Invention

[Means for Achieving the Object] That is, the filter sheet for a tofu molding mold according to claim 1 is provided so as to be in contact with the inner wall surface of the molding mold, and is excessive in the raw material liquid injected into the molding mold. A sheet-shaped member for a tofu molding form that discharges moisture to the outside and forms a predetermined embossed pattern on the surface of the remaining tofu, wherein the sheet-shaped member is made of synthetic fiber mixed paper with embossed front and back surfaces. It is characterized by being formed.

In addition to the above requirements, the filter sheet for a tofu-molding frame according to claim 2 has a basis weight of 20 to 100 g / m ² and a water permeability of 15.
It is characterized in that it is formed by a synthetic fiber-mixed paper having a breaking length of 0.5 km or more when wet at 25 sec / 10 cm ² or less.

Further, in the filter sheet for a tofu-molding frame according to claim 3, in addition to the requirements of claim 2, the basis weight is in the range of 25 to 65 g / m ² , and the wet sheet is wet. Is characterized by having a breaking length of 0.7 km or more.

Furthermore, in addition to the above requirements, the filter sheet for a tofu molding form according to claim 4 further comprises:
It is characterized in that it is formed of an embossed synthetic fiber mixed paper having an emboss height of 100 μm or more.

Furthermore, in addition to the above requirements, the filter sheet for a tofu molding form according to claim 5 is characterized in that the synthetic fiber mixed paper is unstretched or low-stretched polyester fiber, or unstretched or low-stretched polyester fiber and wood pulp. The composition ratio of the unstretched or low-stretched polyester fiber / wood pulp is 100/0 to 30.
It is characterized by being set within the range of / 70.

Further, in the filter sheet for a tofu molding form according to claim 6, in addition to the requirements of claim 5, the composition ratio of the both is set within a range of 100/0 to 60/40. It is characterized by that.

Further, in the filter sheet for a tofu molding form according to claim 7, in addition to the requirements according to claim 1, 2, 3 or 4, the synthetic fiber mixed paper is made of polyolefin, polyester, polyamide or the like. It is composed of chemical fibers or of these chemical fibers and natural fibers such as wood pulp, hemp pulp, etc., and the composition ratio of both represented by these chemical fibers / natural fibers is set within the range of 100/0 to 30/70. It is characterized by being done.

Further, in the filter sheet for a tofu-molding form according to claim 8, in addition to the requirements of claim 7, the composition ratio of the both is set within the range of 100/0 to 60/40. It is characterized by that.

In addition to the above-mentioned requirements, the filter sheet for a tofu molding form according to claim 9 further comprises a resin such as a polyamide resin, an epoxy resin, an epichlorohydrin resin, or a methylol resin for the synthetic fiber mixed paper. It is characterized by the addition of components.

Furthermore, in the filter sheet for a tofu molding form according to claim 10, in addition to the above requirements, the emboss is
When viewed with the embossed pattern formed on the tofu surface,
A texture pattern such as cotton or silk is formed, or a combination of letters such as company name and product name is formed on it.
Alternatively, the synthetic fiber-mixed paper is characterized in that both or both of these texture patterns and characters are surrounded by a frame line or the like so as to be formed.

Furthermore, the method for producing tofu using the filter sheet for a tofu molding form according to claim 11 is as follows: washing beans, soaking, grinding, boiling, soymilk separation, coagulation, dehydration molding, cutting and packaging. In the method for producing tofu comprising the series of steps of,
In the dehydration molding step, a filter sheet formed of a synthetic fiber mixed paper having embossed front and back surfaces is used, and in performing the dehydration molding, the inner wall surface of a molding mold having a large number of dehydration holes formed therein. The filtration sheet is provided on the upper surface and the lower surface or the upper surface, the lower surface and the side surface of the molding frame so as to be in contact with, and after that, the raw material liquid added with the coagulant is injected into the molding frame, After dehydration under pressure and forming into a product of a predetermined shape, the used filter sheet is peeled off and discarded. Then, the object of the invention is to be achieved by using the constitution of the invention described in each of these claims.

[0018]

According to the present invention, the filter sheet for a tofu molding form according to claim 1 is formed of a synthetic fiber mixed paper having embossed front and back surfaces. As a result, the filter sheet can be manufactured at an extremely low cost as compared with the conventional filter cloth, and can be disposable. Further, along with this, it is not necessary to wash the filter sheet after use, and no dirty water is generated. Furthermore, since it is not necessary to store the filter sheet after use, generation and propagation of the fungus in question do not pose any problem when the filter sheet is stored.

By using a synthetic fiber-mixed paper, excellent water permeability is obtained, and wet strength is imparted. By embossing the paper, the embossed pattern does not lose its shape even when wet, and filtration is performed. Deterioration of the dehydration property caused by the close contact between the back surface side of the sheet (the contact surface side with the molding frame) and the molding frame is prevented. On the other hand, it becomes possible to give the same texture pattern as when a filter cloth is used on the surface of the tofu molded by the embossing applied to the surface side (contact surface side with the tofu) of the filter sheet.

The filter sheet for a tofu molding form according to claim 2 has a basis weight of 20 to 100 g / m ² and an air permeability of 15
It is formed of synthetic fiber-mixed paper having a breaking length when wet of 0.5 km or more at a speed of 25 sec / 10 cm ² or less.
As a result, a filter sheet having an appropriate wall thickness suitable for work can be obtained, good water permeability can be obtained, and a desired dehydrating action can be obtained.

The filter sheet for a tofu-molding frame according to claim 3 has a structure in which the basis weight is 25 to 65 g / m ² and the breaking length when wet is 0.7 km or more. As a result, a filter sheet having an even better wall thickness and water permeability can be obtained, and a desired dehydrating action can be obtained.

The filter sheet for a tofu-molding frame according to claim 4 has an emboss height of 100 μm or more. As a result, a gap is formed between the filter sheet and the molding frame, which is necessary to prevent the adhesion between them or the deterioration of the dehydration property, so that the desired dehydration effect can be obtained and the embossed pattern applied to the surface of the molded tofu. Also, it is possible to make unevenness similar to or more than the embossed pattern formed when a conventional filter cloth is used.

The filter sheet for a tofu molding form according to any one of claims 5 to 8 is a synthetic fiber mixed paper obtained by unstretching or low-stretching polyester fiber, or unstretching or low-stretching polyester fiber and wood pulp, or polyolefin, polyester, It is composed of chemical fibers such as polyamide, or these chemical fibers and natural fibers such as wood pulp and hemp pulp. When making a filter sheet by this,
Wetting tension is imparted by effectively bonding the above-mentioned chemical fibers by heat fusion or the like, and the non-water-absorbing property of the chemical fibers prevents deformation of the shape when wet. Further, due to the hydrophilicity of the above-mentioned natural fibers, it is well adapted to water, imparts a certain degree of shape-retaining property to improve workability, and in addition, the embossed pattern on the surface of the tofu to be molded becomes clear.

The filter sheet for a tofu-molding frame according to claim 9 has a structure in which a resin component such as a polyamide resin, an epoxy resin, an epichlorohydrin resin, or a methylol resin is added to a synthetic fiber-made paper. This further enhances the wet tension of the filter sheet.

The filter sheet for a tofu molding form according to claim 10 has a texture pattern of cotton, silk or the like formed on the surface of the tofu, or a combination of characters such as a company name and a product name. Is formed, or both or either of them is surrounded by a frame line or the like is formed, so that the synthetic fiber-mixed paper is embossed. As a result, a texture pattern of cotton, silk, etc. similar to the case where a conventional filter cloth is used is formed on the surface of the tofu, and further it is possible to form the above-mentioned characters and frame lines which cannot be expressed by the conventional filter cloth. Become.

A method for producing tofu using a filter sheet for a tofu molding form according to claim 11 is a filter sheet formed by a synthetic fiber mixed paper having embossed front and back surfaces in a dehydration molding step. Using the above, the above-mentioned filtration sheet is provided on the upper surface and the lower surface or the upper surface, the lower surface and the side surface of the molding space inside the molding frame, and after the raw material liquid is injected into this,
After dehydration under pressure and shaping into a predetermined shape, the used filter sheet is peeled off and discarded. This makes it possible to form an embossed pattern on a part or the whole of the surface of the tofu, in addition to the effect provided by the invention described in claim 1.

[0027]

EXAMPLE A filter sheet for a tofu molding mold of the present invention and a method for producing tofu using the same will be specifically described below with reference to the drawings. In the explanation, first, the structure of the filter sheet for a tofu-molding form of the present invention will be described, and then, regarding the method for producing tofu of the present invention using this, dehydration which is a part having a characteristic structure The molding process will be mainly described, and finally, seven examples of the filter sheet of the present invention having different conditions and the test contents and test results of five comparative examples for confirming the effect of these examples will be described. To do.

1 to 5, reference numeral 1 is a filter sheet for a tofu molding form of the present invention, which is used for molding tofu, fried dough, etc. (hereinafter referred to as tofu). 2 and 3 are provided so as to be in contact with the inner wall surface 2a of the molding frame 2, and the excess water W in the raw material liquid injected into the molding frame 2 is discharged to the outside, It is used to form an embossed pattern 4a such as a cloth pattern on the surface of the tofu 4 which is the product remaining in the frame 2.

The filter sheet 1 of the present invention is formed of a synthetic fiber-mixed paper, and the front and back surfaces of this synthetic fiber-mixed paper are embossed 1a. First, filter sheet 1
The synthetic fiber-mixed paper, which is a material for the above, will be described. Synthetic fiber mixed paper is a paper obtained by mixing some chemical fibers into wood pulp, which is a natural fiber if it is literally read, and making it into paper, but in the present invention, only a chemical fiber containing no natural fiber is also added to this. Used to include. In the present invention, when the term synthetic fiber mixed paper is used, it means that the chemical fibers in the filter sheet 1 are bonded by heat fusion or the like due to the heat of the dryer of the paper machine or thermal calendering. To do.

As the chemical fiber, unstretched or low-stretched polyester fiber, polyolefin, polyester, polyamide and the like can be used as an example. Further, for the purpose of enhancing the wet tension, a polyamide resin, an epoxy resin, an epichlorohydrin resin or a methylol resin is used. It is also possible to add a resin component such as a resin. As the natural fiber, wood pulp, hemp pulp or the like can be used as an example.

The preferred composition ratios of these are as follows. First, when the synthetic fiber-blended paper is composed of unstretched or low-stretched polyester fiber, or unstretched or low-stretched polyester fiber and wood pulp, both of the unstretched or low-stretched polyester fiber / wood pulp The composition ratio is 100/0 to 30/7
0, preferably within the range of 100/0 to 60/40,
When the synthetic fiber-mixed paper is composed of chemical fibers such as polyolefin, polyester and polyamide, or these chemical fibers and natural fibers such as wood pulp and hemp pulp, both of these chemical fibers / natural fibers The composition ratio is 100/0 to 30/70, preferably 100/0
Within the range of 60/40.

Further, in order to effectively bond these chemical fibers in the filter sheet 1 by heat fusion or the like, an appropriate melting point is set so that the chemical fibers can be heat fused depending on the machine for producing the filter sheet 1. It is necessary to select a type having (or a softening point). That is, for example, in order to effectively heat-bond the chemical fibers only by the heat of the dryer of the paper machine, the dryer temperature of the paper machine is generally around 100 ° C., and therefore all or one of the chemical fibers used is used. The part must be of a type that can be fused around its temperature. On the other hand, when the calender treatment is carried out at a temperature higher than the dryer temperature of the paper machine after papermaking, all or part of the chemical fibers can be of a type that can be fused at that temperature. Since all or part of the chemical fibers act as a binder in this way, the chemical fibers are all unstretched or low-stretched so-called single structure type as well as the core-sheath within the range in which this binder action can be expected. Type or side-by-side composite structure type can be selected (see Table 2 below).

The basis weight of the filter sheet 1 formed from such a synthetic fiber-mixed paper is preferably in the range of ^{20 to} 100 g / m ² , and more preferably 25 to 65 g / m ² , and the water permeability is 15 seconds. / 25 ml / 10 cm ² or less, and the breaking length when wet is 0.5 km or more, preferably 0.7 km or more. This is because when the basis weight is 20 g / m ² or less, the rigidity of the filter sheet 1, that is, the so-called stiffness becomes weak and it becomes difficult to mount it on the molding form 2, while the basis weight is 100 g / m ² or more. This is because it becomes difficult to obtain the desired water permeability and the embossed pattern 4a in the case of
Further, if the water permeability is set to 15 seconds / 25 ml / 10 cm ² or more, the dehydration becomes insufficient, and if the tear length when wet is 0.5 km or less, the filter sheet 1 will be cut and the filter sheet 1 will not be used. This is because the fibers are likely to fall out of the machine.

Here, the basis weight is 20 ° C. and the relative humidity is 65%.
The weight (g) of a sample having a predetermined area left below was measured and converted into the weight (g) per 1 m ² .
Water permeability means that the opening area is 10 cm ² and the volume is 25
Use a glass container with an opening and closing cock at the bottom in ml, and close the opening and closing cock at the bottom to put 25 ml in the glass container.
After pouring in the water, cover the opening with the sample, gently turn the top and bottom, open the opening and closing cock, and measure the time until all the water in the glass container passes through the sample and escapes. . The unit of water permeability is second / 25 ml / 10
It is expressed in cm ² . The breaking length when wet is JIS P
The wet tensile strength measured in accordance with 8135 was used to obtain the value by the following equation, and was expressed as an average value in the MD and CD directions of the sheet. Breaking length when wet = wet tensile strength ÷ basis weight ÷ sample width (15 mm) × 1000

Such a synthetic fiber-mixed paper is subjected to embossing as described above, and the embossing formed on the front and back surfaces of the synthetic fiber-mixed paper is shown in FIGS. 4, reference numeral 1a. In the filter sheet 1 of the present invention, the emboss height of the emboss 1a is set to 100 μm or more. Incidentally 100 μm
In the following cases, the emboss pattern 4a formed on the surface of the tofu 4 after forming will be in contact with the forming mold 2 to reduce the water permeability, and the embossing pattern 4a will not have a desired unevenness. Will be.

Here, the embossing height means MD, CD direction and convex roll 13 on the concave roll 12 side of the embossing roll 11 per sample using a stylus meter (Surfcoder SE-30C) manufactured by Kosaka Laboratory. The surface side is measured in four directions, MD and CD, and the distance from the line connecting the adjacent valleys to the top of the mountain is calculated from each stylus chart obtained by the measurement in these four directions. It means the average height (μm) of the embosses 1a obtained by averaging them. The measurement conditions of the stylus meter in this case are: vertical magnification: × 100, horizontal magnification: × 10,
The measurement pressure was 0.7 mN and the measurement length was 8 mm.

The embossing 1a is formed by subjecting the synthetic fiber-mixed paper to the following embossing. The embossing will be additionally described below. In the embossing process, as shown in FIG. 4, the chemical-fiber-mixed paper P that has not been embossed and is made by a paper machine is supplied to a pair of embossing rolls 11 composed of a concave roll 12 and a convex roll 13, and the concave roll 12 and the convex roll 12 are fed. The concave roll 12 and the convex roll 13 are rotated while sandwiching the synthetic fiber mixed paper P with a constant nip pressure by 13 to form desired embosses 1a on the front surface and the back surface of the synthetic fiber mixed paper P.

Therefore, the woven pattern of the embossed 1a formed on the front and back surfaces of the synthetic fiber-mixed paper, in other words, the embossed pattern 4a formed on the surface of the tofu 4 as a product.
Is determined by the engraving patterns 12a, 13a engraved on the surfaces of the concave roll 12 and the convex roll 13,
Strength of embossed la on synthetic paper (embossed roll 1
The degree of marking by 1) is determined by the rotation speed of the embossing roll 11, the nip pressure, and the temperature of the roll.

As the embossing pattern 4a appearing on the surface of the tofu product 4 as a product by such embossing, a texture pattern of cotton, silk or the like is generally assumed, but other company names, product names, etc. are represented. Emboss pattern 4
a, or these texture patterns and characters are surrounded by frame lines, dots, symbols, etc., and other patterns, figures, created characters,
It is also possible to attach an illustration or the like to the surface of the tofu 4 as the embossed pattern 4a. By the way, it is possible to form such a wide variety of embossed patterns 4a (in other words, to form the filtration sheet 1 having a wide variety of embossed patterns) only when the synthetic fiber mixed paper is used as the filter sheet 1 as in the present invention. is there.

Next, a method for producing tofu of the present invention using the filter sheet 1 of the present invention will be described.
The method for producing tofu of the present invention comprises a series of steps of washing, soaking, crushing, boiling, soymilk separation, coagulation, dehydration molding, cutting and packaging, similar to the general process for producing tofu. And in the present invention, among them, the dehydration molding step has its characteristic constitution, and the other steps have the same constitution as that of the general manufacturing process of tofu, so the details thereof are omitted in this specification. The following description will be focused on the dehydration molding step.

First, it is premised that the filter sheet 1 of the present invention is used in the dehydration molding step in the method for producing tofu of the present invention. In addition, when performing dehydration molding using the filter sheet 1 of the present invention, in addition to this, the molding frame 2 already described is used. The molding form 2 is shown in FIGS.
As shown in FIG. 3, a bottomed casing-like formwork main body 20 including a bottom plate 21 and side plates 22, and a side plate 2 of the formwork main body 20.
2 and a flat plate-like lid body 30 that fits inside.

Further, as shown in FIGS. 1 to 3, a large number of dehydration holes 20a and 30a are formed in the mold body 20 and the lid body 30, and excess water W is supplied from the dehydration holes 20a and 30a.
Are to be discharged. In addition, in the forming mold 2 shown in FIGS.
Although the configuration in which the 2 and 2 are integrated is illustrated, the bottom plate 21 and the side plate 22 may be configured separately, and the dehydration hole 20a may be provided at the position shown in FIG. It may be provided only on 21 or may be provided on both the bottom plate 21 and the side plate 22 as shown in FIG.

Incidentally, in conducting the tests of various examples and comparative examples described below, as an example, a width of 580 mm ×
A mold frame 2 made of aluminum that forms a molding space R having a depth of 680 mm and a depth of 200 mm is used.
a and 30a have a diameter of about 5 mm, and the dehydration holes 20a,
30a arranged at intervals of about 50 mm was used.

Then, for such a molding form 2, as shown in FIG.
As shown in (a), the filter sheet 1 of the present invention is disposed so as to contact the inner wall surface 2a of the molding frame 2. In addition, as an arrangement mode, as shown in FIG. 2, in addition to arranging on the upper surface and the lower surface of the molding space R inside the molding frame 2, as shown in FIG. It is also possible to arrange in Incidentally, such a difference in the arrangement mode is related to whether the embossed pattern 4a is formed on a part of the surface of the tofu 4 or whether the embossed pattern 4a is formed on the entire surface of the tofu 4.

In this way, the raw material liquid 3 for molding the tofu 4 is poured into the molding frame 2 provided with the filter sheet 1 of the present invention (see FIG. 5 (b)). The raw material liquid 3 is generally composed of soy milk M and a coagulant G called bittern, but in addition to this, additives for the purpose of flavoring, coloring, etc. may be added, or vegetables may be added. When the egg tofu is molded, the soymilk M may be replaced by an egg that has been thawed with water or stock.

Incidentally, in the tests of various Examples and Comparative Examples described below, bittern was used as the coagulant G, and soymilk M at about 80 to 90 ° C. was semi-coagulated by adding the bittern. Was used as the raw material liquid 3. Then, when a predetermined amount of the raw material liquid 3 is injected into the mold body 20, as shown in FIG. 5 (c), the rest of the filter sheet 1 arranged on the upper surface of the molding space R is placed thereon, and further the upper surface thereof. The lid body 30 is covered with the lid body 30, and the lid body 30 is pressed from above as shown in FIG. 5D, and the excess water W is continuously dehydrated until the tofu 4 having a predetermined shape and hardness is obtained.

Then, the tofu 4 having a predetermined shape and hardness is taken out from the molding frame 2 and transferred to a water tank. On the other hand, the used filter sheet 1 arranged so as to be in contact with the inner wall surface 2a of the molding frame 2 can be easily separated from the molding frame 2 due to the presence of the embossment 1a formed on the back side thereof. It is possible to dispose of it, and after peeling it off, discard it as it is, and dispose another unused filter sheet 1 in the molding frame 2 in preparation for the next molding dehydration operation.

The method for producing tofu according to the present invention is constructed as described above. Next, seven examples of the filter sheet 1 according to the present invention having different conditions and the effects of these examples will be described. The test contents and results of the five comparative examples for confirmation will be described. In performing the tests of the examples and comparative examples described below, the above-described molding mold 2 is used, and the one shown in the examples or comparative examples described below is used in the mold body 20 to form the lower surface and the side surface of the molding space R. Arranged to cover,
The above-mentioned raw material liquid 3 is poured therein, and the one shown in the embodiment or the comparative example is placed thereon, and the lid 30 is covered.

Then, this is further dehydrated under pressure to form tofu 4 having a predetermined shape and hardness. Then, the finished tofu 4 was transferred to a water tank, and the pass / fail judgment was made by visually observing the uniformity of the surface of the tofu 4 (whether there are crater-like recesses, cracks, etc.) and the formation of the embossed pattern 4. . The test results of Examples and Comparative Examples are shown in Table 1 below.

[0050]

[Table 1]

In Table 1 above, the emboss width means the width of the rising portion of the engraving pattern 12a of the concave roll 12 in the emboss roll 11, and in the measurement, M
The emboss width (mm) was obtained by measuring from the D and CD directions and taking the average value of both. Furthermore, the inter-embossing distance means the engraving pattern 1 of the convex roll 13 in the embossing roll 11.
3a is the width of the rising portion (corresponding to the distance between the vertices of the rising portion of the engraving pattern 12a of the concave roll 12), and in the measurement, it is measured from the MD and CD directions, and the average value of both is taken to obtain the distance between the embosses The distance (mm) was used.

<Structure and Test Results of Examples and Comparative Examples> (1) Examples 1 to 4 Examples 1 to 4 are unstretched polyester fibers (Kuraray E
P201 = registered trademark, 2d × 5 mm) and wood pulp (N
BKP, beating degree 270 ml CSF) at a ratio of 85:15 by a wet paper machine, and a synthetic fiber mixed paper obtained by drying at a dryer temperature of about 100 ° C.
0, 40 and 31 g / m ² . These embossing processes were performed using an embossing roll 11 having a "texture (coarse)" pattern at a speed of 5 m / min, a nip pressure of 20 kg / cm ² , and a roll temperature of 110 ° C. As a result, water permeability is 4.
1 to 8.2 seconds / 25 ml / 10 cm ² , breaking length when wet 0.88 to 1.24 km, and emboss height 166
~ 205 μm, the emboss width is 1.21-1.39 mm,
An embossed paper having an inter-embossing distance of 1.23 to 1.30 mm was obtained. When tofu 4 was produced by using these as the filtration sheet 1, the surface uniformity and the attachment of the emboss (texture) pattern 4a were excellent. It was possible to produce nafu tofu 4.

(2) Example 5 Using the same synthetic fiber paper as in Example 4, using the same embossing roll 11, speed: 5 m / min, nip pressure: 30 kg /
When embossing was performed at cm ² and a roll temperature of 125 ° C., the average embossed height of the embossed paper was 235 μm. Even when this was used, tofu 4 having good surface uniformity and a good embossing (texture) pattern 4a attachment was obtained.

(3) Examples 6 and 7 In Examples 6 and 7, the same undrawn polyester fibers and wood pulp (NBKP, beating degree 350 mlC) as in Examples 1 to 4 were used.
SF) at a ratio of 65:35 and 50:50, and a cationic polyamide-based resin (Japan PM) as a wet paper strength agent.
C-made WS-535 = registered trademark) per 0.1 to the fiber raw material.
9 and 1.5% were blended, papermaking was performed under the same conditions as in Examples 1 to 4, and then embossed. As a result, water permeability was 7.8 and 11.9 seconds / 25 ml / 10 cm ² , tear lengths when wet were 0.73 and 0.51 km, and emboss heights were 200 and 235 μm. The surface uniformity and the attachment of the embossed (texture) pattern 4a of the tofu products 4 produced using these were good.

(4) Comparative Example 1 Comparative Example 1 is a case where the synthetic fiber mixed paper used in Example 4 was used as it was without embossing. The maximum height of surface roughness (Hmax) in this case is 39 μm, and the surface is extremely flat as compared with the embossed papers of Examples 1 to 7. Countless crater-like irregularities appeared on the surface of the tofu 4 thus obtained, and the commercial value of the tofu 4 was significantly reduced. Further, since the tofu 4 obtained did not have the embossed (texture) pattern 4a because there was no embossing 1a, the appearance was different from the case where the conventional filter cloth was used.

(5) Comparative Examples 2 and 3 In Comparative Examples 2 and 3, as the embossing roll 11 using the synthetic fiber-mixed paper of Examples 4 and 3, respectively, a “texture (dense)” pattern and a “silk” pattern were obtained. Is used for embossing under the same conditions as in Examples 1 to 4. Water permeability in this case is 4.8 and 5.2 seconds / 25ml / 10c
m ² , the breaking length when wet is 1.17 and 0.97 km, the embossing height is 82 and 90 μm, the embossing width is 0.85 and 0.46 mm, and the distance between embossing is 0.88.
And 0.55 mm, the embossing height was low and the embossing width and the distance between embossing were narrower as compared with Examples 1 to 7. In this case as well, innumerable crater-like irregularities were generated on the surface of the obtained tofu 4 and the embossing (texture) pattern 4a was shallow and insufficiently attached.

(6) Comparative Example 4 In Comparative Example 4, the same raw material system as in Examples 6 and 7 was used, the blending ratio of unstretched polyester fiber and wood pulp was set to 20:80, and the wet paper strength agent was used per fiber raw material. 1.5% was blended, papermaking was performed under the same conditions as in Examples 6 and 7, and then embossed. As the blending ratio of wood pulp increases, the water permeability deteriorates to 18.5 seconds / 25 ml / 10 cm ² ,
Due to this increase in water flow resistance, the emboss height is 22
Despite being sufficiently high as 0 μm, the surface of the tofu 4 produced using it became non-uniform overall, and as a result the embossed (texture) pattern 4a was also unclear. Further, the breaking length when wet was reduced to 0.24 km, and the filtration sheet 1 having no resistance to water was obtained.

(7) Comparative Example 5 In Comparative Example 5, the surface roughness of the conventionally used filter cloth was measured by the same method. As a result, the conventionally used filter cloth had the same embossing height as in Examples 1-6.

As can be seen from these Examples and Comparative Examples, when the synthetic fiber mixed paper is used as the filter sheet 1 used in the molding frame 2 of the tofu 4 as in the present invention, it has a proper water permeability and a suitable level. It is necessary to add unevenness, that is, emboss 1a. If the filter sheet 1 has good water permeability but the embossment 1a is too small or absent, the synthetic fiber-mixed paper is used as the molding frame 2
Since the inner wall surface 2a of the water will stick to the inner wall surface of the
The open portions of a and 30a can be dehydrated, but the synthetic fiber mixed paper and the inner wall surface 2a are in close contact with each other in the non-perforated portions, resulting in insufficient dehydration, and as a result, tofu 4 It is considered that the surface of No. 4 could not be solidified sufficiently, and when the tofu 4 was taken out and transferred to the water tank, it flowed out to form a crater-like mark. On the other hand, even if the embossing 1a has a sufficient size, the water permeability is poor, and if the water resistance is high, the dehydration is wholly poor and the surface of the tofu 4 is not sufficiently solidified.
It is considered that the surface uniformity becomes poor and, as a result, the embossed (texture) pattern 4a becomes unclear.

On the other hand, by imparting appropriate embossing 1a and excessive water permeability to the synthetic fiber-mixed paper, it is possible to prevent such adhesion between the synthetic fiber-mixed paper and the inner wall surface 2a, and as a result, the dehydration hole 20a, Sufficient dehydration is performed even in the unopened portion of 30a, and the surface of the tofu 4 is solidified uniformly, so that a uniform surface can be obtained even after being transferred to the water tank. Further, by making the embossment 1a so as to obtain the same embossed pattern 4a as the embossed pattern obtained by the conventional filter cloth, the tofu 4 having the same appearance as the conventional one can be manufactured. From the above, as the filter sheet 1 made of the synthetic fiber mixed paper used for the production of the tofu products 4,
Water permeability is 15 seconds / 25 ml / 10 cm ² or less, and the depth of embossed pattern 4a (emboss height) applied to the surface
Is preferably 100 μm or more, and if this condition is satisfied, it is considered possible to change the shape of the embossed pattern 4a according to the final product tofu 4 to be produced.

On the other hand, the basis weight of the filter sheet 1 is not particularly limited as long as the above conditions are satisfied, but 20 to 100 g /
m ² is preferably 25 to 65 g / m ² . Two
If it is 0 g / m ² or less, the stiffness of the paper is weak and the workability is poor.
If it is more than g / m ² , it is difficult to obtain water permeability and an appropriate embossed pattern 4a, which is considered to increase the cost. Further, it can be seen from Table 1 above that the breaking length when wet is decreased with an increase in the wood pulp blending ratio, and the filter sheet 1 loses resistance to water. Since the filter sheet 1 gets wet with water when it is used, if it does not have resistance to water, problems such as paper scraps and fibers falling off the surface of the filter sheet 1 when mixed with water and mixing with the tofu 4 as a product may occur. Conceivable. Actually, such a problem is likely to occur at the level of Comparative Example 4, and therefore, the filter sheet 1 made of the synthetic fiber mixed paper is used.
As a result, the breaking length when wet is 0.5 km or more, preferably 0.7 km or more.

The chemical fiber / wood pulp blending ratio for obtaining the filter sheet 1 having such quality is 100/0 in the case of unstretched polyester fiber.
A range of 30/70, preferably 100/0 to 60/40 is considered necessary. On the other hand, Table 1 shows that only unstretched polyester fibers are used as the chemical fibers. However, if the above-mentioned water permeability, embossing height, basis weight, and breaking length when wet are satisfied, there are particular restrictions. Instead of receiving it, polyolefin fiber, polyester fiber, polyacrylic fiber, vinyl chloride fiber, vinylon fiber or the like may be used.

However, as compared with such a chemical fiber, the unstretched polyester fiber is suitable for the filter sheet 1 for producing the tofu 4 because it is the unstretched fiber and therefore has excellent elongation characteristics and tear resistance. Since the trouble of tearing the paper along the embossed pattern is unlikely to occur during embossing, there is an advantage that it can be applied to embossed patterns 4a having various shapes and various depths. For example, the specific tear strength (tearing strength (JIS P8116) / grammage * 100), which is a measure of the force required when tearing paper, is shown in Table 2 below.
As shown in (1), the unstretched polyester fiber is extremely excellent and has high resistance.

[0064]

[Table 2]

From these results, it becomes possible to use an inexpensive paper in place of the conventional filter cloth, and by disposing of it as a disposable material, the problems when the conventional filter cloth is repeatedly used can be solved. be able to. Further, by newly selecting the embossed pattern 4a, it becomes possible to manufacture the tofu products 4 having a surface with a design that has never been seen before.

[0066]

EFFECTS OF THE INVENTION The filter sheet for a tofu molding frame and the method for producing tofu using the same according to the present invention have the above-described structure. The effect like is demonstrated. The filter sheet for a tofu-molding frame according to claim 1 is formed of a synthetic fiber mixed paper having embossed 1a on the front surface and the back surface. As a result, the filter sheet 1 can be manufactured at an extremely low cost as compared with the conventional filter cloth, and it becomes disposable. Further, along with this, it is not necessary to wash the filter sheet 1 after use, and no dirty water is generated. Furthermore, since it is not necessary to store the filter sheet 1 after use, the storage and storage of the filter sheet 1 does not cause any problem such as generation and reproduction of the fungi.

The synthetic fiber-mixed paper provides excellent water permeability and imparts wet strength, and by embossing the paper, the embossed pattern 4a does not lose its shape even when wet. Filter sheet 1
It is possible to prevent a decrease in dehydration property caused by the close contact between the rear surface side (contact surface side with the molding frame 2) and the molding frame 2. On the other hand, it is possible to apply the same texture pattern as when a filter cloth is used on the surface of the tofu 4 formed by the embossing 1a provided on the surface side of the filter sheet 1 (the side that contacts the tofu 4). Become.

The filter sheet for a tofu molding form according to claim 2 has a basis weight of 20 to 100 g / m ² and an air permeability of 15
It is formed of synthetic fiber-mixed paper having a breaking length when wet of 0.5 km or more at a speed of 25 sec / 10 cm ² or less.
As a result, the filter sheet 1 having an appropriate thickness suitable for the work is obtained, good water permeability is obtained, and a desired dehydration effect is obtained.

The filter sheet for a tofu-molding frame according to claim 3 has a basis weight of 25 to 65 g / m ² and a breaking length of 0.7 km or more when wet. As a result, the filter sheet 1 having an even better wall thickness and water permeability can be obtained, and a desired dehydration effect can be obtained.

The filter sheet for a tofu-molding frame according to claim 4 has a constitution in which the emboss height is 100 μm or more. As a result, a gap is formed between the filter sheet 1 and the molding frame 2 so as to prevent them from adhering to each other or from deteriorating the dehydration property, so that a desired dehydrating effect can be obtained and the surface of the molded tofu 4 is attached. The embossing pattern 4a having the same shape as that of the embossing pattern 4a formed when a conventional filter cloth is used, or more unevenness can be formed.

A filter sheet for a tofu molding form according to any one of claims 5 to 8 is a synthetic fiber-mixed paper made of unstretched or low-stretched polyester fiber, or unstretched or low-stretched polyester fiber and wood pulp, or polyolefin, polyester, It is composed of chemical fibers such as polyamide, or these chemical fibers and natural fibers such as wood pulp and hemp pulp. Thus, when the filter sheet 1 is produced, the chemical fibers described above are effectively bonded by heat fusion or the like to impart a wet tension, and the non-absorption of water prevents shape loss during wetness. Further, due to the hydrophilicity of the above-mentioned natural fiber, it is well adapted to water, imparts a certain degree of shape-retaining property and improves workability, and in addition, the embossed pattern 4a on the surface of the tofu 4 to be molded becomes clear.

The filter sheet for a tofu-molding frame according to claim 9 has a structure in which a resin component such as a polyamide resin, an epoxy resin, an epichlorohydrin resin, or a methylol resin is added to a synthetic fiber-made paper. Thereby, the wet tension of the filter sheet 1 is further enhanced.

In the filter sheet for a tofu molding frame according to claim 10, a texture pattern of cotton, silk or the like is formed on the surface of the tofu 4 or characters such as a company name and a product name are combined with this. The synthetic fiber-mixed paper is embossed 1a so that the product is formed, or both or both of them are surrounded by a frame line or the like. As a result, a texture pattern of cotton, silk, etc. is formed on the surface of the tofu 4 similar to the case where a conventional filter cloth is used, and further the above-mentioned characters and frame lines which cannot be expressed by the conventional filter cloth can be formed. Becomes

A method for producing tofu using the filter sheet for a tofu molding form according to claim 11 is a filtration formed by a synthetic fiber mixed paper having embossed 1a on the front and back surfaces in a dehydration molding step. Using the sheet 1, the filtration sheet 1 is provided on the upper surface and the lower surface or all of the upper surface, the lower surface and the side surface of the molding space R inside the molding frame 2, and after pouring the raw material liquid 3 therein, it is pressurized and dehydrated, After molding into the shape of
The used filter sheet 1 is peeled off and discarded. Thereby, in addition to the effect brought about by the invention described in claim 1, the embossed pattern 4a can be formed on a part or the whole of the surface of the tofu 4.

Since these effects act synergistically, it becomes possible to manufacture a novel filter sheet 1 which has never existed before, and a new use cycle is created accordingly, which reduces the labor burden on the operator. However, it is a very useful tofu 4 rooted in a natural environment that is more hygienic and does not require sewage treatment.
It is possible to build the manufacturing process of.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a filter sheet of the present invention, a molding frame using the same, and a tofu molded by the same.

FIG. 2 is a vertical sectional side view of the same.

FIG. 3 is a vertical cross-sectional side view showing an embodiment in which a dehydration hole is provided in a bottom plate and a side plate, and the filtration sheet of the present invention is provided on all of the upper surface, the lower surface, and the side surface of the molding space.

FIG. 4 is a side view showing a manner of embossing a planar synthetic fiber mixed paper.

FIG. 5 is a vertical cross-sectional side view showing stepwise from the disposition of the filter sheet to the pressing of the lid in the dehydration molding step.

[Explanation of symbols]

 1 Filter Sheet 1a Embossing 2 Mold Form 2a Inner Wall Surface 3 Raw Material Liquid 4 Tofu 4a Embossing Pattern 11 Embossing Roll 12 Concave Roll 12a Engraving Pattern 13 Convex Roll 13a Engraving Pattern 20 Form Frame Main Body 20a Dewatering Hole 21 Bottom Plate 22 Side Plate 30 Lid 30a Dehydration hole G Coagulant M Soymilk P Synthetic fiber mixed paper (before processing) R Molding space W Excess moisture

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Eiichi Kido 3-3-14 Shimoishakujii, Nerima-ku, Tokyo (72) Inventor Yuji Kimura 1008-45 Misawa, Fuji City, Shizuoka Prefecture (72) Inventor Yasuhiro Mochizuki 28-14 Oiwa, Fujinomiya City, Shizuoka Prefecture (72) Inventor Mihide Mochizuki 806-1-A-4 Nishizawada, Numazu City, Shizuoka Prefecture

Claims (11)

[Claims] 1. A surplus water in a raw material liquid which is provided in contact with an inner wall surface of a molding form and is poured into the molding form is discharged to the outside to form a predetermined emboss pattern on the surface of the remaining tofu. A sheet-shaped member for forming a tofu molding form, wherein the sheet-shaped member is formed of a synthetic fiber-mixed paper sheet having embossed front and back surfaces. . 2. The filter sheet has a basis weight of 20 to 100.
Within the range of g / m ² , water permeability is 15 seconds / 25 ml /
The filter sheet for a tofu molding form according to claim 1, which is formed of a synthetic fiber-mixed paper having a breaking length when wet of 10 cm ² or less and 0.5 km or more. 3. The tofu molding form according to claim 2, wherein the basis weight is in the range of 25 to 65 g / m ² , and the breaking length when wet is 0.7 km or more. Filter sheet for. 4. The filter sheet has an embossed height of 10
The filter sheet for a tofu molding form according to claim 1, 2 or 3, which is formed of a synthetic fiber-mixed paper having an embossing of 0 µm or more. 5. The synthetic fiber-mixed paper is composed of unstretched or low-stretched polyester fiber, or unstretched or low-stretched polyester fiber and wood pulp, and is represented by unstretched or low-stretch polyester fiber / wood pulp. The filter sheet for a tofu molding form according to claim 1, 2, 3 or 4, wherein the composition ratio of both is set in the range of 100/0 to 30/70. 6. The composition ratio of the both is 100/0 to 60.
It is set in the range of / 40, The filter sheet for tofu molding molds of Claim 5 characterized by the above-mentioned. 7. The synthetic fiber-mixed paper is composed of chemical fibers such as polyolefin, polyester, polyamide, etc., or these chemical fibers and natural fibers such as wood pulp, hemp pulp, etc., and is represented by these chemical fibers / natural fibers. The filter sheet for a tofu molding form according to claim 1, 2, 3 or 4, wherein the composition ratio of the two is set within the range of 100/0 to 30/70. 8. The composition ratio of the both is 100/0 to 60.
The filtration sheet for a tofu molding form according to claim 7, wherein the filtration sheet is set in a range of / 40. 9. The synthetic fiber-made paper is a polyamide resin,
A resin component such as an epoxy resin, an epichlorohydrin resin, or a methylol resin is added to the tofu molding mold according to claim 1, 2, 3, 4, 5, 6, 7 or 8. Filter sheet. 10. The embossing, when viewed as an embossing pattern formed on the surface of tofu, has a texture pattern of cotton, silk or the like, or a combination of characters such as a company name and a product name. 4. The synthetic fiber-mixed paper is formed so that the textured paper and / or the textured pattern and / or the letters are surrounded by a frame line or the like. 4, 5, 6, 7, 8
Alternatively, the filter sheet for a tofu molding frame according to 9 above. 11. Washing beans, soaking, grinding, boiling, soymilk separation,
In the method for producing tofu comprising a series of steps of coagulation, dehydration molding, cutting and packaging, in the dehydration molding step, a filter sheet formed of synthetic fiber mixed paper with embossed front and back surfaces is used, When performing molding, the filtration sheet is provided on all of the upper and lower surfaces or the upper surface, lower surface and side surfaces of the molding space inside the molding frame so as to contact the inner wall surface of the molding frame in which a large number of dehydration holes are formed. After that, inject the raw material liquid with the coagulant added into the molding frame, pressurize and dehydrate it, mold it into a product with a predetermined shape, peel off the used filtration sheet, and discard it. A method for producing tofu using a filter sheet for a tofu molding mold, comprising: