JP3463508B2 - Manufacturing method of drip absorbing sheet - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an economically advantageous drip absorbing sheet which absorbs and separates drip generated from fresh food to prevent deterioration of quality.

[0002]

2. Description of the Related Art Generally, cutting fresh foods (hereinafter referred to as foods) such as meats, fishes, vegetables, fruits, etc. destroys cell tissues and causes fluids inside and outside the cells to flow out, resulting in deterioration of freshness.
Further, as the freshness decreases, the water retention capacity of the food also decreases, the amount of exudate called so-called drip increases, food self-digestion, bacterial multiplication, lipid oxidation, discoloration, etc. occur, further promoting the quality deterioration. In recent years, various dehydration sheets have been proposed in which a powdery granular water-absorbent resin and a semipermeable membrane are combined in order to reduce water content in foods without changing the taste and to remove drip generated. However, these dehydration sheets must use a powdery granular water-absorbent resin or liquid saccharide, wrap them at least on one side as a semipermeable membrane, and seal the periphery of the semipermeable membrane. Therefore, the production requires special technology and equipment, resulting in a high cost product. Further, since the sheet is shipped as a sheet with the peripheral portion sealed, the sheet size is limited, and the user is forced to select a sheet having a size close to the desired size. In order to solve these problems, an absorbent sheet comprising powdery and granular edible saccharides sandwiched and laminated between a semipermeable membrane and a water-absorbing porous sheet (Japanese Patent Laid-Open No. Hei 4 (1998) -264242).
No. 71443).

[0003]

However, since the sheet sandwiches the edible sugar, powder particles may fall off from the cut end face, and it is necessary to pay close attention. Furthermore, the manufacturing process requires two steps of manufacturing the porous sheet and laminating the semipermeable membrane, which is a factor of cost increase. The present invention has been made in view of such circumstances, and an object of the present invention is to provide an absorbent sheet that suppresses the fall of powdery edible sugars from the cut end surface and that is economically advantageous.

[0004]

Means for Solving the Problems As a result of intensive studies, the present inventors have found that the above object can be achieved by adhesively fixing an edible saccharide to a substrate inside the substrate,
The present invention has been completed based on this finding. That is, the present invention comprises a substrate comprising at least a hydrophilic fiber and a granular edible sugar and a semipermeable membrane laminated on at least one surface of the substrate, wherein the edible sugar is not exposed on the surface of the substrate and The present invention provides a drip absorbing sheet characterized in that the drip absorbing sheet is dispersed and arranged in a sheet and is fixed to a hydrophilic fiber by adhesion.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The hydrophilic fiber in the present invention is a fiber having a hydrophilic surface, and specific examples thereof include various pulps, natural or regenerated cellulose, PVA fiber, PA.
Examples include N fibers and polyolefin fibers whose surfaces are hydrophilized. Preferable examples of the hydrophilic fiber include those composed of a hydrophilic fiber aggregate and a hydrophilic fiber web, and the aggregate and the web being integrated. The above web contains polyamine, epichlorohydrin resin, dialdehyde starch, and
Paper strength reinforcing agents such as sponge and carboxymethyl cellulose may be added.

Further, the edible sugars in the present invention include:
Specifically, fructose, glucose, oligosaccharides, starch syrup, maltose,
Examples include sucrose. The content of the base material is 1 m ²
10 to 200 g is preferable per 30 to 15
0 g is preferred.

The base material of the present invention is characterized in that powdery edible sugars are dispersed and arranged inside the hydrophilic fiber, and the edible sugars do not exist on the surface. Specifically, for example, it is preferable that the surface is a hydrophilic fiber aggregate and the inside is a hydrophilic fiber web in which edible sugar particles are dispersed and arranged.

Specific examples of the semipermeable membrane in the present invention include cellophane, polyvinyl alcohol and polyether / ester / amide block copolymers. The water-absorbent sheet of the present invention comprises the above-mentioned base material and a semipermeable membrane bonded to each other within a range not impairing water permeability. When a food is placed on the semipermeable membrane of the absorbent sheet of the present invention, part of the water in the food swells the semipermeable membrane and permeates. Due to the permeated water, the granular edible sugar becomes a concentrated aqueous solution state, and further absorbs water due to the strong osmotic action. This water absorption ability is maintained until there is no difference in osmotic pressure between the food and the aqueous saccharide solution. The saccharide aqueous solution generated by this water absorption is absorbed and retained by the hydrophilic fibers of the base material, and the food and drip are completely separated through the semipermeable membrane, so that the freshness is retained.

The absorbent sheet of the present invention is obtained, for example, by wet-paper forming an aqueous slurry containing hydrophilic fibers in a forming part of a wet paper machine and performing a suction dewatering process to form a wet granular web on the wet fiber web immediately before the press part. It is obtained by a method of spraying the edible saccharide of (1), further laminating a semipermeable membrane on a substrate having a hydrophilic fiber aggregate laminated thereon, and then drying and integrating with a dryer. Further, since the absorbent sheet of the present invention has the above-described structure and manufacturing method, powder particles do not fall off even if it is freely cut, and it can be manufactured in a batch process, which is economically advantageous.

[0010]

EXAMPLES The present invention will be described in more detail below with reference to examples. Example 1 Chemical pulp having a fiber roughness of 0.18 mg / m (softwood kraft pulp, manufactured by Skeena Cellulose Co., SKEENA PRIME
) Was dispersed and mixed in water to form a fibrous web in a forming part of a wet paper machine so that the dry basis weight was 40 g / m ² . Then, the fibrous web is dried with a suction box so that the water content is 20% based on 100 parts by weight of the dry web.
The web was dewatered to reach parts by weight. Then, immediately before the press part, powdery edible sugar (anhydrous crystalline glucose, manufactured by Sanmatsu Industry Co., Ltd., A
(HC arc) was uniformly sprayed at 60 g / m ² . On the surface of the fiber web on which the edible sugars have been sprinkled, an absorbent paper (basis weight: 40 g / m ² ) which has been preliminarily made as a fiber aggregate is superposed, and a regular cellophane paper (Nimura Kagaku Co. PT # 300) was put into a dryer, dried at a temperature of 140 ° C., and integrated to obtain a single absorbent sheet having edible sugars fixed inside the substrate. . The obtained sheet is cut into 10 × 10 cm and vertically hung in a horizontal circular vibration automatic vibration machine (radius; 15 mm, vibration frequency; 150 cycles / minute), and the weight of the fallen powder particles after 30 minutes of vibration is measured. did. Moreover, the obtained absorbent sheet was cut into 10 × 20 cm, a commercially available yellowtail fillet was placed on the cut sheet, vacuum-packed, and then allowed to stand in a refrigerator at 5 ° C., and the water-absorbent weight of the water-absorbent sheet was measured with time. did. The results are shown in Table 1.

Example 2 Example 1 was repeated except that a polyvinyl alcohol film (LH # 18, manufactured by Tohcello Co., Ltd.) was used instead of cellophane. The results are shown in Table 1.

Example 3 Instead of cellophane, a polyether / ester / amide block copolymer (manufactured by Elf Atchem Japan Co., PEBAX resin, MV1074) having a thickness of 18 was used.
The same procedure as in Example 1 was carried out except that a film of μm was used. The results are shown in Table 1.

Comparative Example 1 Absorbent paper (basic weight 80
g / m ² ) and 60 g / m ^{2 of} powdery granular edible sugar (anhydrous crystalline glucose, manufactured by Sanmatsu Industry Co., Ltd., AHC arc)
Evenly. Then, a laminate obtained by stacking ordinary cellophane paper (PT # 300, manufactured by Nimura Chemical Co., Ltd.) on the upper surface was pressed and adhered by a hot press at 140 ° C. to obtain one absorbent sheet. Using the obtained sheet, the same measurement as in the example was performed. The results are shown in Table 1.

[0014]

[Table 1]

[0015]

INDUSTRIAL APPLICABILITY The absorbent sheet of the present invention is useful because it suppresses the release of powdery edible sugars from the cut end surface and is economically advantageous.

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Claims (2)

(57) [Claims] 1. A wet fiber web formed by wet-making a water slurry containing hydrophilic fibers, powdery granular edible sugar is sprinkled onto the wet fiber web, and a hydrophilic fiber aggregate is superposed on the edible sugar. A method for producing a drip absorbing sheet, comprising laminating semipermeable membranes, and drying and integrating them. 2. A hydrophilic fiber web is formed in a forming part of a wet paper machine, and after a suction dehydration step,
Immediately before the press part, while spraying powdery granular edible sugar on the web, superposing a hydrophilic fiber aggregate on it, further laminating a semipermeable membrane on the upper surface, and then drying and integrating with a dryer. A method for producing a characteristic drip absorbing sheet.