JPH02204011A - Chitin sheeting method and device therefor - Google Patents

Abstract

PURPOSE:To fully spread chitin without shrinkage by a method wherein chitin as stock is gradually pressed vertically through an upper and a lower reservoirs by an upper and a lower endless belts so as to separate and remove water content from the stock and, at the same time, spread the stock so as to form chitin sheet. CONSTITUTION:An upper and a lower belts 14 and 15 are narrowed toward their leading sides. In addition, chitin as stock liquid 18 under the state being pinched by an upper and a lower reservoirs 16 and 17 is passed between the belts so as to smoothly separate the water content retained therein from the chitin as stock liquid through the pores of the porous reservoirs for dehydration. The water content passes under vacuum through a net or the pores 15a of the porous lower belt 15 and falls on a dehydrating plate 7 provided beneath the net or the lower belt and is discharged. Further, since the chitin as stock liquid 8, some degree of dehydration from which is performed by a press roller 10 and rollers 9g and 9f, is pressed as is integrally pinched by the upper and the lower reservoirs 16 and 17 and consequently the shrinkage of the chitin is checked by the upper and the lower reservoirs, the chitin is fully spread, even though the chitin has originally plenty of shrink characteristics.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a chitin sheet molding method and its molding method, and more specifically, to a molding method that can continuously and smoothly mold chitin raw materials containing squid chitin into a sheet shape, and its method. Related to equipment.

Traditional techniques Chitin, which is collected from crab and shrimp shells and squid spines, is
As is well known, N-acetyl-0-glucosamine residue is β
-1,4Ii! It is a natural polymer of conjugated homomucopolysaccharides. Also, once chitin is biodegraded, II! Chitin, which is collected from squid spines, has a soft structure and is highly digestible in living organisms, so it would be possible to form it into, for example, a sheet without causing environmental pollution.

- Temporary skin substitute (can be used for a variety of other purposes in addition to scar cover).In other words, chitin obtained from the shells of crabs, etc. is called α-type chitin, and has a strong multilayer structure due to numerous hydrogen bonds. Because of this, it is hard and has historically low biocompatibility.

On the other hand, the chitin that can be taken from the squid spine (hereinafter abbreviated as "Naka-ika chitin") is called β-type chitin and has 11
11 It is structurally softer than the former and has high in vivo digestibility.

Therefore, if squid chitin can be molded into a sheet shape as so-called chitin paper, it can be used as a temporary skin substitute, and progress can be made in the medical field. However, in order to adapt to these uses, it is necessary that the method of molding squid chitin into sheet form and the equipment for it have actually been established, but these molding methods and manufacturing HI!
has not yet been proposed or implemented.

The most common sheet-form molding technology is related to paper mR. A paper stock liquid with uniform water content is sent to this paper machine, and in the paper machine, while the paper stock liquid passes on the screen, the water in the paper stock liquid is filtered through the screen. A layer of paper is formed on a screen, and then this wet paper layer is compressed and dewatered while passing through press rolls, and is then led to a drying section where it is dried. However, when squid chitin is formed into a sheet using this paper machine, the properties of the squid chitin raw material liquid and the valve raw material liquid are essentially different, and a wet paper layer is formed using the normal method. Therefore, chitin sheets cannot be continuously printed on Pp paper.

For example, Japanese Patent Application Laid-open No. 61-500073 discloses a paper machine in which a paper stock liquid is supplied between two endless press bands, and paper is made while being pressurized and dehydrated by a pair of press rollers between them. is listed. In addition, special public relations
1-37396, two endless nets are provided facing each other during drying, and a suction box is provided on each of these opposing surfaces to supply Rla between the two endless nets. A drying apparatus for dehydrating and drying is described.

However, even if the chitin raw material liquid is formed into a sheet shape using these paper machines or drying devices and then dried, a good chitin sheet or so-called chitin paper cannot be obtained.

Problems to be Solved by the Invention The purpose of the present invention is to solve the above-mentioned drawbacks, and specifically, to create a chitin sheet or chitin paper that is continuous and compatible with the properties of squid chitin and is of good quality and can be used as a temporary skin substitute. We propose a molding method and device that allows smooth rolling.

Means for solving the problem and its operation, the method of the present invention includes a pair of upper and lower S-end belts,
While placing them with a gap narrowed towards the leading side,
A chitin raw material liquid that meets squid chitin is supplied to this gap while being sandwiched between a pair of upper and lower reservoirs, and this chitin raw material is sequentially pressed from the upper and lower ends via the upper and lower reservoirs by upper and lower blind end belts to remove moisture. The VI sign is defined as the formation of a chitin sheet by removing 1lIl of the chitin and expanding it to form a chitin sheet without shrinking.

In addition, a gi arrangement suitable for this method is a pair of upper and lower endless belts arranged one above the other with a gap narrowed toward the leading side, and composed of a porous belt or a mesh belt. And each of these has no upper or lower 1? VIt12 is comprised of upper and lower reservoir rollers that supply upper and lower reservoirs to the end belt, respectively, and a dewatering plate disposed at the bottom of the endless belt.

Therefore, the structure of the means and its operation will be explained with reference to the drawings as follows.

Note that FIG. 1 is a layout diagram of one of the devices that flow through the present invention, and FIG. 2 is a longitudinal sectional view of a part of the molding device.
Figure 3 is a sectional view taken along line A-A in Figure 2, and Figure 4 (
a) and (bl) are explanatory diagrams each showing a cross section of a molded chitin sheet. Among them, in FIG. Return roller, 4 is a vacuum pump, 5 is a trap, 6 is an upper reservoir rewind roller, 7 is an upper heat termination belt device, 8 is a dewatering plate, 9 is an upper heat termination belt device, 10 is a press roller, 11 is a drying 12 indicates a take-up roller for the upper reservoir, and 13 indicates a take-up roller for the product and the lower reservoir.

First, as shown in Figure 1, the upper M end belt installation! 9 and the upper heat termination belt device 7 are arranged one above the other.

The upper heat termination belt device 9 is constructed by winding the belt 14 endlessly between the rollers 9a to 9g, and the upper heat termination belt device similarly wraps the belt 15 endlessly between the rows 518 to 7t. It is composed by winding it into a shape. Furthermore, each of the above-mentioned belts 14 and 15, especially the lower belt 15, is made of a net or porous belt, and as described below (as described later), the water discharged or dehydrated from the chitin raw material liquid is transferred to the upper and lower reservoirs. Through the pore or gap, the pore 15a (see Figure 2)
dehydrated from. Note that the pores or pores 15a (n diameter) between the upper and lower reservoirs can be configured to any size as long as they can be dehydrated, but are configured to such an extent that chitin fibers do not flow out, such as 150 mesh, for example.

Next, attach these upper and lower free end belts! The unwinding roller 6 of the upper reservoir 16 is located at the upper and lower parts of 7.9, respectively.
and a rewind roller 3 of the lower reservoir 17,
The upper and lower reservoirs 16.17 are unwound from these double-sided unwinding rollers 6.3, and the upper and lower endless belts @7.9
continuously between each belt 14,15. Both reservoirs 16, 17 are made of, for example, nylon or other porous synthetic resin, and the upper and lower belts 14, 15 are respectively narrowed toward the leading side so that the gap therebetween becomes continuously narrower.

Incidentally, upper and lower reservoirs 16 and 17 are interposed between these upper and lower belts 14% and 15, and between them, chitin raw material 1t18 is supplied as described later, and this chitin raw material liquid 18 is subjected to spreading, pressing, drying, etc. The chitin raw material 118 can be supplied by any method. However, when this supply is carried out automatically, the squid chitin (dry state) is usually fed in the suspension tank 1. A chitin raw material solution 18 containing squid chitin in suspension is created by stirring in a book, and this chitin raw material 'a18 is sucked up by a pump and passed through the flow valve 2 and trap nozzle 2a to the upper and lower belts 14, 15. Supply between.

In addition, as shown in FIGS. 1 and 2 in the top heat termination 1i apparatus 1, a dewatering plate 8 is disposed below the belt 15, and this dewatering plate 8 is connected to a trap 5 connected to a vacuum pump 4. The moisture on the dehydration plate 8 can be discharged by the vacuum pump 4.

Next, a press roller 10 is provided adjacent to the downstream side of the upper and lower endless belts 8@7.9. This press roller 10 is arranged opposite to the rows 59g and 9t of the upper heated end belt 8 and 9, and these press rollers 10 and rollers 90.9
As shown in FIG. 4(a), the chitin raw material i1 is dehydrated to some extent between the upper and lower belts 14 and 15.
g can be pressed and spread to form a chitin sheet. This chitin sheet is sandwiched between the upper and lower reservoirs 16 and 17 from its front and back surfaces, and remains in the drying section 1.
1, during which residual moisture is removed and the product is dried without shrinkage. After that, on the downstream side, the upper reservoir 16
is wound up by the winding roller 12, and as shown in FIG. It is wound up.

As mentioned above, the chitin raw material liquid is transferred to the upper and lower reservoirs 16.1.
7, the upper and lower belts 14.
While dewatering by pressing at step 15, it is spread to form a sheet, and the water is released smoothly during spreading, and the spreading itself is also promoted.
After that, press roller 10 and self-roller 9 (J, 91
When the chitin sheet is pressed and rolled out to form a sheet, and then dried in the drying section 11, a chitin sheet that does not shrink due to heat is obtained.

In other words, the chitin raw material liquid containing squid chitin is extremely soft because the squid chitin has a β-yarn structure, and this is swollen and becomes a suspension state. .This is similar to the conventional example Perdobu I2・S (single layer,
In the case where one liter of coolant liquid is directly sandwiched between the upper and lower belts and pressurized, it is almost impossible to spread the retained moisture into the water. According to the present invention, as shown in FIG. 2, the belts 14 and 15 are squeezed toward the leading side.
- Because it passes between bars 16 and 17,
The moisture retained in the 4-Nitin raw material liquid is smoothly released from the pores of the porous reservoir and dehydrated. It passes through the hole 15a, falls onto the dewatering plate 8 provided below, and is discharged.

(The press roller 10 and the roller 9g, the culm-dehydrated chitin raw material liquid 18 between the 9 layers is sandwiched between the upper and lower reservoirs 16 and 11 and pressed while being integrated, so it originally shrinks. Even if chitin is rich in sex, its contraction is blocked by the reservoirs 16 and 17 in the upper part, so it can be sufficiently spread.

In addition, in the drying section 11, it is wrapped and transferred between rollers!
[Even if heat 1111a or the like is blown into the H, the dehydrated chitin raw material will be stored in the upper and lower reservoirs 1 in the same way.
6.171. Because it is sandwiched between and integrated,
Chitin itself is added! Even if it contracts considerably at 1 o'clock, it is completely prevented by the upper and lower reservoirs 16 and 17.
When drying is carried out, sufficient drying is carried out.

After drying, the upper γ-bar 16 is wound up by the winding reloaf 12, but as shown in FIG. Chitin sheet 19 in a state where it is spread out
is obtained.

<Effects of the Invention> As explained in detail above, the present invention provides a pair of chitin raw material liquid containing squid chitinta between a pair of upper belts with open end belts arranged with a gap between them facing the leading side. The chitin raw material is supplied while being sandwiched between the upper and lower reservoirs, and the chitin raw material is sequentially pressed from above and below through the upper and lower reservoirs by upper and lower S-end belts to remove 5 tons of water and spread it out to form a chitin sheet. It is characterized by

Therefore, the chitin raw material liquid contains squid chitin suspended in water, but it is sandwiched between the reservoirs in the upper part and between the upper and lower belts, and is pressed by the upper and lower belts. Since the chitin raw material liquid is spread, it is sufficiently spread, and during this time, the moisture is smoothly drained away, so that even if there is a J5 after that, it will remain sandwiched between the upper and lower reservoirs. Because it is pressed and heated to dry,
Chitin can fully spread without shrinking.

[Brief explanation of the drawing]

FIG. 1 is a layout diagram of one of the devices embodying the present invention, FIG.
The cross-sectional view taken along line A-F and FIGS. 4(a) and 4(b) are explanatory diagrams each showing a molded chitin sheet in cross section. Reference numeral 1...Suspension tank 2...Flow valve 3...Reservoir return roller 4...
...Vacuum bong 1 5...Trap 6...Upper liner bar winding F roller...
・・Top heating end belt device 8・・・Dewatering plate 9・・・Top heating end belt device 10・・Press roller 11・・・Drying section 12・...Upper reservoir winding roller 13...
... Rolling loaf of product and lower reservoir

Claims (1)

[Claims] 1) A pair of upper and lower endless belts are arranged with a gap narrowed toward the leading side, and a chitin raw material solution containing squid chitin is sandwiched between a pair of upper and lower reservoirs in this gap. This chitin raw material is sequentially pressed through the upper and lower reservoirs by upper and lower endless belts to separate and remove moisture and spread it to form a chitin sheet without shrinking. A chitin sheet molding method characterized by 2) The chitin sheet molding method according to claim 1, wherein the upper and lower reservoirs are made of porous synthetic resin. 3) The upper and lower endless belts are each composed of a porous belt or a mesh belt, and the separated moisture is removed through the pores of the belts.
Or the chitin sheet molding method described in 2. 4) A pair of upper and lower endless belts that are arranged one above the other with a gap that narrows toward the leading side and are composed of porous belts or mesh belts, and upper and lower reservoirs are provided in each of these upper and lower endless belts. 1. A chitin sheet forming apparatus comprising upper and lower reservoir rollers for supplying water to each other, and a dewatering plate disposed below the endless belt.