JPH037340B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a binder for fish feed. In recent years, marine farming of yellowtail, sea bream, flounder, horse mackerel, tiger puffer, coho salmon, etc. has become popular, but the food used for these fish farms is sardines, mackerel, sea eel, giant eel, krill, etc. Frozen fish is thawed in the open air or in seawater, etc., and then minced or cut into pieces and live bait is fed. As a result, the quality of live bait decreases when it thaws, and the thawing juice and leftover bait after thawing cause contamination of fish grounds, which in turn causes the occurrence of red tide, leading to frequent diseases and poor survival. This has become a major problem as the economic growth rate and growth rate decline. In response to these current conditions, in fish feed,
Frozen fish is cut into pieces of appropriate size while frozen, mixed with powdered feed containing fishmeal, vitamins, minerals, etc., so-called matsushi, and then formed into any shape (generally pellet-like). Fish feed for fish farming is known. Also known are fish feeds containing alginates, calcium salts, and guar gum as binders. Furthermore, binders consisting of alginates, guar gum and carboxymethylcellulose salts have been proposed. The basic composition of fish feed using these binders is granulated food (generally called moist pellets) at a mixing ratio of 1 part raw food (minced frozen fish, thawed fish) to 1 part matushi. ing. Further, the particle size is usually 5 to 7 mm in diameter. However, recently, due to economic efficiency and the palatability and growth rate of farmed fish, a combination of 2 to 4 pieces of live bait/1 piece of matsushi, etc.
Furthermore, the size of the moist pellets is 3 mm in diameter.
Widths as wide as 30mm have become widely requested. In order to satisfy these demands, the present inventor has
As a result of intensive research, we have arrived at the present invention. That is, the present invention provides a binder for fish feed consisting of live bait and pine nuts, characterized by containing a carboxymethylcellulose salt having a degree of etherification of 0.6 or more and less than 0.8, a 1% aqueous solution, and a viscosity of 9000 cps or more. It is. In the present invention, sometimes the raw bait and matsushi are 2/1 to 1/2
Particularly excellent effects are exhibited at a blending ratio (weight ratio) of 2 and when the pellet size is 3 mm to 15 mm in diameter [5 to 30 mm in length]. The degree of etherification indicates how many hydroxyl groups of glucose are substituted by carboxymethyl groups in one glucose unit of cellulose through ether bonds. Examples of salts of carboxymethylcellulose include sodium, potassium, or ammonium salts. One of the properties required of a binder is water absorption, but in order to impart water absorption to carboxymethylcellulose salt, the degree of polymerization must be increased, that is,
It is recognized that higher viscosity is better. In addition, the degree of etherification is determined by the amount of polar groups,
It is an index that indicates the adhesiveness (adhesiveness and bonding properties) required for the binder of moist pellets. As a result of studies conducted by the present invention, it has been found that when the degree of etherification of the carboxymethyl cellulose salt is low, moist pellets with weak adhesiveness and easily crumbling or breaking can be produced. On the other hand, if the degree of etherification is high, the stickiness is strong, and small-diameter moist pellets become sticky, stick to each other, and form clumps. In this way, it was confirmed that the degree of etherification has a strong influence on the moldability of moist pellets, and the carboxymethylcellulose salt of the present invention having a degree of etherification in the range of 0.6 or more to less than 0.8 was found to be effective in molding moist pellets. It has been discovered that it has excellent effects on sex. There is no problem in adding other binders such as sodium alginate, guar gum, and sodium polyacrylate to the binder of the present invention. Further, the blending amount of the binder of the present invention is 0.3 to 10% by weight, more preferably 0.3 to 10% by weight based on the moist pellets.
A content of 1.0 to 3.0% by weight is advantageous in terms of performance and economy. The present invention will be specifically explained below using examples. Example To 97 parts by weight of fish meal [white fish meal], carboxymethyl cellulose sodium salt (hereinafter referred to as CMC-Ma) [A] (degree of etherification 0.71, 1
% aqueous solution viscosity 11,000 cps, the viscosity was measured using a BM type rotational viscometer rotor No. 4 and a rotor rotation speed of 30 rpm for a 1% aqueous solution in terms of anhydride at 25°C. 3 parts by weight (the same applies hereinafter) are uniformly mixed to obtain mash. On the other hand, the connected sardines are cut into small pieces using a rasher or iron hammer, and crushed using a chopper to obtain minced raw frozen sardine bait. Next, add 50 parts by weight of the minced raw bait obtained using a hammer to 50 parts by weight of the above-mentioned mash.
After thoroughly mixing the weight parts with a mixer or the like, moist pellets were obtained using a granulator with plate hole diameters of 3.1 mm and 9.6 mm. Table 1 shows the appearance and physical properties of the moist pellets. As a comparison product, degree of etherification is 0.89, viscosity is 1%
CMC-Na[B] of 9900CPS, degree of etherification 0.56,
The case where CMC-Na [C] with a 1% viscosity of 10,500 cps was used is also shown.

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Claims (1)

[Scope of Claims] 1. A binder for fish feed consisting of raw bait and pine nuts, characterized in that it contains a carboxymethylcellulose salt having a degree of etherification of 0.6 or more and less than 0.8, a 1% aqueous solution, and a viscosity of 9000 cps or more. 2. Raw bait and matsushi characterized by containing a carboxymethyl cellulose salt with a degree of etherification of 0.6 or more and less than 0.8, a 1% aqueous solution, and a viscosity of 9000 cps or more, in a mixing ratio (weight ratio) of 2/1 to 1/2. A binder for fish feed according to claim 1.