JPH07246065A - Binder for fish feed - Google Patents

Abstract

PURPOSE:To obtain the subject binder capable of imparting moist pellets with water-absorbing ability, molding shapability and oil-absorbing ability, comprising carboxymethylcellulose sodium salt and ground pulp. CONSTITUTION:This binder comprises (A) carboxymethylcellulose sodium salt (pref. 0.6-0.9 in etherification degree) and (B) ground pulp. It is preferable that the component B accounts for 5-50-wt.% of the final binder and the 1% aqueous solution viscosity of the component A be 5000-20000mpa.s for the purpose of raising the binder's tack.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a binder for fish feed. More specifically, not only water absorption and shape retention,
The present invention relates to a binder for fish-feeding foods, which is also excellent in oil absorption.

[0002]

2. Description of the Related Art Conventional binding agents for fish feed include, for example, alginates, blends of alginates and calcium salts, guar gum, polyacrylic acid salts, carboxymethyl cellulose sodium salts and the like. These binders are prepared by crushing frozen fish into an appropriate size in the frozen state, mixing this with a powdered feed containing fish meal, vitamins, minerals, etc. It is used for a fish-culture feed (generally referred to as moist pellets) formed into a shape.

Recently, however, liquid feed has not been used, or even if it is used very little, liquid oil (usually liver oil is usually added to the mash for supplementing the lack of oil supplied from raw feed). Demand for mono-type moist pellets prepared by actively adding (used) is increasing.

[0004]

When the above-mentioned binder is used in such a single type moist pellet, the oil absorbency is insufficient because the oil is positively blended, so that it is difficult to remove when it is thrown into water. Oil or the like is generated, and the shape retention, which was satisfactory in the conventional moist pellets, is also deteriorated.

The object of the present invention is to provide a moist pellet positively blended with liquid oil, which is capable of imparting not only the conventional binder function (water absorbing property, shape-retaining property) but also oil absorbing property. Is to provide.

[0006]

The present invention has been made by paying attention to such conventional problems, and as a result of intensive research, carboxymethylcellulose sodium salt (hereinafter referred to as CMCNa) was pulverized in a specific amount. They have found that the above problems can be overcome by blending pulp, and have reached the present invention. That is, it is a binder for fish feeds, which comprises CMCNa and crushed pulp, and the crushed pulp is contained in the binder in an amount of 5 to 50% by weight.

(Requirements Constituting Means) The shape retention and oil absorption of moist pellets are related to the etherification degree of CMCNa used in the present invention and the viscosity of 1% aqueous solution (that is, polymerization degree).

Regarding the shape-retaining property, when the degree of etherification of CMCNa is high, the caking property is strong, and pellets having a small diameter are sticky, stick to each other and agglomerate. On the other hand, when the degree of etherification is low, the adhesive force is weak, and the pellets are easily broken or broken.

On the other hand, regarding oil absorption, it is better that the degree of etherification is low and the viscosity is high.

Thus, CMCNa used in the present invention
The etherification degree of is preferably 0.6 to 0.9 in view of the balance between the shape-retaining property and the oil absorption property. Further, regarding the viscosity of the aqueous solution of 1%, from the viewpoint of strengthening the adhesive strength for maintaining the shape-retaining property of the molding, it is 5000 to 20000 mpa. It is preferably s.

The degree of etherification indicates how many glucose hydroxyl groups are substituted with a carboxymethyl group having an ether bond in one glucose unit of cellulose.

The crushed pulp used in the present invention may be any pulp, for example, dissolving pulp or kraft pulp. Regarding the degree of crushing, C
To facilitate uniform mixing with MCNa,
Alternatively, a 60 mesh pass product (that is, 250 μm or less) is preferable because it is uniformly mixed with the moist pellets.

This crushed pulp is blended with CMCNa, and the blending amount is 5 to 50 with respect to the whole binder.
When the blending amount is less than 5% by weight, the oil absorption of pellets is small and the blending effect of crushed pulp is small, and when the blending amount exceeds 50% by weight, the caking force imparted by CMCNa is small. , The shape retention of moist pellets is weakened.

There is no problem even if the binder of the present invention is mixed with other binders such as sodium alginate, guar gum and sodium polyacrylate.

The binder of the present invention exerts an excellent effect on moist pellets positively mixed with liquid oil.
In this case, the addition amount of liquid hot water is 1 to 1 with respect to the mash.
It is 0% by weight. This may be the limit because blending with an amount of oil exceeding 10% by weight makes pelletization difficult.

The content of the binder of the present invention is 0.3 to 10% by weight, more preferably 1.0 to 3.0% by weight, based on the moist pellets, which is advantageous in terms of performance and economy. Is.

[0017]

A highly oil-absorptive fish feed can be produced by combining the water absorption and shape retention obtained by using CMCNa with the oil absorption obtained by using pulp.

[0018]

EXAMPLES The present invention will be specifically described below with reference to examples. Examples 1 to 5 and Comparative Examples 1 to 3 to 97 parts by weight of fish meal (white fish meal), Table 1
A mash was prepared by uniformly mixing 3 parts by weight of the binder produced at the blending ratio of the pulverized pulp shown in 1 above. On the other hand, frozen sardines were minced with a crusher or the like and crushed with a chopper to produce a minced raw bait of frozen sardines.

Next, to 60 parts by weight of the mash, 50 parts by weight of the minced bait, and 5 parts by weight of feed oil (Alaska pollack liver oil) (8.3% by weight based on the mash) were added and mixed well with a mixer or the like. After that, a granulator was used to produce two types of moist pellets having plate hole diameters of 3.1 mm and 9.6 mm. (The compounding amount of the binder with respect to the moist pellets is 1.6% by weight)

Next, regarding the obtained moist pellets,
The following evaluation items were evaluated according to the following criteria, and the results are shown in Table 1. Evaluation item

(1) Hardness The moist pellets were pinched with fingers, and the shape collapse at that time was observed. ○: Hard and firm. △: Soft and easily deformed ×: Soft and cannot be pelletized

(2) Stickiness Moist pellets were piled up in a pile and the stickiness of the pellets was observed by the degree of sticking of the pellets at this time. ○: No stickiness △: Stickiness, pellets stick to each other ×: Stickiness, pelletization not possible

(3) Water bleeding Five pellets were put in a glass petri dish and the state was observed at room temperature. ◯: No water bleeding on the pellet surface for 5 hours or more Δ: Water bleeding after standing for 5 hours or more ×: Water bleeding after pellet molding

(4) Disintegration property in water 500 g of pure water was placed in a 500 ml beaker, 10 pellets were added at room temperature, and after 30 minutes in a stationary state, the collapse state of the pellet in water was observed. ◯: Pellets do not collapse in water Δ: Pellet edge parts collapse ×: Pellets collapse

(5) Oil oozing out In a disintegration test of pellets in the above water, 500 m
The water surface in the l beaker was observed. ◯: No oil bleeding into water ×: Oil oozes out and floats on the water surface

Examples 6 to 10 and Comparative Examples 4 to 6 Similarly to the above examples, except that the feed oil (Alaska pollack liver oil) for mash was 2 parts by weight (3.3% by weight with respect to mash). Pellets were manufactured and evaluated in the same manner. The results are shown in Table 2.

[0027]

[Table 1]

[0028]

[Table 2]

By blending a predetermined amount of crushed pulp, not only water absorption and molding shape retention but also oil absorption is excellent.

[0030]

EFFECTS OF THE INVENTION By using the binder for fish feed of the present invention, excellent water absorption and molding shape retention can be obtained for moist pellets to which oil is positively added, and oil separation from the pellets can be achieved. Can be prevented.

Claims (2)

[Claims] 1. A binding agent for fish feed, comprising a sodium carboxymethyl cellulose salt and crushed pulp, wherein the crushed pulp contains 5 to 50% by weight of the binding agent. 2. The degree of etherification of the sodium salt of carboxymethyl cellulose is 0.6 to 0.9, and 1
% Aqueous solution viscosity is 5000 to 20000 mpa. The binder according to claim 1, which is s.