JPS6031456B2 - Treatment method for tubular cellulose casing - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a treatment method for imparting excellent releasability, shirring properties and anti-scrubbing properties to tubular cellulose casings, particularly cellulose casings for food use for packaging and processing foods. be.

Recently, cellulose casings have been increasingly used in food casings used in the processed food industry, replacing the natural casings and protein-based synthetic casings traditionally used in fields such as frankfurter sausages and salami sausages. I came. This is mainly due to its excellent air permeability and surface gloss, as well as appropriate strength and elongation, and in particular, the ability to mass-produce any size. This cellulose casing is mainly used for molding meat emulsion in the manufacturing process of skinless sausages, which are called skinless types of frankfurter sausages. In these processed sausages, the casing is usually removed from the contents prior to final packaging. Peeling of the casing has recently been carried out using a high-speed automatic peeling machine, but if the peelability between the casing and the meat emulsion is not sufficient, production efficiency will drop and in some cases the surface of the meat may become rough. As a result, the commercial value of the product is completely lost.
This phenomenon is further exacerbated by changes in the meat emulsion formulation and inappropriate processing conditions. On the other hand, the casing used is usually a cylindrical rod-shaped body called a stick, which is usually pleated to a certain length and compressed about 70 to 100 times in order to improve automatic filling performance. It is common that Therefore, the quality characteristics that a casing stick should have include relatively satisfactory shirring ability in a shirring machine, prevention of shirring from sticking, peelability from the food contents, and self-retention of the stick. . Regarding the manufacture of these sticks, there have already been published Japanese Patent Publications No. 35-15792, No. 38-2131, No. 40-879, No. 43-523, and No. 49-49.
No. 53, No. 49-6106, No. 51-2610y, etc., and these publications clarify this type of technology.

Regarding the above-mentioned food casings, many attempts have been made in Japan as well as abroad to manufacture casings with good releasability.

One of them is, for example, aliphatic ketenes, aliphatic isocyanates, stearic acid, chromic chloride, water-soluble silicones, polymerized silicones, inorganic salts, quaternary ammonium salts,
A peeling layer is formed on the contact surface between the casing and the contents by applying a fluorocarbon derivative, saccharide, etc. to the inner surface of the casing or allowing it to penetrate from the outer surface. However, each of these proposed substances is not satisfactory for various types of meat emulsion formulations and processing conditions, and in particular, sufficient peelability cannot be obtained when using the high-speed automatic peeling machine mentioned above. There are some drawbacks that make it impractical.

Therefore, recently, the inner surface of cellulose casings has been treated with a homogeneous mixture of water-soluble cellulose ethers and an oil component selected from animal oils, vegetable oils, mineral oils, silicone oils or adducts of alkylene oxides of water-soluble fatty acid partial esters. A method of treating with a monoglyceride-diglyceride mixture of water-soluble cellulose ether and oleic acid having a capillary melting point of about 54 oC or less, as in Jikai No. 51-63926, has been proposed.

However, although all of these products satisfy high-speed automatic peeling properties, they may be difficult to pleat when manufacturing sticks, or the sticks of the resulting sticks may be too sticky, making it difficult to fill them with meat emulsion. However, it has some drawbacks such as being easily damaged, so it has not yet been fully satisfied.

The inventors of the present invention have focused on the above-mentioned actual situation, and have attempted various studies in order to eliminate the drawbacks.The inventors have found that the above-mentioned drawbacks have been found to be insufficient in the lubricity and anti-sticking properties of oil components, especially in aqueous mixtures. We have found that this is due to its dispersion stability.

Therefore, the object of the present invention is to improve the above-mentioned drawbacks, to have excellent pleatability and appropriate pleat adhesion, and to be able to sufficiently satisfy the high-speed peeling machine even when a high-speed peeling machine is used. An object of the present invention is to provide an improved tubular cellulose casing.

An important feature of the present invention is that the fold fixation performance, which is an important characteristic in cellulose casings for food use, has been significantly improved compared to conventional technology.

An advantageous composition of the treatment agent, ie, the stripping agent, for achieving the objects of the present invention as described above is obtained by a homogeneous aqueous composition comprising a water-soluble cellulose ether and a fatty acid moiety ester of bear sugar; It is obtained by combining polyol and water.

Thus, it is a feature of the present invention that the inner surface of a tubular cellulose casing is treated with a homogeneous aqueous coating composition containing a water-soluble cellulose ether and a fatty acid partial ester of methane, thereby reducing the amount of water per casing of at least 0.00% per casing.
15-9 cellulose ether and 0.001-0.02
The purpose is to coat the inner surface of the casing with the fatty acid partial ester of the saccharide described in No. 5 and 9.

Hereinafter, details of the specific features of the present invention will be made clearer in further order. First, the tubular casing to which the method of the present invention is applied is a cellulose casing, which is usually manufactured by the viscose method, as has been made clear by the art in this field.

As disclosed in many documents, this method adds caustic soda and carbon disulfide to cellulose raw material to obtain sodium cellulose xanthate, dissolves this in dilute caustic soda solution to obtain viscose, and slits this viscose into an annular slit. This is the most common manufacturing method for tubular cellulose casings, and is discharged into a coagulation chamber through a regeneration process, regenerated into cellulose, then washed with water, desulfurized, bleached, and finally softened and dried. be.

Next, the water-soluble cellulose ether, which is a component of the release agent composition that is an important feature of the present invention and is used for the inner surface treatment of the tubular cellulose casing, includes methylcellulose, ethylmethylcellulose, hydroxyethylcellulose,
Hydroxyf.

These include lopylcellulose, hydroxypropylmethylcellulose, ethylhydroxyethylcellulose, carboxymethylcellulose, and carboxymethylhydroxyethylcellulose, all of which are main components that impart releasability to the casing. , carboxymethylcellulose is most preferred and commonly used. Note that water-bath-uniform cellulose ether is generally commercially available as a sodium salt, and the cellulose ether of the present invention also contains these.

On the other hand, the fatty acid partial ester of brown sugar, which is another component to be mixed with the water-soluble cellulose ether, is a partial ester of palmitic acid of bear sugar, a partial ester of stearic acid of sugar sugar,
It includes oleic acid partial esters of recommended sugars, and these monoesters, diesters, and triesters are usually used, but monoesters and gesters are particularly suitable as they satisfy both solubility and lubricity.

This fatty acid partial ester of bear sugar provides lubricity to reduce the resistance between the shirring mandrel and the stick during the subsequent shirring process, and also has an effective effect on adjusting the adhesion force between the pleats of the stick.

It should be noted that the water-retaining cellulose ether and the fatty acid moiety ester of the saccharide, which are components of the above-mentioned stripping agent composition, are formed in the aqueous coating composition to be treated in combination with the polyol and water.

In this case, the polyol is used to control the amount of water added to the stick, and the water acts as a solvent for the components, while at the same time giving the casing flexibility and giving the stick proper adhesion so that it can self-adhere. Effective in increasing support. Examples of polyols include glycerin, propylene glycol, triethylene glycol, etc., which are approved for food hygiene.

The concentration of each component in the coating composition in the method of the present invention is not necessarily constant depending on the type of casing to be treated, treatment conditions, etc., but generally, the concentration of water-soluble cellulose ether is 0.2 to 2% by weight, Concentration of fatty acid partial ester of citrus sugar: 0.5 to 3% by weight, polio-ru concentration: 20
~80%, balance water.

If the concentration of fatty acid partial esters in walnut sugar exceeds 5% by weight, the coating composition solution becomes viscous steel, making it difficult to process into casings, which is not preferable. In addition, the concentration of polyol is regulated by the amount of water added to the casing and the viscosity of the coating composition, and experiments have shown that the concentration of polyol is
To increase the moisture content by 5%, the polyol concentration must be 5%.
It has been found that 0% is appropriate. In addition to the above-mentioned components, the coating composition may appropriately contain a partial fatty acid ester of sorbitan, a small amount of alcohol, and the like.

The fatty acid partial ester of sorbitan is effective in promoting lubricity during shirring of the casing, and
Alcohol is effective in improving the solubility or dispersibility of the fatty acid partial ester of bear sugar, and at the same time adjusting the viscosity of the aqueous coating composition to facilitate smooth processing onto the casing.

Another advantage of the coating composition in the method of the invention is that the coexisting water softens the casing and prevents breakage during shirring or filling. However, adding too much moisture will increase the frictional resistance between the casing and the shirring mandrel, making operation in the shirring process difficult and damaging the 5 sticks, so it is usually in the range of 15 to 20%. It is desirable to adjust the moisture content to . Further, another advantage of the coating composition is that since the dissociation of the pleats after pleating is small, strong self-supporting properties are obtained, and bending of the stick due to uneven coating is alleviated.

If a composition other than the composition of the present invention is used, for example, an oily liquid, the stick will have poor self-supporting properties because the adhesion strength in the gaps between the pleats will be extremely small, and it will easily break during handling. This will cause problems in the filling operation.

In the present invention, any means such as coating, spraying, dipping, etc. can be adopted as a means for treating the inner surface of the casing with the coating composition, but the generally preferred means is through the shirring shaft of a shirring machine. A method of increasing fog is used.

In this case, the conditions that the treatment liquid must have in order to produce good mist are to keep the viscosity and surface tension as low as possible, and by doing so, the size of the liquid particles in the mist can be reduced. , it can be applied uniformly to the inner surface of the casing. Among the commonly used cellulose ethers,
Carboxymethylcellulose has a carboxymethyl group substitution per anhydroglucose unit of cellulose of 0.
1 to 1.0, the viscosity of a 2% aqueous solution is 10 to 13 ratio p
s is appropriate. The second component, a fatty acid partial ester of a competitive sugar, has a low surface tension even at low concentrations, so
It is further suitable for processing by the forgery method as described above.

Also, although it does not have a polyoxyethylene group unlike other surfactants, it has high water permeability and a high HLB, so it increases the dispersion stability of the coating composition and improves the dispersion stability of conventional coatings. There is no need to worry about stability as in compositions. The influence of this dispersion stability on pleat adhesion is as described above. In addition, as an example of a preferable coating composition, there is one in which a small amount of alcohol coexists with these compositions, but by adding alcohol, the particle size of the liquid in the mist that is atomized becomes smaller, making it possible to obtain uniform coating. In addition, the solubility of the fatty acid partial ester of bear sugar can also be improved.

The amount of each component to be coated on the casing varies depending on the type of cellulose casing, etc., and is not uniform, but there is an appropriate range. In other words, water-soluble carboxymethyl cellulose ether is coated on the inner surface of the casing at least 0.
It is necessary to adhere to a bond of 9/0015, and if it is less than this, it is difficult to obtain appropriate high-speed releasability.

However, if it exceeds 0.016 female/ground, not only will the adhesion of the folds of the stick increase, causing damage during filling, but it is also unnecessary in terms of maintaining the necessary peeling performance. The processing amount range for obtaining the most suitable stable peelability is 0.005 to 0.010, 9/c tiger.

On the other hand, the adhesion amount of fatty acid partial ester of tate sugar is required to be at least 9/bulb of 0.001 to the casing surface in order to obtain appropriate anti-sticking properties, and 0.025
It is important to keep it within a range of no more than 9/c points. If the fatty acid partial ester of sugar sugar is less than 9/c of 0.001, it will not be possible to obtain the required crease sticking prevention property, and if it is more than 0.025 side/c, the casing will be damaged during pleating due to its high viscosity. On the contrary, the friction between the shirring mandrel and the shirring mandrel increases, resulting in poor slippage and damage to the stick.
Therefore, in order to obtain appropriate shirring and shirring properties, a 9/c bevel of at least 0.001 is required on the inner surface of the casing.
Preferably, it is effective to coat the fatty acid partial ester of sucrose with a ratio of 0.0025 to 0.11. Of course, it is natural that the coating composition to be applied to the casing contains polyol and water, respectively, from the above-mentioned composition, and in addition, a fatty acid partial ester of sorbitan and a small amount of alcohol may be blended. Each of these components is also attached at the same time.

Cellulose casings treated with the above-mentioned coating composition and coated with cellulose ether and fatty acid partial ester of bear sugar on the inner surface have excellent shirring and filling properties due to the synergistic action of each component. sex,
It has high-speed releasability and prevents sticking of folds, and is particularly effective in preventing the fixation of folds at the end compared to conventional casings.

Therefore, if the treated tubular casing is shirred by a shirring machine and further compressed 70 to 10 times to form a stick, the processing of the processed tubular casing in the process of manufacturing frankfurter sausages, especially skinless sausages, etc. Efficiency can be improved.

Hereinafter, the method of the present invention will be further specifically explained with reference to Examples.

However, it goes without saying that the method of the present invention is not limited to these embodiments, and may be modified as appropriate without departing from the purpose. In addition, in the examples, all percentages are percentages by weight.

Example 1 The inner surface of a tubular cellulose casing with a diameter of 16 sails manufactured by the viscose method was sprayed with the following coating composition liquid m through the core of a shirring machine, and coated at a ratio of 9/ground of 0.5. Samples {1}'2} according to the present invention were prepared.

{1- Average degree of substitution of carboxymethyl group is 0.7 and 2%
1% carboxymethylcellulose with an aqueous solution viscosity of 2 ps, 0.5% monooleic acid ester of bran sugar, 0.5% sorbitan monostearate, 50% glycerin, 48% water, ■ Carboxymethylcellulose 1 from '1] above %, monopalmitic acid ester of buckwheat sugar 2%, glycerin 50%, water 47%, and the same as above using the coating composition liquids of the following legs to {7-} as comparison samples separately from the above samples. It was sprayed through the mandrel of a shirring machine and coated on the inner surface of a tubular cellulose casing on the diameter 16 side at a ratio of 9/ground of 0.5 to prepare samples '3' to '7'.

(2% of 2500 with average degree of substitution of 3' methyl group 1.9
Viscosity of aqueous solution 5 ratio ps 1% methylcellulose, solpitan triolefinate 1%, olefinic acid sesquiglyceride 0.5%, glycerin 50%, water 47.5%,'
4) Carboxymethylcellulose 1%, sorbitan trioleate 1%, sesquiglyceride oleate 0.5%, glycerin 50%, with an average degree of substitution of carboxymethyl groups of 0.7 and a viscosity of 2% aqueous solution at 25°C of 2 ps. , water 4
7.5 {5- Composition {4' carboxymethylcellulose 2%, sorbitan trioleate 2%, oleic acid sesquiglyceride 1%, glycerin 50%, water 45%
'6} 1% carboxymethyl cellulose of composition ■,
Sorbitan trioleate 1.5%, glycerin 50
%, water 47.5% {7} Composition (4) containing 2% carboxymethyl cellulose, 3% mineral oil, 50% glycerin, and 45% water. Fill sausage emulsion with automatic filling machine, cook, smoke,
After passing through each cooling step, the casing was peeled from the contents using a high-speed peeling machine, and the results shown in Table 1 were obtained.

The adhesion force in Table 1 is determined by grasping one end of the stick of a fixed f-type tension gauge and moving the stick at a constant speed (
This is the force required to release the folds of the stick when pulled downward at a rate of 30 skin/min). In addition, the filling property and the peeling property were evaluated based on the following criteria during the filling operation and the peeling operation, respectively. Filling property A: Can be filled at high speed without any problems.

B: Occasional tearing occurs during filling.

C: Operation difficult due to many tears during filling.

Peelability A: High-speed peeling is possible without any problems.

B: Occasionally, peeling defects occur.

C: It is not possible to peel it off from the contents at all.

Table 1 Sample Repair Fixation Strength (Fillability Peelability 1 200 A A 2 180 A A 3 210 A B~B 4 290 B A 5 350 C A 6 280 C B 7 470 C A As a result of the above test, the sample {Bekki 7}' The dispersion stability of the liquid composition of the meat was poor, and the creases of the stick did not dissociate smoothly during filling, causing occasional tears and leakage of the meat emulsion.

It has also been found that the filling properties are controlled by the adhesion force of the stick's pleats, and that if the adhesion force exceeds 250 degrees, tearing occurs during filling, which poses an operational problem. The peelability showed excellent peelability from the processed sausage by treatment with 0.005/9 carboxymethyl cellulose per casing.

Judging from these results, the sample river and [
2} had satisfactory adhesion, filling properties, and peelability. Example 2 Coating composition solutions were prepared according to the following compositions with different types and concentrations of carboxymethyl cellulose, recommended sugar, and fatty acid partial ester, and casings were prepared in the same manner as in Example 1 at a base ratio of 0.5. Samples [1-7] were obtained by adhering to the inner surface, and their adhesion, filling properties, and releasability were examined, and the results shown in Table 2 were obtained.

In the table, evaluation was performed according to Example 1. Composition {1': 2% of 25qC with average degree of substitution of carboxymethyl group 0.7
0.5% carboxymethyl cellulose with an aqueous solution viscosity of 2 ps, 0.5% sucrose monopalmitic acid ester,
50% glycerin, 49% water Composition ■: Composition '1' of carboxymethyl cellulose 1%, bear sugar monopalmitic acid ester 0.1%, glycerin 50%, water 48.9% Composition (3': Composition '1') Power hydroxyl methyl cell.

Composition: 2% carboxymethyl cellulose of composition {1), 1% monopalmitic acid ester of high sugar, 50% glycerin, water 47% Composition ■: 1.5% carboxymethyl cellulose with an average degree of substitution of carboxymethyl groups of 0.7 and an upper limit viscosity of 13 ps for a 2% aqueous solution of 25 o○, 1.5% monopalmitic acid ester of bear sugar
, 50% glycerin, 47% water Composition ■: Composition {1} of carboxymethyl cellulose 1.5%, ditristearate 1.5%, glycerin 50%, water 47%
% Composition {7}: Composition {1} of 1% carboxymethyl cellulose, 3% monooleic acid ester of sugar, 50% glycerin, 46% water Table 2 Sample repair Adhesion strength G) Filling property Peeling property 1 200 A A~ B2 3
00 B A3 200 C A 4 270 A~B A5 22
0 A A6 190 A A 7 240 A A As a result of the above test, a sample with a high concentration of 5% monopalmitic acid ester of swallow sugar (the viscosity of the composition liquid was viscous, and therefore the fins were It is difficult to mist evenly,
Both sample (2), in which the concentration of monopalmitic acid ester of bear sugar is as low as 0.1%, and the above-mentioned sample '3' have large frictional resistance between the casing and the shirring mandrel during the shirring operation. Damage occurred to the stick.

Other samples by the method of the present invention {U, (4), ■, {6},
Each sample [7] had excellent anti-sticking properties, filling properties, and peeling properties, and was fully satisfactory.

Claims (1)

[Scope of Claims] 1. The inner surface of the tubular cellulose casing is made of an aqueous material consisting of 0.2 to 2% by weight of water-soluble cellulose ether, 0.3 to 3% by weight of fatty acid partial ester of sucrose, 20 to 80% by weight of polyol, and the remainder water. Treated with coating composition, casing 1c
A method for treating a tubular cellulose casing, characterized in that the inner surface of the casing is coated with at least 0.0015 mg of cellulose ether and 0.001 to 0.025 mg of fatty acid partial ester of sucrose per m^2. 2 Water-soluble cellulose ether has a degree of etherification of 0.6~
At 1.0, the viscosity of a 2% aqueous solution at 25℃ is 10 to 130 cp.
The method for treating a tubular cellulose casing according to claim 1, which is s. 3 The fatty acid partial ester of sucrose is sucrose and palmitic acid,
Claim 1 which is a monoester, diester, triester or a mixture thereof of at least one fatty acid selected from the group consisting of stearic acid and oleic acid.
A method for treating a tubular cellulose casing according to item 1 or 2.