Functional Acids And Salts 2007

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Specialties Functional Acids and Salts

Functional Acids and Salts Coatings – advanced tools Jungbunzlauer’s coating experience of over 20 years has led to a broad range of products to satisfy customer needs for sophisticated food ingredients and additives.

What is coating? Coatings are applied to the surface of a core material to provide specific benefits. These coatings form a layer around crystalline materials and are usually transparent or semitransparent, thus optically not visible on the coated ingredient. The coating process, also called encapsulation, modifies the physical properties of the encapsulated product. The coating provides technological benefits during manufacturing, storage, use, or consumption of the processed food product. Specific encapsulation techniques and materials, as well as the activity of the core material, provide a broad range of tailor-made coating products and a fine-tuning of the desired properties for customer applications.

Range of coating materials In some applications, water soluble materials, e.g. water soluble carbohydrates (maltodextrines, spray dried glucose syrup), provide the needed functionality. Another form of modification for improved performance can be a small layer of a citrate on the surface of citric acid to prevent any undesired reaction during storage. Typically, the coating content ranges from 1 to 5 % by weight. Another aim of the Jungbunzlauer coating technology is to make active substances hydrophobic by encapsulating them with edible fats. These taste- and odourless fats display high chemical and physical stability as a coating material and originate from plant sources. Both the type of coating material and the concentration at which the coating layer is applied to the core material, have an important influence on the functionality of the coated product. Generally, the coating content can range from approx. 3 % to 40 %.

Particle size distribution In addition to the type and the content of the coating material, the selection of the particle size distribution of the core material determines the functionality of the encapsulated product. Generally, fine particles lead to a thin coating layer due to the high specific surface area, and vice versa.

Fat Coated Products

Jungbunzlauer coated organic acids CITROCOAT® is the Jungbunzlauer trademark for encapsulated citric acid. Further organic acids are coated by Jungbunzlauer in order to exploit their individual technological properties and taste profiles. The current spectrum of tailor-made encapsulated acids is as follows: ■ citric acid ■ monosodium citrate ■ trisodium citrate ■ malic acid ■ fumaric acid ■ ascorbic acid ■ glucono-delta-lactone Main applications for CITROCOAT® and other acids coated by Jungbunzlauer can be found in the confectionery and in the meat products industry. For example, in sour fruit gums CITROCOAT® HP/HS as well as coated malic acid or coated fumaric acid prevent sticking and provide prolonged sour taste. In preserving sugar, CITROCOAT® HP inhibits foaming during cooking of jams. In meat processing, thick-layer coated organic acids are applied for temperature-controlled acid release.

Coating purpose and main applications for fat coated products ■ Prevention of unwanted acid hydrolysis of other ingredients ■ Temperature-controlled acid release in meat processing ■ Inhibition of dust development ■ Foam inhibitor in gelling agents and in preserving sugar ■ Gentle acidulant in instant drinks ■ Extended/sustained acidulant in sour fruit gums and in chewing gums ■ Mild acidulant in milk products ■ Flour improvement

Legal aspects The materials used for encapsulation (e.g. carbohydrates or vegetable fat) are pure foodstuffs themselves and can be labelled as regular ingredients according to existing food regulations.

Jungbunzlauer nomenclature for coated products

CITROCOAT ® A 1000 HP coated citric acid

coating material anhydrous

percentage of coating material (1000 = 10 %)

Coating materials HS = thin-layer coating (max. 25 %) with sunflower oil HP = thin-layer coating (max. 25 %) with palm oil TS = thick-layer coating (min. 30 %) with sunflower oil TP = thick-layer coating (min. 30 %) with palm oil N

= thin-layer coating with monosodium citrate

Functional Citrics Citro DC Citro DC is the direct compressible type of citric acid. A thin layer of glucose on the surface improves both processing speed for tablets and enhances tablet hardness. It is also suitable for products where fat is undesired, e.g. in blends with water-soluble ingredients.

Breaking strength of effervescent tablets Citro DC

Citric acid uncoated

Citro DC ■ to speed up compaction process ■ to enhance tablet hardness

breaking strength [N]

600

400

200

45

50

55 pressing force [kN]

Citro DC shows superiour tablet hardness and increased pressing force leads to harder tablets

CITROCOAT® N CITROCOAT® N is based on citric acid as core material, with a layer of a citrate as shell material. In the dry state, it is less hygroscopic and less reactive with other ingredients compared to regular citric acid. When dissolved in water, however, it behaves like uncoated acid.

Storage stability of effervescent tablets in a stress test CITROCOAT ® N

Citric acid uncoated

weight loss due to reaction [%]

2

CITROCOAT® N ■ to reduce stickiness during process ■ to prevent premature reactions with other ingredients in the dry state (e.g. sodium bicarbonate) ■ to increase shelf life of end products

1

0

1

2

3

4

7

8

9

10

11

storage time [days]

The information contained herein has been compiled carefully to the best of our knowledge. We do not accept any responsibility or liability for the information given in respect to described product. Our product has to be applied under full and own responsibility of the user, especially in respect to any patent rights of other and any law or government regulation.

Applications Main applications in which the functional citrics are processed: ■

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Pharmaceutical applications (e.g. effervescent tablets) Food applications (e.g. effervescent tablets, instant drinks, sweets) Health care (e.g. bath bombs, dental cleaners) Detergents (e.g. laundry powders and tabs, dish washing tabs, and cleaners)

Benefits to our Customers Depending on the customer’s needs, the benefits can be summarised as follows: ■

protection of encapsulated particles against moisture, micro-organisms, or oxygen

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better behaviour in the production process (less stickiness, less offspec production)

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Effervescence effects… Effective effervescent

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improvement of production capacity due to higher speed in tablet pressing omission or postponement of investments (de-bottlenecking by better processability) improvement of free-flowing characteristics reduction of dust development specific time- or temperaturecontrolled release of the core material prevention of undesired reactions with other ingredients homogeneous distribution of lowconcentrated substances (both core and coating material) in premixes better end product quality (less caking, harder tablets, enhanced shelf life) penetration of new markets – improved robustness of end products opening better possibilities with respect to storage and transport

Jungbunzlauer Companies Jungbunzlauer is represented in all major markets. Our global network of sales companies and distributors covers more than 130 countries.

GERMANY Ladenburg NETHERLANDS Papendrecht

FRANCE Marckolsheim

CANADA Port Colborne

HUNGARY Budapest

SWITZERLAND Basel

USA Boston

AUSTRIA Vienna/ Pernhofen

ROMANIA Oradea

SERBIA Subotica

JAPAN Tokyo

INDIA Mumbay SINGAPORE Singapore

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everywhere.

constant contact with the customers, in order to learn, to understand and thus to respond to specific needs.

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