Curdlan (polysaccharide gel) is generated by microbial fermentation of a polysaccharide. The substance can be heated for its solidification property.

Product Details


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Description: Curdlan (polysaccharide gel) is generated by microbial fermentation of a polysaccharide. The substance can be heated for its solidification property.

Product features of Curdlan

Solubility : Curdlan can be dissolved in alkaline solution, but does not dissolve in water. Curdlan is insoluble in water, but it is easily dispersed in cold water, and can be handled through the high-speed mixing to form a more homogeneous dispersion. Curdlan can be completely dissolved in Sodium Hydroxide, Rrisodium phosphate, Calcium phosphate and other alkaline aqueous solutions (pH>12).

Gelatinization: the dispersed solution of curdlan can be formed to gel with thermal irreversibility after heated above 80 ℃. The colloidal gel formed from Curdlan can be divided into low and high according to its nature。Low gel (heat reversibility) : Heat curdlan aqueous dispersion to about 55 ℃ ~ 65 ℃ and cool to about 40 ℃,then it comes to form low heat reversible gel. Continue heating to about 60 ℃, it can be restored to their original state of the water dispersions. Heated to above 80 ℃ ,the low-gel will form high thermal irreversible gel. After been mixed and crushed, the crushed-low-gel still be able to form low gel and high gel again by heating. The gelatinize strength of low-gel is higher than the high one with the same density of curdlan. High gel (thermal irreversibility): Heat curdlan aqueous dispersion to above 80℃,then it comes to form strong thermal irreversibility of the high gel. Once crushed, the high-gel cannot be restored to its original state. In general conditions, y, Curdlan is used in the form of high gel in the food processing industry.

Gel strength: The gel strength of curdlan increases with the heating temperature increasing. Heat curdlan to 80℃and above ,it forms high thermal gel with irreversibility, continue heating to 130℃, the gel strength keeps rising. Gel strength increases with the rise of curdlan density.

⑴ Thermal stability: Curdlan gel has strong thermal stability. It also keep this property in food processing and high-temperature cooking in kitchen, for example,

deep-fried, microwave and other heating conditions.

⑵ Freeze-resistance: The construction of curdlan does not change in frozen and thawed process, so it can be used in frozen food also.

⑶ Hydro-dissection: occurs when curdlan gel is directly used in processed foods . Hydro-dissection increases with the climb of temperature, while decreases when curdlan’s density increases. It can be inhibited by adding available starch (corn starch, chemical starch without ageing).

2. Product Usage

Used as quality improver: Add curdlan or its dispersion to conventional food in order to improve the quality and crunchiness. To improve crunchiness, thermal stability, water retention, curdlan powder, dispersion or swelling or dissolution solution can be added. None special technique is required. General food factories could just make a simple application of adding curdlan with other raw material. Curdlan can absorb water about 100times its own quantity, so only a small amount of curdlan is needed, the general additive amount is below 1%.

Direct use of curdlan gel: this is a direct use of curdlan to produce food. Put curdlan with thermal irreversibility together with other food material, we can produce new food. It need to use higher density curdlan, and homogeneous curdlan dispersion is vital.

Other industrial applications: It is valued and applied in bio-pharmaceuticals, cosmetics, building materials industry and other industries. (Curdlan Packaging specifications: 1kg / bag, 10 bags / box)

3 Standard Usage of curdlan:

A. Use as food quality improver

1. Cooked wheaten food: Such as noodles, instant noodles and other pasta. Curdlan can increase elasticity, chewing sense, prevent burnt, slimy and soup muddy. Standard usage:0.1~1% forwheat flour.

2. Aquatic products. Curdlan can make food flexible, improve taste, prevent burnt, substitute fish and improve yield. Standard usage: 0.1 ~ 1%.

3. Meat products. Such as sausage, ham meat. Curdlan can improve water retention and firmness, improve food taste, make sausages more stable. Standard usage: 0.1 ~ 1%.

4. Cooked food, snacks. Such as hamburgers, fried chicken, dumplings, siu mai. Curdlan can improve water retention, food quality and taste, improve various types of food, remove the protein taste of soybean. Standard usage: 0.2 ~ 2%.

5. Sauce. Curdlan can increase viscosity, anti-sedimentation, improve quality. Standard usage: 0.2 ~ 2%.

6. Canned food : Curdlan can anti-drip, penetration and improve quality. Standard usage: 0.2 ~ 1%.

7.Others: Curdlan can improve cakes’ water retention during frozen, inhibit fried food’s oil absorption, absorption ion, substitute fat to achieve low-fat effects. Standard usage: 0.2 ~ 1%.

B. Direct use of Curdlan

1.Man-made meat and aquatic products.Be able to reproduce the tastes of various types of food material to enhance heat resistance, freeze, and I would replace the protein and soy protein and so on.  Standard use of 3 ~ 10%.

2. Tofu processing. Enhanced heat resistance, freeze, improved fresh sense of improvement of shape. Standard usage of 0.5 ~ 5%.

3. Fat instead of plastic. Cooked food, Meat and other processed products of low-fat foods. Standard use 2 ~ 4%.

4. Other. If frozen gel food products, edible mask and so on. A heat-resistant and frozen nature of the improvement of formability can be heated frozen gel food, mixed in starch can get a sense of fresh food. Standard use of 1 ~ 10%.



Standards (Q/SZK001-2008)



White to nearly white powder


Gel Strength

600 g/cm2 Min


Loss on drying

10% Max

At 105℃ for 2.5h


6% Max


Purity(calculated as anhydrous glucose)

80% Min


pH (1% Aqueous suspension)


GB/T 9724-2007

Nitrogen Content

1.5% Max

GB/T 609-2006


2ppm Max





Total Plate Count

10000CFU/g Max


E. Coli

30 MPN/100g Max


Package: 20kg per carton or cardboard drum

Dosage: the recommended dosage is 0.03% -6%

Storage: Keep under room temperature, stored in the original container, well closed, in dry place, protected from direct sunlight.

Shelf-life: 24months from manufacturing date in the original unopened package.

After years of exploration and production experience accumulation, we have updated our understanding and practical actions in Curdlan production, research and development, independent innovation and cooperation with customers. Our company has a complete set of pre-sale and after-sales service system to track the use of products and feedback, and provide timely and thoughtful follow-up service for customers. Your satisfaction is our biggest wish.
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