| HOW TO PRODUCE MODIFIED STARCH | |
| Derivative | @Starch derivative is a modified starch that hydroxyl group of anhydrous glucose group is substituted with various functional groups. By inducing hydrophilic group, gelatinisation-starting temperature becomes lower. The transparency and the stability of paste are improved. Combining multi-functional groups to more than two hydroxyl groups, heat resistance, chemical resistance and shearing resistance are improved. It is also possible to combine some different modifications and processes. It has extensive applications such as medical, papermaking, textile and other fields. |
| Decomposition | @Decomposing starch by heating with acid and hydrolyzing starch with enzyme are called Dextrin. Soluble in cold water and high concentrated paste is obtainable. Hydrolyzed starch by organic or inorganic acid is called Soluble Starch and soluble in hot water and high concentrated paste is also obtainable. Being used widely in medical, dyestuffs and many other fields. |
| Pregelatinization | @Pregelatinized starch is obtainable by drying quickly the paste in swollen or dissolved state. This modified starch can be swollen in cold water and easily becomes paste. Pregelatinized starch is classified into two categories; one is pregelatinized maintaining characteristic of native starch and another one is pregelatinized the modified starches such as derivative starch or soluble starch. Food, feed, paper making and many other industries are utilizing them. |
| Others | @High fluid granulated starch with even and spherical granules and sterilized and dried starch, strictly controlled water and bacterium, are available for food and pharmaceutical uses. For pharmaceutical grade, we test it carefully under Japan Pharmacopoeia regulation. Oil absorbing starch, which is absorbing liquid oil and turning it to powder, is also available. |
| Natural Gum Derivative | @This is produced inducing functional group into hydroxyl group of natural gum. It is easily swollen up in cold water. High viscosity solution is obtainable even in low concentration, while it is rather hard in starch, and it is suitable to textile printing binders and industrial thickeners. In case of textile printing use, it improves chemical resistance and also very effective in removing printing binder. |
| CHARACTERISTIC FACTORS OF MODIFIED STARCH | |||||
| @Starch shows various characteristics after modifying (or processing). The following chart shows the characteristics and conditions. | |||||
| Characteristic Factor | Type or Condition | Related Word | |||
| Solubility | hot water | cold water | pregeratinization | ||
| Gelatinized Temperature | high | low | swelling | ||
| Viscosity@T | high | low | thickening | ||
| Viscosity@U | long@ | short | fluidity, newtonian, stringiness | ||
| Stability of paste | good | bad | retrogradation | ||
| Moisture | much | little | hygroscopicity | ||
| ion | anion | nonion | cation | cohesion | |
| Emulsifiability | good@@@@@@@@@ | bad | compatibility | ||
| water retention | high@@@@@@@@@ | low | water absorption | ||
| film property | good | bad | elongation, strength | ||
NIPPON STARCH CHEMICAL CO., LTD. E-mailFsales@nichidene.com