产品定义：
丝胶是包覆在蚕丝丝质外层的胶体蛋白质。微黄色粉末，易溶于水，茚三酮反应呈阳性。PH值5－7
Sericin is a kind of protein surrounding fibroin (silk protein), yellowy powder and soluble in water with pH value between 5 to 7 and positive ninhydrin reaction.
应用特性：
1、丝胶中丝氨酸和天门冬氨酸等极性侧基氨基酸极高。是一种亲水基团极丰富的蛋白质。In sericin, about 80% of the amino acid has hydrophilic lateral groups, about 1/3 is serine whose water absorption is 50 times more than that of glycerin. So sericin, as raw material of cosmetics, has excellent moisture absorption and Anti-microbe ability.
2、丝胶在头发上的成膜性极好，，可作头发定型剂。
Sericin protein can generate membrane on hair surface, which has nice luster, feels well and spring, and is also suitable for hair shaping. It can prevent chemicals adhering to hair and avoid the harms to hair too.
3、对开发延长乳类食品的保鲜期的添加剂具有非常显著的价值。
Sericin has good ability of anti-oxidation and can restrain the activity of polyhphenol oxidase (PPO) in food. It is also a good natural anti-oxidant especially for rich grease food, cream and milk products.
4、用丝胶蛋白为主要原料，通过交联剂交联，在化纤、内衣、床上用品、亲肤用品、皮革等制品上涂层Sericin has been widely used in fiber coating, such as under-dress, bed sheet and leather, due to its skin caring, anti-microbe, and comfort effects.
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