Toothbrush bristles are made of natural bristles and nylon filaments. Natural bristles Qinggu effect and the ability to absorb toothpaste better than nylon, but it also has shortcomings, that is, it is more absorbent, dry very slow, and therefore relatively easy to poison. Nylon silk slender and soft, can clean the teeth of the gap, and the elastic force better, better massage effect, coupled with its wear-resistant, non-absorbent properties, it became the material of choice for bristles.
Bristles have fur, hair, bristles three. Straighten the bristles directly on the back of the hand. If there is a tingling sensation during light pressing, the bristles are harder. Tough bristles easily lead to gingival recession, wedge-shaped defects appear on the teeth and neck; too soft bristles can not play a role in selling teeth surface. Therefore, the choice of moderate hardness toothbrush is more appropriate.
The handle is soft rubber, the head of the hair is nylon, DuPont hair with the United States demanding.
Brush tube is manufactured by extrusion molding, the manufacturing process: the granular or powdered plastic placed in the injection machine barrel heated to soften with a push rod or a rotating screw continuous extrusion die The shape of the mouth is the cross-sectional shape of the desired product, the length of which depends on the requirements) and the desired product after cooling.This method is usually used to process continuous tubes, bars or sheets.