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Analysis of dental glue is used to meet the needs of baby teeth itch, through sucking and clenching glue, to promote the coordination of the baby's mouth and hand, not only to promote the growth of baby teeth, but also to promote intellectual development, the baby is frustrated unhappy, tired want to sleep or lonely, but also through clenching glue to obtain psychological satisfaction and security.

Natural rubber has a series of excellent physical and mechanical properties, is the best comprehensive performance of rubber. Natural rubber has both advantages and disadvantages. The following is a brief introduction of the advantages and disadvantages of natural rubber and its application.

Latex is a natural material taken from rubber tree SAP, they are extremely precious, because every day each rubber tree can only produce 30cc latex juice, latex products made of raw materials called latex products, such as children's toys, pet toys, baby tableware and so on.

Physical properties of natural rubber: Generally, it is a flake solid with a relative density of 0.94, refractive index of 1.522, and elastic film content of 2 ~ 4MPa. It softenes at 130 ~ 140℃, becomes sticky at 150 ~ 160℃, and begins to degrade at 200℃. High elasticity at room temperature, slightly plastic, crystallization hardening at low temperature. Good alkali resistance, but not strong acid resistance. Insoluble in water, low ketones and alcohols, in non-polar solvents such as trichloromethane, carbon tetrachloride can swell.

1. Different ingredients: Synthetic rubber is a highly elastic polymer made by artificial synthesis. Also known as synthetic elastomers, it is one of the three major synthetic materials, and its output is only lower than that of synthetic resins (or plastics) and synthetic fibers. The classification methods are diverse, the development history is long, and the research prospect is broad.

Children always have a great passion for toys, toys become an important part of the child's development process, can bring the child's ability to improve and intimate company,