The difference between TPU and PP?

TPU is a polymer, a material between rubber and plastic. The industry's full name is thermoplastic polyurethane elastomer rubber, which has the characteristics of abrasion resistance, oil resistance, good elasticity, and has a relatively broad hardness. Because the material has the characteristics of plasticity and solubility, TPU is widely used in daily necessities, sports toy products, and decorative materials.

PP is made of polypropylene, which is a linear polymer with high density, no side chains, and high crystallinity. The melting point of PP material can reach 167°C. Because of its non-toxic and harmless characteristics, it is widely used in the field of daily necessities such as drinking water bottles.

Since TPU is not completely non-toxic and harmless, it is more used in daily necessities such as water cups for handles, carrying rings, cup sleeves and other products that do not directly contact with water. PP will be used to make cup lids, cup bodies, etc.

At the same time, TPU is different from silica gel. Although it has similar performance in some hardness ranges, the hardness range of silica gel will be larger. Because silica gel is also non-toxic and harmless, it will also be used in the body and sealing ring of the folding water cup.

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