Advantages of High-quality PP Pencil Case - Why do we choose PP material for our pencil case?

An expert in the field of stationery - Quanzhou Licheng Lizhong Jiayue Stationery and Craft Factory Co., Ltd. Today we will introduce you the advantages of High-quality PP Pencil Case - Why do we choose PP material to make stationery boxes?
PP material is not toxic. PP material is polypropylene. It is a kind of resin, it is a kind of linear polymer with high density, no side chain and high crystallinity, and has good comprehensive properties. The advantages of PP materials in terms of performance are reflected in solvent resistance, oil resistance, and weak acid and alkali resistance. It has advantages over other engineering plastics.

The processing temperature of PP material during production is about 180-240 degrees Celsius, and its chemical composition is still very stable at such a high temperature, so if it is made into a plastic cup, even boiling water or heating it in a microwave oven will not cause PP There is a problem of decomposition of material products. This plastic is also very stable after rainwater, the absorption rate in water is only 0.01%, and the molecular weight is about 80,000-150,000. Molding performance is also excellent, but shrinkage is slightly greater, and thicker-walled products made from this material tend to dent.
The performance of pp material:

1. The pp material has very good physical and chemical properties. Its molding performance is very good, but due to the relatively large hand shrinkage of this material, it still cannot be produced for some high-precision products. At that time, the gloss of the pp material is very good, and it is very easy to color.

2. The crystallinity of pp material is very high, and its structure is very regular, so it has very good mechanical properties. It has very good stretchability. And it also has a very outstanding performance, that is, its resistance to bending fatigue is superb, and it can withstand hundreds of bends without damage.

3. The pp material also has excellent heat resistance, and it can sterilize the product at a temperature of more than 100 degrees Celsius. It can be used in very harsh environmental conditions. In addition, it is corrosive to two high-strength corrosive substances such as concentrated sulfuric acid and concentrated nitric acid, and has very good stability for any other chemical reagents. So it has strong corrosion resistance.