Coffee Cup PS Lids are very common, but many people are interested in the material of PS lids. Let’s talk about the advantages and disadvantages of PS:
The advantages of PS materials are mainly as follows:
1. The water absorption is very small, and it does not need to be dried before molding. The mold temperature is 30-60 degrees, and the material temperature is 140-200 degrees.
2. It is brittle and easy to crack, has a large thermal expansion coefficient, and is prone to internal stress.
3. Good fluidity, pay attention to the mold gap to prevent shrinkage and flash.
4. It is advisable to use high material temperature, high mold temperature, and low injection pressure. Prolonging the injection time is beneficial to reduce internal stress and prevent shrinkage and deformation. However, if the material temperature is too high, silver wires are prone to appear, the material temperature is low, or the mold release agent is too much. The transparency is poor.
5. Various types of gates can be used, the demolding angle should be large, and the ejection force should be uniform to prevent cracking.
6. The wall thickness of the plastic parts is uniform, preferably without inserts, and all sides should be connected in an arc, and there should be no gaps or sharp corners.
Are PS plastic materials toxic?
There are many kinds of plastic products. Polyethylene PE and polystyrene PS are just two of them. Compared with these two, PS products are more toxic. PS plastic products are available on the market and are used as little as possible. Generally, cups that meet national standards are non-toxic when filled with boiling water. For example, PET materials can be decomposed at a high temperature above 200 degrees Celsius. Therefore, you can use plastic cups from regular manufacturers with complete peace of mind. As far as I know, do this type of The materials of the cup are PE, PP, PET, other PVC and PS are less used.
If you want to know more product information, you can click here: https://www.pando-group.com/product/lids-sleeves/
