Folha de termoformagem PP rígida azul de 0,5 mm em rolo

PP sheet roll materials are generally selected brand of PP sheet resin, usually used in vacuum molding is a total of PP sheet resin and modified PP sheet materials.The modified PP sheet material mainly focuses on improving the molding process performance, transparency and heat resistance, etc. The main modification has the following aspects.

A. Improve the molding performance of PP sheet roll

In order to improve the properties of PP sheet, the most commonly used method is to use polyethylene (PE) to modify PP sheet. Mixing a small amount of (20% ~ 30%) low density polyethylene (PE) in PP sheet, can make PP sheet melting property narrow, easy to flow when the sheet heating defects can be improved, can use the ordinary vacuum molding process.Of course, the addition of polyethylene will also bring some negative effects on the performance, such as rigidity and heat resistance to a certain degree of decline in the application of hollow to be considered.

B. Improve the transparency of PP sheet roll and its molding products

Adding nucleating agent (transparent agent) to PP sheet roll is an effective way to improve the transparency of PP sheet roll and its products.After the nucleating agent is added, a large number of fine crystals will be produced in the production of PP sheet roll, which will reduce or even avoid the production of large spherulites. The reduction or elimination of large spherulites will obviously improve the transparency of PP sheet. At the same time, due to the action of nucleating agent, the formation of a large number of fine crystals, so that the cleanliness of PP sheet.The rigidity of PP sheet was improved while the transparency of PP sheet roll was improved.

C. Improve the heat resistance and rigidity of PP sheet roll

The heat resistance and rigidity of PP sheet can be improved obviously by means of filling modification.The most widely used fillers are talc powder, calcium carbonate, etc.By adding 30% ~ 40% talc powder, the rigidity of PP sheet roll can be improved obviously, and the temperature can be raised to over 140℃. Meanwhile, the excellent sanitary performance and better oil resistance of pure PP sheet can be maintained, and the price is relatively low.Its molding products can be used for microwave heating.