Views: 2 Author: Site Editor Publish Time: 2022-06-08 Origin: Site
Degradable plastics can be divided into completely biodegradable plastics and destructive biodegradable plastics. Destructive biodegradable plastics mainly include starch-modified polyethylene PE, polypropylene PP, polystyrene PS, etc. This is also what the biodegradable plastic extruder can produce.
What is the classification of feeding methods of biodegradable plastic extruder?
How to choose the temperature of biodegradable plastic extruder according to different materials
What are the advantages of biodegradable plastic extruder?
①Gravity feeding:
Principle - The material enters the barrel by its own weight, including manual feeding, spring feeding, and blast feeding.
Features - simple structure and low cost. However, it is easy to cause uneven feeding, which affects the quality of the parts. It is only suitable for small size biodegradable plastic extruder.
②Forced feeding:
Principle - A device that can exert external pressure on the material is installed in the hopper to force the material into the biodegradable plastic extruder barrel.
Features - It can overcome the phenomenon of "bridging" and make the feeding uniform. The feeding screw is driven by the extruder screw through the transmission chain, so that its speed is adapted to the screw speed. The overload protection device can be activated when the feeding port is blocked, thus avoiding the damage of the biodegradable plastic extruder.
Different chemical and physical properties:
PP: In general, the temperature of the die head of the biodegradable plastic extruder can be increased by 180-230 degrees between 170-200 degrees, and it can be slightly lowered near the discharge port.
PVC: The molecular weight of industrial PVC is generally between 50,000 and 110,000, and it has a large polydispersity. The molecular weight increases with the decrease of the polymerization temperature of 37°C. Without a fixed melting point, it begins to soften at 80-85°C, becomes viscoelastic at 130°C, and becomes viscous fluid at 160-180°C.
1. High output and low energy consumption
For the biodegradable plastic extruder, the manpower, space and other costs required to produce the same quantity of products are doubled. And because of its short aspect ratio, the power of the host and the heater is reduced to save energy.
2. Good exhaust performance
The exhaust port of the biodegradable plastic extruder does not have any material accumulation, and there is no material leakage or blockage. The reason is that almost all materials are sucked into the mixing area in the center of the screw. The mixing area is equivalent to a melt pump, so it will not Pretend. Therefore, the machine can achieve a high degree of vacuum and improve the quality of the product.
Nanjing Haisi has focused on the field of biodegradable plastic extrudes for many years, it commits to providing perfect service for every customer from the chemical production and industrial production field.
