PLA disposable tableware injection mould
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Whats is the PLA plastic?
The full name of polylactic acid is Poly LacticAcid (PLA), also known as corn starch resin, scientific name is Polylactide, which is a lactide polyester;
. Polylactic acid is a multi-purpose compostable high molecular polymer. Starch is completely extracted from plants → fermented → water removal
→ Made by polymerization and other processes, non-toxic;
. Polylactic acid (PLA) as a degradable material shows its advantages. It has good biocompatibility and biodegradability, and is derived from lactic acid made from renewable energy agricultural and sideline products. It is a relatively promising synthetic class. Biodegradable polymer materials.
Advantages of PLA
> Good mechanical and physical properties. Polylactic acid is suitable for a variety of processing methods, is convenient to process, and has a wide range of applications. At the same time, it has good tensile strength and ductility. Polylactic acid can also be produced by various common processing methods;
> Good biocompatibility and degradability;
> Polylactic acid also has good gloss and transparency, which is equivalent to the film made of polystyrene, which cannot be provided by other biodegradable products;
> Polylactic acid (PLA) film has good air permeability, oxygen permeability and carbon dioxide permeability, and it also has the characteristics of blocking odor. Polylactic acid is the only biodegradable plastic with excellent antibacterial and anti-mildew properties;
> When incineration of polylactic acid (PLA), it is half of the incineration of traditional plastics (such as polyethylene), and incineration of polylactic acid will never release toxic gases such as nitrides and sulfides.
Does PLA plastic can be injection molding?
Injection molding is the most widely used method in the processing of polylactic acid, especially for thermoplastic products with complex shapes and high dimensional accuracy requirements. Most injection molding machines based on polylactic acid injection processing are reciprocating screw injection machines
. A typical injection cycle usually starts with a tight mold as an injection cycle. After the mold is clamped, it immediately moves, opens the nozzle and the screw moves forward, and injects the polymer melt into the mold cavity to compensate for material shrinkage and mold cooling During the process, the screw retains the control pressure at the front. At the end of the pressure control phase, the nozzle is closed and the mold is cooled to a certain degree before opening the mold.
· As injection molding is a very mature molding method, the injection molding of polylactic acid is generally relatively simple.
Does PLA injection mould has any request when design?
Odin Mould has build many PLA product, such as forks,cups, plate,tableware,bowl etc. So get many exrience about mould design. Lets talk some about this:
When injection molding PLA resin, there are certain requirements for the mold, including: the mold must have a better cooling effect, and must be equipped with a cold water machine, such as a 200g injection molding machine, equipped with a 2kW cold water machine; due to the relatively thin wall injection speed of thick-walled products The product is relatively slow, so the design of the mold should control the thickness of the product to less than 4mm, and the core, cavity or front and back templates and sliding blocks of the mold need to be cooled by water, and the temperature of the mold should be controlled at 20-30 ° C. between.
If you got any PLA product need injection, welcome send us drawing or samples, we will send our solution for you. thanks.