What are additives in plastic used for?
In plastic materials used in most products the basic polymer is incorporated into a formulary (plastic compound) with different ‘additives’, which are chemical compounds added to improve the performance (e.g. during shaping of the polymer, through injection moulding, extrusion, blow moulding, vacuum moulding, etc.).
How are additives used in polymers?
Additives are chemicals added to the base polymer to improve processability, prolong the life span, and/or achieve the desired physical or chemical properties in the final product. Once the additives are added, the polymer blend is referred to as a masterbatch and is processed accordingly.
What is polymer additive manufacturing?
Additive manufacturing (AM) describes the technologies used to create 3D objects by incorporating layers of material. With the rapidly growing technology, components used in additive manufacturing range from the classic polymers, metals, ceramics, and glass, to the biochemical materials used in medicine and food.
What are the different types of plastic additives?
Lubricants and Flow Promoters Typical external lubricants are metallic soaps, fatty acids, paraffin and low MW polyethylene. These compounds migrate to the interface between the molten resin and the metal surface of the processing equipment and reduce friction.
What are the four additives when recycling a plastic?
To deliver what the customer is asking for, recyclers can use additives such as peroxides, antioxidants, chain extenders, elastomers, colorants, performance modifiers and nucleators to restore diminished properties or to compensate for undesirable attributes.
What additives are used in polyethylene?
Additives commonly added to polyethylene include antioxidants (hindered phenolics and phosphites for process stabilization), antiblock compounds (e.g., silica, talc, and kaolin to reduce sticking of adjacent film layers), and slip agents (e.g., erucamide and oleamide to reduce friction).
What are the different types of additive manufacturing?
Types of Additive Manufacturing Processes
- Binder Jetting. Binder jetting, also known as material jetting or inkjet powder printing, is among the most common additive manufacturing types.
- Directed Energy Deposition (DED)
- Material Extrusion.
- Powder Bed Fusion (PBF)
- Sheet Lamination.
- Vat Polymerization.
- Material Jetting.
What is the best additive manufacturing process?
As far as polymers are concerned, the most popular additive manufacturing processes are photopolymerization, material jetting, powder bed fusion, and material extrusion. The materials used in these processes can be in the form of liquid, powder, or solid (formed materials such as polymer film or filament).
What are some different types of additives in plastics and what are some properties that they affect?
Plastics Additives
- Plasticizers. Plasticizers improve the flexibility and durability of plastics.
- Impact Modifiers.
- Lubricants and Flow Promoters.
- Fillers / Extenders.
- Flame Retardants.
- Antioxidants & Other Stabilizers.
- Thickeners / Rheology Modifiers.
- Tackifier Resins.
What is fillers and additives?
Additives and fillers are organic or inorganic compounds that are introduced into a plastic in order to change the properties of the plastic. While most plastics in their original form are impact resistant and long-lasting, they are often brittle, hard, combustible, or too heavy for the intended use.
What additives are used in polypropylene?
Anti-Aging Additives Polyolefins (PO) are readily degraded by oxidation, thus antioxidants are frequently used in polyethylene (PE) and polypropylene (PP).