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A major polycarbonate market is the production of compact discs, DVDs, and Blu-ray discs. [13] These discs are produced by injection-molding polycarbonate into a mold cavity that has on one side a metal stamper containing a negative image of the disc data, while the other mold side is a mirrored surface.
This is an accepted version of this page This is the latest accepted revision, reviewed on 28 January 2025. Manufacturing processes This section does not cite any sources.
A process flow diagram (PFD) is a diagram commonly used in chemical and process engineering to indicate the general flow of plant processes and equipment. The PFD displays the relationship between major equipment of a plant facility and does not show minor details such as piping details and designations.
Very common. All examples form a coating between the plastic and machine parts during production. Reduces pressure and power usage in the extruder. Reduces imperfections. 2% Light stabilizers: 0.05–3: Protects against UV damage: HALS, UV blockers and quenchers: Normally only used for items intended for outdoor use: 1% Other: Various
The basic concept of the gas-assisted molding process is quite similar to the regular injection molding process. In gas-assisted molding, the plastic material is injected into the mold cavities like the regular injection molding process but only up to 70%~80% of the mold volume. The melted plastic in contact with the mold walls begins to ...
PVD process flow diagram. Physical vapor deposition (PVD), sometimes called physical vapor transport (PVT), describes a variety of vacuum deposition methods which can be used to produce thin films and coatings on substrates including metals, ceramics, glass, and polymers. PVD is characterized by a process in which the material transitions from ...
Examples include BT-Epoxy, which is one of a number of resins used in the production of printed circuit boards. Polyetherimides such as Ultem can be produced from BPA via a nitro-displacement of appropriate bisnitroimides. [51] [52] These thermoplastic polyimide plastics have exceptional resistance to mechanical, thermal and chemical damage ...
Besides plastics production, plastics engineering is an important part of the industrial sector. The latter field is dominated by engineering plastic as raw material because of its better mechanical and thermal properties than the more widely used commodity plastics .