thermosetting resins or polymers formed by chemical cross-linking which renders them permanently solid. This reaction is irreversible and, unlike thermoplastics, thermosets do not melt when heated. Typical thermosets are polyesters, acrylics, epoxies, phenolics and vinyl esters.
In a tiered supply chain, a Tier 1 company is the most important member and supplies components directly to the original equipment manufacturer (OEM) which set up the chain. Tier 2 companies supply companies in Tier 1 while Tier 3 companies supply companies in Tier 2, and so on. Tiered supply chains are common in industries such as aerospace or automotive manufacturing where the final product consists of many complex components and sub-assemblies which must comply with stringent standards relating to quality, manufacturing and business processes. In automotive manufacturing, the OEM is the vehicle manufacturer. The manufacturing plants of Tier 1 companies are generally in close proximity to their customers in order to facilitate "just in time" or "in-sequence" deliveries whereby materials and components are assembled in response to specific orders and delivered directly to an automotive assembly line in accordance with a predetermined schedule.
a process used to overdye pre?dyed denim with a tinting dye to give the correct shade of blue required. Tinting can also be used to treat fabric with a pale blue tinting dye in order to improve the whiteness of any undyed parts. This process is often carried out as an alternative to using a fluorescent whitening agent to improve the whiteness of undyed material.