A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

A

• ASR or Automotive shredder residue
Materials that cannot be recycled and are shredded before being dumped into landfills. Also called fluff.

• Autoclave
Boiler equipment in which laminated glass is kept at a given pressure and temperature in order to allow the interlayer to "melt" and permanently link the glass panes.

C

• Cleaner
A chemical product that is applied on the glass surface with a felt pad in order to remove dirt and oily materials.

• Complexity
The complexity of a glass is defined by several parameters, including :
- its main and cross curvatures
- its variations in bending radii
- its minimum radii of curvature

• Compression set
Property of a material to return to its initial stage after it has been compressed for a certain time. Measured in percentage at room temperature and at 70°C. EPDM has the best compression set among elastomeric materials. Not to be confused with elastic recovery.

• Cross curvature
Measures the maximum height (or beam) of the glass in its longitudinal dimension across a line drawn between its edges. This cross curvature can be taken in the middle of the glass or on its sides. See also main curvature.

• Cullet
Small pieces of broken glass

D

• Double component
Usually used to describe a polyurethane material that is formed by mixing two liquid components. See also mono component

• Double curvature
See Cross curvature.

E

• Elastic recovery
Maximum length to which a material can be pulled and still return to its initial stage without damage. Measured in percentage. Not to be confused with compression set.

• ELV or end-of-life vehicle
Vehicles that are discarded

• Enamel
A product made of glassy materials that is used to hide the car bodywork and protect the adhesive used to glue the glass on the car body from being damaged by UV rays. It is opaque and generally black. It melts at around the same temperatures as glass. Since January 2003, Saint-Gobain Sekurit uses only lead-free enamels.

• Encapsulation
Process that consists of putting a plastic profile on the rim of a glass by injecting a polymer inside a mould.

• Energy transmittance
Defines the percentage of radiated energy that goes through a glass pane.

• Extrusion
Process that consists of extruding a polymer through a die in order to obtain a profile with a certain shape. Extrusion on glass is the process that consists of directly extruding this profile on the glass surface. Profiles can also be extruded infinitely, then cut into lengths and assembled on glass.

F

• Fluff
See ASR

• Flush
A glazing edge is said to be flush when its glass surface is tangential to the nearest surface of car bodywork, making a continuous and smooth surface.

L

• Light transmittance
Defines the percentage of visible light (wavelengths range from 380 to 780 nm) that goes through a glass pane.

M

• Main curvature
Measures the maximum height (or beam) of the glass in its transversal dimension across a line drawn between its edges. This main curvature can be taken at the bottom or the top edges of the glass. See also cross curvature.

• Module
A glazing or glass module is a glass window that includes the actual glass and elements to make assembly on the car bodywork as easy and efficient as possible. For example, a glass fitted with an extruded or an encapsulated profile is a module

• Mono component
Usually used to describe a polyurethane material made of one component as opposed to double component polyurethane.

P

• PMV (Predicted Mean Vote, ISO 7730)
This corresponds to the average thermal comfort feeling for a person in a given environment. PMV is measured over a scale from -3 to +3 (-3 is very cold, 3 is very hot). The comfort area is located between -0.5 and +0.5.

• PPD (Predicted Percentage of Dissatisfied, ISO 7730)
This gives the percentage of people who feel thermal discomfort. PPD is directly linked to PMV. The comfort area is achieved below 10 %.

• Pre assembly
Process that consists of manually or automatically various elements on a glass in order to make it easier to mount on the car body.

• Primer
A chemical product that is applied to the glass surface with a flat pad in order to enhance the adhesion of a glue or a polymer.

R

• Recycle / Recyclability / Re-useRecovery
Three different meanings can be given to the word "recycle":
1) reuse : operation in which components are used for the same purpose for which they were designed
2) recycling : reprocessing the waste materials for the original or other purposes, but excluding energy recovery
3) energy recovery : use of combustible waste as a means to generate energy through direct incineration with or without other waste, but with heat recovery.

S

• Silk screen print
A "silk screen" is used when applying enamel to the glass surface; the enamel can seep through very small holes made in the "silk screen" in order to reproduce a logo or text on the glass surface.