Training Bulletin #31 Polycarbonate Windows (Lexan) Flashcards Preview

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Flashcards in Training Bulletin #31 Polycarbonate Windows (Lexan) Deck (12)
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1

Lexan is used where?

Where windows are subject to attack by vandals, rioters, or burglars (banks).

2

What are the characteristics of lexan?

- impact strength
- heat resistance
- dimensional stability
- transparency
- ease of fabrication
- resistance to ultraviolet light
- self- extinguishing

3

What is lexan made of?

polycarbonate thermoplastic

4

What range of temperatures is lexan used in?

-60 degrees to 280 degrees F

5

At what temperature will Lexan start to soften?

350 degrees F

6

What is the thickness of lexan windows for NORMAL use and SPECIAL uses?

- Normal: 1/8" to 1/4"
- Special (banks): 1 1/4"

7

What ways can Lexan be identified compared to glass?

- Softer surface
- When hit with hard instrument makes dull plastic sound
- Surface scratches very easy
- Wavy surface and obvious distortions on large windows

8

How can Lexan windows be cut?

Rotary saw using a CARBIDE tipped wood cutting blade
**Lexan has to be cut on all sides, it will NOT "crack out".

9

What cuts should be made first, vertical or horizontal?

Horizontal

10

Are striking tools effective on lexan?

Only when the entire panel can be "punched through" the frame.

11

How is the lexan installed?

Bolted or pop-riveted to the frame to prevent "punch through."

12

In a multi-pane window the _ may be cut allowing the panes to be pushed in.

mullions (vertical bars between panes of glass in a window)