Vacuum Deposition onto Webs, Films, and Foils
Written to guide operators and engineers as an onsite consultant would, this unique reference provides a broad appreciation of roll-to-roll vacuum deposition systems and processes.
TABLE OF CONTENTS Vacuum Deposition onto Webs, Films, and Foils
Chapter 26: Hazards
Overview
Hazards represent a potential cost, either through an injury to an operator or loss of production. Accident prevention is often regarded as a cost but ought to rather be regarded as a cost benefit. A small outlay in prevention can prevent a larger cost in compensation, fines, sick pay, loss of production, etc.
Everything can be viewed as a potential hazard and so there needs to be a modicum of common sense applied when assessing all the aspects of the vacuum deposition process. [1 ,2 ] Some products have special requirements such as the manufacture of pyrotechnics and these will often have additional requirements.[3]
26.1 Risk Assessment
It is possible to get carried away by accident prevention and to imagine all kinds of disaster scenarios. One way of doing a risk assessment is to take each possible hazardous action and look at and score the likelihood of occurrence, the degree of possible harm, frequency of exposure, and number of people involved. These results are then multiplied together. The results will fall on a scale ranging from negligible risk through to unacceptable risk.
Using the scores as shown in Fig. 26.1, any process can be assessed. An example is shown in Fig. 26.2 for a trapping hazard in a winding system. The scores given are used for example only and should not be regarded as exact. Different systems may score differently.
| Likelihood of Occurrence (LO) | Frequency of Exposure (FE) | ||
| 0 | Impossible | Cannot happen under any circumstances |
Copyright William Andrew, Inc. 2007 under license agreement with Books24x7
