The via holes permitted flux volatile ingredients to outgas
and escape during reflow, and for some of the flux residue to drain to the back side of the board.
The vacuum seal is necessary both to define the outgassed volume and to prevent upstreaming of the damaging outgas
components to the multilayer mirror and into the storage ring.
Odorless, tasteless, non-leeching or absorptive, these chemically inert tubes are designed to handle high purity applications where high temperatures and/or corrosive applications cause extractables to outgas
Moreover, SI does not outgas
or particle shed, therefore, it does not contaminate the product it is protecting.
Newly-laid synthetic carpeting - as well as its backing, padding and adhesives - can "outgas
" into office air a slew of chemicals (including formaldehyde) which are believed to play a role in "sick building syndrome," a condition in which chemical contamination and poor ventilation cause workers to become ill.
The layers are permanently dissipative and do not lose electrical properties or outgas
and contaminate in clean-room environments.
For example, many processes will generate heat sufficient to raise part of the system temperature to a level where materials that are adequate at room temperature might start to outgas
It will not outgas
in an ultra-high vacuum and does not react with most molten metals, salts and acids.
The completely inert material will not outgas
in ultra high vacuum and is unreactive with most molten metals, salts and acids.
She says that polyurethane-filled furniture cushions and padding, synthetic threads, polypropylene webbings and treated wood products all have the potential to "outgas
" toxic chemicals, thus creating an unhealthy and unsafe environment.
During and after painting, these VOCs outgas
and can cause adverse short-term health effects such as headache, nausea, dizziness, and eye, throat, and lung irritation.
Studies from past shuttle missions have indicated that many materials can "outgas
" trace contaminants of various kinds, too rarefied to matter in some applications but potentially ruinous to sate-of-the-art astronomical detectors.