SILICA
GEL SACHETS.
Silica gel sachets or bags,
are simply flexible 'containers ' of silica gel.
The sachet material has to be robust and capable of withstanding normal
handling whilst most importantly, being able to breathe. This means that water
molecules
can pass through the material and be adsorbed by the silica gel. Standard sachet
materials are tea-bag paper, fabric, cotton or Tyvek™. Some sachets have
heat-sealed seams, others are sewn.
We produce a range of standard size silica gel sachets using non-indicating (white)
or self-indicating (orange/green, orange/colourless or blue) silica gels. In the latter
case, the colours of the gels are visible through the sachet paper or fabric.
Self-indicating silica gel sachets are often useful in test situations, to confirm the
suitability of the sachet size chosen, or in cases where an item is frequently
inspected and the sachet can be replaced if it has become exhausted.
Stock sachets are as follows :
Sachets made in a
heat-sealed teabag paper.
Non-Indicating And Self-Indicating.
Small sachets are manufactured
as standard in a plain paper made from a blend of
top grade manila hemp, cellulose and thermoplastic fibres. All sachets are printed
Silica Gel Do Not Eat.
SACHET WEIGHT |
SACHET
SIZE |
1
GRAM |
48 x
30 mm |
3
GRAM |
50 x
60 mm |
| 5
GRAM |
65 x
60 mm |
| 10
GRAM |
85 x
50 mm |
Small silica gel sachets
can prevent moisture damage to electrical goods and electronic components
(internally and externally), scientific and optical instruments, communication equipment,
metallic parts,
leather goods, tools and many other small to medium sized items in use, store or transit.
For situations where the physical space for a sachet is restricted, consider capsilgels. Stock sizes for capsilgels are 0.3 gram, 0.6 gram and 1 gram.
Sachets made in a
heat-sealed non-woven fabric.
Non-Indicating and Self-Indicating.
Medium sized sachets are
manufactured as standard in a heat-sealed non-woven fabric made from a
100% viscose fibre with an acrylic binder and polyamide coating.
All sachets are printed Silica Gel Do Not Eat and usually with their weight.
SACHET WEIGHT |
SACHET
SIZE |
25
GRAM |
135 x
50 mm |
50
GRAM |
130 x
80 mm |
100
GRAM |
165 x
80 mm |
250 GRAM |
200 X
125 mm |
500 GRAM |
240 X
125 mm |
Medium sized silica gel
sachets can prevent moisture damage to larger electrical/electronic items, metallic
components and fabrications, contents of export packing cartons or crates and hygroscopic
powders.
Sachets made in a
stitched non-woven fabric or cotton.
Non-Indicating and Self-Indicating .
The 1kg sachet is stitched in
a non-woven fabric made from a 100% viscose fibre with an acrylic binder.
The 2.5 kg sachet is made as standard in cotton because of its large weight.
All sachets are printed Silica Gel Do Not Eat along with their weight.
SACHET WEIGHT |
SACHET
SIZE |
1
KG |
320 x
175 mm |
2.5 KG |
400 x
265 mm |
Large silica gel sachets can
prevent moisture damage to items in transit in packing crates and
shipping containers, large machinery and enclosed vessels such as tanks or pipes.
All sachet sizes are approximate.
High Capacity
Calcium Chloride Container Desiccants
As as alternative to using 2.5kg cotton bags of silica gel in shipping
containers,
we also stock this desiccant - please call or mail for details.
Sachets in
Tyvek™
We can make many different
sized sachets using a Tyvek™ material.
This is a very strong dust and lint free material which is ideal for sensitive
applications.
Note : self-indicating sachets are not available in Tyvek™.
Which Size Sachet To Use?
A silica gel sachet is only effective in an enclosed
environment. A physical barrier will prevent
water vapour from continually entering such an environment, leaving the finite volume
enclosed
to be protected by the silica gel.
A general rule of thumb in a 'hermetically sealed' environment, is that 5 grams of silica
gel are required
per cubic foot of enclosed volume (or 170 grams per cubic meter).
It is often prudent to err on the side of caution and use the nearest standard size sachet
over the
amount of silica gel that is theoretically required. For large volumes, using a few
well spaced smaller sachets
will reduce humidity levels faster than if using a single large sachet.
Often, environments cannot be considered 'hermetically sealed', there will be a
number of factors which will
increase the amount of silica gel that is needed. Please read Using Silica Gel.
Non Standard Sizes And Special Sachets.
The above sachets represent our standard range of off-the-shelf
items. In addition to this we are able
to manufacture sachets to any other weight that meets customer requirements.
We will also manufacture totally non-standard silica gel sachets - sachets of specific
(and unusual) shape,
sachets with loops or lengths of tape attached, sachets with velcro,
sachets in bandoliers or sachets that
are individually overwrapped in foil or poly pouches. Finally, sachets
can be made using a mixture of
materials e.g. silica gel and activated carbon.
Pricing And Packing.