GeeJay Chemicals - Desiccant Silica Gel Sachets in the UK.

GeeJay Chemicals Ltd. UK SUPPLIER OF DESICCANT SILICA GEL AND ALLIED PRODUCTS

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 or orange/colourless) silica gels. In the latter
case, the colours 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 :

SACHET WEIGHT	SACHET SIZE
0.5 GRAM	34 x 18 mm
1 GRAM	39 x 20 mm
3 GRAM	55 x 30 mm
5 GRAM	65 x 30 mm
10 GRAM	85 x 50 mm
25 GRAM	130 x 50 mm

Small non-indicating sachets are made as standard using a heat-sealed Tyvek™ material.
This is a very strong dust and lint free material which is ideal for sensitive applications.
A 0.5 gram non-indicating minisachet is also available at 27 x 16 mm.

The self-indicating (0.5, 1, 3 and 5 gram) sachets use a heat-sealed plain paper made
from a blend of top grade manila hemp, cellulose and thermoplastic fibres.
They vary in size from the non-indicating sachets being, respectively,
40 x 30mm, 50 x 30 mm, 50 x 50 mm and 65 x 50mm.
The 10 and 25 gram self-indicating sachets are made in a heat-sealed non-woven fabric (see below).
All sachets are printed Silica Gel Do Not Eat.

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 silica gel in capsules:
0.3 gram, 0.6 gram and 1 gram. Call or e-mail for details.

SACHET WEIGHT	SACHET SIZE
50 GRAM	130 x 80 mm
100 GRAM	165 x 80 mm
250 GRAM	185 x 125 mm
500 GRAM	250 x 125 mm

Medium sized sachets both non and self-indicating 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.

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.

SACHET WEIGHT	SACHET SIZE
1 KG	320 x 175 mm
2.5 KG	400 x 265 mm

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.
Both sachets are printed Silica Gel Do Not Eat along with their weight.

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.

Variations, 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:

All standard sizes can be made in sewn non-woven fabric (or cotton) sachets where
regeneration and reuse of sachets is going to be important.
50 to 500 gram sachets can be made in Tyvek™.
Totally non-standard silica gel sachets - sachets of specific weight or 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.
Sachets can be made using a mixture of materials
e.g. silica gel and molecular sieve or silica gel and activated carbon.

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.

Pricing And Packing.

We try and sell sachets in almost any quantity that we are asked for.
They are supplied in strong cartons with heavy gauge polybags.
If required, packaging can be tailored to suit individual needs.
In general, non-indicating silica gel sachets are cheaper than self-indicating sachets and to double the
weight of silica gel does not double the cost. Prices are tiered, with price breaks as quantities increase.
All quoted prices include delivery.

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