Technical Specs & Packaging Data

Cell Sizes

Chill-Wrap is normally produced with a cell configuration measuring 78 x 75mm which absorbs 50ml (50 grams) of water. It has 177 cells per square metre and weighs 10kg per square metre when hydrated (soaked).
Chill-Wrap is supplied in cartons, with an inner polybag containing precut sheets. Standard configurations are shown in the following table.

Hydrated Weight of Different Sheet Sizes

Compressive Strength
The compressive strength exceeds 35kg per cell.

Packaging
A cardboard outer carton with a polythene liner bag contains the Chill-Wrap sheets. There are no perforations in the sheets.

Materials
The outer casing is formed from laminated polyethylene thermo-bonded to a sheet of self-sealing, non-woven polyester fabric. No adhesives are used during its construction and the plastic backing prevents adjacent sheets from sticking when freezing.

The absorbent powder is a unique formula of Sodium Polyacrylate with a free monomer level of less than 1g/kg.

The fabrics from which Chill-Wrap is made comply with USFDA Title 21 requirements for products in contact with food.

Using Chill-Wrap

The following instructions will help you achieve the longest possible shelf life for your temperature sensitive product.

Storage
Before use, Chill-Wrap ice replacement should be stored in a dry atmosphere, out of direct sunlight and with the carton sealed. Keep the opened carton closed between uses to prevent contamination from moisture and dust.

How much Chill-Wrap?
As a rule of thumb, for 15kg of chilled product use 10 Chill-Wrap cells for periods of 1 to 16 hours, 20 cells for longer periods. Please note that the amount of Chill-Wrap you use is directly proportional to the amount of heat it needs to absorb. You need to consider the heat your package will be subjected to throughout the cool chain. Small scale experiments with typical products are strongly recommended.

Soaking (Hydrating)

1. Put the required number of sheets into a tub containing plenty of fresh, potable water.
2. Each cell will absorb 50ml (50 grams) of water. No measuring is necessary.
3. Leave the Chill-Wrap sheets in the water for 15 to 25 minutes or until the cells have soaked up the maximum amount of water (they should be firm when you squeeze them).

           
Freezing
Remove the hydrated sheets and drain or shake the surface water from them.
During the freezing process the sheets may be laid on top of each other, up to 5 sheets high.
Take care to keep the plastic (shiny) surface of all sheets facing down. This will help prevent sticking.

Storing Hydrated Chill-Wrap in your Freezer
Once frozen, the sheets may be rolled or stacked flat.
Packing frozen sheets in a ventilated plastic crate and leaving them in the freezer is a common storage method.

Using

• Ideally the Chill-Wrap Ice Replacement sheets will be placed flat across the top of your product to provide even cooling. You can also place some in the bottom of the package, roll it into a cylindrical shape or wrap it around suitably shaped products.
• In general, place the sheets between the the packaging and your product rather than between layers of product. Chill-Wrap is designed to absorb heat coming into the package rather than for cooling the product itself.
• Make sure you chill your product to the desired temperature (between 0°C and 9°C) before packing. If possible, chill the outer packaging to the same temperature.
• If the frozen sheets should not directly contact the product, a thin cardboard sheet can be placed between the product and the Chill-Wrap. Leave a gap between the perimeter of the cardboard sheet and the packaging to allow air circulation.

Chill-Wrap Ice Replacement

What is Chill-Wrap?

The key ingredient of Chill-Wrap is Sodium Polyacrylate, an amazing water absorber -- it can absorb 200 to 300 times its weight in tap water (even more if the water is distilled) and hold it in a gel.

The benefit is that the gel does not release water so you can create an ice replacement which doesn't leak the way normal wet ice can. The gel also absorbs more heat than normal ice. Chill-Wrap is a combination of plastic and fabric which holds the Sodium Polyacrylate powder in cells. When it is soaked in water it absorbs measured quantities of water which can be frozen and used to replace ice.

The end result is "ice" which doesn't leak and provides very efficient cooling.

Who uses Chill-Wrap?

Anyone who needs to maintain a product at a temperature between 0°C and 9°C for periods up to 48 hours. Typical industry users are those packing and transporting live seafood, fresh seafood, fresh flowers, fresh meat, medical or veterinary samples, serum, vaccines and, believe it or not, bee and wasp larvae.

The extra cooling ability of Chill-Wrap makes it a favourite for transport by air. You get more cooling for every gram of coolant, reducing air freight costs

Reusing Chill-Wrap

Chill-Wrap can be reused up to 10 times if it is kept clean and undamaged.

What can Chill-Wrap replace?

Wet ice, gel ice and other coolants and refrigerants.