Here you can read about the different types of plastic our bags are produced in.

Polyethylene (PE):

A thermo plastic synthetic material produced by the combustion of gases.

Polyethylene is divided into two categories: PE-HD and PE-LD. At Joka we use PE-LD which is a soft and flexible material. PE-LD is durable and does not break easily.

When PE-LD is incinerated, Co2 and H2O are formed and the material disappears and subsequently becomes part of nature’s circulation.

All our PE bags are food approved.

Polypropylene (PP):

Is polymer which can also be formed as fibres. Fibres have a low density and float on water and do not absorb moisture.

Polypropylene is a bit more inflexible and transparent in appearance than Polyethylene. The bags are almost crystal clear. The bags get scratches more easily than the PE bags.

All our PP bags are food approved.

Borstar Polyethylene:

Is Polyethylene which has gone through a process making the film extremely durable.

The film is more durable and markedly stronger than ordinary PE and the colour is a little milk-white. Borstar film can be dyed and printed as ordinary PE.

Borstar is suitable for bags which are to stand a lot of wear and to be dirt-and water-repelling.

Borstar is food approved.


The following additives may be added to all Joka’s plastic bags.

Antistat bags (ESD)

Antistatic bags are used for the safe handling and packaging of electronic components, assemblies and parts.

The bags are designed to provide ESD-sensitive products with protection against electromagnetic fields and drainage when the products are taken outside the secure working area, for example during transport or storage.

ESD is added to the foil as an additive, and the foil is usually dyed (in a transparent colour) to indicate that it contains ESD.

UV-protective bags

UV-protective bags are used to protect light-sensitive products from the harmful rays that can break down and destroy the products. The foil is treated with an additive that absorbs UV rays. The shelf life may vary (depending on the additive), and it is therefore recommended that you attach the expiration date to the bags.