Cellulose Film

Cellulose film is produced from high purity cellulose in the form of ‘dissolving’ pulp. This is obtained from natural wood which consists mainly of cellulose and lignin, roughly in the ratio 70:30. To remove the lignin the wood, having been debarked and chipped, is ‘digested’ with various chemicals. Two of the most common processes for producing dissolving pulps are the ‘sulphite’ process and the ‘sulphate’ process.