Biodegradable Tow

Tow for Cigarettes

A wide variety of fibrous materials has been suggested as filters for cigarette smoke. Cellulose acetates tow is the most commonly used filter material. One disadvantage associated with this filter material is, however, that is slow to degrade. Whilst most of the components of a spent smoking article dissociate into their individual constituent parts and degrade within a relatively short period of time when exposed to moisture and/or mechanical abrasion, cellulose acetate filter material is slow to degrade because the cellulose acetate fibres themselves are effectively not water soluble and therefore poorly biodegradable.

For disposable products, it is desirable to use materials which are biodegradable. Biodegradable polymers disposed of in bioactive environment degrade by the enzymatic action of microorganisms such as bacteria, fungi and algae. Their polymer chains may also be cleaved by non-enzymatic processes such as chemical hydrolysis. The term “biodegradable” means that the composition degrades within one year using the standard test method for deterring aerobic biodegradation of plastic materials under controlled composting conditions.

Polylactic Acid or Polylactide, is an attractive biodegradable and biocompatible polymer. It is derived from renewable resources(eg. corn, wheat, or rice) and it is biodegradable, recyclable, and compostable. In addition, PLA exhibits excellent process ability. It can be produced to biodegradable filter materials, preferably are made from materials which can be easily processed to produce fibres, which are thermally processable and which have good mechanical and physical properties.

The below specifications we can supply:

6.1Y/18,000

2.5Y/30,000 2.7Y/30,000 4.5Y/30,000

3.9Y/31,000

2.4Y/32,000 2.9Y/32,000 3.0Y/32,000

3.5Y/34,000

2.7Y/35,000 3.0Y/35,000 3.3Y/35,000 5.0Y/35,000

7.3Y/36,000

3.0Y/37,000 3.3Y/37,000

3.3Y/39,000

Some common terms:

Dernier filament is weight expressed in length unit defined as the weight in grams of 9000m of whatsoever linear material.

Dernier is a direct metric system where lower numbers are thinner dimensions and higher numbers are thicker dimensions. A single filament with a 9000m length and with a weight of 1 gram is equal to dernier 1.

Total dernier is a weight in grams of acetate strip with a length of 9000 m. The acetate title is formed both by a dernier filament and total dernier. Example: an acetate title 2.7Y35000 has a dernier per filament (or filament dernier) of 2.7 and a total dernier of 35000.

Cross section Y is the one used on the tobacco industry.

Crimp is the bending of a filament. Filaments are bent into groups and not singularly. Bending is necessary to give a certain consistency to a finished filter as well as to secure a good handling packing and storage.