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Acetate filter tow introduction very fully

Posted Date:2016-05-04 15:20:51

Acetate filter tow

The main use of cellulose acetate (CA) is for Acetate towas a material for cigarette filter rod. Acetate tow was first produced in 1952. In 2012, the quantity of manufactured acetate tow was about 811 000 metric tons.
The primary reasons for this expansion of acetate tow as the substance for cigarette filters are;
the expansion of cigarettes with filter rod and tips;
The decreasing consumption of other filtration materials like paper, cotton and polypropylene
the increasing popularity of worldwide cigarette consumption, due to the increasing population and economy.
acetate tow

Advantages of Acetate tow

As the raw material of acetate tow,and Due to the bellow advantages,Acetate tow filters was quickly capturing in more than 90% of the tobacco industry in the world;
the CA is a non-toxic, tasteless and odorless material;
CA is stable to store under varying conditions of humidity and temperature;
CA makes the stable and consistent production of filters with uniform, firm structure and a well-defined pressure drop, leading to efficient filtration;
because of its continuity, Acetate tow can be made into filters at rapid speeds and also into independently designed filters without any stop.;
Acetate tow can be hardened with a glue which neither adheres to rod making machines nor requires a solvent removal during the formation of the filter rod;
Acetate tow has the unique inherent advantage of the selective removal of phenols; nitrosamines, quinolines and other undesired smoke components;
Acetate tow plays a significant role in reducing tar yields;
Charcoal (activated carbon) combined filters have got a great success in some countries in Asia and Europe;
CA has a preferred – taste “signature”,keeps the cigarette aroma;
Cellulose and cellulose acetate are degradable substances.

The Flow of Production process

acetate tow process diagram


Characteristics of Acetate Tow

Physical properties

Acetate tow is designed by a combination of the following three characters of fiber products.
While DPF and TD are widely executed in the industry the official Si-unit is Dtexc.
1.DPF – denier per filament: DPF is the thickness of a filament defined by the weight in gram of 9,000 meters of uncrimped fiber tow. Acetate tow is available in a variety of DPF ranging from 1.5 to 9.0s, and DPF ranging from 2.5 to 3.0 is commonly manufactured in our factory,less than 2.5 and more then 3.0 is also produced under customer needs.
2.TD – total denier: TD is the thickness, total mass, of a tow band defined by the weight of 9,000 meters of uncrimped tow. Acetate tow is available in a variety of TD ranging from 15,000 to 50,000, and commonly TD from 25,000 to 35,000 are manufactured.
3.Cross section: Y-shaped cross section is standard for the cigarette filter application. Y-shape is well known to be the most efficient and economic shape in the filtration/weight ratio.
Acetate tow grades or Size are defined by the above three characters. For example, 3.0Y35,000 stands for the tow of DPF=3.0 and TD=35,000 with Y cross section. Crimp structure and moisture content are also important properties which have effects on the productivity and quality of filter rods manufactured.


Item Standard Technical Requirement Test Method

Item

Standard

Technical Requirement

Test Method

Total Tow line Density Dtex

35000

+-300

YC/T169.1--2002

Tow Line Density Variation Coefficiency %

<=0.6

<=0.6

YC/T169.1--2002

Single Yarn Density Dtex

3.0

+-0.2

YC/T169.2--2002

Crimp Number/25mm

22

+-3

YC/T169.3--2002

Tow Fracture Strength N/Ktex

>=7

>=7

YC/T169.5--2002

Section Shape

Y

YC/T169.6--2002

Water Content%

<=7

6.0+-2.0

YC/T169.8--2002

Oil Content%

0.8%-1.5%

0.8-1.5

YC/T169.9--2002

Acetone Residual%

<=0.3

<=0.3

YC/T169.10--2002

Titanium Dioxide Content%

0.4+-0,2

0.4+-0.2

YC/T169.11--2002


Filter rod making

Acetate tow is processed into filter rods before being cut into cigarette filter tips. On the filter rod making machine, Acetate tow undergoes stretching and relaxation, called ―blooming to form a web structure of tow. And then it is transformed into filter rods together with wrapping paper strip and paper glue. In the blooming process, glyceryl triacetate, plasticizer of cellulose acetate, is applied onto the surface of tow filaments. Glyceryl triacetate as a bonding agent makes the fibers stick together to form a three-dimensional matrix network to increase the hardness of produced rods.

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