Patent EA-003238-B1 (EA)
Title: High performance cigarette filter
Inventor: TEUFEL EBERHARD
IPC: A24D3/02
Filed: 2000-10-20
Abstract: 1. A high-performance cigarette filter with mechanical disintegrability and based on cellulose ester fibres or filaments, characterised in that a) the fibre weight (or filament weight)/draw resistance ratio S based on the filament titre is greater than approx. 0.7, wherein the S value is calculated according to the formula: S = (mA/DeltaP7.8)/dpf [10 m/daPA] where mA = fibre weight [g], DeltaP = draw resistance [daPA], and dpf = filament titre [dtex] and for the draw resistance the value converted for a diameter of 7.8 mm is used, b) the residual crimping of the filter material does not exceed the value of 1.45, c) the fibre weight is maximum 10 mg/mm of filter length, and d) the hardness of the cigarette filter exceeds approx. 90% of the filtrona hardness. 2. A high-performance cigarette filter according to claim 1, characterised in that the cellulose ester material is cellulose acetate. 3. A high-performance cigarette filter according to claim 1 or 2, characterised in that the cigarette filter according to the CBDTF test after a 10-week test period has a weight loss of at least 40%. 4. A high-performance cigarette filter according to any one of claims 1 to 3, characterised in that the cellulose ester material is thermoplastic and provided a plasticiser is used, it is uniformly distributed in the fibres and filaments. 5. A high-performance cigarette filter according to any one of claims 1 to 4, characterised in that a water soluble adhesive is present on the surface of the fibres and filaments. 6. A high-performance cigarette filter according to at least one of the preceding claims, characterised in that the residual crimping is between approx. 1.05-1.4, in particular between approx. 1.1-1.3. 7. A high-performance cigarette filter according to at least one of the preceding claims, characterised in that the cigarette filter is produced from a fibre strip having a multiple width. 8. A high-performance cigarette filter according to at least one of the preceding claims, characterised in that the cigarette filter is produced from a fibre strip that was before separated into several strips. 9. A high-performance cigarette filter according to at least one of the preceding claims, characterised in that the thermoplastic fibres and filaments contain cellulose acetate, in particular cellulose-2,5-acetate, cellulose butyrate, cellulose acetate butyrate, cellulose acetopropionate and/or cellulose propionate. 10. A high-performance cigarette filter according to at least one of the preceding claims, characterised in that when a plasticiser is used the plasticiser content is between 1-40%. 11. A high-performance cigarette filter according to at least one of the preceding claims, characterised in that when a plasticiser is used it is triacetin, triethylene glycol diacetate and/or citric acid diethylester. 12. A high-performance cigarette filter according to at least one of the preceding claims, characterised in that the thermoplastic fibres or filaments are based on cellulose acetate with a degree of substitution of approx. 1.5-3.0, in particular approx. 2.2-2.6. 13. A high-performance cigarette filter according to at least one of the preceding claims, characterised in that the water soluble adhesive are on the form of polyethylene glycols, water soluble ester or ether, starches and/or starch derivatives, p-polyvinyl alcohols, p-polyvinyl acetates. 14. A high-performance cigarette filter according to claim 1, characterised in that the fibre weight(or filament weight)/draw resistance ratio S based on the filament titre is maximum 2, in particular in the range of approx. 0.8-1.3. 15. A high-performance cigarette filter according to at least one of the preceding claims, characterised in that the fibre weight (or filament weight) is at least 4 mg/mm of filter length, in particular 5-8 mg/mm of filter length. 16. A high-performance cigarette filter according to at least one of the preceding claims, characterised in that the filtrona hardness of the cigarette filter is approx. 90-95%, in particular approx. 91-93%. 17. A high-performance cigarette filter according to at least one of claims 3 to 16, characterised in that the cigarette filter has a weight loss of at least approx. 50% by weight according to the CBDTF test. 18. A high-performance cigarette filter according to at least one of the preceding claims, characterised in that the cellulose ester fibres and filaments contain additives in the form of photoreactive additives, additives promoting the biological disintegrability, additives with selective retention action and/or dye pigments. 19. A high-performance cigarette filter according to claim 18, characterised in that as photoreactive additive a finely dispersed titanium oxide of the anatase type with an average particle size smaller than 2 mum is used. 20. A high-performance cigarette filter according to claim 18, characterised in that organic acids or acidic carboxylic acid ester, polyphenols and/or porphyrin derivatives are used as additives.