MARKED CELLULOSE ACETATE FIBRES, MANUFACTURING METHODS AND PRODUCTS COMPRISING SUCH FIBRES

Abstract

The present invention concerns a process for the manufacture of marked cellulose acetate fibres, an apparatus for marking cellulose acetate fibres, a process for the detection of at least one information item on marked cellulose acetate fibres or on products comprising marked cellulose acetate fibres, a process for the manufacture of a tow bale comprising marked cellulose acetate fibres, a tow bale, a tow, a filter and a cigarette comprising marked cellulose acetate fibres.

Claims

1. A process for the manufacture of marked cellulose acetate fibres comprising: providing a plurality of cellulose acetate fibres; and depositing a marker comprising at least one polynucleotide onto at least a portion of the cellulose acetate fibres, thereby marking the cellulose acetate fibres.

2. The process according to claim 1, wherein the at least one polynucleotide comprises from 6 to 200 nucleotides.

3. The process according to claim 1, wherein the at least one polynucleotide has a non-natural nucleotide sequence.

4. The process according to claim 1, wherein the at least one polynucleotide encodes information comprising at least one information item selected from the group consisting of producer, date, place, batch, fibre characteristics and product line.

5. The process according to claim 1, wherein the manufacturing process comprises: (a) spinning cellulose acetate fibres from a dope comprising a solvent and cellulose acetate; (b) forming tow from the cellulose acetate fibres; (c) crimping the tow; and (d) drying the tow; wherein the at least one polynucleotide is deposited onto at least a portion of the cellulose acetate fibres between or during either of steps (a) to (d).

6. The process according to claim 5, wherein the at least one polynucleotide is deposited onto at least a portion of the cellulose acetate fibres between steps (c) and (d).

7. An apparatus for marking cellulose acetate fibres comprising: a transport system adapted to transport the cellulose acetate fibres in a direction of a polynucleotide marker delivery apparatus positioned at a location along the transport system; wherein the polynucleotide delivery apparatus comprises one or more outlets, adapted to deposit at least one solution comprising polynucleotide marker through the one or more outlets onto at least a portion of the fibres; and thereby marking the fibres.

8. A process comprising: obtaining a sample of the cellulose acetate fibres marked with at least one polynucleotide or on products comprising cellulose acetate fibres marked with at least one polynucleotide; assaying the sample of cellulose acetate fibres marked with at least one polynucleotide or the products comprising cellulose acetate fibres marked with at least one polynucleotide to identify the nucleotide sequence comprised in the at least one polynucleotide; and detecting the at least one information item selected from the group consisting of producer, date, place, batch, fibre characteristics and product line comprised in the nucleotide sequence of the at least one polynucleotide.

9. The process according to claim 8, comprising: providing a plurality of cellulose acetate fibres; depositing at least one polynucleotide marker onto at least a portion of the cellulose acetate fibres; producing marked cellulose acetate fibres; and manufacturing a product comprising cellulose acetate fibres marked with at least one polynucleotide.

10. The process according to claim 8, wherein the assaying of the sample of cellulose acetate fibres marked with at least one polynucleotide or the products comprising cellulose acetate fibres marked with at least one polynucleotide to identify the nucleotide sequence comprised in the at least one polynucleotide comprises a PCR technique.

11. A process according to claim 5, comprising the steps of (e) baling the tow and (f) packaging the tow bale.

12. A composition comprising cellulose acetate fibres marked with at least one polynucleotide marker.

13. The composition of claim 12 comprising a tow or tow bale comprising cellulose acetate fibres.

14. The composition of claim 13 comprising a filter comprising cellulose acetate fibres marked with at least one polynucleotide marker.

15. The composition of claim 14 comprising a cigarette comprising cellulose acetate fibres marked with at least one polynucleotide marker.

Description

EXAMPLE 1

[0034] A 12-mer oligonucleotide, encoding producer, product line and date was diluted in aqueous solution to a concentration of 2 g/m.sup.3.

[0035] This oligomer solution was applied to the cellulose acetate fibres corresponding to about 0.3 ng oligonucleotide/kg cellulose acetate fibres, and the cellulose acetate fibres were dried.

[0036] A plurality of samples of the dried cellulose acetate fibres with a weight of 100 mg each were tested by routine DNA detection methods to provide forensic authentication. The oligonucleotide was detected after PCR amplification in every analysed sample, and the encoded information matched with the originating production batch. >50% of the oligonucleotide amount applied was detected.