Method for recycling a transfer product

Patent metadata

Field	Value
Publication number	US-2022040887-A1
Application number	US-202117432393-A
Country	US
Kind code	A1
Filing date	Jan 20, 2021
Priority date	Jan 30, 2020
Publication date	Feb 10, 2022
Grant date	—

Abstract

A method for recycling a transfer product having at least one carrier film, wherein a transfer ply is arranged detachably at least partially on the at least one carrier film, and wherein the following steps are carried out in the method, in particular in the following order:
a) shredding ( 10 ) the transfer product, by means of a shredder or a shredding device, into transfer product shreds, in particular carrier film shreds, preferably wherein the transfer product is present wound onto a roll, b) compressing ( 30 ) the transfer product shreds, in particular carrier film shreds, into a compact product or extruding ( 31 ) the transfer product shreds, in particular carrier film shreds, into an extrusion product.

First claim

1 . A method for recycling a transfer product having at least one carrier film, wherein a transfer ply is arranged detachably at least partially on the at least one carrier film, and wherein the following steps are carried out in the method:
a) shredding the transfer product, by means of a shredder or a shredding device, into transfer product shreds, b) compressing the transfer product shreds, into a compact product or extruding the transfer product shreds, into an extrusion product.

2 . The method according to claim 1 , wherein
the transfer product shreds comprise transfer ply constituents and/or carrier film shreds.

3 . The method according to claim 2 , wherein the transfer ply constituents comprise varnish residues and/or varnish dusts and/or fine material.

4 . (canceled)

5 . The method according to claim 1 , wherein
the at least one carrier film comprises PET as main constituent, wherein the proportion of PET in the carrier film is more than 97%.

6 . The method according to claim 1 , wherein
the at least one transfer ply, has at least one layer or a combination of layers, selected from: adhesive layer, detachment layer, decorative layer, metal layer, adhesion-promoting layer, primer layer, color layer.

7 . (canceled)

8 . (canceled)

9 . (canceled)

10 . The method according to claim 1 , wherein
the following step is further performed before step a): winding the transfer product, with the result that a roll is provided.

11 . The method according to claim 1 , wherein
the following step is further performed before step a): collecting the transfer product by means of a collection vessel.

12 . The method according to claim 1 , wherein
the following step is further performed before step a): transporting the roll and/or the collection vessel to the shredder or the shredding device by hand and/or by means of a feeder.

13 . The method according to claim 1 , wherein,
before step a), the transfer product has a foreign material proportion in the range of from 0 wt.-% to 5 wt. %.

14 . The method according to claim 1 , wherein,
before step a), the transfer product has a proportion of adhesive strips and/or splicing tapes in the range of from 0 wt.-% to 0.5 wt. %.

15 . (canceled)

16 . The method according to claim 1 , wherein
the shredder and/or the shredding device cuts and/or chops and/or shreds and/or tears the transfer product in step a).

17 . The method according to claim 1 , wherein,
in step a), during the shredding of the transfer product, the at least one transfer ply is at least partially removed from the at least one carrier film, and thus a mixture of transfer product shreds and/or carrier film shreds and/or transfer ply constituents results.

18 . (canceled)

19 . (canceled)

20 . (canceled)

21 . The method according to claim 1 , wherein
the following step is further performed after step a), c) mechanically cleaning the transfer product shreds, by machine, in order to remove foreign materials and/or transfer ply constituents.

22 . (canceled)

23 . The method according to claim 21 , wherein
the mechanical cleaning by machine in step c) is effected by means of friction, wherein the transfer product shreds are present in the dry state and further transfer ply constituents are removed.

24 . The method according to claim 21 , wherein
the transfer product shreds after step c) have a varnish residue proportion in the range of from 0 wt.-% to 100 wt. %.

25 . (canceled)

26 . The method according to claim 1 , wherein,
in step b), the compressing is effected by means of agglomerating.

27 . The method according to claim 1 , wherein,
during the compressing in step b), the transfer product shreds, are compacted and/or compressed, in order to provide a compact product with a higher bulk density, than the bulk density of the transfer product shreds.

28 . (canceled)

29 . The method according to claim 1 , wherein,
during the extruding in step b), the transfer product shreds, are plasticized and homogenized by means of an extruder system.

30 . The method according to claim 1 , wherein
the following step is further performed after the compressing or extruding in step b): Liquid State Polymerization and/or Solid State Polymerization to improve the material properties.

31 . The method according to claim 1 , wherein
the melting temperature of the transfer product shreds, in step b) during the extruding is in a range of from 100° C. to 350° C.

32 . (canceled)

33 . (canceled)

34 . (canceled)

35 . The method according to claim 1 , wherein,
after step b), the compact product and/or extrusion product has a purity in the range of from 60.0 wt.-% to 100.0 wt. %.

36 . The method according to claim 1 , wherein,
after step b), the compact product and/or extrusion product has an intrinsic viscosity in the range of from 0.3 dl/g to 0.9 dl/g.

37 . The method according to claim 1 , wherein,
after step b), the compact product and/or extrusion product is colorless, transparent, crystal clear, opaque, dyed, at least partially dyed or colored.

38 . (canceled)

39 . The method according to claim 1 , wherein,
after step b), the compact product and/or extrusion product is suitable for at least one subsequent process or a combination of processes, selected from: injection molding, extrusion, pressing processes, compounding, chemical recycling and/or energy recovery.

40 . The method according to claim 1 , wherein
the following step is further performed after step c): d) cleaning the transfer product shreds with washing liquid by means of at least one cleaning device or a combination of cleaning devices, selected from: washer, hot washer, friction washer, wet cutting device, and/or wet cutting mill with the result that the at least one transfer ply is at least partially removed from the carrier film and further transfer ply constituents result.

41 . (canceled)

42 . The method according to claim 40 , wherein,
in step d), the at least one transfer ply is removed from the carrier film by means of friction.

43 . The method according to claim 40 , wherein,
in step d), the further transfer ply constituents are removed from the washing liquid by means of at least one thermal and/or mechanical separating process.

44 . (canceled)

45 . (canceled)

46 . (canceled)

47 . The method according to claim 40 , wherein
the following step is further performed after step d): e) drying the transfer product shreds, by means of a mechanical dryer and/or thermal dryer.

48 . (canceled)

49 . (canceled)

50 . (canceled)

51 . The method according to claim 47 , wherein,
after step e), the transfer product shreds have a purity in the range of from 60.0 wt.-% to 100.0 wt. %.

52 . (canceled)

53 . The method according to claim 1 , wherein
the following step is further performed after st

Assignees

• Leonhard Kurz Stiftung & Co Kg

Inventors

• Von Beyer Markus
• Rauh Astrid
• Stengel Siegfried
• Hahn Martin

Classifications

• B29K2075/00

  Use of {PU, i.e.} polyureas or polyurethanes {or derivatives thereof}, as moulding material · CPC title

• B29B17/00

  Recovery of plastics or other constituents of waste material containing plastics; ({volume reduction of waste plastics, e.g. by mechanical compacting or melting disposal of solid waste B09B;} chemical recovery C08J11/00) · CPC title

• B29K2023/12

  PP, i.e. polypropylene · CPC title

• B29K2055/02

  ABS polymers, i.e. acrylonitrile-butadiene-styrene polymers · CPC title

• B29B17/04 Primary

  Disintegrating plastics, {e.g. by milling}(B29B9/02, B29B11/02, B29B13/10, {B29B17/02} take precedence) · CPC title