IPC 7 English version
 
D21H-D21H01774
  D21H 19/00 - D21H 27/42  

SECTION D – TEXTILES; PAPER


D 21PAPER-MAKING; PRODUCTION OF CELLULOSE


D 21 HPULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C, D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR  [5]


Notes

(1)This subclass covers also pulp compositions for the preparation of fibreboard or other fibrous articles by wet processes.  [5]

(2)In this subclass, the following terms are used with the meaning indicated:

 –"pulp" means a dispersion comprising paper-making fibres and optional additives, which is to be processed, and covers the term "stock"; it also means dry paper-making fibres which are to be made into paper by either wet or dry processes;

 –"paper" means paper, cardboard or wet-laid non-woven fabrics.  [5]

(3)In groups D21H 11/00 to D21H 15/00, in the absence of an indication to the contrary, classification is made in the last appropriate place.  [5]

(4)Processes using enzymes or micro-organisms in order to:

 (i)liberate, separate or purify a pre-existing compound or composition, or to

 (ii)treat textiles or clean solid surfaces of materials

 are further classified in subclass C12S.  [5]


Subclass Index

PULP OR PAPER 

comprising cellulose, lignocellulose or non-cellulose fibres or web-forming material 

D21H 11/00, D21H 13/00 

comprising fibres or web-forming material not characterised by their chemical constitution 

D21H 15/00 

Processes or apparatus for adding material 

D21H 23/00 

NON-FIBROUS MATERIAL ADDED TO THE PULP, PAPER-IMPREGNATING MATERIAL 

D21H 17/00, D21H 21/00 

COATED PAPER; COATING MATERIAL 

D21H 19/00 

OTHER AFTER-TREATMENTS OF PAPER 

D21H 25/00 

SPECIAL PAPER 

D21H 27/00 


11/

00Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only  [5]

11/

02.Chemical or chemomechanical pulp  [5]

11/

04..Kraft or sulfate pulp  [5]

11/

06..Sulfite or bisulfite pulp  [5]

11/

08.Mechanical or thermomechanical pulp  [5]

11/

10.Mixtures of chemical and mechanical pulp  [5]

11/

12.Pulp from non-woody plants or crops, e.g. cotton, flax, straw, bagasse  [5]

11/

14.Secondary fibres (working-up waste paper D21C 5/02)  [5]

11/

16.modified by a particular after-treatment  [5]

11/

18..Highly hydrated, swollen or fibrillatable fibres  [5]

11/

20..Chemically or biochemically modified fibres  [5]

11/

22...cationised  [5]


13/

00Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material (chemical features in the manufacture of artificial fibres D01F) [5]

13/

02.Synthetic cellulose fibres  [5]

13/

04..Cellulose ethers  [5]

13/

06..Cellulose esters  [5]

13/

08..from regenerated cellulose  [5]

13/

10.Organic non-cellulose fibres  [5]

13/

12..from macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds  [5]

13/

14...Polyalkenes, e.g. polystyrene  [5]

13/

16...Polyalkenylalcohols; Polyalkenylethers; Polyalkenylesters  [5]

13/

18...Polymers of unsaturated acids or derivatives thereof, e.g. polyacrylonitriles  [5]

13/

20..from macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds  [5]

13/

22...Condensation polymers of aldehydes or ketones  [5]

13/

24...Polyesters  [5]

13/

26...Polyamides; Polyimides  [5]

13/

28..from natural polymers  [5]

13/

30...Non-cellulose polysaccharides  [5]

13/

32....Alginate fibres  [5]

13/

34...Protein fibres  [5]

13/

36.Inorganic fibres or flakes  [5]

13/

38..siliceous  [5]

13/

40...vitreous, e.g. mineral wool, glass fibres  [5]

13/

42...Asbestos  [5]

13/

44...Flakes, e.g. mica, vermiculite  [5]

13/

46..Non-siliceous fibres, e.g. from metal oxides  [5]

13/

48...Metal or metallised fibres  [5]

13/

50...Carbon fibres  [5]


15/

00Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution  [5]

15/

02.characterised by configuration  [5]

15/

04..crimped, kinked, curled or twisted fibres  [5]

15/

06..Long fibres, i.e. fibres exceeding the upper length limit of conventional paper-making fibres; Filaments  [5]

15/

08..Flakes (D21H 13/44 takes precedence)  [5]

15/

10..Composite fibres  [5]

15/

12...partly organic, partly inorganic  [5]


17/

00Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution  [5]

Notes

(1)In this group, in the absence of an indication to the contrary, a material is classified in the last appropriate place.  [5]

(2)In this group, it is desirable to add the indexing codes relating to individual constituents of fibres used in the pulp or paper. The indexing codes, which are chosen from groups D21H 11/00 to D21H 15/00, have the same numbers as the classification symbols, but a colon is used instead of the oblique stroke, and should be unlinked.  [6]

(3)Attention is drawn to Chapter IV of the Guide which sets forth the rules concerning the application and presentation of the different types of indexing code.  [6]

17/

01.Waste products, e.g. sludge  [5]

17/

02.Material of vegetable origin (proteins D21H 17/22; lignins D21H 17/23; polysaccharides D21H 17/24; rosin D21H 17/62)  [5]

17/

03.Non-macromolecular organic compounds  [5]

17/

04..Hydrocarbons  [5]

17/

05..containing elements other than carbon and hydrogen only  [5]

17/

06...Alcohols; Phenols; Ethers; Aldehydes; Ketones; Acetals; Ketals  [5]

17/

07...Nitrogen-containing compounds  [5]

17/

08....Isocyanates  [5]

17/

09...Sulfur-containing compounds  [5]

17/

10...Phosphorus-containing compounds  [5]

17/

11...Halides  [5]

17/

12...Organo-metallic compounds  [5]

17/

13...Silicon-containing compounds  [5]

17/

14...Carboxylic acids; Derivatives thereof  [5]

17/

15....Polycarboxylic acids, e.g. maleic acid  [5]

17/

16.....Addition products thereof with hydrocarbons  [5]

17/

17...Ketenes, e.g. ketene dimers  [5]

17/

18...forming new compounds in situ, e.g. within the pulp or paper, by chemical reaction with itself, or other added substances  [5]

17/

19....by reactions only involving carbon-to-carbon unsaturated bonds  [5]

17/

20.Macromolecular organic compounds  [5]

17/

21..of natural origin; Derivatives thereof  [5]

17/

22...Proteins  [5]

17/

23...Lignins  [5]

17/

24...Polysaccharides  [5]

17/

25....Cellulose  [5]

17/

26.....Ethers thereof  [5]

17/

27.....Esters thereof  [5]

17/

28....Starch  [5]

17/

29.....cationic  [5]

17/

30....Alginic acid or alginates  [5]

17/

31....Gums  [5]

17/

32.....Guar gum  [5]

17/

33..Synthetic macromolecular compounds  [5]

17/

34...obtained by reactions only involving carbon-to-carbon unsaturated bonds  [5]

17/

35....Polyalkenes, e.g. polystyrene  [5]

17/

36....Polyalkenylalcohols; Polyalkenylethers; Polyalkenylesters  [5]

17/

37....Polymers of unsaturated acids or derivatives thereof, e.g. polyacrylates  [5]

17/

38....containing crosslinkable groups  [5]

17/

39.....forming ether crosslinkages, e.g. alkylol groups  [5]

17/

40.....unsaturated  [5]

17/

41....containing ionic groups  [5]

17/

42.....anionic  [5]

17/

43......Carboxyl groups or derivatives thereof  [5]

17/

44.....cationic  [5]

17/

45......Nitrogen-containing groups  [5]

17/

46...obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds  [5]

17/

47....Condensation polymers of aldehydes or ketones  [5]

17/

48.....with phenols  [5]

17/

49.....with compounds containing hydrogen bound to nitrogen  [5]

17/

50......Acyclic compounds  [5]

17/

51......Triazines, e.g. melamine  [5]

17/

52....Epoxy resins  [5]

17/

53....Polyethers; Polyesters  [5]

17/

54....obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen  [5]

17/

55.....Polyamides; Polyaminoamides; Polyester-amides  [5]

17/

56.....Polyamines; Polyimines; Polyester-imides  [5]

17/

57.....Polyureas; Polyurethanes  [5]

17/

58....obtained by reactions forming in the main chain of the macromolecule a linkage containing sulfur  [5]

17/

59....obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon  [5]

17/

60.Waxes  [5]

17/

61.Bitumen  [5]

17/

62.Rosin; Derivatives thereof  [5]

17/

63.Inorganic compounds  [5]

17/

64..Alkaline compounds  [5]

17/

65..Acid compounds  [5]

17/

66..Salts, e.g. alums  [5]

17/

67..Water-insoluble compounds, e.g. fillers, pigments  [5]

17/

68...siliceous, e.g. clays  [5]

17/

69...modified, e.g. by association with other compositions prior to incorporation in the pulp or paper  [5]

17/

70..forming new compounds in situ, e.g. within the pulp or paper, by chemical reaction with other substances added separately  [5]

17/

71.Mixtures of material (D21H 17/69 takes precedence)  [5]

Notes

(1)In this group, it is desirable to add the indexing codes relating to individual components of the mixtures. The indexing codes, which are chosen from groups D21H 17/00 or D21H 21/00, with the exception of groups D21H 17/18, D21H 17/19 and D21H 17/70, have the same numbers as the classification symbols, but a colon is used instead of the oblique stroke, and should be unlinked.  [5]

(2)Attention is drawn to Chapter IV of the Guide which sets forth the rules concerning the application and presentation of the different types of indexing code.  [6]

17/

72..of organic material  [5]

17/

73..of inorganic material  [5]

17/

74..of organic and inorganic material  [5]

   D21H 19/00 - D21H 27/42