|  | B |
SECTION B — PERFORMING OPERATIONS; TRANSPORTING

SHAPING

|  | B32 |
LAYERED PRODUCTS

|  | B32B |
LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM

|  | B32B |
Note(s) This subclass covers: layered products comprising different kinds of material or layered products not characterised by the particular kind of material used; a product similar to a layered product but comprising only material in the form of a sheet or network embedded in a mass of plastics or of physically-similar substances which mass penetrates the said sheet or network and lies on both sides of the latter (e.g. so that the sheet or network reinforces the plastics substance) provided that the embedded sheet or network extends coherently or connectedly over substantially the whole area of the product; thus the embedded sheet or network may be a fabric or a series of rods connected by cross wires. The manner of making such a product is, however, classified in this subclass only if it is essentially a process of building-up an assembly of layers of which at least one outer layer is preformed. If the embedded material comprises only a series of unconnected rods, the product is not classified in this subclass. This subclass does not cover: processes or apparatus used in, or in connection with, the production or treatment of any product, if the process or apparatus is fully classifiable in a single other class or subclass for processes or apparatus, e.g. Fulltext... Hierarchy... Expanded...B05, Fulltext... Hierarchy... Expanded...B29, Fulltext... Hierarchy... Expanded...B44D, Fulltext... Hierarchy... Expanded...C08J, Fulltext... Hierarchy... Expanded...C09J, Fulltext... Hierarchy... Expanded...C23; compositions or preparation or treatment thereof, unless they are essentially restricted to layered products and cannot be fully classified in another class without ignoring this restriction; etched metallic pattern on the surface of a printed circuit board. [3] In this subclass: a film formed on a layer by spreading a substance thereon is not considered to constitute a layer itself if it serves only as an adhesive or its purpose is merely to finish a surface of a product; groups designating products cover also methods or apparatus specially adapted for producing such products. In this subclass, the following terms or expressions are used with the meanings indicated: "layer" is a sheet or strip or anything else having a small thickness relatively to its other dimensions which, together with at least one other layer, exists in a product, whether it pre-existed, e.g. as a separate sheet or strip, or was formed during the production of the layered product. It may or may not be homogeneous or cohesive; it may be an assembly of fibres or pieces of material. It may be discontinuous, e.g. in the form of a grating, honeycomb, or frame. It may or may not be in complete contact with the next layer, e.g. a corrugated layer against a flat layer; "layered product" comprises at least two layers secured together. The term "secured" includes any method of uniting layers, e.g. needling, stitching, gluing, nailing, dovetailing or the interposition of an adhesive or adhesive impregnated support. It may also be an intermediate stage in the production of an article which is not layered in its final form, e.g. a panel with a protective layer which is stripped off when the panel is placed in its position of use. The layers are preformed layers or layers formed in situ on a preformed layer and may consist of coherent solid materials, including honeycombs and other cellular materials or of non-coherent solid materials composed of assemblies of strands, strips, fibres, tiles or the like; "filamentary layer" means a layer of threads or filaments of any substance (e.g. wires) of more or less unlimited length placed in an orderly arrangement and secured together; it may be woven, knitted, braided, or netted, or formed of threads crossed or laid side and bonded together; "fibrous layer" means a random assembly of fibres or filaments, usually of limited length, e.g. felt, fleece; the fibres may or may not be interengaged or connected, e.g. by adhesive. In this subclass, at each level of indentation, in the absence of an indication to the contrary, classification is made in the first appropriate place. The classification of layered products is provided for in many classes, most of which are confined to a particular kind of material. However, in order that this subclass may provide a basis for making a complete search with respect to layered products, all relevant subject matter is classified in this subclass even though it may also be classified in other classes.

|  | B32B |
Subclass index
LAYERED PRODUCTS CHARACTERISED BY |
Their structure |
general shape | 1/00, 3/00
layer structure | 3/00, 5/00
relation between layers | 7/00
Substances used |
bituminous or tarry substances, water-setting substances | 11/00, 13/00
metal, glass, ceramics, mineral fibres or particles | 15/00, 17/00, 18/00 19/00
wood, paper, cellulosic plastic substances | 21/00, 29/00, 23/00
rubber, synthetic resin | 25/00, 27/00
other substances | 9/00
Their properties | 33/00
MAKING LAYERED PRODUCTS; OTHER OPERATIONS OR DEVICES | 31/00; 35/00

|  | B32B 1/00 |
Layered products essentially having a general shape other than plane

|  | B32B 1/00 |
Note(s) For classification of a product in this group, surface unevennesses or non-uniformities and the shape of individual layers are ignored.

|  | B32B 1/02 |
· | Receptacles, e.g. tanks

|  | B32B 1/04 |
· | characterised by feature of form at particular places, e.g. in edge regions

|  | B32B 1/06 |
· | characterised by fillings or added members in hollow portions

|  | B32B 1/08 |
· | Tubular products

|  | B32B 1/10 |
· | Methods specially adapted for forming such products, e.g. by applying layers successively to a shaped base

|  | B32B 3/00 |
Layered products essentially comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form (continuous layers of fibres or filaments Fulltext... Hierarchy... Expanded...B32B 5/02; foamed layers Fulltext... Hierarchy... Expanded...B32B 5/18); Layered products essentially having particular features of form (Fulltext... Hierarchy... Expanded...B32B 1/00 takes precedence)

|  | B32B 3/00 |
Note(s) In this group, channels, voids, and cavities may be filled otherwise than with air, e.g. with gas, with liquid, with other material different from that of the layer in which they occur.

|  | B32B 3/02 |
· | characterised by features of form at particular places, e.g. in edge regions

|  | B32B 3/04 |
· · | characterised by a layer folded at the edge, e.g. over another layer

|  | B32B 3/06 |
· · | for securing layers together; for attaching the product to another member, e.g. to a support (use or provision of nails, stitches, or similar separate fastening elements for these purposes Fulltext... Hierarchy... Expanded...B32B 7/08)

|  | B32B 3/08 |
· · | characterised by added members at particular parts

|  | B32B 3/10 |
· | characterised by a discontinuous layer, i.e. apertured or formed of separate pieces of material

|  | B32B 3/10 |
Note(s) In this group, a series of spaced separate elements forming in effect a broken surface should be regarded as a layer.

|  | B32B 3/12 |
· · | characterised by a layer of regularly-arranged cells whether integral or formed individually or by conjunction of separate strips, e.g. honeycomb structure

|  | B32B 3/14 |
· · | characterised by a face layer formed of separate pieces of material

|  | B32B 3/16 |
· · · | secured to a flexible backing

|  | B32B 3/18 |
· · | characterised by an internal layer formed of separate pieces of material

|  | B32B 3/20 |
· · · | of hollow pieces, e.g. tubes; of pieces with channels or cavities

|  | B32B 3/22 |
· · · | of spaced pieces

|  | B32B 3/24 |
· · | characterised by an apertured layer, e.g. of expanded metal (layer of netting or fibres Fulltext... Hierarchy... Expanded...B32B 5/02)

|  | B32B 3/26 |
· | characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids (regular cells Fulltext... Hierarchy... Expanded...B32B 3/12)

|  | B32B 3/28 |
· · | characterised by a layer comprising a deformed thin sheet, e.g. corrugated, crumpled (Fulltext... Hierarchy... Expanded...B32B 29/08 takes precedence) [3]

|  | B32B 3/30 |
· · | characterised by a layer formed with recesses or projections, e.g. grooved, ribbed

|  | B32B 5/00 |
Layered products characterised by the non-homogeneity or physical structure of a layer (Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...B32B 9/00-B32B 29/00 take precedence)

|  | B32B 5/00 |
Note(s) In this group, fibres, filaments, granules, or powder forming or included in a layer may be impregnated, bonded together, or embedded in a substance such as synthetic resin. If the substance of the fibres, or the like, or the impregnating, bonding, or embedding substance, is important it is classified in the relevant group for the substance.

|  | B32B 5/02 |
· | characterised by structural features of a layer comprising fibres or filaments (formed of particles, e.g. chips, chopped fibres, powder, Fulltext... Hierarchy... Expanded...B32B 5/16)

|  | B32B 5/02 - B32B 5/12 |
Note(s) Groups Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...B32B 5/02-B32B 5/12 cover, in addition to filamentary and fibrous layers as defined in Note (4) following the title of this subclass, layers of substances having an intrinsic fibrous nature (e.g. paper, wood), if the fibrous nature is important and the particular substance is not important.

|  | B32B 5/04 |
· · | characterised by a layer being specifically extensible by reason of its structure or arrangement

|  | B32B 5/06 |
· · | characterised by a fibrous layer needled to another layer, e.g. of fibres, of paper

|  | B32B 5/08 |
· · | the fibres or filaments of a layer being specially arranged or being of different substances

|  | B32B 5/10 |
· · | characterised by a fibrous layer reinforced with filaments

|  | B32B 5/12 |
· · | characterised by the relative arrangement of fibres or filaments of adjacent layers

|  | B32B 5/14 |
· | characterised by a layer differing constitutionally or physically in different parts, e.g. denser near its faces

|  | B32B 5/16 |
· | characterised by features of a layer formed of particles, e.g. chips, chopped fibres, powder

|  | B32B 5/18 |
· | characterised by features of a layer containing foamed or specifically porous material

|  | B32B 5/20 |
· · | foamed in situ

|  | B32B 5/22 |
· | characterised by the presence of two or more layers which comprise fibres, filaments, granules, or powder, or are foamed or specifically porous

|  | B32B 5/24 |
· · | one layer being a fibrous or filamentary layer

|  | B32B 5/26 |
· · · | another layer also being fibrous or filamentary

|  | B32B 5/28 |
· · · | impregnated with or embedded in a plastic substance

|  | B32B 5/30 |
· · | one layer comprising granules or powder

|  | B32B 5/32 |
· · | both layers being foamed or specifically porous

|  | B32B 7/00 |
Layered products characterised by the relation between layers, i.e. products essentially comprising layers having different physical properties or products characterised by the interconnection of layers (in respect of orientation of features, see the relevant groups for the features concerned, e.g. Fulltext... Hierarchy... Expanded...B32B 5/02 for direction of fibres; in respect of substances Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...B32B 9/00-B32B 29/00)

|  | B32B 7/02 |
· | in respect of physical properties, e.g. hardness

|  | B32B 7/04 |
· | characterised by the connection of layers

|  | B32B 7/06 |
· · | permitting easy separation

|  | B32B 7/08 |
· · | by mechanical connection, e.g. stitching (by interengagement of layers Fulltext... Hierarchy... Expanded...B32B 3/00, e.g. Fulltext... Hierarchy... Expanded...B32B 3/04, Fulltext... Hierarchy... Expanded...B32B 3/06, Fulltext... Hierarchy... Expanded...B32B 3/30; by needling fibrous layers Fulltext... Hierarchy... Expanded...B32B 5/06)

|  | B32B 7/10 |
· · | one or both of the layers having adhesive or inter-reactive properties

|  | B32B 7/12 |
· · | using an adhesive

|  | B32B 7/14 |
· · · | applied in stripes or other spaced arrangement

|  | B32B 9/00 - B32B 29/00 |
Layered products characterised by particular substances used

|  | B32B 9/00 - B32B 29/00 |
Note(s) In groups Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...B32B 9/00-B32B 29/00, the following expressions are used with the meanings indicated: "specific substance" covers specified alternative substances if they are all covered by a single main group; "particulate layer" means a layer of particles, e.g. chips, chopped fibres, powder.

|  | B32B 9/00 |
Layered products essentially comprising a particular substance not covered by groups Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...B32B 11/00-B32B 29/00

|  | B32B 9/02 |
· | comprising animal or vegetable substances

|  | B32B 9/04 |
· | comprising such substance as the main or only constituent of a layer, next to another layer of a specific substance

|  | B32B 9/06 |
· · | of paper or cardboard

|  | B32B 11/00 |
Layered products essentially comprising bituminous or tarry substances

|  | B32B 11/02 |
· | with fibres or particles embedded in it or bonded with it

|  | B32B 11/04 |
· | comprising such substance as the main or only constituent of a layer, next to another layer of a specific substance

|  | B32B 11/06 |
· · | of paper or cardboard

|  | B32B 11/08 |
· · | of metal

|  | B32B 11/10 |
· | next to a fibrous or filamentary layer

|  | B32B 11/12 |
· | next to a particulate layer

|  | B32B 13/00 |
Layered products essentially comprising a water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material

|  | B32B 13/02 |
· | with fibres or particles embedded in it or bonded with it

|  | B32B 13/04 |
· | comprising such substances as the main or only constituent of a layer, next to another layer of a specific substance

|  | B32B 13/06 |
· · | of metal

|  | B32B 13/08 |
· · | of paper or cardboard

|  | B32B 13/10 |
· · | of wood; of wood particle board

|  | B32B 13/12 |
· · | of synthetic resin

|  | B32B 13/14 |
· | next to a fibrous or filamentary layer

|  | B32B 15/00 |
Layered products essentially comprising metal

|  | B32B 15/01 |
· | all layers being exclusively metallic [3]

|  | B32B 15/02 |
· | in a form other than a sheet, e.g. wire, particles

|  | B32B 15/04 |
· | comprising metal as the main or only constituent of a layer, next to another layer of a specific substance

|  | B32B 15/06 |
· · | of rubber

|  | B32B 15/08 |
· · | of synthetic resin

|  | B32B 15/10 |
· · | of wood

|  | B32B 15/12 |
· · | of paper or cardboard

|  | B32B 15/14 |
· | next to a fibrous or filamentary layer

|  | B32B 15/16 |
· | next to a particulate layer

|  | B32B 15/18 |
· | comprising iron or steel

|  | B32B 15/20 |
· | comprising aluminium or copper

|  | B32B 17/00 |
Layered products essentially comprising sheet glass, or fibres of glass, slag or the like

|  | B32B 17/02 |
· | in the form of fibres or filaments

|  | B32B 17/04 |
· · | bonded with or embedded in a plastic substance

|  | B32B 17/06 |
· | comprising glass as the main or only constituent of a layer, next to another layer of a specific substance

|  | B32B 17/08 |
· · | of cellulosic plastic substance

|  | B32B 17/10 |
· · | of synthetic resin

|  | B32B 17/12 |
· | next to a fibrous or filamentary layer

|  | B32B 18/00 |
Layered products essentially comprising ceramics, e.g. refractory products [4]

|  | B32B 19/00 |
Layered products essentially comprising natural mineral fibres or particles, e.g. asbestos, mica

|  | B32B 19/02 |
· | bonded with or embedded in a plastic substance

|  | B32B 19/04 |
· | next to another layer of a specific substance

|  | B32B 19/06 |
· | next to a fibrous or filamentary layer

|  | B32B 19/08 |
· | comprising asbestos

|  | B32B 21/00 |
Layered products essentially comprising wood, e.g. wood board, veneer, wood particle board

|  | B32B 21/02 |
· | in the form of fibres, chips, or particles

|  | B32B 21/04 |
· | comprising wood as the main or only constituent of a layer, next to another layer of a specific substance

|  | B32B 21/06 |
· · | of paper or cardboard

|  | B32B 21/08 |
· · | of synthetic resin; of fibre-reinforced resin

|  | B32B 21/10 |
· | Next to a fibrous or filamentary layer

|  | B32B 21/12 |
· | next to a particulate layer

|  | B32B 21/13 |
· | all layers being exclusively wood [3]

|  | B32B 21/14 |
· | comprising wood board or veneer

|  | B32B 23/00 |
Layered products essentially comprising cellulosic plastic substances

|  | B32B 23/02 |
· | in the form of fibres or filaments

|  | B32B 23/04 |
· | comprising such substance as the main or only constituent of a layer, next to another layer of a specific substance

|  | B32B 23/06 |
· · | of paper or cardboard

|  | B32B 23/08 |
· · | of synthetic resin

|  | B32B 23/10 |
· | next to a fibrous or filamentary layer

|  | B32B 23/12 |
· | next to a particulate layer

|  | B32B 23/14 |
· | characterised by containing special compounding ingredients

|  | B32B 23/16 |
· · | Modifying agents

|  | B32B 23/18 |
· · | Fillers

|  | B32B 23/20 |
· | comprising esters

|  | B32B 23/22 |
· | comprising ethers

|  | B32B 25/00 |
Layered products essentially comprising natural or synthetic rubber

|  | B32B 25/02 |
· | with fibres or particles embedded in it or bonded with it

|  | B32B 25/04 |
· | comprising rubber as the main or only constituent of a layer, next to another layer of a specific substance

|  | B32B 25/06 |
· · | of paper or cardboard

|  | B32B 25/08 |
· · | of synthetic resin

|  | B32B 25/10 |
· | next to a fibrous or filamentary layer

|  | B32B 25/12 |
· | comprising natural rubber

|  | B32B 25/14 |
· | comprising copolymers in which synthetic rubber constituents predominate

|  | B32B 25/16 |
· | comprising polydienes or poly-halodienes

|  | B32B 25/18 |
· | comprising butyl or halobutyl rubber

|  | B32B 25/20 |
· | comprising silicone rubber

|  | B32B 27/00 |
Layered products essentially comprising synthetic resin

|  | B32B 27/02 |
· | in the form of fibres or filaments

|  | B32B 27/04 |
· | as impregnant, bonding, or embedding substance

|  | B32B 27/06 |
· | as the main or only constituent of a layer next to another layer of a specific substance

|  | B32B 27/08 |
· · | of synthetic resin of a different kind

|  | B32B 27/10 |
· · | of paper or cardboard

|  | B32B 27/12 |
· | next to a fibrous or filamentary layer

|  | B32B 27/14 |
· | next to a particulate layer

|  | B32B 27/16 |
· | specially treated, e.g. irradiated

|  | B32B 27/18 |
· | characterised by the use of special additives

|  | B32B 27/20 |
· · | using fillers, pigments, thixotroping agents

|  | B32B 27/22 |
· · | using plasticisers

|  | B32B 27/24 |
· · | using solvents or swelling agents

|  | B32B 27/26 |
· · | using curing agents

|  | B32B 27/28 |
· | comprising copolymers of synthetic resins not wholly covered by any one of the following subgroups

|  | B32B 27/30 |
· | comprising vinyl resin; comprising acrylic resin

|  | B32B 27/32 |
· | comprising polyolefins

|  | B32B 27/34 |
· | comprising polyamides

|  | B32B 27/36 |
· | comprising polyesters

|  | B32B 27/38 |
· | comprising epoxy resin

|  | B32B 27/40 |
· | comprising polyurethanes

|  | B32B 27/42 |
· | comprising melamine, urea, phenol, or similar aldehyde condensation resins

|  | B32B 29/00 |
Layered products essentially comprising paper or cardboard

|  | B32B 29/02 |
· | next to a fibrous or filamentary layer

|  | B32B 29/04 |
· | next to a particulate layer

|  | B32B 29/06 |
· | specially treated, e.g. surfaced, parchmentised

|  | B32B 29/08 |
· | Corrugated paper, corrugated cardboard [3]

|  | B32B 31/00 |
Making layered products (making non-planar products Fulltext... Hierarchy... Expanded...B32B 1/00; making layered products comprising either a layer of plastics or a layer of substances in a plastic state Fulltext... Hierarchy... Expanded...B29; making products characterised by particular features of structure or of composition, see the relevant groups for such products) [4]

|  | B32B 31/00 |
Note(s) Layered products are also classified in this group if not characterised by their structure or composition.

|  | B32B 31/02 |
· | involving assembly of a non-flat intermediate product, e.g. forming a tube and then flattening it

|  | B32B 31/04 |
· | characterised by assembling pre-formed layers

|  | B32B 31/06 |
· · | accompanied by formation of a layer between them

|  | B32B 31/08 |
· · | involving the assembly of two or more webs of indefinite length

|  | B32B 31/10 |
· · | involving the assembly of a web or webs together with a succession of separate panels or pieces of material

|  | B32B 31/12 |
· · | combined with coating or other treatment of a layer before or during assembly

|  | B32B 31/14 |
· | characterised by treatment of assembled layers

|  | B32B 31/16 |
· · | mechanically

|  | B32B 31/18 |
· · · | by cutting or otherwise severing

|  | B32B 31/20 |
· · · | by pressing, with or without heat

|  | B32B 31/22 |
· · · | by surface treatment

|  | B32B 31/24 |
· · | non-mechanically

|  | B32B 31/26 |
· · · | by heat (Fulltext... Hierarchy... Expanded...B32B 31/20 takes precedence)

|  | B32B 31/28 |
· · · | by radiation other than infra-red

|  | B32B 31/30 |
· | characterised by layered material being formed by means of extruding apparatus

|  | B32B 33/00 |
Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings (surface unevennesses or non-uniformities Fulltext... Hierarchy... Expanded...B32B 3/00); Layered products designed for particular purposes not covered by another single class

|  | B32B 35/00 |
Operations or devices concerned specially with layered products and not otherwise provided for, e.g. for repairing