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

Introduced: September 1968

Description

B32B covers engineered materials and composite products constructed from two or more layers of different or identical materials bonded together. The classification encompasses laminates, sandwich structures, coated substrates, and multi-ply assemblies using flat, cellular, honeycomb, or other non-flat forms. Applications range from packaging films and adhesive tapes to structural composites, thermal insulation, sound-absorbing panels, and decorative laminates across construction, automotive, aerospace, and consumer goods industries. This subclass focuses on the material composition and layer structure itself rather than the manufacturing processes or end-use applications covered elsewhere.

Additional Content IPC

Glossary

adhesive adhesives substance applied in any state or in any manner, which is incorporated for the purpose of bonding. laminating the combining of a base layer formed from a sheet (e.g., a fabric) or network (e.g., a series of rods connected by cross wires) of material and a mass of plastic, or another physically similar substance, that surrounds or embeds the base layer (i.e., it covers at least the outer surfaces of the opposite elongated sides of the layer) by encasement or penetration of the layer. partial laminating laminating wherein one layer does not fully cover a surface of another layer. layer layers sheet or strip or stratum having a small thickness relative 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 Layered products product composed of layers (continuous, discontinuous, or with gaps) of any form (e.g., honeycomb, corrugated) secured together in any way. Normally of substantially uniform thickness overall (i.e., ignoring local variations such as are produced by a corrugated face layer); may be in the form of an article, e.g., a container. This term is of wider scope than "laminate", covering material with voids between or in any layer. filamentary layer filamentary layers 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 fibrous layers 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. particulate layer particular layers layer that is composed from numerous small separate particles, e.g. chips, finely chopped fibres, powder. film films formed on a layer by spreading a substance thereon; a film is not considered to constitute a layer itself if it serves only as an adhesive or it purpose is merely to finish the surface of a layer.

Limiting references

Etched metallic patterns on the surface of a printed circuit board

CPC subdivides this area 4x more granularly than IPC with 73 additional codes.

73 codes are CPC-only extensions.

Note: 73 CPC extensions are marked as secondary classification only.

12 shared codes have differing titles between IPC and CPC.

Child Classifications

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B32B 1/00 Layered products having a non-planar shape IPC+CPC Available in IPC and CPC
B32B 11/00 Layered products comprising bituminous or tarry substances IPC+CPC Available in IPC and CPC
B32B 13/00 Layered products comprising a water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material IPC+CPC Available in IPC and CPC
B32B 15/00 Layered products comprising metal IPC+CPC Available in IPC and CPC
B32B 17/00 Layered products essentially comprising sheet glass, or glass, slag, or like fibres −1 IPC IPC+CPC Available in IPC and CPC
B32B 18/00 Layered products essentially comprising ceramics, e.g. refractory products since 1985 IPC+CPC Available in IPC and CPC
B32B 19/00 Layered products comprising natural mineral fibres or particles, e.g. asbestos, mica IPC+CPC Available in IPC and CPC
B32B 21/00 Layered products comprising wood, e.g. wood board, veneer, wood particle board IPC+CPC Available in IPC and CPC
B32B 2250/00 Layers arrangement 2nd only +11 CPC CPC only CPC only
B32B 2255/00 Coating on the layer surface 2nd only +10 CPC CPC only CPC only
B32B 2260/00 Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material 2nd only +2 CPC CPC only CPC only
B32B 2262/00 Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives 2nd only +8 CPC CPC only CPC only
B32B 2264/00 Composition or properties of particles which form a particulate layer or are present as additives 2nd only +10 CPC CPC only CPC only
B32B 2266/00 Composition of foam 2nd only +7 CPC CPC only CPC only
B32B 2270/00 Resin or rubber layer containing a blend of at least two different polymers 2nd only CPC only CPC only
B32B 2272/00 Resin or rubber layer comprising scrap, waste or recycling material 2nd only CPC only CPC only
B32B 2274/00 Thermoplastic elastomer material 2nd only CPC only CPC only
B32B 23/00 Layered products comprising cellulosic plastic substances IPC+CPC Available in IPC and CPC
B32B 2305/00 Condition, form or state of the layers or laminate 2nd only +15 CPC CPC only CPC only
B32B 2307/00 Properties of the layers or laminate 2nd only +6 CPC CPC only CPC only

Top Applicants

Top Applicants (IPC)

Class B32,2013–2023, worldwide · Source: EPO PATSTAT

NITTO DENKO CORPORATION JP 4,719
DNP (DAINIPPON PRINTING COMPANY) 3,989
SAINT-GOBAIN GLASS FR 3,695
NITTO DENKO CORPORATION 3,002
DOW GLOBAL TECHNOLOGIES US 2,809
3M INNOVATIVE PROPERTIES COMPANY (MINNESOTA MINING AND MANUFACTURING INNOVATIVE PROPERTIES COMPANY) US 2,679
FUJIFILM JP 2,360
TOPPAN PRINTING COMPANY 2,310
CORNING US 2,168
SEKISUI CHEMICAL COMPANY JP 2,115

Top Applicants (CPC)

Class B32,2013–2023, worldwide · Source: EPO PATSTAT

NITTO DENKO CORPORATION JP 5,666
SAINT-GOBAIN GLASS FR 4,491
3M INNOVATIVE PROPERTIES COMPANY (MINNESOTA MINING AND MANUFACTURING INNOVATIVE PROPERTIES COMPANY) US 3,703
DOW GLOBAL TECHNOLOGIES US 3,403
NITTO DENKO CORPORATION 3,009
FUJIFILM JP 2,629
CORNING US 2,623
LG CHEM KR 2,576
SEKISUI CHEMICAL COMPANY JP 2,482
TORAY INDUSTRIES JP 2,189