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.

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