# US 2011/0291441 A1 · Cross laminated strand product

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- Number: US 2011/0291441 A1
- Document ID: US20110291441A1
- Status: Published application
- Kind: A1
- Application number: 13/116,383
- Filed: 2011-05-26
- Published: 2011-12-01
- Earliest claimed: 2010-05-31
- Assignees: Lignor Limited
- Inventors: Peter Edward BURTON
- Web page: https://patentgrep.com/patent/US20110291441A1

## CPC

- B32B 38/1808: {characterised by the laying up of the layers}
- B27N 3/00: Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N 3/04: from fibres
- B32B 3/18: characterised by an internal layer formed of separate pieces of material {which are juxtaposed side-by-side (B32B5/02 takes precedence)}
- B32B 5/12: characterised by the relative arrangement of fibres or filaments of {different layers, e.g. the fibres or filaments being parallel or perpendicular to each other}
- B32B 7/03: with respect to the orientation of features (direction of fibres or filaments B32B5/12)
- B32B 7/04: Interconnection of layers
- B32B 7/12: using interposed adhesives or interposed materials with bonding properties
- B32B 21/042: {of wood (B32B21/13 takes precedence)}
- B32B 21/13: all layers being exclusively wood
- B62D 25/2054: {Load carrying floors for commercial vehicles}
- B62D 29/02: predominantly of wood
- B32B 37/12: characterised by using adhesives
- B32B 2307/732: Dimensional properties
- B32B 2307/764: Insect repellent
- B32B 2317/16: Wood, e.g. woodboard, fibreboard, woodchips
- B32B 2419/04: Tiles for floors or walls
- B32B 2471/00: Floor coverings (B32B2419/04 takes precedence)
- Y10T 428/24058: including grain, strips, or filamentary elements in respective layers or components in angular relation
- Y10T 428/24066: Wood grain
- Y10T 428/24074: Strand or strand-portions
- Y10T 428/24091: with additional layer[s]
- Y10T 428/24132: including grain, strips, or filamentary elements in different layers or components parallel
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B27N: MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL (containing cementitious material B28B; shaping of substances in a plastic state B29C; fibreboards made from fibrous suspensions D21J; drying F26B17/00)
- B62D: MOTOR VEHICLES; TRAILERS (steering, or guiding on a desired track, of agricultural machines or implements A01B69/00; wheels, castors, axles, increasing wheel adhesion B60B; vehicle tyres, tyre inflation or tyre changing B60C; connections between vehicles of a train or the like B60D; vehicles for use on rail and road, amphibious or convertible vehicles B60F; suspension arrangements B60G; heating, cooling, ventilating or other air treating devices B60H; windows, windscreens, non-fixed roofs, doors or similar devices, protective coverings for vehicles not in use B60J; propulsion plant arrangements, auxiliary drives, transmissions, controls, instrumentation or dashboards B60K; electric equipment or propulsion of electrically-propelled vehicles B60L; power supply for electrically-propelled vehicles B60M; passenger accommodation not otherwise provided for B60N; adaptations for load transportation or to carry special loads or objects B60P; arrangement of signalling or lighting devices, the mounting or supporting thereof or circuits therefor, for vehicles in general B60Q; vehicles, vehicle fittings or vehicle parts not otherwise provided for B60R; servicing, cleaning, repairing, supporting, lifting, or manoeuvring, not otherwise provided for, B60S; brake arrangements, brake control systems or parts thereof B60T; air-cushion vehicles B60V; motor-cycles, accessories therefor B62J, B62K; testing of vehicles G01M)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A cross laminated strand product formed from a laminate of a plurality of layers, wherein each layer includes substantially aligned strands of wood bonded together with a binder including an isocyanate resin, and wherein the respective strands of adjacent layers are oriented substantially perpendicularly to one another.

## Claims

### Claim 1

1) A cross laminated strand product formed from a laminate of a plurality of layers, wherein each layer includes substantially aligned strands of wood bonded together with a binder including an isocyanate resin, and wherein the respective strands of adjacent layers are oriented substantially perpendicularly to one another.

### Claim 2 (depends on 1)

2) A product according to claim 1, wherein each layer is pre-formed.

### Claim 3 (depends on 1)

3) A product according to claim 1, wherein each layer includes one or more pre-formed boards including substantially aligned strands of wood.

### Claim 4 (depends on 1)

4) A product according to claim 1, wherein each layer has substantially equal thickness.

### Claim 5 (depends on 1)

5) A product according to claim 1, wherein each layer has a thickness of between 5 mm and 50 mm.

### Claim 6 (depends on 1)

6) A product according to claim 1, wherein the strands are formed from hardwood.

### Claim 7 (depends on 6)

7) A product according to claim 6, wherein the strands are formed from wood of one or more eucalypts.

### Claim 8 (depends on 7)

8) A product according to claim 7, wherein the eucalypts are selected from the species selected from the group consisting of:
a) Tasmanian Bluegum (E. Globulus);
b) Karri (E. Diversicolor);
c) Sydney Bluegum (E. Saligna);
d) Marri (E. Calophylla);
e) Jarrah (E. Marginata); and,
f) Shining Gum (E. Nitens).
g) Flooded Gum (E. Grandis)

### Claim 9 (depends on 7)

9) A product according to claim 7, wherein the strands are formed from plantation trees having an age of 12 years or less.

### Claim 10 (depends on 7)

10) A product according to claim 7, wherein the strands are formed from forest thinnings having an age of 30 years or less.

### Claim 11 (depends on 1)

11) A product according to claim 1, wherein the strands are formed from softwood.

### Claim 12 (depends on 11)

12) A product according to claim 11, wherein the strands are formed from wood of pines.

### Claim 13 (depends on 1)

13) A product according to claim 1, wherein the binder includes a polymeric methane di-isocyanate resin.

### Claim 14 (depends on 1)

14) A product according to claim 1, wherein the binder includes a wax.

### Claim 15 (depends on 1)

15) A product according to claim 1, wherein the strands have an average length of between 145 mm and 300 mm.

### Claim 16 (depends on 1)

16) A product according to claim 1, wherein the strands have an average width of between 10 mm and 25 mm.

### Claim 17 (depends on 1)

17) A product according to claim 1, wherein the strands have an average thickness of between 0.5 mm and 1.5 mm.

### Claim 18 (depends on 1)

18) A product according to claim 1, wherein at least 85% of the strands of each layer are aligned.

### Claim 19 (depends on 1)

19) A product according to claim 1, wherein at least 95% of the strands of each layer are aligned.

### Claim 20 (depends on 1)

20) A product according to claim 1, wherein the product has a density of between 600 kg/m3 and 850 kg/m3.

### Claim 21 (depends on 1)

21) A product according to claim 1, wherein the product includes an odd number of layers, so that outside layers of the product are substantially aligned in the same direction.

### Claim 22 (depends on 21)

22) A product according to claim 21, wherein the outside layers are substantially aligned in a length direction of the product.

### Claim 23 (depends on 1)

23) A product according to claim 1, wherein surfaces of each layer are substantially flat.

### Claim 24 (depends on 23)

24) A product according to claim 23, wherein the surfaces of each layer are sanded flat.

### Claim 25 (depends on 1)

25) A product according to claim 1, wherein at least one surface of each layer is glued to a surface of an adjacent layer to form the laminate.

### Claim 26 (depends on 1)

26) A product according to claim 1, wherein the layers are glued together using a Poly Urethane Reactive (PUR) glue.

### Claim 27 (depends on 1)

27) A product according to claim 1, used as industrial flooring in at least one of the following:
a) trucks; and,
b) containers.

### Claim 28

28) Industrial flooring including a cross laminated strand product formed from a laminate of a plurality of layers, wherein each layer includes substantially aligned strands of wood bonded together with a binder including an isocyanate resin, and wherein the respective strands of adjacent layers are oriented substantially perpendicularly to one another.

### Claim 29 (depends on 28)

29) Industrial flooring according to claim 28, wherein the strands have been treated for insects.

### Claim 30

30) A method of manufacturing a wood strand product, the method including:
a) forming a plurality of layers, each layer including substantially aligned strands of wood bonded together with a binder including an isocyanate resin;
b) forming a laminate of the plurality of layers, wherein the respective strands of adjacent layers are oriented substantially perpendicularly to one another.

### Claim 31 (depends on 30)

31) A method according to claim 30, wherein the method includes pre-forming the layers.

### Claim 32 (depends on 30)

32) A method according to claim 30, wherein the method includes forming the layers from one or more pre-formed boards including substantially aligned strands of wood.

### Claim 33 (depends on 32)

33) A method according to claim 32, wherein the method includes forming the boards using a continuous strand board forming technique.

### Claim 34 (depends on 30)

34) A method according to claim 30, wherein the method includes forming the strands from hardwood.

### Claim 35 (depends on 34)

35) A method according to claim 34, wherein the method includes forming the strands from logs of eucalypts.

### Claim 36 (depends on 35)

36) A method according to claim 35, wherein the logs are harvested from plantation trees having an age of 12 years or less.

### Claim 37 (depends on 36)

37) A method according to claim 36, wherein the logs are harvested from forest thinnings having an age of 30 years or less.

### Claim 38 (depends on 30)

38) A method according to claim 30, wherein the method includes forming the strands from softwood.

### Claim 39 (depends on 38)

39) A method according to claim 38, wherein the method includes forming the strands from logs of pines.

### Claim 40 (depends on 30)

40) A method according to claim 30, wherein the method includes treating the strands for insects.

### Claim 41 (depends on 30)

41) A method according to claim 30, wherein the method includes sanding the surfaces of each layer.

### Claim 42 (depends on 30)

42) A method according to claim 30, wherein the method includes gluing one surface of each layer to a surface of an adjacent layer to form the laminate.

### Claim 43 (depends on 42)

43) A method according to claim 42, wherein the method includes gluing the layers together using a Poly Urethane Reactive (PUR) glue.

### Claim 44 (depends on 1)

44) A product according to claim 1, wherein the product includes five layers.

### Claim 45 (depends on 30)

45) A method according to claim 30, wherein the product is formed from five layers.