CN211073956U - Light sound insulation composite sheet board core - Google Patents

Abstract

The utility model provides a light composite sheet board core that gives sound insulation, the board core is folded along board core length or width direction by multilayer core strip and is pressed the bonding and form, and the core strip includes solid wood layer core strip and enhancement layer core strip, and solid wood layer core strip has hollow structure, and enhancement layer core strip includes metal material board, alloy material board, solid board, bamboo board, glass board, basalt fiber board, carbon fiber board or polymer material board in one kind or several kinds, and enhancement layer core strip is solid lath. The utility model provides a composite sheet core has the light, syllable-dividing characteristics of quality, and bearing capacity is strong simultaneously, and the difficult distortion and the deformation that take place of board core, board core overall structure intensity is high, the rigidity is strong, can extensively be used for fields such as floor, door plant, furniture, building templates, fitment.

Description

Light sound insulation composite sheet board core

Technical Field

The utility model belongs to the technical field of the composite sheet, in particular to light, sound insulation composite sheet board core.

Background

Because of shortage of wood resources and high price of solid wood, artificial boards are produced at the same time, and are widely used as board materials for furniture, wooden doors, floors, architectural decoration and the like. At present, the wood-based plate of general application is mostly shaving board, fibreboard, plywood and integrated material etc. and above-mentioned wood-based plate is with wood shavings, fibre and veneer etc. as basic unit, forms through applying adhesive through high temperature, high pressure pressing, and finished board density is high, low in production cost, but also has not few defect: the product has heavy weight and is inconvenient to carry; the structure strength of the finished product plate is lower; the static bending deformation resistance is poor; the use amount of the adhesive is large, so that the formaldehyde content of the product is high, and the production requirement of environmental protection is not met.

With the development of various industries, the demand for boards is different, and thus wood composite boards have appeared. The environment-friendly and high-cost-performance wood-plastic composite material is environment-friendly and green, and can replace solid wood in certain application occasions. However, in the building field or the household field, the performance requirements on the composite board are very high, the mechanical properties and the like need to reach certain standards, otherwise, potential safety hazards easily exist, and particularly in the building field, the overall strength of the board is particularly emphasized. The solid wood plate has high overall strength, but is heavy and difficult to transport, load, and unload. Some artificial boards in the market can meet the light weight characteristic, but the overall strength is usually low, the rigidity is also insufficient, and large-size boards often show the sign of softness.

Therefore, it is necessary to develop a light-weight composite board with good mechanical properties.

Disclosure of Invention

Based on the defect that exists among the prior art, the utility model aims at providing a light, bearing capacity are strong, and the difficult distortion and the deformation that take place of board core, the composite sheet board core that board core structural strength is high, the rigidity is strong, and the board core has good syllable-dividing effect simultaneously, can wide application in fields such as floor, door plant, furniture, building templates, fitment.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a light composite sheet board core that gives sound insulation, the board core is folded along board core length or width direction by multilayer core strip and is pressed the bonding and form, and the core strip includes solid wood layer core strip and enhancement layer core strip, and solid wood layer core strip has hollow structure, and enhancement layer core strip includes metal material board, alloy material board, solid board, bamboo board, glass board, basalt fiber board, carbon fiber board or polymer material board in one kind or several kinds, and enhancement layer core strip is solid lath.

Preferably, the solid wood laminated core strip comprises a transverse pressure-bearing body and/or a diagonal structure, the transverse pressure-bearing body comprises a plurality of strips which are parallel to or perpendicular to the surface of the core plate at intervals, and the diagonal structure comprises a plurality of strips which are inclined relative to the surface of the core plate and are arranged at intervals.

Preferably, the reinforcing ply-core strip is located between the transverse pressure bearing body and the diagonal draw structure in the direction of lamination of the multi-ply strip.

Preferably, the cross section of the transverse pressure bearing body is in a comb-shaped or arch-shaped structure, and the cross section of the cable-stayed structure is in a comb-shaped or arch-shaped structure.

Preferably, the projections of the battens at the corresponding positions of the two adjacent layers of cable-stayed structures in the laminating direction of the multilayer core battens are distributed in a herringbone or splayed or crossed manner.

Preferably, the width of the diagonal tension structure and the width of the transverse pressure bearing body in the laminating direction of the multilayer core strip are the same.

Preferably the inclined slats in the diagonal draw structure are at an angle of 45 ° to the core plane.

Preferably, the inclined slats in the diagonal-draw structure are parallel to each other and equally spaced.

Preferably, the slab core includes many groups of core strip units, and every group core strip unit is folded by first enhancement stromatolite core strip, horizontal pressure-bearing body, second enhancement stromatolite core strip, first oblique-pulling structure, second oblique-pulling structure along slab core length or width direction in proper order and is pressed the bonding and constitute, and the core strip unit is folded along slab core length or width direction repetition and is pressed core strip unit constitution slab core.

Preferably, the first reinforcing layer core strip and the second reinforcing layer core strip are made of the same material.

Preferably, the first reinforcing layer core strip and/or the second reinforcing layer core strip are formed by laminating and bonding at least two heterogeneous plates along the length direction or the width direction of the plate core.

Preferably, the slab core includes a plurality of sets of core strip units, each set of core strip unit is formed by laminating, bonding and laminating a transverse pressure-bearing body unit, a diagonal structure unit and a reinforcing layer core strip unit in sequence along the length or width direction of the slab core, the transverse pressure-bearing body unit includes at least one layer of transverse pressure-bearing body, and the core strip unit is formed by repeatedly laminating the core strip units along the length or width direction of the slab core.

Preferably, the slab core comprises a plurality of groups of core strip units, each group of core strip units is formed by sequentially laminating and bonding a diagonal structure unit and a reinforcing layer core strip unit along the length or width direction of the slab core, and the core strip units are repeatedly laminated and pressed along the length or width direction of the slab core to form the slab core.

Preferably, the cable-stayed structural unit comprises at least one layer of cable-stayed structure, and the reinforcing layer core strip unit comprises at least one layer of reinforcing layer core strip.

Preferably, when the stiffener element includes multiple stiffeners, adjacent stiffeners are heterogeneous sheets.

The novel light sound-insulation composite board core comprises a board core formed by cutting the composite board core at any position parallel to the length or width direction of the board core.

The utility model also provides a light composite sheet that gives sound insulation, the composite sheet includes that the upper and lower surface with foretell composite sheet board core is stained with at least one deck wooden cortex or wood veneer.

The utility model also provides a light composite sheet that gives sound insulation, including foretell composite sheet board core, be applied to floor, door plant, furniture, building templates or fitment field.

The utility model provides a composite sheet board core compares the beneficial effect that prior art has and does:

(1) because the board core has special hollow structure and inside component structure, compares traditional composite sheet, the utility model provides a composite sheet board core has the light, syllable-dividing characteristics of quality.

(2) The utility model provides a composite sheet board core uses the solid wood layer as the main, and the timber utilization ratio is higher, and the adhesive use amount is few simultaneously, green.

(3) The utility model provides a composite sheet board core bearing capacity is strong, and the difficult distortion and the deformation that take place of board core, the structural strength of board core is high, the rigidity is strong, can wide application in fields such as floor, door plant, furniture, building templates, fitment.

Drawings

The following drawings are only schematic illustrations and explanations of the present invention, and do not limit the scope of the present invention.

Fig. 1 is a schematic structural diagram of a core strip unit of a composite board core according to an embodiment of the present invention;

fig. 2 is a schematic view of a composite board core strip in an embodiment of the invention;

fig. 3 is a schematic structural diagram of a core strip unit of a composite board core according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a core of a composite board according to an embodiment of the present invention;

fig. 5 is a schematic structural view of a core of a composite board according to an embodiment of the present invention;

fig. 6 is a schematic diagram of a core of a composite board according to an embodiment of the present invention;

fig. 7 is a schematic view of a composite board core strip in an embodiment of the invention;

fig. 8 is a schematic diagram of a core of a composite board according to an embodiment of the present invention;

fig. 9 is a schematic view of a composite board according to an embodiment of the present invention;

fig. 10 is a schematic view of a composite board according to an embodiment of the present invention;

reference numbers in the figures: 1-transverse pressure-bearing body; 2-a first cable-stayed structure; 3-a second cable-stayed structure; 4-a first reinforcing ply core; 5-a second reinforcing layer core strip; 6-core bar unit; 7-transverse pressure-bearing body unit; 8-stayed structural units; 9-reinforcing layer core strip unit; 10-a board core; 11-veneer layer or solid wood veneer; 12-a solid wood board; 13-bamboo board; 14-carbon fiber plate.

Detailed Description

In order to more clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described with reference to the accompanying drawings, in which like reference numerals refer to like parts throughout. For the sake of simplicity, the drawings are only schematic representations of the parts relevant to the invention, and do not represent the actual structure of the product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically illustrated or only labeled.

The technical solution of the present invention will be described in further detail with reference to the accompanying drawings in the embodiments of the present invention.

Example 1

The embodiment provides a light composite sheet board core that gives sound insulation, the board core is folded by multilayer core strip along board core length and is pressed the bonding and constitute, and the core strip includes solid wood layer core strip and enhancement layer core strip, and solid wood layer core strip has hollow structure, and the enhancement layer core strip includes solid board and aluminum plate, and the enhancement layer core strip is solid lath, and solid wood layer core strip includes horizontal pressure-bearing body and draws the structure to one side. The slab core includes many groups of core strip units in this embodiment, and fig. 1 is the overlooking structure schematic diagram of the slab core strip unit in this embodiment, and every group core strip unit is folded by first enhancement layer corestrip 4, horizontal pressure-bearing body 1, second enhancement layer corestrip 5, first oblique-pulling structure 2, second oblique-pulling structure 3 along slab core length direction and is laminated the bonding and constitute. Fig. 2 is a schematic diagram of a core strip of a plate core in an embodiment of the present invention, where fig. 2(a) is a side view of a first reinforcing layer core strip 4 in fig. 1, fig. 2(B) is a side view of a transverse pressure-bearing body 1 in fig. 1 in a direction of B, fig. 2(c) is a side view of a second reinforcing layer core strip 5 in fig. 1 in a direction of a, fig. 2(d) is a side view of a first cable-stayed structure 2 in fig. 1 in a direction of a, and fig. 2(e) is a side view of a second cable-stayed structure 3 in fig. 1 in a direction of B. The transverse pressure-bearing body comprises a plurality of battens which are arranged at intervals vertical to the plate core plate surface, the inclined pulling structure comprises a plurality of battens which are inclined relative to the plate core plate surface and are arranged at intervals, the cross section of the transverse pressure-bearing body and the inclined pulling structure is of a comb-shaped structure, and the inclination directions of the battens of the first inclined pulling structure and the second inclined pulling structure relative to the plate core plate surface are opposite. First enhancement layer core strip is solid wood board, and second enhancement layer core strip is aluminum plate, and first enhancement layer core strip and second enhancement layer core strip have certain thickness along slab core length direction, and thicker lath helps increasing the bulk strength of slab core, nevertheless can increase the dead weight of slab core simultaneously, and specific thickness adjusts according to the practical application occasion. The core strip units are repeatedly overlapped along the length direction of the plate core to form the plate core.

Example 2

The embodiment provides a light composite sheet board core that gives sound insulation, the board core is folded along board core length by multilayer core strip and is pressed the bonding and form, and the core strip includes solid wood layer core strip and enhancement layer core strip, and solid wood layer core strip has hollow structure, and the enhancement layer core strip includes solid wood board, aluminum plate, bamboo board and carbon fiber board, and the enhancement layer core strip is solid lath, and solid wood layer core strip includes horizontal pressure-bearing body and draws the structure to one side. This embodiment board core includes many groups core strip units, and fig. 3 is the embodiment of the utility model provides a structural schematic of core strip unit of composite sheet slab core, every group core strip unit is folded by first enhancement layer core strip 4, horizontal pressure-bearing body 1, second enhancement layer core strip 5, first oblique-pulling structure 2, second oblique-pulling structure 3 and is pressed the bonding and constitute along slab core length direction in proper order. The transverse pressure-bearing body comprises a plurality of battens which are arranged at intervals vertical to the plate core plate surface, the inclined pulling structure comprises a plurality of battens which are inclined relative to the plate core plate surface and are arranged at intervals, the cross section of the transverse pressure-bearing body and the inclined pulling structure is of a comb-shaped structure, and the inclination directions of the battens of the first inclined pulling structure and the second inclined pulling structure relative to the plate core plate surface are opposite. The first reinforcing layer core strip and the second reinforcing layer core strip can be formed by single-layer plates or multiple layers of solid plates which are laminated and bonded according to the application occasions of the plate core. As shown in fig. 3(a), the first reinforcing core is composed of a single-layer aluminum plate, and the second reinforcing core 5 is composed of three kinds of heterogeneous plates, i.e., a solid wood plate 12, a bamboo plate 13, and a carbon fiber plate 14, laminated and bonded. As shown in fig. 3(b), the first reinforcing core is composed of three kinds of heterogeneous sheets laminated and bonded, and the second reinforcing core is composed of a single sheet. The core strip units are repeatedly overlapped along the length direction of the plate core to form the plate core.

Example 3

The embodiment provides a light composite sheet board core that gives sound insulation, the board core is folded by multilayer core strip along board core length and is pressed the bonding and form, the core strip includes solid wood layer core strip and enhancement layer core strip, solid wood layer core strip has hollow structure, enhancement layer core strip includes metal material board, alloy material board, solid board, bamboo board, glass board, basalt fiber board, in carbon fiber board or the macromolecular material board one or several kinds, the enhancement layer core strip is solid lath, solid wood layer core strip includes horizontal pressure-bearing body and draws the structure to one side. Fig. 4 is the embodiment of the utility model provides an in the composite sheet slab core structure sketch map, the slab core includes seven groups of core strip units, and every group core strip unit 6 is folded by first enhancement layer core strip 4, horizontal pressure-bearing body 1, second enhancement layer core strip 5, first oblique-pulling structure 2, second oblique-pulling structure 3 along slab core length direction in proper order and is pressed the bonding and constitute, and the core strip unit is folded along slab core length repetition and is pressed core strip unit constitution slab core. The transverse pressure-bearing body comprises a plurality of battens which are arranged at intervals vertical to the plate core plate surface, the inclined pulling structure comprises a plurality of battens which are inclined relative to the plate core plate surface and are arranged at intervals, the cross section of the transverse pressure-bearing body and the inclined pulling structure is of a comb-shaped structure, and the inclination directions of the battens of the first inclined pulling structure and the second inclined pulling structure relative to the plate core plate surface are opposite. According to the application of the plate core, the first reinforcing layer core strip and the second reinforcing layer core strip are made of single-layer plates, and the first reinforcing layer core strip and the second reinforcing layer core strip in each group of core strip units can be solid plates made of the same material, such as solid wood plates. Fig. 5 is the embodiment of the utility model provides an embodiment of a composite sheet slab core structural schematic diagram, the slab core includes four sets of core strip units, every group core strip unit 6 is folded by first enhancement layer core strip 4, horizontal pressure-bearing body 1, second enhancement layer core strip 5, first oblique-pulling structure 2, second oblique-pulling structure 3 along slab core length in proper order and is pressed the bonding and constitute, the core strip unit is folded along slab core length is repeated and is pressed the core strip unit and constitute the slab core, first enhancement layer core strip and second enhancement layer core strip in each group core strip unit can be folded by the solid panel of multilayer and press the bonding and form.

Example 4

The embodiment provides a light composite sheet board core that gives sound insulation, the board core is folded by multilayer core strip along board core length and is pressed the bonding and form, and the core strip includes solid wood layer core strip and enhancement layer core strip, and solid wood layer core strip has hollow structure, and enhancement layer core strip includes metal material board, alloy material board, solid board, bamboo board, glass board, basalt fiber board, carbon fiber board or polymer material board in one or several kinds, and the enhancement layer core strip is solid lath. The solid wood core strip comprises a transverse pressure-bearing body and a diagonal pulling structure. The slab core includes many groups of core strip units, every group core strip unit is folded along slab core length direction by horizontal pressure-bearing body unit 7 in proper order, draw constitutional unit 8 and enhancement layer core strip unit 9 to one side and fold and press the bonding and form, horizontal pressure-bearing body unit 7 includes the horizontal pressure-bearing body of at least one deck, draw constitutional unit 8 to one side and include that at least one deck draws the structure to one side, enhancement layer core strip unit 9 includes the enhancement layer core strip of at least one deck, the core strip unit is along the repeated lamination core strip unit constitution slab core of slab core length direction. Fig. 6 is a composite sheet slab core sketch map in the embodiment of the utility model, the slab core includes many groups of core strip units, every group core strip unit is folded by horizontal pressure-bearing body unit 7, draw constitutional unit 8 and enhancement layer core strip unit 9 to one side along slab core length direction in proper order and is pressed the bonding and constitute, horizontal pressure-bearing body unit 7 includes the horizontal pressure-bearing body of one deck, draw constitutional unit 8 to one side and include two-layer structure to one side, enhancement layer core strip unit 9 includes the one deck enhancement layer core strip, the core strip unit is folded along slab core length direction is repeated and is pressed the core strip unit and constitute the slab core. Fig. 6(B) is a side view of the core shown in the present embodiment taken along direction a in fig. 6(a), fig. 7(a) and 7(B) are side views of adjacent two layers of the cable-stayed structure in fig. 6(a), and fig. 7(c) is a side view of the lateral pressure-receiving body in fig. 6(a) taken along direction B. The transverse pressure-bearing body comprises a plurality of battens which are arranged at intervals vertical to the plate core plate surface, the cable-stayed structure comprises a plurality of battens which are inclined relative to the plate core plate surface and are arranged at intervals, and the cross section of the transverse pressure-bearing body and the cable-stayed structure is of an arch structure.

Example 5

The embodiment provides a light composite sheet board core that gives sound insulation, the board core is folded by multilayer core strip along board core length and is pressed the bonding and form, and the core strip includes solid wood layer core strip and enhancement layer core strip, and solid wood layer core strip has hollow structure, and enhancement layer core strip includes metal material board, alloy material board, solid board, bamboo board, glass board, basalt fiber board, carbon fiber board or polymer material board in one or several kinds, and the enhancement layer core strip is solid lath. The solid wood layer core strip comprises a diagonal draw structure. The slab core includes many groups of core strip units, and every group core strip unit is folded by drawing constitutional unit and enhancement layer core strip unit to one side along slab core length direction in proper order and is pressed the bonding and form, and the core strip unit is folded along slab core length direction is repeated and is pressed the core strip unit and constitute the slab core, draws constitutional unit to one side and includes that at least one deck draws the structure to one side, and enhancement layer core strip unit includes at least one deck enhancement layer core strip. As shown in fig. 8(a), the diagonal tension structural unit may be composed of a layer of diagonal tension structure, and the reinforcing layer core bar unit may be composed of a layer of reinforcing layer core bar. As shown in fig. 8(b), the diagonal tension structural unit may also be composed of three layers of diagonal tension structures. The cross section of the cable-stayed structure is of an arch structure, and the cable-stayed structure comprises a plurality of laths which are inclined relative to the surface of the plate core and are arranged at intervals.

In particular embodiments, when the stiffener bar unit includes multiple stiffener bars, adjacent stiffener bars may be heterogeneous sheets.

In a specific embodiment, the composite board core may be cut at any position parallel to the length or width direction of the core to form a new core.

In a specific embodiment, at least one veneer layer of wood skin or solid wood may be adhered to the upper and lower surfaces of the core to form a composite board, as shown in fig. 9 and 10.

In a specific embodiment, due to the difference of the spacing, the inclination direction and the inclination angle of the slats in the cable-stayed structures, the projections of the slats at the corresponding positions in the two adjacent layers of cable-stayed structures in the laminating direction can be distributed in a herringbone or splayed or crossed manner.

In order to achieve better stress effect, in a specific embodiment, the width of the cable-stayed structure and the width of the transverse pressure-bearing body in the laminating direction of the multilayer core strips are the same.

In a specific embodiment, the distance between the battens of the diagonal structure can be adjusted according to the processing technology and the actual application occasion of the plate, the battens in the same layer of diagonal structure can be parallel to each other, and the distance between the adjacent battens can be equal or unequal; the inclined directions and angles of the battens in the same layer of inclined pulling structure relative to the surface of the core plate can be the same or different. Preferably the angle of inclination of the slats in the same tier of diagonal draw structure relative to the plane of the core plate is the same, preferably 45 °. Preferably, the batten spacing of the transverse pressure-bearing body is smaller than that of the cable-stayed structure, so that the bonding area is increased, and the stability of the plate core is improved.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (18)

1. The light sound-insulation composite board core is characterized in that the board core is formed by laminating and bonding a plurality of layers of core strips along the length direction or the width direction of the board core, each core strip comprises a solid wood layer core strip and a reinforcing layer core strip, each solid wood layer core strip is of a hollow structure, each reinforcing layer core strip comprises one or more of a metal material plate, an alloy material plate, a solid wood plate, a bamboo plate, a glass plate, a basalt fiber plate, a carbon fiber plate or a polymer material plate, and each reinforcing layer core strip is a solid plate strip.

2. A composite board core according to claim 1, wherein the solid wood laminated core strip includes a lateral bearing body including a plurality of spaced apart strips parallel or perpendicular to the surface of the board core and/or a diagonal draw structure including a plurality of spaced apart strips inclined with respect to the surface of the board core.

3. A composite panel core according to claim 2, wherein the reinforcing core strips are located between the transverse bearing bodies and the diagonal draw structure in the direction of lamination of the plurality of core strips.

4. A composite board core according to claim 2, wherein the cross-section of the transverse pressure-bearing body is comb-shaped or bow-shaped, and the cross-section of the cable-stayed structure is comb-shaped or bow-shaped.

5. A composite board core according to claim 2, wherein the projections of the slats in the corresponding positions of two adjacent layers of the cable-stayed structures in the laminating direction of the multilayer core slats are distributed in a herringbone or splayed or crossed manner.

6. A composite panel core according to claim 2, wherein the diagonal draw structure and the transverse pressure bearing body have the same width in the direction of lamination of the plurality of layers of core strips.

7. A composite panel core according to claim 2, wherein the inclined slats of the diagonal draw structure are at an angle of 45 ° to the panel core plane.

8. A composite panel core according to claim 2, wherein the inclined slats in the diagonal draw structure are parallel to each other and equally spaced.

9. A composite board core according to claim 4, wherein the core includes a plurality of sets of core strip units, each set of core strip units is formed by laminating and bonding a first reinforced core strip, a transverse pressure-bearing body, a second reinforced core strip, a first cable-stayed structure and a second cable-stayed structure in sequence along the length or width direction of the core, and the core strip units are formed by repeatedly laminating the core strip units along the length or width direction of the core.

10. A composite board core according to claim 9, wherein the first and second stiffener strips are of the same material.

11. A composite panel core according to claim 9, wherein the first and/or second stiffener strips are formed by laminating and bonding at least two dissimilar sheets in the length or width direction of the panel core.

12. A composite board core according to claim 4, wherein the board core comprises a plurality of sets of core strip units, each set of core strip units is formed by laminating and bonding a transverse pressure-bearing body unit, a diagonal structure unit and a reinforcing layer core strip unit in sequence along the length or width direction of the board core, the transverse pressure-bearing body unit comprises at least one layer of transverse pressure-bearing body, and the core strip units are formed by laminating and pressing the core strip units along the length or width direction of the board core.

13. A composite board core according to claim 4, wherein the board core comprises a plurality of sets of core strip units, each set of core strip units is formed by sequentially laminating and bonding a cable-stayed structural unit and a reinforcing layer core strip unit along the length or width direction of the board core, and the core strip units are repeatedly laminated and bonded along the length or width direction of the board core to form the board core.

14. A composite panel core according to claim 12 or 13, wherein the diagonal-draw structural elements comprise at least one layer of diagonal-draw structure and the stiffener-ply core-strip elements comprise at least one layer of stiffener-ply core-strips.

15. A composite panel core according to claim 14, wherein when the stiffener elements comprise multiple layers of stiffener wicks, adjacent stiffener wicks are heterogeneous sheets.

16. A lightweight acoustical composite panel core, comprising a core formed by cutting the composite panel core of any one of claims 1 to 15 at any position parallel to the length or width of the core.

17. A lightweight acoustic composite panel characterized by at least one of a wood skin or a solid wood veneer adhered to the upper and lower surfaces of the core of the composite panel as claimed in any one of claims 1 to 15.

18. A lightweight acoustical composite panel comprising the composite panel core of any one of claims 1 to 15 for use in flooring, door panels, furniture, building formwork or finishing applications.

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