Impregnated paper veneer OSB (oriented strand board) composite floor and production process thereof

Abstract

The invention belongs to the technical field of ground paving materials, and relates to a composite floor, in particular to an impregnated paper veneer OSB composite floor which sequentially comprises a wear-resistant layer, an impregnated paper layer and an OSB base material main body layer from top to bottom, a buffer layer is arranged between the impregnated paper layer and the OSB base material main body layer, the buffer layer is a high-density fiberboard, and the thickness of the buffer layer is 0.5-1.5 mm; the thickness of the OSB base material main body layer is 8-18 mm, and the water content is 5-14%. The invention further discloses a production process of the floor. Compared with a common structure floor and other floors, fast-growing wood and the like can be effectively utilized, the wood is comprehensively utilized to the maximum extent, and the cost is reduced; and moreover, the loss of equipment can be effectively reduced, and various physical and mechanical properties of the produced floor can meet the requirements of industrial standards. In addition, the structure of the impregnated paper veneer OSB composite floor is repeatedly and strictly designed, the size stability is better, and the impregnated paper veneer OSB composite floor can be safely used under the floor heating condition through floor heating condition detection.

Description

Technical Field

[0001] The invention belongs to the technical field of floor paving materials, and relates to composite floors, in particular to an impregnated paper veneer OSB composite floor and a production process thereof. Background Art

[0002] Multi-layer solid wood composite flooring is a popular decoration in the furniture and building materials industry. However, with the shortage of forest resources, the surface with beautiful patterns is decreasing. It is an urgent topic to effectively improve the comprehensive utilization rate of wood resources, alleviate the current tight supply of wood resources, respond to the national green development, implement the policy of dual carbon goals, and strengthen the construction of ecological civilization in my country. Oriented strand board (OSB) is processed from natural fast-growing and low-quality materials. It has the advantages of environmental protection, high mechanical strength and good dimensional stability. The impregnated paper facing composite flooring based on OSB not only meets the requirements of the floor, but also gives the product the advantages of OSB base material. Deep processing of OSB into impregnated paper facing composite flooring for home decoration will be one of the important ways for the industry to save wood resources.

[0003] Chinese patent CN105464335A discloses an impregnated paper-faced OSB composite floor, which includes an OSB substrate layer, a veneer layer, a buffer paper layer, a balancing paper layer, and a sprayed decorative paper layer from bottom to top; wherein the longitudinal static bending strength of the OSB substrate layer is ≥50MPa, and the water absorption thickness expansion rate is ≤12%; the veneer layer is a bleached poplar veneer with a thickness of 0.6-1.2mm; the buffer paper layer has a thickness of 0.4-0.6mm and an impregnated kraft paper with a glue amount of more than 80%; the balancing paper layer weighs 70-80g and has a glue amount of 100-120%; the sprayed decorative paper weighs 70-80g and has a glue amount of 100-120%. However, this technology has the disadvantages of complex molding process and high cost. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the present invention discloses an impregnated paper veneer OSB composite floor, which has a simple preparation process and meets various performance requirements under floor heating conditions.

[0005] Technical Solution

[0006] The invention discloses an OSB composite floor with an impregnated paper surface, which comprises, from top to bottom, a wear-resistant layer, an impregnated paper layer and an OSB substrate main layer, wherein a buffer layer is arranged between the impregnated paper layer and the OSB substrate main layer, wherein the impregnated paper layer bonds the wear-resistant layer and the buffer layer; the buffer layer is a high-density fiberboard with a thickness of 0.5 to 1.5 mm; the thickness of the OSB substrate main layer is 8 to 18 mm, and the moisture content is 5 to 14%.

[0007] In the preferred disclosed example of the present invention, the wear-resistant layer is an aluminum oxide wear-resistant layer, which has the function of enhancing the wear resistance of the floor surface, has high hardness and wear resistance, and can effectively prevent the wooden floor from being scratched, worn, burned, etc.

[0008] In the preferred disclosed example of the present invention, the impregnated paper layer is a decorative paper impregnated with melamine-modified urea-formaldehyde resin. The surface of the decorative paper not only includes the texture of wood, but also has paint, special plane and antique effects, so that the wood texture and paint effect are compounded, and it has natural wood texture, antique effect, paint treatment effect, clear and natural texture, various texture colors, anti-oxidation, anti-ultraviolet radiation, anti-fading, and long service life.

[0009] Furthermore, the wear-resistant layer and the buffer layer can achieve good bonding strength by high-temperature pressing and curing the decorative paper impregnated with melamine-modified urea-formaldehyde resin.

[0010] In the preferred disclosed example of the present invention, the high-density fiberboard is used as a buffer layer to prevent the impregnated paper from being directly glued to the main layer of the OSB substrate. The density of the high-density fiberboard is ≥0.85g / m 3 .

[0011] In the preferred disclosed example of the present invention, the main layer of the OSB substrate is made of small-diameter wood / fast-growing wood as raw material, processed into flakes (generally 40-100 mm long, 5-20 mm wide, 0.3-0.7 mm thick, deoiled, dried, glued, oriented paved (surface flakes are arranged longitudinally, core flakes are arranged transversely), hot pressing and other processes to form a directional structural board. Furthermore, the OSB substrate is thinning wood / fast-growing wood such as eucalyptus, fir, pine, and poplar.

[0012] In a preferred disclosed example of the present invention, the buffer layer and the main layer of the OSB substrate are coated with an environmentally friendly melamine-modified urea-formaldehyde resin and bonded together, which has good bonding strength.

[0013] Another object of the present invention is to disclose a production process of the above-mentioned impregnated paper veneer OSB composite floor.

[0014] A production process of an impregnated paper veneer OSB composite floor comprises the following steps:

[0015] S1. Preparation of OSB substrate:

[0016] (1) Veneer slicing: After the purchased wood blanks are steamed, they are sliced ​​into the required thickness and size;

[0017] (2) Veneer drying: The veneer after flaking is dried at 103±5℃, and the moisture content after drying is 6-14%;

[0018] (3) Paving: The paving assembly is carried out by using a directional paving device, wherein the surface flakes are arranged longitudinally and the core flakes are arranged transversely;

[0019] (4) Hot pressing: After the blanks are assembled, they are put into the hot press for shaping;

[0020] S2. Synthesis of wear-resistant paper, impregnated paper and buffer layer: assemble the wear-resistant paper, impregnated decorative paper and high-density fiberboard in order, put them into a hot press for hot pressing, the hot pressing temperature is 150-250° C., the hot pressing time is 5-60 seconds, and the hot pressing pressure is 5-15 MPa;

[0021] S3, Lamination: Apply environmentally friendly melamine-modified urea-formaldehyde resin glue on the surface of OSB particleboard substrate, with a coating amount of 150-200g / m 2 , then cold pressing, unit pressure 0.8 ~ 0.9MPa, time is adjusted according to the thickness of the skin, generally 100 ~ 300s; then hot pressing, hot pressing pressure 10 ~ 18MPa, temperature 90 ~ 105 ℃;

[0022] S4. Balanced curing: stack the laminated boards with the bottom layer facing upwards and the other layers facing downwards, place spacers every 5 to 10 layers, and place them in a balanced room for curing for ≥ 7 days;

[0023] S5, cutting, forming, chamfering paint, wax sealing and finished product packaging.

[0024] In a preferred disclosed example of the present invention, the cutting step is to cut the balanced and cured board into strips, and then sand the back side to determine the thickness to form the strips.

[0025] In a preferred disclosed example of the present invention, the forming step is to perform tongue and groove on the floor strips.

[0026] In the preferred disclosed example of the present invention, the step of applying chamfer paint is to spray chamfer paint on the chamfered position of the floor to adapt to the color of the board surface to make it coordinated and unified.

[0027] In the preferred disclosed example of the present invention, the wax sealing step is to spray the plant series silent wax at the floor lock mortise and tenon position, and the coating amount is adjusted according to the buckle type, 20-30g / m 2 .

[0028] In the preferred disclosed example of the present invention, the finished product packaging step is to be directly packaged after the product passes the quality QC inspection and comes off the production line.

[0029] The present invention attaches the high-density fiberboard coated with impregnated paper to the surface of the OSB substrate to make an impregnated paper veneer OSB lock multi-layer composite floor: ① The impregnated paper laminated OSB composite floor not only has the decorative texture of wood on the surface, but also simulates natural wood to the greatest extent, solves the tense situation of shortage of forest resources, and thus protects natural resources; ② Compared with the existing solid wood composite floor and the existing technology, the surface does not need to be painted, the coating has a higher wear resistance, has strong adhesion with it, has a simple process, is more environmentally friendly, and has a relatively low overall cost.

[0030] Beneficial Effects

[0031] Compared with common structural floors and other floors, the present invention can not only effectively utilize fast-growing wood, maximize the comprehensive utilization of wood, and reduce costs, but also effectively reduce equipment loss, and the physical and mechanical properties of the produced floor can meet the requirements of industry standards. In addition, the structure of the impregnated paper veneer OSB composite floor has been repeatedly and rigorously designed, with better dimensional stability. After testing under floor heating conditions, it can be safely used under floor heating conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 . Schematic diagram of the structure of an OSB composite floor with impregnated paper facing, wherein: (1) a wear-resistant layer on the floor surface; (2) an impregnated paper layer; (3) a buffer layer; and (4) an OSB substrate main layer. DETAILED DESCRIPTION

[0033] The present invention is described in detail below in conjunction with the embodiments so that those skilled in the art can better understand the present invention, but the present invention is not limited to the following embodiments.

[0034] Example 1

[0035] An impregnated paper veneer OSB composite floor comprises a floor substrate body and a bonding layer attached to the body, wherein the substrate body is an OSB particle board substrate main body layer 4 with a thickness of 8 to 18 mm and a moisture content of 8 to 12%, the bonding layer on the substrate is composed of a wear-resistant layer 1, an impregnated paper layer 2 and a buffer layer 3 with a thickness of 0.5 to 1.5 mm, and the overall direction of the wood chips on the surface layer of the substrate is parallel to the direction of the decorative wood grain in the bonding layer.

[0036] Example 2

[0037] An impregnated paper veneer OSB composite floor comprises a floor substrate body and a bonding layer attached to the body, wherein the bonding layer is composed of a wear-resistant layer 1, an impregnated paper layer 2 and a buffer layer 3, and has a thickness of 0.5 to 1.5 mm. The overall direction of the wood chips on the surface layer of the substrate is parallel to the direction of the decorative wood grain in the bonding layer; the wear-resistant layer 1 is located on the impregnated paper layer 2, and plays a role in enhancing the wear resistance of the floor surface.

[0038] Example 3

[0039] An impregnated paper veneer OSB composite floor comprises a floor substrate body and a bonding layer attached to the body, wherein the substrate body is an OSB particle board substrate with a thickness of 8 to 18 mm and a moisture content of 5 to 14%, and the bonding layer on the substrate is composed of a wear-resistant layer 1, an impregnated paper layer 2 and a buffer layer 3 with a thickness of 0.5 to 1.5 mm, and the overall direction of the wood chips on the surface layer of the substrate is parallel to the direction of the decorative wood grain in the bonding layer. The wear-resistant layer 1 is located on the impregnated paper layer 2, which plays a role in enhancing the wear resistance of the floor surface. The buffer layer 3 is between the impregnated paper layer 2 and the OSB substrate main body layer 4, and the buffer layer 3 is a high-density fiberboard with a buffering and connecting effect. The impregnated paper layer 2 is a decorative paper impregnated with melamine-modified urea-formaldehyde resin, and the surface not only contains the texture of wood, but also has paint, special plane and antique effects, and has natural wood texture and antique effects.

[0040] Example 4

[0041] An impregnated paper veneer OSB composite floor comprises a floor substrate body and a bonding layer attached to the body, wherein the substrate body is an OSB particle board substrate with a thickness of 8 to 18 mm and a moisture content of 5 to 14%, and the bonding layer on the substrate is composed of a wear-resistant layer 1, an impregnated paper layer 2 and a buffer layer 3. The OSB particle board substrate main body layer 4 is processed into long flakes by special equipment, and the oriented structural board is made by processes such as deoiling, drying, gluing, directional paving, and the surface flakes are arranged longitudinally, the core layer flakes are arranged transversely, and hot pressing molding.

[0042] Example 5

[0043] An impregnated paper veneer OSB composite floor comprises a floor substrate body and a bonding layer attached to the body, wherein the substrate body is an OSB particle board substrate with a thickness of 8 to 18 mm and a moisture content of 5 to 14%, and the bonding layer on the substrate is composed of a wear-resistant layer 1, an impregnated paper layer 2 and a buffer layer 3. The bonding layer is formed by assembling the wear-resistant paper, the impregnated decorative paper and the fiberboard in sequence and placing them in a hot press for hot pressing.

[0044] Example 6

[0045] An impregnated paper veneer OSB composite floor comprises a floor substrate body and a bonding layer attached to the body, wherein the substrate body is an OSB particle board substrate with a thickness of 8 to 18 mm and a moisture content of 5 to 14%, and the bonding layer on the substrate is composed of a wear-resistant layer 1, an impregnated paper decorative layer and a buffer layer. The main layer of the OSB particle board substrate is processed into long flakes by special equipment, and the oriented structural board is made by processes such as deoiling, drying, gluing, directional paving, and the surface flakes are arranged longitudinally, the core layer flakes are arranged transversely, and hot pressing. The bonding layer is formed by assembling the wear-resistant paper, impregnated decorative paper and fiberboard in sequence, and placing them in a hot press for hot pressing. Environmentally friendly melamine-modified urea-formaldehyde resin glue is coated on the surface of the OSB particle board substrate, and then cold pressing and hot pressing are performed. The laminated panels are stacked face down and placed in a balance room for curing for ≥7 days. The substrate is cut into strips and the back is sanded to determine the thickness to form floor strips. The floor strips are tongue-and-groove-cut and the chamfered positions are sprayed with chamfer paint to suit the color of the panel surface. The floor lock mortise and tenon positions are sprayed with plant series silent wax and the panels are directly packaged after passing the quality QC inspection.

[0046] The prepared impregnated paper facing OSB composite floor has good properties and meets various performance requirements.

[0047] Table 1 Performance of impregnated paper facing OSB multi-layer composite floor

[0048]

[0049]

[0050] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the specification of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An impregnated paper veneer OSB composite floor, comprising, from top to bottom, a wear-resistant layer (1), an impregnated paper layer (2) and an OSB substrate main layer (4), a buffer layer (3) being arranged between the impregnated paper layer (2) and the OSB substrate main layer (4), characterized in that: The impregnated paper layer (2) is bonded to the wear-resistant layer (1) and the buffer layer (3); the buffer layer (3) is a high-density fiberboard with a thickness of 0.5 to 1.5 mm; the OSB substrate main layer (4) has a thickness of 8 to 18 mm and a moisture content of 5 to 14%.

2. The impregnated paper facing OSB composite floor according to claim 1, characterized in that: The wear-resistant layer (1) is an aluminum oxide wear-resistant layer.

3. The impregnated paper facing OSB composite floor according to claim 1, characterized in that: The impregnated paper layer (2) is decorative paper impregnated with melamine-modified urea-formaldehyde resin.

4. The impregnated paper facing OSB composite floor according to claim 1, characterized in that: The wear-resistant layer (1) and the buffer layer (3) are cured by high-temperature pressing of decorative paper impregnated with melamine-modified urea-formaldehyde resin.

5. The impregnated paper facing OSB composite floor according to claim 1, characterized in that: The density of the high-density fiberboard is ≥ 0.85 g / m 3 .

6. The impregnated paper facing OSB composite floor according to claim 1, characterized in that: The OSB substrate is eucalyptus, fir, pine or poplar.

7. The impregnated paper facing OSB composite floor according to claim 1, characterized in that: Environmentally friendly melamine-modified urea-formaldehyde resin is provided between the buffer layer (3) and the OSB substrate main layer (4).

8. A process for producing an impregnated paper-faced OSB composite floor as claimed in any one of claims 1 to 7, characterized in that: The steps include: S1. Preparation of OSB substrate: (1) Veneer slicing: After the purchased wood blanks are steamed, they are sliced ​​into the required thickness and size; (2) Veneer drying: The veneer after planing is dried at 103±5℃, and the moisture content after drying is 6-14%; (3) Paving: The paving assembly is carried out by using a directional paving device, wherein the surface flakes are arranged longitudinally and the core flakes are arranged transversely; (4) Hot pressing: After the blanks are assembled, they enter the hot press for shaping; S2. Synthesis of wear-resistant paper, impregnated paper and buffer layer: assemble the wear-resistant paper, impregnated decorative paper and high-density fiberboard in order, put them into a hot press for hot pressing, the hot pressing temperature is 150-250°C, the hot pressing time is 5-60s, and the hot pressing pressure is 5-15Mpa; S3, Lamination: Apply environmentally friendly melamine-modified urea-formaldehyde resin glue on the surface of OSB particleboard substrate, with a coating amount of 150-200g / m 2 , then cold pressing, unit pressure 0.8 ~ 0.9MPa, time 100 ~ 300s; then hot pressing, hot pressing pressure 10 ~ 18MPa, temperature 90 ~ 105 ℃; S4. Balanced curing: stack the laminated boards with the bottom layer facing upwards and the other layers facing downwards, place spacers every 5 to 10 layers, and place them in a balanced room for curing for ≥ 7 days; S5, cutting, forming, chamfering paint, wax sealing and finished product packaging.

9. The production process of the impregnated paper facing OSB composite floor according to claim 8, characterized in that: The cutting step is to cut the balanced and cured board into strips, and sand the back to determine the thickness into strips; the forming step is to perform tongue and groove on the floor strips; and the chamfering paint step is to spray chamfering paint on the chamfered positions of the floor.

10. The production process of the impregnated paper facing OSB composite floor according to claim 8, characterized in that: The wax sealing step is to spray the plant series silent wax on the floor lock mortise and tenon position, and the coating amount is adjusted according to the buckle type, 20-30g / m 2 The finished product packaging step is to be directly packaged after passing the quality QC inspection.

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