Flame-retardant impregnated paper laminated solid wood composite floor

Abstract

The utility model relates to a flame-retardant impregnated paper layer compacted solid wood composite floor which comprises a base material layer, a balance layer is bonded on the lower surface of the base material layer, and a composite layer is arranged on the upper surface of the base material layer. The composite layer comprises an inorganic fiberboard layer adhered to the upper end of the base material layer, an impregnated bond paper layer arranged on the upper surface of the inorganic fiberboard layer and a wear-resistant layer arranged on the upper surface of the impregnated bond paper layer. According to the scheme, the inorganic fiberboard has the characteristics of no formaldehyde, high density and low water absorption, so that the formaldehyde emission level of the impregnated paper layer compacted solid wood composite floor can stably reach the ENF level, the water absorption thickness swelling rate is obviously lower than that of a high-density fiberboard, and the problems that the high-density fiberboard is high in formaldehyde emission and easy to absorb water and swell can be effectively solved. In addition, the inorganic fiberboard has efficient flame-retardant performance, and can endow the solid wood composite floor with a flame-retardant function, so that the fireproof grade of the product stably reaches the B1 (C) grade.

Description

Technical Field

[0001] The utility model relates to the technical field of solid wood composite flooring, in particular to a flame retardant impregnated paper laminated solid wood composite flooring. Background Art

[0002] At present, there are two main types of impregnated paper laminated solid wood composite flooring. One is to lay the impregnated paper on the plywood substrate, add a wear-resistant surface film paper or a wear-resistant material layer on the surface of the special paper, and then heat press and form the floor; the other is to laminate the impregnated paper with high-density fiberboard, then lay it on the plywood substrate, add a wear-resistant surface film paper or a wear-resistant material layer on the surface of the special paper, and then heat press and form the floor. The former has higher requirements for the plywood substrate, resulting in increased production costs. The high-density fiberboard used in the latter has the problem of easy water absorption and expansion, and high formaldehyde release. At the same time, as consumers pay more attention to indoor fire safety, solid wood composite flooring with flame retardant function is becoming more and more popular among consumers. Summary of the invention

[0003] In order to solve the above problems, the purpose of the utility model is to provide a flame-retardant impregnated paper laminated solid wood composite floor. The solid wood composite floor adopts an inorganic fiberboard layer and has the characteristics of formaldehyde-free moisture-proof (low water absorption) and structural stability (high density). It can effectively solve the problems of high formaldehyde release and easy water absorption and expansion caused by the use of high-density fiberboard in existing solid wood composite floors. At the same time, the inorganic fiberboard layer has high-efficiency flame-retardant properties, which can give the solid wood composite floor a flame-retardant function.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0005] A flame-retardant impregnated paper laminated solid wood composite floor, comprising a substrate layer, characterized in that a balancing layer is bonded to the lower surface of the substrate layer, and a composite layer is provided on the upper surface of the substrate layer; the composite layer comprises an inorganic fiber board layer bonded to the upper end of the substrate layer, an impregnated film paper layer arranged on the upper surface of the inorganic fiber board layer, and a wear-resistant layer arranged on the upper surface of the impregnated film paper layer.

[0006] Preferably, the inorganic fiberboard layer is a man-made board made of bamboo fiber and inorganic adhesive.

[0007] Preferably, the thickness of the inorganic fiber board layer is 1.0-1.2 mm.

[0008] Preferably, the upper and lower surfaces of the substrate layer are bonded to the inorganic fiber board layer and the balancing layer by means of an ENF grade urea-formaldehyde resin adhesive.

[0009] Preferably, the substrate layer is a plywood substrate, made of any one of eucalyptus, poplar and pine.

[0010] Preferably, the thickness of the plywood substrate is 6-19 mm.

[0011] Preferably, the balancing layer is a beech veneer layer.

[0012] The utility model adopts the above technical solution and has the following beneficial effects:

[0013] The main material of the solid wood composite floor is an inorganic fiberboard layer, and the inorganic fiberboard layer is a man-made board made of bamboo fiber and inorganic adhesive. Specifically, the bamboo fiber is glued with an inorganic adhesive, laid, and hot-pressed to form the agricultural and forestry fiber man-made board (inorganic fiberboard).

[0014] The above-mentioned inorganic fiberboard has the characteristics of formaldehyde-free, high density, and low water absorption (moisture-proof), so that the formaldehyde emission level of the impregnated paper laminated solid wood composite flooring can stably reach the ENF level, and the water absorption thickness expansion rate is significantly lower than that of the high-density fiberboard, which can effectively solve the problems of high formaldehyde emission and easy water absorption and expansion of high-density fiberboard.

[0015] In addition, inorganic fiberboard has high-efficiency flame-retardant properties, which can give solid wood composite flooring a flame-retardant function, so that the product's fire protection level can stably reach B1 (C) level. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the planar structure of a flame-retardant impregnated paper laminated solid wood composite floor. DETAILED DESCRIPTION

[0017] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0018] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0019] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "plurality" means two or more, unless otherwise clearly defined.

[0020] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0022] like Figure 1 A flame-retardant impregnated paper laminated solid wood composite floor is shown, comprising a substrate layer 1, a balancing layer 2 is bonded to the lower surface of the substrate layer 1, and a composite layer 3 is provided on the upper surface of the substrate layer 1; the composite layer 3 comprises an inorganic fiber board layer 31 bonded to the upper end of the substrate layer 1, an impregnated film paper layer 32 arranged on the upper surface of the inorganic fiber board layer 31, and a wear-resistant layer 33 arranged on the upper surface of the impregnated film paper layer 32; and the inorganic fiber board layer 31 is a man-made board made of agricultural and forestry fibers.

[0023] In the above scheme, the flame-retardant impregnated paper laminated solid wood composite flooring comprises, from top to bottom, a wear-resistant layer, an impregnated film paper layer (decorative layer), an inorganic fiber board layer, a substrate layer and a balancing layer, wherein the wear-resistant layer, the impregnated film paper layer and the inorganic fiber board layer constitute a composite layer, and the upper and lower surfaces of the substrate layer are respectively bonded to the inorganic fiber board layer and the balancing layer under the composite layer.

[0024] The inorganic fiberboard layer is a man-made board made of bamboo fiber and inorganic adhesive. Specifically, the bamboo fiber is bonded with an inorganic adhesive, paved, and hot-pressed to form the agricultural and forestry fiber man-made board (inorganic fiberboard). The inorganic adhesive is low in cost and bamboo fiber is easy to obtain, which makes the cost of the inorganic fiberboard very low and reduces the production cost. In addition, the above-mentioned inorganic fiberboard has the characteristics of formaldehyde-free, high density, and low water absorption (moisture-proof), so that the formaldehyde emission level of the impregnated paper laminated solid wood composite floor can stably reach the ENF level, and the water absorption thickness expansion rate is significantly lower than that of the high-density fiberboard, which can effectively solve the problem of high formaldehyde emission and easy water absorption and expansion of high-density fiberboard. In addition, the inorganic fiberboard has the performance of high-efficiency flame retardancy, which can give the solid wood composite floor a flame retardant function, so that the product fire protection level can stably reach B1 (C) level.

[0025] Furthermore, the thickness of the inorganic fiber board layer 31 is 1.0-1.2 mm.

[0026] Furthermore, the upper and lower surfaces of the substrate layer are bonded to the inorganic fiber board layer 31 and the balancing layer 2 by using an ENF grade urea-formaldehyde resin adhesive. In this technical solution, bonding by using an ENF grade urea-formaldehyde resin adhesive is more environmentally friendly.

[0027] Furthermore, the substrate layer 1 is a plywood substrate, which is made of any one of eucalyptus, poplar and pine. In this technical solution, since it is a multi-layer composite floor and the density of the inorganic fiberboard is high, the requirements for the plywood substrate do not need to be too high, and it can be made of any one of eucalyptus, poplar and pine, which is easy to obtain and low in cost.

[0028] Furthermore, the thickness of the plywood substrate is 6-19 mm.

[0029] Furthermore, the balancing layer 2 is a beech veneer layer.

[0030] The production steps of a flame retardant impregnated paper laminated solid wood composite floor are as follows:

[0031] Step (1): from top to bottom, hot-press the wear-resistant layer, the impregnated film paper, and the inorganic fiberboard, the hot-pressing temperature is 180-190° C., the hot-pressing unit pressure is 2-2.2 MPa, and the hot-pressing time is 10-15 s to obtain an impregnated paper composite inorganic fiberboard (composite layer).

[0032] Step (2): Gluing and assembling: ENF grade urea-formaldehyde resin adhesive is evenly coated on the plywood substrate, with the glue application amount on one side being 200-250 g / m2. The impregnated paper composite inorganic fiberboard (composite layer) is neatly attached to the upper surface of the plywood substrate, and the beech veneer is attached to the lower surface.

[0033] Step (3): cold press the assembled board with a unit pressure of 0.6 MPa for 40 minutes, and then hot press at a temperature of 85-95°C, a unit pressure of 0.2-0.3 MPa, and a hot press time of 540-720 seconds. After hot pressing, the flame-retardant impregnated paper laminated solid wood composite floor is obtained through curing, trimming, slicing, sanding, grooving, painting and other processes.

[0034] In this specific embodiment, for the two existing impregnated paper laminated solid wood composite floorings, one two-layer structure has high requirements for the plywood substrate, which in turn causes high costs, and the other structure uses high-density fiberboard as the main material, which is easy to absorb water and swell, has high formaldehyde release, and the existing household wooden boards have high requirements for flame retardancy. This solution uses an inorganic fiberboard layer to replace the high-density fiberboard, so that the flame-retardant impregnated paper laminated solid wood composite flooring is composed of a wear-resistant layer, an impregnated film paper layer, an inorganic fiberboard layer, a plywood substrate and a beech veneer from top to bottom. The wear-resistant layer, the impregnated film paper layer and the inorganic fiberboard layer constitute a composite layer, and the upper and lower surfaces of the plywood substrate are respectively bonded to the composite layer and the balancing layer.

[0035] Based on the characteristics of inorganic fiberboard such as high-efficiency flame retardancy, formaldehyde-free moisture-proof (low water absorption), insect-proof and anti-corrosion, and structural stability (high density), the formaldehyde emission level of flame-retardant impregnated paper laminated solid wood composite flooring can stably reach the ENF level, and the water absorption thickness expansion rate is significantly lower than that of high-density fiberboard, and the fire protection level reaches B1 (C), thus effectively solving the problems of high-density fiberboard's high formaldehyde emission and easy water absorption and expansion, and at the same time greatly improving the flame retardant properties of solid wood composite flooring.

[0036] It should be noted here that due to the low cost and easy availability of bamboo fiber and inorganic adhesives used to make inorganic fiberboard, the cost of the composite floor in this case is low, and there is no need to use an expensive two-layer composite floor structure based on high-quality plywood as the base material.

[0037] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0038] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and purpose of the present invention.

Claims

1. A flame retardant impregnated paper laminated solid wood composite floor, comprising a substrate layer (1), characterized in that: A balancing layer (2) is bonded to the lower surface of the substrate layer (1), and a composite layer (3) is provided on the upper surface of the substrate layer (1); the composite layer (3) comprises an inorganic fiber board layer (31) bonded to the upper end of the substrate layer (1), an impregnated adhesive film paper layer (32) arranged on the upper surface of the inorganic fiber board layer (31), and a wear-resistant layer (33) arranged on the upper surface of the impregnated adhesive film paper layer (32).

2. The flame retardant impregnated paper laminated solid wood composite floor according to claim 1, characterized in that: The inorganic fiber board layer (31) is a man-made board made of bamboo fibers and an inorganic adhesive.

3. The flame retardant impregnated paper laminated solid wood composite floor according to claim 2, characterized in that: The thickness of the inorganic fiber board layer (31) is 1.0-1.2 mm.

4. The flame retardant impregnated paper laminated solid wood composite floor according to claim 1, characterized in that: The upper and lower surfaces of the substrate layer (1) are NF The inorganic fiberboard layer (31) and the balancing layer (2) are bonded with a high-grade urea-formaldehyde resin adhesive.

5. The flame retardant impregnated paper laminated solid wood composite floor according to claim 4, characterized in that: The substrate layer (1) is a plywood substrate, and is made of any one of eucalyptus, poplar and pine.

6. The flame retardant impregnated paper laminated solid wood composite floor according to claim 5, characterized in that: The thickness of the plywood substrate is 6-19 mm.

7. The flame retardant impregnated paper laminated solid wood composite floor according to claim 1, characterized in that: The balancing layer (2) is a beech veneer layer.

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