阅读说明：本技术 一种新型无醛实木复合地板用胶合板 (Novel aldehyde-free plywood for solid wood composite floor ) 是由 张子铭 张超 彭立民 李小科 姜俊 于 2021-07-20 设计创作，主要内容包括：本申请实施例公开了一种新型无醛实木复合地板用胶合板,包括相互交错、层叠设置的多个单板层,相邻的两个所述单板层之间通过胶黏剂层胶黏复合,所述过胶黏剂层为无醛胶黏剂层,所述单板层之上设置有多个击穿孔,所述击穿孔内填充有连接相邻的两个所述胶黏剂层的胶钉。使无醛胶黏剂也能够获得相对较高的胶合强度,而实现绿色的新型无醛实木复合地板用胶合板。(The embodiment of the application discloses novel no aldehyde plywood square for solid wood laminate flooring, including a plurality of veneer layers that crisscross each other, range upon range of setting, adjacent two glue through gluing agent layer between the veneer layer and compound, cross gluing agent layer and be no aldehyde gluing agent layer, be provided with a plurality of holes of hitting on the veneer layer, puncture the downthehole packing and connect adjacent two the staple on gluing agent layer. The formaldehyde-free adhesive can obtain relatively high bonding strength, and the green novel formaldehyde-free plywood for the solid wood composite floor is realized.)

1. The utility model provides a novel no aldehyde plywood square for solid wood composite floor, includes a plurality of veneer layers (100) of crisscross each other, range upon range of setting, adjacent two it is compound through gluing agent layer (200) gluing between veneer layer (100), gluing agent layer (200) are for there being not aldehyde gluing agent layer, a serial communication port, be provided with a plurality of perforation holes (110) on veneer layer (100), it is adjacent two to fill in perforation hole (110) glue nail (210) of gluing agent layer (200) of connection.

2. The plywood for novel aldehyde-free solid wood composite floor according to claim 1, wherein said adhesive layer (200) is a hot melt adhesive paper layer.

3. The plywood for the novel aldehyde-free solid wood composite floor according to claim 2, wherein the adhesive layer (200) is a polyurethane hot melt adhesive layer.

4. The plywood for a novel aldehyde-free solid wood composite floor according to claim 1, wherein said glue nails (210) are formed by hot-melt infiltration of said adhesive layer (200) into said perforated holes (110).

5. Plywood for aldehyde-free solid wood composite flooring according to claim 1, characterized in that the perforations (110) are arranged in an array on the veneer layer (100).

6. The plywood for the novel aldehyde-free solid wood composite floor according to claim 5, wherein the longitudinal distance between two adjacent punching holes (110) is 0.50mm to 6.00mm, and the transverse distance is 0.25mm to 4.00 mm.

7. Plywood for novel formaldehyde-free solid wood composite floors according to claim 5, characterized in that the perforations (110) of two adjacent veneer layers (100) are arranged in a superposition, and the glue nails (210) in the same position of the perforations (110) of a plurality of veneer layers (100) form a glue nail axis.

8. The plywood for the novel aldehyde-free solid wood composite floor according to claim 7, wherein the perforated holes (110) have a hole diameter of 0.05mm to 0.45 mm.

9. The plywood for a novel aldehyde-free solid wood composite floor according to claim 5, wherein said striking holes (110) of two adjacent veneer layers (100) are staggered.

10. The plywood for the novel aldehyde-free solid wood composite floor according to claim 9, wherein the perforated holes (110) have a hole diameter of 0.07mm to 0.58 mm.

Technical Field

The invention relates to the technical field of floor paving materials, in particular to a novel aldehyde-free plywood for a solid wood composite floor.

Background

Avoiding the use of precious hard broad-leaved wood is a major issue in the green building material manufacturing industry. In order to save the use of precious hard broad-leaved wood, the solid wood composite floor taking plywood (multilayer wood composite artificial board) as a base material is a common and environment-friendly floor paving material. The plywood is an artificial board formed by overlapping and compounding a plurality of layers of veneers in a staggered mode, each veneer layer is bonded and compounded through an adhesive, and common plywood adhesives comprise a urea-formaldehyde resin adhesive, a phenolic resin adhesive and the like.

In order to reduce or eliminate formaldehyde release of the adhesive, aldehyde-free adhesives are adopted as the adhesive of the plywood in the prior art, but the bonding strength of the aldehyde-free adhesives is inferior to that of the conventional adhesives, so that the aldehyde-free adhesives are difficult to be widely applied to production and manufacturing of the adhesives.

Disclosure of Invention

The present invention is directed to overcoming the above problems, and therefore, to provide a novel plywood for aldehyde-free solid composite flooring, which enables an aldehyde-free adhesive to obtain a relatively high bonding strength, thereby realizing a green novel plywood for aldehyde-free solid composite flooring.

In order to achieve the above object, an embodiment of the present invention provides a novel plywood for a formaldehyde-free solid wood composite floor, including a plurality of veneer layers which are staggered and stacked, wherein two adjacent veneer layers are bonded and compounded through an adhesive layer, the adhesive layer is a formaldehyde-free adhesive layer, a plurality of punching holes are arranged on the veneer layers, and the punching holes are filled with adhesive nails connecting the two adjacent adhesive layers.

Borrow by above-mentioned structure, pass the veneer layer (through hitting the perforation) and connect two adjacent gluing agent layers through another glue nail, mechanical improvement gluing agent layer is to the bonding strength of veneer layer, makes no aldehyde adhesive also can obtain higher bonding strength relatively, and realizes green novel no aldehyde plywood for solid wood composite floor.

Preferably, the adhesive layer is a hot melt adhesive paper layer.

Preferably, the adhesive layer is a polyurethane hot-melt adhesive layer.

Preferably, the glue nail is formed by hot melting and penetrating the adhesive layer to the punching hole.

In this technical scheme, the adhesive nail is formed in hitting the hole by the hot melt infiltration of the gluing agent in two gluing agent layers on the veneer layer, under to gluing agent layer, adhesive nail form the space frame jointly, pass through the space frame with a plurality of veneer layers outside the adhesive's adhesive bonding effect, assist with the net bundle effect, and strengthen the bonding strength between each veneer layer.

Preferably, the perforations are arranged in an array on the veneer layer.

Preferably, the longitudinal distance between two adjacent punching holes is 0.50 mm-6.00 mm, and the transverse distance is 0.25 mm-4.00 mm.

In this technical solution, the "longitudinal direction" refers to a length direction of a veneer layer of a fiber bundle of a veneer, and the "transverse direction" refers to a width direction perpendicular to the veneer layer of the fiber bundle. Because the width direction size change rate of veneer layer is great relatively, reduces the interval between two adjacent perforation, increases the density that sets up of horizontal glue nail, can be comparatively effectual the equilibrium by the glue nail form to the each directional dimensional change of veneer layer drag, tie, the deformation (dimensional change) of veneer layer is more even in addition, reduces the veneer and warp to improve the bonding strength between the veneer layer in this aspect.

Preferably, the punching holes in two adjacent veneer layers are overlapped, and the glue nails in the punching holes at the same position on the multiple veneer layers form glue nail shafts.

Preferably, the hole diameter of the punching hole is 0.05mm to 0.45 mm.

Preferably, the perforated holes on two adjacent veneer layers are staggered.

Preferably, the hole diameter of the punching hole is 0.07mm to 0.58 mm.

In summary, compared with the prior art, the invention has the beneficial effects that: the formaldehyde-free adhesive can obtain relatively high bonding strength, and the green novel formaldehyde-free plywood for the solid wood composite floor is realized.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive exercise.

FIG. 1 is a schematic structural diagram of a plywood for a novel aldehyde-free solid wood composite floor according to example 1 of the present invention;

FIG. 2 is a schematic cross-sectional view of a through-hole according to embodiment 1 of the present invention;

FIG. 3 is a schematic cross-sectional view of a glue nail according to embodiment 1 of the present invention;

FIG. 4 is a schematic cross-sectional view of a through-hole according to embodiment 2 of the present invention;

fig. 5 is a schematic cross-sectional view of a glue nail according to embodiment 2 of the present invention;

FIG. 6 is a schematic cross-sectional view of a through-hole according to embodiment 3 of the present invention;

fig. 7 is a comparison table of the bonding strength test results of the plywood for the novel formaldehyde-free solid wood composite floor according to the embodiment 1 and the embodiment 2 of the invention.

In the figure: 100-veneer layer, 110-perforated hole, 200-adhesive layer, 210-glue nail.

Detailed Description

In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Example 1: referring to fig. 1, 2 and 3, the novel plywood for formaldehyde-free solid wood composite floor includes a plurality of veneer layers 100 which are staggered and stacked, two adjacent veneer layers 100 are bonded and compounded through an adhesive layer 200, the adhesive layer 200 is a formaldehyde-free adhesive layer, a plurality of punching holes 110 are arranged on the veneer layers 100, and the punching holes 110 are filled with adhesive nails 210 connecting the two adjacent adhesive layers 200. In this embodiment, the veneer layer 100 is a poplar veneer, the number of layers is 11, and the total thickness is 16 mm.

Specifically, the adhesive layer 200 is a hot-melt adhesive paper layer, and preferably, the adhesive layer 200 is a polyurethane hot-melt adhesive layer (rolled PUr adhesive). After 11 veneer layers 100 and 10 adhesive layers 200 are alternately stacked, the adhesive layers 200 are thermally melted in a hot press state to penetrate the adhesive into the perforated holes 110, thereby forming the glue nails 210 in the perforated holes 110.

The punched hole 110 may be formed by any one of the prior art methods such as high voltage breakdown, infrared breakdown, mechanical breakdown, etc., and the punched hole 110 is a cylindrical through hole. As a preferred embodiment, the perforations 110 are arranged in a rectangular array on the veneer layer 100. The longitudinal spacing between two adjacent striking holes 110 is 0.50mm to 6.00mm (e.g., 2.80mm), and the lateral spacing is 0.25mm to 4.00mm (e.g., 2.80 mm). Therefore, after two adjacent veneer layers 100 are laminated, the arrangement positions of the punching holes 110 on the two adjacent veneer layers are overlapped, and after hot-pressing and curing, the glue nails 210 in the punching holes 110 at the same position on the multiple veneer layers 100 form a glue nail shaft, so that the glue layers and the glue nails form a three-dimensional frame together. The hole diameter of the perforated hole 110 is 0.05mm to 0.45mm (e.g., 0.10mm), and at this time, the hot-melt adhesive in the adhesive layer 200 can penetrate into the perforated hole 110 to form the glue nail 210, and the surface area of the glue nail 210 is relatively small, so that the existence of the glue nail 210 on the veneer layer 100 on the outermost layer does not affect the surface flatness and the surface strength thereof.

Example 2: embodiment 2 differs from embodiment 1 in that, as shown in fig. 4 and 5, the longitudinal interval between two adjacent striking holes 110 is 4.50mm, and the lateral interval is 2.25mm, so that the striking holes 110 on two adjacent veneer layers 100 are staggered. In this case, the hole diameter of the punching hole 110 should be relatively large to ensure the lateral binding force, and the hole diameter of the punching hole 110 is preferably 0.07mm to 0.58mm (e.g., 0.35 mm). The solution of example 2 is easier to produce than that of example 1, but the formed glue nail is relatively thick, and the actual thickness of the adhesive layer 200 is relatively thin.

Example 3: embodiment 3 differs from embodiment 2 in that, referring to fig. 6, the striking hole 110 is a truncated cone-shaped through hole. The aperture of the minimum aperture of the punching hole 110 is 0.05 mm-0.08 mm, and the inclination angle of the circular truncated cone generatrix of the punching hole 110 is 2-4 degrees.

The advantage of such an arrangement is that, in fact, the adhesive entering the striking hole 110 permeates into the adhesive layer 200 located on the bottom side of the circular truncated cone of the striking hole 110, so that the penetration of the adhesive can be easier; meanwhile, the adhesive penetrating into the perforation hole 110 is connected with the adhesive layers 200 of the adjacent layers, and compared with the connection of the two adhesive layers 200 in the perforation hole 110, the connection strength of the connection mode is relatively higher; on the other hand, the front surface and the back surface are formed on the plywood formed by pressing, and the side of the top surface of the truncated cone of the perforated hole 110 of the veneer layer 100 at the outermost layer is used as the front surface of the plywood, so that the influence of the perforated hole 110 on the surface hardness, the surface flatness and the mechanical strength of the plywood can be ignored.

The results of testing the bonding strength of the plywood for aldehyde-free parquet of examples 1, 2 and 3 are shown in fig. 7, wherein control 1 is a commercially available 11-ply plywood bonded by urea-formaldehyde resin adhesive, and control 2 is a commercially available 11-ply plywood bonded by rolled PUr adhesive. The experimental method was performed with plywood for the LY/T1738-.

The foregoing description is for the purpose of illustration and is not for the purpose of limitation. Many embodiments and many applications other than the examples provided will be apparent to those of skill in the art upon reading the above description. The scope of the present teachings should, therefore, be determined not with reference to the above description, but should instead be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. The disclosures of all articles and references, including patent applications and publications, are hereby incorporated by reference for all purposes. The omission in the foregoing claims of any aspect of subject matter that is disclosed herein is not intended to forego the subject matter and should not be construed as an admission that the applicant does not consider such subject matter to be part of the disclosed subject matter.