CN201079972Y - Bamboo composite section bar - Google Patents

Abstract

The utility model discloses bamboo-made composite profile, which comprises at least two layers of profile, and a binding material layer in the middle. The utility model is characterized in that scattered gel guiding eyes are arranged on the bamboo green layer or the bamboo yellow layer of the adhesive surface of the bamboo profile, the gel guiding eyes are penetrated through the fiber layer of the bamboo profile, and the binding material layer is infiltrated into the three dimensional embedded type binding material layer formed by the gel guiding eyes and the bamboo profile; the quantity of the gel guiding eyes is 70000 to 90000 pcs/m<2>, and the depth of the gel guiding eyes is 60 to 80 percent of the thickness of the bamboo profile; the axial distance of two adjacent gel guiding eyes is 4 to 6 mm, and the radial distance of two adjacent gel guiding eyes is 2 to 4 mm. Compared with the prior art, on the basis of retaining the bamboo green layer and the bamboo yellow layer of the bamboo profile, the adhesive bonding of the bamboo profile is realized in the utility model, and compared with the bamboo profile which removes the bamboo green layer and the bamboo yellow layer, the utilization ratio of the bamboo resource is improved by 30 to 50 percent, the gel guiding eyes penetrated through the fiber layer are arranged on the adhesive surface of the bamboo profile, the glue water and the bamboo profile form a three dimensional embedded type binding material layer, and therefore the bonding strength is greatly improved.

Description

A bamboo composite profile

technical field

The utility model relates to the field of bamboo composite profiles bonded with bamboo profiles or wooden profiles.

Background technique

Bamboo is composed of the outer bamboo green layer, the inner bamboo yellow layer and the middle fiber layer. The bamboo green layer contains a lot of wax, and the bamboo yellow layer contains a lot of organic silicon, so it cannot be bonded to other profiles, so in When bonding with other profiles, the bamboo green layer and the bamboo yellow layer must be cut off, and the fiber layer is used for bonding. This method has good adhesion and high relative strength, but the waste of materials is serious, and there are many processes at the same time, and the processing cost is high. High is not easy to industrialize. In Chinese patent 200510038523, a bonding process using isocyanate glue for bamboo green layer and wood veneer is provided. As the invention itself said, isocyanate glue is not only expensive, but also highly toxic, and requires high protection during operation. , although its dosage is small, the harm to the operator is obvious. At the same time, this composite board cannot comply with the development requirements of non-toxic and environmentally friendly.

Contents of the invention

The technical problem to be solved by the utility model is to provide a bamboo composite profile with high bonding strength by retaining the bamboo green layer and the bamboo yellow layer for the above-mentioned deficiencies in the prior art.

In order to solve the above-mentioned technical problems, the utility model adopts the following technical scheme: comprising at least 2 layers of profiles bonded to each other and an intermediate adhesive layer, and the bamboo green layer or the bamboo yellow layer on the bonding surface of the bamboo profiles is provided with a dispersed The glue guide hole is as deep as the bamboo profile fiber layer, and the glue layer penetrates into the glue guide hole and the bamboo profile to form a three-dimensional embedded glue layer.

The number of glue guide holes is 70000-90000 pieces/m ² , and the depth of the glue guide holes is 60-80% of the thickness of the bamboo profile.

The shape of the glue guide eye is cuboid, when the thickness of the bamboo profile is <6mm, the length of the glue guide eye is 2-2.5mm, and the width is 1-1.2mm; when the thickness of the bamboo profile is ≥6mm, the length of the glue guide eye is is 2.5-3mm, and the width is 1.5-2mm.

The adhesive layer is a composite layer of non-woven fabric and glue, a composite layer of paper and glue or a glue layer.

The glue is white latex, wood glue powder or resin.

The outer surface of the bamboo profile is also provided with the above-mentioned glue guide eye, and a plastic layer is compounded with the outer surface of the bamboo material layer through the glue guide eye.

Compared with the prior art, the utility model realizes the gluing of bamboo profiles and bamboo profiles on the basis of retaining the bamboo green and bamboo yellow layers of the bamboo profiles, and improves the bamboo profile compared with the bamboo profiles that remove the bamboo green and bamboo yellow layers. The resource utilization rate is 30-50%, which greatly saves raw materials and avoids the waste of bamboo materials, and sets the glue guide holes deep and deep into the fiber layer on the bonding surface of bamboo profiles. Compared with the bamboo green layer and the bamboo yellow layer, The fiber layer and the glue have good bonding properties. The glue layer penetrates into the glue guide hole and bonds with the fiber layer. The glue and the bamboo profile form a three-dimensional embedded glue layer, thereby greatly improving the glue strength, while retaining the bamboo green layer and The bamboo yellow layer retains the material with the best strength of the original bamboo, so the self-strength of the glued composite profile is also high.

The number of glue guide holes is 70000-90000/ ^m2 , and the depth of the glue guide holes is 60-80% of the thickness of the bamboo profile. After a lot of tests, when the number of glue guide holes is greater than 90000 pieces/ ^m2 , the glue guide If the density of the holes is too high, the bamboo profile is easy to crack, and its strength will be reduced. When the number of glue holes is less than 70,000/m ² , the density is small, which will affect the gluing. Therefore, the glue holes should be 70,000-90,000/m2 ² range, it not only improves the strength of the glue, but also does not crack the bamboo profile, and does not reduce its own strength.

The shape of the glue guide hole is cuboid, and the cuboid shape has good poking performance, and will not cause cracks on the surface of bamboo bamboo green or bamboo yellow, so as to ensure the bonding strength, it also prevents cracks and reduces the bamboo profile itself. Strength of.

In order to further improve the bonding strength, the bonding layer is a composite layer of non-woven fabric and glue or a composite layer of paper and glue, which improves the overall performance of the composite profile while increasing the bonding strength.

Description of drawings

Fig. 1 is a structural schematic diagram of the composite profile of the present invention.

Fig. 2 is a flow chart of the manufacturing process of the composite profile of the present invention.

Fig. 3 is a structural schematic diagram of the angle steel composite material of the present invention.

Fig. 4 is a schematic diagram of the plastic-coated surface of the composite profile of the present invention.

Fig. 5 is a schematic diagram of orthogonal gluing of bamboo boards to bamboo boards.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in detail.

Embodiment one: choose the plane board as an example, as shown in Figure 1, the lower floor is a bamboo board 1, the middle layer is an adhesive layer 2, and the upper floor is a wood board 3, which is arranged on the surface where the bamboo board 1 and the wood board 3 are bonded. There are glue guide holes 11 deep inside the bamboo board, the number of glue guide holes 11 is 70,000-90,000 pieces/m ² , the shape of the glue guide holes 11 can be cuboid, conical or other shapes, when When the thickness of the bamboo profile is less than 6mm, the length of the rectangular parallelepiped is 2-2.5mm and the width is 1-1.2mm; when the thickness of the bamboo profile is ≥6mm, the length of the rectangular parallelepiped is 2.5-3mm and the width is 1.5-2mm. The depth is 60-80% of the bamboo thickness. The glue layer 2 penetrates into the glue guide hole 11 to form a three-dimensional embedded glue layer between the wood board 3 and the bamboo board 1. The glue layer 2 can be simple glue, but in order to further increase the strength and flexibility of the bond, glue The mixture layer can also be a composite layer of non-woven fabric and glue, a composite layer of paper and glue or a glue layer, and the glue is selected from white latex, wood glue powder or resin.

Embodiment 2: Taking the angle steel material of three-layer structure as an example, at first select 2 pieces of bamboo angle steel materials and a wooden plate in the middle; secondly, process glue guide holes on the bamboo angle steel surfaces that need to be bonded, and the number of guide glue holes is 80000pcs/m ² , the shape of the glue guide hole is cuboid, the length of the cuboid is 2.5mm, and the width is 1.2mm. The glue guide hole penetrates into the bamboo green layer or the bamboo yellow layer, and its depth is 70% of the bamboo depth. Then, coat the adhesive layer on the bonding surface; then form the embryo, place the wooden board and another piece of bamboo angle steel in turn; finally high-pressure molding, put the angle steel into the press, the pressure is 3Mpa, and the time is 2- 3 hours to shape. After forming, it can also be ventilated, dried and trimmed for storage. The formed structure is shown in Figure 3, including a first bamboo layer 4, an intermediate wood layer 5, an adhesive layer 6, and a second bamboo layer 7, and glue guide holes are processed on the bamboo surface glued with the wood board.

Embodiment three: on the composite profile bamboo surface, one deck plastic layer can also be sprayed, as shown in Figure 4, 10 is the bamboo material layer, and 9 is the glue guide eye 9,8 that is processed on the bamboo material layer 10 outer surfaces, and 8 is the plastic layer.

Embodiment four: format is the manufacture method of whole bamboo plywood, tray panel for 2400X1200X12MM building formwork, see Fig. 5, wherein, 601 is bamboo material layer, 602 bamboo yellow layer, 603 bamboo green layer, 604 glued layer.

1) Selection: Select the sheet with the flattened width up to the standard, and the bamboo sheet with no or few cracks on the surface as the panel and bottom plate of the whole bamboo plywood. All others are truncated to 1250MM as the core board of the whole bamboo plywood.

2) Put the flattened bamboo sheet into ^the assembly line: the flattened sheet will automatically go through the guide glue hole for sizing, leveling, steel brush cleaning, and glue coating. 75%.

3) Artificial billet assembly: the bottom plate, core plate and face plate are assembled in three layers, the bottom plate is green facing down, the core plate is yellow facing down, the face plate is green facing up, and the three plates are orthogonal to each other.

4) High pressure: Put the base plate into the press, the pressure is 2.5-3Mpa, and the time is 2-3 hours to load and unload the plate.

Claims (7)

1. a bamboo composite profile, comprising at least 2 layers of profiles bonded to each other and an adhesive layer in the middle, characterized in that the bonding surface bamboo green layer or bamboo yellow layer of the described bamboo profile is provided with dispersed guides The glue hole is as deep as the fiber layer of the bamboo profile, and the glue layer penetrates into the glue hole and the bamboo profile to form a three-dimensional embedded glue layer. 2. The bamboo composite profile according to claim 1, characterized in that the number of said glue guide holes is 70000-90000 pieces/m ² , and the depth of said glue guide holes is 60-80% of the thickness of the bamboo profile. 3. The bamboo composite profile according to claim 1 or 2, characterized in that the axial distance between the two adjacent glue holes is 4-6mm, and the radial distance between the two adjacent glue holes is 2-6 mm. 4mm. 4. bamboo composite profile according to claim 3, it is characterized in that the shape of described glue guide eye is cuboid shape, when the thickness of bamboo profile＜6mm, the length of guide glue eye is 2-2.5mm, wide 1-1.2mm; when the thickness of the bamboo profile is ≥6mm, the length of the glue guide hole is 2.5-3mm, and the width is 1.5-2mm. 5. The bamboo composite profile according to claim 1, wherein the adhesive layer is a composite layer of non-woven fabric and glue, a composite layer of paper and glue or a layer of glue. 6. The composite profile according to claim 5, characterized in that said glue is white latex, wood glue powder or resin. 7. The composite bamboo profile according to claim 1, characterized in that the outer surface of the bamboo profile is also provided with said glue-guiding eye, and a plastic layer is composited with the outer surface of the bamboo layer through the glue-guiding eye.

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