CN2195421Y

CN2195421Y - Bamboo plywood sheet

Info

Publication number: CN2195421Y
Application number: CN 94218435
Authority: CN
Inventors: 朱福民; 俞允; 罗传德; 郑肇明; 朱善行; 陈永麟; 邢杜娟; 任治平; 黄河浪; 许炳煌
Original assignee: QINGDAO JINYUAN CO
Current assignee: QINGDAO JINYUAN CO
Priority date: 1994-08-18
Filing date: 1994-08-18
Publication date: 1995-04-26
Anticipated expiration: 2004-08-18

Abstract

The utility model relates to a bamboo plywood sheet with high strength, particularly a bamboo substance plywood sheet for container baseboards, which comprises a face plate and a sole plate formed by aequilate and equally thick bamboo slices, and a core board composed of the crossing of bamboo boards with dissimilar thickness. Moisture-proof adhesive mixed with antiseptic is coated on the crossed surface of simple bamboo plates, and phenolic resin sole plate coating or glass fiber reinforced plastic coat is coated on the surfaces of the face plate and the sole plate. The utility model has the characteristics of abundant resource, cheap price, low material utilization, stable product quality, small thickness tolerance, small discrepancy of longitudinal and transversal mechanical properties, high bonding strength, etc.

Description

Bamboo plywood sheet

The utility model relates to a kind of high-strength bamboo veneer board, especially a kind of used for bottom plate of container bamboo plywood.International Patent classificating number is B27N.

In decades, container bottom board is owing to be subjected to the specification requirement of strict physical and mechanical property, and the high requirement on the roller shear intensity, so rely on the sheet material of frigid zone hardwood, tropical hard wood or the multi-plywood manufacturing of making always with these seeds, yet these seeds are long growth period, the a large amount of felling makes these hardwood resource exhaustions, caused the not enough and price rising of the container bottom board supply of material, and therefore selecting for use other materials to substitute and making container bottom board is the task of top priority.

Wood substituted by bamboo, constantly opening up the bamboo wood application is to alleviate forest reserves poorness, an effective technology measure of improving the ecological environment.Relevant units at home and abroad has adopted following several processing methods in bamboo plywood production at present, as CN100368A, discloses a kind of bamboo plywood that mao bamboon is made by technologies such as softening flattenings.Owing to adopt pressurization to flatten, make on the bamboo clappers of formation and produce dry, thereby directly have influence on bonding strength, and before softening the flattening during the sawed-off blanking of former material not according to the sorting of bamboo wood position, the density difference owing to the different parts bamboo wood causes the heterogeneity any combination thereof to cause thickness deviation, secondly softening flattening process route is long, energy resource consumption is big, defectives such as cost height, and a kind of container bamboo plywood is disclosed at CN2161443Y, it is to dry behind the inner skin of a bamboo stem impregnation with certain thickness and width, form by cure under pressure after mould is adorned in the direction layering in length and breadth, but most of process is subjected to manual operations in this technology, the technology circuit is long, small scale, do not have quality certification system, thickness deviation is big, and the section structure level is not clear, the space is big, mechanical property difference is big in length and breadth, quality instability, defective such as stock utilization is low.

The purpose of this utility model is to overcome above-mentioned shortcoming, and a kind of high-strength bamboo veneer board is provided, and it has constant product quality, and thickness deviation is little, and mechanical property difference is little in length and breadth, characteristics such as bonding strength height.

The purpose of this utility model is realized by following technical solution: a kind of high-strength bamboo veneer board, it comprises that the bamboo veneer that is made of wide uniform thickness bamboo chip intersects the central layer of forming in length and breadth as panel and base plate and by the bamboo veneer of different-thickness, scribbles the moisture-proof adhesive that mixes anticorrisive agent on the bamboo veneer phase cross surface.Wherein the bamboo chip of wide uniform thickness is sawed-off by former bamboo branch position, cut open bamboo, layering, trimming and make, the bamboo veneer is the bamboo chip of above-mentioned wide uniform thickness to be formed or the bamboo chip of above-mentioned wide uniform thickness is heating and curing on the jigsaw machine with adhesive tape through the nylon wire braiding be combined into the bamboo veneer.

The further technical solution of the utility model is to scribble phenolic resins base plate coating or glass fibre reinforced plastic coating on the high-strength bamboo veneer board surface.The marine glue mixture is a phenolic resin glue, neoprene resin marine glue or other waterproof resin glue commonly used.Anticorrisive agent is Bei Xilemu or anticorrisive agents such as Rui Dalemu, Rui Dasong (being produced by Qingdao Ruida Formwork Series Co. or Jin Yuan company); Also available bamboo bits veneer of central layer or other plant fiber veneer are formed.Vertical bamboo veneer that panel and base plate can be single vertical, two vertical bamboo veneer or high compression ratio constitutes.

High-strength bamboo veneer board of the present utility model can be used for container bottom board, it is the substitute material that a kind of its physical and mechanical property satisfies the novel alternative timber of trans-container base plate standard fully, have the resource abundance, cheap, the stock utilization height, the mechanization degree height, constant product quality, thickness deviation is little, and the section structure space is little, mechanical property difference is little in length and breadth, advantages such as steady quality.

Other purpose of the present utility model and advantage will further be illustrated among the described in conjunction with the accompanying drawings embodiment below.

Description of drawings is as follows:

Fig. 1 represents the sawed-off schematic diagram in former bamboo branch position;

Fig. 2 represents sawed-off former bamboo is cutd open the schematic diagram of well-thought-out plan bar;

Fig. 3 represents bamboo bar after the shaping is become the schematic diagram of wide uniform thickness bamboo chip after layering is handled;

Fig. 4 represents that the bamboo bar that will cut open becomes the schematic diagram of wide uniform thickness bamboo chip after shaping is handled;

Fig. 5 represents the specification bamboo chip is formed the schematic diagram of bamboo veneer;

Fig. 6 represents that the utility model high-strength bamboo veneer board makes the schematic diagram of container bottom board.

High-strength bamboo veneer board of the present utility model is made of panel and base plate and central layer, its fabrication processing for former bamboo Divisional sawed-off → cut open the bamboo machine to cut open into bamboo cane → at the laminating machine surf green that gets on, remove to be divided into behind the inner skin of a bamboo stem the wide bamboo chip of uniform thickness and bamboo cane is flattened into the wide bamboo cane → bamboo chip of uniform thickness through trimmer and make well-thought-out plan veneer → drying machine through plate joggling apparatus or braider and be dried to moisture content 12-18% → be about 12% → intersect in length and breadth the composition panel with the bamboo veneer with waterproof resin glue gluing → be dried to again moisture content at gluing machine, base plate and central layer → hot-forming.

The bamboo sheet making that consists of the utility model high-strength bamboo veneer board is as follows, at first that former bamboo is sawed-off according to Len req, and is even for guaranteeing the raw material quality, carries out Divisional, the sawed-off (see figure 1) of classifying. Afterwards sawed-off former bamboo is split into the wide former bamboo cane (see figure 2) of 15mm-30mm driving the bamboo machine, even in order to guarantee the bamboo plywood mechanical property, except strict with the classification processing of position when former bamboo is sawed-off, according to bamboo wood self structure and mechanics property analysis are learnt, the bamboo wall is slightd Huang by surf green, bamboo core and bamboo and is formed, its surf green density is big, hard, and mechanical property is good; The bamboo core takes second place, and tabasheer density minimum, intensity is low, and this is the Fundamentals that cause bamboo wood irregular. For guaranteeing material substance, with laminating machine Outer part and inner part of the bamboo is separated by laminating machine, surf green is in order to process bamboo mat or handicraft, tabasheer can be processed into the lower tabasheer glued board of quality, and adopt in the utility model through laminating machine tell by the relatively uniform bamboo chip (see figure 3) of the thick 1-5mm that consists of of bamboo core of quality. Owing to exist the bamboo cane width difference that ring and former bamboo self-sow produce through bamboo cane sawed-off, after cuing open bamboo and layering, need bamboo cane is processed through trimmer, become the bamboo cane (see figure 4) of wide uniform thickness. The bamboo chip that draws by above-mentioned layering trimming basically thickness, directly degree equates with width. Then the bamboo chip with satisfactory wide uniform thickness is combined into bamboo veneer (see figure 5) with nylon wire braiding well-thought-out plan veneer or with adhesive tape hot-press solidifying on plate joggling apparatus on special-purpose braider, because width, the thickness of bamboo chip are identical, straight degree difference is littler, by the mechanism of braider or plate joggling apparatus, the slit is reduced in the scope that GB allows (less than 1.5mm). Then with the bamboo veneer drying to moisture content 12-18%, use the gluing machine gluing, can be the phenolic resins marine glue at the adhesive of this employing, also can adopt neoprene resin marine glue, or other The higher resin marine glue of conventional water resistance, and in used adhesive, mix 3.5kg/cm according to the requirement for anticorrosion of international freight forwarding container bottom board³Bei Xilemu, Rui Dalemu, the antiseptic insect-resistant agents such as Rui Dasong (reaching the supply of material of template company or Qingdao Jinyuan Co. by Qingdao is auspicious), its phoxin residual volume is for being not less than 0.7kg/m³ The utility model can adopt two-sided gluing to the bamboo veneer, and its glue consumption is 110-140kg/m³(solids content of glue is 50%), its glue consumption is 80-100kg/m during the single face gluing³ It is about 12% that bamboo veneer after the gluing is dried to moisture content again. So, just generated basic building block of the present utility model-bamboo veneer.

Below with reference to Fig. 6 further specify the bamboo veneer how assembly become container bottom board. Wherein, container bottom board is by panel 1, base plate 2, and central layer 3, marine glue mixture 4 and coating consist of. Panel 1 and base plate 2 are vertically veneer of list, are the rigidity of raising bamboo plywood, thereby reduce stressed rear distortion, also can adopt two vertically bamboo veneers, or use pressure greater than 40kg/cm at hot press earlier with two layers of vertical veneer or with vertical veneer more than two layers²The high compression ratio bamboo veneer that is processed into. The some layers of central layer 3 usefulness are mated formation to bamboo veneer intersection in length and breadth and are formed, and also available bamboo chip plates or other plant fiber veneer form. Scribble marine glue mixture 4 in each bamboo veneer phase cross surface. Container bottom board is 140 ℃～170 ℃ in temperature behind the assembly, and pressure is 20-40kg/cm², compression ratio is hot-forming under the condition of 1:1.15～1:1.5. For guaranteeing the strict demand of container bottom board waterproof, its surface namely scribbles phenolic resins base plate coating or glass fibre reinforced plastic coating at the outer surface of panel 1 and base plate 2.

Adopt the made container bottom board of said method after measured its physical and mechanical property be: absolute drift＜10%, proportion are 0.8-0.85kg/cm³, bonding strength〉and 2.5MPa, vertically MOR〉80MPa, bending strength〉40MPa, longitudinal modulus of elasticity〉10000MPa, transverse modulus of elasticity〉4000MPa, meet the technical indicator that international standard is stipulated fully. The actual loading test base plate hangs and rises intensity, adopted hole is hung and risen intensity, and the base plate strength test meets the international standard set quota fully.

Embodiment 1:

13 layers of multiple bamboo plys of the utility model bamboo plywood used for bottom plate of container, panel and base plate are two vertically bamboo veneers, and hot pressing temperature is 150 ℃, and with the two-sided gluing of phenolic resin glue, its glue consumption is 100kg/m ³, hot pressing pressure is 20kg/cm ²The time

Density 0.72 compression ratio 1:1.15

Horizontal 41 MPa of vertical 80 MPa of MOR

Horizontal 4050 MPa of vertical 10100 MPa of elastic modelling quantity.

Embodiment 2:

Its condition is identical with embodiment 1, and hot pressing pressure is 32kg/cm ²The time

Density 0.80 compression ratio 1:1.25

Horizontal 62 MPa of vertical 107 MPa of MOR

Horizontal 6100 MPa of vertical 11500 MPa of elastic modelling quantity.

Embodiment 3:

Its condition is identical with embodiment 1, and hot pressing pressure is 40kg/cm ²The time

Density 0.85 compression ratio 1:1.5

Horizontal 81 MPa of vertical 160 MPa of MOR

Horizontal 7000 MPa of vertical 11700 MPa of elastic modelling quantity.

Embodiment 4

15 layers of multiple bamboo plys of the utility model bamboo plywood used for bottom plate of container, panel and base plate are two vertically bamboo veneers, and hot pressing temperature is 150 ℃, and hot pressing pressure is 32kg/cm ², with the two-sided gluing of phenolic resin glue, its glue consumption is 110kg/cm ³The time

Density 0.81 compression ratio 1:1.26

Horizontal 65 MPa of vertical 109 MPa of MOR

Horizontal 6300 MPa of vertical 11700 MPa of elastic modelling quantity

Bonding strength 2.7 MPa

Embodiment 5

15 layers of multiple bamboo plys of the utility model bamboo plywood used for bottom plate of container, panel and base plate are two vertically bamboo veneers, and hot pressing temperature is 150 ℃, and hot pressing pressure is 32kg/cm ², with the two-sided gluing of phenolic resin glue, its glue consumption is 110kg/m ³, the anticorrisive agent consumption is 3.5kg/m ³The time

Density 0.83 compression ratio 1:1.27

Horizontal 67 MPa of vertical 111 MPa of MOR

Horizontal 6500 MPa of vertical 12100 MPa of elastic modelling quantity

Bonding strength 2.9MPa good fortune gram Lyceum (phoxin) residual quantity 0.78kg/cm ³

Claims

1, a kind of bamboo plywood, form by panel, base plate and central layer, it is characterized in that: panel and base plate are made up of the bamboo veneer that wide uniform thickness bamboo chip constitutes, central layer is made up of the longitudinal and transverse intersection of bamboo veneer of different-thickness, scribble moisture-proof adhesive on the bamboo veneer phase cross surface, the width of bamboo chip is 1.5～3.0mm, and thickness is 1～5mm, scribbles coating on base plate and the panel surface.

According to the described bamboo plywood of claim 1, it is characterized in that 2, the bamboo veneer is that described bamboo chip wide, uniform thickness is formed through the nylon wire braiding.

According to the described bamboo plywood of claim 1, it is characterized in that 3, panel and base plate are single vertically bamboo veneer.

According to the described bamboo plywood of claim 1, it is characterized in that 4, panel and base plate are two vertically bamboo veneers.

According to the described bamboo plywood of claim 1, it is characterized in that 5, panel and base plate are the vertical bamboo veneer of high compression ratio.

6, according to the described bamboo plywood of claim 1, it is characterized in that, on panel and backplate surface, scribble phenolic resin coating.

7, according to the described bamboo plywood of claim 1, it is characterized in that, on panel and backplate surface, scribble glass fibre reinforced plastic coating.

According to the described bamboo plywood of claim 1, it is characterized in that 8, central layer is bamboo bits veneers.

According to the described bamboo plywood of claim 1, it is characterized in that 9, central layer is the string veneer.