CN205735349U - A kind of MULTILAYER COMPOSITE container bottom board - Google Patents

Abstract

The utility model relates to a multi-layer composite container bottom plate, which comprises an upper surface layer, an upper surface layer, a middle layer, a lower surface layer and a lower surface layer. One or both of the mixed flakes, the upper surface layer, the middle layer, and the lower surface layer are laid longitudinally, the upper surface layer and the lower surface layer are laid horizontally, and MDI is used between the flakes of each layer. Resin glue or phenolic resin glue bonding. The raw materials of the composite container bottom plate are cheap and easy-to-obtain bamboo and fast-growing poplar, which greatly reduces the production cost of the enterprise, improves production efficiency, and reduces the damage to the forest. The mechanical performance test results show that the bottom plate can fully meet the container use requirements.

Description

A multi-layer composite container bottom plate

technical field

The utility model relates to the technical field of containers, in particular to a multilayer composite container bottom plate.

Background technique

Traditional containers are usually composed of steel plates, paint, and a bottom plate (thick plywood) as a buffer and shockproof. The bottom plate of the container is often subjected to severe impact and extrusion during transportation, and must have good performances such as shock resistance, impact resistance, weather resistance, and aging resistance. Therefore, in addition to the appearance size, high requirements are put forward for the physical and mechanical properties of the plywood used for the container floor, such as durability, static bending strength, and elastic modulus.

In order to meet the requirements of good physical performance indicators, high-density hard broad-leaf materials are generally used as raw materials for container bottom plates. The growth cycle of this kind of tree species is long, generally about 100 years, but the needs of human beings are increasing day by day, resulting in a sharp decrease in hard broad-leaved wood resources worldwide, which cannot meet the increasingly developed container freight market. Bamboo and fast-growing poplar are rich in resources and widely distributed. If they are used to manufacture container floors, it can not only reduce the dependence on high-density hard broad-leaved materials, but also make full use of the abundant bamboo resources to reduce the production cost of enterprises.

Utility model content

The purpose of the utility model is to solve the problems existing in the prior art, and provide a container floor compositely produced by bamboo and wood shavings. The container floor has the advantages of stable quality, excellent comprehensive performance, high production efficiency and low cost.

A multi-layer composite container bottom plate, comprising an upper surface layer, an upper surface layer, an intermediate layer, a lower surface layer, and a lower surface layer, the upper surface layer is bamboo flakes, and the remaining layers are one of bamboo flakes and poplar flakes. species or mixed bamboo and wood shavings, two adjacent layers are paved vertically and horizontally alternately.

The upper surface layer, the middle layer and the lower surface layer are laid vertically, and the upper surface layer and the lower surface layer are laid horizontally.

Preferably, the upper surface layer is bamboo flakes sprayed with phenolic resin glue, and the rest of the layers are paved by mixing bamboo flakes and poplar flakes at a mass ratio of 1:1.

Each layer of shavings is bonded with MDI resin glue or phenolic resin glue.

The bamboo flakes and poplar flakes are 145-220mm long, 10-50mm wide and 0.5-0.9mm thick.

The multi-layer composite container bottom plate provided by the utility model adopts cheap and easy-to-obtain bamboo and fast-growing poplar materials and arranges them in a criss-cross pattern according to each layer, which greatly reduces the production cost, improves the production efficiency of the enterprise, and reduces the damage to the forest. The upper surface of the bamboo slices is sprayed with phenolic resin adhesive and then hot-pressed to form a transparent dark red wear-resistant layer, which does not need to use traditional impregnated paper. It is paint-free, wash-free, wear-resistant, and natural and beautiful. The difference in the arrangement of two adjacent layers significantly enhances the mechanical properties of the floor in all directions, and the multilayer structure is conducive to improving the strength of the composite floor.

Description of drawings

Fig. 1 is a structural schematic diagram of the container floor of the utility model.

detailed description

In order to enable those skilled in the art to fully understand the technical solutions and beneficial effects of the present utility model, further detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

Example 1

A kind of multi-layer composite container floor as shown in accompanying drawing 1, from bottom to top is successively lower surface layer 1, next surface layer 2, middle layer 3, last surface layer 4, upper surface layer 5. The lower surface layer 1, the middle layer 3, and the upper surface layer 5 are paved along the length direction (longitudinal direction) of the container floor by length 145-220mm, wide 10-50mm, and thick 0.5-0.9mm. The last surface layer 4 is formed by laying poplar planers of the same size along the width direction (transverse direction) of the container bottom plate. After applying MDI resin glue or phenolic resin glue to each layer of slices, pave them layer by layer, and spray a layer of phenolic resin glue on the surface of the upper surface layer 5 to form a transparent dark red wear-resistant layer after hot pressing.

The total thickness of the bottom plate of the multi-layer composite container is 28mm, the moisture content is below 10%, and the density is 0.78-0.9g/cm ³ . The mechanical performance test of the composite bottom plate found that its longitudinal static bending strength is 87-120MPa, its longitudinal elastic modulus is 10600-136000MPa, its transverse static bending strength is 36-48MPa, and its transverse elastic modulus is 3620-4650MPa, far exceeding the container The national standard requirements of the bottom plate can fully meet the requirements of use.

Example 2

A multi-layer composite container bottom plate comprises a lower surface layer 1, a lower surface layer 2, an intermediate layer 3, an upper surface layer 4 and an upper surface layer 5 from bottom to top. The lower surface layer 1, the next surface layer 2, the middle layer 3, and the last surface layer 4 are all mixed with bamboo flakes with a length of 180mm, a width of 20-40mm, and a thickness of 0.5-0.9mm and poplar flakes in a mass ratio of 1:1. It is paved after uniformity, wherein the lower surface layer 1 and the middle layer 3 are paved along the longitudinal direction, and the next surface layer 2 and the upper surface layer 4 are paved along the horizontal direction. The upper surface layer 5 is paved longitudinally by bamboo shavings of the same size, and the surface of the upper surface layer 5 is sprayed with a layer of phenolic resin adhesive and hot-pressed to form a transparent dark red wear-resistant layer. MDI resin glue or phenolic resin glue is still applied between each layer of shavings and paved layer by layer.

The bottom plate of the multi-layer composite container has a thickness of 28mm, a moisture content of 6.3%, a density of 0.79g/cm ³ , a longitudinal static bending strength of 89MPa, a longitudinal elastic modulus of 10850MPa, a transverse static bending strength of 52MPa, and a transverse elastic modulus of 5130MPa.

Claims (1)

1. a MULTILAYER COMPOSITE container bottom board, it is characterized in that including bamboo flaking upper epidermis, poplar flaking top layer last time, bamboo flaking intermediate layer, poplar flaking top layer next time, bamboo flaking layer, described bamboo flaking upper epidermis, bamboo flaking intermediate layer, bamboo flaking layer use and longitudinally mat formation, described poplar flaking top layer last time, poplar flaking top layer next time use laterally mats formation, MDI resin glue or phenolic resin glue bond, wherein bamboo flaking, the long 145-220mm of poplar flaking, wide 10-50mm, thick 0.5-0.9mm is used between each layer flaking.