CN2430260Y

CN2430260Y - Composite veneer with electromagnetic shielding effection

Info

Publication number: CN2430260Y
Application number: CN 00236140
Authority: CN
Inventors: 朱家琪; 罗朝晖; 黄泽恩
Original assignee: Research Institute of Wood Industry of Chinese Academy of Forestry
Current assignee: Research Institute of Wood Industry of Chinese Academy of Forestry
Priority date: 2000-06-02
Filing date: 2000-06-02
Publication date: 2001-05-16
Anticipated expiration: 2010-06-02

Abstract

The utility model relates to plywood, particularly a plate used by electrical equipment and machinery rooms. The utility model comprises an upper wood single plate, a middle wood single plate and a lower wood single plate, wherein, the lower surface of the upper wood single plate, the upper surface and the lower surface of the middle wood single plate, and the upper surface of the lower wood single plate are respectively coated with an adhesive layer, metal flat nets are respectively arranged between the two adhesive layers of the upper wood single plate and the middle wood single plate and between the two adhesive layers of the middle wood single plate and the lower wood single plate, and the size of each metal flat net is more than 20 meshes. Consequently, the utility model has the advantages that the electromagnetic shielding effect is enhanced, the plate density is decreased, the adhesive-joint can be carried out easily, and a good hand feeling is offered.

Description

Composite plywood with electromagnet shield effect

The utility model relates to a kind of glued board, especially refers to the plate that electronic and electrical equipment and machine room are used.

At present, the common electrical magnetic shielding material is the general direct employing metal material of electric conductor.Owing to wood materials is the necessary and metal composite of insulating materials basically, just can have electromagnet shield effect.Method is nearly: form the metal nickel dam on the wood chip surface, applying glue again, moulding, and compacting has the particieboard of electromagnet shield effect, at 30-500MHz frequency range inner shield usefulness＞30dB, still, manufacturing process is complicated, the density of sheet material is also bigger, and splicing is also difficult between metal and the natural fiber material, and in addition, product also loses the outward appearance and the feel of wood materials.

The purpose of this utility model provides a kind of composite plywood with electromagnet shield effect in view of this, and it is a difference coating binder between the multilayer Wooden veneer, and inserts and puts wire netting, forms the glued board of electromagnetic shielding.

The purpose of this utility model is achieved in that and comprises that wood single-plate, middle wood single-plate reach wood single-plate down, reaching down on last wood single-plate lower surface, the upper and lower surface of middle wood single-plate, the wood single-plate upper surface all is coated with one deck adhesive layer, again between two adhesive layers of last, middle wood single-plate and in, between two adhesive layers of wood single-plate a metal plain net is set respectively down, the width of mesh of this metal plain net is more than 20 orders.

The width of mesh of described metal plain net is between the 40-60 order.

Wood single-plate inserts and puts a metal plain net between at interval polylith and per two in described.

Owing to adopt such scheme: electromagnet shield effect improves, and panel density also reduces, and glueds joint also easily, and feel is not bad in addition.

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is the utility model exemplary embodiments schematic diagram.

Among the figure: 1, go up wood single-plate; 2, adhesive layer; 3, metal plain net; 4, middle wood single-plate; 5, following wood single-plate.

Present embodiment comprises on one wood single-plate 1, four layers of adhesive layer 2, two metal plain nets 3, wood single-plate 4 reaches wood single-plate 5 in one, as shown in Figure 1, wherein: wood single-plate 5 was all the flat board that natural timber is made under upward wood single-plate 1, middle wood single-plate 4 reached, belong to prior art, wherein middle wood single-plate 4 also can be the polylith that separates, and inserts and puts a metal plain net (3) between per two.

Adhesive layer 2 is urea-formaldehyde resin adhesive or cyanurotriamide modified urea resin adhesive or phenolic resin adhesive or resorcinol-phenol-formaldehyde resin adhesive or isocyanate adhesive; Be coated on the upper and lower surface of wood single-plate 1 lower surface, middle wood single-plate 4, the upper surface of following wood single-plate 5, strengthen mutual bonding property.

The width of mesh of metal plain net 3 is advisable with the 40-60 order more than 20 orders, and with hot pressing mode, hot pressing is between the adhesive layer 2 of upper, middle and lower wood single-plate 1,4,5; This metal plain net 3 can be copper mesh, iron net, nickel screen and stainless (steel) wire, is best with the stainless (steel) wire, can be to electromagnetic wave shielding.

In sum, glued board of the present utility model, in the 1-1000MHz frequency range, electromagnet shield effect reaches 30-80dB.

Claims

1, a kind of composite plywood with electromagnet shield effect, comprise that wood single-plate (1), middle wood single-plate (4) reach wood single-plate (5) down, it is characterized in that: reaching down on last wood single-plate (1) lower surface, the upper and lower surface of middle wood single-plate (4), wood single-plate (5) upper surface all is coated with one deck adhesive layer (2), again between two adhesive layers (2) of last, middle wood single-plate (1), (4) and in, down between two adhesive layers (2) of wood single-plate (4), (5) a metal plain net (3) is set respectively, the width of mesh of this metal plain net (3) is more than 20 orders.

2, by the described composite plywood with electromagnet shield effect of claim 1, it is characterized in that: the width of mesh of described metal plain net (3) is between the 40-60 order.

3, by the described composite plywood with electromagnet shield effect of claim 1, it is characterized in that: wood single-plate (4) inserts and puts a metal plain net (3) between at interval polylith and per two in described.