JPH04307233A - Manufacturing method of composite damping metal plate - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] The present invention relates to a method for dispersing a conductive filler in a resin of a vibration-damping metal plate, and more particularly to a method for uniformly dispersing a conductive filler in a resin of a weldable resin composite vibration-damping metal plate. .

0002

[Prior Art] A weldable damping metal plate (hereinafter referred to as a "damping steel plate" as a representative of the damping metal plate) is made by containing a conductive filler in the resin of the intermediate layer. There is. In particular, as a method for dispersing a conductive filler into a solution type resin for damping steel plates, as shown in JP-A-1-145142, the resin and filler are stirred in a stirring tank, and then this mixture is applied to a metal strip using a coating roll. There is a known method of coating the surface of the metal strip, such as the method disclosed in JP-A No. 63-227331, in which resin containing metal powder is supplied from a hopper and coated on the surface of the metal strip with a coating roll via a pick-up roll. ing.

0003

[Problems to be Solved by the Invention] However, in all of these conventional techniques, when filler is dispersed in resin, the filler settles due to differences in specific gravity, etc., so it is necessary to improve the poor dispersion caused by this by physical means. However, the purpose of the present invention is to prevent the conductive filler from settling even if a conventional coater is used as is, and to enable uniform dispersion and application of the conductive filler.

0004

[Means for Solving the Problem] For this purpose, the present invention applies a solvent-free vibration damping resin mixed with a conductive filler to the bonding surface of at least one of two steel plates, and after drying, In the method for manufacturing a resin composite damping metal plate in which these two metal plates are bonded together, at least one bonding surface of the two metal plates to be bonded is coated with hydrogenated castor oil, fatty acid amide wax, and a conductive filler. The method is characterized in that these two metal plates are bonded together after applying a solvent-free damping resin mixed with one or more types of anti-settling agents.

[0005]

[Function] According to the present invention, since an anti-settling agent is mixed with a conductive filler into the resin to be applied,
There is no sedimentation of filler, and it can be applied evenly with a regular coater.

[0006]

[Example] Examples of the present invention will be explained based on experimental results. The steel sheet used as the test material was a chromate-treated general-purpose cold rolled steel sheet (JIS, SPCC equivalent) 0.8 mm thick, two types of resin were polybutadiene and epoxy resin with low Tg (glass transition temperature), and an anti-settling agent. is 4 shown in Table 1.
Ni powder with an average particle size of 65 μm was used as a seed and conductive filler.

[0007]

[Table 1]

First, the anti-settling agents shown in Table 1 are mixed and dispersed in a resin. Powdered anti-settling agents such as hydrogenated castor oil and fatty acid amide wax were mixed into the heated resin and heated and mixed and dispersed using a disperser. Next, a conductive filler was added to this solution in an amount of 2% by volume based on the non-volatile content, and then applied to a steel plate using a roll coater. The resin thickness is 40 μm. The steel plates coated with the resin were heated at 80°C for 3 minutes in a drying oven and bonded together using a heated roll at 200°C, after which various performance tests as shown in Table 2 were conducted.

[0009]

[Table 2]

The test results are shown in Table 3 for those using polybutadiene as the resin, and in Table 4 for those using epoxy resin. In all cases, it can be seen that as a result of the present invention, vibration damping steel plates with uniform filler distribution and good quality were obtained.

[0011]

[Table 3]

0012

[Table 4]

[0013] In the above experiments, one or two types of organic anti-settling agents were used, but in actual operation, an inorganic anti-settling agent such as silica or acetylene black may be added to these. is also valid. In addition, although only one type of steel plate and one type of conductive filler were used in the experiment, the metal plates of the present invention include general cold-rolled steel plates, various plated steel plates, surface-treated steel plates such as phosphate-treated steel plates, stainless steel, and aluminum. , metal plates such as copper can be applied. It goes without saying that metal powders such as stainless steel, zinc, tin, brass, etc. and plated fillers can also be used as conductive fillers.

[0014]

[Effects of the Invention] According to the present invention, the conductive filler is uniformly mixed into the resin which is the core material of the vibration damping steel plate, and the quality such as adhesive strength and weldability of the resin composite vibration damping steel plate can be stabilized.

Claims (2)

[Claims] Claim 1: A resin composite molding method in which a solvent-free vibration damping resin mixed with a conductive filler is applied to at least one bonding surface of two metal plates, and after drying, these two metal plates are bonded together. In a method for manufacturing a vibrating metal plate, a solvent-free vibration damping resin containing a conductive filler and one or more anti-settling agents is applied to at least one bonding surface of two metal plates to be bonded together. after,
A method for manufacturing a composite vibration-damping metal plate characterized by bonding these two metal plates together. 2. The method for producing a composite vibration damping metal plate according to claim 1, wherein the anti-settling agent is hydrogenated castor oil and/or fatty acid amide wax.