JPS5973945A - Laminated rubber structure for vibration damping steel 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 The present invention relates to a laminated rubber structure for vibration-damping steel plates, and more specifically, a laminated rubber structure with thermal adhesive films pasted on both sides is sandwiched between two steel plates, and then The present invention relates to a laminated column structure for damping steel plates in which a steel plate and an Ill''H column are bonded and integrated by heating and pressurizing.

In the past, adhesive type resin-based distribution layers were often used as vibration-damping steel plates, which also served as adhesives. The increase in atmospheric temperature ((therefore, flf
! The problem is that the first vibration layer softens and the steel plates peel off from each other;
there were.

In addition, there are many types in which a rubber-based or resin-based vibration damping sheet is sandwiched between a steel plate and attached with an adhesive, and relatively few vibration-damping performance regulators exist in Europe. However, there was a problem in that the pasting process required a lot of manpower.

In view of the circumstances mentioned in Section L, the present inventors have conducted research on vibration-damping steel plates that have a small temperature dependence and can be easily processed without requiring a large amount of labor for pasting. As a result, by using a comb-based damping material and pasting a thermal adhesive film on both sides, it is possible to obtain a vibration-damping steel plate that can be efficiently bonded to a steel plate and has excellent damping ability. This led to the present invention. Accordingly, the present invention provides a laminated rubber structure in which a thermal adhesive film is pasted on both sides of a sheet-like damping rubber.

For the sheet-form rubber, 100 parts by weight of a mixture of acrylonitrile-butadiene copolymer (NB11.) and vinyl chloride resin or vinyl chloride copolymer, a total of 15 to 50 parts by weight of coumaron resin, and other fillers and plasticizers. A rubber composition consisting of:

This damping rubber-thermal bonding laminate is bonded between two steel plates, and then heated and pressurized to bond the damping rubber and the steel plate in a short time, without using conventional adhesives. Compared to the conventional bonding method, it is possible to supply continuous laminated sheets (,C) using a calendar, etc., and it can be bonded and laminated with steel plates by heating halo pressure between two steel plates, making it possible to significantly increase the adhesive strength. The process can be improved.

NBI (vinyl chloride resin, vinyl chloride copolymer, etc.) is known to have a high loss coefficient in warm surroundings, but NBR
A mixture of A and vinyl chloride resin expands the transition region especially near the active part A and exhibits a high loss coefficient. This Nl31? .

The preferred composition ratio of NBJ and vinyl chloride resin is NBJ:t5
~95 parts by weight, and 95 to 5 parts by weight of vinyl chloride resin.

However, simply adding a filler and a plasticizer to a mixture of the two does not show a sufficiently high loss coefficient over a wide temperature range as a distribution material for a distribution steel plate. To 100 parts by weight of this mixture of NBR and vinyl chloride resin, 15 to 50 parts by weight of a coumaron-based resin with a softening point of 80° C. or higher is added, and the composition D glass transition point is added. By setting the temperature to -20°C or higher, a high loss coefficient can be obtained over a very wide temperature range around room temperature.

The heat-adhesive film to be pasted on both sides of the vibration-damping rubber sheet may be of the hot-melt type, heat-activated type, thermosetting type, etc., but when considering short-term adhesion, hot-melt films such as EVA can be used. Preferably the type
It is preferable to use a VCd thermosetting type material that has strength at extremely high temperatures.1 It is usually heated and pressurized at a temperature of about 120 to 200°C.

It is preferable to bond the side dam rubber and the thermal adhesive film together in advance to form a laminate. However, when producing the split rubber, if the thermal adhesive film is used as a liner and laminated during calender rolling, the control unit itself By using the adhesive properties of 2, it easily sticks to the thermal adhesive film and forms an integrated laminate (
・It is possible to form C, and workability in bonding process can be greatly improved.

Next, the present invention will be specifically explained with reference to Examples.

Examples 1-5. Comparative Examples 1 to 3 Steel plate as vibration damping steel plate / thermal adhesive film pasted on both sides Examples of vibration damping rubber/steel plate = 3.2 / 0.6 / 3.2 Thickness, resin compounding amount shown in the following table was changed Uses damping rubber.

In addition, 50 parts of DOPIO part 5, 7 parts of calcium carbonate, and 50 parts of clay were blended.

The results of measuring the temperature dependence of the loss coefficient at 500I (Z) for the damping steel plate obtained from this damping rubber are shown in Figure 2. This shows that the measurement plate is excellent at damping vibrations.

[Brief explanation of drawings]

Figure 1 is a cross-sectional view of the laminated rubber structure of the present invention.
Figure 2 shows the loss coefficient of various damping steel plates at 50oHz? It is a graph showing l+71 degree dependence. 1. Sheet-shaped rubber 2. Thermal bonding film Patent applicant: Pritchstone Tire Co., Ltd. Patent attorney Akira Ito

Claims (3)

[Claims] (1) Laminated rubber structure for damping steel plate characterized by having thermal adhesive film attached to both sides of sheet-like damping rubber (2) To 100 parts by weight of a mixture of acrylonitrile-butadiene rubber and vinyl chloride resin or vinyl chloride copolymer, add 15 to 50 parts by weight of chroman resin, a filler, and a plasticizer. A laminated rubber structure for a distributed steel plate according to claim (1), which is a rubber composition with added (3) The heat-adhesive film is made of a thermoplastic resin with a heat deformation temperature of 120 to 200°C (1)
) Laminated comb structure for damping steel plates as described in item