JPS6233888A - Flexible composite material - Google Patents

Abstract

PURPOSE:To obtain a composite material having large face density, improved flexibility and improved molding and processing properties, by using vinyl chloride resin or rubber as a binder, blending it with a filler obtained by subjecting previously specific inorganic particles to surface treatment with metallic soap, kneading and molding the blend. CONSTITUTION:100pts.wt. vinyl chloride resin or rubber as a binder is blended with 200-1,700pts.wt. inorganic particles comprising one or more selected from metals such as lead, copper, iron or nickel, metal oxides, carbon, graphite, etc., as a main component, which is subjected to surface treatment with an organic acid salt (metallic soap) of cobalt, lead, zirconium, copper or zinc before blending both the components and 5-30wt% based on the inorganic particles of silica particlers, as a filler, kneaded and molded to give a composite material having improved flexibility and sound proofing properties.

Description

[Detailed description of the invention] Strings! TECHNICAL FIELD The present invention relates to a composite material that is excellent in flexibility, soundproofing properties, and workability, and is a composite material that can be used in many fields such as sound insulating material, sound absorbing material, electromagnetic shielding material, and vibration isolating material.

Various types of sound insulating materials are known to prevent external noise from entering or radiating to the outside, and sound absorbing materials that reduce sound reflection. It can be processed into a sheet and laid on the floors and walls of automobiles, railway vehicles, and buildings, adhered to uneven or curved surfaces, and used for OA.
For use as a composite agent for equipment case materials, steel plates, and nonwoven fabrics, it is required to be as thin a sheet as possible, have a high areal density, have good flexibility, and have good moldability. . The price is low for this purpose.

The material's ease of handling and resistance to deterioration are also important. In order to improve the sound insulation effect, it is important to make the area density as low as possible, and for this purpose, it is important to fill as much high-density filler as possible. However, inorganic particles generally have a poor affinity for binders, and a large amount of filling is required.

Therefore, an appropriate combination of binder and filler is important. That is, the affinity of the binder and the filler is related to each other, and an inappropriate combination will result in poor mechanical strength of the product, occurrence of out-of-play phenomenon during molding, and deterioration of the surface finish of the product.

Recently, a soundproofing material that combines vinyl chloride resin containing plasticizer with iron oxide, which is a by-product of the steel manufacturing process, has been developed in Japanese Patent Application Laid-Open No. 57-34.
It is disclosed in the No. 064 publication. Although this oxide is said to have excellent adhesive properties with vinyl chloride, it is difficult to peel off from the roll surface during molding, the gelation time is long, and the mechanical properties such as bending of the resulting sheet are not sufficient. I can not say. Further, Japanese Patent Application Laid-open No. 78742/1983 discloses a means of using metal powder on which an oxide film or a phosphoric acid film has been formed. In general, lead and copper have poor affinity with organic materials.
Cracks and cuts easily occur due to bending stress.

Flexible sound insulating materials can not only be placed closely on curved surfaces, but also exhibit vibration absorption and sound insulating effects without resonance.

For this purpose, it is necessary to have a low bending elastic modulus and the ability to withstand bending.

杢”mouth W is 31 (ν洟’l　,!:tl:艷厭子.

The inventor of the present invention has repeatedly conducted research into manufacturing composite materials with excellent flexibility and high areal density for use in the above-mentioned applications with good processability, and found that by pre-surface-treating inorganic particles with metal soap, The present invention was completed based on the knowledge that it is possible to increase the fillability of the filler and has extremely high bending strength, and is completely compatible with all of the above objectives. In a sound insulating material that is kneaded and molded using vinyl resin or rubber as a binder and inorganic particles as a filler, the filler is preliminarily mixed with cobalt, lead,
A flexible composite material characterized by using a surface treated with at least one or two or more selected from metal soaps of zirconium, copper, and zinc, and the second feature is that the inorganic particles and silica particles The point is to use them together.

The details will be explained in more detail below.

The basic components of the sound insulation material of the present invention are vinyl chloride and/or rubber and inorganic particles. Functionally, the former is called a binder, and the latter is called a filler.

The inorganic particle filler used in the present invention preferably has a large bulk specific gravity from the viewpoint of areal density, particularly for sound insulation and sound absorption properties, and preferably has electrical conductivity from the viewpoint of electromagnetic shielding property. Specifically, metals such as lead, copper, iron, and nickel, fine particles of their oxides, composite powders of lead plated with copper, carbon, graphite powders, or composite powder particles of these metals plated with copper are applicable. These may be used not only as a single component but also as multiple components. In particular, to improve sound insulation properties, it is preferable to use metal particles such as lead or copper, or iron oxide as a main component. In order to exhibit an electromagnetic shielding effect, it is preferable to use conductive particles. Lead has a large ratio 7R and is advantageous in preventing black corrosion. Copper-plated composite powder is
This is preferable because it improves conductivity. The inorganic particles may be in any of the shapes of spheres, scales, and fibers, and it is effective to use fine particles with a mesh size of 100, preferably 200 mesh.

In addition to the inorganic particles, when silica or a silica-containing component is used as a second filler, the affinity of the inorganic particles with the binder is further improved, and the amount that can be filled can be increased. About 5 to 5 silica particles per 100 parts by weight of the inorganic particles
:3011 [parts] is preferably used. As a silica source, 5in2. Aluminosilicate, nFeo-8iOz
tnFe0-Fe2O3.SiO2 (n=1-3), etc. can be used. On the other hand, it is not preferable to use an alkali or alkaline earth metal oxide as a filler component because it reduces moldability, so it is desirable to limit the amount to about 10 wt% or less. When iron oxide is used as inorganic particles, iron concentrate slag produced as a by-product in the non-ferrous smelting process and converter slab produced in the iron manufacturing process are economical and compatible with binders.

In particular, the former iron concentrate slag has a main component of 2FeO-8i
O7 and Fe, 04, containing 60 to 90 wt% iron oxide,
It is particularly suitable since it contains 10 to 30 wt% of the silica component.

The inorganic particles are surface-treated with metal soap in advance. The soap used in the present invention contains cobalt, lead, zirconium, copper,
It is any organic acid salt of lead. Organic acids include fatty acids having 5 to 15 carbon atoms, unsaturated fatty acids, and naphthenic acid.

For example, hexanoic acid, 2-ethylhexanoic acid, palmitic acid, stearic acid, octylic acid, hexadecanoic acid, 1-
- oil fatty acids and dimer acids are exemplified. calcium,
Organic acid salts of cadmium and zinc are known as stabilizers for vinyl chloride, but as in the present invention, they are composite materials,
It is a novel concept to pre-surface-treat the filler.

Before mixing the inorganic particles with the binder, the soap is adsorbed in advance. Approximately 0.02 to 5 parts by weight of the soap metal may be added per 100 parts by weight of the inorganic particles and dried. When adding it, it is best to dilute it with petroleum extract, aromatic solvent, mineral turpentine, etc., and then spray or soak it. There is no need for surface treatment of the second filler, silica, which has only a small effect when added after mixing or into the binder.

The inorganic particles are mixed with vinyl chloride resin or rubber. The above-mentioned surface-treated filler has a very good affinity with these binders, and even if a large amount of filler is filled into a small amount of binder, flexibility and good bending resistance can be maintained. Polyvinyl chloride as vinyl chloride resin.

A copolymer of vinyl chloride and vinyl acetate can be used.

Add plasticizers and stabilizers during use. Covering materials recovered from waste cables, used agricultural and agricultural vinyl chloride sheets, etc. can also be preferably used. Further, the rubber may be either natural rubber or synthetic rubber. Waste tires are one preferred binder.

Filler 200-170 per 100 binders
They are mixed in a proportion of 0 parts by weight.

In order to produce the flexible sound insulation material of the present invention, a plasticizer is added to the binder, and if necessary, an appropriate amount of a stabilizer such as metal soap is added to the binder, and a pretreated filler is mixed with the binder.
The mixture is heated to about 150°C, stirred, and thoroughly kneaded using a mixing roll or the like. Since the sound insulating material of the present invention is used in the form of a sheet, it can be finished to a thickness of about 0.5 to 10 mm using a calendar molding machine or an extrusion molding machine.

The sheet can be used as it is or by pasting it onto a steel plate, nonwoven fabric, or the like.

The following will be explained based on examples.

Examples 1, 2.3 Vinyl chloride resin 100 Jushabu, D○P6 as plasticizer
Compound 1 with a proportion of 0 parts by weight and 5 parts of tin-based stabilizer
To 64 parts by weight, 600 parts by weight of each of the following fillers were mixed and kneaded. A 2 m thick sheet was produced using two 8 inch x 20 inch rolls. Table 1 shows the evaluation results of processability and product performance.

Filler F-1: Iron concentrate slag produced as a by-product in the copper smelting process (composition: iron oxide 72 wt%, silica 20 wt%, alumina 1.5
wt%, moisture 2wt%, balance metal steel, draw marks ()) F 2 ; Compound M: n'J-1 (50 parts by weight) and 'electrolytic copper powder (
50,! 1 (Okibe) Pretreatment of filler mixture 2-Ethylhexanoate cobalt soap mineral turpentine solution (Go content; 10%) was added to filler 1001flj
The mixture was sprinkled at a rate of 0.5 parts of CO per t part, stirred, and then dried at 120°C.

For comparison, a sample without pretreatment Jll was also used.

(Leaving space below) Table 1 Processability and product evaluation results sheet areal density tensile strength bending resistance Note 1)^^AAA AA AA
B Note 1) AAA; No cracking even after bending 100 times or more at 180 degrees ; No cracking even when bending 50 times or more at 180 degrees A; Small cracks occur after bending 20 to 50 times +3; Large cracks occur after 20 to 30 bends C; Cut after 5 or less bends As shown in Table 1, comparison between Example 1, Comparative Example 1, and Example 2.
The filler composition of bite elf 2 is the same, but
Differences in tensile strength and bending resistance were observed with and without pretreatment (1).

'Jj/7ffifJ'l14.5 Comparison fs4.5
Using the fillers used in Examples 1 to 3, pretreatment gold 1, J (copper stearate (Ster, abbreviated as Cu) and naphthenic zirconium (Naph, abbreviated as Zr) as soap, A sheet was manufactured according to the formulation shown in Table 2. (Hereinafter blank) Table 2 Metal soap used Example 6. Reference example Comparing the processability and product performance of the case (example) and the case where Kono (ruto soap) is mixed in the binder and filled with filler (reference example), the third
Shown in the table.

(2) Growth left side Filler F-1 used in Example 1, 0.2 parts by weight of the cobalt soap used in the 100-year-old metropolitan area, was mixed as a cobalt component, and the surface was treated by thoroughly mixing and drying. 600 parts by weight of the filler was blended with 100 parts by weight of vinyl chloride resin, and oopso parts by weight as a plasticizer were blended and kneaded to prepare a sheet.

Kan 4 wholesale friend vinyl chloride resin 1.00! A compound was prepared in which 50 parts by weight of D OP as a plasticizer and 0.2 parts by weight of cobalt soap were blended as a cobalt content per part of if.

The filler F-1 per 150 parts by weight of the compound
The mixture was combined into 600-weight plates and kneaded to produce a sheet.

The results for both methods are shown in Table 4.

Table 4 Example 6 Reference example Areal density (Kg/+”) 5.1 5.1 Plate out None Slightly generated tensile strength (fish/m”) 42.5 38 Bending resistance A
AA AA receipt surface smooth, rough, smooth, glossy, glossy, no light translation No. 4
As seen in the table, when the filler is treated with metal soap in advance, the adhesive force between the filler and the binder increases, and as a result, the plate-out phenomenon does not occur even when the filler is filled with large amounts of filler. It is clear that the mechanical strength of Sea 1- is also increased.

Effects of the present invention Although the composite material of the present invention has very strong adhesion between the binder and inorganic particles and has a high areal density, the resulting sheet-like product does not crack when bent or is processed during molding. The play 1 out phenomenon that sometimes occurs does not occur, and the thin sea 1 has a great soundproofing and electromagnetic wave prevention effect.

Claims (8)

[Claims] (1) In a composite material in which vinyl chloride resin or rubber is used as a binder and inorganic particles are mixed as a filler and then kneaded and molded, the inorganic particles are preliminarily mixed with metals such as cobalt, lead, zirconium, copper, and zinc before mixing the two. A flexible composite material, characterized in that it is filled with a material whose surface has been treated with at least one or two or more selected from soaps. (2) A patent in which the inorganic particles are mainly composed of one or more selected from the group consisting of lead, copper, iron, and nickel, metal oxides, carbon, graphite, and composite metal powder. A flexible composite material according to claim 1. (3) Inorganic particles include 30 to 90 wt% iron oxide and 5 silica
3. The flexible composite material according to claim 1, which has a composition of 30 wt%. (4) Metal soap in inorganic particles, 0.02 as metal component
The flexible composite material according to claims 1 to 3, wherein ~5 wt% of the inorganic component is supported on the surface of the inorganic component. (5) 200~200 parts of filler per 100 parts by weight of binder
Claim 1: 1700 parts by weight mixed, kneaded and molded
The flexible composite material according to items 4 to 4. (6) In a sound insulation material that is mixed, kneaded and molded with vinyl chloride resin or rubber as a binder and inorganic particles as a filler, the filler is made of metals such as cobalt, lead, zirconium, copper, and zinc before mixing the two. The surface is treated with at least one or two or more selected from soaps, and silica particles or silica-containing particles are used as a second filler in an amount of 5 to 30 wt relative to the inorganic particles.
% flexible composite material. (7) A patent in which the inorganic particles are mainly composed of one or more selected from the group consisting of lead, copper, iron, and nickel, metal oxides, carbon, graphite, and composite metal powder. A flexible composite material according to claim 6. (8) The flexible composite material according to claim 6 or 7, wherein the inorganic particles are iron concentrate slag produced in a copper smelting process.