M.WATANABE & CO., LTD.
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Electronics & Others
Machinable Ceramic
Micalex
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MICALEX is an insulating material made by heating and compression-molding the mixture of natural or synthetic mica with glass powder. MICALEX is a precision machinable ceramic material, being excellent in stability in dimensions, heat resistance, electric insulasion, etc. MICALEX has long-standing sales records and is available in low cost.
Characteristics
  • Excellent electrical properties, especially in high frequencies
  • Arc resistant
  • Mechanically strong
  • Easily machinable
  • Stable in dimensions and shape
  • Thermal resistant
  • Water, oil and weather resistant
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Ceramic Fiber Products
Ceramic Fiber
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Characteristics
  • Thermal resistant
  • Good at heat insulation
  • Light in weight and least regenerative.
  • Strong against rapid heating and rapid cooling
  • Good at sound absorption.
  • Chemically stable
  • Easy cutting, good workability
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Silicone Products
Silicone
Silicone is polymer which consists of –Si-O-Si- with organic group. Silicone is chemical material having both organic and inorganic properties. In addition to being excellent in heat resistance, weather fastness and electric properties. Silicone products come in various forms such as rubbers and resins. Silicone is widely used in every industry and is an indispensible high performance material.
Applications
  • Liquid silicone rubber Adhesive seals / Coating on electric parts, etc. / Molding
  • Millable type silicone rubber Gaskets / Rolls / Insulating rubber parts / Heat resisting rubber parts / Flame resisting rubber parts
  • Silicone resin Heat resisting paints / Weather resisting / Chemical resisting paints / Release agents / Surface protection of plastics
  • Silicone oil Damper oils / Lubricating oils / Foam stabilizer / Lipsticks / Ointment
  • Silicone varnish for electrics High temperature insulator / Vanish for mica binding / Varnish for paints
  • Silicone varnish for paints Heat resisting paints / Weather resisting paints / Chemical resisting paints
  • Silicone as polymer additive Polyurethane foam stabilizer / Polyvinylchloride foam stabilizer / Leveling agent for paints
  • Silicone grease Lubricants for ball bearings, gas utansils and high temperature furnaces
  • Oil compounds Fillers for electric insulation, moistureproof seals, waterproof seals and heat release
  • Releasing Silicone Releasing agent for metal frame of concrete and casting mold / Prevention of copper wire adhesion
  • Defoaming Silicone Defoaming agent of paints and latexes mixture / Defoaming agent for waste water treatment
  • Water repellent Silicone Moistureproofing of switchboards / Surface protection of rubbers, etc. / Water repellent treatment
  • Silicone compounds Plastic modifier / Water repellent treatment of concrete and mortar
  • Silicone for household Adhesive sealing agents / Rust preventive lubricants / Protecting and polishing agents
  • Silicone for electronics Insulating materials / Potting materials / Coating materials
  • Silicone resin fine powder Modifier for rubbers, paints, synthetic resins and cosmetics, etc.
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Silicone Rubber Products
WACOM Silicone Rubber Moldings
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Property 1. From high precision products to general products
We are able to meet requirement of high precision silicone rubber moldings which has been difficult to produce by the usual rubber molding method.
Rubber switches with conductivity rubber are available. General products of low cost are produced by an overseas collaborator.

Property 2. Strict inspection regarding outward appearance and foreign materials

Being produced in a fully cleaned plant, moldings are mostly free from contamination and are ideal for semiconductor related parts and medical related parts.
Property 3.  Early Deliver
It is of course necessary to consider whether the work is difficult or not, but we need only a short period from preparation of dies to sample delivery.
Property 4.  Special requirements, production of complicated shape
Our engineers will select and combine the most suited silicone rubber materials to produce the best products required by customers. Consult us about your requirement which you have given up due to difficult molding. Our staff will make research as much as possible.
WACOM Silicone Rubber Sheet, Rubber Cap
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General Silicone rubber tube
General Silicone rubber sheet
   Here for size list   PDF : silicone_rubberstd.pdf 

Extruding products in variety
Special Silicone Rubber Sheet
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Available hardness range is from 10 degrees to 90 degrees.
We are able to meet requirements of special characteristics such as conductivity, noncombustibility, heat resistance, heat radiation, high tear resistance.
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Masking Rubber Sheet for Lead Frame Plating
Masking Rubber Sheet for Lead Frame Plating
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Wacom Manufacturing Co., Ltd.

We supply silicone rubber sheet of low hardness for masking for lead frame plating.
Hardness 0 ~20 degree Hs JIS A
Thickness 0.3 ~1.5 mm
Substrate PET film with adhesive tape
Bakelite, Others

Please inquire the specification of hardness, thickness and others.
For detail: PDF:Silicone_RubberMASK_eng.pdf

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Pressure Sensitive Conductive Rubber
Pressure Sensitive Conductive Rubber (Anisotropic Conductive Rubber)
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JSR PCR Switch Grade
JSR PCR Switch Grade pressure-sensitive conductive rubber is a material which combines silicone rubber and insulated metal particles that are distributed throughout. JSR PCR is a pressure-sensitive resistor with switching functions whose magnitude of resistance change shifts suddenly from a insulator (over 10MΩ) to a conductor (below several tens of Ω) depending upon the applied pressure.
JSR PCR Connector Grade
JSR PCR Connector Grade is a type of anisotropic pressure sensitive conductive elastomer. This connector shows conductivity only in thickness direction. This new anisotropic conductive elastomer which is a composite material consists of silicone rubber and metal particles coated with gold which are arranged by a special method, and is applicable in various ways as a connector element.
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Machining Parts
Machine Processing Parts
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Property of parts manufacturing
In order to meet every requirement, skilled workers input an automatic program of processing conditions such as cutting conditions and tool exchanges. Machines work based on data acquired by such program.
Automatic processing by MC and NC enables to produce the parts of great variety efficiently.
Also, we have measuring tools of high precision for inspection and measurement so that we would produce products of high precision and high quality as required.
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High Purity Silica Powder
High Purity Silica Powder
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Our silica powder is crystal silica powder produced from high purity silica rock imported from Sri Lanka and India. This silica powder is used for producing optical glass, as resin filler and, in many other ways.

Typical chemical analysis values and particle distribution values are as follows.

PDF : silica.pdf 
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Natural Crystal and Silica
Natural High Purity Crystal and Silica
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Natural crystal (lasca) is widely used as material of quartz glass and of artificial crystal. Natural silica quartz is the best material for optical glass, fused silica (for IC package).

Typical analysis values are as follows.

   PDF : laska.pdf 
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Natural Mica
Natural Mica
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We have been importing Muscovite and Phlogopite Mica from India, Sri Lanka, Madagascar and Brazil since 1937. Blocks, Splittings, Scraps, Flakes, Powder and Fabricated mica are available.
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Plastic Products
Plastic Processing Products
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We are prepared to meet customers’ various requirements. We have accumulated knowledge about resin ranging from general en-pla to super en-pla.
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Fine Ceramics
Fine Ceramics
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Fine Ceramics have characteristics and function which old basic materials such as metals and plastic do not have. As such, Fine Ceramics are greatly counted on by the various industries.
We assure you that we can give you dependable service in filling diversity of your needs by making available a complete line of our Fine Ceramics.
　■　Alumina　［　Al2O3　］
　　Alumina is outstanding in hardness, abrasion resistance and mechanical strength, and is also excellent in chemical resistivity and physical stability. Alumina has also such excellent characteristics as high heat conductivity and electric insulating property among other things.
　■　Silicon Nitride　［　Si3N4　］
　　Silicon Nitride is superior to Alumina in abrasion resistance, strength at high temperatures and thermal shock resistance. Silicon Nitride has also high corrosion resistance to molten metals and, therefore, its wide applications are expected to develop in the metal manufacturing industry.
　■　Silicon Carbide　［　SiC　］
　　Silicon Carbide has mechanical and chemical superiority and has also extremely high heat conductivity among inorganic materials. Since Silicon Carbide retains its strength at high temperatures, its use is relied on as high temperature structural material in place of metalic materials.
　■　Zirconia　［　ZrO2　］
　　Because of its high hardness and toughness, Zirconia is becoming more and more popular as high performance material, structural material and basic material for daily necessities.
　■　Cordierite　［　2MgO・2Al2O3・5SiO2　］
　　Being porous, Cordierite is used for heaters, heat exchanges and hart accumulators which must withstand rapid heating and quonching.
　■　High Purity Mullite　［　3Al2O3・2SiO2　］
　　No alkali being contained, High Purity Mullite excels in high temperature stability, high temperature intensity, electric insulation, and creep resisting properties.
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