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  1. Corporate Profile
  2. Product Information
    1. Foil Products
      1. Applications
      2. Each product (Electrical machinery and apparatus)
        1. TOYAL-CARBO®
        3. TOYAL PASS®
        4. E-FOIL
        5. Ranafoil™
        6. Etching circuit foil
        7. Precision etched circuit products "CUME®"
      3. Each product (Foodstuffs, pharmaceuticals and industrial materials)
        1. TOYAL LOTUS®
        2. Toyal Dry™
        3. READ-MAX®
        4. Child resistant PTP - Child Proof™
        5. Hairline
        6. Alnoble®ZR
        7. Vacuum insulation materials
      4. Production bases
        1. Yao Works
        2. Kanbara Works
        3. Chiba Works
        4. Gunma Plant
        5. Chigasaki Plant
        6. Shonan Yabata Plant
    2. Powder Products
      1. Each product
        1. Aluminium alloy powder
        2. Aluminium nitride
        3. Aluminium powder for fillers
        4. High-purity spherical aluminium powder
        5. Brazing paste (Brazing filler metal pastes)
      2. Production bases
        1. Hino Works
    3. Paste Products
      1. Each application
        1. Automobiles
        2. Household electrical products and digital appliances
        3. Printing inks (Packaging materials, containers, cloth, etc.)
        4. Construction, machinery and heavy-duty anticorrosion
        5. Heat resistance and thermal insulation
        6. Powders and PCM (Pre-coated metal)
        7. Cosmetics
        8. Resins and films
        9. Electronics products
      2. Each product
        1. Leafing Alpaste®
        2. Non-leafing Alpaste®
        3. High-gloss Alpaste®
        4. TD Series (for printing inks)
        5. Resin coated Alpaste®
        6. Alpaste® for water based coating
        7. Colored Alpaste® "FRIEND COLOR"
        8. Interference color aluminium pigment "CHROMASHINE®"
        9. Interference color aluminium pigment "Cosmicolor®"
        10. Aluminium flakes for powder coating
        11. Stainless steel flakes
        12. Metallic compounds "METAX®"
        13. Aluminium thermal conductive filler
        14. Aluminium electrically conductive filler for firing
        15. Metal coated electrically conductive filler
        16. Dummy balls
      3. Catalog [PDF]
      4. Core competencies
        1. Flaking technologies (Shape control, fine powder pulverization)
        2. Surface treatment technologies
        3. Powder plating technologies
        4. Hybrid technologies
        5. Solvent substitution technologies
        6. Blending technologies
      5. Production bases
        1. Shinjo Works
      6. Troubleshooting Guide
        1. For Better Use Of ALPASTE
        2. For Safe Use Of ALPASTE
        3. Problems Resulted From ALPASTE In The Paint System (1)
        4. Problems Resulted From ALPASTE In The Paint System (2)
        5. Recommendation To Treated Type
    4. Solar Cell Related Products
      1. Each product
        1. Toyal Solar®
        2. ALSOLAR®
      2. Production bases
        1. Yao Works
        2. Hino Works
  3. Financial Information
  4. Environmental measures
  5. Research & Development
  6. Toyal Technical Report
  7. Group Company

Recommendation To Treated Type

Types of Alpaste

Type Treatment Function
F Type Polymer coating Chemical resistance,
W Type Treatment by inhibiter Water borne metallic Paint

Type Treatment Function
D Type Deodorized Printing ink
PCF Type Resin coated flake Powder Coating
Dry flake Aluminium Flake Powder ALC, Slurry Explosive, Plastic coloring
Solvent changed Type Base solvent exchange Printing ink, Marine, Plastic coloring

C Alloy Paste
Type Treatment Function
RFA Type Stain less Paste Exterior (chemical resistance)

Treated Alpaste products and their characteristics

Treatment Non treated Resin coating
Type FX FZ
Color appearance Particularly excellent Excellent Excellent
Resistance to peeling Poor Particularly excellent Particularly excellent
Electrostatic property addition Poor Particularly excellent Particularly excellent
Acid Excellent Particularly excellent Particularly excellent
Alkali Poor Excellent Particularly excellent

Particularly excellentExcellent  ExcellentGood  PoorNot functional

Note 1: The above-mentioned are the data obtained by our varnish system and subject to being changed by the type of varnish or the particle size of ALPASTE.
Note 2: The chemical resistance when the paint for plastic coating is used.


Adhesion improvement and peeling countermeasures

When being used to the plastic coating with 1-coat, ALPASTE may cause the poor adhesive problem, which is resulted in the poor scotch tape peeling test, by being affected by fatty acid on the aluminium flake surface. (No problem happens in the case of 2-coat film in which a clear-coat is applied.)

It is effective to prevent such problem to use the treated grades mentioned as below:

Resin coated flake (FX or FZ type)
Coated with acrylic resin

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Electrostatic characteristic addition

When the high voltage is applied to the metallic paint the oxidized film and fatty acid covering the aluminium pigments may cause the dielectric breakdown by being applied with high voltage, and the aluminium pigments are connected just like a conductor and let the electric current go to the earth side. Then the voltage cannot be applied to the paint for electrostatic coating.

The following processed grades are effective to prevent the said problem.

Resin coated flake (FX or FZ type)
Coated with acrylic resin

Chemical resistance (acid resistance, alkali resistance)

It is recommendable to use resin coated ALPASTE, which is uniformly coated with special polymer on the aluminium flake surface, for chemical resistant application.

Resin coated flake (FX or FZ type etc.)
(There are some grades depending on the required application)
Application: Paint/ink for plastic coating
Plastic coloring  Other general paint
(It is also effective to improve adhesion and electrostatic property.)

Gas generation in water-based coating

Aluminium is well known as an amphoteric metal and generate the hydrogen gas by reaction with water at both pH areas, shown as below:

Acidic area: 2Al + 6H+  2Al3+ + 3H2
Alkaline area: 2Al + 2OH- + 2H2 2AlO2- + 6H2

The oleic acid or stearic acid used as the milling agent of aluminium paste is thought to be absorbed on -OH and -O of the oxidized film of aluminium surface. But the fatty acid film is apt to be removed in the presence of water, and the surface oxidized film is too thin to prevent from reaction with water.
There are three typical measures to treat the aluminium flake surface so as to give it the water resistance:

  • Treatment with inorganic compound (WJ, WX treatment,etc.)
  • Treatment with organic compound (WE, WB treatment,etc.)
  • Treatment in the paint manufacturing process

The stability and effect of the treatment to aluminium flake surface largely depend on the composition of binder to be dispersed and the pH area to be used.

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