Coated Aluminium sheet for PCB product technical sheet

2019-12-10 16:24Writer: qyadminReading:

Aluminium sheet for PCB product

Aluminium sheet for PCB product  specification

 

coated aluminium sheet


      pre-painted aluminium sheets are coil-coated with a Class 1 PVdF flexible paint system.
PVdF has excellent weathering properties, colour-fastness and UV resistance. and is the most selected finish for construction, giving long life and a unlimited range of
colours.

      coated aluminium sheets are color. coated with first class PE/PVDF flexible paint system. PE/PVDF painting has excellent weathering properties, colour-fastness and UV resistance. and is the most commonly selected finish for construction, giving long life. and a unlimited range of colors.

      These aluminium costed sheets can punched, guillotined and bent using standard machinery to. provide a finished product. All color coated aluminum sheets have a UV resistant film with directional arrows. applied to the painted surface to protect the finish during fabrication and installation. Our stock range consists of the most commonly used sizes and gauges and we can offer bespoke sizes. colors and thickness subject to order details.

 

Application scope of coated aluminum entry board

 
-As coated aluminum sheet can promote drilling precision. this product applied for PCB drilling with high precision of hole site. It’s produced for the PCB drilling with micro diameter at 0.1~0.4mm. Besides, coated aluminum sheet. can promote precision of hole site and thickness of plate
 
-It’s used for currently high-precision and high-density IC carrier plate (package substrate).
 

Usage of coated aluminum entry board

 
-Coating side is upward and aluminum side is downward on PCB
-The height of drill point needs to be 1.5~4 times than its diameter for chip removal
-Being pasted above base plate. drilling under drill point is the primary contact surface-
-Notice if tape connected to cover plate
-No fold or scratch allowed on cover plate. 

other coated sheet

 
     SAF can spray coat flat aluminum sheet with a PVDF coating.  PVDF sold under the trade names Kynar 500 and Hylar 5000. This is a popular choice when SAF customers need both aluminum sheet. and a specified color because SAF can fill aluminum sheet orders from inventory. and spray-coat to customer specifications. all under one roof.
 
    Before we spray coat flat aluminum sheet. we make sure our customers know color will differ from coil coated sheet.  spray coated flat sheet will not be flat because of the warp imparted. by the high temperatures required to cure PVDF.  Spray coated sheets will have rack marks in each of the four corners. and the surface texture will not match coil coated sheet.
 
     even PVDF will craze, and may even crack or peel.  To cut crazing, sheets should formed at temperatures above 70 degrees Fahrenheit.  Spray coated PVDF coatings on metal thickness greater than 0.050″ will almost peel. and delaminate when formed. and spray coatings on thin gage aluminum will craze more than coil coatings.  Despite these caveats, customers continue to buy this product from SAF and put it to good use.  So if you need a special custom match on aluminum flat sheet, we may be able to meet your needs.  Contact our Customer Consultants or call 1-800-241-7429.
 
     it is important to understand that a paint has to be flexible to be formable.  Popular paints such as Polycron, Acrodize, Sunstorm, Flurodize, Polyceram. and most powder coatings are brittle and will crack and peel when formed.  If one of these brittle coatings specified, you must form the aluminum and then have it spray coated. Likewise, 3-coat systems should never be spray coated then formed. Even with 0.040″ thick aluminum, a 3-coat system is likely to craze, crack and peel.

 
      Liquid paint composed of pigment, resin, and solvent. Powder paint is pigment encapsulated in a powdered resin. and is thus thought of as “Paint without the solvent.” Powder coatings and liquid coatings made from the same resin. and pigment will have the same performance characteristics. For a given resin, the decision to use a powder or liquid coating is a question of application technique.
 
      The real advantage of powder is the reduction. in air pollution compared to liquid coatings. When powders cured in an oven, they emit no VOCs. A disadvantage of powder is the large batch sizes that required. The powder manufacturers are aware of this problem and a few of them keep colors in stock. that they distribute in small batches. Several companies manufacture exterior grade powders using a Polyester TGIC resin. Polyester TGIC powders are currently available in more stock colors. than any other powder. Several companies stock hundreds of colors of Polyester TGIC powders. Polyester TGIC struggle with gloss retention compared to PVDF powders. but used in Europe.
 
      Some resins are more manufactured in liquid coatings. and some are more manufactured in powder coatings. A particular resin is usually manufactured in either powder or solvent-based coatings. but not both. Examples of this are epoxy which is a powder coating, and PVDF which has manufactured as a liquid coating. Many of the perceived advantages of powders over liquid coatings. such as hardness and gloss are actually characteristics of the resin.
 
      Powder coatings from most manufacturers are only available in large batches. and custom colors can be very expensive. This is because each batch of powder. must ground to order using costly grinding equipment. Solvent born colors will continue to maintain their niche in the market. because of the ease with which small batches can mixed. The ability to “mix and match” gives painters . and their customers unequalled flexibility and ease of use.

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