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Floor Coating home >> Coating articles >> American Specialty Coatings: June 2009

American Specialty Coatings

Monday, June 22, 2009

Several Types of Leather Coatings

Leather is one of the most useful materials to the humanity. There are different types of leather or imitation leather which are used for furniture. Bar stools, dinning chairs, sofas and casual furniture - these objects get a decorative look due to covering by leather. From full grain leather to faux leather - there is a wide range of applications.

Full Grain Leather:

Full Grain Leather Premium raw material is the main source from which full grain leather is made of. Aniline is another name given to this leather. If it is dyed, it is called semi-aniline. This leather has its own natural attributes and distinctive smell. It is mainly used for upholstery. This soft and smooth, yet strong texture matures well with age to give a pleasant appearance with passage of time. As it is hard-wearing, it will serve for a longer period. It is considered to be an ideal selection for home furnishings.

Aniline or semi-aniline finish is attributed to full grain leather. When the leather is immersed in a transparent dye, the aniline finish is created. Because of this coloring process, the leather gets transformed to a new look, with its natural grain kept intact. The semi-aniline finish resembles that of aniline. Its additional feature is a thin layer of protective coating which is aimed at preventing stains. Upholstery industry is instrumental in promoting this brand of leather despite its higher price tag.

Merits:

  • Original leather
  • Stain preventing nature
  • Distinctive smell
  • Hard-wearing
  • Sleek & stylish with passage of time
  • Contains ingrained attributes

De-Merits:

  • Exorbitant price tag

Split Leather:
Split Leather
A particular piece of leather that has been split from the skin of a hide is referred to as split leather. It can be split further to get desired effect. Although it is fragile in nature, it is made to be hard - wearing. To create the effect of suede, it is either embossed with a pattern or gets buffed.

Pros:

  • Original leather
  • More hard wearing look
  • Lesser price

Cons:

  • Lighter than full grain leather
  • More fragile comparatively
  • Prone to get damaged by liquid

Suede has another name also - nubuck or buffed leather. By removing the grain or by a splitting operation between the hide & skin, suede is made. Buffing or brushing lends it a soft and stylish surface. It is cheaper than full grain leather. It has to be protected carefully. Or else, it can get damaged by liquids. Due to its fragile quality, it is not used in upholstery sector.

Pros:

  • Original leather
  • Smooth surface
  • Less priced comparatively

Cons:

  • Not easy to protect
  • Can get damaged by a liquid
  • More fragile
  • Wearing fast

Regenerated Leather:
 Regenerated Leather
Regenerated leather has an extremely soft texture. When the leather is subjected to a technical process, due to compressing fibres, this particular finish is obtained. It is also widely employed in contract markets, especially in bars & restaurants.

Pros:

  • Hard-wearing
  • Strong & sturdy
  • Smooth finish
  • Less priced

Cons:

  • Not classified as original leather
  • Smooth matte finish

Bicast Leather:
Bicast Leather
Regenerated leather which has a thick coating of polyurethane is known as bicast leather. It becomes highly durable & strong, suitable for permanent use. It is widely used in upholstery sector & also in furniture making.

Pros:

  • A thin layer of leather
  • Protected from damage from liquid
  • Strong & durable
  • Hard-wearing
  • Less priced

Cons:

  • Smooth plastic finish
  • Not classified as original leather

To be noted:

  • Normal leather
  • Creams to be avoided

Faux Leather:

It is made from synthetic materials. It is durable & widely applied in upholstery industry.

Pros:

  • Hard-wearing
  • Looks like original leather
  • Not susceptible to damage by liquid
  • Cheapest brand

Cons:

  • Not genuine leather

Wednesday, June 17, 2009

Parylene Deposition System: Specialty Coating Systems PDS-2010

specialty_coating_systems_PDS
This system deposits conformal coatings of Parylene N or C. Parylene is applied at room temperature.

  1. The raw material dimer is vaporized under vacuum and heated to a gas which is pyrolized to cleave the dimer to its monomeric form. In the room temperature deposition chamber, the monomer gas deposits as a transparent polymer film.
  2. The thickness of coatings can range from the hundreds of angstroms to several tens of micrometers.
  3. Two chamber sizes accommodate substrates from millimeters across to a maximum of 31cm Dia. X 28cm H)

Applications:

  1. These polymers are widely used in medical devices and for electronics and automotive application.
  2. Coatings are biocompatible and biostable and pinhole-free.
  3. Material provide moisture, chemical and dielectric barriers, as well as low coefficient of friction.

Examples use:

  1. Back substrate for polymer after delamination from wafer surface.
  2. Electrical isolation for submerged components

Monday, June 1, 2009

Benefits of Acrylic Coatings

Acrylic Coatings A pigment that has been suspended in an acrylic polymer emulsion s the source of acrylic paints. This is a mixture of two substances that defy blending. Until 1950, acrylic paints were not available for sales in the market. Acrylic paints are much sought after by artists & painters as they dry faster, unlike oil paints. They can be diluted with water. On dilution, the resultant paint looks similar to a water color painting or an oil painting, because they are prone to dry closer to the desired color. Normally this color is slightly darker. Water colors tend to dry lighter and the amount of lightning cannot be predicted. Artists, who are in the threshold of their painting career, face the same problem. Even though acrylic paints are diluted in water, infact, they become water-resistant once the work of art gets dried. Due to this nature, the artistic display can be preserved for a long time. Acrylic paints can be substituted for oil paintings because they dry faster - within one hour; sometimes in less than one minute. The duration depends upon the quality of the brand and the thickness of the coating.

These paints can be mixed with extenders or retarders depending upon the necessity. By adding these products, the artists can extend the time of drying. Those who paint model figures tend to use extenders or retarders, the only hitch being thy take more time to complete the work. Acrylic paints are preferred by artists due to their permanency. Unlike oil paints which turn yellow due to ageing and oxidizing, acrylic paints have a longer lifespan, not showing signs of yellowing or cracking. As acrylic paints are versatile & challenging, artists enjoy using them. The painters get the desired look by changing the properties. The challenges can b surmounted by grasping the rudiments & planning the execution. One has to be extra-cautious while using acrylic paints as they dry faster. Take a little quantity and use it quickly. These paints are not removable. If solvents are us for removal, the entire canvas stands the chance of getting wiped out.

Acrylic painting Blending can become very difficult after a short duration. Firstly, small segments can be painted and then you can move on to the next. The artist must have an idea of the minute details before proceeding further. For the best results, artist-grade gesso can be employed. Smoothing this on the canvas, sufficient drying time has to be allowed. This will bind the paint to the canvas very strongly. As these paints dry fast, blending becomes very difficult occasionally. Initially, paint in small areas and extend to other areas gradually. To slow the process of drying, a medium can be used. Occasional mists using a water bottle will keep it wet.

Using additives, acrylic paints can be made thinner or thicker. They will change the thickness, the finish, the drying time & the transparency level. By adding water, you can thin it down. More water has to be avoided. An artist can use oil paints, chalk, pen, charcoal & other artistic media on their paintings without ruining the work they have already finished.

Benefits:

  • Fast drying up
  • Color mixing easy
  • Cheaper compared to oil painting
  • Water can be added
  • Color variations aplenty
  • Versatile in nature
  • Water-soluble an easy cleaning
  • Making thick & thin - possible
  • Can be used to stick pictures to paper
 

 

 

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