How can you tell the quality of powder?
How can you tell the quality of powder?
Testing Methods for Powder Coating
- (1) GLOSS TEST (ASTM D523)
- (2) BENDING TEST (ASTM D522)
- (3) HARDNESS TEST (ASTM D3363)
- (4) CROSS HATCH ADHESION TEST (ASTM D3359)
- (5) CHEMICAL RESISTANCE TEST (ASTM D1308)
- (6) IMPACT TEST (ASTM D2794)
- (7) SALT SPRAY CORROSION TEST (ASTM B117)
What are the general tests for in process quality control?
In-process materials should be tested for identity, strength, quality and purity as appropriate and approved or rejected by the quality control unit during the production process. Rejected in-process materials should be identified and controlled under a quarantine system designed to prevent their use in manufacturing .
What are the tests for in process QC?
In-process quality control tests are simply routine checks that are performed during production. They are those tests carried out before manufacturing process is completed to ensure that established product quality is met before they are approved for consumption and marketing.
What are the evaluation parameters for powder?
Post-compression parameters like hardness, friability, drug content, wetting time, water absorption ratio, disintegration time, and dissolution study were also evaluated.
What is test of powder coating?
The gloss of a finished powder coated part is validated by measuring the specular reflection of its surface. This test is performed using a gloss meter, which shines a light onto the surface of the part at a fixed angle, then measures the amount of light reflected off it.
Are there different grades of powder coat?
There are two types of powder coating, thermosets and thermoplastics. Thermoplastic powder coating finishes become liquid and very soft when heated. This eliminates chemical bonding. This process makes the powder coating both reversible and reusable.
What is friability test?
Friability testing is a laboratory technique used by the pharmaceutical industry to test the durability of tablets during transit. This testing involves repeatedly dropping a sample of tablets over a fixed time, using a rotating wheel with a baffle.
What is quality control testing?
Quality control involves testing units and determining if they are within the specifications for the final product. The purpose of the testing is to determine any needs for corrective actions in the manufacturing process. Good quality control helps companies meet consumer demands for better products.
What is QC checklist?
A quality control checklist is basically a written guide for your products’ contents, packaging, color, barcodes, appearance, possible defects, functions and special requirements. It’s also sometimes called an “inspection criteria sheet” or inspection checklist.
How do you test the flow of powder?
Some of the most commonly applied methods to measure the flow of powders include: density indices, such as the Carr index and Hausner ratio, powder avalanching, the angle of repose (AOR), flow through an orifice, powder rheometry and shear cell testing.
What is porosity of powder?
Porosity is defined as the ratio of the total pore volume to the apparent volume of the particle or powder (excluding interparticle voids).
How do you inspect powder coating?
What does QC testing mean for powder coatings?
Quality Control Testing, or QC testing offers up a range of simple, easy to perform tests and performance criteria to ensure you’re powder coated finish is going to do just that – perform well. The really good news is it’s simple, cheap and easy to do. You know how it goes.
How often should you do powder coating testing?
The most common areas to test for basic powder coating functionality are: Because proper quality control testing is so important to your success and reputation, we recommend these tests be performed daily, or at least once with every batch of products–and any time you change your coating products or processes.
What kind of test is powder coating adhesion?
Powder Coating Adhesion Testing Adhesion testing measures how well the powder sticks to the part once it is fully cured. As with the cure test, your adhesion test results can be affected by overbake or underbake.Generally, adhesion testing kits are available for specific testing requirements.
What should I look for in a powder coating?
On that TDS, you’ll find a description of the product, the typical physical properties you can expect the powder to provide if applied properly, such as gloss level, hardness, flexibility and adhesion, application tips, cure schedule and storage requirements.