Application

About PLEXIGLAS® Molding Compounds

Frequently asked questions

Can PLEXIGLAS® items be washed in the dishwasher?
After many dishwashing cycles, moldings made from PLEXIGLAS® standard molding compound may show very fine crazes. Grades PLEXIGLAS® zk30, zk40 and zk50 are certified as being dishwasher-proof. 

How can PLEXIGLAS® surfaces that have become dull or milky matte as a result of cleaning with solvents be repaired? 
This is a mechanical or chemical attack on the material surface. Such damage can only be removed by mechanical grinding and polishing. In many cases, it makes sense to replace the component. 

How can stress cracking of PLEXIGLAS® be avoided?
Owing to the manufacturing process (e.g. rapid cooling), the moldings may contain high internal stress levels. Fastening methods unsuitable for the material (e.g. pointwise fastening) may also provoke higher stress levels in the moldings (mechanical stress). 
When exposed to a corrosive medium (e.g. cleaning agents, screening inks, solvent vapors), these components may show stress cracking. Parts should therefore be produced so as to contain low stress levels (by means of higher mold temperatures, slower cooling, higher demolding temperatures) or subsequent annealing, and should if possible be fastened over large surface areas. Moreover, any cleaning agents used should be compatible with PLEXIGLAS®.

What products are suitable for cleaning parts made of PLEXIGLAS®?
Prior to surface treatment, we recommend cleaning the part by blowing it down with ionized air or washing with a cloth made of glove-lining fabric and warm water to which some dishwashing liquid or ANTISTATISCHER KUNSTSTOFF-REINIGER UND -PFLEGER from Burnus has been added. 

How can surface scratches be removed / polished off PLEXIGLAS®?
Minor scratches can be polished away with "Acrylglas-Polier & Repair Paste" (AGP) from Burnus. Deep scratches must first be ground with coarse wet abrasive paper, then with ever finer grit sizes (up to 1000) until the scratches are only slight. Then polish with AGP, which is available from autorized distributors of PLEXIGLAS®. Mechanical polishing with a buffing wheel and wax is also possible.

How can dust attraction (static charging) be avoided in PLEXIGLAS® moldings?
Like many plastics, PLEXIGLAS® is a typical non-conductive material with good insulation properties, i.e. it has high surface and volume resistivity. Its surface may therefore become electrostatically charged after mechanical cleaning by rubbing with solid objects. Prior to surface treatment, we recommend cleaning the material by blowing it down with ionized air or washing with warm water and dishwashing liquid, or wiping with "ANTISTATISCHER KUNSTSTOFF-REINIGER UND -PFLEGER" from Burnus.

What resistance does PLEXIGLAS® show to UV (ultraviolet) radiation?
Crystal-clear PLEXIGLAS® standard molding compounds show excellent resistance to aging and weathering, including natural UV radiation. This means the material does not turn yellow or become brittle, even after many years of outdoor exposure in various climates all over the world. PLEXIGLAS® retains its superior optical and mechanical properties for many years.

How weather-resistant is PLEXIGLAS®?
Crystal-clear PLEXIGLAS® standard molding compounds show excellent resistance to aging and weathering, including natural UV radiation. Therefore they do not turn yellow or become brittle even after many years of outdoor exposure to various climates around the world.PLEXIGLAS® retains its superior optical and mechanical properties for many years.

What is the chemical resistance (compatibility) of PLEXIGLAS® moldings?
PLEXIGLAS® is generally characterized by good chemical resistance. Molded parts made from PLEXIGLAS® are resistant to most inorganic chemicals, aliphatic hydrocarbons, cycloaliphatic compounds, fats and oils at room temperature, and also to diluted acids and concentrated solutions of most alkalis at temperatures up to 60 degrees Celsius. By contrast, PLEXIGLAS® is attacked by chlorinated hydrocarbons, ketones, esters, ethers, alcohols and aromatic compounds. In case of doubt, tests should be performed or our Technical Service contacted.

How abrasion-resistant are moldings made of PLEXIGLAS®?
Moldings made from PLEXIGLAS® standard molding compound show the greatest surface hardness and thus the best abrasion resistance of all thermoplastics. The high gloss is therefore retained even after prolonged utilization. Impact-modified PLEXIGLAS® Resist molding compounds show somewhat lower abrasion resistance. The attached pdf file states the test methods for abrasion resistance and the values measured for individual grades.

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Disclaimer
This information and all further technical advice is based on our present knowledge and experience. However, it implies no liability or other legal responsibility on our part, including with regard to existing third party intellectual property rights, especially patent rights. In particular, no warranty, whether express or implied, or guarantee of product properties in the legal sense is intended or implied. We reserve the right to make any changes according to technological progress or further developments. The customer is not released from the obligation to conduct careful inspection and testing of incoming goods. Performance of the product described herein should be verified by testing, which should be carried out only by qualified experts in the sole responsibility of a customer. Reference to trade names used by other companies is neither a recommendation, nor does it imply that similar products could not be used.
The Business Unit Performance Polymers of Evonik is a worldwide manufacturer of PMMA molding compounds sold under the PLEXIGLAS® trademark on the European, Asian, African and Australian Continent and under the trademark ACRYLITE® in the Americas.