(polymethyl methacrylate) ACRYLIC

 Thanakrit Thiengtham  Nattapon Tangpipatpairee PRESENT BY

Acrylic is the common term for the synthetic polymer, polymethyl methacrylate (PMMA). Since it’s inception to the market, acrylic has significantly increased in both use and benefit. This transparent thermoplastic material is now sold under various trade names including but not limited to Plexiglass, Perspex, Acrylite, Acrylplast, and Lucite. WHAT IS ACRYLIC ?? polymethyl methacrylate

Physical Properties Aesthetic Acrylic fibers are attractive and have a soft, pleasant hand. Bulky spun yarns are textured to be wool-like. Apparel and furnishing items of all acrylic or acrylic blends are attractive. Their luster is matte due to delustering, the irregular cross-sectional fiber shape, and fiber crimp. Since these products are almost always staple fibers, their wool-like appearance is maintained. Bulky yarns and bicomponent fibers also contribute to the wool-like appearance. PROPERTIES OF ACRYLIC

Acrylics are not as durable as nylon, polyester, or olefin fibers. Dry tenacity is moderate, ranging from 2.0 to 3.0 g/d (grams per denier). The abrasion resistance is also moderate. The elongation at break is 35 percent. Elongation increases when the fiber is wet. The overall durability of acrylic fibers is moderate, similar to that of wool and cotton. DURABILITY

The fiber surface of acrylic fibers is much less regular than that of other synthetic fibers. In spite of the relatively low moisture regain of percent, acrylic are moderately comfortable because of the irregular fiber surface. Instead of absorbing moisture and becoming wet to the touch acrylic fibers wick moisture to the fabric's exterior where it evaporates more readily and cools the body. Another factor that makes acrylics comfortable is that the fibers and yarns can be made with high bulk. The resulting bulky fabrics retain body heat well so they are warm in cold temperatures. COMFORT

The dimensional stability of acrylic fabric is good. Acrylic shrink when exposed to boiling water, so high temperatures and steam should be avoided. The fibers have poor hot- wet properties. Acrylic fibers cannot heat set because it does not melt, but decomposes and discolours when heated. APPEARANCE RETENTION

Weak alkalies do not affect acrylics. Concentrated alkalies degrade acrylics. Acrilan is the most alkali-resistant of the acrylic fibers. Cold, concentrated nitric acid dissolves acrylic fibers, and other concentrated acids weaken them. Dilute acids do not harm the fibers. CHEMICAL PROPERTIES

The acrylic fibers decompose before they melt, although a fiber held close to a flame will shrink away from it. Acrylic fibers burn with a yellow flame. They form a hot gummy residue that drips away from the burning material. The molten drip solidifies to a hard, brittle black bead. The materials are not self-extinguishing. THERMAL PROPERTIES

Public Aquarium Windows Acrylic is the ideal material for Aquarium Construction. Acrylic has been used for many years in building fish tanks, enabling Hydrosight to acquire good knowledge and experience in this sector. We offer Cylinder Aquariums, shaped walls and Acrylic Tunnels. APPLICATION OF ACRYLIC

Our Ship windows can be used near the water line or even submerged. They are used for observing marine life but also for monitoring sea floor. ACRYLIC SHIP WINDOWS

Hydrosight offers both custom cast Submarine Windows certified by a classification society of your choice and plain windows cut to size certified by German Lloyd. ACRYLIC SHIP WINDOWS

REAR PROJECTION SCREENS Semi-transparent displays, that are illuminated by a projector from the backside are oftenly made from acrylic. This is especially the case for large and very large displays. Even spherical displays might be possible.

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