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| MINGSHI ACRYLIC GOODS |
What Is Acrylics
By chemical definition, Acrylics represent all the chemicals of acrylate/methacrylate monomers and their derivatives. Among many monomers in the methacrylate family, the most commonly heard is methyl methacrylate. It is the prime element that is used through polymerization to produce acrylic sheets, pellets, bead and resin, which are all referred to as "Acrylics" in the current plastic market and are suitable for various applications.
Organic Glass and Acrylic Sheet
In some countries, organic glass represents any kind of transparent plastic product including acrylic sheet. To differentiate from other transparent polymers, the term, "Acrylic Sheet", is specifically used to describe Polymeric Methyl Methacrylate (PMMA) sheet.
Features of Acrylic Sheet
Acrylic sheet, including those of high thickness, has distinguishing characteristics of high light transmittance (up to 92%) and superior outdoor weatherability. It possesses high gloss and surface hardness and is easy to fabricate and thermoform. The sheet is also chemical resistant and is available in many attractive colors including translucent ones.
PROPERTY
Light transmission and low haze are some of the best assets of acrylic, and it exceeds the optical clarity of any thermoplastic competitor. Equally distinguishing for acrylic in the competitive arena is its excellent weathering properties. Acrylic easily outperforms the competition in end-use environments which include out-door exposure to sunlight, humidity, and temperature changes. Outstanding resistance to ultra-violet light and resistance to crazing after thermal cycling sets acrylic apart for lighting applications.
| Mechanical properties: |
Higher impact resistance - breakage resistance 6-17 times greater than window glass. |
| Optical Properties: |
Excellent optical clarity and complete transparency of 92% which is equivalent to the best optical glass. |
| Thermal properties: |
Good low temperature characteristics. |
| Environmental properties: |
Excellent long-term resistance to weathering and sunlight. Resistant to weak acids and alkalis, aliphatic hydrocarbons and most detergents and cleaning fluids. Low water absorption. |
| Processing and finishing: |
Can be cast as sheet and thermoformed; injection moulding, extrusion. Excellent dimensional and tolerance stability. Able to accept decorative paints, lacquers and metallic deposits. Can be solvent cemented. |
 PMMA compared with other materials
| |
| Property |
Units |
PS |
PC |
PMMA |
t-PMMA (Impact) |
PETG |
| Tensile |
GPa |
3.2 |
2.78 |
3.2 |
2.4 |
1.96 |
| Tensile Strength |
MPa |
72 |
72 |
75-85 |
58 |
48 |
| Unnotched Impact |
kJ/m2 |
10 |
--- |
18-26 |
60 |
--- |
| Notched Impact |
kJ/m2 |
3.3 |
176 |
1.7-2.2 |
7.7-25 |
33 |
Thermal
| Property |
Units |
PS |
PC |
PMMA |
t-PMMA (Impact) |
PETG |
| Glass Transition Temperature |
Degree |
80-90 |
149 |
108 |
108 |
81 |
| Melting Temperature |
Degree |
240 |
270 |
230 |
235 |
180 |
| Processing Temperature |
Degree |
204 |
290 |
245 |
245 |
280 |
| Continuous Service |
Degree |
82 |
132 |
85 |
80 |
65 |
| Thermal Degradation Temperature |
Degree |
290 |
>300 |
310 |
310 |
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