Polycarbonate had earned the tag because the the most appropriate material to use inside the automotive industry. However, in recent times, Polymethyl Methacrylate, the PMMA polymer or commonly known acrylic plastic, has efficiently risen to the growing demands from the automotive industry in replacing polycarbonate for the best important utilization in the, namely, automotive glazing.

Long established to use in a variety of vehicle applications including decorative trim, ambient lighting and door entry strips, automotive glazing is one of those fields that offer the highest growth potential for PMMA.
Related key options that come with acrylic plastic that make it well suited for the whole process of automotive glazing are discussed below.
Transportable
To generate a comparison on the erogenous level, PMMA is half the extra weight plus much more transparent than glass, thereby providing crystal clear visibility even during true of fluctuating and unstable temperatures. Due to its molecular structure, thermoformed polymethyl methacrylate are now used almost exclusively for car window glazing where every one of the necessary requirements for light-weight materials which can be safe, simple to process and perform in all weathers are met.
On top of Scratch Resistance
Another essential requirement of glazing is scratch resistance. Standard PMMA already has got the highest surface hardness of most thermoplastics even though uncoated. However, for automotive glazing, you can find stringent conditions to get fulfilled to meet the perfect condition of scratch resistance. The effective use of a coating is thus mandatory. Since PMMA is intrinsically UV along with weathering-resistant, a single-step coating works well. On the other hand, thermoplastics that have low resistance to weathering have to have a two-step coating system. This leads to relatively high costs for coating.
New design possibilities
PMMA glazing is 40 to 50 percent lighter than conventional glass, which piques the interest of automobile manufacturers. With the advantages being immediately obvious, PMMA is known as the proper fit for automotive glazing. Weight savings apart, the transparency of acrylic plastic along with its extremely high weathering resistance, pleasant acoustic properties, and exceptional form ability allow freedom enabling entirely new design possibilities.
Less anxiety birefringence
PMMA exhibits hardly any stress birefringence and also this serves as a major benefit over other thermoplastics including polycarbonate, that was primarily used for glazing previously. In contrast to traditional materials including polycarbonate, moulded PMMA, offers a distinct potential for functional integration – reducing recess depth and assembly costs.
Environment-friendly
The new goal inside the automotive companies are to formulate clean low fuel consumption vehicles. Due to the awareness and the need for eco-friendly initiatives in today’s general scheme of things, PMMA serves as a perfect replacement for glass inside the automotive glazing segment. As vehicle manufacturers push the boundaries of design, also is automotive glazing evolving.
SUMIPEX® PMMA polymer offers characteristics that satisfy the latest challenges inside the transportation sector. It’s a monumental challenge for car makers that are looking to sit in recent environmental requirements and so are thinking of alternatives that reduce greenhouse gas and save fuel. It is the perfect partner within this movement given it helps make cars lighter.
As being a leading manufacturer of SUMIPEX® PMMA polymer, Sumitomo Chemical is pleased to assist you understand its properties and how it best suited to automotive glazing.
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Just how do a liquid which includes just 5 carbon atoms, 2 oxygen atoms and 8 hydrogen atoms supply for heavy duty purposes where thermal resistance, electrical resistance and mechanical strength is of prime importance? The solution lies in a word – “Polymerisation”.
Through this infographic, we trace your way of MMA (Methyl Methacrylate), a liquid monomer that is polymerised to bring about PMMA polymer (Polymethyl Methacrylate), and its particular various grades.

MMA may be polymerised to PMMA through solution polymerisation, emulsion polymerisation and bulk polymerisation techniques. Each one of these reactions occur in the existence of a catalyst. The resulting sumitomo chemical japan may be modified to various shapes, sizes and forms with respect to the additives.
The varied grades of SUMIPEX®, the Polymethyl methacrylate resin created by Sumitomo Chemical, which can be obtained on adding additives are:
• ‘High Impact Grade of SUMIPEX® PMMA’ – Properties like high flow and good heat resistance get this to ideal for manufacturing extruded sheets/ pipes/ rods, construction materials, automotive parts and industrial applications
• ‘Extrusion Grade of SUMIPEX® PMMA’ – Good extrusion molding characteristics, high surface hardness, superb weatherability and excellent chemical resistance will be the properties of this grade that favour its used in extruded sheets/ pipes/ rods.
• ‘Heat Resistant Grades of SUMIPEX® PMMA’ – Excellent heat resistance, excellent surface hardness and mechanical strength enables the application of this grade in automotive parts for example tail lamp, instrument cluster, optical Lens, general light fittings, etc.
• ‘Optical Grades of SUMIPEX® PMMA’ – With excellent heat resistance and flow properties, the optical grades with extremely low levels of foreign contaminants bring light Guide panels and optical lenses.
• ‘High Flow Grade of SUMIPEX® PMMA’- With characteristics like high-flow during injection molding and good moldability, this grade is mandatory for intricate parts and thin-wall parts molding for example watch and clock cover, lighting cover, name plate, house ware, etc.
• ‘General Purpose Grades of SUMIPEX® PMMA’ – General Purpose Grades determine distinction between normal and optical grades/special grades. General Purpose Grades like MH, LG, LG2, etc. also come under “Extrusion Grade”, “Heat Resistance Grade” and “High Flow Grade”. With balanced properties for example heat resistance and mechanical strength, this grade works to create number of products for example house ware, stationery, telephone buttons, piano keys, electrical accessories, ornaments, etc.
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