What is the difference between Alex and plastic?

We often see others do the door of the blister light box, like plastic, which will put some small light-emitting lamp beads, the price is more expensive, I store door is installed ~ such as the door of the China Merchants Bank and, is called acrylic, not acrylic plexiglass acrylic (acrylic) brief history of the early 1920s of this century, Rohmenhausen first invented the use of MMA polymerization into the method of acrylic panels, the Sheet was later called "Oroglas/Plexiglas". Features: weathering and acid and alkali resistance performance is good, not due to years of sun and rain, and produce yellowing and hydrolysis of the phenomenon of long life, compared with other materials products, long life of more than three years of light transmittance is good, up to 92% or more, the intensity of the light required is small, saving electricity impact resistance is strong, is sixteen times more than ordinary glass, suitable for installation in the special needs of the security of the zone insulation performance is excellent, suitable for a variety of electrical devices Self-weight light, half as light as ordinary glass, buildings and supports to withstand the load of small colorful, high brightness, other materials can not be compared to the United States of plasticity, shape changes, processing and molding is easy to high recycling rate for the increasingly strengthened awareness of environmental protection agreed to the maintenance of convenient, easy to clean, rain can be cleaned naturally, or with soap and a soft cloth can be used to scrub the classification of plastics, the composition and characteristics of plastics is a kind of versatile Synthetic polymer materials, plastic products abound in our daily lives. From the toiletries we use after getting up, breakfast tableware, to work and study stationery, rest with the seat cushions, mattresses, as well as televisions, washing machines, computer shells, as well as at night to bring us the light of a variety of shapes of lamps and lanterns ...... plastics with its excellent performance to gradually replace many of the materials and materials that have been used for decades and centuries, as well as the use of plastics in our daily life. Plastic has gradually replaced many materials and utensils that have been used for decades and centuries with its excellent performance, and has become an indispensable assistant in people's life. Plastic set of metal hardness, lightweight wood, glass transparency, ceramic corrosion resistance, rubber elasticity and toughness in one, so in addition to daily necessities, plastic is more widely used in aerospace, medical equipment, petrochemical, machinery manufacturing, national defense, construction and other industries.