What are the process characteristics of acrylic sheet? Hardness is one of the parameters that reflect the production process and technology of cast acrylic sheet and high temperature resistance.
1, the hardness directly affects whether the sheet shrinks, bends and deforms, and whether the surface cracks during processing. The hardness of acrylic plate is one of the hard indicators to measure the quality of acrylic plate, and the average hardness is 8 degrees or 9 degrees.
2, thickness (acrylic tolerance) Acrylic plate thickness has acrylic tolerance, so the control of acrylic tolerance is an important embodiment of quality management and production technology. The production of acrylic has the international standard GB7134 casting plate tolerance requirements: the tolerance of 3mm thick acrylic plate is ± (0.4mm)
3, the transparency of acrylic sheet, raw material selection, advanced formula follow-up and modern production process to ensure that the sheet has good transparency.
4, process characteristics: acrylic plate has weather resistance, with obvious moisture absorption. The acrylic sheet has effective and distinct non-Newtonian fluid properties over the molding process temperature range. With the increase of shear rate, melt viscosity will decrease significantly, and melt viscosity is also very sensitive to temperature change. Therefore, for the molding process of acrylic sheets, increasing the molding pressure and temperature can significantly reduce the melt viscosity and obtain better fluidity. The acrylic sheet begins to flow at about 160 ° C, begins to decompose above 270 ° C, and has a wide processing temperature range. The melt viscosity of acrylic plate is high, the cooling speed is fast, and the product is easy to produce internal stress. Therefore, the process conditions are strictly controlled during the molding process, and post-processing is also required after the product is formed. Acrylic sheet is an amorphous polymer, and its shrinkage rate and change range are small, generally about 0.5%-0.8%, which is conducive to forming plastic parts with high dimensional accuracy. Acrylic sheets have good cutting properties, and their contours can be easily machined into a variety of desired sizes.
5, with crystal transparency, transmittance greater than 92%, soft light, clear vision, with acrylic color plate has a good color effect. Acrylic sheet has excellent weather resistance, high surface hardness and gloss, and good high temperature performance. Acrylic sheet has good processing properties and can be thermoformed or machined. Transparent acrylic plate light transmittance is higher than glass, but its density is only half that of glass. Moreover, it is not as brittle as glass. Even if it is damaged, it will not form sharp shards like glass. The wear resistance of acrylic plate is close to that of aluminum, and it has good stability and corrosion resistance to various chemicals. Acrylic sheet has good printability and spraying property. Use appropriate printing and spraying processes.
At the time of processing, because the cooling rate of the acrylic sheet is very fast, and it takes more than ten seconds to finalize at room temperature, people who want to customize the shape need to strictly control the temperature.
As a benchmark enterprise in the acrylic industry and a number of acrylic national standards, PG is a high-tech enterprise engaged in the research and development, production, sales and finishing of acrylic sheets. PG insists on the use of new materials and the use of unique processes to produce sheets with superior performance, safety and reliability.
https://www.pgacrylic.com
