Which materials are suitable for vacuum molding
Vacuum blister molding is a widely used plastic processing technology, which is mainly used to adsorb thermoplastic sheets on the surface of the mold, deform them and adhere to the mold through the action of vacuum negative pressure, and finally form the desired shape. However, not all materials are suitable for vacuum molding. Here are some of the materials that are suitable for vacuum molding:
1.PVC material.
PVC (polyvinyl chloride) is a commonly used thermoplastic with good processability and mechanical properties. PVC material** is inexpensive and easy to obtain, so it is widely used in vacuum blister molding. After being heated and softened, the PVC sheet can be easily adsorbed on the surface of the mold, and after cooling, it can be formed into the desired shape.
2.PS material.
PS (polystyrene) is also a common thermoplastic with good transparency and gloss. PS sheets are easy to soften and adsorb on the surface of the mold when heated, so they are also suitable for vacuum blister molding. PS material is often used to make packaging boxes, tableware, plastic flowers and other products.
3.PET material.
PET (polyethylene terephthalate) is a crystalline plastic with excellent mechanical properties, heat resistance and chemical resistance. PET material is not easy to deform at high temperatures, so it is suitable for vacuum blister molding. Due to the good environmental performance of PET materials, they have been widely used in food packaging and other fields.
4.PP material.
PP (polypropylene) is a semi-crystalline plastic with excellent mechanical properties, heat resistance and chemical resistance. The ** of PP material is relatively low and has good processing properties, so it is also suitable for vacuum blister molding. PP material is often used to make tableware, containers, plastic bags and other products.
5.PMMA material.
PMMA (polymethyl methacrylate) is a thermoplastic with excellent transparency, also known as plexiglass. PMM** material is easy to soften and adsorb on the surface of the mold when heated, so it is suitable for vacuum blister molding. Due to the high transparency and aesthetics of PMMA material, it is often used to make products such as display stands, display cases, and signs.
In conclusion, the material suitable for vacuum blister molding should have certain thermoplasticity, easy processing and adsorption on the surface of the mold. When selecting materials, it is necessary to consider comprehensively according to the requirements and uses of the product, and select the appropriate materials for processing. At the same time, in order to obtain better processing effect and quality, it is also necessary to pay attention to the control and adjustment of processing technology, such as the control of temperature, pressure, time, etc.