Overview
Idemitsu PS is a polystyrene resin manufactured by Idemitsu Kosan, a leading Japanese chemical company. It is valued for its clarity, rigidity, and versatility in injection molding and extrusion processes. The material is commonly supplied as pellets and is compatible with standard plastic processing equipment. Polystyrene resins like Idemitsu PS are classified into general-purpose (GPPS) and high-impact (HIPS) grades. GPPS offers exceptional optical clarity, while HIPS incorporates rubber modifiers for improved toughness. Both variants are widely used in industrial and consumer applications.
Physical and Chemical Properties
Idemitsu PS exhibits a density of 1.04–1.06 g/cm³, making it lightweight yet rigid. Its transparency exceeds 90% light transmission in GPPS grades, suitable for see-through packaging. The material softens at around 100°C and melts at approximately 240°C, but it decomposes when exposed to prolonged high temperatures. Chemically, polystyrene is resistant to water, acids, and alkalis but dissolves in solvents like toluene or acetone. It has low moisture absorption (<0.1%), ensuring dimensional stability in humid environments. Electrical insulation properties make it useful for electronics housings.
Main Applications
The primary use of Idemitsu PS is in packaging, including clamshell containers, CD cases, and cosmetic jars. Its clarity and printability make it ideal for product displays. In disposable applications, it is molded into cutlery, cups, and medical trays due to its cost-effectiveness. Consumer electronics manufacturers utilize PS for battery casings, buttons, and transparent covers. HIPS grades are preferred for toys, refrigerator liners, and point-of-sale displays where impact resistance is critical. Specialty grades with flame retardants meet UL94 standards for electrical components.
Safety and Storage
Idemitsu PS pellets are non-toxic but generate styrene vapors if overheated during processing. Adequate ventilation and fume extraction are mandatory in production facilities. Workers should wear dust masks and gloves to prevent irritation from fine particles. Storage recommendations include keeping bags sealed in dry conditions below 30°C to prevent clumping. Avoid contact with oxidizing agents or strong solvents. PS is not biodegradable; recycling or incineration with energy recovery are preferred disposal methods.
B2B Procurement Guide
Industrial buyers should specify the required grade (e.g., GPPS for clarity or HIPS for durability) and any additives like UV stabilizers. Typical order quantities range from 25-kg bags to bulk tanker deliveries for large-scale processors. Prices fluctuate with crude oil markets, as styrene monomer is petroleum-derived. Lead times average 2–4 weeks for standard grades. Certifications like FDA compliance (for food-contact applications) or RoHS should be verified. Asian markets often source directly from Idemitsu’s regional distributors.
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