Heat Resistant Expanding Microspheres CAS 38742-70-0 can withstand maximum processing temperature up to 240℃, acting as high-efficiency physical foaming agents for engineering thermoplastics. The microspheres expand evenly under high-temperature molding conditions and form fine closed-cell structures inside thermoplastic matrix. They achieve lightweight modification and reduce raw material costs while maintaining the rigidity, thermal performance and dimensional stability of finished parts. With

Product Detail

Heat Resistant Expanding Microspheres CAS 38742-70-0 Engineering Thermoplastic Foaming Agent 240℃ Max

Product Overview

Heat Resistant Expanding Microspheres CAS 38742-70-0 are high-performance physical foaming and lightweight additives designed for engineering thermoplastics, with maximum service temperature up to 240℃. Optimized to adapt to the high-temperature molding process of general engineering thermoplastics, the microspheres maintain intact particle structure and stable expansion performance under matched processing conditions. Uniform, dense and independent fine closed-cell structures are formed inside plastic matrix, effectively reducing product density and raw material consumption. While realizing lightweight modification, the product retains good rigidity, heat resistance and dimensional stability of thermoplastic parts. Featuring reliable thermal stability, moderate shear resistance and wide compatibility with multiple engineering thermoplastic systems, it is a cost-effective foaming solution for automotive, electronic and industrial precision plastic components.

Core Features

Max 240℃ Heat Resistance

Balanced thermal performance adapts to molding temperature of common engineering thermoplastics. Microspheres expand evenly without premature foaming, particle rupture or cell collapse within the applicable temperature range, suitable for continuous automated production.

Good Shear Resistance & Low Defect Rate

Optimized shell toughness withstands shear force during injection and extrusion. Less broken particles reduce surface flaws such as silver streaks and bubbles, satisfying basic appearance requirements of thermoplastic finished products.

Efficient Lightweight & Cost Saving

Compact closed-cell structure lowers part weight and material dosage. It cuts overall production costs without obvious loss of rigidity and thermal performance of engineering thermoplastic components.

Broad Resin Compatibility

Ultra-fine powder disperses uniformly in various engineering thermoplastics without agglomeration. It will not negatively affect material surface gloss, printing and adhesive properties.

Improved Dimensional Stability

Uniform foaming structure relieves internal molding stress, inhibits shrinkage, warpage and deformation of molded parts, and improves yield of precision plastic products.

Eco-Friendly Physical Foaming Technology

Based on pure physical thermal expansion principle, no chemical decomposition, low VOC and low odor. Complies with environmental requirements for automotive and electronic plastic accessories.

Product Specifications

Product Name: Heat Resistant Expanding Microspheres

CAS No: 38742-70-0

Product Type: Engineering Thermoplastic Foaming Agent, Lightweight Functional Additive

Maximum Tolerable Temperature: 240℃

Appearance: White Ultra-Fine Powder

Applicable Processes: High-temperature injection molding, extrusion molding

Applicable Materials: Various general engineering thermoplastics and modified plastics

Core Function: Thermoplastic foaming, lightweight modification, density reduction, raw material cost optimization

Recommended Dosage: 1.0%–3.8% (Adjust according to lightweight ratio and product performance requirements)

Application Scope

Widely used in lightweight foaming modification of engineering thermoplastics. Suitable for automotive plastic parts, electronic plastic housings, industrial structural accessories, modified plastic particles and household high-performance plastic products. It solves the disadvantages of heavy weight and high raw material consumption of solid thermoplastic products, covering automobile, electronics, household appliances and industrial manufacturing industries.

Usage Guide

Mix heat resistant expanding microspheres with thermoplastic raw materials evenly by low-speed stirring at room temperature. Avoid high-intensity shear stirring and long-time high-temperature preheating to prevent microsphere rupture and premature foaming. Follow standard injection or extrusion parameters. Microspheres complete stable thermal expansion and closed-cell forming under suitable processing temperature not exceeding 240℃. Adjust microsphere dosage, molding temperature, injection speed and holding pressure according to lightweight targets and surface quality standards. Keep sealed and moisture-proof during production and storage.

Packaging & Storage

Packaging: 25kg sealed moisture-proof composite bag with inner PE liner, dust-proof and leak-proof, suitable for industrial bulk supply and long-distance transportation.

Storage: Store in dry, cool and ventilated warehouse, keep tightly sealed at all times. Avoid direct sunlight, high-temperature stacking and humid environment to prevent caking and spontaneous foaming. Standard shelf life is 12 months under proper storage conditions.

Our Advantages

Our heat resistant expanding microspheres support maximum 240℃ processing temperature, with stable expansion ratio and reliable batch consistency. Uniform closed-cell structure achieves effective lightweight and cost reduction while guaranteeing basic mechanical and surface properties of engineering thermoplastic parts. We support factory direct sales, stable bulk supply, free sample testing and professional foaming formula technical guidance to help customers optimize product competitiveness.

Previous : Super High Temp Expandable Microspheres CAS 38742-70-0 High Performance Polymer Lightweight Additive Next : CAS 38742-70-0 Ultra High Temperature Microspheres for Automotive Lightweight Composites

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