Un expanded Dry Expandable Microspheres CAS 38742-70-0 Injection Molding Physical Foaming Agent
Unexpanded Dry Expandable Microspheres CAS 38742-70-0 are high-performance physical foaming agents tailored for plastic injection molding. Supplied as dry unexpanded powder, the microspheres remain stable during material mixing. They achieve controllable thermal expansion inside injection molds and form uniform closed-cell structures, effectively lowering part weight and cutting raw material costs. Meanwhile, they maintain favorable mechanical properties and excellent surface finish of molded pl
Unexpanded Dry Expandable Microspheres CAS 38742-70-0 Injection Molding Physical Foaming Agent
Product Overview
Unexpanded Dry Expandable Microspheres CAS 38742-70-0 are high-performance physical foaming agents specially optimized for plastic injection molding. Provided in dry unexpanded powder form, the microspheres maintain stable particle status during room-temperature mixing and feeding without premature foaming. When subjected to molding temperature inside injection molds, they undergo controllable thermal expansion and create evenly distributed closed-cell structures within plastic matrix. The material effectively reduces component weight and raw material consumption while preserving mechanical performance, dimensional accuracy and premium surface quality of injection molded parts. With outstanding powder flowability, reliable shear resistance and consistent foaming repeatability, this product serves as an ideal lightweight functional additive for various injection molding production lines.
Core Features
Dry Unexpanded Powder, Stable Storage & FeedingDry unexpanded microspheres feature excellent anti-caking and free-flowing characteristics. No spontaneous expansion occurs during storage and blending, ensuring stable feeding and consistent foaming effect in continuous injection molding production.
Customized for Injection Molding ProcessAdaptable to temperature and shear conditions of injection molding. Microspheres expand steadily inside molds, avoiding inconsistent foaming caused by screw shearing, suitable for mass automated injection production.
Uniform Closed-Cell Structure, Smooth SurfaceForms fine and dense closed cells after expansion. Effectively eliminates surface bubbles, sink marks and flow marks, delivering smooth appearance for precision injection plastic products.
Strong Shear Resistance, Low Particle Breakage RateOptimized shell structure withstands shear force from injection screws. Less particle breakage prevents uneven density and local foaming defects of finished parts.
Lightweight Effect & Cost OptimizationAchieves obvious weight reduction with low addition amount. It cuts material costs without significant loss of rigidity, impact resistance and other basic mechanical properties of plastic components.
Environment-Friendly Physical Foaming TechnologyWorks on physical thermal expansion principle, no chemical decomposition, low odor and low VOC. Complies with environmental standards for automotive plastic parts, electronic housings and daily plastic products.
Product Specifications
Product Name: Unexpanded Dry Expandable MicrospheresCAS No: 38742-70-0Appearance: White dry unexpanded fine powderProduct Type: Physical Foaming Agent, Lightweight Polymer FillerApplicable Process: Plastic injection moldingApplicable Materials: Thermoplastics for injection moldingCore Function: Lightweight modification, density reduction, sink mark elimination, raw material cost savingRecommended Dosage: 1.0%–3.8% (Adjust based on lightweight target and molding process)
Application Scope
Suitable for lightweight foaming modification of various injection molding plastics. Widely applied in automotive interior plastic parts, electronic equipment housings, household plastic accessories, industrial injection structural parts, toy plastic components and other products. It solves common problems including heavy weight, high material cost and surface sink marks of solid injection parts, covering automotive, electronics, consumer goods and industrial plastic processing industries.
Usage Guide
Mix unexpanded dry expandable microspheres with plastic pellets evenly via low-speed stirring under room temperature. Avoid intense long-time shear mixing and high-temperature preheating to prevent particle rupture and premature expansion. Transfer blended materials to injection molding machine, and complete controllable thermal foaming inside molds under matched processing temperature. Adjust microsphere dosage, barrel temperature, injection speed and holding pressure according to lightweight requirements and surface standards. Keep raw materials 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 for bulk industrial shipment and long-distance transport.Storage: Store in dry, cool and ventilated warehouse. Keep containers tightly sealed. Prevent direct sunlight, high-temperature stacking and humid environment to avoid caking and spontaneous foaming. Standard shelf life reaches 12 months under proper storage conditions.
Our Advantages
Our unexpanded dry expandable microspheres are tailored for injection molding scenarios with stable expansion ratio and excellent batch consistency. Finished injection products feature uniform cell distribution, smooth surface and stable dimensional performance, balancing lightweight effect and production cost. We provide factory direct sales, stable bulk supply, free sample testing and professional injection foaming formula technical support to help customers enhance product competitiveness.
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