Dry Unexpanded Expandable Microspheres CAS 38742-70-0 DU Grade General Purpose Foaming Agent Powder
Dry Unexpanded Expandable Microspheres CAS 38742-70-0 (DU Grade) are free-flowing dry powder general-purpose physical foaming agents. These unexpanded microspheres expand upon heating to form uniform closed-cell structures inside plastics, rubbers and composite materials. They deliver reliable lightweight effect and cut raw material costs while maintaining balanced mechanical performance and dimensional stability of finished products. Featuring easy dispersion, stable expansion characteristics a
Dry Unexpanded Expandable Microspheres CAS 38742-70-0 DU Grade General Purpose Foaming Agent Powder
Product Overview
Dry Unexpanded Expandable Microspheres CAS 38742-70-0 (DU Grade) are general-purpose, free-flowing dry powder physical foaming agents. This unexpanded microsphere grade is specially formulated for universal foaming and lightweight modification across plastics, rubber and composite materials. Supplied in complete unexpanded dry particle state, the microspheres remain stable at room temperature and expand controllably under targeted heating processing. They create uniform, independent closed-cell structures inside polymer matrix, effectively reducing product density, lowering material consumption and optimizing production costs. With excellent dispersibility, stable expansion performance and ultra-wide formula compatibility, DU grade microspheres serve as cost-effective, multi-scene lightweight fillers for general and industrial foaming applications.
Core Features
100% Dry Unexpanded State & Long Shelf Stability
Supplied in pure dry unexpanded powder form with no pre-expansion. Particles remain stable under normal storage and room-temperature mixing, avoiding premature foaming and ensuring long-term usability and consistent batch performance.
Universal General-Purpose Foaming Performance
Designed for wide-range general foaming scenarios. Adapts to conventional molding temperatures of most thermoplastics and rubber materials, delivering stable and repeatable lightweight foaming effects for mass production.
Excellent Free-Flowing & Dispersion Property
Ultra-fine dry powder features good fluidity and anti-caking performance. Disperses uniformly in resin and rubber systems without agglomeration, ensuring even foaming distribution on finished products.
Cost-Effective Lightweight Solution
Realizes efficient weight reduction and density optimization with low addition dosage. Greatly reduces raw material costs while maintaining basic mechanical strength, surface quality and dimensional stability of polymer products.
Low Defect Rate & Smooth Surface Finish
Reasonable particle toughness resists conventional shear force during mixing and molding. Effectively avoids bubbles, pits and uneven foaming, providing smooth and clean product appearance.
Eco-Friendly Physical Foaming System
Pure physical thermal expansion principle, no chemical decomposition, low VOC and low odor. Safe and environmentally friendly, compliant with daily consumer goods, industrial and general automotive material standards.
Product Specifications
Product Name: Dry Unexpanded Expandable Microspheres
Grade: DU General Purpose Grade
CAS No: 38742-70-0
Appearance: White Dry Ultra-Fine Powder (Unexpanded)
Product Type: General Purpose Physical Foaming Agent, Lightweight Functional Filler
Processing Method: Thermal expansion during standard molding
Applicable Materials: General plastics, modified polymers, conventional rubber, common composite materials
Core Function: Polymer foaming, density reduction, lightweight modification, cost optimization
Recommended Dosage: 1.0%–4.0% (Adjust according to lightweight requirements)
Application Scope
Widely used for general lightweight foaming modification of plastics, rubber and composite materials. Ideal for daily plastic products, industrial ordinary plastic parts, general rubber foaming products, modified plastic pellets, packaging lightweight materials and common decorative composite components. It is a versatile and cost-effective foaming additive suitable for most conventional polymer lightweight projects.
Usage Guide
Mix DU grade dry unexpanded microspheres evenly with polymer raw materials through low-speed room-temperature stirring. Avoid high-intensity long-time shear and overheating pretreatment to prevent particle damage and premature expansion. Complete uniform thermal foaming during standard injection, extrusion or vulcanization molding. Adjust microsphere dosage, molding temperature and processing parameters according to target lightweight ratio and surface quality demands. Keep sealed and moisture-proof during storage and production.
Packaging & Storage
Packaging: 25kg PE inner sealed composite bag, dust-proof, moisture-proof and leak-proof for industrial bulk supply.
Storage: Store in dry, cool and ventilated environment. Keep tightly sealed, avoid humidity, high temperature and direct sunlight. Standard shelf life is 12 months under proper conditions.
Our Advantages
Our DU grade dry unexpanded expandable microspheres feature stable particle activity, excellent free-flowing property and consistent batch quality. As general-purpose foaming powder, it balances performance and cost perfectly, suitable for large-scale conventional lightweight production. We support factory direct sales, stable bulk supply, free sample testing and professional foaming formula guidance to help customers reduce costs and improve product competitiveness.
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