Dry Unexpanded Microspheres CAS 38742-70-0 are high-performance polymer foaming agent, equivalent to Expancel DU grade. Supplied as dry unexpanded white powder, the microspheres remain stable during mixing. Upon heating during processing, they expand controllably and form homogeneous closed-cell structures inside plastics and rubber. The product effectively reduces part weight and raw material costs while maintaining mechanical performance and good surface finish. Featuring stable expansion char

Product Detail

Dry Unexpanded Microspheres CAS 38742-70-0 Expancel DU Equivalent Foaming Agent for Polymers

Product Overview

Dry Unexpanded Microspheres CAS 38742-70-0 is a high-performance thermoexpandable foaming agent equivalent to Expancel DU grade. Provided in dry unexpanded white powder form, microspheres maintain stable particle activity at room temperature and will not prematurely expand during blending and feeding. Under proper processing temperature in injection molding, extrusion or rubber vulcanization, microspheres achieve controllable thermal expansion and form evenly distributed closed-cell structures inside polymer matrix. This product efficiently lowers product density and cuts raw material expenditure, while preserving mechanical strength, dimensional stability and smooth surface quality of rubber and plastic finished products. With reliable expansion performance, strong shear resistance and wide formula compatibility, it acts as a cost-effective alternative foaming additive for universal polymer lightweight projects.

Core Features

DU Grade Equivalent Performance

Performance parameters match Expancel DU series, realizing stable lightweight foaming effect. It is an ideal alternative choice to optimize raw material costs without sacrificing product quality.

Dry Unexpanded Powder, Stable Handling

Uniform dry white fine powder with excellent anti-caking and free-flowing properties. Stable during storage and low-temperature mixing, ensuring consistent feeding and repeatable foaming results in continuous mass production.

Controllable Thermal Expansion & Fine Closed Cells

Within the designed temperature range, microspheres expand steadily to generate dense closed cells. Effectively reduce surface sink marks, bubbles and pits for high-quality appearance of molded parts.

Enhanced Shear Resistance

Optimized polymer shell withstands strong shear force from extruder screws and kneaders. Low particle breakage rate prevents uneven foaming and inconsistent density of finished products.

Wide Adaptability for Polymers

Compatible with most thermoplastics and general rubbers, applicable to multiple processing technologies including injection, extrusion and vulcanization. Suitable for diversified lightweight production demands.

Eco-Friendly Physical Foaming Technology

Adopts pure physical thermal expansion principle, no chemical decomposition, low odor and low VOC. Complies with environmental standards for automotive parts, electronic accessories, consumer goods and industrial polymer products.

Product Specifications

Product Name: Dry Unexpanded Microspheres

CAS No: 38742-70-0

Grade Positioning: Expancel DU Equivalent

Appearance: White dry unexpanded fine powder

Product Type: Thermoexpandable foaming agent, polymer lightweight filler

Applicable Materials: Thermoplastics, modified polymers, general rubber materials

Applicable Processes: Injection molding, extrusion, rubber vulcanization

Core Function: Foaming modification, weight reduction, density adjustment, raw material cost optimization

Recommended Dosage: 1.0%–4.0% (Adjust according to lightweight target and processing parameters)

Application Scope

Suitable for lightweight foaming modification of various polymer products. Widely used in plastic injection components, extruded profiles, plastic sheets, modified plastic pellets, foamed rubber seals, shock-absorbing rubber parts and general composite materials. It solves common pain points of solid products such as heavy weight, high material cost and surface defects, covering automobile accessories, building materials, daily consumer goods and general plastic processing industries.

Usage Guide

Mix dry unexpanded microspheres with polymer raw materials uniformly by low-speed stirring at room temperature. Avoid long-time intense shear mixing and high-temperature preheating to prevent particle rupture and premature expansion. Complete thermal expansion and closed-cell foaming under matched processing temperature during molding, extrusion or vulcanization. Adjust microsphere dosage, processing temperature and equipment parameters according to lightweight requirements and surface quality standards. Keep 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 industrial bulk supply and long-distance transportation.

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

Our Advantages

Our dry unexpanded microspheres offer performance comparable to Expancel DU grade with more competitive pricing. Stable expansion ratio and outstanding batch consistency guarantee uniform lightweight effect for rubber and plastic production lines. We support factory direct sales, stable bulk supply, free sample testing and professional foaming formulation technical guidance, helping customers realize high-quality domestic substitution and reduce comprehensive production costs.

Previous : Powder Form Expandable Microspheres CAS 38742-70-0 DU Type Thermoexpandable Blowing Agent Next : DU Series Expandable Microspheres CAS 38742-70-0 Multi-purpose Dry Foaming Agent for Plastics Rubber

Copy product links

Long by picture save/share

Add Successfully

Continue To Visit Inquiry Now