DU Series Expandable Microspheres CAS 38742-70-0 are multi-purpose dry thermally expandable foaming agents suitable for plastics and rubber. In dry unexpanded powder form, the microspheres keep stable during blending and avoid premature expansion. Upon heating under processing temperature, they expand controllably and create evenly distributed closed-cell structures inside polymer matrix. The product effectively reduces part weight and raw material consumption while retaining mechanical performa

Product Detail

DU Series Expandable Microspheres CAS 38742-70-0 Multi-purpose Dry Foaming Agent for Plastics Rubber

Product Overview

DU Series Expandable Microspheres CAS 38742-70-0 are multi-purpose dry thermoexpandable foaming agents designed for plastics and rubber industries. Available in dry unexpanded white powder form, microspheres maintain stable particle activity at ambient temperature and will not undergo premature expansion during mixing and feeding. When heated to the appropriate temperature in injection molding, extrusion or rubber vulcanization processes, microspheres achieve controllable thermal expansion and form evenly distributed closed-cell structures within polymer matrix. The product effectively reduces product density and raw material consumption, while retaining mechanical strength, dimensional stability and smooth surface finish of rubber and plastic finished products. With excellent powder flowability, reliable shear resistance and extensive formulation compatibility, DU Series expandable microspheres serve as versatile lightweight additives for various polymer foaming projects.

Core Features

Multi-purpose Formula for Plastics & Rubber

Universal formulation fits most thermoplastics and general rubbers. Compatible with injection molding, extrusion, vulcanization and other molding processes to meet diversified lightweight production demands.

Dry Unexpanded Powder with Good Flowability

Uniform white fine powder featuring excellent anti-caking performance. Easy to blend evenly with polymer raw materials, ensuring stable feeding and consistent foaming effect in continuous mass production.

Controllable Thermal Expansion & Uniform Closed Cells

Microspheres expand steadily within the working temperature range and form fine dense closed cells. Effectively mitigate surface sink marks, bubbles and pits to obtain high-quality product appearance.

Strong Shear Resistance & Low Breakage Rate

Optimized shell structure can withstand strong shear force from extruders and kneaders. Less particle breakage avoids uneven foaming and inconsistent density of finished products.

Significant Cost Saving on Raw Materials

Obvious lightweight effect can be achieved at low addition dosage. Help manufacturers cut production costs without obvious decline in rigidity, impact resistance and other key physical properties.

Environment-friendly Physical Foaming Technology

Based on physical thermal expansion mechanism without chemical decomposition. Low odor and low VOC, conforming to environmental requirements for auto parts, electronic housings, daily consumer goods and industrial polymer products.

Product Specifications

Product Name: DU Series Expandable Microspheres

CAS No: 38742-70-0

Appearance: White dry unexpanded fine powder

Product Type: Thermoexpandable foaming agent, lightweight filler

Applicable Materials: General thermoplastics, modified polymers, various conventional rubbers

Applicable Processes: Injection molding, extrusion, rubber vulcanization molding

Core Function: Foaming modification, density reduction, lightweight optimization, raw material cost control

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

Application Scope

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

Usage Guide

Mix DU Series expandable microspheres with polymer raw materials uniformly via 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 standards and surface quality requirements. 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 is 12 months under proper storage conditions.

Our Advantages

Our DU Series expandable microspheres possess stable expansion performance and outstanding batch consistency. Applicable flexibly to both plastic and rubber production lines to achieve uniform closed-cell lightweight foaming. We support factory direct sales, stable bulk supply, free sample testing and professional foaming formulation technical guidance, helping customers optimize comprehensive production costs and enhance product market competitiveness。

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