Powder Form Expandable Microspheres CAS 38742-70-0 (DU Type) are thermoexpandable physical blowing agents. Provided as dry unexpanded powder, the microspheres remain stable during mixing. When heated in processing, they expand controllably to form uniform closed-cell structures inside rubber and plastic substrates. This product effectively reduces product density and saves raw material costs while maintaining good mechanical performance and smooth surface finish of finished goods. With excellent

Product Detail

Powder Form Expandable Microspheres CAS 38742-70-0 DU Type Thermoexpandable Blowing Agent

Product Overview

Powder Form Expandable Microspheres CAS 38742-70-0 (DU Type) are high-performance thermoexpandable physical blowing agents. Supplied as dry unexpanded powder, microspheres maintain stable particle state under normal temperature during mixing and feeding without premature expansion. When reaching the required processing temperature in extrusion, injection molding or rubber vulcanization, the microspheres expand controllably and form evenly distributed closed-cell structures within polymer matrix. It can effectively lower product density and reduce raw material costs while retaining mechanical properties, dimensional stability and excellent surface quality of rubber and plastic finished products. Featuring good powder fluidity, stable thermal expansion performance and broad material compatibility, DU Type microspheres are cost-effective blowing agents for general polymer lightweight foaming projects.

Core Features

Dry Powder Unexpanded State, Excellent Flowability

Uniform dry white powder with good anti-caking performance. Easy to blend evenly with rubber and plastic raw materials, guaranteeing consistent feeding during continuous production.

Controllable Thermal Expansion Performance

Stable expansion temperature range, predictable expansion ratio. Form fine and dense closed cells after heating, delivering steady lightweight effect for mass production.

Wide Compatibility with Rubber & Plastics

Adaptable to most thermoplastics and general rubber materials. Suitable for multiple molding technologies including injection, extrusion and vulcanization.

Optimized Shell Structure, Strong Shear Resistance

Resist screw and kneading shear force in processing, low particle breakage rate. Effectively avoid uneven foaming and local density differences of finished products.

Reduce Raw Material Consumption

Significant weight reduction can be achieved with low addition dosage. Help manufacturers cut production costs without obvious loss of product rigidity and impact resistance.

Environment-Friendly Physical Foaming

Adopt pure physical thermal expansion mechanism, no chemical decomposition, low odor and low VOC. Meet environmental requirements for consumer goods, auto accessories and industrial polymer products.

Product Specifications

Product Name: Powder Form Expandable Microspheres

Grade: DU Type

CAS No: 38742-70-0

Appearance: White dry unexpanded fine powder

Product Type: Thermoexpandable physical blowing 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 saving

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

Application Scope

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

Usage Guide

Mix DU Type powder 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 Type powder thermoexpandable microspheres feature stable activity and reliable batch consistency. It can be flexibly applied to rubber and plastic production lines to realize uniform closed-cell lightweight foaming. We support factory direct sales, stable bulk supply, free sample testing and professional foaming formulation technical guidance to help customers optimize costs and improve product competitiveness.

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