CAS 38742-70-0 Dry Un expanded Polymer Microspheres General Purpose Foaming Additive
CAS 38742-70-0 Dry Unexpanded Polymer Microspheres are versatile general-purpose physical foaming additives. Supplied as dry unexpanded powder, the microspheres stay stable during raw material blending. Upon heating in processing, they expand controllably and form uniform closed-cell structures inside polymer substrates. The product effectively reduces component density and cuts raw material costs while retaining mechanical properties and surface finish of finished polymer goods. With good flowa
CAS 38742-70-0 Dry Unexpanded Polymer Microspheres General Purpose Foaming Additive
Product Overview
CAS 38742-70-0 Dry Unexpanded Polymer Microspheres are multi-purpose physical foaming additives developed for universal polymer lightweight modification. Provided in dry unexpanded powder form, microspheres maintain stable particle state at room temperature without premature expansion during mixing and feeding. When heated under molding conditions, they achieve controllable thermal expansion and generate evenly distributed closed-cell structures inside polymer matrix. This additive effectively lowers product density and reduces raw material consumption, while preserving mechanical strength, dimensional stability and good surface quality of finished polymer products. Featuring excellent powder fluidity, consistent expansion performance and broad compatibility with multiple polymer systems, it serves as a cost-effective foaming additive for various general foaming scenarios.
Core Features
Dry Unexpanded Powder, Stable Storage PerformanceDry unexpanded polymer microspheres exhibit outstanding anti-caking and free-flowing properties. No spontaneous foaming occurs during storage and low-temperature mixing, guaranteeing stable feeding and repeatable foaming effect in continuous mass production.
Universal Formula with Wide Material CompatibilitySuitable for most thermoplastics, general rubbers and conventional composite materials. Compatible with multiple processing techniques including injection molding, extrusion and vulcanization, meeting diversified lightweight production demands.
Controllable Expansion & Uniform Closed-Cell StructureMicrospheres expand steadily under appropriate processing temperature to form fine, dense closed cells. Effectively mitigate surface bubbles, pits and uneven foaming defects for clean appearance of finished parts.
Good Shear Resistance & Low Particle BreakageOptimized shell structure withstands mechanical shear force during kneading, extrusion and injection. Low breakage rate avoids inconsistent density and local foaming difference of final products.
Cost-Efficient Lightweight SolutionObvious weight reduction can be realized with low addition dosage. It helps enterprises cut material costs without significant attenuation of rigidity, impact resistance and other basic physical indicators.
Eco-Friendly Physical Foaming TechnologyWorks on pure physical thermal expansion principle without chemical decomposition. Low odor and low VOC, complying with environmental standards for consumer goods, industrial accessories and general polymer products.
Product Specifications
Product Name: Dry Unexpanded Polymer MicrospheresCAS No: 38742-70-0Appearance: White dry unexpanded fine powderProduct Type: General Purpose Physical Foaming Additive, Lightweight Functional FillerApplicable Materials: Thermoplastics, conventional rubber, common composite materialsApplicable Processes: Injection molding, extrusion, rubber vulcanizationCore Function: Foaming modification, density reduction, lightweight optimization, raw material cost savingRecommended Dosage: 1.0%–4.0% (Adjust based on lightweight target and processing parameters)
Application Scope
Widely adopted for lightweight foaming modification of polymer products. Applicable to plastic injection parts, extruded profiles, sheets, modified plastic pellets, foamed rubber sealing parts, shock-absorbing rubber components and ordinary composite decorative materials. It solves typical problems of solid products such as heavy weight, high material cost and poor dimensional stability, extensively applied in building materials, daily consumer goods, auto accessories and general plastic processing industries.
Usage Guide
Mix dry unexpanded polymer 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 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 polymer microspheres deliver stable expansion ratio and reliable batch consistency. As universal foaming additive, it balances performance and cost and can be flexibly used in rubber and plastic production lines. We support factory direct sales, stable bulk supply, free sample testing and professional foaming formulation technical guidance, helping customers optimize production costs and improve product competitiveness.
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