TPR Sole Foaming Microspheres CAS 38742-70-0 Medium Temperature Expandable Polymer Microspheres
TPR Sole Foaming Microspheres CAS 38742-70-0 are medium temperature expandable polymer microspheres designed for TPR shoe sole production. Upon heating, microspheres expand evenly to form fine closed-cell structure inside TPR materials. It effectively lowers sole density to achieve lightweight, delivers soft hand feel and stable dimensional performance. Featuring good compatibility with TPR formulas, uniform cell distribution and low shrinkage, it is ideal foaming additive for slipper, casual sh
TPR Sole Foaming Microspheres CAS 38742-70-0 Medium Temperature Expandable Polymer Microspheres
Product Overview
CAS 38742-70-0 Medium Temperature Expandable Polymer Microspheres are professional physical foaming agents exclusively developed for TPR shoe sole foaming and lightweight modification. Perfectly matching the medium-temperature molding and processing temperature window of TPR materials, the microspheres expand evenly and stably after heating. They form dense, fine and independent closed-cell structures inside TPR soles, which effectively reduces the overall density of shoe soles and achieves lightweight effects. This product optimizes the soft hand feel, walking comfort and cushioning performance of TPR soles, while maintaining excellent dimensional stability with low shrinkage rate. Featuring outstanding compatibility with various TPR formula systems, uniform cell formation and stable batch performance, it is an ideal functional additive for mass production of high-quality lightweight TPR shoe soles.
Core Features
Matched Medium Temperature Foaming: Customized foaming temperature perfectly adapts to conventional TPR sole extrusion and molding processes. Microspheres expand fully and uniformly without rupture or insufficient foaming, ensuring stable foaming effect in continuous industrial production.
Superior Lightweight Performance: Effectively reduces TPR sole density and overall weight, relieves foot pressure and greatly improves wearing comfort. It cuts raw material consumption without damaging the basic mechanical properties of TPR materials.
Uniform Fine Closed-Cell Structure: Forms regular and dense closed pores after expansion. The cell size is consistent without hollow holes, bubble cracks or uneven texture, making TPR sole surface smooth and delicate with stable quality.
Low Shrinkage & High Dimensional Stability: The foamed microsphere structure has strong shape retention. It effectively inhibits thermal shrinkage and deformation of TPR soles during molding and use, improves product yield and ensures consistent sole size and appearance.
Excellent TPR System Compatibility: Ultra-fine polymer microsphere powder disperses evenly in TPR granules and melt systems without agglomeration or precipitation. It will not affect the toughness, hardness, abrasion resistance and bonding performance of TPR soles.
Eco-Friendly Physical Foaming: Adopts pure physical thermal expansion principle, no chemical decomposition, no harmful residues, low odor and low VOC. Compliant with environmental protection and safety standards for daily footwear products.
Product Specifications
Product Name: Medium Temperature Expandable Polymer Microspheres
CAS No: 38742-70-0
Product Type: TPR Shoe Sole Physical Foaming Agent / Lightweight Filler
Foaming Temperature Range: 110℃–160℃
Appearance: White Ultra-Fine Powder
Applicable Material: TPR thermoplastic rubber, TPR composite sole materials
Core Function: TPR sole foaming, density reduction, lightweight modification, comfort improvement, anti-shrinkage
Recommended Dosage: 1.5%–4.0% (Adjustable according to foaming height and lightweight requirements)
Application Scope
Specially used for foaming lightweight processing of all kinds of TPR shoe soles. Widely applicable to TPR casual shoe soles, slipper soles, sandal soles, children shoe soles and other thermoplastic rubber footwear products. It solves the problems of heavy weight, hard hand feel and poor cushioning of traditional solid TPR soles, and is widely used in footwear manufacturing industry.
Usage Guide
Add expandable microspheres into TPR raw materials during low-speed mixing at room temperature, and disperse evenly slowly. Avoid high-speed shear stirring and ultra-high temperature preheating to prevent microsphere damage and premature foaming. After uniform mixing, carry out conventional TPR extrusion, calendering and molding production. Complete stable thermal expansion and closed-cell foaming under standard TPR processing temperature. Adjust the addition amount, molding temperature and holding time appropriately according to the target lightweight degree and sole softness. Keep 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, meeting the requirements of industrial bulk supply and long-distance transportation.
Storage: Store in a dry, cool and ventilated warehouse, keep tightly sealed at all times. Avoid direct sunlight, high-temperature accumulation and humid environment to prevent microsphere caking and spontaneous foaming. The standard shelf life is 12 months under qualified storage conditions.
Our Advantages
Our medium temperature expandable polymer microspheres feature accurate and stable foaming temperature window, uniform expansion ratio and excellent adaptability to TPR rubber systems. The product can stably produce lightweight, soft, low-shrinkage TPR foamed soles with delicate and uniform pore structure, effectively reducing defective rate and production cost. We support factory direct sales, long-term stable bulk supply, free sample testing and professional TPR sole formula technical support, helping footwear manufacturers improve product quality and market competitiveness.
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