Medium Temperature Expandable Microspheres CAS 38742-70-0 are physical foaming agents specially developed for PVC shoe sole production with a foaming range of 110-160℃. Upon heating, microspheres expand evenly to form fine closed-cell structure inside PVC soles, delivering lightweight performance, soft hand feel and stable dimensional stability. It features moderate foaming temperature, good compatibility with PVC formulations, uniform cell distribution and low shrinkage, ideal for manufacturing

Product Detail

Medium Temperature Expandable Microspheres CAS 38742-70-0 PVC Shoe Sole Foaming Agent 110-160℃

Product Overview

110-160℃ Medium Temperature Expandable Microspheres CAS 38742-70-0 are professional physical foaming agents customized for PVC shoe sole foaming molding. Designed with medium-temperature activation characteristics, the microspheres perfectly match the conventional processing temperature of PVC shoe materials. During heating and molding, the microspheres expand evenly and stably to form uniform, fine and independent closed-cell structures inside PVC soles. It effectively reduces sole density to realize lightweight effect, improves sole softness, flexibility and wearing comfort. Different from traditional chemical foaming agents, this physical foaming microsphere features stable foaming ratio, uniform cell distribution, low shrinkage rate and no residual harmful substances. It is a high-quality foaming modifier widely used in various PVC casual soles, sandal soles and slipper soles.

Core Features

110-160℃ Medium Temperature Foaming: Matches standard PVC shoe sole processing temperature window perfectly. Stable activation and full expansion within the medium temperature range, no insufficient foaming or over-expansion rupture, adapting to mainstream shoe material production lines.

Uniform Closed-Cell Structure: Forms dense and independent closed pores after expansion. The cell size is consistent without hollow holes or uneven bubbles, effectively solving common problems such as rough sole surface and poor flatness caused by traditional foaming.

Lightweight & Comfort Upgrade: Greatly reduces the overall weight of PVC soles, relieves foot pressure and improves walking comfort. The foamed layer has excellent cushioning performance, enhancing the soft and elastic foot feel of finished shoes.

Low Shrinkage & Stable Size: Excellent structural stability after foaming, effectively inhibiting thermal shrinkage and deformation of PVC soles. Ensures stable sole size and high finished product yield, suitable for mass standardized production.

Good PVC System Compatibility: Uniformly dispersed in PVC paste and shoe material formula system without agglomeration or floating powder. Does not affect PVC material toughness, hardness and surface finish, with high production adaptability.

Eco-Friendly Physical Foaming: Pure physical thermal expansion principle, no chemical decomposition, no peculiar smell and low VOC. Safe and environmentally friendly, compliant with footwear material environmental protection standards.

Product Specifications

Product Name: Medium Temperature Expandable Microspheres

CAS No: 38742-70-0

Product Type: Physical Foaming Agent / Shoe Material Functional Additive

Foaming Temperature Range: 110℃–160℃

Appearance: White Ultra-Fine Powder

Applicable Material: PVC shoe sole, PVC foam shoe material, plastic footwear products

Core Function: Lightweight foaming, uniform cell forming, anti-shrinkage, comfort improvement

Recommended Dosage: 1.5%–4.0% (Adjustable according to foaming height and lightweight requirements)

Application Scope

Mainly used for foaming modification and lightweight production of various PVC shoe soles. Widely applicable to PVC casual shoe soles, slipper soles, sandal soles, children shoe soles and other plastic footwear materials. It is also suitable for medium-temperature foaming processing of PVC decorative materials and soft plastic products, widely used in footwear manufacturing and plastic processing industries.

Usage Guide

Add medium-temperature expandable microspheres into PVC shoe material formula during low-speed mixing, and disperse evenly at room temperature. Avoid high-speed shear stirring to prevent microsphere damage and premature foaming. After uniform mixing, perform conventional extrusion, calendering or molding production. Complete stable foaming and pore forming under the processing temperature of 110-160℃. Adjust the addition amount, processing temperature and holding time according to the target foaming degree and sole softness. Keep sealed and moisture-proof during storage and operation.

Packaging & Storage

Packaging: 25kg sealed moisture-proof composite bag with inner PE liner, dust-proof and leak-proof, meeting industrial bulk production and long-distance transportation requirements.

Storage: Store in a dry, cool and ventilated warehouse, keep tightly sealed. Avoid humid environment, direct sunlight and long-term high-temperature accumulation to prevent microsphere caking and spontaneous foaming. The standard shelf life is 12 months under qualified storage conditions.

Our Advantages

Our medium-temperature expandable microspheres feature stable 110-160℃ foaming interval, consistent batch expansion ratio and excellent PVC system adaptability. The product can stably prepare lightweight, soft and low-shrinkage PVC shoe soles with delicate and uniform pore structure, effectively reducing defective rate. We support factory direct sales, long-term stable bulk supply, free sample testing and professional shoe material formula technical support, helping footwear manufacturers reduce costs and improve product market competitiveness.

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Jishengya Technology

Shenzhen Jishengya Technology Co., Ltd. is located in Shenzhen, a special economic zone, and is a comprehensive technology enterprise integrating independent R&D, production and sales.