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Brand: WSD CHEMICAL
Product Name: WSD Expansible Thermoplastic Microspheres
WSD Expandable Microspheres are advanced thermoplastic hollow microsphere foaming materials. Each tiny microsphere consists of a tough thermoplastic polymer shell encapsulating a special low-boiling point blowing agent. When heated to the activation temperature, the internal blowing agent vaporizes, rapidly expanding the volume of the microsphere to dozens of times its original size. This product enables precise, controllable foaming without complex equipment, widely recognized across industries for lightweighting, texture modification and density reduction.
Item | Index |
Appearance | White free-flowing fine powder |
Unexpanded Particle Size D50 | 10–45 μm |
Expansion Starting Temperature | 80–150°C |
Maximum Expansion Temperature | 140–210°C |
Maximum Volume Expansion Ratio | 30–60 times |
True Density (Unexpanded) | 1000–1200 kg/m³ |
True Density (Fully Expanded) | 20–50 kg/m³ |
Shell Material | Acrylonitrile copolymer |
· Ultra-high expansion ratio, significantly reduces product density and achieves remarkable lightweight effect
· Closed-cell structure after expansion, uniform bubble size, no large holes or uneven foaming
· Precise activation temperature control, no premature decomposition or sudden gas release
· No special high-pressure foaming equipment required, easy to integrate into existing production lines
· Excellent solvent resistance and thermal stability, no residue, no odor, no pollution to finished products
· Good dispersibility in coatings, inks, plastics, rubber and adhesives
· Multiple temperature grades available, covering low-temperature to high-temperature processing scenarios
PVC & Thermoplastic Foaming
Used in PVC profiles, sheets, WPC boards and injection molded products to achieve uniform and fine closed-cell foam structure, reduce product weight and improve surface smoothness.
Water-Based Printing Inks & Textile Printing
Added to water-based inks, wallpaper coatings and textile printing pastes to form three-dimensional raised texture, velvet effect and matte surface, enhancing product added value.
Leather & Artificial Leather
Applied in leather repair mortar, base coating and top coating of artificial leather to improve filling performance, reduce shrinkage and obtain soft and delicate hand feel.
Adhesives & Sealants
Added to sealants and adhesives to reduce density, improve dimensional stability, reduce shrinkage and enhance cushioning performance.
Explosive Sensitizer
Used as high-efficiency sensitizer in industrial explosives to form uniform and controllable pore structure, significantly improving explosion performance and economic benefit.
Cultural & Educational Toys & Craft Materials
Mixed in air-drying clay, plasticine and craft mud to obtain ultra-light, soft and comfortable hand feel.
Coatings & Construction Materials
Used in architectural coatings, putty and thermal insulation materials to reduce product density, improve thermal insulation and sound absorption performance.
Suggested addition dosage: 0.5–5.0 phr, adjust according to target density and expansion effect requirements
For high-expansion lightweight scenarios, the dosage can be increased to 5–10 phr after small-scale testing
Avoid high-shear mixing at too high temperature in advance, to prevent microspheres from expanding prematurely
It is recommended to add in the later mixing stage at a temperature lower than the expansion starting temperature, and perform heating foaming after uniform dispersion
· Standard packaging: 20kg / 25kg cardboard drum or moisture-proof kraft paper bag
· Store in cool, dry and ventilated indoor warehouse, storage temperature should not exceed 30 °C,Keep away from heat sources, open flames and strong oxidizing substances
· The shelf life under recommended storage conditions is 12 months
· Complete MSDS and safety operation manual are available upon request
With over 20 years of in-depth accumulation in polymer foaming materials, WSD CHEMICAL provides global customers with full-series expandable microspheres that match classic Expancel grades. We not only supply stable quality products, but also provide professional technical consultation, process optimization suggestions and foaming effect debugging services, helping you quickly achieve precise controllable lightweight and texture modification effects.
1.Good mechanical properties
2.Excellent elasticity
3,Excellent foaming performance
4.Environmental protection performance