Archive for the ‘Microspheres’ Category

China glass microsphere, has been around for ten years or so, but it really is industrial production and the use of only a short five or six years or so, but on their current market situation, the global situation at large, there the substantial needs, including with the insulation materials, coatings and various other high-end military and civilian products.

Cenospheres products are divided into three categories: white hollow glass beads; one is floating beads; there is a class resin beads. Each category is divided into a variety of specifications of products, used in different fields. In terms of market applications cenospheres product point of view, now more mature customer base should be foreign, domestic large enterprises started relatively late, the vast majority have not come into contact with such products.But also the most important point, foreign companies and Porter company 3M hollow glass beads, due to price and delivery time, most domestic customers which can only wait and see situation, some of this is already in use users of the product are also trying to find 3M and Potter’s beads alternatives.Domestic producers of beads confined to limit the production technology and equipment, has been unable to provide a high-performance alternative to the market vacuum, some companies began to fish in a very poor product and low market price to disrupt the market. Judging hollow glass beads application situation continues to forge ahead, in fact, exactly the opposite, due to defects in each of their own technology, making cenospheres product quality is uneven, with greatly reduced the quality of their products, but affected the hollow glass microspheres Pearl market expansion.

Reflective glass microspheres is a tiny glass sphere glass sand particles as raw material formed by high-temperature melting. Reflective glass microsphere for road marking as the reflective material to improve road marking paint Retroreflective performance, improve traffic safety at night, has to be determined for national transport sector.When driving at night, the lights shining on the road signs with glassmicrosphere, can lights and parallel light is reflected back, never make drivers see the way forward to improve traffic safety at night. Now, reflective glass microspheres have become a road safety products reflective material can not be replaced.
This article comes from DOC88

Bioactive glass is a promising osteoconductive silica-based biomaterial for guidance of new bone growth. On the basis of several in vitro studies, the material appears able to promote osteoblast functions. In our in vivo study, the osteopromotive effect of bioactive glass microspheres seemed to surpass the osteoinductive action of direct adenovirus-mediated human bone morphogenetic protein 2 (BMP-2) gene transfer in a noncritical size bone defect model. The current study was initiated to elucidate the molecular mechanism behind bioactive glass action with or without adjunct BMP-2 gene transfer. A standardized bone defect of the rat tibia was filled with bioactive glass microspheres and injected with adenovirus carrying the human BMP-2 gene (RAdBMP-2). Control defects were left empty or filled with bioactive glass microspheres with injection of adenovirus carrying the lacZ reporter gene or saline. Quantitative polymerase chain reaction confirmed the expression of the transferred human BMP-2 gene at the defect area at 4 days, but not in intact reference tissues. Bone matrix components (collagens I, II, and III, osteocalcin, osteonectin, and osteopontin) and resorption markers (cathepsin K and MMP-9), determined by Northern analysis, showed a completely different pattern of gene expression in defects filled with bioactive glass compared with control defects left to heal without filling. Bioactive glass induced a long-lasting production of bone matrix with concurrent upregulation of osteoclastic markers, a sign of high bone turnover. Combining RAdBMP-2 gene transfer with bioactive glass decelerated the high turnover, but did not influence the balance of synthesis and resorption. This molecular analysis confirmed not only the highly osteopromotive effect of bioactive glass microspheres, but also the accelerated rate of new bone resorption on its surface. At least in noncritical size defects this impact of bioactive glass seems to saturate new bone formation on its surface and thereby overshadow the effect of BMP-2 gene transfer.

From: researchgate

The product, made of borosilicate, is hollow sphere which grain size is 10-250micron, wall-thickness 1-2 micron. It has much merit, such as light, low heat conductivity, higher mechanical strength and excellent chemical stability. Its surface was treated by the special way and the products are dispersed very easily in organic materials such as resin.Hollow glass microsphere are widely used in composite materials such as FRP, man made marble and man made agate. It can decrease the weight of the composite materials and the composite materials have excellent performance of sound insulation and heat preservation, and it can improve the mechanical performance of the composite materials such as strengthened rigidity, enhanced anti-impact property, excellent anti-breaking property and re-processing function.Hollow glass beads are applied in a wide range of fields such as aviation, space flight, new bullet train, luxurious yacht, adiabatic dope, bowing balls, in which they play a distinctive role.Hollow glass micro sphere is the excellent sensitized of emulsion explosive. It can improve the detonation property of emulsion explosive and prolong the shelf period of emulsion explosive. When used in the resin putty, hollow glass microsphere can increase the volume of resin putty, improve its polishing function.


Someone is moving its glass microspheres into greenhouse films for the agricultural market.

Using microspheres can allow producers to make more amounts of low density and linear low density film with the same amount of resin, application development engineer Fernando Cervantes said at Plastimagen 2016 in Mexico City.

Microspheres also can provide whiteness to films, allowing for the replacement of titanium dioxide, he added. The materials also can spread light over a greater area, which helps plant growth.

Development of microsphere films began last year in the U.S. St, Paul, Minn.-based they now is working with film producers on the new application.


In Mexico, they have operated an innovation center in San Luis Potosi since 2013. Overall, they have done business in Mexico since 1947 and employs a total of 7,000 there.

They microspheres were used in body panels that were honored in November by the Society of Plastics Engineers’ automotive division. The award went to General Motors Co. for body panels made using composite material from Continental Structural Plastics. Auburn Hills, Mich.-based CSP replaced calcium carbonate with hollow glass microspheres and a proprietary surface treatment to achieve mass reduction of at least 28 percent vs. standard materials.

In 2015, they posted sales of just over $30 billion. Its products include adhesives, abrasives and specialty materials.


Glass microsphere is a tiny sphere with high ball-type rate. Its ball-bearing effect can improve its mobility and reduce the viscosity and internal stress of resin mixture.

Potential Applications:
Light cement slurry, Paint and coating, Putty, Adhesives, Sport Appliances, Floating materials
Polyurethane, Artificial Marble, Epoxy Tooling Board, Ceramic Materials, Emulsion explosives
Synthetic foam.










FROM:Anhui Elite Industrial Co., Ltd.

Researchers from Carnegie Melon University and Karlsruhe Institute of Technology have recently published an article in Journal of the Royal Societytitled Staying Sticky: Contact Self-Cleaning of Gecko-Inspired Adhesives that presents the first gecko-inspired adhesive that matches both the attachment and self-cleaning properties of gecko’s foot on a smooth surface.

Using glass microspheres to simulate contamination the scientists created a synthetic gecko adhesive that could self-clean and recover lost adhesion. Real world applications of self-cleaning adhesives are reusable adhesive tapes, clothing, medical adhesives (bandages) and pick-and-place robots, among others.Micro_and_nano_view_of_geckos_toe1-300x203

Everyday challenge with traditional adhesives is that they loose their stickiness once contaminated. Geckos have been intriguing researchers for decades because of their unique and striking capability to maintain the stickiness of their toes through contact self-cleaning. They can travel up the walls and ceilings in a wide variety of “dirty” settings retaining adhesion.

Upon experimentation, scientists discovered that the critical variable is the relative size of microfibers that make up the adhesive compared to the diameter of contaminant particles. Glass microspheres were used in diameters from 3 to 215microns. Glass microspheres were packed in air and used as supplied. Contamination of the samples was achieved by brining each sample in contact with a monolayer of glass microspheres with specific speeds under predetermined compressive loads. The cleaning process involved a load-drag-unload procedure.

Best self-cleaning results were obtained with the largest contaminants (glass microspheres), with the size of the adhesive fiber much smaller than the contaminating particle. This information is important to know when designing self-cleaning adhesives—make the adhesive fibers much smaller for improved adhesion recovery. This cleaning mechanism requires unloading particles by dragging. The other extreme of contaminating microspheres being much smaller than the adhesive fibers has advantages in some situations, even though it works by a different mechanism. Smaller microspheres tended to become embedded into the adhesive material. Particle embedding is a temporary cleaning process but might be sufficient in some applications.


They offers unique capability to manufacture microspheres and micro-particles with partial coatings and dual functionality. Currently half-shell or hemispherical coatings can be applied to any sphere (glass, polymer, ceramic) in sizes 45 micron in diameter on up to 1mm and higher. Hemispherical coatings of less than 1 micron with tolerances as low as 0.25 micron have been routinely demonstrated. Color combinations are truly unlimited. White, black, silver, blue, green, red, yellow, brown, purple in both fluorescent and non-fluorescent have been made. Sphericity of greater than 90% and custom particle size ranges are offered.

The custom coating capability offers customers the ability to create fluorescent glass micro-spheres of the specific size and emission/excitation needed. As the micro spheres and coating are solvent resistant they work ideally as fluorescent tracers or highly visible targets. We can overcoat clear glass or silver coated glass for the effect needed.

For those needing very large Spheres can coat spheres of 1 mm and larger.

The microparticles are now available as either dry powder or in a dielectric oil.

From:Microspheres Online

Glass microspheres are microscopic spheres of glass manufactured for a wide variety of uses in research,medicine, consumer goods and various industries. Glass microspheres are usually between 1 to 1000 micrometers in diameter, although the sizes can range from 100 nanometers to 5 millimeters in diameter. Hollow glass microspheres, sometimes termed microballoons, or glass bubbles have diameters ranging from 10 to 300 micrometers.

Hollow spheres are used as a lightweight filler in composite materials such as syntactic foam and lightweight concrete. Microballoons give syntactic foam its light weight, low thermal conductivity, and a resistance to compressive stress that far exceeds that of other foams. These properties are exploited in the hulls of submersibles and deep-sea oil drilling equipment, where other types of foam would implode. Hollow spheres of other materials create syntactic foams with different properties, for example ceramic balloons can make a light syntactic aluminium foam.

Hollow spheres also have uses ranging from storage and slow release of pharmaceuticals and radioactive tracers to research in controlled storage and release of hydrogen. Microspheres are also used in composites to fill polymer resins for specific characteristics such as weight, sandability and sealing surfaces. When making surfboards for example, shapers seal the EPS foam blanks with epoxy and microballoons to create an impermeable and easily sanded surface upon which fiberglass laminates are applied.

Glass microspheres can be made by heating tiny droplets of dissolved water glass in a process known as ultrasonic spray pyrolysis (USP), and properties can be improved somewhat by using a chemical treatment to remove some of the sodium. Sodium depletion has also allowed hollow glass microspheres to be used in chemically sensitive resin systems, such as long pot life epoxies or non-blown polyurethane composites

Additional functionalities, such as silane coatings, are commonly added to the surface of hollow glass microspheres to increase the matrix/microspheres interfacial strength (the common failure point when stressed in a tensile manner).

Microspheres made of high quality optical glass, can be produced for research on the field of optical resonators or cavities.

Glass microspheres are also produced as waste product in coal-fired power stations. In this case the product would be generally termed “cenosphere” and carry an aluminosilicate chemistry (as opposed to the sodium silica chemistry of engineered spheres). Small amounts of silica in the coal are melted and as they rise up the chimney stack, expand and form small hollow spheres. These spheres are collected together with the ash, which is pumped in a water mixture to the resident ash dam. Some of the particles do not become hollow and sink in the ash dams, while the hollow ones float on the surface of the dams. They become a nuisance, especially when they dry, as they become airborne and blow over into surrounding areas.

Hollow glass microspheres (sometimes termed microballoons, or glass bubbles) have been used as low-density fillers for various kinds of polymeric compounds since the mid-1960s. They are gas-filled, spherical, borosilicate particles with diameters typically between 10 and 100 microns. The spheres are manufactured on an enormous scale by several companies worldwide and, despite their structure, they can have extremely high compressive strength. They are routinely used as fillers in concretes, syntactic foams and other structural components, particularly in the marine and aerospace sectors. The profile of weight saving materials has increased dramatically in recent years due to both rising oil prices and environmental awareness.

Someone has taken low density fillers to the next stage of development. By adding less than 100 nanometers of materials, such as metals and metal oxides to the surface of the hollow glass particles, hybrid materials can be generated which retain the functionality of the coating material itself, but with the benefits of significantly reduced density, better handling/recovery properties and improved particle/matrix interfacial strength. Using its expertise in particle coating, They has developed low density fillers coated with, amongst other materials, titanium dioxide and metallic silver. The aqueous-based processes used to make these materials readily lend themselves to large scale production.

The range of applications in which coated microspheres and microparticles can be used to enhance current composites, or provide new solutions, is extremely diverse and the size, density, surface chemistry and functionality required by end users tend to be application specific. There is significant scope, therefore, for the development of a wide range of new materials to meet these diverse market opportunities.

From: microspheretechnology