Posts tagged ‘Hollow glass beads’

Hollow glass beads are small, lightweight, and spherical particles made of glass. They are commonly used in various industrial applications such as coatings, plastics, and composites due to their unique properties such as low thermal conductivity, low density, and good insulation.

The production process of hollow glass beads typically involves the following steps:

  1. Glass melting: Raw materials such as silica sand, soda ash, and limestone are melted in a furnace at high temperatures (around 1500°C) to form a glass melt.
  2. Glass refining: The glass melt is refined to remove impurities and homogenize the composition.
  3. Glass blowing: The glass melt is fed into a blowing machine that blows the molten glass into small hollow bubbles using compressed air. The size of the bubbles can be controlled by adjusting the air pressure.
  4. Cooling and solidification: The hollow glass bubbles are then cooled and solidified in a cooling chamber. The cooling process is critical to ensure the beads have a uniform size and shape.
  5. Separation and classification: The cooled glass beads are separated from the cooling medium and classified based on their size and density.
  6. Surface treatment: The surface of the hollow glass beads can be treated with various coatings or surface modifiers to improve their properties such as adhesion, hydrophobicity, and compatibility with different matrices.
  7. Packaging and shipping: The final product is packaged in bags, drums, or bulk containers and shipped to customers.

Overall, the production of hollow glass beads is a complex process that requires precise control of various parameters such as temperature, pressure, and cooling rate to ensure consistent quality and performance.

In recent years, the demand for sealant in the construction field has been increasing, among which the silicone sealant is widely used and has a large amount. The silicone sealant is prepared with polysiloxane as the main raw material, and its molecular chain is composed of siloxane chain, which is cross-linked to form a network of siloxane chain skeleton structure during the curing process. The bond energy of Si-0 (444 kJ/mol) is very high, which is not only much higher than the main chain bond energy of other ordinary polymers, but also higher than the UV light energy (399 kJ/mol). Therefore, Si-0 has excellent high and low temperature resistance, weather resistance and UV light aging resistance.

5235 special silicone modified polyester resin is a specially treated silicone modified polyester resin with excellent film-forming property, high gloss, high temperature resistance, high hardness baking resin, excellent physical compatibility and excellent storage stability. The hardness reaches 7H after complete curing on stainless steel plate.

1) High hardness and good toughness: the surface hardness of stainless steel substrate can reach 7H after curing and film forming;

2) Good adhesion: it can reach grade 0 on metal substrates such as stainless steel, and some substrates can reach grade 1; 3) High fullness, high gloss, leveling;

4) High transparency: the paint film is colorless and transparent, with light transmittance ≥ 92%; (Various colors can be modulated by yourself)

5) Good heat resistance: varnish resin can withstand 350 ℃ high temperature for a short time;

6) With excellent storage stability, it can grind various high-temperature resistant color pastes

7) Excellent compatibility with any other silicone polyester resin

8) It can be solidified to form film in the temperature range of 180-280 ℃

Application range of resin:

1. Used separately for high-temperature resistant coatings, such as hairpin coating, non-stick pot coating, high-temperature resistant industrial coating, etc

2 Grind various high-temperature resistant color pastes

3. Mix with other resins to improve heat resistance and luster

4. Replacement of general nano-silicone resin

In addition, silicone sealant is also a good adhesive material. Its adhesive performance to glass is very excellent, and it is often used for sealing and bonding of double-layer insulating glass. Reinforcing filler accounts for a relatively high proportion in the formula of silicone sealant, and the commonly used ones include Nanomaterial calcium carbonate, fumed silica, carbon ink, etc. When the nanomaterial calcium carbonate is used as reinforcing filler, the dosage can reach 60% of the total mass of the system. In addition, some silicone sealants will also add incremental fillers to reduce costs, adjust and improve thixotropy and fluidity. The commonly used incremental fillers are heavy calcium carbonate. The common feature of the above fillers is that the density is high, such as the density of Nanomaterial calcium carbonate is 2.7g/cm3, which also leads to the high density of the final product sealant, and the density of most silicone sealant is about 1.5g/cm3. Hollow glass microsphere, also known as hollow glass microsphere, is a lightweight inorganic powder material developed in recent years.

Hollow glass beads are borosilicate glass formed at high temperature (>1400 ℃) and have stable chemical properties. The hollow glass bead is a hollow, thin-walled closed spherical structure with thin gas inside. This special structure makes it have the characteristics of low density, low thermal conductivity and high compressive strength. The true density of hollow glass bead is 0.12-0.70g/cm3, and the thermal conductivity is 0.038-0.085 W/(m · K). It can be used as a semi-reinforcing filler in silicone sealant, effectively reducing the density and thermal conductivity of the sealant, and also improving the thermal deformation temperature of the sealant. In addition, hollow glass beads generally do not react with substrates or other substances, and are suitable for a variety of systems.

Glass microsphere has the advantages of light weight, low thermal conductivity, non-toxic, incombustible, good chemical stability and high dispersion. These advantages can be reflected in the finished products after molding. The final product is light in weight, easy to install, and especially suitable for manufacturing products requiring buoyancy.

Hollow glass beads can be used in many material fields to improve or improve the water resistance, compressive strength, shrinkage and impact strength of materials. Low density, can make lighter parts; The porosity and specific surface area are low, and the bead absorption resin is less, so the viscosity is not high even if the amount of filling is high; It is chemically stable and inert; Good anti-cracking performance, and the final product is easy to be post-processed, such as drilling, cutting and polishing, which is another advantage that hollow glass beads are easy to be damaged.

Because, like the shock absorber, the compressive strength and impact strength of the product are also improved.

Because the hollow glass bead is destroyed prior to the resin matrix, the impact degree of the product is reduced.

It is an advantage. On the one hand, it can reduce

Application of glass beads in synthetic foam

Glass bead resin composite is usually called synthetic foam. The main feature of this composite material is its low density. It is a multifunctional composite material with wide mechanical properties and a combination of vibration reduction, insulation and fire prevention.

2 Application of glass beads in plastics and rubber

In the plastic industry, glass bead is an inorganic powder filler developed in recent years, with high filling capacity. The plastic filled with it has excellent rheological processing properties, uniform shrinkage, and increased impact resistance. Glass bead is used for filling UHMWPE material, which not only acts as a solid lubricant to improve processing fluidity, but also modifies the comprehensive mechanical properties of UHMWPE material to improve its strength and wear resistance

The tensile strength, impact strength, hardness and other mechanical properties of nylon 6 with glass beads are improved, and the material aging caused by light and heat can be prevented. With the increase of glass bead content, the Martin heat resistance temperature of the material increases.

Application of glass bead in spacer material of liquid crystal display (LCD)

The spacer material of liquid crystal display is the focus of research at home and abroad, which is also one of the more promising applications of glass beads [7]. At present, LCD spacer materials often use various organic particles, and also use ground optical fibers. These materials have different degrees of shortcomings

Application of glass bead in explosives

The introduction of hollow glass beads into emulsion explosives overcomes the above shortcomings, greatly improves the detonation performance of explosives and significantly improves the storage stability

5 Application in cement products

The density of hollow microsphere is low and it is not easy to absorb water. It can reduce the density of grouting cement by adding it alone or together with expansion additives

6 Application in coatings

The glass bead is applied to the coating, and the solar heat reflection and thermal insulation coating prepared has high solar heat reflection and high radiation performance, which improves the thermal insulation performance of the coating, and is used in reflective pavement and decoration and beauty joints

7 Application in medical field

Coupling treatment of hollow glass microspheres and electroless nickel plating on the surface of hollow glass microspheres

After sex, it has a promising prospect in medical immunoassay technology.

Application of modified glass beads in electromagnetic shielding and microwave absorption

Glass beads are widely used in building materials, plastics, rubber, coatings, chemistry, metallurgy, navigation, aerospace and other fields, and have irreplaceable important applications. The modified hollow microspheres have electrical and magnetic properties, which can be used in the fields of microwave absorption or electromagnetic shielding to prepare functional materials and broaden its application range. Due to the high energy consumption of artificial glass beads, the cost of glass beads obtained from fly ash can be greatly reduced, so the bead filler will have a good development prospect. At present, the utilization of fly ash hollow microsphere in China is still at the initial stage, and the utilization rate and utilization level need to be developed. As a new multi-functional material, its application prospect will be better and better.


How to Reduce Density of Rubber Vacuum Glass Bead Foaming Agent Special for Rubber Weight Reduction

Why rubber has high density;

The density of the rubber without filler is 0.9g/cm, but the rubber needs to add inorganic filler because of its strength, temperature resistance, shrinkage resistance, cost reduction and other characteristics. The filler density is generally 2.5-3.6, which will greatly increase the weight, leading to the rubber density exceeding the standard.

Inorganic filler powder

Methods for reducing the density of rubber;

The vacuum glass beads are added to the rubber. The density of the vacuum glass beads is 0.23-0.28g/cm, 3-5 times lighter than the rubber. The compressive strength is 35-42MPA. It has high strength and does not crush. It can be filled into rubber and other materials to effectively reduce the weight to meet the density standard.

Vacuum glass beads are often used to replace foaming agents in rubber soles. Because of their high strength, strong weather resistance, high hardness, and strong aging resistance, vacuum glass beads will not collapse for a long time after they are made into soles, delaying their service life.

Real shot of vacuum glass bead

Why vacuum glass beads can reduce weight;

Vacuum glass bead is a kind of bubble type ultra-fine inorganic powder. The microscopic view is closed spherical hollow particles. The glass bead is filled into the resin, plastic and rubber to achieve foaming effect and effectively reduce the product density.

Vacuum glass bead morphology;

Vacuum glass bead is a kind of low density inorganic white solid powder, which is made by chemical method. It presents spherical vacuum powder under a microscope. The density of conventional products is generally 0.15-0.8g/cm, and it is often used for thermal insulation coatings, plastic foaming, rubber weight reduction, etc.

Plastic anti warping glass beads;

The vacuum glass bead can prevent warping, reduce shrinkage, resist high temperature, fire and other characteristics after being added into the plastic. The recommended usage is 7-20%, which is adjusted according to the product characteristics.

Vacuum glass beads are widely used;

It can be used for reflective coatings, silica gel pads, silica gel products, resins, thermal insulation coatings, thermal insulation coatings, thermal insulation layers, thermal insulation paints, thermal insulation intermediate coatings, rubber soles, rubber pads, yoga mats, reflective coatings, thermal insulation coatings, printing coatings, plastic products, plastic plates, wood plastics, man-made boards and other products with wide applications and strong chemical stability.


Q: The role of plastic filled hollow glass beads;

Answer: Hollow glass beads have the effects of low density, insulation, light weight and heat insulation. Adding them to plastics can reduce the weight. Increase liquidity.

Q: The effect of insulating glass beads used in thermal insulation coatings;

Answer: After insulating glass beads are added to the thermal insulation coating, the thermal insulation effect of the coating can be greatly enhanced.

Q: What is added to rubber to reduce density;

Answer: The use of vacuum glass beads can effectively reduce the density, increase the volume and enhance the overall performance of rubber.

Q: What is the thermal conductivity of the vacuum glass bead;

Answer: The special thermal conductivity of nano water-based thermal insulation coating is 0.03, which effectively reduces the performance of 15-25 ℃.

Sinosteel Maanshan Mining Research Institute Co., Ltd. updated the review status of listing application on December 19, and the company’s IPO application has been accepted.

Tongbi Finance and Economics learned that the company’s predecessor, “Research Institute of Ferrous Metallurgical Mines of the Ministry of Metallurgical Industry”, was founded in 1963 and was a key scientific research institute directly under the former Ministry of Metallurgical Industry. The company has long been engaged in professional services for comprehensive utilization of mineral resources, providing customers with technical services and technical engineering services in mining, mineral processing, rock and soil, mine safety and environmental protection, etc; At the same time, the company pays attention to the technical research and development of new materials such as hollow glass beads, new mining curing materials, carbon aerogel, spherical weighting materials, and realizes the industrial mass production of hollow glass beads.

The State Council and various ministries and commissions have successively issued a series of policies, including the “cornerstone plan”, committed to ensuring the supply security of national strategic mineral resources. With the support of the above national strategies and industrial policies, the industry of comprehensive utilization of mineral resources has broad development space. With the progress of product technology and application technology, hollow glass beads are more widely used in more downstream industries, and the application field will be further expanded in the future. For example, in the field of new energy vehicles, hollow glass beads are used as filling materials to reduce the density and weight of adhesives and interior and exterior trims, achieve lightweight vehicles, improve the physical and chemical properties of adhesives and interior and exterior trims, and improve production efficiency. With the increasing demand of new energy vehicles for lightweight and improving production efficiency, hollow glass bead products are expected to be more widely used in the future. In addition, with the continuous emergence of emerging industries and the continuous development of traditional industries, hollow glass bead products will expand more application fields.

In recent years, the development and utilization intensity of China’s mineral resources has rapidly improved, mining and dressing technology and equipment have made continuous progress, and the comprehensive utilization level has greatly improved. In addition, at present, entrepreneurs all over the country are very optimistic about the development prospects of the sand and gravel industry and the business opportunities for the development and utilization of mineral resources, and have invested in the construction of large and medium-sized sand and gravel production bases. At the same time, major state-owned enterprises and domestic large cement enterprise groups have begun to set foot in and layout the sand and gravel aggregate industry according to the industry development trend. Their involvement has injected new development impetus into the development of the sand and gravel industry and become a new force to promote the high-quality and high-level development of the sand and gravel industry.

Opening ceremony of Advanced Powder Material Industrial Park of Sinosteel Mining Institute was held

Yuan Fang and Liu Guowang attended

In the afternoon of November 29, the opening ceremony of the Advanced Powder Materials Industrial Park of Sinosteel Mining Institute was held in the municipal economic development zone. Yuan Fang and Qin Junfeng, municipal leaders, Liu Guowang and Xu Chuanhua, leaders of Sinosteel Group, and Wang Qiang, secretary-general of the municipal government attended the opening ceremony.

It is reported that the advanced powder material industrial park project of Sinosteel Mining Institute was constructed by Maanshan New Material Technology Co., Ltd. of Sinosteel Group with an investment of 2 billion yuan. The project is divided into two phases. In the first phase, three carbon aerogel production lines, two high-performance hollow glass beads production lines, and one spherical weighting material production line will be constructed. After reaching the capacity, the project can produce 1000 tons of carbon aerogel, 15000 tons of high-performance hollow glass microsphere, and 20000 tons of spherical weighting materials annually. It is expected to achieve an annual output value of 1 billion yuan and an annual tax of 60 million yuan.

The first phase of the project was started in October 2021. At present, the main plant has been completed, the equipment has been installed and commissioned, and is in trial production. It will be formally put into production before the end of the year.


The client of Zhong’an Online and Zhong’an News has opened up the territory of China. The Yangtze River Delta in the east is the region with the most active economic development, the highest degree of openness and the strongest innovation ability in China. Since the regional integration of the Yangtze River Delta has become a national strategy, Anhui has accumulated the internal strength of innovation in this hot land, unleashed the strong momentum of industry, and strove to stir up a surging wave of development in the scientific and technological innovation of the Yangtze River Delta integration.
Mechanism: “Take the lead” to overcome technical problems
Innovation is independent of origin, and heroes are independent of origin.
In 2021, our province will explore the mechanism of “unveiling the title and taking the lead” for the first time, spread hero posts at home and abroad, and sincerely invite talents from all walks of life to come to Anhui to take the lead and tackle the technical problem of “sticking the neck”.
“Let whoever can do it” is an important principle in the mechanism of “unveiling the list and taking the lead”. By selecting leaders and vanguards, focusing on the key areas of Anhui Province, we will work together to break through the key common technical bottlenecks, strengthen a number of advantageous enterprises, cultivate a number of advantageous products, and improve the modernization level of the industrial chain.
“We organized and implemented 9 provincial major projects in the way of ‘unveiling the list and taking the lead’, including 3 cooperation projects between our province and the Yangtze River Delta.” According to the relevant person in charge of the Planning Office of the Provincial Science and Technology Department, through the “unveiling and leading” mechanism, the barriers between “technology” and “market” can be broken through, which is more conducive to using sufficient resources, selecting the best among the best, improving the transformation efficiency of scientific research achievements, and stimulating the innovation vitality of the Yangtze River Delta region.
On the road of innovation,  Sinosteel Maanshan Institute of Mining Research, together with Hehai University and China University of Science and Technology, achieved seamless connection between technology “supply and demand”, became a solid partner, undertook the project of “Research and Development of Key Technologies for High Softening Point Hollow Glass Beads for Spacecraft Thermal Protection System”, made efforts to improve the key preparation technologies for industrialization of high-performance hollow glass beads, and realized the localization of high softening point hollow glass beads for spacecraft thermal protection system, Go to the “sea of stars” of scientific and technological innovation.

[Source: China Security Online

Observing glass beads under a microscope

Fine-grained glass microbeads cannot see their unique circular state with the naked eye, but can only be seen under a microscope and roughly see their circularity.

40 mesh solid glass beads with a rounding rate greater than 85%

40-mesh glass beads with a rounding rate greater than 80%

200 mesh solid glass beads

hollow glass beads

325 mesh glass beads with a rounding rate greater than 90%

FROM:HS glass beads



There filling performance energy efficient, low low oil, density, added 5% (wt) will be able to make the finished product increased by 25% to 35%, so as not to increase or even reduce the cost per unit volume of the coating. Hollow glass beads particles confined hollow spheres added to the coating formation of many independent microscopic cavity insulation, thus greatly improving the coating on the thermal and sound insulation, play a very good thermal insulation and noise reduction effect. The coating has a more waterproof, anti-fouling, corrosion resistance. When the surface of the hollow glass microspheres are chemically inert chemical resistance, as the film tightly packed particles of glass beads, the formation of low porosity, the coating formed on the surface of the moisture and corrosion caused by the blocking effect of ions protective film, played well protective effect.

Hollow glass beads spherical structure makes the impact force and stress have a good dispersion, added to the paint can well improve the resistance to external impact properties of the film, and the coating can be reduced due to thermal expansion and contraction the stress cracking.

Filling the hollow glass microspheres can effectively reduce other expensive fillers and pigments dosage (compare with titanium dioxide, but its volume costs beads 1/5) effectively enhance the adhesion of the coating. Low oil absorption properties of glass beads so that more resin can participate in film formation, so that the adhesion of the coating increased 3 to 4 times.


Hollow glass beads, high melting point, greatly improving the coating temperature resistance, play a good role in the fire, hollow glass beads bearing spherical particles play a role, friction is small, can enhance the flow properties of the coating film, so construction easier.

Suggested Use:
Generally added in an amount of 10% by weight of the whole surface-treated beads and low density, so that the paint during storage prone to viscosity increases and the floating phenomenon, we propose to increase the initial viscosity of the coating increases thickener (via the added amount of the viscosity control in 140KU above), and not because the viscosity is too low to generate the floating phenomenon, and each system in the particulate material in a decrease in activity due to the high viscosity of such a case, but is conducive to the stability of viscosity control.

Proposal to add the following methods:
In order to take full advantage of the characteristics of the hollow microspheres, recommended adding a last resort, that is added to the beads into the final as low speed mixing equipment dispersed using low shear force, because the spherical beads mobility well, between the friction is not large, so it is easy to disperse. You can complete a short wet, slightly extended mixing time to achieve uniform dispersion.

Beads chemically inert, non-toxic. However, because of a very light, so they need special attention added. Recommended stepwise addition method, which is the amount for each remaining 1/2 beads gradually added, this can be good to avoid beads float into the air and dispersed more complete.