In early 2020, a novel coronavirus outbreak was identified by experts. Because there is no wonder drug at the moment, it has caused an alert at the beginning. Experts suggest that the public should stay at home to prevent virus transmission; when going out is necessary, wear a mask for self- protection. As the continuous of the epidemic, the demand for medical protective equipment has increased dramatically, resulting in insufficient supply and shortage. At the [...]

In early 2020, a novel coronavirus outbreak was identified by experts. Because there is no wonder drug at the moment, it has caused an alert at the beginning. Experts suggest that the public should stay at home to prevent virus transmission; when going out is necessary, wear a mask for self- protection. As the continuous of the epidemic, the demand for medical protective equipment has increased dramatically, resulting in insufficient supply and shortage. At the [...]

1. Significance Thermal conductive silica gel pad is a kind of thermal conductive medium material, which is based on silica gel and added with metal oxide and other auxiliary materials. This material is filled into the gap between the heat source and the radiator to form a good heat dissipation path between them. Thermal conductive silica gel pad is widely used in LED industry, power industry, communication industry, automotive electronics industry, home appliance industry and [...]

Aluminum foil is a high barrier material. It can be almost completely impermeable when there is no flaw on the surface. Therefore, the film composited with aluminum foil (the thickness is usually 7 to 9 microns) has high barrier properties. However, the cost of aluminum foil is high, and it is prone to forming pinholes and difficult to recycle. The above shortcomings limit the application of aluminum-plastic composite film to a certain extent. Aluminized films [...]

According to different uses, materials barrier properties of oxygen, water vapor, nitrogen, carbon dioxide, air and other gases are tested and expressed by the transmittance of the corresponding gas. Temperature and humidity are two important test parameters in the test of barrier performance. The change of temperature and humidity will affect the internal structure of materials and the movement ability of gas molecules, especially for water vapor permeability test, humidity is the drive for water [...]

Plastic polymer materials have the advantages of good flexibility, good barrier performance, easy to carry, easy to transport and many others. While they bring convenience to people, their shortages such as not easy to recycle, difficult to degrade also cause a great burden to the environment. With the increasing popularity of plastic products, environmental problems related to plastic products production and scrap, such as white pollution and ocean microplastics are prominent. In order to deal [...]

To prevent microbe invading open wound, keep moisture and help wound rapid healing, medical dressings are applied. Medical dressing’s applications require it to have good microbes barrier properties and water vapor permeability. As the development of Pathological and Physiological Study on Wound Healing, types of medical dressings are extended from traditional cotton gauze to Synthetic fibers, polymembranes, foamed polymers, hydrocolloids, alginates etc. Wound moisture and effusion pearmeability is always a focus in medical dressing studies. [...]

As a new kind of inorganic heat insulating material, foam glass is featured with a structure of numerous pores. It is mainly made of glass added with adequate foaming agents after heating and baking in high-temperature tunnel furnace, then annealing and cooling. Because it well reserves the chemical stability of inorganic glass, it has the following features: low density, low thermal conductivity, vapor impermeability, no water absorption, incombustibility, protection from rat eating, high mechanical strength [...]

Packaging materials for dry products, powder products, electronic products and other products sensitive to water vapor should have good moisture barrier performance, which is generally characterized by testing the water vapor transmission rate of packaging materials; packaging materials with high water vapor transmission rate have poor moisture barrier performance. Water vapor permeability refers to the mass of water vapor that permeates a unit area of a material in a specified time period. According to the [...]

There are many kinds of packaging materials for drugs, such as plastic bottles, aluminum foil, hard film, aluminum plating composite film, CO extrusion composite film, etc. these materials should have high barrier performance, which can prevent the drugs from discoloration, deterioration, moisture absorption, caking and other quality problems. The barrier performance of drug packaging materials includes the barrier of oxygen, nitrogen, water vapor and other gases, such as preventing the excessive permeation of oxygen and [...]