In bedding, there are often two kinds of allergens: one is the allergen that comes with the bedding, such as down or cotton; The other is bacteria and mites that are left on the bedding by sweat, dander and other dirt. Bacteria are single-celled organisms, which are very small and can't be seen with the naked eye. Even if you look at the clean bedding, it is possible to hide hundreds of millions of bacteria. They mainly reproduce by asexual division, which usually divides once every 20-30 minutes. Just to calculate, if there is one bacteria in the quilt in the morning, at 12:00 noon, the bacteria can multiply to at least 16777216, so how many bacteria are there in your quilt? I can't imagine!

Can the melt-blown cloth with electret masterbatch achieve 95% or higher filtration efficiency? A good high-quality melt-blown cloth is related to material, melt-blown process, voltage, etc., so the achievement of N95 standard is not necessarily related to electret masterbatch. The greatest effect of electret masterbatch is to help us meet the N95 standard of this melt-blown cloth to store charge and extend its validity! For example, our country has a technical standard for new energy vehicles, which is the range. This requires an efficient and durable battery to continuously provide electric energy to meet the requirements. To conduct electret treatment for melt-blown cloth is equivalent to charging melt-blown cloth and storing more electric charges. The electret masterbatch is the battery of our meltblown cloth!

Toughened grade poly (phthalamide) (PPA) has excellent mechanical properties - strength, hardness, fatigue resistance and creep resistance in a wide temperature range and high humidity environment. PPA combines superior toughness with a certain range of hardness and flexibility, the rigidity required for one-time use in fasteners, and a good choice of flexibility in repeated use. PPA resin is a semi-aromatic polyamide with terephthalic acid or phthalic acid as raw material. There are both semi-crystalline and non-crystalline, and their glass transition temperature is about 255 ℃. Amorphous PPA is mainly used for occasions requiring barrier performance; The semi-crystalline PPA resin is mainly used for injection molding and other melt processing processes. The following mainly introduces semi-crystalline PPA resin, unless otherwise noted. The melting point of semi-crystalline PPA is about 590 ℃, and it is supplied in the form of opaque rectangular slices. PPA resin is stronger and harder than fatty polyamides such as nylon 66; The sensitivity to water is lower; Better thermal performance; Moreover, creep, fatigue and chemical resistance are also much better. For example, the tensile strength of PPA resin containing 45% short glass fiber is about 276 MPa, the bending modulus of elasticity is more than 13786 MPa, and the thermal deformation temperature (HDT) is 285 ℃. Even with mineral filler grade PPA, the tensile strength can reach 117 MPa. The ductility of PPA resin is not as good as that of nylon 66. However, the unreinforced impact modified PPA resin has been developed, and its notched cantilever impact strength is up to 1.1 kJ/m.

Type of colorant There are four types of plastic colorants according to their physical forms: Powdery colorant - color powder; Solid colorant - color masterbatch; Paste colorant - color paste; Liquid colorant - color oil; In the coloring of plastic industry, the application of color powder and color masterbatch is relatively extensive.

Nylon (PA) has a series of excellent properties such as high mechanical strength, chemical resistance, oil resistance, wear resistance, self-lubrication, easy processing and molding, and has become one of the thermoplastic engineering plastics widely used at home and abroad. However, in practical applications, the performance requirements of nylon are different under different service conditions or environments. For example, nylon materials are required to have high strength, high rigidity and high dimensional stability for parts such as electric drill and motor housing, pump impeller, bearing, diesel engine and air conditioning all-plastic fan; Due to the poor low-temperature toughness of nylon, it is necessary to toughen it at this time; In some outdoor applications, nylon materials must be weather-resistant in long-term outdoor environment. The reinforcing materials used for reinforcing nylon are mainly fiberglass, carbon fiber, whisker and other fibrous materials, and glass fiber reinforcement is the most widely used. The rigid strength and hardness of the material can be significantly improved by glass fiber reinforcement, and the dimensional stability and heat resistance of the material can be significantly improved. Because the strength of nylon itself is not enough, the strength of nylon can be improved by adding 10-30% fiber. In particular, the strength of 30% is recognized as the most appropriate proportion. There are also 40-50%. According to the specific requirements of different products, plus the appropriate formula, it can be successful.

It is the wristband of the bracelet that causes bacteria to exceed the standard. Because its material is not breathable and sweaty, it is easy to breed bacteria when worn for a long time. Common materials such as silicone, rubber, TPE, TPU, etc. have this hidden danger. How can we solve it?