Frequently Asked Questions

Source：Baolijin New Material Technology Co., Ltd

What is anti-static masterbatch?

What is anti-static masterbatch? Antistatic masterbatch, also known as anti-static masterbatch. Antistatic masterbatch is obtained by high-speed mixing and extrusion molding of carrier and antistatic system, followed by granulation. It is used to reduce the surface resistance of materials and prevent the adverse effects of static electricity on various industrial sectors and humans.

Polymers are typically insulators with a surface resistance of 1012 Ω or higher, while anti-static packaging materials require a surface resistance of 107-1011 Ω. This product is an additive type high-efficiency anti-static masterbatch for polyolefin plastics, consisting of a carrier, anti-static agent, and other additives.

The addition of this product to plastic can avoid static electricity caused by the insulation properties of the polymer itself, making it suitable for the packaging requirements of IT products and the production of special anti-static products. It has a good effect on dust prevention on the surface of the product. This product has good anti-static effect, long-lasting effectiveness, good dispersibility, small addition amount, and does not contain any toxic substances, meeting FDA standards.

How to add anti-static agents to plastic production?

How to add anti-static agents to plastic production? Static electricity hazards often cause significant losses and disasters. The main methods to prevent static electricity on polymer surfaces include air ionization, humidification, introduction of conductive substances, formation of a moisture absorbing film on the surface, and application of anti-static agents. Among them, the main applications in the use of plastic products are the addition of conductive substances and anti-static agents.

The most commonly used anti-static method currently is to add anti-static agents. Antistatic agent is a chemical additive mainly composed of surfactants that can prevent the generation of static charges or effectively dissipate static charges. The way to use anti-static agents is to coat or add them on the surface of the product.

The development of anti-static agents in China is relatively fast, mainly including high-efficiency non-toxic anti-static agents for the plastic industry, high-efficiency multifunctional anti-static agents for the synthetic fiber industry, and surface treatment agents.

How to distinguish between real and fake anti-static agents?

How to distinguish between real and fake anti-static agents? It can be identified by the appearance color of the product, which is used to label various imitation products in the market with the number 3. The imitation version has a Japanese Chinese character label, while the original version has a solid color small circle label without any Japanese Chinese character label.

The test version of the product has a large imitation version with a rough gap process; The genuine original socket is very small, with a curved angle and precise edge gap processing.
Standard configuration grounding wire: The genuine and original wire is significantly thicker than the imitation version; The original rubber process of the grounding wire clamp head is delicate and smooth; The imitation version has rough workmanship, is not slippery, and the material is relatively hard.

Internal desiccant of the product: The original packaging is made of non-woven fabric material, which is neat, while the imitation version is made of ordinary paper, which has poor breathability and is prone to creases in the packaging. The above testing methods are the experience summarized by many manufacturers’ procurement departments from practice so far, hoping to be helpful to everyone.

What is the working principle of permanent anti-static masterbatch?

The biaxially oriented polypropylene (BOPP) film with permanent anti-static masterbatch mechanism is a crystalline product obtained by adding appropriate functional additives to polypropylene proprietary materials and undergoing biaxially oriented stretching process.

Due to polypropylene being a typical non-polar polymer material with extremely poor water absorption, the surface charges generated by friction are difficult to dissipate, resulting in strong electrostatic properties. To eliminate the charges generated on the membrane surface, anti-static agents need to be added. Antistatic masterbatch is a bipolar substance that can migrate to the surface of thin films, absorb moisture from the air, form a conductive layer, and promptly dissipate accumulated charges, giving it the ability to control charging.

The ability to disperse charges is essential for the processing and use of polypropylene films. Otherwise, during the production process, static electricity may cause electric shock to the operators; When making bags or packaging goods, surface charges can cause the film to adhere to the packaging equipment; For packaged goods, due to static electricity, dust will be adsorbed during storage or sales, affecting the image of the product.

Usually, the ability of permanent anti-static masterbatch to eliminate static electricity is measured by the time it takes for the charge accumulated on the surface of BOPP film to decay to half its value, which is the electrostatic half-life value.

Antistatic agents have mobility, and after being added to polymers, they will migrate from the added layer to the layer with low content or not added. Therefore, in the actual production process, it is generally only added to the core material of the film. Otherwise, if an anti-static agent is added to the surface layer, it will be consumed due to reverse migration to the core layer and will not have the anti-static effect.

The migration ability of permanent anti-static masterbatch added to the anti-static agent in the core layer is affected by storage temperature and storage time. Within the allowable range, the higher the temperature, the faster the migration speed. At the same temperature, migration requires a process and generally requires storage for one to two weeks. In addition, the mechanism of action of anti-static masterbatch is that the crystallinity of the polymer also has a significant impact on the migration degree of additives.

What is the difference between anti-static plastic and conductive adhesive?

Anti static plastic is used to prevent the generation and accumulation of static electricity. When electrostatic charges accumulate to a certain degree, a voltage difference will occur. And conductivity is just an overview of an object’s properties, it indicates that an object has the property of conductivity. So the way to prevent static electricity is to use conductive materials to connect objects that may generate static electricity to the ground, and directly transfer the generated charges without causing charge accumulation.

The source of conductive plastic raw materials is usually derived from petrochemicals made from petroleum or natural gas, which are high molecular weight resins obtained through polymerization reactions. Plastic definition: A high molecular weight compound primarily composed of synthetic resin. Polymer: molecular weight>10000; Medium molecular weight: 1000 ≤ molecular weight ≤ 10000; Low molecular weight: molecular weight<1000; The three forms of plastic: glassy state; High elasticity state; Viscous flow state; Instead of solid, liquid, and gas states, anti-static plastics simply cannot have liquid and gas states (they decompose before reaching that temperature);

Classification of Conductive Plastic Raw Materials

1. According to plasticizing properties: thermoplastic and thermosetting plastics. Thermoplastic: After being heated and softened to form, plastics can continue to be heated and softened to form. Thermosetting plastics: After being heated and softened into shape, plastics cannot be further heated and softened into shape (electric wood).

2. Classified by purpose: General plastics and engineering plastics General plastics: have common plastic properties and can be widely used in production. Anti static plastic, four universal plastics: PP, PE, PS, PVC Engineering plastics: have special mechanical properties and can be used as engineering materials. ABS，PC，PMMA，POM，PA，PPS，PBT，PET，LCP。

3. Classified by crystallization: crystalline plastics and non crystalline plastics. Crystalline plastics: ordered molecular chain arrangement (PE, PP，POM，PA、PPS）； Amorphous plastics: disordered arrangement of molecular chains (PS, ABS, PC, PMMA)

The application of conductive plastic materials ranges from tiny gears and screws to household appliances, telephones, cleaning tools, and even cars, computers, medical equipment, and so on. The applications of plastics in daily life are endless. Therefore, plastic has become an indispensable part of daily life. As a bridge between humanity and high technology, plastic has endless potential for development.

How to improve the hardness of modified plastics

Hardness refers to the ability of a material to resist being pressed into its surface by other harder objects. The magnitude of the hardness value is a conditional quantitative reflection of the softness and hardness of the material, and it is not a simple and deterministic physical quantity. So, what is the hardness of modified plastics? How to improve the hardness of modified plastics?

The magnitude of the hardness value depends not only on the material itself, but also on the testing conditions and measurement methods, that is, different hardness measurement methods may result in different hardness values for the same material. Therefore, in order to compare the hardness values between materials, it is necessary to measure the hardness values using the same measurement method in order to have comparability.

There are several methods commonly used to represent hardness, including:
a、  Shore hardness
b、  Rockwell hardness
c、  Mohs hardness

Hardness of added modified plastics

The hardness of modified plastics refers to a modification method of adding hard additives to plastics. The commonly used hardness fillers are rigid inorganic fillers and fibers.
Surface treatment improves the hardness of plastics

The method of improving the surface hardness of plastic refers to only improving the hardness of the outer surface of the plastic product, while keeping the hardness inside the product unchanged. This is a low-cost method for improving hardness.

This modification method is mainly used for shells, decorative materials, optical materials, and daily necessities. This modification method mainly includes three methods: coating, plating, and surface treatment.

Blending and compounding to improve the hardness of plastics

Blending improves the hardness of plastics
The improvement method of plastic blending is to mix low hardness resin with high hardness resin to increase its overall hardness. Common blend resins include PS, PMMA, ABS, and MF. The resins that need to be modified are mainly PE, PA, PTFE, and PP.

Composite improvement of plastic hardness
The method of improving hardness through plastic composite is to composite a layer of high hardness resin on the surface of low hardness plastic products. This method is mainly suitable for extruding products such as boards, sheets, films, and pipes. Common composite resins include PS, PMMA, ABS, and MF.

Our technicians have created many white particles, which are permanent anti-static masterbatch. Do you know its advantages? If you don’t know, let me inform you.

1. It has moisture-proof, good mechanical strength, good dimensional stability, soft texture, non-toxic, odorless, good shrinkage and printability.

2. Anti static masterbatch has excellent anti-static properties, good thermal stability, compatibility, and processing performance.

3. Made from high activity resin as the carrier, processed with high-quality additives and whitening agents.

4. Anti static masterbatch has simple application and excellent performance, and can be widely used in the consumption of polyolefin anti-static plastic products with stable quality.

POM (Polyoxymethylene Resin) Definition: Polyoxymethylene is a linear polymer with no side chains, high density, and high crystallinity. According to the different chemical structures in its molecular chain, it can be divided into two types: homopolymer formaldehyde and copolymer formaldehyde.

The important difference between the two is that homopolymer formaldehyde has high density, crystallinity, and melting point, but poor thermal stability, a narrow processing temperature range (about 10 ℃), and slightly lower acid-base stability; However, the density, crystallinity, melting point, and strength of formaldehyde copolymer are relatively low, but it has good thermal stability, is not easily decomposed, has a wide processing temperature range (about 50 ℃), and has good acid-base stability. It is an engineering plastic with excellent comprehensive performance.

Has good physical, mechanical, and chemical properties, especially excellent friction resistance. Commonly known as Sai Gang or Duogang, it is the third largest general-purpose plastic. Suitable for producing wear-resistant parts, transmission parts, as well as chemical and instrumentation components.

General performance

Polyoxymethylene is a hard and dense material with a smooth and glossy surface, light yellow or white in color, and semi transparent in the thin-walled part. The combustion characteristics are easy to burn, continuing to burn after leaving the flame. The upper end of the flame is yellow and the lower end is blue, with melting and dripping, and a strong irritating formaldehyde odor and fishy smell.

Polyoxymethylene is a white powder, generally opaque, with good coloring properties, a specific gravity of 1.41-1.43 grams per cubic centimeter, a molding shrinkage rate of 1.2-3.0%, a molding temperature of 170-200 ℃, and a drying condition of 80-90 ℃ for 2 hours. The long-term heat resistance of POM is not high, but it can reach 160 ℃ in the short term. Among them, the short-term heat resistance of homopolymer POM is more than 10 ℃ higher than that of copolymer POM, but the long-term heat resistance of copolymer POM is about 10 ℃ higher than that of homopolymer POM. Can be used for a long time within the temperature range of -40 ℃ to 100 ℃. POM is highly prone to decomposition, with a decomposition temperature of 240 degrees. Stimulating and corrosive gases occur during decomposition. Therefore, mold steel should be made of corrosion-resistant materials.

Mechanical property

POM has high strength, rigidity, good elasticity, and good wear resistance. Its mechanical properties are excellent, with a specific strength of up to 50.5MPa and a specific stiffness of up to 2650MPa, which is very close to metals. The mechanical properties of POM change little with temperature, while the variation of copolymer POM is slightly greater than that of homopolymer POM.

POM has a high impact strength, but its conventional impact strength is inferior to ABS and PC; POM is sensitive to notches, and notches can reduce impact strength by up to 90%. The fatigue strength of POM is very outstanding. After 10 alternating loads, the fatigue strength can reach 35MPa, while PA and PC are only 28MPa. The creep deformation of POM is similar to that of PA, only 2.3% at 20 ℃, 21MPa, and 3000h, and is minimally affected by temperature.

POM has a low friction coefficient, good wear resistance (POM>PA66>PA6>ABS>HPVC>PS>PC), a high ultimate PV value, and good self-lubricating properties. POM products are prone to produce screaming noise when subjected to high loads during grinding.

Electrical performance

POM has good electrical insulation and is almost unaffected by temperature and humidity; The dielectric constant and dielectric loss vary very little over a wide range of temperature, humidity, and frequency; Excellent arc resistance and can be maintained at high temperatures. The dielectric strength of POM is related to its thickness, with 82.7kV/mm at a thickness of 0.127mm and 23.6 kV/mm at a thickness of 1.88mm.

Environmental performance

POM is not resistant to strong acids and oxidants, but has a certain degree of stability towards oleic acid and weak acids. POM has good solvent resistance and can withstand hydrocarbons, alcohols, aldehydes, ethers, gasoline, lubricants, and weak bases, and can maintain considerable chemical stability at high temperatures. Low water absorption and good dimensional stability.
POM has poor weather resistance, and its mechanical properties decrease under long-term exposure to ultraviolet radiation, resulting in surface pulverization and cracking.

Formability

.Crystalline materials have a narrow melting range, fast melting and solidification, and crystallization occurs when the material temperature is slightly lower than the melting temperature. Medium liquidity. Low moisture absorption, can not be dried.

What are the properties of anti-static agents in hot forming? Thermoformed products are applied in many fields, such as the electronics industry, food packaging, etc. Some require anti-static treatment, and the performance of various anti-static agents is as follows:

1. Non ionic anti-static agent
Due to its good thermal stability, low price, easy use, and non irritating to the skin, non-ionic anti-static agents are indispensable anti-static agents in anti-static substrates and have good application prospects.

2. Composite anti-static agent
Composite anti-static agents are developed based on the principle of coordinated effects of each component, with strong complementarity among the components and much better anti-static effects than single components. But attention should be paid to the antagonistic effects between various anti-static agents. Cationic and anionic anti-static agents cannot be used simultaneously.

3. Multi functional concentrated anti-static masterbatch
Due to the fact that anti-static agents are mostly viscous liquids, and some of them are polar polymers, they are difficult to disperse in plastics, which brings inconvenience to their use. Multi functional concentrated masterbatch has uniform dispersion, easy operation, and promising development prospects.

4. Polymer anti-static agent
Due to the good durability of polymer anti-static agents, they are generally used for plastic products that require strict anti-static effects, such as household appliance casings, automotive casings, electronic instrument components, precision mechanical components, etc.

5. Nano conductive filler
The characteristics of nanomaterials are small particle size and large effective surface area, which give them special surface effects, quantum size effects, and macroscopic quantum tunneling effects. Nanomaterials can alter the original properties of materials

What is the function of anti-static masterbatch? The mechanism of anti-static masterbatch action of biaxially oriented polypropylene (BOPP) film is a crystalline product obtained by adding appropriate functional additives to polypropylene proprietary materials and undergoing biaxially oriented stretching process.

Due to polypropylene being a typical non-polar polymer material with extremely poor water absorption, the surface charges generated by friction are difficult to dissipate, resulting in strong electrostatic properties. To eliminate the charges generated on the membrane surface, anti-static agents need to be added. Antistatic masterbatch is a bipolar substance that can migrate to the surface of thin films, absorb moisture from the air, form a conductive layer, and promptly dissipate accumulated charges, giving it the ability to control charging.

The ability to disperse charges is essential for the processing and use of polypropylene films. Otherwise, during the production process, static electricity may cause electric shock to the operators; When making bags or packaging goods, surface charges can cause the film to adhere to the packaging equipment; For packaged goods, due to static electricity, dust will be adsorbed during storage or sales, affecting the image of the product.

The ability of anti-static masterbatch to eliminate static electricity is measured by the time it takes for the charge accumulated on the surface of BOPP film to decay to half its value, which is the electrostatic half-life value. Antistatic agents have mobility, and after being added to polymers, they will migrate from the added layer to the layer with low content or not added. Therefore, in the actual production process, it is generally only added to the core material of the film. Otherwise, if an anti-static agent is added to the surface layer, it will be consumed due to reverse migration to the core layer and will not have the anti-static effect.

The migration ability of anti-static agents added to the core layer of anti-static masterbatch is affected by storage temperature and storage time. Within the allowable range, the higher the temperature, the faster the migration speed. At the same temperature, migration requires a process and generally requires storage for one to two weeks. In addition, the mechanism of action of anti-static masterbatch is that the crystallinity of the polymer also has a significant impact on the migration degree of additives.

Antistatic agents can be divided into sulfuric acid derivatives, phosphoric acid derivatives, amines, quaternary ammonium salts, imidazoles, and ethylene oxide derivatives. According to whether the hydrophilic group in the anti-static agent molecule can ionize, it can be divided into two types: ionic and non-ionic. Ionic antistatic agents are divided into three types based on the positive or negative charge after ionization: cationic, anionic, and zwitterionic.

1. Cationic anti-static agent:
(1) Monofunctional group: stearyltrimethylammonium hydrochloride, mainly used in polyolefins, ABS, polycarbonate, etc;
(2) Dual functional group: antistatic agent stearamide propyl hydroxyethyl quaternary ammonium nitrate, mainly used as an antistatic agent for polyester, polyvinyl chloride, polyethylene film and products.

2. Anionic anti-static agent:
(1) Monofunctional antistatic agent sodium nonylphenoxypropyl sulfonate (NP), mainly used for chloroacetic acid resin, ABS, polyolefin, etc;
(2) Multi functional antistatic agent alkyl bis (α – hydroxyethyl amine phosphate), mainly used for the synthesis of fibers;
(3) Polymer antistatic agents include salts of polyacrylic acid salts, maleic anhydride and other unsaturated monomer copolymers, polystyrene benzenesulfonic acid, etc. Mainly used for fibers.

3. Non ionic anti-static agent:
(1) Tetrabromobisphenol A is mainly used in ABS, epoxy resin, and polyurethane. It is also a flame retardant;
(2) Stearic acid monoglycerides, such as ADA-10M and ASA-10, are mainly used for polyolefins.

4. Bipolar anti-static agent:
(1) Alkyl dicarboxylammonium ethyl lactone, mainly used in polyester, nylon, etc;
(2) Dodecyl dimethyl quaternary ammonium salt, mainly used in polyester, polypropylene, nylon, etc.

Due to their different chemical structures and properties, various anti-static agents produce different effects.

Cationic quaternary ammonium salts have strong adhesion to polymer materials and good anti-static properties, making them a commonly used anti-static agent in plastics. However, they can irritate the skin and are toxic, making them unsuitable for food packaging films.

Anionic anti-static agents usually have no effect on the skin and do not affect the coloring of plastics, but are rarely used in plastics except for acidic alkyl phosphates or salts and alkyl sulfates.
Non ionic materials generally have lower anti-static properties than ionic materials, but they have good thermal stability and are less likely to cause plastic aging, making them particularly suitable for low temperature conditions; It can also be used in combination with anionic or cationic anti-static agents.

The characteristic of a amphoteric anti-static agent is that it can be used in combination with anionic or cationic agents. They all have strong adhesion to polymers, thus exhibiting excellent anti-static properties.

Will transparent particle antistatic agents turn yellow? No, the transparent particle anti-static agent has a transparent color and melts into a liquid when used. The color is also transparent and heat-resistant, so the color is still transparent under high and low temperature conditions. When added as a transparent liquid, the product is colorless and transparent. It does not affect the transparency of the product after use, is easy to adjust color, and does not affect the color of the product.

PVC particle hard board has good tensile, bending, compressive, and impact resistance, and can be used as a structural material alone. PVC particle soft board, elongation at break, and cold resistance will increase, but brittleness, hardness, and tensile strength will decrease. PVC can be divided into soft PVC and hard PVC. Hard PVC accounts for approximately 2/3 of the market, while soft PVC accounts for 1/3. Soft PVC is generally used for the surface of floors, ceilings, and leather.

However, due to the presence of softeners in soft PVC, it is prone to becoming brittle and difficult to store, thus limiting its range of use. Hard PVC does not contain softeners, so it has good flexibility, is easy to form, is not brittle, is non-toxic and pollution-free, and has a long storage time. Therefore, it has great development and application value. The essence of PVC is a vacuum formed film used for surface packaging of various panels, so it is also known as decorative film or adhesive film, and is applied in many industries such as building materials, packaging, and medicine.

The building materials industry accounts for the largest proportion, at 60%, followed by the packaging industry, and several other small-scale application industries.

PVC is polyvinyl chloride, a plastic product synthesized from 43% oil and 57% salt. Compared with other types of plastic products, PVC particles are more effectively used as raw materials, reducing fuel consumption. Meanwhile, the PVC manufacturing industry also has low energy consumption. And in the later stage of PVC product use, it can be recycled and converted into other new products or incinerated to obtain energy.

Polyvinyl chloride has good electrical insulation properties and can be used as a low-frequency insulation material. Its chemical stability is also good. Due to the poor thermal stability of polyvinyl chloride, prolonged heating can cause decomposition, release HCL gas, and cause polyvinyl chloride to change color. Therefore, its application range is relatively narrow, and the operating temperature is generally between -15 and 55 degrees.

Stabilizers are added to PVC during production, but stabilizers can be classified as non-toxic or toxic. Only when toxic stabilizers such as lead salts are added can hidden dangers occur. But PVC products are mixed with good and bad, and some small businesses use lead salts as stabilizers, making it difficult to meet relevant hygiene standards.

PVC particle products, whether injection molded or extruded, especially PVC material products with special requirements, strictly speaking, the performance of PVC material should be customer designed, specially designed to meet the different requirements of each user, and provide PVC solutions.