Application of Talc Powder in Plastics - Haicheng Xinshengda Powder Technology Co., Ltd

Application of talc powder in plastics

Talc powder, as an additive, modifier or filler, has been widely used in the paper industry, paint, architectural coatings, porcelain, chemical plants, daily chemical products, plastics, plastics, food, pharmaceutical and other fields. Feldspar has the advantages of soft material, low wear, high brightness, low blue absorption, and good transparency. Talc powder has four major specialties: improvement, thermal insulation, isolation, nucleation, and anti-aging. This is also why talc powder can stand out among many fillers. Haicheng Xinshengda Powder Technology Co., Ltd

Haicheng Xinshengda Powder Technology Co., Ltd

Specific content:

1、 Performance analysis of talc powder

2、 Nine factors for selecting talc powder for plastics

3、 Application of talc powder in modified plastics materials

4、 The efficacy of talcum powder in products

5、 Key place of origin

Haicheng Xinshengda Powder Technology Co., Ltd

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Industrial production and manufacturing; In the paper industry, it is widely necessary to add 10% -20% talc powder for papermaking adhesive adjustment. In high-end double copper paper, the addition of porcelain clay (or calcium bicarbonate) talc powder reaches 40%. For example, in plastic products, the amount of modified material talc powder added can reach 30% to 50% depending on the product specifications. In some PVC products, the addition amount has reached up to 70%. Talc powder is widely used in plastics, plastics, electronic devices, cables, paints, building coatings, wear-resistant materials, pharmaceuticals, skincare products, porcelain, decorative building materials, food industry, and electrical products.

Talc powder is mainly produced and processed from metal materials and nitrogen compounds and their organic compounds produced by mining enterprises. Talc powder produced from metal materials or graphite minerals includes iron powder, aluminum oxide powder, magnesium powder, titanium vermicelli, manganese iron powder, copper shavings, lead powder, zinc powder, zinc oxide powder, molybdenum powder, tungsten powder, etc. The talc powder produced and processed by nitrogen compounds in mining enterprises includes porcelain clay powder, titanium dioxide powder, talc powder, feldspar powder, calcite powder, gray calcium, heavy calcium powder, light calcium powder, fluorite powder, quartz powder, barite powder, flake graphite, joint gypsum, and bentonite powder. By using modified materials to solve the problem of ultrafine powder raw materials, its application industry can be doubled. Talc powder solved by modified materials is not only a kind of filling raw material, but also a key component of commodities, which can improve and improve commodities such as compressive strength, ductility, wear resistance, high temperature resistance, aging resistance and radiation resistance, and can significantly reduce the product cost of commodities. The article mainly discusses the use of talcum powder in plastics. Haicheng Xinshengda Powder Technology Co., Ltd

Haicheng Xinshengda Powder Technology Co., Ltd

1、 Performance analysis of talc powder

1.1. Improve

The key to enhancing the effectiveness of feldspar in plastic products lies in its unique external economic block structure. The more detailed the block structure of talc powder is maintained after production and processing, the more significant the actual improvement effect. A relatively large aspect ratio (the ratio of the average diameter of block shaped particles to their thickness) can improve the stiffness, impact compressive strength, flexural modulus, and heat resistance of plastic products. For example, bumpers, interior parts, etc.

1.2. Thermal insulation and isolation

Insulated and insulated, high-quality ultrafine and micro smooth stone powder is formed into block structures. When used in plastic products, it can be evenly dispersed in epoxy resin in an overlapping manner. Like the steel engineering mesh embedded in cement components, it can not only maintain the inherent advantages of plastic, but also produce excellent structural mechanical properties to improve the shape of support points, enhance the physical properties of plastic products, and have significant insulation and isolation effects.

1.3. Nucleation

The smoothness of feldspar is very significant, and the addition of talc powder greatly improves the opening of plastic, and can also improve the anti sticking properties of plastic films. When ultrafine talc powder (less than 1m) is evenly dispersed in the plastic substrate, it can have the effect of a nucleating agent, and it has the effect of a nucleating agent in PET plastic.

1.4. Anti aging

Feldspar, biotite, porcelain clay and other silicon (Si) containing minerals all have high barrier of infrared induction and ultraviolet light, and have significant practical effects in plastic products, such as heat insulation and aging resistance.

2、 Nine factors for selecting talc powder for plastics

2.1. High purity

The higher the purity of talc powder, the better its improvement effect. Other mineral residues in talcum powder, as well as metallic minerals (especially iron), pose a significant threat to the aging resistance of plastics.

2.2. Construction

Talc powder usually forms high-density small pieces, leaf like, radial, and fibrous bodies. Because the crystalline structure of feldspar is layered, it has a tendency to easily disintegrate into scales and unique wettability. High quality ultrafine talc powder is formed into block structures, which can be evenly dispersed in epoxy resin in an overlapping manner when used in plastic products. It has good compatibility with the resin and diverse structural and mechanical properties. Like the steel engineering mesh embedded in cement components, it can not only maintain the inherent advantages of plastic, but also improve the shape of support points with excellent structural mechanical properties, which can enhance the physical properties of plastic products. It also has significant insulation and isolation effects, reducing product costs while improving the physical properties of plastic products.

2.3. Wet glossiness and color

After mixing talcum powder with plastic, the color tone of the plastic changes to some extent. There is no high requirement for the glossiness of talc powder added to dark brown plastic products. But in order for light colored products to have a good color tone, talcum powder should have a high wet glossiness and suitable color.

2.4. Silicon dioxide composition

The silicon (SiO2) content in talc powder is the main indicator value for considering the taste of talc powder. The higher the silicon content in talc powder, the higher the purity of feldspar, and the better the actual application effect, the higher the price. Customers need to choose talcum powder based on different plastic product performance regulations. For example, the silicon content of talcum powder added to agricultural films should be higher, with smaller particle size and narrower particle size analysis, in order to improve the transparency, tensile strength, puncture resistance and other indicators of plastic films. The talc powder used in injection molding, furniture panels, and bar materials does not need to have a high silicon content requirement. Products with lower silicon content not only have lower prices, but also can improve the strength, impact and compressive strength of plastic products.

2.5. hue

The color tones of unprocessed talc powder magnesite are different from each other, and can be various shades such as milky white, dark gray, light red, pink, light blue, light green, etc. Talc powder also has a unique silver like or pearl like color and varying degrees of solid glossiness. This type of color tone can improve the appearance and visual impact of the product.

2.6. Surface characteristics

Talc powder exhibits different surface properties depending on its source. The specific surface area and oil absorption rate are largely determined by the granularity of natural resources and commodities. Other factors that can harm this type include surface roughness, particle appearance, and porosity volume. The large specific surface area and external structure of talc powder not only harm the amount of modifier used, but also promote the bonding between epoxy resin structures, thereby improving the physical properties of plastic products.

2.7. Moisture

The structural shape of talcum powder determines its characteristics. Although talcum powder is hydrophobic, due to the irregularity of its particle edges, it not only has structural water but also carboxyl groups. Therefore, the moisture content of talcum powder is higher than that of calcium bicarbonate, which can easily harm the performance of plastics. Therefore, removing the moisture content of talcum powder and dry treatment should be given great attention.

2.8. Electrostatic Induction

Talc powder has a layered structure with a larger surface area. The irregularity of particle appearance and the uneven shape of the surface layer make its friction coefficient high and prone to electrostatic induction, resulting in the inability to disperse the condensation in the middle of fine particles, which endangers the practical application effect.

2.9. Liquidity

During the entire extrusion process, the block like structure of talc powder has poor flowability and difficult dispersion compared to other particulate inorganic materials, and the torque of the server screw is large. Therefore, good active coverage is important to overcome this problem.

3、 Application of talc powder in modified plastics materials

Now everyone will provide a detailed introduction to the application of talc powder in the field of plastics. The addition of talc powder can alter various properties of plastics, such as forming shrinkage rate, surface strength, bending modulus, tensile strength, impact compressive strength, hot deformation temperature, forming processing technology, and product specification reliability; Adding ultra-fine talcum powder to plastic can significantly improve the stiffness, stress relaxation resistance, strength, surface scratch resistance, temperature resistance, and thermal deformation temperature of plastic products; Very fine-grained talc powder can also improve the impact compressive strength of plastic products, and in addition, it has a moisturizing effect, which can positively improve the flowability and enhance the production and processing performance of plastics. It also has an obvious characteristic of being a nucleating agent.

3.1. Polypropylene resin (PP)

Lime powder is commonly used for adding polypropylene. Talc powder has a block like structure with a sheet-like structure. Therefore, talc powder with a finer particle size distribution can be used as a ribbed filler for polypropylene. In the modified material management system of polypropylene, adding ultra-fine talc powder can not only significantly improve the stiffness, surface strength, high temperature stress relaxation resistance, electrical insulation performance, and specification reliability of polypropylene products, but also enhance the impact compressive strength of polypropylene. Adding a small amount of talc powder to polypropylene can also have the effect of a nucleating agent, improve the crystal shape of polypropylene, and thereby enhance the performance of various mechanical equipment for polypropylene. Moreover, by improving the crystal shape and optimizing the crystal, the transparency of polypropylene can also be improved. The polypropylene composite material filled with 20% and 40% ultrafine talc powder can significantly improve the stiffness and stress relaxation resistance of polypropylene at both room temperature and high temperature.

Polypropylene (PP)/talc powder is widely used in automotive plastics due to its advantages of high quality, low cost, and excellent structural and mechanical properties. But the raw material still has some shortcomings, such as high density, which is not conducive to lightweighting. The micro polyurethane foam PP/talc powder raw material not only has excellent performance as a composite material, but also has reduced relative density and improved quality.

PP/talc powder masterbatch

Using a twin-screw granulator in the same direction for extrusion granulation, the main processing parameters are: screw speed ratio of 140r/min, feeding speed of 1.2-1.5R/min, and extrusion heating zone temperature of 160-188 ℃.

Micro polyurethane foam PP/talc powder composite material

PP/talc powder masterbatch and polyurethane foaming agent masterbatch are molded twice in a plastic machine to produce barbell shaped samples that meet testing standards. Injection temperature 175 ℃, injection speed 95%, injection working pressure 500kPa.