EN
The surface finish (smoothness) is an important quality characteristic of numerous manufactures, e.g. Automotive interior plastic components, household appliances, paints and coatings, paper etc. It requires a perfect flowing of surface without defect. That needs a correct formulation with properly functional additives. In the manufacture of automotive parts, household appliances, paints/coatings and paper, talc powder-characterized by its platey structure and inherent lubricity has proved itself as an effective candidate. Hebei Hezhen Industrial Co., Ltd. is mainly engaged in crushing and marketing non-metallic minerals, including talc powder. Hebei Hezhen has 60+ engineers and college-educated staff, whose expertise is integrated with the local advantages and technological capability to produce talc powder that delivers a fine surface finish.
The Lubricating Properties of Talc
Talc is the softest mineral and it is 1 on the Mohs hardness scale. It is so soft to the extent that it provides natural lubricating properties to talc powder. When added to a material, talc particles can lower the friction between the processing equipment and the material. Talc-filled compounds are easier to inject into the mold cavities in plastic injection molding, which limits the shear stresses that may lead to the origin of surface defects. In coatings and paint formulations, the particles of talc are used to produce a smoother film, as they cause less drag between the coating and applicator. This lubricating effect also lessens the wear of the processing equipment, prolongs tool life, and the production remains constant. Hebei Hezhen Industrial Co., Ltd. adopts the modern advanced production technology in order to maintain the natural softness and lubricity of its talc powder.
Filling Surface Voids and Micro-Defects
At the microscopic level surfaces are almost never flat. A smooth finished surface indicates the surface is truly flat when, in fact it comprises of various microscopic pits and voids or indentations. These micro-indentations are filled using fine tale powder. Small particles in fine grade talc would find the way into these small indentations to form a uniform surface profile. The addition of talc to a primer or basecoat provides the surface profile to be flat prior to topcoating. The gaps between the chains of the polymers are filled by talc particles, in plastic components flow marks and knit lines are greatly reduced by the inclusion of talc particles. Hebei Hezhen Industrial Co., Ltd offers talc powder with optimized controlled particle size distributions for surface filling.
Reducing Surface Friction in Finished Products
Surface smoothness is not merely about how it looks, but also the feel and functionality. Talc powder gives plastic and rubber surfaces a smooth, silky touch which users perceive as part of a higher quality. Talc is used in products that slide on one another or against other surfaces, such as drawer slides, conveyor parts or packaging films, to decrease the coefficient of friction. This decrease in friction enhances functionality, lessens noise, and lengthens the life of a product. The talc powder grades provided by Hebei Hezhen Industrial Co., Ltd. balance fineness of the particles with aspect ratio to obtain an optimal combination of surface feel and friction reduction.
Improving Mold Release and Surface Replication
With injection molding and compression molding, the ease of the material to release out of the mold is a direct measure of the surface smoothness. Sticky materials that adhere to surfaces of molds may tear away leaving coarse areas or drag marks. Talc powder is an internal mold releasing agent. The talc particles on the surface decrease the adhesion between the part and the mold as the molded part cools and shrinks. In complicated parts that are deep draws and fine textures this release improvement can prevent scrap. Hebei Hezhen Industrial Co., Ltd. works very closely with plastic and rubber manufacturers to obtain the most loading of talc possible to get the greatest release.
Enhancing Coating Leveling and Gloss
The use of talc powder is a well-known ingredient that has been famous since time immemorial because it is an ingredient that manufacturers of paint and coatings use to make the surface smooth. Talc is applied in liquid coating to control rheology, and prevent sagging of vertical surfaces. As the coating is drying, the platy talc particles are in parallel arrangement to the substrate surface creating a smooth and flat film. The other impact of this orientation on light reflection is the increase in greater gloss and homogenous look. Talc is applied in powder coating because it increases flow and leveling effect during the cure process hence reduces orange peel and other flaws of surface texture. In industrial coating case where the metals, wood or plastic are coated, talc based smoothness prevents sanding and re-work. Talc powder Hebei Hezhen Industrial Co., Ltd. will provide controlled purity and whiteness, which will provide a coating color, clarity, and improve smoothness.
Talc powder increases smoothness of surfaces in many ways including lubricity, void filling, friction reduction, mold release and coating leveling. Talc is a soft and platy compound and can be well utilized as an additive in plastics, rubber, paint, and coatings, when surface properties matter. The Hebei Hezhen Industrial Co., Ltd. is very welcome to domestic and foreign merchants to trade with our company, to cooperate and see ways of co-development. We have the experience and capability of supplying talc powder that would be able to help in supplying you with a high level of smoothness of the surface.
