Chongqing Taiyue New Materials Technology Co., Ltd.

Polyvinyl Chloride (PVC) is an important synthetic material.

Polyvinyl Chloride (PVC) is an important synthetic material widely used in industries such as construction, power, and chemical processing. As an excellent plastic material, PVC boasts high economic benefits and significant application value. However, in recent years, environmental and health concerns related to PVC have drawn widespread attention.

The Impact of PVC Heat Stabilizers on Foamed Board Production

Before discussing the impact of PVC heat stabilizers on PVC foam boards, let’s first take a closer look at what PVC foam boards are. They are sheet materials characterized by a closed-cell foam structure and are widely used in various applications. However, during the manufacturing process, these materials often experience pore rupture. There are many factors contributing to this phenomenon, one of which is related to the selection and dosage of PVC heat stabilizers. Good melt plasticization is a prerequisite for producing high-quality PVC foam board products. If there are issues with the PVC heat stabilizer—such as improper performance or excessive extrusion temperatures—the melt may undergo localized degradation. As a result, the melt strength weakens, leading to excessively large bubbles that can easily tear apart. Extrusion temperature...

An Explanation of the Safety of PVC Composite Stabilizers

PVC composite stabilizers are widely used, and concerns about their safety are now receiving increasing attention. When studying the safety of PVC composite stabilizers, three aspects should be taken into account: first, the safety of those who process the raw materials; second, the safety protection measures for users; and third, the environmental safety of waste products. The safety protection for processors can be addressed through measures such as liquefying, pasteurizing, or granulating the stabilizers. As for safety protection for users, stabilizers can be made highly polymerized or prepared as reactive stabilizers to enhance their resistance to extraction. However, given that the stabilization process involves chemical reactions at the molecular level, the above-mentioned approaches are not the most suitable.

What issues should be taken into account when using matting agents? What’s the difference between matting agents and matting powders?

Depending on the intended application, matting agents may require powder coatings with either semi-gloss or matte finishes. To reduce the gloss of the coating film, commonly used matting agents include ultrafine silica, talc, aluminum stearate, calcium stearate, and low-molecular-weight thermoplastic resins. To achieve a matting effect, the following method can be employed: a) Mix powder coatings with different curing speeds using dry blending. The resulting coating film will exhibit significantly reduced gloss, thereby achieving a matting effect. Since the highly reactive powder coating cures rapidly, it hinders the leveling and reaction of the resin in the continuous phase, which has a slower curing rate, ultimately causing the cured coating film to lose its gloss. Although this method is effective, it increases manufacturing costs.

Issues with Pigment Carbon Black in Plastic Applications

The basic properties of pigment carbon black—such as primary particle size, structure, porosity, and surface functional groups—have the following effects on plastic performance: 1. A smaller primary particle size (and thus a larger specific surface area) of pigment carbon black can: (1) enhance the blackness of the carbon black; (2) improve its tinting strength; (3) strengthen its resistance to ultraviolet radiation; (4) increase its electrical conductivity; (5) elevate the viscosity of the plastic; (6) reduce the dispersibility of the carbon black; (7) increase the water absorption capacity between the carbon black and the plastic. If the dispersion and stability of pigment carbon black fail to meet application requirements, this will directly affect...

How to Use UV Stabilizers in Water-Based Coatings

In addition to high efficiency, UV stabilizers must meet several basic yet critically important requirements. To achieve this high level of efficiency and complete compatibility, UV stabilizers must exhibit excellent solubility in the film-forming base material. This necessitates that they possess both high performance and low volatility—particularly when used in baking coatings. While exhibiting these properties, UV stabilizers must not cause any adverse side effects, such as discoloration, reactions with other components in the coating, or interference with crosslinking. For obvious reasons, UV stabilizers must be water-repellent, since in situations involving settling, condensation, moisture, or other conditions that generate water, the stabilizers could easily be leached out of the coating film. However, in water...