UCWAX 110A is polyethylene wax. Its moderate molecular weight and relatively linear structure enable it to delay plastication, control surface precipitation, and improve demoulding performance during the processing of PVC products. It can improve the fluidity and lubricity of plastics and masterbatches, as well as the dispersibility of pigments and fillers. It has a relatively high crystallinity, which can achieve moderate external lubricity and improve glossiness in the production of PVC products.
Its main characteristics are as follows:
• Improve the glossiness of the surface of rigid PVC • Delay plastication of PVC products
• Improve the dispersion of fillers and pigments • Improve demoulding performance
Typical applications: masterbatches, suitable for rigid PVC products, such as profiles, pipes, pipe fittings, louvers, wood - plastic composites, pellets, etc.
Relationship between molecular weight and structure
The moderate molecular weight and linear structure endow UCWAX 110A with unique properties in the PVC system. The linear structure helps it to effectively interpenetrate and interact between PVC molecular chains. Its molecular weight is neither too large to be evenly dispersed in the system nor too small to lose the effective regulation of PVC processing performance.
Relationship between crystallinity and performance
The relatively high crystallinity is the key to achieving moderate external lubricity and improving glossiness. During the processing of PVC products, UCWAX 110A with high crystallinity forms a relatively regular structure on the surface of the product, which helps the reflection of light, thereby improving the glossiness. At the same time, this crystalline structure can play a certain role of barrier and lubrication when interacting with PVC molecules, achieving external lubricity.
II. Mechanisms of action in PVC processing
Mechanism of delaying plastication
During the processing of PVC, plastication is an important step. UCWAX 110A hinders the rapid and orderly arrangement of PVC molecular chains through physical adsorption and winding with PVC molecular chains, thereby delaying the plastication process. Unlike some strongly polar additives that overly interfere with the plastication of PVC, it adjusts the plastication speed in a moderate way, enabling PVC products to better maintain their shape and performance stability during processing.
Mechanism of surface precipitation control
Due to its molecular weight and structural characteristics, the solubility and migratory ability of UCWAX 110A in the PVC system are in a balanced state. It can be evenly dispersed during the processing of PVC products and will not produce precipitation on the surface due to excessive migration during use. This helps to maintain the aesthetic appearance and performance stability of PVC products, preventing surface pollution or performance degradation caused by precipitates.
III. Roles in different typical applications
Role in masterbatches
In masterbatches, the role of UCWAX 110A is particularly important. It can improve the dispersibility of pigments and fillers, making pigments more evenly distributed in the masterbatch. This is because it can reduce the agglomeration force between pigment and filler particles and at the same time enhance their affinity with the masterbatch matrix. When the masterbatch is applied to rigid PVC products, UCWAX 110A can also transfer its own lubricity and improved demoulding performance to the entire system, improving the processing efficiency and quality of rigid PVC products.
Role in profiles
For PVC profiles, the delayed plastication characteristic of UCWAX 110A can ensure the shape stability of the profiles during extrusion and other processing. The improved demoulding performance enables the profiles to be more easily removed from the mould, reducing the defective rate during production. At the same time, the improved glossiness also makes the appearance of the profiles more beautiful, making them more competitive when applied in fields such as construction.
Role in pipes and pipe fittings
In the production of pipes and pipe fittings, good fluidity is crucial. UCWAX 110A improves the fluidity of plastics, enabling pipes and pipe fittings to more smoothly fill the mould during extrusion molding, ensuring the dimensional accuracy of pipes and pipe fittings. Its characteristic of improving the dispersion of fillers and pigments also helps to improve the physical properties of pipes and pipe fittings, such as strength and weather resistance. Moreover, during the long - term use of pipes and pipe fittings, UCWAX 110A's control of surface precipitation can prevent impurities from appearing on the surface of pipes and pipe fittings, ensuring their hygienic performance and service life.
Role in louvers, wood - plastic composites and pellets
In the production of louvers, the lubricity of UCWAX 110A helps the opening and closing operations of louvers and improves their flexibility in use. For wood - plastic composites, it can improve the processing performance of wood - plastic composites, such as improving the formability during extrusion or injection molding. In the production of pellets, it improves the fluidity of pellets, facilitating subsequent molding processing operations and also helping to improve the quality and performance uniformity of pellets.
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