Recent studies by Milliken Chemical have shown that Hyperform HPN-68L is uniquely capable of reducing or avoiding the use of polypropylene in pigments for thermal deformation, cycling, and shrinkage changes.
New research highlights the use of Hyperform HPN-68L as an effective solution to the problem of nucleation of polypropylene pigments, allowing molders to achieve important improvements in productivity and component quality.
“Different pigments have different degrees of nucleation of polypropylene, resulting in different crystallization temperatures and shrinkage factors,†Angela Halstead, senior technical account manager at Milliken Chemical, said, “Mould makers and molders face several problems. , Including the difficulty of controlling different parts of the same color production, different colors need to use different molds and different cycle times, the mold must be reworked several times to achieve the final size, grinding tool production is more complex."
The Hyperform HPN-68L has been widely recognized for its ability to increase the processing speed and productivity of polypropylene through higher crystallization temperatures. Hyperform HPN-68L is also an effective solution to the problems faced by pigment manufacturers and their customers. Hyperform can overcome pigment crystallization problems and reduce or avoid side effects.
“Using Hyperform HPN-68L can effectively eliminate the pigment-induced shrinkage, and this can be found through the ever-improving equal shrinkage properties,†Halstead added. “The result is that the molders can work on different pigments in the same processing state. Using the same part size allows simplification of mold making, reduced mold rework, more flexible mold utilization, and fewer process adjustments."
The additional benefits of the Hyperform HPN-68L's pigment nucleation-eliminating effect are less waste, easier product ejection, less downtime, reduced or avoided mold closures, and design of home racks and weights to prevent component flexing.
In contrast, other grades of nucleating agents - traditional or advanced - are not effective at controlling shrinkage and thermal deformation, and actually produce increased thermal distortion, Halstead said. Although there are non-deformable pigments on the market, these products are very limited in the choice of color and are very expensive. In addition, these special pigments do not solve the problems of cycle change and dimensional change. H
Yperform HPN-68L is a nucleating powder and also has a masterbatch Hyperform Concentrate HI5-5. Color masterbatch can be mixed as needed.
The high-speed nucleating agent for polypropylene greatly accelerates the crystallization and Hyperform HPN-68L can improve the processing speed and productivity. Hyperform HPN-68L improves product quality by increasing dimensional stability, equal shrinkage, and physical balance. Hyperform HPN-68L also improves the physical and thermal properties of polypropylene to ensure the same strength of processed thin-walled parts.
Hyperform HPN-68L is used in bottle caps, auto accessories, patio furniture, DVD packaging, various recyclable plastic packaging, home appliance accessories and other cast or thermoformed products. Hyperform HPN-68L is a product of Milliken's Hyperform® nucleating agent series for polyolefins, as well as Hyperform HPN-20E for polyethylene.