Selection of Resin Different resin types have different gloss properties of their corresponding products. For PP, the random copolymer has the best gloss. For PE, LDPE is the best. For PVC, the suspension method is the best. For PS, HIPS is the best.
The greater the flow rate (MFR) of the characteristic solution of the resin, the better the gloss. The wider the molecular weight distribution, the worse the gloss of the article. The gloss of the resin having a high water absorption rate is also poor.
The choice of additives is the most important filler, followed by plasticizers, stabilizers and flame retardants.
The metal salt of the filler has the least influence, followed by calcium carbonate, and the largest is mica.
The shape of the filler is small in the shape of a sphere or a grain, and the influence of the needle shape and the sheet shape is large.
The smaller the particle size of the filler, the smaller the effect on the gloss.
The more the amount of filler added, the worse the gloss
The surface treatment of the filler is relatively inferior to the surface treatment.
Most plasticizers can increase gloss, but DBP exceptions
CaSt and BaSt in stabilizers reduce gloss, while PbSt and organotin improve gloss
All lubricants increase luster
Flame retardants reduce gloss
Plastic addition brightening method
Gloss agents such as polyethers, higher aliphatic hydrocarbons, amide compounds, bismuth heavy metals, surfactants, stearyl alcohol, etc.
External lubricant liquid paraffin, polyethylene wax, stearic acid, bis stearamide, silicone oil, etc.
Nucleating agent, phosphate, etc. 4. Special coloring agent, fluorescent whitening agent, etc.
Plastic blending brightening method, for example, adding PMMA and LLDPE to PVC to add LDPE
Plastic form control brightening method double-sound stretching technology, control processing temperature
Reduce the roughness of the molding equipment
Plastic surface stratification
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