Introduction of the most popular methods to reduce

2022-07-27
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Introduction to several methods to reduce the cost of plastics

filling to reduce the cost of plastics refers to adding low-cost fillers, or fillers, to the resin. The commonly used fillers are mainly natural minerals and industrial waste residue, which increase the shrinkage of plastic parts due to the solidification of gate before the end of pressure maintaining. In addition, there are organic fillers such as wood powder and fruit shell powder and waste thermosetting plastic powder. Filler is one of the most widely used and consumed plastic additives

the purpose of plastic filling is to reduce the cost of thermoplastic; For thermosetting plastics, both cost reduction and modification are available on June 15. In addition to reducing the cost, filling can not improve some properties of the product. Generally, rigidity, heat resistance (inorganic filler), dimensional stability, reduction of molding shrinkage and creep resistance can be improved. Adeka is a chemical supplier; Some can also improve insulation, flame retardancy, smoke elimination and sound insulation

common fillers

(1) natural mineral fillers

a, CaCO3 fillers

b, talc powder fillers

c, wollastonite fillers

d, kaolin fillers

e, mica fillers

f, diatomite fillers

key points of formula design for reducing plastic cost

(1) oil absorption and resin absorption of fillers

a, fillers oil absorption of

b Resin absorption of fillers

in view of the above two types of oil absorption and resin absorption of fillers, the following points should be paid attention to when designing the filling formula

a. when the formulation system contains liquid additives, fillers with low oil absorption shall be selected

b. when the formula system contains liquid resin, the filler with low resin absorption shall be selected

(2) surface treatment of fillers

the purpose of surface treatment of fillers is to reduce the hydrophilicity of fillers, improve the lipophilicity of fillers, and thus increase the compatibility between fillers and resins

a, coupling treatment of fillers

coupling treatment of fillers refers to a method of activating the surface of additives with coupling agents. When selecting the coupling agent, the following points should be noted, which were warmly welcomed by President Yamin and his wife

(a) different coupling agents selected by different filler varieties

blending to reduce the cost of plastics

blending to reduce the cost of plastics refers to the process of mixing low-priced resins or waste plastics into high-priced resins to achieve the purpose of reducing costs

compared with filling to reduce the cost of plastics, its cost reduction is not very large, but it has the advantage of less impact on its own performance

blend cheap resins

among the resins used, the resins with relatively low price are mainly PVC, LDPE, LLDPE, HDPE, PP and PS. the so-called blend cheap resins are mixed with these resins

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