Antistatic adhesion-resistant slippery linear low density polyethylene composition and method of making the same

Abstract

The invention discloses an antistatic blocking resistant smooth linear low-density polyethylene composition based on LLDPE as base, which comprises the following parts: 0.05-0.2% opening agent, 0.05-0.3% smooth agent, 0.05-0.3% antistatic agent, 0.05-0.2% anti-oxidant and 0.05-0.2% manufacturing and heat stabilizer, wherein the opening agent contains inorganic blocking resistant agent or organic opening agent; the smooth agent is amide, soap or organic silicane; the main auxiliary anti-oxidant is hindered phenol and phosphorus anti-oxidant; the antistatic agent adopts composite pattern of non-ionic typed antistatic agent and ion-typed antistatic agent. The making method compress the following steps: adopting LLDPE as base; adding blended auxiliary material into graining stage; or graining auxiliary agent into mother grain; adding mother grain; manufacturing specific material.

Description

technical field [0001] The invention belongs to the technical field of plastic processing and application, and relates to an antistatic, antiblocking and smooth linear plastic composition; and a preparation method of the composition. Background technique [0002] Linear polyethylene (LLDPE) is a copolymer whose molecules have a linear structure. After the introduction of α-olefin monomers into the polymer, the resulting macromolecules contain a considerable number of branched chains, so their density is lower than that of high-density polyethylene (HDPE), and similar to low-density polyethylene (LDPE). The crystallinity, density, melting point, rigidity, air tightness and other physical properties of LLDPE mainly depend on short chain branches. Introducing long-chain branches into the main chain of the polymer can greatly improve its processing performance without compromising the physical properties of the product, and can also endow the polymer with elasticity and plastic...

AI Technical Summary

Problems solved by technology

Generally, the processing of blown film is single-screw extrusion equipment, and the effect of melt mixing is poor. The above composition must be produced into anti-blocking and smooth special materials before the production of film products; if uniform mixing is used to directly produce film products, To reduce production steps and costs, twin-screw processing equipment with good melt mixing must be used, which is not feasible in film product processing plants, or the investment in equipment must be increased

In order for HDPE to form uniformly distributed large crystals in LLDPE, the amount of modifier added must be relatively large, the amount added is 0.5 to 10 parts, and the preferred amount is 3 to 5 parts. If the annual output of a set is 200,000 Tons of LLDPE resin production equipment, the output of at least 20 tons / hour, after LLDPE molecular polymerization, add at least 100 kg to 2 tons / hour, preferably 600 kg to 1 ton / hour of HDPE in the granulation section, is It is very difficult; for resin manufacturers, LLDPE resins containing high content of HDPE molecules are produced, and then supplied to film manufacturers. LLDPE with this performance is not universally applicable