Modified PP packaging materials 2

3.2.5 Colorant: Inorganic and organic dyes, etc., dosage 30%-0.8% (brightener, titanium dioxide, phthalocyanine blue, benzidine yellow, plastic red, etc.).
3.2.6 impact modifier: The amount of 1% -10%, while most of PP using polybutadiene and olefin (PE) thermoplastic elastomer to improve the PP sheet or film tear strength and anti-brittleness.
3.2.7 Flame Retardant 1 Addition Type;
2 reaction type.
The dosage is 0.1%-0.5%. For example, aluminum hydroxide, antimony trioxide and organic hightata flame retardant tree wax, such as polyvinyl chloride.
3.2.8 Antistatic agent, generally 1%-5%.
3.3 Processing Additives Processing additives are generally 0.05%-0.25%, while PP films are rarely used.
3.3.1 The application of foaming agent processing additives in PP film is usually divided into: 1 there is a physical foaming agent, generally choose low-boiling alcohols, ethers, ketones and aromatic hydrocarbons; 2 chemical foaming agent, with carbonic acid Hydrogen sodium, AC and so on.
3.3.2 Lubricants: The amount is 0.01%-0.1%, often fatty amides and hydrocarbons, etc. The addition of this agent can often migrate to the surface of the printing ink film, so use caution.
3.3.3 processing release agent: The amount of 0.01% -0.1%. PP materials often use organic silicon compounds, fluoropolymers, and polyethylene wax as the target.
3.3.4 Hydrogel adhesives: 1 The traditional method is to add talcum powder on the carrier, but it often leads to excessive dust and pollutes the workshop environment. 2 Most of the fatty acid metal salts can be introduced into the PP film system.
3.3.5 slip agent: 1 often low-cost talcum powder as a post-print additive; 2 is now used more oil, erucamide organic additives directly in the PP ingredients added.
3.3.6 Compatibilizer: PCL, which is often regarded as the third component, can be used in the PP system.
3.3.7. Perfumes: P-type which can be applied to PP is preferred.
3.3.8 Tackifiers: Suitable for PP packaging and printing auxiliaries are: 1 dimerized wood rosin (softening point 145°C); 2 poly(B-pinene) terpene resin (softening point 115°C).
3.3.9 There is also a need for electrically neutral superdispersants to be explored.
3.4 The amount of reaction control agent is often controlled between 1% and 5%. As shown in 3.4.1 3.4.1 Catalysts: Most systems can be composed of TiCl4 or TiCl3 or AI(C2H5)3. This is a type of substance that can change the speed of a chemical reaction without itself being consumed in the reaction. So far PP has not found one of the most effective additives and stereotypes.
3.4.2 Initiator: Its role is different from 3.4.1;
3.4.1. To date, there is no complete theory on PP application to explain clearly.
3.4.3 Inhibitors: The purpose is to remove the PP prior to polymerization so as to avoid post-induction periods. The phenols, oximes, etc.
3.4.5 Crosslinking agent: Diisopropylbenzene peroxide is commonly used in PP materials.
3.4.6 Auxiliary materials are mostly white oil deeper.
3.4.7 Anti-mold agents: There are 1 pentachlorophenol: 2 organic mercury compounds; 3 copper, etc. to improve the deterioration caused by microorganisms.
3.4.8 Chain transfer agents are thiols used to adjust the molecular weight of PP.
3.4.9 Terminating agents: Such as chlorine and simple hydrocarbons to terminate the chain growth of polymer free radicals.
3.4.10 There are chemical reagents that can control the PH value of PP materials, etc. This article will not repeat them here.
3.5 The scope and content of the study.
(1) Aside from the additives, we remove the chlorine species from ethylene-related molecules to prevent the formation of fog and haze when the PP is exposed to flash (metal) printing inks. Therefore, the more complete the dechlorination, the less chance of fog generation - and the more transparent it is.
(2) The use of high-purity aromatic phosphorous ester antioxidants is significantly better than aliphatic pentaphosphates, which suppresses the oxidation of PP dust and pollutes the environment.
(3) Incorporation of a small amount of base to improve its storage stability.
(4) Adding a certain amount of water-resistant wax or other suitable hydrophobic compound and increasing the molecular weight of the metal purifying agent or introducing into its molecule genes that are compatible with PP to improve its sublimation and blooming properties...
(5) How to ensure the reuse of PP and improve the extensibility of human resources.
4 Conclusion In ancient and modern times, consumers are ultimately concerned with environmental protection and commodities are accepted. But the carrier that becomes the other half of the combination of quality and environmental protection is: the integrity of the art of packaging and printing, so that it can satisfy the competition of the packaged goods; thus it is possible to import internationally certified rivers and stand in the market economy. The tide of competition is to concentrate on high technology, conquer consumers, and achieve the purpose of creating profits. (Finish)