With its raw material 2,6-dicarboxylic acid synthesis technology breakthrough, foreign ICI, Shell, Amoco, Eastman Chemical Company were waiting for production and accelerate the application of research. Currently used in food, beverages, pharmaceuticals, cosmetics, etc., such as small-sized carbonated beverage bottles, fruit juices, mineral water, milk, beer bottles, baby food ( potable sterilization ) packaging, requiring high barrier, radiation resistance and chemical resistance Drug-based pharmaceutical packaging requires high strength, impact resistance, chemical resistance, and high barrier industrial packaging. In beer and beverage packaging, it has made up for the defects in PET and glass and has become a hot topic in recent years.

Some countries in Western Europe have already begun to use PEN beer bottles in the market. Their preservation effect is the same as that of glass bottles. It is impact-resistant and easy to recycle. In recent years, China has also conducted a number of studies, such as Yizheng Chemical Fiber Company Products Technology Development Center of PEN synthesis and process optimization, Guilin Electric Division also try synthetic PEN. At present, the development of raw material synthesis technology is not mature. Many research institutes in China are conducting research, but no breakthrough has yet been made. In addition, companies plan to introduce foreign raw material production technologies to synthesize PEN .

In spite of the considerable improvement and improvement of PEN synthesis technology in recent years in foreign countries, the application cost is still high, so alloying has become one of the effective ways to expand the application range of PEN . On the one hand, under the premise that the PEN performance is not changed, the production cost is reduced. On the other hand, under the condition that the price increase is not much, the barrier property and other properties of the alloy are greatly improved. The current PEN alloying research has become a hot topic in the packaging industry. Because PET is similar to PEN in structure, rich in sources and cheap, it is widely used in the packaging industry. Therefore, PEN/PET alloys are the most studied. The key to the PEN/PET blend molding is the compatibility of the two, and its measurement index is the transesterification rate, so it is very important to choose a reasonable transesterification rate. PEN/PET alloys can be modified on a stretch blow molding machine for PET to produce containers; copolymers of high PEN content and PET are copolymerized to form a variety of block copolymers that can be conventionally stretched, blow molded, injected The equipment is processed so that PEN is in a better position in the packaging field. At present, the use of PEN/PET copolymers and blends can make heat-resistant bottles, high barrier bottles, UV absorption bottles, thermoforming containers, and the like.

The Food Industry Network prohibits the reprinting of articles on this site. Other sites must contact the site before reprinting and despise shameless theft.

Pull Handle

BNF HARDWARE CO., LTD , https://www.bnfhardware.cn