Application of the hottest nano PET Bottle New Tec

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Application of nano PET Bottle New Technology in beverage packaging

as a pillar industry of China's national economy, beverage packaging has a promising market, which can not be ignored

with the continuous development of technology, the modified PET bottles have excellent performance of blocking and shielding carbon dioxide, oxygen, water, and fragrance, and have the advantages of high impact resistance, high strength, heat resistance, high compressive strength, high transparency, high artistry, high purity, high cleanliness, good machinability, good formability, good dimensional stability, chemical resistance, moisture absorption resistance, light weight, etc, Low cost. Therefore, it has been widely used in beverage packaging

first, nanotechnology to improve permeability/heat resistance

German Krupp corplast, Japanese toyoseikan and American plasticsolutionsmolding have developed their own nano thermal setting technologies called "monotherm", "s-cosmos" and "CR yopak" respectively, which can significantly improve the crystallinity and heat resistance of PET bottles, for example, from about 20% and 85 ℃ to 39% ~ 42% and 120 ℃ respectively, It is suitable for the packaging of pasteurized beer after filling, without the use of reinforcing ribs and reinforcing plates. These heat setting technologies need to be combined with barrier coating technology to make the beverage meet the required shelf life

the Institute of chemistry and the Institute of physics of the Chinese Academy of sciences have found another way to explore and study the pet/montmorillonite nano composite initial stress material and its application. It has been used to make translucent beer bottle samples, which have 3-4 times higher permeability than PET bottles and improved heat resistance

polyethylene terephthalate (PET) is mainly used in fibers, bottles and films, and the amount of engineering plastics accounts for only a small part of its total output. As an engineering plastic, PET resin has attractive properties, but it is difficult to meet the needs of rapid prototyping in industry due to its poor melt strength, slow crystallization speed and poor dimensional stability. Major companies in the world have invested a lot of human and material resources to develop various rapid crystallization nucleating agents, which improve the crystallization rate of pet. However, the high price of these nucleating agents restricts the large-scale application of PET engineering plastics. Pet nano plastic (npet) was successfully prepared by adding organic montmorillonite and pet monomer into the polymerization kettle with the pet polymerization intercalation composite technology invented by the Institute of chemistry, Chinese Academy of Sciences. The melt viscosity and crystallization speed of npet are significantly improved, which overcomes the common "flowing" defects in the processing of ordinary PET resin, and improves the processing properties of materials and product properties. Compared with ordinary PE, which reduces the length t of the data line as much as possible, the flame retardant performance of npet has also been greatly improved, and it has self extinguishing design, and a set of special device is extinguishable. The reinforced flame-retardant npet engineering plastics developed in combination with npet has been tested by authoritative departments, and its performance indexes have reached or exceeded those of PET engineering plastics products at home and abroad. It can be used to make various electrical components to replace the expensive polybutylene terephthalate (PBT) resin. The barrier property of npet is much better than that of pure PET. It meets the requirements of food packaging and can be directly used to blow bottles of beer, beverages, pesticides and cosmetics

second, nylon nanocomposites are used in PET containers

according to European chemistry in the UK, Eastman Chemical Co., Ltd. and nano Cole Co., Ltd. have jointly developed and successfully used in the manufacture of multi-layer PET containers and Nylon Nanocomposites. This material has high barrier property, processability similar to pet, and can be bonded to pet. It has now begun trial sale. The application scope of this high barrier PET container includes beer bags. As long as you want to see machine packaging, carbonate soft drinks, fruit materials and food packaging made of tomato processing. Products made of nanocomposites can be processed on existing equipment, such as preform injection molding machines and stretch blow molding machines

the oxygen barrier property of Nylon Nanocomposites under development has been greatly improved. Compared with general barrier nylon bottles, nylon nanocomposites containing 10% - 30% clay by weight have much better barrier property, and the thickness of barrier layer is greatly reduced. The turbidity of this material is 15% - 30%, which can be used to make amber containers. However, turbidity needs to be reduced so that this material can be used to make transparent packaging containers. The cost performance ratio of nanocomposites is very competitive, and clay has no impact on the recycling process. Therefore, nanocomposites have a wide range of applications

nylon nanocomposite aegisox, pamxd6/nano clay composite M9 and polyvinyl alcohol (PVA) membrane materials as raw materials of plastic beer bottles are the three most promising high-performance barrier materials

at present, Honeywell is committed to developing a nylon nanocomposite aegisox with high barrier performance and low cost as glass, which is an activation/passivation barrier material, in which nano clay is the passivation barrier layer, which acts in synergy with a suitable oxygen getter as an activator. It is said that the material can reduce the oxygen transmittance (OTR) of PA6 by 100 times, and the amount of oxygen added is almost zero. Some large PET bottle factories are using aegisox as the core layer of beer bottles with three-layer structure, and its price life can reach 180 days

eastman chemical company has also developed a nylon nanocomposite barrier material pamxd6/nanoclay barrier material M9, named imperm, in cooperation with American nanoclay manufacturer nanocor. The oxygen permeability of imperm is said to be 50 ~ 100 times greater than that of pet. The nano clay particles can also increase the melt strength and bottle rigidity. Compared with the standard pamxd6, the barrier rate of carbon dioxide and oxygen is increased by 50% - 70% respectively, and the transparency and peel resistance are the same as the standard pamxd6. The company tested 25 kinds of 29g pet/impact/pet three-layer bottles, and their barrier layers constituted 4% and 10% of the bottle wall respectively. The oxygen permeability of the former is 3 ~ 5 times higher than that of PET bottles, with 8% less atomization. The oxygen permeability of the latter is 6 ~ 11 times higher, with 15% less atomization. The uses of these high barrier PTE bottles include beer, carbonated soft drinks and fruit juice. The three-layer structure (pet/m9/pet) beer bottle can reach the shelf life of beer in the United States (110 days) and Europe (180 days)

III. blend and blend nano materials

nano materials are materials composed of crystals with a grain size of 1 ~ 100nm. Because the grain size is much smaller than that of conventional materials, the number of atoms at the crystal interface is more than that inside the grain. This gives nano materials many special excellent properties, such as montmorillonite filling. Because the fine grains are integrated into the polymer lattice array, The sheet silicate layer will hinder the flow of dispersed molecules in the material diffusion channel, thereby improving the barrier property of the material

polymer/clay nanocomposites can be treated with conventional thermoplastic processing equipment. Because natural montmorillonite is a hydrophilic material, which is incompatible with most organic polymer materials, it is possible to obtain montmorillonite that is hydrophilic to organic molecules by using organic cations to replace sodium or calcium ions in the interlayer space. The cross reaction of organic ions with ammonium ions or phosphorus ions can form the surface of organophiles. Ammonium ethoxide can reduce the surface energy of inorganic matrix materials, improve the wettability of the surface, and is conducive to the interface between polymer and clay materials

the structure of nanocomposites can be divided into two types: sandwich type and lamellar type. In the former, by inserting a single extended polymer chain into the middle of each base layer of silicate, a neatly arranged multi-layer sandwich structure composite material can be obtained. In the laminated or layered composite material, the superposition between the layers is separable, and the single silicate layer is dispersed in the polymer matrix. Polymer/silicate nanocomposites can be made from a variety of polymer materials, such as polystyrene, polypropylene, polyamide, epoxy resin and plexiglass

a small amount of nano materials can obtain high barrier property, and 2% montmorillonite can reduce the permeability of Polyimide by half. Adding a certain proportion of lamellar silicate into nylon-6 can also give nylon excellent oxygen barrier properties and mechanical properties. Compared with the traditional nylon-6, this material has a more uniform oxygen barrier layer, better air permeability, doubled the oxygen barrier efficiency, reduced the oxygen permeability (OTR) by half, while other properties remain almost unchanged. Packaging containers made of such nano materials can also be widely used in beverage packaging

IV. nano polyester composite packaging materials

in order to improve the performance and application range of polyester packaging materials, Europe, the United States and Australia have carried out the trial production of polyester composite materials. The composite test of pet, pen and liquid crystal polymer (LCP) began in the second half of 1997. Superex polymer company of the United States first used pet/ad/lcp three-layer structure (AD is the adhesive layer) to make 330 ~ 600ml beer bottles in the world, and is jointly promoting and applying it with a distillery in Japan. At the end of 1997, hoechsttrevira company in Germany began to test pen composite beer bottles to confirm the market competitiveness of the beer bottles. Aslp company in Australia is developing a polyester multi-layer structure packaging container to extend the storage life. In 1997, Japan began to produce colorless nano transparent ceramic film/polyester advanced packaging materials. Toyo Steel Company of Japan invested 4billion yen to develop composite packaging materials with polyester film bonded on both sides of steel plate or aluminum plate, which greatly improved the protective performance and production efficiency of packaging cans

for polyester film manufacturers, they hope to introduce nanotechnology into the production of polyester film to solve the barrier problem. Enterprises producing plastic extrusion and blowing machinery and equipment need to solve the problem of combining nano montmorillonite with PP and PE on site, then making bottles with extrusion and blowing technology, and improving the barrier of packaging bottles

source: Guangdong packaging

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