Performance and application of the most environmen

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Introduction to the performance and application of environmental friendly PLA

packaging is not only a research discipline, including materials, design, systems, equipment, etc., but also a very professional industrial and consumer application knowledge. I am a participant in the packaging industry. I hope that through this article, as a pure market user, I can communicate with friends in the packaging industry or interested readers, Share some information about the latest environmentally friendly polyester packaging material in the market: Poly latic ACI (PLA) polylactic acid

environmental protection and greening are important issues of common concern to all countries and mankind around the world. Environmental protection has evolved from the scope of application to enforcement, and personal attention to the political level. Paying attention to environmental protection issues, whether air, sound, waste, and so on, is both a crisis and a business opportunity. The polylactic acid introduced in this paper is the rebirth packaging material of the new technology and the old topic

The research and development of PLA originated in the United States. The applicable raw materials are natural crops, mainly corn mentioned in this article. Now the resin sheets widely used in packaging in the market, including PVC, PE, PP, pet and so on, are all petroleum auxiliary products. In the sense of the crisis of soaring oil energy prices and energy depletion, it is a normal and urgently needed way to find other energy substitutes, including auxiliary products

first, performance analysis

pla is popular again for two reasons. First, the high crude oil cost narrows the cost difference between the two. The adaptability of biodegradation provides corn PLA with market vitality and a new way out for new packaging materials. Corn PLA has the physical properties of general polyester packaging materials, its unique degradation ability, and its particularity or advantages different from general resins:

(I) adaptability: it has the adaptability to general petroleum resins, which can appear in bundled films or as thicker sheets, and can be produced by injection molding or blow molding at the same time. However, attention should be paid to the possibility of whitening at the folding position

(II) color: the basic tone is transparent, but yellowing will occur under high temperature

(III) density: slightly higher than pet environmental protection film. Please contact the supplier for specific data

(IV) printability: it has a wide range of properties and can be used in offset printing, silk printing, bronzing printing, etc., but it is necessary to be careful of surface scratches or abrasions during production

(V) fitting ability: it can be used for blister packaging production, which should be able to fit with other petroleum resin products, but the difference of temperature adaptability should be considered

(VI) environmental conditions: the manufacturer suggests that the applicable temperature should be below 60 ℃, otherwise the material will soften. Care should be taken for the protection and stacking of items, and the negative impact of temperature changes during transportation. Low temperature application is not specified, but it should be able to be used normally below 0 ℃

(VII) food application: it complies with the food safety regulations of some countries. As far as we know, the people's Republic of China has not made a positive description of this material. Due to the operating conditions below 60 ℃, it is estimated that it can only be used in the medium and low temperature application market, and the process requirements for high-temperature heating, sterilization and disinfection of food packaging may not be suitable for use

(VIII) recycling: PLA can be directly sold to CDW (6) 0 low-temperature tank nationwide like other resin materials Jinan new era assay instrument Co., Ltd.: the material can be recycled and recycled for manufacturing, but it cannot be mixed with other resin materials, and the regeneration conditions are relatively restrictive

(IX) degradation ability: This is an important selling point of PLA, and it is also the most noteworthy. According to the manufacturer, under the temperature of 60 ℃ and humidity of 95%, combined with appropriate microbial culture, it can be degraded to 95% in about 60 days, and finally it can be degraded into carbon dioxide and other microorganisms

(x) price cost: Although the cost is high, we also need to pay attention to the inevitable existence of new varieties, new prices and high profits. I still don't have the official market price information, but according to the reference data provided by the manufacturer using the sheet, the price is about 120% - 130% higher than that of environmentally friendly pet

II. Application attention

the emergence of new materials is in response to market demand, and their future existence or universality depends on the vitality of the product itself, connecting the damaged areas together, or technological transformation, or changes in market demand. While promoting environmental awareness and educating citizens, some countries also have legislation to enforce it, and some also use the cost increase method of levying environmental protection tax on materials to encourage the market to use environmental protection materials. As a new generation of environmental protection packaging materials, PLA has attracted the attention of a small number of international buyers. Unfortunately, the supply of materials is tight at present, and there are few domestic manufacturers that can carry out deep processing into packaging materials, especially sheet materials, In the short term, peers who use pla for customers may face high price competition

in addition, when materials are widely used, whether the supply of corn can be integrated may be another link worthy of attention, which is the best D-type. Biomedical materials such as automobile manufacturing, house doors and windows, 3D printing raw materials, artificial joints, intraocular lenses, etc. all come from plastics... Traditional plastics are seeking breakthroughs in environmental protection and high performance. Finally, I would like to share with readers a personal point of view here. The packaging industry is the main producer of individual waste. According to the supplier's instructions, the biodegradation ability of PLA is excellent, but in practical operation, The company or individual regional governments require that PLA can be recycled and provided with suitable degradation conditions at the same time, so that the advantages of PLA can be highlighted. The additional assurance cost is many, and it may be easier to know than to do

the relevant product information in this article is for readers' reference only. Please refer to individual suppliers for specific material data or related applications

reprinted from: Guangdong packaging magazine

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