Study on Environmental Protection of Superfine Calcium Carbonate Burnable PE Masterbatch

Abstract : The incineration PE masterbatch prepared by using 1,250 mesh calcium carbonate fillers, alumina vinegar coupling agents, incinerated thermal oxygen degradation agents, bioactive agents and Other additives was blown into shopping bags and garbage bags. After the accelerated aging test and outdoor exposure, the comprehensive environmental performance was characterized by infrared spectroscopy, high performance liquid chromatography, and thermal red instrument. The experimental results showed that the film was adapted to the incineration of garbage, especially It is of positive significance to promote the rapid and complete burning of plastics and reduce the content of harmful gases in the exhaust gas. It can be used to dispose of incineration power generation garbage.

Keywords: ultrafine calcium carbonate PE masterbatch can be burned environmental performance

Foreword

As the world’s oil resources become increasingly tense, the price of petrochemical products has been increasing, forcing people to seek a partial substitute for petrochemical products with inexpensive, widely sourced, easily processed, and environmentally friendly inorganic minerals. Calcium carbonate is an inorganic material that has long been widely used. With the promotion and application of calcium carbonate in the plastics industry, its own excellent performance has also been gradually excavated, which has made great contributions to human society. The use value and environmental protection value of calcium carbonate in shopping bags or garbage bags has been recognized in developed countries (such as Japan), and is particularly used as a special bag for burning incineration waste. Most of the garbage bags used for garbage burning in Japan are imported from China. Some incineration power plants in China are also in operation and construction, but the value of the use of calcium carbonate filled garbage bags has not been fully understood.

As waste incineration power generation for energy recycling, it has been widely promoted worldwide. The plastic component, which accounts for 2%-3% of the total municipal solid waste, will play an important role in the incineration process. This is because with the continuous promotion of waste bagging, the burning rate of garbage has a greater relationship with the burning rate of the outer packaging. The inability of the garbage bag to burn in time will delay the burning time of the garbage in the bag, and the plastic components are easy to burn. Coking and clumping, which in turn impedes the full combustion of the internal plastic components, incomplete combustion of the plastic will lead to the production of a large amount of CO gas, and make the incomplete combustion part easily attached to the furnace wall and grate, for the garbage The circulation of the transport and air flow has an effect and has a certain corrosive effect on the furnace wall. The incineration garbage bags are used for the collection and disposal of bottled garbage, and then enter the power plant for incineration and power generation. In addition to requiring that the garbage bag has the performance of ordinary thin films, the plastic garbage bags are required to have good incineration performance.

The author of this article has succeeded in preparing polyethylene (PE) masterbatch with incineration performance. After adding 40% of incineration masterbatch in ordinary blow molding machines, it has stable processing technology, excellent dispersion, good finish, and smoothness. The feel and good printing performance. In this paper, the mechanical properties and comprehensive environmental performance of shopping bags or garbage bags blown with this masterbatch are characterized

2 Experimental Department

2.1 The main raw material for incinable calcium carbonate masterbatch

Calcium carbonate: Commercially available, 1250 mesh; incinerated thermal oxygen degradation agent and bioactive agent: produced by the Environmental Development Institute of Fujian Normal University; coupling agent: provided by Polymer Experimental Factory of Fujian Normal University.

2.2 The blowing of PE garbage bag film can be burned

40% of calcium carbonate incinerateable PE masterbatch and 60% of HDPE or LDPE are simply mixed (sometimes LLDPE can also be added), directly into the ordinary blow molding machine for processing and blow molding, and the process parameters do not need to be large Adjustments or changes. Process requirements Grinding mouth uniform, stable bubble shape, no white spots and impurities, film jitter sound crisp, bag welding solid, requiring no dust off.

2.3 Test methods

Artificial accelerated weathering test: high-pressure mercury lamp method, power 450W x 4, film and lamp distance 40cm, temperature inside the box is 65°C ± 5°C; outdoor exposure test: Fuzhou, Fujian Province, from July to September, the film sample is fixed The outdoor exposure frame was placed on the outdoor rooftop platform. The plane of the exposure frame was at an angle of 45 and the sample faced south.

2.4 Analysis Test

Mechanical properties test: according to the relevant standards for plastics performance testing; elongation at break retention rate: tested and calculated according to the standards stipulated by the National Environmental Protection Agency HJBZ12-1997; carbon-based index: adopting IR-408 model of Shimadzu Corporation of Japan Infrared spectrometer, using the baseline method to calculate the dial index of the film sample (CI = A1720 / A2020); thermal gravimetric analysis: Japan Shizuda Corporation DT-40 type thermal analysis system, air flow rate 50m1/min, heating rate is 10 °C / min.

(to be continued)