With the increasingly tense world oil resources, people are forced to seek a partial replacement of petrochemical products with low -priced, extensive sources, easy processing, and environmentally friendly functions. Calcium carbonate has become the preferred variety in fillers with rich resources, low price, and good comprehensive performance. It is the most widely used inorganic filler in thin film processing. Adding appropriate calcium carbonate to the polymer can not only reduce costs, but also improve some aspects of performance and increase its added value. Many polymers can make membranes, and the application range of the membrane is very wide. It is mainly used as packaging materials, protective agricultural membranes, and ground membranes.
The application of calcium carbonate in polyethylene membrane
The film formation effect of polyethylene is better. Calcium carbonate's polyethylene membrane has improved the performance in many aspects. For example, it can improve: the mechanical properties of the film, the thermal stability of the product, the anti -fog drop performance of the membrane, etc., and can promote the degradation of the film. It can start in environmental protection in terms of environmental protection. To a positive role. In addition, after adding calcium carbonate, it can improve the humidity and freshness and breathability of polyethylene membrane. It is reported that the polyethylene film with calcium carbonate is the most widely used plastic packaging film currently in the most widely used and the largest amount of dosage, accounting for about 40%of the amount of plastic packaging film consumption.
The application of calcium carbonate in a polypropylene film
The film formation effect of polyethylene is better, and the membrane performance made of different varieties is different. Performance has improved, such as improving: the mechanical properties of the film, the thermal stability of the product, the anti -fog drop performance of the film, etc., and can promote film degradation, which can play a positive role in environmental protection. In addition, after adding calcium carbonate, it can improve the humidity and freshness and breathability of polyethylene membrane. It is reported that the polyethylene film with calcium carbonate is the most widely used plastic packaging film currently in the most widely used and the largest amount of dosage, accounting for about 40%of the amount of plastic packaging film consumption.
The application of calcium carbonate in polypropylene film
The film made of polypropylene material has good performance. In addition to a small amount of polypropylene film, most of them use two -way stretching The film that is highly oriented in technology. The two -way stretching polypropylene film is widely used in printing, composite, and adhesive tapes with its non -toxicity and excellent mechanical strength. In addition, calcium carbonate can also be used in a polypropylene microfil membrane prepared by armal separation. Because polypropylene itself has excellent performance, the microre membrane prepared by it has the high -efficiency separation capacity of the functional membrane and the plastic film of the plastic film. Excellent mechanical performance can be widely used in industry, medicine, energy, military and daily life.
Applications in polyvinyl chloride and its related varieties
Calcium carbonate can be used for polyvinyl chloride membranes. When the amount of its dosage increases within the specified range, it can increase the stretch of the membrane to stretch the film. Power and break -elongation. Calcium carbonate can also be used for poly -polye chloride membrane, carbonIn addition to adjusting the blocking performance of the membrane, the addition of calcium acid can also improve the processing performance of polyethyl chloride and the mechanical properties of the film. Calcium carbonate can also be used in polytic fluoride membranes. It uses armal polytic fluoride membrane prepared by armal separation. The pore rate can be changed by changing the content and particle size of calcium carbonate. the goal of. By treatment, the pore rate of the membrane can also increase the water flux and cutting rate of the membrane.
Preparation of calcium carbonate film
Due to poor compatibility of calcium carbonate and polymer, if it is directly added, the fillers are difficult to disperse and uniformly, resulting in difficulty in filling system processing, poor product performance, restrictions on the amount of filler, and the amount of filler. Essence To solve these problems, calcium carbonate is usually treated on the surface. Calcium carbonate after surface treatment is mostly combined with basic resins such as silane, titanate, or aluminate and other coupling agents such as surface treatment, physical entanglement, and Van Dewali. Compared with unchanged calcium carbonate, the modified calcium carbonate is more uniform in the resin, and the membrane performance is better.
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