Flax fiber reinforced polyolefin composites "- a brief description of the project of a project outline and background of plastic materials have become indispensable in the national economy an important class of materials, but with the increased plastic usage and waste volume, but also brought the problem of resources and environmental pollution problems. With the awakening of the "ecological consciousness", the increasing emphasis on environmental protection, health, over the years, people continue to develop a variety of resource conservation materials and environmentally friendly materials to replace existing materials. Development of environmentally friendly plastics and high-performance plastic composites has been an increasing cause for concern. Rational use of resources, sustainable development of the economy determines the development of new materials trends, future economic development opportunities will be more to give light, cheap, biodegradable materials, environmental pollution, materials and resource efficient use of technology. The project around the above purpose, the development of flax fiber reinforced polyolefin composite services in the plastics industry and social needs. Second, the purpose and significance of the research and development of flax fiber is a natural polymer, which is the length of the longest natural fiber, the fiber crystallinity, degree of orientation, a higher longitudinal elastic modulus, it is suitable for the resin matrix composites enhanced body. Hemp fiber composite materials processing, energy consumption, loss of processing equipment to help save energy. Its most prominent advantage is a biodegradable and renewable, which is unmatched by any other reinforcing material. Therefore, the development of the hemp fiber as a reinforcement of composite materials in environmental protection and resource conservation has an important significance. As a relatively new engineering material, linen / polymer composites are the most promising new materials, is one of the important research directions in Polymer Science and technology. Linen / polymer composites to meet the needs of the future economic development, both from the social environment, or from the social economy and sustainable development strategies to consider, are very necessary and urgent, with great significance three domestic outside the relevant conditions and trends, linen / polymer composites can be divided into two categories: Linen / thermoset plastic composites and linen / thermoplastic composite matrix resin. Flax fiber reinforced thermosetting resins, epoxy resins, polyester resins, phenolic resins and melamine resins. Domestic and foreign scientists have done a lot of effective work in the flax fiber reinforced thermosetting resin composites. Researchers flax fiber and unsaturated polyester, epoxy resin composite, made of composite materials, and morphology and mechanical properties of composites were studied, the results show that the tensile and bending properties of composite materials have been improved. and the mechanical properties of the latter is superior to the unmodified original plastic. Flax fiber reinforced thermosetting resin composite material in the foreign industrial production, domestic and small production. Thermosetting plastics processing cycle, after curing, can no longer melt, while the density of the composite, easy burning and other shortcomings, thus limiting its application. In recent years, the use of thermoplastic and natural hemp-fiber material can be repeated melting compound, especially linen / thermoplastic composite materials has aroused people's attention. Compared with flax / thermoset composites, the toughness of flax / thermoplastic composites, impact resistance, short processing cycle can be repeated processing and recycling, and its applications continue to expand, can be applied to the automotive industry, interior decoration materials and daily life and other areas, known as 21st century green industrial materials. Flax fiber-reinforced thermoplastic resin-based polyolefin resin. The main advantage of the polyolefin resin is better processing performance, molding process is simple, excellent tensile and impact properties, flax, on the other hand, light weight, toughness is good, cheap, can reduce the cost of composite materials. Flax fiber in the hydroxyl form strong intermolecular hydrogen bonding, covalent bonding or other chemical bonds with the matrix polymer, fiber unreacted hydroxyl formation of intramolecular or intermolecular hydrogen bonds, and flax fibers have hydrophilic moisture rate of 8% to 12.6%. Causing poor adhesion between the fiber and the matrix polymer, thus making the fiber reinforced material over time in the course of lifting bonding. Flax fiber in the enhanced C-H polymer, the flax fiber is difficult to polarity and C-H polymer compatibility, enhanced fiber is incompatible with the matrix polymer of two materials, it is difficult to form reinforced composites. The lack of good interfacial adhesion caused by the adverse effects of the interfacial tension of the increase in material porosity and environmental degradation. Linen / polymer composite-based domestic and international research trends we can see, linen / polymer composites is still in the research and exploration stage, the linen modified approach and its matrix resin composite process reports less, so the surface treatment technology and flax linen / polyolefin composites and its products, development and applied research is of great significance. , Pre-developed after many years of international advanced technology to keep track of, combined with the development of related disciplines, using a modified method for processing flax, polyolefin blend processing and preparation of flax and PE, PP and PVC, etc. The resin preparation of flax / polyolefin composites. Composites depends largely on the interface between the performance of components and component compatibility. The heterogeneity of the flax fiber and fiber and the hydrophobic polymer matrix incompatibility, its enhanced role in the composite have an adverse impact. The heterogeneity of the flax fiber is the parts of plants, plant growth regions and growing conditions caused by different composition and structural differences. After years of exploration and research, we can surface modification of flax fibers to improve the compatibility of the fiber and the matrix to determine the flax composite surfactant treatment, surface grafting modification of the basic parameters of the two processing methods and The basic process. Improve the interfacial adhesion between fiber and matrix, and mechanical properties of the composites increased with increasing fiber content, when the flax fiber content of 25%, the tensile strength increased by 30%. Flax fiber reinforced polymer can not only improve the creep resistance and fatigue resistance, tensile properties increased with increasing fiber volume fraction, fiber volume fraction of 50% of the plates optimal performance. Handled in two ways to change the surface properties of flax fiber and surface free energy, to improve the interfacial adhesion of flax and PP, flax / PP composite tensile strength and impact strength, bending strength also increased, while with increase in processing time, the better to improve the mechanical properties.
Project Name: 2000 tons of plastic packaging film production line expansion project projects need to: polyethylene shrink packaging films with non-toxic environmentally friendly, recyclable, high transparency, shrinkage, good gloss, good toughness, and many other features now has been widely used in the cluster packaging of various products in recent years, the demand surge, and gradually replace the traditional cardboard boxes and plastic turnover box. Using the cluster packaging of plastic film, packaging and low cost; toughness, can effectively reduce the explosive bottles injury accident; can solve the problem of pollution of the surface of the memory bottle Plastic crates in circulation and stacking process, can be widely applicable in glass bottles, plastic bottles, metal cans and cartons and other beverage, canned food, daily chemical, household appliances and packaging. Recyclable and strong, to conform to the development of circular economy; new packaging forms and can give consumers a fresh, new feeling. The market for plastic film demand is greatly increased, very optimistic about the prospects of plastic film packaging. Beautiful and durable polyethylene heat shrinkable packaging films, resource conservation, recycling at home and abroad extensive use of various industries, especially in recent years, demand surge, the only Japanese market demand amounted to 16,000 tons, the United States, Western Europe market big. Developed its domestic economic restructuring and high labor costs of film production enterprises, in turn have imports from developing countries. Dalian special geographical location, a good social environment and opening up economic structure, created a good opportunity for enterprises to expand export markets. The advantages and importance of the construction of the project: At present, through the introduction of foreign advanced technology enterprises after years of practical experience summary, has completed the re-development of the plastic film technology innovation, as in conventional shrink film production technology and equipment on the basis of transformation of the traditional production line, anti-aging, readily biodegradable, various types of functional masterbatch, antistatic, antibacterial, anti-blocking, anti-rust products, use of the environment and packaging performance needs, add to the production of raw materials, play the most excellent packaging effect. Plastic film produced using the three-layer co-extruded membrane technology, and functional masterbatch distribution concentrated in the inner or the outer film surface, you can save the cost of production; the mechanical properties of the three-layer co-extruded film is better than single-layer film; power consumption directly affect the production of profits, extruder work so add the lubricity of the masterbatch extrusion current can be greatly reduced, saving energy consumption, is energy-efficient packaging of new products, products of the project is technically in the leading domestic level, a partial substitute for imports of similar products, a significant expansion of production capacity, you can export. Recent years through the development enjoys a high reputation in the cluster packaging products industry to open up foreign markets, exports increased year by year, the indirect exports has reached $ 300,000 in 2007. Especially after China's accession to the WTO, with the development of economic globalization, foreign industry to transfer to China the industry, the company has created rare development opportunities. Foreign manufacturers, especially South Korea, Russia, Japanese companies have come to seek to expand cooperation and increase supply, but due to limited production capacity can not meet customer requirements, new 2000 tons of plastic packaging film production lines around the corner. Good prospects for the domestic market, shrink packaging films have been widely used, and the urgent need to strengthen market development. To achieve economies of scale, resource conservation, and constantly improve the technical content, variety, the company key to achieving sustainable development. In summary: The project market potential, the production technology is mature and reliable, and prospects for development. Completion of the project will stimulate regional economic and industrial development, its economic benefits are substantial, and a strong anti-risk capability and profitability. Therefore, the project is feasible. At present, our products are in short supply, especially after the co-operation with the China Resources Group, the market further broadening, the annual demand of target customers in more than 3000 tons for the occupation of a broader international plastic packaging film market, and satisfy the international and domestic market demand enlarge our company, to drive the development of the plastics industry, especially the introduction of this project.
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