In recent years, the contribution made by China in the development of greening has drawn worldwide attention. Many people will pay attention to the aura of the news itself, but seldom ask the story behind it. We know that the foundation of afforestation is excellent forest seedlings. How do seedlings protect supply in the face of major ecological projects? Behind this is the contribution of the tree germplasm resource pool. The main function of forest germplasm resource pool is the collection and arrangement of forest germplasm resources, and efficient use. The tree germplasm resource pool not only enables effective conservation of excellent tree germplasm resources that exist in nature, but also enables efficient use, provides excellent genetic materials for forest tree breeding, satisfies the renewal requirements of varieties, and promotes excellent germplasm resources. The innovation of resources has helped the development of the nursery stock industry, so it can be said that the tree germplasm resource pool provides a strong impetus for the development of green China. The quality of seedlings is an important issue affecting the construction of green China. The seedlings are inferior, the plantation forests are inferior, and the afforestation and afforestation results are poor, affecting the process of promoting the construction of ecological civilization and even the speed of economic and social development. Therefore, we must promote the development of green China. To improve the speed and quality of construction, it is necessary to further develop forest seedlings and to provide excellent seed resources for the construction of green China. The application of forest germplasm resource pool has important significance for the protection and utilization of resources, effectively improving the efficiency and quality of modern nursery stock breeding, and greatly improving the utilization rate of improved varieties. For a long time, the problem faced by forest tree seedlings cultivation is that the production cycle is long, and it takes more than ten years or even longer from breeding to thoroughbred production. Now, with the application of forest germplasm resource pools, a large number of excellent tree germplasm resources can be used by breeding experts, so the development of breeding work has become more efficient, which not only effectively promotes the integration of production, management, and scientific research, but also enhances The transformation level of seedlings' scientific and technological achievements has played a major role in improving the utilization rate of improved varieties of forest trees and improving the supply of fine varieties of forest trees. It is a practical approach to advance the process of improving seedlings in China's forestry, developing modern forestry, building ecological civilization, and promoting scientific development. The important move. Polypropylene (PP), as one of the five general plastics, is widely used in daily life. PP Resin,Polypropylene,PP Granules,PP Plastic Granules HENAN JINHE INDUSTRY CO.,LTD , https://www.speciatyelement.com
Polypropylene is a plastic raw material with minimal density, and its appearance is colorless and translucent particles. As a food grade plastic, it is widely used in food packaging, such as foam plastic boxes, PP plastic cups, and so on. Polypropylene can be divided into five categories according to its main uses: PP injection molding, PP drawing, PP fiber, PP film, and PP pipe.
1. PP injection molding:
PP injection plastic is mainly used in small household appliances, toys, washing machines, auto parts, etc.
In recent years, the improvement of people's living standards and the implementation of China's second tire have led to a gradual increase in the demand for polypropylene injection molding in the downstream. Different injection molding varieties also have differences in their demand in the low and high seasons. For example, the demand for injection molding pots and barrels is relatively strong in the school season, while the demand for accessories and gifts is booming due to the impact of many festivals. In general, PP injection molding is relatively frequently used.
2. PP wire drawing:
Polypropylene wire drawing is mainly used in plastic woven products. The daily use of container bags, woven bags, food bags and transparent bags are all PP wire drawing products.
Since the implementation of domestic environmental protection in 2017, the demand for packaging of cement and building materials has been declining, and the plastic weaving industry has been greatly impacted. Accordingly, the PP plastic weaving market is under pressure. In the future, the proportion of PP plastic weaving in the overall use of polypropylene will continue to decline, and the plastic weaving industry will gradually expand into large packaging bags with high capacity, high quality or small packaging bags with low capacity and low content.
3. PP film:
Polypropylene film is generally divided into BOPP film, CPP film and IPP film. PP film is mainly used for food packaging.
Compared with PE packaging bags, PP film food packaging bags have better transparency, greater hardness and more high-end appearance. Downstream demand is mainly concentrated around festivals and holidays.
4. PP fiber:
Polypropylene fiber is a kind of fiber product made from polypropylene by melt spinning. It is mainly used in decoration, clothing and other fields. Since the implementation of the second child in 2011, the downstream wet wipes, diapers and other maternal and infant supplies have increased sharply, and the domestic fiber material has been in short supply.
According to data statistics, the global demand for fiber will continue to grow significantly, and the composite annual growth rate is expected to be 2.6% from 2017 to 2025. Therefore, the downstream demand for PP fiber will continue to grow in the later period.
5. PP pipe:
PP pipe material is mainly used in water supply and heating systems due to its non-toxic and high-temperature resistant properties. Compared with PE pipe material, PP pipe material has light weight, convenient transportation, good environmental protection performance and can be recycled.
Forest germplasm resource pool provides impetus for green China's construction