non woven polyester fabric manufacturer

 thermoplastic resin made from the polymerization of propylene. There are three isomorphs, irregularities, and irregularities in three configurations. Industrial products use isotactic compounds as their main components. Polypropylene also includes copolymers of propylene with small amounts of ethylene. Usually translucent colorless solid, odorless and non-toxic. Because of the regular structure and high degree of crystallization, the melting point of up to 167 °C, heat, steam sterilization products is its outstanding advantages. Density 0.90g/cm3, is the lightest universal plastic. Corrosion resistance, tensile strength 30MPa, strength, rigidity and transparency are better than polyethylene. The disadvantages are poor low-temperature impact resistance and easier aging, but they can be overcome by modification and addition of antioxidants, respectively.

non woven polyester fabric manufacturer

Features:
Non-toxic, odorless, low density, strength, stiffness, hardness, heat resistance are better than low-pressure polyethylene, can be used in about 100 degrees. Has good electrical properties and high frequency insulation is not affected by humidity, but becomes brittle at low temperatures , Not wear-resistant, easy to aging. Suitable for the production of general mechanical parts, corrosion-resistant parts and insulating parts. The common acid and alkali organic solvents have little effect on it and can be used for food utensils.
production method:
1 slurry method. Polymerization in diluents such as hexane is the earliest industrialized and also the most productive method ever produced. 2 liquid phase bulk method. Polymerization in liquid propylene at 70°C and 3 MPa. 3 gas phase method. The polymerization takes place under the gaseous conditions of propylene. The latter two methods do not use thinner, the process is short, and the energy consumption is low. Liquid-phase mass spectrometry has now shown its advantages of being behind.

non woven polyester fabric manufacturer
Molding characteristics:
1. Crystalline material, low moisture absorption, prone to melt fracture, long-term contact with hot metal easily decomposed.
2. The fluidity is good, but the shrinkage range and the shrinkage value are large, and the shrinkage holes, dents and deformations are easy to occur.
3. Cooling speed, pouring system and cooling system should be slowly cooling, and pay attention to control the molding temperature. Material temperature easy to orientate at low temperature and high pressure, the mold temperature is lower than 50 degrees, the plastic parts are not smooth, easy to produce poor welding, flow marks, More than 90 degrees warp deformation
4. The plastic wall thickness must be uniform to avoid lack of glue and sharp corners to prevent stress concentration.
Application

non woven polyester fabric manufacturer

 Polypropylene fiber for engineering
Divided into polypropylene monofilament fibers and polypropylene mesh fibers
High-strength, bundled monofilament or reticulated organic fibers processed from polypropylene, polypropylene, and reticular fibers by extrusion, stretching, web formation, surface modification, and chopped strands. The resistance to strong acid, alkali resistance, weak thermal conductivity, with extremely stable chemical properties. Adding concrete or mortar can effectively control the micro-cracks caused by the solid-plastic shrinkage, dry shrinkage, and temperature change of concrete (mortar), prevent and suppress the formation and development of cracks, and greatly improve the crack resistance and impermeability of concrete. The earthquake-resistance capability can be widely used in the waterproofing of underground projects, roofing, walls, floors, pools, basements of industrial civil construction projects, as well as roads and bridges. It is a new ideal material for cracking, seepage prevention, wear resistance and heat preservation of mortar/concrete project.

 non woven polyester fabric manufacturer
Biaxially oriented polypropylene film
Packaging materials occupy a very important position in plastic products. According to statistics, plastics used in the packaging industry in the world account for about 35% of total plastic consumption. China's packaging plastics have developed rapidly. The output has rapidly increased from 190,000 tons in 1980 to 4.65 million tons in 2003. It is expected to exceed 5.5 million tons in 2005, more than 7 million tons in 2010, and more than 9 million tons in 2015, accounting for approximately More than 13% of the country’s total packaging output.
From the product point of view, packaging films account for more than 50% of the total amount of packaging plastics. China's biaxially oriented polypropylene (BOPP) film is one of the largest areas of PP resin consumption. In 2003, China had 86 BOPP manufacturing companies (123 production lines) with a total production capacity of approximately 1.4 million t/a, and reached 200 in 2004. Million t/a (138 production lines), the output will exceed 1 million tons. In recent years, domestic enterprises have focused on improving product competitiveness and have successively introduced a number of advanced BOPP production equipment. The width of the produced film is up to 8.3m and the line speed is up to 400~500m/min. For example, Zhejiang Dadongnan Group introduced Brückner 6 in Germany. Million t/a production line; Guofeng Group invests 200 million yuan to introduce 35,000 t/a production line (currently Asia's first article and world's fourth article 10m wide BOPP equipment); Changzhou Wujin Jinshi Group introduces Germany 20,000 t/a Five-layer co-extruded high-strength and ultra-thin BOPP production line; Fujian Hyundai Group introduced 25,000 t/a production line; Baoshou Group planned to introduce 100,000 t/a production line. According to the conversion of China's existing BOPP film production capacity, the annual demand for PP resin is nearly 2 million tons. Therefore, it is necessary to pay attention to developing special PP materials with high line speed, extensibility, and good transparency for BOPP film, including supporting B. , C copol

non woven polyester fabric manufacturer