Qujing LLDPE-PE-135-American MDI material spot
The main disadvantages of Plastic are poor toughness, low impact strength, and insufficient melt viscosity. 3. It is used as a textile sizing agent, with stable sizing performance, less sizing, low rate of fabric breakage, and smooth cloth surface.
A few days ago, Jingxian Fenglin Engineering Materials Co., Ltd. has produced a new construction material. The material is made of rigid polyurethane resin foam reinforced with long glass fibers. It has light weight, high strength, and corrosion resistance. Characteristics. According to reports, general construction wood has poor water resistance, while cement materials have no advantage in weight. The newly produced (article source Global Polyurethane.com) structural material-synthetic wood is a lightweight, corrosion-resistant structural material reinforced with rigid urethane resin foam with long glass fibers. As a structural material, it not only has sufficient strength, but also has the same weight as wood. At the same time, it is waterproof and durable. It can be widely used in railways, water and sewage, civil engineering, construction, factory facilities, aquaculture and many other fields. At 1:42 on the 3rd, the monomer propylene compressor in Asia was successfully commissioned at Datang Duolun Coal Chemical Company. The propylene refrigeration compressor quotes the advanced refrigeration process technology package provided by the German Lurgi Company. It is a centrifugal compressor. It is currently the single propylene refrigeration compressor in the chemical industry in Asia with an air output of 60,000 standard cubic meters per hour. Rice, its role is to provide liquid propylene at two temperature levels of 4°C and -44°C to the MTP device and the evaporator of the low-temperature methanol washing process. This compressor is an important device of Datang Duolun Company and the “throat” of the entire chemical plant. In order to ensure a successful start-up of the propylene compressor, Duolun has made careful arrangements and deployments for the preliminary preparations. At 11:4 am on the 27th, professionals started the propylene compressor; after the conditions for flushing were met, the steam turbine began to rotate. As the main controller pressed the warm-up button, the propylene compressor began to warm up at a low speed, and the warm-up speed was 15 revolutions in 6 minutes, 195 revolutions in 76 minutes; then, after the critical speed increase of the unit, the propylene compressor starts to warm up at a high speed with a speed of 248 revolutions in 53 minutes; as the speed increases, the compressor dry gas sealing system is switched by nitrogen sealing To acrylic seal. During the speed-up process, professionals checked the operating conditions of the unit, and the process parameters and mechanical parameters were normal. After the speed is increased to 2613 revolutions, the central control is switched on site.
Qujing LLDPE-PE-135-American MDI material spot
, Appeared in countless ways. Plastic raw materials are one of the three major synthetic fibers. The plastic raw materials are amorphous polymers and have no obvious melting point; the melt viscosity is high, the fluidity is poor, the weather resistance is poor, and ultraviolet rays can change the color; the heat distortion temperature is 70-107 ℃ (about 85), and the product will be restored after annealing. It can be raised by about 10°C. It is sensitive to temperature and shear rate; plastic raw materials can still show a certain degree of toughness at -40℃, and can be used for a long time in the temperature range of -40℃ to 85℃.
Extrusion molding melt head (die) molding. Cooling and shaping, cooling and shaping, traction and cutting. The main technical parameters of extrusion molding: temperature: feeding section (solid conveying section); compression section (melting section); metering section (homogenization section). Pressure: The pressure turns the plastic into a molten state, and a uniform melt is obtained. Extrusion rate: The amount of extrusion of the die of the extruder per unit time. Extrusion head. The function of the extrusion head and the design principle function: the plastic melt moves in a straight line, the melt is uniform, dense and continuous, and the extrusion pressure is formed to obtain the required cross-sectional shape. Principles to be followed in the design of the machine head: Correctly select the structure of the machine head. Correctly design the inner surface structure of the machine head.
Qujing LLDPE-PE-135-American MDI material spot
The five largest PLASTIC producers in the world are Phillips, Toray, Ticona, Polyplastics and Japan Ink. my country’s Tianjin Institute of Synthetic Materials, Guangzhou Second Chemical Reagent Factory, Sichuan Zigong Chemical Reagent Factory, the Department of Chemical Engineering of Hebei Institute of Technology, and Guangzhou Institute of Chemical Technology have had a small number of small-scale trials, but they were unable to produce stable and continuous production. In terms of non-toxicity, it is recognized by the US FDA in terms of hygiene standards, and it also meets the requirements of the Japanese Ministry of Health and Welfare Announcements No. 434 and No. 178.
ExxonMobil Chemical’s metallocene polyethylene technology can be used to produce thinner and lighter heavy-duty packaging bags, while still being the same strong and durable. This is good news for packaging manufacturers, heavy-duty packaging bag manufacturers and other manufacturers. Through thinning, you can save 15% of raw material costs and obtain lighter packaging bags. (Don’t forget that through weight reduction, additional cost reductions can be obtained in the storage and transportation links). This breakthrough 125-micron thick heavy-duty packaging bag film was developed by ExxonMobil Chemical. Up to now, the film thickness of heavy packaging bags in the packaging industry in the Asia-Pacific region is usually +/-14 microns.
With the steady rise of raw materials and the demand for better technical solutions, attention to the use of high-performance structural thermoplastics is continuing to grow. Injectable high-performance compounds with outstanding mechanical properties have been introduced. In fact, the material has obvious advantages in terms of production technology and the protection of the environment and worker health. In order to stay at the forefront of the market, L:TI has introduced a new level of products in its special materials, which can be regarded as the true reference standard for most structural plastic applications. In response to engineering needs, L:TI provides special engineering materials that can meet the load in terms of tensile strength and elastic modulus.
