Heilongjiang plastic bucket manufacturer
What are the functions of resin in plastic bucket production? In the same kind of plastics, when the filler content is high or the inorganic filler in the filler is increased, the shrinkage rate is small. The mold structure that is conducive to improving the molding pressure, increasing the plastic mold filling fluidity and making the plastic part dense can reduce the shrinkage rate of the plastic part. Any process factor that can make the plastic part dense and overflow the low molecular volatile matter before molding can reduce the shrinkage of the plastic part, such as preheating and pressurizing the phenolic plastic before molding. After heating, compacting and mixing in the barrel of the injection machine, the process of transforming loose powder or granular solid into continuous homogenized melt is called plasticization. Homogenization includes four aspects, that is, after the material is plasticized, the composition, density, viscosity and temperature distribution in the melt must be uniform. Metering refers to the preparation work that can ensure the injection machine to discharge the plasticized melt out of the barrel at a constant temperature, pressure and quantity through the plunger or screw, which needs the injection machine to control the plunger or screw during the plasticizing process.
Heilongjiang plastic bucket manufacturer
The wholesale of plastic drums with polar groups will make the materials hygroscopic. If stabilizers, plasticizers, fillers and other additives in plastics contain hydrophilic groups, polar groups, etc., they will also increase the rate of moisture absorption of materials. The rate of moisture absorption of plastics from the air is also related to the specific surface of materials. The feeding state of plastic materials is mostly granular (thermoplastic) (thermosetting plastic molding powder, some thermoplastic resin powder), with large specific surface area and fast moisture absorption rate from the air. Long term stored plastic is easy to achieve moisture absorption balance and contains more water. Before molding, it must be fully dried, otherwise there will be surface silver filaments, internal bubbles and other defects during the molding of products, and some plastics will be hydrolyzed and degraded, which will cause the hygroscopicity of plastic products under mechanical properties to affect the performance of products, Inhalation of moisture inside the products often acts as a plasticizer, which significantly reduces the wholesale of plastic barrels, changes the mechanical properties, and the plastic with obvious moisture absorption also has an impact on the size of plastic parts.
Heilongjiang plastic bucket manufacturer
First, check whether the lid and barrel body of the plastic barrel are matched products when filling, otherwise if the lid and barrel body are not matched, the liquid may leak from the mouth. Liquid temperature shall not be higher than 70 ℃. The storage should be dark, the temperature should be below 40 ℃, and the temperature should not exceed 25 ℃ when loading and transporting. Do not load and transport the plastic packaging barrel immediately after filling the high-temperature liquid. Please do not drag the chemical barrel directly on the ground during the transportation of the filled liquid to avoid abrasion and bruise at the bottom. The correct method is to lift it with both hands or use a forklift wooden pallet for shipment.
Heilongjiang plastic bucket manufacturer
When the surface of the plastic bucket is labeled, the labeling surface should be flat. A "frame" can be designed on the surface of the plastic bottle so that the label can be positioned accurately without movement. During blow molding, the first contact part of parison inflation always tends to be the first hardened part. Therefore, the wall thickness of this part is also larger. The edge and corner are the parts where parison inflation contacts, and the wall thickness of this part is small. Therefore, the edges and corners of plastic bottles should be designed as rounded corners. The rigidity and bending resistance of plastic bottles can be improved by changing the surface shape of the plastic bottle, such as making the middle of the plastic bottle relatively thin, and increasing the circumferential grooves or ribs on the surface of the plastic bottle. The longitudinal grooves or stiffeners can eliminate the deviation, sagging or deformation of plastic bottles under long-term load. The printing surface of the plastic bucket is where consumers focus their attention. The printing surface shall be flat and continuous; If the plastic bottle contains a handle, a groove, a reinforcing rib and other structures, attention should be paid not to inconvenience the printing operation during the design. The elliptical plastic bottle has high rigidity, but the manufacturing cost of the mold is high. Therefore, in order to ensure the rigidity of the plastic bottle, in addition to selecting materials with high rigidity, it is also necessary to enhance the rigidity and load resistance strength of the plastic bottle through the shape design of the plastic bottle.
Heilongjiang plastic bucket manufacturer
In addition, when the plastic bucket is exposed to light, there will be temperature changes, which can be regarded as heating. The increase of temperature will accelerate the dispersion of oxygen, and then increase its oxidation rate, which will lead to thermal bonding and cracking. In addition, touching the oxygen in the air and even ozone, over fire bonding or molecular chain cracking can accelerate aging, and there are other elements such as water, high-energy radiation The media, etc. Therefore, try not to expose to the sun when using plastic buckets daily. These are the reasons why plastic drums are easy to age summarized by the manufacturer of plastic drums. Plastic buckets can be seen almost everywhere in life. Although their price is not expensive, people should also pay attention when using them. Plastic is a kind of aging material, especially under ultraviolet radiation, its aging speed will be greatly accelerated. Therefore, plastic buckets need to be carefully stored to avoid long-term storage under high temperature, direct sunlight and other environments.
