Hanzhong plastic water tank manufacturer
For chemical drums, it is very important to master the temperature. Because temperature has a significant impact on the function of plastic extrusion and parison, improving the extruder temperature can reduce the viscosity of the melt, improve the fluidity of the melt, and improve the screw speed without affecting the mixing and plasticization of plastic. To achieve this goal, we can use electronic temperature controller to make the process temperature stable and save energy significantly. It must be well understood that humidity will affect the drying rate of chemical drums. When the relative humidity in the bucket is low, the pressure difference between the surface and the water vapor in the dryer is large, and the drying speed is fast. The isolation function of chemical drums from oxygen, carbon dioxide, nitrogen and organic solvents can vary by tens or even hundreds of times, and the basic characteristics of plastic containers should be grasped. Therefore, when selecting plastic containers, it is necessary to fully understand that plastic related functional chemical barrels are generally made by molding. Different molding methods often have a great impact on the function and cost of products.
Hanzhong plastic water tank manufacturer
1： Measurement of the overall height of the plastic bucket. The overall height of the plastic bucket refers to the vertical distance from the bottle mouth to the bottom of the bottle. The measurement method is to place the plastic bucket on a horizontal plane, contact one end of the vernier caliper with the extreme high point of the bottle mouth, rotate the bottle body 360 degrees, read the maximum and minimum values respectively, and compare the data with the size of the design drawing to see whether they are consistent. If the specification of the plastic bucket is 40-60ml, its height should be controlled within ± 0.5mm. 2： Measurement of the outer diameter of the plastic bucket mouth. For the measurement of this part, the method is to span the scale of the measuring tool across the center of the bottle mouth, avoid the position of the mold closing line of the bottle body, rotate the circular bottle mouth 360 degrees with the main shaft close to the thread of the mouth, measure the maximum and minimum values, and compare with the bottle design drawings. The external diameter error should be controlled within ± 0.1mm. 3： Measurement of the overall diameter of the plastic bucket. For the measurement of this part, the method is to use the measuring surface of the vernier caliper to contact the measuring position of the maximum outer diameter of the bottle body, close the vernier caliper, rotate the plastic can body 360 degrees, and read the maximum and minimum values. The error of its overall diameter should be controlled within 0. 1mm. 4： Measurement of the wall thickness of each part of the plastic barrel. For the pharmaceutical plastic barrel with a circular revolving body, cut the measuring area of the symmetrical part with a knife, so that the measuring tool can enter the detection point where each part of the bottle can be measured. Strictly measure the symmetrical part of the thickness of the plastic barrel mouth, shoulder, body, and bottle bottom, and read the maximum and minimum values, Compare with the design drawing data, and check whether the tolerance of thickness dimensions of each part of the plastic bucket is within the standard range.
Hanzhong plastic water tank manufacturer
When it comes to plastic packaging barrels, we are no strangers. Most of its materials are made of polyethylene, polypropylene and other plastics by blow molding and injection molding. They are used for the external packaging of liquid and solid objects in chemical, pesticide, medicine, food, hardware, electronics, electromechanical and other industries, and play an important role in our daily transportation. Now let's introduce the functions and characteristics of plastic packaging barrels. First of all, it has beautiful appearance, smooth inside and outside, seamless without welding, light weight, good strength, impact resistance, corrosion resistance, non-toxic and tasteless, and convenient transportation. It has a long service life and can be used for at least one and a half years under normal filling, transportation and loading and unloading conditions. Its product technical parameters are strictly in accordance with national standards, and the appearance design and size of the product can also be customized according to needs. The temperature that can be used for hot filling shall not exceed 60 ℃ generally. After hot filling, the lid and stacking shall be closed after the contents are fully cooled and cooled to room temperature. If the easily dispersed chemicals are contained, the cover with exhaust function can be used to avoid the danger of overpressure during transportation and ensure the sealing performance of the liquid.
Hanzhong plastic water tank manufacturer
When wholesaling plastic buckets, you must pay attention to the choice of plastic materials! The wholesale orientation of plastic drums can only be carried out in the viscous flow state. Both chain segment orientation and whole chain orientation are thermodynamic non-equilibrium states. When the external force is released, the chain will be in a random state again due to the thermal movement of molecules, which is called solution retrieval. Only when the chain segment or molecular chain after removal is rapidly cooled to the glass transition temperature can the removal space be retained. This "frozen" orientation is only relatively stable, and it will also be slowly de oriented. As the material temperature increases, the recovery will rapidly advance ˉ The orientation of molecular chains will be produced in the melting process of plastics, such as injection and extrusion. The effect of orientation on the product is the anisotropy of properties. The strength and modulus in the orientation direction increase significantly, and the strength and modulus perpendicular to the orientation direction decrease significantly. This is because the atoms of the molecular chain in the orientation direction are bound by chemical bonds, while the force between the molecular chains perpendicular to the orientation direction is the van der Waals force.
Hanzhong plastic water tank manufacturer
Why is the chemical barrel deformed? 1. In actual use, the chemical barrel will be deformed due to the great difference in the thickness of the barrel wall. However, the machines used to make chemical barrels in China are relatively backward, and there are fewer control points for wall thickness, which results in the asymmetry of the barrel body. Therefore, when formulating the standards for chemical barrels, they are also relatively loose. In some cases, the two relatively symmetrical wall thicknesses are about 2:1. The chemical barrel with uneven wall thickness is often judged as qualified when dissecting. 2. According to relevant people, the ambient temperature is the main factor causing the deformation of plastic chemical barrel. We should control the ambient temperature of plastic chemical barrel to prevent it from deformation. The plastic chemical barrel can carry a high heat of 108 degrees, and a low heat of 70 degrees below zero. Therefore, in general, the temperature of the liquid carried by the plastic chemical barrel should be 40 degrees below zero to 60 degrees below zero. If this value range is exceeded, when the chemical plastic bucket device weighs more or the temperature is higher, protective measures should be taken for the plastic chemical bucket to avoid deformation of the plastic chemical bucket. 3. After the chemical drum is filled with liquid goods, after the lid is tightly rotated, because it is airtight, when the liquid inside is cooled, the pressure inside the drum becomes smaller, while the external pressure is larger, forming the pressure difference between the surface and the inside of the drum, causing the deformation of the chemical drum. The inspection procedure for chemical drums clearly stipulates that they should be sealed and airtight. If the liquid inside is dangerous goods, the chemical drums for Class I dangerous goods should be able to accept a pressure of 30Kpa/cm2, and the plastic drums for Class II and III dangerous goods should also be able to accept a pressure of 20Kpa/cm2.
