The production process of military grade heat shrinkable marking sleeve is the cornerstone to ensure its high performance and reliability. Each link has strict standards and requirements. Many key points work together to produce high-quality products that meet military standards. Starting from the selection of raw materials, the foundation of the sleeve performance is determined, and the subsequent production process requires fine control.
Strict screening of raw materials is the primary key to the production of military grade heat shrinkable marking sleeve. It is necessary to use polymer materials with excellent physical and chemical properties, such as fluororubber, polyolefin, etc. These materials must have good high temperature resistance, low temperature resistance, chemical corrosion resistance, and aging resistance to ensure that the sleeve can still function stably in extreme environments. Moreover, the purity of the raw materials must meet high standards. The presence of impurities may affect the insulation and heat shrinkage properties of the sleeve. Therefore, the qualification review and batch inspection of the raw material supplier must be meticulous.
Formula design is also crucial in the production process. Different usage scenarios and performance requirements require different formulas for polymer materials. For example, to enhance the flame retardant properties of the sleeve, specific flame retardants need to be added; to improve wear resistance, suitable wear-resistant fillers need to be added. The proportion of the formula must be determined through a large number of experiments and tests. Any slight deviation may cause the final product performance to fail to meet the standard, affecting the safety and stability of military equipment.
The key step in converting the material into the shape of the sleeve. In this process, parameters such as temperature, pressure and extrusion speed need to be precisely controlled. If the temperature is too high, the material may decompose and carbonize, affecting the performance of the sleeve; if the temperature is too low, the material will not be plasticized well, resulting in an uneven surface and poor dimensional accuracy of the sleeve. The control of pressure and extrusion speed will also affect the uniformity of the wall thickness and dimensional stability of the sleeve. Only by accurately controlling these parameters can a semi-finished sleeve that meets military standards be produced.
The marking printing link gives the heat shrinkable marking sleeve an identification function, and its process requirements are equally strict. The marking of military-grade sleeves must have high clarity, high wear resistance and corrosion resistance. Special inks and printing processes such as thermal transfer and laser engraving are used. Thermal transfer requires precise control of transfer temperature and time to ensure that the mark is clear and firmly attached; laser engraving requires precise control of laser power and scanning speed to avoid excessive damage to the surface of the casing, while ensuring that the mark depth and clarity meet the requirements, so that the mark can still remain clearly visible after the casing is heat-shrunk.
Irradiation cross-linking and expansion shaping are the core processes to improve the performance of the casing. Irradiation cross-linking uses high-energy rays to cross-link the molecular chains of polymer materials, thereby improving the physical and chemical properties of the casing, such as improving strength, temperature resistance and aging resistance. Expansion shaping is to expand the cross-linked casing to a specific size to make it have heat shrinkage function. In this process, the control of parameters such as irradiation dose, expansion temperature and expansion ratio is very critical. Any carelessness will affect the heat shrinkage ratio and contraction force of the casing, and then affect its protection and marking effect in actual use.
The final quality inspection link is an important barrier to ensure product qualification. Military grade heat shrinkable marking sleeve needs to go through a number of rigorous performance tests, such as heat shrink performance test, to check whether its heat shrink temperature range and heat shrink ratio meet the standards; electrical performance test, to check the insulation resistance, dielectric strength and other indicators; environmental adaptability test, to simulate high temperature, low temperature, damp heat, salt spray and other extreme environments, to test the performance stability of the sleeve. Only when each test meets the standards can the product be judged as qualified and put into use in the military field.
