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Bellows material and selection

Plastic corrugated pipe mainly has these three materials: PE (polyethylene), PP (polypropylene) and PA (nylon), which can meet the high temperature requirement of 150 ° C, there are two materials: PP and PA. The following mainly introduces these The material difference and application selection of the two high temperature resistant bellows.

High temperature resistant nylon bellows

The main material of nylon bellows is PA6, also called nylon 6, which is a high molecular polymer with high crystallinity and obvious melting point; high surface hardness, wear resistance, small friction coefficient, self-lubrication and noise reduction ; Non-toxic, odorless, non-mildew, self-extinguishing, good weather resistance, but poor dyeing. PA bellows can withstand a high temperature of 175°C for a short time, and its high temperature resistance is better than that of PE bellows and PP bellows.

EVA material and heat shrink tube

EVA material is a common name we define, it is ethylene-vinyl acetate copolymer. Compared with polyethylene, EVA is widely used in heat shrinkable tubes due to the introduction of vinyl acetate monomer in the molecular chain, which reduces high crystallinity, improves flexibility, impact resistance, filler compatibility and heat sealing , functional shed film, packaging film, hot melt adhesive, wire and cable and toys and other fields.

New energy vehicle heat shrinkable tube

New energy vehicles refer to the use of unconventional vehicle fuels as power sources (or the use of conventional vehicle fuels, but the use of new vehicle power devices), the integration of advanced technologies in vehicle power control and drive, and the formation of advanced technical principles, Cars with new technology and new structure. New energy vehicles include: hybrid electric vehicles (HEV), pure electric vehicles (BEV), fuel cell vehicles (FCEV), hydrogen engine vehicles, gas vehicles, alcohol ether vehicles, etc.

Transparent heat shrinkable tube is an important equipment for cable connection and ground sealing in various industries

Transparent heat shrinkable tube is an important equipment for cable connection and grounding sealing in various industries, especially for some cable connection devices with high sealing performance. The structure, raw materials, materials and performance directly affect power loss and cable connection. At present, the cable connection mainly has the traditional post-welding protection process. The traditional welding plus protection method can ensure the welding effect, but it is time-consuming and labor-intensive, and factors such as poor sealing effect will directly affect the use of cables and energy loss. In order to overcome the poor sealing performance and welding problems of the existing transparent heat shrinkable tubes, technicians developed a simple structure, good sealing effect, good shielding effect, long service life, safe

Steps for using shrink sleeves

1. Select the corresponding mold shrink sleeve model and specification according to the requirements and check the appearance of the mold shrink sleeve and the size of the ports at both ends. There should be no gaps, and the surface should be smooth and free of defects. 2. Determine the part that needs to use the molded sleeve, and polish and clean the corresponding used part. If you use the molded sleeve without pre-coated glue, you need to wrap 2-3 layers of hot-melt tape on the used part. 3. Put a mold shrink sleeve on the use part, use a heat gun to heat and shrink from the large port of the mold sleeve, fix it, and then slowly heat and shrink to the small port in a 360° spiral until the small port is completely shrunk. The hot melt adhesive on the inner layer melts and shows overflow. 4. Wait for the shrunk molded sleeve to cool down to normal temperature before moving it. If you want to move the shrunk cable quickly, you can use a damp cloth to cool it until it reaches normal temperature. 5. Check the quality after shrinkage. The two ends of the shrink sleeve should be completely tightly wrapped around the use position, and hot melt glue overflows at both ends, and there will be no gaps, bubbles, no cracks on the surface, and aging.

How to control the size of heat shrink tubing

In the production process of heat shrink tubing, expansion is the most difficult process to control. What method is used for its quality control?

How to choose PE heat shrinkable sleeve and PVC heat shrinkable sleeve?

Heat-shrinkable sleeves are divided into PVC heat-shrinkable sleeves, PE heat-shrinkable sleeves, PTFE heat-shrinkable sleeves, PVDF heat-shrinkable sleeves, EPDM heat-shrinkable sleeves, etc., among which PE heat-shrinkable sleeves and PVC heat-shrinkable sleeves The indicators of the casing are close. Today we will analyze which is better, PE heat shrinkable casing or PVC heat shrinkable casing.