First, the characteristics of PVC:
PVC scientific name for polyvinyl chloride, natural color for a slight yellow translucent, shiny. Transparency is better than polyethylene, polypropylene, poor in polystyrene, with different dosage of additives, divided into soft and hard polyvinyl chloride, soft products soft and tough, feel sticky, hard products hardness higher than low density polyethylene, and lower than polypropylene, in the flexion will appear whitening phenomenon. PVC material has non-flammability, high strength, weather resistance and excellent geometric stability.
Two, the identification of PVC:
The combustion characteristics of polyvinyl chloride are, refractory, out of the fire is extinguished, the flame is yellow, white smoke, burning when the plastic becomes soft and gives out the irritating taste of chlorine; Under UV light, hard PVC produces light blue or purple-white fluorescence, while soft PVC emits blue or blue-white fluorescence.
Three, the type of PVC:
This paper discusses soft and semi-soft PVC material, this kind of PVC can be divided into PVC film, PVC coating, PVC transparent sheet, PVC spinneret roll and some opaque PVC sheet.
A), PVC film is mainly used for inflatable, water injection (liquid) products and packaging bags, such as inflatable toys, waterbed, medical bags, bags, card sets, soft film ceiling, swimming ring and so on;
B) PVC coating materials are generally used for PVC tent, membrane structure, pulling membrane, landscape film, PVC rolling shutter door, soft water sac, soft oil tank, tarpaulin, hot water bag, etc.;
C) PVC transparent sheet is mainly used for product packaging, PVC folding box and blister shell (vacuum cover) and other blister products are common;
D) PVC spinneret rolls are often used for door MATS and carpets, waterproof MATS, car floor MATS, elevator MATS, etc.;
E), some opaque sheet uses are more diverse, more common are reflective stickers, electric car pedal pads, PVC leather and so on, and even more for industrial belts, running belts;
F), PVC plastic hard plate and plate: PVC with stabilizer, lubricant and filler, after mixing, with extruder can be extruded hard pipe, special-shaped pipe, bellows of various caliber, used as downpipe, drinking pipe, wire sleeve or stair handrail. Overlapping hot pressing of the calendered sheet can make hard sheets of various thicknesses. The plate can be cut into the desired shape, and then the use of PVC electrode with hot air welding into a variety of chemical corrosion resistant storage tanks, air ducts and containers;
PVC materials are widely used and cannot be listed one by one. The above content is for reference only.
Four, PVC PVC plastic fusion method:
The high frequency plastic welding machine (high frequency machine) is mainly used to realize the welding, sealing and embossing process of PVC.
High frequency, belongs to high frequency plastic welding equipment, it is mainly a high frequency medium heating equipment; Mainly made by electron tube high frequency electromagnetic field energy, when we put the polyvinyl chloride (PVC) as the main all kinds of plastic plastic into high Zhou Boji between top and bottom electrode, in high Zhou Boji issued under the action of high frequency electromagnetic field energy, plastic plastic internal material molecules will produce fast polarization, material molecular arrangement in the direction of high frequency electric field quickly, With the production of high frequency heat, at the same time, under the pressure of the mold, plastic and plastic processing parts are rapidly fused together; The whole process is short and fast, and the thermal bonding effect is good without harming the surface of the plastic and plastic workpiece. After the welding of the plastic and plastic workpiece by the high cycle machine, the firmness of the plastic and plastic workpiece is the same as that of the plastic and plastic material itself. It is the most perfect first choice equipment for plastic and plastic hot joint welding.