Bubbles and vacuum Bubbles (Bubbles) defects, because the center of the wall thickness of the product cooling is the slowest, the surface of the product cooling rapidly, the rapidly shrinking surface will pull the material over, the uneven volume of the molding product shrinkage caused by the thickness of the part of the hole, the water or gas in the plastic bubble becomes a bubble. Bubbles can be divided into bubbles and vacuum bubbles. Generally speaking, bubbles occurring on transparent products can be directly observed, while bubbles occurring on opaque products can sometimes not be seen from the outside and can only be found by cutting them open or other means. The appearance of bubbles will make the product filled, uneven surface.
Pay attention to the service life of LED energy-saving lamps. LED energy-saving lamps, service life is long, but affected by factors such as environment, droop, LED energy-saving lamp life is affected, must know the factory when purchasing LED bulbs with LED energy-saving lighting failure and service life, good quality, light failure is small, long service life, the price will be high.
1, LED lighting life: different quality OF LED energy-saving lamps is the key to life, life is determined by LED light source decline. LED light source low light decay, long life, LED lighting lamps and lanterns high price. 2, LED chip: LED lighting lamp core part of LED light body LED chip, different LED chips, the price difference is very large. LED chips from Japan and the United States are better and more expensive, while LED chips from Taiwan and Local Chinese manufacturers are slightly cheaper. At the same time to see LED chip size, LED price is proportional to the size of LED chip, the quality of large chip LED is better than small chip. 3, LED packaging colloidal: general LED colloidal epoxy resin, plus uv resistance and fire retardant LED price is more expensive, high-quality outdoor LED lighting should be uv resistance and fire prevention.
