PIR cold bulb is a new type of cryogenic insulation materials to meet a variety of channels and devices within a range of -196 ℃ ~ + 150 ℃, and the demand for building insulation, molding of various thicknesses to meet more complex formula layer structural design requirements. It's a very excellent thermal conductivity, it is the first of all cold material, compression resistance, low thermal conductivity, excellent dimensional stability performance, the first of all cold material. Advantages: First, deep processing die CNC lathe, shaping norms, the gap is minimized; molded outer shell and tube forms a natural self-skinning, the tube shell is more durable, and can effectively play the role of waterproof. Can well avoid the cut type of insulation (cold) material structure is soft, strong permeability and other defects. Second, the molding can be made into any shape, convenient snap button overlap at both ends, plug and play, effectively solve the ring through a straight seam, it will be better to prevent air convection; third, PIR is currently LNG One of the best material cold effect, low thermal conductivity.