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What is the supply of polyurethane in Hubei

Release time: 2020-02-08 04:51:13

Polyurethane sealants are widely used in civil construction, transportation and other industries:

Construction requirements of polyurethane screens: 1. The surface should be flat, clean, free of sand and loose. 2. Before construction, the base surface should be checked and accepted to ensure that it meets the requirements. Firstly, a layer of primer must be applied. The primer must be uniform. 3. After the primer is cured, a second brushing should be performed. The brushing direction must be perpendicular to the previous one to prevent scratches. Apply three or five times in sequence. 4. After the completion, before the waterproof layer is not cured, no one can be hired or the next process can be performed to avoid damaging the waterproof layer.

Generally, the method of sticking polyurethane insulation board should adopt the strip sticking method or the point sticking method. It should also be noted that the area to be glued must not be less than 50%. After the board is finished with the adhesive, the lower end of the insulation board and the base layer should be pasted together. The rock wool board should be laid horizontally from top to bottom, and should be fixed along the side. The board seams should be naturally tight. The gap between them must not be larger than 2 mm. For example, if the width of the seam is 2 mm, then a heat-insulating material is required to fill it. The surfaces of adjacent plates should be flush, and the height difference between the plates cannot exceed 1.5 mm.

Polyurethane delayed catalyst is a new type of catalyst developed in the early 1960s and used for production in the 1970s. In the production process of polyurethane products, the catalytic activity is low in the early stage of reaction and increased in the later stage, that is, it effectively delays the milky period and gel time of the reaction mixture, improves the fluidity of the reaction material, but does not extend the curing time of the product And demolding time.

The use of high-pressure foaming machines in polyurethane equipment includes applications: rigid foams such as thermal insulation building materials, cold storage sandwich panels, and refrigerator sandwiches. Its unique point is that the polyurethane high-pressure foaming machine has a large injection flow and long range, and is widely used in the insulation industry; the polyurethane high-pressure foaming machine host computer display panel, the gun head is equipped with remote mobile phone control, reflecting the humanized design.

Polyurethane insulation materials are diverse, and their applicable temperatures are different. Some products are suitable for 50 ° C, some insulation materials can be adapted to 140 ° C, and more. So how do you choose products? I list them below. There are 5 points for our reference. Matters needing attention for polyurethane board material selection: 1. First of all, we must be clear, so we should check whether the material meets the temperature of the environment in which our products are used when selecting thermal insulation materials. 2. The corrosion resistance and water resistance of the material must also be considered, so we must pay attention to the chemical properties of the insulation material. 3. The thickness of the heat insulation layer of the product is also an aspect that we need to consider. There are relevant regulations or requirements for the thickness of the heat insulation. Thin thickness is required, and good insulation performance is required, so we use products with high thickness. 4. The physical characteristics and environmental protection performance of materials are also important considerations. Compared with current requirements for energy conservation and environmental protection, they are gradually increasing. 5. The last point is the price of the product, which can be selected in combination with our engineering budget cost.

There are several important steps in the management of TDI products: issuing MSDS, correct labeling, emergency response capabilities, pre-supply and marketing audits, audit methods and qualifications, and compliance with regulations.

Polyether is a useful antistatic agent, and L44 provides long-lasting static protection to synthetic fibers.

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