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Polyurethane rigid foam is mostly closed-cell structure, with excellent characteristics of good thermal insulation effect, light weight, high specific strength and convenient construction. It also  has the features of sound insulation, shockproof, electrical insulation, heat resistance, cold resistance, solvent resistance, etc., and is widely used in insulation system for building exterior walls.

DETDA ,chemical full name as Diethyltoluene diamine , is a steric aromatic diamines. It was first produced by Albemarle Company in the United States, and the brand is Ethacure 100 . DETDA 80 is the brand name of Lonza in Europe . Now China become the third largest manufacturer of DETDA .   

we will share some common problems and solutions in the (Flat bubble assembly line):

Polyurethane flexible foam refers to a type of flexible polyurethane foam with a certain elasticity, and it is one of the largest polyurethane products. The main products include high resilience foam (HRF), splimp sponge, slow resilience foam, integral skin foam (ISF), and semi-rigid energy-absorbing foam.

Polyurethane integral skin foam, also known as whole skin molded foam, referred to as ISF. Highly active polyether polyol is main raw material. It has a high-strength outer skin, so the total physical and mechanical properties of its products greatly exceed the properties of ordinary polyurethane foams of the same density. On the contrary, under the premise of requiring the same physical properties, only lower density integral skin products are required. In this way, under the premise of quality assurance, the goal of saving consumption and reducing the cost of products can be achieved.

Polyurethane (PU) is an important synthetic material with a wide range of properties. Its products range is wide and versatile.Therefore, the question of whether polyurethane materials are toxic has attracted more and more attention. In fact, qualified polyurethane solid materials are non-toxic, but polyurethane raw material is toxic. Polyurethane has two major raw materials, isocyanate (including TDI, MDI, PIDI, HDI, etc.) and polyether polyol, of which isocyanate is relatively toxic, especially TDI is recognized as toxic, carcinogenic and irritating. Other excipients: catalysts, surfactants and blowing agents are non-toxic and harmless. In recent years, the formulation and process technology of replacing TDI with MDI has received increasing attention and made great progress. The range of applications of MDI is constantly expanding, even in the field of soft foam in the unified TDI. In addition to the process and performance aspects, the environmental aspects are a strong driving force. MDI is known to be much less volatile and relatively less toxic than TDI. When purchasing and using such products, we must pay attention to the stability of products, choose to produce in strict accordance with national standards, and strictly manage, inspect and test related products.

Polyurethane foam (PUF) integrates the sound absorption mechanism of general porous materials and the damping sound absorption mechanism of flexible materials, and has good sound absorption and sound insulation performance, and it is increasingly valued by the atmosphere as a sound absorption and noise reduction material.

If have any problem on foaming, Qichen Chemical could give help for free. The foam is soft, The foam is crispy, and the bubble cells generally relatively thick at this time, The foam falling off., The foam surface bulging.......

One 20GP' of Methylene Chloride (MC for short) ( Cas No. 75-09-2)  was shipped to Africa today.