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QICHEN's plant is located in Zhanhua District, Binzhou City, Shandong Province which is a large province of the chemical industry chain. This city comes with rich industrial support, such as advanced technical resources, abundant material supply, huge production and storage capacity, all of which are leading in China.

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Why Choose Us

Qichen meet the needs of you with best cost-effective products ,convenient and feasible solutions.

Powerful Support

15,000㎡ for Binzhou plant. 30,000 tons annual output and 1,500m³ storage capacity. More than 6 branches and storage places in other cities of China.

Special Plant Location

Come with rich chemical industrial support chain. Technical resources, material supply, production& storage capacity, all of which are leading in China.

Strong Team with Solutions

More than 20 years chemical experiences for most management team members.Could provide integrated solutions & services for our end users.

2012

The company was founded in 2014

180

More than 180 solutions

30

More than 30 product categories

100

More than 100 Cooperative partners

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Causes and solutions of slow curing of polyurethane rigid foam

Causes and solutions of slow curing of polyurethane rigid foam

Slow curing of polyurethane foam (gel reaction lag) is usually caused by imbalance in raw material formulation, improper process conditions or external environmental interference, which needs to be analyzed from the perspective of chemical reaction kinetics and thermodynamics. The following are the specific reasons and corresponding solutions:

Production Process of Polyurethane Rigid Foam for Refrigerators (two)

Production Process of Polyurethane Rigid Foam for Refrigerators (two)

Precisely control the proportion of various raw materials according to different refrigerator models and thermal insulation requirements to ensure the optimal performance of the polyurethane rigid foam. Generally, the optimal formula is determined through experiments and experience. For example, the molar ratio of polyol to isocyanate is usually between 1:1 and 1:1.5, the amount of blowing agent is generally about 10%-20% of the polyol amount, and the amount of catalyst is adjusted according to the reaction rate and foam performance requirements.

Production Process of Polyurethane Rigid Foam for Refrigerators (one)

Production Process of Polyurethane Rigid Foam for Refrigerators (one)

The polyurethane rigid foam refrigerator process mainly refers to the use of polyurethane rigid foam as a filling material during refrigerator manufacturing to enhance the refrigerator's thermal insulation performance and energy-saving effect. Here is a detailed introduction: