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Design Key Points of Polyurethane Wear Liner

Views: 44 Update date: Sep 23,2019

Polyurethane Wear LinerWear-resistant lining board of grain machinery is designed according to the use environment and requirements. The earliest wear-resistant lining board used in the chute of silo is made of wear-resistant steel material. However, in use, the steel lining board is not wear-resistant and has short service life, which leads to frequent replacement of the use unit, which is very inconvenient and has a positive impact. Frequent purchases and deliveries. The hardness of steel material is very high. In the process of loading and unloading food raw materials, such as grain, the part contacted with the rigid liner will be broken in large quantities, which seriously affects the quality of grain. After selecting PE material as liner, the above problems still exist. Therefore, polyurethane wear-resistant lining came into being. As an elastomer product, polyurethane wear-resistant lining has very high wear resistance and rebound buffer performance.

 

1. Selection of raw materials:

 

Different polyols have different molecular structures and molecular weights. The performance of different polyols differs greatly. The environment and requirements for use are different, and each has its own unique characteristics and optimal application range. Polyester polyols have good wear resistance, corrosion resistance, oil resistance, high mechanical strength and aging resistance. Polyether polyols have good resilience, low temperature flexibility, hydrolysis stability and mildew resistance. There are many curing agent systems. Different formulation systems use different performance requirements. Choosing different systems depends not only on the performance requirements of products, but also on the price of products. The wear resistance and resilience of the wear-resistant liner are determined by the selected materials.

 

Wear-resistant liner is designed according to the use environment and requirements. The earliest wear-resistant liner used in the chute of silo is made and installed with PE material. But in use, PE liner is not wear-resistant and has short service life, which leads to frequent replacement by users, which is very inconvenient, and affects normal incoming and outgoing goods. The hardness of PE material is very high. In the process of loading and unloading food raw materials such as grain, the part contacted with PE lining board will be broken in large quantities, which seriously affects the quality of grain. As a result, polyurethane wear-resistant liner emerged as the times require. As an elastomer product, polyurethane wear-resistant liner has very high wear resistance and resilient cushioning performance.

 

1. Selection of raw materials:

 

Different polyols have different molecular structures and molecular weights. The performance of different polyols differs greatly. The environment and requirements for use are different, and each has its own unique characteristics and optimal application range. Polyester polyols have good wear resistance, corrosion resistance, oil resistance, high mechanical strength and aging resistance. Polyether polyols have good resilience, low temperature flexibility, hydrolysis stability and mildew resistance. There are many curing agent systems. Different formulation systems use different performance requirements. Choosing different systems depends not only on the performance requirements of products, but also on the price of products. The wear resistance and resilience of the wear-resistant plate are determined by the selected raw materials.

 

2. Flame Retardant and Antistatic

 

Flame retardant and antistatic properties are directly related to the selected additives. There are thousands of manufacturers and enterprises producing and selling various additives in China. But those additives meet our formulation requirements and are suitable for our use without affecting the intrinsic properties of polyurethane. Shanghai Pengbosheng Polyurethane Co., Ltd. has made numerous experiments, tried hundreds of different flame retardants and antistatic additives, and screened out the additives suitable for our formulation system. Choosing the appropriate amount of additives can not only bring the properties of additives into full play, achieve the design targets of flame retardant and antistatic, but also can not lose the superior properties of polyurethane.

 

3. Production process design

 

The formulation design of wear-resistant board is good, and the most important thing is how to realize batch production. Polyurethane has its own reaction characteristics. Its reaction activity is high, reaction time is short, and the corresponding operation time is very short. How to pour the product into a large sheet is the key of process design. Before the mixing reaction of polyurethane raw materials, heating temperature is also related to the reaction speed. Low temperature, high viscosity of raw materials, uneven mixing of raw materials, product quality decline; high temperature, too fast reaction speed, more difficult operation, high rejection rate directly affect product cost.

 

3. Production process design

 

The formulation design of wear-resistant lining board is good, and the most important thing is how to realize batch production. Polyurethane has its own reaction characteristics. Its reaction activity is high, reaction time is short, and the corresponding operation time is very short. How to pour the product into a large sheet is the key of process design. Before the mixing reaction of polyurethane raw materials, heating temperature is also related to the reaction speed. Low temperature, high viscosity of raw materials, uneven mixing of raw materials, product quality decline; high temperature, too fast reaction speed, more difficult operation, high rejection rate directly affect product cost.

 

The polyurethane products produced by our company are applied to various industrial accessories in different industries. They have the general characteristics of wear resistance, good elasticity, corrosion resistance and easy cleaning. They can also be customized in various shapes and sizes for polyurethane products in different environments according to the requirements of customers.

 

Polyurethane steel mesh lining board is used for slip pipe lining, funnel mouth lining, or key parts of agricultural and animal husbandry machinery manufacturing. It fully utilizes the characteristics of polyurethane, such as high wear resistance, good springback and no slagging. It also takes into account the strength requirements of products, customer construction convenience and other factors, and designs and creates different shapes and shapes required by customers.




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