Polyacrylonitrile fiber procurement: A three-step process from product confirmation to acceptance! 

Polyacrylonitrile fibers (also known as acrylic fibers) are widely used in outdoor rope nets, safety nets, concrete reinforcement, geotextiles, etc. due to their resistance to sunlight, weathering, acid and alkali, and good loftiness. When dealing with products of different specifications and functions, how to efficiently complete the selection and procurement? Below, we will outline several key steps. 

Step 1: Clarify the purpose and determine the performance focus 

The performance requirements of polyacrylonitrile fibers vary depending on the application. Before purchasing, make sure to obtain the following information, which will help the supplier recommend the appropriate specifications. 

For cement/mortar reinforcement (crack-resistant fibers): For these applications, high requirements are placed on the dispersion and alkali resistance of the fibers. The fibers need to be uniformly dispersed during the mixing process, not clump together, and maintain strength in the alkaline environment of the cement. It is recommended to select surface-treated polyacrylonitrile fibers and inform the supplier of your mortar ratio and mixing method. Shandong Huimin Tai Li Fiber Products Co., Ltd. is located in "China's Rope Net Capital", mainly dealing in polypropylene fibers, polyacrylonitrile fibers, polypropylene net-like fibers, etc., and has rich product experience in the field of engineering fibers. 

For outdoor rope nets and safety nets: In such scenarios, the durability against light aging and the retention rate of strength of the fibers are of greater importance. Polyacrylonitrile fibers have better resistance to sunlight than polypropylene, but there are still differences between different batches. When purchasing, you can ask the supplier if they have added UV stabilizers and request the recent light fastness test data as a reference. 

For geotextiles and filtration materials: These applications place greater emphasis on the chemical corrosion resistance and uniformity of fineness of the fibers. Polyacrylonitrile fibers have good tolerance to acids and alkalis and are suitable for use in corrosive environments. 

Step 2: Assess the quality and batch stability 

The batch consistency of fibers directly affects the performance stability and production efficiency of downstream products. 

Attention to dispersion: For polyacrylonitrile fibers used in concrete or mortar, poor dispersion can lead to local agglomeration, which will affect the reinforcing effect. Before purchasing, it is recommended to request samples. Conduct dispersion tests in a small mixer according to your ratio to observe whether the fibers are evenly dispersed and whether there is any agglomeration. 

Testing of strength and elongation: The breaking strength and elongation of each batch of fibers should be within a reasonable range. During the procurement process, you can request the supplier to provide the test reports of recent batches and pay attention to the coefficient of variation (CV value) of strength - the smaller the value, the better the uniformity within the batch. 

Confirm the length specifications: Polyacrylonitrile fibers usually come in various lengths such as 3mm, 6mm, 12mm, 18mm, etc. The length of fibers used for concrete crack resistance is generally between 12-19mm, while for mortar it is between 3-6mm. Please select the appropriate length based on your aggregate size and mixing equipment. There is no need to blindly pursue longer or shorter lengths. 

Summary and Selection Suggestions 

When purchasing polyacrylonitrile fibers, it is recommended to communicate in the following order: 

Designated purpose: Is it for cement/mortar reinforcement, outdoor rope netting, geotextile or filtration material? Different scenarios place different emphases on strength, dispersion, light resistance, and alkali resistance. 

Clarify the specifications further: length, fineness (denier), and whether surface treatment is required (such as anti-static, hydrophilic). 

Final sample test: Conduct a small-scale trial on your mixing or weaving equipment to verify the uniformity of dispersion, strength, and processing smoothness. 

Shandong Huimin Taili Chemical Fiber Products Co., Ltd. is located in "the hometown of rope nets in China". Its main products include polypropylene high-strength yarn, polypropylene colored yarn, polypropylene fiber, polyester fiber, polyacrylonitrile fiber, polypropylene mesh fiber, safety ropes, safety nets, etc. Please feel free to send samples for testing and communicate about specific application scenarios.