Polyamide color masterbatch procurement: Color not up to standard, filament breakage? Let's take a look at how to pass these checks. 

Polyamide (nylon) color masterbates are used for coloring products such as nylon filaments, short fibers, and non-woven fabrics. Nylon filament production requires high temperatures and is sensitive to moisture. The heat resistance, dispersion, and carrier compatibility of color masterbates are more stringent than those of polypropylene. Below, from a production perspective, we will introduce how we control these aspects. 

I. Carrier Matching and Temperature Resistance Control 

The core of nylon color masterbatch lies in the selection of carriers, the temperature resistance of pigments, and the compatibility with the nylon substrate. 

Carrier matching: Nylon is divided into different grades such as PA6 and PA66, and their melting points and processing temperatures are different. We select the corresponding carrier resin based on your nylon substrate (for example, PA6 color masterbatch is used for PA6 spinning) to ensure good compatibility. Inconsistency between the carrier and the substrate will result in breakage during spinning, the formation of gel particles, or a reduction in fiber strength. 

Pigment selection: The spinning temperature of nylon fibers usually ranges from 260℃ to 300℃. Therefore, we need to choose pigments that are stable, do not decompose, and do not migrate within this temperature range. We will select appropriate temperature-resistant grades for different color series (especially light colors and fluorescent colors) to avoid color differences or air marks caused by pigment thermal decomposition. 

Water control: Nylon is sensitive to moisture. The color masterbatch needs to have a low water content before spinning. We reduce the occurrence of spinning breaks and bubbles caused by moisture carried in the masterbatch by either conducting drying treatment or selecting carriers with low water absorption. 

It should be noted that there are normal fluctuations in the raw materials from different batches. Before each batch of color masterbatch production, we will first make a small sample. We will then press or blow film under the simulated temperature of nylon filament spinning, and compare the color and dispersion effect with the standard sample. Once it is confirmed to be correct, we will proceed with the large-scale production. 

II. Dispersion Uniformity and Filtration Performance 

The nylon filament spinning components have a high filtration accuracy. If there are agglomerated particles or impurities in the color masterbatch, it is likely to cause clogging of the screen, an increase in pressure, or the formation of color spots. 

Nanometer-scale grinding technology: We employ a wet grinding process to finely grind the pigments to the nanometer level, and combine it with an ultradispersant coating to ensure a more uniform distribution of the pigments in the carrier. This helps to reduce the increase in filtration pressure and the formation of crystalline points during the spinning process. 

Filtering and particle size detection: During the production process, multiple layers of filter nets are installed to remove any possible agglomerated particles or impurities. A laser particle size analyzer is used to measure the particle size distribution of the pigments in the masterbatch, ensuring that the proportion of large particles is controlled within a reasonable range. 

Batch retention samples and comparison: Samples and color plates are retained for each batch of color masterbatches. During the production of the next batch, a comparison of color, dispersion effect, and filtration pressure simulation tests will be conducted with the retention samples from the previous batch to ensure the stability between batches. For masterbatches used for fine-denier yarn or high-speed spinning, we will pay extra attention to the usage period of the spinning components. 

Summary and Selection Suggestions 

When purchasing nylon color masterbatch, it is recommended to follow the steps below for confirmation: 

Specify the nylon grade and process: PA6 or PA66? The spinning temperature, speed, and filtration accuracy, so as to match the appropriate carrier and temperature resistance level. 

Provide color palettes and samples: Run the machine for proofing, observe the color accuracy, check for any color spots or crystal points, as well as the breakage rate of the spun fibers and the changes in filtration pressure. 

Confirm moisture content and batch stability: The supplier is required to provide the moisture content test data of the masterbatch and a comparison of multiple batches of color samples in the recent period. 

Jiangsu Meizilin Nano Technology Co., Ltd. adopts nano grinding technology and focuses on coloring and functional masterbatches for polyester, nylon, polypropylene, polyethylene, PLA and other substrates. It can provide nylon color masterbatch technical solutions. Welcome to request samples for testing. 

Official website: http://www.mizlion.cn 

Contact person: Mr. Ni  Mobile phone: 13805103263 

Telephone: 0515-88322183 

Email: risen@risencolor.com 

Address: No. 1, Honghua Road, Southeast Industrial Park, Yantong Town, Yancheng City, Jiangsu Province