What are the PA66 materials with good fluidity?

There are many PA66s with good liquidity, what are you looking forward to? Otherwise, the PA66 with higher performance and good performance will of course have good fluidity, but can you accept it? What products does the landlord do?

You can send a sample to me, I will help you analyze, tailor-made to meet your requirements of PA66, cost-effective package you are satisfied.

The shrinkage and linear expansion coefficient of the finished product of PA6 are smaller than those of PA66, the breakdown voltage of PA6 is better than that of PA66, and the other properties of PA6 are not as good as PA66.

Nylon 6 is a polycaprolactam, while nylon 66 is a polyhexamethylenediamine adipate. The water absorption rate of PA66 is greater than that of PA6, and PA66 is not easy to stain. Nylon 6 has a melting point of 220C, while Nylon 66 has a melting point of 260C.

In addition: ** 66 > 6, strength 66 > 6, toughness 66 < 6, formability 66 < 6, low temperature physical properties 66 < 6. The above is a comparison of pure resins, if the modification will be quite different, the modified material of PA66 in the market will be better, and the modification of PA66 is more mature and widely used.

The viscosity is generally lower than that of PA66, so the fluidity is better than 66 and the toughness is better than 66

With a low melting point and a wide range of process temperatures, it is more resistant to impact and solubility than PA66.

Gained from the experience of Sino mold tryout.

PP has the best fluidity followed by PA6 to PA66 and PA6 to PA66, these two plastics are modified together, so there is not much difference.

Finally, try PBT plastic, which is very hard and has very poor fluidity.

Due to the excellent comprehensive properties of glass fiber reinforced nylon 66 particles, they have been widely used in many fields, but in the actual application process, the processing fluidity of glass fiber reinforced nylon 66 particles greatly restricts the application space. So what does liquidity have to do with it? Today, Hengshui Jinlun Plastic Industry mainly introduces the additives that affect the fluidity - lubricant TAF.

Lubricant TAF is a BAB-type copolymer formed by reacting with a reactive monomer containing polar groups under the action of a catalyst based on pre-formed difatty acid amide EBS. TAF not only maintains the lubricating properties of EBS, but also has a polar group structure that can be combined with some polar groups on the surface of the glass fiber, which improves the adhesion state of the glass fiber and the reinforced nylon particle resin, and thus improves its dispersion in the resin. At the same time, the lubricant TAF has lubricating properties, which can improve the processing fluidity and improve the surface finish of the material.

Experiments show that TAF has little effect on the tensile strength, elongation at break, notched impact strength of Charpy beams and notched impact strength of Charpy beams. As an internal and external lubricant, the appropriate amount of TAF can improve the mechanical properties of the reinforced nylon particles, and the excessive amount will reduce the mechanical properties of the material.

Not only that, TAF also has other effects, which will also have a certain impact on enhancing the appearance of nylon granular products. In the cavity, the resistance to the flow of the melt is different due to the uneven thickness. The flow space at the posterior interface is large, the resistance is small, and the flow rate is fast. The flow space at the thin section is small, the resistance is large, the flow rate is slow, and the glass fiber migrates to the surface due to the force of the melt during molding, resulting in the exposure of the glass fiber.

Due to this difference in rate, the melt from different wall thicknesses converge at different rates, and finally a significant weld mark is formed at the confluence. After the addition of TAF, the injection pressure has been greatly reduced, and the processing fluidity of the melt has been significantly improved. The friction between the melt and the mold is reduced, and the flow rate of the melt in the mold cavity is accelerated, so that the glass fiber exposure phenomenon is reduced.

Summary: Although lubricant is an auxiliary reagent, which mainly plays the role of lubrication, after further experiments, it is found that the addition of appropriate amount of lubricant can improve the mechanical properties to a certain extent, the fluidity can be greatly increased, and the exposure of nylon 66 particles can also be improved, so as to improve the appearance of the product.

HopefullyHengshui Golden Wheelcan help you, hope!

I have used most of the materials you said, and I personally think that PP and PA66 have the best liquidity.

The book on polymer preparation of the Chemical Industry Press should be read again. To answer your question, I feel that I have reviewed all the high-level things. I was originally preparing for the master's re-examination, but I didn't test the contents of polymer preparation.

It's a bit too much for you to ask, so let's find this information for yourself.

Whether it is easy to produce flash, mainly depends on the fluidity of the material, poor fluidity, not easy to flash, good fluidity, easy to flash.

POM and PA66 are both materials with good fluidity, and it is impossible to say which one is easier to flash just by comparing them like this. Because, the fluidity of different types of materials is not the same. In addition, the influence of the injection molding process on flash is great.

Nylon has low viscosity and good fluidity, the fluidity can be changed, the viscosity of nylon is sensitive to temperature, increase the temperature, the lower the viscosity, the lower the viscosity, reduce the temperature will increase the viscosity and make the fluidity worse, thereby reducing the generation of flash.

POM also has low viscosity and good fluidity, but the viscosity of POM is not sensitive to temperature, and increasing the material temperature will reduce the material temperature and has little effect on its viscosity, but it is sensitive to the shear rate, that is, the faster the speed, the lower the viscosity, the better the fluidity, and reducing the speed can increase the viscosity and make the fluidity worse, thereby reducing the production of flash.

So, if you ask how ABS compares to PA66, I can safely say that PA66 is easier to flash. However, compared with PA66, POM is almost the same, and it has a lot to do with the material type and process level, so there is no way to compare it directly.

It is generally an acidic catalyst, such as phosphorus trihalide. Fluidity has a lot to do with molecular weight distribution, too much molecular weight, slightly worse viscoelasticity and flow, and temperature, and cross-linking. The larger the molecular weight and the higher the temperature, the more likely it is to have side reactions and cross-links.