High Temperature Nylon Development Status

High temperature nylon development status

DuPont Zytel HTN

DuPont Zytel HTN is 51G, 52G, 53G and 54G series, among which 51G, 52G and 54G are 6T modified products, belonging to semi-aromatic nylon PPA, while 53G series is categorized by DuPont as high-performance nylon due to less benzene ring content in the molecule. The melting point is up to 310°C, the glass transition temperature is up to 140°C, and the heat deflection temperature (HDT) is up to 288°C. The HTN series is also available in a wide range of colors.

The performance characteristics vary between the four DuPont HTN series and are described below.

HTN 51 Grades, PA6T/DT, is resistant to very high temperatures, with a long-term service temperature of about 150°C and excellent chemical resistance for oil-heated molds.

HTN 52 Grades, PA6T/66, has good mechanical retention under thermal, chemical and humidity conditions, heat deflection temperature can reach over 280°C, good SMT compatibility, outstanding over reflow capability, and superior electrical properties.

HTN 53 Grades, PPA, provides better hardness and toughness at moderate temperatures (long-term temperature resistance is poor, only about 65 ℃), can be controlled by water temperature mold, but also has excellent surface properties.

HTN 54 Grades, PA6T/XT+PA6T/66, improved from 52G series, increased toughness and improved mechanical properties under wet conditions.

Swiss Far East EMS

EMS has introduced a registered trademark [Grivory" for semi-aromatic nylon resins, which are semi-crystalline resins made by polymerizing aromatic acids such as hexamethylene diamine, terephthalic acid, or isophthalic acid. These new resins are unaffected by moisture (nylon is usually hygroscopic) and have excellent high-barrier properties, making them suitable for use as multilayer packaging materials; high strength, making them metal replacement materials; high heat resistance, with stiffness and strength unaffected at 120°C, making them suitable for use in the processing of connectors for electronic components; and for the processing of a variety of parts for use under the hoods of automobiles.

The Grivory G4V grade in the Grivory series is made from a 6I/6T mixture (a mixture of terephthalic acid and isophthalic acid) mixed with 20% to 60% glass fiber, and it is a tough, high-flow material that produces products with excellent surface quality. At a mold temperature of 80°C, G4V grades with 50% fiberglass reinforcement exhibit 70% gloss compared to 30% for MXD6.

In addition, G4V has better impact strength. Applications include office equipment and automotive interior and exterior trim. Other new grades in the semi-aromatic nylon series include a UV-stabilized grade and a flame-retardant grade, the latter with polyphenylene dicarboxamide (PPA), which is available in Zytel HTN from DuPont or Amodel from Sonyville.

Grivory XE3876 grade nylon is a 30% glass fiber reinforced 6T/66 copolymer that is halogen and red phosphorus free. It can be used in lead-free soldering applications.

Grivory GV-5HL grade is a UV-resistant grade manufactured from a 50% glass fiber reinforced 6I/6T copolymer, which offers the benefits of weatherability and outdoor gloss retention. Applications for this grade include housings for communications equipment and products such as lawn and garden fences and benches.

Mitsui, Japan

ARLEN is a high-temperature resistant nylon developed by Mitsui Chemical Corporation in Japan. ARLEN A series products are composed of PA6T/6I and C series products are composed of PA6T/66.

ARLEN's main characteristics are excellent high-temperature rigidity, dimensional stability and chemical resistance, but also has the nature of thermoplastic plastic, easy molding in the injection, not easy to burr, but also makes it a high value-added super engineering plastics, and can be added to carbon fibers, glass fibers, and change the color to meet the needs of customers, the Tm up to 310 ° C; Tg 85 ~ 125 ° C. The excellent characteristics make it widely used in a wide range of applications.

Excellent characteristics make it widely used in motor/electronic parts (SMT process), various parts under the hood of the car. ARLEN used in electronic connectors by the customer's affirmation of its low water absorption, compared to PA46, ARLEN's water absorption rate is low, in the SMT, ARLEN has a high resistance to soldering temperature; in addition to electronic connectors for electronic connectors usually inserted into the terminals, the mechanical strength and toughness are more important. Strength and toughness are more important, compared to PA9T, ARLEN toughness is better than 9T, PA9T is easier to crack.

Germany BASF

BASF Ultramid T series products are polyamide molding compounds based on Pa6/6T. They have excellent mechanical and electrical properties and low water absorption.

Due to their favorable properties, these materials have become indispensable for a wide range of components and machine parts in almost all fields of engineering (e.g. as high-quality electrical insulating materials) as well as for many special applications. A semi-aromatic, high-temperature resistant polyamide, Ultramid T KR4357 G6, is now being used in new applications.

A Raymond, an international supplier of curing systems for the automotive industry headquartered in France, is currently using specialty chemicals (PA6/6T) from BASF for quick connectors in fuel lines. Almost any car or truck manufacturer in Europe is using these quick connectors. These components, weighing only 15 g, are resistant to fuel and zinc chloride at high temperatures (130°C).

Ultramid T KR's particular advantage in this application is not only its low creep, but also its excellent stiffness and toughness, which means it can even withstand the impact of flying stones. These properties make it clearly superior to polyamide 66 and have the potential to replace polyamide 12.

In addition, BASF launched halogen-free high-temperature-resistant nylon Ultramid T KR4365 G5 products using red phosphorus for fire protection, mainly for the requirements of good mechanical properties and high resistance to electrical start trace, and accept the inherent red color of the plastic or tend to choose the application of the black color, especially suitable for welding in the environment of higher temperatures.

Solvay, USA

Amodel PPA (poly(terephthaloyl-p-phenylenediamine)), commercialized in 1991 by Solvay USA, is a high temperature nylon with excellent mechanical properties, with a heat deflection temperature of 280°C and a continuous use temperature of up to 170°C, which meets the required short-term and long-term thermal properties.

It maintains its superior mechanical strength, stiffness, fatigue resistance, and creep resistance over a wide temperature range and in high humidity environments, while possessing excellent chemical resistance and low water absorption. Special grades such as low-temperature impact resistant, flame retardant, glycol resistant, paintable and platable are available. It can be used in automobiles, kitchenware, home appliances, all kinds of thin-walled electronic and electrical components, etc. Its excellent performance of high temperature resistance and ethylene glycol resistance is especially suitable for thermostat shell.

It is worth mentioning that Solvay launched AMDEL, halogen-free flame retardant specifications FR-4133 market reflected better.

Evonik VESTAMID® HTplus

VESTAMID® HTplus, a new member of Evonik's VESTAMID family of materials, has been specially developed as an alternative to metal in conventional metal products. VESTAMID HTplus is a polyphthalamide (PPA)-based semi-crystalline material, which is particularly suitable for high-temperature use and offers a good price/performance ratio.

China's high-temperature nylon development status

Domestic part of the research of high-temperature resistant nylon in the laboratory is almost synchronous with the world, due to a variety of objective reasons has not been able to achieve industrialization. In recent years, the rapid development of the market catalyzed many enterprises to focus on this field.

At present, the domestic production of high-temperature nylon enterprises are fewer and the product is relatively single, mainly to PA6T and PA10T. Domestic high temperature resistant nylon enterprises have the following enterprises. Jinfa Science and Technology PA10T and its alloys, Daoyuan Group PPA, etc., Jiezhijie PA6T, Pratt PPA, etc., Xinhecheng PPA, etc., Hualixing, Plastic PA12, PA9T, etc., Shenzhen Tai plastic PA46, PA6T, PA9T, etc., Xinli Xinmai PPA, etc., Shenzhen Woerth PPA, etc., Yipuwan PA46, PPA, etc., Dezongtai PA6T and its alloys, PA12T, Kawasaki PA6T, PA9T, PA46, PPA, PA8T, etc., Gerry PPA, PA46, PA9T, PA6T, etc., polycylinder PA6T, Longdao PPA, PA46, etc., Baifu PPA, PA9T, PA12, etc., Shenzhen Gaoke PPA, etc., Dongguan Meibang PPA, PA9T, PA6T, etc., Polywell PPA, etc., CGNJ PPA, etc. Nuclear Juner PPA, etc.

Overall, the domestic production capacity of high-temperature resistant nylon products are still relatively few enterprises, and product categories are relatively single, product quality stability is poor, the core technology is still mainly in the hands of foreign chemical giants.

Under the background of the gradual promotion of domestic substitution, it is believed that the enterprises related to high-temperature resistant nylon will usher in new opportunities and challenges.

Development trend of high temperature nylon

Market demand can promote the development of an industry, there is a demand for the production of power, thus promoting the progress of the industry. With the rising demand of high temperature nylon market in China, the dosage increases year by year, and it is expected that China's demand for high temperature nylon will grow at a rate of 15% to 25% in the next few years.

Moreover, China's nylon market is very broad and has considerable development prospects in the future, but the market share of domestic products is not very high, mainly due to technical barriers and brand establishment. As a local enterprise, we should devote ourselves to developing new performance of our products as well as other fields in the future development.