PA6 Nylon 6: Melting Temperature, Processing Methods

Date:2022-5-30 Author:hcscrew

pa6 screw barrel nylon 6 melting temperature

Polyamide 6 (nylon 6) melting temperature and features

The main component of nylon 6 is caprolactam, which contains six carbon atoms. Because nylon 6 is made up of parallel chains with hydrogen bonds between them, it’s less closed and has fewer hydrogen bonds inside.

Nylon 6 density 1.12-1.14 g/cm³

The glass transition temperature 47 ℃

Max/Min continuous service temperature 80-120 ℃/-40 to-20 ℃

Nylon 6 Melting temperature 210-220 ℃

PA6 processing methods

Before processing, dry the product at temperatures ranging from 80 to 110 °C until the moisture level is less than 0.2 %. When PA6 decomposes, it mostly makes carbon monoxide, ammonia, and caprolactam.

Injection Moulding: It is recommended that the screw L/D ratio be 18 to 22. PA6 melt temperature: 240 to 270 °C. Mould temperature: 55 to 80 °C

Extrusion: Extrusion can only treat very viscous grades. It is advisable to use a three-section screw with an L/D ratio of 20 to 30. The processing temperature is 240 to 270 °C.

PA6 vs PA66

The nylon 6 material is tough and abrasion-resistant. In comparison to PA66, PA6 has better processability, stronger hydrolytic stability, better surface appearance, creep resistance, a lower HDT, and similar stiffness below 180°C. It’s also less crystalline, so it shrinks less when moulded.

Compared to nylon 66, nylon 6 has a lower modulus and absorbs moisture faster. A liquid-filled material also increases elongation and toughness, as well as reducing strength and stiffness. Liquid, however, can mess with tolerances.

PA6 Strengths

It’s self-lubricating, strong at high temperatures, impact-resistant even at low temperatures, has good flow so it’s easy to process, is wear and abrasion-resistant, has excellent fuel and oil resistance, and is electrically insulating.

PA6 limitations

This results in UV stabilisation being necessary, as well as high shrinkage of the mold, and low dimensional stability as a result of high water absorption. Furthermore, mold is affected by acids, bases, and oxidizing agents. It’s best to pre-dry the material. Extremely sensitive to notch

PA6 applications

Mostly used in textiles, rope, thread, nets, and garments; toothbrush bristles; medical sutures; and classical musical instrument strings; automotive industry to make under-the-hood parts, power tool housings, packaging films (mono and multilayer), cable ties, zips, nuts, bolts, pumps, and lab equipment.

Summary

Understanding the melting point of PA6 Nylon 6 plastic helps us design and optimize the screw barrel structure of a PA extruder, and helps to choose a quality screw barrel.

About us: HUACHEN Screw barrel Factory

HUACHEN Screw has been a leading manufacturer of PA extrusion screw barrels in Zhoushan Jintang since 1993. As one of the leading companies in designing and processing plastic filament and yarn machinery replacement parts, HUACHEN Screw can provide its customers with a wide range of services, including drawing rebuilding, design, modification, and customized screw barrels. Our company has also successfully exported and supplied screw barrels to customers worldwide. >>Learn more about our company

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