How Does nylon 66 yarn Work?

Introduction to Nylons 6 and 66

Nylon 6 and Nylon 66 are both commonly used synthetic polymers known as polyamides.

Check now

The numbers represent the amount and variant of the carbon atoms in the chemical structure from which they are formed.

For example:

Nylon 6 is created from caprolactam, which consists of 6 carbon atoms, while nylon 66 is produced from adipic acid, which has 6, and hexamethylene diamine, which also has 6.

Most nylons, including 6 and 66 are semi-crystalline and possess good strength and durability and are ideal for demanding projects.

History of Nylon 6 and 66

Nylon 66 was discovered at the Du Pont Company in the s, giving the world the first synthetic fibre.

This was quickly introduced into the commercial arena and became the backbone of the new synthetic fibre industry.

Following this in , nylon 6 as it was to be known, was created in Germany by Paul Schlack.

Both fibres have become highly important in today&#;s fibre trade, and their uses and applications continue to be discovered and improved.

Technical comparisons of Nylon 6 and 66

• The number of units within the polymer chains of nylon 6 and 66 is 130 and 65 respectively.
• Both iterations comprise weak basic amino acids and acidic carboxylic acid end groups.
• They are both strong fibres of moderate elasticity, even after being drawn.
• Both nylons have high tenacity variants that are applied to industrial applications, and both have multiple strands of property definitions based on changes in polymerisation and drawing conditions.
• Nylon 6 has a lower elastic modulus and better elastic recovery and therefore provides softer, more flexible fabrics.
• At higher temperatures, like 180°c, nylon 6/6 shows markedly better heat age strength at 11.5kg, compared to nylon 6 of only 2.5kg.
• The fibres of nylon 66 are 33% more resistant to abrasion than nylon 6, withstanding up to 60,000 cycles compared to 40,000 in the case of nylon 6.
• With low creep, and more crystallinity, nylon 66 is slightly more rigid, allowing good stretch recovery and higher abrasion resistance.

Properties of Nylon 6 vs Nylon 66

The properties and variations within commodity plastics, and in this case nylons, are not as stark as they would be with, say, steels.

Having said that, when we begin to subtly alter the underlying structure and its fillers and additives, many more commodity and specialist grades are achievable creating a wider range of properties and as a result, a broader scope of application.

As polyamides, while having their own defined benefits, they do also share many core performance characteristics.

• Superb wear resistance
• Rigidity, hardness and toughness
• High mechanical damping
• Good sliding properties
• High mechanical strength
• Good for Electrical insulation
• Strong resistance to high energy radiation
• Good machinability

So, while maintaining these core property values, they do still provide different attributes.

Nylon 6 vs Nylon 66: Differences and Comparisons

Nylon 6

Nylon 66

Resistance to Hydrocarbons

• Superior

Mould Shrinkage*

• Lower Shrinkage

Higher Shrinkage

Impact Resistance

• Superior

Easiness To Colour

• Lustrous Colour

Less
Eye-Catching

Water Absorption Speed

• Superior

Recyclability Potential

• Superior

Molecular Mobility

• Superior

Elastic Recovery

• Superior

Dye Affinity

• Superior

Crystalline

• More

Less

Heat Deflection Temperature

• Superior

Melting Point

(215° - 220°c)

(250° - 265°c)

Chemical Acid Resistance

• Superior

Rigidity

• Superior

Colour-Fastness

• Superior

Temperature Resistance

• Superior

Ability to clean

• Superior

Elastic Modulus

• Superior

Internal Structure

Less compact

• More compact

Polymerization Formation

Open Ring

• Condensation

Moisture Regain

4 - 4.5%

4 - 4.5%

Monomer Requirements

2

• 1

Density

1.2 g/ml

• 1.15 g/ml

Degree of Polymerization

200

• 60-80

Mould Shrinkage

Most notable of these distinctions is mould shrinkage.

Nylon 6's lower mould shrinkage gives more assurity of accurate dimensions for all manufactured goods.

Whereas the greater mould shrinkage of Nylon 66 means that when it is exposed to cooler air in solidification, its material shape will have more susceptibility to alteration after processing, which must be factored in.

Other highly relevant differences are their relative water absorption rate and heat deflection values.

Nylon 6 has higher water absorption and lower heat deflection temperature, and as such is less suited to applications where high-temperature water is present.

Nylons Use As An Engineering Plastic

Nylons take their place among the engineering plastics due to a valuable combination of strength, rigidity and toughness.

Applications vary from gears, door handles, bearings, brushes, sprockets, power tool housing and even bicycle wheels, to name just a few.

When considering using nylon for a project, a vital factor is that nylons do absorb moisture, which can alter its properties and thus, its dimensional stability.

To offset this, a form of reinforcement, often glass, can be introduced to create an incredibly strong and impact resistant material.

Performance Comparison of Nylon 6 and 66

Nylon 6 Performance

Nylon 6 excels in damper conditions, having better impact strength and flex fatigue than nylon 66.

It can also be processed at a lower temperature and is less crystalline in structure, meaning mould shrinkage is reduced.

It is also available in transparent grades.

sft contains other products and information you need, so please check it out.

However, Nylon 6 does have the highest level of absorption of any nylon, showing dimensional instability and fluctuating mechanical and electrical performance, some of which can be countered by alloying with low-density polyethylene.

As a result of all of this, Nylon 6 tends to be used for components requiring higher impact strength than nylon 66, but where higher yield strength is not a prerequisite.

Nylon 6 can be used in a host of varying applications, including:

• Stadium seats
• Hosiery
• Radiator grills
• Industrial yarn
• Toothbrush fibres
• Wear Strip and Chain Guards
• Machine Guards
• Rotor slot wedges
• Firearms
• Upholstery
• Heavy-duty fabrics
• Circuit insulation boards
• Switchgear
• Seals

Nylon 66 Performance

Nylon 66 is the most commonly used of all the nylon groups:

Without fillers, it retains strength across the widest range of temperatures and the highest level of moisture exposure than any other nylon.

It also exhibits good abrasion resistance and the lowest permeability to mineral oils, gas and fluorocarbon refrigerants.

Nylon 66 is also reported to have better chemical resistance to saturated calcium chloride, and many reports suggest that 6/6 has better weathering properties too.

Nylon 66 is also a popular material for electrical components, and as a replacement for metals in die-cast hand tool bodies.

Another significant advantage is its Heat Deflection Temperature (HDT) compared to Nylon 6. Therefore, Nylon 66 is clearly a great choice in wet conditions, but not so much when dry.

Nylon 66 has high moisture absorption, low impact strength, and poor ductility. It is also the most susceptible to UV penetration and oxidative degradation.

Nylon 66 is often found in:

• Friction bearings
• Tire cord
• Carpets
• Battery modules
• Automotive airbags
• Conveyor belts
• Parachutes
• Apparel
• Seat belts

It is important to note that both of these nylon groups have a lower resistance to weak acids than 6/10, 6/11 and 6/12. And, that ALL nylons will substantially degrade when exposed to fermented 15% ethanol gas.

Final Thoughts and Comparisons

Processing method, aesthetics, and mechanical characteristics must all be taken into account when assessing the right nylon for a project.

Nylon 6 for example, is a great choice if a lightweight Engineering Plastic is a prerequisite. It has good insulation properties, and damping values, as well as good toughness, rigidity and hardness.

Nylon 6 is also the standout choice if resistance to high impact and internal stresses are required and if aesthetics are a factor. Its lustrous look and ease of colouring make it the more attractive option on the eye.

Nylon 6 is also an ideal choice for applications in the automotive industry, as well as military and industrial components, commonly used for firearms, engines, gears and so on.

It is important to note, however, that Nylon 6 is not the right option where the high water temperature is a factor due to its high water absorption and lower heat deflection rate.

Here, Nylon 66 would be a better choice.

In contrast, Nylon 66 should be utilized where a high performing engineering plastic is needed in higher temperature environments.

Its greater rigidity and good tensile modulus make it a fantastic material for applications that need to last longer over repeated performance, such as friction bearings, tire ropes or radiator caps.

There are also many more nylons to consider that each has different performance advantages and property values, so it can be seen that within the plethora of nylons, selecting the right one is often a case of making a favourable compromise.

For this reason, we advise seeking expert advice before putting pen to paper on any nylon-based project.

Looking for more information on Nylon 6 vs 66? Contact your local centre and we'd be pleased to help you further!

Nylon 66, a versatile synthetic polymer, has gained immense popularity in various industries due to its exceptional properties and wide range of applications. As one of the most commonly used engineering plastics, Nylon 6:6 has revolutionized numerous fields, offering unparalleled strength, durability, and versatility. In this article, let&#;s EuP Egypt will delve into the world of Nylon 6.6, exploring its composition, properties, notable benefits, and diverse applications.

1. What is nylon 66?

Nylon 66, also known as nylon 6-6, nylon 6/6, nylon 6.6, or nylon 6:6, is a type of nylon polyamide (polyamide 6 6) or nylon. It is one of the most commonly used materials in the textile and plastic industries, alongside nylon 6.

Nylon 6:6 derives its name from the two monomers it comprises, namely hexamethylenediamine and adipic acid, each containing 6 carbon atoms. Apart from its outstanding physical properties, nylon 6-6 is favored due to the low cost of its precursors.

The synthesis of nylon 66 involves the polycondensation of hexamethylenediamine and adipic acid. Equal amounts of these two monomers are combined in water. In the original method, the resulting salt, composed of ammonium and carboxylate, is isolated. And then heated, either in batches or continuously, to initiate polycondensation.

The removal of water promotes polymerization by facilitating the formation of amide bonds between the acid and amine groups. This polymerization can occur in a concentrated aqueous mixture containing hexamethylenediamine and adipic acid.

At this stage, the resulting product can be extruded and granulated or directly spun into fibers through a process called extrusion. The polymer is forced through a spinneret, which is a small metal plate with fine holes, and then cooled to form filaments.

2. Nylon 66 material properties

Nylon 6:6 possesses several notable material properties that make it highly desirable in many applications. These properties of nylon 6/6 material properties include:

2.1. Nylon 6 6 structure

Nylon 6.6 is formed through the condensation polymerization of hexamethylenediamine and adipic acid. This results in a repeating unit composed of six carbon atoms (hexamethylene) linked by amide groups. The chemical formula for nylon 66 is (NH-(CH2)6-NH-CO-(CH2)4-CO-)n, where n represents the number of repeating units in the polymer chain.

2.2. Nylon 6 6 molecular weight

The molecular weight of nylon 6:6 can vary depending on the manufacturing process and desired nylon 66 properties. On average, the molecular weight of nylon 6:6 ranges from 20,000 to 50,000 grams per mole. This relatively high molecular weight contributes to the material&#;s strength and durability.

The molecular weight of 66 nylon is an important factor that affects its mechanical and thermal properties. Higher molecular weight generally results in increased tensile strength, impact resistance, and heat resistance. It also affects other characteristics of nylon 6:6, such as crystallinity, melting point, and viscosity.

2.3. Nylon 66 density

The density of nylon 6:6 is typically around 1.14 to 1.15 grams per cubic centimeter (g/cm³). This makes it a moderately dense material. Nylon 6/6 density contributes to its lightweight nature, which is advantageous in applications where weight reduction is important, such as in the automotive and aerospace industries.

2.4. Nylon 66 melting point

Nylon 6-6 has a relatively high melting point compared to other thermoplastics. The melting point of nylon 6:6 typically ranges from 255 to 265 degrees Celsius (491 to 509 degrees Fahrenheit). This high melting point enables nylon 66 to withstand elevated temperatures without losing its structural integrity. It also allows for various processing techniques, including injection molding and extrusion.

The combination of moderate density and high melting point makes nylon 6/6 suitable for a wide range of applications. Its density provides strength and durability while maintaining a lightweight profile. The high nylon 6/6 melting point ensures stability and resistance to deformation under high-temperature conditions.

3. Advantages of using nylon 66

Nylon 6-6, a type of polyamide (polyamide 66), is a versatile and widely used synthetic material with various applications across industries. Its unique nylon-6 6 properties make it an advantageous choice for numerous purposes.

Strength and Durability: Nylon 6:6 exhibits excellent tensile strength and durability, making it ideal for demanding applications. It can withstand high mechanical stress, making it suitable for use in heavy-duty components, automotive parts, and industrial machinery.

Heat Resistance: Nylon 6:6 has exceptional heat resistance properties, allowing it to maintain its structural integrity at elevated temperatures. This feature makes it a preferred choice in applications that involve exposure to high temperatures, such as engine parts, electrical connectors, and cookware handles.

Chemical Resistance: Nylon 6:6 possesses excellent resistance to various chemicals, including oils, greases, fuels, and solvents. This makes it suitable for use in industries where exposure to corrosive substances is common, such as automotives, chemical processing, and oil and gas industries.

Moisture Absorption: Nylon 6:6 has a lower moisture absorption rate compared to other nylon materials. This characteristic ensures that the material retains its dimensional stability even in high-humidity environments.

Consequently, Nylon 66 finds applications in outdoor equipment, sports gear, and components exposed to moisture.
Wear Resistance: Nylon 6:6 exhibits excellent wear resistance properties, enabling it to withstand friction and abrasion. This makes it suitable for applications involving sliding or rotating components, such as bearings, gears, and conveyor belts.

Electrical Insulation: Nylon 6:6 possesses good electrical insulation properties, making it suitable for electrical and electronic applications. It is commonly used in wire insulation, connectors, and circuit board components.

Ease of Processing: Nylon 6:6 can be easily processed using techniques like injection molding, extrusion, and blow molding. Its versatility in processing methods enables manufacturers to create complex shapes and designs, resulting in cost-effective production.

Lightweight: Nylon 6:6 offers a favorable strength-to-weight ratio, making it an attractive option in industries that require lightweight materials without compromising structural integrity. It finds applications in automotive components, consumer goods, and aerospace industries.

4. Common applications of nylon 66

Nylon 6:6 has exceptional strength, durability, and resistance to wear and tear, making it a popular choice for a wide range of products.

Textiles: 6 6 nylon is extensively used in the textile industry to create clothing, sportswear, and outerwear fabrics. It&#;s high tensile strength and abrasion resistance make it ideal for applications that require durability, such as backpacks, luggage, and heavy-duty workwear.

Automotive Industry: Nylon 66 is widely used for various components in the automotive sector. It is commonly found in engine components, fuel systems, electrical connectors, and under-the-hood parts due to its excellent resistance to heat, chemicals, and mechanical stress.

Electrical and Electronics: The industry relies on Nylon 6/6 for its insulating properties and high dielectric strength. It is commonly used in wire and cable insulation, electrical connectors, circuit breakers, and electronic housings.

Consumer Goods: 6 6 nylon is found in a plethora of consumer products. It is commonly used to manufacture household items such as toothbrushes, combs, brushes, zippers, buttons, and fasteners. Its lightweight nature and chemical resistance make it suitable for applications in the kitchen and bathroom.

Industrial Applications: 66 nylon is extensively employed in various industrial applications. It is used in the production of conveyor belts, hoses, seals, gaskets, and bearings due to its excellent mechanical properties and abrasion resistance. Nylon 6/6 is also utilized to manufacture industrial machinery components and tools.

Sports and Recreation: Nylon 66&#;s strength and durability make it ideal for sports and recreational equipment. It is commonly used to produce tennis racket strings, fishing lines, camping gear, hiking backpacks, and protective gear such as helmets and knee pads.

Medical Field: Nylon 6-6 is employed in medical devices and equipment due to its biocompatibility and resistance to sterilization processes. It is used in surgical sutures, catheters, dental floss, and orthopedic implants.

5. Introduction of EuP Egypt PA66 (nylon66) engineering plastic compound

PA66 Compound &#; EuP Egypt PA66 (Nylon 66) engineering plastic compound refers to a mixture or blend of Polyamide 66 (PA66) resin with various additives and reinforcing agents to enhance its properties and processability. PA66 is a thermoplastic material known for its high strength, durability, and excellent mechanical properties.

The engineering plastic PA66 compound typically includes additives such as plasticizers, stabilizers, reinforcements, flame retardants, lubricants, and reinforcing agents. These additives are mixed with the PA66 resin during the compounding process to achieve specific performance characteristics, such as improved impact resistance, heat resistance, chemical resistance, dimensional stability, and reduced friction.

One of the significant advantages of engineering plastic PA66 compound is its exceptional mechanical strength. It exhibits excellent tensile and flexural strength, making it suitable for applications requiring structural integrity and load-bearing capacity. This strength allows PA66 compounds to withstand heavy loads, impacts, and vibrations, making them ideal for automotive components, industrial machinery, and structural parts.

Additionally, the engineering plastic PA66 compound possesses excellent heat resistance. It can withstand high temperatures without significant deformation, making it suitable for applications exposed to elevated temperatures, such as engine components and electrical enclosures.

Due to its exceptional properties, engineering plastic PA66 compound finds extensive applications across multiple industries. In the automotive sector, it is used for manufacturing engine components, fuel system parts, electrical connectors, and various interior and exterior components.

In electrical and electronics, it is employed for switches, connectors, and insulating parts. Industrial machinery utilizes PA66 compounds for gears, bearings, rollers, and conveyor parts. Additionally, consumer goods such as sports equipment, appliances, and power tools benefit from the strength and durability of the PA66 compound.

Engineering plastic PA66 compound is a highly versatile material that offers exceptional mechanical strength, heat resistance, chemical resistance, dimensional stability, and ease of processing.

Its wide range of applications across industries highlights its suitability for demanding environments and the manufacturing of high-performance components. As technology continues to advance, the demand for PA66 compounds is expected to grow, driven by the need for reliable, durable, and innovative solutions in various sectors.

If you would like to know more details about our filler masterbatch product in particular, as well as our other masterbatches, please fill out this form or contact us via / number. We are happy to answer all your product questions and concerns!

For more nylon 66 yarninformation, please contact us. We will provide professional answers.