LCP Multi-filament Yarn
Hakely is a thermotropic liquid crystal polymer (LCP) multifilament yarn. It is synthesized by acidolysis of 4-hydroxybenzoic acid (HBA) with 6-hydroxy-2-naphthoic acid (HNA).
Liquid crystal polymers can form regions of highly ordered structure while in the liquid phase. This unique characteristic is applied in melt spinning, while molecules are aligned in the longitudinal (extrusion) direction.
Molecular arrangement and high-strength of molecular bonds provide exceptional mechanical yarn strength, high modulus, and dimensional stability of LCP yarn, even under high stress.
LCP yarn is designed for extreme operating temperatures; in hot environment (LCP melting point is over 320°C), but good performance achieves also in minus temperature (-50/-60°C) typical for aerospace application. Their advantage is good fatigue resistance after many cycles of alternating hot and cold phases.
Comparing to other High-Tech fibres as para-aramids, LCP yarns have advantage in higher abrasion resistance, better cut resistance, higher tensile strenght, better ability to absorb impact force, lower humidity absorption (below O,1%) and good dielectric strenght. Additionally, LCP yarns offer extraordinary chemical resistance to alkali and acid solutions.
All mentioned properties of Hakely yarns bring several benefits in application of electronics, communication technologies, optical cables, aircrafts, protective garments, reinforcement composite materials, transmission belts, ropes and others.
Main Features
Main Features: HAKELY Yarn
- High strength and modulus – three times stronger than PET yarn.
- Ultra-Low water absorption – moisture absorption <0.1%, suitable for humid and hot operation environments.
- High thermal resistance - melting point over 320°. Good resistance also in minus temperature (-50/-60°C), where the tensile strength of the yarn increases.
- Superior fatigue resistance – in bending, folding, and twisting.
- Very good abrasion and cut resistance.
- Low dielectric constant and low dielectric loss.
- High dimensional stability - due to its unique liquid crystalline arrangement of molecules.
Abrasion Resistance
Yarn on Yarn – dry condition
Physical Mechanical Properties
Properties | Units | Hakely LCP Yarn | Para-aramid Yarn |
Density | g/cm3 | 1.40-1.41 | 1.44-1.45 |
Melting Point | °C | >320 | none |
Tenacity | cN/dtex | 22.9 | 19.4 |
Wet Tenacity | cN/dtex | 22.9 | 17.6 |
Initial Modulus | cN/dtex | 530 | 493 |
Breaking Elongation | % | 3.3 | 3.0 |
Hot Air Shrinkage (190℃ x 3min x 0.01cN/dtex) | % | 0.13 | 0.13 |
Moisture Absorption (20°C, 65% RH) | % | <0.1 | 4.2 |
Limiting Oxygen Intex (LOI) | % | ≥30 | ≥30 |
Chemical Resistance
Acid and Alkaline Regents
Substance | Formula | Concentration (%) | Temperature (°C) | Time (h) | Strength Retention (%) Hakely (LCP) | Strength Retention (%) p-Aramid |
Acid | H2SO4 | 2 | 70 | 10 | 100 | 92.6 |
10 | 25 | 98.6 | 89.1 | |||
10 | 45 | 97.5 | 87.1 | |||
10 | 70 | 95.7 | 83.8 | |||
Alkali | NaOH | 2 | 70 | 10 | 94.6 | 79.9 |
10 | 25 | 100 | 87.3 | |||
10 | 45 | 95.7 | 85.6 | |||
10 | 70 | 86.4 | 70.3 |
End-User Application
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- Optical Cable
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- Conveyor Belt
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- Tire Cord Fabric
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- Webbings, Coated Fabric
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- Ropes, Canopy Line Set
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- Parachute
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- Ballistic Protection
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- Protection Garments
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- Braided Sleeve
Aerospace Application
Hakely yarn is often used to make airships and inflatable space habitats due to its low weight, high strength retention, low creep capability, and resistance to a wide temperature range (from -60°C to + 240°C).
Cords and woven fabrics made of super high tenacity Hakely yarn provide the primary structure of the vessel. Protective Garments
Hakely exhibits excellent cutting resistance, heat insulation, flame retardancy, flexibility, and low density, so it is commonly used for the production of cutting gloves, heat-resistant workwear, and cut-resistant seat fabrics.
Ropes
Hakely is widely used in main canopy lines, marine, military, and industrial ropes due to its high strength, high modulus, low creep, and abrasion resistance, and these properties can be maintained well over a wide range of temperatures. Coated Reinforcement Fabrics
Fabrics made of Hakely yarns are used as reinforcement material for mechanical rubber goods. The RFL dipping process for consequent rubber curing standardizes this. Standard rubbers such as styrene-butadiene (SBR), nitrile butadiene (NBR), natural rubber, or neoprene can be applied. Yarn Properties
LCP Yarn Properties
Item | Product Description | Linear Density | Breaking Strength | Tenacity | Elongation | Hot Air Shrinkage | ||
Unit | Dtex/Filament | (Dtex) | (Den) | (N) | (cN/dtex) | (g/D) | (%) | (%) |
LCP HT-02T0101 | 222f40 | 222 | 200 | 49.0 | >22.0 | >24.9 | 3.0 | 0.2 |
LCP HT-04T0101 | 444f80 | 444 | 400 | 98.0 | >22.0 | >24.9 | 3.0 | 0.2 |
LCP HT-06T0101 | 666f120 | 666 | 600 | 147.0 | >22.0 | >24.9 | 3.0 | 0.2 |
LCP HT-08T0101 | 888f160 | 888 | 800 | 196.0 | >22.0 | >24.9 | 3.0 | 0.2 |
LCP HT-10T0101 | 1110f200 | 1111 | 1000 | 245.0 | >22.0 | >24.9 | 3.0 | 0.2 |
LCP HT-15T0101 | 1670f300 | 1670 | 1500 | 367.0 | >22.0 | >24.9 | 3.0 | 0.2 |
* Hot Air Shrinkage: 190°C x 3min x 0.01 cN/dtex