What is LCP material
2025-07-25
1. What is LCP material?
Liquid crystal polymer (LCP) materials are a type of specialty engineering plastic. They are named for their ability to exhibit a liquid crystal state when heated to a specific condition.
LCP resin possesses outstanding properties including exceptional mechanical strength, low melt viscosity, low thermal expansion coefficient, and low dielectric loss. It finds extensive applications in high-frequency, high-speed electronic communications, biomedicine, composite materials, and other fields.
Simultaneously, due to the tendency of LCP resin to form microfibrillar structures during melting through molecular chain orientation, the material exhibits properties and morphology similar to fiber-reinforced plastics. Consequently, it is also referred to as "self-reinforced plastic" and is experiencing rapid development in industrial applications.
Liquid crystal polymer resin is generally beige, as shown in the left picture. It also appears as white opaque solid powder. The color of LCP reinforced with carbon fiber may be slightly lighter and have a certain gloss. The color of LCP reinforced with some mineral fillers will appear black, as shown in the right picture.
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2.Properties of LCP
LCP materials have ultra-high strength and high modulus mechanical properties. Even the mechanical strength of products made of unreinforced liquid crystal polymers can reach or even exceed that of products made of ordinary engineering plastics reinforced with glass fibers. The mechanical properties of LCP materials reinforced with glass fibers, carbon fibers and mineral fibers are far superior to those of common engineering plastics.
In addition, LCP has the following properties:
- Excellent electrical properties. Compared to commonly used communication materials such as polyimide (PI), polytetrafluoroethylene (PTFE), and polyphenylene oxide (PPO), LCP resin exhibits lower dielectric loss and permittivity, along with superior adhesion to metal foils. These characteristics make it particularly well-suited for high-frequency signal transmission applications.
- Outstanding dimensional stability. LCP features an extremely low thermal expansion coefficient and molding shrinkage rate, making it highly suitable for producing ultra-thin, micro-structures such as high-frequency components like communication antennas—precision parts that are extremely sensitive to dimensional errors.
- Exceptional heat resistance. LCP can withstand the high temperatures of reflow soldering in electronic manufacturing processes. This processing technique, which involves instantaneous temperatures exceeding 200°C, places high demands on the material's heat resistance.
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Self-enhancing capabilities. Conventional polymer materials (such as polycarbonate and polyamide) exhibit lower mechanical properties as the product becomes thinner; however, due to its unique molecular structure, LCP actually exhibits higher mechanical strength as the product becomes thinner. This unique property makes it widely applicable in the lightweight design of PCBs.
3. Classification of LCP materials
LCP materials have different heat resistance properties according to the different synthetic monomers, and are divided into Type I, Type II and Type III, corresponding to high, medium and low heat resistance levels respectively. Type II LCP has higher heat resistance and good processability and is more common in the market. DuPont in the United States is the original inventor of LCP materials. It invented and mass-produced it in 1950. Japan then began to tackle LCP technology in 1979. With its first-mover advantage, Japan and the United States account for more than 80% of the market share in LCP research and development and production. The world's major LCP resin material manufacturers include Celanese, Polyplastics, Sumitomo Chemical, and Toray.
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Liquid crystal polymer
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Classification
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Temperature
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Factory
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Description
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Application |
|
Type Ⅰ
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250~350℃
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CBO
Sumitomo Chemical
|
Type I LCP materials have highheat resistance (above 320℃).
However, the processing conditions are relatively challenging.
It is mainly used in connectors in the electrical and electronic fields |
·Connector
·Electronic and Electrical Components
|
|
|
Type Ⅱ
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180℃~250℃
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Celanese
Polyplastics
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Type II Liquid Crystal Polymersperformance,
including high temperature resistance (above 220℃),
and excellent processing properties,
making it an optimal matrix for the preparation of antenna LCP films.
It is the optimal matrix for the preparation of antenna LCP films. |
·LCP film | |
|
Type Ⅲ
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100℃~200℃
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Toray
Esatman
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The heat distortion temperature of Ⅲ type material is lower
lower, the heat resistance of the product is slightly poorer, It is the least used product at present |
·Cooling Fan
·Connecting pipe
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4. Application range of LCP materials
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Application Sectors
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Typical Application Scenarios
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|---|---|
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1. Electronics and communications
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· High Density SMT Connectors · IC Packaging Bases · 5G RF Antennas
· Millimeter Wave Communication Components ·High Frequency FPC Materials for Wearable Devices
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2. Automotive electronics
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·ADAS Sensor Housings · High Temperature Plugs ·Engine Control Unit (ECU) Housings
·Electric Vehicle BMS Connection Parts
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3. Medical equipment
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·Disposable endoscopic parts ·Syringes, valves and microfittings
·Precision parts that can withstand high temperature steam sterilization
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4. Industrial and consumer electronics
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·Micro-motor housings ·High-frequency coil bobbins
·High-performance structural components for smartphones and notebooks
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If you need LCP resin, please contact us 👉 +86 15837933829
5. Why LCP Resin Has Extensive Applications in the 5G Field
In the fields of high-frequency, high-speed electronic communications, biomedical applications, and composite materials, numerous materials can be utilized, such as polyimide (PI), modified polyphenylene ether (MPPE), and polytetrafluoroethylene (PTFE). Yet why has LCP material emerged as the dominant choice? The reasons will be explained below.
5.1 Extremely resistant to high temperatures
Reflow soldering is a common assembly process used for electronic components such as connectors, SMT packages, and coil forms, and it places extremely high demands on short-term high-temperature resistance.
The requirements for mainstream reflow soldering processes include:
- Peak temperature: 245–260°C
- Preheating temperature: 150–200°C
- Constant temperature: 180–220°C
LCP is the material of choice for meeting the above requirements
Comparison of Other Heat-Resistant Materials for Reflow Soldering:
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Material
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Problems
|
|---|---|
|
PA66
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·Absorbs moisture easily, and warping is likely to occur during reflow soldering after moisture absorption.
·Cannot withstand temperatures of 260°C for short periods.
|
|
PEEK（
polyetheretherketone
）
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High costs
|
|
PPS (polysulfone)
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·High heat resistance
·Suitable for thick-walled products; not suitable for thin-walled products |
|
PI (Polyimide)
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Commonly used in the production of flexible circuit boards and insulating boards;
not a typical choice of material for conventional PCBs
|
|
PPA (Polyphthalimide)
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· Superior performance compared to PA66,
· Short-term heat resistance still falls short of 260°C |
5.2 Excellent machinability.
Although numerous materials can be applied in the field of high-frequency electronic communications, LCP resin demonstrates superior processing performance. It possesses high flow velocity, making it suitable for ultra-thin-wall structures and injection molding processes. This resin is particularly well-suited for thin-wall antenna structures and 0.1mm ultra-micro precision components in 5G applications.
5.3 Stable electrical properties.
In high-frequency signal applications (particularly millimeter-wave), the electrical properties of materials directly impact signal transmission quality. Therefore, polymeric materials must exhibit low dielectric constant and low dielectric loss characteristics.Compared to modified polyimide (PI) materials more commonly used in high-frequency 5G applications, LCP exhibits a dielectric constant (Dk) of only approximately 3.0+ and a dielectric loss (Df) of just 0.022. While these values show no significant difference from PI resin, LCP resin demonstrates superior stability under humid conditions with virtually no change. This enables it to maintain excellent electrical properties even in harsh environments such as rainy conditions, outdoor settings, high temperatures, and humidity.
6. Main supplier
Luoyang Baiyou - As a supplier of over 20 specialized engineering plastics, we recommend the following brands of LCP resin pellets. These two materials hold a significant market share due to their stable performance and reliable supply capabilities.
6.1 Celanese Vectra
Celanese is one of the world's major manufacturers and suppliers of LCP materials. Its main brands include Vecrta and Zenite series, covering almost all processing methods, from injection molding, extrusion molding, co-extrusion processing and blow molding. Customers can find the right material to meet their processing needs.
Vectra E130i, a high-performance liquid crystal polymer manufactured by Celanese, is widely used in a variety of applications.
This material contains 30% glass fiber reinforcement, providing enhanced strength and heat resistance. It also contains built-in flame retardants, enabling it to achieve a UL 94 V-0 flame retardant rating in a 0.75mm test environment without the addition of extra flame retardants. It is suitable for automotive parts, high-performance lighting fixtures, and other applications.
Vectra MT1300 is the main supply grade of liquid crystal polymer produced by Celanese. It can be processed by injection molding and extrusion molding. The material has obtained FDA FCN 742, DMF 8464, MAF 315 and USP Class VI certification, serving biocompatibility testing requirements, and can be used for medical grade and food contact grade applications.
6.2 Polyplastics Laperos
Laperos is a brand of LCP materials produced by Japan Polyplastics. Together with Celanese, it occupies almost 60% of the global market share of LCP materials. With its long experience in the preparation of engineering plastics, it can almost meet any consumer's demand for LCP.
Laperos E525T is an impact-modified LCP material containing 25% mineral filler. Without flame retardant addition, its natural flame retardancy reaches UL94 V-0 level. It is an excellent high-grade flame retardant material that can be processed by injection molding. Its main feature is the low dust generation during the processing. It has a wide range of applications in automotive parts, electronic and electrical equipment parts, electronic product surface mounting technology (SMT applications) and industrial applications.
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