Difference between acrylic and silicone HumiSeal coatings

아크릴 그리고 silicone HumiSeal coatings are two of the most commonly used 컨포멀 코팅 types in PCB 어셈블리, 프로토타입 PCB 어셈블리, 및 SMT 어셈블리. While both provide protection against moisture, dust, and contaminants, they differ significantly in performance, flexibility, cost, and application scenarios.

Key difference: material properties

The main distinction lies in their chemical nature:

• Acrylic coatings (AR) → hard, transparent, fast-drying polymers
• Silicone coatings (SR) → soft, rubber-like, highly flexible materials

Acrylic coatings cure into a rigid protective layer, while silicone coatings remain elastic and flexible.

Drying speed and process efficiency

Acrylic coatings are known for their fast drying and easy processing, making them ideal for high-speed SMT 어셈블리 production lines. They can dry within minutes and are simple to apply.

Silicone coatings typically require longer curing time, especially if moisture curing is involved, which can slow down production throughput.

Flexibility and vibration resistance

This is one of the most important differences:

• Acrylic → relatively rigid, may crack under vibration or thermal cycling
• Silicone → highly flexible, absorbs stress and resists cracking

Silicone coatings are better suited for environments with mechanical stress, vibration, or thermal expansion.

온도 저항

Acrylic coatings perform well in moderate temperature ranges (typically up to ~120°C).

Silicone coatings offer excellent high and low temperature resistance, often operating from -55°C ~ 200°C 이상, making them ideal for extreme environments.

Chemical and environmental resistance

• Acrylic → good moisture protection, but limited resistance to harsh chemicals
• Silicone → strong resistance to chemicals, humidity, and harsh environments

Silicone coatings are preferred for automotive, aerospace, and outdoor electronics where long-term durability is critical.

재작업 및 수리

In PCB 어셈블리, rework capability is very important:

• Acrylic → easy to remove and repair using common solvents
• Silicone → 제거하기 더 어려움, requires special processes

This makes acrylic coatings highly suitable for 프로토타입 PCB 어셈블리, where frequent modifications are needed.

Cost and production considerations

• Acrylic → lower cost + faster processing
• Silicone → higher cost + better performance

For high-volume SMT 어셈블리, acrylic is often chosen for cost efficiency, while silicone is used when performance requirements justify the higher cost.

일반적인 애플리케이션

Acrylic HumiSeal coatings (e.g., 1B31):

• 가전 제품
• LED drivers and power supplies
• General-purpose PCB 어셈블리
• 프로토타입 PCB 어셈블리 (easy rework)

Silicone HumiSeal coatings:

• 자동차 전자 제품
• Aerospace systems
• Outdoor and high-humidity environments
• High-temperature applications

Summary comparison

최종 인사이트

There is no “one-size-fits-all” choice between acrylic and silicone HumiSeal coatings.

• 선택 아크릴 코팅 에 대한 cost-effective, fast, and rework-friendly solutions in PCB 어셈블리 그리고 SMT 어셈블리
• 선택 silicone coatings 에 대한 extreme environments, high reliability, and long-term durability

In practice, many manufacturers validate both options during 프로토타입 PCB 어셈블리 before selecting the most suitable coating for mass production.

컨포멀 코팅 견적 받기

귀사의 제품에 어떤 컨포멀 코팅이 적합한지 잘 모르시겠습니까? 지금 바로 전문가에게 문의하세요.
요구 사항을 보내주시면 엔지니어링 팀으로부터 빠른 답변을 받으실 수 있습니다.

24시간 대응 ✔ 엔지니어링 지원 ✔ 소규모 및 대량 생산

이 양식을 작성하려면 브라우저에서 JavaScript를 활성화하세요.

메시지 기본 설정 업로드

이름 *

이메일 *

WhatsAPP

선호 자료

• 아크릴(AR)
• 실리콘(SR)
• 폴리우레탄(UR)
• UV 경화 - UV
• 잘 모르겠음 / 조언이 필요함

파일 업로드

파일을 끌어다 놓습니다,, 업로드할 파일 선택 최대 8 파일까지 업로드할 수 있습니다.

빠른 처리를 위해 모든 거버 파일, 드릴 파일 및 BOM을 하나의 .ZIP 또는 .RAR 파일로 압축하세요.

메시지

"코팅해서는 안 되는 구성 요소 또는 영역(예: 커넥터, 테스트 포인트)을 기재하세요." 특정 코팅 재료 요구 사항(예: 휴미씰)이 있는 경우 의견란에 이를 표시하세요.

제출하기

심천 텅신지에 전자 유한 공사.