Difference between HumiSeal 1B31 and 1A33

HumiSeal 1B31 et 1A33 are two widely used Revêtement conforme materials in Assemblage du circuit imprimé, Prototype d'assemblage de circuits imprimés, et Assemblage SMT, but they differ significantly in chemical type, performance, and application scenarios.

Understanding these differences helps manufacturers choose the right coating based on environment, cost, and reliability requirements.

Key difference: material type

The most fundamental difference is the coating chemistry:

• HumiSeal 1B31 → Acrylic coating
• HumiSeal 1A33 → Polyurethane (urethane) coating

Acrylic and polyurethane coatings have very different properties in terms of drying, durability, and resistance.

Drying and processing speed

HumiSeal 1B31 is known for its fast drying and easy processing, making it ideal for high-speed production lines in Assemblage SMT. It can become tack-free in around 10 minutes and reaches usable properties quickly

HumiSeal 1A33, on the other hand, typically requires longer curing time to achieve full performance, especially at room temperature

This means:

• 1B31 → better for fast turnaround and high throughput
• 1A33 → better for performance over speed

Chemical and environmental resistance

HumiSeal 1A33 provides much stronger chemical resistance and durability compared to 1B31. Polyurethane coatings are specifically known for resisting solvents, abrasion, and harsh environments

HumiSeal 1B31 offers good moisture protection but is less resistant to aggressive chemicals.

So:

• 1B31 → general protection (humidity, dust)
• 1A33 → harsh environments (chemicals, industrial exposure)

Retouches et réparations

This is one of the biggest practical differences in Assemblage du circuit imprimé:

• 1B31 (acrylic) → very easy to remove and rework using solvents
• 1A33 (urethane) → difficult to remove due to high chemical resistance

Pour Prototype d'assemblage de circuits imprimés, 1B31 is usually preferred because engineers often need to modify or repair boards.

Flexibility and mechanical performance

Both coatings offer flexibility, but their behavior differs:

• 1B31 → flexible and suitable for general applications
• 1A33 → more durable and resistant to mechanical stress, abrasion, and long-term wear

Applications typiques

HumiSeal 1B31 is commonly used in:

• Electronique grand public
• LED drivers and power supplies
• General Assemblage SMT production
• Prototype d'assemblage de circuits imprimés (due to easy rework)

HumiSeal 1A33 is commonly used in:

• Industrial electronics
• Automotive systems
• Aerospace and defense applications
• Harsh environments requiring chemical resistance

Cost and production considerations

• 1B31 → lower cost + faster processing
• 1A33 → higher cost + better long-term protection

For large-scale Assemblage du circuit imprimé, the choice often depends on whether speed or durability is the priority.

Summary comparison

Aperçu final

The choice between HumiSeal 1B31 and 1A33 depends on your application:

• Choisir 1B31 pour fast, cost-effective, and rework-friendly coating in Assemblage du circuit imprimé et Assemblage SMT
• Choisir 1A33 pour maximum durability and chemical resistance in demanding environments

In practice, many manufacturers use 1B31 for standard products et 1A33 for high-reliability or industrial applications, especially after validation in Prototype d'assemblage de circuits imprimés.

Obtenir un devis pour un revêtement conforme

Vous avez besoin d'un délai d'exécution rapide pour vos projets de revêtement conforme ? Soumettez votre demande dès aujourd'hui.
Envoyez-nous vos exigences et obtenez une réponse rapide de notre équipe d'ingénieurs.

✔ Réponse dans les 24 heures ✔ Soutien technique ✔ Production en petite et grande série

Veuillez activer JavaScript dans votre navigateur pour remplir ce formulaire.

Nom *

Courriel *

WhatsAPP

Matériau préféré

• Acrylique (AR)
• Silicone (SR)
• Polyuréthane (UR)
• Durcissable aux UV - UV
• Je ne suis pas sûr / Besoin de conseils

Téléchargement de fichiers

Glisser-déposer des fichiers,, Choisir les fichiers à télécharger Vous pouvez télécharger jusqu'à 8.

Veuillez compresser tous les fichiers Gerber, les fichiers de forage et les nomenclatures dans un seul fichier .ZIP ou .RAR pour un traitement plus rapide.

Message Preferred File

Message

"Veuillez énumérer les composants ou les zones qui ne doivent PAS être revêtus (par exemple, les connecteurs, les points de test). Si vous avez des exigences spécifiques concernant les matériaux de revêtement (par exemple, HumiSeal), veuillez l'indiquer dans la boîte de commentaires.

Soumettre

Shenzhen Tengxinjie Electronics Co. Ltd.