SMTパッチ赤糊の基礎知識を編集・解説

基本知識

SMT パッチの赤い接着剤は、加熱後に固化するという点ではんだペーストとは異なり、凝固点温度が 150 ℃ の一種の多希釈化合物です。この時、赤い糊が直接ペースト状から固まり始めます。

SMTパッチの赤い接着剤には、粘度の流動性、温度特性、湿潤特性などがあります。この赤い接着剤の特性によると、生産で赤い接着剤を使用する目的は、部品をPCB表面にしっかりと貼り付けて落下を防ぐことです。

印刷機またはディスペンサーで使用する場合:

1.貼付剤の品質保持のため、冷蔵庫(5±3℃)で保管してください。

2.冷蔵庫から取り出して使用する前に、室温で2〜3時間保管してください。

3. トルエンまたは酢酸エチルを使用して、ディスペンス用のゴム製ホースをクリーニングできます。

①分注チューブにバックストッパーを追加すると、より安定した分注量が得られます。

②推奨塗布温度は30～35℃です。

③専用のグルーディスペンサーを使用してゴムホースを分離し、接着剤の飛び散りを防止してください。

水中での泡のりのこすり：推奨されるのりのこすり取り温度は30〜35℃です注意事項：赤

冷蔵環境から接着剤を取り出した後は、室温に達するまで開封して使用することはできません。汚染を避けるために

元のパッケージ製品を染色する場合、使用済みのパッチ接着剤は元のパッケージに戻してはなりません。

印刷方法

(1)印刷方法：スチールスクリーン彫刻穴は、部品の種類と基材の性能、その厚さ、穴のサイズと形状に応じて決定されます。その利点は、高速で高効率です。

PCBA processing manufacturers

(2) Dispensing method: using compressed air, the red glue is applied to the substrate through a special dispensing head. The size, number and size of the dispensing point are controlLED by parameters such as time and pressure pipe diameter. The dispensing machine has flexible functions. For different parts, we can use different dispensing heads, set parameters to change, or change the shape and number of dispensing points to achieve the effect. The advantages are convenience, flexibility and stability. The disadvantage is that it is easy to have wire drawing and bubbles. We can adjust the operation parameters, speed, time, air pressure and temperature to minimize these shortcomings.

(3) The needle rotation method is to immerse a specially made needle film into a shallow glue tray, and each needle has a glue point. When the glue point contacts the substrate, it will be separated from the needle. The glue amount can be changed by the shape and diameter of the needle. Curing temperature 100 ℃ 120 ℃ 150 ℃ Curing time 5 minutes 150 seconds 60 seconds TypICal curing conditions: Notes:

1. The higher the curing temperature and the longer the curing time, the stronger the bonding strength.

2. Since the temperature of the patch adhesive will vary with the size and mounting position of the substrate parts, we suggest to find the most appropriate hardening conditions. Storage of red glue: it can be stored for 7 days at room temperature, more than 6 months at less than 5 ℃, and more than 30 days at 5~25 ℃.

Due to the viscosity, fluidity, wetting and other characteristics of SMT patch red adhesive affected by temperature, SMT patch red adhesive must have certain use conditions and standardized management.

(1) The red glue shall have a specific serial number, which shall be numbered according to the quantity, date and type of incoming materials.

(2) The red glue shall be stored in a refrigerator at 2~8 ℃ to prevent its characteristics from being affected by temperature changes.

(3) The red glue shall be heated for 4 hours at room temperature, and used in the first in first out order.

(4) For dispensing operation, the red glue in the rubber tube shall be de bubbled, and the red glue that is not used up at one time shall be put back into the refrigerator for storage. Old glue and new glue cannot be mixed.

(5) The temperature recovery record form, temperature recovery person and time shall be filled in accurately. The user shall confirm the completion of temperature recovery before use. Generally, the expired red glue cannot be used.

Circuit board manufacturing, circuit board design, PCBA processing manufacturers will explain the basic knowledge of SMT patch red glue for you to edit.