LFT-G ブランド PA6 ポリアミド 6 ナイロン 6 充填長ガラス繊維 40 自動車部品用オリジナルカラー

What is PA6 plastic?

polyamide (PA), usually called Nylon, is a hetero-chain polymer containing amide group (-NHCo -) in the main chain. It can be divided into aliphatic group and aromatic group. It is the earliest developed and the most used thermoplastic engineering material.

Polyamide main chain contains many repeated amide group, used as a plastic called nylon, used as a synthetic fiber called nylon. A variety of different polyamides can be prepared according to the number of carbon atoms contained in binary amines and dibasic acids or amino acids. At present, there are dozens of polyamides, among which polyamide-6, polyamide-66 and polyamide-610 are the most widely used.

Polyamide-6 is an aliphatic polyamide, with light weight, strong strength, wear resistance, weak acid and alkali resistance and some organic solvents, easy molding and processing and other excellent properties, widely used in fiber, engineering plastics and thin films and other fields, but PA6 molecular chain segment contains strong polarity amide groups, easy to form hydrogen bonds with water molecules, The product has the disadvantages of large water absorption, poor dimensional stability, low impact strength in dry state and low temperature, strong acid and alkali resistance.

Advantages of nylon 6:

High mechanical strength, good toughness, high tensile and compressive strength.

Outstanding fatigue resistance, the parts after repeated bending can still maintain the original mechanical strength.

High softening point, heat resistant.

Smooth surface, small friction coefficient, wear-resistant.

Corrosion resistance, very resistant to alkali and most salts, also resistant to weak acids, oil, gasoline, aromatic compounds and general solvents, aromatic compounds are inert, but not resistant to strong acids and oxidants. It can resist the corrosion of gasoline, oil, fat, alcohol, alkaline and so on, and has good anti-aging ability.

It is self-extinguishing, non-toxic, odorless, good weather resistance, inert to biological erosion, and has good antibacterial and mildew resistance.

Has excellent electrical performance, good electrical insulation, nylon volume resistance is high, high breakdown voltage resistance, in dry environment, can work frequency insulation material, even in high humidity environment still has good electrical insulation.

Light weight, easy dyeing, easy forming, because of low melting viscosity, can flow quickly.

Disadvantages of Nylon 6:

Easy to absorb water, water absorption, saturated water can reach more than 3%.

Poor light resistance, in the long-term high temperature environment will oxidize with oxygen in the air, the color turns brown at the beginning, and the subsequent surface is broken and cracked.

Injection molding technology requirements more strict, the existence of trace moisture will cause great damage to the quality of molding; The dimensional stability of the product is difficult to control because of thermal expansion. The existence of sharp Angle in the product will lead to stress concentration and reduce the mechanical strength; If the wall thickness is not uniform, it will lead to the distortion and deformation of the parts. High precision of equipment is required in post-processing.

Will absorb water, alcohol and swelling, not resistant to strong acid and oxidant, can not be used as acid-resistant materials.

Why filling Long Glass Fiber?

PA6 has excellent properties such as light weight, strong strength, abrasion resistance, weak acid and alkali resistance and some organic solvents, and easy molding and processing. It is widely used in the fields of fibers, engineering plastics and films. However, the molecular chain segment of PA6 contains highly polar amide groups, which are easy to form hydrogen bonds with water molecules. The product has the disadvantages of large water absorption, poor dimensional stability, low impact strength in dry state and low temperature, strong acid and alkali resistance. With the development of science and technology and the improvement of life quality, the defects in some properties of traditional PA6 materials have limited its development in some fields. In order to improve the performance of PA6 and expand its application field, PA6 should be modified.

充填強化修飾は、PA6 の物理的修飾の一般的な方法です。これは、ガラス繊維や炭素繊維などのフィラーをマトリックスに追加して、材料の機械的特性、難燃性、熱伝導率、および寸法安定性を大幅に改善することによるPA6の変更を指します。

PA6-LGFの応用とは？

30% ガラス繊維強化 PA6 の変性セクションは、電動工具シェル、電動工具部品、エンジニアリング機械部品、自動車部品の加工に最適な材料です。機械的特性、寸法安定性、耐熱性、耐老化性が大幅に向上しています。耐疲労強度は未強化の2.5倍であり、改質効果は最も明白です

LGF 30% 充填変性 PA6 の加工と成形のポイント

30% ガラス繊維強化 PA6 製品の収縮率は 0.3% に抑えることができます。純粋な PA6 の収縮率は 1% から 1.5% の間で、30% のガラス繊維強化材を追加すると約 0.3% に減少します。実際の経験では、ガラス繊維を追加するほど、PA6 樹脂の収縮が小さくなることが示されています。しかし、繊維の量が増えると、表面に繊維が浮き、相溶性が低下するなどの結果が生じます.30％のガラス繊維強化効果は比較的良好です。

30% ガラス繊維強化 PA6 リサイクル素材は、3 回以上使用しないでください。30% ガラス繊維強化 PA6 にはリサイクル素材は含まれていませんが、お客様がリサイクル素材を使いすぎると、製品の変色や機械的および物理的特性の急激な低下を引き起こしやすいため、投与量を 25% 未満に抑える必要があります。プロセス条件の変動、リサイクル材料と新しい材料を混合使用する前に乾燥する必要があります。

製品を熱湯に入れ、ゆっくりと冷やしてください。ガラス繊維は、射出成形プロセスで流動方向に沿って配向するため、機械的特性が向上し、配向方向に収縮し、製品の変形や反りが発生するため、金型設計では位置とゲートの形状は合理的である必要があり、プロセスは金型の温度を改善できます。製品を熱湯に入れてゆっくりと冷却する必要があります。

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