고온 저항 PA12 긴 탄소 섬유 복합 수지 스포츠 부품 자동차

PA12 Plastic

Polyamide (PA) is commonly known as nylon, and long carbon chain nylon refers to the variety of nylon with more than 10 methylene between adjacent amide bonds in the main chain of large molecules, such as PA11, PA12, PA1010, PA1212, PA1012, etc. The performance of PA12 is similar to that of PA11, but due to the shortage of castor oil, the raw material used to produce PA11, all countries are using PA12 instead of PA11.

PA12 is nylon 12, also known as polydodecactam, polylauractam, is a long carbon chain nylon. The basic material for its polymerization is butadiene, a semi-crystalline - crystalline thermoplastic material. Nylon 12 is the most widely used long carbon chain nylon, in addition to most of the general properties of nylon, low water absorption, and has high dimensional stability, high temperature resistance, corrosion resistance, good toughness, easy processing and other advantages. Compared with PA11, another long carbon chain nylon material, the price of butadiene, the raw material of PA12, is only one third of the price of castor oil, the raw material of PA11. It can replace PA11 and be applied in most scenes, and has a wide range of applications in automobile fuel pipe, air brake hose, submarine cable, 3D printing and many other fields.

characteristic

In long chain nylon, compared with other nylon materials, PA12 has great advantages, such as the lowest water absorption rate, the lowest density, low melting point, impact resistance, friction resistance, low temperature resistance, fuel resistance, good dimensional stability, good anti-noise effect. PA12 has the properties of PA6, PA66 and polyolefin (PE, PP) at the same time, achieving the combination of lightweight and physical and chemical properties, and has advantages in performance. The following table shows the performance data:

Advantage

There are a large number of non-polar methylene groups in nylon 12, which makes nylon 12 molecular chain more compliant. The amide group in nylon 12 is polar, and the cohesion energy is very large, it can form hydrogen bonds between the molecules, so that the molecular arrangement is regular. Therefore, nylon 12 has high crystallinity and high strength. Nylon 12 has low water absorption, good low temperature resistance, good air tightness, excellent alkali and oil resistance, medium resistance to alcohol, inorganic dilute acid and aromatic hydrocarbons, good mechanical and electrical properties, and is a self-flameout material.

1) Density

The relative density of nylon 12 is only 1.01-1.03, which is the smallest among all engineering plastics, which has a certain effect on reducing the quality of vehicles and reducing fuel consumption. When compared by unit volume, nylon 12 has advantages in price and performance.

2) Melting point

The melting point of nylon 12 is 172-178℃, slightly lower than nylon 11, can fully meet the requirements of automobile fuel pipe and brake pipe working environment temperature.

3) Water absorption

As we all know, the biggest disadvantage of nylon products is large water absorption, dimensional stability is difficult to ensure. And PA12 has the lowest water absorption rate of nylon products, this is due to the methylene molecules in nylon 12 greatly reduce the hydrophilic groups, which makes nylon 12 has a great advantage.

4) Impact strength

Impact strength is an important technical index, especially for nylon 12 pipe often exposed to air. Nylon 12 under -20℃ and -40℃ according to the standard test, no fracture phenomenon, fully meet the requirements of use. Nylon 12 has excellent impact resistance.

5) Low temperature performance

Nylon 12 has the lowest brittleness temperature of -70 degrees Celsius, so it can be widely used in low-temperature resistant parts.

6) Flexibility

The influence of plasticizer on the physical properties of nylon 12 is concentrated on the elastic modulus of resin. Nylon 12 has three basic types of resin, their main difference is due to the plasticizer content of different forms of flexibility. The elastic modulus of resin decreases with the increase of extractable component content of plasticizer.

7) Low wear and low friction performance

Nylon 12 has excellent low abrasion and low friction properties and self lubricating properties, so the friction noise of nylon 12 products is very low. The table below shows the values obtained for nylon 12 and other plastics by Tabor disk tests.

8) Fuel resistance

자동차에서 현재 사용되는 산소화 연료, 고방향족 연료 및 알코올의 혼합물은 많은 호스 재료를 파손시킬 수 있습니다. 테스트 후 나일론 11, 나일론 12 및 불화탄소 수지 엘라스토머만 이 환경에서 사용할 수 있습니다. 대부분의 다른 유형의 나일론은 자동차 연료의 작용으로 용해되어 크기가 변경됩니다.

9) 염화아연 용액에 대한 내성

염화아연은 자동차 아래에서 발견됩니다. 특정 온도와 습도에서 도로의 염분은 아연 도금 강판 또는 아연 함유 프라이머와 반응하여 부식성 염화아연을 형성합니다. 또한 오존 노화, 자외선, 온도 조건 등으로 인해 부품 손상 정도가 달라지고 서비스 수명이 단축됩니다.
나일론 12는 염화아연 용액에 매우 강합니다. 오존 공격에 민감한 나일론 12에는 불포화 이중 결합이 없기 때문에 오존 노화가 발생하지 않습니다. 또한, 나일론 12는 UV 저항성도 우수합니다.

10) 우수한 전기적 성능

나일론의 긴 탄소사슬 구조로 인해 전기적 특성이 우수합니다. 탄소 사슬이 긴 나일론은 수분 흡수율이 낮기 때문에 나일론 6, 나일론 66과 같은 탄소 사슬이 짧은 나일론에는 없는 습한 환경에서도 우수한 유전 특성을 유지합니다.

애플리케이션

PA12는 가장 널리 사용되는 긴 탄소 사슬 나일론입니다. 일반 나일론의 일반적인 특성을 대부분 가지고 있을 뿐만 아니라 낮은 흡수성, 높은 치수 안정성, 고온 저항성, 내식성, 우수한 인성, 쉬운 가공 및 기타 장점이 있습니다. 또 다른 긴 탄소 사슬 나일론 소재인 PA11과 비교할 때 PA12의 원료인 부타디엔 가격은 PA11의 원료인 피마자유 가격의 1/3에 불과합니다. PA11을 대체할 수 있으며 대부분의 장면에 적용할 수 있으며 자동차 연료 파이프, 에어 브레이크 호스, 해저 케이블, 3D 프린팅 및 기타 여러 분야에서 광범위한 응용 분야를 보유하고 있습니다.