polybutylenes

例句：

1. 1. The polybutylene plastics are widely used in packaging.
   聚丁烯塑料在包装领域广泛应用。
2. 2. The new polybutylene pipes are more durable than the old ones.
   新型聚丁烯管道比旧的更耐用。
3. 3. The polybutylene film is used for food packaging to prevent spoilage.
   聚丁烯薄膜用于食品包装，以防止变质。