How do you write a business blog? Simple—write about what you know. Whatever your industry there's lots of fascinating elements you can teach people about, that will get them associating you with educational value.
Well-researched blog posts not only boost your credibility as part of your content strategy, they also let you tap into the SEO keyword magic that powers the internet. Think about things people might google relevant to the problems you solve. Then write blog posts encapsulating those phrases.
This blog post for SPARK Product Development illustrates the different types of 3D printing they use and why—while also targeting associated keywords for people searching things like "3D printing for product development."