I see that you have a blog that is hosted on a separate domain name. I would suggest to have the blog as an extension to your current website because if the blog is gathering links thanks to the useful articles and guides that you have been posting, the link juice should directly increase the authority of your primary domain.
Technical stuffs aside, you can also dive deeper into content marketing. First of all, nobody reads a blog filled with information about packaging. One or two article about packaging can be interesting but dedicating the whole blog for the topic? Not so much.
Look at your current customers, who are they? Are they manufacturers, small businesses or distributors? Once you have identified this, start brainstorming for content that will interest them. Could it be tips on how to improve production efficiency? Or maybe they want to know more about how they can improve their sales?
Consider placing a lead capture form on every prominent place corner of your blog. I'm sure you don't want your content marketing efforts go to waste.
Hope the above helps. Do let me know if you have more questions.