Top Reasons Why Your Laminator Is Not Sealing The Edges

In business, having the right tools can make a huge difference. The right equipment gets a job done faster and generally to a higher standard. It can even help your business to look its best. That’s why every business should invest in high-quality laminating equipment.

The Power Of Laminating Equipment

There are an array of different laminators on the market, including hot and cold versions. A hot laminator uses heat to seal two pieces of plastic together. The heat activates the glue built into the plastic sheets and ensures they bond.

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This seals the edges and gives you a document that looks good. More importantly, it is protected against the elements and dirt. You can use this type of laminator to create safety posters in the workplace, ID badges, and even signs that can survive in inclement weather. 

In contrast, the cold laminator simply uses pressure to bond the plastic sheets together. The principle is similar and it can provide the same quality finish. However, cold laminators tend to require slightly more physical effort, they don’t need a power supply, and they are less likely to make the ink run.

Of course, it’s frustrating when you’ve invested in a laminator and find it doesn’t seal the edges properly. In most cases, there is a simple explanation for this.

Wrong Position

If the paper is too close to one edge then there may not be enough plastic left to seal the two sheets together. This can happen because the document has been badly positioned n the plastic sheets or because the document is too large for the laminating sheets you’re using. 

Re-positioning the document may help. It can also be useful to use larger laminating sheets or shrink the document slightly. This will allow the edges to create a good seal.


Your machine may have a temperature control, allowing you to choose between hot and cold laminating. If you haven’t turned the temperature up to the top when heat laminating you may find the machine doesn’t get hot enough and your sheets don’t stick together properly at the edges. Try turning the temperature up. 

Laminating Too Soon

It is also possible that your laminator has not fully warmed up. In other words, you started laminating too soon. Because it laminates at high temperatures it can take a few minutes to warm up. If you use the machine before it is warmed up it won’t have the heat it needs to seal the edges properly. 

You need to know how long your laminator takes to warm up and wait for it to be ready. 

Poor-Quality Sheets

If the plastic laminating sheets you are using are old, have been stored in damp conditions, or are simply cheap versions, the adhesive may not be as good as it could be. This can make it difficult to bond the edges even if everything else is done perfectly. 

You can always try laminating with different sheets to see if this is the issue. 


TBN Editor

Time Business News Editor Team