{"id":2354,"date":"2020-12-07T11:46:59","date_gmt":"2020-12-07T10:46:59","guid":{"rendered":"https:\/\/bmp-srl.it\/?p=2354"},"modified":"2025-07-04T15:52:38","modified_gmt":"2025-07-04T13:52:38","slug":"bonding-temperature","status":"publish","type":"post","link":"https:\/\/bmp-srl.it\/en\/bonding-temperature\/","title":{"rendered":"Bonding failures ch. 4"},"content":{"rendered":"

In the previous episodes, we learned how to identify a surface, how to clean it, and, when necessary, how to apply a primer.<\/p>\n

Our substrate is now ready. It\u2019s time to focus on one of the most underestimated factors (perhaps the<\/em> most underestimated of all!) that causes many bonding problems: TEMPERATURE<\/strong>.<\/p>\n

<\/h3>\n

Chapter 4: TEMPERATURE<\/h2>\n

When talking about temperature, we must distinguish between storage temperature<\/strong>, application temperature<\/strong>, and temperature resistance<\/strong>.<\/p>\n

Storage temperature<\/strong> is the condition under which adhesive tapes and glues should be kept when not in use. There isn\u2019t a one-size-fits-all solution, which is why technical data sheets<\/strong> always specify the ideal temperature and humidity for each product.<\/p>\n

Poor storage can permanently compromise a product. For example, a two-component glue cartridge kept for a few days in a warehouse at 38\u00b0C becomes an excellent paperweight. Similarly, a resin-based double-sided tape will tend to soften and melt in summer or crystallize in winter\u2014both situations make it unusable. Finally, heat-activated tapes will cure prematurely in summer if not stored in refrigeration. The result? A beautiful roll of adhesive becomes a concrete pillar.<\/p>\n

Always consider the information on the product\u2019s technical data sheet, and don\u2019t hesitate to ask questions if anything is unclear.<\/p>\n

Application temperature<\/strong> is the temperature of the environment during bonding. In general, anything between 17\u00b0C and 25\u00b0C with 50% relative humidity is fine.
If the tape has been stored at 10\u00b0C, it may not be permanently damaged, but it will be temporarily unusable<\/strong>. Let it rest at room temperature for a few hours so it returns to full performance. The same goes for heat: if it’s summer and your warehouse hits 30\u00b0C (or higher), just keep the tape in a cooled room for a while\u2014it\u2019ll bounce back.<\/p>\n

The situation is very different with glues and heat-activated adhesives: if stored poorly<\/strong>, as mentioned above, they become unusable<\/strong> because the alteration process is NOT reversible.<\/p>\n

<\/h3>\n

How can you tell if poor storage has damaged your product?<\/h3>\n

Whether the damage is permanent or not, the symptoms of altered adhesives are generally the same. Let\u2019s list a few typical scenarios below.<\/p>\n

PROBLEM<\/strong>: The glue won\u2019t come out of the tube\/nozzle\/extruder.
CAUSE<\/strong>: The tube is either empty or the glue has cured.
SOLUTION<\/strong>: Throw it away. Also discard all other tubes stored in the same conditions or those that have expired.<\/p>\n

PROBLEM<\/strong>: The double-sided tape feels like a plastic film and doesn\u2019t stick when touched.
CAUSE<\/strong>: It was stored at too low a temperature.
SOLUTION<\/strong>: Try warming it up (at 21\u00b0C\u2014NOT in the oven<\/strong>) for a few hours. If it revives, you can use it. If not, it\u2019s permanently damaged. Discard it.<\/p>\n

PROBLEM<\/strong>: The double-sided tape feels too sticky, like premium acacia honey. The liner is messy and the adhesive mass seems to be dripping.
CAUSE<\/strong>: It was stored at too high a temperature.
SOLUTION<\/strong>: Cool it down. If you don\u2019t have a fridge, try a room with air conditioning. It might take time, but it should recover. If it doesn\u2019t\u2014or if you can\u2019t cool it\u2014consider switching to a product that can withstand your working conditions.<\/p>\n

PROBLEM<\/strong>: The liner (silicone paper) is wrinkled.
CAUSE<\/strong>: Too much humidity. Your tape is deteriorating, and the liner wrinkles are a clear sign.
SOLUTION<\/strong>: If you can’t reduce humidity in your facility, use a tape with poly-coated liner<\/strong>, a special type of paper that blocks moisture and protects the adhesive.
(Unfortunately, we can\u2019t help with your rheumatism.)<\/p>\n

<\/h3>\n

Temperature resistance<\/h3>\n

This is the product’s resistance from application to the end of its service life. Generally, tapes have a resistance range between -40\u00b0C and +100\u00b0C (continuous), with even higher peaks possible. Some double-sided tapes can handle up to 200\u00b0C continuously.<\/a><\/strong> The only mistake you must NOT make is confusing temperature resistance<\/strong> with storage temperature<\/strong>\u2014technical sheets always make this distinction clear. No excuses!<\/p>\n

For glues<\/strong>, special attention is needed: for some, temperature or relative humidity can accelerate or delay<\/strong> curing. This affects the open time (the time between glue application and bonding) and the handling time. Always take this into account.<\/p>\n

In some cases, this can be an advantage: technical data sheets may even recommend using an oven as a curing accelerator<\/strong>, when possible.<\/p>\n

Watch out for moisture-curing adhesives<\/strong>: if humidity is high, the glue cures instantly.
Cyanoacrylate is a prime example\u2014it loves sticking to moist fingers instead of the parts you’re actually trying to fix.<\/p>\n

As always, if anything in the technical sheet is unclear, ask your trusted technician.<\/p>\n

Stay tuned for the next episode<\/a> of \u201cBonding Failures\u201d<\/strong>, dedicated to pressure<\/strong>.<\/p>\n

BMP Team<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"

In the previous episodes, we learned how to identify a surface, how to clean it, and, when necessary, how to apply a primer. Our substrate is now ready. It\u2019s time to focus on one of the most underestimated factors (perhaps the most underestimated of all!) that causes many bonding problems: TEMPERATURE. Chapter 4: TEMPERATURE WhenContinue reading “Bonding failures ch. 4”<\/span><\/a><\/p>\n","protected":false},"author":4,"featured_media":2356,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-2354","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-non-categorizzato"],"yoast_head":"\nBonding Temperature: Key Factors to Avoid Adhesive Failures | BM<\/title>\n<meta name=\"description\" content=\"Learn how bonding temperature affects adhesive performance, from storage to application and heat resistance. 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