glue paper

 Best Glue Paper In 2020

Two component epoxies
Two component epoxies are about the same tensile strength as many structural acrylic adhesives. Added advantages of two component epoxies are that they adhere well to many more substrates and cure at room temperature. They do bond many plastics and specialty grades perform exceedingly well on composites. To de-bond, two component epoxies must be heated above 120°C to soften and parts should be pried apart while the adhesive is still hot. Tensile strength is approximately 20-30 N/mm² (2900-4400psi).

On all three types listed above, 1 and 2 component epoxies and acrylic structural adhesives, methylene chloride will have some effect but will work on the exposed edges of the bond slowly.

Cyanoacrylate adhesives
Cyanoacrylate adhesives, especially pure methyl grades like Permabond 910 and impact modified grades like Permabond 731 have exceptional strength on steel 30 N/mm² (4400psi). They do not have the same chemical and temperature resistance. The epoxy adhesives and acrylic adhesives both provide better impact resistance than cyanoacrylates. The upside is cyanoacrylate may be easier to remove. To de-bond from skin – warm soapy water with a slight rolling motion of the bonded area works well. Parts can be de-bonded in hot water or most polar solvents. Heat can also be used if the components can take it – to weaken a cyanoacrylate with heat, heat parts to 100 to 120°C.

Anaerobic adhesives and sealants are also ideal for metal (they are designed only for metal). Some might question why I didn’t list them first? They are strong, ideal for metal so in theory they could be listed higher – but for this article I’m talking about bonding. Although anaerobic adhesives do bond, they are generally used as threadlockers, retaining compounds, thread sealants and form in place gaskets. They come in a variety of strengths see (link to AA color blog) for how to debond.
That is a quick look at some of the best metal bonding adhesives. Contact Permabond for information on which product is best for your application.

UV Curable adhesives are again often desired for aesthetics and ideal process.  They have excellent adhesion to many plastics.  Keep in mind that many plastics are UV stabilized to prevent yellowing but plastic bonding UV adhesives often cure within the visible light range as well.  At least one of the plastics must be light transmitting.

Cyanoacrylates bond most plastics, a primer may be needed for bonding polyolefin and silicone but cyanoacrylates have very high shear strength on most plastics.  These instant adhesives offer quick process and good resistance to non polar solvents.  Resistance to impact and polar solvents is not as good as UV curables.

Structural acrylics, especially methyl methacrylates provide very high strength on plastics.  Substrate failure occurs on PPO, PVC, SMC, and HIPS.  Specialty products for individual plastics such as polyolefins are best matched with specialty adhesives for those plastics like Permabond TA4610 and TA4605 both polyolefin bonders.