Tech-Bond Solutions
"When performance is a must!"
Received three days before Christmas
Good Morning and Happy Holidays
My firm in engaged in the manufacture of molded cable assemblies. Typically we are molding a neoprene jacketed cable terminated to a connector with a special metal mold adapter ring and we must encapsulate or over mold these components with a two component polyurethane, specifically we use a product from XXXXXXX and another from XXXXXX While these firms provide primer,s they are proving to be unreliable as our customers seek higher and higher levels of performance and bond life.
... whereas the initial process I describe above we see aging failures, stress failures and clean bond line failures right out of the mold.
I would greatly appreciate your technical expertise and product assistance.
Respectfully,
XXXX, VP
XXXXX
Tech-Bond's reply, two hours later.
XXXX,
Your solution for bonding the polyurethane is, in essence, a mechanical solution, i.e., your primer and adhesive formula is based on stickiness and when the stickiness expires so does the bond. We see this result often.
Tech-Bond offers a chemical/molecular solution. Normally, when dealing with polymers such as your polyurethane, the poly needs primed with an adhesion promoter. Once sprayed (or brushed) with an adhesion promoter, poly's are easily bonded by using a structural adhesive such as our SI products.
We have had clients who have experienced success in injection molding environments who have used just our SI product (no primer) to create a bond, specifically with polypropylene to a wood substrate. Polyurethane should have the same characteristics as polypropylene and the other substrate doesn't matter. All substrates, other than polymers and glass, bond easily with our SI product.
Tech-Bond also has a new product, BP Blue, that should work even if our SI product. does not BP Blue has an adhesion promoter for polymers built into its formula. BP Blue has passed all performance tests and early feedback from clients has been 100% positive.
I've included the MSDS's and the Technical Data sheets with this reply. The client using an SI product in and injection molding process is using SI Black. Black and Blue simply refer to the viscosity rating and reflect the color of print on the label.
Please let me know if you have further questions.
Don Meyers
Tech-Bond Solutions
www.tech-bond.net
877 565 7225
Fax: 866 411 0032
XXX's response 30 minutes after Tech-Bond's reply.
Don,
That is a very thorough explanation, Thanks. In my particular situation rubber and metals are the substrate and the poly is applied as a mixed liquid. The mechanics you explained make sense as we find our cables molded in molds with compressive shutoffs always bond better. Our technicians have told us this for a long time, only recently have we realized why.
Sounds like I will be trying some of your SI and BP Blue. Are there samples kits available for sale?
XXX
Note: People often fall in love with the "sticky" solution, often to their own undoing. Please see Case Study N0. 2.
To purchase the materials needed to glue the poly-plastics, nylon, UHMWPE's, polycarbonates, etc. click on the following link:
http://www.shop.tech-bond.net/product.sc?productId=25&categoryId=11
A narrative
Tech-Bond was contacted by a manufacturer of a home improvement product, a product that was, in fact, a better mousetrap ... and needed. To use properly, this unique product required gluing polypropylene to polypropylene. Representatives of this company contacted a number of glue companies.
Every glue company told them that there glue wouldn't glue polypropylene. That is, every company, but one. This manufacturer ordered a sample of this wonderful glue. End result. The wonderful didn't work.
Finally, Tech-Bond was contacted. A sample of the Tech-Bond system, Poly Prep and SI adhesive, was sent ... and it worked. End of story? Not quite.
We always give detailed instructions and because of this unique products location, we recommending roughing the surface. Which the manufacturer did. Then they wanted the bond to be faster, so we recommended the accelerator.
But the company went back to the wonderful glue and roughed the surface and used the accelerator and it kind of stuck together. Then the executives took a vote and decided that they wanted to go with the two step system of glue and accelerator and not have the third step of the Poly Prep to prime the polypropylene.
The engineer was told that all the joins would come apart. Two months later, the pieces started coming apart. It is important to note that price wasn't a consideration in the vote. Tech-Bond's price for the solution that work was even better than the solution voted on ... which did not work. TRUE STORY.
If you have questions on how Tech-Bond will work for you, please call 877 565 7225.
To purchase the materials needed to glue the poly-plastics, nylon, UHMWPE's, polycarbonates, etc. click on the following link:
http://www.shop.tech-bond.net/product.sc?productId=25&categoryId=11
Case study # 3
The limits of Tech-Bond's technology are described below. It was a request for information from the website. Tech-Bond always works, but will it do what you need. If there is a question about if Tech-Bond will work on your application, go to the contact us section of this site, or just call us 877 565 7225.
You have received a contact request from a visitor to your storefront at http://shop.TECH-BOND.NET:
E-mail Address: abc@def.com
First Name: Robert
Last Name: xxxxxx
Company:
Phone Number: xxxxxxxx
Request:
I have a Tonka toy with a broken loader bucket. Can it be repaired?
This request was received the day after Christmas. Somewhere there was an unhappy boy ... or girl. Our reply was within hours.
Robert's reply:
Thanks.
Robert didn't order. I believe that we saved Robert some money.
To purchase the materials needed to glue the poly-plastics, nylon, UHMWPE's, polycarbonates, etc. click on the following link:
http://www.shop.tech-bond.net/product.sc?productId=25&categoryId=11
Using Tech-Bond’s Poly Prep(PP)
The procedure varies based on whether, the materials to be bonded are the result of a fresh break, or if one or more of the substrates are virgin polymers. Polymer bonds must be smooth surface to smooth surface for strength. If there are uneven surfaces, or any gaps, the strength of the bond is significantly reduced.
Recently broken polymers
With fresh breaks, (by definition the polymers are broken) lightly rough the two surfaces with steel wool, emery cloth or fine grit sand paper. After roughing proceed to number 1 below.
Flexible Polymers
Polyester and flexible nylon bond rather easily. Flexible surfaces do not need to be roughed. The critical component of flexible bonds is to prevent a "peel" from starting. Once a peel starts, it can't be stopped. To prevent a peel, make sure the Bonding Agent reaches all the way to the edge of the bond.
Virgin Polymers
When working with virgin polymers where the strength is the bond is critical, aggressively rough the surface(s) that need to be bonded with medium or coarse grit sand paper. After roughing proceed to number 1 below.
1) Spray the polymer surface to be bonded with PP, both surfaces if polymer to polymer, let dry.
2) Let the treated surface cure for five minutes.
3) If polymer is a silicone, UHMW, Delrin®, or Teflon®, repeat steps 1) and 2)
4) Apply Bonding Agent thoroughly over one or both surfaces, press together. If necessary, spray the seam with Activator/Accelerator.
5) Let bond cure for 24 hours without stress.
Done
If you have further questions, please call 877 565 7225 or 614 327 8884 for technical support.
