MTI hose

General Composites Discussions Products Talk
#321

The MTI hose limits the amount of air that goes through per unit of time. What you see when using it, is that once you turn on the pump, the membrane is pulled against the spiral that is in the MTI hose (at least then you know for sure you closed the end of the MTI hose) and the bag will evacuate slowly, much slower than when not using the MTI hose. It also depends on the length of hose, and part size.

A tip is to evacuate a lot of air using a vacuum cleaner, just before taping the last bit of bag. Especially with larger objects this is advisable.

#322

agreed but will you see 27" of vac just from the mti hose? didnt seem like it to me when I did my part. the vac was low until all the air was out and only started to climb when the bag was finally almost fully pulled down.

sometimes as men we cant see the forest for the trees, did somebody leave a clamp on the vac hose? :0 lol I kid.

#323

agreed but will you see 27" of vac just from the mti hose? didnt seem like it to me when I did my part. the vac was low until all the air was out and only started to climb when the bag was finally almost fully pulled down.

sometimes as men we cant see the forest for the trees, did somebody leave a clamp on the vac hose? :0 lol I kid.

#324

Thats possible if you have a short piece of MTI hose and a very strong pump with a high volume flow. Than your pump can pull this vacuum against the hose. And if you have this small piece it can be that even a small leak in you setup won’t allow you to pull down the bag because there can get more air in than out through the MTI hose.
Than bigger the piece of MTI hose than more air can be sucked out. We sometimes have these phenomen that people can not pull vacuum but it has always been a untight bag, most times it was the tacky tape that was not sealed enough.

#325

I see, makes sense. my pump is small so I will prob never see that issue. thanks for the explanation.

so a valve might help when using a big pump and small part to let the hose keep up.

#326

I have had that issue regularly, and it was always leaks in the sealant tape. Easy to solve, and logical.

Just re-check your sealant tape. Press all corners and other possible leak points (pleats) firmly.

Actually for the pump it is not bad. And for the quality of the product it is not bad either. At least the leaks are out before the resin goes in. (we all do a leak test, do we?)

#327

Distributor in China is ITS Composites you can find all other distributors on our homepage

#328

Sorry for the delay. It took a bit longer than expected but the MTI hose is now available in the U.S.A. and Canada through our new online shop and distribution center in Vero Beach, Florida, USA.

#329

Nice! me likey!:slight_smile:

#330

Awesome, I’ve been waiting for such a thing. Any chance you’ll offer the valve DD-Compound recently posted about?

#331

For the next 2.5 weeks I`m involved in a Momentive infusion project at JHM Technologies in Fenton, Michigan. If you have time to stop by you are cordially invited to see the MTI process in real live.

#332

just a little over a hour drive away… guess im gonna have to swing by. Thanks

#333

Hey All,

I just wanted to post my recent results with the MTI hose. I feel that I should preface this with my experience. I have some fiberglass experience, but only hand lay up type of work. I have never vacuum bagged anything or even turned a vacuum pump on before. I have never done wet bag lay ups. I am as close to complete NEWB as one could possibly get. With the use of this forum and the MTI hose, I was able to pull my first resin infused carbon fiber part. It was my first try and pretty close to perfect. I have a couple dry spots, but I believe I had blobs of spray tack that caused that. I want to say thank you to GAC and everyone on this forum. I cannot recommend this product enough! To be able to get a quality part on the first try says a ton about the MTI hose and its ease of use.

-Dont worry about those few little white spots that is dust from some sanding I was doing.-
](http://s937.photobucket.com/user/lespaul1234/media/sanding%20discs/IMG_1878_zps3eadcb94.jpg.html)[/IMG]

#334

Is it possible to get a sample of this, I’m in CA and would prefer a vendor on the West Coast. Thanks!

#335

People from the USA and Canada can easily order the MTI hose via the new online shop of German Advanced Composites. The companys headquarter, stock and distribution center is located in Florida, so shipping to CA doesnt take long. You can also ask your local supplier for MTI hose. The more people asking the faster we are able to establish a nationwide distribution network.

#336

Congrats on the shop. Very nice looking Magento theme. Well done.

#337

a month ago i send a pm to dominik about a sample of mti hose. he immediately send me one. yesterday i finally tried it out and i made some brake rotors air ducts for my bike, that was the first time i did infusion since until now every part i made was by wet layup/ vacuum bag. the whole process was exactly as described clean, easy and with a perfect end result

the pic is from a mobile phone but i think you can see that it hasn’t any defect

the only problem i have with this product is that i will have to make again all the molds i have because they don’t have the necessary flanges :cheesy:

i already have contact with dominik to buy more mti hose and one squeeze clamp because the vice plier i used this time didn’t do the work.

#338

After reading through this and some on this forum I feel a bit more ready to try infusion. Just not comfortable enough to jump in. I’m thinking about trying this product on some small stuff before I tackle the real project I have in my head

#339

The only problem I have with hpt textiles is there shipping rates to send 5 metres to uk nearly 26 uk pounds not worth buying at there rates,there is no uk supplier,this product is a time saving product well worth buying,just need a cheaper rate.

#340

I have used MTI hose on a motorcycle fairing mould that had no flanges, i laid in the fabric and peel ply then taped the hose around the perimeter and used an envelope bag. Great results every time but too expensive for me to use in the UK.
Regards Chris
www.carbonfibreworks.co.uk