Gluing delrin?

Mdemon · 11th April 2007, 11:02

Does anyone know of any good adhesives that will glue delrin please? I'm sure someone mentioned it on here a while back but can't find it.

This will be belt-and-braces to some screws. Hoping it will seal and add strength.

TIA!

jmhardingjr · 11th April 2007, 14:15

The other trade name of Delrin is acetal homopolymer. As far as I know there are adhesives that will bond Delrin, but they tend to be expensive and the bond is only mechanical. See the excerpt from the Wikipedia article on Delrin below for details.

From Wikipedia:

"Bonding

Acetal polymers are typically very difficult to bond. Special processes and treatments have been developed to improve bonding of acetal. Typically these processes involve surface etching, flame treatment or mechanical abrasion. Typical etching processes involve chromic acid at elevated temperatures. Dupont has a patented process for treating acetal homopolymer called satinizing which creates anchor points on the surface which give that adhesive something to grab. There are also processes involving oxygen plasma and corona discharge[1].
Once the surface is prepared a number of adhesives can be used for bonding. These include epoxies, polyurethanes, and cyanoacrylates. Epoxies have shown 150-500 psi shear strength on mechanically abraded surfaces and 500-1000 psi on chemically treated surfaces (500psi approx 3,4MPa). Cyanoacrylates are useful for bonding to metal, leather, rubber and other plastics.
Solvent welding is typically unsuccessful on acetal polymers due to the excellent solvent resistance of acetal. Thermal welding through various methods have been used successfully on both homopolymer and copolymer."

Good luck,

Jay

**fireman** · 11th April 2007, 15:41

Also from my bible (Mcmaster Carr):
Epoxy for Difficult-to-Bond Plastics Use these two-part (resin and hardener) adhesives on polyethylene (UHMW, HDPE, and LDPE), nylon (all blends and glass filled), acetal (Delrin), PPS (polyphenylene sulfide, Ryton, Konduit), polypropylene, PBT (polybutylene terephthalate), PEEK, ABS, PVC, PET (Ertylite, Petlon, Petra, Mylar, Dacron polyester), ETFE, PVCF, PVDF (Kynar), ECTFE (Halar), fiberglass (FRP), polyimide materials (Ultem, Torlon, Imidex, Pyropel, Vespel, and Kapton), neoprene, EPDM, butyl rubber, urethane, glass, metal, and concrete. Mix ratio is 2:1. Begins to harden in 45 minutes; reaches full strength in 24 hours. The 1.7-oz. cartridge will cover approx. 3 sq. ft; the 1.5-qt. can will cover approx. 75 sq. ft. Color is amber. Temp. range is -40° to +350° F. To dispense the 1.7-oz. cartridges, use the applicator gun (sold separately). To mix the adhesive as you dispense, attach a mixer nozzle (sold separately). Full package is 12.
Epoxy adhesives (also known as Bondit B45TH) require minimal surface preparation. It's flexible and resists temperature extremes, chemicals, and impact. Encasing (potting) compound (also known as Bondit B45) is a thinner version of the epoxy. Use on all materials listed or use as a clear protective coating. It resists moisture and seawater and is an alternative to castable polyurethanes when encasing (potting) electrical cables, connectors, and transducer terminations.

Epoxy Adhesives

Encasing Compound
Size Each Each
1.7-oz. Cartridge7513A1 $54.627513A3 $63.801.5-qt. Can7513A2 208.73__________Applicator Gun74695A71 Each $24.23Mixer Nozzles74695A12 Each Partial Pkg.$1.00 Full Pkg.$0.75
Adhesives for Bonding PTFE

**Dave Sutton** · 12th April 2007, 00:55

It glues like shit.

Dave

DepthCharge · 12th April 2007, 23:40

Quote: (Originally Posted by Dave Sutton)

It glues like shit.

Dave

That is about the most succinct response you could ask for

, and the most accurate.

**Dave Sutton** · 13th April 2007, 00:10

Quote: (Originally Posted by DepthCharge)

That is about the most succinct response you could ask for

, and the most accurate.

Simple = Good

Dave

Mdemon · 13th April 2007, 07:57

Thanks all!

Brent (Divetheworld) has kindly offered to help me attach the bit, so the job will be done properly by a grown-up (no chewing gum or bailer twine this time). Rather than gluing, he suggested a gasket which will seal and give shock absorption. The screws should be enough to hold it on, so belt-and-braces not needed.

Many thanks for the suggestions!

PS Dave, here in the UK there is actually an adhesive product called "sticks like sh*t". I guess it does exactly what it says on the tin!

***Beanie*** · 13th April 2007, 08:28

Quote: (Originally Posted by Mdemon)

PS Dave, here in the UK there is actually an adhesive product called "sticks like sh*t". I guess it does exactly what it says on the tin!

he kideth not : Sticks Like Sh*t

I'm going to get some to stick my skirting to the walls

11th April 2007, 11:02	#1 (permalink)
Mdemon SiegeEngine II Current Rebreather/s: Inspiration Classic Home Build Other Rebreather/s: Inspiration Classic Home Build Join Date: Feb 2007 Location: SWUK Posts: 1,946	Gluing delrin? Does anyone know of any good adhesives that will glue delrin please? I'm sure someone mentioned it on here a while back but can't find it. This will be belt-and-braces to some screws. Hoping it will seal and add strength. TIA!
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11th April 2007, 14:15	#2 (permalink)
jmhardingjr Son of a Sailor Current Rebreather/s: Other CCR Home Build Other Rebreather/s: Other CCR Home Build Join Date: Sep 2005 Location: . . . this one particular harbor . . . Posts: 201	Re: Gluing delrin? The other trade name of Delrin is acetal homopolymer. As far as I know there are adhesives that will bond Delrin, but they tend to be expensive and the bond is only mechanical. See the excerpt from the Wikipedia article on Delrin below for details. From Wikipedia: "Bonding Acetal polymers are typically very difficult to bond. Special processes and treatments have been developed to improve bonding of acetal. Typically these processes involve surface etching, flame treatment or mechanical abrasion. Typical etching processes involve chromic acid at elevated temperatures. Dupont has a patented process for treating acetal homopolymer called satinizing which creates anchor points on the surface which give that adhesive something to grab. There are also processes involving oxygen plasma and corona discharge[1]. Once the surface is prepared a number of adhesives can be used for bonding. These include epoxies, polyurethanes, and cyanoacrylates. Epoxies have shown 150-500 psi shear strength on mechanically abraded surfaces and 500-1000 psi on chemically treated surfaces (500psi approx 3,4MPa). Cyanoacrylates are useful for bonding to metal, leather, rubber and other plastics. Solvent welding is typically unsuccessful on acetal polymers due to the excellent solvent resistance of acetal. Thermal welding through various methods have been used successfully on both homopolymer and copolymer." Good luck, Jay __________________ ". . . the sea's in my veins, my tradition remains, I'm just glad I don't live in a trailer . . ."
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11th April 2007, 15:41	#3 (permalink)
fireman rEvo combat swimmer Current Rebreather/s: rEvo Other CCR Other Rebreather/s: rEvo Other CCR Join Date: Nov 2006 Location: chicago Posts: 549	Re: Gluing delrin? Also from my bible (Mcmaster Carr): Epoxy for Difficult-to-Bond Plastics Use these two-part (resin and hardener) adhesives on polyethylene (UHMW, HDPE, and LDPE), nylon (all blends and glass filled), acetal (Delrin), PPS (polyphenylene sulfide, Ryton, Konduit), polypropylene, PBT (polybutylene terephthalate), PEEK, ABS, PVC, PET (Ertylite, Petlon, Petra, Mylar, Dacron polyester), ETFE, PVCF, PVDF (Kynar), ECTFE (Halar), fiberglass (FRP), polyimide materials (Ultem, Torlon, Imidex, Pyropel, Vespel, and Kapton), neoprene, EPDM, butyl rubber, urethane, glass, metal, and concrete. Mix ratio is 2:1. Begins to harden in 45 minutes; reaches full strength in 24 hours. The 1.7-oz. cartridge will cover approx. 3 sq. ft; the 1.5-qt. can will cover approx. 75 sq. ft. Color is amber. Temp. range is -40° to +350° F. To dispense the 1.7-oz. cartridges, use the applicator gun (sold separately). To mix the adhesive as you dispense, attach a mixer nozzle (sold separately). Full package is 12. Epoxy adhesives (also known as Bondit B45TH) require minimal surface preparation. It's flexible and resists temperature extremes, chemicals, and impact. Encasing (potting) compound (also known as Bondit B45) is a thinner version of the epoxy. Use on all materials listed or use as a clear protective coating. It resists moisture and seawater and is an alternative to castable polyurethanes when encasing (potting) electrical cables, connectors, and transducer terminations. Epoxy Adhesives Encasing Compound Size Each Each 1.7-oz. Cartridge7513A1 $54.627513A3 $63.801.5-qt. Can7513A2 208.73__________Applicator Gun74695A71 Each $24.23Mixer Nozzles74695A12 Each Partial Pkg.$1.00 Full Pkg.$0.75 Adhesives for Bonding PTFE __________________ Heres to you Capt. Bill Never Forget, and stay safe everyone.
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12th April 2007, 00:55	#4 (permalink)
Dave Sutton Diveshop of Horrors Current Rebreather/s: Sport Kiss MK 15.X rEvo Other CCR Azimuth Home Build Other Rebreather/s: Evolution Megalodon rEvo Other CCR Azimuth Home Build Join Date: Jun 2006 Location: Narragansett, Rhode Island and Hackettstown, New Jersey Posts: 2,907	Re: Gluing delrin? It glues like shit. Dave __________________ "Silent Diving with No Bubbles and No Politics".... www.nobubblediving.com
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12th April 2007, 23:40	#5 (permalink)
DepthCharge New Member Current Rebreather/s: Inspiration Classic Home Build Other Rebreather/s: Home Build Join Date: Mar 2005 Location: upstate NY Posts: 234	Re: Gluing delrin? Quote: (Originally Posted by Dave Sutton) It glues like shit. Dave That is about the most succinct response you could ask for, and the most accurate. __________________ Later, John It's better to beg forgiveness than ask permission
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13th April 2007, 00:10	#6 (permalink)
Dave Sutton Diveshop of Horrors Current Rebreather/s: Sport Kiss MK 15.X rEvo Other CCR Azimuth Home Build Other Rebreather/s: Evolution Megalodon rEvo Other CCR Azimuth Home Build Join Date: Jun 2006 Location: Narragansett, Rhode Island and Hackettstown, New Jersey Posts: 2,907	Re: Gluing delrin? Quote: (Originally Posted by DepthCharge) That is about the most succinct response you could ask for, and the most accurate. Simple = Good Dave __________________ "Silent Diving with No Bubbles and No Politics".... www.nobubblediving.com
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13th April 2007, 07:57	#7 (permalink)
Mdemon SiegeEngine II Current Rebreather/s: Inspiration Classic Home Build Other Rebreather/s: Inspiration Classic Home Build Join Date: Feb 2007 Location: SWUK Posts: 1,946	Re: Gluing delrin? Thanks all! Brent (Divetheworld) has kindly offered to help me attach the bit, so the job will be done properly by a grown-up (no chewing gum or bailer twine this time). Rather than gluing, he suggested a gasket which will seal and give shock absorption. The screws should be enough to hold it on, so belt-and-braces not needed. Many thanks for the suggestions! PS Dave, here in the UK there is actually an adhesive product called "sticks like sht". I guess it does exactly what it says on the tin! Last edited by Mdemon : 13th April 2007 at 08:10.*
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13th April 2007, 08:28	#8 (permalink)
*Beanie* Gallery Administrator Current Rebreather/s: Inspiration Classic Other Rebreather/s: Inspiration Vision Join Date: Jan 2005 Location: In da house! yeah baby! Posts: 3,311	Re: Gluing delrin? Quote: (Originally Posted by Mdemon) PS Dave, here in the UK there is actually an adhesive product called "sticks like sht". I guess it does exactly what it says on the tin! he kideth not : Sticks Like Sht I'm going to get some to stick my skirting to the walls __________________ Beanie Gallery Admin & Library Assistant. www.outlawdivers.org.uk www.beandiving.co.uk www.beanengineering.co.uk
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