Loctite 4031 Medical Device Instant Adhesive
Loctite 4031 Medical Device Instant Adhesive Clear 20g
- Viscosity Temperature : 77 °F
- Viscosity : 1375 mPa.s (cP) Brookfield
- Key Substrates : Metals , Plastics and Elastomers
- Color : Clear: Ultra Clear
- Curing Type : Humidity
- Application : Bonding
LOCTITE® 4031 is a transparent, colorless, low odor, low blooming, alkoxyethyl-based instant bonding adhesive that is particularly suitable for applications where vapor control is difficult. Typical applications for the product include the assembly of disposable medical devices. It can bond plastics, rubbers and metals and is certified to ISO 10993.
- Low odor for applications where vapor control is vital
- Low bloom for cosmetic applications
- Transparent and colorless
- Bonds plastics, rubbers and metals
- ISO 10993 certified
4031 has low odor and low blooming properties and
is particularly suitable for applications where vapor control is
difficult. Suitable for use in the assembly of disposable
4031 has been tested to Henkel's test protocols
based on ISO 10993 biocompatibility standards, as a means to
assist in the selection of products for use in the medical device
TYPICAL CURING PERFORMANCE
Under normal conditions, the atmospheric moisture initiates the
curing process. Although full functional strength is developed
in a relatively short time, curing continues for at least 24 hours
before full chemical/solvent resistance is developed.
Cure Speed vs. Substrate
The rate of cure will depend on the substrate used. The table
below shows the fixture time achieved on different materials
at 22 °C / 50 % relative humidity. This is defined as the time to
develop a shear strength of 0.1 N/mm².
Cure Speed vs. Bond Gap
The rate of cure will depend on the bondline gap. Thin bond
lines result in high cure speeds, increasing the bond gap will
decrease the rate of cure.
Cure Speed vs. Humidity
The rate of cure will depend on the ambient relative humidity.
The following graph shows the tensile strength developed with
time on Buna N rubber at different levels of humidity.
Cure Speed vs. Activator
Where cure speed is unacceptably long due to large gaps,
applying activator to the surface will improve cure speed.
However, this can reduce ultimate strength of the bond and
therefore testing is recommended to confirm effect.
Effects of Sterilization
In general, products similiar in composition to LOCTITE®
subjected to standard sterilization methods, such as EtO and
Gamma Radiation (25 to 50 kiloGrays cumulative) show
excellent bond strength retention. LOCTITE®
bond strength after 1 cycle of steam autoclave. It is
recommended that customers test specific parts after
subjecting them to the preferred sterilization method. Consult
for a product recommendation if your device will
see more than 3 sterilization cycles.
This product is not recommended for use in pure oxygen
and/or oxygen rich systems and should not be selected as
a sealant for chlorine or other strong oxidizing materials.
For safe handling information on this product, consult the
Safety Data Sheet (SDS).
Directions for use:
- For best performance bond surfaces should be clean and
free from grease.
- This product performs best in thin bond gaps (0.05 mm).
- Excess adhesive can be dissolved with Loctite cleanup
solvents, nitromethane or acetone
Loctite Material Specification
LMS dated January-29, 2003. Test reports for each batch are
available for the indicated properties. LMS test reports include
selected QC test parameters considered appropriate to
specifications for customer use. Additionally, comprehensive
controls are in place to assure product quality and
consistency. Special customer specification requirements may
be coordinated through Henkel Quality.
Store product in the unopened container in a dry location.
Storage information may be indicated on the product container
Optimal Storage: 8 °C to 21 °C. Storage below 8 °C or
greater than 28 °C can adversely affect product properties.
Material removed from containers may be contaminated during
use. Do not return product to the original container. Henkel
Corporation cannot assume responsibility for product which
has been contaminated or stored under conditions other than
those previously indicated. If additional information is required,
please contact your local Technical Service Center or
Customer Service Representative.
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