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樂泰3211

產品簡介
樂泰產品3211 是一種單組分，觸性膠粘劑，該產品暴露于足夠強度的紫外線和/或可見光下就會快速固化形成柔韌透明的膠層。
典型用途
樂泰產品 3211 主要是為聚碳酸酯基材之間彼此粘接而設計的，并且在典型的模壓應力水平下還不會產生應力開裂。它的柔韌特性提高了粘接面承受載荷的能力，改善了減震特性。另外本產品對大多數基材都表現出良好的粘接特性，包括玻璃，許多塑料和大多數金屬。樂泰 3211 已經通過了 USP VI級認證。適用在一次性醫用設備組裝件上。

消毒的影響
與樂泰產品 3211 成分相似產品經過 E.T.O 或g輻射( 2.5 和 5.0 兆拉德 ) ，結果顯示均具有優異的粘接強度保有率。 泰產品 3211 在121-127°F 蒸汽處理30分鐘，1 個循環，結果顯示具有優異的粘接強度保有率。這些產品不建議反復進行高壓蒸消毒。

PRODUCT DESCRIPTION
LOCTITE® Product 3211 is a one component, thixotropic
adhesive which cures rapidly to form flexible, transparent
bonds when exposed to ultraviolet radiation and/or visible light
of sufficient intensity.
TYPICAL APPLICATIONS
Loctite Product 3211 is primarily designed for bonding
polycarbonate to itself, while not inducing stress cracking
under typical moulded in stress levels. Its flexibility enhances
the load bearing and shock absorbing characteristics of the
bond area. It has also shown excellent adhesion to a wide
variety of substrates including glass, many plastics and most
metals. Loctite 3211 has USP Class VI Certification. Suitable
for use in assembly of disposable medical devices.
PROPERTIES OF UNCURED MATERIAL
Typical
Value Range
Chemical Type Acrylated Urethane
Appearance Pale, yellow liquid
Specific Gravity @ 25°C 1.13
Viscosity @ 25°C, mPa.s (cP)
Brookfield RVTD
Spindle 4 @ 20 rpm 11,500 8,000 to 15,000
Refractive index, ND 1.48
Flash Point (TCC), °C 80

Stress Cracking
Liquid adhesive was applied to a medical grade polycarbonate
bar 6.4cm by 13mm by 3mm which had been flexed to induce
different stress levels. The time it took for signs of crazing or
stress cracking to appear was recorded.
Stress Cracking, ASTM D3929 17 N/ mm2 >15 minutes
(2500 psi)
TYPICAL CURING PERFORMANCE
This product can be cured by irradiation with ultraviolet and/or
visible light of sufficient intensity. To obtain full cure on
surfaces exposed to air, the intensity of UV radiation at 220 to
260 nm will accelerate the tack free cure of surface. The cure
rate and ultimate depth of cure will depend on light intensity,
the spectral distribution of the light source, the exposure time
and the light transmittance of the substrates.
NOTE: UV intensities where quoted are measured at
365nm using an OAI 306 UV Powermeter.

Depth of Cure vs. UV Irradiance
The graphs below show the increase in depth of cure with time
at 30 mW/cm2 - 100 mW/cm2 as measured from the thickness
of the cured pellet formed in a 15mm diameter PTFE die.
When exposed to a V Bulb at irradiances of 50 and 100
mW/cm2 for 30 seconds, a depth of cure greater than 13 mm
was achieved. The performance for Medium Pressure Hg will
be similar to Fusion H Bulb.

Hardness (Shore D): 51
Water absorption, ASTM D570, 2hrs in boiling water, % 2.72
Refractive index, ND 1.50
Electrical Properties Constant Loss
Dielectric constant & loss, ASTM D150 @ 100 Hz 5.697 0.0426
@ 1 kHz 5.605 0.0188
@ 1 MHz 5.131 0.0419
Volume resistivity, ASTM D149, W.cm 8.9 x 1014
Surface resistivity, ASTM D149, W 8.7 x 1014
Dielectric strength, ASTM D257, kV/mm 24
PERFORMANCE OF CURED MATERIAL
Shear strength in tensile mode tested in accordance with
ASTM D3163 on polycarbonate with a 0.5mm gap. Lap shear
assemblies were cured for 80 seconds @ 30mW/cm2 using a
metal halide light source.
Initial Strength, N/mm2 11
(psi) (1600)
TYPICAL ENVIRONMENTAL RESISTANCE
Test Procedure: ASTM D3163
Substrate: Polycarbonate with 0.5mm gap
Cure Procedure: 80 secs @ 30mW/cm2 Metal Halide
Solvent Temp. % of initial strength retained at
2hrs 24hrs 170hrs
Boiling Water 70
Water Immersion 49°C 60
Isopropanol immersion RT 95
Humidity Resistance 38°C 75

Heat Ageing on polycarbonate substrates
Temp. 170hrs 340hrs
Bonded polycarbonate 71°C 1001 1001
Bonded polycarbonate 93°C 1001 1001
Bonded polycarbonate 121°C 751 601
1Substrate failure
Effects of Sterilisation
Products similar in composition to Loctite 3211 subjected to
standard sterilisation by E.T.O. or Gamma Radiation (2.5 and
5.0 Megarads) show excellent bond strength retention. Loctite
3211 has shown excellent bond strength retention following
exposure to 121 - 127°C steam for 30 minutes, 1 cycle.
Repeated autoclaving is not recommended with these
adhesives. It is recommended that customers test specific
parts after subjecting them to preferred sterilisation method.
GENERAL INFORMATION
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 oxidising materials.

Approvals
Product 3211 has been granted USP Class VI certification
which makes it particularly suited for use in disposable
medical device assemblies.
Directions for use
This product is UV sensitive. Exposure to daylight, UV light
and artificial lighting should be kept to a minimum during
storage and handling. Product should be dispensed from
applicators with black feed lines. For best performance bond
surfaces should be clean and free from grease. UV cure rate
is dependent on lamp intensity, distance from light source,
depth of cure needed or bondline gap and light transmittance
of the substrate through which the radiation must pass.
Recommended intensity for cure in bondline situation is 5
mW/cm2 minimum (measured at the bondline) with an
exposure time of 4-5 times the fixture time at this same
intensity. For dry curing of exposed surfaces higher intensity
UV is required (100 mW/cm2 minimum). Cooling should be
provided for temperature sensitive substrates such as
thermoplastics. Crystalline and semi-crystalline
thermoplastics should be checked for risk of stress cracking
when exposed to liquid adhesive. Excess adhesive can be
wiped away with organic solvent. Bonds should be allowed to
cool before subjecting to any service loads.
Storage
Product shall be ideally stored in a cool, dry location in
unopened containers at a temperature between 8°C to 28°C
(46°F to 82°F) unless otherwise labelled. Optimal storage is
at the lower half of this temperature range. To prevent
contamination of unused product, do not return any material to
its original container.

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