| 品牌 |
乐泰 |
型号 |
4980 |
| 产品名称 |
瞬间胶 |
硬化/固化方式 |
湿固化胶粘剂 |
| 主要粘料类型 |
合成弹性体 |
基材 |
透明无机材料 |
| 物理形态 |
溶液型 |
性能特点 |
快速固化 |
| 产地 |
中国 |
厂家 |
汉高股份有限公司 |
| 粘合材料类型:塑料类,橡胶类,金属类,其他 | 树脂胶的分类:丙烯酸酯胶 |
| 热熔胶类型:胶合板热熔胶 | 剪切强度:3000（mpa） |
| 有效物质≥:90（％） | 活性使用期:5（min） |
| 工作温度:75（℃） | 保质期:24（个月） |
| 执行标准:coc | cas:sgs |
| 典型黏度:500（cps） | 完全固化时间:24（h） |
乐泰4981瞬干胶
医用胶粘剂
基本性能：
外观透明度/颜色：清澈
固化类型：湿气固化
适用基材：热塑性塑料，热固塑料，金属，弹性体，包括橡胶
粘度：500
适用范围：-53°c到104°c
product deion
loctite® product 4981 is an ethyl cyanoacrylate adhesive
formulated to resist thermal cycling from -40°f to +250°f (-
40°c to 121°c). maximum continuous temperature is 220°f.
product 4981 exhibits better humidity resistance than standard
instant adhesives.
typical applications
rapid bonding of a wide range of metal, plastic or elastomeric
materials. particularly suitable for bonding plastic or rubber
parts. loctite 4981 has usp class vi certification. suitable for
use in assembly of disposable medical devices.
properties of uncured material
typical
value range
chemical type ethyl cyanoacrylate
appearance water-white to straw-
coloured liquid
specific gravity @ 25°c 1.1
viscosity @ 25°c, mpa.s (cp)
brookfield lvf
spindle #2 @ 30 rpm 470 400 to 600
flash point (tcc), °c >80
typical curing performance
under normal conditions, the surface moisture initiates the
hardening 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 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 (14.5 psi) tested on
specimens according to astm 1002.
substrate fixture time, seconds
steel (degreased) 20 to 30
aluminium 2 to 10
abs 5 to 10
phenolic 10 to 20
cure speed vs. bond gap
the rate of cure will depend on the bondline gap. high cure
speed is favoured by thin bond lines. increasing the bond gap
will slow down the rate of cure.
cure speed vs. accelerator
where cure speed is unacceptably long due to large gaps,
applying accelerator to the surface will improve cure speed.
however, this can reduce the ultimate strength of the bond,
therefore testing is recommended to confirm acceptable
performance.
typical properties of cured material
physical properties
coefficient of thermal expansion, astm 696, k-1 80x10-6
coefficient of thermal conductivity, astm c177, w.m-1 k-1 0.1
glass transition temperature, astm e228, °c 120
electrical properties
dielectric constant & loss, 25°c, astm 150:
constant loss
measured at 50hz: 2.3 <0.02
1khz: 2.3 <0.02
1mhz: 2.3 <0.02
volume resistivity, astm 257,w.cm: 1 x 1016
dielectric strength, astm 149, kv/mm 25
performance of cured material
(after 24 hr at 22°c) typical
value
shear strength, astm 1002, din 53283
grit blasted steel, n/mm2 19
(psi) (2750)
polycarbonate, n/mm2 10
(psi) (1500)
phenolic, n/mm2 10
(psi) (1450)
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 4981 has been granted usp class vi certification
which makes it particularly suited for use in disposable medical
device assemblies.
effects of sterilisation
products similar in composition to loctite 4981 subjected to
standard sterilisation by e.t.o. or gamma radiation (2.5 and
5.0 megarads) show excellent bond strength retention. it is
recommended that customers test specific parts after subjecting
them to preferred sterilisation method.
directions for use
for best performance surfaces should be clean and free of
grease. this product performs best in thin bond gaps,
(0.05mm). excess adhesive can be dissolved with loctite clean
up solvents, nitromethane or acetone.
storage
products shall be ideally stored in a cool, dry location in
unopened containers at a temperature between 8° to 21°c
(46° to 70°f) unless otherwise labelled. optimal storage
conditions of cyanoacrylate products are achieved with
refrigeration: 2° to 8°c (36° to 46°f). refrigerated packages
shall be allowed to return to room temperature prior to use.
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