批发特价乐泰4981瞬干胶 医用胶粘剂

</p> <p><span style="font-size: 14pt;">乐泰4981瞬干胶</span></p> <p><span style="font-size: 14pt;">医用胶粘剂</span></p> <p><span style="font-size: 14pt;"> </span></p> <p><span style="font-size: 14pt;">基本性能：</span></p> <p><span style="font-size: 14pt;">外观透明度/颜色：清澈</span></p> <p><span style="font-size: 14pt;">固化类型：湿气固化</span></p> <p><span style="font-size: 14pt;">适用基材：热塑性塑料，热固塑料，金属，弹性体，包括橡胶</span></p> <p><span style="font-size: 14pt;">粘度：500</span></p> <p><span style="font-size: 14pt;">适用范围：-53°C到104°C</span></p> <p> </p> <p>                                      <span style="font-size: 14pt;"> <span style="color: #ff0000;">更多产品详情，欢迎咨询深圳市鹏科泰贸易有限公司</span></span></p> <p><span style="font-size: 14pt;"><span style="color: #ff0000;">                                 电话：0755-86381816 </span></span><span style="color: #ff0000;"><span style="font-size: 14pt;">   </span></span></p> <p><span style="color: #ff0000;"><span style="font-size: 14pt;">                              </span><span style="font-size: 14pt;">传真：0755-86381822</span></span><span style="font-size: 14pt;"><span style="color: #ff0000;"> </span></span></p> <p><span style="font-size: 14pt;">PRODUCT DESCRIPTION<br />LOCTITE® Product 4981 is an ethyl cyanoacrylate adhesive<br />formulated to resist thermal cycling from -40°F to +250°F (-<br />40°C to 121°C). Maximum continuous temperature is 220°F.<br />Product 4981 exhibits better humidity resistance than standard<br />instant adhesives.<br />TYPICAL APPLICATIONS<br />Rapid bonding of a wide range of metal, plastic or elastomeric<br />materials. Particularly suitable for bonding plastic or rubber<br />parts. Loctite 4981 has USP Class VI Certification. Suitable for<br />use in assembly of disposable medical devices.<br />PROPERTIES OF UNCURED MATERIAL<br />Typical<br />Value Range<br />Chemical Type Ethyl cyanoacrylate<br />Appearance Water-White to Straw-<br />Coloured Liquid<br />Specific Gravity @ 25°C 1.1<br />Viscosity @ 25°C, mPa.s (cP)<br />Brookfield LVF<br />Spindle #2 @ 30 rpm 470 400 to 600<br />Flash Point (TCC), °C &gt;80<br />TYPICAL CURING PERFORMANCE<br />Under normal conditions, the surface moisture initiates the<br />hardening process. Although full functional strength is<br />developed in a relatively short time, curing continues for at<br />least 24 hours before full chemical/solvent resistance is<br />developed.</span></p> <p><span style="font-size: 14pt;">Cure speed vs. substrate<br />The rate of cure will depend on substrate used. The table<br />below shows the fixture time achieved on different materials at<br />22°C, 50% relative humidity. This is defined as the time to<br />develop a shear strength of 0.1 N/mm² (14.5 psi) tested on<br />specimens according to ASTM D1002.<br />Substrate Fixture Time, seconds<br />Steel (degreased) 20 to 30<br />Aluminium 2 to 10<br />ABS 5 to 10<br />Phenolic 10 to 20<br />Cure speed vs. bond gap<br />The rate of cure will depend on the bondline gap. High cure<br />speed is favoured by thin bond lines. Increasing the bond gap<br />will slow down the rate of cure.<br />Cure speed vs. accelerator<br />Where cure speed is unacceptably long due to large gaps,<br />applying accelerator to the surface will improve cure speed.<br />However, this can reduce the ultimate strength of the bond,<br />therefore testing is recommended to confirm acceptable<br />performance.</span></p> <p><span style="font-size: 14pt;">TYPICAL PROPERTIES OF CURED MATERIAL<br />Physical Properties<br />Coefficient of thermal expansion, ASTM D696, K-1 80x10-6<br />Coefficient of thermal conductivity, ASTM C177, W.m-1 K-1 0.1<br />Glass Transition temperature, ASTM E228, °C 120<br />Electrical Properties<br />Dielectric constant & loss, 25°C, ASTM D150:<br />Constant Loss<br />measured at 50Hz: 2.3 &lt;0.02<br />1kHz: 2.3 &lt;0.02<br />1mHz: 2.3 &lt;0.02<br />Volume resistivity, ASTM D257,W.cm: 1 x 1016<br />Dielectric strength, ASTM D149, kV/mm 25<br />PERFORMANCE OF CURED MATERIAL<br />(After 24 hr at 22°C) Typical<br />Value<br />Shear Strength, ASTM D1002, DIN 53283<br />Grit Blasted Steel, N/mm² 19<br />(psi) (2750)<br />Polycarbonate, N/mm² 10<br />(psi) (1500)<br />Phenolic, N/mm² 10<br />(psi) (1450)</span></p> <p><span style="font-size: 14pt;">GENERAL INFORMATION<br />This product is not recommended for use in pure oxygen<br />and/or oxygen rich systems and should not be selected as<br />a sealant for chlorine or other strong oxidising materials.</span></p> <p><span style="font-size: 14pt;">Approvals<br />Product 4981 has been granted USP Class VI certification<br />which makes it particularly suited for use in disposable medical<br />device assemblies.<br />Effects of Sterilisation<br />Products similar in composition to Loctite 4981 subjected to<br />standard sterilisation by E.T.O. or Gamma Radiation (2.5 and<br />5.0 Megarads) show excellent bond strength retention. It is<br />recommended that customers test specific parts after subjecting<br />them to preferred sterilisation method.</span></p> <p><span style="font-size: 14pt;">Directions for use<br />For best performance surfaces should be clean and free of<br />grease. This product performs best in thin bond gaps,<br />(0.05mm). Excess adhesive can be dissolved with Loctite clean<br />up solvents, nitromethane or acetone.<br />Storage<br />Products shall be ideally stored in a cool, dry location in<br />unopened containers at a temperature between 8° to 21°C<br />(46° to 70°F) unless otherwise labelled. Optimal storage<br />conditions of cyanoacrylate products are achieved with<br />refrigeration: 2° to 8°C (36° to 46°F). Refrigerated packages<br />shall be allowed to return to room temperature prior to use.</span></p> <p>