{"id":4226,"date":"2024-01-31T01:22:51","date_gmt":"2024-01-30T16:22:51","guid":{"rendered":"https:\/\/jwhitech.com\/car%c2%b7pcb_jw\/"},"modified":"2024-02-20T22:30:31","modified_gmt":"2024-02-20T13:30:31","slug":"car%c2%b7pcb","status":"publish","type":"page","link":"https:\/\/jwhitech.com\/en\/car%c2%b7pcb\/","title":{"rendered":"Car\u00b7PCB"},"content":{"rendered":"

CAR\u00b7PCB<\/p><\/h2><\/div>

Viscosity management of automotive and PCB production adhesive<\/strong><\/span> and sealant formulations<\/p>\n<\/div>

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New high-strength industrial adhesives are currently being used in automotive and other manufacturing operations to replace spot welding, mechanical fasteners and other traditional joining methods. Adhesives offer several key advantages over traditional fastening technologies, including more uniform bond strength over a larger surface area compared to the localized strength typically achieved with mechanical fastening.<\/p>\n

Adhesives and sealants are also used to join substrates or seal joints or gaps. They come in a variety of forms, but are usually dispersions containing polymeric materials or hardeners, surfactants and solvents. In the case of reactive adhesives, adhesion can be induced by mixing two or more reactive ingredients such as epoxy resin and hardener, or by external stimuli such as ultraviolet rays, heat, and moisture. In the case of non-reactive adhesives, adhesion is induced by a physical stimulus, for example pressure or solvent evaporation.<\/p>\n

Most adhesives and sealants are composed of polymeric materials or contain monomers or oligomers that react to form cross-linked polymer networks. As a result, the molecular weight and molecular structure of these components are very important for the material properties before and after bonding. Many adhesive and sealant formulations are two-phase systems containing emulsions containing dispersed polymers or, in the case of caulk, dispersed solids. In both cases, particle size and droplet size can be critical to product performance.\nThe adhesive or sealant must flow to the substrate surface and then change from a flowable liquid to a structural solid without creating harmful internal stresses in the joint. Many adhesive or sealant problems that occur are not due to poor material selection or joint design, but are often directly related to poor production techniques lacking proper process control.<\/p>\n\n<\/div>

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< <\/strong><\/span> Why measuring viscosity is important > <\/strong><\/span><\/p><\/h1><\/div>\n\n\n\n\n\n\n
Viscosity (and rheology) is the most important parameter in adhesive production and processing<\/td>\nVarious solvents, soluble agents, resin powders or inert fillers control the viscosity of the adhesive<\/td>\nThe viscosity of adhesive systems increases or decreases depending on application and operating environment<\/td>\n<\/tr>\n<\/thead>\n
It is highly desirable that the viscosity is automatically adjusted to a substantially constant value<\/td>\nEssential to improve performance and reduce costs in virtually all formulation and delivery processes<\/td>\nRecognize the need for a viscometer to monitor viscosity and temperature<\/td>\n<\/tr>\n
Ensure consistency using temperature-compensated viscosity as key process variable<\/td>\nFailures can be reduced<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
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< <\/strong><\/span> Why viscosity monitoring and control is important in adhesive and
\nsealant formulation, testing and delivery > <\/strong><\/span><\/p><\/h1><\/div>\n\n\n\n
\n\n\n\n
<\/td>\nAdhesion and sealing quality<\/u><\/strong>
\nJoined parts must conform to finished product specifications, and process control is critical to achieving this.
\nIn-line viscosity monitoring and control can help achieve the consistency needed in delivery and formulation systems adhesive and sealant applications.<\/td>\n<\/tr>\n<\/thead>\n<\/table>\n<\/td>\n		\n\n\n\n\n
<\/td>\nDefect Reduction<\/u><\/strong>
\nViscosity control helps mitigate mistakes (air entrapment, moisture build-up) that occur during the preparation, testing and delivery of adhesives and sealants.<\/td>\n<\/tr>\n<\/thead>\n<\/table>\n<\/td>\n<\/tr>\n
\n\n\n\n
<\/td>\nBetter yield<\/u><\/strong>
\nEnsuring consistency throughout the coating process significantly reduces scrap rates, saving money and time, and supporting continuous processes.<\/td>\n<\/tr>\n<\/thead>\n<\/table>\n<\/td>\n		\n\n\n\n\n
<\/td>\nCorrect Attribute<\/u><\/strong>
\nPoor mix quality can have a negative impact on the desirable properties of the joint, such as resistance to thermal cycling, chemical resistance, electrical insulation, flexibility, dimensional stability, and low shrinkage.
\nAll of these properties depend on how well the process is controlled, so controlling viscosity is important.<\/td>\n<\/tr>\n<\/thead>\n<\/table>\n<\/td>\n<\/tr>\n
\n\n\n\n
<\/td>\nCost<\/u><\/strong>
\nIncorrect viscosity harms more than just quality.
\nPoor viscosity control increases the use of thickeners, fillers and diluents. Continuous viscosity measurement during the mixing process can ensure homogeneity, optimize energy use and reduce diluent use.<\/td>\n<\/tr>\n<\/thead>\n<\/table>\n<\/td>\n		\n\n\n\n
<\/td>\nEfficiency<\/u><\/strong>
\nEliminating the need for manual viscosity control saves operators time and allows them to focus on other tasks.<\/td>\n<\/tr>\n<\/thead>\n<\/table>\n<\/td>\n<\/tr>\n<\/thead>\n<\/table>\n
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Jinwoo Hi-Tech\u2019s inline solution<\/strong><\/span> for the automobile and PCB industries<\/p><\/h1><\/div><\/div><\/div>

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Brookfield TT-100<\/strong><\/td>\n<\/tr>\n
<\/p>\n\n\n\n\n
nline rotational viscometer<\/strong><\/td>\n<\/tr>\n
\u25b6 Viscosity: 10~500,000 cP
\n\u25b6 Shear Rate: 10~1,000 sec-1
\n\u25b6 Repeatability: \u00b10.5% of span
\n\u25b6 Pressure Range: 200 psig
\n\u25b6 Max Flow Rate: 5 m3\/h
\n\u25b6 Output Signal: 4-20mA<\/td>\n<\/tr>\n<\/thead>\n<\/table>\n<\/td>\n<\/tr>\n<\/thead>\n<\/table>\n<\/div><\/div>
\n\n\n\n\n
Rheonics SRV, SRD<\/strong><\/td>\n<\/tr>\n
<\/p>\n\n\n\n\n
In-line vibrating viscosity and density meter<\/strong><\/td>\n<\/tr>\n
\u25b6 Viscosity: 0.5~50,000 cP
\n\u25b6 Accuracy: 1% of reading
\n\u25b6 Repeatability: 1%
\n\u25b6 Density: 0.4~4.0 g\/cc
\n\u25b6 Accuracy: 0.001 g\/cc
\n\u25b6 Repeatability: 1%
\n\u25b6 Analog & Digital output<\/td>\n<\/tr>\n<\/thead>\n<\/table>\n<\/td>\n<\/tr>\n<\/thead>\n<\/table>\n<\/div><\/div>
\n\n\n\n\n
Brookfield TT-100<\/strong><\/td>\n<\/tr>\n
<\/p>\n\n\n\n\n
Inline ultrasonic flow meter<\/strong><\/td>\n<\/tr>\n
\u25b6 Flow range: 0.01~25 m\/s
\n\u25b6 Accuracy: \u00b11.0% (\u00b10.3%)
\n\u25b6 Repeatability: 0.15%
\n\u25b6 Pipe Size: 6~6,500 mm
\n\u25b6 Temp range: -40~240 \u2103
\n\u25b6 Analog & Digital output<\/td>\n<\/tr>\n<\/thead>\n<\/table>\n<\/td>\n<\/tr>\n<\/thead>\n<\/table>\n<\/div><\/div><\/div><\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":4,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"100-width.php","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"class_list":["post-4226","page","type-page","status-publish","hentry"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/jwhitech.com\/en\/wp-json\/wp\/v2\/pages\/4226","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/jwhitech.com\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/jwhitech.com\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/jwhitech.com\/en\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/jwhitech.com\/en\/wp-json\/wp\/v2\/comments?post=4226"}],"version-history":[{"count":8,"href":"https:\/\/jwhitech.com\/en\/wp-json\/wp\/v2\/pages\/4226\/revisions"}],"predecessor-version":[{"id":4277,"href":"https:\/\/jwhitech.com\/en\/wp-json\/wp\/v2\/pages\/4226\/revisions\/4277"}],"wp:attachment":[{"href":"https:\/\/jwhitech.com\/en\/wp-json\/wp\/v2\/media?parent=4226"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}