High efficiency filter glue is a two-component polyurethane adhesive. After curing It is mainly milky white and is used as a bonding seal between high-efficiency filter non-woven fabrics and outer frames such as aluminum plates, galvanized plates, and plastic plates. High-quality high-efficiency filter glue has good fluidity, strong adhesion, high hardness, and no irritating smell. So do you know what some special terms about high-efficiency filter glue mean? The author will introduce it to you.
Appearance: the external appearance of things and their people impression.
viscosity ：When a liquid flows, increments are produced between its molecules The property of friction is called the viscosity of the liquid.
The viscosity is expressed by viscosity, which is used to characterize the resistance factor related to the properties of the liquid. Viscosity is the basic characteristic of potting materials,The initial viscosity measured when the A/B components are mixed evenly is the initial viscosity. Determines the potting conditions. The unit of dynamic viscosity is mPa.s, the lower the value , oneThe better the general flow performance. According to the definition, the viscosity of water is 1mPa.s, The viscosity of engine oil is about 500~1000mPa.s.
BecauseA/B components are in reaction after mixing In the process , Therefore, the viscosity will increase with time. At the same time, the temperature of the external environment also has a great influence on the viscosity, the higher the external temperature,A /BThe more severe the reaction,The faster the viscosity increases.
The mixing viscosity isthe colloid after the AB material is completely and evenly stirred Physical properties, According to different usage scenarios,Yes Mixture viscosity requirements vary.
Low viscosity colloid is suitable for potting profiles with complex structures and narrow line widths in the electronic and electrical fields.: 15px; margin-bottom: 15px; line-height: 1.75em;”>Curing time refers to the pouring time The final processing of the sealing material closes the window, which is a sign that the reaction has basically terminated. The final degree of the reaction is determined by the degree of linkage of the curing reaction.
Curing time is divided into initial curing time and final curing time. Controlling the initial curing time is conducive to the customer’s stable operation of profiles and parts , controlling the final curing time is beneficial to customers’ profile and performance testing, and facilitates further communication between customers and downstream manufacturers. Curing time affects the final application efficiency and performance evaluation of the product.
Gel time：Gel time usually refers to the sign that the reaction is basically completed in the early stage. When reaching the gel state, the colloid does not flow and the chain segment reaction is basically completed. At this time The colloid has basically no hardness and is sticky to the hand.
Table drying time：When the surface becomes non-sticky, touch the colloid lightly with a glass rod, It will not be stuck by colloid. The colloid has a certain hardness and the internal temperature returns to normal temperature.
Curing time：As the name suggests, the time when the glue is completely solidified, when the hardness of the colloid reaches its maximum. Depending on the polymer system, final chemical cure occurs in 3 to 7 days (at room temperature of 23°C) or 24 to 48 hours (at 60°C).
Operation time：Necessary processing window conditions for potting materials, that is, adding a curing agent to the main agent The processing time is still available.
Leave the customer the appropriate operational time, both Satisfy customers’ normal use and improve customers’ work efficiency. Control the operable time so that the glue can completely penetrate or bond the required profiles.
The operable time determines the customer’s actual production requirements. Availability time is often a critical period for customers. Because, after that, the reaction between the glue injection material and the adhesive will progress to the next red process. Since the next step of the process may be very different, the user and the manufacturer must agree on the operable time.
Usually, for machine glue filling and manual glue filling, Or if the profile is complex or simple, the operability time requirements will be inconsistent. As long as the potting of the profile (especially for mass production) is completed after the specified operating time, the material has reached a certain degree of reaction with a certain hardness. According to customer requirements, the manufacturer can adjust the operable time. Operating times can also be shortened through a temperature-controlled curing process. The various thicknesses of the profile structure or surrounding materials in the profile also have an impact.
Shear strength: refers to the material’s ability to withstand shear force, refers to the strength limit when the external force is perpendicular to the axis of the material and exerts a shearing effect on the material. In square meters, the unit pressure experienced in this area is called shear strength. Newton’s division unit area: N/mm².
Tensile strength: refers to the stress calculated when the specimen reaches the maximum tensile force compared to the original section in the tensile test. He describes the mechanical resistance of raw materials when subjected to mechanical loads (such as stretching, vibration, etc.). The unit is N/mm².
Elongation at break: means that the test body breaks during the tensile test.
Title of this article: Explanation of professional terms for high-efficiency filter glue
Source of this article: http ://www.wellgo.com.cn/newb/information_2403.shtml
�;font-size:19px”>refers to the material’s ability to withstand shear force, which refers to the external force perpendicular to the axis of the material and shearing the material. The strength limit under shear action. In square meters, the unit pressure experienced in this area is called shear strength. Newton divided by unit area: N/mm².
Tensile strength: refers to the calculation when the specimen reaches the maximum tensile force compared with the original section in the tensile test The stress produced. He describes the mechanical resistance of raw materials when they are subjected to mechanical loads (such as tension, vibration, etc.). Its unit is N /mm².
Elongation at break:Indicates that the test object breaks during the tensile test.
Title of this article: Explanation of professional terms for high-efficiency filter glue
Source of this article: http ://www.wellgo.com.cn/newb/information_2403.shtml
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