雙組份打膠機(jī)在玻璃加工行業(yè)應(yīng)用十分的廣泛，而打膠機(jī)膠粘劑的粘接強(qiáng)度就是玻璃加工質(zhì)量的關(guān)鍵，所以了解影響打膠機(jī)膠粘劑粘接強(qiáng)度的因素就顯得尤為重要，小編在網(wǎng)上整理了大量的資料，接下來就為大家分析一下影響打膠機(jī)膠粘劑粘接強(qiáng)度的物理因素。
Two-component beater is widely used in glass processing industry, and the bonding strength of the adhesive is the key to the quality of glass processing, so it is particularly important to understand the factors affecting the bonding strength of the adhesive of the beater. A large amount of information has been compiled online, and then the physical factors affecting the bonding strength of the adhesive of the beater are analyzed.
1.外表粗糙度。當(dāng)膠粘劑良好地浸潤被粘資料外表時(shí)（接觸角θ<90°），外表的粗糙化有利于進(jìn)步膠粘劑液體對外表的浸潤水平，增加膠粘劑與被粘資料的接觸點(diǎn)密度，從而有利于進(jìn)步粘接強(qiáng)度。反之，當(dāng)膠粘劑對被粘資料浸潤不良時(shí)（θ>90°），外表的粗糙化就不利于粘接強(qiáng)度的進(jìn)步。
1. Surface roughness. When the adhesive saturates the surface of the bonded material well (contact angle is less than 90 degrees), the roughening of the surface is beneficial to the improvement of the wetting level of the adhesive liquid to the surface and the increase of the contact point density between the adhesive and the bonded material, which is conducive to the improvement of the bonding strength. Conversely, when the adhesives are poorly infiltrated with the adhesives (theta > 90 degrees), the roughening of the surface is not conducive to the improvement of the bonding strength.
2.外表處置。粘接前的外表處置是粘接勝利的關(guān)鍵，其目的是能取得結(jié)實(shí)耐久的接頭。由于被粘資料存在氧化層（如銹蝕）、鍍鉻層、磷化層、脫模劑等構(gòu)成的“弱邊境層”，被粘物的外表處置將影響粘接強(qiáng)度。例如，聚乙烯外表可用熱鉻酸氧化處置而改善粘接強(qiáng)度，加熱到70-80℃時(shí)處置1-5分鐘，就會得到良好的可粘接外表，這種辦法適用于聚乙烯板、厚壁管等。而聚乙烯薄膜用鉻酸處置時(shí)，只能在常溫下停止。
2. Appearance disposal. The appearance disposal before bonding is the key to the success of bonding, and its purpose is to obtain strong and durable joints. Due to the existence of "weak boundary layer" consisting of oxide layer (such as rust), chromium plating layer, phosphating layer and release agent, the surface disposal of the adhesives will affect the bonding strength. For example, the appearance of polyethylene can be treated by thermal chromic acid oxidation to improve the bonding strength. When heated to 70-80 C for 1-5 minutes, a good bondable appearance can be obtained. This method is suitable for polyethylene sheets, thick-walled pipes and so on. When polyethylene film is treated with chromic acid, it can only stop at room temperature.

3.浸透。已粘接的接頭，受環(huán)境氛圍的作用，常常被滲進(jìn)一些其他低分子物。例如，接頭在濕潤環(huán)境或水下，水分子浸透入膠層；聚合物膠層在有機(jī)溶劑中，溶劑分子浸透入聚合物中。低分子物的透入使膠層變形，然后進(jìn)入膠層與被粘物界面。使膠層強(qiáng)度降低，從而招致粘接的毀壞。
3. soak. Bonded joints are often infiltrated into other low molecular weight substances due to the effect of environmental atmosphere. For example, in wet environment or underwater, water molecules are immersed in the adhesive layer; in organic solvents, solvent molecules are immersed in the polymer layer. The penetration of low molecular weight first deforms the adhesive layer and then enters the interface between the adhesive layer and the adhesives. It reduces the strength of the adhesive layer, which leads to the destruction of the bonding.
4.壓力。在粘接時(shí)，向粘接面施以壓力，使膠粘劑更容易充溢被粘體外表上的坑洞,以至流入深孔和毛細(xì)管中，減少粘接缺陷。關(guān)于黏度較小的膠粘劑,加壓時(shí)會過度地流淌，形成缺膠。因而，應(yīng)待粘度較大時(shí)再施加壓力，也促使被粘體外表上的氣體逸出，減少粘接區(qū)的氣孔。
4. pressure. When bonding, pressure is applied to the bonding surface, which makes it easier for the adhesive to fill the holes on the surface of the bonded body, and even flow into deep holes and capillaries to reduce bonding defects. For adhesives with lower viscosity, excessive flow will occur under pressure, resulting in glue deficiency. Therefore, the pressure should be applied when the viscosity is high, which also promotes the gas escaping from the surface of the adhered body and reduces the stomata in the bonding zone.
6.膠層厚度。較厚的膠層易產(chǎn)生氣泡、缺陷和早期斷裂，因而應(yīng)使膠層盡可能薄一些，以取得較高的粘接強(qiáng)度。另外，厚膠層在受熱后的熱收縮在界面區(qū)所形成的熱應(yīng)力也較大，更容易惹起接頭毀壞。
6. Thickness of adhesive layer. Thicker adhesive layer is prone to bubble, defect and early fracture, so the adhesive layer should be as thin as possible to obtain higher bonding strength. In addition, the thermal stress formed by the thermal shrinkage of the thick rubber layer in the interface area after heating is also larger, which is more likely to cause joint damage.
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