簡(jiǎn)言之，影響復(fù)合季節(jié)的氣候變化也是環(huán)境濕度和溫度兩大指標(biāo)的變化：具體來(lái)說(shuō)，春夏季，特別是雨季，空氣相對(duì)濕度較大，甚至可以達(dá)到飽和，而秋冬季，空氣干燥，濕度小；在氣溫方面，夏季比冬季高得多，兩者之間的更大差值可以接近30～40℃（以南方地區(qū)為例）。如果不注意這些差異，在配制時(shí)可能會(huì)遇到以下問(wèn)題：空氣潮濕時(shí)，膠往往不能完全固化，即不能完全干燥，殘余粘度大、嚴(yán)重，甚至在剝離復(fù)合膜時(shí)會(huì)出現(xiàn)拉絲現(xiàn)象，特別是當(dāng)薄膜本身具有很強(qiáng)的吸濕性時(shí)，例如尼龍膜用于復(fù)合時(shí)，這種現(xiàn)象更為簡(jiǎn)單；其次，潮濕的空氣會(huì)凝結(jié)在膠輥上，從而將水帶入膠盆。隨著時(shí)間的推移，膠水會(huì)逐漸變得混亂和白色，從而失去粘合效果。高溫和潮濕也使膠水難以保存。如果工作膠沒(méi)有在同一天用完，它往往會(huì)變成白色并凝聚成凝膠（果凍）凝膠。相反，當(dāng)冬季寒冷時(shí)，以前未用過(guò)的工作膠在一夜之間仍會(huì)粘附到優(yōu)異的透明流動(dòng)性，甚至可以直接在機(jī)器上使用，而不必在新制備的工作膠中分批混合。另一方面，在冬季溫度較低時(shí)，膠水會(huì)變稠，流動(dòng)性降低。當(dāng)覆膜機(jī)高速運(yùn)轉(zhuǎn)時(shí)，大量氣泡簡(jiǎn)單地堆積在膠水表面和上膠網(wǎng)紋輥邊緣。此時(shí)，可能會(huì)有氣泡轉(zhuǎn)移，由于膠量不足，可能會(huì)影響復(fù)合牢度。同時(shí)，由于復(fù)合膜的平整度和松弛性能差，復(fù)合膜的外觀也較差。例如，膠水的流動(dòng)網(wǎng)紋比較明顯，有時(shí)呈桔皮狀，當(dāng)用于層壓時(shí)，如果印刷表面有大面積的白墨或淺色墨，則在鋁箔或鋁涂層結(jié)合時(shí)更容易形成小白點(diǎn)和斑點(diǎn)；否則，由于冬季氣溫較低，養(yǎng)護(hù)室的溫度與外界環(huán)境溫度相差很大。如果保溫方法不到位，熱損失率遠(yuǎn)遠(yuǎn)快于高溫夏季，這往往使養(yǎng)護(hù)室內(nèi)的溫度達(dá)不到設(shè)定溫度（一般為50攝氏度）。因此，催熟效果也受到一定程度的影響。在同一成熟期，復(fù)合牢度可能低于夏季。

　　In short, the climate change that affects the composite season is also the change of two major indexes of environment humidity and temperature: specifically, in spring and summer, especially in rainy season, the relative humidity of air is large, and even can reach saturation, while in autumn and winter, the air is dry and the humidity is small; in terms of temperature, summer is much higher than winter, and the maximum difference between the two can be close to 30-40 ℃ (in the South Region For example). If we don't pay attention to these differences, we may encounter the following problems in the preparation: when the air is wet, the glue often can't be completely cured, that is, it can't be completely dried, the residual viscosity is large and serious, and even the wire drawing phenomenon will occur when the composite film is peeled off, especially when the film itself has strong moisture absorption, for example, when nylon film is used for composite, this phenomenon is simpler; secondly, moisture The wet air will condense on the rubber roller, thus bringing water into the rubber basin. Over time, the glue will gradually become confused and white, thus losing the bonding effect. High temperature and humidity also make the glue difficult to preserve. If the working gel is not used up on the same day, it tends to turn white and agglomerate into a gel (jelly) gel. On the contrary, when it is cold in winter, the previously unused working adhesive will adhere to excellent transparent fluidity overnight, and can even be used directly on the machine without batch mixing in the newly prepared working adhesive. On the other hand, when the temperature is low in winter, the glue will thicken and the fluidity will decrease. When the laminating machine is running at high speed, a large number of bubbles simply accumulate on the glue surface and the edge of the upper glue anilox roll. At this time, there may be bubble transfer. Due to the insufficient amount of glue, the composite fastness may be affected. At the same time, due to the poor smoothness and relaxation of the composite film, the appearance of the composite film is also poor. For example, the flow pattern of glue is relatively obvious, sometimes in the form of orange peel. When it is used for lamination, if there is a large area of white ink or light color ink on the printing surface, small white spots and spots are more likely to form when the aluminum foil or aluminum coating is combined; otherwise, due to the low temperature in winter, the temperature of the curing room is very different from the external environment temperature. If the insulation method is not in place, the heat loss rate is far faster than that in high-temperature summer, which often makes the temperature in the curing room not reach the set temperature (generally 50 ℃). Therefore, ripening effect is also affected to some extent. In the same mature period, the composite fastness may be lower than that in summer.
　　為了分析上述現(xiàn)象的原因，有必要了解濕度和溫度對(duì)膠粘劑的影響。，雙組分聚氨酯膠粘劑的含水量與主劑聚酯/聚醚多元醇相同，可與固化劑中的NCO基團(tuán)發(fā)生反應(yīng)。估計(jì)1g水可消耗26-32g固化劑。當(dāng)然，這是純響應(yīng)分量比。實(shí)際上，工作膠中的水與固化劑反應(yīng)時(shí)，與主劑競(jìng)爭(zhēng)。然而，無(wú)論反應(yīng)中涉及多少水，都無(wú)疑會(huì)消耗固化劑，使固化劑與主劑之間的反應(yīng)量達(dá)不到原來(lái)設(shè)定的工作比，從而形成不完全固化和殘余粘度。然而，膠粘劑的粘度和反應(yīng)性與溫度密切相關(guān)。用旋轉(zhuǎn)粘度計(jì)在25℃的標(biāo)準(zhǔn)溫度下測(cè)量膠粘劑制造商給出的粘度值，這意味著在實(shí)踐中，夏季工作環(huán)境的溫度比夏季高出10度以上，而冬季工作環(huán)境的溫度可能比寒冷天氣低20度。膠的粘度與溫度正好相反，即，當(dāng)溫度較高時(shí)，同一膠的粘度值較低，流動(dòng)松弛性好，溫度低時(shí)粘度高，流動(dòng)性好。
　　In order to analyze the causes of the above phenomena, it is necessary to understand the influence of humidity and temperature on the adhesive. Firstly, the moisture content of two-component polyurethane adhesive is the same as that of polyester / polyether polyol, which can react with NCO group in curing agent. It is estimated that 1 g of water can consume 26-32 g of curing agent. Of course, this is the pure response component ratio. In fact, when the water in the working adhesive reacts with the curing agent, it competes with the main agent. However, no matter how much water is involved in the reaction, the curing agent will undoubtedly be consumed, so that the reaction amount between the curing agent and the main agent can not reach the original set working ratio, thus forming incomplete curing and residual viscosity. However, the viscosity and reactivity of adhesives are closely related to temperature. The viscosity value given by the adhesive manufacturer is measured with a rotary viscometer at a standard temperature of 25 ℃, which means that in practice, the temperature of the working environment in summer is more than 10 ℃ higher than that in summer, while the temperature of the working environment in winter may be 20 ℃ lower than that in cold weather. The viscosity of the glue is opposite to the temperature, that is, when the temperature is high, the viscosity of the same glue is low, the flow relaxation is good, the viscosity is high and the flow is good when the temperature is low.
　　以上就是對(duì)季節(jié)的氣候?qū)?a >雙組份打膠機(jī)中膠水都有哪些影響的介紹，想要了解更多歡迎訪問(wèn)官網(wǎng)http://linshi.jncsjx.com
　　The above is an introduction to the influence of seasonal climate on the glue in the two-component dispenser. For more information, please visit the official website http://linshi.jncsjx.com