濟南塑料袋：影響包裝袋透明度因素有哪些？
真空包裝是我們生活中比較常見的氣密性容器，那么我們都知道真空包裝袋一般是呈透明狀的，但也會由于各種因素導(dǎo)致透明度的質(zhì)量。今天就由塑料包裝廠的小編來為您講一下有關(guān)影響真空包裝袋透明度的因素都有哪些吧？
Vacuum packaging is a relatively common airtight container in our life, so we all know that vacuum packaging bags are generally transparent, but the quality of transparency can also be caused by various factors. Today, let's talk about the factors that affect the transparency of vacuum packaging bags?
一、配膠上的問題
1、 Problems in dispensing
不適當(dāng)?shù)呐淠z程序?qū)?dǎo)致主劑與固化劑不能充分混合均勻。可能產(chǎn)生“膠粒”現(xiàn)象。
Improper glue preparation procedure will lead to insufficient and uniform mixing of main agent and curing agent. "Glue particles" may occur.
二、膠黏劑本身顏色深
2、 The adhesive itself is dark
膠黏劑本身顏色太深，深黃色、黃紅色，有時甚使醬油湯那樣的暗紅色，留在膠膜上也是相應(yīng)的顏色。因此，在要求高透明度的場合下，要選用微黃色甚無色的高透明度的膠黏劑。
The color of the adhesive itself is too dark, dark yellow, yellow red, sometimes even dark red like soy sauce soup, which is also the corresponding color left on the film. Therefore, when high transparency is required, a yellowish or even colorless high transparency adhesive should be selected.
塑料袋
塑料袋
三、基材的透明度問題
3、 Transparency of substrate
內(nèi)層基材表面呈現(xiàn)“鯊魚皮”、“流道痕”、晶點等表觀質(zhì)量問題時，將嚴重影響復(fù)合產(chǎn)品的透明度。印刷時轉(zhuǎn)移到非圖文部分的霧狀油墨版污，也明顯影響復(fù)合膜的透明度。
The transparency of the composite product will be seriously affected when the surface of the inner substrate presents "shark skin", "runner mark", crystal point and other apparent quality problems. The haze ink contamination transferred to the non graphic part during printing also significantly affects the transparency of the composite film.
四、烘道溫度設(shè)定不當(dāng)
4、 Improper setting of drying tunnel temperature
一開始進入烘道時的溫度太高，干燥太快，使膠液層表面的溶劑迅速蒸發(fā)，造成表面層膠液濃度的局部提高，表面結(jié)皮，當(dāng)熱量深入到膠液層內(nèi)部后，皮膜下面的溶劑汽化，沖破膠膜，形成火山噴口那樣的環(huán)狀物，一圈一圈的，也使膠層不均勻，也稱“橘皮狀”。因此烘道溫度自入口到出口處應(yīng)逐步提高，由低到高，有一個梯度，讓溶劑有秩序地連續(xù)地由內(nèi)部向外部蒸發(fā)。另外，上膠量過大時，膠層在干燥過程中也相對容易產(chǎn)生上述膠層缺陷。
At the beginning, when entering the drying tunnel, the temperature is too high and the drying is too fast, which makes the solvent on the surface of the glue layer evaporate rapidly, resulting in a local increase in the glue concentration on the surface layer and skin formation on the surface. When the heat goes deep into the glue layer, the solvent under the film vaporizes and breaks the glue film, forming rings like volcanic vents. Circle by circle, it also makes the glue layer uneven, also known as "orange peel". Therefore, the temperature of the drying tunnel should be gradually increased from the inlet to the outlet, with a gradient from low to high, so that the solvent can evaporate from the inside to the outside in an orderly and continuous manner. In addition, when the glue amount is too large, the glue layer is relatively easy to produce the above glue layer defects during the drying process.
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