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I believe everyone has used disposable paper cups, but what are the specific components, do you know? The following is Anhui Kuke Packaging Material Co., Ltd. to share, I hope to help you.
Disposable paper cups can be divided into three kinds according to the coating on the surface of the paper cup: wax coated cup, straight wall double layer cup and polyethylene coated cup. The body of the paper cup is made of food grade wood pulp paper. The surface of the wax-coated cup is coated with a layer of water-insulating wax. There are two layers of paper on the wall of the straight wall double layer cup, and there is air between the paper, which has good heat insulation performance. Polyethylene coated cups are coated with a thin layer of polyethylene on the cup wall. The advantage of polyethylene coated cup is that it can handle cold and hot drinks freely, and the surface is smooth, convenient printing exquisite patterns are favored by the fast food industry.
Polyethylene itself is odorless, but if the material selection is not good or the processing technology is not up to standard, under the condition of long time heating, it may be oxidized into carbonyl compounds. Carbonyl compounds are not volatile at room temperature. However, when hot water is poured into a paper cup, they may evaporate. This is the reason why the paper cup sometimes smells funny.
Disposable paper cups can be divided into cold drink cups, hot drink cups and ice cream cups, cold drink cups. It can be frozen or refrigerated, and the safe operating temperature is 0°C to 5°C. The surface of the cold drink paper cup should be treated by spraying or dipping wax.
Because cold drinks can cause water to accumulate on the surface of the paper cup, causing it to soften, apply wax to make it waterproof. Food grade paraffin wax is used in waxed paper cups. The wax is very stable and safe from 0°C to 5°C. If hot drinks are loaded, a layer of emulsion needs to be added. This coating is used for double-walled straight cups. Because double-walled cups have good heat insulation, they are commonly used for hot drinks and ice cream cups. The surface of the hot drink paper cup is also pasted with a special polyethylene film, which not only has good heat resistance, but also is safe and harmless to soak at high temperature.
The above is the knowledge of disposable paper cups introduced by Xiaobian. More information can be found on the website of Anhui Kuke Packaging Materials Co., LTD.
