Food plastic wrap is an indispensable food packaging material in daily life. Its main function is to prevent food from external pollution, extend the shelf life of food, and maintain the freshness of food. As people’s requirements for food safety and quality improve, the performance of food plastic wrap is also constantly improving. Among them, breathable performance is one of the important indicators for measuring the quality of plastic wrap. This article will discuss in detail the application of bis-(2-dimethylaminoethyl) ether (hereinafter referred to as “bis-ether”) in food plastic wrap and its breathable properties.
Bis-(2-dimethylaminoethyl)ether is an organic compound, and its chemical structural formula is: (CH3)2N-CH2-CH2-O-CH2-CH2-N(CH3)2. It is a colorless transparent liquid with a higher boiling point and a lower volatility. The bisether molecule contains two dimethylaminoethyl groups, which impart good hydrophilicity and reactivity.
Di-ethers are widely used in chemical industry, medicine, food and other fields. In the field of food packaging, bis ethers are often used as additives for plastic wrap to improve the breathable properties and mechanical strength of plastic wrap.
Breathable performance refers to the ability of plastic wrap to allow gases (such as oxygen, carbon dioxide, etc.) to pass through. Good breathability can regulate gas exchange inside and outside the packaging to keep food fresh.
Diesel ethers can be added to plastic wrap by:
The addition of bis ether can significantly improve the breathable performance of plastic wrap. The following is the relationship between the amount of bis ether added and the breathable properties of plastic wrap:
| Disether addition amount (%) | Breathable performance (cm3/m2·24h·atm) |
|---|---|
| 0 | 500 |
| 1 | 600 |
| 2 | 750 |
| 3 | 900 |
| 4 | 1100 |
It can be seen from the above table that with the increase of the amount of diether addition, the breathable performance of plastic wrap is significantly improved.
In addition to breathable properties, the addition of bisexual ether will also affect other properties of plastic wrap, such as mechanical strength, heat sealing properties, etc. The following is the relationship between the amount of bis ether added and the mechanical strength of plastic wrap:
| Disether addition amount (%) | Tension Strength (MPa) | Elongation of Break (%) |
|---|---|---|
| 0 | 20 | 300 |
| 1 | 22 | 320 |
| 2 | 24 | 340 |
| 3 | 26 | 360 |
| 4 | 28 | 380 |
From the above table, it can be seen that the addition of bisexual ether not only improves the breathable properties of the plastic wrap, but also enhances its mechanical strength.
Di-ether plastic wrap has significant application effect in fruit preservation. The following are bis-ether plastic wrap and ordinary plastic wrap to keep fresh in applesComparison in:
| Milk film type | Safety time (days) | Weight loss rate (%) | Hardness (N) |
|---|---|---|---|
| Ordinary plastic wrap | 10 | 5 | 20 |
| Di-ether plastic wrap | 15 | 3 | 25 |
From the table above, it can be seen that bis-ether plastic wrap is better than ordinary plastic wrap in terms of extending apple freshness, reducing weight loss rate and maintaining hardness.
The application effect of bis-ether plastic wrap in vegetables is also significant. The following is a comparison between bis-ether plastic wrap and ordinary plastic wrap in lettuce preservation:
| Milk film type | Safety time (days) | Weight loss rate (%) | Color retention rate (%) |
|---|---|---|---|
| Ordinary plastic wrap | 7 | 8 | 70 |
| Di-ether plastic wrap | 10 | 5 | 85 |
From the table above, it can be seen that bis-ether plastic wrap is better than ordinary plastic wrap in extending the freshness time of lettuce, reducing weight loss rate and maintaining color.
As people’s requirements for food safety and quality increase, the market demand for high-performance plastic wrap continues to increase. Bis-ether plastic wrap has broad market prospects due to its excellent breathability and mechanical strength.
The main plastic wrap brands on the market currently include:
| Brand | Main Products | Features |
|---|---|---|
| Brand A | Ordinary plastic wrap | Low price, average breathable performance |
| B Brand | High-performance plastic wrap | Good breathability and high price |
| C Brand | Di-ether plastic wrap | Excellent breathability and moderate price |
From the table above, it can be seen that bis-ether plastic wrap has a competitive advantage in terms of performance and price.
In the future, the development trends of bis-ether plastic wrap include:
Bis-(2-dimethylaminoethyl) ether, as a highly efficient additive, has significantly improved the breathable properties and mechanical strength of the plastic wrap. Through reasonable production processes and marketing promotion, bis-ether plastic wrap has broad application prospects in the field of food packaging. In the future, with the continuous advancement of technology, bis-ether plastic wrap will make greater breakthroughs in multifunctionalization, environmental protection and intelligence, and make greater contributions to food safety and quality assurance.
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