阅读说明：本技术 一种具有抗氧化活性的瓶盖及其制备方法 (Bottle cap with antioxidant activity and preparation method thereof ) 是由 陈珊珊 于 2019-09-16 设计创作，主要内容包括：本发明涉及高分子材料及食品包装安全技术领域,具体涉及一种具有抗氧化活性的瓶盖及其制备方法,该具有抗氧化活性的瓶盖包括高密度聚乙烯、绿茶萃取物和沙棘叶提取物；或者包括高密度聚乙烯、绿茶萃取物、沙棘叶提取物、迷迭香萃取物和橄榄叶萃取物。其中,绿茶萃取物和沙棘叶提取物具有抗氧化性强的特点,迷迭香萃取物和橄榄叶萃取物也具有较好的抗氧化特性,并且均具有无毒无害的优点。该具有抗氧化活性的瓶盖能够保障新鲜饮品的安全,且能在新鲜饮品储存过程中抑菌,无毒无害,并且所加入的天然抗氧化剂迁移到饮料中可以提高其营养价值,有利于消费者健康。该制备方法,具有方法简单,生产成本低,并能适合于大规模生产的特点。(The invention relates to the technical field of high polymer materials and food packaging safety, in particular to a bottle cap with antioxidant activity and a preparation method thereof, wherein the bottle cap with antioxidant activity comprises high-density polyethylene, a green tea extract and a sea backthern leaf extract; or high density polyethylene, green tea extract, sea buckthorn leaf extract, rosemary extract and olive leaf extract. The green tea extract and the sea backthern leaf extract have the characteristic of strong oxidation resistance, and the rosemary extract and the olive leaf extract also have good oxidation resistance and have the advantages of no toxicity and no harm. The bottle cap with antioxidant activity can ensure the safety of fresh drinks, can inhibit bacteria in the storage process of the fresh drinks, is non-toxic and harmless, and can improve the nutritional value of the drinks by transferring the added natural antioxidant into the drinks, thereby being beneficial to the health of consumers. The preparation method has the characteristics of simple method, low production cost and suitability for large-scale production.)

1. A bottle lid with antioxidant activity which characterized in that: the composite material comprises the following raw materials in parts by weight:

95 to 99 portions of high-density polyethylene

0.5 to 3 parts of green tea extract

0.5 to 3 parts of seabuckthorn leaf extract.

2. The bottle cap with antioxidant activity according to claim 1, wherein: the composite material comprises the following raw materials in parts by weight:

97 portions of high-density polyethylene

2 parts of green tea extract

1 part of seabuckthorn leaf extract.

3. The bottle cap with antioxidant activity according to claim 1, wherein: the composite material comprises the following raw materials in parts by weight:

4. the bottle cap with antioxidant activity as claimed in claim 3, wherein: the composite material comprises the following raw materials in parts by weight:

5. the method for preparing a bottle cap having an antioxidant activity according to any one of claims 1 to 4, wherein: it comprises the following steps:

step one, mixing raw materials: placing the raw materials in a formula ratio in a stirrer to be uniformly stirred to obtain a mixture;

step two, extruding and granulating: adding the mixture obtained in the step one into a double-screw extruder for extrusion granulation to obtain granules;

step three, forming: and D, melting and molding the granules obtained in the step two through a bottle cap mold to obtain the bottle cap with the antioxidant activity.

6. The method for preparing a bottle cap with antioxidant activity according to claim 5, wherein the method comprises the following steps: in the first step, the stirring speed of the stirrer is 1200 rpm-1400 rpm, and the stirring time is 10 min-20 min.

7. The method for preparing a bottle cap with antioxidant activity according to claim 5, wherein the method comprises the following steps: in the second step, the rotating speed of the double-screw extruder is 600 rpm-800 rpm, and the temperature of the double-screw extruder is 170 ℃ to 195 ℃.

8. The method for preparing a bottle cap with antioxidant activity according to claim 5, wherein the method comprises the following steps: in the third step, the melting temperature of the bottle cap mold is 200-250 ℃.

Technical Field

The invention relates to the technical field of high polymer materials and food packaging safety, in particular to a bottle cap with antioxidant activity and a preparation method thereof.

Background

Beverages with high quality and freshness requirements such as fresh fruit juice or fresh milk can be polluted by microorganisms and bacteria in the processes of processing, transportation and storage, and the sanitation of food is further influenced. In addition, after the beverage bottle is opened every time, a part of bacteria can enter the bottle body, bacteria are easy to breed at the contact part of the bottle cap and the bottle opening, and the breeding of the microorganisms and the bacteria can influence the sanitation of the beverage. Therefore, the novel antioxidant bacteriostatic bottle cap has important significance for ensuring the safety of fresh drinks.

At present, synthetic antioxidants are generally adopted in plastic packages, and the synthetic antioxidants can be degraded into small molecular substances during the use process of the plastic, and the small molecular substances can migrate into food or beverage, so that potential risks are generated to the health of consumers. With the pursuit of people for the concept of 'green and healthy' of foods, natural antioxidants are more and more valued. Currently common natural antioxidants are mainly classified into three major groups: plant extracts, essential oils, food industry waste such as green tea, ginkgo leaves, grape seeds, rosemary, etc. The natural antioxidants have more application researches in fresh preservation of fresh fruits and vegetables and meat products. At present, no research on plastics applied to containing drinks exists.

Disclosure of Invention

One of the purposes of the invention is to provide a bottle cap with antioxidant activity, aiming at the defects of the prior art, the bottle cap with antioxidant activity can ensure the safety of fresh drinks, can inhibit bacteria in the storage process of the fresh drinks, is non-toxic and harmless, can improve the nutritive value of the drinks by transferring added natural antioxidants into the drinks, and is beneficial to the health of consumers.

The second purpose of the present invention is to provide a method for preparing a bottle cap with antioxidant activity, which overcomes the defects of the prior art.

In order to achieve one of the purposes, the invention adopts the following technical scheme:

the bottle cap with the antioxidant activity is provided, and comprises the following raw materials in parts by weight:

95 to 99 portions of high-density polyethylene

0.5 to 3 parts of green tea extract

0.5 to 3 parts of seabuckthorn leaf extract.

Preferably, the bottle cap with antioxidant activity comprises the following raw materials in parts by weight:

97 portions of high-density polyethylene

2 parts of green tea extract

1 part of seabuckthorn leaf extract.

Preferably, the bottle cap with antioxidant activity comprises the following raw materials in parts by weight:

preferably, the bottle cap with antioxidant activity comprises the following raw materials in parts by weight:

in order to achieve the second purpose, the invention adopts the following technical scheme:

the preparation method of the bottle cap with the antioxidant activity comprises the following steps:

step one, mixing raw materials: placing the raw materials in a formula ratio in a stirrer to be uniformly stirred to obtain a mixture;

step two, extruding and granulating: adding the mixture obtained in the step one into a double-screw extruder for extrusion granulation to obtain granules;

step three, forming: and D, melting and molding the granules obtained in the step two through a bottle cap mold to obtain the bottle cap with the antioxidant activity.

In the above technical scheme, in the first step, the stirring speed of the stirrer is 1200rpm to 1400rpm, and the stirring time is 10min to 20 min.

In the above technical scheme, in the second step, the rotation speed of the twin screw extruder is 600rpm to 800rpm, and the temperature of the twin screw extruder is 170 ℃ to 195 ℃.

In the above technical scheme, in the third step, the melting temperature of the bottle cap mold is 200 ℃ to 250 ℃.

Compared with the prior art, the invention has the beneficial effects that:

(1) the invention provides a bottle cap with antioxidant activity, which comprises high-density polyethylene, a green tea extract and a sea backthern leaf extract; or high density polyethylene, green tea extract, sea buckthorn leaf extract, rosemary extract and olive leaf extract. The green tea extract and the sea backthern leaf extract have the characteristic of strong oxidation resistance, and the rosemary extract and the olive leaf extract also have good oxidation resistance and have the advantages of no toxicity and no harm. The high-density polyethylene is used as a main material, the green tea extract and the seabuckthorn leaf extract are added, or the green tea extract, the seabuckthorn leaf extract, the rosemary extract and the olive leaf extract are added, so that the safety of the fresh beverage can be guaranteed, the fresh beverage can be bacteriostatic in the storage process, and the added natural antioxidant can be transferred into the beverage to improve the nutritional value of the fresh beverage, thereby being beneficial to the health of consumers.

(2) The preparation method of the bottle cap with the antioxidant activity, provided by the invention, has the characteristics of simple method, low production cost and suitability for large-scale production.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more apparent, the present invention is further described in detail below with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Among them, the High Density Polyethylene (HDPE) referred to in the present invention is also called low pressure Polyethylene, which is a translucent one with High crystallinity and a certain degree of non-polar surface.