阅读说明：本技术 一种可降解包装产品 (Degradable packaging product ) 是由 邹雄 李末平 朱志强 于 2020-06-22 设计创作，主要内容包括：本发明公开了一种可降解包装产品,涉及包装技术领域,所述可降解包装产品包括可降解PE膜以及与可降解PE膜复合的其他包装基材。所述一种可降解包装产品的可降解PE膜制备方法包括以下具体步骤：(1)原料选取、(2)熔融搅拌、(3)流延成膜、(4)复合加工。本发明的可降解包装产品采用可降解PE膜可其他包装基材进行复合加工,形成复合包装材料,可降解PE膜具有可降解的特性,经降解后对环境无影响,是一种无污染的包装材料,因此采用该类可降解PE膜与纸等材料进行复合可制成可降解的复合包装材料,对阻隔性要求高的降解包装材料,可采取用纸镀铝或PE镀铝进行复合得到阻隔性更高的包装材料,而可替代目前常使用的VMPET等材料。(The invention discloses a degradable packaging product, and relates to the technical field of packaging. The preparation method of the degradable PE film of the degradable packaging product comprises the following specific steps: (1) selecting raw materials, (2) melting and stirring, (3) casting and film forming, and (4) composite processing. The degradable packaging product of the invention adopts the degradable PE film to carry out composite processing on other packaging base materials to form a composite packaging material, the degradable PE film has the degradable characteristic, has no influence on the environment after degradation, and is a pollution-free packaging material, so the degradable composite packaging material can be prepared by compounding the degradable PE film with materials such as paper and the like, the degradable packaging material with high barrier property requirement can be obtained by compounding with paper aluminizing or PE aluminizing, and the degradable composite packaging material can replace the materials such as VMPET and the like which are commonly used at present.)

1. A degradable packaging product is characterized by comprising a degradable PE film and other packaging base materials compounded with the degradable PE film.

2. The degradable packaging product of claim 1, wherein the method for preparing the degradable PE film of the degradable packaging product comprises the following specific steps:

(1) selecting raw materials;

(2) melting and stirring;

(3) casting to form a film;

(4) and performing composite processing.

3. The degradable packaging product of claim 2, wherein the raw material (1) is selected by weighing 50-60 parts by weight of PE resin, 5-15 parts by weight of degraded starch, 0.5-1 part by weight of photodegradable additive, 0.2-0.5 part by weight of cosolvent and 8-12 parts by weight of cellulose as raw materials of the degradable PE film.

4. The degradable packaging product of claim 2, wherein (2) the melt is stirred, and the proportioned raw materials are added into a stirring device to be heated and sufficiently stirred, so that the mixture is uniformly stirred to form a melt.

5. The degradable packaging product of claim 2, wherein (3) the degradable packaging product is cast into a film, the raw material melt is extruded through an extruder, then the melt raw material is processed through a casting machine to form a PE film, and the PE film is cooled, drawn and coiled to form a finished degradable PE film.

6. The degradable packaging product of claim 2, wherein in the step (4), the degradable PE film finished product is subjected to hot-pressing compounding with other packaging substrates to form the degradable packaging product.

7. The degradable packaging product of claim 1 wherein: the oxygen permeability related to the barrier property of the degradable PE film is less than or equal to 200cm³The water vapor permeability is less than or equal to 7 g/square meter for 24 h.

8. The degradable packaging product of claim 1 wherein: the other packaging substrates compounded with the degradable PE film include but are not limited to paper aluminizing or PE aluminizing.

Technical Field

The invention relates to the technical field of packaging, in particular to a degradable packaging product.

Background

The PE protective film is a macromolecular organic compound with the simplest structure and is a macromolecular material which is widely applied in the world nowadays. The PE protective film uses a special Polyethylene (PE) plastic film as a base material, and is classified into a high density polyethylene protective film, a medium density polyethylene, and a low density polyethylene according to the difference in density.

The existing plastic packaging products are generally not degradable and easily cause environmental pollution, the paper packaging products are poor in service performance and insufficient in heat resistance, and the common single-layer PE film has the requirement on barrier property and cannot meet the use requirements of people easily.

Disclosure of Invention

The invention aims to solve the problems that the existing plastic packaging products can not be degraded generally and easily cause environmental pollution, the paper packaging products have poor service performance and insufficient heat resistance, and the common single-layer PE film has barrier property requirements which are difficult to meet the use requirements of people.

In order to achieve the purpose, the invention provides the following technical scheme: a degradable packaging product comprising: degradable PE film and other packaging base materials compounded with the degradable PE film.

Preferably, the preparation method of the degradable PE film for the degradable packaging product comprises the following specific steps:

(1) selecting raw materials;

(2) melting and stirring;

(3) casting to form a film;

(4) and performing composite processing.

Preferably, the raw materials in the step (1) are selected, and 50-60 parts of PE resin, 5-15 parts of degraded starch, 0.5-1 part of photodegradable additive, 0.2-0.5 part of cosolvent and 8-12 parts of cellulose are weighed according to parts by weight and used as raw materials of the degradable PE film.

Preferably, the step (2) of melting and stirring is to add the proportioned raw materials into a stirring device to heat and fully stir the materials, so that the materials are uniformly stirred to form a melt.

Preferably, the step (3) is to cast a film, extrude the raw material melt through an extruder, process the melt raw material through a casting machine to form a PE film, and cool, draw and wind the PE film to form a finished degradable PE film.

Preferably, the step (4) of composite processing is to perform hot-pressing composite on the degradable PE film finished product and other packaging base materials to form a degradable packaging product.

Preferably, the oxygen permeability related to the barrier property of the degradable PE membrane is less than or equal to 200cm³The water vapor permeability is less than or equal to 7 g/square meter for 24 h.

Preferably, the other packaging substrate compounded with the degradable PE film includes, but is not limited to, aluminized paper or aluminized PE.

The invention provides a degradable packaging product, which has the following beneficial effects:

the degradable packaging product adopts the degradable PE film to perform composite processing on other packaging base materials to form a composite packaging material, the degradable PE film has a degradable characteristic, the degradable PE film is not influenced by the environment after degradation, and the degradable packaging material is a pollution-free packaging material, so the degradable composite packaging material can be prepared by compounding the degradable PE film with materials such as paper and the like, the degradable packaging material with high barrier property requirement can be prepared by compounding the degradable PE film with paper aluminizing or PE aluminizing, so that the commonly used materials such as VMPET (polyethylene terephthalate) and the like are replaced, the PE film adopts PE resin as a main material, has certain heat resistance, and starch and a photodegradation additive are added in the degradable packaging product to enable the PE film to have the degradable characteristic.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to specific embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

The invention provides the technical scheme that: a degradable packaging product comprising: the degradable PE film and other packaging base materials compounded with the degradable PE film; the oxygen permeability related to the barrier property of the degradable PE film is less than or equal to 200cm³Every square meter for 24 hours, the moisture permeability is less than or equal to 7 g/square meter for 24 hours, and the other packaging base materials compounded with the degradable PE film comprise but are not limited to paper aluminizing or PE aluminizing;

the preparation method of the degradable PE film of the degradable packaging product comprises the following specific steps:

(1) selecting raw materials;

(2) melting and stirring;

(3) casting to form a film;

(4) and performing composite processing.