阅读说明：本技术 一种含铝箔的可降解袋及其制备方法 (Degradable bag containing aluminum foil and preparation method thereof ) 是由 谢伟峰 于 2020-05-14 设计创作，主要内容包括：本发明公开了一种含铝箔的可降解袋,包括以下重量份的原料制备而成：麦秆纸浆纤维10-20份、紫薯粉30-50份、木薯粉80-100、贝壳粉90-120份、玉米粉100-130份、南瓜皮粉70-100份和椰子壳粉70-100份,所述含铝箔的可降解袋的主体从外到内主要由第一层基材,第二层基材和第三层基材合成,述第一层基材为牛皮纸或PLA,所述第二层基材为PLA镀铝箔；所述第三层基材为PLA。本发明的制备方法包括袋子压合：牛皮纸表面涂布环保胶水,在湿润状态下即与第一层PLA基材通过复合装置进行挤压复合,再与第二层PLA基材通过复合装置进行挤压复合,制得复合半成品；烘干成型：通过熟化室烘干除去溶剂,使3层基材复合在一起。本发明对环境友好,且有利于土地种植。(The invention discloses an aluminum foil-containing degradable bag which is prepared from the following raw materials in parts by weight: 10-20 parts of wheat straw pulp fiber, 30-50 parts of purple sweet potato powder, 80-100 parts of cassava powder, 90-120 parts of shell powder, 100-130 parts of corn flour, 70-100 parts of pumpkin peel powder and 70-100 parts of coconut shell powder, wherein the main body of the degradable bag containing the aluminum foil is mainly synthesized by a first layer of base material, a second layer of base material and a third layer of base material from outside to inside, the first layer of base material is kraft paper or PLA, and the second layer of base material is PLA-plated aluminum foil; the third layer of base material is PLA. The preparation method of the invention comprises bag pressing: coating environment-friendly glue on the surface of kraft paper, extruding and compounding the kraft paper and a first layer of PLA base material through a compounding device in a wet state, and extruding and compounding the kraft paper and a second layer of PLA base material through the compounding device to prepare a composite semi-finished product; drying and forming: drying in a curing chamber to remove the solvent, and compounding the 3 layers of the base materials together. The invention is environment-friendly and beneficial to land planting.)

1. The aluminum foil-containing degradable bag is characterized by comprising the following raw materials in parts by weight: 10-20 parts of wheat straw pulp fiber, 30-50 parts of sweet potato powder, 80-100 parts of cassava powder, 90-120 parts of shell powder, 100-130 parts of corn flour, 70-100 parts of pumpkin peel powder and 70-100 parts of coconut shell powder, wherein the main body of the degradable bag containing the aluminum foil is mainly synthesized by a first layer of base material, a second layer of base material and a third layer of base material from outside to inside, the first layer of base material is kraft paper or PLA, and the second layer of base material is PLA plated with aluminum foil; the third layer of base material is PLA.

2. The aluminum foil containing degradable pouch of claim 1 wherein: the feed is prepared from the following raw materials in parts by weight: 10-15 parts of wheat straw pulp fiber, 30-45 parts of purple sweet potato powder, 80-90 parts of cassava powder, 30-50 parts of chitosan, 90-110 parts of shell powder, 100 parts of corn flour, 70-80 parts of pumpkin peel powder and 70-85 parts of coconut shell powder.

3. The aluminum foil containing degradable pouch of claim 1 wherein: the feed is prepared from the following raw materials in parts by weight: 15-50 parts of wheat straw pulp fiber, 45-50 parts of purple sweet potato powder, 90-100 parts of cassava powder, 50-60 parts of chitosan, 120 parts of shell powder 110-containing materials, 130 parts of corn powder 110-containing materials, 80-100 parts of pumpkin peel powder and 85-100 parts of coconut shell powder.

4. The aluminum foil containing degradable pouch of claim 1 wherein: the feed is prepared from the following raw materials in parts by weight: 10-20 parts of wheat straw pulp fiber, 35-45 parts of purple sweet potato powder, 85-90 parts of cassava powder, 35-40 parts of chitosan, 95-110 parts of shell powder, 90-110 parts of corn flour, 75-90 parts of pumpkin peel powder and 70-85 parts of coconut shell powder.

5. The degradable bag containing aluminum foil according to claim 4, wherein: the feed is prepared from the following raw materials in parts by weight: 15 parts of wheat straw pulp fiber, 40 parts of purple sweet potato powder, 90 parts of cassava powder, 40 parts of chitosan, 100 parts of shell powder, 100 parts of corn powder, 80 parts of pumpkin peel powder and 70 parts of coconut shell powder.

6. The aluminum foil containing degradable pouch of claim 5 wherein: the feed is characterized by also comprising the following raw materials in parts by weight: 15 parts of polylactic acid and 50 parts of bark powder of the Chinese medicinal materials.

7. A method of making the aluminum foil containing degradable pouch of any one of claims 1 to 6 wherein: the method comprises the following steps:

(S1) weighing the following raw materials: weighing the raw materials according to the weight part ratio;

(S2) preparing a first mixed liquid: firstly, uniformly mixing wheat straw pulp fibers, purple sweet potato powder, cassava powder, chitosan, shell powder, corn powder, pumpkin peel powder and coconut shell powder, and adding water to dilute to prepare a first mixture;

(S3) preparing a second mixed liquid: adding the first mixed liquid material prepared in the step (S2) into a mixing container, and uniformly mixing the first mixed liquid material with polylactic acid to prepare a second mixed liquid material;

(S4) preparing a third mixed liquid: adding the hundred-thousand-layer bark powder into a mixing container, and uniformly mixing with the second mixture prepared in the step (S3) to prepare a third mixed liquid material;

(S5) gelatinizing the liquid material: heating the third mixed liquid material to remove climate to prepare a gelatinized liquid material;

(S6) forming the base material: drying the gelatinized liquid material to obtain a PLA base material;

(S7) bag pressing: when the first layer of base material is kraft paper, coating environment-friendly glue on the surface of the kraft paper, extruding and compounding the kraft paper with the PLA aluminized foil base material in a wet state, and extruding and compounding the kraft paper with the PLA base material to prepare a composite semi-finished product or; when the first layer of base material is PLA, the first layer of PLA and the PLA aluminized foil base material can be directly extruded and compounded, and then the first layer of PLA and the other layer of PLA are extruded and compounded to prepare a semi-finished product;

(S8) drying and forming: drying in a curing chamber to remove the solvent, and compounding the 3 base materials together.

8. The method for preparing the degradable bag containing aluminum foil according to claim 7, wherein the method comprises the following steps: the conditions for mixing in (S2) were: the temperature is 100 ℃, the rotating speed is 700r/min, and the mixing time is 2 h; the conditions for mixing in (S3) were: the temperature is 110 ℃, the rotating speed is 800r/min, and the mixing time is 1 h; the conditions for mixing in (S3) were: the temperature is 120 ℃, the rotating speed is 1000r/min, and the mixing time is 1-1.5 h; (S7) the extrusion condition is 50-70 ℃; (S8) drying at 50-75 deg.C for 2 days.

9. The method for preparing the degradable bag containing aluminum foil according to claim 7, wherein the method comprises the following steps: (S5) the gelatinization condition is 85 ℃ for 75 min; the drying temperature in (S6) was 85 ℃; (S7) extrusion conditions of 65 ℃; (S8) the drying condition is 70 ℃ for 2 days.

Technical Field

The invention relates to the technical field of packaging paper, in particular to a degradable bag containing aluminum foil and a preparation method thereof.

Background

Plastic bags (Plastic bags) are bags made of plastics (commonly used plastics include polyethylene, polypropylene, polyester, nylon and the like) as main raw materials, are essential articles in daily life of people, and are often used for containing other articles. The plastic bag has the advantages of low price, extremely light weight, large capacity and convenient storage, but is prohibited from production and use by some countries due to the defects of extremely long degradation period and difficult processing of the plastic bag. According to the trend that relevant national regulations stipulate that supermarkets limit the use of plastic bags and countries, Europe, America and the like advocate the use of environment-friendly paper bags, the plastic pollution is strictly controlled, the plastic bags are replaced by the environment-friendly paper bags, and the market prospect of white kraft paper is good. The variety of the paper bag is various, the variety of the paper material is various, and the style is also various. The paper can be divided into white cardboard paper bags, copperplate paper bags, kraft paper bags and a small amount of special paper. The white cardboard has the advantages of high stiffness, high bursting strength, high smoothness and flat paper surface, and the common thickness of the white cardboard is 210-300 g, and the maximum thickness of the white cardboard is 230 white cardboards. The paper bag printed by the white cardboard is full in color and very good in texture, and is the first choice for customization. The coated paper has the characteristics of smooth and flat paper surface, high whiteness, high smoothness and good glossiness, and also ensures that printed figures and pictures have stereoscopic impression, the common thickness is 128-300 g, the printing effect of the coated paper is the same as that of white cardboard, the color is full and bright, and compared with the white cardboard, the stiffness of the coated paper is inferior to that of the white cardboard. The white kraft paper has high bursting strength, good toughness, high strength, and stable evenness, thickness and color image. The environment-friendly white kraft paper is made of 100% pure wood pulp, is environment-friendly and nontoxic, can be recycled in an environment-friendly manner, has good toughness, does not need to be coated with a film, and is widely used for manufacturing environment-friendly clothing handbags, high-grade shopping bags and the like. According to different purposes, the bag comprises an archive bag, an envelope, a handbag, a cement bag, a feed bag, a wax paper bag, a chemical fertilizer bag, a compound film paper bag, a four-layer paper bag, a medicine bag, a clothes bag, a food bag, a shopping bag, a gift bag and a wine bag.

However, in the prior art, no matter the plastic bag is difficult to decompose, or the recyclable paper bag exerts a certain pressure on the land environment, when the plastic bag is discarded in the land, the plastic bag and the recyclable paper bag both pollute the land, although the degree of pollution of the paper bag on the land environment is lower than that of the plastic bag, when people gradually replace the plastic bag with the paper bag, the number of the paper bag is increased, and under the current situation that an effective recycling mechanism is lacked, a considerable number of the paper bags are discarded and buried underground, so that the land pollution is caused. Environmental pollution is caused by burning the paper bags.

Disclosure of Invention

The technical problem to be solved by one aspect of the present invention is to provide a degradable bag containing aluminum foil, which contributes to reducing damage to the environment and facilitates land cultivation.

In order to solve the technical problems, the technical scheme of the invention is as follows:

the aluminum foil-containing degradable bag is prepared from the following raw materials in parts by weight: 10-20 parts of wheat straw pulp fiber, 30-50 parts of sweet potato powder, 80-100 parts of cassava powder, 90-120 parts of shell powder, 100-130 parts of corn flour, 70-100 parts of pumpkin peel powder and 70-100 parts of coconut shell powder, wherein the main body of the degradable bag containing the aluminum foil is mainly synthesized by a first layer of base material, a second layer of base material and a third layer of base material from outside to inside, the first layer of base material is kraft paper or PLA, and the second layer of base material is PLA plated with aluminum foil; the third layer of base material is PLA.

Preferably, the feed additive is prepared from the following raw materials in parts by weight: 10-15 parts of wheat straw pulp fiber, 30-45 parts of purple sweet potato powder, 80-90 parts of cassava powder, 30-50 parts of chitosan, 90-110 parts of shell powder, 100 parts of corn flour, 70-80 parts of pumpkin peel powder and 70-85 parts of coconut shell powder.

Preferably, the feed additive is prepared from the following raw materials in parts by weight: 15-50 parts of wheat straw pulp fiber, 45-50 parts of purple sweet potato powder, 90-100 parts of cassava powder, 50-60 parts of chitosan, 120 parts of shell powder 110-containing materials, 130 parts of corn powder 110-containing materials, 80-100 parts of pumpkin peel powder and 85-100 parts of coconut shell powder.

More preferably, the feed additive is prepared from the following raw materials in parts by weight: 10-20 parts of wheat straw pulp fiber, 35-45 parts of purple sweet potato powder, 85-90 parts of cassava powder, 35-40 parts of chitosan, 95-110 parts of shell powder, 90-110 parts of corn flour, 75-90 parts of pumpkin peel powder and 70-85 parts of coconut shell powder.

More preferably, the feed additive is prepared from the following raw materials in parts by weight: 15 parts of wheat straw pulp fiber, 40 parts of purple sweet potato powder, 90 parts of cassava powder, 40 parts of chitosan, 100 parts of shell powder, 100 parts of corn powder, 80 parts of pumpkin peel powder and 70 parts of coconut shell powder.

Particularly preferably, the feed additive is prepared from the following raw materials in parts by weight: 15 parts of polylactic acid and 50 parts of bark powder of the Chinese medicinal materials.

In another aspect, the present invention provides a method for preparing a degradable bag containing aluminum foil, comprising the following steps:

(S1) weighing the following raw materials: weighing the raw materials according to the weight part ratio;

(S2) preparing a first mixed liquid: firstly, uniformly mixing wheat straw pulp fibers, purple sweet potato powder, cassava powder, chitosan, shell powder, corn powder, pumpkin peel powder and coconut shell powder, and adding water to dilute to prepare a first mixture;

(S3) preparing a second mixed liquid: adding the first mixed liquid material prepared in the step (S2) into a mixing container, and uniformly mixing the first mixed liquid material with polylactic acid to prepare a second mixed liquid material;

(S4) preparing a third mixed liquid: adding the hundred-thousand-layer bark powder into a mixing container, and uniformly mixing with the second mixture prepared in the step (S3) to prepare a third mixed liquid material;

(S5) gelatinizing the liquid material: heating the third mixed liquid material to remove climate to prepare a gelatinized liquid material;

(S6) forming the base material: drying the gelatinized liquid material to obtain a PLA base material;

(S7) bag pressing: when the first layer of base material is kraft paper, coating environment-friendly glue on the surface of the kraft paper, extruding and compounding the kraft paper with the PLA aluminized foil base material in a wet state, and extruding and compounding the kraft paper with the PLA base material to prepare a composite semi-finished product or; when the first layer of base material is PLA, the first layer of PLA and the PLA aluminized foil base material can be directly extruded and compounded, and then the first layer of PLA and the other layer of PLA are extruded and compounded to prepare a semi-finished product;

(S8) drying and forming: drying in a curing chamber to remove the solvent, and compounding the 3 base materials together.

Preferably, the mixing conditions in (S2) are: the temperature is 100 ℃, the rotating speed is 700r/min, and the mixing time is 2 h; the conditions for mixing in (S3) were: the temperature is 110 ℃, the rotating speed is 800r/min, and the mixing time is 1 h; the conditions for mixing in (S3) were: the temperature is 120 ℃, the rotating speed is 1000r/min, and the mixing time is 1-1.5 h; (S7) the extrusion condition is 50-70 ℃; (S8) drying at 50-75 deg.C for 2 days.

More preferably, the gelatinization condition in (S5) is 85 ℃ for 75 min; the drying temperature in (S6) was 85 ℃; (S7) extrusion conditions of 65 ℃; (S8) the drying condition is 70 ℃ for 2 days.

The invention has the following beneficial effects:

by adopting the technical scheme, the straw pulp fiber, the purple sweet potato powder, the cassava powder, the shell powder, the corn flour, the pumpkin peel powder and the coconut shell powder are used as raw materials to be combined with the biodegradable PLA, the raw materials are animal and plant fibers or powder obtained by extracting and grinding animals and plants, and the PLA base layer and the bag synthesized by the PLA base layer are prepared from the animal and plant fibers or powder.

In addition, the corn flour and the coconut husk powder contain rich calcium and are beneficial to land, and the purple sweet potato powder and the cassava powder can be used as planting fertilizers in the decomposition process. The shell powder contains calcium carbonate, and when water is absorbed in the shell powder, the firmness of the shell powder can be increased, and the situation that the bag is easily softened after being contacted with moisture is avoided.

Detailed Description

The following further describes the embodiments of the present invention. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

According to the embodiment of the invention, the PLA, the kraft paper and the PLA aluminized foil are compounded together to prepare the bag, so that the problem of environmental pollution in the prior art is solved, and the effects of biodegradability and environmental friendliness of the bag are realized. The present invention provides the following embodiments: