阅读说明：本技术 一种风琴状可降解袋及其制备方法 (Organ-shaped degradable bag and preparation method thereof ) 是由 谢伟峰 于 2020-05-14 设计创作，主要内容包括：本发明公开了一种风琴状可降解袋,包括以下重量份的原料制备而成：一种风琴状可降解袋,其特征在于,包括以下重量份的原料制备而成：麦秆纸浆纤维10-20份、白薯粉10-50份、木薯粉10-20、30-50份和百千层树皮纤维70-150份；所述风琴状可降解袋包括八条边；所述风琴状可降解袋的主体从外到内可以由第一基材,第二基材和第三基材合成,所述第一基材为多层牛皮纸,所述第二基材和第三基材均为PLA；所述风琴状可降解袋的主体从外到内还可以由两层牛皮纸和PLA组成或者由PLA-PLA组成；本发明还提供风琴状可降解袋的制备方法包括基材成型,将糊化液料缩聚和干燥处理。本发明的原料可被微生物消化掉的原料,降低对环境的破坏,其中,动植物粉还可在降解后作为肥料,对土地有益。(The invention discloses an organ-shaped degradable bag which is prepared from the following raw materials in parts by weight: the organ-shaped degradable bag is characterized by comprising the following raw materials in parts by weight: 10-20 parts of wheat straw pulp fiber, 10-50 parts of sweet potato powder, 10-20 parts of cassava powder, 30-50 parts of multi-layer bark fiber and 70-150 parts of multi-layer bark fiber; the organ-shaped degradable bag comprises eight edges; the main body of the organ-shaped degradable bag can be synthesized by a first base material, a second base material and a third base material from outside to inside, wherein the first base material is multilayer kraft paper, and the second base material and the third base material are both PLA; the main body of the organ-shaped degradable bag can also consist of two layers of kraft paper and PLA or PLA-PLA from outside to inside; the invention also provides a preparation method of the organ-shaped degradable bag, which comprises the steps of base material forming, gelatinization liquid material polycondensation and drying treatment. The raw materials of the invention can be digested by microorganisms, thus reducing the damage to the environment, wherein the animal and plant powder can be used as fertilizer after being degraded, thus being beneficial to the land.)

1. The organ-shaped degradable bag is characterized by comprising the following raw materials in parts by weight: 10-20 parts of wheat straw pulp fiber, 10-50 parts of sweet potato powder, 10-20 parts of cassava powder, 30-50 parts of barley shell powder and 70-150 parts of huperzia serrata bark fiber; the organ-shaped degradable bag comprises eight edges; the main body of the organ-shaped degradable bag can be synthesized by a first base material, a second base material and a third base material from outside to inside, wherein the first base material is multilayer kraft paper, and the second base material and the third base material are both PLA; the main body of the organ-shaped degradable bag can also consist of two layers of kraft paper and PLA or PLA-PLA from outside to inside; the two sides of the organ-shaped degradable bag are folded.

2. The accordion-like degradable bag of claim 1 wherein: the feed is prepared from the following raw materials in parts by weight: 10-12 parts of wheat straw pulp fiber, 10-20 parts of sweet potato powder, 10-15 parts of cassava powder, 30-40 parts of barley shell powder and 70-130 parts of huperzia serrata bark fiber.

3. The accordion-like degradable bag of claim 1 wherein: the feed is prepared from the following raw materials in parts by weight: 12-20 parts of wheat straw pulp fiber, 20-50 parts of sweet potato powder, 15-20 parts of cassava powder, 40-50 parts of barley shell powder and 150 parts of huperzia serrata bark fiber 130-containing material.

4. The accordion-like degradable bag of claim 1 wherein: the feed is prepared from the following raw materials in parts by weight: 12-15 parts of wheat straw pulp fiber, 20-40 parts of sweet potato powder, 18-20 parts of cassava powder, 45-50 parts of barley shell powder and 100-140 parts of huperzia serrata bark fiber.

5. The accordion-like degradable bag 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, 30 parts of sweet potato powder, 18 parts of cassava powder, 45 parts of barley hull powder and 120 parts of bark fiber of Chinese huperzia serrata.

6. The accordion-like degradable bag according to claim 5, wherein: the feed is characterized by also comprising the following raw materials in parts by weight: 120 parts of scallop powder, 100 parts of fresh oyster shell powder, 80 parts of conch shell powder, 50 parts of bagasse powder and 15 parts of polylactic acid.

7. A method of making the accordion-like degradable bag 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, white potato powder, cassava powder, parts and multi-layer bark fibers, 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 scallop powder, fresh oyster shell powder, conch shell powder and bagasse 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: performing condensation polymerization and drying treatment on the gelatinized liquid material to obtain a PLA base material;

(S7) bag pressing: coating environment-friendly glue on the surface of the inner layer of the multilayer kraft paper, extruding and compounding the inner layer of the multilayer kraft paper and a first layer of PLA base material through a compounding device in a wet state, and extruding and compounding the inner layer of the multilayer kraft paper and a second layer of PLA base material through the compounding device to obtain a compounded semi-finished product;

(S8) drying and forming: drying the substrate in a curing chamber to remove the solvent, so that the substrates are compounded together.

8. The method for preparing an organ-shaped degradable bag according to claim 7, wherein the method comprises the following steps: the conditions for mixing in (S2) were: the temperature is 125 ℃, the rotating speed is 1300-; the conditions for mixing in (S3) were: the temperature is 110 ℃, the rotating speed is 100r/min, and the mixing time is 1-1.5 h; the conditions for mixing in (S3) were: the temperature is 120 ℃, the rotating speed is 1200r/min, and the mixing time is 2-2.5 h; (S7) the extrusion condition is 50-70 ℃; (S8) drying at 50-75 deg.C for 2 days.

9. The method for preparing an organ-shaped degradable bag according to claim 7, wherein the method comprises the following steps: (S5) the gelatinization condition is 85-90 ℃ and the time is 90-120 min; (S6) the drying temperature is 85-90 ℃; (S7) the extrusion conditions are 70 ℃; (S8) the drying condition is 75 ℃, 2 days.

Technical Field

The invention relates to the technical field of packaging, in particular to a degradable bag, and especially relates to an organ-shaped degradable bag 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. It is widely used because of its advantages of low cost, extremely light weight, large capacity, and easy storage. The plastic brings convenience to the life of people and brings difficult-to-collect aftertroubles to the environment, and the disaster of the plastic to the environment is called as 'white pollution'. Plastics are chemical petroleum products extracted from petroleum or coal and once produced are difficult to degrade naturally. The annual output of plastics in China is 3000 ten thousand tons, and the consumption is over 600 ten thousand tons. If the plastic bags are calculated according to 15% of the plastic waste amount per year, the plastic waste amount is 1500 million tons all over the world, the annual plastic waste amount in China is more than 100 million tons, and the proportion of the waste plastic in the garbage accounts for 40%, so that a large amount of waste plastic is buried underground as garbage, and undoubtedly, greater pressure is brought to the cultivable land which is originally lacked. The plastic is buried underground for 200 years without being decomposed and degraded, and a large amount of plastic wastes are buried underground, so that the permeability of the soil can be damaged, the soil is hardened, and the growth of plants is influenced. If the livestock eats the mixed feed by mistake or the plastic remained in the field, the livestock can also die due to obstruction of the digestive tract.

Aiming at the problem of plastic bags, a plurality of countries adopt methods of incineration (thermal energy regeneration) or reprocessing manufacturing (product regeneration) to treat waste plastics. The two methods can recycle the waste plastics, thereby achieving the purpose of saving resources. However, in the prior art, because the waste plastics can generate harmful gas to human bodies when being incinerated or reprocessed, and pollute the environment, the treatment of the waste plastics is still a great problem in environmental protection work.

Disclosure of Invention

The technical problem to be solved by the invention is to provide an organ-like degradable bag which is effective in reducing environmental pollution and can be used as agricultural compost.

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

an organ-shaped degradable bag is prepared from the following raw materials in parts by weight: 10-20 parts of wheat straw pulp fiber, 10-50 parts of sweet potato powder, 10-20 parts of cassava powder, 30-50 parts of multi-layer bark fiber and 70-150 parts of multi-layer bark fiber; the main body of the organ-shaped degradable bag can be synthesized by a first base material, a second base material and a third base material from outside to inside, wherein the first base material is multilayer kraft paper, and the second base material and the third base material are both PLA; the main body of the organ-shaped degradable bag can also consist of two layers of kraft paper and PLA or PLA-PLA from outside to inside; the two sides of the organ-shaped degradable bag are folded.

Preferably, the feed additive is prepared from the following raw materials in parts by weight: 10-12 parts of wheat straw pulp fiber, 10-20 parts of sweet potato powder, 10-15 parts of cassava powder, 30-40 parts of multi-layer bark fiber and 70-130 parts of multi-layer bark fiber.

Preferably, the feed additive is prepared from the following raw materials in parts by weight: 12-20 parts of wheat straw pulp fiber, 20-50 parts of sweet potato powder, 15-20 parts of cassava powder, 40-50 parts of huperzia serrata bark fiber and 150 parts of rhizoma coptidis bark fiber.

More preferably, the feed additive is prepared from the following raw materials in parts by weight: 12-15 parts of wheat straw pulp fiber, 20-40 parts of sweet potato powder, 18-20 parts of cassava powder, 45-50 parts of multi-layer bark fiber and 140 parts of multi-layer bark fiber.

More preferably, the feed additive is prepared from the following raw materials in parts by weight: 15 parts of wheat straw pulp fiber, 30 parts of sweet potato powder, 18 and 45 parts of cassava powder and 120 parts of bark fiber of Chinese huperzia serrata.

Particularly preferably, the feed additive is prepared from the following raw materials in parts by weight: 120 parts of scallop powder, 100 parts of fresh oyster shell powder, 80 parts of conch shell powder, 50 parts of bagasse powder and 15 parts of polylactic acid.

The chitin is a product obtained after deacetylation reaction, the deacetylation degree (D.D) determines the content of amino (NH2) on a macromolecular chain, D.D is increased, charged groups in a dilute acid solution are increased due to protonation of the amino, the charge density of polyelectrolyte is increased, and the structure, property and performance of the chitin are changed.

Particularly preferably, the feed additive is prepared from the following raw materials in parts by weight: 120 parts of scallop powder, 100 parts of fresh oyster shell powder, 80 parts of conch shell powder, 50 parts of bagasse powder, 15 parts and 10 parts of polylactic acid.

In another aspect, the invention provides a method for preparing an organ-shaped degradable bag, 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, white potato powder, cassava powder, parts and multi-layer bark fibers, 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 scallop powder, fresh oyster shell powder, conch shell powder and bagasse 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: performing condensation polymerization and drying treatment on the gelatinized liquid material to obtain a PLA base material;

(S7) bag pressing: coating environment-friendly glue on the surface of the inner layer of the multilayer kraft paper, extruding and compounding the inner layer of the multilayer kraft paper and a first layer of PLA base material through a compounding device in a wet state, and extruding and compounding the inner layer of the multilayer kraft paper and a second layer of PLA base material through the compounding device to obtain a compounded semi-finished product;

(S8) drying and forming: drying the substrate in a curing chamber to remove the solvent, so that the substrates are compounded together.

Preferably, the mixing conditions in (S2) are: the temperature is 125 ℃, the rotating speed is 1300-; the conditions for mixing in (S3) were: the temperature is 110 ℃, the rotating speed is 100r/min, and the mixing time is 1-1.5 h; the conditions for mixing in (S3) were: the temperature is 120 ℃, the rotating speed is 1200r/min, and the mixing time is 2-2.5 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 85-90 ℃ and the time is 90-120 min; (S6) the drying temperature is 85-90 ℃; (S7) the extrusion conditions are 70 ℃; (S8) the drying condition is 75 ℃, 2 days.

By adopting the technical scheme, because the straw pulp fiber, the sweet potato powder and the cassava powder are used as raw materials to prepare the PLA base material, and the PLA and the kraft paper base material are pressed into the bag, the straw, the sweet potato powder and the cassava are all raw materials which can be digested by microorganisms, so that the bag can be degraded, and the damage to the environment is reduced. The combination of hundred thousand bark fibers increases the toughness of the bag.

In addition, the scallop powder, the fresh oyster shell powder, the conch shell powder and the bagasse powder belong to animal shells and plant raw materials, are beneficial to degradation of the bag, and can be used as a fertilizer after degradation, so that the fertilizer is beneficial to the land.

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.

For solving the environmental pollution problem that the plastic bag brought among the prior art, this application has solved among the prior art plastic bag and has been difficult to degrade through the combination that uses PLA and a series of degradable materials, causes the problem of negative effects to the soil, has realized friendly to the environment, the profitable benefit to the soil.

In order to better understand the above technical solutions, the following detailed descriptions will be provided.