阅读说明：本技术 一种卫生用品内包装的生物降解薄膜 (Biodegradable film for inner package of sanitary product ) 是由 刘辉 于 2019-10-21 设计创作，主要内容包括：一种卫生用品内包装的生物降解薄膜,包括如下重量分数的原料：纤维素8～15份,淀粉10～20份,聚乳酸40～65份,增柔增韧剂10～20份,抗氧化剂3～10份,抗菌剂3～10份,石墨烯1～4份。本发明以聚乳酸(PLA)作为基体聚合物,通过添加纤维素以增加强度,通过添加增柔增韧剂、淀粉、石墨烯来促进纤维素与聚乳酸的混练反应,通过添加抗氧化剂来提高产品稳定性,通过抗菌剂使产品具有良好的抗菌性。本发明产品安全无毒,阻隔性能好,成膜质量优,可完全降解,各项性能指标均达到国家标准；产品在自然条件下可以实现自动降解,可减少环境中不可降解的废塑料件的数量,缓解环境污染的压力。(A biodegradable film for an inner package of a sanitary product comprises the following raw materials in parts by weight: 8-15 parts of cellulose, 10-20 parts of starch, 40-65 parts of polylactic acid, 10-20 parts of a flexibility-increasing toughening agent, 3-10 parts of an antioxidant, 3-10 parts of an antibacterial agent and 1-4 parts of graphene. According to the invention, polylactic acid (PLA) is used as a matrix polymer, the strength is increased by adding cellulose, the mixing reaction of the cellulose and the polylactic acid is promoted by adding a flexibility-increasing toughening agent, starch and graphene, the stability of the product is improved by adding an antioxidant, and the product has good antibacterial property by an antibacterial agent. The product of the invention is safe and nontoxic, has good barrier property and excellent film forming quality, can be completely degraded, and all performance indexes reach the national standard; the product can realize automatic degradation under natural conditions, the number of non-degradable waste plastic pieces in the environment can be reduced, and the pressure of environmental pollution is relieved.)

1. A biodegradable film for the internal package of sanitary articles is characterized in that: comprises the following raw materials in parts by weight: 8-15 parts of cellulose, 10-20 parts of starch, 40-65 parts of polylactic acid, 10-20 parts of a flexibility-increasing toughening agent, 3-10 parts of an antioxidant, 3-10 parts of an antibacterial agent and 1-4 parts of graphene.

2. The biodegradable film for use in an inner package of sanitary products according to claim 1, wherein: comprises the following raw materials in parts by weight: 10 parts of cellulose, 15 parts of starch, 50 parts of polylactic acid, 15 parts of a flexibility-increasing toughening agent, 4 parts of an antioxidant, 4 parts of an antibacterial agent and 2 parts of graphene.

3. A biodegradable film for the internal packaging of sanitary products, according to claim 1 or 2, characterized in that: the fineness of the cellulose and the starch are both 100-300 meshes.

4. A biodegradable film for the internal packaging of sanitary products, according to claim 1 or 2, characterized in that: the cellulose is one or more than two of corn stalk fiber, bamboo fiber, flax, hemp, jute, kenaf, sisal, abaca, ramie and oil palm.

5. A biodegradable film for the internal packaging of sanitary products, according to claim 1 or 2, characterized in that: the starch is one or more of corn starch, wheat starch, cassava starch, sweet potato starch and potato starch.

6. A biodegradable film for the internal packaging of sanitary products, according to claim 1 or 2, characterized in that: the number average molecular weight of the polylactic acid is 100000-300000.

7. A biodegradable film for the internal packaging of sanitary products, according to claim 1 or 2, characterized in that: the flexibility-increasing and toughening agent is one or more of sorbitol, glycerol, propylene glycol, glucose, fructose and sucrose.

8. A biodegradable film for the internal packaging of sanitary products, according to claim 1 or 2, characterized in that: the antioxidant is one or more of eugenol, tea polyphenol, vitamin E, vitamin C, sodium citrate, purple sweet potato pigment and purple cabbage extract.

9. A biodegradable film for the internal packaging of sanitary products, according to claim 1 or 2, characterized in that: the antibacterial agent is one or more of garlicin, chitin, castor oil or horseradish powder.

10. A biodegradable film for the internal packaging of sanitary products, according to claim 1 or 2, characterized in that: the fineness of the graphene is 100-200 meshes.

Technical Field

The invention relates to the technical field of high polymer materials, in particular to a biodegradable film for an inner package of a hygienic product.

Background

Along with the global mass exploitation of petroleum, the polymer resin brings abundant material resources to people in daily life, and the use of disposable plastic products, personal hygiene products, packaging materials and the like brings great convenience to people; meanwhile, the waste after the disposable plastic products, personal hygiene products, packaging materials and the like are used seriously pollute the global environment, and the waste can exist stably in the nature for a long time and is difficult to degrade, so the waste is difficult to recycle and treat, and the environment is seriously polluted.

In recent years, biodegradable materials are rapidly applied and developed in the plastic packaging industry, and the quality and the yield of the biodegradable packaging materials are continuously improved and increased. However, the biodegradable materials in the field of inner packaging of the current sanitary products generally have the problems of high production cost, low comprehensive performance, poor barrier property and the like, and can not well protect the sterility and cleanness of the packaged contents and prevent the products from being polluted by the external environment, thereby limiting the development of the biodegradable materials in the field of sanitary packaging.

Disclosure of Invention

Aiming at the problems, the invention aims to provide the biodegradable film for the inner package of the hygienic product, which is environment-friendly, non-toxic, good in barrier property, excellent in film forming quality and completely degradable.

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

a biodegradable film for an inner package of a sanitary product comprises the following raw materials in parts by weight: 8-15 parts of cellulose, 10-20 parts of starch, 40-65 parts of polylactic acid, 10-20 parts of a flexibility-increasing toughening agent, 3-10 parts of an antioxidant, 3-10 parts of an antibacterial agent and 1-4 parts of graphene.

Preferably, the components and the weight percentage are as follows: comprises the following raw materials in parts by weight: 10 parts of cellulose, 15 parts of starch, 50 parts of polylactic acid, 15 parts of a flexibility-increasing toughening agent, 4 parts of an antioxidant, 4 parts of an antibacterial agent and 2 parts of graphene.

Preferably, the fineness of the cellulose and the starch are both 100-300 meshes.

Preferably, the cellulose is one or more than two of corn stalk fiber, bamboo fiber, flax, hemp, jute, kenaf, sisal, abaca, ramie and oil palm.

Preferably, the starch is one or more of corn starch, wheat starch, cassava starch, sweet potato starch and potato starch.

Preferably, the number average molecular weight of the polylactic acid is 100000-300000; the polylactic acid (PLA) is used as a matrix polymer, is prepared by using starch raw materials provided by renewable plant resources (such as corn, cassava and the like), and has good biodegradability; the starch raw material is saccharified to obtain glucose, the glucose and certain strains are fermented to prepare high-purity lactic acid, and the polylactic acid is synthesized by a chemical synthesis method.

Preferably, the flexibility-enhancing and toughening agent is one or more of sorbitol, glycerol, propylene glycol, glucose, fructose and sucrose; the secondary valence bonds among the molecules of the matrix polymer are weakened by adding the flexibility-increasing toughening agent, the mobility of the molecular bonds is increased, the crystallinity of the molecules is reduced, the plasticity of the molecules is increased, the flexibility of the product is enhanced, and the product is easy to process.

Preferably, the antioxidant is one or more of eugenol, tea polyphenol, vitamin E, vitamin C, sodium citrate, purple sweet potato pigment and purple cabbage extract.

Preferably, the antibacterial agent is one or more of allicin, chitin, castor oil or horseradish powder.

Preferably, the fineness of the graphene is 100-200 meshes.

The invention has the beneficial effects that:

1. the polylactic acid (PLA) is used as a matrix polymer, so that the polylactic acid has good mechanical properties and physical properties, and is good in compatibility and degradability; the strength can be increased by adding cellulose; the mixing reaction of cellulose and polylactic acid is promoted by adding a flexibility-increasing toughening agent, starch and graphene; the mobility of molecular bonds and the flexibility and plasticity of the material are increased by the flexibility increasing toughening agent; the starch can play a role in filling and expanding the volume, and part of the starch and the cellulose can generate polylactic acid; the product stability is improved by adding the antioxidant, and the effect of delaying the oxidative deterioration of the product is achieved; the antibacterial agent can make the product have good antibacterial property.

2. According to the invention, through reasonable proportioning of the raw materials, the product prepared by adopting the formula can realize automatic degradation under natural conditions, so that the number of non-degradable waste plastic parts in the environment is greatly reduced, and the pressure of environmental pollution is relieved.

3. The product of the invention has simple preparation process, and can be directly used for producing various sanitary article inner packaging materials, such as paper diapers, sanitary towel outer-layer coated packaging films and the like on general plastic forming equipment after being synthesized by chemical reaction and physical mixing under specific formula and process conditions; the product of the invention is safe and nontoxic, has excellent film forming quality and good barrier property, can effectively realize the antibacterial and moistureproof functions of sanitary articles, can be completely degraded in a short time after being buried in soil, and has all performance indexes reaching the national standard.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail 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.