KR102628973B1 - Carbon Neutral Eco-Friendly Nanoinorganic Particle Filled Polyethylene Film Wrap - Google Patents

Abstract

The present invention may relate to a carbon-neutral, eco-friendly polyethylene film wrap molded from a resin composition consisting of 10 to 70% by weight of inorganic nano particles, polyethylene resin, polyethylene-based copolymer containing carboxylic acid groups, and quicklime particles. The polyethylene film wrap according to the present invention has excellent transparency, toughness, and adhesion, and not only has excellent recyclability when disposed of, but even if it is not recycled and is incinerated, the amount of carbon dioxide generated is reduced by the amount of nano inorganic particles filled, making it possible to respond to carbon neutrality. .

Description

Carbon Neutral Eco-Friendly Nanoinorganic Particle Filled Polyethylene Film Wrap}

The present invention may relate to a carbon-neutral, eco-friendly, nano-inorganic particle-filled polyethylene film wrap.

More specifically, it is filled with eco-friendly nano inorganic particles that not only have excellent transparency, toughness and adhesion, and have excellent recyclability upon disposal, but can also respond to carbon neutrality by reducing the amount of carbon dioxide generated by the content of the filled nano inorganic particles even if they are not recycled and incinerated. It may relate to a polyethylene film wrap molded from a polyethylene resin composition.

Polyethylene film wrap has excellent transparency, toughness, and adhesion, and has excellent packaging moldability as well as excellent economic efficiency, so it is used as a packaging material for food packaging, packaging of products of various shapes, packaging of products loaded in boxes, and packaging of products loaded on pallets. It is widely used around the world.

Recently, as the delivery (transportation) market has grown rapidly due to COVID-19, its use has become indispensable, and as the use of polyethylene film wrap has increased, the disposal of this waste after use has become socially serious. In addition, with the global declaration of carbon neutrality, innovative measures to reduce carbon dioxide emissions from incineration of combustible waste such as polyethylene film wrap are urgently requested.

Therefore, there is an urgent and urgent need for the emergence of a new carbon-neutral polyethylene film wrap that has excellent transparency, toughness, and adhesiveness, and is suitable for disposable products that require economic efficiency, while also being recyclable and reducing carbon dioxide emissions.

In order to solve the above problems, the present inventor conducted extensive research and arrived at the present invention.

In other words, the present invention is a new polyethylene film that has excellent transparency, toughness, and adhesion, and has excellent recyclability upon disposal. Even if it is not recycled and incinerated, the amount of carbon dioxide generated is reduced by the content of the filled nano inorganic particles, making it possible to respond to carbon neutrality. We would like to provide a rap.

One aspect of the present invention that solves the above problem provides a carbon-neutral, eco-friendly polyethylene film wrap molded from a resin composition consisting of 10 to 70% by weight of inorganic nano particles, polyethylene resin, polyethylene-based copolymer containing carboxylic acid groups, and quicklime particles. By doing so, the above problem may have been solved.

Another aspect of the present invention may solve the above problem by providing a carbon-neutral, eco-friendly polyethylene film wrap in which the nano inorganic particles have an average particle diameter of 1 to 500 nm.

In one embodiment, the inorganic nano particles include calcium carbonate, talc, clay, kaolin, silica, diatomaceous earth, magnesium carbonate, calcium chloride, calcium sulfate, barium sulfate, aluminum hydroxide, zinc oxide, magnesium hydroxide, titanium oxide, alumina, It may be about a carbon-neutral, eco-friendly polyethylene film wrap that is one or more selected from mica, asbestos powder, zeolite, clay silicate, and mixtures thereof.

In one embodiment, the polyethylene resin may relate to a carbon-neutral, eco-friendly polyethylene film wrap that is at least one selected from the group consisting of low-density polyethylene, linear low-density polyethylene, medium-density polyethylene, and high-density polyethylene.

In one embodiment, it may relate to a carbon-neutral, eco-friendly polyethylene film wrap having a polyethylene resin content of 20 to 80% by weight.

In one embodiment, the polyethylene-based copolymer containing a carboxylic acid group may relate to a carbon-neutral, eco-friendly polyethylene film wrap that is a polyethylene-based copolymer containing methacrylic acid or acrylic acid.

In one embodiment, the polyethylene-based copolymer containing a carboxylic acid group may relate to a carbon-neutral, eco-friendly polyethylene film wrap having a carboxylic acid content of 3 to 20% by weight.

In one embodiment, the quicklime particles may be related to a carbon-neutral, eco-friendly polyethylene film wrap in which the quicklime particles have an average particle diameter of 0.01 to 100㎛.

In one embodiment, it may relate to a carbon-neutral, eco-friendly polyethylene film wrap having a quicklime particle content of 1 to 10% by weight.

In one embodiment, the resin composition may relate to a carbon-neutral, eco-friendly polyethylene film wrap further containing polyolefin elastomer.

In one embodiment, the polyolefin elastomer may be a carbon-neutral, eco-friendly polyethylene film wrap that is a polyethylene-based elastomer or a polypropylene-based elastomer.

In one embodiment, it may relate to a carbon-neutral, eco-friendly polyethylene film wrap having a polyolefin elastomer content of 1 to 30% by weight.

In one embodiment, the resin composition may relate to a carbon-neutral, eco-friendly polyethylene film wrap that further contains polybutene.

In one embodiment, it may relate to a carbon-neutral, eco-friendly polyethylene film wrap having a polybutene content of 1 to 10% by weight.

In one embodiment, the polyethylene film wrap may relate to a carbon-neutral, eco-friendly polyethylene film wrap obtained by upward blown film molding or T-die casting film molding of a resin composition.

In one embodiment, the polyethylene film wrap may be a carbon-neutral, eco-friendly polyethylene film wrap that is a single-layer or two-layer or more multi-layered film.

The object of the present invention is to provide excellent transparency, toughness, and adhesion despite having at least 10% by weight, at most 25% by weight, at most 40% by weight and up to 70% by weight of nano inorganic particles, The goal is to obtain a new polyethylene film wrap that not only has excellent recyclability when discarded, but also can respond to carbon neutrality by reducing carbon dioxide emissions by the content of the filled nano inorganic particles even if it is not recycled and incinerated.

The important point of the present invention is to dramatically reduce the amount of carbon dioxide generated by dramatically reducing the content of flammable synthetic resins such as polyethylene resin in polyethylene film wrap, a representative disposable product.

However, as a result of filling with regular micro-sized inorganic particles, the desired transparency and toughness could not be secured, leading to great difficulties in solving the problem.

As a new means to solve this problem, filling with nano inorganic particles significantly improved transparency and toughness, but did not reach a satisfactory level. This was presumed to be due to the fact that dispersion of nano-sized inorganic particles was very difficult compared to micro-sized inorganic particles.

Therefore, focusing on the fact that the nano inorganic particles usually have hydrophilic surface characteristics, a polyethylene-based copolymer containing a carboxylic acid group that can form a strong hydrogen bond with these hydrophilic surfaces was introduced, resulting in a dramatic improvement in the dispersibility of the nano inorganic particles. Transparency and robustness have been greatly improved to almost the desired level. However, as the nano-inorganic particle content increased significantly above 40% by weight, it failed to secure the desired level of transparency and toughness.

Accordingly, as a result of repeated research, the present inventors introduced a new polyolefin resin composition containing 10 to 70% by weight of nano inorganic particles, polyethylene resin, polyethylene-based copolymer containing carboxylic acid groups, and quicklime particles, and as a result, achieved the desired excellent properties. Transparency, toughness, and adhesion have been secured, and it has excellent recyclability upon disposal. As the amount of combustible polyethylene resin that cannot be recycled and is contained when incinerated decreases, the amount of carbon dioxide generated is dramatically reduced, making it possible to respond to carbon neutrality. This invention has been completed. This is because the newly introduced quicklime particles react with the carboxylic acid groups of the polyethylene-based copolymer containing carboxylic acid groups and change into calcium carboxylic acid bases, thereby increasing the toughness of the film by developing a pseudo-crosslinked structure by forming ion clusters between them. The strong long-distance interaction between the ions and the surface of the nano-inorganic particles significantly improves the dispersion power, ultimately improving transparency and toughness. It also reacts with the moisture present on the surface of the inorganic particles, which can be converted into fine water vapor gas during film molding by extrusion. It is inferred that this is the result of further improving toughness by blocking moisture generation in advance.

In one embodiment, the nanoparticles of the nano-inorganic particles include calcium carbonate, talc, clay, kaolin, silica, diatomaceous earth, magnesium carbonate, calcium chloride, calcium sulfate, barium sulfate, aluminum hydroxide, zinc oxide, magnesium hydroxide, titanium oxide, It may be one or more selected from alumina, mica, asbestos powder, zeolite, clay silicate, and mixtures thereof. The nano inorganic particles may be spherical, plate-shaped, needle-shaped, etc., but spherical ones with good dispersibility in polyethylene resin are preferred. Untreated inorganic nano particles are also good, but those surface-treated with compounds such as stearic acid are preferred because they have good dispersibility. The average particle diameter of the nano inorganic particles is 1 to 500 nm, preferably 10 to 100 nm. The amount of nano inorganic particles added is 10 to 70% by weight, preferably 25 to 60% by weight. If it is less than 10% by weight, the carbon neutrality effect is small due to the reduction of carbon dioxide emissions during incineration due to a decrease in the synthetic resin content, and if it exceeds 70% by weight, the carbon neutrality effect is excellent, but there is a risk that toughness and adhesiveness may deteriorate.

In one embodiment, the polyethylene resin may be one or more selected from the group consisting of low-density polyethylene, linear low-density polyethylene, medium-density polyethylene, and high-density polyethylene. The polyethylene resin may be manufactured using a Ziegler-Natta catalyst, a metalocene catalyst, etc. Among these, linear low-density polyethylene manufactured using a metalocene catalyst is preferred in terms of toughness. In the resin composition of the present invention, the polyethylene resin content is preferably 20 to 80% by weight, preferably 30 to 70% by weight. If the polyethylene content is less than 20% by weight, the desired toughness cannot be expected, and if it exceeds 80% by weight, the carbon neutrality effect may be reduced.

In one embodiment, the polyethylene-based copolymer containing a carboxylic acid group is specifically a polyethylene-based copolymer containing methacrylic acid or acrylic acid, such as methacrylic acid-ethylene copolymer, acrylic acid-ethylene copolymer, or methacrylic acid-methyl methacrylate. Examples include acrylate-ethylene copolymer, acrylic acid-methylacrylate-ethylene copolymer, and more specific examples include Nucrel 0403 from DuPont, USA, which is an ethylene methacrylate copolymer, Escor 6000 from ExxonMobil, USA, which is an acrylic acid-ethylene copolymer, and acrylic acid. -Methyl acrylate-ethylene copolymer Escor AT310 from ExxonMobil, USA, etc., but is not limited thereto. In the resin composition of the present invention, the content of the polyethylene-based copolymer containing a carboxylic acid group is preferably 3 to 20% by weight, preferably 5 to 10% by weight. At the above composition ratio, it is preferred because of its excellent dispersibility and toughness, but is not limited thereto.

In the present invention, the quicklime particles can be any of the usual quicklime surfaces obtained by calcining limestone at high temperature, but those with an average particle diameter of 0.01 to 100㎛, preferably 0.5 to 30㎛, more preferably 0.1 to 10㎛. good night. If the average particle size is too large, the toughness and appearance of the product deteriorate. Particles can have various shapes, but it is preferable to use spherical shapes considering toughness, but it is not limited to this.

The quicklime particle content is preferably 1 to 10% by weight, preferably 2 to 8% by weight. If the quicklime particle content is less than 1% by weight, desired toughness cannot be expected, and if it exceeds 10% by weight, toughness and adhesiveness may decrease.

The resin composition according to an example of the present invention may further include polyolefin elastomer. If more polyolefin elastomer is included, toughness and adhesion can be improved.

The polyolefin elastomer may be a polyethylene-based elastomer or a polypropylene-based elastomer.

The polyethylene-based elastomer according to an example of the present invention has an ethylene content of 70 to 95% by weight, propylene, 1-butene, 1-pentene, 1-hexene, 1-heptene, 1-octene, 1-nonene, 1- Ethylene-alpha-olefin copolymer-based elastomer containing 5 to 30% by weight of one or more alpha-olefins selected from decene and 1-dodecene, high-density or medium-density ethylene-alphaolefin hard block, and low-density ethylene-alpha -It may be any one or a mixture of two or more selected from the group consisting of polyethylene multi-block copolymer-based elastomers composed of olefin soft blocks. Specific examples include ethylene-butene copolymer elastomers manufactured by Mitsui Chemical under the trade names Tafmer Grade XM-7070, Examples include 8440 and 8450, and Dow Chemical's product names Infuse, Grade 9000, 9007, which are polyethylene multiblock copolymer-based elastomers composed of high-density or medium-density ethylene-alpha-olefin hard blocks and low-density ethylene-alpha-olefin soft blocks. Examples include, but are not limited to, 9010 and 9100.

The polypropylene-based elastomer according to an example of the present invention has a propylene content of 70 to 95% by weight, and ethylene, 1-butene, 1-pentene, 1-hexene, 1-heptene, 1-octene, 1-nonene, 1-nonene, It may be any one or a mixture of two or more selected from the group consisting of propylene-alpha-olefin copolymer-based elastomers containing 5 to 30% by weight of any one or two or more alpha-olefins selected from -decene and 1-dodecene. Specific examples include ExxonMobil's Vistamaxx, Grade 2120, 2125, 2320, 2330, 3000, 3020FL, 3980FL, 6102FL, 6202, and 6202FL, which are propylene-ethylene copolymer-based elastomers, and Mistui, which is a propylene-1-butene copolymer-based elastomer. Chemicals company product names include Notio, grade PN-2070, PN-3560, PN0040, PN-2060, etc., but are not limited thereto.

The polyolefin elastomer content is preferably 1 to 30% by weight, preferably 3 to 20% by weight. If the polyolefin elastomer content is less than 1% by weight, the desired improvement in toughness and adhesion cannot be expected, and if it exceeds 30% by weight, rigidity decreases and polyolefin elastomer is generally somewhat expensive, which may reduce economic feasibility.

The resin composition according to an example of the present invention may further contain polybutene. If more polybutene is included, the adhesiveness can be particularly improved.

Polybutene according to an example of the present invention is an organic polymer manufactured from a mixture of 1-butene, 2-butene, and isobutylene. Specific examples include DL Chemical Company's PB1300, PB1400, PB2000, PB2350, and PB2400. It is not limited.

The polybutene content is preferably 1 to 10% by weight, preferably 2 to 8% by weight. If the polybutene content is less than 1% by weight, the desired effect of improving adhesion cannot be expected, and if it exceeds 10% by weight, there is a risk that toughness may decrease.

The polyethylene film wrap according to the present invention can be obtained by conventional upward blown film molding or T-die casting film molding using the above resin composition, and T-die casting film is advantageous for mass production and securing thin film thickness uniformity. A molding method is preferable.

The polyethylene film wrap according to the present invention may be a single-layer film or a multi-layered film of two or more layers. For example, a two-layer structure film manufactured by co-extrusion using a resin composition advantageous in adhesion and transparency as a raw material for the inner layer and a resin composition advantageous in toughness and transparency as a raw material for the outer layer, a resin composition advantageous in adhesion and transparency is produced. A three-layer product manufactured by co-extrusion using a resin composition advantageous for toughness and transparency as a raw material for the layer, a resin composition advantageous for toughness and transparency as a raw material for the middle layer, and a resin composition advantageous for toughness, transparency, and anti-blocking properties (roll film unwinding) as a raw material for the outer layer. It may be a structural film.

The polyethylene film wrap according to the present invention has excellent transparency, toughness, and adhesion, and not only has excellent recyclability upon disposal, but even if it is not recycled and is incinerated, the amount of carbon dioxide generated is reduced by the content of the filled nano inorganic particles, making it a product capable of responding to carbon neutrality. It is expected that it will be useful.

The following describes an example to specifically explain the present invention, but the present invention is not limited to the following examples.

The transparency, toughness, adhesion, and carbon-neutral eco-friendliness of the samples prepared according to the following examples and comparative examples were evaluated as follows.

1. Transparency

For product samples, haze was measured according to ASTM D1003 and rated as grade 4.

- Transparency evaluation criteria division ◎(Excellent) ○(good) △(normal) X (defective) Cloudiness (%) less than 5 5 or more
less than 10 over 10
less than 20 20 or more

2. Toughness

The toughness of the sample was measured according to KS M3503: 2010. The stiffness was measured by tensile strength (MPa), and the toughness was measured by elongation (%) and evaluated at 4 grades.

-Stiffness evaluation criteria division ◎(Excellent) ○(good) △(normal) X (defective) tensile strength
(MPa) 25 or more 20 or more
less than 25 over 10
less than 20 less than 10

- Personality evaluation criteria division ◎(Excellent) ○(good) △(normal) X (defective) elongation rate
(%) 600 or more 500 or more
less than 600 300 or more
less than 500 less than 300

3. Adhesiveness

As a product sample, the adhesion (cling force) was measured using TA.XTplus Texture Analyzer according to ASTM D6862, and the adhesion was evaluated as a 4 grade.

- Adhesion evaluation criteria division ◎(Excellent) ○(good) △(normal) X (defective) Adhesion (g) over 50 over 40
less than 50 over 30
less than 40 less than 30

4. Carbon neutral eco-friendliness

In accordance with ISO-3451-1: 2008, the carbon-neutral eco-friendliness was measured by measuring the inorganic content (% by weight) contained in the sample from the amount of ash when the sample was placed in a crucible and completely incinerated at a temperature of 600°C. It was evaluated by grade.

- Carbon neutral eco-friendliness evaluation criteria division ◎(Excellent) ○(good) △(normal) X (defective) Mineral content (% by weight) over 40 25 or more
less than 40 over 10
less than 25 less than 10

[Example 1]

Calcium carbonate (Shiraishi Calcium Co., Ltd., CaCO ₃ (A)) with an average particle diameter of 50 nm coated with stearic acid as nano-inorganic particles, and linear low-density polyethylene (g/10 min, 190°C, 2.16 Kg) as a polyethylene resin. Lotte Chemical, UT404, PE(A)), a polyethylene-based copolymer containing carboxylic acid groups, a methacrylic acid-ethylene copolymer (Dow, Nucrel 903) with a melt index of 2.5 (g/10 min, 190°C, 2.16Kg) , PEC(A)), quicklime particles (American Elements, CaO(A)) with an average particle diameter of 1.2 μm were prepared. A mixture of these with the composition shown in Table 6 was put into a Banbury mixer and compounded to obtain a polyethylene resin composition. The polyethylene resin composition was manufactured into a 15 μm thick film using a T-die casting film molding machine, and transparency, toughness (stiffness, toughness), adhesion, and carbon-neutral eco-friendliness were evaluated, and the results are shown in Table 6.

[Example 2]

A 15 μm thick film was prepared in the same manner as in Example 1 except that a mixture with the composition shown in Table 6 was used, and its transparency, toughness (rigidity, toughness), adhesion, and carbon neutral eco-friendliness were evaluated. The results are shown in Table 6.

[Example 3]

A 15 μm thick film was prepared in the same manner as in Example 1 except that a mixture with the composition shown in Table 6 was used, and its transparency, toughness (rigidity, toughness), adhesion, and carbon neutral eco-friendliness were evaluated. The results are shown in Table 6.

[Example 4]

A 15 μm thick film was prepared in the same manner as in Example 1 except that a mixture with the composition shown in Table 6 was used, and its transparency, toughness (rigidity, toughness), adhesion, and carbon neutral eco-friendliness were evaluated. The results are shown in Table 6.

[Example 5]

Barium sulfate (Nanochemazone, BaSO ₄ (A)) with an average particle diameter of 125 nm coated with stearic acid as nano inorganic particles, and linear low-density polyethylene (SK) with a melt index of 0.9 (g/10 min, 190°C, 2.16 Kg) as polyethylene resin. Global Chemicals, FN810, PE(B)), and quicklime particles with an average particle diameter of 3.0 μm (Birch Chemicals, CaO(B)) were prepared. Except that a mixture with the composition shown in Table 6 was used, Example 1 and A 15 μm thick film was manufactured in the same manner, and its transparency, toughness (stiffness, toughness), adhesion, and carbon-neutral eco-friendliness were evaluated, and the results are shown in Table 6.

[Example 6]

As a polyolefin elastomer, a density of 0.857 (g/cm3), a melt viscosity of 1.0 (g/10 min, 190°C, 2.16 Kg), and a polyethylene elastomer (Dow, Engage 8842, PEE (A)) were prepared, the composition shown in Table 6. A 15 μm thick film was manufactured in the same manner as in Example 1 except that a mixture mixed with indicated.

[Example 7]

Acrylic acid-ethylene copolymer (ExxonMobil, Escor 5000, PEC(B)) with a melt index of 8.2 (g/10 min, 190°C, 2.16Kg) as a polyethylene-based copolymer containing carboxylic acid groups, molecular weight as polybutene of 2,180, viscosity 2,300 cSt (100°C) polybutene (DL Chemicals, PB2000, PB(A)) was prepared. The same procedure as in Example 1 was performed except that a mixture with the composition shown in Table 6 was used, and a 15 μm thick product was prepared. A film was manufactured and its transparency, toughness (stiffness, toughness), adhesion, and carbon neutral eco-friendliness were evaluated, and the results are shown in Table 6.

[Example 8]

As polyolefin elastomer, density 0.859 (g/cm3), melt viscosity 4.0 (g/10 min, 230℃, 2.16Kg), polypropylene elastomer (ExxonMobil, Vistamaxx 7810, PPE(A)), polybutene, molecular weight 2,480, viscosity 4,740 cSt (100°C) polybutene (DL Chemicals, PB2400, PB(B)) was prepared. The same procedure as in Example 1 was performed except that a mixture with the composition shown in Table 6 was used, and a 15 μm thick product was prepared. A film was manufactured and its transparency, toughness (stiffness, toughness), adhesion, and carbon neutral eco-friendliness were evaluated, and the results are shown in Table 6.

[Comparative Example 1]

A 15 μm thick film was prepared in the same manner as in Example 1 except that a mixture with the composition shown in Table 6 was used, and its transparency, toughness (rigidity, toughness), adhesion, and carbon neutral eco-friendliness were evaluated. The results are shown in Table 6.

[Comparative Example 2]

A 15 μm thick film was prepared in the same manner as in Example 1 except that a mixture with the composition shown in Table 6 was used, and its transparency, toughness (rigidity, toughness), adhesion, and carbon neutral eco-friendliness were evaluated. The results are shown in Table 6.

[Comparative Example 3]

Calcium carbonate (Omya, CaCO ₃ (B)) with an average particle size of 3.5 μm coated with stearic acid was prepared as microinorganic particles. The procedure was carried out in the same manner as in Example 1 except that a mixture with the composition shown in Table 6 was used. A 15 μm thick film was manufactured and its transparency, toughness (rigidity, toughness), adhesion, and carbon-neutral eco-friendliness were evaluated, and the results are shown in Table 6.

[Comparative Example 4]

As microinorganic particles, barium sulfate (Hoyonn, BaSO ₄ (B)) with an average particle diameter of 4.0 μm coated with stearic acid was prepared. The same procedure as in Example 1 was performed except that a mixture with the composition shown in Table 6 was used. A 15 μm thick film was manufactured and its transparency, toughness (rigidity, toughness), adhesion, and carbon-neutral eco-friendliness were evaluated, and the results are shown in Table 6.

division Composition of resin composition (% by weight) Properties carbon neutral
Eco-friendliness nano inorganic particles polyethylene resin Polyethylene containing carboxylic acid group
copolymer quicklime
particle polyolefin elastomer polybutene transparency toughness adhesiveness hardness tenacity Example 1 CaCO ₃ (A) 15% PE(A)
78.5% PE(A)
5% CaO(A)
1.5% - - ◎ ◎ ◎ ○ ○ Example 2 CaCO ₃ (A) 23% PE(A)
66.8% PE(A)
8% CaO(A)
2.2% - - ◎ ◎ ◎ ○ ○ Example 3 CaCO ₃ (A) 32% PE(A)
55.1% PE(A)
10% CaO(A)
2.9% - - ◎ ◎ ◎ ○ ◎ Example 4 CaCO ₃ (A) 54% PE(A)
23.4% PE(A)
19% CaO(A)
3.6% - - ○ ○ ○ ○ ◎ Example 5 BaSO ₄ (A) 37% PE(B)
47.8% PE(A)
12% CaO(B)
3.2% - ◎ ◎ ○ ○ ◎ Example 6 BaSO ₄ (A)42% PE(B)
31% PE(A)
14% CaO(B)
3.0% PEE(A)
10% - ○ ○ ◎ ◎ ◎ Example 7 CaCO ₃ (A) 43% PE(B)
35.7% PE(B)
15% CaO(B)
3.3% - PB(A)
3% ○ ○ ○ ◎ ◎ Example 8 CaCO ₃ (A) 38% PE(B)
26.9% PE(B)
13% CaO(B)
3.1% PPE(A)
15% PB(B)
4% ○ ◎ ◎ ◎ ◎ Comparative Example 1 - PE(A)
100% - - - - ◎ ◎ ◎ △ X Comparative Example 2 - PE(A)
80% - - PPE(A)
20% - ◎ ◎ ◎ ○ X Comparative Example 3 CaCO ₃ (B) 20% PE(A)
80% - - - - X X X X ○ Comparative Example 4 BaSO ₄ (B)
38% PE(A)
44% - - PEE(A)
18% - X X X △ ◎

First, in the case of a polyethylene film wrap formed from a resin composition consisting of nano-inorganic particles, polyethylene resin, polyethylene-based copolymer containing carboxylic acid groups, and quicklime particles according to the present invention (Examples 1 to 5), transparency, toughness, adhesiveness, and carbon neutrality are eco-friendly. It can be seen that the properties are excellent, and in the case of a polyethylene film wrap molded from a polyethylene resin composition further containing polyolefin elastomer or polybutene in addition to nano inorganic particles, polyethylene resin, carboxylic acid group-containing polyethylene copolymer, and quicklime particles (implemented) Examples 6 to 8) It can be seen that transparency, toughness, adhesion, and carbon neutral eco-friendliness are even better.

On the other hand, in the case of a polyethylene film wrap formed only with polyethylene resin according to the conventional technology (Comparative Example 1), it can be seen that transparency and toughness are excellent, but adhesion is insufficient and there is no carbon neutral eco-friendliness at all. Molded with a composition of polyethylene resin and polyolefin elastomer In the case of the polyethylene film wrap (Comparative Example 2), it can be seen that transparency, toughness, and adhesiveness are excellent, but there is no carbon neutral eco-friendliness at all. In addition, in the case of a polyethylene film wrap made of a composition of micro-inorganic particles and polyethylene resin (Comparative Example 3), it can be seen that the carbon-neutral eco-friendliness is good, but transparency, toughness, and adhesion are very poor. In the case of a polyethylene film wrap formed from a composition with an elastomer (Comparative Example 4), it can be seen that although it is excellent in carbon neutrality and eco-friendliness, transparency, toughness, and adhesiveness are very poor.

As described above, the polyethylene film wrap according to the present invention has excellent transparency, toughness, and adhesion, and not only has excellent recyclability upon disposal, but even if it is not recycled and is incinerated, the amount of carbon dioxide generated is reduced by the amount of nano-inorganic particles filled, corresponding to carbon neutrality. You can see that this is possible.

Claims (16)

10 to 70% by weight of nano inorganic particles, 20 to 80% by weight of polyethylene resin, 3 to 20% by weight of polyethylene-based copolymer containing carboxylic acid groups, 1 to 30% by weight of polyolefin elastomer, and 1 to 10% by weight of A carbon-neutral, eco-friendly polyethylene film wrap made of a resin composition composed of quicklime particles. According to paragraph 1,
A carbon-neutral, eco-friendly polyethylene film wrap wherein the nano inorganic particles have an average particle diameter of 1 to 500 nm. According to paragraph 1,
The inorganic nano particles include calcium carbonate, talc, clay, kaolin, silica, diatomaceous earth, magnesium carbonate, calcium chloride, calcium sulfate, barium sulfate, aluminum hydroxide, zinc oxide, magnesium hydroxide, titanium oxide, alumina, mica, and asbestos. A carbon-neutral, eco-friendly polyethylene film wrap made of one or more selected from powder, zeolite, clay silicate, and mixtures thereof. According to paragraph 1,
The polyethylene resin is a carbon-neutral eco-friendly polyethylene film wrap wherein the polyethylene resin is at least one selected from the group consisting of low-density polyethylene, linear low-density polyethylene, medium-density polyethylene, and high-density polyethylene. delete According to paragraph 1,
The polyethylene-based copolymer containing a carboxylic acid group is a carbon-neutral, eco-friendly polyethylene film wrap that is a polyethylene-based copolymer containing methacrylic acid or acrylic acid. delete According to paragraph 1,
A carbon-neutral, eco-friendly polyethylene film wrap wherein the quicklime particles have an average particle diameter of 0.01 to 100㎛. delete delete According to paragraph 1,
The polyolefin elastomer is a carbon-neutral, eco-friendly polyethylene film wrap, which is a polyethylene-based elastomer or polypropylene-based elastomer. delete According to clause 1,
The resin composition is a carbon-neutral, eco-friendly polyethylene film wrap that further contains polybutene. According to clause 13,
A carbon-neutral, eco-friendly polyethylene film wrap containing 1 to 10% by weight of polybutene. In paragraph 1.
A carbon-neutral, eco-friendly polyethylene film wrap, wherein the polyethylene film wrap is obtained by upward blown film molding or T-die casting film molding of a resin composition. In paragraph 1.
A carbon-neutral, eco-friendly polyethylene film wrap in which the polyethylene film wrap is a single-layer or two-layer or more multi-layered film.