KR920004619B1 - Self-tacking linear low density polyethylene film and production process thereof - Google Patents

Abstract

The polyethylene film consists of 100 wt. pts. of a base resin mixture obtained by mixing 90-80 wt.% linear low density polyehtylene with 5-20 wt.% of low density polyehtylene, 0-4 wt. pts. of petroleum resin, 2-10 wt. pts. of polybutene or polisobutene, 0.5-4 wt. pts. of cornoil, 0.4-2 wt. pts. of antistatic agent, 0.1-2 wt. pts. of weather-resistant UV interceptor, 1-6 wt. pts. of rust inhibitor, and 0.2-1 wt. pts. of a mixture comprising calcium fattyacid, aluminium fatty acid and zinc batty acid. The film has a good transparency, stretching property and self-adhesion.

Description

Self-adhesive linear low density polyethylene film and its manufacturing method

The present invention relates to a self-adhesive linear low-density polyethylene (LLDPE) film and a method of manufacturing the same. More specifically, the present invention relates to a self-adhesive linear low density polyethylene (LLDPE) film and a method of manufacturing the same. The present invention relates to a self-adhesive linear low density polyethylene film for packaging pallets which can be supplied and is easy to handle and which is harmless to humans. The large trees are packed in accordance with the modernization of the transportation by the intensive transportation method, in which a small amount of cargo is collected and stacked on a pallet, so that pallets, etc. are transported by a forklift, stacked and unloaded. Various packaging types are used depending on the contents, such as band packing, band packing, shrink packing, self-adhesive stretch packing, and combinations thereof, and the total cost is reduced by automation. It is a phenomenon that is changing.

However, at present, it is possible to cope with various changes in the size, height, weight, etc. of the cargo, and the pallet is transported by transporting the cargo on the pallet which is highly stable and easy to automate with the pallet by packing with a self-adhesive pallet stretch film. Stretch packaging is becoming mainstream.

The properties required for this film include self adhesiveness, good transparency, excellent elongation, cheap mass supply, easy handling and no harm to human body.

The present inventors have improved the manufacturing method of the non-toxic wrap film (Korean Patent Publication No. 87-7970, Japanese Patent Laid-Open No. 62-295927, and US Patent No. 4,837,262), which the inventors have invented previously, Succeeded in producing a film that is well suited for its packaging transportation methods, up to heavy cargo.

Currently, films made of PVC and EVA (ethylene vinyl acetate) are used as pallet stretch films, but they have many problems in strength, elongation, weather resistance, and defects such as generation of acid decomposition gases. It is true that the emergence of films that can protect islands (physically as well) has been expected.

From this point of view, the meaning of the appearance of the film containing the linear low density polyethylene of the present invention as a main raw material will be great.

The conventional self-adhesive film utilizes the adhesiveness of oxide which made the surface of PE (polyethylene) film high temperature, and formed the ultra-thin oxide film on the contact surface with the air of a die-lip.

However, according to this conventional method, not only the oxidized surface but also the inside is affected by the high temperature, so that deterioration of steel and elongation is inevitable, and a large amount of antioxidant is consumed, so its influence cannot be ignored. In addition, although a viscous liquid (polyisobutyrene) or the like was mixed in the polyolefin resin, it was possible to produce a film having a slight adhesiveness, but the resin had a high strength and elongation, which was severely reduced in strength and elongation. The manufacture of the film was impossible.

The self-adhesive linear low density polyethylene film of the present invention has a petroleum resin of 0-4 parts by weight, based on 100 parts by weight of a mixture of 5-20% by weight of low density polyethylene (LDPE) and 95-80% by weight of molded low density polyethylene, which is a main raw material, 2-10 parts by weight of polybutene or polyisobutylene, 0.5-4 parts by weight of corn oil, 0.4-2 parts by weight of antistatic agent, 0.1-2 parts by weight of weather resistant sunscreen, 1-6 parts by weight of rust preventive agent, fatty acid calcium, fatty acid aluminum And 0.2-1 parts by weight of fatty acid zinc.

As described above, in the production of the self-adhesive linear low-density polyethylene film of the present invention, an antistatic agent, a weather resistant sunscreen and a rust preventive agent is added, which is antistatic when used in the presence of flammable gas, depending on the intended use. This is to enhance weather resistance, UV resistance for long periods of unattended storage, and rust resistance for metals such as steel when mainly exported.

The characteristics of the self-adhesive linear low density polyethylene film of the present invention prepared as described above can be easily migrated to the added adhesive to the surface and deteriorated the performance retained by the resin without deteriorating the performance retained by the resin. Edible oil, especially corn oil, is used as a transition aid to produce a cohesive, high-strength elongation film, and the petroleum resin (ordinary temperature solid) has high adhesion fixability in order to make the self-adhesive film easy to peel off, and resin (LLDPE) The increase of elongation is attained by the addition amount which increases the elongation of.

Example 1-4

Each film was prepared according to the ratio (wt%) of Table 1 below.

TABLE 1

(Note) F or less is the value (weight part) with respect to 100 weight part of said A-E.

Equipment: 65m / m, L / D28, two-stage double shaft winding machine (1.5 times stretching is possible)

Dies: 250m / m round, 300m / m round, 350m / m round (dieleaf 1.75m / m)

[Molding temperature condition of extruder]

In Table 1 above,

A: Linear Low Density Polyethylene (LLD-PE)

Japanese Idemis Sekiyu Kaga Co., Ltd. product

(Grade: 0134N)

B: linear low density polyethylene (LLD-PE)

Novaco Chemicals, Canada (Grade: GF 0118-A)

C: Linear Low Density Polyethylene (LLD-PE)

Saudi Arabia Axon Chemical Eastern Products

(Class: Escorene LL 1030 YV)

D: Linear Low Density Polyethylene (LLD-PE)

Hanyang Chemical Co., Ltd. (Grade: 3120)

E: Low Density Polyethylene (LD-PE)

Hanyang Chemical Co., Ltd. (Grade: 5316)

F: Polybutene:

Nippon Sekiyu Kagaku Co., Ltd. (Niseki Polybutene)

G: Petroleum Resin (Aragawa Kagaku Kogyo Co., Ltd.)

H: Corn oil (made by Seoul Heinz)

I: Antistatic Agent: Polyhydric Alcohol Fatty Acid (C ₁₂ -C ₁₈ ) Ester, Japan Marubishi Yuka Kogyo Co., Ltd. (Denon-2220)

H: UV-protective agent: Z-hydroxy-4-n-octoxy benbophenone, product of Kyoku Yakuhin Co., Ltd. (Bishop 130)

J: Antirust agent: Organic amine, fatty acid salt type

Japanese Marubishi Yuka Koyokyo Co., Ltd. (Denon-2605MB)

The 50 rolls of the film | membrane of the 1150m / m diameter fold | folded on the conditions of the said Table 1, and the 4 rolls of width were obtained.

In addition, these elongation is shown in Table 2 below.

TABLE 2

In addition, Table 3 shows the defects (deviation of transverse longitudinal strength and elongation due to BUR (expansion ratio)).

[Table 3] Change in strength elongation due to the same compounding ratio width shift

In Table 3, some errors are recognized by the change in thickness and the change in the frost-line, but in addition to the change in strength elongation due to blending, the orientation of the molecular chain and the width, length, It can be seen that a sudden change in direction also has a direction regularity.

As described above, not only the surface property of the resin film by blending is improved, but also the conditions of workability are adjusted together with the necessary elongation of high elongation and high strength to produce a film having the necessary adhesion.

Claims (2)

Petroleum resin, 0-4 parts by weight, polybutene or polyisobutylene 2 -10 parts by weight, corn oil 0.5-4 parts by weight, polyhydric alcohol fatty acid (C ₁₂ -C ₁₈ ) ester antistatic agent 0.4-2 parts by weight, 2-hydroxy-4-n-octoxy benzophenone as weather resistant UV inhibitor A self-adhesive linear low density polyethylene film prepared by adding 0.1-2 parts by weight, organic amine, 1-6 parts by weight of fatty acid-based rust preventive agent, and 0.2-1 parts by weight of fatty acid calcium, aluminum fatty acid, and fatty acid zinc. Petroleum resin, 0-4 parts by weight, polybutene or polyisobutylene 2 -10 parts by weight, corn oil 0.5-4 parts by weight, polyhydric alcohol fatty acid (C ₁₂ -C ₁₈ ) ester antistatic agent 0.4-2 parts by weight, 2-hydroxy-4-n-octoxy benzophenone as weather-resistant UV inhibitor A method for producing a self-adhesive linear low density polyethylene film prepared by adding 0.1-2 parts by weight, organic amine, 1-6 parts by weight of a fatty acid-based rust preventive agent, and 0.2-1 parts by weight of fatty acid calcium, aluminum fatty acid and fatty acid zinc.