KR100807512B1 - Coating Agent for Fruit Packaging/Fruit Bagging Paper Using Petrochemical By-product - Google Patents

Abstract

The present invention relates to a fruit land / fruit packaging material using a petrochemical by-product which gives the fruit land / fruit packaging material excellent water repellency, ultraviolet absorption and visible ray permeability, wet tensile strength, and durability to mold, and has an average molecular weight. The present invention relates to a coating composition for oil-based fruit paste / fruit packaging material containing 50-50 parts by weight of low molecular weight polyolefin wax of 10,000 or less and 30-50 parts by weight of paraffin wax, and a paraffin wax and low molecular weight polyolefin in a coating composition for fruit paste / fruit packaging material. The wax provides relatively good water repellency and thermal stability, respectively.

Fruit paste, fruit packaging material, coating agent, polyolefin wax, paraffin wax            

Description

Coating Agent for Fruit Packaging / Fruit Bagging Paper Using Petrochemical By-product}

The present invention relates to a fruit land / fruit packaging material using a petrochemical by-product which gives the fruit land / fruit packaging material excellent water repellency, ultraviolet absorption and visible ray permeability, wet tensile strength, and durability to mold, and has an average molecular weight. The present invention relates to a coating composition for oil-based fruit paste / fruit packaging material containing 50-50 parts by weight of low molecular weight polyolefin wax of 10,000 or less and 30-50 parts by weight of paraffin wax, and a paraffin wax and low molecular weight polyolefin in a coating composition for fruit paste / fruit packaging material. The wax provides relatively good water repellency and thermal stability, respectively.

The present invention relates to an oil-based mixture of low molecular weight polyolefin waxes, which are not fractionated by molecular weight, obtained as by-products from polymerization plants of polyolefins such as polyethylene and polypropylene, with paraffin waxes compatible with them. It relates to a fruit composition / coating composition for fruit packaging material.

Fruit land is mainly used for fruits with high added value. Specifically, deciduous fruits are used for apples, pears, persimmons, etc., and fruit lands are used for fruits and vegetables. There is no accurate statistical data on the market status of domestic fruit lands, and papers suitable for each function of fruit are imported or some lands are manufactured. Currently, the fruit land currently used in Korea is considered to be about 200 tons per year and is highly dependent on foreign countries. The conventional oil-based oil-based coating agent imported from Japan is mainly paraffin wax type, and it is a fact that a large amount depends on imports, considering that the annual output of fruit earth coating agent produced in Korea at the scale of 100 tons per year is 50 ton. . Paraffin wax, which is a conventional oil-based oil coating for fruit, has excellent disadvantages of water repellency but low melting point, resulting in poor thermal stability.

On the other hand, low molecular weight polyolefin waxes are olefin oligomers having an average molecular weight of 500 to 10,000, and there are three types of preparations: polymerization of olefins, decomposition of high molecular weight polyolefins, and separation of oligomers, which are by-products in the production of high molecular weight polyolefins. According to the manufacturing method, different things such as density, ignition point and hardness are obtained. Either way, they have similar physical and chemical properties to polymeric polyolefins, while having low melt viscosity and good compatibility with waxes and resins. In addition, low molecular weight polyolefin wax is a low molecular weight that is easily melted, glossy, slippery and plastic, and is burned for steam production or recycled to a naphtha cracking tank and cracked with ethylene.

      In the present invention, a paraffin coating is prepared using a low molecular weight polyolefin wax (wax), which is not fractionated by molecular weight, obtained as a byproduct in a polymerization plant of polyolefins such as polyethylene and polypropylene. Its purpose is to provide an oil-based coating composition having superior water repellency but lower cost of raw materials and better thermal stability than a wax coating agent.

In general, low molecular weight polyolefins obtained as a by-product of petrochemical plants are nonpolar waxes composed of hydrocarbons, which are hardly soluble in solvents at room temperature but are soluble in chlorine-based solvents such as hydrocarbon solvents and tricylene when heated. Polymers have no compatibility but are compatible with other oligomers such as petroleum resins, polybutenes, paraffin waxes, carnava waxes, linoleum anhydrous and linseed oils, as well as excellent electrical properties like paraffins. Has characteristics. Low molecular weight polyolefin wax has excellent cold resistance, water resistance, chemical resistance and abrasion resistance, and has a high melting point, so that it can be added to other waxes in small amounts to improve their properties, and also plasticizers, plastic dispersants, electrical insulating oils, lubricants, adhesives It is also applicable to sex additives and coatings.

      Low molecular weight polyolefin waxes with commercially available average molecular weights of 10,000 or less are fractionated by molecular weight, and there are no examples of applying low molecular weight polyolefin waxes not classified by molecular weight as fruit paste coating compositions.

      The present invention utilizes the above-mentioned petrochemical by-products, low-molecular weight polyolefin wax, which is an petrochemical by-product that replaces paraffin wax, which is a conventional oil-based coating material of conventional fruits, and is recycled as a coating material for various fruit pastes / fruit packaging materials having low cost. It provides an oily coating composition of a mixture of low fraction, low molecular weight polyolefin waxes and paraffin waxes with excellent thermal stability and cost savings.

The present invention relates to an oil-based coating composition using petrochemical by-products, and is an oil-based coating composition mixed with low molecular weight polyolefin wax and paraffin wax derived as a by-product from a petrochemical plant.

      The present invention relates to a fruit land / fruit packaging material using a petrochemical by-product which has a fruit land / fruit packaging material having excellent water repellency, ultraviolet absorbency and permeability to visible light, wet tensile strength, and mold resistance, and has an average molecular weight of 10,000. Alcohol-based coupling agents such as low molecular weight polyolefin waxes, paraffin waxes, n-propanol or n-butanol, which are not fractionated by molecular weight, which can be selected from olefin homopolymers such as ethylene, propylene, 1-butene or copolymers thereof And an antimicrobial coating composition comprising 50-70 parts by weight of low molecular weight polyolefin wax, 30-50 parts by weight of paraffin wax, 0-10 parts by weight of coupling agent and 0-10 parts by weight of antibacterial agent, which are not fractionated by the molecular weight. The present invention relates to a coating composition for oily fruit land / fruit packaging material. Paraffin waxes and low molecular weight polyolefin waxes included in the coating composition provide relatively good water repellency and thermal stability of fruit land / fruit packaging materials. Therefore, while giving excellent water repellency, ultraviolet absorbency, and wet tensile strength to the fruit land / fruit packaging paper similar to the conventional paraffin wax only as a coating agent, the improved thermal stability, mildew to mold It gives durability, surface uniformity, etc. to fruit land / fruit packaging.

      The present invention will be described in detail as follows.

      50 to 70 parts by weight of low molecular weight polyolefin waxes and 30 to 50 parts by weight of paraffin wax, which are not classified by molecular weight, which may be selected from olefin homopolymers such as ethylene, propylene, 1-butene or the like and copolymers thereof having an average molecular weight of 10,000 or less. And melted by the following heat, and mixed together by adding 0-10 parts by weight of an alcohol-based coupling agent such as n-propanol or n-butanol and 0-10 parts by weight of an antimicrobial agent to prepare a coating composition for oily fruit paste / fruit packaging. Manufacture.

Comparative Example 1

      Commercial paraffin wax: Nippon Seiro EP-3000

The measurement of the coating properties of the oil-based coating composition of the present invention using a low molecular weight polyolefin wax which is a petrochemical by-product was carried out as follows.

Using the oil-based coating composition of the present invention and the oil-based coating agent of Comparative Example 1, the roll gap of 30 μm and 70 μm and the roll rotation speed of 100, 150 and 200 rpm were set and coated on the thin paper in the roll coater. The water repellency, UV absorption and visible light transmittance, wet tensile strength, surface uniformity, coating permeability and heat resistance (melting point) of each coated leaf paper were respectively measured by dynamic contact analyzer (Cahn, DCA315), UV-visible spectrophotometer (SHIMADZU, UV-1601PC), texture analyzer (Stable Micro System, TA-HD 500), SPM (Digital Instrument, Nanoscope IIIa), optical microscope (Olympus, BX60) and DSC (Dupont, 2000 Thermal Analyzer), respectively. Durability was measured by inoculation with the standard fungus ( Aspergillus Terreus ).

In Table 1,? Indicates satisfaction,? Indicates a medium level, and × indicates a failure.

Table 1

 Test Items The present invention  Comparative Example 1  Test Methods  Water repellency UV absorption Wet tensile strength Surface uniformity Permeability Heat resistance Mold durability  ◎ ◎ ◎ ◎ ◎ ◎ ◎  ◎ ◎ ◎ △ △ × ×  Dynamic Contact Angle UV-VIS TA SPM Optical Microscope DSCAspergillus Terreus

The properties of the coating film of the fruit land / fruit packaging paper coated with the oil-based coating composition of the present invention using a low molecular weight polyolefin wax which is a petrochemical by-product show the following characteristics.

1) The oil-based coating composition of the present invention uses a low molecular weight polyolefin wax as a by-product of a petrochemical plant as a raw material, and is less expensive than using a conventional paraffin wax.

    2) The oil-based coating composition of the present invention has a higher melting point than when using only conventional paraffin wax as a coating agent, thereby providing thermal stability to fruit land / fruit packaging.

    3) The oil-based coating composition of the present invention gives greater durability against mold on fruit land / fruit packaging than when using only paraffin wax as a coating agent.

    4) The oil-based coating composition of the present invention gives greater uniformity and permeability to the surface of the fruit land / fruit packaging paper than when only the conventional paraffin wax is used as the coating agent.

    5) The oil-based coating composition of the present invention imparts excellent water repellency, ultraviolet absorbency and wet tensile strength to the fruit substrate / fruit packaging similar to those using only conventional paraffin wax as a coating agent.

      Therefore, the oil-based coating composition of the present invention is further improved as described above various coating properties when using only conventional paraffin wax as a coating agent is suitable for the surface coating of various fruit paste / fruit packaging paper and the like.

Claims (2)

The present invention relates to an oil-based coating composition applied to the surface of fruit land / fruit packaging using petrochemical by-products, and has an average molecular weight of 10,000 or less and an molecular weight that can be selected from olefin homopolymers such as ethylene, propylene, and 1-butene or copolymers thereof. In the coating composition consisting of an alcohol-based coupling agent and an antimicrobial agent, such as low molecular weight polyolefin wax, paraffin wax, n-propanol or n-butanol, which are not fractionated, 1) low molecular weight polyolefin wax 50-70, which is not fractionated by molecular weight. Parts by weight, 2) 30-50 parts by weight of the paraffin wax, 3) 0-10 parts by weight of the coupling agent and 4) 0-10 parts by weight of the antimicrobial agent [1) to 4) is 100]. Characteristic oily coating composition A method for producing an oily coating composition applied to the surface of fruit land / fruit packaging using petrochemical by-products, which may be selected from olefin homopolymers such as ethylene, propylene, 1-butene or the like or copolymers thereof having an average molecular weight of 10,000 or less 50-70 parts by weight of low molecular weight polyolefin wax and 30-50 parts by weight of paraffin wax, which are not fractionated by molecular weight, are respectively melted by heat of 120 ° C. or lower, and 0-10 parts by weight of alcohol, such as n-propanol or n-butanol. Process for producing an oily coating composition, characterized in that the coupling agent and 0-10 parts by weight of the antimicrobial agent is added and mixed.