KR100790772B1 - Packaging paper containing citrus foil pulp - Google Patents

Abstract

The present invention relates to a packaging paper containing pulp extracted from citrus foil, specifically citrus foil pulp extracted from citrus peels such as citrus fruits, lemons, oranges, dogs, Hallabong and wood pulp 20 ~ 20% It is characterized in that the pulp composed of 95% by weight, prepared by mixing an additive consisting of one or two or more mixtures selected from a sizing agent, antifoaming agent, retention agent, strength enhancing agent.

The packaging paper containing the citrus fruit pulp of the present invention is excellent in strength and exhibits color, pattern, and aroma due to the citrus fruit pulp, and thus, a luxury and durable packaging box can be manufactured, and the packaging paper of the present invention is a citrus fruit processing process. By recycling the waste generated from the waste, the production cost of packaging paper can be lowered and environmental pollution can be reduced.

Description

Packing paper containing citrus foil pulp {Packing Paper Comprising Pulp of Citrus Peel}

The present invention relates to a packaging paper comprising a pulp extracted from citrus gourd, specifically, pulp extracted from citrus peels such as citrus, lemon, orange, canine, Hallabong and wood pulp, and prepared packaging Paper is used in the manufacture of packaging boxes as corrugated cardboard and liner paper of corrugated cardboard.

Citrus fruits, including citrus fruits and oranges, are eaten at home and are used as raw materials for various processed foods, including beverages. Some of the shells produced are used as ingredients of Chinese medicine or feed for livestock, but only a fraction of them are discarded as they are, and some are illegally dumped to pollute the environment. Therefore, it is necessary to find ways to reduce the causes of pollution on land and sea and to create new added value by reusing citrus peels.

As one of such methods, the present inventors have provided a method of manufacturing Hanji by extracting fibers from citrus foils and mixing them with mulberry fibers in a paper containing Korean Patent No. 669109 citrus foil fibers prior to the present invention. Hanji according to the above technology has the advantage of excellent strength, moisture permeability, shelf life and low cost, but it is difficult to mass production because it requires manual processes to produce high-quality products, and thus the consumption of citrus peel was limited.

On the other hand, as the amount of logistics increases, the demand for packaging boxes is steadily increasing, and the types thereof are gradually increasing. Packaging boxes are generally made of corrugated paper because of their high strength. However, when using general wood pulp, the strength of the packaging paper is high but the cost is high. In case of using recycled paper pulp, The cost is low but the quality is poor.

 Accordingly, the present inventors provide a method for manufacturing a packaging paper using pulp extracted from citrus fruit foil, thereby providing a packaging paper that can be satisfied in terms of cost and strength while consuming large amounts of citrus peel.

An object of the present invention is to provide a high quality packaging paper having excellent strength, beautiful color, pattern and aroma by using pulp prepared from discarded citrus foil as a packaging paper material.

Another object of the present invention is to reduce the cost of packaging paper as well as environmental pollution by recycling the waste generated in the citrus processing.

The packaging paper containing the citrus foil pulp of the present invention is characterized in that the pulp and wood pulp prepared from the peel of citrus fruits such as citrus, lemon, orange, dog, Hallabong, and the wood pulp, the packaging paper of the present invention It can be used as a core or liner of the manufacturing box for packaging.

For reference, in the present invention, citrus fruits refer to citrus fruits such as citrus fruits, lemons, oranges, dogs, and Hallabong, and citrus fruit pulp refers to pulp extracted from citrus peels such as citrus fruits, lemons, oranges, dogs, and Hallabong. .

The manufacturing process of the packaging paper of the present invention is largely composed of the manufacturing step of the citrus foil pulp and the manufacturing step of the paper, the manufacturing step of the citrus foil pulp is raw material preparation step, cooking step, dusting and selection step, washing and concentration step The paper manufacturing step is made of a pulp mixing and dissociation step, beating step, chemical addition step, selection and papermaking step, pressing and drying step, calendar ring and cutting step.

In the manufacturing step of citrus foil pulp, in the raw material preparation step, impurities contained in the peel of citrus fruits are removed and washed with water.

In the cooking stage, the citrus gourd ingredients are put in an aqueous sodium hydroxide solution and boiled. At this time, if the concentration of the sodium hydroxide solution is too low or the boiling time is too short, the cooking becomes incomplete, and if the concentration of sodium hydroxide is too high or the boiling time is too long, the fiber goes to the fiber. Since the strength and yield of the pulp may be reduced due to damage, it is preferable to cook for 20 to 50 minutes with 2 to 5% by weight aqueous sodium hydroxide solution.

In the dust removal and selection process, the centrifugal vibration remover removes foreign substances mixed in the fibers and evens the fibers.

In the washing and concentrating step, the fiber is washed with water and dehydrated to remove chemicals and the fiber is concentrated to produce citrus foil pulp.

In the pulp mixing and dissociation step in the paper manufacturing step, the citrus foil pulp and wood pulp are mixed and dissociated. If the amount of the citrus foil pulp is too small, the citrus flavor and color cannot be expressed and the effect of cost reduction is reduced. If the mixing amount of the citrus fruit pulp is too large, the strength of the paper may decrease, so it is preferable to mix the citrus fruit pulp 5 to 80% by weight and the wood pulp 20 to 95% by weight. In this case, the wood pulp means a conventional paper pulp for paper manufacturing, in particular, by selecting the recycled paper pulp among the wood pulp can further lower the cost.

In the beating step, the mixed and dissociated pulp is beaten using a refiner.

In the chemical addition step, additives are mixed as necessary to give characteristics according to the purpose of use of the paper.The additives are selectively mixed with chemicals such as size agent, strength enhancer, retention agent, antifoaming agent, dye, etc. as necessary. If the amount of the additive is too large, the cost is unnecessarily increased, and if the amount is too small, the desired properties cannot be obtained. Therefore, it is preferable to add it within the range of 0.1 to 2 parts by weight based on 100 parts by weight of the dry weight of the pulp.

In the selection and papermaking step, the pulp is evenly picked, foreign matters are removed, and papermaking is carried out in the form of paper.

In the pressing and drying step, the paper is compressed, dehydrated and dried.

In the calendar ring and cutting step, the thickness of the paper is uniformed and the sheet is cut in the form of a roll to produce a wrapping paper.

The packaging paper produced through the above process is characterized by excellent citrus fruit color, pattern, and aroma, including citrus foil pulp, and thus has high strength. It can manufacture.

The packaging paper containing the citrus fruit pulp of the present invention is excellent in strength and exhibits color, pattern, and aroma due to the citrus fruit pulp, thereby making it possible to manufacture a luxurious and durable packaging box. In addition, the packaging paper of the present invention recycles the waste generated in the citrus processing, thereby reducing the production cost of the packaging paper and at the same time reducing the environmental pollution.

Comparative Example 1

The paper pulp was mixed and dissociated, and after beating using a refiner, 5 g of the size agent and 5 g of the defoaming agent were added per 1 kg of pulp. The prepared pulp was uniformly removed and foreign matters were removed and then papermaking was carried out in the form of a paper. After pressing and dehydrating and drying, the thickness of the paper was uniformly calendered and cut, and then rolled in the form of a roll to prepare a comparative packaging paper 1.

Example 1

[Step 1-1] Preparation of Citrus Foil Pulp

Prepare citrus peel, remove impurities, wash with water, add to 5% by weight aqueous sodium hydroxide solution and cook for 30 minutes, remove the foreign matter using a centrifugal decanter and select, wash with water Dehydration yielded citrus foil pulp.

[Step 1-2] Preparation of Paper

The citrus foil pulp 25% by weight and the paper pulp 75% by weight were mixed, dissociated, and beaten using a refiner, and then 5 g of size agent and 5 g of antifoam were added per 1 kg of pulp. After preparing the pulp evenly and removing foreign matters and papermaking in the form of paper, press dewatering and drying, uniformly calendered and cut the thickness of the paper and then wound in the form of a roll to prepare a packaging paper 1.

Example 2

[Step 2-1] Preparation of Citrus Foil Pulp

Citrus fruit pulp was prepared in the same manner as in Example 1-1.

[Step 2-2] Preparation of Paper

In Example 1-2, the packaging paper 2 was prepared in the same manner, except that 80% by weight of citrus foil pulp and 20% by weight of paper pulp were mixed and dissociated.

The thickness and density of the packaging paper according to the above example were measured, and the results are shown in Table 1.

TABLE 1

division Citrus Foil Pulp Content (wt%) Basis weight (g / ㎡) Thickness (㎛) Density (g / cm 3) Volume (cm 3 / g) Comparative Wrapping Paper 1 0 82.5 13.7 6.02 0.17 Packing paper 1 25 81.3 15.5 5.25 0.19 Packing paper 2 80 69.1 16.4 4.21 0.24

As shown in Table 1, as the citrus fruit pulp is mixed, the basis weight gradually decreases and the thickness gradually increases, resulting in a decrease in density. Since the thickness can be adjusted in the papermaking stage, it was judged that the production cost could be effectively lowered if the appropriate level of strength was given to the packaging paper prepared by mixing citrus fruit pulp.

Paper strength is mainly determined by the bond strength between the fibers and the strength of the fibers themselves, which is an important indicator in determining the resistance and durability to physical force, and thus is a very important factor in the quality of packaging papers such as the present invention. Therefore, the properties related to the strength of the paper for the packaging paper according to the embodiment TAPPI Stasdard T200 om-83, TAPPI Stasdard T494 om-81, TAPPI Stasdard T403 om-85, TAPPI Stasdard T414 om-82, TAPPI Stasdard T511 It was measured according to om-83, and the results are shown in Table 2.

TABLE 2

 division Bedding (km) Elongation (%) Bursting Strength (kPa · ㎡ / g) Tear strength (mN · ㎡ / g) Internal Theft (The Count) MD CD MD CD MD CD MD CD Comparative Wrapping Paper 1 11.6 9.9 2.08 2.42 1.7 11.8 10.5 40 15 Packing paper 1 13.2 10.4 2.52 3.2 1.7 14.9 12.5 32 6 Packing paper 2 11.7 9.81 1.31 3.8 1.4 14.8 11.4 29 6

Tensile strength is one of the most important strengths related to durability, in the present invention, in order to indicate the tensile strength corrected by basis weight, the tensile strength is referred to as thermal short. Tensile strength of MD / CD is improved compared to citrus foil pulp free branch, which is thought to be due to the adhesive component that connects the fiber of the citrus foil. Tensile strength did not increase with increasing amount, but tended to decrease, but maintained similar level to that without citrus fruit pulp. In addition, the bursting strength showed a slight tendency to fall when the citrus fruit pulp was contained in a large amount, and the tear strength was higher when the citrus fruit pulp was added. On the other hand, in the case of internal theft, the tendency to decrease gradually with the addition of citrus fruit pulp, but the internal theft is largely dependent on the basis weight, so it is considered that the basis weight is reduced, even if it contains citrus fruit pulp. It was judged to be sufficient for paper use.

Overall, the packaging paper containing the citrus foil pulp according to the present invention was found to have a level of strength suitable for the packaging paper, and among the above examples, the packaging paper 1 was determined to be the best in terms of physical properties.

Claims (3)

delete delete To 100 parts by weight of pulp consisting of 5 to 80% by weight of citrus foil pulp and 20 to 95% by weight of paper pulp, It consists of 0.1 to 2 parts by weight of an additive consisting of a mixture of one or two or more selected from a sizing agent, an antifoaming agent, a retention agent, an intelligence enhancer, After dissociating and beating the pulp, the additives are mixed with the pulp, the foreign matter is removed, and the paper is made in the form of paper, the paper is compressed, dehydrated and dried, uniformly calendered and cut and then rolled. Manufactured by winding in form, The citrus foil pulp is prepared by removing the citrus peel, washed with water, and then added to 2 to 5% by weight aqueous sodium hydroxide solution and cooked for 20 to 50 minutes, and then using the centrifugal vibration damper After removal and selection, the box packaging paper, characterized in that it was prepared by washing with water and dehydration.