KR100593471B1 - Dyed Food Pulp Container - Google Patents

Abstract

The present invention is to dye the pulp by a known method in coloring the dye of the desired color on the pulp, and then dyeing the pulp by adding a dye and then adding an oil-resistant agent, a fixing agent, a sizing agent and then adding an antifoaming agent or alum It relates to a method of dyeing pulp containers. After pulverization and dissociation by adding predetermined pulp and purified water to the pulp, the pulp adjusted to the optimum high degree of evaporation suitable for molding in the pulverizer is diluted with an appropriate amount of white water, adjusted to a constant pulp concentration and stirred by adding dye. And, adding the oil-resistant agent, the fixing agent, and the sizing agent to sufficiently stir, adding the antifoaming agent or alum to the previously beaten pulp liquid, and mixing the pulp with paper, dehydrating, shaping, and taking out the pulp. Consists of.

The pulp container of the present invention has excellent oil resistance and flame resistance in terms of functionality, no foaming in terms of working process, no dye elution in white water, and additional chemicals in terms of merchandise. There is no staining or staining on the exterior of the container without the injection, and the appearance is good. Even if the high-temperature contents (rice) are stored in the container, there is no change in color. Therefore, the present invention can provide a food container using natural pulp, as well as to provide a beautiful color and appearance of the conventional foamed plastic, and can be reused to prevent environmental pollution.

Description

Dried food pulp container {Food Container Using Dyed Pulp}

Figure 1 shows the ionic bond form of the dye and pulp.

The present invention relates to a dyed food pulp container, and more particularly, in the dyeing the dye of the desired color in the pulp, the dye, oil-resistant agent, fixing agent, size agent, antifoaming agent or alum in order to add and mix the functional The present invention relates to a pulp container capable of improving work convenience and marketability.

Conventionally, the use of disposable foamed plastics for food containers causes environmental pollution, so it is legally regulated, and the use of reusable pulp containers is being expanded. There is a difficulty in meeting consumer's diversified color needs for containers.

Conventionally, when the pulp is colored with a dye, stains appear due to bubbles, dyes in white water are eluted, and dyes are impregnated with the contents at 50 ° C. or more. In addition, there is a method of coating a color film on the pulp, but the dye is leaked from the container at a certain temperature or more, the film is detached over time is not suitable for use as a food container.

As a related art of the present invention, Korean Patent Laid-Open Publication No. 1999-83827 relates to a pulp container and a substitute material such as plastic using starch used as a substitute material for pulp containers and plastics by high temperature condensation of starch and synthetic resin. Korean Patent Laid-Open Publication No. 2000-67282 relates to a method for producing a naturally degradable disposable food container, which is made from vegetable fibers which are mixed by extrusion of vegetable fibers, soybean meal, starch, salt, and water. Korean Utility Model Application No. 20-222622 relates to disposable food containers manufactured from natural plant pulp to make food containers by compression molding by mixing reeds, grain adhesives, moisture, enhancers and waterproofing agents. Korean Patent Laid-Open No. 2001-54392 relates to a method for producing a classical pulp container using pulp or paper. The prior art is different from the present invention and the technical configuration is another bar.

In the present invention, when dyeing a pulp with a dye, first dyeing the pulp with a dye, then the oil-resistant, fixing agent, sizing agent and the usual additives, and then added to the antifoaming agent or alum, stains appear in the conventional pulp, dye in white water The purpose of the present invention is to provide a pulp container with excellent functionality and merchandise by resolving dissolution and soaking in the contents at high temperature.

In the conventional dyeing pulp, the biggest problem is that the dye is not bonded to the fiber and the aggregation of the functional drug (oil agent, fixing agent, size agent) in the form of sludge and staining occurs because the pulp is the original As anionic, it is easily combined with cationic functional chemicals (oil-resistant, fixative, and sizing agent) that are added during the process, and when anionic dye is added to the pulp as a complexing agent, it is partially bonded or aggregated in sludge form. It is believed that staining occurs in the final product after remaining in the form. This phenomenon was considered to be affected by the foam generated during the process was added to the nonionic antifoaming agent, but staining also occurred.

Therefore, in order to solve this problem, cationic dyes or cationic dyes containing a mixture of cations and anions are first introduced into the pulp to induce bonding with the pulp and other functional chemicals such as oil repellents and fixings. Second, after adding the sizing agents in order, the antifoaming agent or alum was added to confirm that no staining was generated and the present invention was completed.

The dyeing method of the pulp container of the present invention can be carried out as follows.

After adding predetermined pulp and purified water to the pulper, grinding and dissociating at room temperature for 10 minutes or more, more preferably 20 to 60 minutes, and adjusting the optimum degree of beating suitable for the molding machine in the beating machine, and the appropriate amount to the beaten pulp. Dilute with white water to adjust to a constant pulp concentration, add a dye and stir, add an oil-resistant agent, a fixing agent and a size agent to stir sufficiently, and add an antifoaming agent or alum to the previously beaten pulp liquid. Mixing, and papermaking, dewatering, shaping, and taking out the pulp liquid by a known method.

In the present invention, the pulp is pulverized and dissociated, and diluted with white water in the beaten pulp adjusted to 500 to 550 ml of the high degree of water so as to control the pulp concentration of 0.45 to 0.5%.

In the present invention, the dye used for dyeing the food container may be used in the cationic or anionic dyes alone, 0.01 to 5%, more preferably 0.5 to 3% by weight of the pulp. In addition, the dye may use a mixed dye in which the anionic dye and the cationic dye are mixed in a ratio of 1: 2 to 1 in an amount of 0.01 to 0.5%, more preferably 0.5 to 3%, based on the pulp weight.

In the present invention, after the dye is added to the pulp, a surfactant may be used to dye the pulp well. In the present invention, the surfactant may use 0.1 to 0.3% of the nonionic surfactant with respect to the pulp weight.

After the dye is added to the pulp, it is harmless to the human body, and any functional agent commonly used in the manufacture of the pulp container may be added. In the present invention, any one or more selected from an oil-resistant agent, a fixing agent and a size agent may be used as one example of such a functional drug. In the present invention, the content of such functional drugs is referred to by the prior art, so those skilled in the art can appropriately select and use a predetermined amount. As an example of the use amount of such a functional drug in the present invention, the oil-resistant agent may be 0.1 to 0.5% by weight of pulp, the fixing agent 0.1 to 0.5% by weight of pulp, and the size agent may use 0.1 to 1.0% by weight of pulp.

A pulp solution in which dyes and functional chemicals are added to the pulp is added to the pulp solution to prevent staining of the pulp. As an example of such a material in the present invention, an antifoaming agent or alum can be used, respectively, wherein the antifoaming agent may use 0.1 to 0.5% by weight of pulp, and alum may add 0.01 to 0.5% by weight of pulp.

In the above pulp, a pulp solution containing dyes, functional chemicals and antifoaming agents or alum is formed into a container of a predetermined shape by including papermaking, dehydration, molding, and taking out to obtain a pulp container dyed in a predetermined color. .

In the pulp container dyeing of the present invention, a pulp container dyed by the addition of pulp, dyes, functional drugs and antifoaming agent or alum with various components and contents is prepared. Dyed pulp containers can be obtained.

On the other hand, the present invention includes a food container dyed by the above-mentioned dyeing method.

Hereinafter, the present invention will be described by experimental examples, examples and test examples. However, these are only examples of the present invention and they do not limit the scope of the present invention.

Experimental Examples 1 to 5 Functional Chemicals and Dye Input Procedures

 Check the salt resistance of the pulp container according to the time of addition of functional chemicals (①; oil-proof agent, fixative, size agent), dye (②) and antifoaming agent (③), and the presence of stains and bubbles in the manufacturing process. In order to make the functional agent, oil-resistant (Dupont's product; Foraperle 321) 0.2 to 0.4% of pulp weight, fixer (Raisio Chemical; Superex 727-1) to pulp weight, 0.2-0.4%, size agent (Raisio Chemical) Product; Raisiofob 920) was added 0.3-1.0% by weight of pulp, dyes (Clear Orange and Bayer Orange) 0.1-0.5% by weight of pulp and defoamer (nonionic product) 0.1-0.3% by weight of pulp In order to prepare a pulp container by adding in the order and the order of the following Table 1, the salt resistance, process problems were tested and the results are shown in Table 1 below.

Table 1. Functional and process characteristics according to chemical injection order

division Input order Flameproof function Bubble Presence of stain Experimental Example 1 ①② Bad U U Experimental Example 2 ①②③ usually radish U Experimental Example 3 ①③② usually radish U Experimental Example 4 ②①③ Good radish radish Experimental Example 5 ②③① usually radish U

In Experimental Examples 1 to 5, the amount of the functional drug (oil agent, fixer, size agent), dye, and antifoaming agent was 3 concentrations (lowest, middle, highest) for each experimental example within the ranges exemplified above. For the pulp container prepared by dividing into, the salt-resistance functionalities were compared to the condition of salting after heating 50 ℃ soy sauce in a microwave oven. It was.

From the above results, it was confirmed that the addition of dyes, functional drugs, and antifoaming agents in the same order has a good effect on functionality and processability. In addition, staining phenomenon was not significantly different from the addition of 0.1%, 0.3%, and 0.5% of dye addition to the pulp weight, but staining was observed depending on the addition of the antifoaming agent. The antifoaming agent showed a difference in the amount of foaming when 0.1%, 0.2%, and 0.3% of the pulp weight was added. The higher the concentration, the less foaming was.

Experimental Example 6 Staining Phenomenon by Dye Type

In order to compare how the staining phenomenon of the pulp container differs according to the type of dyes, pulp containers were prepared in the same manner as above by obtaining cation and anionic dyes for each manufacturer.

Table 2. Comparison of staining phenomenon by dye type

division Kinds Dye addition amount Remarks 0.1% 0.3% 0.5% Clariant Cation × × × orange color Negative ion × △ ○ orange color Bayer Cation × △ ○ yellow Negative ion ○ ○ ○ yellow

 (×: no stain at all, △: some stain, ○: many stains)

From the above results, the cationic dye is combined with the anion of the pulp, but there is a difference depending on the amount added compared to the anionic dye, it can be seen that there is no stain or less.

Experimental Example 7 Inhibition Effect of Alum on Dyeing

In order to determine the degree of suppression effect of staining during the dyeing of pulp by the addition of alum, the weight of pulp was replaced with anti-foaming agent in place of antifoaming agent in the range of staining according to dye type and dye addition amount in Experimental Examples 1-6. 0.05% to 0.3% of the contrast was added to determine the effect of inhibiting staining during the production of pulp containers, and the results are shown in Table 3 below.

Table 3. Inhibition Effect of Alum on Dyeing

Alum input (%) 0.05 0.10 0.15 0.20 0.25 0.30 silver 20% 5% Good Mixed orange 30% 25% 5% Good Orange - - 10% 5% Good green - - 15% 5% Good Brown - - 30% 25% 5% Good

When the dye is added, the fixing rate of the dye is improved by the pH 4.5 to 6.5 of the pulp solution, and the functionality of the sized agent decreases when the amount of alum added is 0.3% or more, and the amount of addition of the alum increases according to the amount of dye added. As a result of several experiments through this experiment, it can be seen that staining is suppressed due to the addition of alum.

<Example 1>

700Kg of pulp (NBKP from Canada, Yeosu: 650%, pulp concentration: 3.5%) and 19,300Kg of purified water (pH: 6.8) were added to the pulper, followed by grinding and dissociation at room temperature for 20 to 60 minutes. DDR (Double Disk Refiner) to adjust to a high degree of 520ml suitable for the molding machine, and diluted to 125,833Kg white water in the beaten pulp, adjusted to 0.48% pulp concentration and cationic dye (Clariant; Cartasol Orange K3GL LIQ) was added to 0.3% of the pulp weight and stirred with the beaten pulp.

To the pulp solution containing cationic dye, oil-resistant (Dupont's product; Foraperle 321) 0.3% of the pulp weight was added to the pulp solution containing the cationic dye, mixed for 2-3 minutes, and a fixing agent (Raisio Chemical product; Superex 727-1) was added. 0.3% by weight of pulp was added and mixed for 2 to 3 minutes, and a functional agent was added to the mixture of 2 to 3 minutes by adding 0.5% of the size agent (Raisio Chemical; Raisiofob 920) to the pulp weight.

Antifoaming agent (solid product; nonionic) was added 0.2% by weight of pulp to remove air bubbles which may occur in the pulp liquid mixed with the above dye and functional chemical.

Then, the pulp solution containing the dye, the functional chemicals and the antifoaming agent was paper-making, dewatering, molding, and taken out in a molding machine to prepare a pulp container.

Figure 1 shows the ionic bond form of the dye and the pulp when the pulp container dyeing of the present invention.

<Example 2>

0.1% of the anionic dye by pulp weight (orange color made by Clariant), 0.2% of the oil-resistant agent by pulp weight, 0.2% of the fixing agent by pulp weight, 0.3% by weight of pulp, and 0.1% of antifoam by pulp weight A pulp container was prepared in the same manner as in Example 1, except for adding thereto.

<Example 3>

0.5% of the cationic dye by pulp weight (orange color from Clariant), oil-resistant agent by 0.4% by pulp weight, fixing agent by 0.4% by pulp weight, sizing agent by 1.0% by pulp weight, antifoaming agent by 0.3% by pulp weight A pulp container was prepared in the same manner as in Example 1 except for adding thereto.

<Example 4>

A pulp container was prepared in the same manner as in Example 2, except that 0.3% of the cationic dye and the anionic dye mixed with the same ratio of zwitterionic dye (Orange by Clariant) was added to the pulp weight.

Example 5

Except for adding cationic dye 0.3% to pulp weight (yellow by Bayer), oil resistant agent 0.4%, fixing agent to pulp weight 0.4%, pulp weight to pulp weight 1.0% and antifoam 0.3% to pulp weight In the same manner as in Example 1 to prepare a pulp container.

<Example 6>

A pulp container was prepared in the same manner as in Example 2, except that 0.3% of the cationic dye and the anionic dye mixed with the same ratio by the zwitterionic dye (yellow from Bayer) was added.

<Example 7>

A pulp container was prepared in the same manner as in Example 1, except that 0.01% of the alum was added to the pulp weight instead of the antifoaming agent.

<Example 8>

A pulp container was prepared in the same manner as in Example 1, except that 0.1% of the alum was added to the pulp weight instead of the antifoaming agent.

Example 9

A pulp container was prepared in the same manner as in Example 1, except that 0.5% of the alum was added to the pulp weight instead of the antifoaming agent.

<Test Example 1>

Six plate samples were prepared for the pulp containers prepared as in Examples 1 to 9, and functional tests (oil resistance, flame resistance) and process problems (foam generation, dye dissolution in white water) were performed as follows. Among the functional tests, oil resistance was found in Kit Reagent No. 5, 6, 7 and sesame oil were tested. Salt-resistant functionality was compared to the soaked state after heating 50 ℃ soy sauce in a microwave oven. In addition, the degree of foaming due to dyes was visually compared to process problems. The degree of dye elution in white water was measured by filtering white water on filter paper and comparing the color of white water.

Table 4. Testing Functional and Process Issues

division Functional Fairness Remarks Oil resistance Flameproof Bubble Dissolution degree Example 1 No infiltration No infection None None Cationic Example 2 No infiltration No infection None thimbleful Anionic Example 3 No infiltration No infection None None Cationic Example 4 No infiltration No infection None None Zwitterionic Example 5 No infiltration No infection None None Cationic Example 6 No infiltration No infection None thimbleful Zwitterionic Example 7 No infiltration No infection None None Cationic Example 8 No infiltration No infection None None Cationic Example 9 No infiltration No infection None None Cationic

<Test Example 2>

The pulp container prepared as in Example was subjected to the rice storage test, boiling water storage test in order to confirm the problem in use. In the rice storage test, the hot rice was packed in a cup-shaped specimen, wrapped in a wrap, and left. After comparing the color of the rice, the dye was not found to be eluted with the rice. The stove was operated for 5 minutes to compare the water color, but it was found that it did not elute.

<Test Example 3>

As a result of evaluating the state of the plate specimen after drying (normal temperature dehydration, heating dehydration, molding process) in the production line by preparing a plate specimen of the pulp prepared as in Example, moisture evaporation by drying in the plate specimen as the dye input is increased Although a small amount of color stains occurred during the process, lowering the dye input amount was not enough to cause a big problem.

<Test Example 4>

When the pulp container manufactured as in Example is used for food, the dye and the antifoaming agent or alum of the present invention can be obtained from Table 5, which is the result of a standard test requested by the Jeollabuk-do Institute of Health and Environment (2004.03.19) to confirm suitability from an authorized institution. It can be seen that pulp containers using the same are suitable for food containers.

Table 5. Test Report

Paper container for food Date of Manufacture Material specification Dissolution Standard Judgment PCBs arsenic heavy metal Fluorescent brightener Evaporation residue Formaldehyde Paper 2004.03.18 0 0.00 fitness Not detected 10.5mg / l 0.0 fitness Coating 2004.03.18 0 0.00 fitness Not detected 7.5mg / l 0.0 fitness

The pulp container of the present invention has excellent oil resistance and flame resistance in terms of functionality, no foaming in terms of working process, no dye elution in white water, and stain on the appearance of the container in terms of merchandise. The appearance is good because there is no phenomenon or dyeing phenomenon and there is no change of color even if the high temperature (rice) is stored in a container. Therefore, the present invention can provide a food container using natural pulp, as well as to provide a beautiful color and appearance of the conventional foam plastic, and can be reused to prevent environmental pollution.

Claims (8)

Add pulp and purified water to the pulper, grind and dissociate at room temperature for 20 to 60 minutes, dilute with pulverized pulp adjusted to 500 to 550 ml evaporation, and adjust to a pulp concentration of 0.45 to 0.5% by weight. 0.01-5% by weight of cationic dye or mixed dyes in which anionic and cationic dyes are mixed in a ratio of 1: 2 to 1 is added, and an oil-resistant agent, a fixing agent and a size agent are added and sufficiently stirred. After the addition of the antifoaming agent or alum to the previously beaten pulp solution, and then mixed, and then the paper pulp container for dyeing through the step of papermaking, dehydration, molding and taking out delete The food pulp container according to claim 1, wherein the antifoaming agent is added in an amount of 0.1 to 0.5% by weight of the pulp. The food pulp container according to claim 1, wherein the alum is used in an amount of 0.01 to 0.5% by weight of the pulp. The food pulp container according to claim 1, wherein the alum is added at a pH of 4.5 to 6.5 of the pulp solution. The food pulp container according to claim 1, wherein the dye is added and then the surfactant is added in an amount of 0.1 to 0.3% by weight based on the pulp weight. delete delete

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