KR100191735B1 - Foaming pulp composition having degradability - Google Patents
Foaming pulp composition having degradability Download PDFInfo
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- KR100191735B1 KR100191735B1 KR1019950008879A KR19950008879A KR100191735B1 KR 100191735 B1 KR100191735 B1 KR 100191735B1 KR 1019950008879 A KR1019950008879 A KR 1019950008879A KR 19950008879 A KR19950008879 A KR 19950008879A KR 100191735 B1 KR100191735 B1 KR 100191735B1
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
- D21H17/24—Polysaccharides
- D21H17/28—Starch
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/50—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by form
- D21H21/56—Foam
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- Biological Depolymerization Polymers (AREA)
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Abstract
발포성 수지로된 포장재료 또는 용기는 심각한 공해문제를 유발한다.Packaging materials or containers made of foamable resins cause serious pollution problems.
자연상태에서 분해되는 생분해성 포장재료를 만들기 위하여 셀룰로오스를 주성분으로 하는 펄프에 녹말을 가하여 발포시킴으로써 환경문제를 유발하지 않는 생분해성 포장용기 및 재료를 제조하였다.In order to make biodegradable packaging material that decomposes in nature, starch was added to the cellulose-based pulp and foamed to prepare biodegradable packaging containers and materials that do not cause environmental problems.
Description
본 발명은 발포성 펄프 및 이로 된 용기에 관한 것이다.The present invention relates to foamed pulp and a container therefrom.
일반적으로 폴리스티렌이나 폴리에틸렌으로 만들어지는 일회용 용기는 수분이나 화학 발포제를 플라스틱 수지에 첨가하고 열과 압력을 가하여 발포시킴으로써 필요한 용기나 단열재등으로 사용되어 왔다. 하지만 이러한 플라스틱 수지로 이루어진 발포성 물질은 썩지 않고 쉽게 분해가 안되기 때문에 심각한 환경 공해를 일으키고 있다.Generally, disposable containers made of polystyrene or polyethylene have been used as containers or heat insulating materials required by adding water or chemical blowing agents to plastic resins and foaming them by applying heat and pressure. However, the foamable materials made of such plastic resins cause serious environmental pollution because they do not rot and are not easily decomposed.
따라서 일회용 용기 제작뿐아니라 가종 제품의 포장용기 및 단열재 등으로 다양하게 사용될수 있는 용기의 재료가 요청된다. 펄프는 천연섬유로서 생분해성이므로 분해가 쉽게되어 환경공해를 일으키지 않는 장점이 있으나 셀룰로돋스를 주성분으로하는 화학식 펄프나 기계식 펄프, 그리고 재생 펄프는 수분이나 화학 발포제에 의하여 발포가 일어나지 않는 것이 그 특징으로 되어 있다.Therefore, the material of the container that can be used as a variety of packaging containers and insulation materials of household products as well as disposable containers are required. Pulp is a natural fiber that is biodegradable, so it is easily decomposed and does not cause environmental pollution.However, chemical pulp, mechanical pulp, and recycled pulp, which are mainly composed of cellulose, are not foamed by moisture or chemical blowing agents. It is.
따라서 본 발명의 목적은 펄프를 이용한 충격에 견딜수 있고 가벼운 일회용 스티로폴 대용품으로의 사용이 거의 불가능한 것처럼 여겨진 펄프 주성분에 발포가 쉽게 이루어 지는 제2의 첨가물을 가함으로서 내충격성도 있고 보온효과도 지니고 있는 발포성펄프를 제조하는 것이다. 또한 본 발명의 목적은 발포도를 조절할 수 있고 용도에 따른 물성 조절도 가능한 발포성 펄프를 제공하기 위한 것이다.Accordingly, an object of the present invention is to expand the foamed pulp having impact resistance and thermal insulation effect by adding a second additive which is easily foamed to the pulp main component which is considered to be almost impossible to use as a lightweight disposable styropol substitute. To prepare. It is also an object of the present invention to provide an expandable pulp capable of controlling the degree of foaming and also controlling the physical properties according to the use.
또한 본 발명의 목적은 펄프로된 생분해성 포장용기를 제공하기 위한 것이다. 본 발명의 이러한 목적은 녹말 또는 녹말을 주성분으로 하는 곡물로 된 발포성 입자가 부가된 펄프에 의하여 달성된다. 이러한 녹말 발포입자는 별도로 발포되어 펄프에 혼합될 수도 있고 발포되지 않은 상태에서 펄프 재료에 혼합된 뒤에 발포될 수도 있다. 녹말을 주성분으로하는 곡물은 밀, 쌀, 감자, 옥수수등을 예로 들 수 있다.It is also an object of the present invention to provide a biodegradable packaging container made of pulp. This object of the present invention is achieved by pulp to which starch or foamed particles of starch-based grains are added. Such starch foam particles may be separately foamed and mixed into the pulp or may be foamed after being mixed with the pulp material in the non-foamed state. Starch-based grains include wheat, rice, potatoes, and corn.
이러한 발포성 펄프 조성물을 틀에 넣어 가온가압한 뒤에 감압하여 발포된 포장용기로 만들 수 있다.The foamed pulp composition may be put into a mold and heated and pressurized to reduce the pressure and make the foamed packaging container.
여기에 사용될 수 있는 펄프는 화학식펄프, 기계식 펄프 또는 재생펄프일 수 있다.The pulp that may be used here may be chemical pulp, mechanical pulp or recycled pulp.
펄프를 잘게 부수어서 물에 용해를 시키고 각종 습부첨가제를 첨가한 후 탈수 과정과 건조과정을 거치게 된다.The pulp is crushed finely to dissolve in water and various wet additives are added, followed by dehydration and drying.
상기 발포성 펄프의 제법은 다음과 같다.The manufacturing method of the said foamable pulp is as follows.
먼저 건조 펄프를 물에 풀어 슬러쉬나 슬러리 상태로 만들어 준다. 이 과정에서 충분한 기계적인 분산작용을 시킴으로서 셀롤로오스 섬유를 완전히 물에 분해 시킨다. 그 다음 고해과정을 거쳐서 제지특성을 부여하고 각종 필요한 충전제, 사이즈제, 섬유 분산제, 배수 개선제등 첨가제를 투입한 후 제조공정으로 들어간다. 즉 지료분매장치와 헤드박스를 통과한 펄프를 금망부를 통과시켜 여기서 탈수가 이루어진다. 발포를 유발시키는 물질의 투입은 바로 이 공정에서부터 용도에 따라 이루어진다. 여기서 펄프성분과 녹말성분 발포제를 혼합하는 방법은 두가지로 분류할수 있다,. 먼저 펄프성분을 녹말성분과 공정 제조과정에서 혼합하고 최종 제조과정에서 발포 및 접착이 동시에 일어나게하는 방법이고 또하나는 펄프성분과 이미 발포가 이루어진 녹말성분을 각종 첨가제와 같이 혼합제조하여 만드는 방법이다.First, dry pulp in water to make a slush or slurry. In this process, cellulose fibers are completely decomposed into water by giving sufficient mechanical dispersion. After the beating process, papermaking properties are given, and various necessary fillers, sizing agents, fiber dispersants, drainage improvers, and the like are added to the manufacturing process. In other words, the pulp passed through the paper distributor and the head box is passed through the gold mesh, where dehydration takes place. The input of the material causing the foaming starts from this process according to the use. Here, the method of mixing the pulp component and the starch foaming agent can be classified into two types. First, the pulp component is mixed with the starch component in the process manufacturing process, and foaming and adhesion occur simultaneously in the final manufacturing process, and another method is to prepare and mix the pulp component and the starch component already foamed together with various additives.
이하 본 발명은 실시예에 의거 상세히 설명하면 다음과 같다. 그러나 본 발명의 실시예로 한정되는 것은 아니다.Hereinafter, the present invention will be described in detail with reference to Examples. However, it is not limited to the embodiment of the present invention.
[실시예 1]Example 1
건조 펄프를 물에 풀어서 슬러쉬나 슬러리 상태로 만들었다. 이 과정에서 충분한 기계적 분산작용을 시킴으로서 셀룰로오스 섬유를 완전히 물에 분해 시켰다. 그다음 고해과정을 거쳐서 제지특성을 부여하고 Al2(SO4)3와 PAM(폴리아크릴아미드)를 각각 1% 투입하였다. 즉 지료분매장치와 헤드박스를 통과한 펄프를 금망부를 통과시켜 여기서 탈수가 이루어지도록 하였다. 여기서 85%의 탈수가 이루어지도록 하고 탈수정도는 용도에 따라 조절하였다.The dry pulp was dissolved in water to make a slush or slurry. In this process, the cellulose fibers were completely decomposed into water by giving sufficient mechanical dispersion. Then, after papermaking, papermaking characteristics were given and 1% of Al 2 (SO 4 ) 3 and PAM (polyacrylamide) were added. In other words, the pulp that passed through the paper distribution device and the head box was passed through the gold mesh to allow dehydration. Here, 85% dehydration was to be made and the degree of dehydration was adjusted according to the use.
탈수가 이루어진 펄프에 직경 2-3 ㎝ 크기의 둥근원형의 발포가 이미 이루어진 녹말 주성분의 발포체를 기계적인 혼합에 의해서 잘 섞었다. 녹말성분과 발포성분의 용량비율을 용도에 따라 다양하게 조절할수 있고 여기서는 녹말/펄프(20/80중량 비율)로 하여 제조하였다. 이때 여기에 액상형태의 녹말 접착제 5중량%를 소량의 고지와 같이 혼합하고 방부제, 방습제등의 첨가제를 첨가하여 계면상의 접착이 잘 이루어지도록 하였다. 고온, 고압프레스를 이용하여 15분동안 온도를 120℃로 압력을 2기압 가하여 펄프성분의 수분을 95%이상 제거하고 크기 50㎝ x 50㎝ x 0.7㎝ 크기의 녹말 펄프 발포 복합체를 제조하였다. 이루어진 복합체의 내부구조를 보면 다음 그림1과 같다. 이렇게 만들어진 펄프와 녹말발포 물질 복합체의 물질 특성치는 표 1에 잘 나타나있다.The dehydrated pulp was mixed well by mechanical mixing of a foamed starch main component, which had already been foamed in a circular shape of 2-3 cm in diameter. Capacity ratios of the starch component and the foaming component can be variously adjusted according to the use, and here it was prepared as starch / pulp (20/80 weight ratio). At this time, 5 wt% of the liquid starch adhesive was mixed with a small amount of paper, and additives such as a preservative and a desiccant were added to facilitate adhesion on the interface. A high temperature, high pressure press was applied at a temperature of 120 ° C. for 15 minutes at 2 atmospheres to remove more than 95% of the moisture of the pulp component, thereby preparing a starch pulp foam composite having a size of 50 cm x 50 cm x 0.7 cm. The internal structure of the composite is as shown in Figure 1. The material properties of the pulp and starch foam composites thus made are shown in Table 1.
[실시예2]Example 2
건조 펄프를 물에 풀어서 슬러쉬나 슬러리 상태로 만들어 주었다. 이 과정에서 충분한 기계적 분산작용을 시킴으로서 셀룰로오스 섬유를 완전히 물에 분해시켰다. 그다음 고해과정을 거쳐서 제지특성을 부여하고 Al2(SO4)3와 PAM을 각각 1% 씩 투입하였다. 즉 지료분매장치와 헤드박스를 통과한 펄프를 금망부를 통과시켜 여기서 탈수가 이루어지도록 하였다. 여기서 85%의 탈수가 이루어지도록 하고 탈수 정도는 용도에 따라 조절하였다. 여기서 발포를 시킬 수 있는 쌀, 옥수수, 감자등의 녹말성분 중에서 쌀을 85%의 탈수가 이루어진 펄프성분과 기계적인 혼합에 의해서 잘 섞었다. 녹말성분(쌀)과 펄프성분의 용량 비율은 용도에 따라 다양하게 조절하였다. 여기서는 녹말/펄프(30/70 중량비율)로 하여 서로 잘 분산이 되어서 섞이도록 하고 50㎝ x 50㎝ 크기의 발포용 몰드안에 채워 넣었다. 이때 여기에 액상형태의 녹말 접착제 5중량%를 약간의 고지성분과 혼합하고 방부제, 방습제등의 첨가제를 첨가하여 계면상의 접착이 잘 이루어지도록 하였다. 고온, 고압프레스를 이용하여 100℃ 까지 12분간에 걸쳐서 천천히 수분을 제거하고 150℃로 급격히 상승시켜 3기압 하에서 녹말/펄프 성분의 발포를 유발시켰다. 이렇게 만들어진 펄프와 쌀발포 녹말 물질의 물적 특성치는 표 1에 나타나있다.The dry pulp was dissolved in water to form a slush or slurry. In this process, the cellulose fibers were completely decomposed into water by giving sufficient mechanical dispersion. After the confession process, papermaking characteristics were given and 1% of Al 2 (SO 4 ) 3 and PAM were added. In other words, the pulp that passed through the paper distribution device and the head box was passed through the gold mesh to allow dehydration. Here, 85% dehydration was to be made and the degree of dehydration was adjusted according to the use. Here, among the starch components such as rice, corn, and potatoes that can be foamed, the rice was mixed well by mechanical mixing with the pulp component, which was dehydrated at 85%. Capacity ratio of the starch component (rice) and pulp component was adjusted in accordance with the application. In this case, starch / pulp (30/70 weight ratio) was well dispersed with each other, mixed, and filled into a 50 cm x 50 cm foam mold. At this time, 5 wt% of the liquid starch adhesive was mixed with some high fat components and additives such as preservatives and desiccants were added to facilitate adhesion of the interface. The hot and high pressure presses were used to slowly remove water over a period of 12 minutes to 100 ° C. and rapidly rise to 150 ° C. to induce foaming of starch / pulp components under 3 atmospheres. The physical properties of the pulp and rice-foamed starch material thus produced are shown in Table 1.
[실시예 3]Example 3
건조 펄프를 물에 풀어서 슬러쉬나 슬러리 상태로 만들어 주었다. 이과정에서 충분한 기계적 분산작용을 시킴으로서 셀룰로오스 섬유를 완전히 물에 분해 시켰다. 그다음 고해과정을 거쳐서 제지특성을 부여하고 Al2(SO4)3와 PAM을 각각 1%씩 투입하였다. 즉 지료분매장치와 헤드박스를 통과한 펄프를 금망부를 통과시켜 여기서 탈수가 이루어지도록 하였다. 여기서 85%의 탈수가 이루어지도록 하고 탈수 정도는 용도에 따라 조절하였다. 여기에 발포복합체의 기계적 강도와 인장성을 향상시키기 위하여 면부직포를 사용하여 면부직포의 양면에 녹말접착제를 이용하여 펄프성분과 이미 발포가 이루어진 길이 3㎝의 쌀발포체를 녹말/펄프(20/80 중량비율)로 하여 접착을 시킨다. 이때 여기에 액상형태의 녹말 접착제 5중량%를 소량의 고지 성분과 혼합하고 방부제, 방습제등의 첨가제를 첨가하여 계면상의 접착이 이루어지도록하였다. 고온, 고압프레스를 이용하여 120℃ 온도에서 15분간 2기압에서 압력을 가하여 습도를 95%이상 제거하여 녹말/펄프/면부직포의 발포체를 제조하고, 면부직포와 펄프, 발포된 녹말성분이 상호 접착이 되도록 제조하였다 이렇게 만들어진 펄프와 녹말 발포제, 그리고 강도와 인성향상을 위한 복합체의 구조는 그림 2에 나타나 있다.The dry pulp was dissolved in water to form a slush or slurry. In this process, the cellulose fibers were completely decomposed into water by sufficient mechanical dispersion. After the confession process, papermaking characteristics were given and Al 2 (SO 4 ) 3 and PAM were added 1% each. In other words, the pulp that passed through the paper distribution device and the head box was passed through the gold mesh to allow dehydration. Here, 85% dehydration was to be made and the degree of dehydration was adjusted according to the use. In order to improve the mechanical strength and tensile properties of the foamed composites, starch / pulp is prepared by using a cotton nonwoven fabric with a starch adhesive on both sides of the cotton nonwoven fabric with a pulp component and a foam having a length of 3 cm. Weight ratio) to bond. At this time, 5 wt% of the starch adhesive in the liquid form was mixed with a small amount of the high paper component, and additives such as preservatives and desiccants were added to achieve interfacial adhesion. Using high temperature and high pressure press, applying pressure at 120 ° C for 15 minutes at 2 atmospheres to remove more than 95% of humidity, to make foam of starch / pulp / cotton nonwoven fabric, and to make cotton nonwoven fabric, pulp and foamed starch component mutually The structure of the pulp, starch blowing agent, and composite for strength and toughness is shown in Figure 2.
[실시예4]Example 4
건조 펄프를 물에 풀어서 슬러쉬나 슬러리 상태로 만들어 주었다. 이 과정에서 충분한 기계적 분산작용을 시킴으로서 셀룰로오스 섬유를 완전히 물에 분해시켰다. 그다음 고해과정을 거쳐서 제지특성을 부여하고 Al2(SO4)3와 PAM을 각각 1% 씩 투입하였다. 즉 지료분매장치와 헤드박스를 통과한 펄프를 금망부를 통과시켜 여기서 탈수가 이루어지도록 하였다. 여기서 85%의 탈수가 이루어지도록 하고 탈수 정도는 용도에 따라 조절하였다. 여기서 발포복합체의 기계적 강도와 인장성을 향상시키기 위하여 면부직포를 사용하여 면부직포의 양면에 펄프와 발포를 시킬수 있는 쌀성분을 잘 섞어서 녹말/펄프(30/70 중량비율)로 하여 녹말 접착제를 사용하여 부착시켰다. 이때 여기에 액상형태의 녹말 접착제 5중량%를 소량의 고지 성분과 혼합하고 방부제, 방습제등의 첨가제를 첨가하여 계면상의 접착이 잘 이루어지도록 하였다. 고온,고압 프레스를 이용하여 온도를 100℃까지 12분간에 걸쳐서 천천히 올려서 수분을 제거하고 150℃로 급격히 상승시켜 3기압 하에서 녹말/펄프 성분의 발포를 유발시켰다. 이렇게 만들어진 펄프와 쌀발포 녹말 물질의 물적 특성치는 표 1에 나타나 있다.The dry pulp was dissolved in water to form a slush or slurry. In this process, the cellulose fibers were completely decomposed into water by giving sufficient mechanical dispersion. After the confession process, papermaking characteristics were given and 1% of Al 2 (SO 4 ) 3 and PAM were added. In other words, the pulp that passed through the paper distribution device and the head box was passed through the gold mesh to allow dehydration. Here, 85% dehydration was to be made and the degree of dehydration was adjusted according to the use. In order to improve the mechanical strength and tensile property of the foamed composite, the cotton nonwoven fabric is used as a starch / pulp (30/70 weight ratio) by mixing well the pulp and rice components that can be foamed on both sides of the cotton nonwoven fabric. Was attached. At this time, 5 wt% of the starch adhesive in liquid form was mixed with a small amount of high fat components, and additives such as preservatives and desiccants were added to facilitate adhesion on the interface. Using a high temperature and high pressure press, the temperature was slowly raised to 100 ° C. over 12 minutes to remove moisture and rapidly increased to 150 ° C. to induce foaming of starch / pulp components under 3 atm. The physical properties of the pulp and rice-foamed starch material thus produced are shown in Table 1.
[실시예5]Example 5
건조 펄프를 물에 풀어서 슬러쉬나 슬러리 상태로 만들어 주었다. 이 과정에서 충분한 기계적 분산작용을 시킴으로서 셀룰로오스 섬유를 완전히 물에 분해시켰다. 그다음 고해과정을 거쳐서 제지특성을 부여하고 Al2(SO4)3와 PAM을 각각 1% 씩 투입하였다. 즉 지료분매장치와 헤드박스를 통과한 펄프를 금망부를 통과시켜 여기서 탈수가 이루어지도록 하였다. 여기서 85%의 탈수가 이루어지도록 하고 탈수 정도는 용도에 따라 조절하였다. 여기서 발포를 시킬 수 있는 쌀, 옥수수, 감자등의 녹말 성분중에서 쌀을 85%의 탈수가 이루어진 펄프 성분과 기계적인 혼합에 의해서 잘 섞었다. 녹말성분(쌀)과 펄프성분의 용량비율은 용도에 따라 다양하게 조절할수 있다. 여기서는 녹말/펄프(30/70 중량비율)로 하여 서로 잘 분산이 되어서 섞이도록하고 50㎝ x 50㎝ 크기의 발포용 몰드안에 채워넣었다. 그리고 펄프와 녹말 발포제의 최종물성을 향상시키기 위하여 5중량%의 길이 1㎝ 크기의 면 단섬유를 잘 분산이 되도록 같이 섞어서 기계적 강도를 향상시키는 역할을 하도록 하였다. 이때 여기에 액상형태의 녹말 접착제 5중량%를 소량의 고지성분과 혼합하고 방부제, 방습제등의 첨가제를 첨가하여 계면상의 접착이 잘 이루어지도록하였다. 고온, 고압프레스를 이용하여 온도를 100℃까지 12분간에 걸쳐서 천천히 올려서 수분을 제거하고 150℃로 급격히 상승시켜 3기압 하에서 녹말/펄프 성분 발포를 유발시켰다.The dry pulp was dissolved in water to form a slush or slurry. In this process, the cellulose fibers were completely decomposed into water by giving sufficient mechanical dispersion. After the confession process, papermaking characteristics were given and 1% of Al 2 (SO 4 ) 3 and PAM were added. In other words, the pulp that passed through the paper distribution device and the head box was passed through the gold mesh to allow dehydration. Here, 85% dehydration was to be made and the degree of dehydration was adjusted according to the use. Here, among the starch components such as rice, corn, and potato that can be foamed, the rice was mixed well by mechanical mixing with the pulp component, which was dehydrated at 85%. The capacity ratio of the starch component (rice) and pulp component can be variously adjusted according to the use. In this case, starch / pulp (30/70 weight ratio) was well dispersed with each other, mixed, and filled into a 50 cm x 50 cm foam mold. And in order to improve the final physical properties of the pulp and starch foaming agent 5% by weight of cotton short fibers of 1cm in length was mixed together to be well dispersed to serve to improve the mechanical strength. At this time, 5% by weight of liquid starch adhesive was mixed with a small amount of high-fat ingredients, and additives such as a preservative and a desiccant were added to facilitate adhesion on the interface. Using a high temperature and high pressure press, the temperature was slowly raised to 100 ° C. over 12 minutes to remove moisture and rapidly increased to 150 ° C. to induce starch / pulp component foaming under 3 atm.
[실시예6]Example 6
건조 펄프를 물에 풀어서 슬러쉬나 슬러리 상태로 만들어 주었다. 이 과정에서 충분한 기계적 분산작용을 시킴으로서 셀룰로오스 섬유를 완전히 물에 분해시켰다. 그다음 고해과정을 거쳐서 제지특성을 부여하고 Al2(SO4)3와 PAM을 각각 1% 씩 투입하였다. 즉 지료분매장치와 헤드박스를 통과한 펄프를 금망부를 통과시켜 여기서 탈수가 이루어지도록 하였다. 여기서 85%의 탈수가 이루어지도록 하고 탈수 정도는 용도에 따라 조절하였다. 여기에 발포를 시킬 수 있는 쌀, 옥수수, 감자등의 녹말성분 중에서 쌀을 85%의 탈수가 이루어진 펄프성분과 기계적인 혼합에 의해서 잘 섞었다. 녹말성분(쌀)과 펄프성분의 용량 비율은 용도에 따라 다양하게 조절하였다. 여기서는 녹말/펄프(30/70 중량비율)로 하여 서로 잘분산이 되어서 섞이도록 하고 50㎝ x 50㎝ 크기의 발포용 몰드안에 채워 넣었다. 그리고 펄프와 녹말발포체의 최종 물성을 형상시키기 위하여 7중량의%의 길이 3㎝ 크기의 면 단섬유룰 잘 분산이 되도록 같이 섞어서 기계적 강도를 향상시키는 역할을 하도록 하였다. 이때 여기에 액상형태의 녹말 접착제 8중량%를 소량의 고지성분과 혼합하고 방부제, 방습제등의 첨가제를 첨가하여 계면상의 접착이 잘 이루어지도록하였다. 고온, 고압프레스를 이용하여 온도를 100℃까지 12분간에 걸쳐서 천천히 올려서 수분을 제거하고 150℃로 급격히 상승시켜 3기압 하에서 녹말/펄프 성분의 발포를 유발시겼다. 이렇게 만들어진 펄프와 쌀발포 녹말 물질의 물적 특성치는 표 2에 나타나 있다.The dry pulp was dissolved in water to form a slush or slurry. In this process, the cellulose fibers were completely decomposed into water by giving sufficient mechanical dispersion. After the confession process, papermaking characteristics were given and 1% of Al 2 (SO 4 ) 3 and PAM were added. In other words, the pulp that passed through the paper distribution device and the head box was passed through the gold mesh to allow dehydration. Here, 85% dehydration was to be made and the degree of dehydration was adjusted according to the use. Among the starch components such as rice, corn, and potatoes that can be foamed, the rice was mixed well by mechanical mixing with the pulp component, which was dehydrated at 85%. Capacity ratio of the starch component (rice) and pulp component was adjusted in accordance with the application. In this case, starch / pulp (30/70 weight ratio) was well dispersed with each other, mixed, and filled into a 50 cm x 50 cm foam mold. And in order to form the final physical properties of the pulp and starch foams were mixed together so as to disperse cotton short fibers of 3cm in length of 7% by weight to serve to improve the mechanical strength. At this time, 8 wt% of the liquid starch adhesive was mixed with a small amount of high-fat ingredients, and additives such as preservatives and desiccants were added to facilitate adhesion on the interface. Using a high temperature and high pressure press, the temperature was slowly raised to 100 ° C. over 12 minutes to remove moisture and rapidly increased to 150 ° C. to induce foaming of starch / pulp components under 3 atm. The physical properties of the pulp and rice-foamed starch material thus produced are shown in Table 2.
Claims (2)
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| KR1019950008879A KR100191735B1 (en) | 1995-04-12 | 1995-04-12 | Foaming pulp composition having degradability |
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| KR1019950008879A KR100191735B1 (en) | 1995-04-12 | 1995-04-12 | Foaming pulp composition having degradability |
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