• 제목/요약/키워드: Residual ink

검색결과 26건 처리시간 0.022초

플라스틱 포장재의 잔존 인쇄 용제 감소 방안 (Study about decreasing methods of printing ink solvents residue amounts on plastic food package materials)

  • 안덕준;조훈일
    • 한국포장학회지
    • /
    • 제10권1호
    • /
    • pp.1-6
    • /
    • 2004
  • Amount of residual ink solvent on the packaging materials from Korea, Japan and Europe was measured and compared. The amount of packaging materials from Korea was much higher than that of Japan and Europe. To reduce the residual amounts of ink solvent, aging condition of printed packaging materials including aging time and temperature was modified and evaluated. Aging with high temperature and short time ($60^{\circ}C$ and 24 hours) was more effective for reduction of residual amount of ink solvent than that with low temperature and long time. To find out change of reduction pattern of residual amount of solvent according to plastic packaging material, several monolayer and multilayer packaging materials were selected. Among the monolayer packaging materials, the amount of EVOH and PET was lower than that of polyolefin plastic film including PE and PP. PP/EVOH/PET among the selected multilayer film showed the lowest amount of residual ink solvent on food packaging materials. Result of this research revealed that the residual amount of ink solvent can be reduced by proper selection of aging condition with and by appropriate application of mutilayer plastic film.

  • PDF

Headspace 방법과 tenax 방법을 이용한 잔존 용제 분석 방법의 비교 (Comparison of analytical method of headspace and tenax analysis for residue of solvent amounts on plastic packaging materials)

  • 안덕준
    • 한국포장학회지
    • /
    • 제10권1호
    • /
    • pp.63-68
    • /
    • 2004
  • The regulations for migration amounts in USA, EU and Korea are investigated to compare the actual overall and specific migration date from plastic food packaging materials. Among the packaging materials regulated in above countries, printing ink solvents on packaging materials is used very widely and sometimes cause off-flavor in the food by migration of residual solvents. Even though migration of the residual solvents dose not generally cause safety problems in the contained food, it certainly can generate off-flavor and finally deteriorate quality of the finished product. Therefore regulation and development of analytical method for amount of residual ink solvents are very important issue in food industry. The headspace analytical method and tenax method for residual ink solvent on food packaging materials were evaluated from the accuracy, precise, swiftness and convenience of viewpoint. Headspace analytical method was selected and recommended for using in food industry field.

  • PDF

도공층의 공극성이 인쇄후 잉크의 잔류 거동에 미치는 영향 - 안료와 잉크의 효과 - (Investigation on Relationship Between Pore Structure of Coating Layer and Ink Residual Behavior - Focused on the Effect of Pigments and Inks -)

  • 김병수;정현채;박종열
    • 펄프종이기술
    • /
    • 제34권3호
    • /
    • pp.53-58
    • /
    • 2002
  • This paper was performed to investigate the effect of pore structure on ink residual behavior. To prepare different coating structures as substrates against inks, fine, medium and coarse calcium carbonate were used in the coating color. It is well known ink properties can affect to print qualities. After printing on the coated paper, ink layer can consider as third structure addition to paper and coating layer. To compare effect of ink properties on the surface structure and print qualities, several properties of ink were also adopted as raw material. Particle size of pigment effect on gloss evaluation of coated paper increased with calendering. It was shown that ink transfer rate increased as surface of the sample was smooth. The ink contained low viscosity resin evaluated more print gloss. Finer pigment particle size, smaller pore size and higher porosity. Pore volume of coated paper was slightly decreased with printing as the coating was prepared with the finest particle size. However, it founded that ink resin could not affect on pore volume and distribution of printed paper

플라스틱 필름에 대한 유기 용매의 전이 특성에 관한 연구 (Studies on the Migration behavior of various Printing Ink solvents of plastic films)

  • 안덕준
    • 한국포장학회지
    • /
    • 제6권1호
    • /
    • pp.19-23
    • /
    • 2000
  • The increasing use of plastics in food packaging materials has led to the issue of food-packaging mutual interactions from residues in the plastics. Plastic films are commonly printed by using solvent-based ink to decorate the packaged food for consumer attention. However, the residual solvents can not be completely removed and they can migrate into the contained food which lead to undesirable off-flavors. Partitioning (Kp) of printing ink solvents was studied in two types of plastic films with different chemical structure and polarity. At $25^{\circ}C$, Kp of toluene is higher than that of isopropanol in PP, but isopropanol showed higher Kp value than toluene in EVOH. This showed that polarity had a significant effect on the partitioning of printing ink solvents into the plastic films. Printing solvents had a higher affinity to the polymer with similar polarity than it did to the different one.

  • PDF

열응력과 잔류응력하의 다층박막의 피로수명 해석 (Fatigue Life Analysis on Multi-Stacked Film Under Thermal and Residual Stresses)

  • 박준협
    • 대한기계학회논문집A
    • /
    • 제29권4호
    • /
    • pp.526-533
    • /
    • 2005
  • Reliability problem in inkjet printhead, one of MEMS devices, is also very important. To eject an ink drop, the temperature of heater must be high so that ink contacting with surface reaches above $280^{o}C$ on the instant. Its heater is embedded in the thin multi-layer in which several materials are deposited. MEMS processes are the main sources of residual stresses development. Residual stress is one of the factors reducing the reliability of MEMS devices. We measured residual stresses of single layers that consist of multilayer. FE analysis is performed using design of experiment(DOE). Transient analysis for heat transfer is performed to get a temperature distribution. And then static analysis is performed with the temperature distribution obtained by heat transfer analysis and the measured residual stresses to get a stress distribution in the structure. Although the residual stress is bigger than thermal stress, thermal stress is more influential on fatigue life.

효소를 이용한 레이저 인쇄된 고지의 탈묵 (Deinking of Laser-printed Paper Using Enzyme)

  • 안병준;백기현
    • 펄프종이기술
    • /
    • 제29권2호
    • /
    • pp.16-24
    • /
    • 1997
  • This experiment was mainly performed with a biological treatment of laser printed paper using enzyme, We got the following conclusions : In the case of nonionic surfactant treatment, brightness, residual ink contents and several strength properties of deinked paper were excellent at the low dosage of cellulase 0.05%. When mixed cellulase and xylanase was used, yield was increased as the dosage increased up to 0.2%, but brightness was decreased at the same condition. In contrast, deinking efficiency of anionic type was reduced in terms of brightness, residual ink contents, and tensile strength. As flotation time was increased, yield decreased and brightness increased slightly. On the other hand, the addition of surfactant during repulping process showed better result than that during flotation process.

  • PDF

복사용지의 리사이클링 반복처리에 따른 재생지의 특성 및 고지의 탈묵성 변화 (Changes of Recycled Paper Properties and Waste Paper Deinkability by the Repeated Recycling of Photocopy Paper)

  • 신준섭
    • 한국포장학회지
    • /
    • 제4권2호
    • /
    • pp.24-32
    • /
    • 1998
  • 인쇄하지 않은 복사용지에 대해 침지, 탈수, 건조등 일련의 리사이클링 사이클의 반복횟수에 따라 얻어지는 재생지의 광학적 성질의 변화와, 리사이클링 횟수를 달리한 펄프를 이용하여 고지를 제조한 후 하여 고지의 탈묵성 변화를 살펴보았다. 그 결과, 리사이클링 횟수 증가에 따라 얻어진 재생지의 백색도는 원래보다 약10% 저하되었으나, 섬유간 결합감소에 따른 비산란계수의 증가로 불투명도는 약10%정도 증가하는 경향을 보였다. 또한, 리사이클링 횟수에 따른 고지의 탈묵성은 섬유의 표면 자유에너지 감소, 즉 섬유의 소수화 증가로 인하여 약간 저하되는 것으로 나타났다.

  • PDF

Deinking of ONP with Cellulolytic Enzymes and Synthetic Collecter in Alkaline pH

  • Yoon, Kyong-Dong;Eom, Tae-Jin
    • 한국펄프종이공학회:학술대회논문집
    • /
    • 한국펄프종이공학회 2006년도 PAN PACIFIC CONFERENCE vol.2
    • /
    • pp.451-454
    • /
    • 2006
  • This paper presents an overview of ONP deinking efficiency with cellulolytic enzymes and synthetic collector in alkaline pH. Deinking is a series of unit operations designed to detach ink from cellulose fibers and separate the dispersed ink from the pulp slurry. Deinking chemicals are process aids that enable expensive mill equipment used in these unit operations to operate more efficiently - often much more efficiently. We propose the blended deinking agent with cellulolutic enzymes and synthetic collector in deinking pulp of conventional alkaline method. The deinking efficiency of old news print in alkaline pH was enhanced with enzyme treatments. The brightness of deinked pulp was increased with less residual ink particles and yield of enzymatic deinked pulp was improved compared to the deinked pulp of conventional alkaline method.

  • PDF

알칼리 저감형 신문지용 복합 탈묵제 (Complex Agent for low alkalinity Deinking process of ONP)

  • 윤경동;박헌신;강윤석;엄태진
    • 한국펄프종이공학회:학술대회논문집
    • /
    • 한국펄프종이공학회 2006년도 추계학술발표논문집
    • /
    • pp.9-14
    • /
    • 2006
  • Deinking is a series of unit operations designed to detach ink from cellulose fibers and separate the dispersed ink from the pulp slurry. Deinking chemicals are process aids that enable expensive mill equipment used in these unit operations to operate more efficiently. This paper presents an overview of ONP deinking efficiency with cellulolytic enzymes and synthetic collector in low alkalinity process. The deinking efficiency of old news print even in low alkalinity condition was enhanced with enzyme contained complex agent. The brightness of deinked pulp was increased with less residual ink particles and yield of deinked pulp was improved compared to the deinked pulp of conventional alkaline method.

  • PDF

폐지의 효소 탈묵 (Enzymatic deinking of wastepaper)

  • 윤경동;박성배;박용현;엄태진
    • Current Research on Agriculture and Life Sciences
    • /
    • 제22권
    • /
    • pp.49-56
    • /
    • 2004
  • Cellulolytic enzymes were prepared from alkaline resistant microorganisms which were newly screened from calcic soil. Characteristics of enzymes and enzymatic deinking efficiency of wastepaper were investigated. The results were summarized as fellows: 1. The recovery rate of crude enzyme was 93.7% in Bio-B and 57.4% in Bio-F. 2. The protein content in crude enzymes was lowest and the thermal stability of crude enzymes was highest in Bio-F. 3. The brightness gain of Bio-F deinked pulp was best in ONP and Bio-B deinked pulp was best in MOW. 4. The reject yield was increased with enzymatic deinking flotation process. 5. The residual ink area of paper was increased with enzymatic deinking and large size of ink particles were remained in paper.

  • PDF