• Applied Chemistry for Engineering
• /
• v.18 no.5
• /
• pp.527-530
• /
• 2007

The binary liquid type fire retardant paint of polyurethane (alkyd resin) lacquer is developed to cover the defect of one liquid type white paint of chlorinated rubber used generally but which has weak surface and poor adhesive strength to the wood as well as generating much black smoke when it is firing. The properties of the composition of binary liquid type of white paint of polyurethane lacquer developed in this study for using to wood has shown that the better suppressed smoke generation and enhanced the adhesive strength to the wood than that of fire retardant white paint used.

• Journal of the Korea Institute of Building Construction
• /
• v.13 no.2
• /
• pp.122-130
• /
• 2013

One of recent methods to protect wooden cultural assets from fire, there is the flame retardation which is applied directly to wood and it is to prevent fire through securing flame resistance for the material and delaying combustion when failed fire in advance and then to gain time for people in the room to evacuate and it has same goal with the Korean Fire Service Act by protecting life and property. However, in case of spraying flame retardant on the colored surface of the wooden cultural assets, there are continuous problems of decoloration, efflorescence and water absorbtion after sometime and accordingly there increases danger of damages of cultural assets. So when treating with flame retardant on wooden cultural assets, there has to be no problems on dancheong after sometime and securing sustainable methods for flmae retardation should be preceded. Accordingly, this study aims to provide basic sources for selecting proper flame retardation methods by evaluating and analyzing flame retardation capabilities according to types of flame retardants which are frequently used nowadays and spraying them on the dancheong-painted surface and confirming if there is no problem on the dancheong and wood after sometime and if flame retardation effect is sustainable with its quality and capability through precise analysis.

• Fire Science and Engineering
• /
• v.24 no.3
• /
• pp.52-57
• /
• 2010

Fire protection countermeasure were considered on the straw thatched roof and wooden structure. For the fire resistant treatment, rice straw was soaked in the fire resistant liquid with different soaking time. After treatment, some rice straw sample was washed with water then the rice straws were tested to check the fire resistance performance. And the wood was soaked in the fire resistant liquid at an atmospheric pressure, vacuum-pressure condition and painted with brush on the surface. To analyse the fire resistant performance of rice straw, ignition delay time was measured under the radiant heat flux of cone heater. And the fire resistant performance of wood samples were tested with 45 degree fire resistant test apparatus and cone heater. Based on the cone heater test, the rice straw which most easily ignitable material shows the longer ignition delay time than not treated ones and even in the water washed straw show a longer ignition delay time than not treated ones. And fire resistant treated woods of vacuum-pressure treated sample showed the most excellent performance on fire resistance. And the fire resistant treated by brush and soaking showed a longer ignition delay time than not treated ones. From this experiment, it was found that a fire resistant treatment of rice straw and wood of the house can be protected from the fire spread.

• Journal of the Korea Institute of Building Construction
• /
• v.8 no.6
• /
• pp.117-122
• /
• 2008

This study targets to improve and complement the problem of existing flame resistant processing with flame resistant performance the same as existing flame resistant agents or better, keeping wooden surface & feel as they are, and to attempt to raise flame resistant performance and economic efficiency by applying phosphorous flame resistant agents, a colorlessness, odorless new product to woods for an improvement of flame resistant performance for wooden nature and to offer a basic data for an uniform high-performance for flame resistant woods by reinforcing wooden durability and usability.

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
• /
• 2011.04a
• /
• pp.408-411
• /
• 2011

본 연구는 목조 문화재나 전통사찰 등에서 많이 적용되고 있는 단청처리된 목재에 대해 방염액을 사용하여 방염처리를 진행하였을 때 발생될 수 있는 백화현상를 단청목제가 적용 될 수 있는 외부환경과 일반적인 내부환경에 위치시켜 발생여부를 확인하여 보았다. 일반적으로 사용되어지는 6가지 종류의 단청색상에서 햇빛이나 눈비 등에 의한 영향, 습도 등에 따른 영향은 크지 않은 것으로 나타났으나 일부 단청 색상에서는 다소 습도가 높았던 실내 환경에서는 방염액이 많이 도포되어진 부분에서 백화현상이 일부 나타나는 것을 확인할 수 있었으며 단청의 색상을 구성하는 성분 차이에 의해 백화현상이 발생될 수 있음을 확인할 수 있었다.

• Journal of the Korean Wood Science and Technology
• /
• v.43 no.4
• /
• pp.511-517
• /
• 2015

Sound absorption capability of the flame resistant treated sawdust-mandarin peel composite particleboard was were estimated by two microphone transfer function methods. The weight of flame resistant treated board slightly increased by the treatment. The treatment improved fire retardant performance by decreasing the charred area of flame resistant treated board. Sound absorption capabilities of flame resistant treated sawdust-mandarin peel composite particleboard, in the entire estimated frequency range of 500-6,400 Hz was slightly lower than those of the control specimen. Sound absorption capability of both the control and flame resistant treated sawdust-mandarin peel composite particleboards were higher than that of commercial gypsum boards, being widely used as a sound absorber for ceiling at the estimated frequency.

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
• /
• 2008.04a
• /
• pp.124-127
• /
• 2008

현장방염처리 물품의 방염성능평가시 실내 인테리어 공사가 끝난 후 시험 시료를 채취하여 연소시험을 실시하게 되어있다. 그러나 이러한 절차로 인해 검사 소요시간이 길어지고 여러 민원이 발생하여 이를 대처할 시험 방법이 필요하다. 따라서 연소시험 대신 도막두께 측정 시험 방법을 도입하여 방염성능평가에 따른 문제점들을 해결하고자 한다. 도막두께 측정 시험의 경우 도막두께 측정용 라벨을 방염도료를 칠해야 하는 합판이나 목재 위에 붙이고 도료 작업이 끝나고 나면 관할 소방서에 이 라벨을 떼어서 제출하여 기준 도막 두께와 비교 측정하였을 때 기준 도막두께보다 두꺼우면 방염성능을 인정해주고 만약 기준 도막두께보다 얇게 칠해지면 현장 검사 또는 시료 채취 후 연소시험을 병행하여 검사함으로서 안전하고, 책임 있는 방염성능 시공을 할 수 있도록 관리 감독할 수 있을 것이다.

• Journal of the Korean Wood Science and Technology
• /
• v.49 no.1
• /
• pp.44-56
• /
• 2021

The carbonized length and area of plywood by the various spreading concentration of water glass and the type of additives were measured in accordance with the 45° MecKel's burner method of the fire protection performance standard of the Korean National Fire Agency. As a result of treating water glass with a concentration of 20 to 50 % on plywood, the flame retardancy tended to increase in proportion to the concentration of water glass. However, the optimum concentration of water glass was determined to be 30 % due to the efflorescence and sticky on the surface of plywood treated with high-concentration water glass of more than 30 %. As a result of the experiment by adding different proportions of additives to the water glass with concentration of 30 %, the standard of flame performance standard was satisfied under the conditions with the addition of 15% potassium hydroxide and 1-10% aluminum hydroxide, respectively. On the other hand, there were no significant difference in the flame retardancy by adding magnesium sulfate. These results about the flame retardancy of plywood by water glass and additives were expected to be basic data for improving flame-retardant treated wood.

• Journal of the Korean Wood Science and Technology
• /
• v.41 no.3
• /
• pp.234-246
• /
• 2013

It was found that test piece heated rapidly by 3 kW microwave for 5 minutes satisfies the targeted temperature and the percentage of moisture content, and the highest rate of weight increase is obtained in case of 120 minute immersion in the mixture of phosphates and heterocyclic compounds, from the result of such analysis as: kiln drying schedule, flame retardent by flammability test, insect resistance by termites, and permeability of combined penetrant for the wood after assigning multifunctional finish by immersing conifer structural frame, which is used for the frame work of wooden house and indoor/outdoor finishing in flame retardant and insect repellent materials mixture with the remaining heat of microwave. In addition, after a test of flame retardent treated item, it was identified that every mixture of phosphates corresponds with the standards of flame retardent, and upon investigation of moritality of 7 days after putting termites, it was showed that test piece immersed in the mixture of phosphates and heterocyclic compounds has the best characteristics, showing over 96% of high moritality. From the analysis of inward permeability of combined penetrant for the wood, it was decided that excellent performance in the flame retardent and insect resistance of the wood revealed due to full penetration of combined penetrant as it was found that combined penetrant penetrated through the whole inner cells of the wood.

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
• /
• 2009.04a
• /
• pp.396-403
• /
• 2009