• Proceedings of the Korea Technical Association of the Pulp and Paper Industry Conference
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• 2011.10a
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• pp.345-357
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• 2011

Recently increasing eco-efficiency of natural dyeing has become an important topic. The purpose of this study was to manufacture colored Wall paper for interior materials by combining color therapy and natural dyeing. For this purpose, through experiments with water-bleed, K/S value and chroma changes of samples in Wall paper for interior materials.

• The Mathematical Education
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• v.53 no.3
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• pp.435-447
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• 2014

Recently, the interdisciplinary integration and story-telling are often mentioned in mathematics education. It is probably because they might be helpful to students for positive attitude for mathematics. In this research, through brief discussion mathematics related with wallpaper patterns, we try to integrate mathematics and design, and eventually develop the teaching/learning materials for experience activities and story-telling.

• Elastomers and Composites
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• v.53 no.3
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• pp.131-135
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• 2018

This study was aimed at improving the white index (WI) to prepare thermally expandable microspheres for wallpaper. In particular, thermally expandable microspheres were prepared for different colloidal silica particle sizes to study thermal properties, foaming ratio, and WI. The spheres obtained from tiny colloidal silica were the best in terms of WI and yellowing. Additionally, thermogravimetric analysis results show that small colloidal silica particles are more likely to be adsorbed physically or chemically to the microsphere surface, thereby improving WI at higher temperatures.

• The Journal of Society for e-Business Studies
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• v.6 no.3
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• pp.1-16
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• 2001

In this paper, we introduced a POS(Point of Sale) system for a wallpaper company. We designed the database schema for the POS system, and proposed various application areas of the POS system. Especially, we discussed such application areas as inventory control, marketing, product development, and distribution channel. The quality of product management is enhanced by precise ABC inventory control and safety stock control. Marketing strategies can be more precisely established, and their effects can be measured. The development time can be shortened and new products can be developed based on the real market demands. Distributors can improve their management quality using precise sales data.

• Journal of Elementary Mathematics Education in Korea
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• v.14 no.3
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• pp.827-842
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• 2010

In this paper, actual didactical transposition and dramatization of designing patterns presented in 4th grade mathematics curriculum is critically reviewed. Patterns in designing patterns are not wallpaper patterns generally. The method of designing new patterns using unit given pattern are not the same as the method of designing wallpaper patterns. In the viewpoint of not designing wallpaper patterns, the context of designing new patterns using unit given pattern is said to be putting transparent stickers. In this paper, on the premise of this characteristics, the shape of unit given pattern, the method of designing new patterns using unit given pattern, and the rule of putting unit given patterns continually are critically discussed. The shape of unit given pattern have to be square actually. In designing new patterns using unit given pattern, if the regularities of designing new patterns can be presented, any regularity is fine. Even though the relationship between new patterns and wallpapers designed by using unit given pattern is not clear, in that these two patterns can not be unrelated, designing new patterns using unit given pattern could be an example of wrong elementarization(Freudenthal, 1973).

• Journal of Adhesion and Interface
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• v.12 no.4
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• pp.125-132
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• 2011

As the enhancement of indoor air quality is increasingly compelling the use of natural materials without any emission, this study reports the preparation and performance of natural garlic adhesives for wallpaper. The natural garlic adhesives were successfully prepared by the extraction of the clove of raw garlic with water to isolate carbohydrates and proteins. Properties of the prepared garlic adhesives such as the non volatile solids content, viscosity, density, and pH were 62%, 2,789 mPa.s, $1.3g/cm^3$, and 6.6, respectively. The non-volatile solids content has a great impact on the adhesion performance of the prepared garlic adhesives, which was adequate about 60%. Bonding strength of prepared garlic adhesives was greater than the requirement of a Korean standard for wallpaper. In addition, the garlic adhesives showed antibacterial activity inheriting from the garlic. It is expected that the prepared garlic adhesives could be used as safe and natural adhesives without emitting any volatile organic compounds and formaldehyde gas.

• Journal of the Korean Wood Science and Technology
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• v.25 no.4
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• pp.17-21
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• 1997

This study was carried out to develop the manufacturing technique of Korean paper(Hanji) and find out new uses of machine-made Hanji produced on a a large scale by paper machine. Six kinds of Hanji were made and laminated with backpaper by acryl-based or vinyl acetate ethylene-based adhesive. Six kinds of wallpapers were made such as WH 1, WH 2-1, WH 2-2, WH 3-1, WH 3-2 and WH 4. Physical properties and quality test on the wallpapers were examined. Physical strength of the wallpapers was better than each strength of the Hanji and backpaper. It might be a roll of adhesive. And so, Production cost of the Hanji could be brought down if the Hanji was made thin to get strength not enough to cut during lamination of two papers(Hanji and backpaper). Hanji wallpapers of WH 3-1 and WH 4 are lower than a standard in sunlight resistance and WH 1 is in properties of opacity. WH 2-1, WH 2-2 and WH 3-2 were better than Korean standard in some quality tests. WH 2-2 and WH 3-2 were superior to other wallpapers as a whole. About, twenty kinds of wallpapers with surface treatment, are now being produced on the basis of these two types of wallpapers.

• Fire Science and Engineering
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• v.15 no.3
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• pp.36-43
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• 2001

Several types of widely used interior upholsteries including wallpaper, veneer board and floor cover, were selected to be evaluated by using the method of NES 713 text. Test results indicates that a fire with retardant wallpaper release a large amount of toxic gases when constantly exposed to a fire source. When evaluated in terms of the masses of released gases, the release of Carbon monoxide appears the highest in case of wallpaper fire, while the ratio of CO/Mass loss appears the highest in case of floor cover fire. Therefore, it can be concluded that, a large amount of toxic gas will release from a floor cover fire with even a small quantity of fuel.

• Current Optics and Photonics
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• v.5 no.3
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• pp.298-305
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• 2021

Modern distance sensing methods employ various measurement principles, including triangulation, time-of-flight, confocal, interferometric and frequency comb. Among them, the triangulation method, with a laser light source and an image sensor, is widely used in low-cost applications. We developed an omnidirectional two-dimensional (2D) distance sensor based on the triangulation principle for indoor floor mapping applications. The sensor has a range of 150-1500 mm with a relative resolution better than 4% over the range and 1% at 1 meter distance. It rotationally scans a compact one-dimensional (1D) distance sensor, composed of a near infrared (NIR) laser diode, a folding mirror, an imaging lens, and an image detector. We designed the sensor layout and configuration to satisfy the required measurement range and resolution, selecting easily available components in a special effort to reduce cost. We built a prototype and tested it with seven representative indoor wall specimens (white wallpaper, gray wallpaper, black wallpaper, furniture wood, black leather, brown leather, and white plastic) in a typical indoor illuminated condition, 200 lux, on a floor under ceiling mounted fluorescent lamps. We confirmed the proposed sensor provided reliable distance reading of all the specimens over the required measurement range (150-1500 mm) with a measurement resolution of 4% overall and 1% at 1 meter, regardless of illumination conditions.

• Analytical Science and Technology
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• v.20 no.6
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• pp.488-495
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• 2007

A wallpaper having many surfaces in indoor is composed of various raw materials. In this study, TVOC contribution from raw materials of PVC wallpaper was evaluated by using headspace-solid phase microextraction (HS-SPME)-GC/MS. Samples were diluent, resin stabilizer, plasticizer, filler, blowing agent and PVC resin. 9 mL of each sample was put into 22 mL glass vial and they were equilibrated for 1 hour at $100^{\circ}C$. Headspace in vial was absorbed to $75{\mu}m$ Carboxen-PDMS fiber and analyzed by GC/MS. Aromatic compounds like a toluene, ethylbenzene and xylene, ketones compounds like a acetone, methoxyacetone and 2-butanone and alkane compounds like a nonane decane and undecane were identified from raw materials. And alcohol compounds like a ethanol and butanol and aldehydes were detected. TVOC emission of diluent, resin stabilizer, plasticizer, PVC resin, blowing agent and filler were $54.20{\mu}g/g$, $32.88{\mu}g/g$, $0.50{\mu}g/g$, $0.88{\mu}g/g$, $0.22{\mu}g/g$ and $0.11{\mu}g/g$, respectively. Contribution of TVOC emission of diluent, resin stabilizer and PVC resin that were concerned about add ratio were 0.708, 0.129, 0.115, respectively. In conclusion, it's necessary to reduce TVOC emission through improvement of diluent, resin stabilizer and PVC resin. Also, HS-SPME-GC/MS method which was developed in this study will be used for raw materials analysis effectively.