• Title/Summary/Keyword: nylon 4

Search Result 502, Processing Time 0.034 seconds

Morphology and Impact Strength of High Density Polyethylene/Polyamide Alloy (HDPE/PA 알로이의 모포로지와 충격강도)

  • Lee, Yong-Moo;Kang, Doo-Whan
    • Elastomers and Composites
    • /
    • v.28 no.4
    • /
    • pp.283-292
    • /
    • 1993
  • The morphology and impact strength of alloys of high density polyethylene(HDPE) and nylon-6(PA) with modified $ethylene-{\alpha}-olefin$ copolymer(OCP) as compatibilizer and impact modifier were measured by the scanning electron microscope(SEM) and the notched Izod impact test(and the high rate impact test), respectively. HDPE is incompatible with PA and specimens obtained from simple mechanical mixing show the inferior properties. However, it was indicated that OCP played roles of not only impact modifier but also compatibilizer. High rate impact test results were different from those of the notched Izod impact test, but in both tests OCP was effective for HDPE/PA blends. From SEM observation, the size of the dispersed phase in alloys prepared with OCP is much smaller than that of alloys without OCP and the interfacial adhesion of alloys prepared with OCP is also better. Toughening mechanism of polymer blends was discussed by combining the morphology analysis with mechanical and thermal properties.

  • PDF

A Study on the Mechanical Properties of Fabrics Treated with Water Soluble Resin (수용성 수지처리 직물의 물성변화)

  • Kwon, Yoon-Jung;Lee, Mun-Soo
    • Fashion & Textile Research Journal
    • /
    • v.3 no.4
    • /
    • pp.357-361
    • /
    • 2001
  • This paper is concern with the effect of various conditions on mechanical properties of textile fabrics by water soluble resin treatment. Resin treatment of cotton, acetate, viscose rayon, polyester, nylon and acryl fabrics were made by aqueous resin treatment to improve the mechanical properties. The mechanical properties of fabrics, the breaking strength and strain were measured and surface reflectance was measured by color eye. The breaking strength and surface reflectance of fabrics by water soluble resin treatment showed difference by the different treatment concentration. The surface reflectance was increased by water soluble resin treatment. The breaking strength was lower in fabrics with resin treatment than fabrics with none treatment.

  • PDF

COMPARATIVE STUDY ON THE CASTABILITY OF VARIOUS ALLOYS FOR PORCELAIN-FUSED-TO-METAL CROWN (도재소부전장주조관(陶材燒付前裝鑄造冠)에 사용(使用)되는 각종(各種) 합금(合金)의 주조성(鑄造性)에 관(關)한 비교연구(比較硏究))

  • Lee, Tae-Ho
    • The Journal of Korean Academy of Prosthodontics
    • /
    • v.18 no.1
    • /
    • pp.87-97
    • /
    • 1980
  • To compare the castability of various alloys popularly used in Korea for porcelain-fused-to-metal restorations, author selected Degudent G as precious alloy, J.P. 92 as semiprecious alloy and Vera Bond, Rexillium III, Unit Bond, Fine Bond as non precious alloys. With nylon lines and gauge waxes, author made the wax patterns for the castability comparison test. In the same conditions, wax patterns were invested, burned out and cast. Author obtained the following results from this study. 1. The castability of Degudent G as precious alloy for porcelain-fused-to-metal crown and bridge was the best of all. 2. The castability of nonprecious alloys was less than Degudent G as precious alloy, but their differences were not large. 3. The castability of Rexillium III is the best of all nonprecious alloys and that of Vera Bond, Unit Bond had nearly the same results. 4. Semiprecious alloy (J.P. 92) was less castable than nonprecious alloys.

  • PDF

Characterization of Surfaces by Contact Angle Goniometry - II . Effect of Curvature on Contact Angle - (접촉각 측정에 의한 표면의 특성연구( II ) -섬유나 막대의 직경이 접촉각에 미치는 영향-)

  • Park Chung Hee
    • Journal of the Korean Society of Clothing and Textiles
    • /
    • v.15 no.4 s.40
    • /
    • pp.437-445
    • /
    • 1991
  • The effect of diameter of rods or fibers on contact angle was studied in a vertical rod configuration. A contact angle measuring device described in the previous paper was optimized for the measurement of small-diameter fibers. It was shown that contact angles of water and hexadecane on nylon 6 monofilsments and glass rods increased with decrease of diameter below a critical diameter, which varied from one system to another. Beyond the critical value, contact angle of the liquid on the vertical glass rod reached to an equilibrium value which is equal to the unique value of the contact angle of the liquid drop on the horizontal glass plate.

  • PDF

A Study of Women's Incontinence Panties with Anti-aging Effect (항노화 패션을 위한 여성 요실금 팬티 연구)

  • Koo, Mi-Ran
    • Journal of the Korea Fashion and Costume Design Association
    • /
    • v.18 no.1
    • /
    • pp.51-60
    • /
    • 2016
  • This study aims to contribute to development of women's incontinence panties with anti-aging effect meeting customers' requirements by examining types, sorts, sizes and specifications of women's incontinence panties currently sold in the market. The results of analysis of a total of 22 commercial products are as follows. 1. Among the samples, 21 incontinence panties were slip on type like regular underwear; only 1 was pad insertion type. With respect to the length of side seam, 17 (77.3%) incontinence panties were above 14 cm which is classified as maxi; the rest of them (5, 22.7%) were 7~11 cm which is classified as middy. 2. With respect to size, the percentage of Size 3 was 40.9% showing the largest, followed by Size 4 (31.8%), Size 2 (18.2%), Size 5 (9.1%). To produce the incontinence panties considering various ages and body shapes, it is recommended to select above Size 4 as a minimum. 3. With respect to materials of the incontinence panties, natural fibers such as cotton or rayon were mostly used and a polyurethane, nylon or polyester was mixed to enhance the wearing sensation and stretchability of the panties. Finally, for structure of the crotch area, single knit was the largest (9, 40.9%), terry weave 7 (31.8%), sofe pile weave 4 (18.2%), and waffle weave or diamond weave 2.

  • PDF

Production of monoclonal antibody(MAb) for lymphocytes of Korean native cattle 2. MAb to E-rosette forming lymphocytes. (한우 림프구에 대한 단일항체 생산 2. E-rosette형성 림프구에 대한 단일항체)

  • Song, Hee-jong;Woon, Jae-ho;Kim, Tae-joong
    • Korean Journal of Veterinary Research
    • /
    • v.35 no.4
    • /
    • pp.777-783
    • /
    • 1995
  • A monoclonal antibody(MAb), KCT-23ER, with specificity for E-rosetted T cells of Korean native cattle was prepared by cell hybridization of myeloma P3/NS-1/1-Ag-4-1 and spleen cells from BALB/c mice hyperimmunized with E-rosetted lymphocytes. The isotype of KCT-23ER to T lymphocytes was mouse $IgG_{2b}$. KCT-23ER was reacted with 53.6% to peripheral blood lymphocytes and with 67.8% to nylon wool nonadherent blood lymphocytes. And it was reacted with 72.2%, 59.2% and 35.3% to thymocytes, prescapular lymph node cells and splenocytes, respectively. Immunocytological reactive rates to E-rosetted and non-E-rosetted cells were 72.5% and 22.4%, respectively. These results indicated that KCT-23ER reacted to E-rosetted cells was one of the MAb for investigate of $CD_2$ receptor positive cell subset in the Korean native cattle.

  • PDF

Protected (bypass) Protein and Feed Value of Hazelnut Kernel Oil Meal

  • Saricicek, B.Z.
    • Asian-Australasian Journal of Animal Sciences
    • /
    • v.13 no.3
    • /
    • pp.317-322
    • /
    • 2000
  • In situ and in vivo digestion trials were conducted to determine the degradation of dry matter (DM), crude protein (CP) and effective protein degtadability (EPD), and digestibility of nutrients of Hazelnut kernel oil meal (HKOM), and effects of HKOM on nitrogen (N) balance. In the in situ study, nylon bag were suspended in the rumen of 3 Karayaka rams to estimate protected protein. Protein sources were analyzed for pepsin soluble protein (PSP) using a Pepsin Digestion Method. In the digestion trials, 4 Karayaka rams (36 mo.) were used in a $4{\times}4$ Latin square to evaluate the digestibility of nutrients and N retention to measure effects of diets containing HKOM, soybean meal (SBM) corn gluten meal (CGM) and urea (U). The degradability of DM and CP, and PSP content of HKOM were lower (p>0.05) than that of SBM, but higher (p<0.001) than that of CGM. EPD of HKOM was higher (p<0.01) than that of SBM or CGM. The apparent digestion coefficients of organic matter and CP for HKOM were lower than for SBM, but higher than for CGM. N retention of HKOM was higher than that of SBM and lower than that of CGM (p>0.05). In conclusion, these data may indicate that the HKOM is a high digestible feed source with a value between SBM and CGM.

Preparation of Spin Finish for Synthetic Fiber (합성섬유용 방사유제의 제조에 관한 연구)

  • Kim, Sung-Gea;Shin, Jae-Hyun;Ha, Kyung-Jin;Kim, Sang-Bum;Park, Hong-Soo
    • Journal of the Korean Applied Science and Technology
    • /
    • v.14 no.1
    • /
    • pp.53-59
    • /
    • 1997
  • Spin finish(NSFs) for synthetic fiber were prepared. NSF-3 was proved to be the best spin finish by testing the properties and emulsion stability, etc. of NSFs. NSF-3 prepared by blending of spindle oil 70g, paraffin wax 10g, glyceryl mono-oleate 5g, POE(10) nonylphenyl ether 4g, POE(20) sorbitan tri-oleate 4g, Na-dioctyl sulfosuccinate 4g, antistatic agent 2g and water 1g was excellent in its characteristics. Optimum physical conditions of nylon filament treated with NSF-3 according to the number of revolution of oil roller were obtained at conditions of 5.5rpm in the number of revolution of oil roller, 1.21% of oil pick up, and denier 69.2D.

Studies on the Rancidity of Pacific Saury, Cololabis saira Kwamaegi on the Storage Temperatures and Durations (저장온도와 저장기간에 따른 꽁치과메기의 산패도)

  • Lee, Ho-Jin;Oh, Seung-Hee;Jeong, Ji-Suk;Choi, Kyoung-Ho
    • The Korean Journal of Food And Nutrition
    • /
    • v.21 no.4
    • /
    • pp.477-484
    • /
    • 2008
  • The Pacific saury, Cololabis saira Kwamaegi, is a traditional local food of the Eastern sea area, centered around Pohang. It is well-recognized as being both tasty and nutritious. Nevertheless, bacterial contamination, excessive dryness, and compositional changes render this fish edible only during the winter months. Thus, to improve its storage capabilities, this study assessed the effects of storage material, type, temperature, and duration on compositional changes in Kwamaegi. The assessed samples were Kwamaegi which had been naturally dried for 15 days. The storage materials included an A-film, a self- developed multi-film made of polyethylene, polyamide, EVOH, and polyethylene, and a B-film made of polyethylene, nylon, polyethylene, nylon, and polyethylene. The B films were utilized after pressing and lamination. The storage types included one whole fish(1G), or 2 divided fish(2G), to increase eating convenience. The 2G type was the muscle portion divided vertically after discarding the jowl, skin, and internal organs. The storage temperatures were 0, -15 and $-30^{\circ}C$, and the storage durations were 2, 4, and 6 months. Among the lipid rancidities, acid value and peroxide value showed the highest level of initial rancidity at a storage temperature of $0^{\circ}C$ for 2 months. We noted no significant differences between storage materials. The lower the storage temperatures, the less acid and peroxide were generated. Between the storage types, 1G evidenced lower less acid values than 2G. The TBA values revealed a dramatic increase at a storage temperature of $0^{\circ}C$ for 2 months, whereas this rapid progress was not observed at storage temperatures of -15 and $-30^{\circ}C$. Along with the acid value and peroxide value, the samples stored at 0, -15 and $-30^{\circ}C$ evidenced significantly lower TBA values. The B-film evidenced a slightly lower TBA value than was observed in the A-film, but no significant differences were observed.

Effect of Fiber Types on Fundamental Properties of Pavement Concrete (섬유 종류가 도로포장용 콘크리트의 기초적 특성에 미치는 영향)

  • Han, Cheon-Goo;Park, Jong-Sup;Jung, Woo-Tai;Jeon, Kyu-Nam
    • Journal of the Korea Concrete Institute
    • /
    • v.22 no.4
    • /
    • pp.473-479
    • /
    • 2010
  • The objective of the paper is to experimentally investigate the effect of commercially avaliable fiber types such as polypropylene (PP), nylon (NY), polyvinyl alcohol (PVA) and cellulose (CL) on the engineering properties of concrete for pavement application. The results, showed the fluidity tends to decrease with fibers addition compared to that of plain concrete. As for the effect of fiber types on fluidity loss, use of NY appear to give the most favorable results among all of the fiber types investigated in this study while the effect of the fibers on air content was negligible. For the properties of hardened concrete, compressive and flexural strengths increased with fibers compared to plain concrete. The contribution of NY fibers to strength was the highest followed in the order by NY, PVA, PP, and CL. However, in the case of the splitting tensile strength, its values were increased with NY and PP only. For porosity based on MIP(mercury intrusion penetration) method, the number of around 1 was observed when NY was mixed resulting in increased cumulated amounts of porosity compared with that of plain mix. Thus, based on the consideration of fluidity and strength it was found that the addition of NY fiber showed the optimal results under the conditions applied in this study.