Reference

Effect of Pretreatment with UV Radiation on Physical and Mechanical Properties of Photocured Jute Yarn with 1,6-Hexanediol Diacrylate (HDDA)

Effect of Pretreatment with UV Radiation on Physical and Mechanical Properties of Photocured Jute Yarn with 1,6-Hexanediol Diacrylate (HDDA). Khan, Mubarak A.; Shehrzade, S.; Sarwar, M.; Chowdhury, U.; Rahman, M. M. (Institute of Nuclear Science and Technology, Radiation and Polymer Chemistry Laboratory, Bangladesh Atomic Energy Commission, Gazipur 1000, Bangladesh). Journal of Polymers and the Environment, 9(3), 115-124 (English) 2001 Kluwer Academic/Plenum Publishers. CODEN: JPENFW. ISSN: 1566-2543. DOCUMENT TYPE: Journal CA Section: 40 (Textiles and Fibers) Jute yarns were grafted with a single impregnating monomer 1,6-hexanediol diacrylate (HDDA) to improve the physicomech. properties. Jute yarns soaked for different soaking times (3, 5, 10, and 30 min) in HDDA+MeOH solns. at different proportions (1-10% HDDA in MeOH [vol./vol.] along with photoinitiator Darocur-1664 [3%]) were cured under UV lamp at different UV radiation intensities (2, 4, 6, and 8 passes). Concn. of monomer, soaking time, and intensity of UV radiation were optimized with extent of mech. properties such as tensile strength, elongation at break, and modulus. Enhanced tensile strength (67%), modulus (108%), and polymer loading (11%) were achieved with 5% HDDA concn., 5-min soaking time, fourth pass of UV radiation. To further improve the mech. properties, the jute yarns were pretreated with UV radiation (5, 10, 15, 30, and 50 passes) and treated with optimized monomer concn. (5%). UV-pretreated samples showed the enhanced properties. The tensile strength and modulus increase up to 84% and 132%, resp., over that of virgin jute yarn. An expt. involving water absorption capacity shows that water uptake by treated samples was much lower than that of the untreated samples. During the weathering test, treated yarns exhibited less loss of mech. properties than untreated yarns.

Solid hot-melt radiation-curable ink-jet ink and curing methods

Solid hot-melt radiation-curable ink-jet ink and curing methods. Sasa, Nobumasa (Konica Co., Japan). Jpn. Kokai Tokkyo Koho JP 2003213170 A2 30 Jul 2003, 9 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: ICM: C09D011-00. ICS: B41J002-01; B41M005-00. APPLICATION: JP 2002-15465 24 Jan 2002. DOCUMENT TYPE: Patent CA Section: 42 (Coatings, Inks, and Related Products) Title ink-jet ink, which has sufficient hardenability with low radiation exposure and good adhesion property, contains non-photosensitive color materials, acylphosphine oxide compds., and compds. contg. ethylene type unsatd. groups; different types of initiators are included in the ink compn., and the ink can be cured by exposing to plural radiation. Thus, the ink was composed of coloring material (C. I. pigment blue ), photopolymerizable compds. contg. 15 parts 1,6-Hexanediol diacrylate, 20 parts 2-phenoxyethyl acrylate, 30 parts polypropylene glycol diacrylate, and 25 parts octyl acrylate, photopolymn. initiators contg. 1-hydroxycyclohexylphenyl ketone (Irgacure 184) and monoacylphosphine oxide (Lucirin TPO); and the ink were injected onto recording material, such as paper and PET film to form image, which was then exposed to high pressure Hg lamp, low pressure Hg lamp, and UV fluorescent lamp to be cured.