Sámay is a Visayan word (Hiligaynon and Hiniraya) which means to line with stripes during the process of weaving.

• Comparative Evaluation of Cocoon Properties of Four Bivoltine Silkworm Strains by Adelfa .M. Basaen & Jose J. Josue
• Cleaner Production Technology on the Pretreatment of Greige Cotton Fabric by Charito P. Cauton
• Synthesis of Blue Light-Emitting Polymers via Transition-Metal Catalyzed Hydrosilylation Polymerization by Maritess S. de Leon
• Textile Value of "Yucca" (Dracaena sp.) Fiber by Stela C. Hagad
• Husk of Young Fruit of Cocos Nucifera Linn. as Source of Textile Dye by Daisy C. Lopez
• Pretreatment and Dyeing Technology for Abaca Fibers by Imelda V. Quiros

Comparative Evaluation of Cocoon Properties of Four Bivoltine Silkworm Strains
Adelfa M. Basaen and Jose J. Josue

ABSTRACT

This study aimed to determine the cocoon quality of silkworm, Bombyx mori L. in terms of cocoon weight, cocoon length and width and percent cocoon shell.  Further it investigated the silk filament as to the length, weight, size, percent raw silk, non-breaking length and percent reelability.  The relationship between cocoon weight and size, and percent cocoon shell to silk filament properties were also determined.  The four silkworm strains used (Lat51, B251, Lat51 x B251 and B251 x Lat51) were fed with Native Batac variety of mulberry tree.  

Results of the study indicated that Lat51 x B251 gave the heaviest cocoon weight and longest cocoon length, and B251 x Lat51, the biggest cocoon size.  The four varieties significantly differed in terms of cocoon weight and cocoon size but did not significantly differ in percent cocoon shell.  B251 x Lat51 had the longest length of cocoon filament and non-breaking length of filament, heaviest weight of cocoon filament, highest raw silk and reelability percentage and coarse denier.  Moreover, all the parameters in silk yarn quality significantly differed except in percent reelability.  Cocoon weight and size positively correlated with percent cocoon shell and cocoon filament properties.  In other words, the increase in cocoon weight and size brought corresponding increase in percent cocoon shell and silk filament.  The cocoon and silk yarn quality obtained from the experimental samples are within international standards.

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Cleaner Production Technology on the Pretreatment of Greige Cotton Fabric
Charito P. Cauton

ABSTRACT

Evaluation of different pre-treatment processes was conducted, specifically, the substitution of newly developed auxiliaries involving enzymatic treatment in place of non-biodegradable auxiliaries.  Among the processes evaluated, bioscouring using a pectinase enzyme gave satisfactory results in terms of pollution load, appearance and handle.

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Synthesis of Blue Light-Emitting Polymers via Transition-Metal Catalyzed Hydrosilylation Polymerization
Marites S. de Leon and Dr. Hiroshi Yamashita

ABSTRACT

The hydrosilylation polymerization of diynes with dihydrosilanes proceeded smoothly with Palladium tricyclohexlphosphine (Pd-PCy₃), a combination of Tris-dibenzylidene acetone palladium(ll) [Pd₂-(dba)₃] and Tris-cyclohexylphosphine [PCy₃], catalyst to give the corresponding poly(silylenedivinylene)s in good yields. The polymer structures were characterized by Nuclear Magnetic Resonance (NMR) and Fourier Transform Infrared (FTIR) spectroscopic analyses. Polymers derived from para-substituted diynes showed higher molecular weights than those derived from meta-substituted diynes. Regardless of the substituents on the silicon atom, similar absorption profiles were observed for polymers with para-linkage which absorb at 295-308 nm wavelength. The same is true for polymers with meta-linkage, however, absorption was detected at lower wavelengths.  In dilute solutions, the polymers exhibited strong fluorescence emission in the blue region of the spectrum at l_max 350-500 nm. Results of thermal analysis showed similar decomposition behavior for all the polymers.

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Textile Value of "Yucca" (Dracaena sp.) Fiber
Stela Marie C. Hagad

ABSTRACT

The properties of the fiber "Yucca" (Dracaena sp.) were studied to assess its potential as a possible new source of material for textile.  Major properties investigated were tensile strength, denier, residual gum content and some microscopic characteristics.  The results showed that the properties are comparable if not better than the existing indigenous fibers being used for the development of the tropical fabrics.

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Husk of Young Fruit of Cocos Nucifera Linn. as Source of Textile Dye
Daisy C. Lopez

ABSTRACT

This preliminary study on several properties of the aqueous extract from the husk of the young fruit of Cocos nucifera Linn. (buko) aimed to assess the viability of the buko husk as source of textile dye.  The extract dyed cotton into different hues when used with different mordants.  It is stable to changes in temperature and to traces of metals when in neutral or original pH.  Its concentrated form did not show molds after prolonged storage at room temperature.  The isolated tannin is unstable, and its chromatogram showed that it contains mixtures of dyes.  The results of dyeing and stability tests indicated that buko husk is a good source of textile dyes. However, the instability and complexity of the components of the isolated tannin showed that dyeing reproducibility with  extract will be difficult to attain, and that the isolation, structural identification and modification of the component dyes will be a difficult task.

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Pretreatment and Dyeing Technology for Abaca Fibers
Imelda V. Quiros

ABSTRACT

The study involves optimization of various bleaching and dyeing methods, and comparative evaluation of the process performance.  For blending, the criteria used are whiteness retention, breaking strength and cost efficiency, while for dyeing, colorfastness to washing and light were assessed.  Three bleaching methods namely hydrogen peroxide, calcium hypochlorite and sodium hypochlorite were tried.  Based on the results, the hydrogen peroxide method exhibited the best bleaching performance, for dyeing reactive, direct, basic and disperse dyes were tested and reactives turned out best.

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