NGHIEN cuu-TRAODOI NGHIEN CU'U CAC THONG S6 CONG NGHE Dt N A N G CAO CHAT LU'ONG GLTNG SAY TREN THiiT Bj SAY TINH Vl NGANG S T U D Y O N T E C H N O L O G I C A L P A R A M E T E R S T O I M P R O V E T H E QUALITY O F D R I E D G I N G E R O N FLAT-BED D R Y E R Phgm Thj Minh Hue Truang Dai hoc Cong nghiep Ha Noi T M TAT Bdi bdo xdc dinh dnh huang cua phuong phdp sdy doi luu cuong bUc din chdt lugng sdn phdm, mdu sdc cua gimg di tim chi sdy phii hgp tren thiit bi sdy tinh vi ngang tgi nhtet sdy tir 70^80°C, tdc dong sdy v = 0,4-^ 0,6(m/s) vddg ddy lop vgt lieu sdy I = 30~40 (cm) den kho khong deu cua sdn phdm sdy K = 2-^2,51 (%), diem tong hap chdt lugng sdn phdm say Q-17^I8 (d), thai gian sdy t = ^ 8,4 0i) Kitqud tgo sdn phdm gung sdy co chdt luang cao ddm bdo nhu cdu tiiu diing nuac vd xudt khdu Vai kit cdu thiet bi dgng modun, co the su dung mo hinh dong dgng de thiet ke cdc mdy co ndng suat lan han tir -^2 tan/me, nhdm ddp ung nhu cdu cua sdn xudt doanh nghiep Tir khod: Cong nghe, che sdy, gimg, sdy tinh vi ngang, chdt lugng ABSTRACT This paper investigated the effect of forced convection drying on the quality and color of ginger toflnd out the suitable drying method on flat bed dryer at drying temperature from 70 -^ SO'C, the airflow rate ofthe drying product v = 0,4-^0,6m/s, the thickness ofthe drying material = 30^ 40 cm, the dryness ofthe drying product K = 2-^2.51%, the Synthesized quality of dried products Q ^ 17^18(d), drying timet = ^ 8,4(h) As the result, high quality dried ginger is produced to meet domestic consumption and export demand With modular equipment, it is possible to use the same model to design machines with a capacity of between and tons per batch to meet the needs of enterprise production Keywords: Technology, drying mode, ginger, flat-bed drying, quality ISSN 0866 - 7056 TAP CHi CO KHi VIET NAM, S6 nam 2017 www.cokhivietnam.vn NGHIEN CU'U-TRAODOI DAT VAN DE Do am ban dau cua gimg la 50,5% Nhien lieu sir dung la nang lugng than da Gung la loai gia vj quy cac mon an va ia mot vi thuoc co cong dung hxhi hieu y hpc co truyen de chua cac benh nhu: Tru cam mao phong han, hosuyen, [l,2] Ngoai ra, gimg la nguyen lieu de san xuat cac san pham nhu: Miit gijmg, ruau gimg, keo gimg, tra gung, Day la loai cay rAt de song va sinh truang tot nen diSn tich gung a nuoc ta cang tang, nhien o mien Bac CO ba thang 1-3, am rat cao nen gimg cii bi mam gay moc, hong, khong bao quan can than gay lang phi nguon nguyen lieu rat Ion De giam bot ton that gimg sau thu hoach, nganh thuc pham co cac ca sa say kho nong san hien dai "say sach", nhu say gian tiep,.-Nhung nhieu ca sa siy gimg van dang sir dung 16 say thu cong, dung true tiep khoi 16 lam tac nhan say Vi vay, gung say kho kem chat lugng, bien mau, n^ng miii khoi 16, siic khoe nguoi van hanh bi anh huong Tai cac ca sa san xuat a dia phuang thuang c6 lgi the ve dien tich mat bang, tac gia lira chon phuong an bu6ng s4y xay bSng gach, k6t hgp trang bi 16 dot cai tien voi phuang phap "say sach" Khi nong nho bg phan trao d6i nhiet (calorife) quat cao ap day tac nhan say di qua lap vat lieu va c6 the chu dong dieu tiet nhiet dp say de nang cao chat lugng ciia san pham say dam bao an toan thuc pham nang cao siic cgnh tranh san phSm gung sdy kho phuc vii ngi tieu va xuat khau VAT LIEU NGHIEN CUtl VA PHU'ONG PHAP Vat lieu thi nghi&m: Gimg tuai thucmg pham co chieu dai trung binh 20 ^ 22cm, duang kinh tmng binh -r 5cm, kh6i lupng trung binh 350 -450g Kh6i lugng mgt me s4y tir 750-^850kg gung turn Thiet bi thi nghi&m: La may say tinh vi ngang SV-800 c6 nang sudt ttr 750-^800 kg/me gimg tuoi, ViSn Co dien Nong nghiep va Cong nghe Sau thu hoach thiet kS [3] May c6 cdu tao don gi^n, chac chAn, dl van hanh, thdo lip dk di chuyen giua cac co so san xudt May co the diing de say cac loai nong san nhu gimg, rieng, hanhtSy, gom cac bg phan chinh sau: Hinh Thiit bi sdy tinh vi ngang - 800 • I) Qugt; 2) Cda hod khi; 3) CUa cho than; 4) Cira lay xi; 5) Ld dot vd buong hod khi; 6) Sdn sdy; 7) Budng nhiit; 8) Buong sdy; 9) Dong hd nhiet Phuvng phap nghign cii-u: Sau xem xet va phan tich tinh chat CO, ly hoa cua cu gimg, cac dieu kien cu the, dua vao k6t qua nghien ciiu say rau qua cua cac nha khoa hpc truac [4,5,6], tac gia da sir dung phuang phap thuc nghiem voi quy trinh cong nghe sdy bet nham nghien ciiu mpt s6 thong s6 dS nang cao chat lugng san pham gimg kho sau say voi dieu kien thi nghiem nhu sau: Nhi?t moi tru6ng ban SO^C, ban dem 26''C Do km tuang doi kh6ng la 70% Gimg duac trai tren cac san say Bo tri'^ ISSN 0866 - 7036 TAP CHi CO KHi VlfiT NAM, So nam 2017 NGHIEN CU'U-TRAOD6| cac miic thi nghiem theo nhiet dp dong say, b6 day lop giing lat, toe d6ng say phu hgp voi chat lugng san pham va su van hanh he thong [7] lugng chat kho, dp kho khong deu, diem t6ng hgp chat lugng cam quan, kha nang tach am, th6i gian say KET QUA THAO LUAN 3.1 Anh hirorng ciia nhi^t toi chi tieu chdt lirgmg cam quan san pham Tac gia da tien hanh thuc nghiSm tai cong ty doanh nghiep tu nhan Luyen Thu thugc xa Tan Viet, Thanh Ha, Hai Duong Muc tieu thi nghiSm xet anh huong ciia mgt so thong so cong nghe den chat lugng san pham nhu ham Dieu kien thi nghiem: Van toe tac nhan say 0,8m/s, nhiet dp moi truang 30"C, chifiu day lap v^t lieu 40cm Nhiet dp s5y khao sat pham vi tir 60 - 90 °C, nhu bang va hmh Bdng Anh huang cua su thay ddi nhiet dp tai chdt luang sdn phdm: Nhigt d$ Ham luong tinh d^u(% chdt khd) Digm Mau sac Mota Biem Mota Diem Md ta Dilm Mui Vicay Hinh dang M5ta 60''C 70''C 80''C 90»C 0,36 0,38 0,34 0,30 4,85 Vo nau nhat, loi vang xam nhe 3,22 Huong nong nhe 4,21 Vi cay nong 3,15 Gimg kho deu, hai cong 2,1 Vo mau xam, loi nau xam 2,10 Huong nong 1,95 Vl cay gat 1,92 Bi cong venh co cho bi CO dum 3,3 4,21 Vo nau, Vo nau xam, loi nau hoi nhctt loi vang sang 4,52 4,89 Huong nhe HuoTig dac tnmg 3,2 4,88 Chua ro vi cay Vi cay dac trung 4,21 4,85 Deu dep, can doi, Mieng gimg hoi mem deu dep, can doi • MlullclMx) BMiXdiATiJ • Hinh Diem chat luang cdm quan nhiit sdy tir 6(fC ^ 90 °C ISSN 0866 - 7056 TAP CHi CO KHi VlfiT NAM, S6 nam 2017 www.coldiivietnam.vn NGHIEN cuu-TRAO OOl Theo k6t qua khao sat bang va biSu d6 cho thdy, nhi6t tang tir 60 - 90°C thi diem chat lupng cam cua gung sdy co xu huong giam voi khoang each kha ro ret Vai nhiet sdy 70''C- SO-C thi gimg sdy kho co mau vang sang, huong thom, vi cay dac tnmg, mieng gung can doi d§u dep voi diem tong hgp chdt lugng san phdm la t6t nhdt tir 17 ^ 18 diem Ham lugng tinh ddu bao t6n tir 80 -^ 90% so vai say doi luu tu nhien 3.3 Anh huonng cua toe dong tac nhSn say am cua giing sdy Trong qua trinh thuc nghiem giii chifiu day lap vat lieu 40 cm, nhiet dp sdy 70°C, van t6c tac nhan sdy bifin thien tu 0,2 - 0,8m/s (hinh 4) 3.2 Anh hirong ddy vat lieu den Idia nang tdch am cua gung sdy Dieu kien thi nghiem: Van toe tac nhan say 0,8m/s, nhiet dp sdy 70''C chieu day lop vSt lieu khao sat pham vi tir 10 -^ 50 cm, dao gimg sau 3h, 6h say (hinh 3) Qua d6 thi hinh cho thay, chieu day lop vat lieu cang day thi cuang dp thoat am cham Vat lieu day can tra luong nong di chuyen lam cho qua trinh trao d6i nhiet kho khan Do day lap vat lieu tir 40 -^ 50cm tra len thi qua trinh thoat am rdt kem lam cho thoi gian say len toi 12h, san pham co dp kho khong dong dfiu Khi lap vat lieu qua mong thi luong nong thoat kh6i be mat vat lieu rat nhanh lam giam nang suat cua thiet bi Nghien ciiu cho thay, vai dp day lap vat lieu tir 30 -^ 40cm thi kha nang tach am la tot nhdt, dp kho kh6ngdeuK = - % Hinh Dudng cong sdy chiiu ddy vgt lieu thay doi tie 10 - 50 cm Hinh Ducmg cong sdy van tdc ldc nhdn sdy bien thien tir 0,2 - Im/s: Ket qua cho thay: Khi toe dp dong tac nhan sdy cang tang thi kha nang thoat dm cua vat lieu la cang nhanh, qua thi ta thay, t6c dong tac nhan say 1,0 m/s, thi thai gian say la gia nhung hinh dang gimg say bi cong, vfinh, mau nhat lam diem chat lugng cam quan giam xuong, chi phi nhien lifiu tang Ngugc lai, toe dp d6ng tac nhan say cang nho thi thoi gian say cang dai Khi v ^ 0,2m/s, thi thai gian say la 12 (gia), mifing gimg can doi nhung mem, mau nhgt Vai van toe v = 0,4 -^ 0,6m/s, thi gimg say kho co thoi gian say tir -^ 8,4h, diem chat lugng cam quan la tot nhat vol khong dong dfiu cao nhat (hinh 5) Hinh Gimg kho dugc sdy hdng thiet bi sdy tinh vi ngang '' ISSN 0866 - 7056 TAP CHi CO KHi VIET NAM, S6 nam 2017 wwn'.cnkhiviol-nnm NGHIEN CU'U-TRAO DCI KET L U ^ N Tai lieu tham khao: Ket qua say gimg trfin thifit bi say tinh vi ngang da lua chgn dugc cac thong so c6ng nghfi nhu: Nhiet tac nhan say la T= 70 -^ 80''C, t6c tac nhan sdy v = 0,4 -^ 0,6m/s va dp day lap vat lifiu say = 30 - 40cm, de gung say CO diem tong hgp chat Iupng san pham say Q ^ 17-^ 18(d), thai gian say ngan t ^ 8-^ 8,4(h), ham lugng tinh dau sau say bao ton tir 80 - 90% Thifit hi sdy tinh vi ngang - 800 CO kfit cau don gian, giam dugc dang kfi th6i gian say va chi phi lao dpng phuc vu cho viec van hanh thifit bi, ma mgt huong moi cho viec phat trifin say rau, cii, h^n chfi ton that sau thu hoach.*;* Ngay nhan bai: 10/6/2017 Ngay phan bifin: 18/6/2017 [I]- http;//www.caythuocquy.com/gung/76-dunggung-thuong-xuyen-loi-cho-suc-khoe.html [2] Do Tat Lgi; Nhung cay thuoc va vi thudc Viet Nam (trang 366-367) [3] Bach Quoc Khang va cac cOng su (2004); Nghiin ciru xdy dung quy trinh cong nghe vd thiet bi bdo qudn che biin mgt sd rau qud luai CO quy mo vira vd nhd, Bao cao tong ket de tai cap Nha nuac, Vifin Co dien N6ng nghiep va Cong nghe sau thu hoach Ha Nol, Tr 21, 62-64, 285-291 14] Luu Duan, Le Bach Tuyet, Ha Van Thuygt (1996); Cdc qud trinh cong nghi ca bdn sdn xudt thirc phdm, NXB Giao due, Ha N6i Quach DTnh, Nguyen Van Tigp (2008); Bdo qudn vd chi biin rau qud, NXB Khoa hpc va Ky thuat, H^ Npi, Tr, 230 -242, [6] Pham Anh Tuan (2010); "Nghien ciru qud trinh cdng nghe sdy de ndng cao chdt luong sdn phdm mgt so rau qud Viet Nam bdng cong ngi sdy bam nhiif, Lu|n an Tien si ky thuat, Trucmg Dai hgc Bach Khoa Ha Ngi [7] Hoang Van Chuoc (1999); Ky thudt say, NXB Khoa hgc Ky thu§t Hi N6i [5] ISSN 0866 - 7056 TAP CHi CO KHi VlfiT NAM, S6 nam 2017 www.cokhivietnam.vn NGHIEN CU'U-TRAO D | KHAO SAT DO BEN KEO Bin vA DO BEN XE CUA VAI PE/CO VA VAl PEA^I d TRANG THAI KHO VA U'CT INVESTIGATION OF TENSILE STRENGTH AND TEAR RESISTANCE O F P E / C O A N D P E / V I F A B R I C IN D R Y A N D W E T STATE Truwig Thanh Giang'^ Nguyln Nhat TrinhS Cao Thi Hoai Thuy^ 'Tru6ng Dai hgc Cong nghifip Det may Ha Ngi ^Truang Dai hgc Bach khoa Ha Ngi TOM TAT Vdi polyeste pha bong-Pe/Co 65/35 duac sir dung rgng rdi doi vol cdc sdn phdm vdi may mgc vd vdi ky thugt cugc song sinh hogt hdng ngdy Vdi Pe/Co co ben tuang doi cao vd khd ndng hut dm tot De gidm gid thdnh sdn phdm, hien doi vol mgt so sdn phdm may mgc, cdc nhd sdn xudt su dung xa visco thay thi cho xa bong de pha vai xa polyeste Tuy nhien, xa visco bi gidm dg bin a trgng thdi uat, do ldm gidm hieu qud su dung cdc sdn phdm tir vdi polyeste pha visco-Pe/Vi Bdi bdo khdo sdt ddnh gid bin keo gidn vd dg ben xe hai logi vdi Pe/Co vd vdi Pe/Vi a trang thdi kho vd trgng thdi uat Kit qud khdo sdt cho thdy, vdi Pe/Co a trgng thdi uat bin keo dut tdng tir l,5%-5,9% so vai a trgng thdi kho, nhung vdi Pe/Vi a trgng thdi uat co ben keo dirt gidm tir 3,4%-4,9% so vdi a trgng thdi kho Do bin xe cua vdi Pe/Co vd vdi Pe/Vi a trgng thdi uat gidm nhiiu so vai a trgng thdi kho, mirc gidm ben xe vdi Pe/Co khodng tir 22,6%-27,9%, mure gidm ben xe vdi Pe/Vi rdt ldn tir 41,9-45,2% Tix khoa: Vdi Pe/Co; Vdi Pe/Vi; Do ben keo diit; Do bin xe ABSTRACT Polyester/Cotton-Pe/Co fabric 65/35 is widely used for producing apparel and engineering products in daily life, Pe/Co fabric has got a fairly high strength and a good moisture absorption In order to reduce products cost, at present for some apparel products viscose fiber is used instead for cotton fiber mixing to polyester fiber However, wet strength of viscose fabric is decreased and that makes polyester/viscose (Pe/Vi) products get low efficiency The article investigates tensile strength and tear resistance of Pe/Co and Pe/Vi fabrics in dry and wet state The results show that for Pe/Co fabric wet tensile strength is 1.5%-5.9% higher than dry one, for Pe/Vi fabric wet tensile strength is 3.4%-4.9% lower than dry one Wet tear resistance of Pe/Co and Pe/Vi fabrics is much lower than dry one, the degree of decreasing Pe/Co fabric's tear resistance is about 22.6%-27.9%, but the degree of decreasing Pe/Vi fabric s tear resistance is very high about 41.9%-45.2% Keywords: Pe/Co fabric, Pe/Vi fabric, tensile strength, tear resistance ISSN 0866 - 7056 TAP CHi CO KHi VIET NAM, So nam 2017 ^ NGHIEN CU'U-TRAOOOI I.DATVANDE Vai polyeste/bong-Pe/Co la vai su dung xa polyeste pha trgn vdi xa bong, vai polyeste/ visco-Pe/Vi la vai su dung xa polyeste pha trpn vai xa visco Viec pha trgn xa polyeste v6i xa bong nhdm muc tieu phat huy iru diem va khac phuc nhugc difim tinh nang sir dung ciia hai loai xa Xo polyeste co nhifiu uu the hon so sanh vai cac loai xo tmyfin thong la CO the chong nuac, chong bui va chong chay, nhung xa khong hiit am Vai polyeste khong bi CO Idii giat, chong nhan va chong keo gian va la vat lieu each nhifit hifiu qua, do no dupc diing de san xudt goi, chan, dem, ao khoac ngoai va tiii ngii Xo bong la m6t loai xa thien nhien, kha manh, mem, co quan tu nhifin nen xa c6 dp xop, dac biet dp bfin dai ciia xa bong kha tot Thanh phdn chu yeu cua xa bong la xenlulo tu nhifin chifim 94%, xa bong co cau tnic chat che va dinh huong cao, do xo bong co kha nang hiit am tot, san pham may mac sir dung xa bong co tinh tien nghi cao Tuy nhien, de giam gia san pham, cac nha san xuat su dung xo visco thay the cho xa bong Xa visco CO cau tnic xop, hau nhu khdng co cac phan kfit tinh Ham lupng a xenlulo xo chifim hon 90% Mat khac, miic dp trung hgp trung binh cua xenlulo xo visco dung cho cong nghiep det chi khoang 300 - 350 nen dp bfin CO hgc cua xo khong cao Do cau tnic xop nen xa mfim mai, co dp gian ldn, dfi tham nuac, dfi truong na nuoc va dfi hap phu thuoc nhupm Xa visco la xenlulo tai sinh nhung he so trimg hgp thap hon nhieu so vai cac xa xenlulo c6 san tu nhifin Cac cong trinh chu yfiu nghifin ciru ve anh hu6ng cua cac thong so dfin bfin cua vai a trang thai kho, rat it cong trinh nghien ciiu a trang thai uot Robert va cpng su [1], nghien cuu tinh dan hoi va mo dun ciia sgi visco a trang thai uat Bryant va Walter [2], xac dinh bfin keo diit cua spi visco dugc ngam nuoc Preston va Nimkar [3] nghien ciiu lire lifin kfit giiia cac xa sgi trang thai uat, khoang each giiia cdc xo vai xudt hien lire thiiy tinh A Das va cgng su [4], nghien ciiu dac tinh dp ben cua cdc spi polyeste pha visco va bong vai ti le pha khac (100% polyeste, 65/35 P/V, 50/50 P/V, 100% visco, 100% bong) voi cdc spi chi s6 NelO, Ne20, Ne30 va Ne40 Bai bao khao sat danh gid dp bfin keo diit va bfin xe vai polyeste/cotton 65/35 va polyeste/visco 65/35 trang thai kh6 vd trang thai uot, hai loai vai deu dugc sir dung de san xuat cac san pham may mac thong dung NGUYEN VAT LIEU VA PHU'ONG PHAP NGHlfiN c t r u 2.1 NguySn v3t liSu Vai mgc dfit dioi Pe/Co 65/35, Cong ty Cfi phdn Det may Nam Djnh san xuat, kifiu det van diem 1/1, mat sgi dgc 275sgi/10cm, mat dp spi ngang 230sgi/10cm, dp manh sgi dgc-sgi ngang N^=20/l, khoi lugng vai: 165g/m^ Vai mgc dfit thoi Pe/Vi 65/35, Cong ty Co phdn Dfit lua Nam Dinh san xuat, kieu det van difim 1/1, mat sgi dpc 515spi/10cmvd spi ngang 300sgi/10cm, manh sgi dgc va spi ngang N^=40/l, khoi lupng vai: 165g/m^ 2.2 Phu-orng phap nghiSn cihi Vdi dugc giat sach ho, bui ban, dau mo bang hot giat Thudn hoa cdc mlu vai difiu kien chudn (dp am R=60±4%, nhifit T=20±2'') 24 gi6 truoc thir nghifim theo tifiu chudn TCVN 1748-2007 ISSN 0866 • 7056 M TAP CHi CO KHi VlfiT NAM, S6 nam 2017 www.cokhivietnam.vn NGHIEN CU'U-TRAOD6I Doi voi thli nghiem trang thai uoi, vai dugc ngam nuac, sau diing kep dua thiiy tinh gat het nuac trfin mat vai Giii vai 24h binh kin, sau xac dinh dp bfin Dp ben keo diit va dp gian diit cua vdi dfit thoi duac xdc dinh theo tifiu chudn TCVN 1754: 1986 Dp ben xe rach cua vai dfit thoi dugc xdc dinh theo tieu chudn ASTM D2261 Thuc nghiem dp bfin keo diit, dp gian diit va ben xe rach vai Pe/Co va vai Pe/ Vi dugc tien hanh tren may keo diit van nang TENSILON Thuc nghiem dupc thuc hifin a dieu kien moi tnrong tieu chuan: Nhifit dp 25''C va dm 65% tai Trung tam Thi nghiem Det may, Truang Dai hgc Bdch khoa Ha Npi KET QUA VA BAN LUAN 3.1 Do hen keo dut va dp gian dut kho va ir6l cua vai Pe/Co va Pe/Vi Kfit qud thi nghiem dp ben keo dirt vai Pe/Co dupc the hien a hinh va dp bfin keo dut vai Pe/Vi dugc the hien a hinh 2, cho thay: Pe/Co dgc Pe/Co ngang Hinh Do ben keo dut khd vd uat cua vdi Pe/Co Pe/Vi dpc Pe/W ngang Hinh Dp ben keo dut kho vd udt cua vdi Pe/Vt Doi voi vai Pe/Co, dp bfin kfio dirt dgc uot tang 5,9% so vai dp ben keo diit dpc kho; dp ben kfio diit ngang uot tang 1,5% so vdi ben keo diit ngang kho Nhu v^y, dp bfin kfio diit vai Pe/co a trang thai uot Ion han dp ben keo dirt a trang thai kho, la vi a trang thai uot xa bong tang bfin xo bi truang na lam tang sir ma sat vai nhau, do ldm tang ben cua spi va tang dp ben keo diit cua vdi Doi vai vai Pe/Vi, dp bfin keo diit dgc uot giam 3,4%, so voi bfin keo dirt dpc kho; dp bfin keo dirt ngang uat giam 4,9% so vdi dp bfin keo diit ngang kho Nhu vay, vai Pe/Vi CO dp bfin keo diit uat nho hon ben keo dut kho, la vi thdnh phan xa visco la xa xenlulo II CO miic dfi polyme hoa thap, dp dinh huang thap va hap thu nuac rat cao va bi giam dp ben a trang thdi uat, han nira be mat xa visco tran nh5n nen trang thai uat giam ma sat vdi nhau, do bfin keo diit uat cua vai Pe/Vi thap ban dp ben keo diit kho Ket qua thi nghiem dp gian diit dgc va gian diit ngang cua vai Pe/Co dugc bieu difin tren hinh cho thay, a trang thai udt gian diit giam: Vai Pe/Co co gian diit dgc uot giam 2,1 % so vdi dp gian diit dgc kho, gian'^ ISSN 0866 - 7056 T^P CHi CO KHi VlfiT NAM, S6 nam 2017 NGHIEN CU'U-TRAO D | diit ngang uoi ldn hon 2,5% so vai dp gian diit ngang kh6 Nhu vay, co thfi thay dp gian dut udi vai Pe/Co giam khong dang kfi so vdi trang thai kho Kfit qua thi nghifim dp gian diit dgc va gian diit ngang cua vai Pe/Vi dugc bifiu difin tren hinh cho thay, a trang thai uot dp gian diit tang: Vai Pe/Vi co gian diit dpc udi Ion hon 10,5% so vdi gian diit dpc kho, dp gian diit ngang uoi Idn hon 6,9%) so voi dp gian diit ngang kho Nhu vay, gian diit uot vdi Pe/Vi tang dang kfi a trang thai udt 3.2 Do b^n x6 dot khd va u6t cua vai Pe/Co va PeA'i Ket qua thi ngiiiem ben xe doc va xe ngang cua vai Pe/Co va vai Pe/Vi duac biSu dien tren hinli va liinh cho thSy: Pe/Co doc Pe/Co ngang Hinh Do ben xe kho vd uat cua vdi Pe/Co 50 40.85 "KtlO Pe/Co dpc iLfot 40 - Pe/Co ngang 3158 *30 c Hinh Do gian dut kho vd uat cua vdi Pe/Co > 70 • Kho 60 ^ 50 ^30 O 20 10 Pe/Vi dQC Pe/Vi ngang Hinh Dg ben xe khd vd uat cda vdi Pe/Vi 10 PeA/idoc • •• H23.70 ^B7.29 ,,41,49"" PeA/i ngang Hinh Bo gian diet kho vd uat ciia vdi Pe/Vi Doi vai vai Pe/Co, dp bfin xe dgc uot giam 22,6% so vai dp bfin xfi diit dgc kho; bfin xe ngang udt giam 27,9% so vdfi dp bfin xe ngang kho Nhu vdy, vai Pe/Co c6 bfin xe udt nho hon bfin xfi kho Khi chiu luc xe xo ISSN 0866 - 7056 TAP CHi CO KHi V I £ T NAM, S6 nam www.cokhivietnam.vn 2017 NGHIEN CU'U-TRAOD6| bi cat ngang true xa, a trang thai uoi xa bong truang no nen de bi dt, do dg ben xe ciia vai Pe/Co giam dp gidm dp gian diit vai Pe/Co khong dang kfi khoang tur 2%-2,5%, miic dp tang dp gian diit vai Pe/Vi dang kfi khoang tu 6%-10% Doi vdi vai Pe/Vi, bfin xe dgc uot gidm 45,2% so vdi dp bfin xfi dpc kho; dp ben xe ngang udt giam 41,9% so vai dp ben xe ngang kho Nhu vay, vai Pe/Vi dp ben xe gidm rdt nhifiu a trang thai udi Dp bfin xe dpc va xe ngang udi cua vai Pe/Co va vai Pe/Vi giam so vai dp bfin xe dgc va xe ngang kho Miic gidm bfin xe vai Pe/Co khodng tii 22%-28%, miic gidm ben xfi vai Pe/Vi rdt ldn tir 41-45% • KET LUAN Ngdy nhdn bai: 15/5/2017 Ngdy phan bifin: 12/6/2017 Kfit qud nghien ciiu thuc nghiem c6 thfi dua kfit ludn sau: Tai lifiu tham khao: Vai Pe/Co bfin keo diit dgc va kfio dut ngang udi Ion hon ben keo diit dgc va keo diit ngang kho Vdi Pe/Vi dp ben keo diit dpc va keo diit ngang uot nho hon dp bfin keo diit dpc va keo diit ngang kho Miic d6 tang dd bfin keo diit vai Pe/Co khoang tii %-6%, miic dp gidm dp bfin keo diit vai Pe/Vi khoang tir 3%-5% [1] [2] [3] [4] Vai Pe/Co co dp gian diit dgc va ngang udt gidm so vdi dp gian diit dgc va ngang kho Vai Pe/Vi c6 gian diit dpc va ngang udt lan hon so voi dp gian diit dgc va ngang kho Miic Robert A, Gill & Richard Steele The resiliency and modunlus of viscose rayon as a functions of swelling and temperature, J.Appl Polym Sci.5(17) (1991) 589-600 Bryant G M & Walter A T, Text Res J, 29 (1989) Preston J M & Nimkar M V, J Text Inst, 43, (1992) T402 A Das, S M Ishtiaque, S Singh & H C Meena, Tensile characteristics of yam in wet condition, Indian Juoraal of fiber & textile research, vol.34, 2009 ISSN 0866 - 7056 TJyP CHi CO KHi VIET NAM, So nam 2017 ... diit dgc va kfio dut ngang udi Ion hon ben keo diit dgc va keo diit ngang kho Vdi Pe/Vi dp ben keo diit dpc va keo diit ngang uot nho hon dp bfin keo diit dpc va keo diit ngang kho Miic d6 tang... Vai Pe/Co co dp gian diit dgc va ngang udt gidm so vdi dp gian diit dgc va ngang kho Vai Pe/Vi c6 gian diit dpc va ngang udt lan hon so voi dp gian diit dgc va ngang kho Miic Robert A, Gill &... (calorife) quat cao ap day tac nhan say di qua lap vat lieu va c6 the chu dong dieu tiet nhiet dp say de nang cao chat lugng ciia san pham say dam bao an toan thuc pham nang cao siic cgnh tranh