Yuav ua li cas fiberglass bond resin? Nws yog txhua yam ua tsaug rau ib txheej tsis pom ntawm cov kua nplaum.

I. Tsis muaj Sizing Agent, Fibers thiab Resin "Tsis txhob tawm tsam ib leeg"

Fiberglassmuaj ib tug du nto, zoo li nyias iav rods. Resin (epoxy, polyester, thiab lwm yam) yog cov kua polymer. Yog tias cov fiberglass huv tau tsau ncaj qha rau hauv cov resin, lawv tuaj yeem "ko" ua ke tom qab kho, tab sis lub zog sib txuas tsis muaj zog heev. Thaum rub tawm, cov resin thiab fiber ntau yuav "sib cais," thiab lub zog fiber ntau tsis tuaj yeem siv tag nrho.

Qhov teeb meem yog dab tsi? Qhov saum npoo ntawm fiberglass yog hydrophilic (muaj ntau ntawm -OH hydroxyl pawg), thaum resin yog hydrophobic. Ob qho khoom siv yog "tsis sib haum" thiab tsis tuaj yeem sib koom ua ke.

II. Sizing Agent: Ib qho Molecular-Level "Glue"

Tus neeg sawv cev sizing yog tus neeg sawv cev kho mob ncaj qha coated rau ntawm qhov chaw fiber ntau thaum lub sij hawm txheej txheem fiberglass. Tom qab cov fiberglass tau kos los ntawm cov stencil, nws tam sim ntawd dhau los ntawm cov txheej txheem txheej (roj), qhov twg nyias txheej ntawm sizing tus neeg saib xyuas - thinner dua ib cov plaub hau thiab me me (feem ntau tsuas yog 0.5-2% ntawm fiber ntau qhov hnyav)- yog sib npaug rau ntawm qhov chaw. Tus neeg sawv cev sizing no ua zoo li "ob-ib daim kab xev"-ib kawg "grips" lub fiberglass, thiab lwm qhov kawg "grips" cov resin, tsim kom muaj zog tshuaj bonds ntawm fiber ntau thiab resin.

III. Dab tsi yog Sizing Agent?

Tus neeg sawv cev sizing tsis yog ib feem, tab sis "formulaic ua ke" ntawm ntau yam tshuaj:

Coupling Agent (Core): Cov khoom tseem ceeb tshaj plaws, feem ntau yog silane coupling tus neeg sawv cev. Nws reacts nrog cov hydroxyl pawg ntawm fiberglass nto ntawm ib kawg thiab nrog cov resin molecules ntawm lwm yam, tsim ib tug "molecular choj" ntawm lawv.

Zaj duab xis-forming Agent: Tsim ib zaj duab xis tiv thaiv ntawm fiber ntau, tiv thaiv fiber ntau abrasion thiab txhim kho fiber ntau cohesion (tiv thaiv cov fibers los ntawm unraveling).

Lubricant: Txo kev sib txhuam kev puas tsuaj rau cov fibers thaum spinning thiab weaving.

Antistatic Agent: Tiv thaiv cov fibers los ntawm "frizzing" vim hluav taws xob zoo li qub thaum ua.

IV. Tus neeg saib xyuas tsis zoo txhais tau tias cov fibers puas

Qhov zoo ntawm tus neeg sawv cev sizing ncaj qha txiav txim siab lub siab ntawm cov fiberglass lub zog. Txawm hais tias muaj zog npaum li cas ntawm cov fiber ntau, yog tias nws tsis "daim ntawv cog lus" ruaj khov nrog cov resin, lub zog tsis tuaj yeem kis tau, ua rau cov fiber ntau tsis muaj txiaj ntsig. Yog hais tias tus neeg sawv cev sizing tsis siv kom raug, lub zog sib txuas ntawm cov fiber ntau thiab cov resin yuav txo qis los ntawm 30-50%, thiab lub zog dabtsi yog khoov thiab shear zog yuav poob.