Txhua tus paub txog daim txhuam cev. Feem ntau cov sponges rau ntxuav tais diav, rooj zaum cushions, lub rooj zaum nraub qaum, txaj hauv ncoo, cov khoom ua si, thiab puff pleev cov qe hauv peb lub neej txhua hnub yog ua los ntawm daim txhuam cev. Yog tias koj tau pom SpongeBob SquarePants, koj yuav tsum paub tias daim txhuam cev yog cov khoom siv elastic. Cov sponges yooj yim tab sis muaj zog tuaj yeem muab faib ua ntau hom, xws li nco ua npuas ncauj, PU ua npuas ncauj, roj hmab ua npuas ncauj, thiab lwm yam uas feem ntau hnov, tab sis lawv tau siv los ua lub txaj pw. Lub sponge twg yuav zoo dua? Hnub no, kuv yuav coj koj mus rau kev nkag siab zoo txog [daim txhuam cev hauv lub txaj].
1. Cov ntaub ntawv raw ntawm daim txhuam cev
Lub npe tshuaj ntawm daim txhuam cev yog polyurethane ua npuas ncauj, thiab peb cov sponges feem ntau yog ua los ntawm cov ntoo cellulose fibers los yog foamed yas polymers. Cov ntaub ntawv tseem ceeb rau kev ua cov txaj txaj yog polyether thiab TDI / MDI (25 feem pua -35 feem pua), ntxiv rau qee cov tshuaj foaming thiab catalysts.
2. Foaming txoj cai ntawm daim txhuam cev
Daim txhuam cev muaj qhov ntxeem tau ntawm honeycomb qauv, thiab muaj qhov muag muag zoo thiab nqus dej, thiab siv dav hauv cov rooj zaum, txaj, khaub ncaws, ntim khoom thiab lwm yam lag luam. Txhawm rau txhawm rau txhim kho qhov yooj yim thiab elasticity ntawm daim txhuam cev, nws feem ntau foamed. Muaj plaub txheej txheem tseem ceeb rau foaming:
ib. Prepolymer foaming txoj kev
Polyether polyol thiab diisocyanate yog thawj zaug ua rau hauv prepolymer, thiab tom qab ntawd dej, catalyst, surfactant, thiab lwm yam additives ntxiv rau prepolymer, tov nyob rau hauv high-speed stirring rau foaming, thiab ces kho ntawm ib tug tej yam kub tom qab kho. .
b. Semi-prepolymer foaming txoj kev
Ib feem ntawm cov khoom siv polyether polyol (cov khoom siv dawb) thiab diisocyanate (cov khoom siv dub) yog ua rau hauv prepolymer ua ntej, thiab tom qab ntawd lwm qhov ntawm cov khoom siv dawb thiab cov khoom siv dub, catalyst, dej, surfactant thiab lwm yam additives yog ntxiv ntawm kev kub ceev. Sib tov nrog stirring rau foaming. Txoj kev foaming no muaj qee yam zoo sib xws nrog cov txheej txheem prepolymer foaming.
c. Ib-kauj ruam foaming method
Cov ntaub ntawv nyoos xws li polyether lossis polyester polyol thiab polyisocyanate, dej, catalyst, surfactant, foaming agent, thiab lwm yam additives yog ntxiv rau hauv ib kauj ruam, thiab foaming yog nqa tawm tom qab sib tov nyob rau hauv high-speed stirring. Cov txheej txheem ib-kauj ruam foaming tam sim no yog ib txoj kev siv ntau.
d. Phau ntawv foaming txoj kev
Qhov no yog ib txoj hauv kev yooj yim kom hnyav tag nrho cov khoom xyaw, muab tso rau hauv ib lub thawv, thiab tam sim ntawd sib tov zoo thiab txhaj rau hauv pwm los yog qhov chaw uas yuav tsum tau ua npuas ncauj. Lub polyisocyanate yog hnyav nyob rau hauv kawg.
Cov saum toj no yog plaub txoj kev siv foaming. Tom qab foaming kev kho mob, daim txhuam cev tuaj yeem tau zoo dua elasticity thiab nqus dej, uas tuaj yeem ua tau raws li qhov xav tau ntawm ntau qhov kev lag luam rau daim txhuam cev.
3. Kev faib cov sponges
ib. Kev faib tshuaj
Los ntawm cov ntsiab lus ntawm cov tshuaj lom neeg, cov sponges tuaj yeem muab faib ua: cov sponges zoo tib yam, qeeb-rebound sponges, thiab siab-resilience sponges.
b. Txheej txheem kev faib tawm
Raws li cov txheej txheem ntau lawm ntawm daim txhuam cev, daim txhuam cev tuaj yeem muab faib ua: hom txiav thiab molding hom.
Cov pawg txiav tau muab faib ntxiv rau hauv daim txhuam cev zoo tib yam, qeeb rov qab daim txhuam cev (nco ua npuas ncauj: sov / tsis sov), siab rebound sponge, thiab imitation latex daim txhuam cev.
Lub molding qeb yog muab faib ua cov pa-sensing daim txhuam cev, sov-sensing daim txhuam cev, zoo tib yam qeeb rebound, zoo tib yam siab rebound, thiab imitation latex daim txhuam cev. Cov pa hauv ncoo thiab txaj txaj feem ntau siv peb hom sponges: [cua, qhov kub thiab txias, thiab zoo tib yam rov qab qeeb]. Cov cushions dav siv cov ntaub nplaum zoo tib yam li cov ntaub ntawv raw, xws li lavender thiab txiv maj phaub. Kuv cov hauv ncoo feem ntau siv cov latex sponges imitation. ua.
Qhov sib txawv ntawm kev txiav thiab molding: Muaj qhov sib txawv ntawm cov txheej txheem thiab cov khoom siv raw. Cov daim txhuam cev yog ib daim txhuam cev foamed los ntawm ib txoj kab sib dhos, thiab daim txhuam cev molding yog cov khoom molded los ntawm pwm. Cov txheej txheem molding ntawm qee cov khoom tshwj xeeb zoo li yuav yooj yim dua, thiab nws yuav txo qis cov khoom siv raw. .
Piv txwv li, los ntawm kev faib cov ntsiab lus ntawm qhov kev pom, nws tuaj yeem xaus lus tias: daim txhuam cev > nco ua npuas ncauj > tsis nco nco ua npuas ncauj, uas yog hais tias, tsis nco nco ua npuas ncauj belongs rau nco ua npuas ncauj, thiab nco ua npuas ncauj belongs rau daim txhuam cev. Nyob rau hauv kev ua lag luam, zoo tib yam ua npuas ncauj thiab nco ua npuas ncauj feem ntau yog siv los ua lub filling txheej ntawm lub txaj.
4, daim txhuam cev ceev thiab hardness
ib. Qhov ntom ntawm daim txhuam cev feem ntau yog sawv cev los ntawm D
D=kg/m³. Siv lub txiv ntseej: 25D txhais tau hais tias txhua qhov cubic daim txhuam cev hnyav 25kg.
Ordinary daim txhuam cev: 18D-40D
Cua sponge: 28D-55D
Daim txhuam cev latex: 50D-55D
Slow rebound daim txhuam cev: 33D-80D
Qhov siab dua qhov ntom, qhov nyuaj ntawm daim txhuam cev: feem ntau, qhov tawv thiab softness ntawm daim txhuam cev tsis muaj kev sib raug zoo nrog qhov ntom. Lub softness thiab hardness yog tsuas yog hloov los ntawm kev kho cov mis. Tib qhov ntom ntom ntawm daim txhuam cev tuaj yeem ua nrog sib txawv hardness.
b. Lub hardness ntawm daim txhuam cev yog qhia los ntawm ILD
Qhov siab dua ILD, qhov nyuaj ntawm daim txhuam cev. Siv lub txiv ntseej: 20 phaus ntawm ILD daim txhuam cev txhais tau hais tias cov khoom siv yuav tsum tau 20 phaus ntawm lub siab los txhawm rau txhawm rau 25 feem pua.
Daim txhuam cev mos: 20-35ILD
Daim txhuam cev nruab nrab: 36-40ILD
Daim txhuam cev tawv: 41-45ILD
Daim txhuam cev tawv (ntau hom kev tawm tsam): 46-55ILD
Super tawv hom ≈ 56ILD
Qhov ib txwm muaj ntawm qeeb rov qab ILD yog 9-15, thiab qhov ntau ntawm cov paj rwb zoo tib yam ILD yog 32-45.
Thaum siv daim txhuam cev hauv lub txaj, nws qhov softness thiab hardness tuaj yeem hloov kho los ntawm qhov sib txawv, thiab cov ntaub so ntswg uas tsim nyog thiab softness tuaj yeem ua rau ntau pawg neeg.
