FI58275C - Foerfarande foer framstaellning av svetsade foeremaol av tvaerbindbart plastmaterial - Google Patents

Foerfarande foer framstaellning av svetsade foeremaol av tvaerbindbart plastmaterial Download PDF

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Publication number
FI58275C
FI58275C FI2631/73A FI263173A FI58275C FI 58275 C FI58275 C FI 58275C FI 2631/73 A FI2631/73 A FI 2631/73A FI 263173 A FI263173 A FI 263173A FI 58275 C FI58275 C FI 58275C
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Finland
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temperature
crosslinking
zones
polyolefin
tvaerbindbart
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FI2631/73A
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English (en)
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FI58275B (fi
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Andre Henri Jean Ansart
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Pont A Mousson
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
    • B29C65/5057—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like positioned between the surfaces to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/131—Single flanged joints, i.e. one of the parts to be joined being rigid and flanged in the joint area
    • B29C66/1312—Single flange to flange joints, the parts to be joined being rigid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/737—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined
    • B29C66/7375—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined uncured, partially cured or fully cured
    • B29C66/73751—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined uncured, partially cured or fully cured the to-be-joined area of at least one of the parts to be joined being uncured, i.e. non cross-linked, non vulcanized
    • B29C66/73752—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined uncured, partially cured or fully cured the to-be-joined area of at least one of the parts to be joined being uncured, i.e. non cross-linked, non vulcanized the to-be-joined areas of both parts to be joined being uncured
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C71/00—After-treatment of articles without altering their shape; Apparatus therefor
    • B29C71/04—After-treatment of articles without altering their shape; Apparatus therefor by wave energy or particle radiation, e.g. for curing or vulcanising preformed articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/4805—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the type of adhesives
    • B29C65/483—Reactive adhesives, e.g. chemically curing adhesives
    • B29C65/4835—Heat curing adhesives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/04—Polymers of ethylene
    • B29K2023/06—PE, i.e. polyethylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/04—Polymers of ethylene
    • B29K2023/06—PE, i.e. polyethylene
    • B29K2023/0608—PE, i.e. polyethylene characterised by its density
    • B29K2023/065—HDPE, i.e. high density polyethylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
    • B29K2105/16—Fillers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/24—Condition, form or state of moulded material or of the material to be shaped crosslinked or vulcanised
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0037—Other properties
    • B29K2995/0063—Density

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)

Description

L· .««—L'-M r_, KUULUTUSJULKAISU r Ο Ο Π C
j^STgi 8 *11) utlAggninqsskrift ^ 8 2 7 5 C (45) F*π1ΐ I tnyJni*- - ty 01 lv31 Patent decide la t (51) KY.ik?/fi*t.a.3 B 29 c 27/02 SUOMI —FINLAND (21) P»t*«mih«k«mu* —P*t*nt»n»ökt*lng 2631/73 (22) H«k*ml*p*lvi — Aiweknlngadag 23 · 08.73 (23) Alkuptlvl—GlMghutsdag 23.08.73 (41) Tullut julklMlul — Bltvit offuntllg 26.02.7^
Patentti- ja rekisterihallitut NihttvSJuip^ j. kuuLiuitaiem pvm. -
Patent· och registerstyrelaan ' Anseksn uticgd och utUkrffean publican* 30.09.80 ~ (32)(33)(31) PyyJ*«r atuoikaui—Begird priorttat 25.08.72
Ranska-Frankrike(FR) 72303^1 Toteennäytetty-Styrkt (71) Pont-A-Mousson S.A., Avenue Camille Cavallier, 5^ Pont-A-Mousson, Ranska-Frankrike(FR) (72) Andr6 Henri Jean Ansart, Toul, Ranska-Frankrike(FR) (7C) Oy Kolster Ab (5C) Menetelmä hitsattujen esineiden valmistamiseksi ristiliitettEvästä muovimateriaalista - Förfarande för framställning av svetsade före-mäl av tvärbindbart plastmaterial Tässä puheena oleva keksintö käsittelee menetelmää ristilii-tettävää polyolefiiniä olevien kappaleiden hitsaamalla tapahtuvak-^ si yhdistämiseksi ristiliitettyä polyolefiiniä olevien yhdistetty jen esineiden aikaansaamiseksi.
Ristiliitetystä muovista valmistetut esineet ovat jo kauan olleet tunnettuja hyvien ominaisuuksiensa vuoksi nimenomaan koska niiden virumiskestävyys korkeissakin lämpötiloissa on hyvä.
Niiden edelleen kehittämistä haittaa kuitenkin yksi vaikeus ja se on ristiliitettyjen kappaleiden kokoaminen hitsaamalla, joka tähän saakka on ollut suhteellisen hankalaa.
Jotta tähän pystyttäisiin, on esitetty, että hitsattavien jo ristiliitettyjen kappaleiden väliin sijoitettaisiin kalvo, joka on samaa perusmuovimateriaalia, ja johon on ruiskuvalettu sopivia lisäaineita niin että se voidaan ristiliittää, mutta jota ei hitsa- 2 58275 ushetkellä kuitenkaan vielä ole ristiliitetty. Tällainen tekninen menetelmä on mainittu mm. ranskalaisissa patenteissa n:o 1 153 915, 1 365 656 ja 2 050 003. Tämän menetelmän kiinnostavuutta ei ole syytä kieltää, mutta vaikka näiden liitosten leikkauslujuus monissa tapauksissa on riittävä, niiden huono lujuus vääntöä tai repeämistä vastaan tekee ne sopimattomiksi tiettyihin sovellutuksiin.
Siksi tässä puheena olevan keksinnön tarkoituksena on esittää käytännön menetelmä, jonka avulla voidaan saada aikaan risti-liitettävästä muovimateriaalista hitsattuja esineitä, joiden kestävyys sekä leikkaamista että repeytymistä vastaan on yhtä hyvä.
Tässä mielessä tarkoituksena on luoda menetelmä, tunnettu siitä, että mainittuun polyolefiiniin lisätään ristiliitosaineita, mainitut kappaleet valmistetaan lämpötilassa, joka on ristiliitok-sen vaatimaa lämpötilaa alhaisempi, näiden kappaleiden tietyt vyöhykkeet saatetaan kosketukseen keskenään, minkä jälkeen, pitäen yhdistelmää edelleen ristiliitoksen vaatimaa lämpötilaa alhaisemmassa lämpötilassa, mainitut keskenään kosketuksessa olevat vyöhykkeet hitsataan yhteen kuumentamalla näitä ja vain näitä vyöhykkeitä ristiliitoksen vaatimaa lämpötilaa lähellä olevaan lämpötilaan, samalla aiheuttaen niihin puristusta, ja lopuksi yhdistelmä saatetaan täydellisen ristiliitoksen edellyttämään lämpötilaan.
Muut keksintöön liittyvät ominaispiirteet ja edut selviävät selostuksesta, joka liittyy oheiseen piirustukseen, jossa: kuvio 1 on leikkauskuva ristiliitetystä muovista valmistetusta hitsauskokonaisuudesta, joka on keksinnön mukaan valmistettu leikkauskoetta varten; kuvio 2 on leikkauskuva ristiliitetyistä muovikappaleista valmistetusta hitsauskokonaisuudesta, joka on keksinnön mukaan valmistettu repäisykoetta varten; _ kuvio 3 on kuvion 1 mukainen kuvio, jossa kokoaminen on tapahtunut jo tunnetun tekniikan avulla; kuvio 4 esittää myös kuvion 2 mukaista liitosta, jossa kokoaminen on tapahtunut tunnetun tekniikan avulla.
Kuvattujen esimerkkien yksinomaisena tarkoituksena on saada lukija käsittämään, miten keksintöä sovelletaan ja samalla ne kuvaavat kokeita, joiden avulla voidaan arvioida parannuksia, jotka keksintö tuo tullessaan.
58275 Tässä yhteydessä käytetään densiteetiltään korkeaa polyety-leeniä, esimerkiksi niitä jotka tunnetaan tavaramerkillä "Lupelene 5261Z" tai "Lupelene 4261A", joita valmistaa Badische Anilin- und Sodafabrik ja "Manelene EF 2120" tai "Manelene EF 2121" tai "Mane-lene 56020", joita valmistaa Sodefine-niminen yhtiö, ja joihin on lisätty suhteessa 1-5 % orgaanisia peroksideja, kuten ditert-butyy- li-peroksidia, dikumyyliperoksidia ja diperoksidi 1,3-ditertbutyy-li peroksidi-isopropyylibentseeniä.
Käytetty aine voi yhtä hyvin olla densiteetiltään alhaista polyetyleeniä tai polypropyleeniä, joihin on lisätty ristiliitok-seen tarvittavat lisäaineet. Aineena voidaan yleisesti ottaen käyttää mitä tahansa ristiliitokseen soveltuvaa muovimateriaalia, johon on lisätty ristiliitokseen tarvittavat lisäaineet ja jossa on li-^ säksi lasikuitua tai muita vahvisteaineita, jotka nekään eivät ole välttämättömiä.
Tämä sekoitus pursotetaan tarvittavassa 1U0-180°C välillä olevassa lämpötilassa niiksi osiksi, jotka muodostavat puolivalmisteet tuotannossa.
Näissä osissa on kokoamisalueella joko tason reuna-alue, kuten osien 1 ja 2 suhteen on kuviossa 1, tai tasojen taivutetut reunat 3, kuten on asianlaita osien la ja 2a suhteen kuviossa 2.
Tämän jälkeen kappaleet hitsataan yhteen niin, että ensimmäisessä tapauksessa tasojen reuna-alueet ovat toistensa päällä, tai taivutetut reunat ovat vastakkain, kuten toisessa tapauksessa ja hitsaus tapahtuu tunnetun menetelmän mukaan esimerkiksi siten, että - kappaleet kulkevat kuumailmavirran kautta ja puristetaan sen jälkeen terästelojen välissä; - kappaleet kulkevat lämmitysluistien välistä (joiden hanka-uskoeffisientti on heikko, mikäli kysymys on jatkuvasta hitsauksesta) ja puristetaan tämän jälkeen terästelojen välissä; - samanaikainen lämmitys ja puristus lämpöpuristimen avulla; - kappaleet kulkevat ultraäänilähteen kautta ja puristetaan sitten terästelojen välissä, jolloin voidaan välttää kaikki katkot hitsauksessa.
Nämä hitsausmenetelmät aiheuttavat yleensä sen, että aineen lämpötila kohoaa 180-200°C välille.
Näin aikaansaadut hitsauskokonaisuudet ovat nyt valmiit ris-tiliitosta varten. Tämä suoritetaan jokaiselle kootulle kappaleelle kokonaisuudessaan ja se vaatii yleensä lämpötiloja, jotka ovat “ 58275 joko 200°C tai enemmän.
On selvää että tässä mainitut lämpötilat koskevat korkeadensi-teettistä polyetyleeniä ja olisivat erilaiset, mikäli käytettäisiin toisia materiaaleja.
Kuviot 3 ja 4 esittävät samanlaisia kokoamistuloksia, mutta osat 4 ja 5 (kuvio 3) jotka ovat tasojen reuna-alueita tai osat 4a ja 5a, joilla on vastakkain taivutetut reuna-alueet (kuvio 4) on liitetty tunnetulla menetelmällä käyttämällä kalvoa 6 tai 6a, joka on sijoitettu jo ristiliitettyjen kappaleiden väliin.
Keksinnön mukanaan tuomat parannukset on esitetty allaolevassa vertailevassa taulukossa josta ilmenevät liitosten 1-2 (kuvio 1) ja 4-5-6 (kuvio 3) välillä suoritetut leikkauslujuuskokeet sekä liitosten la-2a (kuvio 2) ja 4a-5a-6a (kuvio 4) välillä suoritetut re-päisylujuuskokeet.
Koe tunnettu keksinnön menetelmä mukaan 2
Leikkauslujuus daN/cm hitsatulla pinnalla kuviot 1 ja 3 10-50 yli 100
Repäisylujuus daN/cm hitsaussau-massa kohtisuoraan leikkausta vasten (kuviot 2 ja 4) 3,5 13

Claims (3)

5 58275
1. Menetelmä ristiliitettävää polyolefiiniä olevien kappaleiden hitsaamalla tapahtuvaksi yhdistämiseksi ristiliitettyä polyolefiiniä olevien yhdistettyjen esineiden aikaansaamiseksi, tunnettu siitä, että mainittuun polyolefiiniin lisätään ristiliitosaineita, mainitut kappaleet valmistetaan lämpötilassa, joka on ristiliitoksen vaatimaa lämpötilaa alhaisempi, näiden kappaleiden tietyt vyöhykkeet saatetaan kosketukseen keskenään, minkä jälkeen, pitäen yhdistelmää edelleen ristiliitoksen vaatimaa lämpötilaa alhaisemmassa lämpötilassa, mainitut keskenään kosketuksessa olevat vyöhykkeet hitsataan yhteen kuumentamalla näitä ja vain näitä vyöhykkeitä ristiliitoksen vaatimaa lämpötilaa lähellä olevaan lämpötilaan, samalla aiheuttaen niihin puristusta, ja lopuksi yhdistelmä saatetaan täydellisen risti-liitoksen edellyttämään lämpötilaan.
2. Patenttivaatimuksen 1 mukainen menetelmä, tunnettu siitä, että ristiliitettävä, käytettävä polyolefiini on korkeadensi-teettistä polyetyleeniä.
3. Patenttivaatimuksen 2 mukainen menetelmä, tunnettu siitä, että korkeadensiteettiseen polyetyleeniin lisätään 1...5 % orgaanisia peroksideja ja että ne lämpötilat, joissa kappaleet valmistetaan ja hitsataan yhteen ja yhdistelmä täydellisesti ristiliite-tään, ovat 140...180°C, 180...200°C ja vastaavasti yli 200°C.
FI2631/73A 1972-08-25 1973-08-23 Foerfarande foer framstaellning av svetsade foeremaol av tvaerbindbart plastmaterial FI58275C (fi)

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FR7230341A FR2196888B1 (fi) 1972-08-25 1972-08-25
FR7230341 1972-08-25

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FI58275C true FI58275C (fi) 1981-01-12

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AT (1) AT337445B (fi)
BE (1) BE801811A (fi)
CH (1) CH576325A5 (fi)
DE (1) DE2340920A1 (fi)
ES (1) ES417251A1 (fi)
FI (1) FI58275C (fi)
FR (1) FR2196888B1 (fi)
GB (1) GB1376430A (fi)
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US4287011A (en) * 1979-05-11 1981-09-01 Radiation Dynamics, Inc. Closure method
US4382513A (en) * 1981-02-06 1983-05-10 W. R. Grace & Co., Cryovac Div. Packages having readily peelable seals
CA1194773A (en) * 1982-03-12 1985-10-08 John R. Dunn Bonding elastomers
GB8620071D0 (en) * 1986-08-18 1986-10-01 British Gas Corp Structures of polymeric plastics material
GB2214863B (en) * 1988-02-19 1991-09-04 British Gas Plc Joining polyolefinic members by fusion
US5173142A (en) * 1991-07-19 1992-12-22 Wellman Machinery Of Michigan, Inc. Method of making reinforced structural composite assemblies

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FR1527798A (fr) * 1966-02-04 1968-06-07 Semperit Ag Procédé en vue d'obtenir une liaison ferme entre deux ou plusieurs couches de mélanges de différentes compositions de polymères de caoutchouc naturel ou synthétique
NL6809254A (fi) * 1968-06-29 1969-12-31

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DE2340920A1 (de) 1974-03-14
NL7310403A (fi) 1974-02-27
ES417251A1 (es) 1976-02-16
AT337445B (de) 1977-06-27
IT991924B (it) 1975-08-30
BE801811A (fr) 1974-01-02
GB1376430A (en) 1974-12-04
FI58275B (fi) 1980-09-30
JPS4993482A (fi) 1974-09-05
CH576325A5 (fi) 1976-06-15
FR2196888A1 (fi) 1974-03-22
ATA731173A (de) 1976-10-15
FR2196888B1 (fi) 1975-01-03

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