TW474865B - Apparatus and method for making barrier coated polyester - Google Patents
Apparatus and method for making barrier coated polyester Download PDFInfo
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- TW474865B TW474865B TW89107444A TW89107444A TW474865B TW 474865 B TW474865 B TW 474865B TW 89107444 A TW89107444 A TW 89107444A TW 89107444 A TW89107444 A TW 89107444A TW 474865 B TW474865 B TW 474865B
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- 238000000034 method Methods 0.000 title claims abstract description 92
- 229920000728 polyester Polymers 0.000 title claims abstract description 25
- 230000004888 barrier function Effects 0.000 title abstract description 20
- 239000000463 material Substances 0.000 claims abstract description 212
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- 239000005020 polyethylene terephthalate Substances 0.000 claims abstract description 164
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- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 claims description 14
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- GTZCVFVGUGFEME-UHFFFAOYSA-N trans-aconitic acid Natural products OC(=O)CC(C(O)=O)=CC(O)=O GTZCVFVGUGFEME-UHFFFAOYSA-N 0.000 description 1
Classifications
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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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/16—Making multilayered or multicoloured articles
- B29C45/1615—The materials being injected at different moulding stations
- B29C45/1625—Injecting parison-like articles
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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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/03—Injection moulding apparatus
- B29C45/04—Injection moulding apparatus using movable moulds or mould halves
- B29C45/0441—Injection moulding apparatus using movable moulds or mould halves involving a rotational movement
- B29C45/045—Injection moulding apparatus using movable moulds or mould halves involving a rotational movement mounted on the circumference of a rotating support having a rotating axis perpendicular to the mould opening, closing or clamping direction
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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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/16—Making multilayered or multicoloured articles
- B29C45/1615—The materials being injected at different moulding stations
- B29C45/1628—The materials being injected at different moulding stations using a mould carrier rotatable about an axis perpendicular to the opening and closing axis of the moulding stations
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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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/16—Making multilayered or multicoloured articles
- B29C45/1684—Injecting parison-like 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/40—Removing or ejecting moulded articles
- B29C45/43—Removing or ejecting moulded articles using fluid under pressure
-
- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/72—Heating or cooling
- B29C45/73—Heating or cooling of the 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/72—Heating or cooling
- B29C45/73—Heating or cooling of the mould
- B29C45/7312—Construction of heating or cooling fluid flow channels
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/0005—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor characterised by the material
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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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/22—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor using multilayered preforms or parisons
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D1/00—Rigid or semi-rigid containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material or by deep-drawing operations performed on sheet material
- B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
- B65D1/0207—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by material, e.g. composition, physical features
- B65D1/0215—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by material, e.g. composition, physical features multilayered
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B11/00—Making preforms
- B29B11/06—Making preforms by moulding the material
- B29B11/08—Injection moulding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B11/00—Making preforms
- B29B11/14—Making preforms characterised by structure or composition
-
- 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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/52—Heating or cooling
- B29C2043/527—Heating or cooling selectively cooling, e.g. locally, on the surface of the material
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/78—Measuring, controlling or regulating
- B29C2049/7879—Stretching, e.g. stretch rod
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29C2949/00—Indexing scheme relating to blow-moulding
- B29C2949/07—Preforms or parisons characterised by their configuration
- B29C2949/0715—Preforms or parisons characterised by their configuration the preform having one end closed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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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
- B29C2949/00—Indexing scheme relating to blow-moulding
- B29C2949/07—Preforms or parisons characterised by their configuration
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29C2949/00—Indexing scheme relating to blow-moulding
- B29C2949/07—Preforms or parisons characterised by their configuration
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29C2949/00—Indexing scheme relating to blow-moulding
- B29C2949/07—Preforms or parisons characterised by their configuration
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B29C2949/00—Indexing scheme relating to blow-moulding
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- B29C2949/0772—Closure retaining means
- B29C2949/0773—Threads
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- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29C2949/0777—Tamper-evident band retaining ring
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- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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474865 6073pif.doc/008 A7 B7 經濟部智慧財產局員工消費合作社印製 五、發明說明(() 本發明是有關於一種製造具有隔離膜之聚酷(pE) g勺製 造裝置與製造方法,且特別是有關於製造具有隔離膜之聚 對苯二甲酸乙酯(PET)及此類物件的製造方法與製造裝 置。該具有隔離膜之聚對苯二甲酸乙酯可爲製作材料,其 噴塑成形(blow-molding)之瓶子’至少具有一層隔離膜。 在飮料包裝上,以塑膠瓶取代玻璃瓶已成趨勢。與玻 璃瓶:比較起來,塑膠瓶之優點包括輕巧,不易碎及價廉。 而最常用於飮料包裝之塑膠材料爲聚對苯二甲酸乙酯 (polyethylene terephthalate,PET),其已被美國食品及藥物 管理局認可,可用於食品包裝上。用聚對苯二甲酸乙酯製 成之容器,透明,輕巧壁薄且不會因內含增壓物(如碳酸 飮料)而變形。此外,聚對苯二甲酸乙酯價格不高且易於 加工。 但是除了上述之優點極其廣泛之應用之外,聚對苯二 甲酸乙酯在用作爲薄壁之飮料容器時,有一嚴重之缺點, 就是聚對苯二甲酸乙酯可·透氣體,耻逐.漸盪氣。對小瓶 裝而言,因爲其表面積與容積之比例較大,會導致氣體較 易經由瓶壁表面散逸,漏氣問題會特別明顯。也因爲聚對 ,______ ______________ * -·... 苯二甲酸乙酯之透氣性,用聚對苯二甲酸乙酯瓶盛裝之碳 酸飮料,會因二氧化碳外漏而扁平化,而且飮料也會因空 氣中之氧氣滲入,而導致風味改變。 因爲上述所提之問題,使得用聚對苯二甲酸乙酯做成 之容器^適用於許多工業用途。而對於聚對苯二甲酸乙酯 目前用於飮料包裝之儲存期限,也因其透氣性而比預期的 4 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐) (請先閱讀背面之注咅?事項再填寫本頁) 裝---- 訂---------線 6〇73pif.d〇c/〇〇8 A7 6〇73pif.d〇c/〇〇8 A7
五、發明說明(> ) 要短。 美國專利第54M106號(Slat et al.)中揭露一種噴塑成 形之瓶子’具有一層隔離膜。其中揭露所用以形成隔離膜 的材料爲聚萘酸乙酯(polyethylene naphthalate),薩蘭樹酯 (saran) ’ 烧-乙嫌醇(ethylene vinyl alcohol)共聚物,或丙燦 腈(acrylonitrile)共聚物。在此專利所揭露之技術中,用以 形成福離膜之材料與形成內壁之材料,乃同時噴出以形成 —管狀物。再視所需之情況加以切割,放入模子中,再注 入形成外壁之材料於管狀物之表面,而完成預定形成瓶子 之前型(preform)。此前型再經噴塑形成所需之瓶子。此技 術之缺點,在於形成隔離膜所需之材料與PET之附著並不 佳’而且過程.繁_瑣。 在美國專利第45788295號(Jabarin)中揭露一類可供形 成隔離膜之良好材料,包括對苯二甲酸,間苯二甲酸,乙 二醇及至少一二元醇形成之共聚物。此類材料之商業名稱 爲 B-010 (Mitsui Petrochemical Ind.,Japan)。此隔離膜材 料可與PET混溶,以做成含8〇〜9〇%PET及含10〜2〇%隔 離膜共聚物之混和材質。用該混和材料形成之容器,比― 般用PET做成之容器,對二氧化碳之阻絕要強上20〜40%。 雖然其宣稱此共聚材料可附著至PET且不分層,但是其只 有揭示以混和材質做成之前型。 另有一類材料,聚胺-聚環氧化物(P〇lyamine_ polyepoxides) ’也被提出做爲氣體隔離膜之材料。於美國 專利第5489455號(Nugent Jr. et al.)中,提及此類材料可 5 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐) ------------ --------訂--------•線 - (請先閱讀背面之注意事項再填寫本頁) 經濟部智慧財產局員工消费合作社印製 474865 6073pif.doc/008
五、發明說明(3 ) 經濟部智慧財產局員工消費合作社印製 作爲聚丙稀’或表面處理過之PET的隔離膜材料。此類材 料一般作爲溶劑或爲熱固性之水溶液,噴在容器之表^', 再加熱而形成隔離膜。熱固性(thermosetting)即表〒—日 加熱固化後’再加熱也不會再軟化,因此此類材料不能用 作噴塑之前型。反之’熱塑性(thermoplastic)材料可以用 作噴塑之前型’因爲其再加熱則會再軟化。 美國專利第5472753號(Farha),有提及使用〜聚醋共 聚物以加強PET與隔離膜材料之黏著。其提及使用兩種薄 片夾疊層(laminate),三夾層及二夾層。三夾層中,一層非 晶形熱塑性之聚酯共聚物置於一層含苯氧基型熱塑性材料 隔離膜及PET層中間’而該非定形熱塑性之聚酯共聚物層 乃是作爲加強隔離膜內層與PET外層附著之用。而二夾層 中’一含苯氧基型熱塑性材料乃先行與非晶形熱塑性之聚 酯共聚物混合’再用在PET上形成隔離膜。此夾疊層再以 噴塑成形或注入至模型中成形,每一層皆待冷卻後再形成 另一層。 國際專利申請第PCT/US95/17011號(Collette),公告 於1996年7月4日,其中揭露出一種$卻多層前型之方 法。其中’—旋轉的多面塔台,每—面均有一列軸(c〇re), 其軸乃插入於對應之模型空腔(cavity)中,不同材料融化再 一起注入模型空腔中,而於軸上形成多層之前型。移去該 列軸,旋轉多面塔台,再插入另一列軸,當冷卻時,前型 即形成於另一列軸上。但是,按照此方法形成之前型,因 同時注入材料,易造成不均勻,或層次不明。如此一來, 6 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐) -------I I E -----I--^----I--- (請先閱讀背面之注意事項再填寫本頁) _____ !. 474865 A7 B7 6073pif.d〇c/008 五、發明說明(山) 以此法製造之隔離膜易分佈不均,影響隔離膜之效果。 (請先閱讀背面之注意事項再填寫本頁) 因爲PET容器只須經一次注入即可成形,容易製造且 需時頗短,因此成本不高。即使有可在市售PET容器上形 成穩定隔離膜之材料’目前也沒有任何經濟且省時之方法 或裝置可供使用。比較短的製造時間對製造商是很重要 的’因爲製造機台的使用會更有效率,可提高產量並降低 成本。而較經濟之製造方法,才能使具隔離膜之PET容器 成爲取代單層PET容器的選擇方案。因此市場上極需求可 行之方法或裝置,能製造出好看、經濟、容易製造且具良 好隔絕性之容器。 因此本發明的主要目的就是在提供一種製造聚對苯二 甲酸乙酯物件的製造裝置與製造方法,其表面具有至少一 層或多層可隔絕氣體之熱塑性隔離膜,該物件可爲前型或 容器。 本發明的另一目的是在提供一覆膜之前型,其包括一 PE層及一隔離膜,在底端之PE層比在瓶壁部PE層厚度 較薄。而在瓶壁部隔離膜比在底端之隔離膜厚度較厚。 經濟部智慧財產局員工消費合作社印製 本發明的另一目的是在提供描述一覆塑法至PE物件 之方法。一 PE物件有至少一外表面及一內表面,經由一 第一閘注入融化之PE,形成於一第一空腔半型與一含軸 之半型間,利用循環之水流而冷卻而形成在含軸之半型之 上。移開第一空腔半型,再對應插入一第二空腔半型利用 循環之水流繼續冷卻。接著,進行覆膜動作,一隔離膜經 由一第二閘注入融化之隔離膜材料,形成於第二空腔半型 7 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐) 經濟部智慧財產局員工消費合作社印製 474865 6073pif.doc/008 A7 __B7 五、發明說明(β ) 與PE層外表面間,而完成覆隔離膜之PE物件。再移開第 二空腔半型,並把該物件由含軸之半型上移下。此法中所 用之隔離膜材料可爲聚酯共聚物,含苯氧基型熱塑性材 料,聚酿胺,聚萘酸乙酯,聚萘酸乙酯共聚物,聚萘酸乙 酯/PET混和物,及前述之任意組和。 本發明的又一目的是在提供描述一零造摩覆膜至前型 之方法。一封閉之模型包括一靜止半形及一可動半形,其 中的靜止半型包括至少一模型空腔及一覆膜空腔,而可動 半型包括一轉盤附有對應於該些空腔數目相等之軸。接下 之步驟包括:注入融化之第一材料於一模型空腔與一軸之 間,形成一前型,轉動轉盤’對合模型,注入融化之第二 材料於一覆膜空腔與該前型外表面之間,以形成覆膜之前 型,打開模型,及移出已覆膜之前型。 根據本發明之上述目的,依照本發明一較佳寰施例提 出一種以噴塑形成多層前型之裝置,至少包括一第一及第 二模型空腔分與一第一及第二融化材料源相通。以及一分 爲複數個小室之轉盤,其中每個小室至少置有一個模型 軸,其中該轉盤可把每個小室從一第一位置轉至一第二位 置再至少至一冷卻位置,在該第一位置上每小室中之模型 軸與模型空腔配合產生一第一前型層,在該第二位置上每 小室中之模型軸與模型空腔配合產生一第二前型層,在該 冷卻位置上該前型冷卻於軸上。 根據本發明之上述目的’依照本發明另一較佳實施例 提出一種以噴塑形成多層前型之模型裝置,至少包括:一 8 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐) ------------广'裂--------訂---------線 . (請先閱讀背面之注意事項再填寫本頁) 474865 6073pif.doc/008 A7 經濟部智慧財產局員工消費合作社印製 五、發明說明(6 ) 第一模型主體用於對合一模型軸以形成一第一層空腔於其 間,該第一模型主體與一第一融熔材料源相連並有一第一 閛區,以及一第二模型主體用於對合模型軸上之一第一前 型層以形成一第二層空腔於其間’該第二模型主體與一第 二融熔材料源相連並有一第二閘區;其中至少有一閘區置 有安普考鋁鐵青銅合金(ampcoloy)金屬插入物。 依照本發明另一較佳實施例,提出一種以噴塑形成多 層前型之模型裝置,至少包括一第一模型主體用於對合一 模型軸以形成一第一層空腔於其間,該第一層空腔有一底 端及一主體,該第一模型主體與一第一融熔材料源相連並 有一第一閘區,該閘區鄰近該第一層空腔之底端,而且該 空腔底端厚度比該空腔主體厚度要薄;以及一第二模型主 體用於對合模型軸上之一第一前型層以形成一第二層空腔 於其間,該第二模型主體與一第二融熔材料源相連並有一 第二閘區。 依照本發明另一較佳實施例,提出一種以噴塑形成多 層前型之模型,至少包括一軸及第一、第二空腔,該軸爲 中空而有均勻薄壁,以及一冷卻管置於軸中,傳導冷卻劑 至軸之底部,第一空腔有一閘以注入融化之塑膠,而閘旁 空腔之一近閘區有一插入物,其導熱力較大部分空腔高。 依照本發明又一較佳實施例,提出一種加強噴塑之方 法,該方法包括形成一開口於一模型空腔之壁上,調整該 開口之大小使融化塑膠不易進入該開口,形成一通路連結 該開口及一氣壓源,以及提供一閥門位於該開口及該氣壓 9 本紙張尺度適用中國國家標準(CNS)A4規格(2〗G X 297公楚) ---- (請先閱讀背面之注意事項再填寫本頁) 裝— 訂---------線 474865 A7 B7 6073pif.doc/008 五、發明說明(,) 源間。 依照本發明一較佳實施例,提出一種噴塑冷卻形成多 層前型之方法’該方法至少包括步驟:提供一模型軸置於 一轉盤,該模型軸並有一內部冷卻系統;轉動該轉盤使該 模型軸與一第一模型空腔對齊;對合該模型軸與該第一模 型空腔,並注入一融化之材料以形成一第一前型層;在該 第一模型空腔中冷卻該第〜前型層,使其有堅韌之表面但 內面仍爲融態;從該第一模型空腔中移出該模型軸而該前 型層仍留在該模型軸上;轉動該轉盤使該軸對齊一第二模 型空腔;對合該模型軸與該第二模型空腔,並注入一融化 之材料以在該第一前型層上形成一第二前型層;從該第二 模型空腔中移出該模型軸而該前型層仍留在該模型軸上; 轉動該轉盤使該軸與該前型對齊—冷卻位置使該前型冷卻 於該模型軸上;以及從該模型軸上移開 依照本翻—較錢_,_-種ί疊層,包含至 少-層聚對苯f甲酸乙酯直接黏著於至少一層隔離膜材 料,而聚對苯二甲酸乙酯中間苯二甲酸之含量至少爲2% 重量比,關離膜材料乃由下列材料中任意選擇其—,包 括聚酯共雜,含轉麵__料,麵胺,聚萘酸 乙酯,聚萘酸乙酯共聚物,聚萃 ^衆酸乙酯/聚對苯二甲酸乙 酯混和物,及前述之任意組和。其所述之夾疊層,可以— 前型之形式呈現’或以一容器之形式呈現。 根據本發明之上述目的,依_ +_ …、本發明一較佳實施例提 出一種前型至少包括兩層,其中I〜 _ — 、十其中一第一層在底端比在 10 (請先閱讀背面之注意事項再填寫本頁) --I-----訂---— III — — 經濟部智慧財產局員工消费合作社印製 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公复---- 經濟部智慧財產局員工消費合作社印製 474865 6073pif.doc/008 A7 ------- B7 五、發明說明(卷) 壁處較薄’而一第二層在底端比在壁處較厚。該第一層包 括間苯二酸之含量至少在2%重量比以上之聚對苯二甲酸 乙酯’而該第二層包含一隔離膜材料,其中該隔離膜材料 乃由下列材料中任意選擇其一,包括聚酯共聚物,含苯氧 基型熱塑性材料,聚醯胺,聚萘酸乙酯,聚萘酸乙酯共聚 物’聚蔡酸乙酯/聚對苯二甲酸乙酯混和物,及前述之任 意組和。 本發明之目的及優點前已述及,而本發明之實施例僅 爲示範’並非用以限制,熟知此技藝者亦知本發明可根據 實施例就本發明之目的及優點修正或強化。 爲讓本發明之上述和其他目的、特徵、和優點能更明 顯易懂,下文特舉一較佳實施例,並配合所附圖式,作詳 細說明如下: 圖式之簡單說明: 第1圖描述一未覆膜之前型30。 第2圖描述一未覆膜之前型30之剖面圖。 第3圖描述一覆膜之前型50之剖面圖。 第4圖描述一覆膜之前型60之剖面圖。 第4A圖描述一以LIM覆塑方式形成之前型之壁剖面 圖。 第5圖描述一覆膜之前型76之剖面圖。 第6圖描述一覆膜之前型50置於一含對應空洞之模 型80 ’加熱再吹氣於該前型50之中使其膨脹以塡滿該空 洞而做出一覆膜容器82。 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐) ------------4^4--------訂---------* (請先閱讀背面之注意事項再填寫本頁) 474865 經濟部智慧財產局員工消費合作社印製 6073pif.doc/008 … _B7__ 五、發明說明) 第7圖描述一已覆膜之容器82。 第8圖描述該覆膜之容器82之剖面圖。 第9圖描述一覆塑法之模型。 第10, 11圖描述第9圖裝置所運用之方法及裝置之 示意圖。 第12, 13圖描述本發明中應用之48/48型裝置相對 的兩半部。 第14圖描述一覆塑法之模型的透視圖。 第15圖描述一覆塑法之模型的透視圖。 第16圖描述一含三層之前型132。 第17、18圖描述一覆塑法之裝置150的示意圖。 第19圖描述每一循環中每室對應之位置。 第20、21圖描述一覆塑法之裝置170的示意圖。 第22、23圖描述一以覆塑法形成多層前型之裝置250 的示意圖。 第24圖描述每一循環中每室對應之位置 第25圖描述一製造融化材料之裝置。 第26圖描述一模型軸298及相對之空腔300。 第27、28圖描述一送氣系統340。 圖式之標記說明: 30, 50, 60, 76, 132 :前型 32 :頸部 34 :主體 38 :護環 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐) (請先閱讀背面之注意事項再填寫本頁) 裝--------訂---------線 474865 經濟部智慧財產局員工消費合作社印製 6073pif.doc/008 _B7_五、發明說明) 40 :環紋 44,56, 58, 62,68 :厚度 52, 84, 134, 136 :覆膜 66 :瓶壁部 72 :內壁 74 :外壁 B0 :模型 82 :覆膜容器 92 :含空洞之半型 94 :含軸之半型 96 :壁架 98, 298 :軸 100, 300 :空腔 102, 308 :閘門 104, 106 :隧溝 110 :凸拴 112 :凹座 1 14, 156, 256 :模型空腔 120, 158, 258 :覆膜空腔 130, 160, 260 :轉盤 142, 182 :可轉動的半部 144, 180 :靜止的半部 146, 148, 184, 186 :模型半部 150, 170, 250 :裝置 ------------ 裝--------訂--------線 - (請先閱讀背面之注意事項再填寫本頁) 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐) 474865 A7 B7 6073pif.doc/008 五、發明說明(π ) 152, 154, 252, 254 :噴出器 162, 172, 268 :促動器 264 :水平移動機台 266 :機板 302 :冷卻管 306 :近閘區 -310 :插入物 330 :冒泡冷卻器 332 :軸管 336 :橫條 340 :送氣系統 3 4 2 .接合處 344 :溝槽 350 :送氣管 實施例 A.本發明之槪述 本發明關於製造具膜塑物件之方法及裝置’其膜爲一 或多層具良好隔氣能力之熱塑性材料。本文所示一實施例 中,該覆隔離膜件爲飮料瓶,但也可爲罐、管、盤或瓶狀 以裝液體’只是爲了簡化’僅舉奠料瓶及其由噴塑法形成 之前形爲例。此外’文中特提及PET但可引用其它聚酯熱 塑塑膠,例如:2.6及I.5聚萘酸乙酯(PEN),PETG ’聚四 亞甲基雙羥基苯甲酸酯及聚對苯二甲酸乙酯/間苯二甲酸 乙酯共聚物。 14 ΐ紙張尺度適用中國國冢標準(CNS)A4規格(210 X 297公釐) -----------«.----1 — —訂---------、 (請先閱讀背面之注意事項再填寫本頁) 經濟部智慧財產局員工消費合作社印製 474865 A7 B7 6073pif-doc/008 五、發明說明(r>) 在一實施例中,隔離膜所附之PET乃爲「高IPA含 量之PET」。「高IPA含量PET」指形成共聚時加入IPA, 含量至少2%,在2〜10%間’可爲3〜8%,最適乃4~5°/。。 因目前食品衛生管理規定,食品飮料容易IPA含量不可超 過5%,但若無此規定,則可爲5〜10%。 高IPA含量PET(即IPA多於2%含量),可提供良好 層間钓黏著,且此黏著力隨IPA含量升高而加強。PET中 含IPA之量愈高,其結晶力隨之降低,而致使PET之表 面,即隔離膜附著之表面,較無結晶而提高層間之黏著。 此外,也可在噴塑時形成較透明之容器。 隔離膜可覆在容器之外表面或存在於瓶壁中,與Slat 之技衝不同虜,本發明中熱塑性隔離膜直接黏著於PET表 面,不易_分離,且中間並無其它黏著物質。而覆膜之前形, 使用如同未覆膜PET之製程條件,被噴塑形成強化不易碎 裂美觀,可隔離氣體之容器。 本發明使用一層或多層隔離膜,此文中所指隔離膜材 料有與PET相似物理性質,良好黏著於PET且對氧及二 氧化碳爲低通透性。 當所使用之材料選定後,即決定該使用方法及裝置。 一噴塑機台連於一模具包含軸及空腔。第一層前型經由融 熔PE注入軸與第一空腔間形成,置於軸上冷卻,軸移出 第一空腔,移動,插入第二空腔。第二層,可爲或包含之 層,噴覆於第一層上。軸再移出,而機械裝置移開前型並 冷卻之,而軸再用以形成下一前型。 15 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐) — — — III — — — — — * •丨 11 丨丨丨 1 訂---- - ---- Ϊ (請先閱讀背面之注音?事項再填寫本頁) !濟部智慧財產局員工消費合作社印製 474865 A7 B7 6073pif.doc/008 五、發明說明) 另一實施例中,覆膜前型留在軸上冷卻,而其它軸用 以形成下一前型。等到前型冷卻完全’再由機械裝置把前 型由軸上移走。 許多隔離膜材料對氧,二氧化碳有低通透性,均可依 情況、用途而用於本發明中。較適之材料可分爲二大類: 第一類爲由對苯二甲酸乙酯、間苯二甲酸與至少一二元醇 形成之共聚酯’與PET比較起來有良好氣體隔絕能力,例 如美國專利第4578295號(Jarbarin)揭示之材料,商業上可 購買之名稱爲B-010(Mitsui石化公司)。第二類爲含羥基 之聚醯氨醚,如美國專利第5089588號及第5143998號揭 示之材料;聚羥基醯氨醚,如在美國專利第5134218號所 示而製成;聚醚’如在美國專利第5115075號及第5218075 號所不而製成’ 3經基之聚醚’如在美國專利第5164472 號所币而製成’含經基之聚醚擴氨,如在美國專利第 5149768號所7K而製成,聚經基酯醚,如在美國專利第 517182〇號所示而製成;羥苯氧基醚之共聚物,如在美國 專利第5184373號所示而製成;聚羥氨基醚(pHAE),如在 美國專利第5275853號所示而製成。 第一類在本發明被引爲「聚酯隔離膜材料」,而第二 類爲引用爲「苯氧基熱塑性材料」。_聚@旨材__fda 核準。可使用於飮料食品包裝。至目前爲止,尙脏苯氧基 熱塑性材料獲核準,只能用於容器非內層之包裝。 本發明中乃形成覆膜前型或覆膜瓶子,前型至少要覆 上-層覆膜材料,其包含隔離膜材料、pET、回收ρΕτ或 本紙張尺度適用中國國家標準(CNS)A4規格(21〇 X 297公复了 (請先閱讀背面之注意事項再填寫本頁) 裝--------訂---------線 經濟部智慧財產局員工消費合作社印製 474865 A7 B7 6073pif.doc/008 五、發明說明((4) 其它熱塑材料。該覆膜層可包含單一材料,異質或同質混 合材料,多種交織材料或二種材質以上之複數薄片夾疊 層。一實施例中教示,以薄片噴塑法(Lamellar Injection Molding,LIM)即形成含多層薄層之前型。 本發明中各實施例所教示之不同層可調換次序,如: 處女PET覆一層隔離膜;處女PET輪流覆一層隔離膜及 回收PET ;或多層薄處女PET及一層隔離膜上覆一層回收 PET等。至少有一層爲隔離膜材料。 除前述提的「聚酯隔離膜材料」及「苯氧基熱塑性材 料」外,有相似性質之材料也可使用於隔離膜’例如丙烯 酸樹脂包括··聚丙烯腈,丙烯腈-苯乙烯共聚物’聚醯胺’ PEN,PEN共聚物及PET/PEN混合物。隔離膜材料之隔氣 能力要好於PET。例如:Jabarin之專利中所提及之聚酯隔 離膜材料對氧通透性約爲11 ccmil/lOOin2每日,對二氧化 碳透性約2ccmil/100in2每日。對PHAE而言,對氧、二氧 化碳通透性小至1及3.9ccmil/l〇ain2每日,反觀PET,其 對二氧化碳通透性高達12〜20ccmil/100in2每日。 本發明乃先覆膜至前型再吹塑成瓶子,因此無論後來 吹塑成的瓶子之尺寸形狀大小如何,都先製作其尺寸較小 且形狀相差不遠之前型,如此一來,方便製程設計,而且 較小尺寸之前型易於儲存以備吹塑。 但先覆膜至前型再吹塑之方法,其製程也有一定困難 度,特別在形成多層前型,例如:多層堆疊不一致,龜裂’ 覆膜厚度不均,覆膜不完全或形成孔洞。〜般而言,只要 17 -----------\ * I I I---—訂----II---線 * (請先閱讀背面之注意事項再填寫本頁) 經濟部智慧財產局員工消費合作社印製 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐) 474865 A7 B7 6073pif.doc/008 五、發明說明(A ) 選擇適當隔離膜材料,有良好黏著力,即可克服。因此, 本發明之一目的即在選擇適當隔離膜材料。 雖然本發明中,多數討論,範例,圖示僅限於雙層之 前型,但視使用情況,製造成本之各因素,得再做適度之 調整改變,製做更多層或更少層覆膜三前型。 B.本發明之圖示解說 蕭參考第1圖,描述一未覆膜之前型30,該前型可以 任何FDA核准之材料形成,例如處女PET。第1圖中所 述乃爲16盎司之碳酸飮料瓶,須具氧氣及二氧化碳之隔 絕能力,但熟知此技藝者均可理解此只爲一範例,可根據 使用之目的而在調整其形狀及特性。該前型30可採任何 已知之方法注入模型而形成。 請參考第2圖,描述一未覆膜之前型30之剖面圖。 該未覆膜之前型30有一頸部32及一主體34。該頸部32 由開口 36延伸至護環38,更包括用以繫緊瓶蓋之環紋40。 該圓柱狀主體34乃由頸部32以下延伸至底端42。該前型 之厚度44乃由前型之總長、瓶壁之厚度及形成容器之尺 寸所決定。 請參考第3圖,描述一覆膜之前型50之剖面圖。該 覆膜之前型50有一頸部32及一主體34。該覆膜52只覆 蓋在該主體34上而終止於護環38之底端,並未覆蓋於頸 部32或前型50之內表面54。該覆膜52可爲一單一材料 或包括至少兩種以上材料之多層薄膜。該前型之厚度56 乃爲原前型之厚度加上該覆膜之厚度58,與前型之總長、 18 -----------'裝·-------訂---------線- 一 (請先閱讀背面之注意事項再填寫本頁) 經濟部智慧財產局員工消費合作社印製 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐) 經濟部智慧財產局員工消費合作社印製 474865 6073pif.doc/〇〇g A7 --- B7 五、發明說明((G) 瓶壁之厚度及形成容器支尺寸相關。例如:前型主體之厚 度可爲3.2mm,其頸部之厚度約爲3mm,而覆蓋之隔離膜 厚度約爲0.3 mm。 請參考第4圖,描述一覆膜之前型60之剖面圖。該 覆膜之前型60與覆膜之前型50不同之處在於底端42處 之覆膜厚度不同,前型50之覆膜52均比其主體之厚度要 薄—而前型60之覆膜52在底端42之厚度62比在瓶壁 部66之厚度64要厚。反之,前型6〇在底端42之厚度7〇 比在瓶壁部66之厚度68要薄。此種設計在覆塑法 (Ovennolding)時特別有用,因其減少模塑時間。該覆膜52 可爲均質材料或包括多層薄膜。 請參考第4A圖,描述一以LIM覆塑方式形成之前型 之壁剖面圖。該UM覆塑方式會再加以敘述。該前型包括 內壁72與外壁74。當以LIM覆塑方式形成時,該外壁74 乃包含多層薄膜。但第4圖所示之前型並非均爲此類。 請參考第5圖,描述一覆膜之前型76之剖面圖。該 覆膜之前型76與覆膜之前型50,60不同之處’在於前型 5〇,60之覆膜52覆蓋住其主體34與其頸部32。 本發明中覆膜之前型及容器可有不同的相對厚度。該 覆膜之前型及容器於不同點之厚度可依照覆膜之過程或容 器之用途而做調整。此外,該覆膜可爲爲一單一材料或包 括至少兩種以上材料之多層薄膜。 如第3圖所示,得到一已覆膜之前型,接著’要進行 一吹塑成形之步驟。請參考第6圖,一覆膜之前型50置 19 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐) ---------- 裂--------訂·--------線 (請先閱讀背面之注咅?事項再填寫本頁) 474865 A7 B7 6073pif.doc/008 五、發明說明(0 ) 於一含對應空洞之模型80,加熱再吹氣於該前型50之中 使其膨脹以塡滿該空洞而做出一覆膜容器82。此吹塑成形 之步驟只要乃針對其主體34而其頸部32及護環,環紋仍 維持前型之形狀。 請參考第7圖,得到一如第3圖所示之已覆膜之容器 82,其經由前型50進行一吹塑成形之步驟而成。該覆膜 之容器82包括一主體34與一頸部32對應於前型50之主 體及頸部,該容器82之頸部更包括用以繫緊瓶蓋之環紋 40 ° 請參考第8圖,描述該覆膜之容器82之剖面圖。該 覆膜84之只覆蓋在該主體34上而終止於護環38之底端, 其內表面86,可以任何FDA核准之材料形成,例如PET, 並未被覆蓋而直接與飮料或食物接觸。依照本發明一實施 例,一碳酸飮料瓶,其覆膜之厚度87約爲0.02〜0.06吋, 較適範圍爲〇.〇3〜0.04吋。該PET層之厚度88約爲 0,08〜0.16吋,較適範圍爲0.10〜0.14吋。該容器82之厚 度90大部分乃爲該PET之厚度。 請參考第9圖,描述一覆塑法之模型。該模型分爲一 含空洞之半型92,用以放置未覆膜之前型,與一含軸之半 型94,其加壓於該前型之頂端。該未覆膜之前型置於含空 洞之半型92及含軸之半型94之間,而護環38卡在含空 洞之半型92的壁架96上,因此前型之頸部32乃與主體34 隔開。前型之主體34被一空腔100所包圍,然後融化的 覆塑材料經由閘門102注入空腔1〇〇而形成隔離膜,再由 20 ΙΙΙΙΙΙΙΙΙΙΙΪ. I------訂· — — — — — — I· , (請先閱讀背面之注意事項再填寫本頁) 經濟部智慧財產局員工消費合作社印製 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐) 474865 A7 B7 6073pif.doc/008 五、發明說明(6 ) 隧溝104,106中循環之水流而冷卻。隧溝104 ’ 106中循 環之水流最好是完全分開的。 請參考第10 ’ 11圖’描述本發明中所運用之方法及 裝置之示意圖,此裝置可在剛形成之未覆膜之前型上覆上 隔離膜。第1 〇,11圖’分別描述本發明中所運用之裝置 相對的兩半部。第10圖中之凸拴110乃對應插入第11圖 中的另一半部之凹座112。第11圖中的另一半部有數對空 腔(即爲第9圖中之空腔),分爲第一次注入之模型空腔1 Η 及第二次注入之覆膜空腔120,彼此數目相等且依通過凹 座112之切線呈相對排列。因此空腔114與120夾180度。 第10圖中描述的半部有數個軸98可對應插入空腔 114及120中。當兩半部合在一起時,軸98可對應插入模 型空腔114中,作爲前型內部之模型,插入覆膜空腔120 中,作爲未覆膜前型之中央支持物。該軸98固定於轉盤130 上,以180度旋轉,因此對準模型空腔114之該軸98,在 旋轉180度之後,會對準了覆膜空腔120,反之亦然。如 此之設計可使該前型在同一機台上以兩步驟之方式,先被 塑形再被覆膜。 此實施例只替一範例,並不用以限制本發明之應用, 本實施例中有3個空腔114及3個空腔120,爲3/3空腔 型,但本發明可有不同數目之空腔,例如:12/12型,24/之4 型’ 48/48型等。熟知此技藝者可做各式之安排與變化。 參考第Π,13圖,如同第1〇,11圖所示,分別描述 本發明中應用之48/48型裝置相對的兩半部。 21 本紙張尺度適財g @家標準(CNS)A4規格⑵〇 I--— — — — — III...- --- ---- (請先閱讀背面之注意事項再填寫本頁) 經濟部智慧財產局員工消費合作社印製 297公釐) 474865 A7 B7 6073pif.doc/008 五、發明說明(θ) 請參考第14圖,繪示一覆塑法之模型的透視圖。該 軸98位於空腔114與120中,圖中之箭頭代表模型中含 軸98可轉動的半部142之轉動方向。 請參考第15圖,繪示一覆塑法之模型的透視圖。該 軸98離懸於空腔114與120外,圖中之箭頭代表模型中 可轉動的半部142之轉動方向,其轉動180度帶動軸98 由一空腔轉向另一空腔。而靜止的半部144上,模型空腔 114之冷卻與覆膜空腔120之冷卻是分開的,而且也與軸 98之冷卻分開。 請參考第16圖,繪示一含三層之前型132。該前型可 視爲是第1圖中之前型30覆蓋了兩層隔離膜134及136。 請參考第17圖,繪示一覆塑法之裝置150的示意圖。 一第一噴出器152及一第二噴出器154置於該裝置150之 頂端,提供融化材料給模型空腔156,158。 請參考第18圖,繪示該裝置150之一轉盤160,該 轉盤160上以90度排列有四室A、B、C、D各含一軸98A、 98B、98C、98D。一促動器162,如水壓汽缸,可舉起該 轉盤160使軸98插入該第一模型空腔156及第二模型空 腔158。接著,該轉盤160被放下使軸98移出該空腔, 再轉90度。如此循環使不同室之軸經由一連串90度之轉 動輪流插入該第一及第二模型空腔156、158中。 請參考第19圖,繪示每一循環中每室對應之位置。 請參考第20、21圖,繪示一覆塑法之裝置170的示 意圖,該裝置170與第17、18圖所示之裝置有多處相似。 22 I--------— I. -----I I I 訂----— II--* (請先閱讀背面之注意事項再填寫本頁) 經濟部智慧財產局員工消費合作社印製 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐) 474865 A7 B7 6〇73pif,doc/008 五、發明說明() (請先閱讀背面之注意事項再填寫本頁) 該裝置170中,並非以水壓汽缸舉起該轉盤,轉盤160上 的每室均分別由一促動器172控制,而獨立移動於對應之 模型空腔間。因此該裝置170更有協調性,如第20圖所 示’當第一空腔156中的軸98已移出時,第二空腔158 中之軸仍保留,因此各模型空腔之停留時間可各自最佳 化。 請參考第22〜23圖,繪示一以覆塑法形成多層前型之 裝置25〇的示意圖。該裝置250之一轉盤260,該轉盤260 之四邊上排列有四室AA、BB、CC、DD,每室各含一軸98。 第一與第二模型空腔256、258對應第一及第二噴出器 252、254,其分別提供融化PET及隔離膜材料。該轉盤260 爲一水平移動機台264連於一機板266所支撐。第二空腔 258藉由促動器268連於該轉盤260,與該轉盤一同水平 移動。促動器268帶動第二空腔258移向位於該轉盤260 上之軸98B,接著該轉盤260水平移動使另一軸移向第一 空腔256。至此,如第23圖所示,該些空腔均已密合,而 第二噴出器254也與第二空腔258相通,以提供融化隔 離膜材料。 經濟部智慧財產局員工消費合作社印製 材料注入完成,則該些空腔打開,先將轉盤260水 平移開再移高該第二空腔。該轉盤260轉90度再重複以 上之過程。前型形成且冷卻於軸98之上。該前型會在該 軸又循環移向第一模型空腔之前被噴走。請參考第24圖, 繪示每一循環中每室對應之位置 請參考第25圖,繪示一製造融化材料之裝置,此融 23 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐) 6073pif.doc/008 Λ __B7__ _ -------- 五、發明說明p\ ) 化材料包含多層薄膜以LIM (Lamellar injecti〇n Molding) 方式形成。該LIM方式會再加以敘述。 (請先閱讀背面之注意事項再填寫本頁) g靑參考弟2 6圖,繪不一·模型軸2 9 8及相對之空腔 300。冷卻管302在空腔300之表面3〇4下呈螺旋狀排列 形成。在閘3〇8旁之空腔3〇〇有一近閘區;306,以及一有 商導熱力插入物310置於近閘區3〇6之空腔3〇〇。因此注 入之前型在靠近近閘區之底端314冷卻很快。 該軸298爲中空而有均句薄壁32〇。一冒泡冷卻器330 置於軸298中’包含一軸管332傳導冷卻劑c至軸298之 底部322 ’冷卻劑C再由出口 3S4散逸。軸管332以橫條 336固定於軸壁320。 請參考第27、28圖,繪示一送氣系統“ο,其形成於 模型空腔300間之接合處342。一溝槽344形成在空腔3〇〇 之四周,此溝槽小到沒有融化材料可進入。一送氣管35〇 連接溝槽344及空氣源,並有閥門調節。在注入融化材料 時,閥門關閉。當注入完成時’閥門打開輸送加壓氣體a 至溝槽344以抒解前型與空腔壁304間之真空。 製造覆蓋隔離膜則型之方法及裝置會再詳述。彳旦之前 會先描述其物理特徵,製備及強化方法。 經濟部智慧財產局員工消費合作社印製 C.鉸谪隔離膜之物理件晳 本發明中較適隔離膜需具備一些物理特性使具隔離膜 之容器比不具隔離膜之容器更易處理且哑靈,此外更須美 觀而具良好隔離能力。 黏者力即爲不同表面之附者力,以分子層面來看,其 24 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐) 474865 6073pif.doc/008 A7 濟 部 智 慧 財 產 局 員 X. 消 費 合 作 社 印 製 B7 五、發明說明) 基本爲分子作用力,與化學鍵、凡得瓦力及分子間作用力 有關。 對噴塑法而言,隔離膜與PET間良好的黏著力是很眞 要的。若是黏著力良好,材料會一體成形沒有孔涧而旦以 容器存在時也爲一體。反之,會造成分層且當容器受外力 較不耐壓。因此本發明較適隔離膜會緊密黏著至pET,而 且二者在22t下不易拉開。
本發明之隔離膜會直接黏著PET,因此與美國專利第 5472753號(Farha)不同。Farha並揭示含苯氧基型熱塑 性材料直接黏著於PET,不用先行與聚酯共聚物混或 用作間層,或直接用在PET上形成隔離膜。 P 玻璃相變溫度(Tg)係指一可結晶之聚合物從_軟狀態 轉成一硬聚合物玻璃所須之溫度,噴塑製程須要材料甘方; 玻璃相變溫度,低於此溫度則材料不具於流動性,過高則 酣料過於柔軟而無法成型。當材料具備類似玻璃相變^囚 度,噴塑溫度應相當類似。當隔離膜材料的玻璃相變— 接近PET的玻璃相變溫度時,噴塑溫度應略高於兩者= 麵變溫度。但是若兩者相去甚遠,則_溫度的選_ 成爲-大難題。材料之玻璃相變溫度在噴塑材料 扮有相當重要之角色。 ' 依據ΡΕΤ在噴誦之_埋,其材料之麵相變溫 度,介於二:C之間。本發明中使用之隔離膜材料的玻 璃相變溫度應介於55〜HOt:之間,9〇〜丨忉它尤 汉 本發明使用之隔離膜材料狀態亦爲重要考:之—。較 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐 C請先間讀背面之注意事項再填寫本頁) ---I----訂----I---- 474865 A7 B7 6073pif.doc/008 五、發明說明(为) 佳的材質爲非結晶型,這是因爲非結晶狀態較適於噴塑成 型,PET可爲結晶狀或非結晶狀,然本發明較傾向於非結 晶態,因爲可以增進不同層間的依附強度。爲了達成此目 的,融熔PET在噴塑過程中急速冷卻,如此結晶過程將受 到壓抑,使得大部份分子處於非結晶態。另外,使用“高 IPA含量之PET”亦可達成相同目的。 -黏度(Intrinsic Viscosity)及熔化參數(Melt Index)通常 爲分子量的函數。此二特性亦爲噴塑製程之重要參數。本 發明使用之隔離膜材料應具備〇·7〜0.9 dl/g之黏度,而 0.74〜0.87 dl/g尤佳,最佳値則爲〇.84〜0.85 dl/g,熔化參 數則爲5〜30,7〜12次佳,10最佳。 本發明使用之隔離膜材料最好具有相似於PET之張力 強度,符合前述條件則外覆層不止成爲磁釉外覆,其甚可 成爲底層PET結構的一部份。外覆材料可因此置換部份 PET而不致影響結構強度。經表層處理及未經表層處理容 器在大小及重量上均不致有重大差異。隔離膜材料的價錢 亦可因此取代部份PET材料的價錢,使得成品總價不因表 層處理而有明顯增加。 外層材料及PET之相似張力強度亦可幫助容器結構之 兀整丨生,本發明建議之條件,可使一已經表層處理之容器 具備未經表層處理容器相同強度,運送及處理可因此採用 相同程序。若外層材料及PET之強度不同,則成品之強度 必有變化。 若成品有光學潔淨度方面之需求,本發明建議採用折 · -----I--t---------線 (請先閱讀背面之注意事項再填寫本頁) 經濟部智慧財產局員工消費合作社印製
474865 A7 B7 6073pif.doc/008 五、發明說明(斗) 射係數與PET相似之隔離膜材料,這對於飮料杯等對透明 度要求較高之應用有非常顯著的影響。 PET對可見光之折射係數約爲uoq·75,本發明建 議之範圍爲1.55〜1.75而以1.55〜1.65尤佳,噴塑成品通常 具備I·55〜1.75之折射係數,詳細數値取決於噴塑之過程, 當噴塑之伸展率小於或等於6:1,則成品之折射係數會偏 低,若噴塑之伸展率接近10:1則折射係數會較高,此處 定義之伸展係數爲軸方向伸展及模切面伸展之綜合。舉例 來說’噴塑成品在軸方向伸展2.5倍和橫切面伸展3 5倍, 則伸展係數定義爲8.75(2.5x3.5)。 PET及隔離膜材料之折射係數比應爲〇.8〜13,以 1.0〜1.2爲佳,1.0〜1.1尤佳。熟知此技藝之人士必然瞭解 折射係數比爲1.0則沒有任何影像扭曲。隨著差距愈大, 則扭曲愈形嚴重。 較谪隔離膜之製備 本發明較適用之隔離膜材料乃由下列材料中任意選擇 其一,包括含苯氧基型熱塑性材料,由間苯二甲酸、鄰苯 一甲酸與任一二元醇縮合成之聚酯隔離膜材料,聚醯胺, 聚萘酸乙酯’聚萘酸乙酯共聚物,聚萘酸乙酯/聚對苯二 甲酸乙酯混和物,及前述之任意組和。 適用之含苯氧基型熱塑性材料可分爲下列幾類: (1)含羥基之聚醯氨醚,其重複的基本單位可爲分子 式la, lb或Ic任一所示:. 27 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐) (請先閲讀背面之注意事項再填寫本頁) --------訂-----I--- 經濟部智慧財產局員工消費合作社印製 474865 6073pif.doc/008 A7 B7 五、發明說明(v< )
la ^^OCH2CCH2OAr一CMH—R1-nJLt-OCHiC^OAr2^— ^ ΟΓ
Ic (2)聚羥基醯氨醚,其重複的基本單位可爲分子式Ila, lib或lie任一所示: 0H 0 0I II 1 II -OCHaCCHaOAr"·—NHC-R1-ChJHAr-
Da ----------I . --------訂---------1 (請先閱讀背面之注意事項再填寫本頁) 經濟部智慧財產局員工消費合作社印製
laCCH2〇Ar- R 0II , CNH—-FI1-
or OH . O
R Ϊ -NHCAp- —00¾jJCHzOAr CNl
lie 28 lib 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐) 474865 6073pif.doc/008 A7 B7 五、發明說明 (3)含醯氨基或含羥甲基之聚醚,其重複的基本單位 可爲分子式ΠΙ所示: 0HI 42|CH2i
OH
izCCH2QA^-R 1·χ ΙΠ (4)含羥基之聚醚,其重複的基本單位可爲分子式IV 所示:
0HI -OCHzCCKzO-R (5)含羥基之聚醚磺氨,其重複的基本單位可爲分子 式Va或Vb任一所示:
0H『0 jj f j)H rOChtCCHzN—Ί-R1—S-NCHijlCH2〇Ar4— Va R 0 0 R (,裝--------訂---------線 (請先閱讀背面之注意事項再填寫本頁) 經濟部智慧財產局員工消費合作社印製 OH I OCHjCCHj-Ijl- R 0=SS:
OH CH2CCH2〇Ar—}- λ
Vb (6)聚羥基酯醚,其重複的基本單位可爲方程式VI所 示: 29 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐) 474865 6073pif.doc/008 A7 B7 五、發明說明
R / OH 0 / I II , -+-0CH2CCHJ0C —R1,
、 / 0 O C ,r1T~i〇C — R1—COC ch2〇h COC·-CHz_
VI (7)經苯氧基酸之共聚物,其重複的基本單位可爲分 子式VII所示: 所示: ⑻聚經__,其驗随本單位可爲分子式
VIII CHjCCHaOAr-
R
VUI 經 濟 部 智 慧 財 產 局 員 工 消 費 合 作 社 印 製 有取3:^3二價之芳雜有取腦織取代基潭 取代之芳麵。基之芳香族或環上 合綱=二或竣甲基取代之二價芳香族之 沒取代基;環上有取價之芳香族有取代基 ;=Γ代之芳香族,多爲_ = 方曰族有職_沒取㈣;環上舞代之二價芳香族; 30 -------I 1 I I .. - I I I I I I I ·11111111 i (請先閱讀背面之注意事項再填寫本頁) 本紙張尺度_巾Η &鮮(cns)A4 297公釐) 474865 6073pif.doc/008 A7 五、發明說明(4 ) 價烯基;二價有取代之烯基;二價有碳被取代之烯基或其混 和。R2爲單價之氫烷基。A爲醯氨基或不同氨基混合。X 爲醯氣基;雙氧芳烯;雙磺氨芳烯;雙竣基芳稀或其混合。Ar3 爲“cardo”基,如下列分子式所示:
-----------* --------訂·-------I . (請先閱讀背面之注意事項再填寫本頁) 經濟部智慧財產局員工消費合作社印製 其中Y可不接,可爲共價鍵或連接基,連接基如氧原 子、硫原子、羰基、磺醯基或甲撐基等。式中之η可爲10 至1000之整數,X爲〇.〇1〜1.0 ’ y爲〇〜0.5。 R1多爲氫烯基代表的是,一二價基大部份爲碳氫化 合物,但有少數環上之非碳取代基,如氧、硫、亞氨、磺 醯等。 分子式I所示含羥基之聚醯氨醚,可由N,N-雙羥苯基 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐) 5 6 8 4 6073pif.doc/008 五 發明說明Μ ) 感,祕美國專卿5089588 醯氨烷或芳烴與雙縮水甘油酿如在美@ 號及第5143998號所示而製成。 _ (請先閱讀背面之注意事項再填寫本頁) 分子式„所示聚羥基醯氨醚,可由N,N-雙羥苯基醯 氨烷、芳烴或如N,N-雙-3-羥苯基己二醯一氨與N,N_雙_3_ 羥苯基戊二醯二氨等兩者以上之混和,加上環氫鹵丙烷, 如在美國專利第5134218號所示而製成。 分子式ΙΠ所示含醯氨基或含經甲基之聚醚’可由雙 縮水甘油醚,如雙酚A加上附著氨基、N-取代之氨基或經 烷基之二元酚形成之雙縮水甘油醚,此一兀酚如:2,2_雙-4-羥苯基乙醯氨或3,5-雙羥基苯醯氨’如在美國專利第 51 15075號及第5218〇75號所示而製成。 分子式IV所示含羥基之聚醚’可由雙縮水甘油醚或 其混和,加上二元酚或其混和,如在美國專利第5164472 號所示而製成。或者,含羥基之聚醚’可由二元酚或其混 和,加上環氫鹵丙烷,如在1963年發表之期刊Applied Polymer Science,Vol 7,第 2135 頁所不而製作。 經濟部智慧財產局員工消費合作社印製 分子式V所示含羥基之聚醚磺氨’可由聚合Ν,Ν-雙 烷基磺氨或Ν,Ν·雙烷基磺氨與雙縮水甘油醚,如在美國專 利第5149768號所示而製成。 分子式VI所示聚羥基酯醚,可由脂肪二元酸或芳香 族二元酸形成之雙縮水甘油醚製成,此脂肪二元酸或芳香 族二元酸如:雙縮水甘油對苯二甲酸,或是由二元酚形成 之雙縮水甘油醚加上脂肪二元酸或芳香族二元酸製成,而 此脂肪二元酸或芳香族二元酸如:己二酸或間苯二甲酸, 32 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公爱) 474865 A7 B7 6073pif.doc/008 五、發明說明(Μ ) 如在美國專利第5171820號所示而製成。 分子式VII所示羥苯氧基醚之共聚物,可由一雙親核 性單元分子,與有取代或沒取代之”cardo”雙酚形成之雙縮 水甘油醚,在適當條件下作用,使雙親核性單元分子與環 氧基作用形成之共聚物,有連結醚基、亞氨基、氨基、磺 氨基或酯基之主鏈並附著羥基,如在美國專利第5184373 號所示而製成。此”cardo”雙酚,例如:9,9-雙-4-羥基苯芴、 酚呔或酚呔亞氨啶。 分子式VIII所示聚羥氨基醚(PHAE),可由二元酚與 二元氨類形成之雙縮水甘油醚,在適當條件下作用,使氨 類與環氧基作用形成之共聚物,有連結醚基、氨基之主鏈 並附著羥基,如在美國專利第5275853號所示而製成。 此八類苯氧基型熱塑性塑膠可向Dow化學公司 (Midland,Michigan)購買 本發明中使用之苯氧基型熱塑性塑膠乃向Phenoxy Associates公司(日本)購買。其製備乃利用如雙酣A之二 元酚與環氫鹵丙烷之縮化反應形成,如在美國專利第 3305528號所示而製成。其分子單元如分子式IV所示,其 中Ar爲異丙叉聯二苯。 本發明中常用之苯氧基型熱塑性塑膠爲分子式III所 示之聚羥氨基醚(PHAE),商業名稱爲XU19040.00L。 本發明中適用之聚酯隔離膜材料及其製備如美國專利 第45782%號所示,加熱間苯二甲酸、對苯二甲酸或其碳 數1〜4之烷基酯其中任一與乙二醇及1,3-雙-2-羥乙氧基苯 33 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐) (請先閱讀背面之注意事項再填寫本頁) _ 裂--------訂---------線 經濟部智慧財產局員工消費合作社印製 474865 A7 B7 6073pift(j〇c/QQg 五、發明說明(V) 反應。此反應更可包括一或多種含二經基以形成酯之碳氫 化合物或雙-4-羥乙氧苯基磺酸鹽。可向Mitsui石化公司(日 本)購貿,商業名稱爲B-010或B-030類。 本發明中適用之聚醯氨隔離膜材料包括MXD-6 ’可向 Mitsubishi Gas Chemical公司購買。其他可用之聚醯氨隔 離膜材料內含1〜10%之聚酯,以1~2%含量較佳,其中聚 酯較適爲PET,最適爲高IPA含量之PET。其他適用之隔 離膜材料包括聚萘酸乙酯,聚萘酸乙酯共聚物,聚萘酸乙 酯/聚對苯二甲酸乙酯混和物,可向Shell化學公司購買。 E. PE之製備 聚酯及其前處理程序,包括使用之單分子、比例、聚 合溫度、觸媒及其他條件,爲眾人所廣泛知悉,相關資訊 請參閱 Encyclopedia of Polymer Science and Engineering, 1988 年版,Johy Wiley &Sons· Vol 12,第 1 〜62 頁。 一般而言,PE由加熱二元或聚羧酸與二元或多元醇 而成。適合的二元或多元羧酸包括多元羧酸、其酯、其酸 酐及其混和物。例如:苯二甲酸、間苯二甲酸、己二酸、 壬二酸、草酸、丙二酸、丁二酸、戊二酸、癸二酸等。對 苯二甲酸爲最常用。α,β-不飽和二元或多元竣酸可取代飽 和二元或多元竣酸。α,β-不飽和二元或多元竣酸可爲如: 馬來酸、富馬酸、烏頭酸、丁庫酸、中庫酸、檸康酸單氯 馬來酸等。 二兀或多兀醇均可用於製備ΡΕ,但是二元醇較視, 包括二甘醇、一縮二丙二醇、乙二醇、1,2-丙二醇、丨,4_丁 34 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐) -----------,.ι裝--------訂---------線‘ (請先閒讀背面之注意事項再填寫本頁) 經濟部智慧財產局員工消費合作社印繫 474865 6073pif.doc/008 A7 B7 經濟部智慧財產局員工消費合作社印製 五、發明說明) 二醇、Μ-戊二醇、1,5-己二醇、丨,4-環己二甲醇等。丨,2_ 丙二醇較適用。其混和物也可使用,但醇一般會比酸多用 一點不會超過20〜25莫耳百分比,大約在2〜10莫耳百分 一般而言’ PE由加熱二元或多元醇及二元或多元羧 酸之混合物而成。100°C〜250°c加熱5〜15小時爲常見之條 件。聚合觸媒如叔丁基鄰苯二酚也常爲人採用。 PET乃爲最常用之PE,多由加熱濃縮對苯二甲酸及 乙二醇而成’可由Dow化學公司(Midland,Michigan)或 Allied 訊號公司(Baton Rouge, LA)購得。 混和有間苯二甲酸(IPA)之PET爲本發明較喜之PET。 IPA之比例爲2〜10°/。’ 3〜8%較佳,4〜5%尤佳,若產品係 用於食品盛裝,IPA比例上限應遵循相關食品衛生規定。 如使用聚醯胺爲外覆材料,較佳選擇爲內含聚醯胺之 PE,聚醯胺之含量可爲1〜10%,以ι〜2%爲佳,所用pE 可爲PET,最好爲高IPA含量PET,可向SKF公司或INCA 公司購買。 g..可加強隱雛膜樹脂之隔離特忤^材料 上述外覆材料可與其它材料混用以提升其性能,一般 而言,材料不具氣密性乃肇因於分子層次之微小孔隙。分 子間力,如氫鍵結,可以協助關閉這些縫隙。加入適當材 料於外覆材料之中,可以應此提升本發明之氣密性。 間本一酣雙羥基苯之衍生物與如PET等外覆材料反應 後可以改善其氣密性。例如:間苯二酚雙縮水甘油醇可用 35
(請先閱讀背面之注意事項再填寫本頁) 裝---- 訂---------線 474865 A7 B7 6073pif.doc/008 五、發明說明οΛ ) 於PHAE ’而羥基乙醚間苯二酚可用於PET及其它聚酯材 料。 一項重要的指標決定材料氣密性即是架上儲存期 (Shelf Life)。當把碳酸飮料儲於32盎司ΡΕτ無覆膜的瓶 子中’其儲存期約爲I2〜16週。架上儲存期是指瓶內仍保 存85°/。二氣化碳的時間。使用PHAE覆膜之瓶子可使儲存 期增至2〜3倍。但用PHAE混以間苯二酚雙縮水甘油醇時, 使儲存期可增至4〜5倍。 另外一種增加氣密性的作法,係於材料中混入微小的 分子’這些小分子可以塡入聚合物孔隙以改善其氣密性。 另一方法乃是加入一物質使氣體之散逸途徑扭曲變長,而 延緩氣體散逸,陶土小分子是一個很好的選擇。 UJ攝離膜物件之製備 一旦外覆材料經選定,接下來之製造程序必定須要提 升外覆材料與前型之黏著力。一般而言,溫度愈高著附著 愈好。儘管室溫下仍有相當之附著,以高溫下處理應爲最 佳方案。 本發明所喜之外覆製程包括:浸覆、噴覆(spray coaling) 靜電粉覆及及火焰流化浸塑法。另外一種方式,薄片噴塑 法(LIM)將於下詳細說明。其它製程已在同發明人申請中 之美國專利序號09/147971中討論,專利名稱“Barrier-Coated Polyester”於 mg 年 10 月 19 日申請。 本發明推薦之製程之“覆塑”(Overmolding),此製程 係將外覆材料噴射至已成型之前型上。當前型亦同爲噴塑 36 本紙張尺度適用中國國豕“準(CNS)A4規格(210 X 297公釐) 11--------- '裝--------訂---------線 (請先閱讀背面之注意事項再填寫本頁) 經濟部智慧財產局員工消費合作社印製 474865 6073pif.doc/008 A7 五、發明說明()沐) 製成時,覆塑外覆材料最好是在前型尙未冷卻前,覆塑製 程可重覆實施’使多層材料疊加於前型上。 覆塑使用之裝置同於未覆膜前型之噴塑製程中所使用 之裝置。第9圖顯示一覆塑模具及一尙未覆膜之前型,模 具分爲含空洞之半型92及含軸之半型94。含空洞之半型 92內有一空腔放置前型,含軸之半型94固定住護瓌38及 壁架_ 96 ’含空洞之半型92包括一組用於通液體之微管 1〇4。導通管之設計連接含空洞之半型92經由微管104到 一導出口,此導出口連接至冷卻系統再回到含空洞之半型 92 ’液體循環其間以冷卻模具。 含軸之半型94包含軸98。突出的軸98位於含軸之半 型94上,插入前型的內腔,除了協助校正前型的中心之 外,軸亦可以協助冷卻前型之內腔,冷卻係經由液體流經 渠溝106貫穿整支軸%。 前型之主體置於模具內腔,然後精確校正於正中央’ 熔融之隔離膜材料然後經由注入孔102噴入模具內並覆於 至少前型主體上。隔離膜材料會充滿模具及前型之空間 100 ° 在進行覆塑製程時,前型應被加溫至略高於玻璃相變 溫度。以PET而言,此溫度介於1〇〇〜200〇c,而以180〜225 °C爲佳。如果高於結晶點(約i2(rc)的溫度被使用,冷卻 過程應快至最少結晶出現的速率,即半結晶態。另一個方 式’則爲使用尙未冷卻之前型。 隔離膜材料加熱至熔融狀態。詳細的溫度取決於模具 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐) (請先間讀背面之注意事項再填寫本頁) --------訂--------線 i . 經濟部智慧財產局員工消費合作社印製 經濟部智慧財產局員工消費合作社印製 474865 第W 號説明書修正夏B7 修正曰斯:,今/ “ 五、發明說明(ο 及機具的種類,以達到適當之黏度爲準則,如果採用前述 建議之隔離膜材料,製程溫度約爲160〜325 °C,而以 200〜275t爲佳。以聚酯隔離膜材料B-010爲例,210°C爲 最佳選擇。而以PHAE XU-19040.00L爲例,160〜260°C皆 可,則200〜280°C更佳,但最佳爲190〜230°C。若用回收 PET則製程溫度爲250〜300°C。 已覆膜之前型應留置於模具內降溫,直至降溫至適當 溫度。所謂適當溫度,係指成品不在因移動搬運而變形。 如果PET爲基材,降溫必須快速至最少結晶出現,即呈半 結晶狀態。隔離膜材料與前型之附著力也可因此有所改 〇 覆塑製程亦可重覆使用以製造多層品,第16圖顯示 一三層之前型132。此前型有兩層覆膜,134及136,其相 對厚度可視製程而變。對熟知此技藝之人士,上述揭示的 製程可被重覆使用以製造多層產品。 第一覆塑法及裝置實施例 本貫施例中覆塑法所用之裝置乃依據Engel (Austria) 33〇-33〇_2〇0型機型。該裝置之較適模型部分在第10〜15 圖中繪示’包含一可轉動的半部142及一靜止的半部144, 皆爲堅硬金屬形成。該靜止的半部144包括二模型部分 146、148 ’而每模型部分有N個(N>〇)模型空腔1 μ、12〇, 冷卻液入口及出口,供冷卻液循環之溝渠,注入裝置,熱 管導引融熔材料由注入裝置導至模型空腔之閘。因爲每丰莫 型部分會形成一前型層’可爲不同材料,因此每部分各有 38 表紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐) (請先閱讀背面之注意事項再填寫本頁) •-------訂------II - -ϋ ϋ _ • n n ϋ . 474865 A7 B7 6073pif.doc/008 五、發明說明(w) 最適條件以配合不同材料。該注入器注入特定材料在特定 溫度經由熱管及閘於特定空腔中,再由各部分之冷卻液循 環冷卻。因此每模型部分可有不同注入溫度,模型溫度, 壓力,注入量,冷卻溫度等來確保特定前型層之操作需要。 可轉動的半部142有一轉盤130及數個固定於轉盤上 之軸98,其對應可使可轉動的半部142水平移向或移開靜 止的半部144。轉盤130可順時針或逆時針轉。軸98可作 爲前型內部之模型,運輸工具及冷卻器。該軸中之冷卻系 統與模型部分之冷卻系統分開。 可轉動的半部M2與靜止的半部144上之模型部分 146、148各有分開之冷卻系統。同理,靜止的半部144上 各模型部分各有冷卻裝置,且與靜止的半部144本身之冷 卻分開。冷卻液由流入模型,流經如第9圖所示之溝渠網 路,再由出口流出。出口接一馬達及一降溫系統以保持冷 卻液在流回模型前溫度適中。 該些軸與空腔以高導熱材料做成,如鈹,再覆以硬金 屬,如錫或硬鉻合金。硬金屬可避免前型與鈹直接接觸, 做噴出輔助及延長使用壽命。高導熱材料可幫助散熱,減 低製造循環時間,可用在全體或局部,至少在軸之尖端。 較適之高導熱材料爲安普考鋁鐵青銅合金金屬插入物 (ampcoloy),可向 Uudenholm 公司購賛。 軸之數目與空腔之數目相等,且其排列也相對應。當 兩半部合在一起時,軸98可對應插入空腔114、120中。 當該軸98完全由模型部分146、148移出,可轉動的半部 39 ------------I i --------訂- - ------- (請先閱讀背面之注意事項再填寫本頁) 經濟部智慧財產局員工消費合作社印製 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐) 474865 經濟部智慧財產局員工消費合作社印製 6073pif.doc/008 _B7_ 五、發明說明(V)) 142上之轉盤130轉動固定於其上之軸98,至下一模型部 分,而可轉動的半部以(360/模型部分之數目)度旋轉。 各模型部分146、148中之空腔的尺寸相同,但彼此 模型部分146、148中之空腔的尺寸不同。前型模型空腔114 尺寸較小,供第一次形成未覆膜之前型。位於模型部分148 之覆膜空腔120尺寸較大,以容納未覆膜之前型及注入隔 離膜材料以覆膜。因此,隨後之覆膜步驟所需之空腔的尺 寸也會更大。 當一列前型成形且完成覆膜後,噴出器也需由軸98 上把前型移走。但此由軸上移走前型之步驟爲各軸獨立 地,或至少各列軸有一噴出器,以確保只有已完成之前型 才被移走。前型被噴至收集桶或輸送帶,或由一機械手臂 之類裝置移至集中地點。 請參考第10,11圖,描述本發明中所運用之方法及 裝置之示意圖。第11圖爲模型靜止的半部144,其中模型 部分146有三個模型空腔114及模型部分148有三個覆膜 空腔120。模型空腔114,類似第9圖中之空腔,材料注 入軸98與模型間,經模型中循環冷卻而成。因此,一完 整之製造循環會做成三個兩層之前型。每模型部分之空腔 可調整以做出不同數目之前型,如第13圖所示,模型靜 止的半部144,其中模型部分146有四十八個模型空腔114 及模型部分148有四十八個覆膜空腔120。而模型部分之 數目也可調整以做出不同層數之前型。 第10圖中描述可轉動的半部142,包括六個軸98固 40 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐)~' ----------- 、裝--------訂---------線 (請先閱讀背面之注意事項再填寫本頁) 474865 經濟部智慧財產局員工消費合作社印製 6073pif.doc/008 五、發明說明(Μ ) 定於轉盤130上,可對應插入靜止的半部144上之空腔114 及120中。第10圖中可轉動的半部142之凸拴110乃對 應插入靜止的半部144之凹座112。當兩半部合在一起時, 凸拴110乃對應插入凹座112,而軸98可對應插入模型空 腔114及覆膜空腔120中央。 此些軸、空腔之排列爲對襯且對應,以使模型轉動一 定角度後仍互相對應。如此之設計可使該前型在同一機台 上以連續步驟之方式,先被塑形再被覆膜。 請參考第14,15圖,繪示一覆塑法之模型的透視圖。 圖中之箭頭代表模型中含軸98可轉動的半部142之轉動 方向。該軸98正要進入模型空腔114與覆膜空腔120中。 請參考第15圖,該軸98離懸於空腔114與120外,而靜 止的半部144上,模型空腔114之冷卻與覆膜空腔120 之冷卻是分開的,而且也與軸98之冷卻分開。圖中之箭 頭代表模型中轉盤130之轉動方向,其轉動帶動軸98由 一空腔轉向另一空腔。 本發明繪示有兩個模型部分製作二層前型。模型對 合,第一注入器注入第一融熔材料,經由第一模型部分 146,熱導管至第模型空腔114形成未覆膜前型。第二注 入器注入第二融熔材料,經由第二模型部分148,熱導管 至第模型空腔120及未覆膜前型間之空洞(第9圖中之 100)。 此過程中,冷卻液循環分別經過三區,146中空腔 H4,148中空腔120與轉動半部142 ;故前型可經由內 41 -------------------訂--------- (請先閱讀背面之注意事項再填寫本頁) 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐〉 474865 6073pif.doc/008 A7 - B7 經濟部智慧財產局員工消費合作社印製 五、發明說明(w ) 部軸冷卻或空腔外之循環冷卻。故各部分H6、H8之, 冷卻條件依其中材料而定並不相同,且與轉動半部142之 冷卻分開’轉動半部142之冷卻可使前型外面在整個過程 中保持冷卻。 轉動半部142之轉動使該軸98離懸於空腔114與120 外’噴出器由才由覆膜空腔中離開之軸98上移走前型至 收集桶或輸送帶。轉盤130轉動180度,使有未覆膜前型 之該軸98 ’在旋轉之後,會對準了覆膜空腔120,而才噴 移走前型之軸98對準模型空腔114。轉盤130之轉動可 快至0.3秒。凸拴110用以對合,當第一注入器注入第一 材料至模型模型114時,第二注入器注入隔離膜材料至 模型模型。 第一實例中描敘雙層前型包含一 PE內層及一隔離膜 外層。其內層最好使用處女PET。如第4圖所示之覆膜前 型60,其在壁部66之總厚度約3mm,包含2mm之處女PET 及約1mm之隔離膜材料。而前型60其它部分上二層之厚 度可以改變’並不一定要與壁部上一樣,注入器注入處女 PET至模型部分146上模型空腔114,而隔離膜材料注入 至模型部分上覆膜空腔120,再經由循環冷卻,最好 是用水冷卻,冷卻溫度〇〜30°C,最好是10〜15°C。模型對 合,融熔處女PET經由124後方注入114中成未覆膜前型 30,注入溫度約250〜320°C,最好爲255〜280°C。模型保 持實合3〜10秒’最好爲4〜6秒,使前型之表面固化,而 中間仍未固化。 42 (請先閱讀背面之注意事項再填寫本頁) 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐) 474865 A7 B7 6073pif.doc/008 五、發明說明(it〇 ) 模型打開,剛形成前型留在軸98上,繼續冷卻。此 冷卻過程要快至使PET結晶最少’呈半結晶狀。當中間pET 卻時’熱合由內向外表面傳導’使已固化外表而又融化此 過程可幫助加速內部冷卻並避免結晶。 轉盤130轉180度使有剛形成前型在其上之軸98對 準了覆膜空腔12〇,而空的軸則對準模型空腔114。模型 對合―。由模型空腔114中移出再至移入覆膜空腔12〇中之 時時,可爲1〜10秒,最好爲1〜3秒。此時,前型之外表 面溫度仍高,可幫助PET與隔離膜之黏著,因爲高溫下表 面之化學反應較活化。隔離膜也可覆於已冷卻之前, 但在覆塑法中,尙未冷卻前進行覆塑較爲有利。 融熔隔離膜材料注入覆膜空腔120中覆在前型上。^ 熔隔離膜材料之溫度範圍爲160〜300°C,依各材料而訂, 例如:PHAE隔離膜材料XU19040.00L其適用ι60〜26(Γ(:, 較適爲200〜240°C,最好爲220〜230°C ;若用B-Oio其適 用160〜260°C ’較適爲190〜250t。此組前型覆膜時,另 組空腔中也形成新的未覆膜前型。 之後’模型打開3〜10秒’最好是4〜6秒。已覆膜前 型由軸98上移走。而另組未覆膜前型繼續覆膜。如此上 述步驟周而復始’使前型不斷地被形成而再被覆膜。因此, 此製程之循環時間不致拉長。 右PET冷卻太'丨受會產生結晶’而則型較佳的材暂爲非 結晶型’追是因爲非結晶狀態較適於噴塑成型,pgT可爲 結晶狀或非結晶狀’然本發明較傾向於非結晶態,因爲可 43 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公髮) -----------v ' ------II 訂-----— — — (請先閱讀背面之注意事項再填寫本頁) 經濟部智慧財產局員工消費合作社印製 474865 A7 B7 6073pif.doc/008 五、發明說明(vi^) 以增進不同層間的依附強度。爲了達成此目的,融熔PET 在噴塑過程中急速冷卻,如此結晶過程將受到壓抑,使得 大部份分子處於非結晶態。 PET層冷卻速度與其厚度及接觸表面溫度有關。如果 模型溫度固定,較厚PET層冷卻較慢,因此會費較長時間 來完成塑形。因此本發明中所形成未覆膜前型會比一般 PET前型薄,但加上覆蓋之隔離膜材料即可補此厚度,且 由於隔離膜材料之物性與PET相近,故對形成容器之物性 影響不大。因爲本發明中未覆膜前型較薄,冷卻較易,可 以比較快由模中移出。一般,結晶後4〜6秒即可移出,而 傳統厚3mm之PET前型費12〜24秒才可移出較費時。總 之,以製造相同厚度來看,製造覆膜前型之時間比製造單 層PET前型之時間多約30%或相當。 此外,因採用之隔離膜材料爲非晶形,不須要像PET 之處理;在覆塑法中製程循環時乃主由PET之冷卻時間而 定,故較薄之未覆膜前型可省時不少,使本發明中製造覆 膜前型之時間,與傳統製程相差不遠。 第4圖中一覆膜前型,其PET層在底端42快之厚度 7〇約爲總厚度的1/3,而底端周圍往上,厚度逐漸增加至 總厚度的2/;3,即壁部66之厚度6S。此厚度維持至護環38。 前型各部位之厚度可不同,但至少維持關鍵厚度。 製做第4圖中前型60比第3圖前型50要省時,因爲 較薄PET所須冷卻時間較短。若前型中PET未足夠冷卻, 會導致結晶影響噴塑過程,此外,在注入融熔隔離膜材料 44 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐) -----------裝--------訂---------線 (請先閱讀背面之注意事項再填寫本頁) 經濟部智慧財產局員工消费合作社印製 474865 A7 B7 6073pif.doc/008 五、發明說明(p) 時’也可能導致部分PET被沖走。因此’第4圖中’前型 60之底端,42因對應者注入閘’故設計較薄易於冷卻’ 以避免前述問題。 第二覆塑法及裝置實施徵 覆塑裝置150適用於製做PET內層’隔離膜外層之前 型。如前述討論的,PET須快速冷卻’減少結晶而呈非晶 形,-便於吹塑。故此實施例之裝置150 ’在移出覆膜空腔 158後,前型仍留在軸98上繼續冷卻,而空出之空腔156,158 供下一批前型使用。 第I7圖繪示覆塑裝置150,漏斗176,178連接注入器 152,154注入融熔材料分至模型空腔156及覆膜空腔158。 模型分爲靜止半部180及轉動半部182,靜止半部180包 含至少二個模型部分184,186,各部分又包含至少一空腔, 第一模型部分184包含至少一個模型空腔156,而第二模 型部分186包含至少一個覆膜空腔158。 此裝置其它部分之系統裝置與前述實施例相似,故不 再詳述’該些裝置部分可向Husky模具公司購買。 第18圖繪示轉動半部182包含一轉盤160,其分爲四 室(A,B,C,D) ’相隔9〇度。四室各含一軸98對應於轉動半 部180中之空腔。但如同前述軸及空腔之數目均可調整, 本例中所示各室只含一軸,故每次只能於每室中形成一前 型’但也可使用不同軸數,例如:每室含3個,8個或多 至48個軸,而空腔之數目也對應調整。 每室中之軸均相同,但圖示中個別標明,如:在A室 45 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公髮) -I I — — — — —--^ . Ϊ.' I ---— I I 訂1 — I I I I I I Ϊ (請先閱讀背面之注意事項再填寫本頁) 經濟部智慧財產局員工消費合作社印製 474865 A7 B7 6073pif.doc/〇〇8 五、發明說明(心) 之軸爲98A。軸98A-D除塑造前型內面外,也有運輸,冷 卻之功用。 本例裝置150使用與前述大約相同之條件,如:注入 時間、材料、溫度等。但此裝置之方位及轉盤60上模型 的排列均調整過,而加強前型之冷卻及機台產能。本例適 用於雙層前型,特別是含隔離膜外層。爲描述整個製程, 以一前型由A室經歷一製程之循環爲例。第19圖繪示每 一循環中每室之情況。 首先,A室之軸98A對準轉動半部182中第一模型部 分184之模型空腔156 ; —促動器162,如水壓汽缸,舉 起轉盤160使軸98A插模型空腔156中。PET注入軸98A 與模型空腔156間並冷卻,使前型表面固化。轉盤160降 低使軸98A移出模型空腔156,而剛形成之前型留在軸98A 上。然後,轉盤160轉90度使軸98A對準第二模型部份 186之覆膜空腔158。轉盤160再上移,使軸9SA插入覆 膜空腔158中,注入隔離膜材料覆在前型上再冷卻。轉盤 160降低,完全之前型仍留在軸98A上;轉盤再轉90度, 而軸98A不對應任何空腔,繼續冷卻,或對應一冷卻系統 163,內含空氣或水冷卻管165以冷卻前型。冷卻之前型 由軸98A上經一噴出器噴移,再由一機械裝置移到一收集 桶或運輸帶。空的軸98A又重復此一循環。同理可見於軸 98B-98D 。 裝置150可改良調整成另一型裝置170,以增加製程 選擇性。如第20,21圖所示,以每室使用一促動器172之 46 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐) ------------- --------訂---------線 (請先閱讀背面之注意事項再填寫本頁) 經濟部智慧財產局員工消費合作社印製 474865 經濟部智慧財產局員工消費合作社印製 6〇73pif.doc/〇〇8 A7 ---------------- 五、發明說明(H) 2式,取代轉盤16〇。因此,每室可經由本身之促動器獨 此操作。故視每室注入材料而定,可適當調整冷卻時間, 不必同時移出空腔。 雖然此實施例在此揭示用於製造雙層前型,但依本例 之原理,可調整裝置依情況製造不同層數之前型。 H三覆塑法及裝置實^_ 第22圖至第24圖繪示—覆塑裝置250,其形成之前 型留在軸上繼續冷卻,直至於卻前型移走,空軸再接續形 成下一前型。覆塑裝置250包含第一模型空腔256,其連 著熱導管至提供融熔PET之注入器252。第二注入器254 乃垂直地固定於第一模型空腔256附近,以提供融熔隔離 膜材料。一以垂直面轉動之轉盤260固定於底座264上, 以軌道266水平滑動。轉動四周分有四室(AA,BB,CC,DD), 各含一軸98AA-98DD。往轉盤260移動第二模型空腔258。 第二模型空腔2〗8乃以一促動器268,如水壓汽缸,來水 平移出或移近對應軸98。如前述所言,各室及各空腔均有 獨立之冷卻系統,熱導管,對合裝置等。 弟22圖繪不覆塑裝置25〇不與任何模型相連,呈打 開狀態,而第23圖繪示覆塑裝置250呈對合狀態。如第23 圖所示,第二注入器254提供融熔材料至第二模型空腔258 中,由打開變至對合狀態,第二模型空腔2%移向轉盤260 與軸98相合,轉盤再水平移動使第一模型空腔256對合 軸98 ’也使第二模型空腔25S與第二注入器254相連。口 下列步驟描敘一雙層覆塑前型之製造。爲描述整個製 47 本纸張尺度適用f國國家標準(CNS)A4規格(210 X 297公釐) -----------厂 ' 裝·-------訂---- - -- -線 1 (請先閱讀背面之注意事項再填寫本頁) 474865 A7 B7 6073pif.doc/008 五、發明說明(g ) 程,以一前型由A室之軸9δΑΑ經歷一製程之循環爲例。 第24圖繪示每一循環中每室之情況。 首先’裝置在打開狀態,而軸98ΑΑ水平空置並對準 第一模型空腔256,而軸98DD上置有單層PET前型垂直 對準第二模型空腔2S8。對合此模型,第二模型空腔258 移向軸98DD,而桌水平移動使軸98AA對合第—模型空 腔256。第一注入器252注入融熔PET至軸98AA及第一 模型空腔256間,而第二注入器254注入融熔隔離膜材料 至第二模型空腔258及PET層之間。經一段冷卻時間使PET 表面固化,轉盤260移動使軸98AA移出第一模型空腔 256,而PET前型留在軸98AA上。第二模型空腔258再 移開軸98DD,而轉盤260轉90度,使軸98AA對準第二 模型空腔258,軸98BB對準第一模型空腔256。對合模型, 一隔離膜層覆於軸98AA上之PET前型,而一 PET前型 形成於軸98BB上。經冷卻,模型打開,轉盤260轉90度’ 使軸98AA不對準任何空腔,而軸上前型繼續冷卻。當轉 盤再轉90度後,軸98AA仍繼續冷卻。冷卻前型由軸98AA 上噴移至輸送帶或轉盤下之收集桶;轉盤260再轉9〇度’ 再度空置以進行下一循環。 雖然本實施例在此揭示用於製造雙層前型,但依本例 之原理,可調整裝置依情況製造不同層數之前型。 薄片噴塑法
隔離膜或具隔離膜前型亦可用薄片噴塑法(LIM)形 成。其特徵即爲融化材料包含了複數微層,本發明中此LIM 48 -------------裝--------訂--------•線 (請先閱讀背面之注意事項再填寫本頁) 經濟部智慧財產局員工消費合作社印製 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐) 6073pif.doc/008 A7 6073pif.doc/008 A7 經濟部智慧財產局員工消費合作社印製 五、發明說明) 融化材料包含複數層以PET及隔離膜交替之微層。薄片噴 塑法可用前述覆塑裝置製造覆有多層微層之物件。 LIM之施行方法之一已揭露在美國專利第52〇2〇74 號,第5540878號及第5628950號中,並在本文中引爲參 考資料。第25圖乃爲LIM系統270之示意圖,圖中系統 27〇乃採用兩種材料,其中一種爲隔離膜材料,但本發明 亦不限於只能應用二種材料。兩種材料分置於漏斗272,274 中連h不冋的柱管276 ’ 278 ;兩種材料同時以一定之相對 量流出’而形成之融化材料包含由二柱管分流出之一層, 再流至一分層系統280。此分層系統28〇把流入之雙層融 化材料,對半截斷,壓扁,重疊而形成四微層,如此不斷 重覆,即可形成許多層微層;如本發明之實施例例,不同 材料之—層乃不斷父替重疊。產生材料再經由出口 282流 出注入模型中以形成以形成前型或用以覆膜。 利用LIM可直接一次形成具隔離膜之前型,只要該些 材料中有一種爲隔離膜材料;而若利用LIM形成前型或其 內層,則所用材料最好均爲FDA核準的,因其與食品會 接觸。 若是如第4圖中所示之前型,以含多層微層之融化材 料注入其覆膜空腔’則此前型即被覆塑以多層微層之隔離 L ’追就7E薄片噴出覆塑法(LIM-over-inject)。其中內層72 最好爲處女PET,而LIM材料最好爲隔離膜材料,如 PHAE,及回收PET。回收PET可用在外層74 ,因爲其不 與飮料接觸且較便宜。第4A圖爲第4圖中壁部3之放大 49 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐) (請先閲讀背面之注意事項再填寫本頁) 訂---------線 經濟部智慧財產局員工消費合作社印製 474865 6073pif.doc/008 A7 -------B7 五、發明說明(iiTj ) 圖’其乃利用薄片噴出覆塑法形成,其內層72爲單一材 料,但外層74乃爲複數微層。 特舉一例以示其製造過程。回收PET經由漏斗272注 入第一柱管276而隔離膜材料經由漏斗274注入第二柱管 278 ;此兩種材料同時以最適爲6〇〜95%回收PET及5〜40% 隔離膜材料之比例流出注入分層系統280。在分層系統中, 重複截斷’壓扁’重疊等步驟至少二次以形成多層微層之 融熔材料’再由出口 282流出注入如第9圖所示之模型。 此融熔材料注入覆塑法裝置之覆膜空腔120 (如第10, η 圖示)’覆於前型上而形成覆有交替隔離膜材料及回收ΡΕΤ 重疊之微層的前型。 另一例子中’處女PET由漏斗272注入第一柱管276, 而B-010由漏斗2M注入第二柱管278,此兩種材料同時 以最適爲60〜95%處女PET及5〜4〇%B-010材料之比例流 出注入分層系統28〇。在分層系統中,重複截斷,壓扁, 重疊等步驟至少二次以形成多層微層之融熔材料,再由出 口 282流出注入如前述覆塑裝置150,25〇之模型空腔156, 256中’以形成含交替隔離膜材料及處女pet重疊微層之 前前型’此前型再於覆膜空腔158,2〗8中覆以回收pET 之外層’此過程稱爲注覆薄片噴塑法(Inject-OVer_UM)。 不論是薄片噴出覆塑法或注覆薄片噴塑法,因LIM製 程製造含不同材料父替重疊微層之內層或外層,而對飮半斗 瓶氣體散逸問題提供更好之保護。 H.模县效率之改善 50 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐) ------------k I------訂--I I-----線 (請先閱讀背面之注意事項再填寫本頁) 474865 A7 B7 6073pif.doc/008 五、發明說明(4) 如前述所討論,各模型半部有一以冷卻劑循環之冷卻 系統,以便散熱。見第26圖爲剖面圖繪示軸2%及空腔 300,冷卻管302螺旋狀排列環繞空腔300之表面304,以 急速冷卻PET以避免其結晶,此外,快速擴散熱能力也可 縮短製程時間,使模型空腔300可再被使用。 空腔300之近閘區306對決定製程時間很重要,因爲, 靠近閘308之空洞部分會接受最後被注入之融化材料,其 對應形成前型之底端314,而此部分若在覆膜之前當未冷 卻,則有部分PET會在覆膜過程中被沖走。因此爲了加速 底端314之冷卻,在近閘區會置上高導熱插入物310,以 例如安普考鋁鐵青銅合金,來幫助快速散熱。可在插入物 310之表面312上覆一薄層之氮化鈦或硬鉻合金用以加強 且保護,此保護薄層之厚度在0.001〜〇.1吋間,最好是0.002 吋厚。 同樣地,軸298爲了加強內層PET之冷卻,刻意把軸 298做成薄壁,(如第26圖示)薄壁320之厚度在0.1〜0.3 吋間,最好是0.2吋厚。而靠近軸298之底端322的壁必 須比軸29δ其它部位的壁薄,以便前型底端314之散熱。 爲了加強冷卻效果,一冒泡冷卻器330可以氣泡式循 環冷卻水。其包含一軸管332置於軸298中央,輸送冷卻 劑C至軸底端322,冷卻劑C在最冷時接觸至底端322, 最快速地冷卻前型之底端314。冷卻劑注入軸底端322, 散逸向上並沿軸壁320繼續冷卻其它部位,再由出口 334 排出。軸管332以橫條336固定於軸壁320。 51 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐) -----------------^-— — — — — —1— ,1 (請先閱讀背面之注意事項再填寫本頁) 經濟部智慧財產局員工消費合作社印製 經濟部智慧財產局員工消费合作社印製 474865 6073pif.doc/008 A7 _____ B7 五、發明說明(叫) 另一方法則是如第4圖所示,製造在近閘區較薄pET 內層之前型’如此一來,則冷卻較易。 爲縮短製程時’完全之前型須儘快移出模型空腔,但 此時前型並不一定已完全固化,而摩擦或吸附力均可能會 使前型遭到損傷。一般而言,模型之內面極爲平滑,但平 滑表面之表面張力會在模具及前型間引起摩擦力,使前型 受損―。所以模具內面會以磨砂機處’使表面較不平滑,減 少表面張力。一般’砂紙之砂礫度爲4〇〇〜7〇〇,最好是砂 礫度600 ;而以縱向打磨,便於移出前型。 同理’模具內面3〇4與前型間會有真空吸附產生,因 此乃利用一送氣系統340 (如第27,28圖示)來解決。送 氣系統340 ’其形成於模型空腔3〇〇間之接合處342。— 溝槽344形成在空腔300之四周,其溝深346在〇.〇〇2〜〇 〇〇5 英吋,最好是0.003英吋。此溝槽小到沒有融化材料可進 入,但可送氣入模型空腔300,以抒解前型會真空吸附於 空腔之問題。一送氣管35〇連接溝槽344及空氣源,並有 閥門調節。在注入融化材料時,閥門關閉。當注入完成時, 閥門打開輸送加壓氣體至溝槽344,以75~150psi之壓力, 最好是lOOpsi之壓力,以抒解前型與空腔壁3〇4間之真空。 雖然圖適中只繪示一溝槽,但其數目及形狀均可依使用裝 置再做調整。 此處所述之改良雖針對本發明之某些裝置而設計,但 也可應用在其他塑型裝置。例如:應用安普考鋁鐵青铜合 金於模具中可加速散熱,可應用於不同型模具與不同材 52 本紙張尺度適用中國國豕標準(CNS)A4規格(210 X 297公爱) ------------ 、裝--------訂---------竣 (請先閱讀背面之注意事項再填寫本頁) 474865 A7 B7 6073pif.doc/008 五、發明說明(θ) 料。而出氣系統及模具表面粗糙化也可應用於不同型模具 與不同材料。 I. 吹塑容器之製ft 覆膜之容器乃由覆膜前型吹塑而成,而其使用之吹塑 方法及條件,如同吹塑未覆膜之PET前型一般。一般而言, 前型加熱至80〜120°C,最好是100〜105°C,並持續一段時 間以平衡,然後再被拉長成所須形成容器之長度,再加壓 吹脹,而塑形成爲容器。 J. 薄片噴塑瓶子之泪丨丨試 本發明中覆前法所用之PET可內含不同量之IPA,並 用PHAE作隔離膜材料。爲測試完成容器之品質,先用覆 塑法做出以不含IPA之PET形成之瓶子,再對該瓶子之 瓶壁施以撞擊,以觀察其耐撞力。發現不含IPA之PET 瓶較不耐撞,且在含多層微層之瓶壁上,會出現剝離。 根據測試結果,瓶壁內層之PET含IPA愈高者,愈 耐撞且較無剝離現象,這表示IPA-PET可增加其與苯氧基 型材料之附著力。 雖然本發明已以較佳實施例揭露如上,然其並非用以 限定本發明,任何熟習此技藝者,在不脫離本發明之精神 和範圍內,當可作各種之更動與潤飾,因此本發明之保護 範圍當視後附之申請專利範圍所界定者爲準。 53 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公爱) ---------I----------^------I-- (請先閱讀背面之注意事項再填寫本頁) 經濟部智慧財產局員工消費合作社印製
Claims (1)
- 5 6 8 4 7 經濟部智慧財產局員工消費合作社印製 ――…..A8 ———1I iL· c|l; ! 6073pif.doc/008 | Γ二: D8十、Itizz:——二」六、申請專利範圍 1. 一種以噴塑形成多層前型之裝置,至少包括: 一第一模型空腔與一第一融熔材料源相通; 一第二模型空腔與一第二融熔材料源相通;以及 一轉盤分爲複數個小室,其中每個小室至少置有一個 模型軸,其中該轉盤可把每個小室從一第一位置轉至一第 二位置再至少至一冷卻位置,在該第一位置上每小室中之 模型姻與模型空腔配合產生一第一前型層,在該第二位置 上每小室中之模型軸與模型空腔配合產生一第二前型層, 在該冷卻位置上該前型冷卻於模型軸上。 2. 如申請專利範圍第1項所述以噴塑形成多層前型 之裝置,其中該轉盤乃採線性移動以便移動該些模型軸來 配合該些模型空腔。 3. 如申請專利範圍第1項所述以噴塑形成多層前型 之裝置,其中該轉盤之每部份皆獨立地線性移動。 4. 如申請專利範圍第1項所述以噴塑形成多層前型 之裝置,其中該模型軸更包括一通渠以便冷卻劑循環。 5. 如申請專利範圍第1項所述以噴塑形成多層前型 之裝置,其中每一小室轉經兩個冷卻位置,而該前型留在 該模型軸上冷卻。 6. 如申請專利範圍第1項所述以噴塑形成多層前型 之裝置,其中更包括一噴射器以便從模型軸上移開該前 型。 7. —種噴塑冷卻形成多層前型之方法,該方法至少 包括下列步驟= 54 If I i ^^1 ^^1 ^^1 n n ^^1 ^^1 i ^^1 ^^1 n n ^^1 n m I »n n n- ^^1 ^^1 I (請先閱讀背面之注意事項再填寫本頁) 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐) 474865 A8 B8 C8 6073pif.doc/008 D8 六、申請專利範圍 提供一模型軸置於一轉盤,該模型軸並有一內部冷卻 系統; (請先閱讀背面之注意事項再填寫本頁) 轉動該轉盤使該模型軸與一第一模型空腔對齊; 對合該模型軸與該第一模型空腔,並注入一融化之材 料以形成一第一前型層; 在該第一模型空腔中冷卻該第一前型層,使其有堅韌 之表面但內面仍爲融態;從該第一模型空腔中移出該模型 軸而該前型層仍留在該模型軸上; 轉動該轉盤使該軸對齊一第二模型空腔; 對合該模型軸與該第二模型空腔,並注入一融化之材 料以在該第一前型層上形成一第二前型層; 從該第二模型空腔中移出該模型軸而該前型層仍留在 該模型軸上; 轉動該轉盤使該軸與該前型對齊一冷卻位置使該前型 冷卻於該模型軸上;以及 從該模型軸上移開該前型。 經濟部智慧財產局員工消費合作社印製 8. —種以噴塑形成多層前型之模型裝置,至少包括: 一第一模型主體用於對合一模型軸以形成一第一層空 腔於其間,該第一模型主體與一第一融熔材料源相連並有 一第一閘區;以及 一第二模型主體用於對合模型軸上之一第一前型層以 形成一第二層空腔於其間,該第二模型主體與一第二融熔 材料源相連並有一第二閘區;其中至少有一閘區置有安普 考銘鐵青銅合金金屬插入物。 55 本紙張尺度適用f國國家標準(CNS)A4規格(210 X 297公釐) 474865 經濟部智慧財產局員工消費合作社印制农 A8 B8 C8 6073pif.doc/008 D8六、申請專利範圍 9. 一種以噴塑形成多層前型之模型裝置,至少包括: 一第一模型主體用於對合一模型軸以形成一第一層空 腔於其間,該第一層空腔有一底端及一主體,該第一模型 主體與一第一融熔材料源相連並有一第一閘區,該閘區鄰 近該第一層空腔之底端,而且該空腔底端厚度比該空腔主 體厚度要薄;以及 一第二模型主體用於對合模型軸上之一第一前型層以 形成一第二層空腔於其間,該第二模型主體與一第二融熔 材料源相連並有一第二閘區。 10. 如申請專利範圍第9項所述以噴塑形成多層前型 之裝置,其中至少有一閘區由安普考鋁鐵青銅合金金屬形 成。 11. 一種以噴塑形成多層前型之模型,至少包括: 一軸及第一、第二空腔,該軸爲中空而有均勻薄壁, 以及一冷卻管置於軸中,傳導冷卻劑至軸之底部,第一空 腔有一閘以注入融化之塑膠,而閘旁空腔之一近閘區有一 插入物,其導熱力較其他大部分空腔之導熱力爲高。 12. 如申請專利範圍第11項所述以噴塑形成多層前 型之模型,其中該空腔以磨砂礫度在400至700間之磨砂 機縱向硏磨。 13. 如申請專利範圍第11項所述以噴塑形成多層前 型之模型,其中該插入物爲安普考鋁鐵青銅合金金屬形 成。 14. 如申請專利範圍第13項所述以噴塑形成多層前 56 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐) ------------- --------訂---------' ί (請先閱讀背面之注意事項再填寫本頁) 經濟部智慧財產局員工消費合作社印製 474865 A8 B8 po 6073pif.doc/008 〇§ 六、申請專利範圍 型之模型,其中該安普考鋁鐵青銅合金插入物有一硬化表 層,厚度在0.001至0.005吋間,該表層組成材質包括氮 化鈦及硬鉻合金。 15. 如申請專利範圍第11項所述以噴塑形成多層前 型之模型,其中包含一噴氣系統置於該第一模型空腔。 16. 如申請專利範圍第15項所述以噴塑形成多層前 型之模型,其中該噴氣系統至少包括一氣源,一開口通向 空腔中,一氣管連著該氣源及該開口以及一閥門位於該氣 源及該開口間。 17. 如申請專利範圍第11項所述以噴塑形成多層前 型之模型,其中一第一空間介於該軸及該第一模型空腔 間,該第一空間可經由空腔之尺寸而調整成在閘處較薄而 在空腔主體處較厚。 18. —種加強噴塑之方法,至少包括下列步驟: 形成一開口於一模型空腔之壁上,該開口之大小調整 到融化塑膠不易進入該開口; 形成一通路連結該開口及一氣壓源;以及 提供一閥門位於該開口及該氣壓源間。 19. 如申請專利範圍第18項所述之加強噴塑之方 法,其中更包括該空腔以磨砂礫度在4〇〇至7〇〇間之磨砂 機硏磨之步驟。 20. 如申請專利範圍第19項所述之加強噴塑之方 法,其中更包括在注入融熔時關上閥門及在注入完成後關 閉閥門步驟。 57 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐) ---------------------訂·-------I 1 (請先閱讀背面之注意事項再填寫本頁) 經濟部智慧財產局員工消費合作社印製 474865 A8 B8 po 6073pif.doc/008 六、申請專利範圍 21. —種夾疊層,包含至少一聚對苯二甲酸乙酯層直 接黏著於至少一隔離膜材料層,該隔離膜材料乃由下列材 料中任意選擇其一,包括聚酯共聚物,含苯氧基型熱塑性 材料,聚醯胺,聚萘酸乙酯,聚萘酸乙酯共聚物,聚萘酸 乙酯/聚對苯二甲酸乙酯混和物,及前述之任意組和;而 聚對苯二甲酸乙酯中間苯二酸之含量至少爲2%重量比。 22. 如申請專利範圍第21項所述之夾疊層,可以一 前型之形式呈現。 23. 如申請專利範圍第21項所述之夾疊層,可以一 容器之形式呈現。 24. 如申請專利範圍第21項所述之夾疊層,其中聚 對‘苯二甲酸乙酯中間苯二甲酸之含量在2%重量比至10% 重量比間。 25. 如申請專利範圍第21項所述之夾疊層,其中聚 對苯二甲酸乙酯中間苯二甲酸之含量在4%重量比至5% 重量比間。 26. 如申請專利範圍第21項所述之夾疊層,其中該 隔離膜材料爲聚羥胺酯。 27. 如申請專利範圍第21項所述之夾疊層,其中該 隔離膜材料爲B-010。 28. 如申請專利範圍第21項所述之夾疊層,其中該 隔離膜材料爲聚醯胺,內含1%重量比至10%重量比之聚 對苯二甲酸乙酯。 29. 如申請專利範圍第21項所述之夾疊層,其中聚 58 --------------------訂·-------· ' . (請先閱讀背面之注意事項再填寫本頁) 本紙張尺度適用中國國家標準(CNS)A4規格(210 x 297公釐) 474865 六 經濟部智慧財產局員工消費合作杜印製 A8 B8 6073pif.doc/008 惡 申請專利範圍 對苯二甲酸乙酯中間苯二甲酸之含量至少在2%重量比以 上。 30. —種前型,至少包括: 一第一層包含間苯二酸之含量至少在2%重量比以上 之聚對苯二甲酸乙酯; 一第二層包含一隔離膜材料,其中該隔離膜材料乃由 下列材料中任意選擇其一,包括聚酯共聚物,含苯氧基型 熱塑性材料,聚醯胺,聚萘酸乙酯,聚萘酸乙酯共聚物, 聚萘酸乙酯/聚對苯二甲酸乙酯混和物,及前述之任意組 和;其中該第一層在底端比在壁處較薄,而該第二層在底 端比在壁處較厚。 ' 31. —種前型,至少包括一頸部及一主體,其中該主 體至少包括: 至少一聚對苯二甲酸乙酯層,其爲間苯二甲酸之含量 至少在2%重量比以上之聚對苯二甲酸乙酯層; 至少一隔離膜材料層直接與該聚對苯二甲酸乙酯層|占 著,其中該隔離膜材料乃由下列材料中任意選擇其―,t 括聚酯共聚物’含苯氧基型熱塑性材料,聚醯胺,聚蔡酸 乙酯,聚萘酸乙酯共聚物,聚萘酸乙酯/聚對苯二甲酸乙 酯混和物,及前述之任意組和。 32. 如申請專利範圍第31項所述之前型,其中聚對 苯二甲酸乙酯中間苯二甲酸之含量在2%重量比至1〇%重 量比間。 33. 如申請專利範圍第31項所述之前型,其中聚對 59 (請先閱讀背面之注意事項再填寫本頁) 裝--------訂--------I . 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐) 474865 A8 B8 C8 D8 6073pif.doc/008 六、申請專利範圍 苯二甲酸乙酯中間苯二甲酸之含量在4%重量比至5%重 量比間。 34. 如申請專利範圍第31項所述之前型,其中該隔 離膜材料爲聚羥胺酯。 35. 如申請專利範圍第31項所述之前型,其中該隔 離膜材料爲B-010。 36. 如申請專利範圍第31項所述之前型,其中該隔 離膜材料爲聚醯胺,內含1%重量比至10%重量比之聚對 苯二甲酸乙酯。 37. —種容器,至少包括一頸部及一主體,其中該主 體至少包括: _至少一聚對苯二甲酸乙酯層,其爲包含間苯二酸之含 量至少在2%重量比以上之聚對苯二甲酸乙酯層; 至少一隔離膜材料層直接與該聚對苯二甲酸乙酯層黏 著,其中該隔離膜材料乃由下列材料中任意選擇其一,包 括聚酯共聚物,含苯氧基型熱塑性材料,聚醯胺,聚萘酸 乙酯,聚萘酸乙酯共聚物,聚萘酸乙酯/聚對苯二甲酸乙 酯混和物,及前述之任意組和。 38. 如申請專利範圍第37項所述之容器,其中聚對 苯二甲酸乙酯中間苯二甲酸之含量在2%重量比至10%重 量比間。 39. 如申請專利範圍第37項所述之容器,其中聚對 苯二甲酸乙酯中間苯二甲酸之含量在4%重量比至5%重 量比間。 60 -------------'裝--------訂---------線: (請先閱讀背面之注意事項再填寫本頁) 經濟部智慧財產局員工消費合作社印製 本紙張尺度適用中國國家標準(CNS)A4規格(210 X 297公釐) 474865 A8 B8 6073pif.doc/008 惡 六、申請專利範圍 40. 如申請專利範圍第37項所述之容器,其中該隔 離膜材料爲聚羥胺酯。 41. 如申請專利範圍第37項所述之容器,其中該隔 離膜材料爲B-010。 42. 如申請專利範圍第37項所述之容器,其中該隔 離膜材料爲聚醯胺,內含1%重量比至10%重量比之聚對 苯二甲酸乙酯。 (請先閱讀背面之注意事項再填寫本頁) .裂----- 訂---------線. 經濟部智慧財產局員工消費合作社印製 6 本紙張尺度適用不
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1999
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