ITMI20090345A1 - REFINED PLASTIC MANUFACTURE AND METHOD FOR ITS REALIZATION. - Google Patents

REFINED PLASTIC MANUFACTURE AND METHOD FOR ITS REALIZATION. Download PDF

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Publication number
ITMI20090345A1
ITMI20090345A1 IT000345A ITMI20090345A ITMI20090345A1 IT MI20090345 A1 ITMI20090345 A1 IT MI20090345A1 IT 000345 A IT000345 A IT 000345A IT MI20090345 A ITMI20090345 A IT MI20090345A IT MI20090345 A1 ITMI20090345 A1 IT MI20090345A1
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IT
Italy
Prior art keywords
photoinitiator
density polyethylene
product
low density
plastic material
Prior art date
Application number
IT000345A
Other languages
Italian (it)
Inventor
Esposito Antonio D
Esposito Davide D
Roberto Mondini
Original Assignee
Esposito Antonio D
Esposito Davide D
Roberto Mondini
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Esposito Antonio D, Esposito Davide D, Roberto Mondini filed Critical Esposito Antonio D
Priority to ITMI2009A000345A priority Critical patent/IT1399163B1/en
Publication of ITMI20090345A1 publication Critical patent/ITMI20090345A1/en
Application granted granted Critical
Publication of IT1399163B1 publication Critical patent/IT1399163B1/en

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Classifications

    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0001—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor characterised by the choice of 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0053—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping
    • 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
    • B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
    • B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
    • B29C2035/0827—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using UV radiation

Description

"MANUFATTO IN PLASTICA PERFEZIONATO E METODO PER LA SUA REALIZZAZIONE" "IMPROVED PLASTIC PRODUCT AND METHOD FOR ITS REALIZATION"

D E S C R I Z I O N E DESCRIPTION

Il presente trovato ha come oggetto un manufatto in plastica perfezionato ed un metodo per la sua realizzazione. The present invention relates to an improved plastic product and a method for its realization.

Come à ̈ noto, per conferire ai prodotti in plastica una maggiore durezza e lucentezza superficiale, i manufatti possono essere rivestiti con prodotti vernicianti di vario tipo. As is known, to give plastic products greater hardness and surface gloss, the products can be coated with various types of paint products.

Nel settore delle vernici e degli inchiostri à ̈ noto, per esempio, l'utilizzo di molecole chiamate "fotoiniziatori". In the field of paints and inks, for example, the use of molecules called "photoinitiators" is known.

I fotoiniziatori sono additivati alla composizione che viene utilizzata per rivestire il manufatto, il quale viene successivamente irradiato mediante lampade UV. The photoinitiators are added to the composition that is used to coat the product, which is subsequently irradiated by UV lamps.

Compito del presente trovato à ̈ quello di realizzare un manufatto in plastica perfezionato che presenti, senza essere verniciato o in altra maniera rivestito, le stesse caratteristiche di durezza e lucentezza superficiale finora ottenibili soltanto tramite successiva verniciatura. The aim of the present invention is to provide an improved plastic product which has, without being painted or coated in any other way, the same characteristics of surface hardness and gloss which up to now have been obtained only by subsequent painting.

NeH’ambito di questo compito, uno scopo del trovato à ̈ quello di realizzare un manufatto di plastica che possa essere prodotto attraverso le varie tecniche di trasformazione comuni alle materie plastiche, nei diversi settori industriali ed in particolare nel settore della componentistica e/o oggettistica. Within the scope of this aim, an object of the invention is to produce a plastic product that can be produced through the various transformation techniques common to plastic materials, in the various industrial sectors and in particular in the component and / or component sector. objects.

Un particolare scopo del presente trovato à ̈ quello di realizzare un manufatto che possa essere prodotto a partire da polimeri di tipo noto adatti alla trasformazione tramite processi di stampaggio/iniezione. A particular object of the present invention is to provide an article that can be produced starting from polymers of a known type suitable for transformation by means of molding / injection processes.

Questo ed altri scopi, che meglio appariranno evidenziati in seguito, sono raggiunti da un manufatto in plastica caratterizzato dal fatto di essere costituito da un materiale polimerico adatto alla trasformazione tramite un processo di stampaggio/iniezione piastica additivato di un fotoiniziatore e successivamente irradiato con radiazione ultravioletta. This and other purposes, which will be better highlighted later, are achieved by a plastic product characterized by the fact of being made of a polymeric material suitable for transformation through a molding / injection process with the addition of a photoinitiator and subsequently irradiated with ultraviolet radiation. .

Secondo il metodo costituente l’oggetto della presente invenzione, si addizionano dei polimeri adatti alla trasformazione tramite un processo di stampaggio/iniezione plastica con dei fotoiniziatori, i quali, eventualmente in combinazione con un coiniziatore, interagiscono onde produrre i radicali reattivi che innescano la polimerizzazione/reticolazione, durante, o successivamente, la fase di stampaggio del manufatto, attraverso l’irraggiamento del manufatto tramite lampade UV o UV prodotto con la tecnica del plasma in vuoto. According to the method constituting the object of the present invention, polymers suitable for transformation are added through a plastic molding / injection process with photoinitiators, which, possibly in combination with a coinitiator, interact to produce the reactive radicals that trigger the polymerization / crosslinking, during, or subsequently, the molding phase of the product, through the irradiation of the product using UV or UV lamps produced with the vacuum plasma technique.

Preferibilmente l'irraggiamento UV ha una lunghezza d'onda compresa tra 100 e 500 nm. Preferably the UV irradiation has a wavelength comprised between 100 and 500 nm.

Il metodo secondo la presente invenzione permettere di realizzare un manufatto plastico che presenta una maggiore durezza e lucentezza superficiale, paragonabile a quanto solitamente si ottiene verniciando le materie plastiche con prodotti vernicianti UV e successivamente irradiati dalle suddette lampade UV. The method according to the present invention makes it possible to produce a plastic product which has a higher surface hardness and gloss, comparable to what is usually obtained by painting the plastic materials with UV coating products and subsequently irradiated by the aforementioned UV lamps.

I materiali plastici oggetto di additivazione, secondo il metodo della presente invenzione possono comprendere i seguenti polimeri: The plastic materials subject to additives, according to the method of the present invention, can comprise the following polymers:

polipropilene (omopolimero, copolimero, random); polypropylene (homopolymer, copolymer, random);

polistirolo cristallo, polistirolo antiurto; crystal polystyrene, shockproof polystyrene;

polietilene a bassa densità; low density polyethylene;

polietilene a bassa densità lineare; linear low density polyethylene;

etilene vinilacetato; ethylene vinyl acetate;

polietilene ad alta densità; high density polyethylene;

polivinilcloruro; polyvinyl chloride;

polimetilmetacrilato; polymethyl methacrylate;

policarbonato; polycarbonate;

stirene aerilo nitrile; styrene aeryl nitrile;

ABS; ABS;

miscele ( blend ) di questi materiali. blends of these materials.

I fotoiniziatori preferibilmente utilizzati nella formulazione della composizione sono compresi nelle famiglie di molecole di diversa natura chimica, di seguito elencate, e sono utilizzati in funzione dell’applicazione specifica del formulato, quali le temperature di processo, l'ambiente di utilizzo dei manufatti, ecc., dei costi di produzione previsti, della natura e conformazione del manufatto, nonché dell'uso a cui à ̈ destinato il manufatto stesso. The photoinitiators preferably used in the formulation of the composition are included in the families of molecules of different chemical nature, listed below, and are used according to the specific application of the formulation, such as the process temperatures, the environment of use of the products, etc., the expected production costs, the nature and conformation of the product, as well as the use for which the product is intended.

I fotoiniziatori possono comprendere i seguenti: Photoinitiators may include the following:

alfa idrossi chetone (Alpha Hydroxy Ketone); alpha hydroxy ketone (Alpha Hydroxy Ketone);

benzofenone ( Benzophenone); benzophenone (Benzophenone);

acilfosfinosside (Acil Phosphine Oxide); acylphosphine oxide (Acyl Phosphine Oxide);

ketosolfone ( Ketosulphone); ketosulfone (Ketosulphone);

benzile dimetil chetale (Benzyldimethylketal); benzyl dimethyl ketal (Benzyldimethylketal);

aminochetone; aminoketone;

tioxanton derivato; derivative thioxanton;

ammine terziarie; tertiary amines;

ed eventualmente miscele di questi fotoiniziatori, o i loro derivati, amalgamati tra loro in percentuali definite. and possibly mixtures of these photoinitiators, or their derivatives, amalgamated with each other in defined percentages.

La percentuale di miscelazione del fotoiniziatore con la materia plastica potrà variare da un minimo di 0,2 % ad un massimo di 30% della massa totale. La sperimentazione permette di individuare la corretta percentuale correlata al tipo di materiale plastico e del fotoiniziatore di base utilizzato. The mixing percentage of the photoinitiator with the plastic material can vary from a minimum of 0.2% to a maximum of 30% of the total mass. The experimentation allows to identify the correct percentage correlated to the type of plastic material and the basic photoinitiator used.

La presente invenzione permette di realizzare manufatti con caratteristiche svariate. The present invention allows to realize manufactured articles with various characteristics.

Ad esempio, una successiva fase di trattamento di rivestimento superficiale con riporto metallico, tramite tecnologia "sputtering" permette di ottenere manufatti con superfici metalliche estetiche e funzionali. For example, a subsequent phase of surface coating treatment with metal coating, by means of "sputtering" technology, allows to obtain products with aesthetic and functional metal surfaces.

I manufatti ottenuti, secondo la presente invenzione, potranno sostituire il vetro nell’industria automobilistica ed in tutti gli impieghi in cui le intrinseche caratteristiche di durezza superficiale e trasparenza siano essenziali alla funzionalità del prodotto; in pratica si potranno realizzare prodotti trasparenti antigraffio. The manufactured articles obtained, according to the present invention, will be able to replace glass in the automotive industry and in all uses in which the intrinsic characteristics of surface hardness and transparency are essential to the functionality of the product; in practice it will be possible to create transparent scratch-resistant products.

I manufatti ottenuti secondo la presente invenzione potranno sostituire la componentistica in plastica, verniciata e non, nell’industria automobilistica e laddove le intrinseche caratteristiche di durezza superficiale siano essenziali alla funzionalità del prodotto. The manufactured articles obtained according to the present invention will be able to replace the plastic components, painted or unpainted, in the automotive industry and where the intrinsic characteristics of surface hardness are essential to the functionality of the product.

Naturalmente i manufatti realizzati secondo la presente invenzione potranno essere impiegati in numerosi e svariati altri campi. Naturally, the manufactured articles according to the present invention can be used in numerous and varied other fields.

Si à ̈ in pratica constatato che il trovato raggiunge il compito e gli scopi prefissati. In practice it has been found that the invention achieves the intended aim and objects.

Si à ̈ infatti realizzato un metodo di fabbricazione di manufatti in plastica, mediante una tecnica di additivazione di fotoiniziatori ai polimeri plastici con l’obbiettivo di trasformarli in manufatti attraverso le varie tecniche di trasformazione comuni alle materie pla stiche, e quindi essere induriti sotto fasci di raggi ultravioletti da utilizzarsi nei diversi settori industriali come componentistica/oggettistica. In fact, a method of manufacturing plastic products has been created, by means of a technique of adding photoinitiators to plastic polymers with the aim of transforming them into products through the various transformation techniques common to plastic materials, and then be hardened under ultraviolet rays to be used in various industrial sectors as components / objects.

Naturalmente i materiali impiegati, nonché le dimensioni, potranno essere qualsiasi secondo le esigenze. Naturally, the materials used, as well as the dimensions, may be any according to requirements.

Claims (7)

RIVENDICAZIONI 1. Manufatto di plastica presentante, senza essere verniciato o in altro modo rivestito, le medesime caratteristiche di durezza e lucentezza superficiale convenzionalmente ottenute mediante verniciatura o rivestimento, detto manufatto essendo costituito da una materia plastica polimerica adatta alla trasformazione tramite un processo di stampaggio ad iniezione, ed essendo addittivata con un fotoinizìatore e irradiata, o durante il processo di iniezione o successivamente ad esso, con una radiazione ultravioletta, detta materia plastica essendo scelta tra polipropilene omopolimerico, copoiimerico, casuale; polistirolo cristallino; polistirolo antiurto; polietilene a bassa densità; polietilene a bassa densità lineare; etilene vinilacetato; polietilene ad alta densità; polivinicloruro; polimetilmetacrilato; policarbonato; stirene acrilonitrile; ABS; miscele di tali materiali, detto fotoiniziatore essendo scelto tra alfa-idrossichetone, benzofenone, acilfosfofinosside, ketosolfone, benziledimetilchetale, aminochetone, tioxanton derivato, ammine terziarie, e eventualmente miscele di tali fotoiniziatori o loro derivati, amalgamati tra loro in percentuali prefissate. CLAIMS 1. Plastic product having, without being painted or otherwise coated, the same characteristics of hardness and surface gloss conventionally obtained by painting or coating, said product being made of a polymeric plastic material suitable for transformation through an injection molding process , and being added with a photoinitiator and irradiated, either during the injection process or subsequently thereto, with an ultraviolet radiation, said plastic material being selected from homopolymer, coopymeric, random polypropylene; crystalline polystyrene; shockproof polystyrene; low density polyethylene; linear low density polyethylene; ethylene vinyl acetate; high density polyethylene; polyvinyl chloride; polymethyl methacrylate; polycarbonate; styrene acrylonitrile; ABS; mixtures of such materials, said photoinitiator being selected from alpha-hydroxyketone, benzophenone, acylphosphophinoxide, ketosulfone, benzyledimethylketal, aminoketone, thioxanton derivative, tertiary amines, and possibly mixtures of said photoinitiators or their derivatives, amalgamated with each other in predetermined percentages. 2. Manufatto secondo la rivendicazione 1 , caratterizzato dal fatto che la percentuale di fotoiniziatore miscelato con il materiale polimerico à ̈ compresa tra 0,2% e 30% della massa totale. 2. Product according to claim 1, characterized in that the percentage of photoinitiator mixed with the polymeric material is between 0.2% and 30% of the total mass. 3. Procedimento per la realizzazione di un manufatto presentante, senza essere verniciato o in altro modo rivestito, le medesime caratteristiche di durezza e lucentezza superficiale convenzional mente ottenute mediante verniciatura o rivestimento, detto procedimento comprendendo le fasi di miscelare a detta materia plastica un fotoiniziatore adatto per formare una miscela atta ad essere trattata in un processo di stampaggio ad iniezione ed irradiare detta miscela con una radiazione ultravioletta durante detto processo di stampaggio/iniezione o successivamente a tale processo di stampaggio di iniezione. 3. Process for manufacturing an article having, without being painted or otherwise coated, the same characteristics of surface hardness and gloss as conventionally obtained by painting or coating, said process comprising the steps of mixing a suitable photoinitiator to said plastic material to form a mixture adapted to be treated in an injection molding process and to irradiate said mixture with an ultraviolet radiation during said molding / injection process or subsequent to said injection molding process. 4. Procedimento secondo la rivendicazione 1 , caratterizzato dal fatto che l'irraggiamento à ̈ effettuato mediante lampade UV o mediante la tecnica del plasma in vuoto e con una lunghezza d’onda compresa tra 100 e 500 nm. 4. Process according to claim 1, characterized in that the irradiation is carried out by means of UV lamps or by means of the vacuum plasma technique and with a wavelength between 100 and 500 nm. 5. Procedimento secondo la rivendicazione 3, caratterizzato dal fatto che la percentuale del fotoiniziatore in detta miscela à ̈ compresa tra 2% e 30% della massa totale di detta miscela. 5. Process according to claim 3, characterized in that the percentage of the photoinitiator in said mixture is comprised between 2% and 30% of the total mass of said mixture. 6. Procedimento secondo la rivendicazione 1 , caratterizzato dal fatto che detta materia plastica à ̈ scelta tra: polipropilene omopolimerico, copolimerico, casuale; polistirolo cristallino; polistirolo antiurto; polietilene a bassa densità; polietilene a bassa densità lineare; etilene vinilacetato; polietilene ad alta densità; polivinicloruro; polimetilmetacrilato; policarbonato; stirene acrilonitrile; ABS; miscele di tali materiali, e che detto fotoiniziatore à ̈ scelto tra alfaidrossichetone, benzofenone, acilfosfofinosside, ketosolfone, benziledimetilchetale, aminochetone, tioxanton derivato, ammine terziarie, ed eventualmente miscele di tali fotoin iziatori o loro derivati, amalgamati tra loro in percentuali prefissate. 6. Process according to claim 1, characterized in that said plastic material is chosen from: homopolymer, copolymer, random polypropylene; crystalline polystyrene; shockproof polystyrene; low density polyethylene; linear low density polyethylene; ethylene vinyl acetate; high density polyethylene; polyvinyl chloride; polymethyl methacrylate; polycarbonate; styrene acrylonitrile; ABS; mixtures of such materials, and that said photoinitiator is selected from alpha-hydroxyketone, benzophenone, acylphosphophinoxide, ketosulfone, benzyledimethylketal, aminoketone, thioxanton derivative, tertiary amines, and possibly mixtures of such photoinitiators or their derivatives, amalgamated with each other in predetermined percentages. 7. Procedimento secondo la rivendicazione 4, caratterizzato dal fatto di comprendere una successiva fase di trattare superficialmente detto manufatto tramite un processo di polverizzazione catodica o sputtering.7. Process according to claim 4, characterized in that it comprises a subsequent step of superficially treating said product by means of a cathodic sputtering or sputtering process.
ITMI2009A000345A 2009-03-09 2009-03-09 PERFORMED PLASTIC MANUFACTURE AND METHOD FOR ITS REALIZATION. IT1399163B1 (en)

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ITMI2009A000345A IT1399163B1 (en) 2009-03-09 2009-03-09 PERFORMED PLASTIC MANUFACTURE AND METHOD FOR ITS REALIZATION.

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0831119A2 (en) * 1996-09-18 1998-03-25 Daicel Chemical Industries, Ltd. Corsslinkable polymer composition, molded article therefrom, process for the preparation thereof, crosslinked nonwoven cloth, and process for the preparation thereof
US6355723B1 (en) * 2000-06-22 2002-03-12 General Electric Co. Dark colored thermoplastic compositions, articles molded therefrom, and article preparation methods
EP1790680A1 (en) * 2005-11-28 2007-05-30 Mnemoscience GmbH Verfahren zur Herstellung von Form-Gedächtnis Materialien aus standard thermoplastichen Polymeren
US20080085946A1 (en) * 2006-08-14 2008-04-10 Mather Patrick T Photo-tailored shape memory article, method, and composition
EP2075279A1 (en) * 2007-12-28 2009-07-01 Mnemoscience GmbH Production of shape memory polymer articles by molding processes

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0831119A2 (en) * 1996-09-18 1998-03-25 Daicel Chemical Industries, Ltd. Corsslinkable polymer composition, molded article therefrom, process for the preparation thereof, crosslinked nonwoven cloth, and process for the preparation thereof
US6355723B1 (en) * 2000-06-22 2002-03-12 General Electric Co. Dark colored thermoplastic compositions, articles molded therefrom, and article preparation methods
EP1790680A1 (en) * 2005-11-28 2007-05-30 Mnemoscience GmbH Verfahren zur Herstellung von Form-Gedächtnis Materialien aus standard thermoplastichen Polymeren
US20080085946A1 (en) * 2006-08-14 2008-04-10 Mather Patrick T Photo-tailored shape memory article, method, and composition
EP2075279A1 (en) * 2007-12-28 2009-07-01 Mnemoscience GmbH Production of shape memory polymer articles by molding processes

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