GB2080199A - Laminated thermoplastic product and articles produced therefrom - Google Patents

Laminated thermoplastic product and articles produced therefrom Download PDF

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Publication number
GB2080199A
GB2080199A GB8122584A GB8122584A GB2080199A GB 2080199 A GB2080199 A GB 2080199A GB 8122584 A GB8122584 A GB 8122584A GB 8122584 A GB8122584 A GB 8122584A GB 2080199 A GB2080199 A GB 2080199A
Authority
GB
United Kingdom
Prior art keywords
impact
polymethylmethacrylate
laminated product
laminated
product
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
GB8122584A
Other versions
GB2080199B (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Montedison SpA
Original Assignee
Montedison SpA
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 Montedison SpA filed Critical Montedison SpA
Publication of GB2080199A publication Critical patent/GB2080199A/en
Application granted granted Critical
Publication of GB2080199B publication Critical patent/GB2080199B/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/308—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising acrylic (co)polymers
    • 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
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • 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
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • 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
    • B32B2250/00—Layers arrangement
    • B32B2250/02—2 layers
    • 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
    • B32B2250/00—Layers arrangement
    • B32B2250/24—All layers being polymeric
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/558—Impact strength, toughness
    • 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
    • B32B2333/00—Polymers of unsaturated acids or derivatives thereof
    • B32B2333/04—Polymers of esters
    • B32B2333/12—Polymers of methacrylic acid esters, e.g. PMMA, i.e. polymethylmethacrylate

Landscapes

  • Laminated Bodies (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)

Abstract

A laminated product made of thermoplastic material, which comprises at least one layer of polymethylmethacrylate and at least one layer of high-impact polymethylmethacrylate.

Description

SPECIFICATION Laminated thermoplastic product and articles produced therefrom The present invention relates to a laminated product made of thermoplastic mateial and to finished articles produced therefrom. More particularly the invention relates to a laminated product made of polymethylmethacrylate (PMMA) having improved mechanical characteristics and easy processability, as well as to finished goods obtained therefrom by thermomolding.
It is known to produce PMMA sheets by extrusion and succesive calendering through sets of rollers. Likewise, it is known to produce from such sheets shaped articles such as hydrosanitaries (baths, kitchen sinks, wash basins, shower footboards and partitions), luminous publicity sign boards, light fittings (such as ceiling lights), skylights and light domes, and partition panels for furnishings and for the building industry. Such articles are generally obtained by the known thermomolding technique, by heating the PMMA sheets and shaping them in suitable molds.
The heating of the sheets in general is carried out in an oven in which the sheets are arranged vertically, suspended by their upper ends with suitable pincers. In the first few minutes of the heating, the heat causes dimensional shrinkage of the sheets, due to settling of the internal stresses occurring during the extrusion stage of the sheets and the successive calendering.
After this settling, owing to the temperature attained by the sheets under operating conditions (a temperature which is higher than the glass-transition temperature of the material), there occurs an elongation stage of the sheets themselves, caused by creep of the material. In the case of PMMA sheets, when applying the usual heating times, there were found to occur elongations greater than 10%, with ensuing dimensional variations and problems in the successive thermomolding processing of the desired articles.
Moreover, the finished products thus obtained display excellent aesthetic characteristics and good weatherproof properties, but have poor mechanical resistance characteristics; for instance they have a low impact resistance.
In some applications, such as in the production from PMMA sheets of hydrosanitaries, it is important that the article obtained therefrom also has good mechanical characteristics; it is important that the articles not only has a good rigidity, which may be achieved by reinforcing the manufactured articles with a polyester resin, for instance containing glass fibres, but that it also has a good impact resistance.
The present invention provides a laminated product made of thermoplastic material, which comprises at least one layer of polymethylmethacrylate and at least one layer of high-impact polymethylmethacrylate.
In the laminated product the high-impact polymethylmethacrylate layer preferably appears as a substrate.
The polymethylmethacrylate (PMMA) layer suitably comprises a methacrylic based resin obtained by a known conventional polymerization method (suspension, emulsion polymerization, etc) and may comprise a homopolymer of methylmethacrylate or a copolymer of methylmethacrylate preferably with methyl-or ethylacrylate, in quantities varying from 2% to 10% by weight.
The high-impact PMMA layer preferably comprises a methacyrlic based resin in which are homogeneously dispersed particles of an acrylic-based elastomer; the resin is itself known and is prepared according to a well known polymerization and grafting process.
The laminated product of the present invention may be suitably obtained by coupling together by a well known system, for instance by calendering under heat an extruded PMMA sheet with a high-impact polymethylmethacrylate film.
For the preparation of both the PMMA sheet and the high-impact polymethylmethacrylate film suitable already known materials are commercially available. For instance, for the production of the PMMA sheet there may be a conveniently used the polymethacrylic resin produced by Montedison S.p.A. under the name "VENDRIL" (Registered Trade Mark), while for the production of the high-impact polymethacrylate film there may be used the high-impact polymethacrylate OROGLAS DR 100EG resin (Registered Trade Mark) produced by Röhm 8 Haas.
The laminated product of the present invention is preferably produced by coupling together an extruded PMMA sheet, directly during the heat calendering stage of the sheet being extruded, with a high-impact polymethylmethacrylate film previously produced by either calendering or by extrusion.
The thickness of the polymethylmethacrylate film depends on the type of product that it is desired to obtain, and is generally from 0.2 to 1.0 mm.
The invention will be further described, by way of example only, with reference to the accompanying drawing, which schematically illustrates a process for the preparation of a laminated product of the present invention.
In the process shown in the drawing PMMA is extruded by an extruder 1, in the form of a sheet 2, which is then passed between calendering cylinders 3, 4 and 5 of a calender. During the passage of the sheet between the calendering cylinders 4 and 5, there is effected its stable coupling with a high-impact polymethyimethacrylate film 6 which comes from a reel 7.
The thus obtained coupled product 8 is then cooled down on cooling rollers 9, to obtain the final laminated product of the invention.
Reference numbers 10 and 11 indicate dragging rollers respectively for the high-impact film and for the laminated product, while reference numbers 1 2 and 1 3 respectively indicate guiding rollers.
Using the polmethacrylic resin VEDRIL, produced by Montedison S.p.A., and a high-impact film obtained from the OROGLAS DR 100 EGG resin produced by Röhm 8 Haas, there have been produced laminated products by the process described above.
There were then prepared sheets having a total thickness of 3 and 5 mm, in which the thickness of the high-impact film was respectively 0.3, 0.6, 0.8 and 1.0 mm. Following the same procedures there were then prepared sheets of the same thickness of 3 and 5 mm, but without the high-impact film.
From these sheets were then prepared test pieces to be subjected to impact-resistance tests according to the British Standards Institution, BS-2782 -306/B. The tests were conducted by subjecting the test pieces to impacts on the side opposite to that of the high-impact film.
The results that were obtained are given in the Table below.
TABLE Thickness of Impact Total Thickness high impact resistance TEST No of sheets in mm film in mm Kg cm/cm 1 3 13.2 2 3 0.3 16.0 3 3 0.6 21.6 4 3 0.8 23.7 5 3 1.0 24.3 6 5 18.7 7 5 0.3 23.1 8 5 0.6 26.4 9 5 0.8 27.8 10 5 1.0 31.5 From the above table it is clearly apparent that the laminated products of the present invention (tests 2 to 5 and 7 to 10) have an improved impact resistance with respect to the sheets made of polymethylmethacrylate only (tests 1 and 6).
The laminated products obtained according to the present invention have been subjected to heating, in order to be successively heat-molded into articles of various types, and no significant elongation could be detected at the end of the heating itself.

Claims (9)

1. A laminated product made of thermoplastic material, which comprises at least one layer of polymethylmethacrylate and at least on layer of high-impact polymethylmethacrylate.
2. A laminated product as claimed in claim 1, wherein the high-impact polymethylmethacrylate layer is a substrate.
3. A laminated product as claimed in claim 1 or 2, wherein the polymethyimethacrylate is a homopolymer of methylmethacrylate.
4. A laminated product as claimed in claim 1 or 2, wherein the polymethylmethacrylate is a copolymer of methylmethacrylate with methyl- or ethylacrylate.
5. A laminated product as claimed in any one of claims 1 to 4, wherein the high-impact polymethylmethacrylate comprises a methacrylic resin in which are dispersed particles of an elastomer.
6. A laminated product as claimed in any of claims 1 to 5, wherein the high-impact polymethylmethacrylate is a film.
7. A lamiated product as claimed in claim 6, wherein the said film has a thickness of from 0.2 to 1.0 mm.
8. A laminated thermoplastic product according to claim 1, substantially as herein described.
9. A manufactured article obtained by using a laminated product as claimed in any of claims 1 to 8.
GB8122584A 1980-07-24 1981-07-22 Laminated thermoplastic product and articles produced therefrom Expired GB2080199B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT23657/80A IT1132231B (en) 1980-07-24 1980-07-24 THERMOPLASTIC LAMINAR PRODUCT AND ITEMS OBTAINED FROM IT

Publications (2)

Publication Number Publication Date
GB2080199A true GB2080199A (en) 1982-02-03
GB2080199B GB2080199B (en) 1984-07-11

Family

ID=11208937

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8122584A Expired GB2080199B (en) 1980-07-24 1981-07-22 Laminated thermoplastic product and articles produced therefrom

Country Status (6)

Country Link
DE (1) DE3128985A1 (en)
DK (1) DK162513C (en)
FR (1) FR2487248A1 (en)
GB (1) GB2080199B (en)
IT (1) IT1132231B (en)
SE (1) SE454151B (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2640909A1 (en) * 1988-12-22 1990-06-29 Norsolor Sa Reinforced thermoformed shell and its method of manufacture
EP0419166A2 (en) * 1989-09-18 1991-03-27 ELF ATOCHEM ITALIA S.r.l. Coextruded multilayer sheets and a process for preparing the same
EP0454520A1 (en) * 1990-04-27 1991-10-30 Société dite : TECHNOPLAST (Société Anonyme) Method for producing a composite sheet comprising a cast polymethylmethacrylate sheet and a thermoplastic support layer and product obtained in such a way
AT401494B (en) * 1994-09-06 1996-09-25 Klepsch Senoplast COMPOSITE PLATE
GB2306391A (en) * 1995-10-24 1997-05-07 Joseph Anthony Hanson Washing station
WO1999029766A1 (en) * 1997-12-05 1999-06-17 Röhm Gmbh Method for producing surface-hardened pmma films which are highly glossy on both sides, free of gel bodies and can be manipulated in the 'film-insert-moulding' method
EP1573150A1 (en) 2002-09-16 2005-09-14 Röhm GmbH & Co. KG Articles made of pmma molding compound
US8034441B2 (en) * 2005-07-08 2011-10-11 Arkema France Multilayer composition
EP2653282A1 (en) * 2012-04-20 2013-10-23 New Bath Method for producing a sheet of composite material

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1223699A (en) * 1983-03-23 1987-06-30 Delmas B. Pennington Crack propagation resistant acrylic sheet
DE4436381A1 (en) 1994-10-12 1996-04-18 Roehm Gmbh Composites of thermoplastic layers for sanitary articles
TW477806B (en) † 1996-02-16 2002-03-01 Sumitomo Chemical Co Methylacrylate film and its molded article
DE10012421A1 (en) * 2000-03-15 2001-09-20 Roehm Gmbh Hot pressure bonding of plastics, e.g. transparent acrylic parts, involves coating the surface of the components with lower softening point material
CA2490733A1 (en) * 2003-12-12 2005-06-12 Arkema Multi-layer acrylic film with improved optical and mechanical properties

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3026574A (en) * 1957-07-30 1962-03-27 Techniform Inc Process for molding a foamable shell onto a sponge base
US2983962A (en) * 1960-03-15 1961-05-16 Monsanto Chemicals Method for preparing laminated resin foam structures
US3189243A (en) * 1963-05-21 1965-06-15 Haveg Industries Inc Containers made from plastic foam sheet
NL6708974A (en) * 1966-06-30 1968-01-02
FR2010499B1 (en) * 1968-05-31 1973-12-21 Toyo Rayon Co Ltd
CH603357A5 (en) * 1976-07-23 1978-08-15 Lonza Ag
US4158585A (en) * 1977-02-02 1979-06-19 Wright Melvin A Washbasin liner method and article
DE2730899A1 (en) * 1977-07-08 1979-02-01 Basf Ag Decorative thermoplastic laminates for sanitary applications - with transparent top layer over a patterned substrate
US4169180A (en) * 1977-09-16 1979-09-25 Stauffer Chemical Company Resin laminate having protective layer

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2640909A1 (en) * 1988-12-22 1990-06-29 Norsolor Sa Reinforced thermoformed shell and its method of manufacture
EP0419166A2 (en) * 1989-09-18 1991-03-27 ELF ATOCHEM ITALIA S.r.l. Coextruded multilayer sheets and a process for preparing the same
EP0419166A3 (en) * 1989-09-18 1992-02-26 Vedril S.P.A. Coextruded multilayer sheets and a process for preparing the same
US5180634A (en) * 1989-09-18 1993-01-19 Elf Atochem Italia S.R.L. Coextruded multilayer and a process for preparing the same
EP0454520A1 (en) * 1990-04-27 1991-10-30 Société dite : TECHNOPLAST (Société Anonyme) Method for producing a composite sheet comprising a cast polymethylmethacrylate sheet and a thermoplastic support layer and product obtained in such a way
FR2661364A1 (en) * 1990-04-27 1991-10-31 Technoplast PROCESS FOR MANUFACTURING A SHEET OF A COMPOSITE MATERIAL COMPRISING A CAST METHYL POLYMETHACRYLATE PLATE COMPRISING A THERMOPLASTIC SUPPORT LAYER AND PRODUCTS OBTAINED
AT401494B (en) * 1994-09-06 1996-09-25 Klepsch Senoplast COMPOSITE PLATE
GB2306391B (en) * 1995-10-24 1999-05-19 Joseph Anthony Hanson Washing station
GB2306391A (en) * 1995-10-24 1997-05-07 Joseph Anthony Hanson Washing station
WO1999029766A1 (en) * 1997-12-05 1999-06-17 Röhm Gmbh Method for producing surface-hardened pmma films which are highly glossy on both sides, free of gel bodies and can be manipulated in the 'film-insert-moulding' method
US6475420B1 (en) * 1997-12-05 2002-11-05 Roehm Gmbh Process of making a glossy film
US8043691B2 (en) 1997-12-05 2011-10-25 Evonik Roehm Gmbh Process of making a glossy film
EP1573150A1 (en) 2002-09-16 2005-09-14 Röhm GmbH & Co. KG Articles made of pmma molding compound
US7456239B2 (en) 2002-09-16 2008-11-25 Roehm Gmbh & Co., Kg Articles made of PMMA molding compound
US8034441B2 (en) * 2005-07-08 2011-10-11 Arkema France Multilayer composition
EP2653282A1 (en) * 2012-04-20 2013-10-23 New Bath Method for producing a sheet of composite material
FR2989616A1 (en) * 2012-04-20 2013-10-25 New Bath METHOD FOR MANUFACTURING A SHEET OF A COMPOSITE MATERIAL

Also Published As

Publication number Publication date
IT1132231B (en) 1986-06-25
DK322981A (en) 1982-01-25
SE8104450L (en) 1982-01-25
DE3128985C2 (en) 1992-09-03
DK162513C (en) 1992-03-30
SE454151B (en) 1988-04-11
GB2080199B (en) 1984-07-11
FR2487248A1 (en) 1982-01-29
DK162513B (en) 1991-11-11
DE3128985A1 (en) 1982-05-06
FR2487248B1 (en) 1984-09-28
IT8023657A0 (en) 1980-07-24

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PE20 Patent expired after termination of 20 years

Effective date: 20010721