IT999716B - Procedimento per la fabbricazione di pannelli agglomerati e prodotti che ne risultano - Google Patents
Procedimento per la fabbricazione di pannelli agglomerati e prodotti che ne risultanoInfo
- Publication number
- IT999716B IT999716B IT70220/73A IT7022073A IT999716B IT 999716 B IT999716 B IT 999716B IT 70220/73 A IT70220/73 A IT 70220/73A IT 7022073 A IT7022073 A IT 7022073A IT 999716 B IT999716 B IT 999716B
- Authority
- IT
- Italy
- Prior art keywords
- procedure
- manufacture
- resulting products
- agglomerated panels
- agglomerated
- Prior art date
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
- B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
-
- 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
- B32B19/00—Layered products comprising a layer of natural mineral fibres or particles, e.g. asbestos, mica
- B32B19/04—Layered products comprising a layer of natural mineral fibres or particles, e.g. asbestos, mica next to another layer of the same or of a different material
- B32B19/045—Layered products comprising a layer of natural mineral fibres or particles, e.g. asbestos, mica 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
- B32B19/00—Layered products comprising a layer of natural mineral fibres or particles, e.g. asbestos, mica
- B32B19/08—Layered products comprising a layer of natural mineral fibres or particles, e.g. asbestos, mica comprising asbestos
-
- 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
- B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
- B32B21/04—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B21/08—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood 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
- 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
- B32B27/10—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 paper or cardboard
-
- 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
- B32B27/14—Layered products comprising a layer of synthetic resin next to a particulate layer
-
- 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
- B32B27/28—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
-
- 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
- B32B27/40—Layered products comprising a layer of synthetic resin comprising polyurethanes
-
- 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
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
-
- 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
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/16—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer formed of particles, e.g. chips, powder or granules
-
- 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
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
-
- 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
- B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
- B32B9/002—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising natural stone or artificial stone
-
- 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
- B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
- B32B9/02—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising animal or vegetable substances, e.g. cork, bamboo, starch
-
- 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
- B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
- B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B9/045—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance 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
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/001—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing unburned clay
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
- E04C2/26—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups
- E04C2/284—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups at least one of the materials being insulating
-
- 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
- B32B2315/00—Other materials containing non-metallic inorganic compounds not provided for in groups B32B2311/00 - B32B2313/04
- B32B2315/08—Glass
-
- 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
- B32B2315/00—Other materials containing non-metallic inorganic compounds not provided for in groups B32B2311/00 - B32B2313/04
- B32B2315/12—Asbestos
-
- 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
- B32B2315/00—Other materials containing non-metallic inorganic compounds not provided for in groups B32B2311/00 - B32B2313/04
- B32B2315/14—Mineral wool
-
- 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
- B32B2315/00—Other materials containing non-metallic inorganic compounds not provided for in groups B32B2311/00 - B32B2313/04
- B32B2315/16—Clay
-
- 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
- B32B2317/00—Animal or vegetable based
- B32B2317/10—Natural fibres, e.g. wool, cotton
-
- 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
- B32B2317/00—Animal or vegetable based
- B32B2317/12—Paper, e.g. cardboard
-
- 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
- B32B2317/00—Animal or vegetable based
- B32B2317/16—Wood, e.g. woodboard, fibreboard, woodchips
-
- 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
- B32B2318/00—Mineral based
- B32B2318/04—Stone
-
- 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
- B32B2375/00—Polyureas; Polyurethanes
-
- 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
- B32B2607/00—Walls, panels
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Civil Engineering (AREA)
- Dispersion Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Laminated Bodies (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
- Finishing Walls (AREA)
- Producing Shaped Articles From Materials (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7238746A FR2204999A5 (en) | 1972-11-02 | 1972-11-02 | Composite compression-moulded panels - with at least one silico-alkali layer |
FR7335979A FR2246382A2 (en) | 1973-10-09 | 1973-10-09 | Composite compression-moulded panels - with at least one silico-alkali layer |
Publications (1)
Publication Number | Publication Date |
---|---|
IT999716B true IT999716B (it) | 1976-03-10 |
Family
ID=26217376
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT70220/73A IT999716B (it) | 1972-11-02 | 1973-11-05 | Procedimento per la fabbricazione di pannelli agglomerati e prodotti che ne risultano |
Country Status (9)
Country | Link |
---|---|
US (1) | US3950470A (it) |
JP (1) | JPS5122955B2 (it) |
AT (1) | ATA923473A (it) |
CA (1) | CA1019517A (it) |
CH (1) | CH580483A5 (it) |
GB (1) | GB1434807A (it) |
IT (1) | IT999716B (it) |
NL (1) | NL7314679A (it) |
SE (1) | SE395650B (it) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4466937A (en) * | 1981-10-08 | 1984-08-21 | Wessex Mosaic Studies Ltd. | Production of Venetian mosaic surfaces |
JPS61172029U (it) * | 1985-04-15 | 1986-10-25 | ||
JPS6435835U (it) * | 1987-08-27 | 1989-03-03 | ||
US5637412A (en) * | 1990-05-18 | 1997-06-10 | E. Khashoggi Industries | Compressed hydraulically bonded composite articles |
US5169566A (en) * | 1990-05-18 | 1992-12-08 | E. Khashoggi Industries | Engineered cementitious contaminant barriers and their method of manufacture |
US5356579A (en) * | 1990-05-18 | 1994-10-18 | E. Khashoggi Industries | Methods of manufacture and use for low density hydraulically bonded cement compositions |
AU7962291A (en) * | 1990-05-18 | 1991-12-10 | E. Khashoggi Industries | Hydraulically bonded cement compositions and their methods of manufacture and use |
US5100586A (en) * | 1990-07-20 | 1992-03-31 | E. Khashoggi Industries | Cementitious hazardous waste containers and their method of manufacture |
US5474606A (en) * | 1994-03-25 | 1995-12-12 | Ashland Inc. | Heat curable foundry binder systems |
US5626665A (en) * | 1994-11-04 | 1997-05-06 | Ash Grove Cement Company | Cementitious systems and novel methods of making the same |
US5820668A (en) * | 1995-12-22 | 1998-10-13 | Ib Technologies Llc | Inorganic binder composition, production and uses thereof |
US5900202A (en) * | 1997-09-26 | 1999-05-04 | Lingart; Youri | Method for making glass silicate tiles |
KR20110069743A (ko) * | 2007-12-20 | 2011-06-23 | 유니버시티 오브 센트럴 플로리다 리서치 파운데이션, 인코포레이티드 | 저탄소배출 구조재료 |
AR066896A1 (es) * | 2008-07-07 | 2009-09-23 | Tito Veronica | Procedimiento para la fabricacion de ladrillos a partir de recortes geologicos provenienetes de la perforacion de pozos |
CN104677708B (zh) * | 2015-02-11 | 2017-04-05 | 绍兴文理学院 | 一种纳米水泥土真三轴试样的制样方法 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3193440A (en) * | 1961-08-16 | 1965-07-06 | Freeman Chemical Corp | Laminated articles and laminating preforms therefor |
US3778281A (en) * | 1971-12-16 | 1973-12-11 | Grace W R & Co | Fusion bonded vermiculite molding material |
-
1973
- 1973-10-25 NL NL7314679A patent/NL7314679A/xx not_active Application Discontinuation
- 1973-10-29 US US05/410,490 patent/US3950470A/en not_active Expired - Lifetime
- 1973-10-29 CH CH1518873A patent/CH580483A5/xx not_active IP Right Cessation
- 1973-10-30 SE SE7314711A patent/SE395650B/xx unknown
- 1973-11-01 GB GB5078373A patent/GB1434807A/en not_active Expired
- 1973-11-01 CA CA184,835A patent/CA1019517A/en not_active Expired
- 1973-11-02 JP JP48122950A patent/JPS5122955B2/ja not_active Expired
- 1973-11-02 AT AT923473A patent/ATA923473A/de not_active Application Discontinuation
- 1973-11-05 IT IT70220/73A patent/IT999716B/it active
Also Published As
Publication number | Publication date |
---|---|
CA1019517A (en) | 1977-10-25 |
CH580483A5 (it) | 1976-10-15 |
SE395650B (sv) | 1977-08-22 |
NL7314679A (it) | 1974-05-06 |
ATA923473A (de) | 1979-02-15 |
JPS5122955B2 (it) | 1976-07-13 |
GB1434807A (en) | 1976-05-05 |
DE2353694B2 (de) | 1977-05-18 |
DE2353694A1 (de) | 1974-05-09 |
US3950470A (en) | 1976-04-13 |
JPS4997880A (it) | 1974-09-17 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
IT939317B (it) | Procedimento per la produzione di paterie plastiche poliureta niche e prodotti cosi ottenuti | |
IT970052B (it) | Procedimento perfezionato per la fabbricazione di pannelli di vi sualizzazione e pannello cosi ottenuto | |
IT979589B (it) | Procedimento per la produzione di pane lievitato e prodotti simili | |
IT999716B (it) | Procedimento per la fabbricazione di pannelli agglomerati e prodotti che ne risultano | |
IT963003B (it) | Procedimento per la reticolazione di poliolefine e prodotti ottenuti | |
IT1008611B (it) | Procedimento per la produzione di cicloalcanoni e o cicloalcanoli e prodotto ottenuto | |
IT945383B (it) | Procedimento per la preparazione di polilattoni e prodotto ottenuto | |
IT1026165B (it) | Procedimento per la fabricazione di strutture di acciaio laminato e prodotto ottemuto | |
IT1048964B (it) | Procedimento per la produzione di prodotti alimentari e bevande | |
IT1044179B (it) | Procedimento per la produzione di cellule di lievito e oppure prodotti di fermentazione | |
IT962294B (it) | Procedimento per la produzione di urea e prodotto relativ | |
IT939040B (it) | Procedimento per la fabbricazione di prodotti ceramici | |
IT967850B (it) | Procedimento per la preparazione di prodotti espansi | |
IT939458B (it) | Procedimento per la produzione di dispositivi riflettori per autovetture e prodotto ottenuto | |
IT945692B (it) | Procedimento per la produzione di poliesteri e prodotto ottenuto | |
IT965261B (it) | Prodotti di condensazione fosfora ti e procedimento per la loro produzione ed applicazione | |
IT965268B (it) | Prodotti di condensazione fosfora ti e procedimento per la loro produzione ed applicazione | |
IT958510B (it) | Procedimento per la produzione simultanea di dibromostiroli ed alchilbromuri e prodotti ottenuti | |
IT1048993B (it) | Procedimento per la fabbricazione di prodotti di carne ristrutturata | |
IT972347B (it) | Prodotti di condensazione fosforati e procedimento per la loro produzio ne ed applicazione | |
IT985297B (it) | Procedimento per la fabbricazio ne di pannelli termicamente iso lanti e prodotto ottenuto | |
IT972811B (it) | Procedimento ed impianto per la preparazione di pannelli mobili tati | |
IT988136B (it) | Procedimento per la produzione di m e p fenilendiammina | |
IT972603B (it) | Procedimento per la preparazione di prodotti di poliaddizione | |
IT951996B (it) | Processo per la fabbricazione di polimeri vinilclorurici e relativi prodotti |