US3753825A - Process for the production of sheets of cellulose nitrate or cellulose acetate - Google Patents
Process for the production of sheets of cellulose nitrate or cellulose acetate Download PDFInfo
- Publication number
- US3753825A US3753825A US00006402A US3753825DA US3753825A US 3753825 A US3753825 A US 3753825A US 00006402 A US00006402 A US 00006402A US 3753825D A US3753825D A US 3753825DA US 3753825 A US3753825 A US 3753825A
- Authority
- US
- United States
- Prior art keywords
- cellulose acetate
- plate
- sheet
- transparent
- blue
- 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.)
- Expired - Lifetime
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D12/00—Producing frames
- B29D12/02—Spectacle frames
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
- Y10T428/266—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension of base or substrate
Definitions
- Sheets or strips of Celluloid or cellulose acetate are used for the manufacture of spectacle frames, combs, filter plates, scales (graduated elements), templates, or other articles.
- These semifinished products are employed in one color, namely transparent or opaque or in covered colors, as well as twoor multicolored arrangements. They can be in the form of socalled inlays (embeddings), for example, Havana or agate, and as twoand multiple-layered laminations.
- the sheets have been produced in accordance with the block method, wherein a solventcontaining plastic (synthetic polymeric material) mass is boiled into blocks under pressure at an elevated temperature. Inlays are obtained by inserting colored components in the strip or cube-shaped plastic, boiled mass, in accordance with specific empirical values, and compressing the composite at an elevated temperature. This procedure is repeated twice to three times, depending upon the pattern.
- a solventcontaining plastic synthetic polymeric material
- the individual sheets are glued to one another in a partially or completely desiccated condition, with the aid of solvents.
- An object of the present invention is to avoid the prior art disadvantages in producing sheets of Celluloid or cellulose acetate.
- Another object of the present invention is to provide a process for producing sheets of cellulose acetate and cellulose nitrate with differently colored zones which are sharply defined, true in size, reproducible, of flawless quality and inexpensive to produce.
- the sheet surface is treated with an application of color (ink), by means of a printing process, for example a screen-printing process
- a printing process for example a screen-printing process
- the coloring material contains as a binder, the same cellulose nitrate or acetate of which the sheet has been produced.
- the sheet is made with the use of solvents which exhibit good solubility properties with respect to the material to be printed.
- inks and of the present invention By means of inks and of the present invention, well drying and laminatable prints can be obtained, whereas the silk-screen printing inks, which are available commercially and which are produced with polyvinyl compounds, cannot be utilized due to plasticizer migration (seeping). Thus, the printed'on ink becomes smeary and during the subsequent laminating procedure there is no or very little adhesion in the printing zone.
- the printing inks of the present invention can contain a variety of pigments, either individually or in combination.
- Exemplary of the printing inks which can be used in the present invention included a composition containing about 10 cellulose acetate, about 40% acetone,
- a protective plate of desired thickness is generally laminated to the sheet in the press.
- the otherwise customary laminating method that is, operating with solvents, cannot be utilized, since the print will become partially dissolved and smear.
- a so-called adhesive film having a high plasticizer content as it is used in some cases for the lamination of cellulose acetate plates, a sharply contored print is retained, which print is protected by the eminently adhering protecting film laminated thereon.
- the plates thus withstand the customary processing stresses, such as stamping (punching), bending, and milling.
- Exemplary of the adhesive films which can be used in the present invention include a composition comprising about 50-60% cellulose acetate and about 40-50% of plasticizer mixture of phthalic acid ester and phosphoric acid ester.
- triangular or rectangular zones 1 are printed on a 5 mm thick blue-transparent plate of optical cellulose acetate, in a conventional manner by means of the silk-screen printing process.
- a screen-printing ink colored with blue pigments and containing cellulose acetate is employed.
- an adhesive film having a thickness of about 0.1 mm, as well as a blue-transparent cellulose acetate plate having a thickness of about 0.9 mm. are placed thereon.
- the bonding by lamination is conducted at temperature of about 140 170C., preferably about 160C, and under a pressure of 30 atmosphere gauge in a multilayer plate press. From the plate, the spectacle frames 2 or also other configurations can then be stamped out.
- a wet mix i.e. containing volatile solvent
- a wet mix is prepared by mixing cellulose acetate flake, plasticisers, and solvents in a kneader of the Werner-Pfleiderer type. Colourants may be added at this stage.
- a typical formulation for a clear sheet is as follows:
- the extremely viscous mixture is filtered by being forced under high pressure through filtering screens.
- This operation is performed by a stuffing press, which consists basically of a cylinder to contain the viscous mass and a hydraulically-actuated ram to apply pressure,
- the composition passes to a pair of warm mixing-rolls, on which rolling is carried out until the solvent content is reduced to about 10 percent.
- the solvent vapour removed during this operation is ducted away for recovery.
- the mass When the mass has reached this stage, it is cut off the rolls as a hide about 1 in. thick. This hide is laid on a thick steel base-plate which is usually grooved or otherwise indented to enable the plastic to make a good key" on to the plate during the pressing operation.
- a block 56 in. thick and about 52 in. long by 22 in. wide is inserted into a hydraulic press, a polished steel plate, placed upon the top of the block, and a pressure of about 1 ton/in. applied, while maintaining the platens at a temperature of about 95C. Heating under pressure is continued for several hours, and the press is then cooled, still holding the pressure. Complete cooling of the block is very important, and may require 6 h or more in the press.
- the block is next transferred to an automatic slicingmachine, being held on the bed of the machine by means of the base-plate which has become firmly welded to the block during the pressing operation.
- the height of the knife of the slicing machine is set at the start of the slicing operation and descends automatically for a predetermined distance after each cut, thus producing sheets of substantially the same thickness.
- the sheets produced in this manner still contain an appreciable amount of volatile solvent, which is removed by storing them in warm seasoning-rooms.
- the final operation is that of polishing to remove the knife marks.
- the sheets are placed between highly polished nickel plates, and pressed in a hydraulic press at about C. under a pressure of 1 ton/inf. After applying pressure for a few minutes, the press is cooled, still under pressure.
- Multi-daylight presses are normally used, enabling a number of sheets to be treated at the same time. If desired, matt or embossed surfaces can be produced by this operation. When cold, the sheets are removed from the press and passed to storage.
- Variegated colour effects can be produced by forming a block with alternate hides of different colours. After slicing, the sheets are trimmed to size, restacked on end in the desired arrangement, and rewelded into a new block, from which multicolour sheets may subsequently be sliced.
- a process for the production of plates of cellulose acetate having sharply defined differently colored zones which comprises producing a thick bluetransparent plate of optical cellulose acetate; treating desired zones of said plate with a printing ink colored with blue pigments containing cellulose acetate as a binder therefor, a solvent for cellulose acetate, and a small amount of a plasticizer for cellulose acetate; drying the treated plate; placing a thin adhesive film consisting essentially of 50 to 60 percent by weight of cellulose acetate and 40 to 50 percent by weight of a plasticizer for said cellulose acetate thereon; applying a blue-transparent cellulose acetate plate having a thickness substantially less than that of the printing plate to said adhesive film to thereby form a composite plate product; and bonding said composite product at a temperature of about 140 to 170C. and at a pressure of product is bonded at a temperature of about 160C.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19691905293 DE1905293A1 (de) | 1969-02-04 | 1969-02-04 | Verfahren zur Herstellung von Platten aus Celluloid oder Celluloseacetat |
Publications (1)
Publication Number | Publication Date |
---|---|
US3753825A true US3753825A (en) | 1973-08-21 |
Family
ID=5724195
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00006402A Expired - Lifetime US3753825A (en) | 1969-02-04 | 1970-01-28 | Process for the production of sheets of cellulose nitrate or cellulose acetate |
Country Status (3)
Country | Link |
---|---|
US (1) | US3753825A (de) |
DE (1) | DE1905293A1 (de) |
FR (1) | FR2032711A5 (de) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5895693A (en) * | 1996-04-11 | 1999-04-20 | Linda Sundlin | Decorative products made from film strips and a method of making such products |
US20070254140A1 (en) * | 2006-04-30 | 2007-11-01 | Okia Optical Co., Ltd. | Laminate for eyeglass frame with embedded design pattern and manufacturing method thereof |
US20090174860A1 (en) * | 2006-09-07 | 2009-07-09 | Okia Optical Company, Ltd. | Eyeglass frame with embedded design pattern and manufacturing method thereof |
CN104441713A (zh) * | 2013-09-25 | 2015-03-25 | 玛珠舍利1849股份公司 | 具有混色的基于纤维素乙酸酯的产品的制造方法以及用该方法获得的例如眼镜等产品 |
EP2758829B1 (de) | 2011-09-21 | 2016-03-23 | OKIA Optical Co. Ltd. | Verfahren zur herstellung von brillengestellen durch spritzgiessen |
US9594256B2 (en) | 2012-08-24 | 2017-03-14 | Okia Optical Co., Ltd. | Thermoplastic laminate, decorative part for eyewear and process of preparation thereof |
WO2024012892A1 (en) * | 2022-07-15 | 2024-01-18 | Luxottica S.R.L. | Frame for eyeglasses and method for providing the frame |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3835722A1 (de) * | 1988-10-20 | 1990-04-26 | Niggel & Schuler | Verfahren und vorrichtung zur fertigung von kunststoffbuegelenden und kunststoffbuegelende fuer metallbrillen |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB479508A (en) * | 1935-05-02 | 1938-02-07 | Celluloid Corp | Improvements in or relating to artificial thermoplastic materials |
GB851489A (en) * | 1957-07-23 | 1960-10-19 | Marley Tile Co Ltd | Improvements relating to deco rative laminated sheet materials |
US3255695A (en) * | 1963-10-16 | 1966-06-14 | Markem Machine Co | Method of printing and apparatus therefor |
US3389029A (en) * | 1964-06-23 | 1968-06-18 | Black Box Collotype Studios In | Method of making transparency |
US3470054A (en) * | 1965-03-15 | 1969-09-30 | John J Tyrrell | Method of process color printing with water-base inks |
US3472802A (en) * | 1966-11-23 | 1969-10-14 | Inter Chem Corp | Novel nitrocellulose flexographic printing inks |
-
1969
- 1969-02-04 DE DE19691905293 patent/DE1905293A1/de active Pending
-
1970
- 1970-01-28 US US00006402A patent/US3753825A/en not_active Expired - Lifetime
- 1970-02-03 FR FR7003787A patent/FR2032711A5/fr not_active Expired
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB479508A (en) * | 1935-05-02 | 1938-02-07 | Celluloid Corp | Improvements in or relating to artificial thermoplastic materials |
GB851489A (en) * | 1957-07-23 | 1960-10-19 | Marley Tile Co Ltd | Improvements relating to deco rative laminated sheet materials |
US3255695A (en) * | 1963-10-16 | 1966-06-14 | Markem Machine Co | Method of printing and apparatus therefor |
US3389029A (en) * | 1964-06-23 | 1968-06-18 | Black Box Collotype Studios In | Method of making transparency |
US3470054A (en) * | 1965-03-15 | 1969-09-30 | John J Tyrrell | Method of process color printing with water-base inks |
US3472802A (en) * | 1966-11-23 | 1969-10-14 | Inter Chem Corp | Novel nitrocellulose flexographic printing inks |
Non-Patent Citations (1)
Title |
---|
Yarsley et al., Cellulose Plastics , pp. 97, 98, 206 and 207, ILIFFE Books Ltd. (1964), London, copied in Sci. Lib.: TP 986 A2 436. * |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5895693A (en) * | 1996-04-11 | 1999-04-20 | Linda Sundlin | Decorative products made from film strips and a method of making such products |
US20070254140A1 (en) * | 2006-04-30 | 2007-11-01 | Okia Optical Co., Ltd. | Laminate for eyeglass frame with embedded design pattern and manufacturing method thereof |
US20100314034A1 (en) * | 2006-04-30 | 2010-12-16 | Okia Optical Co., Ltd. | Laminate for eyeglass frame with embedded design pattern and manufacturing method thereof |
US20090174860A1 (en) * | 2006-09-07 | 2009-07-09 | Okia Optical Company, Ltd. | Eyeglass frame with embedded design pattern and manufacturing method thereof |
US8652385B2 (en) | 2006-09-07 | 2014-02-18 | Okia Optical Company Ltd. | Method of manufacturing a decorative article with sealed decorative laminated sheet |
EP2758829B1 (de) | 2011-09-21 | 2016-03-23 | OKIA Optical Co. Ltd. | Verfahren zur herstellung von brillengestellen durch spritzgiessen |
US9594256B2 (en) | 2012-08-24 | 2017-03-14 | Okia Optical Co., Ltd. | Thermoplastic laminate, decorative part for eyewear and process of preparation thereof |
US10401644B2 (en) | 2012-08-24 | 2019-09-03 | Okia Optical Co., Ltd. | Thermoplastic laminate, decorative part for eyewear and process of preparation thereof |
CN104441713A (zh) * | 2013-09-25 | 2015-03-25 | 玛珠舍利1849股份公司 | 具有混色的基于纤维素乙酸酯的产品的制造方法以及用该方法获得的例如眼镜等产品 |
US20150085242A1 (en) * | 2013-09-25 | 2015-03-26 | Mazzucchelli 1849 S.P.A. | Manufacturing process of a product based on cellulose acetate with blended colour, and product, such as spectacles, obtained by such process |
US9776345B2 (en) * | 2013-09-25 | 2017-10-03 | Mazzucchelli 1849 S.P.A. | Manufacturing process of a product based on cellulose acetate with blended colour |
WO2024012892A1 (en) * | 2022-07-15 | 2024-01-18 | Luxottica S.R.L. | Frame for eyeglasses and method for providing the frame |
Also Published As
Publication number | Publication date |
---|---|
DE1905293A1 (de) | 1970-08-06 |
FR2032711A5 (de) | 1970-11-27 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4938830A (en) | Plastic card and method of fabrication thereof | |
US4354851A (en) | Method for making a decorated, water-resistant, rigid panel and the product made thereby: transfer dye process onto rigid panel | |
DE2205095C3 (de) | Schichtkörper und Verfahren zu seiner Herstellung | |
DE69916242T2 (de) | Verfahren zum Herstellen einer Plastikkarte mit einem Linsenraster und die hergestellte Karte | |
DE69028882T3 (de) | Wärmeübertragungs-Aufzeichnungsmedium | |
US4284453A (en) | Method of imparting color highlights or shadows to a textured decorative laminate | |
US2205466A (en) | Process for making decorative material | |
KR910000733B1 (ko) | 적층유리시이트용 화장중간막의 제조방법 | |
US3753825A (en) | Process for the production of sheets of cellulose nitrate or cellulose acetate | |
GB1038785A (en) | Dry transfer sheets and processes for using the same | |
US5053260A (en) | Embossing foil | |
DE2225471B2 (de) | Undurchsichtige identifikationskarte und verfahren zu ihrer herstellung | |
US4520063A (en) | Forgery-proof flat article of a synthetic resin, and process for the production thereof | |
DE1809926A1 (de) | Verfahren zur Bildwiedergabe | |
EP0043552B1 (de) | Fälschungssicheres Ausweispapier mit thermoplastischer Abdeckfolie | |
US3748202A (en) | Process for manufacturing reprinted matter(relief printing) | |
US1742516A (en) | Ornamental molded article and method of making the same | |
DE69012344T2 (de) | Holographisches prägeverfahren. | |
EP1137546B1 (de) | Siebdruck-reflexionstransfer und verfahren zu dessen herstellung | |
US2273700A (en) | Decorated foil and film | |
EP0447788A1 (de) | Verfahren zur Übertragung eines Bildmotivs auf eine Dekorfolie | |
US3772106A (en) | Process of making tridimensional color photographs | |
US4696709A (en) | Process for production of an expanded polyolefin panel | |
US3909329A (en) | Article for applying register or index marks and method of using the same | |
EP0669214A1 (de) | Verfahren zum Aufbringen und Versiegeln von Informationen auf kartenförmigen Informationsträgern |