GB1055803A - Improved thermoplastic films - Google Patents
Improved thermoplastic filmsInfo
- Publication number
- GB1055803A GB1055803A GB1462/64A GB146264A GB1055803A GB 1055803 A GB1055803 A GB 1055803A GB 1462/64 A GB1462/64 A GB 1462/64A GB 146264 A GB146264 A GB 146264A GB 1055803 A GB1055803 A GB 1055803A
- Authority
- GB
- United Kingdom
- Prior art keywords
- films
- polypropylene
- layer
- polyethylene
- stretching
- 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
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
-
- 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
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
-
- 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
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
- B29C55/023—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets using multilayered plates or sheets
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
1,055,803. Laminates. NATIONAL DISTILLERS & CHEMICAL CORPORATION. Jan. 13, 1964 [Jan. 23, 1963], No. 1462/64. Heading B5N. A method for the preparation of a heatsealable polypropylene laminate suitable for packaging comprises intimately contacting a layer of polypropylene film with at least one layer of a heat sealable thermoplastic film and subsequently stretching the resultant combination of films to bond them firmly together. Preferably the polypropylene film is first stretched in a longitudinal direction in a ratio of at least 1.2 to 1 by passing it over a series of heated rollers, a layer of polyethylene film is applied to at least one side of the longitudinally stretched polypropylene film, and the resulting combination of films is stretched at a temperature above the heat softening point of the polyethylene, e.g. 250‹ F., in a transverse direction, preferably in a tenter frame, the transverse stretch being in a ratio of at least 3:1. The films may then be subjected to a further longitudinal stretching step. However, the films may be brought into intimate contact before the initial longitudinal stretching of the base polypropylene, subsequent to the initial longitudinal stretching but prior to the transverse stretching or subsequent to the transverse stretching but prior to the second longitudinal stretching step. Simultaneous biaxial orientation may be employed. Suitable thermoplastic materials include polyethylene, polyethylene copolymers, polyallomers (defined in the Specification), polystyrene, polyvinyl chloride, polyvinylidene chloride, polyvinyl alcohol, vinylacetate-ethylene copolymers and nitrocellulose. The untreated polypropylene has a thickness of at least 0À2 mil., and the thermoplastic layer a thickness of at least 0À02 mil.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US25328663A | 1963-01-23 | 1963-01-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1055803A true GB1055803A (en) | 1967-01-18 |
Family
ID=22959634
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1462/64A Expired GB1055803A (en) | 1963-01-23 | 1964-01-13 | Improved thermoplastic films |
Country Status (8)
| Country | Link |
|---|---|
| CH (1) | CH435690A (en) |
| DE (1) | DE1294005B (en) |
| DK (1) | DK107443C (en) |
| ES (1) | ES295570A1 (en) |
| FR (1) | FR1397233A (en) |
| GB (1) | GB1055803A (en) |
| NL (1) | NL6400507A (en) |
| SE (1) | SE330083B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4920388B1 (en) * | 1970-12-30 | 1974-05-24 | ||
| JPS5265179U (en) * | 1976-04-09 | 1977-05-13 | ||
| US4235365A (en) | 1977-04-15 | 1980-11-25 | Toray Industries, Inc. | Three-layered polypropylene films |
| US4390385A (en) | 1980-05-23 | 1983-06-28 | W. R. Grace & Co., Cryovac Div. | Heat sealable, multi-ply polypropylene film |
| US4439478A (en) * | 1980-05-23 | 1984-03-27 | W. R. Grace & Co., Cryovac Division | Heat sealable, multi-ply polypropylene film |
| EP0147078A2 (en) * | 1983-12-23 | 1985-07-03 | Mobil Oil Corporation | An oriented film laminate and method of forming same |
| EP0202812A2 (en) * | 1985-05-24 | 1986-11-26 | Imperial Chemical Industries Plc | Multiple-layer polyolefin films |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5254784A (en) * | 1975-10-31 | 1977-05-04 | Toray Ind Inc | Composite film |
| DE3041286C1 (en) * | 1980-11-03 | 1982-07-22 | Hoechst Ag, 6000 Frankfurt | Sealable, biaxially stretched polypropylene film with high scratch resistance and process for its production |
| DE3408832A1 (en) * | 1984-03-10 | 1985-09-19 | Unilever N.V., Rotterdam | MULTIPLE-PIECE PACKAGING WITH SHRINK FILM COVERING |
| DE3626809A1 (en) * | 1986-06-06 | 1987-12-10 | Auch Folien Gmbh | Biaxially oriented polypropylene film - includes gas barrier and sealing layers, for packaging foodstuffs |
| DE4000495C2 (en) * | 1990-01-10 | 1994-03-03 | Spohn Verpackungswerke Gmbh & | Method and device for laminating an unstretched film with an stretched film and a multilayer film |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1134503B (en) * | 1958-05-31 | 1962-08-09 | Kalle Ag | Process for the production of multilayer polyester films |
-
1964
- 1964-01-13 GB GB1462/64A patent/GB1055803A/en not_active Expired
- 1964-01-20 DE DEN24324A patent/DE1294005B/en active Pending
- 1964-01-21 ES ES0295570A patent/ES295570A1/en not_active Expired
- 1964-01-22 CH CH73464A patent/CH435690A/en unknown
- 1964-01-22 SE SE00764/64A patent/SE330083B/xx unknown
- 1964-01-22 DK DK33264AA patent/DK107443C/en active
- 1964-01-22 FR FR961154A patent/FR1397233A/en not_active Expired
- 1964-01-23 NL NL6400507A patent/NL6400507A/xx unknown
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4920388B1 (en) * | 1970-12-30 | 1974-05-24 | ||
| JPS5265179U (en) * | 1976-04-09 | 1977-05-13 | ||
| JPS551879Y2 (en) * | 1976-04-09 | 1980-01-18 | ||
| US4235365A (en) | 1977-04-15 | 1980-11-25 | Toray Industries, Inc. | Three-layered polypropylene films |
| US4390385A (en) | 1980-05-23 | 1983-06-28 | W. R. Grace & Co., Cryovac Div. | Heat sealable, multi-ply polypropylene film |
| US4439478A (en) * | 1980-05-23 | 1984-03-27 | W. R. Grace & Co., Cryovac Division | Heat sealable, multi-ply polypropylene film |
| EP0147078A2 (en) * | 1983-12-23 | 1985-07-03 | Mobil Oil Corporation | An oriented film laminate and method of forming same |
| EP0147078A3 (en) * | 1983-12-23 | 1986-08-20 | Mobil Oil Corporation | An oriented film laminate and method of forming same |
| EP0202812A2 (en) * | 1985-05-24 | 1986-11-26 | Imperial Chemical Industries Plc | Multiple-layer polyolefin films |
| EP0202812A3 (en) * | 1985-05-24 | 1988-06-08 | Imperial Chemical Industries Plc | Multiple-layer polyolefin films |
| US4886698A (en) * | 1985-05-24 | 1989-12-12 | Imperial Chemical Industries Plc | Multiple-layer polyolefin films |
Also Published As
| Publication number | Publication date |
|---|---|
| SE330083B (en) | 1970-11-02 |
| DK107443C (en) | 1967-05-29 |
| NL6400507A (en) | 1964-07-24 |
| CH435690A (en) | 1967-05-15 |
| FR1397233A (en) | 1965-04-30 |
| ES295570A1 (en) | 1964-04-01 |
| DE1294005B (en) | 1969-04-30 |
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