GB851727A - Transparent films from linear propylene high-polymers - Google Patents
Transparent films from linear propylene high-polymersInfo
- Publication number
- GB851727A GB851727A GB15743/57A GB1574357A GB851727A GB 851727 A GB851727 A GB 851727A GB 15743/57 A GB15743/57 A GB 15743/57A GB 1574357 A GB1574357 A GB 1574357A GB 851727 A GB851727 A GB 851727A
- Authority
- GB
- United Kingdom
- Prior art keywords
- film
- polymers
- extruding
- propylene
- molecular weight
- 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
- 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
- B29D7/00—Producing flat articles, e.g. films or sheets
- B29D7/01—Films or sheets
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
Films which have a transparency of at least 95%, i.e. they are capable of transmitting 95% of normally incident white light without scattering, are made by extruding a molten linear high molecular weight crystallisable polymer of propylene, alone or in admixture with a linear high molecular weight amorphous or block polymer of propylene, to form a film, and immediately quenching the film in a cooling fluid having a temperature of not more than 80 DEG C. By blockpolymers are meant polymers which consist of macromolecular isotactic and non-isotactic segments and are soluble in heptane and insoluble in ether. The quenching fluid is preferably water and the film is obtained by conventional means, e.g. by extruding the fused mass through a die plate and passing the film between a pair of rollers immersed in water. Specification 835,038 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT851727X | 1956-05-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB851727A true GB851727A (en) | 1960-10-19 |
Family
ID=11326984
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB15743/57A Expired GB851727A (en) | 1956-05-23 | 1957-05-17 | Transparent films from linear propylene high-polymers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB851727A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3223764A (en) * | 1961-11-28 | 1965-12-14 | Nat Distillers Chem Corp | Process for production of biaxially oriented polypropylene film |
| US3376244A (en) * | 1964-10-30 | 1968-04-02 | Chevron Res | Polypropylene wax film |
-
1957
- 1957-05-17 GB GB15743/57A patent/GB851727A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3223764A (en) * | 1961-11-28 | 1965-12-14 | Nat Distillers Chem Corp | Process for production of biaxially oriented polypropylene film |
| US3376244A (en) * | 1964-10-30 | 1968-04-02 | Chevron Res | Polypropylene wax film |
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