GB1019793A - Perforating film of synthetic linear polymers - Google Patents
Perforating film of synthetic linear polymersInfo
- Publication number
- GB1019793A GB1019793A GB4564761A GB4564761A GB1019793A GB 1019793 A GB1019793 A GB 1019793A GB 4564761 A GB4564761 A GB 4564761A GB 4564761 A GB4564761 A GB 4564761A GB 1019793 A GB1019793 A GB 1019793A
- Authority
- GB
- United Kingdom
- Prior art keywords
- needles
- film
- linear polymers
- synthetic linear
- perforating
- 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
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
- B26F1/24—Perforating by needles or pins
Abstract
The tear strength of a film of e.g. polyethylene terephthalate, polypropylene, polythene, and polyvinylidene chloride is improved by perforating with hot needles to form holes covering from 5-50% of the area of the sheet. The surface of the film may be raised by shaping the points of the needles. The needles may be heated at their base or by frictional heat alone. The holes are of curvilinear shape and may be circular or oval. The perforated films may be united by fusion or with an adhesive to each other or to other fabric layers, coated with foamed polyurethane or calendered, embossed, corrugated or provided by abrasion with a matt surface.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4564761A GB1019793A (en) | 1961-12-20 | 1961-12-20 | Perforating film of synthetic linear polymers |
FR919321A FR1343957A (en) | 1961-12-20 | 1962-12-20 | A method of manufacturing a perforated sheet having high tear resistance |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4564761A GB1019793A (en) | 1961-12-20 | 1961-12-20 | Perforating film of synthetic linear polymers |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1019793A true GB1019793A (en) | 1966-02-09 |
Family
ID=26199015
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4564761A Expired GB1019793A (en) | 1961-12-20 | 1961-12-20 | Perforating film of synthetic linear polymers |
Country Status (2)
Country | Link |
---|---|
FR (1) | FR1343957A (en) |
GB (1) | GB1019793A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3407461A (en) * | 1966-11-29 | 1968-10-29 | Monsanto Co | Method for preparing nonwoven substrates |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2806402C3 (en) * | 1978-02-15 | 1980-11-27 | Unilever N.V., Rotterdam (Niederlande) | Method and device for producing a moisture-permeable film made of thermoplastic material |
-
1961
- 1961-12-20 GB GB4564761A patent/GB1019793A/en not_active Expired
-
1962
- 1962-12-20 FR FR919321A patent/FR1343957A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3407461A (en) * | 1966-11-29 | 1968-10-29 | Monsanto Co | Method for preparing nonwoven substrates |
Also Published As
Publication number | Publication date |
---|---|
FR1343957A (en) | 1963-11-22 |
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