Process and apparatus for producing a moisture-permeable film

Details Process and apparatus for producing a moisture-permeable film Process and apparatus for producing a moisture-permeable film

1979-02-12

1981-02-03

Anderson, Philip

Plastic and nonmetallic article shaping or treating: processes

With severing, removing material from preform mechanically,...

Making hole or aperture in article

264156, 264230, 264287, 264DIG71, 425290, 4253021, 425343, 425363, 425DIG37, B29C 1708

Patent

active

042488222

ABSTRACT:
In the manufacture of a moisture-permeable covering film for absorbent material a thermoplastic film is provided with capillary-like protrusions by embossing, after which openings are produced in the ends of said protrusions. Embossing is effected with simultaneous cooling of the film, so that the ends of the protrusions are oriented in the thermo-elastic temperature range. By a renewed heating of the ends of the protrusions the openings are formed by shrinking, which also causes the edges of the openings to be thickened.
The apparatus consists of an engraved metal cylinder and a counter-roller for the embossing step and of a heated roller, which is pressed against the ends of the embossed protrusions on the metal cylinder.

REFERENCES:
patent: 3012918 (1961-12-01), Schaar
patent: 3092439 (1963-06-01), Harrison
patent: 3132985 (1964-05-01), Moore
patent: 3146283 (1964-08-01), Da Valle
patent: 3356562 (1967-12-01), Graham et al.
patent: 3384696 (1968-05-01), Makansi
patent: 3673839 (1972-07-01), Nielsen et al.

Affiliated with

Also associated with

Rating

Process and apparatus for producing a moisture-permeable film does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process and apparatus for producing a moisture-permeable film, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process and apparatus for producing a moisture-permeable film will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-550620