Resin composition for producing a film and method for producing a film by using the same
US5254617A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 17, 1991 |
| Grant date | Oct 19, 1993 |
| Priority date | — |
| Expiry date | Jun 17, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31913
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A resin composition for producing a film is provided. The composition comprises (A) a high-density polyethylene having predetermined melt flow rate, density and melt tension, (B) a propylene-based polymer having predetermined melt flow rate, (C) talc, (D) CaO and/or MgO, and (E) a surface active agent. The resin compositions is readily formable into a film having excellent strength and water resistance as well as paper-like texture and rigidity. A method for producing a film by blown-film extrusion from such a resin composition is also provided. In this method, both ratio of diameter of the resulting bubble to minimum diameter of the bubble and ratio of length in machine direction of the bubble with predetermined diameter to the die diameter are adjusted to fall within predetermined ranges.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.