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US Patent 4146510 - Flake- or sliver-like porous structure of polymeric material and process of producing same, and process of producing sheet-like structure therefrom

US Patent Issued on March 27, 1979
Estimated Patent Expiration Date: Icon_subject March 27, 1996Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
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Abstract

Flake- or sliver-like porous structures of a polymeric material heavily loaded with a finely divided inorganic substance are prepared by spurting a mixture of the polymeric and finely divided inorganic components in a solvent. The products have many fine, irregular voids. The thickness of walls forming such voids is 5μ or less. The products are especially useful for producing sheet-like structures therefrom by beating and/or refining them followed by general paper making procedures. The sheets, when calendered, have a high initial modulus and improved dimensional stability.

Inventors

Assignee

Application

No. 05/609442 filed on 09/02/1975

US Classes:

521/64, Removing a liquid to form a cellular product264/45.3, Incorporating particulate material, fibers, or batts in a random distribution within a foamed body264/53, Liquid to gas phase change521/143, From acyclic mono-unsaturated hydrocarbon as only reactant521/55, Treating a cellular solid polymer by adding a material thereto which forms a composition therewith521/80Including solid polymer formation in or during extruding step

Field of Search

264/45.3, Incorporating particulate material, fibers, or batts in a random distribution within a foamed body264/53Liquid to gas phase change

Examiners

Primary: Anderson, Philip

Attorney, Agent or Firm

US Patent References

2810646, 3003304, 3210239, 3785919, 3884030, 3911070, 3912665, 3912666, 3931762, Method for preparing a plastic relief printing plate
Issued on: 01/13/1976
Inventor: Fukushima ,   et al.
4049593Inorganic substance composition and process for producing same
Issued on: 09/20/1977
Inventor: Sato ,   et al.

International Classes

C08J 9/00 (20060101)
D01D 5/11 (20060101)
D01D 5/00 (20060101)

Foreign Application Priority Data

1971-11-12 JP

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