Foraminous mat products
First Claim
1. A highly porous mat of agglomerated particles collected on a foraminous member by spraying a mixture of liquid and solid materials into a stream of a drying gas which is flowed through the foraminous collecting member comprising:
- a multiplicity of microscopic spheroidal particles which are initially deposited on the foraminous collecting member and are rigidly bonded together at their points of contact to form an initial bed extending substantially over the entire surface of the foraminous collecting member, having upper and lower surfaces, and a multiplicity of communicating pores and channels extending between said upper and lower surfaces and through which substantially all of said drying gas continues to flow,said initial bed acting as a filter medium to subsequently remove air entrained particles from said drying gas which removed particles are rigidly bonded at their points of contact with each other and the particles forming said initial bed to provide a porous mat having a thickness of several inches corresponding to the combined thickness of a multiplicity of said particles, andsaid resultant mat characterized by said bonded particles having a moisture content substantially less than at the time they are deposited on the foraminous collecting member or filtered from said drying gas and by having a void fraction value greater than 0.50.
1 Assignment
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Accused Products
Abstract
Spray dried products exhibiting improved dispersibility in solvent medium are obtained from a highly porous foraminous mat. The mat is comprised of a multiplicity of spheroidal dry particles bonded or fused together in an aggregate form. The fused particles of the mat are structurally arranged to provide a multiplicity of communicating pores and channels extending through the mat permitting the flow of a gas through the mat. The mat can be subdivided into pieces of the required size or reduced to a fine powder, if desired.
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Citations
33 Claims
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1. A highly porous mat of agglomerated particles collected on a foraminous member by spraying a mixture of liquid and solid materials into a stream of a drying gas which is flowed through the foraminous collecting member comprising:
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a multiplicity of microscopic spheroidal particles which are initially deposited on the foraminous collecting member and are rigidly bonded together at their points of contact to form an initial bed extending substantially over the entire surface of the foraminous collecting member, having upper and lower surfaces, and a multiplicity of communicating pores and channels extending between said upper and lower surfaces and through which substantially all of said drying gas continues to flow, said initial bed acting as a filter medium to subsequently remove air entrained particles from said drying gas which removed particles are rigidly bonded at their points of contact with each other and the particles forming said initial bed to provide a porous mat having a thickness of several inches corresponding to the combined thickness of a multiplicity of said particles, and said resultant mat characterized by said bonded particles having a moisture content substantially less than at the time they are deposited on the foraminous collecting member or filtered from said drying gas and by having a void fraction value greater than 0.50. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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Specification