Grass seed mat

Abstract

Abstract A grass seed mat for the germination and growing of grass seed when placed in contact with a soil surface consists of a sheet of polyurethane foam material with grass seeds attached to one side by means of a water-soluble glue or adhesive. In order for the mat to provide the dual functions of providing adequate moisture retention (mulching effect) and penetration of the grass shoots through the mat, achieving an optimum 90-100 percent seed germination and growth, the pore or cell size of the foam material must be in the critical range of 35 to 40 pores per lineal inch and a thickness of between 4/64 to 6/64 of an inch. Preferably, the polyurethane foam material is a reticulated, fully open pore-type wherein the pores are of substantially uniform size (as compared one to the other), with a total of approximately 97 per cent void space and a density of 1.7 to 2.3 pounds per cubic foot. Foam material having pore sizes or thicknessesabove or below this stated critical range will not produce the desired 90-100 percent germination and shoot penetration because of either inability to provide proper moisture retention, inability of the grass shoots to penetrate the mat or lifting of the mat from contact with the soil surface.

Inventors

• 👤 Donald M Swan

Bibliographic Details