Felt for forming fiber cement articles and related methods
View Patent ↗A fiber cement felt includes: a base fabric layer including MD and CMD yarns interwoven with each other, wherein the CMD yarns comprise twisted monofilaments; and at least one batt layer overlying the base fabric layer.
1. A fiber cement felt comprising:
a base fabric layer including MD and CMD yarns interwoven with each other, wherein the CMD yarns comprise twisted monofilaments substantially free of spunbond material, and wherein the MD yarns comprise spunbond-multifilament hybrid yarns; and
at least one batt layer overlying the base fabric layer.
2. The fiber cement felt defined in claim 1 , wherein the MD yarns and CMD yarns are interwoven in a plain weave pattern.
3. The fiber cement felt defined in claim 1 , wherein the twisted monofilaments have a structure selected from the group consisting of: 0.3×2×3; 0.3×2×4; 0.3×3×3; 0.2×3×4; and 0.2×3×5.
4. The fiber cement felt defined in claim 1 , wherein the CMD yarns have a size of between about 200 and 800 tex.
5. A method of forming a fiber cement article, comprising the steps of:
(a) providing a fiber cement felt, the fiber cement felt comprising:
a base fabric layer including MD and CMD yarns interwoven with each other, wherein the CMD yarns comprise twisted monofilaments substantially free of spunbond material, and wherein the MD yarns comprise spunbond-multifilament hybrid yarns; and
at least one batt layer overlying the base fabric layer;
(b) positioning the fiber cement felt on a series of support rolls of a fiber cement forming machine;
(c) depositing a fiber cement slurry on the fiber cement felt; and
(d) removing moisture from the slurry to form a fiber cement web.
6. The method defined in claim 5 , wherein the MD yarns and CMD yarns are interwoven in a plain weave pattern.
7. The method defined in claim 5 , wherein the twisted monofilaments have a structure selected from the group consisting of: 0.3×2×3; 0.3×2×4; 0.3×3×3; 0.2×3×4; and 0.2×3×5.
8. The method defined in claim 5 , wherein the CMD yarns have a size of between about 200 and 800 tex.
9. The method defined in claim 5 , wherein the fiber cement web includes indentations imparted by the fiber cement felt.
10. A fiber cement felt comprising:
a base fabric layer including MD and CMD yarns interwoven with each other, wherein the CMD yarns comprise twisted monofilaments having a size of between about 200 and 800 tex substantially free of spunbond material, and wherein the MD yarns comprise spunbond-multifilament hybrid yarns and have a size of between about 1000 and 5000 tex; and
at least one batt layer overlying the base fabric layer.