Method of preparation of a coated abrasive belt with an endless, seamless backing
First Claim
1. A method for preparing a coated abrasive belt comprising an endless, seamless backing;
- said method comprising the steps of;
(a) providing a support structure having an outer periphery;
(b) preparing a loop of liquid organic polymeric binder material having nonmetallic fibrous reinforcing material engulfed therein, in extension around the outer periphery of the support structure, comprising winding at least two fibrous reinforcing strands of at least two different nonmetallic compositions around the outer periphery of the support structure;
(c) solidifying the liquid organic polymeric binder material to form a flexible, solidified, endless, seamless backing loop having fibrous reinforcing material engulfed therein, and an outer and an inner surface;
(d) laminating a preformed sheet material, having abrasive material coated thereon, onto the outer surface of the endless, seamless backing loop having reinforcing material therein; and
(e) removing the laminated backing loop from the support structure.
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Accused Products
Abstract
A coated abrasive backing consisting of an endless, seamless, loop is provided. The backing loop includes about 40-99% by weight of an organic polymeric binder, based upon the weight of the backing; and an effective amount of a fibrous reinforcing material engulfed within the organic polymeric binder material. The endless, seamless backing loop includes a length with parallel side edges, and at least one layer of fibrous reinforcing material engulfed within the organic polymeric binder material such that there are regions of organic binder material free of fibrous reinforcing material on opposite surfaces of the layer of fibrous reinforcing material. The fibrous reinforcing material can be in the form of individual fibrous strands, a fibrous mat structure, or a combination of the these. A method for preparing the endless, seamless backing loop for a coated abrasive belt is also provided. The method includes the steps of preparing a loop of liquid binder material having fibrous reinforcing material therein around the periphery of a drum; and solidifying the binder material such that an endless, seamless, backing loop having fibrous reinforcing material engulfed within the organic polymeric binder material is formed.
317 Citations
26 Claims
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1. A method for preparing a coated abrasive belt comprising an endless, seamless backing;
- said method comprising the steps of;
(a) providing a support structure having an outer periphery; (b) preparing a loop of liquid organic polymeric binder material having nonmetallic fibrous reinforcing material engulfed therein, in extension around the outer periphery of the support structure, comprising winding at least two fibrous reinforcing strands of at least two different nonmetallic compositions around the outer periphery of the support structure; (c) solidifying the liquid organic polymeric binder material to form a flexible, solidified, endless, seamless backing loop having fibrous reinforcing material engulfed therein, and an outer and an inner surface; (d) laminating a preformed sheet material, having abrasive material coated thereon, onto the outer surface of the endless, seamless backing loop having reinforcing material therein; and (e) removing the laminated backing loop from the support structure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
- said method comprising the steps of;
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20. A method for preparing a coated abrasive article;
- said method comprising the steps of;
(a) providing a collapsible drum having an outer periphery; (b) preparing a loop of liquid organic binder material having fibrous reinforcing material engulfed therein, in extension around the outer periphery of the collapsible drum, said preparing step comprising the substeps of; (i) saturating a fibrous reinforcing mat structure with liquid organic thermosetting binder material prior to being applied around said periphery of said drum; and (ii) winding one or more individual fibrous reinforcing strands around said fibrous reinforcing mat structure on the outer periphery of said drum in the form of a helix extending longitudinally in one or more layers that spans the width of said loop; (c) solidifying said liquid organic thermosetting binder material to form a flexible, solidified, endless, seamless backing loop having fibrous reinforcing material engulfed therein, and an outer and an inner surface having a thickness of about 0.07-1.5 mm; (d) laminating a preformed sheet material, having abrasive material coated thereon, onto the outer surface of said endless, seamless loop having reinforcing material therein; and (e) removing the laminated backing loop from the drum. - View Dependent Claims (21, 22, 23, 24, 25, 26)
- said method comprising the steps of;
Specification