Method of making coated abrasive belt with an endless, seamless backing
First Claim
1. A method for preparing a coated abrasive belt having an endless, seamless backing;
- the method comprising;
(a) preparing a loop of liquid organic polymeric binder material having fibrous reinforcing material engulfed therein, in extension around the outer periphery of a support structure;
(b) solidifying the liquid organic polymeric binder material to form a flexible, solidified, endless, seamless loop having about 70-85 wt-% solidified organic polymeric binder material with fibrous reinforcing material engulfed therein, generally parallel side edges, and inner and outer surfaces having generally no fibrous reinforcing material protruding therefrom;
(c) applying an abrasive coating to the backing loop; and
(d) removing the backing loop from the support structure.
1 Assignment
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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.
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Citations
24 Claims
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1. A method for preparing a coated abrasive belt having an endless, seamless backing;
- the method comprising;
(a) preparing a loop of liquid organic polymeric binder material having fibrous reinforcing material engulfed therein, in extension around the outer periphery of a support structure;
(b) solidifying the liquid organic polymeric binder material to form a flexible, solidified, endless, seamless loop having about 70-85 wt-% solidified organic polymeric binder material with fibrous reinforcing material engulfed therein, generally parallel side edges, and inner and outer surfaces having generally no fibrous reinforcing material protruding therefrom;
(c) applying an abrasive coating to the backing loop; and
(d) removing the backing loop from the support structure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
- the method comprising;
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13. A method for preparing a coated abrasive belt having an endless, seamless backing;
- the method comprising;
(a) preparing a loop of liquid organic polymeric binder material having fibrous reinforcing material engulfed therein, in extension around the outer periphery of a support structure;
(b) solidifying the liquid organic polymeric binder material to form a flexible, solidified, endless, seamless, loop having solidified organic polymeric binder material with fibrous reinforcing material engulfed therein, generally parallel side edges, and inner and outer surfaces having generally no fibrous reinforcing material protruding therefrom;
wherein the liquid organic polymeric binder material is a thermosetting resin selected from the group consisting of phenolic resins, amino resins, polyester resins, aminoplast resins, urethane resins, melamine-formaldehyde resins, epoxy resins, acrylated isocyanurate resins, urea-formaldehyde resins, isocyanurate resins, acrylated urethane resins, acrylated epoxy resins and mixtures thereof;
(c) applying an abrasive coating to the backing loop; and
(d) removing the backing loop from the support structure. - View Dependent Claims (14, 15, 16, 17, 18, 19)
(a) applying a fibrous mat structure around the outer periphery of the support structure; and
(b) winding one or more fibrous reinforcing strands around the outer periphery of the support structure;
wherein the fibrous stands and fibrous mat structure form distinct noninterlocking layers.
- the method comprising;
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15. The method of claim 14 wherein the fibrous reinforcing mat structure is coated with the liquid organic polymeric binder material prior to being applied around the outer periphery of the support structure.
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16. The method of claim 13 wherein the step of applying an abrasive coating comprises:
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(a) applying a first adhesive layer to the outer surface of the flexible endless, seamless backing loop;
(b) applying abrasive material onto the first adhesive layer; and
(c) at least partially solidifying the first adhesive layer.
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17. The method of claim 16 wherein the abrasive material is applied electrostatically.
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18. The method of claim 16 wherein the step of applying an abrasive coating further includes:
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(a) applying a second adhesive layer over the abrasive material and first adhesive layer; and
(b) completely solidifying both the first and second adhesive layers.
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19. The method of claim 13 wherein step (d) is carried out before step (c).
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20. A method for preparing a coated abrasive belt having an endless, seamless backing;
- the method comprising;
(a) preparing a loop of liquid organic polymeric binder material having fibrous reinforcing material engulfed therein, in extension around the outer periphery of a collapsible drum;
(b) solidifying the liquid organic polymeric binder material to form a flexible, solidified, endless, seamless loop having solidified organic polymeric binder material with fibrous reinforcing material engulfed therein, generally parallel side edges, and inner and outer surfaces having generally no fibrous reinforcing material protruding therefrom;
(c) applying an abrasive coating to the backing loop; and
(d) removing the backing loop from the collapsible drum. - View Dependent Claims (21, 22, 23, 24)
- the method comprising;
Specification