US20170203407A1

US20170203407A1 - Back pad capable of color rendering end-of-life and manufacturing method thereof

Info

Publication number: US20170203407A1
Application number: US15/149,965
Authority: US
Inventors: Chung-Chih Feng; I-Peng Yao; Lyang-Gung Wang; Hsin-Ru Song
Original assignee: San Fang Chemical Industry Co Ltd
Current assignee: San Fang Chemical Industry Co Ltd
Priority date: 2016-01-20
Filing date: 2016-05-09
Publication date: 2017-07-20
Also published as: TW201726314A; TWI571356B

Abstract

A back pad capable of color rendering end-of-life includes an absorption layer, a dye capsule layer and a carrier layer. The absorption layer has a surface. The dye capsule layer is disposed on the surface of the absorption layer. The carrier layer is laminated onto the dye capsule layer. The dye capsule layer of the present disclosure can be dissolved to release dyes after water penetrates in the back pad, and the end-of-life of the back pad can be easily determined through a color-rendering effect of the dyes.

Description

FIELD

The disclosure relates to a back pad and manufacturing method thereof, more particular to a back pad capable of color rendering end-of-life and manufacturing method thereof.

BACKGROUND

Referring to FIG. 1, which shows a schematic view of a grinding device having a conventional back pad disclosed by U.S. Pat. No. 5,871,393. The grinding device 10 includes a lower base plate 11, a back pad 12, a workpiece 13, an upper base plate 14, a polishing pad 15, and a grinding slurry 16. The lower base plate 11 is opposite to the upper base plate 14. The back pad 12 is disposed on the lower base plate 11, and the back pad 12 is used for bearing and fixing the workpiece 13. The polishing pad 15 is fixed onto the upper base plate 14, faced with the lower base plate 11, and is used for polishing the workpiece 13.
The operation mode of the grinding device 10 is as follows. First, the workpiece 13 is placed on the back pad 12, and the workpiece 13 is absorbed by the back pad 12. Then, the upper base plate 14 and the lower base plate 11 are rotated in opposite directions, and meanwhile the upper base plate 14 is moved downwards, so that the polishing pad 15 is in contact with a surface of the workpiece 13; and the workpiece 13 can be polished by continuously supplementing the grinding slurry 16 and under the function of the polishing pad 15.
However, the back pad 12, after being used for a long time, may be faced with the situation in which water penetrates in the sheet and therefore causes damage to siphonage, so that an adsorption force between the workpiece 13 and the back pad 12 deteriorates, further causing that the workpiece 13 cannot be polished to be flat or may even fall into fall into pieces. The occurrence of the foregoing water penetration is indicative of that the back pad 12 reaches the end-of-life and must be changed.
However, because it is impossible to accurately acquire a first time when the water penetration occurs, it is also impossible to immediately change the back pad 12 at the first time when the water penetration occurs, causing that a great amount of the workpieces 13 are wasted due to poor polishing or crushing. Hence, waste of the workpieces 13 can be avoided if the first time when the water penetration occurs (that is, the end-of-life of the back pad 12) is accurately determined and the back pad 12 is immediately changed.
Based on the foregoing analysis, it is necessary to provide a back pad capable of color rendering end-of-life and manufacturing method thereof, so as to solve the foregoing deficiencies in the prior art.

SUMMARY OF THE INVENTION

In accordance with one aspect of the present disclosure, a back pad is capable of color rendering end-of-life includes an absorption layer, a dye capsule layer and a carrier layer. The absorption layer has a surface. The dye capsule layer is disposed on the surface of the absorption layer. The carrier layer is laminated onto the dye capsule layer.
In accordance with another aspect of the present disclosure, a manufacturing method for a back pad capable of color rendering end-of-life includes step in which an absorption layer is provided, wherein the absorption layer has a surface. The method continues with step in which a dye capsule layer is formed on the surface of the absorption layer. The method continues with step in which a carrier layer is laminated onto the dye capsule layer.
The dye capsule layer of the present disclosure can be dissolved to release dyes after water penetrates in the back pad, and the end-of-life of the back pad can be easily determined through a color-rendering effect of the dyes.

BRIEF DESCRIPTION OF THE DRAWINGS

Aspects of the present disclosure are understood from the following detailed description when read with the accompanying figures. It is emphasized that, in accordance with the standard practice in the industry, various features are not drawn to scale. In fact, the dimensions of the various features may be arbitrarily increased or reduced for clarity of discussion.

FIG. 1 shows a schematic view of a grinding device having a conventional back pad disclosed by U.S. Pat. No. 5,871,393.

FIG. 2 shows a schematic structural view of a back pad capable of color rendering end-of-life according to the present disclosure.

FIG. 3 shows a schematic structural view of a dye micro-capsule according to the present disclosure.

FIG. 4 shows a schematic structural view of a back pad according to another embodiment of the present disclosure.

FIG. 5 shows a schematic view of color rendering of a back pad capable is of color rendering end-of-life in water penetration according to the present disclosure.

FIG. 6 is a flow diagram of a manufacturing method for a back pad capable of color rendering end-of-life according to the present disclosure.

FIG. 7A shows a schematic view of an absorption layer in the manufacturing method according to the present disclosure.

FIG. 7B shows a schematic view of forming a dye capsule layer on a surface of an absorption layer according to the manufacturing method of the present disclosure.

FIG. 7C shows a schematic view of laminating a carrier layer onto a dye capsule layer according to the manufacturing method of the present disclosure.

DETAILED DESCRIPTION OF THE INVENTION

It is to be understood that the following disclosure provides many different embodiments or examples, for implementing different features of various embodiments. Specific examples of components and arrangements are described below to simplify the present disclosure. The present disclosure may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein; rather, these embodiments are provided so that this description will be thorough and complete, and will fully convey the present disclosure to those of ordinary skill in the art. It will be apparent, however, that one or more embodiments may be practiced without these specific details.
In addition, the present disclosure may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed.
It will be understood that singular forms “a”, “an” and “the” are intended is to include the plural forms as well, unless the context clearly indicates otherwise.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms; such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present disclosure, and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
FIG. 2 shows a schematic structural view of a back pad capable of color rendering end-of-life according to the present disclosure.
Referring to FIG. 2, a back pad 20 capable of color rendering end-of-life includes an absorption layer 21, a dye capsule layer 22 and a carrier layer 23.
In this embodiment, the absorption layer 21 is a polyurethane (PU) film, and the absorption layer 21 has a surface 21S.
The dye capsule layer 22 is disposed on the surface 21S of the absorption layer 21, and the dye capsule layer 22 includes at least one dye micro-capsule 221. In this embodiment, the dye capsule layer 22 includes a plurality of dye micro-capsules 221.
FIG. 3 shows a schematic structural view of a dye micro-capsule according to the present disclosure.
Referring to FIG. 3, the dye micro-capsule 221 includes a soluble capsule body 221C and a dye 221D. The dye 221D is disposed in the soluble capsule body 221C. In this embodiment, the soluble capsule body 221C can be dissolved with io water and then releases the dye 221D, so as to achieve a color-rendering effect.
Referring to FIG. 2 and FIG. 3 again, in order to maintain a bonding strength between the carrier layer 23 and the absorption layer 21 and the structural strength of the back pad 20 capable of color rendering end-of-life, the thickness of the dye capsule layer 22 should not be excessively thin or excessively thick. Preferably, a thickness of the dye capsule layer 22 should be controlled in a range of 10 μm to 1000 μm inclusive, and the thickness of the dye capsule layer 22 should be less than a thickness of the absorption layer 21 and less than a thickness of the carrier layer 23.
In addition, to successfully control the thickness of the dye capsule layer 22 in a range of 10 μm to 1000 μm inclusive, preferably, a length of the dye micro-capsule 221 should be controlled in a range of 10 μm to 100 μm inclusive.
The carrier layer 23 is laminated onto the dye capsule layer 22. In this embodiment, the carrier layer 23 is a gum film, and the gum film can be directly laminated onto the dye capsule layer 22. In addition, the back pad 20 capable of color rendering end-of-life can also be laminated onto a grinding device (not shown) by means of the gum film.
FIG. 4 shows a schematic structural view of a back pad according to another embodiment of the present disclosure.
Referring to FIG. 4, in another embodiment, an adhesive layer 24 can be disposed between the dye capsule layer 22 and the carrier layer 23, so that the carrier layer 23 can be laminated onto the dye capsule layer 22 through the adhesive layer 24. Preferably, the adhesive layer 24 is a gum film or a paste, and a material of the carrier layer 23 can be polyethylene terephthalate (PET).
FIG. 5 shows a schematic view of color rendering of a back pad capable of color rendering end-of-life in water penetration according to the present disclosure.
Referring to FIG. 5, after water penetrates in the back pad 20 capable of color rendering end-of-life, the dye micro-capsules 221 of the dye capsule layer 22 can be dissolved with water and then releases the dyes 221D, and the end-of-life of the back pad 20 can be easily determined through a color-rendering effect of the dyes 221D.
FIG. 6 is a flow diagram of a manufacturing method for a back pad capable of color rendering end-of-life according to the present disclosure. FIG. 7A shows a schematic view of an absorption layer in the manufacturing method according to the present disclosure. FIG. 7B shows a schematic view of forming a dye capsule is layer on a surface of an absorption layer according to the manufacturing method of the present disclosure. FIG. 7C shows a schematic view of laminating a carrier layer onto a dye capsule layer according to the manufacturing method of the present disclosure.
With reference to step S61 in FIG. 6 and FIG. 7A, an absorption layer 21 is provided, and the absorption layer 21 has a surface 21S. In this embodiment, the absorption layer 21 is a polyurethane (PU) film.
With reference to step S62 in FIG. 6 and FIG. 7B, a dye capsule layer 22 is formed on the surface 21S of the absorption layer 21. In this step, the dye capsule layer 22 can be formed on the surface 21S of the absorption layer 21 by means of either coating or spraying.
In addition, the dye capsule layer 22 includes at least one dye micro-capsule 221. In this embodiment, the dye capsule layer 22 includes a plurality of dye micro-capsules 221.
Referring to FIG. 3 and FIG. 7B again, the dye micro-capsule 221 includes a soluble capsule body 221C and a dye 221D. The dye 221D is disposed in the soluble capsule body 221C. In this embodiment, the soluble capsule body 221C can be dissolved with water and then releases the dye 221D, so as to achieve a color-rendering effect.
With reference to step S63 in FIG. 6 and FIG. 7C, a carrier layer 23 is laminated onto the dye capsule layer 22. In this embodiment, the carrier layer 23 is a gum film, and the gum film can be directly laminated onto the dye capsule layer 22.
Referring to FIG. 4 again, or, in another embodiment, an adhesive layer 24 can be disposed between the dye capsule layer 22 and the carrier layer 23, so that the carrier layer 23 can be laminated onto the dye capsule layer 22 through the adhesive layer 24. Preferably, the adhesive layer 24 is a gum film or a paste, and a material of the carrier layer 23 can be polyethylene terephthalate (PET).
Furthermore, the adhesive layer 24 can be disposed between the dye is capsule layer 22 and the carrier layer 23 by using either of the two methods as follows:
1. In step S62, the adhesive layer 24 is disposed on the dye capsule layer 22, so that the carrier layer 23 can be laminated onto the dye capsule layer 22 through the adhesive layer 24 in step S63.
2. In step S63, the adhesive layer 24 is disposed on the carrier layer 23, and the carrier layer 23 is then laminated onto the dye capsule layer 22 through the adhesive layer 24.
Referring to FIG. 7C again, in order to maintain a bonding strength between the carrier layer 23 and the absorption layer 21 and the structural strength of the back pad 20 capable of color rendering end-of-life, the thickness of the dye capsule layer 22 should not be excessively thin or excessively thick. Preferably, a thickness of the dye capsule layer 22 should be controlled in a range of 10 μm to 1000 μm inclusive, and the thickness of the dye capsule layer 22 should be less than a thickness of the absorption layer 21 and less than a thickness of the carrier layer 23.
Furthermore, to successfully control the thickness of the dye capsule layer 22 in a range of 10 μm to 1000 μm inclusive, preferably, a length of the dye micro-capsule 221 should be controlled in a range of 10 μm to 100 μm inclusive.
Moreover, the scope of the present application is not intended to be limited to the particular embodiments of the process, machine, manufacture, and composition of matter, means, methods and steps described in the specification. As those skilled in the art will readily appreciate form the present disclosure, processes, machines, manufacture, compositions of matter, means, methods, or steps, presently existing or later to be developed, that perform substantially the same function or io achieve substantially the same result as the corresponding embodiments described herein may be utilized according to the present disclosure.
Accordingly, the appended claims are intended to include within their scope such processes, machines, manufacture, and compositions of matter, means, methods or steps. In addition, each claim constitutes a separate embodiment, and the is combination of various claims and embodiments are within the scope of the invention.

Claims

What is claimed is:

1. A back pad capable of color rendering end-of-life, comprising:

an absorption layer having a surface;

a dye capsule layer disposed on the surface of the absorption layer; and

a carrier layer laminated onto the dye capsule layer.

2. The back pad of claim 1, wherein the absorption layer is a polyurethane (PU) film.

3. The back pad of claim 1, wherein the dye capsule layer includes at least io one dye micro-capsule.

4. The back pad of claim 3, wherein a length of the dye micro-capsule is in a range of 10 μm to 100 μm inclusive.

5. The back pad of claim 3, wherein the dye micro-capsule includes a soluble capsule body and a dye disposed in the soluble capsule body.

6. The back pad of claim 1, wherein a thickness of the dye capsule layer is in a range of 10 μm to 1000 μm inclusive.

7. The back pad of claim 1, wherein a thickness of the dye capsule layer is less than a thickness of the absorption layer.

8. The back pad of claim 1, wherein a thickness of the dye capsule layer is less than a thickness of the carrier layer.

9. The back pad of claim 1, wherein the carrier layer is a gum film.

10. The back pad of claim 1, further comprising an adhesive layer disposed between the dye capsule layer and the carrier layer.