CN108481728B - Protective film pasting process - Google Patents
Protective film pasting process Download PDFInfo
- Publication number
- CN108481728B CN108481728B CN201810245689.2A CN201810245689A CN108481728B CN 108481728 B CN108481728 B CN 108481728B CN 201810245689 A CN201810245689 A CN 201810245689A CN 108481728 B CN108481728 B CN 108481728B
- Authority
- CN
- China
- Prior art keywords
- leather
- protective film
- film
- pet protective
- pasting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000001681 protective effect Effects 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000010985 leather Substances 0.000 claims abstract description 81
- 239000003292 glue Substances 0.000 claims abstract description 16
- 239000011248 coating agent Substances 0.000 claims abstract description 9
- 238000000576 coating method Methods 0.000 claims abstract description 9
- 238000001816 cooling Methods 0.000 claims abstract description 6
- 238000004080 punching Methods 0.000 claims abstract description 6
- 239000002699 waste material Substances 0.000 claims abstract description 6
- 239000002313 adhesive film Substances 0.000 claims abstract description 3
- 238000010030 laminating Methods 0.000 claims description 10
- 239000000853 adhesive Substances 0.000 claims 1
- 230000001070 adhesive effect Effects 0.000 claims 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
- B29C63/02—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using sheet or web-like material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
- B26F1/38—Cutting-out; Stamping-out
- B26F1/40—Cutting-out; Stamping-out using a press, e.g. of the ram type
Abstract
The invention relates to a process for pasting a protective film, which comprises the following steps: 1) after the PU leather is coated with glue at high temperature, cooling for a period of time, and then uncovering adhesive film release paper on the surface of the PU leather; 2) the PU leather is kept stand for 48 hours under the environment that the temperature is 21-25 ℃ and the humidity is 50-70 percent until the PU leather shrinks to the size before high-temperature glue coating; 3) the PET protective film is flatly pasted on the surface of the PU leather, so that the pasting film is flat and bubble-free; 4) standing the PU leather stuck with the PET protective film for 1 hour; 5) using a cutting die to perform shape punching on the PU leather pasted with the PET protective film on a punch press, and removing the waste edges of the PET protective film; 6) and (5) checking whether the sticking film is qualified. The invention solves the problem that the size of the PU leather is difficult to control.
Description
Technical Field
The invention relates to a process for pasting a protective film.
Background
The PU leather has different expansion coefficients at different temperatures, and after the PU leather is coated with glue at high temperature, the size of the PU leather is unstable due to the own elasticity, so that the product quality can not meet the requirements.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: provides a protective film pasting process capable of reducing the size change of PU leather.
In order to solve the technical problems, the invention adopts the technical scheme that:
a process for pasting a protective film comprises the following steps:
1) after the PU leather is coated with glue at high temperature, cooling for a period of time, and then uncovering adhesive film release paper on the surface of the PU leather;
2) the PU leather is kept stand for 46 to 50 hours under the environment that the temperature is 21 to 25 ℃ and the humidity is 50 to 70 percent until the PU leather shrinks to the size before high-temperature glue coating;
3) the PET protective film is flatly pasted on the surface of the PU leather, so that the pasting film is flat and bubble-free;
4) standing the PU leather stuck with the PET protective film for 40-80 minutes;
5) using a cutting die to perform shape punching on the PU leather pasted with the PET protective film on a punch press, and removing the waste edges of the PET protective film;
6) and (5) checking whether the sticking film is qualified.
Preferably, between the step 2) and the step 3), the adhesion of the PET protective film is selected according to the smoothness and the texture of the surface of the PU leather.
Preferably, the adhesion of the PET protective film is 70 g.
Preferably, in the step 3), the PET protective film is flatly pasted on the surface of the PU leather through a film laminating machine, and the air pressure of the film laminating machine is 0.28 MPa-0.32 MPa.
Preferably, between the step 3) and the step 4), the PET protective film attached to the PU leather needs to be subjected to a pull-out resistance test, wherein the pull-out resistance is less than 3 kg.
Preferably, in step 2), the humidity is 60%.
Preferably, in step 1), the PU leather is coated at a temperature of 130 ℃.
The invention has the advantages that: 1. the dimension of the PU leather can be effectively controlled, the tolerance of the existing PU leather in the length of 320mm is +/-0.3 mm, and the tolerance of the PU leather after film pasting is +/-0.1 mm in the length of 320mm, so that the problem that the dimension of the PU leather is difficult to control is solved. 2. Can ensure the cleanness of the PU leather surface.
Detailed Description
The present invention will be described in detail with reference to the following embodiments in order to make the aforementioned objects, features and advantages of the invention more comprehensible. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
Unless defined otherwise, all 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. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Example 1
A process for pasting a protective film comprises the following steps:
1) coating the PU leather with glue at the temperature of 130 ℃, cooling for a period of time, and then uncovering the glue film release paper on the surface of the PU leather;
2) standing the PU leather for 46 hours at the temperature of 21 ℃ and the humidity of 50% until the PU leather shrinks to the size before high-temperature glue coating;
3) the adhesion of the PET protective film needs to be selected according to the smoothness and the lines of the PU leather surface. The adhesion force of the embodiment is 70g, the PET protective film is flatly pasted on the surface of the PU leather through a film laminating machine, the air pressure of the film laminating machine is 0.28MPa, and the film pasting is guaranteed to be flat and free of bubbles; carrying out a pull-out resistance test on the PET protective film attached to the PU leather, wherein the pull-out resistance is less than 3 kg;
4) standing the PU leather stuck with the PET protective film for 40 minutes;
5) using a cutting die to perform shape punching on the PU leather pasted with the PET protective film on a punch press, and removing the waste edges of the PET protective film;
6) and (5) checking whether the sticking film is qualified.
The invention has the advantages that: 1. the dimension of the PU leather can be effectively controlled, the tolerance of the existing PU leather in the length of 320mm is +/-0.3 mm, and the tolerance of the PU leather after film pasting is +/-0.1 mm in the length of 320mm, so that the problem that the dimension of the PU leather is difficult to control is solved. 2. Can ensure the cleanness of the PU leather surface.
Example 2
A process for pasting a protective film comprises the following steps:
1) coating the PU leather with glue at the temperature of 130 ℃, cooling for a period of time, and then uncovering the glue film release paper on the surface of the PU leather;
2) standing the PU leather for 48 hours at the temperature of 23 ℃ and the humidity of 60% until the PU leather shrinks to the size before high-temperature glue coating;
3) the adhesion of the PET protective film needs to be selected according to the smoothness and the lines of the PU leather surface. The adhesion force of the embodiment is 70g, the PET protective film is flatly pasted on the surface of the PU leather through a film laminating machine, the air pressure of the film laminating machine is 0.3MPa, and the film pasting is guaranteed to be flat and free of bubbles; carrying out a pull-out resistance test on the PET protective film attached to the PU leather, wherein the pull-out resistance is less than 3 kg;
4) standing the PU leather stuck with the PET protective film for 1 hour;
5) using a cutting die to perform shape punching on the PU leather pasted with the PET protective film on a punch press, and removing the waste edges of the PET protective film;
6) and (5) checking whether the sticking film is qualified.
The invention has the advantages that: 1. the dimension of the PU leather can be effectively controlled, the tolerance of the existing PU leather in the length of 320mm is +/-0.3 mm, and the tolerance of the PU leather after film pasting is +/-0.1 mm in the length of 320mm, so that the problem that the dimension of the PU leather is difficult to control is solved. 2. Can ensure the cleanness of the PU leather surface.
Example 3
A process for pasting a protective film comprises the following steps:
1) coating the PU leather with glue at the temperature of 130 ℃, cooling for a period of time, and then uncovering the glue film release paper on the surface of the PU leather;
2) standing the PU leather for 50 hours at the temperature of 25 ℃ and the humidity of 70% until the PU leather shrinks to the size before high-temperature glue coating;
3) the adhesion of the PET protective film needs to be selected according to the smoothness and the lines of the PU leather surface. The adhesion force of the embodiment is 70g, the PET protective film is flatly pasted on the surface of the PU leather through a film laminating machine, the air pressure of the film laminating machine is 0.32MPa, and the film pasting is guaranteed to be flat and free of bubbles; carrying out a pull-out resistance test on the PET protective film attached to the PU leather, wherein the pull-out resistance is less than 3 kg;
4) standing the PU leather stuck with the PET protective film for 80 minutes;
5) using a cutting die to perform shape punching on the PU leather pasted with the PET protective film on a punch press, and removing the waste edges of the PET protective film;
6) and (5) checking whether the sticking film is qualified.
The invention has the advantages that: 1. the dimension of the PU leather can be effectively controlled, the tolerance of the existing PU leather in the length of 320mm is +/-0.3 mm, and the tolerance of the PU leather after film pasting is +/-0.1 mm in the length of 320mm, so that the problem that the dimension of the PU leather is difficult to control is solved. 2. Can ensure the cleanness of the PU leather surface.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (7)
1. A process for pasting a protective film is characterized by comprising the following steps:
1) after the PU leather is coated with glue at high temperature, cooling for a period of time, and then uncovering adhesive film release paper on the surface of the PU leather;
2) the PU leather is kept stand for 46 to 50 hours under the environment that the temperature is 21 to 25 ℃ and the humidity is 50 to 70 percent until the PU leather shrinks to the size before high-temperature glue coating;
3) the PET protective film is flatly pasted on the surface of the PU leather, so that the pasting film is flat and bubble-free;
4) standing the PU leather stuck with the PET protective film for 40-80 minutes;
5) using a cutting die to perform shape punching on the PU leather pasted with the PET protective film on a punch press, and removing the waste edges of the PET protective film;
6) and (5) checking whether the sticking film is qualified.
2. The process for attaching a protective film according to claim 1, wherein between the step 2) and the step 3), the adhesion of the PET protective film is selected according to the smoothness and texture of the PU leather surface.
3. The process for attaching a protective film according to claim 1, wherein the adhesion of the PET protective film is 70 g.
4. The process for pasting the protective film according to claim 1, wherein in the step 3), the PET protective film is pasted on the surface of the PU leather by a film laminating machine, and the air pressure of the film laminating machine is 0.28MPa to 0.32 MPa.
5. The process for pasting the protective film according to claim 1, wherein between the step 3) and the step 4), the PET protective film pasted on the PU leather needs to be subjected to a pull-out resistance test, and the pull-out resistance is less than 3 kg.
6. The process for attaching a protective film according to claim 1, wherein in the step 2), the humidity is 60%.
7. The process for attaching a protective film according to claim 1, wherein in the step 1), the PU leather is coated with the adhesive at a temperature of 130 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810245689.2A CN108481728B (en) | 2018-03-23 | 2018-03-23 | Protective film pasting process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810245689.2A CN108481728B (en) | 2018-03-23 | 2018-03-23 | Protective film pasting process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108481728A CN108481728A (en) | 2018-09-04 |
| CN108481728B true CN108481728B (en) | 2020-01-03 |
Family
ID=63319373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810245689.2A Expired - Fee Related CN108481728B (en) | 2018-03-23 | 2018-03-23 | Protective film pasting process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108481728B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112078223A (en) * | 2020-09-18 | 2020-12-15 | 嘉善威尔尼绒业有限公司 | Laminating process of substrate plate and leather |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE630279A (en) * | 1956-11-23 | 1900-01-01 | ||
| CN1936171A (en) * | 2006-09-19 | 2007-03-28 | 赖百本 | Relief leather production method |
| CN203077772U (en) * | 2013-02-04 | 2013-07-24 | 孟杰 | Film laminating device |
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2018
- 2018-03-23 CN CN201810245689.2A patent/CN108481728B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN108481728A (en) | 2018-09-04 |
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