CN111267275A - PET and low-temperature silica gel vulcanization forming application process - Google Patents
PET and low-temperature silica gel vulcanization forming application process Download PDFInfo
- Publication number
- CN111267275A CN111267275A CN201911322173.4A CN201911322173A CN111267275A CN 111267275 A CN111267275 A CN 111267275A CN 201911322173 A CN201911322173 A CN 201911322173A CN 111267275 A CN111267275 A CN 111267275A
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- Prior art keywords
- silica gel
- pet
- color master
- temperature
- vulcanizing agent
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Classifications
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- 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
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
-
- 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
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/002—Component parts, details or accessories; Auxiliary operations
-
- 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
- B29C69/00—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
- C08L83/04—Polysiloxanes
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- Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
The invention relates to the field of silica gel forming, and discloses a vulcanization forming application process of PET and low-temperature silica gel, which comprises the steps of sequentially carrying out cutting, coiling, slicing, punching, brushing a treating agent and baking on a PET sheet, carrying out pretreatment for adhesion forming with the silica gel, mixing the silica gel, white color master, black color master, platinum vulcanizing agent 25B and an internal releasing agent, uniformly mixing the silica gel, the white color master, the black color master, the platinum vulcanizing agent 25B and the internal releasing agent, adding platinum vulcanizing agent 25A, continuously and uniformly mixing, effectively reducing the subsequent vulcanization forming temperature by the platinum vulcanizing agent, conveniently carrying out subsequent demolding treatment by adding a proper amount of the internal releasing agent, finally putting the treated PET sheet and the silica gel mixing ingredient into a forming machine for vulcanization forming, wherein the temperature of a forming die in the forming machine is 90-110 ℃, and PET is basically not deformed when a product is taken down from the upper surface of the die, the flat product surface can still be kept.
Description
Technical Field
The invention relates to a silica gel forming process, in particular to a vulcanization forming application process of PET and low-temperature silica gel.
Background
In the silica gel industry, in the molding and utilization of silica gel, the silica gel and the PET sheet are combined to restrict the shape and size of the molded silica gel in many times. In actual use and manufacture, the normal vulcanization temperature of common silica gel is 180-195 degrees, and the temperature that the high-temperature-resistant PET can bear is below 190 degrees, but after the silica gel and the PET are vulcanized and formed into a whole, the PET deforms and cannot restore the flat product surface when the product is taken down from the mold.
Disclosure of Invention
The invention aims to provide an application process for vulcanization molding of PET and low-temperature silica gel.
The technical scheme adopted by the invention for solving the technical problems is as follows: a vulcanization molding application process of PET and low-temperature silica gel comprises the following steps:
the method comprises the following steps: and sequentially carrying out coil cutting, slicing, punching, brushing of a treating agent and baking on the PET sheet, and carrying out pretreatment on the PET sheet for adhesion forming with silica gel.
Step two: mixing the silica gel, the white color master batch, the black color master batch, the platinum vulcanizing agent 25B and the internal release agent, uniformly mixing the silica gel, the white color master batch, the black color master batch, the platinum vulcanizing agent 25B and the internal release agent, adding the platinum vulcanizing agent 25A, and continuously and uniformly mixing. The platinum vulcanizing agent effectively reduces the subsequent vulcanization molding temperature, and the proper amount of the internal mold release agent is added to facilitate the subsequent mold release treatment.
Step three: and (3) putting the PET sheet and the silica gel mixed ingredients processed in the first step and the second step into a forming machine for vulcanization forming, wherein the temperature of a forming die in the forming machine is 90-110 ℃, and when the product is taken off from the die, the PET is basically not deformed, and the flat surface of the product can still be kept.
Further, the method comprises the following steps: the silica gel ingredient in the step two comprises silica gel, white color master batch, black color master batch, platinum vulcanizing agent 25B, internal mold release agent and platinum vulcanizing agent 25A, wherein the mass ratio of the silica gel ingredient to the platinum vulcanizing agent is 9980-10020: 199-201: 2-6: 155-165: 28-32: 95-105.
Further, the method comprises the following steps: the mixing temperature in the second step is 115 to 120 ℃.
Further, the method comprises the following steps: the mixing time in the second step is 120 to 180 seconds.
Detailed Description
The present invention will be further described with reference to the following embodiments.
A vulcanization molding application process of PET and low-temperature silica gel comprises the following steps:
the method comprises the following steps: the PET sheet is sequentially subjected to coil cutting, slicing, punching, brushing of a treating agent and baking, the PET sheet is processed into a preset shape through coil cutting, slicing and punching, and then the treating agent is coated, namely coating processing is carried out, so that the physical and technical properties and the surface chemical properties of the material surface are improved, and the pretreatment is carried out for adhesion with silica gel.
Step two: mixing the silica gel, the white color master batch, the black color master batch, the platinum vulcanizing agent 25B and the internal release agent, uniformly mixing the silica gel, the white color master batch, the black color master batch, the platinum vulcanizing agent 25B and the internal release agent, adding the platinum vulcanizing agent 25A, and continuously and uniformly mixing. The silica gel used was commercially available 5250 silica gel: the platinum vulcanizing agent 25B and the platinum vulcanizing agent 25A are TC-25B and TC-25A component vulcanizing agents sold in the market, are subjected to cooling treatment immediately after the silica gel is vulcanized, can be stored for a long time at a lower temperature so as to prevent the silica gel from being cured in advance at a higher temperature due to a longer production line, effectively reduce the subsequent vulcanization molding temperature, and perform normal vulcanization operation at 90-110 ℃; the proper amount of the internal release agent is added to facilitate the subsequent release treatment.
Step three: and (3) putting the PET sheet and the silica gel mixed ingredients processed in the first step and the second step into a forming machine for vulcanization forming, wherein the temperature of a forming die in the forming machine is 90-110 ℃, normal vulcanization operation is carried out at 90-110 ℃, the temperature of the die at 90-110 ℃ is such that PET is not deformed basically when the product is taken off from the die, and the flat surface of the product can still be maintained. In actual use, after the silica gel is vulcanized and formed, the silica gel can be sequentially covered with the 3M4914 foam substrate double-sided adhesive, the TESA60980 non-woven fabric substrate double-sided adhesive and the fluorine release film, so that the size can be effectively controlled for actual utilization.
On the basis of the above: the silica gel ingredient in the step two comprises silica gel, white color master batch, black color master batch, platinum vulcanizing agent 25B, internal mold release agent and platinum vulcanizing agent 25A, wherein the mass ratio of the silica gel ingredient to the platinum vulcanizing agent is 9980-10020: 199-201: 2-6: 155-165: 28-32: 95-105. In actual operation, the mass of the silica gel, the mass of the white color masterbatch, the mass of the black color masterbatch, the mass of the platinum vulcanizing agent 25B, the mass of the internal mold release agent and the mass of the platinum vulcanizing agent 25A are respectively 1000 g, 20 g, 0.4 g, 16 g, 3 g and 10 g.
On the basis of the above: the mixing temperature in the second step is 115 to 120 ℃.
On the basis of the above: the mixing time in the second step is 120 to 180 seconds.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. The application process for vulcanization molding of PET and low-temperature silica gel is characterized by comprising the following steps of:
the method comprises the following steps: sequentially carrying out coil cutting, slicing, stamping, brushing a treating agent and baking on the PET sheet;
step two: mixing silica gel, white color master batch, black color master batch, platinum vulcanizing agent 25B and internal releasing agent, adding platinum vulcanizing agent 25A after mixing silica gel, white color master batch, black color master batch, platinum vulcanizing agent 25B and internal releasing agent uniformly, and continuing mixing uniformly;
step three: putting the PET sheet and the silica gel mixed material processed in the first step and the second step into a forming machine for vulcanization forming, wherein the temperature of a forming die in the forming machine is 90-110 ℃;
2. the vulcanization molding application process of PET and low-temperature silica gel according to claim 1, characterized in that: the silica gel ingredient in the step two comprises silica gel, white color master batch, black color master batch, platinum vulcanizing agent 25B, internal mold release agent and platinum vulcanizing agent 25A, wherein the mass ratio of the silica gel ingredient to the platinum vulcanizing agent is 9980-10020: 199-201: 2-6: 155-165: 28-32: 95-105.
3. The vulcanization molding application process of PET and low-temperature silica gel according to claim 1, characterized in that: the mixing temperature in the second step is 115 to 120 ℃.
4. The vulcanization molding application process of PET and low-temperature silica gel according to claim 1, characterized in that: the mixing time in the second step is 120 to 180 seconds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911322173.4A CN111267275A (en) | 2019-12-20 | 2019-12-20 | PET and low-temperature silica gel vulcanization forming application process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911322173.4A CN111267275A (en) | 2019-12-20 | 2019-12-20 | PET and low-temperature silica gel vulcanization forming application process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111267275A true CN111267275A (en) | 2020-06-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911322173.4A Withdrawn CN111267275A (en) | 2019-12-20 | 2019-12-20 | PET and low-temperature silica gel vulcanization forming application process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111267275A (en) |
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2019
- 2019-12-20 CN CN201911322173.4A patent/CN111267275A/en not_active Withdrawn
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20200612 |