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Method for utilizing vulcanizing machine to detect heat stabilizers

A heat stabilizer and vulcanizer technology, applied in the detection field, can solve the problems of poor use effect, waste of energy, time and capital investment, and the thermal stability detection of PVC injection molding products is not necessarily effective, etc., to achieve accurate, effective and low-cost results. Cost, wide application effect

Active Publication Date: 2019-08-23
台州联成新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above method is especially effective for testing PVC extrusion or calendering products, because the above detection method simulates the actual production process, but it is not necessarily effective for thermal stability testing of PVC injection molding products, because PVC injection molding process is closed and oxygen-free It is carried out in a heated and pressurized environment, which leads to a problem. The heat stabilizer developed by the heat stabilizer manufacturer according to the above-mentioned detection methods does not work well in the customer's injection molding process, which causes heat stabilizer manufacturers and customers. A lot of energy, time and money were wasted in vain

Method used

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  • Method for utilizing vulcanizing machine to detect heat stabilizers
  • Method for utilizing vulcanizing machine to detect heat stabilizers
  • Method for utilizing vulcanizing machine to detect heat stabilizers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Heat stability test of heat stabilizer for the same PVC soft product.

[0028] Set the temperature of the vulcanizer to 160°C, and the observation time for each slice is 30 minutes. The sheet metal mold has 8 identical hollow circles (see figure 1 ), the diameter of the hollow circle is 50mm, the thickness is 1mm, the thickness of the plywood is 1mm, and the side length is 300mm. Weigh 3 kg of mixture according to the following weight ratios, PVC: 100, calcium zinc heat stabilizer: 3, plasticizer: 40, calcium carbonate: 20, lubricant: 0.3. Put the mixture into a 10L high-speed mixer and mix for 10 minutes, stop, take 150 grams of the mixture and add it to a two-roller machine for 5 minutes at 160°C, the thickness is 1.5mm, cut thin slices according to the size of the hollow circle, and put them into the mold middle. The upper and lower parts of the mold are fixed by metal plates, and put into the vulcanizing machine together. After 30 minutes, the mold was removed, ...

Embodiment 2

[0030] Heat stability test of heat stabilizer for the same PVC hard product.

[0031] Set the temperature of the vulcanizer to 200°C, and the observation time for each slice is 5 minutes. The sheet metal mold has 6 identical hollow squares (see figure 2 ), the side length of each square is 60mm, the thickness is 1.5mm, the thickness of the splint is 1mm, and the side length is 300mm. Weigh 3 kg of mixture according to the following weight ratios, PVC: 100, composite lead heat stabilizer: 4, CPE: 8, calcium carbonate: 10, ACR: 3, lubricant: 1.0. Put the mixture into a 10L high-speed mixer and mix for 10 minutes, stop, take 150 grams of the mixture and add it to the two-roll machine: 200 ° C for 5 minutes, the thickness is 1.0mm, cut thin slices according to the size of the hollow groove, each groove Put 2 thin slices inside and put in the mold. The upper and lower parts of the mold are fixed by metal plates, and put into the vulcanizing machine together. After 5 minutes, t...

Embodiment 3

[0033] Thermal stability test comparison of different thermal stabilizer samples.

[0034] 1. Set the temperature of the vulcanizer to 180°C, and the observation time for each slice is 15 minutes.

[0035] 2. There are 2 same hollow circles in the sheet metal mold (see image 3 ), a square with a diameter of 80mm, a thickness of 1mm, a plywood thickness of 1mm, and a side length of 200mm.

[0036] 3. Weigh 3 kg of mixture according to the following weight ratio (1# sample: PVC: 100, organotin heat stabilizer 1#: 1, plasticizer: 40, lubricant: 0.5. 2# sample: PVC: 100, Organotin heat stabilizer 2#: 1, plasticizer: 30, lubricant: 0.5.) Put the above mixture into a 10L high-speed mixer and mix for 10 minutes, stop, take 150 grams of mixture and add it to the two-roller machine Refined at 170°C for 5 minutes, the thickness is 1.5mm.

[0037] 4. Cut the slices according to the size of the hollow circle and put them into the mold. The upper and lower parts of the mold are fixed ...

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Abstract

The invention relates to a method for utilizing a vulcanizing machine to detect heat stabilizers. The method includes cutting hollow grooves with consistent shapes and sizes in a sheet metal to obtaina mold, taking two metal clamping plates, and starting a flat vulcanizing machine to perform preheating; weighing PVC resin powder, a heat stabilizer and an auxiliary material according to a formulaof a detection product, obtaining a premix in a high-speed mixer through stirring, and then, putting the premix into a two-roll machine to perform open smelting, and obtaining a PVC piece after taking-out and cooling; flatwise placing the mold on the metal clamping plates, cutting the PVC piece to put into the empty grooves of the mold, putting the other metal plate on the mold to put into the vulcanizing machine together, taking out the mold after the time arrives, naturally cooling the PVC piece, and observing color changes, surface situations and transparency; and contrasting and testing the heat stability, surface situations and transparency of 1-10 heat stabilizers at different time. The method is accurate and effective in result, low in cost, simple in operation and wide in applicability.

Description

technical field [0001] The invention relates to a method for detecting a heat stabilizer by using a vulcanizer, and belongs to the technical field of detection. Background technique [0002] There are many detection methods for PVC (Chinese polyvinyl chloride, hereinafter referred to as PVC) heat stabilizer, commonly used (with national standards or industry standards) are hot oven method, two-roller open refining method, Congo red time test method, flow test method, etc. Variable instrument method, the above test method tests the static stability, dynamic stability and processing performance of the heat stabilizer. The above method is especially effective for testing PVC extrusion or calendering products, because the above detection method simulates the actual production process, but it is not necessarily effective for thermal stability testing of PVC injection molding products, because PVC injection molding process is closed and oxygen-free It is carried out in a heated a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/29G01N21/59G01B11/30G01N1/44G01N1/36
CPCG01N21/29G01N21/59G01B11/30G01N1/44G01N1/36G01N2001/366
Inventor 韦广华
Owner 台州联成新材料有限公司
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