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Polyvinyl chloride foam material and preparation method thereof

A foaming material, polyvinyl chloride technology, applied in the field of polyvinyl chloride foaming material and its preparation, can solve the problems of high degree of polymerization of adipic acid polyester oil, low degree of polymerization of plasticizer, exceeding the test index, etc. Achieve the effect of large market prospect, uniform coloring, and not easy to precipitate

Inactive Publication Date: 2018-12-07
广东远华新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, the main polyvinyl chloride foaming products on the market, the common plasticizers used have a small degree of polymerization and a low viscosity. After leaching of 3% acetic acid, 10% ethanol, 95% ethanol, and isooctane solution, it is very easy. Precipitation, often exceeding test specifications
On the other hand, if the adipic acid polyester oil (UN615) used has a high degree of polymerization, it will be difficult to process

Method used

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  • Polyvinyl chloride foam material and preparation method thereof

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preparation example Construction

[0033] The present invention also provides the preparation method of this kind of polyvinyl chloride foam material simultaneously, comprises the following steps:

[0034] 1) Stir the polyvinyl chloride paste resin and filler to control the viscosity to 30000-50000mPa·s;

[0035] 2) Adipic acid polyester oil, foaming agent, and potassium-zinc stabilizer are stirred at a frequency of 25-35 Hz, and the material obtained in step 1) is poured into;

[0036] 3) Increase the stirring speed by 10Hz, add viscosity reducer after stirring, until the viscosity is 3000-5000mPa·s;

[0037] 4) Soak the toner and adipic acid polyester oil in a weight ratio of 1:0.5-0.7, and add to the feed liquid in step 3);

[0038] 5) Put the material liquid obtained in step 4) on the foaming coating table, and pass through five steam chambers with temperatures of 225±2°C, 220±2°C, 210±2°C, 205±2°C and 130±2°C in sequence. The bubble area is cooled by a cooling roller to obtain a polyvinyl chloride foam m...

Embodiment 1

[0049] A polyvinyl chloride foaming material, which is made of the following components by weight: 35 parts of polyvinyl chloride paste resin, 25 parts of adipic acid polyester oil, 26 parts of filler, 7 parts of viscosity reducer , 3.5 parts of blowing agent, 0.7 part of potassium zinc stabilizer and 0.08 part of toner;

[0050] The method for preparing this polyvinyl chloride foam material may further comprise the steps:

[0051] 1) Stir the polyvinyl chloride paste resin and filler in the formula amount, and the viscosity is 41500mPa·s after stirring for 10 minutes;

[0052] 2) Adipic acid polyester oil, foaming agent, and potassium-zinc stabilizer are stirred at a frequency of 30 Hz, and the material obtained in step 1) is poured in at a flow rate of 10 wt % / min; The mixture of ethylene paste resin and filler is 10% of the total mass of raw materials in the kettle;

[0053] 3) Increase the stirring speed by 10Hz, add the viscosity reducer at a speed of 10wt% / min while st...

Embodiment 2

[0057] A polyvinyl chloride foaming material, which is made of the following components by weight: 25 parts of polyvinyl chloride paste resin, 30 parts of adipic acid polyester oil, 30 parts of filler, 9 parts of viscosity reducer , 2.5 parts of blowing agent, 0.5 part of potassium zinc stabilizer and 0.05 part of toner;

[0058] The method for preparing this polyvinyl chloride foam material may further comprise the steps:

[0059] 1) Stir the polyvinyl chloride paste resin and filler in the formula amount, and the viscosity is 34500mPa·s after stirring for 10 minutes;

[0060] 2) Adipic acid polyester oil, foaming agent, and potassium-zinc stabilizer are stirred at a frequency of 30 Hz, and the material obtained in step 1) is poured in at a flow rate of 15 wt % / min;

[0061] 3) Increase the stirring speed by 10Hz, add the viscosity reducer at a speed of 10wt% / min while stirring, and after stirring for 15min, the detected viscosity is 3600mPa·s;

[0062] 4) Soak the toner an...

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Abstract

The invention discloses a polyvinyl chloride foam material. The polyvinyl chloride foam material prepared from, by weight, 25-50 parts of polyvinyl chloride paste resin, 20-30 parts of adipic acid polyester oil, 22-30 parts of a filler, 5-9 parts of a viscosity reducer, 2-5 parts of a foaming agent, 0.5-0.9 part of a potassium-zinc stabilizer and 0.05-0.1 part of a toner. The polyvinyl chloride foam material has a low precipitation rate and a low transfer rate in LFGB test by selectively controlling the self viscosity of raw materials and carrying out viscosity-reducing treatment in the processing process, and has a great market prospect as a food grade material.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a polyvinyl chloride foam material and a preparation method thereof. Background technique [0002] The polyvinyl chloride foam products currently used in the market generally cannot pass the German LFGB food-grade test because the surface plasticizer is easy to precipitate. This reason makes it difficult for food-grade PVC materials to be accepted by the European market. [0003] PVC foam products want to pass the German LFGB test to set strict standards for the total amount of harmful substances migrated from the product in a specific solvent, the content of vinyl chloride monomer, specific heavy metals, aromatic amines and phthalates control indicators. [0004] The total amount of harmful substances means that the overall migration amount of the four is less than 10mg / dm after leaching the test sample with 3% acetic acid, 10% ethanol, 95% ethanol, and isooctane sol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/00C08L27/06C08L67/00C08K3/34
CPCC08J9/00C08J9/0023C08J9/0066C08J9/0095C08J2327/06C08J2467/00
Inventor 李伟健夏冠明
Owner 广东远华新材料股份有限公司
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