Environmental-friendly polyvinyl chloride (PVC) extraction-resistant anti-seepage film and preparation method thereof

A technology of polyvinyl chloride and polyvinyl chloride resin, which is applied in the field of environmentally friendly polyvinyl chloride anti-penetration anti-penetration membrane and its preparation, which can solve the problem of anti-penetration membrane resistance to low-temperature cracking, hardening of plasticizer extraction, and changes in mechanical properties and other problems, to achieve the effects of small change in mechanical properties, improved extraction resistance, and simple preparation process

Inactive Publication Date: 2014-01-08
TIANJIN TIANSU SCI & TECH GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the product is used in surface brine or lake brine and salt water, especially for liquid minerals with a salt content greater than 5, the impermeable membrane has resistance to low temperature cracking, aging decomposition, water resistance, and growth after immersion in brine. Technical problems such as hardening of the plasticizer after extraction, changes in mechanical properties, and poor creep properties

Method used

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  • Environmental-friendly polyvinyl chloride (PVC) extraction-resistant anti-seepage film and preparation method thereof
  • Environmental-friendly polyvinyl chloride (PVC) extraction-resistant anti-seepage film and preparation method thereof
  • Environmental-friendly polyvinyl chloride (PVC) extraction-resistant anti-seepage film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] An environmentally friendly polyvinyl chloride anti-pumping and anti-permeation membrane, comprising the distribution ratio of each component is

[0049]

[0050]Among them, the polyvinyl chloride resin is a mixture of SG-3 polyvinyl chloride with a degree of polymerization of 1300 and a degree of polymerization of 2500 in an equal weight ratio; the main plasticizer is a mixture of phthalic acid and trioctyl trimellitate. More preferably DOP and TOTM are mixed in equal weight ratio; auxiliary plasticizer is fatty acid dibasic acid ester and epoxy plasticizer, more preferably dioctyl adipate or dioctyl sebacate and epoxy soybean oil in equal weight ratio Mixing; the antioxidant is compounded with 2-hydroxy-4-n-octyloxybenzophenone and Doverphos DP-613 in an equal weight ratio; the filler is a mixture of activated calcium carbonate, talcum powder and carbon black, more preferably activated by a coupling agent The activated calcium carbonate is mixed with talcum powder,...

Embodiment 2

[0052] An environmentally friendly polyvinyl chloride anti-pumping and anti-permeation membrane, comprising the distribution ratio of each component is

[0053]

[0054] The main plasticizer is a mixture of phthalic acid and trioctyl trimellitate, more preferably DOP and TOTM are mixed in equal weight ratios; the auxiliary plasticizer is fatty acid dibasic acid ester and epoxy plasticizer, more preferably Dioctyl adipate or dioctyl sebacate and epoxidized soybean oil are mixed in equal weight ratio; antioxidant is compounded in equal weight ratio of 2-hydroxy-4-n-octyloxybenzophenone and Doverphos DP-613 ; The filler is mixed with active calcium carbonate, talcum powder and carbon black in equal weight ratios.

Embodiment 3

[0056] A method for preparing an environmental-friendly polyvinyl chloride extraction-resistant anti-penetration membrane, comprising the following steps:

[0057] (1) Kneading material preparation: After automatic metering of polyvinyl chloride resin, plasticizer, heat stabilizer, filler, antioxidant, lubricant and modifier, carry out high-speed mixing, and transfer to cold stirring after high-speed mixing to cool; When preparing the kneading material, the high-speed mixing termination temperature is 80-120°C, preferably 90-115°C; the cold stirring termination temperature is 20-60°C, preferably 35-45°C.

[0058] (2) Plasticization: Feed the mixture obtained in step (1) into a planetary extruder for plasticization; during plasticization, the temperature in each zone of the planetary extruder is 140-200°C, preferably 150-180°C, and the extrusion speed It is 20-70 rev / min, preferably 40-60 rev / min;

[0059] (3) Calendering: Put the fully plasticized material obtained in step (1...

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Abstract

The invention relates to an environmental-friendly polyvinyl chloride (PVC) extraction-resistant anti-seepage film and a preparation method thereof, belonging to the technical field of salt film preparation. The environmental-friendly PVC extraction-resistant anti-seepage film contains the following ingredients in proportioning ratio: 100 parts by mass of PVC resin, 10-50PHR of primary plasticizer, 2-10PHR of secondary plasticizer, 2-5PHR of environmental-friendly heat stabilizer, 0.1-0.5PHR of antioxidant, 6-30PHR of filler and 0.1-0.3PHR of lubricant. The preparation method of the environmental-friendly PVC extraction-resistant anti-seepage film comprises the steps of (1) preparing a kneaded material: metering all the ingredients, mixing and cooling; (2) plasticizing: plasticizing by using a planetary extruder; (3) calendering: filtering the material in a filter, and feeding the material to a calender; (4) spreading: after the material passes through the calender, spreading to widen, and then, cooling for forming, thereby preparing the environmental-friendly PVC extraction-resistant anti-seepage film. According to the environmental-friendly PVC extraction-resistant anti-seepage film and the preparation method thereof, the preparation process is simple, and the controllability is good; the product has the advantages of good water and brine extraction resisting performance, high mechanical properties, little loss, high retention rate, and the like.

Description

technical field [0001] The invention belongs to the technical field of salt membrane preparation, and in particular relates to an environmental-friendly polyvinyl chloride extraction-resistant anti-penetration membrane and a preparation method thereof. Background technique [0002] At present, salt pond crystallization ponds, garbage landfills, sewage and waste residue treatment plants, underground buildings, national defense projects, tunnels and national reserve caverns, roof waterproofing projects, etc. are suitable for environmental protection and other projects with harsh conditions of use and high performance indicators. Use high-quality high-density polyethylene anti-seepage and anti-corrosion materials. Compared with polyethylene film, polyvinyl chloride film has higher mechanical strength, better anti-aging performance, good elasticity, and can be restored after stretching; It is prone to surface cracking and embrittlement prematurely under strong sunlight. [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08K13/02C08K5/12C08K5/11C08K5/1515C08K3/26C08K3/34
Inventor 张虹袁东风宋正红王琦
Owner TIANJIN TIANSU SCI & TECH GROUP
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