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Polrvinyl chloride preservative film and preparation method thereof

A technology of polyvinyl chloride and polyvinyl chloride resin, applied in the field of polyvinyl chloride cling film and its preparation, can solve the problems of complex process, brittleness, high cost, etc., and achieve the goals of reducing environmental pollution, simple production process, and good mechanical properties Effect

Inactive Publication Date: 2012-12-19
TIANJIN SHENGTIANLI MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the use of existing polyvinyl chloride cling film, DOP is easy to migrate, which will cause the polyvinyl chloride cling film to become hard, brittle, and yellow during use and storage, reduce air permeability and moisture permeability, and migrate out The DOP has adverse effects on the surrounding environment and the growth of animals and plants
Existing methods for inhibiting DOP migration are costly, complicated, and difficult to implement

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0025] A polyvinyl chloride preservative film is made of the following raw materials in parts by mass,

[0026] SG-4 polyvinyl chloride resin 100 kg;

[0027] Calcium-zinc composite stabilizer 4 kg;

[0028] Stearic acid 0.5 kg;

[0029] Dioctyl phthalate 45 kg;

[0030] The organic modifier is CH 3 (CH 2 ) 17 NH 3 + 0.5 kg of organically modified montmorillonite.

[0031] First, change the organic modifier to CH 3 (CH 2 ) 17 NH 3 + The organically modified montmorillonite was preheated and dried at 80°C for 3 hours to remove the moisture therein. Then, add SG-4 type polyvinyl chloride resin into dioctyl phthalate, when the SG-4 type polyvinyl chloride resin is fully swollen, add the preheated and dried organic modifier as CH 3 (CH 2 ) 17 NH 3 + Organically modified montmorillonite, calcium-zinc composite stabilizer and stearic acid, and mixed evenly. The above mixture was prepared into a polyvinyl chloride film through kneading, extrusion and blow molding p...

no. 2 example

[0033] A polyvinyl chloride preservative film is made of the following raw materials in parts by mass,

[0034] SG-4 polyvinyl chloride resin 100 kg;

[0035] Calcium-zinc composite stabilizer 4 kg;

[0036] Stearic acid 1 kg;

[0037] Dioctyl phthalate 60 kg;

[0038] The organic modifier is CH 3 (CH 2 ) 17 NH 3 + 2 kg of organically modified montmorillonite.

[0039] First, change the organic modifier to CH 3 (CH 2 ) 17 NH 3 + The organically modified montmorillonite was preheated and dried at 80°C for 3 hours to remove the moisture therein. Then, add SG-4 type polyvinyl chloride resin into dioctyl phthalate, when the SG-4 type polyvinyl chloride resin is fully swollen, add the preheated and dried organic modifier as CH 3 (CH 2 ) 17 NH 3 + Organically modified montmorillonite, calcium-zinc composite stabilizer and stearic acid, and mixed evenly. The above mixture is prepared into a polyvinyl chloride film through kneading, extruding and blow molding proces...

no. 3 example

[0041] A polyvinyl chloride preservative film is made of the following raw materials in parts by mass,

[0042] SG-4 polyvinyl chloride resin 100 kg;

[0043] Calcium-zinc composite stabilizer 4 kg;

[0044] Stearic acid 0.8 kg;

[0045] Dioctyl phthalate 50 kg;

[0046] The organic modifier is CH 3 (CH 2 ) 17 NH 3 + 1 kg of organically modified montmorillonite.

[0047] First, change the organic modifier to CH 3 (CH 2 ) 17NH 3 + The organically modified montmorillonite was preheated and dried at 80°C for 3 hours to remove the moisture therein. Then, add SG-4 type polyvinyl chloride resin into dioctyl phthalate, when the SG-4 type polyvinyl chloride resin is fully swollen, add the preheated and dried organic modifier as CH 3 (CH 2 ) 17 NH 3 + Organically modified montmorillonite, calcium-zinc composite stabilizer and stearic acid, and mixed evenly. The above mixture is prepared into a polyvinyl chloride film through kneading, extruding and blow molding proce...

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Abstract

The invention discloses a polrvinyl chloride preservative film which is prepared by raw materials in parts by mass as follows: 100 parts of SG-4 polrvinyl chloride resin, 4-6 parts of calcium zinc compound stabilizer, 0.5-1 parts of stearic acid, 45-60 parts of dioctyl phthalate, and 0.5-2 parts of organic modified imvite with an organic modifier which is CH3(CH2)17NH<3+>. The preparation method comprises the steps of: preheating and drying the organic modified imvite for 3 hours at 80 DEG C; adding the SG-4 polrvinyl chloride resin into the dioctyl phthalate; adding the preheated and dried organic modified imvite, the calcium zinc compound stabilizer and the stearic acid and uniformly mixing; preparing a polrvinyl chloride thin film by kneading, extruding and blow moulding steps; and soaking the polrvinyl chloride thin film in n-heptane and drying the polrvinyl chloride thin film to obtain the polrvinyl chloride preservative film. The polrvinyl chloride preservative film prepared by invention can effectively inhibit migration of a plasticizer DOP (Dioctyl Phthalate).

Description

technical field [0001] The invention relates to a fresh-keeping film and a preparation method thereof, in particular to a polyvinyl chloride fresh-keeping film and a preparation method thereof which can effectively inhibit the migration of plasticizer DOP so as to keep its performance unchanged for a long time. Background technique [0002] Existing cling film substrates mainly include polyethylene (PE) and polyvinyl chloride (PVC), among which PVC cling film is relatively more excellent in air permeability, moisture permeability and anti-fog performance. Dioctyl phthalate (DOP) is a plasticizer commonly used in PVC processing. During the use of existing polyvinyl chloride cling film, DOP is easy to migrate, which will cause the polyvinyl chloride cling film to become hard, brittle, and yellow during use and storage, reduce air permeability and moisture permeability, and migrate out The DOP has adverse effects on the surrounding environment and the growth of animals and pla...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08K13/06C08K9/04C08K3/34C08K5/09C08K5/12C08J7/02
Inventor 周永国肖尧刘霞杜林雪王敏
Owner TIANJIN SHENGTIANLI MATERIAL TECH