Aid low-mobility polyvinyl chloride preservative film

A polyvinyl chloride and polyvinyl chloride resin technology, which is applied in the preservation of fruits and vegetables, food preservation, food science, etc. Changes in friction coefficient, light transmittance, heat sealability, etc., to reduce migration, increase migration resistance, and improve mechanical properties.

Inactive Publication Date: 2011-01-05
TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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AI Technical Summary

Problems solved by technology

[0002] The existing polyvinyl chloride cling film for fruits and vegetables is used after a long time after production. Due to the migration of plasticizers, the technical performance of p

Method used

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Experimental program
Comparison scheme
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Embodiment Construction

[0023] A low-migration vinyl chloride cling film additive formula: 100 parts of polyvinyl chloride resin (SG-4 type), 25-30 parts of dioctyl phthalate (DOP), 15-25 parts of polytrimethylene adipate , 2-5 parts of nano-montmorillonite, 1-2 parts of octadecyl ammonium chloride, 4-6 parts of calcium-zinc composite stabilizer, 0.5-1 part of stearic acid, and 0.5-1 part of paraffin. The above components are formed through the processes of colloid mill homogenization, high-temperature kneading, melt extrusion, blow molding, and traction longitudinal and transverse stretching to make a film of a certain thickness for freshness of fruits and vegetables.

[0024] The main technical feature is that the migration of additives such as DOP is reduced by 10%-70% compared with conventional PVC films, thereby reducing environmental pollution and improving food safety. Polytrimethylene adipate partially replaces the main plasticizer DOP, and when used in combination with DOP, it can effectivel...

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Abstract

The invention discloses an aid low-mobility polyvinyl chloride preservative film formula, which comprises 100 parts of polyvinyl chloride resin (SG-4 type), 25 to 30 parts of dioctyl phthalate (DOP), 15 to 25 parts of polyneopentanediol adipate, 2 to 5 parts of nano montmorillonite, 1 to 2 parts of octadecyl ammonium chloride, 4 to 6 parts of calcium-zinc composite stabilizer, 0.5 to 1 part of stearic acid and 0.5 to 1 part of paraffin. The components are prepared into a film with certain thickness for keeping fruits and vegetables fresh by processes of colloid mill homogenization, high-temperature kneading, melt extrusion, blow molding, traction, longitudinal and transverse stretching and the like. The mobility of the DOP is effectively reduced, the DOP mobility tolerance of the preservative film is increased by adding the organic modified montmorillonite particles, and the preservative film keeps good mechanical property. The aid low-mobility polyvinyl chloride preservative film has the main characteristics of tolerating plasticizer mobility and meeting the national standards on stretching property, tearing property, friction coefficient, light transmittance and thermal sealing property.

Description

technical field [0001] The invention belongs to a fresh-keeping film used for fresh-keeping of fruits and vegetables, in particular to a polyvinyl chloride fresh-keeping film with low migration of additives. Background technique [0002] The existing polyvinyl chloride cling film for fruits and vegetables is used after a long time after production. Due to the migration of plasticizers, the technical performance of polyvinyl chloride cling film decreases, and its stretchability, tearability, friction coefficient, light transmittance, The heat sealing property has changed, which affects its use effect. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a polyvinyl chloride cling film with low migration of additives. Achieve low migration of additives used in polyvinyl chloride cling film, ensuring long-term performance and effect unchanged. [0004] Technical scheme of the present invention is: [0005] A kind of a...

Claims

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Application Information

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IPC IPC(8): C08L27/06C08L67/02C08K13/06C08K9/04C08K3/34C08K5/12C08K5/09A23B7/00
Inventor 李喜宏肖尧王彪鞠晓峰
Owner TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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