Method for inhibiting migration of plasticizer in PVC (Polyvinyl Chloride) preservative film
A technology of plastic wrap and plasticizer, which is applied in the application field of food contact materials, can solve the problems of raw material cost, expensive equipment, complicated operation, etc., and achieve the effects of low cost, migration inhibition, and simple operation
Inactive Publication Date: 2018-03-30
SHANDONG AGRICULTURAL UNIVERSITY
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The purpose is to overcome the defects of raw material cost, complicated operation and expensive equipment in the existing method
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0017] Below in conjunction with embodiment, the present invention is further described; Following embodiment is illustrative, not limiting, can not limit protection scope of the present invention with following embodiment.
[0018] In the invention, the preservative film is soaked in an organic solvent for a short time to achieve the purpose of inhibiting the plasticizer from migrating into the packaged food. Its specific embodiment is:
[0019] 1. A certain size of PVC plastic wrap is placed in an airtight container, according to 150mL / dm 2 Add 40% (volume ratio of ethanol to water) ethanol-water mixed solution to the ratio (the ratio of ethanol-water mixed solution and PVC plastic wrap), seal; soak for 10 minutes under 40°C.
[0020] 2. Dry the soaked plastic wrap at 60°C for 5 minutes, and the processed plastic wrap is used for food preservation.
[0021] 3. Take fresh pork with a flat surface, spread the treated plastic wrap on the surface of the pork, and store it at r...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to a method for inhibiting migration of a plasticizer in a PVC (Polyvinyl Chloride) preservative film. The method comprises the steps of putting the PVC preservative film into asealed container, adding the PVC preservative film and an ethyl alcohol water mixed solution into the ethyl alcohol water mixed solution according to the proportion of 100 to 180mL / dm<2>, and soakingat 20 to 50 DEG C for 5 to 15 minutes, wherein the volume ratio of ethyl alcohol and water in the ethyl alcohol water mixed solution is 40 percent to 90 percent; drying the soaked PVC preservative film for 5 to 30 minutes at 60 DEG C. According to the method for inhibiting migration of the plasticizer in the PVC preservative film provided by the invention, the ethyl alcohol water mixed solution isadopted as a medium, soaking treatment is carried out at a certain temperature, and plasticizer molecules are hindered to migrate outwards, so that the aim of inhibiting migration into packaging foodis achieved, and meanwhile, the mechanical strength, the transparency, the cold resistance and other performances of the film material can be maintained. The method provided by the invention is low in raw material cost, does not need an expensive device, is simple and time-saving in operation, and can be widely applied to preventing the plasticizers in various food contact materials from migrating into agricultural products and food.
Description
[0001] Invention name [0002] The invention relates to a method for inhibiting migration of plasticizers in PVC fresh-keeping films, belonging to the application field of food contact materials. Background technique [0003] Polyvinyl chloride polymer (PVC for short) is a thermoplastic resin formed by polymerization of vinyl chloride monomer under the action of an initiator. The molecular formula is -[CH 2 -CHCl]- n . Due to the characteristics of good flexibility, high transparency and cold resistance, PVC cling film is widely used in the preservation of fruits, vegetables and meat products in supermarkets and homes. However, the force between PVC molecular chains is strong, and PVC products are hard, so a large amount of plasticizers, especially phthalate plasticizers, have to be added to improve the toughness and softness of PVC cling film. Phthalates are a class of environmental hormones that can cause damage to the liver, urinary system, and endocrine system. Althoug...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/02
CPCC08J7/02C08J2327/06
Inventor 徐志祥赵鹏焦逊
Owner SHANDONG AGRICULTURAL UNIVERSITY