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A kind of active fruit and vegetable fresh-keeping film and preparation method thereof
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A fresh-keeping and active technology for fruits and vegetables, applied in the field of fresh-keeping packaging materials, can solve the problems of short fresh-keeping time and water loss of fruits and vegetables, and achieve the effects of prolonging the fresh-keeping time, inhibiting respiration, and improving the quality of fresh-keeping
Active Publication Date: 2017-10-31
保定恩世包装有限公司
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Abstract
Description
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Problems solved by technology
When the existing fruit and vegetable plastic wrap is used to package fruits and vegetables, the water loss of fruits and vegetables is serious, and the preservation time is short
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
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Embodiment 1
[0018] An active fresh-keeping film for fruits and vegetables, consisting of the following raw materials in parts by weight: 50 parts of poly-3-hydroxybutyrate and polyhydroxyvalerate copolymer, wherein the content of poly-3-hydroxybutyrate is 56.4%; sorbose 1.2 parts of alkyd stearate, 1 part of monoglyceride stearate, 4 parts of zeolite with a particle size of 0.1-0.5um, 1 part of cristobalite with a particle size of 0.1-0.5um, 2 parts of natural activated clay, dilaurel 0.25 parts of dibutyltin acid, 1 part of tea polyphenols, 1 part of carbon black, 4 parts of glycerin.
[0019] Its preparation method is as follows: After weighing each raw material according to the weight part, add them into a high-speed mixer in turn, mix them evenly, and then add them into a plastic extrusion granulator, and the temperature during processing is 135-144°C , to obtain active fresh-keeping film for fruits and vegetables, and then blow the film further.
Embodiment 2
[0021] An active fresh-keeping film for fruits and vegetables, which is composed of the following raw materials in parts by weight: 50 parts of poly-3-hydroxybutyrate and polyhydroxyvalerate copolymer, wherein the content of poly-3-hydroxybutyrate is 55%; sorbose 0.8 parts of alkyd stearate, 2 parts of monoglyceride stearate, 3 parts of zeolite with a particle size of 0.1-0.5um, 2 parts of cristobalite with a particle size of 0.1-0.5um, 1-2 parts of natural activated clay, 0.5 parts of dibutyltin dilaurate, 0.5 parts of tea polyphenols, 2 parts of carbon black, 3 parts of glycerin.
[0022] Its preparation method is with embodiment 1.
Embodiment 3
[0024] An active fresh-keeping film for fruits and vegetables, which consists of the following raw materials in parts by weight: 50 parts of poly-3-hydroxybutyrate and polyhydroxyvalerate copolymer, wherein the content of poly-3-hydroxybutyrate is 58%; sorbose 0.5 parts of alkyd stearate, 3 parts of monoglyceride stearate, 2 parts of zeolite with a particle size of 0.1-0.5um, 2 parts of cristobalite with a particle size of 0.1-0.5um, 1 part of natural activated clay, dilaurel 0.5 parts of dibutyltin acid, 0.5 parts of tea polyphenols, 2 parts of carbon black, 3 parts of glycerin.
[0025] Its preparation method is with embodiment 1.
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
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Abstract
The invention relates to the technical field of fresh keeping packaging materials, in particular to an active fruit and vegetable preservative film and a preparation method thereof. The preservative film is prepared from the following raw materials in parts by weight: 50 parts of poly 3-polyhydroxybutyrate and poly(hydroxybutyrate-co-hydroxyvalerate copolymers, 0.5 to 1.5 parts of sorbitan stearate, 1 to 3 parts of glyceryl monostearate, 2 to 5 parts of zeolite, 0.5 to 2 parts of christobalite, 1 to 3 parts of active natural clay, 0.25 to 0.5 part of dibutyltindilaurate, 0.5 to 1 part of tea polyphenol, 1 to 2 parts of carbon black and 3 to 5 parts of glycerol. The preservative film provided by the invention has the advantages that the air permeability and the temperature resistant performance are good; the fresh keeping time can be effectively prolonged; the fresh keeping quality is improved.
Description
technical field [0001] The invention relates to the technical field of fresh-keeping packaging materials, in particular to an active fruit and vegetable fresh-keeping film and a preparation method thereof. Background technique [0002] It is not easy to keep fruits and vegetables fresh. The respiration of fruits and vegetables will cause the consumption of internal components, soften the meat and reduce the nutritional value; ethylene gas can promote the aging of fruits and vegetables and accelerate the respiration; the water content of fruits and vegetables is as high as 85% to 95%. If the water loss reaches 5 %, the appearance will wilt and reduce the commodity value; if it turns yellow, the VC content will decrease. It can be seen that respiration is the main factor affecting the freshness of fruits and vegetables. In addition, the corrosion of pathogenic microorganisms is another factor that causes the freshness of vegetables to decrease. [0003] Fruit and vegetable p...
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
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Application Information
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