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Non-woven fabric based composite fresh-keeping packaging material and preparation method thereof

A composite fresh-keeping, non-woven-based technology, applied in the field of packaging materials, to reduce the weight loss rate and decay rate, inhibit the growth of bacteria, and improve the effect of freshness

Inactive Publication Date: 2018-03-13
ANHUI AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to effectively solve the fresh-keeping problem of fruits and vegetables (mainly such as strawberries and other fruits that are not easy to store), the present invention provides a non-woven fabric-based composite fresh-keeping packaging material and a preparation method thereof, which not only realize the air permeability of fruits but also realize the fresh-keeping properties of fruits

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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  • Non-woven fabric based composite fresh-keeping packaging material and preparation method thereof
  • Non-woven fabric based composite fresh-keeping packaging material and preparation method thereof
  • Non-woven fabric based composite fresh-keeping packaging material and preparation method thereof

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Effect test

preparation example Construction

[0044] A method for preparing a non-woven fabric-based composite fresh-keeping packaging material, comprising the steps of:

[0045] Step 1, using normal temperature plasma to treat the non-woven fabric to promote the surface activation of the non-woven fabric: specifically, the non-woven fabric is soaked in (mass concentration) 95% ethanol, soaked at room temperature for 24-36h, and then treated with distilled water Wash repeatedly, remove the absolute ethanol in the non-woven fabric, and dry it; activate it with a glutaraldehyde solution with a mass concentration of 2.5% for 6-12h, and place it in an O with a vacuum of 30-100Pa at room temperature. 2 In the atmosphere, the plasma is treated for 4-20 minutes under the condition of a power of 50-200W. Plasma treatment of non-woven fabrics at room temperature is convenient and inexpensive, and can effectively trigger the breaking of carbon bonds on the surface of PP-based non-woven fabrics. The new green preservative compounded...

Embodiment 1

[0050] Embodiment 1 to the test of strawberry fresh-keeping performance

[0051] Strawberries were picked from the strawberry base, transported back to the laboratory immediately after picking, and forced to pre-cool for 1 hour with rapid ventilation. Strawberries with the same maturity and size, no mechanical damage, and no pests and diseases were selected as the test fruits. Cut the non-woven fabric-based fresh-keeping packaging composite material into 10cm×20cm samples to make packaging bags, put 5 strawberries in each bag, then seal the bag mouth, and put the packed strawberries into a sealed corrugated box Store at room temperature (20°C) and evaluate the preservation effect. The indicators investigated are soluble solids, Vc content, reducing sugar content, titratable acid content and decay rate. The corresponding test methods are as follows:

[0052] Determination of soluble solids: Take an appropriate amount of strawberry juice and drop it on a hand-held refractometer,...

Embodiment 2

[0065] Embodiment 2 to the test of fresh-keeping performance of green pepper

[0066] The post-harvest green peppers were quickly transported back to the laboratory, and those with pests and diseases and mechanical damage were eliminated, and those with the same appearance, intact fruit shape, full fruit, bright color, uniform color, and moderate maturity were selected for testing. Cut the non-woven fabric-based fresh-keeping packaging composite material into samples with a specification of 10cm×20cm to make packaging bags, randomly fill each portion with 3 green peppers, then seal the bag mouth, and put the packaged green peppers into a sealed corrugated box Store at room temperature (20°C) and evaluate the preservation effect. The indicators investigated are reducing sugar content, Vc content, chlorophyll, decay rate and weight loss rate. The corresponding test methods are as follows:

[0067] Determination of reducing sugar content: Determination by 3,5-dinitrosalicylic aci...

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 belongs to the field of packaging materials, relates to a non-woven fabric based composite fresh-keeping packaging material mainly for storage-intolerant fruits and vegetables, and particularly relates to a non-woven fabric based composite fresh-keeping packaging material and a preparation method thereof. The non-woven fabric based composite fresh-keeping packaging material comprisesnon-woven fabrics and a preservative carried by the non-woven fabrics as a base, and the usage amount of the preservative ensures that the non-woven fabrics is increased in weight by 5%-10%. The non-woven fabric based composite fresh-keeping packaging material realizes air permeability for the fruits and also realizes fresh keeping for the fruits.

Description

technical field [0001] The invention belongs to the field of packaging materials, and relates to a non-woven fabric-based fresh-keeping packaging composite material mainly for fruits and vegetables (especially strawberries) that are not resistant to storage, in particular to a non-woven fabric-based composite fresh-keeping packaging material and a preparation method thereof. Background technique [0002] Strawberry belongs to the genus Strawberry of the family Rosaceae. The fruit is an aggregate fruit with rich nutritional value. It is known as the "Queen of Fruits" and is rich in vitamin C, vitamin A, vitamin E, vitamin PP, vitamin B1, vitamin B2, carotene, Acid, aspartic acid, strawberry amine, pectin, cellulose, folic acid, iron, calcium, ellagic acid and anthocyanins and other nutrients. The water content of strawberry fruit is as high as 90%-95%. Because the fruit skin is thin, the tissue is fragile, the water content is sufficient, it is easy to wilt and be damaged, an...

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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Patent Type & Authority Applications(China)
IPC IPC(8): A23B7/154A23L3/3562A23L3/3499B65D65/42
CPCA23B7/154A23L3/3499A23L3/3562A23V2002/00B65D65/42A23V2200/10A23V2250/022A23V2250/511Y02A40/90
Inventor 张克宏杜兆芳温效凤孔祥娟赵荣荣
Owner ANHUI AGRICULTURAL UNIVERSITY
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