Application of a longan fresh-keeping paper
A technology of preservative paper and longan, applied in the application, fruit and vegetable preservation, food preservation and other directions, can solve the problems of decreased capacity, increased residues, intensified browning reaction, etc., to extend storage and transportation period and shelf life, prolong storage and transportation and shelf life, the effect of improving market acceptance
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Embodiment 1
[0030] The preparation process of the fresh-keeping paper is as follows: the first layer is ordinary non-woven fabric, and the second layer of acrylic pressure-sensitive adhesive (thickness is 0.01mm) is smeared or sprayed on the first layer. Protect it with special release paper, or spray compound SO immediately 2 Release agent powder (third layer), SO for third layer 2 The release agent powder is made of sodium pyrosulfite as the main release agent and oxalic acid as the release agent (the mass ratio of sodium pyrosulfite to oxalic acid is 1:0.10), mixed and crushed to a size above 200 mesh to make release agent powder, and sprayed evenly on the second layer Top; the fourth layer is made of tea bag non-woven fabric as the sealing material, which is covered on the release agent powder, and pressure is applied, and the sealing material can be bonded to the acrylate through the powder gap. The thickness of the whole fresh-keeping paper is 0.03mm, and the prepared The cling wra...
Embodiment 2
[0032] The experimental method is the same as in Example 1, except that the first layer of the fresh-keeping paper prepared in this embodiment is cotton paper, the second layer is self-adhesive, the third layer uses sodium sulfite as the main release agent, and citric acid It is a release accelerator (the mass ratio of sodium sulfite to citric acid is 1:0.15), and the fourth layer uses environmentally friendly nylon paper as the sealing material. The thickness of the entire fresh-keeping paper is 0.04mm, and the prepared fresh-keeping paper is marked as S2.
Embodiment 3
[0034] The experimental method is the same as in Example 1, except that the first layer of the preservative paper prepared in this embodiment is kraft paper, the second layer is commercially available 3M glue, and the third layer is based on sodium dithionite as the release agent. Malic acid is used as the release agent (the mass ratio of sodium dithionite to malic acid is 1:0.20), the fourth layer is made of vegetable starch paper, and the thickness of the whole fresh-keeping paper is 0.05mm. The prepared fresh-keeping paper marks for S3.
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