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Surface sizing agent as well as preparation method and application thereof

A technology of surface sizing agent and antifungal agent, applied in the direction of water repellent addition, transportation and packaging, flexible coverings, etc., can solve the problems of high ink absorption, insufficient base paper strength, and printing fading, etc., to achieve success Good film properties, low cost, good binding effect

Inactive Publication Date: 2018-01-19
CHANGDE JINDE NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, surface sizing agent products are mainly developed for the surface strength, water resistance, and printing adaptability of paper, and are used to make up for the insufficient strength of base paper caused by poor pulp quality, and the loss of lint and powder during printing. Paper has problems such as high ink absorption and blurring of printing, but there are few researches on packaging paper for fruit and vegetable preservation.

Method used

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  • Surface sizing agent as well as preparation method and application thereof
  • Surface sizing agent as well as preparation method and application thereof
  • Surface sizing agent as well as preparation method and application thereof

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preparation example Construction

[0050] One embodiment of the present application provides a method for preparing the above-mentioned surface sizing agent, including the following steps S001-S003:

[0051] S001: Mix the main component, the hydrophilic resin and the water to obtain a first mixed liquid.

[0052] Specifically, the main component is dissolved in an appropriate amount of water, the hydrophilic resin is dissolved in the remaining water, and their solutions are mixed and stirred evenly to obtain the first mixed solution.

[0053] In one embodiment, the condition for dissolving the main component starch in water in step S001 is gelatinization at 63°C-68°C.

[0054] By first gelatinizing the starch at a suitable temperature, the uniform blending of the starch and the hydrophilic resin is facilitated.

[0055] S002: Add the auxiliary agent into the first mixed liquid under stirring, raise the temperature to 90°C-95°C, stir and react at 1000r / min-1200r / min for 2h-4h, and obtain the second mixed liquid...

Embodiment 1

[0065] Raw materials are provided, including by weight percentage: 22% cornstarch, 8% polyvinyl alcohol 1788, 6% antifungal agent (specifically 3% sodium diacetate, 1.5% carson, 1% methylparaben and 0.5 % potassium sorbate), 5% ethylene absorbent, 1% Span-80, 60% water, wherein the carrier of ethylene absorbent includes 60% zeolite, 30% diatomite and 10% bentonite, the ethylene absorbent The weight ratio of potassium permanganate to silver chloride in the active ingredient is 9:1.

[0066] Add cornstarch to 40% water, heat to 65°C, stir until it is completely gelatinized, add polyvinyl alcohol 1788 to 20% water, stir for 30 minutes, then mix the cornstarch gelatinized liquid and polyvinyl alcohol aqueous solution, Stir evenly to obtain the first mixed solution.

[0067] Add Span-80 dropwise to the above first mixed solution under stirring, heat up to 90°C-95°C, stir and react at 1000r / min for 3h to obtain the second mixed solution.

[0068] When the temperature of the second...

Embodiment 2

[0071] Provide raw materials, including by weight percentage: 30% corn starch, 5% polyvinyl alcohol 1788, 3% sodium diacetate, 3% methylparaben, 6% ethylene absorbent, 2% Span-80 and 51 % water, wherein the carrier of the ethylene absorbent includes 60% zeolite, 30% diatomaceous earth and 10% bentonite, and the weight ratio of potassium permanganate to silver chloride in the active ingredient of the ethylene absorbent is 8:1.

[0072] Add cornstarch to 40% water, heat to 65°C, stir until completely gelatinized, add polyvinyl alcohol 1788 to 11% water, stir for 30 minutes, then mix starch gelatinized liquid and polyvinyl alcohol aqueous solution, Stir evenly to obtain the first mixed solution.

[0073] Add Span-80 dropwise to the above mixed solution under stirring, heat up to 90°C-95°C, stir and react at 1200r / min for 3h to obtain the second mixed solution.

[0074] When the temperature of the second mixed solution is lowered to 60°C, add the ethylene absorbent dropwise under...

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Abstract

The invention relates to a surface sizing agent as well as a preparation method and application thereof. The surface sizing agent is prepared from the following raw materials and components in percentage by weight: 20% to 40% of main component, 3% to 15% of hydrophilic resin, 2% to 12% of mildew-proof agent, 1% to 6% of ethylene absorbent, 0.5% to 2% of additive, and 50% to 70% of water, wherein the main component is selected from one or multiple of rosin, gelatin and starch; the ethylene adsorbent is a carrier loaded with active ingredient, and the active ingredient is selected from at leastone of potassium permanganate, calcium peroxide and silver chloride. The surface sizing agent has the advantages that the bonding force with fiber is good, the surface sizing agent can be applied to the surface of paper to form a dense film, and the paper has certain water-retaining property; the surface sizing agent is especially suitable for the packaging and fresh-keeping of fruits and vegetables, the functions of inhibiting bacteria and preventing mildew, reducing concentration of ethylene in package, and avoiding water loss of fruits and vegetables are realized, and the fresh-keeping period of the fruits and vegetables is extended; while the dense film is formed at the surface of the paper, the toughness and surface strength of the paper are improved.

Description

technical field [0001] The invention relates to the technical field of freshness preservation, in particular to a surface sizing agent and a preparation method and application thereof. Background technique [0002] Fruits and vegetables are the second largest category of agricultural products after food crops, and are important foods in people's lives. Fruits and vegetables are extremely perishable during the storage and transportation process after harvesting, and the annual loss of fruits and vegetables caused by this is quite huge. Therefore, it is very important to take fresh-keeping measures for fruits and vegetables. [0003] At present, there are two main types of fresh-keeping methods for fruits and vegetables: physical methods and chemical methods. Physical fresh-keeping methods mainly adopt low-temperature storage, artificial controlled atmosphere storage, decompression storage and electromagnetic radiation storage. Although these physical storage and fresh-keepi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H27/10D21H21/16
Inventor 余赞钟文田璐张勇军韦雪雪罗臻杜建军
Owner CHANGDE JINDE NEW MATERIAL TECH CO LTD
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