Method for making package materials from straws

A packaging material and straw technology, which is applied in manufacturing tools, wood processing equipment, reed/straw processing, etc., can solve the problems of environmental pollution and high manufacturing cost, and achieve the effect of reducing energy consumption and improving pulp quality

Inactive Publication Date: 2011-03-23
LUOYANG INST OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solve the problems of environmental pollution and high manufacturing cost of traditional papermaking process, achieve the purpose of water saving and waste utilization, and realize clean production

Method used

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  • Method for making package materials from straws
  • Method for making package materials from straws
  • Method for making package materials from straws

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] In this embodiment, corn stalks are used as the main raw material, and sodium hydroxide is used as the activator, and the sodium hydroxide accounts for 9.0% of the mass of the dry stalks. The corn stalks are separated from the husks and husks with a corn stalk husk and husk separator, and the outer husks of the corn stalks are crushed to a length of 3 cm, and air-dried to a moisture content of about 10%. When pre-soaking at room temperature at 25°C, the concentration of sodium hydroxide is 1.5%, the solid-liquid ratio is 1:6, and the pre-soaking is for 2 hours; after pre-soaking, filter out 50% of the water, and steam for 45 minutes at 100°C; The final straw is filtered with a filter press, and the waste liquid is reused as the presoak liquid for the next round of activation; after that, the straw is washed and filtered for 3-4 times, and the washing liquid is collected separately. - 2 washes as presoak for next round of activation, 3-4 washes as next round of washes. ...

Embodiment 2

[0026] In this embodiment, corn stalks are used as the main raw material, and sodium hydroxide is used as the activator, and the sodium hydroxide accounts for 12.0% of the dry straw mass. Corn stalks are crushed to a length of 4 cm. When presoaked at room temperature, the concentration of sodium hydroxide is 1.7%, the solid-to-liquid ratio is 1:7, and presoaked for 2 hours; after presoaking, filter out 50% of the water and steam at 100 ° C Raise for 1 hour; the steamed straw is filtered with a filter press, and the waste liquid is reused as the presoak liquid for the next round of activation; after that, the straw is washed and filtered for 3-4 times, washing The liquids were collected separately, the 1st-2nd washing liquid was used as the presoak liquid for the next round of activation, and the 3rd-4th washing liquid was used as the next round of washing liquid. The straw after chemical pretreatment is ground with a high-concentration disc mill; the ground pulp is formed on a...

Embodiment 3

[0028]In this embodiment, corn stalks are used as the main raw material, potassium hydroxide is used as an activator, and potassium hydroxide accounts for 9.0% of the dry straw mass. Corn stalks are crushed to a length of 4 cm. When presoaked at room temperature, the concentration of sodium hydroxide is 1.5%, the solid-to-liquid ratio is 1:6, and presoaked for 2 hours; after presoaking, filter out 50% of the water and steam at 100 ° C Raise for 1 hour; the steamed straw is filtered with a filter press, and the waste liquid is reused as the pre-soaking for the next round of activation; after that, the straw is washed and filtered for 3-4 times, and the washing liquid Collected separately, the 1st-2nd washing solution is used as the presoak solution for the next round of activation, and the 3rd-4th washing solution is used as the next round of washing solution. The straw after chemical pretreatment is ground with a high-concentration disc mill; the ground pulp is formed on a pap...

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Abstract

The invention discloses a method for making package materials from straws, which is characterized in that corn straws and alkali liquor activating agents are used as major raw materials, and a method of combining chemical pre-treatment with mechanical pulp grinding is adopted for producing the package materials, wherein the chemical pre-treatment adopts a method of combining the corn straw soaking by the alkali liquor activating agents with the heating steaming maintenance, the concentration of soaking liquid is 1.5 to 2.0 percent, the solid-liquid ratio is 1 / 6 to 1 / 7, the soaking time is 1 to 2h, 50 percent of water is filtered out after the pre-soaking, the steaming maintenance is carried out at a temperature between 90 and 120 DEG C, the heat insulation time is between 45 and 120min; the straws subjected to the steaming maintenance are filtered by a filter press, waste liquid is reused as the pre-soaking liquid of a next activation process, then, the straws are subjected to 3 to 4 times of washing and press filtering circulation, the washing liquid is respectively collected, the washing liquid in the first time and the washing liquid in the second time are used as pre-soaking liquid of a next activation process, the washing liquid in the third time and the washing liquid in the fourth time are used as washing liquid of a next process; and the straws subjected to the chemical pre-treatment are ground by a high-concentration disc grinding machine, and ground pulp is formed on a paper forming device. The invention achieves the goals of water saving and waste utilization, and realizes the clean production.

Description

technical field [0001] The invention belongs to the technical field of packaging materials, and mainly relates to a method for making packaging materials with straws. Background technique [0002] my country's annual output of straw reaches 640 million tons, including 170 million tons of corn straw. At present, 42% of corn stalks are returned to the field directly or through the stomach, 30% are used as agricultural fuel, 8% are used for industrial or other purposes, and the remaining 20% ​​have not been utilized. [0003] my country lacks wood resources, and agricultural waste straw has always been an important raw material for the paper industry. The high energy consumption caused by traditional mechanical pulping and the environmental pollution caused by chemical pulping have prompted papermakers to continue to try new clean pulping methods. Biopulping has attracted the attention of many researchers due to its environmental friendliness, but this method often requires a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27K9/00
Inventor 张新爱张小军关润伶张俊红熊飞陈冬梅袁媛刘龙
Owner LUOYANG INST OF SCI & TECH
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