Method for producing foaming and cushioning material from wheat straw pulp screen residues

A buffer material and wheat straw pulp technology, which is applied in the field of wheat straw pulp screening residues to produce foam buffer materials, can solve the problems of insufficient use of chemical foamed plastics, refractory degradation, large pulp residue output, etc., and achieves low apparent density, easy to use The effect of degradation and low production cost

Inactive Publication Date: 2013-01-23
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems that the pulping residues produced by pulping are large in output, cannot be fully utilized, and chemically foamed plastics are difficult to degrade, the present invention provides a method for utilizing pulp residues, that is, a method for producing foamed cushioning materials by utilizing screening residues of wheat straw pulp. The method uses the sieve residue of wheat straw pulp as raw material, effectively recycles the sieve residue, and the obtained foam buffer material can be degraded and will not pollute the environment

Method used

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  • Method for producing foaming and cushioning material from wheat straw pulp screen residues
  • Method for producing foaming and cushioning material from wheat straw pulp screen residues

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Using wheat straw pulp sieve residue from a paper mill in Shandong to produce foaming cushioning materials, the steps are as follows:

[0023] 1) The sieve residue of wheat straw pulp is sent to the medium-consistency refiner through the screw conveyor, and is beaten with a light knife, and the beating concentration is 12-15%;

[0024] 2) The beaten slurry is screened by pressure sieve, the aperture of the sieve plate is φ1.8-2.2mm, and the concentration of the slurry after screening is between 1.0-2.0%;

[0025] 3) The sieved slurry is concentrated to a dryness of 38% by a screw press to obtain component A;

[0026] 4) Put component A into the kneader, and then add corn carboxymethyl starch (degree of substitution: 0.1~0.2) binder, NaHCO 3 , (NH 4 ) 2 CO 3 and NH 4 HCO 3 Mix foaming agent, borax, monoglyceride stearate and silicone emulsion, mix thoroughly and evenly to obtain component B, the solid content of component B is 30wt%, control the temperature at roo...

Embodiment 2

[0029] 1) The wheat straw pulp sieve and beating, screening and concentration methods adopted are the same as in Example 1,

[0030] 2) Add component A into the kneader, respectively add corn carboxymethyl starch (degree of substitution: 0.1~0.2) binder, NaHCO 3 , (NH 4 ) 2 CO 3 and NH 4 HCO 3 Mix foaming agent, borax, monoglyceride stearate and silicone emulsion, mix well and evenly to obtain component B, the solid content of component B is 30wt%, control the temperature to normal temperature, pour component B into the mold The used corn carboxymethyl starch consumption is 20% of component A, and the consumption of whipping agent is 12% of component A, wherein, NaHCO 3 , (NH 4 ) 2 CO 3 and NH 4 HCO 3 1.5%, 3.5% and 7% of the absolute dry weight of component A respectively, the consumption of monoglyceride stearate is 1% of component A, the consumption of borax is 1% of component A, the consumption of silicone emulsion 0.05% of component A;

[0031] 3) Foaming is...

Embodiment 3

[0033] 1) The wheat straw pulp sieve and beating, screening and concentration methods adopted are the same as in Example 1,

[0034] 2) Add component A into the kneader, add corn carboxymethyl starch (degree of substitution: 0.1-0.2) binder, NaHCO 3 , (NH 4 ) 2 CO 3 and NH 4 HCO 3 Mix the foaming agent, borax, stearic acid monoglyceride and silicone emulsion, fully mix to obtain component B, the solid content of component B is 30wt%, control the temperature to be normal temperature, and pour component B into the mold ; The consumption of corn carboxymethyl starch is 20% of component A, and the consumption of foaming agent is 12% of component A, wherein NaHCO 3 , (NH 4 ) 2 CO 3 and NH 4 HCO 3 They are 1.5%, 3.5% and 7% of the absolute dry mass of component A, the amount of stearic acid monoglyceride is 1% of component A, the amount of borax is 1% of component A, and the amount of silicone emulsion 0.05% of component A;

[0035] 3) Foam in a microwave or infrared dry...

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Abstract

The invention discloses a method for producing a foaming and cushioning material from wheat straw pulp screen residues, which comprises the following steps: adding wheat straw pulp screen residues into a pulp grinder, and pulping to disperse fiber bundles in the screen residues into individual fibers; after pulping, screening out fiber bundles greater than 2.2mm from the pulp, and concentrating the pulp to a dryness of 35-42%, thus obtaining a component A; uniformly mixing the component A with adhesive, foaming agent, crosslinking agent, lubricating agent and mold release agent; injecting into a mold, and foaming at 150-180 DEG C; and after the foaming process is finished and the material is set to a certain shape, cooling to 120-140 DEG C to dry, and then demolding to obtain the foaming and cushioning material. The method is simple, and the screen residues obtained from the pulping process can be fully used, thereby solving the problem of waste in paper-making production; and the obtained foaming material has low apparent density and high compression strength, and can be easily degraded, thereby reducing the environment pollution and having better economic and social benefits.

Description

technical field [0001] The invention relates to a comprehensive utilization method of wheat straw pulp sieve residue, in particular to a method for producing foaming buffer material from wheat straw pulp sieve residue. Background technique [0002] The plant fiber raw material is a cheap renewable resource, can be used repeatedly, and will degrade after use without causing pollution problems, and can also be recycled. my country is a big country for pulping non-wood fiber raw materials. The annual output of non-wood fiber pulp (mainly wheat straw pulp) is about 17 million tons, and the raw material needs are about 42 million tons. Calculated according to the pulping ratio of 2% (for raw materials), pulping The slurry residue produced in the process is about 840,000 tons. These pulp residues are mainly undistilled fiber bundles and grass knots, with high content of miscellaneous cells. Even if they are steamed again, their strength is also low, so they have to be burned or dr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L97/02C08L3/08C08K3/38C08K5/103C08J9/08
Inventor 王代启赵传山吴朝军于冬梅
Owner QILU UNIV OF TECH
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