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Polymer plastic for processing plastic pencil holder

A technology of polymer and pencil shaft, which is applied in the direction of pen shaft, non-active pencil, printing, etc., can solve the problems of reducing the aesthetics of plastic pencil curling surface, imperfect appearance of plastic pencil, uneven cells, etc. Improves cleanliness and aesthetics, and facilitates curling

Inactive Publication Date: 2020-02-14
安徽得亿文教用品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, Chinese invention patents CN108997677A and CN1204008C all adopt the method of foaming the plastic pen holder to reduce the resistance of the plastic pen holder to curling. The appearance of plastic pencils is not perfect, and after foaming treatment, the curling surface of plastic pencils has a large number of pores, which will absorb a lot of dust and stains. Dust and stains will adhere to the pores and are not easy to remove, thus reducing the plastic pencil. Aesthetics of curled surface

Method used

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  • Polymer plastic for processing plastic pencil holder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A polymer plastic used for processing plastic pencil shafts, the specific preparation method is as follows:

[0022] 1) Add chitosan, isopropanol, sodium hydroxide solution and chloroacetic acid into the reactor in sequence, heat up to 50°C, and react for 8 hours. After the reaction is completed, continue to add sodium hydroxide solution and Triethyl-p-nitrobenzyl ammonium chloride, heat up to 65°C, continue to react for 6 hours, then wash with ethanol and isopropanol repeatedly for 3 times, and then use hydrochloric acid to adjust the product to be neutral, and the modified chitosan can be obtained ;

[0023] 2) Add polyvinyl alcohol, modified chitosan, glacial acetic acid and glutaraldehyde to the nano-titanium dioxide dispersion in sequence, stir for 40 minutes in a water bath at 50°C, and rotate at a speed of 150r / min. Dry at ℃ for 8 hours to obtain nano-titanium dioxide / modified chitosan composite, take graphene oxide and add it to deionized water, mix and stir to...

Embodiment 2

[0033] A polymer plastic used for processing plastic pencil shafts, the specific preparation method is as follows:

[0034] 1) Add chitosan, isopropanol, sodium hydroxide solution and chloroacetic acid into the reactor in sequence, heat up to 55°C, react for 7 hours, and continue to add sodium hydroxide solution and Triethyl-p-nitrobenzyl ammonium chloride, heat up to 70°C, continue to react for 5 hours, then wash repeatedly with ethanol and isopropanol for 4 times, and then use hydrochloric acid to adjust the product to be neutral to obtain modified chitosan ;

[0035] 2) Add polyvinyl alcohol, modified chitosan, glacial acetic acid and glutaraldehyde to the nano-titanium dioxide dispersion in turn, stir in a water bath at 55°C for 35min at a speed of 180r / min, and put the product at 65 Dry at ℃ for 7 hours to obtain nano-titanium dioxide / modified chitosan composite, take graphene oxide and add it to deionized water, mix and stir to obtain a graphene oxide dispersion with a ...

Embodiment 3

[0045] A polymer plastic used for processing plastic pencil shafts, the specific preparation method is as follows:

[0046] 1) Add chitosan, isopropanol, sodium hydroxide solution and chloroacetic acid into the reactor in sequence, heat up to 60°C, react for 6 hours, and continue to add sodium hydroxide solution and Triethyl-p-nitrobenzyl ammonium chloride, heat up to 75°C, continue to react for 4 hours, then wash repeatedly with ethanol and isopropanol for 5 times, and then use hydrochloric acid to adjust the product to be neutral to obtain modified chitosan ;

[0047] 2) Add polyvinyl alcohol, modified chitosan, glacial acetic acid and glutaraldehyde to the nano-titanium dioxide dispersion in turn, stir in a water bath at 60°C for 30min at a speed of 200r / min, and put the product at 70 Dry at ℃ for 5 hours to obtain the nano-titanium dioxide / modified chitosan composite, take graphene oxide and add it to deionized water, mix and stir to prepare a graphene oxide dispersion wi...

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Abstract

Polymer plastic for processing a plastic pencil holder is disclosed. The polymer plastic is specifically prepared by the following steps: 1) modifying chitosan to obtain modified chitosan; 2) preparing a nano titanium dioxide / modified chitosan composite from the modified chitosan and nano titanium dioxide, and then adding graphene oxide to prepare a graphene oxide / nano titanium dioxide / modified chitosan composite; 3) preparing polylactic acid porous microspheres; 4) preparing porous composite microspheres from the porous microspheres and the composite in the step 2); and 5) stirring the porouscomposite microspheres and raw materials to obtain a mixture, putting the mixture into an extruder, and carrying out extrusion granulation to obtain the polymer plastic. When the polymer plastic is used as a raw material for preparing a plastic pencil holder, the sharpening resistance of a plastic pencil can be effectively reduced, the plastic pencil is easy to sharpen, and the compact structureof a sharpening surface can be kept, so that the sharpening surface is not easily contaminated by stains, and cleanliness and attractiveness of the plastic pencil are improved.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a polymer plastic used for processing plastic pencil shafts. Background technique [0002] The traditional pencil holder is mainly made of wood, but this method has higher requirements on wood. Only effective tree species such as red cedar, cedar, sida, basswood and kai wood can be applied, not only It seriously restricts its application and development, and it is easy to cause waste of resources, which does not meet the current requirements for environmental protection. Based on this, plastic pen holders have been widely used and developed instead of wood pen holders. Plastic pen holders can not only solve the waste of wood resources, meet the requirements of environmental protection, but also have low cost and high economic benefits. [0003] But existing plastic penholder, its curling resistance is big, especially under the special occasion that children...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L27/06C08L67/04C08K13/06C08K9/10C08K3/22C08K3/04C08B37/08C08J9/28B43K19/02B43K3/00
CPCB43K3/00B43K19/02C08B37/003C08J9/286C08J2201/0522C08J2367/04C08K2003/2241C08K2201/011C08L23/12C08L2205/20C08L27/06C08L67/04C08K13/06C08K9/10C08K3/22C08K3/042
Inventor 张育玮张枫杨勇
Owner 安徽得亿文教用品有限公司
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