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Antibacterial degradable plastic pencil outer skin material and preparation method thereof

A technology for degrading plastics and outer skins is applied in the field of outer skin materials of antibacterial and degradable plastic pencils, and can solve the problems of non-degradation of the outer skins of plastic pencils, discoloration, health and safety, easy generation of mildew spots, etc. Smooth surface and good toughness

Pending Publication Date: 2021-03-12
ANHUI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the deficiencies in the prior art, the object of the present invention is to provide an antibacterial and degradable plastic pencil outer skin material, which aims to solve the problems that the existing plastic pencil outer skin is not easy to degrade and easy to produce mildew, discoloration and poor health and safety. question

Method used

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  • Antibacterial degradable plastic pencil outer skin material and preparation method thereof
  • Antibacterial degradable plastic pencil outer skin material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0025] The present embodiment provides a kind of antibacterial and degradable plastic pencil skin, which comprises the following components in parts by weight: 60 parts of PBAT, 14 parts of cornstarch, 6 parts of glycerin, 2 parts of ethylene-vinyl alcohol copolymer EVOH, and 5 parts of antibacterial masterbatch , 1 part of hydrogenated palm oil, 1 part of masterbatch, 0.1 part of dispersant EBS.

[0026] The antibacterial master batch includes the following components in parts by weight: 80 parts of PBAT, nano-TiO 2 5 parts, 5 parts of nano ZnO, 2 parts of potassium sorbate, 0.1 part of dispersant EBS.

[0027] The preparation method of the antibacterial masterbatch is as follows: put PBAT into an electric blast drying oven for drying treatment, the temperature is 80°C, and the time is 2 hours to obtain dry PBAT; Mixer with a speed of 4000 rpm. After mixing for 10 minutes, take it out and add it to the extruder for extrusion. The screw speed is controlled at 30 rpm and the t...

Embodiment 2

[0035] An antibacterial and degradable plastic pencil skin material, comprising the following components in parts by weight: 60 parts of PBAT, 28 parts of corn starch, 12 parts of glycerin, 5 parts of EVOH, 6 parts of antibacterial masterbatch, 5 parts of hydrogenated palm oil, color masterbatch 2 parts of granules, 0.5 parts of dispersant EBS;

[0036] The antibacterial masterbatch comprises the following components in parts by weight: 80 parts of PBAT, nano TiO 2 5 parts, nano ZnO 10 parts, potassium sorbate 5 parts, dispersant EBS 0.5 parts.

[0037] The preparation method is the same as in Example 1.

Embodiment 3

[0039] An antibacterial and degradable plastic pencil skin material, comprising the following components in parts by weight: 70 parts of PBAT, 21 parts of cornstarch, 9 parts of glycerin, 2 parts of EVOH, 7 parts of antibacterial masterbatch, 2 parts of hydrogenated palm oil, color masterbatch 1.5 parts of granules, 0.3 parts of dispersant EBS;

[0040] The antibacterial masterbatch comprises the following components in parts by weight: 80 parts of PBAT, nano TiO 2 8 parts, nano ZnO 6 parts, potassium sorbate 3 parts, dispersant EBS 0.3 parts.

[0041] The preparation method is the same as in Example 1.

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Abstract

The invention belongs to the technical field of processing of plastic pencils, and particularly relates to an antibacterial degradable plastic pencil outer skin material and a preparation method thereof. The antibacterial degradable plastic pencil outer skin material is prepared from, by weight, 60-80 parts of poly(butyleneadipate-co-terephthalate) (PBAT), 14-28 parts of starch, 2-5 parts of EVOH,6-12 parts of glycerinum, 1-2 parts of color masterbatch, 1-5 parts of hydrogenated palm oil, 5-7 parts of antibacterial masterbatch and 0.1-0.5 part of dispersing agent. The outer skin of the pencilis smooth and easy to roll and sharpen; the added degradable plastic can provide good toughness for the surface material, is more beneficial to the environment, and can be spontaneously degraded in anatural state; the added antibacterial master batch can also remarkably improve the antibacterial effect of the pencil skin, mildew spots and discoloration caused by biological erosion during use areavoided, and the overall tidiness, attractiveness and safety of the pencil are improved.

Description

technical field [0001] The invention belongs to the technical field of processing plastic pencils, and in particular relates to an antibacterial and degradable outer skin material of plastic pencils. Background technique [0002] Pencil is an indispensable drawing and writing tool for people. Since we were children, pencil has occupied a large part of our learning and life. Traditional pencils are mainly made of two pieces of wood wrapped with a graphite core, bonded together with an adhesive, and finally painted with a layer of paint. The pencils produced by this method will cause a large amount of waste of wood resources, which does not meet the development concept of green environmental protection, and when wooden pencils are used for a long time, they are easy to breed bacteria and produce mildew, and the existence of paint will also have an impact on children's health. However, the outer skins of the current mainstream plastic pencils all contain some additives harmful...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L3/02C08L23/08C08L91/00C08K5/053C08K3/22C08K5/098C08K13/02
CPCC08L67/02C08K2201/011C08K2003/2241C08K2003/2296C08L2201/06C08L2205/035C08L3/02C08L23/0861C08L91/00C08K5/053C08K3/22C08K5/098C08K13/02
Inventor 王周锋胡俊伟李春霞丁陶国丁国新程国君万祥龙高俊珊
Owner ANHUI UNIV OF SCI & TECH