A kind of sticky pencil glue and preparation method thereof

A technology of pencil and sticky core, which is applied in the direction of monocarboxylate copolymer adhesives, adhesive types, non-polymer adhesive additives, etc., and can solve the problems of reduced wood strength, poor water resistance, and poor initial adhesion. , to achieve the effect of increasing curing speed, improving flexibility and improving water resistance

Active Publication Date: 2021-06-18
顶立新材料科技股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At present, the main component of the existing pencil lead glue used in China is polyvinyl acetate adhesive, which has low solid content, high viscosity, and poor water resistance. Polyvinyl acetate adhesive has good adhesion to pencil wood, but it is not suitable for various Insufficient bond strength of refills, especially colored refills
In order to overcome this defect, the current remedy methods generally apply external force to squeeze the pencil lead into the pencil groove to prevent it from slipping, or soften the wood with steam, but this will increase the cost of the pencil wood and reduce the strength of the wood. , resulting in a high defective rate
Due to the poor initial viscosity of polyvinyl acetate, it takes a long time to pressurize during the production process, which prolongs the pencil bonding time and reduces production efficiency.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) raw material takes by weighing: get 85 parts by weight solid content is the VAE emulsion of 50wt%, 10 parts by weight solid content is the polyvinyl acetate emulsion of 40wt%, 20 parts by weight solid content is the vinegar acrylic emulsion of 40wt% (Tg< ~10°C), 10 parts by weight of TXIB, 0.2 parts by weight of American Gas Surfynol 104PG-50 wetting agent, 0.1 parts by weight of mineral oil defoamer, and 0.1 parts by weight of Kathon preservative.

[0021] (2) Stir and mix the above raw materials evenly at room temperature to obtain sticky pencil glue.

Embodiment 2

[0023] (1) raw material takes by weighing: get 50 parts by weight solid content is the VAE emulsion of 57wt%, 20 parts by weight solid content is the polyvinyl acetate emulsion of 60wt%, 50 parts by weight solid content is the vinegar acrylic emulsion of 60wt% (Tg< ~10°C), 8 parts by weight of tributyl citrate, 0.3 parts by weight of dioctyl sodium sulfosuccinate, 0.2 parts by weight of mineral oil defoamer, and 0.2 parts by weight of Kathon preservative.

[0024] (2) Stir and mix the above raw materials evenly at room temperature to obtain sticky pencil glue.

Embodiment 3

[0026] (1) raw material takes by weighing: getting 60 parts by weight solid content is the VAE emulsion of 54wt%, 15 parts by weight solid content is the polyvinyl acetate emulsion of 45wt%, 30 parts by weight solid content is the vinegar acrylic emulsion of 45wt% (Tg< ~10°C), 3 parts by weight of acetyl trioctyl citrate, 0.2 parts by weight of American Gas Surfynol 104PG-50 wetting agent, 0.1 parts by weight of mineral oil defoamer, and 0.2 parts by weight of Kathon preservative.

[0027] (2) Stir and mix the above raw materials evenly at room temperature to obtain sticky pencil glue.

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Abstract

The invention discloses a core-sticking pencil glue and a preparation method thereof, belonging to the technical field of adhesives. The pencil glue comprises: 50-85 parts of VAE, 10-20 parts of polyvinyl acetate emulsion, 20-50 parts Vinegar-acrylic emulsion, 1-10 parts of environmentally friendly plasticizer, 0.2-0.6 part of wetting agent, 0.1-0.2 part of defoamer, 0.1-0.2 part of preservative. The pencil made of the pencil glue can allow the wood flower rolled out of the pencil to stick to the graphite core scraps rolled out of the pencil core, and has high bonding strength and good water resistance; therefore, the present invention The sticky pencil glue described above has broad application prospect and market potential.

Description

technical field [0001] The invention relates to the technical field of adhesives, in particular to a core-adhesive pencil glue and a preparation method thereof. Background technique [0002] Pencil production process: apply the pencil core glue machine to the upper, lower and grooves of the pencil board, then combine the upper and lower (opened) boards, pressurize through the fixture, and enter the back after the glue is cured Cutting, planing, molding, painting and other processes. The main indicators of the water-based pencil lead in the application process are as follows: [0003] (1) Adhesive strength: It is required that the finished pencil should not be cracked when the end of the pencil is stressed. [0004] (2) Water resistance: After soaking in water for 1 hour, it will not crack naturally [0005] (3) Drying speed (curing speed): This characteristic affects the efficiency of pencil production, generally about 4 hours [0006] (4) Sticky core, requiring the penc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J131/04C09J11/06
CPCC08L2205/025C08L2205/03C09J11/06C09J131/04C08L31/04C08K5/103C08K5/11
Inventor 叶鹏金万江彭奕诚周闰阳章伦黄虎叶圣麟
Owner 顶立新材料科技股份有限公司
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