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Blackboard panel and producing method thereof

A blackboard and board surface technology, which is applied to the blackboard surface and its production field, can solve the problems of fragility of frosted glass, slippery steel plate, luminescence, etc., and achieves the effect of reducing production cost, suitable for popularization and application, and simple process.

Inactive Publication Date: 2008-05-28
李泉堂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of the frosted glass being fragile, relatively heavy, poor contrast, and the steel plate is easy to slip, luminous, and high cost, the invention provides a blackboard surface whose base material is polyvinyl chloride or polypropylene and its production method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The base material is polyvinyl chloride, the auxiliary material is corundum, polyvinyl chloride: corundum: pigment weight ratio is 1: 0.2: 0.01, get 8Kg of polyvinyl chloride, 1.6Kg of 200 mesh corundum, and 0.08Kg of pigments at room temperature Put it into a mixer and mix evenly; then heat it to 60°C; roll the heated raw material into a blackboard surface through a tube filled with 0°C flowing water.

[0022] The weight of the blackboard surface is 9.68Kg, and the cost is about 70 yuan.

[0023] Calculated by wiping 15 times a day, the blackboard surface made by the present invention can be wiped about 50,000 times.

Embodiment 2

[0025] The base material is polypropylene, and the auxiliary material is talcum powder. The weight ratio of polypropylene:talc powder:pigment is 1:3:0.1. Take 5Kg of polypropylene, 15Kg of talc powder, and 0.5Kg of pigment, and put them into the mixer in turn at room temperature. Mix evenly; then heat to 80°C; roll the heated raw materials into a blackboard surface through a tube filled with 4°C flowing water.

[0026] The weight of the blackboard surface is 20.5Kg, and the cost is about 50 yuan.

[0027] Calculated by wiping 15 times a day, the blackboard surface made by the present invention can be wiped about 30,000 times.

Embodiment 3

[0029] The base material is polyvinyl chloride, and the auxiliary material is iron powder. The weight ratio of polyvinyl chloride: iron powder: pigment is 1: 1.5: 0.05. Get 6Kg of polyvinyl chloride, 9Kg of 250-mesh iron powder, and 0.3Kg of pigment at room temperature. Put them into the mixer in turn and mix evenly; then heat to 65°C; roll the heated raw materials into a blackboard surface through a tube filled with 2°C flowing water.

[0030] The weight of the blackboard surface is 15.3Kg, and the cost is about 70 yuan.

[0031] Calculated by wiping 15 times a day, the blackboard surface made by the present invention can be wiped about 40,000 times.

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PUM

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Abstract

The invention relates to a blackboard face, which is characterized in that the blackboard face comprises basic substance and findings and the proportion by weight is 1:0.1-3, wherein the basic substance is polychloroethylene or polyproethene, the findings are at least one of carborundum, iron powder and french chalk. The invention also comprises pigment, so that blackboard face is made into different colors according to the need. The another purpose of the invention is to provide a process for making the blackboard face, and the process includes the following operating steps: basic substance and findings are charged in commingler sequentially at room temperature, mixed equally, heated to 60 DEGC to 80 DEGC, and then raw material heated is compressed into blackboard face through rolling pipe body filled with flowing water of 0 DEG C to 4 DEG C. The invention has the advantages of easy writing, no reflecting, no slipping, overcoming the defect of no easy breaking, low weight, light and beauty, which is provided with steel boards, overcoming the defect of no easy abrasion, simple technique of producing blackboard face, and proper popularization and application.

Description

(1) Technical field [0001] The invention relates to the technical field of teaching tools, in particular to a blackboard surface whose base is polyvinyl chloride or polypropylene and a production method thereof. (2) Background technology [0002] The surface of the traditional blackboard is made of a wooden board, painted with gypsum dust and then painted with raw lacquer, or painted with black paint on the back of frosted glass. The former requires large wood and expensive raw lacquer, and the surface is easy to wear. Generally, it is painted once a year, so the cost of the blackboard surface is high; the latter is made of frosted glass, which is fragile and relatively heavy. Difference. [0003] In view of the above existing problems, there are currently some places where the steel plate surface is sprayed or handcuffed with a layer of black paint on the galvanized plate. The phenomenon of reflective skidding occurs in Korean-made boards in about 3 years, and in Japanese...

Claims

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Application Information

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IPC IPC(8): C08L27/06C08L23/16C08K3/34B43L1/04
Inventor 李泉堂
Owner 李泉堂
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