Abrasive-containing eraser

A technology of abrasive materials and erasers, which can be used in erasers, printing, office supplies, etc., can solve the problem of large fluff on the paper surface, achieve high productivity, realize the effect of cost, and reduce the degree of dependence

Inactive Publication Date: 2011-06-22
SEED CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the grinding force is too strong, the erasing performance is good, but the fluff on the paper surface becomes large

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1~11

[0094] Among the materials shown in Table 2, natural rubber, a softener, and a filler were kneaded in advance with a pressure kneader, and a rubber crosslinking agent was added using a roller to obtain a rubber kneaded product. The obtained rubber kneaded material was cut into pellets of about 5 mm square. Next, using a twin-screw extruder KZW-15TW-60 manufactured by Technobel Corporation (complete meshing type in the same direction, screw diameter 15mm, L / D=60), the rubber compound was supplied from a quantitative feeder at the compounding ratio shown in Table 2. The refining granules and biomass plastic granules were mixed under the condition that the screw rotation number was 400rpm. When the biomass plastic is PHBH (melting point 120°C), set the cylinder temperature at 120~160°C so that the kneading temperature is above the melting point and above the rubber crosslinking temperature (150°C), when it is レシチアH When it is -100 (melting point 164°C), set the cylinder temperat...

reference example 1

[0099] Reference example 1: Manufacture of vinyl chloride resin eraser

[0100] As shown in Table 3, the vinyl chloride resin, plasticizer, filler, and stabilizer were mixed and stirred to obtain a paste sol. After vacuum defoaming the obtained paste sol, it was poured into a molding mold (inner size: 100×100×10mm) kept at 130°C, heated for 26 minutes, cooled, taken out from the mold and cut to produce Vinyl chloride resin eraser (size 10×18×43mm).

[0101] The hardness and erasing rate of the obtained eraser were measured and evaluated in the same manner as in Examples 1 to 8. The results are shown in Table 3.

[0102] [table 3]

[0103]

Embodiment 12~13

[0105] The elastomer eraser that adds grinding material obtained in embodiment 3, embodiment 7 and the vinyl chloride resin eraser obtained in reference example 1 are mixed with the mixing ratio (weight basis) shown in table 4, insulated to The mixture was kneaded for 5 minutes in a pressurized kneader at 120°C. The obtained composition was cooled, pulverized into pellets, extruded into a predetermined shape with a single-screw extruder, and cut to produce an eraser (size: 12×18×43 mm).

[0106] Measure and evaluate the hardness and the erasing rate of the obtained eraser with the method same as embodiment 1~11. The results are shown in Table 4.

[0107] [Table 4]

[0108]

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Abstract

Provided is an abrasive-containing eraser comprising an elastomer composition, in which crosslinked natural rubber particles are dispersed like islands in a matrix comprising a biomass plastic, and an abrasive. Thus, it is possible to provide an abrasive-containing eraser using an elastomer composition, which is recyclable and eco-friendly and suits for the recycle-based society, without relying on fossil resources or relying thereon but at a reduced extent.

Description

technical field [0001] The present invention relates to an eraser, which uses an elastomer composition as a base material and contains abrasive materials for erasing images formed by using ink for writing, ballpoint pens, printed matter, electrostatic copying, etc. The composite eraser added with abrasive materials is independent of fossil resources, recyclable, environmentally friendly, and compatible with a recycling society. Background technique [0002] So far, industries and economies have been developed by using fossil resources such as oil and coal, and a social system has been established in which mass production, mass consumption, and mass disposal have been established. At present, most of the basis of life depends on fossil resources that are about to be exhausted. [0003] The current social system produces economic affluence and convenience, but on the other hand, it also emits waste and carbon dioxide that exceed natural purification capabilities, and makes env...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B43L19/00C08K3/26C08L7/00C08L27/06C08L93/00
CPCC08L67/04C08L77/00C08L77/02C08L101/16B43L19/0025C08L27/06C08L3/06C08L23/18C08L7/00C08L1/12C08L67/02C08K3/00C08K3/20C08K3/36C08K5/0016C08K5/0025C08K3/013C08L2666/04
Inventor 森本和树西冈靖博
Owner SEED CO LTD
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