Rubber compsns. for cleaning and stripping mould

A rubber composition and demoulding technology, which is applied in the field of mold cleaning and demoulding rubber compositions, can solve problems such as deterioration of the working environment, and achieve excellent demoulding force, excellent mutual solubility, and easy mixing operations

Active Publication Date: 2006-02-01
纳拉化学株式会社
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such a release sheet has the advantage of being easy to work by imparting release properties, but has the disadvantage of deteriorating the working envir...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037]In 1000g of butadiene rubber (BR), mix and add 3 kinds of mixed detergents (monoethanolamine (MEA) 30g, N-methylpyrrolidone (NMP) 25g, dimethyl sulfoxide (DMSO) 35g), in Mixing curing agent (4,4-diperoxide tert-butyl n-butyl valerate 30g), inorganic filler (silica 300g, titanium oxide 50g), kneader and roll mill And adsorbent (Zolite X type 400g). The mixture produced in this way was put into a mold (MQFP 28×28) contaminated with epoxy molding compound (EMC), and heated at 170°C at 60kg / cm 2 The pressure is cured for 450 seconds to clean the mold. This operation is repeated until the contaminants on the mold are completely removed.

[0038] As a result, an average of 8 repeated cleaning operations can remove contaminants from the mold.

Embodiment 2

[0040] In order to confirm the effect of the cleaning catalyst, in the composition of Example 1, 5 g of KOH was added as the cleaning catalyst, and the test was performed in the same manner as in Example 1.

[0041] As a result, an average of 5 to 6 repeated cleaning operations can completely remove contaminants from the mold. This means that compared with Example 1, the washing ability is improved by about 25 to 30%.

Embodiment 3

[0043] In order to confirm the release effect, 30 g of silicone oil was further added to the composition of Example 2, and the test was performed in the same manner as in Example 2.

[0044] In Example 2, the mold was opened, and the cured rubber sheet could be grasped by hand and applied force to separate the cured rubber sheet from the mold surface. However, in this example with the addition of silicone oil, the rubber sheet was not applied with force. Next, the rubber sheet can be easily separated from the mold surface. This means that the release of the rubber sheet is greatly improved by the addition of the release agent.

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PUM

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Abstract

The invention relates to a rubber composition for cleaning and stripping mould which is used to eliminate the pollutant remained in mould and to endow mould stripping capability during thermoplastic resin continuous molding process, in particular to a rubber composition comprising detergent, stripping agent, curing agent and absorbent as main components in a non-crosslinking rubber. The composition does not generate odor and smoke during cleaning and stripping process of the mould and greatly reduces the number and time of the working procedure since the invention has high cleaning and stripping capability.

Description

Technical field [0001] The present invention relates to a rubber composition that removes contaminants remaining in a mold during continuous molding of a thermoplastic resin and imparts mold releasability. Specifically, it provides a rubber composition that contains a detergent in an uncrosslinked rubber , Mold release agent, curing agent and adsorbent as the main components, almost no smell and smoke are generated during mold cleaning and mold release performance. Because of its high cleaning power and mold release power, the process can be greatly reduced. The number and time. Background technique [0002] Using thermoplastic resin as a raw material, compressing and heating it to form a product, the contaminants mixed in the work process and part of the molded product are carbonized and remain. These will become the repetitive work process in the future. The contaminants not only cause some defects in the manufactured moldings, but also cause the quality of the products to decl...

Claims

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Application Information

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IPC IPC(8): C08L21/00C08L83/00C08K5/16B29C33/62
Inventor 郑根奉李东权李相汶
Owner 纳拉化学株式会社
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