High-temperature-resistant release paper and preparation method thereof

A technology of release paper and high temperature resistance, which is applied in the field of release paper and can solve the problems of easy curling, high cost and low heat resistance of release paper

Active Publication Date: 2020-07-28
浙江望泰特种纸业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because thermoplastic resin has good plasticity after being heated, after embossing by special embossing process, the pattern properties of the release paper are very stable, but the release paper produced by thermoplastic resin has some disadvantages, such as high cost, Low heat resistance, unstable release performance, easy curling of release paper, poor solvent resistance, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A preparation method of high temperature resistant release paper, comprising the steps of:

[0025] Carry out corona treatment under the power of 0.6kW after the base paper is dedusted by fan;

[0026] By weight percentage, the mixture of 60% of PP, 5% of PE, 10% of TPX and 5% of silicone high-temperature additives is stirred and mixed in the feeding port of the screw extruder, and the screw is extruded while stirring. Each part of the extruder starts to be heated separately; while stirring evenly, the mixture starts to melt and mix, and each part of the screw extruder also reaches the preset temperature; The discharge of the coating material is completed from the die outlet at the die extrusion; the operating speed of the screw extruder is 50m / min, and the temperature of the screw extruder gradually rises from 250°C at the feed inlet to 320°C at the die outlet , followed by 250°C at the feed inlet, 275°C at the screw running point, 300°C at the end of the screw, 320°C...

Embodiment 2

[0029] A preparation method of high temperature resistant release paper, comprising the steps of:

[0030] Carry out corona treatment under the power of 0.7kW after the base paper is dedusted by fan;

[0031] By weight percentage, the mixture of 70% of PP, 7% of PE, 15% of TPX and 7.5% of silicone high-temperature-resistant auxiliary agent is stirred and mixed in the feeding port of the screw extruder, and the screw is extruded while stirring. Each part of the extruder starts to be heated separately; while stirring evenly, the mixture starts to melt and mix, and each part of the screw extruder also reaches the preset temperature; The discharge of the coating material is completed from the outlet of the mold at the extrusion part of the mold; the operating speed of the screw extruder is 60m / min, and the temperature of the screw extruder gradually rises from 250°C at the feed inlet to 320°C at the outlet of the mold , followed by 250°C at the feed inlet, 275°C at the screw runn...

Embodiment 3

[0034] A preparation method of high temperature resistant release paper, comprising the steps of:

[0035] Carry out corona treatment under the power of 0.8kW after the base paper is dedusted by fan;

[0036] By weight percentage, the mixture of 80% PP, 10% PE, 20% TPX and 10% silicone high-temperature-resistant auxiliary agent is stirred and mixed in the feeding port of the screw extruder, and the screw extrudes while stirring. Each part of the extruder starts to be heated separately; while stirring evenly, the mixture starts to melt and mix, and each part of the screw extruder also reaches the preset temperature; The discharge of the coating material is completed from the outlet of the mold at the extrusion part of the mold; the operating speed of the screw extruder is 70m / min, and the temperature of the screw extruder gradually rises from 250°C at the feed inlet to 320°C at the outlet of the mold , followed by 250°C at the feed inlet, 275°C at the screw running point, 300°...

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PUM

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Abstract

The invention relates to the field of release paper, in particular to high-temperature-resistant release paper. The high-temperature-resistant release paper comprises a coating layer consisting of PP,PE, TPX resin and an organosilicon high-temperature-resistant aid, wherein the coating layer coats base paper in a laminating manner; in terms of weight percentage, the PP accounts for 60-80%, the PEaccounts for 5-10%, the TPX resin accounts for 10-20%, and the organic silicon high-temperature-resistant aid accounts for 5-10%; all the components are mixed and melted through a screw extruder to obtain a coating material; the coating material is subjected to laminating and embossing on the surface of the base paper through a laminating machine so as to obtain the high-temperature-resistant release paper; and the base paper is subjected to corona treatment before lamination. The release paper prepared in the invention can meet the use requirements of a high-temperature environment, is improved in scratch resistance, and has good paper film bonding strength, and therefore, various different performance requirements on the PU leather embossed release paper are met.

Description

technical field [0001] The invention relates to the field of release paper, in particular to a high-temperature-resistant release paper and a preparation method thereof. Background technique [0002] Release paper is divided into silicon-based paper, non-silicon-based paper, and special paper according to its material. According to the use temperature, it can be divided into high temperature paper and low temperature paper. According to the surface resin material of the release paper, it is divided into silicone resin, PP polypropylene resin and electronic hardening resin (U / C). Among them, the advantage of silicone resin is that it can withstand the action of DMF, it is cheap, has good high temperature resistance, and the temperature resistance is 180-190 °C; the advantage of PP resin is that it has a good pattern reproduction rate and strong color expression, but the disadvantage is that it cannot withstand high temperature and high temperature resistance. The range is o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H27/00D21H19/22D21H19/14D21H23/46D21H23/30D21H25/00B31F1/07
CPCD21H27/001D21H19/22D21H19/14D21H23/46D21H23/30D21H25/005B31F1/07
Inventor 张智慧
Owner 浙江望泰特种纸业有限公司
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