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Solvent-free hot-melt pressure-sensitive masking tape and its manufacturing process

A technology of masking tape and production process, which is applied in the direction of adhesive type, adhesive, rosin adhesive, etc., can solve the problems of reducing the cohesive strength of glue, affecting production efficiency, and aggravating the aging of glue, so as to solve the problem of glue supply , Improve production efficiency and ensure quality

Inactive Publication Date: 2016-07-06
SHANGHAI SMITH ADHESIVE NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This may cause part of the rubber in the glue to break the chain, reduce the cohesive strength of the glue itself, and aggravate the aging of the glue
In addition, due to the high viscosity of the glue, the conventional glue supply equipment may have insufficient power, which will affect the production efficiency

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0016] The present invention is further elaborated below by way of specific embodiments:

[0017] This embodiment provides a solvent-free hot-melt pressure-sensitive masking tape manufacturing process, which specifically includes the following steps:

[0018] a. Prepare each raw material according to the following weight percentage: rubber 10-65%, tackifying resin 20-70%, softener 5-45%, anti-aging agent 2-8‰, coupling agent 1-2‰, inorganic Filler 0~15%;

[0019] b. After being accurately measured by the automatic meter, the equipped raw materials are directly sucked into the extruder by means of vacuum suction and fully mixed to produce hot-melt glue;

[0020] c. The hot melt glue produced by the extruder is directly supplied to the coating equipment, and the coating equipment coats the hot melt glue on the masking paper to obtain a solvent-free (hot melt) pressure-sensitive masking tape .

[0021] The rubber in step a includes one or more of styrene-butadiene rubber or SI...

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Abstract

The invention provides a no-solvent hot-melt pressure-sensitive masking tape and a manufacturing process thereof. During a production process, the raw materials are prepared according to the weight percentages that: rubber 10-65%, tackifying resin 20-70%, a softening agent 5-45%, an anti-aging agent 0.2-0.8%, a coupling agent 0.1-0.3%, an inorganic filling material 0-15%, and the like; the raw materials with a precise ratio are added into an extruder, and are subjected to sufficient melt-mixing, such that hot-melt glue is produced; the extruder directly supplies the produced hot-melt glue to a coating device; and the coating device coats the hot-melt glue onto a masking tape paper, such that the no-solvent hot-melt pressure-sensitive masking tape is obtained. According to the invention, the extruder is used for replacing original kneading machine and stirring tank to produce hot-melt glue, such that secondary glue melting is not needed before glue coating. Therefore, glue cohesive strength is ensured, and a problem of supply difficulty of high-viscosity glue is solved. With the process, production numerical control is realized, and production efficiency is improved.

Description

technical field [0001] The invention relates to a solvent-free hot-melt pressure-sensitive masking tape and a manufacturing process thereof, in particular to a pressure-sensitive masking tape without secondary melting adhesive and a manufacturing process thereof. Background technique [0002] Pressure-sensitive adhesives are adhesives that achieve a good bond in a short time by simply applying finger pressure. And this kind of solvent-free hot-melt pressure-sensitive adhesive can flow like a fluid at a higher temperature, and can wet the surface after applying pressure at room temperature to produce a certain adhesive force. It is widely used in the production of adhesive tapes, pressure-sensitive Type labels, sanitary products and other similar products. A pressure sensitive adhesive is typically characterized by its shear strength, peel strength, tack and adhesive transfer properties. Pressure-sensitive masking tape is obtained by coating pressure-sensitive adhesive on m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J7/04C09J107/00C09J109/06C09J153/02C09J145/00C09J157/02C09J193/04
Inventor 李春侠王如义
Owner SHANGHAI SMITH ADHESIVE NEW MATERIAL
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