Preparation method for producing thermoplastic polyvinyl chloride soft adhesive tape with two highlight surfaces and no flow mark

Abstract

A method for preparing a thermoplastic soft polyvinyl chloride adhesive tape, at least including a preparation process for instant quenching and hardening to shape and a preparation process for using a pressurized air-dispelling coiler to wind up a finished polyvinyl chloride soft adhesive tape; wherein, the instant The purpose of the hardening and shaping preparation process is to keep the surface quality of the PVC soft adhesive tape free of flow marks and the haze is consistent, and the purpose of using the pressurized air-driven coiler is to ensure that the PVC The surface of the soft adhesive tape is flat and free of bubbles and dents. Even if the PVC soft adhesive tape is rolled and stored, the upper surface and the lower bottom surface in the rolled state are in contact for a long time, and the light fog on the upper surface and the lower bottom surface The degree is still consistent, and it is suitable for making a double-sided high-gloss polyvinyl chloride soft adhesive tape without flow marks.

Description

technical field [0001] The invention relates to a soft polyvinyl chloride adhesive tape, in particular to a preparation method of a thermoplastic polyvinyl chloride soft adhesive cloth, which is used for making a double-sided high-gloss thermoplastic polyvinyl chloride soft adhesive cloth without flow marks. Background technique [0002] The well-known preparation process of making thermoplastic polyvinyl chloride soft adhesive tape, in the prior art, is to use polyvinyl chloride (PVC) resin, plasticizer, stabilizer and other auxiliary agents (comprising modifying agent, surfactant, Dispersant and UV absorber) as raw materials, according to the specified ratio, the raw materials are evenly stirred into a mixture with a mixer, and then introduced into a 10,000-horsepower machine for uniform mixing, and then the mixture is fully gelled by a roller machine to form a material temperature between 160 ~ 180°C melt adhesive (hereinafter referred to as melt PVC adhesive). [0003] ...

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Problems solved by technology

[0010] However, the above-mentioned well-known preparation process has the following disadvantages. As a result, the surface appearance of the soft polyvinyl chloride adhesive tape 60 (or the embossed polyvinyl chloride soft adhesive tape 65) is not good, and it is not suitable for making double-sided high-gloss non-woven fabrics. Polyvinyl chloride soft adhesive tape with flow marks:

[0011] 1. The temperature of the high-temperature hot-melt adhesive cloth calendered from the calender 10 is between 160°C and 180°C. It is well known that the preparation process is to gradually cool the high-temperature hot-melt adhesive cloth to normal temperature by means of gradually cooling down to normal temperature, but the preliminary finalization In the stage of hot-melt adhesive cloth (or embossed hot-melt adhesive cloth), the initially shaped hot-melt adhesive cloth (or embossed hot-melt adhesive cloth) will cause the fluidity of its rubber molecules to deteriorate because it is gradually cooled. Under the rotating traction and stretching of the roller, the surface of the preliminarily shaped hot-melt adhesive (or embossed hot-melt adhesive) will often have linear streaks that do not flow smoothly, affecting the appearance of the surface;

[0012] 2. The appearance of the surface of the embossed hot-melt adhesive cloth, in the stage of preliminary shaping of the embossed hot-melt adhesive cloth, in addition to the appearance of linear streaks, in the process of embossing, the embossed surface of the embossed hot-melt adhesive cloth is also Due to the deterioration of the fluidity of the rubber molecules, once it is pressed by the embossing wheel, the haze of the embossed surface will decrease, resulting in the haze of the upper embossed surface of the embossed hot-melt adhesive cloth and the surface of the lower bottom surface. The embossed hot-melt adhesive cloth with double-sided high-gloss cannot be produced;

[0013] 3. Secondly, the finished product of PVC soft adhesive tape 60 (or embossed PVC soft adhesive cloth 65) after cooling and shaping is convenient for storage and handling when coiled at high speed by coiler 25 (or coiler 35). When cylindrical, the air will be involved in the middle of the roll layer of PVC soft adhesive tape 60 (or embossed polyvinyl chloride soft adhesive tape 65), and after a long time in the roll layer without being discharged, it will gather into Bubbles in rows and columns, and cling to the surface of the roll layer of soft polyvinyl chloride adhesive plaster 60 (or embossed soft polyvinyl chloride adhesive plaster 65), resulting in soft polyvinyl chloride adhesive plaster 60 (or soft vinyl chloride adhesive plaster 65) unfolded from the rolled state The surface of the embossed polyvinyl chloride soft adhesive tape 65) will leave rows and rows of bubble dents, which will affect the appearance of the surface;

[0014] 4. When the coiler 25 (or coiler 35) winds up the finished product of PVC soft adhesive tape 60 (or embossed PVC soft adhesive cloth 65), the PVC soft adhesive tape 60 (or embossed PVC soft adhesive tape 65) The upper surface and the lower layer of the soft polyvinyl chloride adhesive tape 65) are subjected to different degrees of retraction tension, causing the upper surface and the lower layer of the lower surface to be subjected to different degrees of surface stress, which results in the PVC soft adhesive tape 60 (or embossed polyvinyl chloride soft tape 65) has different haze degrees on the upper surface and lower bottom surface, and it is impossible to produce double-sided high-gloss polyvinyl chloride soft tape 60 (or embossed polyvinyl chloride soft tape 65)

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