The invention discloses a production process of a PVC electrical adhesive tape, belongs to the technical field of adhesive tape processing, and is designed to solve the problems that a conventional electrical adhesive tape processing method is low in working efficiency and not environmentally friendly. The production process of the PVC electrical adhesive tape provided by the invention comprises the following steps: a PVC base material is extruded by a twin-screw extruder and then is subjected to flow casting processing to form a PVC base film; a pressure-sensitive adhesive extruded by the twin-screw extruder is subjected to flow casting processing again on the PVC base film to form an adhesive PVC film. The production process of the PVC electrical adhesive tape provided by the invention can improve the processing efficiency, reduce the production costs, realize energy saving and environmental protection, and can prevent the pressure-sensitive adhesive from aging.

A kind of production technology of PVC electrical adhesive tape
Technical field
The present invention relates to adhesive tape technology field, be specifically related to the production technology of a kind of PVC electrical adhesive tape.
Background technology
During electrical equipment manufacture, constructing and use, a large amount of electric wires, the various terminals of cable and jointing need to insulate the position that may leak electricity and encapsulation process with electrical adhesive tape.The formal name used at school of electrical adhesive tape is polrvinyl chloride electric insulating tape, is generally referred to as in the industry electric insulation adhesive tape or insulating tape, also referred to as PVC electrical adhesive tape.Wherein, PVC film Main Ingredients and Appearance is polrvinyl chloride, it is possible to additionally incorporate other compositions to strengthen its thermostability, toughness, ductility etc..
Curtain coating is a kind of plastic foil production technology, first pass through extruder raw material plastifying fusion, then extruded by T-type structure mould, be cast in the form of sheets on the roll surface of cooling roller that rotates smoothly, diaphragm is cooled cooling sizing on cooling roller, then goods rolling after traction, trimming.Pressure sensitive adhesive is that a class has the adhesive having sensitivity to pressure, and it is mainly for the preparation of pressure sensitive adhesive tape.
The production technology of existing electrical adhesive tape is to paste release layer in PVC film, is coated with hot-fusible pressure-sensitive adhesive on release layer.Owing to the melt temperature of hot-fusible pressure-sensitive adhesive is generally between 170 degree to 180 degree, and PVC film temperature tolerance is less than this temperature range, therefore, hot-fusible pressure-sensitive adhesive cannot be coated directly onto in PVC film, must be processed by transfer method, this production technology exists that working (machining) efficiency is low, pressure sensitive adhesive is the most aging, is manufactured into the problems such as height.Therefore, the production technology of a kind of novel electrical adhesive tape is needed badly to improve working (machining) efficiency, to reduce production cost, prevent pressure sensitive adhesive aging.

PVC anti-slip tape

Summary of the invention
The purpose of the present invention is to propose to that a kind of working (machining) efficiency is high, production cost is low, pressure sensitive adhesive is difficult to aging electrical adhesive tape production technology.
For reaching this purpose, the present invention by the following technical solutions:
The production technology of a kind of electrical adhesive tape, described production technology is: PVC base material is carried out curtain coating through casting machine after being extruded by double screw extruder and is processed to form PVC base film；The pressure sensitive adhesive of double screw extruder extrusion carries out curtain coating in described PVC base film again and is processed to form the sticking PVC film of tool.
As a preferred version of the present invention, the production technology of described PVC electrical adhesive tape specifically includes following step；
Step S1, prepare described PVC base material；
Step S2, the described PVC base material in described step S1 is fed through double screw extruder is extruded by T-shaped die head；
Step S3, the PVC base material of extrusion in described step S2 is injected casting machine carry out curtain coating and be processed to form PVC base film；
Step S4, described pressure sensitive adhesive is fed through double screw extruder is extruded by T-shaped die head；
It is cast in step S5, the PVC base film that the pressure sensitive adhesive of extrusion in described step S4 is formed in described step S3.
As a preferred version of the present invention, also include after described step S5: step S6, the operation of cooling and shaping of carrying out；
As a preferred version of the present invention, also include after described step S6: step S7, carry out traction flatten operation；
As a preferred version of the present invention, also include after described step S7: step S8, the operation of trimming rolling of carrying out.
As a preferred version of the present invention, in described step S6, cooling down by being passed through cooling water in cooling roller, cooling water temperature is between 13 ° to 15 °.
As a preferred version of the present invention, in described step S7, the PVC film of cooling and shaping carrying out longitudinal, the most horizontal first two-step stretch, draft temperature is between 35 ° to 55 °.
As a preferred version of the present invention, in described step S8, the PVC film that traction flattens being carried out trimming rolling, rolling speed is 40-55m/min.
As a preferred version of the present invention, the thickness having sticking PVC film of formation is between 0.15mm to 0.20mm.
The invention have the benefit that

The production technology of the PVC electrical adhesive tape of the present invention is carried out curtain coating through casting machine after first being extruded by double screw extruder by PVC base material and is processed to form PVC base film, then the pressure sensitive adhesive that double screw extruder is extruded carrying out in PVC base film curtain coating again and is processed to form the sticking PVC film of tool, this production technology solves the problems such as existing processes efficiency is low, energy consumption is high, cost is high, electrical adhesive tape poor performance.The production technology of the PVC electrical adhesive tape of the present invention makes electrical adhesive tape working (machining) efficiency be greatly improved, energy-conserving and environment-protective, processing cost effectively reduce, and what is more important pressure sensitive adhesive is difficult to aging.
Accompanying drawing explanation
Fig. 1 is the flow chart of the production technology of the PVC electrical adhesive tape that the preferred embodiment of the present invention one provides.
Detailed description of the invention
Further illustrate technical scheme below in conjunction with the accompanying drawings and by detailed description of the invention.
Preferred embodiment one:
This preferred embodiment provides the production technology of a kind of PVC electrical adhesive tape.As it is shown in figure 1, the production technology of PVC electrical adhesive tape specifically includes following step；
Step S1, preparation PVC base material；PVC is with Corvic as primary raw material, adding appropriate age resister, modifying agent etc. again through the material of the technique such as mixing, calendering, vacuum forming, it has the features such as lightweight, protection against the tide, fire-retardant, easy construction, in addition, specification, color, pattern are various, practical.
Step S2, the PVC base material in step S1 is fed through double screw extruder is extruded by T-shaped die head；
Step S3, the PVC base material of extrusion in step S2 is injected casting machine carry out curtain coating and be processed to form PVC base film；
Step S4, pressure sensitive adhesive is fed through double screw extruder is extruded by T-shaped die head；
It is cast in step S5, the PVC base film that the pressure sensitive adhesive of extrusion in step S4 is formed in step s3；
Step S6, the operation of cooling and shaping of carrying out, specifically, cool down by being passed through cooling water in cooling roller, cooling water temperature between 13 ° to 15 °, preferably 14 °；
Step S7, carry out the operation that traction flattens, the PVC film of cooling and shaping will carry out longitudinal, the most horizontal first two-step stretch, draft temperature between 35 ° to 55 °, preferably 45 °；
Step S8, carrying out the operation of trimming rolling, rolling speed is 40-55m/min, preferably 50m/min, and after trimming rolling, final acquisition has sticking PVC film.
By above-mentioned production technology make have sticking PVC film thickness between 0.15mm to 0.20mm, preferably 0.18mm.
The production technology of the PVC electrical adhesive tape in the present embodiment need not use release layer to be coated pressure sensitive adhesive after being coated in PVC base film, but directly the pressure sensitive adhesive that double screw extruder is extruded is carried out curtain coating processing in PVC base film thus form the sticking PVC film of tool, this production technology makes electrical adhesive tape working (machining) efficiency be greatly improved, energy-conserving and environment-protective, processing cost effectively reduce, and pressure sensitive adhesive is difficult to aging.
Preferred embodiment two:
This preferred embodiment provides the production technology of a kind of PVC electrical adhesive tape, and this production technology is essentially identical with the production technology described in preferred embodiment one, specifically includes following step；
Step S1, preparation PVC base material；
Step S2, the PVC base material in step S1 is fed through double screw extruder is extruded by T-shaped die head；
Step S3, the PVC base material of extrusion in step S2 is injected casting machine carry out curtain coating and be processed to form PVC base film；
Step S4, pressure sensitive adhesive is fed through double screw extruder is extruded by T-shaped die head；
It is cast in step S5, the PVC base film that the pressure sensitive adhesive of extrusion in step S4 is formed in step s3；
Step S6, the operation of cooling and shaping of carrying out, specifically, cool down by being passed through cooling water in cooling roller, cooling water temperature is 13 °；
Step S7, carrying out the operation that traction flattens, the PVC film of cooling and shaping will carry out longitudinal, the most horizontal first two-step stretch, draft temperature is 55 °；
Step S8, carrying out the operation of trimming rolling, rolling speed is 40m/min, and after trimming rolling, final acquisition has sticking PVC film.
The thickness having sticking PVC film made by above-mentioned production technology is 0.15mm.
Preferred embodiment three:
This preferred embodiment provides the production technology of a kind of PVC electrical adhesive tape, and this production technology is essentially identical with the production technology described in preferred embodiment one, and difference is:
Step S6, the operation of cooling and shaping of carrying out, specifically, cool down by being passed through cooling water in cooling roller, cooling water temperature is 15 °；
Step S7, carrying out the operation that traction flattens, the PVC film of cooling and shaping will carry out longitudinal, the most horizontal first two-step stretch, draft temperature is 35 °；
Step S8, carrying out the operation of trimming rolling, rolling speed is 55m/min, and after trimming rolling, final acquisition has sticking PVC film.
The thickness having sticking PVC film made by above-mentioned production technology is 0.20mm.
Finally, it can further be stated that, in this article, term ” includes “, ” comprising ” or its any other variant are intended to comprising of nonexcludability, so that include that the process of a series of key element, method, article or equipment not only include those key elements, but also include other key elements being not expressly set out, or also include the key element intrinsic for this process, method, article or equipment.In the case of there is no more restriction, statement ” including … ” key element limited, it is not excluded that there is also other identical element in including the process of described key element, method, article or equipment.
It is above combining the embodiment that accompanying drawing provides; it is only that the preferred version realizing the present invention is not intended to limit; any detailed description of the invention to the present invention is modified or portion of techniques feature is carried out equivalent; without deviating from the spirit of technical solution of the present invention, all should contain in the middle of the technical scheme scope that the present invention is claimed.Protection scope of the present invention also includes that those skilled in the art do not pay the thinkable any alternate embodiments of creative work.