Production method of composite film

A composite film and cast film technology, applied in chemical instruments and methods, lamination devices, lamination auxiliary operations, etc., to reduce production costs, save winding and unwinding equipment and transportation links, and prevent secondary pollution. Effect

Inactive Publication Date: 2018-08-03
XIAMEN YANJAN NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the defective of existing production method, and propose a kind of processing operation is simple, the preparation method of the non-woven fabric composite membrane of small hole porous film fluff facing outwards with low energy consumption

Method used

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  • Production method of composite film
  • Production method of composite film
  • Production method of composite film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Such as figure 1 , figure 2 As shown, 45% LDPE 100AC, 45% LLDPE 7050 and 10% functional masterbatch are used as raw materials. During production, the above mixture is melted and extruded by screw extruder A1 to form cast film 11; the formed cast film 11 is drawn To the forming net cage B1, the forming net cage B1 is nested on the forming drum C1. At the vacuum suction port D1 of the forming drum C1, due to the action of the vacuum pump connected to the forming drum C1, the forming drum C1 A negative pressure is formed, so that the casting film 11 on the forming cage B1 at the vacuum suction port D1 forms a small-porous porous film 11', wherein: the temperature of the casting film at the entrance of the vacuum suction port is 150°C, and the vacuum degree in the vacuum suction port area It is 0.05MPa, the forming net cage has 248 holes per square centimeter, and the area of ​​the single small hole is 1.5mm 2 ; The non-woven fabric 12 is glued through the guide roller E1 th...

Embodiment 2

[0041] Such as Figure 4 , Figure 5 As shown, using 20% ​​LDPE 3527, 80% LLDPE 7050 and 10% functional masterbatch as raw materials, during production, the above mixture is melted and extruded by screw extruder A2 to form cast film 2; the formed cast film 2 is drawn To the forming net cage B2, the forming net cage B2 is nested on the forming drum C2. At the vacuum suction port D2 of the forming drum C2, due to the action of the vacuum pump connected to the forming drum C2, the forming drum C2 Negative pressure is formed so that the cast film 21 on the forming cage B2 at the vacuum suction port D2 forms a small-porous porous film 21', where: the temperature of the cast film at the entrance of the vacuum suction port is 180°C, and the vacuum degree in the vacuum suction port area It is 0.08MPa, the forming net cage has 480 holes per square centimeter, and the area of ​​the single small hole is 0.1mm 2 The non-woven fabric 22 is glued through the guide roller E2 through the gluing...

Embodiment 3

[0044] Such as Image 6 , Figure 7 As shown, 40% LDPE 3527, 50% LLDPE 7050 and 10% functional masterbatch are used as raw materials. During production, the above mixture is melted and extruded by screw extruder A3 to form a cast film 31; the formed cast film 31 is drawn To the forming net cage B3, the forming net cage B3 is nested on the forming drum C3. At the vacuum suction port D3 of the forming drum C3, due to the action of the vacuum pump connected to the forming drum C3, the forming drum C3 A negative pressure is formed, so that the casting film 31 on the forming cage B3 at the vacuum suction port D3 forms a small-porous porous film 31', wherein: the temperature of the casting film at the entrance of the vacuum suction port is 160°C, and the vacuum degree of the vacuum suction port area Is 0.1MPa, the forming net cage has 1256 holes per square centimeter, and the area of ​​the single small hole is 0.05mm 2 The non-woven fabric 32 is glued through the guide roller E3 throu...

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Abstract

The invention discloses a production method of a composite film. The method comprises the following steps: drawing a cast film formed by melt extrusion of a polyolefin mixture by a screw extruder to amolding cylinder mould, nesting the molding cylinder mould on a molding drum, using a vacuum pump connected with the vacuum suction inlet of the molding drum to make the cast film at the vacuum suction inlet form a small-pore porous film, gluing a nonwoven fabric through a guide roller by a gluing device, introducing the glued nonwoven fabric into a compounding area formed by a compounding rollerbelow the vacuum suction inlet and the molding cylinder mould, and compounding the nonwoven fabric and the front surface of the small-pore porous film. Compared with methods adopting secondary punching, the method in the invention has the advantages of saving of rolling and unwinding devices and a transportation link, energy consumption saving, cost reduction, improvement of the production efficiency, and prevention of the secondary pollution of the material.

Description

Technical field [0001] The invention relates to the field of composite membrane manufacturing, in particular to a method for preparing composite membranes. Background technique [0002] Since the non-woven composite membrane has the characteristics of soft non-woven fabric, strong hydrophilicity, and less residual porous film and less re-infiltration, it is more and more used in absorbent products. However, the well-known non-woven composite film first plasticizes the plastic raw material by a screw extruder and extrudes it from the die to become a high-temperature plastic film. The high-temperature film is perforated under the action of vacuum or water flow, and then cooled, The steps of slitting, winding, etc. form a porous film roll. Most of the porous film rolls are combined with a non-woven fabric to form a non-woven composite membrane. Since the two processes of forming a porous film and compounding with a non-woven fabric in the known non-woven composite film are complete...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B37/12B32B37/10B32B38/04B29C41/24B29C41/50
CPCB32B37/1284B29C41/24B29C41/50B32B37/10B32B38/04B32B2038/047
Inventor 李世煌巫朝胜朱坤峰
Owner XIAMEN YANJAN NEW MATERIAL CO LTD
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