Tenter oven and manufacturing method for stretched film

An oven and tenter technology, applied in drying, dryer, flat products and other directions, can solve the problem of uneven heat transfer efficiency, and achieve the effects of reducing power consumption, reducing air volume, and improving heating efficiency

Active Publication Date: 2013-12-11
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The following technique is known: the form of the air ejection port is formed as a large number of circular holes, the large number of circular holes are arranged in the first row and the second row at intervals Py, and the arrangement of the air ejection holes in the first row The arrangement of the air ejection holes in the second row is staggered, the first row and the second row are separated by a distance Px, and the air ejection surface is opposite to the traveling surface of the sheet at a distance L. The air ejection holes on the air ejection surface adopt a diameter of is D and satisfies relational formula (1): 6≦(L / D) / (Px / Py)≦9 and relational formula (2): 4≦L / D≦8, thus making the width of the film Uniformity in heat transfer efficiency in one direction becomes uniform (Patent Document 6)

Method used

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  • Tenter oven and manufacturing method for stretched film
  • Tenter oven and manufacturing method for stretched film
  • Tenter oven and manufacturing method for stretched film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0158] First, a method for evaluating the effects of the present invention will be described.

[0159] (1) Measurement method of MD flow

[0160] A model tester modeled as a chamber constituting the tenter oven of the present invention was produced, and the MD flow was measured using the model tester. Figure 8 It is a schematic diagram of the longitudinal section of the model testing machine. In order to carry out the test easily and cheaply, as a substitute for the thermoplastic resin film, a transparent acrylic plate 17 with a length of 2.0 m in the direction of travel of the film and a width of 1.8 m in the width direction of the travel film was fixed at the position of the film passing surface 5 .

[0161] The internal shape and dimensions of the chamber of the model testing machine were 1.8 m in length in the running direction of the film, 1.8 m in width in the width direction of the running film, and 1.5 m in height.

[0162] on the model testing machine Figure 8 T...

Embodiment 2

[0180] The wind speed [m / s] and the heating efficiency [W / m 2 K], uneven temperature [°C]. The results are shown in Table 1.

Embodiment 3

[0182] The wind speed [m / s] and the heating efficiency [W / m 2 K], uneven temperature [°C]. The results are shown in Table 1.

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Abstract

The present invention provides a tenter oven for stretching a thermoplastic resin film in the width direction thereof, wherein an air blowing nozzle provided therein that blows heated air onto a film running along a film passing surface is a proximate nozzle in which an air blowing opening provided on the air blowing surface thereof is formed as a slit, a distance L between the air blowing surface and the film passing surface and a slit width (B) of the slit satisfy the relationship expressed by the equation, (L / B)<=10, and the distance L is 150 mm or less.

Description

technical field [0001] The present invention relates to a tenter oven suitable for producing a stretched film made of a thermoplastic resin, and a method for manufacturing a stretched film made of a thermoplastic resin using the tenter oven. Background technique [0002] As a method for producing a stretched film made of thermoplastic resin, it is known that after stretching an unstretched film made of thermoplastic resin in its longitudinal direction to obtain a uniaxially stretched film, the obtained uniaxially stretched film is introduced into a tenter oven, In the tenter oven, a sequential biaxial stretching method in which the uniaxially stretched film is stretched in its width direction; and an unstretched film made of a thermoplastic resin is introduced into the tenter oven, and in the tenter oven, the A simultaneous biaxial stretching method in which the unstretched film is simultaneously stretched in its longitudinal direction and its width direction. [0003] Stre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C55/20B29C55/02B29L7/00
CPCB29C55/08B29C55/14B29C55/16B29C55/20B29C55/02B29C35/045F26B13/00F26B21/004
Inventor 李道锡川越拓也井上博之
Owner TORAY IND INC
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