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Method of producing composite film specially used for novel plastic woven bag

A technology of a plastic woven bag and a manufacturing method, which is applied to the manufacturing field of a special composite film for a new type of plastic woven bag, can solve problems such as easy generation of static electricity, and achieve the effects of improving quality, excellent anti-static, and high stiffness

Inactive Publication Date: 2010-01-13
群力塑胶有限公司
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] In order to overcome the disadvantage that the existing composite film for plastic woven bags is easy to generate static electricity in the post-processing process, the present invention provides a manufacturing method for a new type of composite film for plastic woven bags

Method used

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  • Method of producing composite film specially used for novel plastic woven bag
  • Method of producing composite film specially used for novel plastic woven bag

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Embodiment Construction

[0020] exist figure 1 Among them, surface layer 1 (1) and surface layer 2 (3) are melt extruded layers of auxiliary extruder (8) and auxiliary extruder (10) respectively, with a thickness of 1 μm. The core layer (2) is a layer melted and extruded by the main extruder (9), with a thickness of 11-16 μm, and contains an antistatic agent.

[0021] figure 2 , add biaxially stretched grade polypropylene and antistatic agent to the main hopper (4) by volumetric metering method, and add biaxially stretched grade polypropylene to the auxiliary hopper (5) and auxiliary hopper (7). The material in the main hopper (4) enters the mixer (6) to mix evenly, and is sucked to the main extruder (9) through the negative pressure device, and the material in the auxiliary hopper (5) is sucked to the auxiliary extruder through the negative pressure device (10), the material in the auxiliary hopper (7) is sucked to the auxiliary extruder (8) through the negative pressure device, the main extruder ...

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Abstract

The invention relates to method of producing a composite film specially used for a novel plastic woven bag. A three-layer thin film is produced by coextruding and biaxially orienting special material of biaxially-oriented polystyrene; the biaxially-oriented polystyrene is coextruded into a cast piece at 230-260 DEG C; the cast piece is rapidly cooled to be crystallized and solidified into a thick film; and the thick piece is preheated at 95-145 DEGC, longitudinally oriented at 80-135 DEG C by the orientation ratio of 4.5-5.5 times, thermally shaped at 100-160 DEG C, latitudinally oriented, preheated again at 180-210 DEG C, latitudinally oriented again at 130-180 DEG C by the latitudinal orientation ratio of 7.9-9.0 times and towed and winded at the speed of 100-325 m / min. Therefore, the composite film specially used for the novel plastic woven bag, which is 13-18 mu m thick, is produced with simple process.

Description

Technical field [0001] The invention relates to a plastic composite film, in particular to a method for manufacturing a new type of special composite film for plastic woven bags. Background technique [0002] The special composite film for plastic woven bags has been developed in the past two decades and is used as a packaging material for high-end goods. This type of film has extremely clear transparency, gloss and good barrier properties, and is suitable for high-speed operation in packaging, coating, lamination and other processing processes. It has extremely high economic value and has become a rising high-tech industry. However, because the film is affected by static electricity in the post-processing process, when it is laminated with the plastic woven bag, it is not to be laminated, that is, it is attracted and superimposed with the plastic woven bag, which affects the post-processing quality. Contents of the invention [0003] In order to overcome the disadvantage...

Claims

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Application Information

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IPC IPC(8): B29C69/02B29C47/06B29C55/12B29K23/00B29L7/00B29L9/00
Inventor 吴昌硕
Owner 群力塑胶有限公司
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