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Method for blowing film and making bag by using full biodegradable material as base material

A biodegradable material and all-biological technology, applied in the field of film blowing and bag making based on all-biodegradable materials, can solve the problems of lack of processing technology

Inactive Publication Date: 2010-01-13
盖勇
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] To sum up, this field lacks a set of processing techniques and common fault handling methods for film blowing, printing, and bag making using biodegradable materials under existing equipment conditions

Method used

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  • Method for blowing film and making bag by using full biodegradable material as base material
  • Method for blowing film and making bag by using full biodegradable material as base material

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0027] Example 1, the base material of fully biodegradable materials is the "MaterBi" brand product that Italian NOVMANT company has added polyvinyl alcohol (PVA) to starch since the 1990s. The film blowing and bag making methods include:

[0028] 1) homework preparation;

[0029] 2) Film blowing: add color masterbatch, then blow film, and finally get a film; process parameters include:

[0030] a) Control the temperature of the plasticizing section of the film blowing machine to be 130°C, the temperature of the homogenizing section to be 142°C, and the temperature of the extrusion section to be 140°C;

[0031] b) The screw length-to-diameter ratio L / D of the film blowing machine is 30: 1; the inflation ratio is 1: 2.5; the height from the die mouth to the traction roller is 3m;

[0032] c) The screw speed is 18 rpm at the start, and then gradually increases the speed until it catches up with the winding speed of the film;

[0033] 3) Bag making: heat-sealing, sealing, and b...

example 2

[0040] Example 2, the base material of the fully biodegradable material is an aliphatic aromatic random copolyester (Ecoflex) based on polyester and starch developed by BASF in Germany, and the film blowing and bag making methods include:

[0041] 1) homework preparation;

[0042] 2) Film blowing: add color masterbatch, then blow film, and finally get a film; process parameters include:

[0043] a) Control the temperature of the plasticizing section of the film blowing machine to be 122°C, the temperature of the homogenizing section to be 146°C, and the temperature of the extrusion section to be 142°C;

[0044] b) The length-to-diameter ratio of the screw of the film blowing machine is L / D32:1; the inflation ratio is 1:2.8; the height from the die mouth to the traction roller is 3.5m;

[0045] c) The screw speed is 25 rpm at the start, and then gradually increases the speed until it catches up with the winding speed of the film;

[0046] 3) Bag making: heat-sealing, sealing,...

example 3

[0053] Example 3, the base material of fully biodegradable materials is made of BF materials blended with thermoplastic starch (TPS), aliphatic polyester (AP) and natural plasticizers (glycerin and sorbitol) from Biograde Australia, blown film, and made into bags method, the steps include:

[0054] A film blowing and bag making method based on fully biodegradable materials, the steps comprising:

[0055] 1) homework preparation;

[0056] 2) Film blowing: add color masterbatch, then blow film, and finally get a film; process parameters include:

[0057] a) Control the temperature of the plasticizing section of the film blowing machine to be 140°C, the temperature of the homogenizing section to be 150°C, and the temperature of the extrusion section to be 145°C;

[0058] b) The screw length-to-diameter ratio L / D of the film blowing machine is 35: 1; the inflation ratio is 1: 3; the height from the die mouth to the traction roller is 4m;

[0059] c) The screw speed is 35 rpm at...

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Abstract

The invention relates to a method for blowing a film and making a bag by using a full biodegradable material as a base material. The method comprises the following steps: (1) work preparation; (2) film blowing: adding a color parent stock, then blowing a film and finally obtaining the film; and (3) bag making: heat-sealing the film, sealing an opening and making a bag so as to obtain a finished bag, wherein the film blowing step has the following parameters: (a) controlling the temperature of a plasticization section of a film blowing machine to be 125-140 DEG C, the temperature of a homogenization section to be 140-150 DEG C and the temperature of an extrusion section to be 140-145 DEG C; (b) ensuring a length-diameter ratio L / D of a screw rod of the film blowing machine to be larger than 28:1, a blow ratio to be 1:2.5-1:3 and a height from a die orifice to a pull roll to be larger than 2.5m; and (c) maintaining the rotating speed of the screw rod to be 17-35 turns / minutes at the beginning and then gradually speeding up until catching up the take-up speed of the film. The method has the process requirement that the temperature of heat sealing and edge sealing is 140-180 DEG C. The existing equipment can be used for blowing the film and making the bag by using the full biodegradable material as the base material by the method to obtain a qualified product.

Description

technical field [0001] The invention relates to an application method of a fully biodegradable material, in particular to a film blowing and bag making method using the fully biodegradable material as a base material. Background technique [0002] Plastic packaging products made of polyethylene are widely used in people's daily life, industrial product packaging and retail business. These plastic packaging bags (films) are non-degradable materials, which are harmful to the environment and are not conducive to environmental protection. . In response to this situation, fully biodegradable plastics are increasingly being used. Fully biodegradable plastics are mainly made from natural polymers (such as starch, cellulose, chitin) or agricultural by-products through microbial fermentation or synthesis of biodegradable polymers, such as thermoplastic starch plastics, aliphatic polyesters, polylactic acid , starch / polyvinyl alcohol, etc. In terms of specific commercial applicatio...

Claims

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Application Information

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IPC IPC(8): B65D30/02B29C55/28B31B1/64
CPCY02W90/10
Inventor 盖勇
Owner 盖勇
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