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High heat-sealing thin film and preparation thereof

A film preparation and high heat technology, which is applied in the direction of flat products, other household appliances, flexible coverings, etc., can solve the problems of high heat sealing films that are difficult to degrade, the speed of resource regeneration is slow, and the antistatic property is poor, so as to achieve good elongation and Tensile strength, moisture-proof, good heat-sealing effects

Active Publication Date: 2008-11-12
SHANDONG HENGLIAN NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, high-heat-sealing films on the domestic market are generally made of plastic materials, and plastic materials are generally prepared from petrochemical raw materials. Therefore, this high-heat-sealing film has two defects. First, petrochemical resources are facing a state of over-exploitation. The speed of resource regeneration is slow, so it is facing the trend of resource depletion. Secondly, the high heat-sealing film made of this material is difficult to degrade, so it causes great pollution to the environment. Therefore, the use of degradable and easily renewable materials has become the current high-heat-sealing film. A problem faced in use
[0004] The antistatic property of the heat-sealing film directly affects the dust absorption of the film bag. If the antistatic property is good, it is not easy to absorb dust; if the antistatic property is poor, it is easy to absorb dust. The clarity of the printed pattern, especially this kind of static electricity will absorb some packaging materials during high-speed automatic packaging in practical applications, thus affecting the heat-sealing fastness
Heat-sealing plastic films also have good antistatic properties. The films produced after adding antistatic agents to plastic particles have outstanding antistatic effects due to cationic quaternary ammonium salts in antistatic agents, but they are harmful to the skin, especially Not suitable for use in the food industry

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) choose the cotton pulp that weight ratio is 40%, the wood pulp of 60%, through breaker, desanding machine, obtain slurry, then through alkalization, pressing, aging, yellowing, dissolving, aging, filtration and The degassing process is used to make viscose, and then the viscose is pumped into the film former through the viscose metering pump, and the film is formed through the former; the film is put into the desulfurization tank for desulfurization; after desulfurization, it is transferred to the bleaching tank for bleaching;

[0031] (2) dechlorination, the film after bleaching is put into the dechlorination tank, adding concentration is 1.5g / L acetic acid addition 4.6kg / ton paper, dechlorination 6 seconds, transfers in the washing tank, washes 35 seconds;

[0032] (3) Anchoring, transfer the film after dechlorination and water washing into the anchoring tank, add melamine formaldehyde resin with a concentration of 0.5g / L and an amount of 1.3kg / ton of paper, contro...

Embodiment 2

[0041](1) choose the cotton pulp that weight ratio is 45%, the wood pulp of 55%, through breaker, desanding machine, obtain slurry, then through alkalization, pressing, aging, yellowing, dissolving, ripening, filtration and The degassing process is used to make viscose, and then the viscose is pumped into the film former through the viscose metering pump, and the film is formed through the former; the film is put into the desulfurization tank for desulfurization; after desulfurization, it is transferred to the bleaching tank for bleaching;

[0042] (2) dechlorination, the film after bleaching is put into the dechlorination tank, adding concentration is 1.9g / L acetic acid addition 5.5kg / ton paper, dechlorination 6 seconds, transfers in the washing tank, washes 30 seconds;

[0043] (3) Anchoring, transfer the film after dechlorination and water washing into the anchoring tank, add melamine formaldehyde resin with a concentration of 0.45g / L and an amount of 1.33kg / ton of paper, co...

Embodiment 3

[0052] The processing steps that present embodiment adopts are consistent with embodiment 1, wherein make the following changes:

[0053] (1) choosing weight ratio is 50% cotton pulp, 50% wood pulp;

[0054] (2) dechlorination, adding concentration is 1.7g / L acetic acid addition 5kg / ton of paper, dechlorination 6 seconds, washing 32 seconds;

[0055] (3) Anchoring, adding a concentration of 0.35g / L melamine formaldehyde resin, adding an amount of 1.25kg / ton of paper, controlling the temperature at 27°C, and anchoring for 6 seconds to complete the anchoring;

[0056] (5) Coating preparation, add 1048L of toluene and 2134L of tetrahydrofuran into the mixer respectively, control the temperature at 29°C, under mechanical stirring, slowly add 250Kg of Saran resin, stir mechanically for 62min, gradually increase the temperature to 42°C, and then slowly add E-wax 4.5Kg, behenic acid 4.2Kg and dibutyl phthalate 3.9Kg, stir evenly, then add HK400 anti-tack agent 0.76Kg, stir for 32 mi...

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Abstract

The invention relates to a method for preparing a film, in particular to a high heat seal film prepared by using cotton pulp and wood pulp as materials and a method for preparing the same. The high heat seal film prepared by the method of the invention is degradable and meets the requirement of the environmental protection; moreover, the film also has the advantages of non-toxicity, water vapor proof performance, good oxygen permeability, good heat seal performance and desirable stretching and tensile strength, and can adapt to the automatic high-speed packaging and achieves performance of ensuring the quality and the sanitation of packaged goods.

Description

technical field [0001] The invention relates to a method for preparing a film, in particular to a high heat-sealing film prepared by using cotton pulp and wood pulp as raw materials and a manufacturing method for the high-heat-sealing film. Background technique [0002] Heat-sealing film is one of the basic varieties of BOPP film. It is mainly used for printing, composite bag making or wrapping packaging. It is used for packaging food, textiles, audio-visual products, poker, etc., requiring the film to have good heat-sealing performance, especially Especially when used in packaging food or pharmaceutical industries, the selected packaging film must have good hygienic performance and meet the requirements of the relevant national hygiene standards to ensure that the film will not cause pollution to the packaged goods. [0003] At present, high-heat-sealing films on the domestic market are generally made of plastic materials, and plastic materials are generally prepared from p...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08J7/12C08J7/00C08J7/04C08L1/24C09D127/08B29B7/00B29C41/32B65D65/02B29L7/00B29L9/00
Inventor 陈汉爱王新许丽丽陈玉苹
Owner SHANDONG HENGLIAN NEW MATERIALS CO LTD
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