Full-biodegradable lamination composite paper material and preparation method thereof

An all-biological and composite paper technology, applied in paper coatings, special paper, chemical instruments and methods, etc., can solve the problems of poor barrier properties of materials, low production efficiency of sticky rolls, etc., and achieve excellent barrier properties, strong Brownian motion, good The effect of melt fluidity

Active Publication Date: 2021-09-07
RACHEM CHINA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the deficiencies in the prior art, the purpose of the present invention is to provide a fully biodegradable composite paper material, which uses biodegradable bonding materials instead of traditional chemical adhesives to be used in the compounding of paper-plastic composite paper to reduce the residue of toxic and harmful substances ; and through the composite method of paper and film, it avoids the disadvantages of low production efficiency and poor material barrier property of easy-sticking rollers caused by single-layer coating of PBAT resin

Method used

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  • Full-biodegradable lamination composite paper material and preparation method thereof
  • Full-biodegradable lamination composite paper material and preparation method thereof
  • Full-biodegradable lamination composite paper material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] A fully biodegradable film-coated composite paper comprises: a base paper layer 1, an adhesive layer 2, and a film layer 3.

[0062] The base paper layer is kraft paper with a grammage of 80g / m 2 .

[0063] The film layer is a fully biodegradable film made of fully biodegradable material A by blown film. The fully biodegradable material A has the following composition: PBAT-1, 60%, in the polymer, the molar ratio of the repeating unit x comprising A units accounts for 48% of the sum of the repeating units x and y, and the melt index 3g / 10min (2.16kg, 190°C), melting temperature T m The temperature is 120°C, the number average molecular weight Mn is 60000-65000, the weight average molecular weight Mw is 130000-140000, the Tg is -33°C, and the Tc is 42°C; mixed resin-1 is PLA: 10%; mineral powder is calcium carbonate: 29.8 %, 3000 mesh; the compatibilizer is Joncryl ADR 4468: 0.2%.

[0064] The above-mentioned fully biodegradable film is prepared by the following meth...

Embodiment 2

[0077] A fully biodegradable coated composite paper, the structure and process flow are the same as in Example 1

[0078] The base paper layer is white cardboard with a grammage of 250g / m 2 .

[0079] The fully biodegradable material A has the following composition: PBAT-1, 80%, in this polymer, the molar proportion of the repeating unit x comprising A units accounts for 50% of the sum of the repeating units x and y, and the melt index is 4.6 g / 10min (2.16kg, 190℃), melting temperature T m The temperature is 125°C, the number average molecular weight Mn is 60000-65000, the weight average molecular weight Mw is 130000-140000, the Tg is -30°C and the Tc is 45°C; the mixed resin-1 is a combination of PLA: 10% and PBS: 5%; ore The powder is calcium carbonate: 4.7%, 2500 mesh; the compatibilizer is KL-E4370: 0.3%.

[0080] The film is blown by a film blowing machine to obtain a fully biodegradable film with a thickness of 30 μm and a width of 1000 mm.

[0081] The temperatures ...

Embodiment 3

[0088] A fully biodegradable coated composite paper, the structure and process flow are the same as in Example 1

[0089] The base paper layer is white cardboard with a grammage of 120g / m 2 .

[0090] Fully biodegradable material A is composed of the following: PBAT-1, 60%, in this polymer, the molar ratio of the repeating unit x including the A unit accounts for 51% of the sum of the repeating units x and y, and the melt index is 3.9 g / 10min (2.16kg, 190℃), melting temperature T m The temperature is 123°C, the number-average molecular weight Mn is 70,000-75,000, the weight-average molecular weight Mw is 140,000-150,000, the Tg is -28°C, and the Tc is 52°C; the mixed resin-1 is a combination of PHA: 10% and PGA: 4.5%; Mineral powder is kaolin: a combination of 15% and 10% silica, both of 4000 mesh; compatibilizer is Joncryl ADR 4370F: 0.5%.

[0091] The film is blown by a film blowing machine to obtain a fully biodegradable film with a thickness of 50 μm and a width of 1200...

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Abstract

The invention discloses a full-biodegradable lamination composite paper material and a preparation method thereof. According to the full-biodegradable composite paper material disclosed by the invention, the biodegradable binding material is used for replacing a traditional chemical adhesive to be applied to compounding of laminated composite paper so as to reduce residues of toxic and harmful substances; and through a mode of compounding the paper and the film, the defects of easiness in roll sticking, low production efficiency and poor material barrier property caused by laminating PBAT resin on a single paper surface are overcome. According to the invention, all the parts are made of full-biodegradable materials, so that the whole body has good biodegradability. After being discarded, the material can be fully biodegraded in the natural environment and does not pollute the environment. The relative biological decomposition rate is greater than or equal to 90%.

Description

technical field [0001] The invention belongs to the technical field of film-coated composite paper materials, and relates to a fully biodegradable film-coated composite paper material and a preparation method thereof. Background technique [0002] Coated composite paper is a composite material in which plastic particles are coated on paper through an extruder and then plastic film is composited with it. The main feature is that this composite material is oil-proof, relatively waterproof, and heat-sealable. The film layer used in traditional coated paper products is made of polyethylene or polypropylene, which is the root cause of "white pollution". As a new class of materials, biodegradable materials have good biodegradability and processing properties. [0003] A PLA (polylactic acid) coated paper developed in the industry, PLA is biodegradable, non-toxic, and can achieve environmental protection effects, but PLA is brittle, poor in toughness and impact resistance, and poo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H27/30D21H23/64D21H19/38D21H19/40D21H19/44D21H19/62C08L67/02C08L67/04B29D7/01B29C48/92B29C48/08B32B27/32B32B27/10B32B29/00
CPCD21H27/30D21H23/64D21H19/385D21H19/40D21H19/44D21H19/62C08L67/02B29D7/01B29C48/92B29C48/08B32B27/32B32B27/10B32B29/00C08L2201/06C08L2205/025B29C2948/92704C08L67/04
Inventor 刘念平沈子铭王宇航王贺宜赵燕超董栋张宁
Owner RACHEM CHINA CO LTD
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