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Fiber sheets and structures comprising fiber sheets

A fiber sheet, fiber technology, applied in the direction of organic non-cellulose fiber, synthetic cellulose/non-cellulose material pulp/paper, inorganic fiber/sheet, etc., can solve the limited water resistance acceptance and strength performance, user experience Poor performance and preference, poor water resistance, etc.

Active Publication Date: 2017-11-28
PAPTIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, they have poor water resistance, they are relatively heavier (compared, for example, to plastics), they are inflexible, their transformation process is slow, their user experience and preference are poor, and they generally have limited strength properties (especially with regard to tearing). crack)
[0004] Additionally, plastic bags made from biodegradable plastics such as polylactic acid or polymerized starch are available, but they have limited water resistance as well as user acceptance and strength properties

Method used

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  • Fiber sheets and structures comprising fiber sheets
  • Fiber sheets and structures comprising fiber sheets
  • Fiber sheets and structures comprising fiber sheets

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0166] Manufacture of fiber sheets

[0167] Fiber sheets were fabricated on a laboratory scale as follows. Softwood fibers and bicomponent synthetic fibers (PES / PE) were mixed in a ratio of 70:30 into a prefabricated foam made of water and polyvinyl alcohol containing a soft latex (polyacrylic acid). Foam lay-up handsheets are made using methods and apparatus employed in the fiberglass industry. The fibrous foam was decanted into handsheet molds and filtered through a mesh using a vacuum chamber. The filtered sheet and mesh were then separated from the mould and pre-dried on a suction table. The suction table has a 5mm width slot which sucks air through the sheet under a vacuum of ~0.2 bar. The series of graphs presented in Figure 8 illustrate the workflow used in the lab-scale development work.

[0168] After drying under constant atmosphere, the sheets were calendered at a nip pressure of 80 bar and a rolling temperature of 60°C using a Gradek laboratory calender.

[01...

Embodiment 2

[0179] Manufacture of bags from fiber sheet

[0180] Fabrication of bags made of fiber sheets is as follows. Fibrous sheets were obtained using the foam lay-up method as described in Example 1. Softwood (pine) fibers and bicomponent synthetic fibers (PES / PE) were mixed in a ratio of 70:30 into a prefabricated foam made of water and polyvinyl alcohol containing a soft latex (polyacrylic acid). After drying under constant atmosphere, the sheet was calendered. Obtained with 10 wt% PVA and latex (total) and had 30 g / m 2 and 80g / m 2 Gram weight fiber sheet. Heat-sealed bags made from fiber sheets. The bag was repeatedly compressed into a pouch and reopened to its original shape, no change in appearance was observed and no damage was observed. The bag can be folded like a sock. exist Figure 9A A photo of the bag is shown in Figure 9B The tear strengths of plastic bags, paper bags, paper and bags made in this example are shown in .

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Abstract

The invention relates to fiber sheets, to structures comprising said fiber sheets and to the use of said sheets. The invention further relates to biodegradable and / or recyclable products comprising said fiber sheets, useful in replacing non-biodegradable products.

Description

technical field [0001] The present invention relates to fibrous sheets, structures comprising the fibrous sheets, uses of the fibrous sheets, and methods of making the fibrous sheets. The present invention also relates to a biodegradable and / or recyclable product comprising said fibrous sheet for replacing non-biodegradable products. Background technique [0002] Polymer products such as plastic packaging materials, plastic bags and other plastic applications have become a serious environmental problem. It is estimated that each EU citizen uses an average of 200 plastic bags per year. If the plastic bag is stored for an average of 20 minutes, it will take about 1000 years to degrade the plastic bag. About 4 million tons of plastic, especially plastic bags, can be found in the oceans every year, where they cause serious damage to marine ecosystems. The new revision of the EU Waste Directive and its implementation at the individual country level aims to reduce the use of pl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H13/10D21H13/28D21H13/36D21H13/40D21H17/20D21H17/36D21H17/37D21H17/57D21H21/14D21F11/00B65D65/46B32B1/00
CPCB65D65/466D21F11/002D21H13/10D21H13/28D21H13/36D21H13/40D21H17/20D21H17/36D21H17/37D21H17/57D21H21/14C08L1/00D21H21/56A45C3/04B32B5/06B32B5/10B32B1/08B32B5/08B32B5/18B65D65/46B32B1/00B65D65/38D21H13/30D21H13/32D21H13/38D21H17/34
Inventor E·托尼艾恩T·穆斯托宁K·金努宁T·耶尔特
Owner PAPTIC
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