CN219288297U

CN219288297U - Biodegradable agricultural paper

Info

Publication number: CN219288297U
Application number: CN202222446018.7U
Authority: CN
Inventors: 陈瑞和; 陈永顺; 蔡顺斌; 赖建甫; 洪晨书
Original assignee: Taiwan Zhonghua Pulp Co ltd
Current assignee: Taiwan Zhonghua Pulp Co ltd
Priority date: 2022-09-15
Filing date: 2022-09-15
Publication date: 2023-07-04
Anticipated expiration: 2032-09-15

Abstract

The utility model provides biodegradable agricultural paper, the basis weight of the agricultural paper ranges from 50 g/square meter to 450 g/square meter, the thickness ranges from 0.08 to 0.53 mm, the pH value is more than or equal to 8, the air permeability is less than 30 seconds/100 milliliters, and the ash content is less than 6 weight percent. The farmland paper has the advantages of maintaining the farmland soil environment stable, being completely pollution-free and having little environmental load.

Description

Biodegradable agricultural paper

Technical Field

The utility model relates to a paper material, in particular to biodegradable agricultural paper.

Background

The cover film is used for common farming cultivation, so that the early cultivation and harvest of vegetables and fruits can be promoted, and the effects of saving labor and effort are achieved for pest control, pesticide application and field management operation during cultivation. The agricultural covering film is mainly made of plastic film, and the plastic film covering has the advantages of easy construction, heat preservation, moisture preservation, weed suppression and the like. However, as the coverage area is gradually enlarged, the generated waste is considerable, most of the waste plastic films are easy to be wasted time and labor or broken after being used, and often remain in the cultivation environment, and the waste is environmental waste due to improper burying treatment and non-environmental protection characteristics such as no biological decomposability, thus causing subsequent treatment problems such as environmental burden and the like.

The paper products are easy to naturally decompose in natural environment, and can naturally return to the nature after the aim of agricultural production is achieved, so that the paper products become organic matters in soil, and the paper products have no defects of recovery, waste treatment, environmental pollution and the like, so that the paper products can be researched and developed to replace plastic tapes, seedlings and cultivation materials, and the paper products are prospective development in economic benefit and environmental protection.

Disclosure of Invention

The utility model provides biodegradable agricultural paper, which replaces an agricultural plastic film and has the advantages of stable soil environment, no pollution and less environmental load.

The biodegradable agricultural paper provided by the utility model has the basis weight ranging from 50 g/square meter to 450 g/square meter and the thickness ranging from 0.08 to 0.53 mm, the pH value of the agricultural paper is more than or equal to 8, the air permeability is less than 30 seconds/100 ml, and the ash content is less than 6wt%.

In one embodiment of the present utility model, the tension resistance of the agricultural paper is 2 to 12KN/m.

In one embodiment of the present utility model, the absorbent height of the agricultural paper is 3 to 5 mm/10 min.

In an embodiment of the utility model, the agricultural paper has a light shielding property of 102% or more.

In one embodiment of the present utility model, the above-mentioned agricultural paper has a lead content of 2000ppm or less, an arsenic content of 60ppm or less, a mercury content of 20ppm or less, and a cadmium content of 205ppm or less.

In an embodiment of the present utility model, the above-mentioned agricultural paper may be naturally decomposed by being turned over by a machine and driven into soil.

In an embodiment of the utility model, the agricultural paper is rolled and cut into a plurality of holes for use.

The foregoing description is only an overview of the present utility model, and is intended to be implemented in accordance with the teachings of the present utility model, as well as the preferred embodiments thereof, together with the following detailed description of the utility model, given by way of illustration only, together with the accompanying drawings.

Drawings

FIG. 1 is a schematic view of the structure of biodegradable agricultural paper according to an embodiment of the present utility model.

FIG. 2 is a schematic illustration of the application of biodegradable agricultural paper in accordance with one embodiment of the present utility model.

FIG. 3 is a schematic illustration of an embodiment of biodegradable agricultural paper according to the present utility model.

Detailed Description

FIG. 1 is a schematic view of a biodegradable agricultural paper according to an embodiment of the present utility model, and as shown in FIG. 1, the agricultural paper 10 is a sheet-like structure 12, and the sheet-like structure 12 has a basis weight in the range of 50 g/square meter (g/m) ² ) To 450 g/square meter; the sheet-like structure 12 has a thickness in the range of 0.08 to 0.53 millimeters (mm); the pH value of the lamellar structure 12 is greater than or equal to 8; the sheet-like structure 12 has a high air permeability of 30 seconds per 100 ml or less; the ash content of the lamellar structure 12 is below 6 wt%.

According to an embodiment of the utility model, the basis weight of the biodegradable agricultural paper is determined according to the ISO536 test standard and the thickness is determined according to the ISO534 test standard. In one embodiment, the sheet-like structure 12 may be configured to have different basis weights/thicknesses depending on the crop type, the agricultural environment, etc.

According to an embodiment of the present utility model, the pH of the biodegradable agricultural paper is measured according to ISO6588-1 test standard, and the pH of the sheetlike structure 12 is 8 or more, i.e., the agricultural paper 10 of the present utility model is weakly alkaline. Soil acidification has long been a problem for Taiwan farmland soil due to acid rain, industrial pollution, excessive use of fertilizers and the like, so that soil fertility retention is reduced and crop growth is affected. The agricultural paper is slightly alkaline, can be directly turned into soil after crops are harvested, and has the effect of effectively resisting soil acidification in the natural decomposition process.

According to the embodiment of the present utility model, in order to test the air permeability of the agricultural land paper 10, the air permeability is better as the time is lower for detecting the time of 100 ml of moisture passing through the sheet-like structure 12 according to the ISO5636-5 test standard, the air permeability of the sheet-like structure 12 of the embodiment of the present utility model is 30 seconds per 100 ml or less, and the air permeability is quite high.

According to an embodiment of the utility model, the ash content of the lamellar structure 12 is measured using the ISO1762 test standard, the ash content of the lamellar structure 12 being below 6 wt%. The fibrous raw material of the agricultural paper 10 of the present utility model may be clean pulp or waste paper pulp after special treatment. However, it is known that high contents of heavy metal ions are present in ash in waste pulp, and their main sources are mineral fillers, vegetable fiber sources and printing inks. The agricultural paper 10 of the present utility model has an ash content of 6wt% or less, and thus can effectively control the heavy metal content of the agricultural paper 10, for example, lead content of 2000ppm or less, arsenic content of 60ppm or less, mercury content of 20ppm or less, and cadmium content of 205ppm or less.

According to the embodiment of the utility model, the "biodegradability" is a biodegradability test (BiodegradabilityTest) according to the ISO14855-1 test standard, wherein biodegradation generally refers to the decomposition of microorganisms, and naturally occurring microorganisms decompose substances without causing adverse effects on the environment. The degradation index, which represents the degree of degradation. Biodegradable materials, under natural environmental conditions of a proper period, can be completely decomposed by microorganisms (such as bacteria, fungi, algae, etc.) to become low molecular weight organic matter renewable materials. The utility model is toOne example biodegradable agricultural paper 10 was used as a sample material for experiments, which involved mixing the sample material with a compost inoculum and placing the mixture into a composting container, and performing sufficient composting under conditions of oxygen, temperature (58.+ -. 2 ℃) and humidity (50-55%) to determine the CO after 45 days or 6 months of degradation of the sample material ₂ With actual CO ₂ The ratio of the released amount to its theoretical maximum released amount represents the biodegradation rate of the sample material. The following table one shows experimental data for a biodegradability test in which three pieces of agro-paper 10 are provided as three sets of test samples (# 1-3). According to experimental data, the biological decomposition rate of the agricultural paper reaches more than 90 percent.

List one

Therefore, when the biodegradable agricultural paper 10 of the embodiment of the utility model is used as waste, the agricultural paper can be directly turned into the soil, and is almost completely decomposed in the natural environment for about 6 months, so that the environment is free from pollution, the existing plastic products can be gradually replaced, the number of plastic products which cannot be decomposed is reduced, and the recovery treatment cost of the traditional plastic film can be saved.

In one embodiment of the present utility model, the biodegradable agricultural paper 10 is made of fiber, and the fiber source may be general wood fiber or waste pulp. The content of the possibly residual environmental pollution components (such as heavy metal ions) or substances which are easy to cause environmental hazard is reduced to the minimum by the special pulp washing process of the common recycled fiber (namely waste paper pulp), thereby being more beneficial to soil loosening and crop cultivation. Specifically, the recovered paper is subjected to equipment treatment such as pulp dispersion, coarse pulp separation, coarse screening, fine pulp separation, fine screening, high-speed pulp washing (ash removal), pulp grinding and the like to obtain clean pulp, and then the clean pulp is sent to a paper machine to be made into agricultural paper. In one embodiment, the high-speed pulp washing process can effectively improve raw material cleanliness and product applicability, and effectively control inter-fiber voids to achieve shielding but effective ventilation to maintain stable soil environment of the farmland. In another embodiment, the high-speed washing process is effective in reducing ash content, so that the biodegradable paper 10 has a very low heavy metal ion content.

In one embodiment, following the above description, an alkaline agent may be added to assist in the fiber bulking during the desizing step, so that the paper 10 is slightly alkaline and the slightly alkaline paper 10 is covered on or driven into the soil to resist soil acidification.

In yet another embodiment, the sheet-like structure 12 has a tensile strength of 2 to 12KN/m, wherein the tensile strength is measured according to ISO1924 test criteria. Thus, the biodegradable agricultural paper 10 of the present utility model has a good tension resistance, and can prevent paper breakage from occurring at the time of application.

In yet another embodiment, the sheet-like structure 12 has a water absorption height of 3 to 5 mm/10 min, which is measured according to the ISO8787 test, and the biodegradable agricultural paper 10 has good water retention capability and can prevent the paper from soaking out when it is flooded by heavy rain.

In yet another embodiment, the sheet-like structure 12 has a light shielding property of 102% or more, and the light shielding property is detected according to the ISO2471 test standard, so that the biodegradable agricultural paper 10 of the present utility model has high opacity and can effectively inhibit weed growth when being covered with soil for crop cultivation.

Fig. 2 is a schematic view of an application of biodegradable agricultural paper according to an embodiment of the present utility model, and fig. 3 is a schematic view of an implementation state of biodegradable agricultural paper according to an embodiment of the present utility model. As shown in fig. 2, the agricultural paper 10 before being used is stored in a roll shape, a plurality of holes 14 can be cut corresponding to the planting positions of crops 16 on soil 18 when in use, and the holes are rolled and spread out to cover the soil 18 to finish the laying of the agricultural paper 10; as the crop 16 grows, as shown in fig. 3, the crop 16 emerges through the aperture 14 to obtain an upwardly growing space.

The agricultural paper of the embodiment of the utility model is mainly applied to short-term crops so as to accord with paper characteristics; benefits of using the agricultural paper include weed growth inhibition, reduced water evaporation, avoidance of direct rain wash of crops, soil, and the like. In addition, the ash content of the biodegradable agricultural paper provided by the utility model is controlled to be below 6wt% by virtue of a high-speed pulp washing process, so that the heavy metal ion content is greatly reduced, after crops are harvested, the agricultural paper can be directly ploughed and turned into soil by a hoe, the environmental load is less, the agricultural paper can be completely decomposed after a period of time and can be used for conserving the soil, the soil acidification is resisted, the agricultural paper does not need to be recycled, and the processing cost of recycling the agricultural paper is more advantageous compared with that of the traditional plastic film.

While the utility model has been described with respect to preferred embodiments, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the utility model, and that any such changes and modifications as described in the above embodiments are intended to be within the scope of the utility model.

Claims

1. A biodegradable agricultural paper having a basis weight in the range of 50 to 450 g/m and a thickness in the range of 0.08 to 0.53 mm, a pH of 8 or more, a permeability of 30 seconds/100 ml or less, and an ash content of 6wt% or less.

2. The biodegradable agricultural paper according to claim 1, characterized in that the agricultural paper has a tensile strength of 2 to 12KN/m.

3. The biodegradable agricultural paper according to claim 1, characterized in that the agricultural paper has a water absorption height of 3 to 5 mm/10 min.

4. The biodegradable paper for agricultural land according to claim 1, wherein the paper for agricultural land has a light shielding property of 102% or more.

5. The biodegradable agricultural paper of claim 1, wherein the agricultural paper has a lead content of 2000ppm or less, an arsenic content of 60ppm or less, a mercury content of 20ppm or less, and a cadmium content of 205ppm or less.

6. The biodegradable agricultural paper of claim 1, wherein the agricultural paper is adapted to be naturally decomposed by being driven into soil by machine turning.

7. The biodegradable agricultural paper according to claim 1, wherein the agricultural paper is rolled and cut into a plurality of holes for use.