TWM636503U - Biodegradable agricultural paper - Google Patents

Abstract

A biodegradable agricultural paper is provided, wherein the biodegradable agricultural paper has a basis weight ranging from 50 g/m2 to 450 g/m2, a thickness ranging from 0.08 to 0.53 mm. The pH value of the biodegradable agricultural paper is greater than or equal to 8, the air permeability of the biodegradable agricultural paper is less than 30 seconds/100 ml, and the ash content of the biodegradable agricultural paper is less than 6 wt%. The agricultural paper has the advantages of maintaining a stable soil environment for farmland, being completely pollution-free and having little environmental load.

Description

biodegradable agricultural paper

This creation is about a kind of paper material, especially about a kind of biodegradable agricultural land paper.

The use of mulching film in general agricultural cultivation can promote the early cultivation and harvest of fruits and vegetables, and it has labor-saving and labor-saving effects on the prevention of diseases and insect pests, pesticide application and field management during cultivation. In the early days, the agricultural mulch film was mainly plastic film, and the use of plastic film covering has many advantages such as easy construction, heat preservation, moisture retention and weed control. However, with the gradual expansion of the coating area, the waste generated is also considerable. Most of the waste plastic films are often left in the farming environment due to the time-consuming and labor-intensive removal process or easy breakage after use. In the future, due to improper landfill treatment and non-environmental protection characteristics such as non-biodegradability, it will become environmental waste, causing environmental burden and other follow-up treatment problems.

Since paper products are easy to decompose in the natural environment, after the purpose of agricultural production is achieved, they can naturally return to nature and become organic matter in the soil. There are no disadvantages such as recycling, waste disposal and environmental pollution. Therefore, if paper products can be researched and developed to replace plastic sheets, seedlings and cultivation materials, it will be a forward-looking development in terms of economic benefits and environmental protection.

This creation provides a biodegradable agricultural paper, which replaces the agricultural plastic film, and has the advantages of maintaining the stability of the agricultural soil environment, being completely non-polluting, and having less environmental load.

The biodegradable agricultural land paper provided by this creation contains a sheet-like structure, the basis weight of the sheet-like structure ranges from 50 grams/square meter to 450 grams/square meter, and the thickness ranges from 0.08 to 0.53 mm. The pH value is greater than or equal to 8, the air permeability is less than 30 seconds/100ml, and the ash content is less than 6wt%.

In an embodiment of the present invention, the tensile strength of the above-mentioned sheet-like structure is 2 to 12 KN/m.

In an embodiment of the present invention, the water absorption height of the above-mentioned sheet-like structure is 3 to 5 mm/10 minutes.

In an embodiment of the present invention, the above-mentioned flake-like structure has light-shielding properties, and the light-shielding properties are above 102%.

In an embodiment of the present invention, the lead content of the above lamellar structure is less than 2000 ppm, the content of arsenic is less than 60 ppm, the content of mercury is less than 20 ppm, and the content of cadmium is less than 205 ppm.

In an embodiment of the present invention, the above-mentioned sheet-like structure can be broken down naturally by digging the soil into the soil.

In an embodiment of the present invention, the above-mentioned sheet-like structure is rolled and cut into a plurality of holes for use.

In order to make the above and other purposes, features and advantages of the invention more comprehensible, the following specific embodiments are described in detail in conjunction with the accompanying drawings.

10: Agricultural land paper

12: Lamellar structure

14: hole

16: Crop

18: Soil

Fig. 1 is a schematic structural diagram of a biodegradable agricultural land paper according to an embodiment of the invention.

Fig. 2 is a schematic diagram of the application of biodegradable agricultural land paper according to an embodiment of the invention.

Fig. 3 is a schematic diagram of the implementation state of biodegradable agricultural land paper according to an embodiment of the invention.

Fig. 1 is a structural schematic diagram of biodegradable agricultural land paper according to an embodiment of the present creation. As shown in Fig. 1, the agricultural land paper 10 is a sheet-like structure 12, and the range of the basis weight of the sheet-like structure 12 is 50 grams/square meter (g/m ² ) to 450 grams/square meter; the thickness of the flaky structure 12 ranges from 0.08 to 0.53 millimeters (mm); the pH value of the flaky structure 12 is greater than or equal to 8; the flaky structure 12 has High air permeability, the air permeability is below 30 seconds/100ml; the ash content of the flake structure 12 is below 6wt%.

According to an embodiment of the present invention, the basis weight of the biodegradable agricultural paper is measured according to the ISO 536 test standard and the thickness is measured according to the ISO 534 test standard. In one embodiment, the sheet-like structure 12 can have different basis weights/thicknesses according to the types of crops, the environment of the agricultural land, and the like.

According to the embodiment of the invention, the pH value of the biodegradable agricultural paper is tested according to the ISO 6588-1 test standard, and the pH value of the flake-like structure 12 is greater than or equal to 8, that is, the agricultural paper 10 of the invention is weakly alkaline. Due to acid rain, industrial pollution, excessive use of fertilizers and other reasons, Taiwan's farmland soil has been acidified for a long time, which reduces the fertility of the soil and affects the growth of crops. The agricultural land paper created in this paper is weakly alkaline, and can be directly poured into the soil after the crops are harvested, and has the effect of effectively resisting soil acidification during the natural decomposition process.

According to the embodiment of this creation, when inspecting the air permeability of agricultural land paper 10, it is the time for detecting 100 milliliters of moisture to pass through the sheet-like structure 12 according to the ISO 5636-5 inspection standard, and the lower the time, the The better the air permeability, the air permeability of the sheet-like structure 12 of the present invention is less than 30 seconds/100 milliliters, which has quite high air permeability.

According to an embodiment of the present invention, the ISO 1762 inspection standard is used to measure the ash content of the lamellar structure 12, and the ash content of the lamellar structure 12 is 6 wt% or less. The fiber raw material of the agricultural land paper 10 of this creation can be clean pulp, also can be waste paper pulp after special treatment. However, it is known that a high content of heavy metal ions exists in the ash in waste paper pulp, and the main sources of heavy metal ions are mineral fillers, plant fiber sources and printing inks. The agricultural land paper 10 of this creation controls the ash content below 6wt%, so the heavy metal content of the agricultural land paper 10 can be effectively controlled, for example: the lead content can be controlled below 2000ppm, the arsenic content below 60ppm, the mercury content below 20ppm, and the cadmium content below 2000ppm. Below 205ppm.

According to the embodiment of this creation, the "biodegradability" refers to the biodegradability test (Biodegradability Test) according to the ISO 14855-1 inspection standard, wherein biodegradation generally refers to the decomposition of microorganisms, the microbial decomposition substances existing in nature, No negative impact on the environment. The degree of degradation is called degradation index. Biodegradable raw materials can be completely decomposed by microorganisms (such as bacteria, fungi, and algae, etc.) into low-molecular-weight organic regeneration raw materials under natural environmental conditions for an appropriate period. The biodegradable agricultural land paper 10 of an embodiment of the invention is used as a sample material for experimentation. The experimental method includes mixing the sample material with the compost inoculum and putting it into a composting container, under certain oxygen, temperature (58 ± 2 ℃), humidity (50-55%), fully composting, and measuring the final release of CO ₂ after the degradation of the sample material for 45 days or 6 months, using the actual CO ₂ release and its theoretical maximum release The ratio of the ratio to represent the biodegradation rate of the sample material. Table 1 below shows the experimental data of the biodegradability test, in which three sets of agricultural land paper 10 are provided as three groups of test samples (#1~3). According to the experimental data, the biodegradation rate of agricultural land paper is over 90%.

Therefore, when the biodegradable agricultural paper 10 of this creative embodiment becomes waste after being applied, it can be directly turned into the soil, and it will be almost completely decomposed in about 6 months in a natural environment, which not only has zero pollution to the environment, but also can gradually replace existing Some plastic products can reduce the number of plastic products that cannot be decomposed, and can save the cost of traditional plastic film recycling.

In an embodiment of the invention, the raw material of the biodegradable agricultural paper 10 is mainly fibers, and the source of the fibers may be general wood fibers or waste paper pulp. Generally recycled fiber (ie waste paper pulp) undergoes a special pulp washing process to minimize the content of possible residual environmental pollution components (such as heavy metal ions) or substances that are likely to cause environmental hazards, which is more conducive to soil loosening and crop cultivation. Specifically, after the recovered paper is processed by equipment such as loose pulp, coarse pulp cleaning, fiber separation, coarse screening, fine pulp cleaning, fine screening, high-speed pulp washing (removal of ash) and pulp refining to obtain clean pulp, Sent to the paper machine to make paper for agricultural land. In one embodiment, the high-speed pulp washing process can effectively improve the cleanliness of raw materials and product applicability, and effectively control the pores between fibers to achieve shielding but effective ventilation to maintain the stability of the agricultural soil environment. In another embodiment, the high-speed pulp washing process can effectively reduce the ash content, so the heavy metal ion content of the biodegradable agricultural paper 10 is extremely low.

Continuing the above description, in one embodiment, during the pulping step, an alkaline agent can be added to help the fibers swell, so the agricultural land paper 10 is weakly alkaline, and the weakly alkaline agricultural land paper 10 is covered on the soil Or into the soil to resist soil acidification.

In yet another embodiment, the tensile strength of the sheet-like structure 12 is 2 to 12 KN/m, wherein the tensile strength is tested according to the ISO 1924 inspection standard. Therefore, the biodegradable agricultural paper 10 of the invention has good tensile strength, which can avoid the occurrence of paper breakage during application.

In yet another embodiment, the water absorption height of the sheet-like structure 12 can reach 3 to 5 mm/10 minutes. This water absorption height is tested according to the ISO 8787 inspection standard. When the biodegradable agricultural paper 10 encounters heavy rain, it will Excellent moisture absorption and drainage ability can prevent the paper from soaking when flooded, and it also has good water retention capacity.

In yet another embodiment, the flake-like structure 12 has a light-shielding property of more than 102%. The light-shielding property is tested according to the ISO 2471 inspection standard. Therefore, the biodegradable agricultural land paper 10 of this creation has a very high High opacity, when covering the soil where crops are grown, it can effectively inhibit the growth of weeds.

Fig. 2 is a schematic diagram of the application of the biodegradable agricultural land paper according to an embodiment of the invention, and Fig. 3 is a schematic diagram of the implementation state of the biodegradable agricultural land paper according to an embodiment of the invention. As shown in Figure 2, the unused agricultural land paper 10 is stored in a roll shape. When in use, a plurality of holes 14 can be cut out corresponding to the planting positions of the crops 16 on the soil 18, rolled and spread over the soil 18 to complete the agricultural land. Laying of the paper 10; and with the growth of the crop 16, as shown in FIG. 3, the crop 16 emerges through the hole 14 to obtain the space for upward growth.

The agricultural land paper in this creative embodiment is mainly used for short-term crops to meet the characteristics of paper. The benefits of using agricultural land paper include inhibiting the growth of weeds, reducing water evaporation, and avoiding rainwater directly washing away crops and soil. In addition, because the biodegradable agricultural paper provided by this creation uses a high-speed pulp washing process to control the ash content to below 6wt%, which greatly reduces the content of heavy metal ions. After the crops are harvested, the agricultural paper can be directly hoeed and turned into the soil Medium, less environmental load, after a period of time The ground paper can be completely decomposed and can conserve the soil, resisting soil acidification, and the agricultural land paper does not need to be recycled. Compared with the traditional plastic film recycling, the processing cost is more advantageous.

Although this creation has been disclosed above with the embodiment, it is not intended to limit this creation. Those with ordinary knowledge in the technical field of this creation can make some changes and modifications without departing from the spirit and scope of this creation. Therefore, the scope of protection of this creation should be defined by the scope of the attached patent application.

10: Agricultural land paper

12: Lamellar structure

Claims (7)

A biodegradable agricultural land paper, comprising a sheet-like structure, the basis weight of the sheet-like structure ranges from 50 grams/square meter to 450 grams/square meter, and the thickness ranges from 0.08 to 0.53 mm. The pH value is greater than or equal to 8, the air permeability is less than 30 seconds/100ml, and the ash content is less than 6wt%. The biodegradable agricultural paper according to Claim 1, wherein the tensile strength of the sheet-like structure is 2 to 12 KN/m. The biodegradable agricultural paper according to Claim 1, wherein the water absorption height of the sheet-like structure is 3 to 5 mm/10 minutes. The biodegradable agricultural paper according to claim 1, wherein the sheet-like structure has light-shielding properties, and the light-shielding properties are 102% or more. The biodegradable agricultural paper according to Claim 1, wherein the lead content of the flake structure is less than 2000 ppm, the arsenic content is less than 60 ppm, the mercury content is less than 20 ppm, and the cadmium content is less than 205 ppm. The biodegradable agricultural paper according to claim 1, wherein the sheet-like structure can be broken down into the soil by machine turning and decomposed naturally. The biodegradable agricultural land paper according to claim 1, wherein the sheet-like structure is rolled and cut into a plurality of holes for use.

Images