Paper making and fiber liberation – Processes and products – Non-fiber additive
Reexamination Certificate
2001-10-26
2004-11-02
Fortuna, José A. (Department: 1731)
Paper making and fiber liberation
Processes and products
Non-fiber additive
C162S101000, C162S161000, C162S181100, C162S181200, C162S181400, C162S165000, C162S168300, C162S117000, C162S123000, C162S109000, C162S175000, C162S111000, C162S147000, C047S009000, C047S056000
Reexamination Certificate
active
06811653
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a multi-purpose paper, a manufacturing method thereof, and an application thereof.
BACKGROUND OF THE INVENTION
Generally, the agricultural production comprises the steps of soil preparation, sowing, fertilization, hand weeding and harvesting, each of which requires a huge amount of manpower. Particularly, the steps of hand weeding and harvesting are the most manpower-consuming processes. To achieve the purposes of weeding and growing seedling, the farmers conventionally cover a plastic cloth over the land to retard the growth of weeds and use a plastic seedling-growing plate. However, after the crops are harvested or the seedlings are transplanted, the farmer has no ideal way in dealing with the useless plastic cloth and plate. Due to the plastic cloth and plate cannot be decomposed naturally, it tends to cause the second pollution once the plastic cloth and plate are discarded. In addition, the plastic cloth and plate will result in poor water and air-permeability and influence the ecological environment of soil microorganisms, root system of cultivated seedling, and the growth of crops.
The paper product has the advantage of being decomposable in natural environment easily. After achieving the purpose of agricultural producing, it can be naturally disintegrated and integrated as part of soil after plowing so that it has no disadvantages of recycling, handling the discards and environmental pollution as compared to those by traditional plastic cloth and plate. Therefore, it is desired to develop an agricultural paper material to replace the traditional plastic cloth and plate, or the cultivating medium, which it would be an advanced development in the aspects of economic benefits and environmental protection.
The papermaking material comes typically from the natural organic wood fibers, which are also excellent carriers for microorganisms. However, the conventional paper contains large amounts of chemical additives which have nothing to do with the required features of agricultural crops. Thus the conventional waste paper is not suitable to be used in agricultural application of farmland cultivating.
Therefore, if the functional components can be added and adjusted in the papermaking material during the manufacturing process in making the paper product, it cat be sufficiently applied in agriculture as desired. It is therefore an object of the present invention to provide a multi-purpose paper for being applied in agricultural planting and cultivating to solve the problems resulting from weed control, pest control, sowing, growing seedlings, fertilization, fertilizer saving, manpower saving and special cultivating, thereby the agricultural producing possibly becoming a permanent operation.
SUMMARY OF THE INVENTION
It is therefore an object of the present invention to provide a multi-purpose agricultural: paper having the features of non-polluting, biodegrading and strong light-blocking ability so that it can be used as carriers of antagonistic microorganisms for being applied in plant cultivating and being used as functional basic materials to control weeds, control pests, sow seeds, grow seedlings, supply fertilizer, save fertilizer, save manpower and cultivate special species.
According to the present invention, a method of manufacturing the multi-purpose paper comprises steps of (a) providing a papermaking material and obtaining a clean paper pulp by treating the papermaking material, (b) adding at least one functional additive into the clean paper pulp to form the multi-purpose paper, and (c) processing the multi-purpose paper to form thereon an uneven surface structure.
Preferably, the papermaking material is one selected from a group consisting of waste cardboard case fibers, the remaining basic materials after being taken away the bottom surface paper of waste cardboard case, biodegradable plant fibers and polymer fibers.
In accordance with the present invention, the step (b) comprises steps of classifying, pulp-dispersing, coarse pulp-clarifying, fiber-separation, coarse screening, fine-pulp-clarifying, heat-dispersion, fine screening, bleaching, pulp-washing and pulp-refining.
In accordance with the present invention, the functional additive is one selected from a group consisting of Camellia seed cake's powder, calcium carbonate, dry strength agent, wet strength agent, weed control agent, pest control agent and bacterial control agent.
In accordance wit the present invention, the Camellia seed cake's powder is added into the clean paper pulp at 1% by weight for preventing golden apple snails (Pomacea Canaliculata Lamarck) and increasing dispersive level of fibers during manufacturing.
Preferably, the calcium carbonate is added into the clean paper pulp at a dosage based on classification of the papermaking material, sieving ratio of fibers, desired water-absorbing ability and air permeability of the paper for increasing the physical strength of the paper and promoting the proliferation of microorganisms.
Preferably, the weed control agent is one of inorganic and organic packing materials selected from a group consisting of black carbon, silicon dioxide and titanium dioxide.
Preferably, the dry strength agent is one of acidic and neutral agents of one of anionic and cationic ones selected from a group consisting of melamine formaldehyde resin, polymeric amine-epichlorohydrin resin, phenolic resin, glyoxalated polyacrylamide resin) polyacrylamide resin, raw starch, and modified starch.
Preferably, the wet strength agent is one of acidic and neutral agents of one of anionic and cationic ones selected from a group consisting of melamine formaldehyde resin, polymeric amine-epichlorohydrin resin, phenolic resin, and glyoxalated polyacrylamide resin.
Preferably, the uneven surface structure is an embossed structure.
Preferably, the uneven surface structure is a corrugated structure.
Preferably, the multi-purpose paper has a pH value ranging between about 6 and about 7.
Preferably, the multi-purpose paper includes a corrugated paper layer having a basic weight ranged from 90 g/m
2
to 150 up g/m
2
and a surface paper layer having a basic weight ranged from 90 g/m
2
to 300 up g/m
2
in order to have high wet strength, water-preventing ability and water-permeating ability.
Preferably, the multi-purpose paper is a paper substrate with a thickness ranged from 0.2 mm to 0.3 mm.
Preferably, the paper substrate has a water-absorbing ability larger than Cobb, 1 Min, 20 gsm and a wet-rupture strength in longitudinal/transverse direction lower than 1.0 kg/m
2
after 2 hours immersion.
Preferably, the paper substrate has a wet-breaking strength in longitudinal/transverse direction lower than 1.0 kg/m
2
after 2 hours immersion.
Preferably, the multi-purpose paper has an air permeability larger than about 50 sec/100 cc.
Preferably, the multi-purpose paper is rolled up, and cut into a specific shape in use.
Preferably, the paper is directly obtained from a waste cardboard case, and can be used in one of a group consisting of large area fields, home gardening, golf fields, paddy fields and dry farmlands of general or organic farming.
Preferably, the multi-purpose paper can be used in one of domestically cultivating box containing organic soil or organic medium and industrial applications selected from a group consisting of indoor and outdoor net supports, papery recyclable cultivating plate, and artificial indoor planting system with devices of temperature control, cold and hot water pipes, and light control.
Preferably, the uneven surface structure is used for sowing at least a seed thereon, and the method further includes a fixing layer for fixing the seed, wherein the fixing layer comprises manufacturing steps of (a) providing a papermaking material and obtaining a clean paper pulp by treating the papermaking material; and (b) adding at least one functional additive into the clean paper pulp to form the multi-purpose paper.
Preferably, the fixing layer is a thin layer die-cast with at least a lattice for positioning a
Fortuna Jos'e A.
Volpe and Koenig P.C.
Yuen Foong Yu Paper MFG Co., Ltd.
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