Patent Application
20210076855
The present invention relates to a paper material for producing paper straw, especially for a paper structure being coated with adhesive and dried before rolling.
The cuisine culture is evolved and the living standard is improved, package drinks, canned drinks and hand-shaken drinks that made on the spot are everywhere. Therefore, the global consumption of straw is tremendous. The lowest cost plastic straw is the most common straw now; although the plastic straw is convenient, however, it's hard to recycle because user usually litters the plastic after using. This situation will destroy the ecological environment.
The awareness of environmental protection is raising, a reusable metal straw is invented to solve the problem that the traditional plastic straw cause, the metal straw is produced by stainless steel mostly. The advantage of the metal straw is the reusability, however, the metal straw is hard to be popularized to general consumer that wishes convenience because the user has to carry it all the time.
Further, the stainless steel straw needs to be washed or disinfected before reusing it for hygiene. But the aperture of stainless steel straw is too small to clean or disinfect easily, so general consumer worries about the hygiene situation. Therefore, the reusable metal straw can't replace the traditional plastic straw now.
Considering the inconvenience of using metal straw, another paper straw is invented for replacing the plastic straw. Please refer to
The general manufacture method in present is using a single paper material, without coated by any glue material, to process the manufacture of coating wet glue afterwards. Therefore, when the wet glue material coating the three paper material, the paper straw mold easily and result the problem in food security because of the exclusive glue problem, the straw layer falls off easily and the situation that the water remains in the paper straw.
Moreover, the glue material concentration of traditional wet paper material is changed in the long-term manufacture status because of the water evaporation, so the operator needs to watch out for diluting water into the traditional wet paper material. If the liquid ingredient of the glue material is not enough, the surface of the glue material will be dry and reduce the viscosity, causing pseudo attachment and the layer of straw falls off easily. On the contrary, if the liquid ingredient of the glue material is too much, the viscosity will be reduced as well and hard to dry. As a result, it is necessary to improve the paper material used by paper straw.
A primary object of the present invention is providing a dry paper material, the paper material presents a dry status when the a special hot-melt adhesive material being provided on it. While producing paper straw afterwards, the traditional excessive glue problem, falls off easily problems and mold phenomenon won't be happened, and the viscosity is higher 20%˜30% than the traditional wet adhesive paper.
A second object of the present invention is preventing the adhesive drying process that the manufacture method of traditional paper straw must have, so the production speed can be accelerated significantly and the defect rate of paper straw production can be reduced.
To achieve the above and other objects, the present invention exposes a paper material for producing a paper straw mainly, the paper material includes: a paper and a hot-melt adhesive material. The hot-melt adhesive material is provided on at least one surface of the paper, includes an acrylic acid copolymer 40%˜45% w/w, an ammonia water less than 0.1% w/w or equal to 0.1% w/w and a water 55%˜60%. w/w The hot-melt adhesive material is presented as a dry hot-melt adhesive without viscosity and being transformed to a flow hot-melt adhesive with viscosity while being heated from 80° C.˜200° C.
Wherein, the dry hot-melt adhesive includes a dry adhesive on the outer surface and a flow adhesive being covered by the dry adhesive completely. The dry adhesive presents a status without viscosity and the flow adhesive presents a status with viscosity. The dry adhesive is broken after being heated, making the flow adhesive overflows the dry adhesive and mixing with the dry adhesive to form the flow hot-melt adhesive. The flow hot-melt adhesive exhausts the water to form a solid hot-melt adhesive after being heated for 0.1 second˜60 seconds.
Moreover, the present invention exposes a paper straw, including: an outer paper layer, a middle paper layer, an inner paper layer and two hot-melt adhesive materials. One of the two hot-melt adhesive materials is connected between the outer paper layer and the middle paper layer, the other of the two hot-melt adhesive materials is connected between the middle paper layer and the inner paper layer. The hot-melt adhesive material includes an acrylic acid copolymer 40%˜50% w/w, an ammonia water less than 0.1% w/w or equal to 0.1% w/w and a water 55%˜60% w/w. The hot-melt adhesive is presented as a dry hot-melt adhesive without viscosity and being transformed to a flow hot-melt adhesive while being heated from 80° C.˜200° C.
Wherein, the dry hot-melt adhesive includes a dry adhesive on the outer surface and a flow adhesive being covered by the dry adhesive completely. The dry adhesive presents a status without viscosity and the flow adhesive presents a status with viscosity. The dry adhesive is broken after being heated, making the flow adhesive overflows the dry adhesive and mixing with the dry adhesive to form the flow hot-melt adhesive.
The flow hot-melt adhesive exhausts the water to form a solid hot-melt adhesive after being heated for 0.1 second˜60 seconds. The width of the outer paper layer is larger than the width of middle paper layer and the width of the middle paper layer is larger than the width of inner paper layer. In a operable embodiment, the size difference of width between the outer paper layer, the middle paper layer and the inner paper layer is 0.5 mm.
The characteristic of present invention is the combination of hot-melt adhesive material's ingredient percentage, transferring the hot-melt adhesive from a dry hot-melt adhesive without viscosity to a flow hot-melt adhesive with viscosity, so the traditional excessive glue and fall-off problem and mold phenomenon won't happen while producing the paper straw afterwards. Moreover, the present invention paper straw preventing the traditional adhesive drying process, raises the production speed of paper straw and reduces the defect rate of producing paper straw.
The structure and the technical means adopted by the present invention to achieve the above and other objects can be best understood by referring to the following detailed description of the preferred embodiments and the accompanying drawings, wherein:
The present invention will now be described with some preferred embodiments thereof and by referring to the accompanying drawings for realizing the structure, usage and characteristic of the present invention better.
Please refer to
The structure of paper material 10 includes a paper 11 and a hot-melt adhesive material 12 being provided on at least one surface of the paper 11. The hot-melt adhesive material 12 includes an acrylic acid copolymer 40%˜45% w/w, an ammonia water less than 0.1% w/w or equal to 0.1% w/w and a water 55%˜60%. w/w Wherein, the hot-melt adhesive material 12 is presented as a dry hot-melt adhesive without viscosity at first, transformed from the dry hot-melt adhesive 13 to a flow hot-melt adhesive 14 with viscosity while being heated in 80° C.˜200° C.
As shown in the drawing. The dry hot-melt adhesive 13 includes a dry adhesive 131 on the outer surface and a flow adhesive 132 being covered by the dry adhesive 131 completely. The dry adhesive 131 is broken after being heated, making the flow adhesive 132 overflows the dry adhesive 131 and mixing with the dry adhesive 131 to form the flow hot-melt adhesive 14.
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Wherein, the width of the outer paper layer is larger than the width of the middle paper layer 22, the width of the middle paper layer 22 is larger than the width of the inner paper layer 23. In an operable embodiment, the size difference of width between the outer paper layer 21, the middle paper layer 22 and the inner paper layer 23 is 0.5 mm.
Similarly, the dry hot-melt adhesive includes a dry adhesive on the outer surface and a flow adhesive being covered by the dry adhesive. The dry adhesive presents a status without viscosity and the flow adhesive presents a status with viscosity. The dry adhesive is broken after being heated, so that the flow adhesive overflows the dry adhesive and mixing with the dry adhesive to form the flow hot-melt adhesive.
The flow hot-melt adhesive exhausts the water to form a solid hot-melt adhesive after being heated in 80° C.˜200° C. for 0.1 seconds˜60 seconds, so that the opposite sides of the solid hot-melt adhesive are bonded to two of the outer paper layer 21, the middle paper layer 22 and the inner paper layer 23.
