TWI723475B - Manufacture method of paper straw - Google Patents

Abstract

The present invention relates to a manufacture method of paper straw, comprising: a paper roll transmission step, a paper heating step, a bonding and forming step and a cutting step. Wherein, a plurality of raw paper rolls face a connection position jointly to be transmitted, the raw paper rolls contain paper material and dry hot-melt adhesive. Heat the raw paper rolls, so the dry hot-melt adhesive in the raw paper rolls is changed into flow hot-melt adhesive. Transmitting the raw paper rolls to the connection position for rolling jointly and the flow hot-melt adhesive glues on another raw paper roll to form a tubular shape. Finally, after the tubular shape constructing a setting length, the tubular shape would be cut to form the paper straw. The present invention uses dry adhesive, without the excessive glue problem and mold phenomenon of the traditional wet bonding method and also without the dry setting process of traditional manufacture process, so the productivity will be raised significantly and reducing the defect rate.

Description

Paper straw manufacturing method

The invention relates to a method for manufacturing a straw, in particular to a method for manufacturing a paper straw made by laminating dry adhesive paper.

With the evolution of food culture and the improvement of material living standards, packaging, canned beverages, and hand-cranked beverages prepared on-site are everywhere. Therefore, the consumption of straws worldwide is very staggering. At present, the most common straw is the production cost. The lowest plastic straws. However, although the plastic straws are convenient to use, they are often thrown away at will after use. It is not easy for subsequent recycling and disposal, which will cause environmental and ecological damage.

In addition, with the rising awareness of environmental protection, in order to solve the problems caused by traditional plastic straws, a reusable metal straw has been introduced. It is common to use stainless steel straws. However, this type of stainless steel straws can be reused. However, since users must carry it with them, it is not conducive to promotion and popularization for consumers who are generally troublesome.

Furthermore, the reuse of stainless steel straws must go through cleaning or disinfection procedures based on hygiene requirements. However, the straw itself has a small diameter and is not easy to clean or disinfect. The general consumer still feels that the sanitary conditions are worrying. Therefore, this kind of At present, the reused metal straw cannot replace the traditional plastic straw.

In view of the fact that metal straws are not convenient to use, another paper straw used to replace plastic straws has emerged. Please refer to Figure 1. The traditional method of manufacturing paper straws is to use three rolls of composite material. The first paper material 90, the second paper material 91 and the third paper material 92 will pass through a gluing machine 93, so that the first paper material 90, the second paper material 91 and the third paper material 92 The contact surfaces between them are respectively coated with food-grade wet glue, and then the first paper material 90, the second paper material 91 and the third paper material 92 are moved together to a winding mechanism 94 for winding The mechanism 94 produces a paper tube 95 with three layers of paper walls from the glue material of the first paper material 90, the second paper material 91 and the third paper material 92 in a spiral winding method, which is subsequently followed by a cutting machine 96 according to the length The paper tube 95 is cut to complete the length of the paper straw, and finally a dryer 97 performs a drying process on the paper straw to solidify the wet glue.

However, at present, when three sheets of paper are laminated with wet glue, the moisture of the outer paper can be discharged during the drying process at the fastest, but the inner paper is affected by the wet glue, which often causes glue overflow. Or the moisture remaining in the paper straws makes the paper straws prone to mold and cause food safety problems.

In addition, in the current wet production method, the operator must have certain experience to reduce the production of defective products. The main reason is that the concentration of the rubber material will change due to the evaporation of water during the long-term production state. The operator must pay attention to the increase at any time. Liquid dilution.

If the liquid component of the glue is too small, the surface of the glue will dry and the viscosity will decrease, resulting in false adhesion and easy delamination of the straw. Conversely, if the glue has too much liquid composition, it will also cause problems such as reduced viscosity and difficult drying. . Therefore, the production efficiency of the traditional wet bonding method cannot be improved, and the product defect rate cannot be effectively improved.

The main purpose of the present invention is to provide a method for manufacturing paper straws using dry adhesive tape, so that the adhesive tape does not have the traditional glue overflow, delamination and mildew during the dry lamination production process, and the dry lamination The adhesive strength is increased by 20%~30% compared with the adhesive strength of wet lamination.

The secondary purpose of the present invention is to use the dry bonding process to solve the additional drying process of the glue material required for the traditional wet bonding, the production speed can be greatly increased, and the defect rate of the paper straw can be effectively reduced.

Another object of the present invention is that dry bonding does not require high operator experience, and can continue production after only setting the production parameters, which greatly reduces the experience requirements of operators and reduces the risk of human improper operation.

In order to achieve the above objective, the paper straw manufacturing method of the present invention includes: a paper roll conveying step, in which a plurality of paper rolls to be processed are collectively conveyed toward a joint position, wherein the paper strip to be processed includes a paper material And a dry hot melt adhesive; a paper strip heating step: heating the paper strip to be processed so that the dry hot melt adhesive of the paper strip to be processed is changed into a fluid hot melt adhesive; a bonding type step: the waiting The processed paper strips are transferred to the joint position and are wound together, and the fluid hot melt adhesives are respectively bonded to another paper strip to be processed to form a tubular body; and a cutting step: after the tubular body is formed into a set length , The tubular body is cut to form at least one paper straw.

The paper straw includes an outer layer of paper, a middle layer of paper, an inner layer of paper, a first hot melt glue between the outer layer of paper and the middle layer of paper, and a layer of paper between the middle layer of paper and the inner layer of paper. The second hot melt adhesive between the materials, the width of the outer paper material is greater than the width of the middle paper material, and the width of the middle paper material is greater than the width of the inner paper material.

The first hot melt adhesive and the second hot melt adhesive include: an acrylic copolymer 40-45%, a water 55-60%, and an ammonia water less than or equal to 0.1%.

The heating temperature of the paper strip heating step is 80°C to 200°C.

In a feasible embodiment, the step of heating the paper strip is performed by using at least one of hot air, infrared rays, heaters or microwaves to perform a heating process before the joining position. In another feasible embodiment, the step of heating the paper strip is to use a heat coiler to perform the heating and bonding processes at the joining position.

In addition, in a preferred embodiment, the paper roll transfer step further includes: a paper gluing step: applying the fluid hot melt glue to at least one surface of the paper to form a processed paper; and a colloid drying step: Drying the fluid hot melt adhesive of the processed paper to change the fluid hot melt adhesive to the dry hot melt adhesive; a paper winding step: winding the processed paper to form a paper batch to be processed; a paper batch cutting step: The paper batch to be processed is cut according to a processing length to form a plurality of paper rolls to be processed.

Furthermore, in another preferred embodiment, before the paper roll conveying step, the step further includes: a paper gluing step: applying the fluid hot melt glue to at least one surface of the paper to form a processed paper; and drying the glue Steps: drying the fluid hot melt adhesive of the processed paper to change the fluid hot melt adhesive to the dry hot melt adhesive; a paper winding step: winding the processed paper to form the paper roll to be processed.

In the foregoing two preferred embodiments, the drying temperature of the colloid drying step is 40° C. to 80° C.; and the paper gluing step adopts one of the methods of knife coating, roller coating, spray coating or curtain coating.

As can be seen from the foregoing description, the present invention is characterized in that the paper strip to be processed is composed of a paper material and a dry hot melt adhesive, and the paper strip to be processed is heated and then wound together to directly bond the paper into a form. The tubular body enhances the adhesive strength between paper materials and avoids the problems of glue overflow, delamination and mildew caused by traditional methods. In addition, the cutting operation is carried out directly after the pasting is completed, without additional gel drying procedures, so that the production speed of paper straws can be greatly increased, and the defect rate of products can be effectively reduced.

10: Paper roll to be processed

11: Paper to be processed

12: Outer paper

13: Middle layer paper

14: inner paper

15: The first hot melt adhesive

16: The second hot melt adhesive

20: heating machine

30: Adhesive molding machine

40: tubular body

50: cutting machine

S1: Paper roll transfer steps

S2: Paper heating step

S3: Adhesive type step

S4: Cutting step

S5: Paper gluing steps

S6: Colloid drying step

S7: Paper winding steps

S8: Paper batch cutting steps

P: Joint position

90: The first paper

91: The second paper

92: The third paper

93: Dipping machine

94: Winding mechanism

95: paper tube

96: Cutting Machine

97: Dryer

Figure 1 is a schematic diagram of a traditional paper straw manufacturing method; Figure 2 is a schematic diagram of a paper straw manufacturing method of the present invention; Figure 3 is a step diagram of the paper straw manufacturing method of Figure 2; Figure 4 is a flowchart of the paper straw manufacturing method of Figure 2; 5 is a cross-sectional view of the tubular body; FIGS. 6A to 6C are schematic diagrams of the tubular body composed of paper strips to be processed in different embodiments; and FIGS. 7A and 7B are flowcharts of different processing before the paper roll transfer step.

In order to facilitate a deeper, clear and detailed knowledge and understanding of the structure, use and characteristics of the present invention, a preferred embodiment is given, and the detailed description is as follows with the drawings: Please refer to Figures 2 to 4, The paper straw manufacturing method of the present invention includes four processing steps: a paper roll conveying step S1, a paper strip heating step S2, a bonding forming step S3, and a cutting step S4.

In the paper roll conveying step S1, a plurality of conveying devices collectively convey a plurality of paper rolls to be processed 10 toward a joint position P to be processed paper strip 11, wherein the to-be-processed paper strip 11 includes a paper material and a drying heat Melting glue; the paper strip heating step S2 is to heat the paper strip 11 to be processed by a heating machine 20, and the heating temperature is 80 ℃ ~ 200 ℃, so that the dry hot melt adhesive of the paper strip 11 to be processed can be changed for A fluid hot melt adhesive; the bonding forming step S3 is to transfer the paper strip 11 to be processed to a bonding forming machine 30 at the joining position P to wind together, and to allow the fluid hot melt adhesives to be respectively bonded to another to be processed The paper strip 11 is used to form a tubular body 40, wherein the bonding molding machine 30 has a cooling shaft surrounded by the tubular body 40; and the cutting step S4 is to wait for the tubular body 40 to leave the cooling shaft to form a setting After the length, the tubular body 40 is moved synchronously by a relatively movable cutting machine 50, and the tubular body 40 is cut to form at least one paper straw.

Please refer to FIG. 5, the paper straw includes an outer layer of paper 12, a middle layer of paper 13, an inner layer of paper 14, and a first hot melt adhesive located between the outer layer of paper 12 and the middle layer of paper 13. 15 and a second hot melt adhesive 16 located between the middle layer paper 13 and the inner layer paper 14, and the width of the outer layer paper 12 is greater than the width of the middle layer paper 13, and the width of the middle layer paper 13 The width is greater than the width of the inner layer paper 14.

Please refer to the different embodiments shown in FIGS. 6A to 6C. As shown in FIG. 6A, the paper straw is coated with the first hot melt adhesive 15 and the second hot melt adhesive on opposite sides of the middle layer paper 13 respectively. 16. Adhere the outer layer paper 12 and the inner layer paper 14 by the middle layer paper 13 respectively.

As shown in FIG. 6B, the paper straw can also be coated with the first hot melt adhesive 15 and the second hot melt adhesive 16 on adjacent sides of the outer layer paper 12 and the inner layer paper 14, and then the outer layer The paper material 12 and the inner layer paper material 14 are adhered to the opposite sides of the middle layer paper material 13 together.

As shown in FIG. 6C, the paper straw can also be coated with a part of the first hot melt adhesive 15 and a part of the second hot melt adhesive 16 from adjacent sides of the outer paper material 12 and the inner paper material 14, respectively, The opposite sides of the middle layer paper 13 are separately coated with the remaining part of the first hot melt adhesive 15 and the remaining part of the second hot melt adhesive 16, and then the hot melt adhesive is combined to form the Paper straw structure.

The paper of the present invention is a general base paper specification. The length of 120g paper is 5000 to 6000 meters, the length of 60g paper is 10000 to 12000 meters, and the width is between 600 to 800 meters; kraft paper and western paper are selected. Various paper such as paper jam. The first hot melt adhesive 15 and the second hot melt adhesive 16 include: an acrylic copolymer 40-45%, a water 55-60%, and an ammonia water less than or equal to 0.1%.

In addition, in the preferred embodiment of the drawings, the paper strip heating step S2 is performed before the joining position P by using at least one of hot air, infrared rays, heaters or microwaves to perform a heating process.

In another feasible embodiment, the paper strip heating step S2 is at the joining position P, using a heat coiling machine that combines the functions of the heating machine 20 and the bonding machine 30 to perform the heating and bonding processes at the same time.

Please refer to FIG. 7A. Before the paper roll transfer step S1, the paper straw manufacturing method of the present invention may further include: a paper material gluing step S5, a gel drying step S6, a paper winding step S7, and a paper batch Cutting step S8 and other four steps.

In the paper gluing step S5, a coating machine applies the fluid hot melt adhesive to at least one surface of the paper to form a processed paper. The coating machine uses one of blade coating, roller coating, spray coating, and curtain coating. the way. In the gel drying step S6, a dryer dries the fluid hot melt adhesive of the processed paper, so that the fluid hot melt adhesive is changed to the dry hot melt adhesive, wherein the drying temperature is 40°C to 80°C. The paper winding step S7 is to wind the processed paper to form a paper batch to be processed with a size larger than the processing requirement. The paper batch cutting step S8 is to cut the paper batch to be processed according to a length required for processing to form a plurality of paper rolls 10 to be processed.

Please refer to FIG. 7B. In another preferred embodiment, the paper straw manufacturing method of the present invention may further include: a paper gluing step S5, a colloid drying step S6, and a paper roll transfer step S1 before the step S1. Paper winding step S7.

In the paper gluing step S5, a coating machine applies the fluid hot melt adhesive to at least one surface of the paper to form a processed paper. Similarly, the paper gluing step S5 uses knife coating and rolling. One of the methods of coating, spraying or curtain coating. The colloid drying step S6 is also performed by a dryer. The fluid hot melt adhesive of the industrial paper is dried to change the fluid hot melt adhesive to the dry hot melt adhesive, wherein the drying temperature is 40°C to 80°C. The paper winding step S7 is to directly wind the processed paper to form the paper roll 10 to be processed that can be processed directly.

S1---paper roll transfer step S2---Paper strip heating step S3---Synthetic step S4---cutting steps

Claims (8)

A method for manufacturing a paper straw includes: a paper gluing step: arranging a fluid hot melt adhesive on at least one surface of a paper to form a processed paper; a colloid drying step: drying the fluid hot melt adhesive of the processed paper to make The fluid hot melt adhesive is changed to a dry hot melt adhesive; a paper winding step: winding the processed paper to form a paper roll to be processed; a paper roll transporting step: a plurality of the paper rolls to be processed are facing a joint Position transmission of a paper strip to be processed, wherein the paper strip to be processed includes the paper material and the dry hot melt adhesive; a paper strip heating step: heating the paper strip to be processed to make the paper strip to be processed dry The hot melt adhesive is changed to the fluid hot melt adhesive; a bonding type step: the paper strip to be processed is transferred to the joint position and wound together, and the fluid hot melt adhesive is respectively bonded to another paper strip to be processed to form A tubular body; and a cutting step: after the tubular body is formed into a set length, the tubular body is cut to form at least one paper straw. The paper straw manufacturing method according to claim 1, wherein the paper straw comprises an outer layer paper material, a middle layer paper material, an inner layer paper material, and a first hot melt located between the outer layer paper material and the middle layer paper material. Glue and a second hot melt glue located between the middle layer paper material and the inner layer paper material, and the width of the outer layer paper material is greater than the width of the middle layer paper material, and the width of the middle layer paper material is larger than that of the inner layer paper The width of the material. The paper straw manufacturing method according to claim 2, wherein the first hot melt adhesive and the second hot melt adhesive comprise: an acrylic acid copolymer 40-45%, a water 55-60%, and an ammonia water less than Or equal to 0.1%. The paper straw manufacturing method according to claim 1, wherein the heating temperature of the paper strip heating step is 80°C to 200°C. The paper straw manufacturing method according to claim 1, wherein the heating step of the paper strip is performed by using at least one of hot air, infrared rays, heaters or microwaves to perform a heating process before the joining position. The method for manufacturing a paper straw according to claim 1, wherein the step of heating the paper strip is at the joining position, using a heat coiler to simultaneously perform heating and bonding procedures. The paper straw manufacturing method according to claim 1, wherein the drying temperature of the colloid drying step is 40°C to 80°C. According to the method for manufacturing a paper straw according to claim 1, wherein the step of gluing the paper material is one of blade coating, roller coating, spray coating or curtain coating.

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