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Corrugated board processing adhesives
Corrugated board processing is the largest amount of adhesive in the packaging industry. Most of the adhesives currently used are self-made thermosetting starch adhesives. There are also a few manufacturers with insufficient equipment capacity or using cold corrugation molding technology using synthetic resin or oxidized starch binders.
Heat-curing starch adhesives are self-adhesives made by paperboard manufacturers using starch, caustic soda and borax, which are used to promote adhesiveness of adhesives by high temperature to achieve cardboard bonding.
Starch can be extracted from corn, wheat, rice, potatoes, tapioca, sago, peas and even bananas. Corn starch is the most widely used type of starch in the paper products industry. Earlier, some large foreign-funded enterprises in South China used imported cassava starch to make paste, and the ready-made has been gradually replaced by corn starch.
In recent years, with the advent of new types of high-speed wire and cable equipment that can automatically adjust the amount of paste, the use of wheat starch, which has a low cost and a low gelatinization temperature, is increasingly used. Potato starch and other special starches are mainly used for the bonding of top paper in heavy duty cardboard.
As the continuous improvement of corrugated board line speed, better and better base paper performance, and the quality requirements of adhesives have also changed, the main trends are as follows:
The solid content of adhesives is getting higher and higher;
The initial tack time is accelerated;
Low viscosity;
The gelatinization temperature drops;
Widespread use of paste additives.
Corrugated veneer with adhesive
The amount of adhesive used in corrugated veneers is second only to the corrugated board processing technology. At present, there are three types of calyx base, synthetic resin and starch adhesive on the market.
The silicate also called water glass, its adhesive strength is still acceptable, but there are major defects such as slow drying speed, easy efflorescence, easy to absorb moisture and damage to the carton performance, and it was banned by the national foreign trade department in 1986. .
Synthetic resin adhesive is made by adding polyvinyl alcohol to water, dissolving and stirring, and blending with polyvinyl acetate emulsion. Due to the scarcity of materials, high cost, and high energy consumption, its market share is rapidly declining. In stark contrast to this, starch adhesives quickly occupied the market due to its many advantages such as fast initial adhesion, firm bonding, good water resistance, low cost, and environmental protection. It can be said that, in the foreseeable future several decades, unless there is newer material appearing, water glass will completely withdraw from the market, and the starch adhesive will occupy most of the market share. Synthetic resin will only become an inevitable trend for the development of the adhesive market.
Starch adhesive is the most ideal adhesive. It is made of starch as the main raw material and is mixed with other auxiliary materials. It has many advantages such as fast initial adhesion, firm adhesion, good water resistance, low cost, and environmental protection. The preparation method of the starch binder is an oxidation method, which is characterized in that the starch is oxidized by an oxidant such as hydrogen peroxide, sodium hypochlorite, etc. to degrade it and then gelatinized. However, what is slightly lacking is that the PH value reaches about 12, which has a certain corrosive effect on human skin.
With the continuous deepening of people's understanding of starch binders, the surface coating with starch adhesives presents two distinctly different trends. One is a low-solids, low-price adhesive with a solids content of less than 10%, a price of about 500 yuan/ton, and a slow drying speed. It is suitable for poor paper quality and uses a manual single-side or low-speed coating machine. Covered factory use. However, its disadvantages are also very obvious. Due to the low solid content, in order to ensure the bonding quality, the amount of glue is generally large, so the drying after coating is slow, and cardboard softness, warping and the like are prone to occur. Therefore, this product is limited to the use of some low-end products in China; the other is a high-solid-content, high-priced adhesive with a solids content of over 18% and a price of 700-900 yuan per ton. Its characteristics are excellent adhesion, fast drying speed, small amount of glue, and high hardness of the cardboard after covering, without bending. It is suitable for use in factories where the quality of the base paper is good and the product quality is high.
In the Pearl River Delta and some of the Yangtze River Delta where the packaging industry is developed, due to the large number of packaging manufacturers and the developed traffic, the glue is generally purchased directly from professional adhesive manufacturers. This avoids the tedious process of formulating glue and the resulting instability. In other parts of the country, due to the decentralized packaging companies, and the small scale, basically the use of raw materials purchased to prepare their own way.
Paste box adhesive
Paste cartridges are used for the combined molding of paper (box) boxes with adhesives. The usual bonding sites are cardboard side strips, and a few also include bottom flap bonding. At present, there are numerous types of binders used in the industry for adhesives in the industry, and the price difference is very different. There can be targeted selection when purchasing, so as to avoid wasting costs.
At present, white latex is the most widely used glue in the carton bonding process and is generally used for the adhesion of surface coatings (except UV coating) or plain carton without any treatment on the surface. For the carton without any treatment on the surface, the price of white latex used in the hand-bonding process has been as low as RMB 2,000/ton, and the machine adhesion is due to the higher requirements on the initial adhesion and drying speed of the glue, and the price is more than RMB 5,000/ton. Above white latex. At present, a new type of rubber powder has appeared on the market. The cost of glue for machine gluing has dropped to about 2,500 yuan/ton, while the cost for hand-glued glue is even lower to 1,600 yuan/ton, and the effect is better than 5,000 yuan/ton. emulsion. Cartons with gloss sticks are made of white latex at a price of RMB 8,000/ton or more, and are mostly hand-bonded.
Among the many adhesives, the hot-melt adhesive has the shortest drying time, and hot-melt adhesives should be used for the adhesive forming process that requires instantaneous drying and curing. Hot-melt adhesives are particularly suitable for bonding processes between plastic foams or EPE materials and paper. They not only dry quickly but also have a very strong bond. Hot melt adhesives have a wide range of applications and can be used for bonding paper products of any material and surface treatment process, and are also suitable for manual and machine bonding processes. However, the disadvantage of hot-melt adhesives is that the cost is too high. Generally, the price per ton is more than 10,000 yuan, and it must be heated and melted when used.
The special UV box glue box glue is suitable for the paper products with UV varnish on the surface, and its adhesive needs special attention. To be on the safe side, the first use of base oil, and then UV glazing, and finally the use of special UV box glue box glue adhesive method. Hot melt adhesive bonding can also be used. Special coating box glue box glue is suitable for paper products with surface treated by coating. Hot-melt adhesives can also be used for bonding paper-coated paper products. The price of special UV box glue box glue and box glue box glue box are all above 10,000 yuan / ton.
Cardboard veneer adhesive
Gift boxes, albums, photo albums, paper stationery, paper display stands, greeting cards, and other types of cartridges. After the die-cut coated paper color surface and die-cutting cardboard are pasted and combined, the process is currently applied. Most of the adhesives used are white latex and hot melt adhesives. Because the coated paper is difficult to infiltrate and has strong tensile resistance during the wrapping process, the initial adhesion, solid content and permeability of the glue are required to be very high. At present, the price of white latex used is generally around 5,000 yuan/ton, while the hot melt adhesive is up to 10,000 yuan/ton. Hot-melt adhesives are generally used in cases where one side of the adhesive surface is subjected to UV coating or a lamination process.
Paper tubes, paper corners, paper pallets and adhesives for paper furniture
In the past, due to the limitation of drying speed and adhesive strength, the bonding of paper tubes, paper protection corners and paper pallets basically used synthetic resin adhesives, and the price was generally between 4000-6000 yuan/ton. With the continuous advancement of starch adhesive technology, many starch adhesives newly launched on the market have the same drying speed and adhesive strength as synthetic resin adhesives, while the cost is about RMB 2,000/ton, and thus gradually become starchy. The adhesive is replaced.
Coating adhesive
At present, most of the adhesive products used in the market are solvent-based polyurethane adhesives. In view of the harmful effects of solvents on human bodies, there are potential fire hazards during use. Some manufacturers have developed environmentally friendly, non-flammable, non-toxic, and widely adaptable waterborne environments. Polyurethane adhesives. However, its adhesive strength is lower than the solvent type, the drying speed is slow, the energy consumption and the cost are high, and the development prospect is not optimistic. Recently, foreign companies have also produced solvent-free polyurethane adhesive products. Solvent-free polyurethanes are environmentally friendly products in the true sense of the word. They have strong peeling power, low energy consumption, and a wide range of applications. Therefore, they must be rapidly promoted in the market.
With the increasing environmental protection concepts of people and the increasingly fierce competition in the paper products industry, adhesives in the paper products industry have seen a clear trend of change. In other words, green adhesives, low cost, fast initial viscosity, and firm adhesive starch binders will occupy a greater proportion in various paper product technologies, and the market share of white latex will further shrink, while hot melt adhesives and UV adhesive cartridges Special glues, such as glues and coated glues, will be limited to their exclusive use.
Source: Corrugated boxes
Animal series keyrings, a variety of types, can be customized according to customer needs of different animal series keyrings. Its main materials are wool fabric and polypropylene cotton filler. There are four main types of plush fabrics. The first common yarn, made of BOA material, can be divided into light yarn, usually straight yarn, and can be divided into yin and Yang yarn in different directions. And matte gauze is matte color, basically without both yin and yang. The second kind of yarn is called special yarn. It has sheets and long short wool. The length of wool is controlled at 4-20 mm. The third kind is called wool, wool grows in the range of 20-120 mm, can do any wool growth in the range of 20-45 mm, more than 45 mm is only 65 mm and 120 mm, belongs to long hair, wool is straight, not easy to curl. The fourth type is curly hair, usually granular hair, wool or curly hair. Polypropylene cotton, commonly known as baby cotton, hollow cotton, also known as cotton, chemical fiber man-made materials polypropylene, polypropylene (a plastic optical density, special attention to polyester can not be confused) from the technological differences: mainly hollow fiber and two kinds, respectively: good elasticity of products, smooth feel. The Plush key chain produced by our company is beautiful and generous, durable, three-dimensional, bright and compact. Products can be made according to customer requirements of different specifications, colors, thickness, grade, packaging, etc. Marks can be customized, is a good choice for promotional gifts. Animal series Keyrings can not only decorate your life, but also highlight your nobility. What kind of Keychain a person uses, you can see his personality, life and hobbies, you can also see who can bring you good luck.
Major description:
1. Cloth ordering: in modern society, there is a clear division of labor, and manufacturers have their own responsibilities for the manufacturing of cloth and the production of doll products. Production problems tend to occur in non-factory processes. For this reason, it is particularly important for us to control the quality of materials. We strictly select several fixed material cooperative factories, which not only ensure the richness of material color, but also control the stability of material quality.
2. Making knife mold: the time required for making the knife mold of plush dolls is short, and it only takes a few hours from the start of making to the official use of the knife mold. Come on! Low price! Fashion! It has become an important factor for most companies to choose plush dolls as promotional gifts, conference gifts and event souvenirs.
3. Fabric opening: there are four ways to open the plush doll: punching machine, laser, electric shearing, and thermal shearing. Punch material opening needs to unfold the whole roll of cloth lamination first. The more layers there are, the lower the material opening cost will be. In the industry, generally, the 28 to 33 layers shall prevail. The factory will be subject to the 28 floor, in each process in strict accordance with the standard implementation to ensure the large cargo and sample effect of the anastomosis.
4. Electric embroidery and silk-screen printing: electric embroidery and silk-screen printing are the main presentation forms of logo or pattern on the customized figures; Silk-screen printing is a printing process, most of the cases are not necessarily electric embroidery looks high-grade. However, electrical embroidery cannot completely replace silk screen printing. For example, small and complex patterns or logo electrical embroidery cannot be realized. Only silk screen printing can show fine and clear patterns. For example, some parts of the requirements to make patterns at the same time to avoid the hardening of the parts affect the appearance (electrical embroidery will lead to the hardening of the parts), then also need to choose the process of electrical embroidery to show the logo or pattern. Of course, we don't have to worry about which process to choose to show our logo. We will provide professional solutions according to the actual situation.
5. Stitching and cutting: stitching is a process of stitching all cut pieces together, which is one of the most important processes in all processes. Whether the sewing process is strictly in accordance with the standardization will directly affect the smoothness of the appearance of the doll; Our factory has established strict sewing standards. A. Sewing seam 45 mm, uniform stop, needle spacing 12 inches. B. Fine needle with 11# needle and 402 fine thread. C. All point positions and bone positions must be aligned and shall not be exploded.
6, rolling cotton: cotton seems to be a simple process, in fact, is a very important process; Indeed, it is very easy to learn cotton, a new master as long as five minutes can learn to cotton. But it's not easy to do the simple job of making cotton well. Cotton is not only to cotton into the doll's shell inside, cotton also needs to be flushed evenly, to ensure that the finished product is a round full appearance. Simple things can be repeated to become an expert, to become a cotton expert needs at least three years to accumulate; And I plant all the cotton puncher is more than five or six years of experts.
7, sewing manual: sewing, manual, is the final process of plush toys finished products; Each doll in the cutting stitching stage will leave a position without stitching, the position is commonly known as leather or cotton left mouth position, as the name suggests is reserved for leather and cotton. And this position can only wait until the cotton is finished after the manual suture.
8. Product quality inspection: the product quality inspection is the last quality control link. After the product passes the quality inspection, it becomes the final product to be delivered to the customer. As a product quality inspector, I need not only the carefulness to find out product defects comprehensively, and the technology to repair defects, but more importantly, a sense of responsibility and a mindset that customers will not be satisfied if I am not satisfied.
Company products to environmental protection materials, exquisite technology, various supporting facilities, advanced technology, perfect management, excellent quality, reasonable price, rapid development, strict confidentiality, perfect after-sales service. Only detailed product drawings (or samples) are required to provide customers with one-stop service from development to after-sales service.
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SHEN ZHEN HAO XIAN LONG TECHNOLGY.CO.,LTD , http://www.haoxianlongtoys.com