According to the influence law of the water resistance of biodegradable particles, the optimum modification conditions for preparing SPI biodegradable materials are obtained as follows: the mass volume ratio of SPI and tetrahydrofuran is 1:3, and the modification conditions of SPI biodegradable materials are optimized by orthogonal combination test design; The tensile strength, elongation at break and water absorption of SPI biodegradable material prepared under the optimum conditions are 8.61 MPa, 196.78% and 31.6%, respectively. As a thermoplastic biodegradable plastic, pbat is a copolymer of butylene adipate and butylene terephthalate. It has the characteristics of PBA and PBT, and has good ductility and elongation at break, as well as good heat resistance and impact properties; In addition, it has excellent biodegradability and is one of the most active biodegradable materials in the research of biodegradable plastics and the best market application.

现在的商品包装不仅追求实用性、商业性，而且追求艺术性。塑料包装材料的印刷方式有多种，活版、凹版、丝印、平版印刷在塑料包装中应用广泛。作为包装印刷技术的主流，凹版印刷尤其是凹版印刷也应加强沟通、包装的发展。

Nowadays, commodity packaging is not only practical, commercial, but also artistic. There are many kinds of printing methods for plastic packaging materials, and letterpress, intaglio, screen printing and lithography are widely used in plastic packaging. As the mainstream of packaging printing technology, gravure printing, especially gravure printing, should also strengthen communication and packaging development.

塑料包装袋分类:塑料包装袋种类繁多，规格不确定。所以设计师和制作人往往忽略了包包的制作方式。结果设计稿虽然精美，但成品包装却不尽人意，甚至成为废品。经验告诉我们，只有在了解常用包装产品类型的基础上，才能充分发挥设计思路，淘汰不符合制袋工艺的设计作品，才能设计出实用、完美的成品包装。

Classification of plastic packaging bags: There are many kinds of plastic packaging bags with uncertain specifications. So designers and producers often neglect the way of making bags. Results Although the design draft was exquisite, the finished product packaging was not satisfactory, and even became a waste. Experience tells us that only on the basis of understanding the types of commonly used packaging products can we give full play to the design ideas, eliminate the design works that do not conform to the bag making process, and design a practical and perfect finished product packaging.

塑料产品包装袋按制袋方式方法可分为基于三边封、中底封、立体中封和片料4类。

The packaging bags of plastic products can be divided into four categories according to the method of bag making, which are based on three side sealing, middle bottom sealing, three-dimensional middle sealing and sheet material.

三面密封是用来封住袋子的。正反面尺寸成为成品尺寸，具有一定的整体感，设计不受约束，设计具有一定的连贯性。由于前面和后面的尺寸相同，前面可以先设计，所以后面和前面应该。制版时，背面要排列在同一版滚筒上。常用的原料包括宠物、生物降解、 cpp、 opp、 pa、 al、 kpet 等。三面密封袋有塑料食品包装袋、真空尼龙袋、米袋、立式袋、拉链袋、铝箔袋、茶包等。

The three-sided seal is used to seal the bag. The size of the front and back become the size of the finished product, with a certain sense of integrity. The design is not constrained, and the design has a certain consistency. Because the front and rear dimensions are the same, the front can be designed first, so the rear and front should be. During plate making, the back side should be arranged on the same plate cylinder. Common raw materials include pet, biodegradation, cpp, opp, pa, al, kpet, etc. Three-sided sealed bags include plastic food packaging bags, vacuum nylon bags, rice bags, vertical bags, zipper bags, aluminum foil bags, tea bags, etc.

中间底部密封在背面。正面为成品尺寸，背面分为两等份，两者宽度之和等于正面宽度。通常是正面和背面展开一体设计，左右两边加1cm边，正面和背面也在同一个套准筒上。

The middle bottom is sealed at the back. The front is the finished size, and the back is divided into two equal parts. The sum of the two widths is equal to the front width. Generally, the front and back are integrated, with 1cm edges on the left and right sides. The front and back are also on the same registration cylinder.

立体中封是在中底封的基础上，在两侧加立体边，正背、侧3面同样我们都在使用同一套版滚筒上。

The three-dimensional middle seal is based on the middle bottom seal, adding three-dimensional edges on both sides. We are also using the same set cylinder on the front, back and side.

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Thank you for reading. The source of this article is biodegradable particles. For more information and questions, please click: https://www.swjjkl.com We will continue to work hard to provide you with services. Thank you for your support!