Nonstretchable flat bag machine is a kind of sophisticated high-end bag making equipment, which has tension-free flat forming tension, no deformation and no protective fabric structure compared with traditional bag making equipment. Suitable for most high precision, high quality woven packaging bag materials. Unlike traditional tensile bag machine, which can only process common low-end woven materials, non-tensile equipment has high compatibility and high tolerance for processing, especially for special materials with high tensile, deformation, coating and precision. It is the core of the current high-end packaging production lines. When choosing equipment, many manufacturers often confuse the material's compatibility range, which leads to a high defect rate and damages the material's performance. This paper introduces in detail the materials, causes and application scenarios of non-extendable bag making machine.
BOPP-coated PP knitting material is the core and mainstream material of non-extendable flat-bag machine, which is the main material of feed packaging and pet food packaging. BOPP laminated braided material is composed of PP braided base and a BOPP biaxially oriented film composite. The surface film is thin, dense and has limited toughness. The strong drag force of traditional tensile bag maker can easily cause the dislocation, blistering, peeling and wrinkling between the film and the woven layer, which directly destroys the moisture-proof, dust-proof and fresh-keeping fastness of the packaging bag. Extensionless bag making process has no external pulling or stretch, the fabric is evenly spread, uniform speed transmission, the perfect protection of the integrity of the coating structure, so that the coating and weaving layer closely together, to maintain the original sealing and protective performance of the material to the maximum extent, and the finished product has been smooth, non-deformation processing. It is a special adaptation equipment for the production of woven bag coating.
The new high density woven material of pure PP is also the key material of this equipment. The new pure polypropylene woven material has the characteristics of high density, uniform filaments, strong toughness and high hardness. This kind of material has high cost and strict requirements for forming accuracy and structural integrity. Traditional drawing process forces the warp and weft structure, causes the gap of weaving to be disturbed, the box size deviation, destroys the material's original high strength load-bearing performance. It is easy to crack and deform when used under heavy load. stretching process can maintain the regular structure of pure material weaving layer without damaging the toughness and tensile strength of the material. The bags have uniform load-bearing, tear and abrasion resistance, and take full advantage of the performance advantages of the new pure material.
Color printing and color film composite weaving materials must be processed using non-tensile flat bag making machine. Woven fabrics with colored printing layers and colored film overlay have limited adhesion between surface patterns and colored film coating. Traditional drawing and feeding processes will cause the printing layer to be stretched and deformed, the pattern to shift and fade, and the color film to crack and fall off, seriously affecting the appearance and texture of the packaging, which does not meet the brand's packaging standards. molding process ensures smooth transportation throughout the process, no tension or friction pulling, and accurately maintains the integrity and clarity of printed patterns. The cloth bag surface is smooth, no color difference or deformation, the the finished product is beautiful and neat. Suitable for various brands of custom packaging, high-end agricultural by-product packaging, high-quality feed packaging production.
Thin-walled light PP weaving material is also suitable for non-tensile bag making equipment. Lightweight thin-walled woven materials has a light texture, high toughness and easy to stretch and deform. After processing, it is easy to appear uneven length, loose bag surface, edge curl and so on. Based on the panoramic feeding platform and a servo constant speed control system, the non-tensile flat bag maker can make thin-walled fabric form naturally, eliminate stretching deformation and size deviation, and solve the industry pain point of difficult and defective forming of lightweight woven bag. It is suitable for mass production of lightweight grain bags, powder packaging and small auxiliary material bag.
Weather-resistant modified PP weave and anti-aging weave can also be perfectly matched. This special modified material is commonly used for outdoor packaging bags and long distance export transportation. After special process optimization, it has the characteristics of anti-ultraviolet, anti-aging, anti-corrosion and so on. The structure of the material is so precise that when it is stretched, it loses some weather resistance. The tensionless process does not destroy the molecular structure and texture of the material. It completely preserves the advantages of anti-aging, high and low temperature resistance, and ensures the stability of finished packaging bags in complex environment.
It is important to note that while the non-elongated flat bag machine has a wide range of adaptability, its core is to form a fine quality woven material. For woven bags that do not require laminating, do not precision requirements, and use low-end recycled materials, conventional stretching equipment can meet production needs without the need for high-precision non-stretching equipment. Correct matching of materials and equipment can not only guarantee the quality of finished products, but also control production cost reasonably.
In conclusion, the non-elongated flat bag machine is mainly made of high precision and high protective material. The core is compatible with BOPP film woven materials, new high density pure material woven material, color printed composite material woven material, lightweight thin wall woven material, modified weatherproof woven material, etc. Covering feed, pet food, grain oil, industrial raw materials and other high-end packaging scene, textile packaging industry is the best equipment choice for high-quality material processing.
