Preparation technology of PET/PETG shrink film

A preparation process and shrink film technology, which is applied to flat products, other household appliances, household appliances, etc., can solve the problems of low mechanical strength, high raw material consumption, low production efficiency, etc., and achieve good mechanical properties, high transparency, The effect of high production efficiency
CN101934592AInactive Publication Date: 2011-01-05JIANGSU SHUANGXING COLOR PLASTIC NEW MATERIALS
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
JIANGSU SHUANGXING COLOR PLASTIC NEW MATERIALS
Publication Date
2011-01-05
Estimated Expiration
Not applicable · inactive patent
Patent Text Reader

Abstract

The invention discloses a preparation technology of a PET / PETG shrink film, comprising: 1. drying treatment: drying copolyester slices at the temperature of 65-75 DEG C; 2. melt extrusion: mixing the dried copolyester with functional master batch / functional accessory ingredient, and adding into a single screw extruder to carry out melt extrusion; 3. die head / casting strip quenching: after a melt extruded fusant enters a hanger-type die head by a fusant metering pump, a filter and a fusant pipeline, casting to a cooler drum via a die lip mouth to form the casting strip; 4. unilateral stretching: stretching the casting strip processed in the last step; and 5. rolling and slitting: measuring the thickness of the unilateral stretched film on line, dragging, and rolling; and finally, slitting, checking and packaging to obtain the film product. The product produced by the method has high transparency, good mechanical behavior, high output, high cooling speed and high production efficiency, and the tolerance of the thickness thereof is smaller than that of a blown film.
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Description

technical field

[0001] The invention relates to a preparation process of PET / PETG shrink film. Background technique

[0002] In recent years, heat shrinkable packaging films have developed rapidly, and are expanding from a single PVC shrink film to PETG, PE, PP, PVDC and other varieties of films. The market demand is constantly changing, and heat shrinkable films are moving towards multi-layer and functional directions. With the development, many new technologies and new products have appeared. In addition to being widely used in fast food pasta, ceramic products, tea sets, and mechanical parts, the combination of heat shrinkable film and vapor phase antirust technology in the application of military machinery and hardware tools , instead of the method of pouring anti-rust oil, has been widely used.

[0003] At present, there are two general methods of film forming: calendering and tape casting: ①The calendering method uses various mixing machines (such as high-speed mixers...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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