Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A packaging bag and film layer technology, which is applied in the field of packaging supplies, can solve problems such as difficulty, high manufacturing cost, and impracticality, and achieve the effect of scientific materials, scientific selection, and ideal effects
Inactive Publication Date: 2003-07-16
谢星倩
View PDF8 Cites 21 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
Although this method can produce micro pores, the manufacturing cost is too high and difficult, and there is still an explosion phenomenon in the heating process. Most of the inorganic salt additives added in it belong to a kind of low specific heat and high Materials with a dielectric constant are easier to travel to local hot spots in a heated environment, and because of the problem of melting through packaging materials, it is not practical
In addition, this method will lead to inconsistent quality of the breathable film, such as stretching ratio, processing temperature, film thickness and raw material formula, etc. will lead to inconsistent hole sizes, and the use of additives will have different effects on the subsequent environment, which may cause environmental problems
Furthermore, the multiphase combination (multiplephases) of additives often makes the film not possess transparency after film formation.
Also, when this material is used in food packaging, the additives in the material may contaminate the packaged food and cause unpleasant odours.
When this type of gas-permeable film comes into contact with food containing oil or alcohol, it cannot effectively block the oil and alcohol, and will cause the oxygen scavenger components in the food packaging to be contaminated by the oil or alcohol, and cannot achieve the function of keeping the food fresh
Method used
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
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0037] refer to Figure 1A As shown, the present invention provides a film layer structure 100 which is a layer of heat-sealable material capable of heat melting, and the film layer 10 shown in it is selected from acrylic, polyester, polyethylene, PE), polypropylene (polypropylene, PP), polythiamine (polyamide, nylon), polyethylene and polypropylene copolymer, ethylene and styrene copolymer (ethylene-styrenecopolymer, ES), cyclic olefin copolymer Polymer (cyclo olefin), polyethylene terephthalate (polyethylene terephthalate, PET), polyvinyl alcohol (polyvinyl alcohol, PVA), ethylene-vinylacetate (EVA), or made of (SurlynTm (Dupontionomer Ionic polymer compound trade name), polyethylene glycol terephthalate (polyethylene naphthalate, PEN), polyether ketone (poly ether ketone, PEEK), polycarbonate (polycarbonate, PC), polysulfone (polysulfone ), polyimide (PI), polyacrylonitrile (PAN), styrene and acrylonitrile copolymer (styrene acrylonitrile, SAN), polyurethane (polyurethane, ...
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
Login to view more
PUM
Property
Measurement
Unit
size
aaaaa
aaaaa
Login to view more
Abstract
A packing bag for food is composed of a first film layer with several slits generated by calendering and a second film layer to interlock with several lateral edges of the first film layer. Its preparing process includes such steps as preparing high-molecular films, calendering, coating, hot pressing for enclosing edges, and cutting for removing excessive edges. It features that the food contained in it can be easily heated by microwave oven, high-temp. steam, boiling or infrared ray.
Description
1. Technical field: [0001] The invention relates to packaging supplies, in particular to a packaging bag and a manufacturing method thereof. 2. Background technology: [0002] At present, the more common packaging items used in microwave ovens on the market include plastic wrap (wrapfilm), special bags for microwave ovens, and dishes. The raw materials used in these packaging items are polyethylene (PE), polypropylene (PP), polythiamine (polyamide, nylon), polycarbonate (PC), polyvinyl chloride (PVC), polyvinylidene chloride (PVDC) , polymethylpentene (PMP), ethylene-vinyl acetate (ethylene-vinyl acetate, EVA), polyurethane (polyurethane, PU) or SurlynTM (trade name of Dupont ionomer ion polymer compound), polyethylene terephthalate Ester (polyethylene terephthalate, PET), polyvinyl alcohol (polyvinyl alcohol, PVA), paper, synthetic paper, cellophane, wax paper, ceramic, glass and other materials or a combination of the above materials, the structure of the packaging items ...
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
Login to view more
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more