CN1067206A - Method for making plastic bag used for packing welding rods - Google Patents
Method for making plastic bag used for packing welding rods Download PDFInfo
- Publication number
- CN1067206A CN1067206A CN 91107066 CN91107066A CN1067206A CN 1067206 A CN1067206 A CN 1067206A CN 91107066 CN91107066 CN 91107066 CN 91107066 A CN91107066 A CN 91107066A CN 1067206 A CN1067206 A CN 1067206A
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- plastic bag
- welding rods
- density polyethylene
- packing
- polyethylene resin
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Abstract
Method for making plastic bag used for packing welding rods of the present invention belongs to the plastic packing product field.The present invention mixes in the constant weight ratio high-density polyethylene resin and type low density polyethylene resin in mixing equipment after, drop into the extruder plasticizing of heating.By die head upper blowing method inflation moulding.Plastic film through blower cools, after batching, batching prints on marking machine again, then, routinely process on Bag Making Machine bag, seal, promptly make plastic bag used for packing welding rods finished product of the present invention.Only 0.04～0.05 millimeter of packaging bag thickness of the present invention, mechanical strength is good, and the pack breakage rate is low.
Description
The current packaging welding rod has these three kinds of soft PVC (PVC) plastic bag, low density polyethylene (LDPE) (LDPE) plastic bag and high density polyethylene (HDPE) (HDPE) plastic bags with plastic bag.
By the plastic bag used for packing welding rods that the polyvinylchloride calendered film is made, its density is at 1.16～1.35 gram/cm3s, and difficulty is fired, physical property is good, but its poor heat stability, is subjected to can cause different degradeds after the effect of light and heat, and sinter point is low, becomes fragile under the low temperature, after the time is long, the film embrittlement, this plastic bag used for packing welding rods thickness is thicker, up to 0.08～0.10 millimeter, therefore, the cost height, winter this plastic bag embrittlement that hardens, easy crack, the summer is deliquescing greatly then, the difficult encapsulation of welding rod; This plastic bag also has a kind of volatile flavor, and it is healthy to influence the workman, and the physical property of the polyvinyl chloride film bag of 0.1 millimeters thick is also relatively poor, and its mechanical strength data are as follows:
In length and breadth to pulling strengrth: 〉=14MPa
In length and breadth to breaking elongation: 〉=200%
Seal fastness: 〉=10.3 newton/1.5 centimetre
The plastic bag used for packing welding rods of making by low density polyethylene (LDPE) (LDPE) (being high pressure polyethylene).Its density is generally 0.910～0.925 gram/cm3.Though have good flexibility, extensibility, electrical insulating property and the transparency, mechanical strength is low, every moist, gas barrier properties is relatively poor, welding rod moisture-sensitive, Keeping life weak point, the thickness of its plastic bag used for packing welding rods must be at 0.08～0.10 millimeter, high like this thickness, manufacturing cost height.Under the film of 0.08～0.10 millimeter thickness, the data of its mechanical strength are as follows:
To pulling strengrth be in length and breadth: 10～12MPa
In length and breadth to breaking elongation: 550～650%
Brittle temperature :-80～-55 ℃
Seal fastness: 10.6 newton/1.5 centimetre
The plastic bag used for packing welding rods that high density polyethylene (HDPE) (HDPE) is made, because its puncture resistance is relatively poor, therefore, welding rod industry is not all adopted.
The objective of the invention is to reduce the thickness of packing welding rods plastic bag, can reduce its cost like this in order to adopt new polyethylene formula materials, and, its mechanical strength and physical property improved.
The present invention adopts high density polyethylene (HDPE) (HDPE) resin (being low pressure polyethylene) and type low density polyethylene resin (L-LDPE) mixed material to make a kind of method for making plastic bag used for packing welding rods, the weight ratio that it is characterized in that using high-density polyethylene resin is 65～75%, and the weight ratio of type low density polyethylene resin is 35～25%.Mix to drop into the extruder plasticizing of heating, by the moulding of die head usefulness upper blowing method inflation, through blower cools, batch, printing, bag, seal.
Technological process of the present invention is as follows:
After high-density polyethylene resin and type low density polyethylene resin mixed in mixing equipment by 65～75% to 35～25% part by weight, drop into the extruder plasticizing of heating, by die head upper blowing method inflation moulding, plastic film through blower cools, after batching, batching prints on marking machine again, then, making bag on the plastic bag machine, sealing, promptly make plastic bag used for packing welding rods finished product of the present invention by the calipers process.
The present invention is as follows with the advantage that high-density polyethylene resin and type low density polyethylene resin mix prepared plastic bag used for packing welding rods in proportion:
1, the thin thickness of plastic bag used for packing welding rods only needs 0.04～0.05mm.
2, good by its mechanical strength of the prepared plastic bag of above-mentioned technological process.
0.04 its pulling strengrth of plastic bag that～0.05mm is thick vertically is 37.03MPa, laterally is 32.58MPa; Breaking elongation (%) vertically is: 537.5, and laterally be 750; Sealing fastness is: 18.38 newton/1.5 centimetre.
3,5 kilograms of welding rods of this packing breakage rate≤2% of plastic bag, and the breakage rate of former polyvinylchloride packaging bag 〉=5%.
4, this packing welding rods plastic bag is cheap, only is polyvinylchloride, about 50～60% of low density polyethylene (LDPE) plastic bag used for packing welding rods.
5, in using packaging process, high temperature resistant 80 ℃ are not worn out, and low temperature resistant-70 ℃ still have flexibility, do not ftracture.
6, because anti-preferably steam permeability is arranged, make not moisture-sensitive of welding rod, prolonged the welding rod Keeping life.
The present invention is by the prepared packing welding rods plastic bag of above technology, in electric welding rod factory in Taizhou implements to use, welding rod per ton needs 200 of packaging bags, every sack only needs 0.09 yuan, packing per ton only take needs 18 yuan, and former every igelite packaging bag needs 0.21 yuan, packing per ton take needs 42 yuan, and 24 yuan of the packing charges of saving per ton are as if the electric welding rod factory in more than 20,000 ton of yearly output, then can save 500,000 yuans the whole year, therefore, the present invention's economic benefit still be social benefit all be very significant, the whole nation more than 100 tame welding rod factories, yearly output 50～600,000 ton can be country the whole year and save 1000～1,200 ten thousand Renminbi.
Claims (2)
1, a kind of method for making plastic bag used for packing welding rods of making by high-density polyethylene resin and type low density polyethylene resin mixed material, it is characterized in that using the weight ratio of high-density polyethylene resin 65～75%, the weight ratio of type low density polyethylene resin is 35～25%, mix to drop into extruder heat plasticizing, by the moulding of die head usefulness upper blowing method inflation, through blower cools, batch, printing, bag, seal.
2, above-mentioned method for making plastic bag used for packing welding rods according to claim 1 is characterized in that made plastic bag used for packing welding rods thickness is 0.04～0.05 millimeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91107066 CN1067206A (en) | 1991-05-30 | 1991-05-30 | Method for making plastic bag used for packing welding rods |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91107066 CN1067206A (en) | 1991-05-30 | 1991-05-30 | Method for making plastic bag used for packing welding rods |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1067206A true CN1067206A (en) | 1992-12-23 |
Family
ID=4908429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91107066 Pending CN1067206A (en) | 1991-05-30 | 1991-05-30 | Method for making plastic bag used for packing welding rods |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1067206A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8684179B2 (en) | 2007-12-31 | 2014-04-01 | Lincoln Global, Inc. | Insert having a reinforcement for container packaging |
-
1991
- 1991-05-30 CN CN 91107066 patent/CN1067206A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8684179B2 (en) | 2007-12-31 | 2014-04-01 | Lincoln Global, Inc. | Insert having a reinforcement for container packaging |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |