Low melting point valve port bag and manufacturing method thereof

A production method and technology of valve pockets, which are applied in the field of packaging bags, can solve problems such as unstable quality, poor physical strength, and insufficient heat-sealing strength, and achieve the effects of non-toxic raw materials, stable melting points, and good compatibility

Active Publication Date: 2020-06-30
仲铂新材料有限公司
View PDF13 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 1. The production process is backward, the labor intensity is high, the output is low, and the quality is unstable
[0007] 2. The melting point of the valve bag with low melting point is not suitable. Since the temperature of the carbon black filling is 70-80°C, the valve bag will be thermally deformed after being filled with carbon black, and will be squeezed and deformed after stacking, resulting in collapse
[0008] 3. The physical strength is poor, and the

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
  • Low melting point valve port bag and manufacturing method thereof
  • Low melting point valve port bag and manufacturing method thereof
  • Low melting point valve port bag and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Example 1: See Figure 1~3 , a valve pocket with a low melting point, comprising a valve pocket body 1, the valve pocket body 1 is provided with a valve port 2, the valve port 2 includes an outer valve port 21 and an inner valve port 22, and the outer valve port 21 is arranged on the top right side of the valve bag body 1, and the inner valve port 22 is arranged at a position corresponding to the outer valve port 21 in the valve bag body 1, and the inner valve port 22 and the outer valve port 21 interconnected.

[0052] The carbon black material is poured into the valve pocket 1 through the valve port 2, and after the material is fully filled, the valve port 2 is folded toward the inner cavity of the valve body, and the carbon black material itself filled in the valve pocket 1 cavity is Self-sealing by gravity.

[0053]The cross section of the valve pocket body 1 can be in various shapes, such as circular, square or rectangular.

[0054] The overall length of the out...

Embodiment 2

[0087] Embodiment 2: The overall structure of the low melting point valve pocket in the present embodiment 2 is the same as that of Example 1, and the manufacturing method of the low melting point valve pocket specifically includes valve pocket body preparation and valve port preparation:

[0088] Wherein the valve pocket body preparation specifically comprises the following steps:

[0089] 1) Mixing: Take 87.5% ethylene-vinyl acetate copolymer and 12.5% ​​linear low-density polyethylene by weight as raw materials for the bag body, and put them into a mixer for full stirring and mixing.

[0090] The stirring and mixing time of the mixer in the step 1) is 35 minutes, and the mixing temperature is normal temperature.

[0091] The VA content of the ethylene-vinyl acetate copolymer in the step 1) is 12%.

[0092] The linear low density polyethylene in the step 1) is a metallocene linear low density polyethylene produced with a metallocene catalyst.

[0093] 2) Film blowing: Pour...

Embodiment 3

[0108]Embodiment 3: The overall structure of the low melting point valve pocket in the present embodiment 3 is the same as that of Example 1, and the manufacturing method of the low melting point valve pocket specifically includes valve pocket body preparation and valve port preparation:

[0109] Wherein the valve pocket body preparation specifically comprises the following steps:

[0110] 1) Mixing: Take 90% ethylene-vinyl acetate copolymer and 10% linear low-density polyethylene by weight as raw materials for the bag body, and put them into a mixer for sufficient mixing.

[0111] The stirring and mixing time of the mixer in the step 1) is 40 minutes, and the mixing temperature is normal temperature.

[0112] The VA content of the ethylene-vinyl acetate copolymer in the step 1) is 10%.

[0113] The linear low density polyethylene in the step 1) is a metallocene linear low density polyethylene produced with a metallocene catalyst.

[0114] 2) Film blowing: Pour the mixed mat...

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

PropertyMeasurementUnit
Diameteraaaaaaaaaa
Diameteraaaaaaaaaa
Diameteraaaaaaaaaa
Login to view more

Abstract

The invention discloses a manufacturing method for a low melting point valve port bag. The low melting point valve port bag has the following indexes that the melting point is between 98 and 102 DEG C; the transverse tensile strength is between 23 and 25 MPa; the longitudinal tensile strength is between 24 and 27 MPa; the transverse elongation at break is between 750 and 820 percent; the longitudinal elongation at break is 730 to 760 percent; the upper and lower heat seal strength is between 38 and 45 N/15mm; and the heat seal strength at four corners is between 38 to 45 N/15mm. The packagingbag prepared by the technical scheme can be thrown into an internal mixer together with carbon black, cannot produce package garbage in use, and is an environment-friendly product; embossing processing is performed when a film is blown so as to facilitate opening; the overall anti-sliding effect of a bag body is good; the melting point of the low melting point valve port bag is between 98 and 102DEG C, and is stable; thermal deformation cannot occur after the carbon black is injected; and the port bag is automatically filled into a cuboid after being filled with materials, so that bags are stacked tidily. A valve port is perforated for exhausting, is breathable and does not leak material; and the valve port bag has good compatibility with rubber and can be quickly fused into the rubber without affecting the performance of the rubber.

Description

technical field [0001] The invention relates to the technical field of packaging bags, in particular to a low melting point valve bag and a manufacturing method thereof. Background technique [0002] With the requirements of environmental protection, carbon black is the main raw material in the rubber industry. Carbon black packaging needs to be packed in valve bags. Valve bags are a kind of packaging bags. When packaging carbon black materials, they are fed from the top or bottom valve port. , After being filled with materials, it is in a square shape, which has the advantages of neat and beautiful stacking, high packaging efficiency, convenient transportation, and low damage rate. [0003] However, the types of existing valve bags include kraft paper valve bags, woven bags, PE valve bags, etc. After such valve bags are filled with carbon black materials, when they are transported to the closed rubber mixer for feeding, the valve bags cannot be separated from the material. ...

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
no application Login to view more
IPC IPC(8): B65D30/24C08L23/08C08J5/18B29C55/28B31B70/00B31B70/20B31B70/64B31B70/74B31B70/84
CPCB65D31/14C08J5/18B29C55/28B31B70/00B31B70/20B31B70/64B31B70/74B31B70/84C08J2323/08C08J2423/08
Inventor 周中华任世强张德刚
Owner 仲铂新材料有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap