CN209802995U - Test paper strip - Google Patents

Abstract

The utility model belongs to the technical field of detect, a bottom plate back has test paper strip on adhesive layer is disclosed, furtherly, still adheres to the overburden that can peel off on the adhesive layer. The utility model discloses a test paper strip is through forming the adhesive layer at bottom plate back rubber coating, has replaced current test paper strip and need artifical double faced adhesive tape to carry out the traditional method fixed when using with carrier cooperation such as bayonet catch, pick-up plate, the utility model discloses a test paper strip convenient to use can improve detection efficiency to the adhesive layer that the bottom plate back set up can not influence the stability of test paper strip.

Description

a test strip

technical field

The utility model belongs to the technical field of detection and relates to a test paper strip, in particular to a test paper strip with an adhesive layer on the back of a bottom plate.

Background technique

Test strips are widely used in technical fields such as medicine and health, food safety, and environmental testing. The preparation process of test strips is usually as follows: the sample pad, marking pad, detection pad and water-absorbing pad are pasted on the base layer in a stepwise manner. bottom plate. The bottom plate is used to make the test paper strips into strips and play a certain supporting role. Usually the bottom plate used is a PVC board. The sample pad, marking pad, detection pad and water-absorbing pad are pasted on one side of the bottom (eg the back) can be used to contact the carrier holding the test strip.

Test strips often need to be used in conjunction with test boards, jams, and other carriers that accommodate the test strips to improve detection efficiency and play a role in carrying and protecting the test strips. At present, the fixation of test strips in carriers such as test boards and jams is usually by setting a protrusion or staple in the slot where the test strip is placed or set, so that the test strip is fixed in the slot, but for For some non-planar special-shaped carriers, due to technical problems, it is impossible to fix the test strips by setting protrusions or staples. The first method used is to wrap a circle of transparent glue on the top of the carrier to wrap the test strips. The upper end is fixed on the carrier. Although this method is feasible, the sealing between the carrier and the test strip is poor, and the flooding phenomenon is serious. Another method is to stick double-sided tape on the back of the test strip, that is, on the back of the bottom plate of the test strip, and then stick the test strip on the carrier. Although this method can make the test strip and the carrier fit closely, there are also the following Disadvantages: (1) The viscosity of the double-sided adhesive is low, which will easily cause the test strip to peel off and fall off from the carrier during use; (2) The color of the double-sided adhesive will turn yellow after a period of use; (3) The double-sided adhesive The colloidal substance in the test strip will affect the stability of the test strip. Pasting the double-sided adhesive on the test strip for a long time will reduce the signal strength of the marker, resulting in the failure of the detection line to be displayed and affecting the sensitivity of the detection; (4) in the use test It is necessary to manually cut and paste the double-sided tape, and the backing paper of the double-sided tape is difficult to peel off, which reduces the detection efficiency for large-scale detection work.

Contents of the invention

In order to solve the deficiencies in the prior art, the purpose of the utility model is to provide a test strip with stable performance in use.

Preferably, the back of the bottom plate of the test strip has an adhesive layer for fixing the test strip on the carrier for accommodating the test strip.

Preferably, the adhesive layer covers the entire area of the back of the bottom plate of the test strip.

Preferably, the adhesive layer only covers a limited area on the back of the bottom plate of the test strip.

Preferably, the back of the bottom plate of the test strip corresponding to the sample absorption area does not have an adhesive layer, and the remaining areas on the back of the bottom plate of the test strip have an adhesive layer.

Preferably, the upper and lower parts of the back of the test strip bottom plate have an adhesive layer, and the middle area of the back of the test strip bottom plate and the area corresponding to the sample absorption area do not have an adhesive layer.

As a preference, the area on the back of the bottom plate of the test strip corresponding to the sample absorption area without the adhesive layer is an area with a height of 1 cm from the bottom edge of the bottom plate.

Preferably, a peelable covering layer is attached to the adhesive layer, and the covering layer is flush with the bottom plate of the test strip.

Preferably, the covering layer is a backing paper or a plastic film.

Preferably, the covering layer has an easy tear piece.

Preferably, the easy-to-tear block is formed by a covering layer that is flush with the top edge of the bottom plate and extends outward for a certain distance.

Preferably, the distance between the vertex of the easy-to-tear block and the top edge of the bottom plate is 0.3-1.0 cm.

Preferably, the shape of the easy-to-tear block is any one of rectangle, square, triangle, circle and ellipse.

Beneficial effect:

The test strip of the utility model replaces the traditional method that the existing test strip needs to be manually pasted with double-sided adhesive for fixing when it is used in conjunction with carriers such as jamming and detection boards, by setting an adhesive layer on the back of the bottom plate. The test strip is easy to use and can improve detection efficiency, and the adhesive layer provided on the back of the bottom plate will not affect the stability of the test strip, and the test strip and the carrier have good sealing performance.

Description of drawings

Figure 1 is a schematic diagram of the structure of a test strip.

Fig. 2 is a schematic view of the back of the bottom plate of the test strip according to an embodiment of the present invention.

Fig. 3 is a schematic view of the back of the test strip bottom plate in the second embodiment of the present invention.

Fig. 4 is a schematic diagram of the back of the test strip bottom plate in the third embodiment of the present invention.

Reference numerals: 100 base plate, 101 sample pad, 102 marker pad, 103 detection pad, 104 water absorption pad, 105 corresponding to the area without adhesive layer in the sample absorption area, 106 area without adhesive layer in the middle of the base plate, 107 top edge of the base plate , 108 base plate bottom edge, 200 adhesive layer, 300 covering layer, 301 easy to tear block.

Detailed ways

The structure involved in the utility model or the technical terms used will be further described below, and the utility model will be further explained in conjunction with the accompanying drawings. These descriptions are only used as examples to illustrate how the method of the present utility model is realized, and cannot constitute any limitation to the present utility model.

test strip

The test strips applied to the present utility model can be so-called lateral flow test strips (Lateralflow test strips), and the specific structure and detection principle of these test strips are well known to those skilled in the art in the prior art , as disclosed in US6156271, US5504013, EP728309 and the like. The test strip may comprise a plurality of regions, such as a sample absorbing area including a sample pad, a marking area including a marking pad, a marking area including an absorbent pad, a marking area having an object to be marked Labeled reagents, such as gold pads containing colloidal gold-labeled antibodies, the detection area on the detection pad contains the necessary chemicals for detecting the presence or absence of the analyte, such as immunological reagents or enzyme chemical reagents. Of course, a control area may also be included downstream of the detection area. Usually, the control area and the test area appear in the form of horizontal lines, which are detection lines or control lines. Generally, there are dry chemical reagent components on the test strips, such as immobilized antibodies or other reagents. When encountering a liquid sample, the liquid flows along the test strip with capillary action, and the dry reagent components dissolve in the test strip. The liquid, so as to go to the next area to react with the dry reagent in that area, so as to carry out the necessary detection. The commonly used detection test strips are nitrocellulose membrane test strips, which include nitrocellulose membrane in the detection area, and specific binding substances are immobilized on the nitrocellulose membrane to display the detection results. It can also be cellulose acetate membrane or nylon film etc.

As shown in FIG. 1 , the existing test strip consists of a bottom plate 100 , a sample pad 101 , a marking pad 102 , a detection pad 103 and an absorbent pad 104 . When the test strip is made, first place the detection pad 103 on the base plate 100, then place the marking pad 102 above one end of the detection pad, place the absorbent pad 104 at the other end, then place the sample pad 101 above the marking pad 102, each part overlapped with adhesive. Or, the top of the sample pad 101 of an existing test strip will be covered with a self-adhesive layer, which is used to protect the sample pad 101 and the marking pad 102 below it, and is used to indicate related logo. Wherein, the width of the test strip is generally between 3-6 mm, and the length is generally between 6-10 cm. Existing test strips often need to be used together with carriers such as test boards and jams. Carriers such as test boards and jams play a certain role in carrying and protecting the test strips, and can detect different analytes at one time. Usually, it is fixed on the carrier by manually sticking double-sided adhesive on the back of the bottom plate of the test strip, which is very inconvenient to use, which reduces the detection efficiency, and the colloidal substance of the double-sided adhesive used will affect the test strip. Stability can be affected, especially on the nitrocellulose membrane of the test strip, causing the test line not to be displayed, or causing a decrease in marker signal.

Therefore, the utility model provides an improved test strip that can be used conveniently and has stable performance. In some embodiments, a sticky adhesive layer 200 is formed by applying glue on the back of the bottom plate 100 of the test strip, so that the test strip can be directly pasted on the carrier without additional double-sided tape. The adhesive used in the adhesive layer 200 is a commonly used adhesive for preparing test strips in the field, and will not negatively affect the stability of the test strips such as marker signals and nitrocellulose membrane.

In some embodiments, the adhesive layer 200 covers the entire area of the back of the bottom plate 100 of the test strip, that is, the back of the bottom plate 100 of the test strip is all coated with glue to form the adhesive layer 200 (as shown in FIG. 2 ).

In some embodiments, the adhesive layer 200 only covers a limited area on the back of the test strip bottom plate 100 , that is, some areas on the back of the test strip bottom plate 100 are coated with the adhesive layer 200 and some areas are not coated with glue.

In some embodiments, the back of the bottom plate of the test strip corresponding to the sample absorption area does not have an adhesive layer 200, and the remaining area of the back of the test strip bottom plate has an adhesive layer 200, that is, the back of the bottom plate 100 is close to the bottom edge 108 of the bottom plate. Areas are not glued, while other areas are glued (as shown in Figure 3). In this embodiment, the area near the bottom edge 108 of the bottom plate is the area where the sample absorption area is located, that is, the sample pad constituting the test strip is pasted on the front of the bottom plate 100 corresponding to this area. Insert the sample or the sample cavity of the detection device to contact the sample. The sample absorption area of the test strip is in contact with the sample to form a liquid flow state. The purpose of leaving the back of the bottom plate corresponding to the sample absorption area blank without glue is to avoid the test strip When inserted into a liquid sample, the adhesive on the back of the base plate is in contact with the sample, because if the adhesive dissolves in the sample, it may have some effect on the test results. In some embodiments, the area on the back of the test strip bottom plate 100 corresponding to the sample absorption area without the adhesive layer 200 is the area at a height of 1 cm from the bottom edge of the bottom plate, that is, the area indicated by reference numeral 105 .

In some preferred embodiments, the upper and lower parts of the test strip bottom plate 100 back have an adhesive layer, and the middle area on the back of the test strip bottom plate and the area corresponding to the sample absorption area do not have an adhesive layer (as shown in Figure 4 The areas indicated by reference numerals 106 and 105). Wherein, the area without the adhesive layer corresponding to the sample absorption area on the back of the bottom plate of the test strip is the area with a height of 1 cm from the bottom edge of the bottom plate. Cost savings can be achieved by leaving some areas on the back of the strip base free of glue without causing glue spillage.

In some preferred embodiments, a peelable cover layer 300 is attached to the adhesive layer 200, and the cover layer 300 is flush with the test strip bottom plate 100, that is, the area of the cover layer 300 is equal to that of the test strip. For the area of the base plate 100 , the covering layer 300 covers the entire base plate 100 . The function of the cover layer 300 is to protect the adhesive layer 200 to prevent the test strips from sticking together when not in use, and only need to simply peel off the cover layer 300 on the back of the bottom plate when in use. In some embodiments, the covering layer 300 may be a backing paper, a plastic film with a certain hardness, a plastic sheet, and the like.

In some preferred embodiments, the covering layer 300 has an easy-to-tear block 301 . The cover layer 300 can be peeled off from the adhesive layer 200 quickly and conveniently through the easy-tear block 301 . In some preferred embodiments, the easy-to-tear block 301 is formed by a covering layer 300 that is flush with the top edge 107 of the bottom plate and extends outward for a certain distance, that is, the left and right sides and the bottom edge of the covering layer 300 are in contact with the left and right sides of the bottom plate 100. The side and bottom edges are flush, and the top edge of the cover layer 300 extends a certain distance outside the test strip, forming a protrusion that leaks out of the test strip. In some preferred embodiments, the distance from the top edge of the cover layer 300 to the outside of the test strip is 0.3-1.0 cm, that is, the distance from the top edge of the easy-to-tear block 301 to the top edge 107 of the bottom plate is 0.3-1.0 cm. 1.0cm. In some preferred embodiments, the shape of the easy-to-tear block 301 is any one of rectangle, square, triangle, circle and ellipse. In some preferred embodiments, the top edge of the covering layer 300 extends 0.3-1.0 cm outward from the test strip to form a rectangular easy-to-tear block 301 that leaks outside the test strip.

Bottom plate

The material of the test strip bottom plate 100 applied to the utility model is a commonly used material in this field, such as a PVC board, the color of the bottom plate is not limited, it can be white or black, and when the color of the bottom plate 100 is black, it can be used Used in the production of special test strips for fluorescence. When the test strip is made, glue is first applied on the back of the base plate 100 to form a base plate with an adhesive layer 200 and a peelable cover layer 300 attached, and then the detection pad 103, marking pad 102, water-absorbing pad, The sample pad 101 and the like are prepared as test strips described in the utility model.

Holder for test strips

The carrier for containing the test strips in the utility model is mainly used to carry the test strips, and play a certain protective effect on the test strips, such as jamming, detection boards, detection cups, etc. with grooves for placing test strips Detection barrels, etc. Usually, the test strips are placed in a carrier such as a card plug or a detection plate to realize simultaneous detection of multiple analytes; the above-mentioned carriers can also be used in conjunction with common detection devices in the field to achieve sample collection, detection, and results Integration and automation of reading.

Example 1

The utility model provides a test strip. As shown in FIG. 3 , there is an adhesive layer 200 for fixing the test strip on a carrier for accommodating the test strip on the back of the bottom plate 100 of the test strip. A peelable cover layer 300 is attached, wherein the material of the cover layer 300 is a backing paper. There is no adhesive layer 200 on the back of the bottom plate corresponding to the sample absorption area of the test strip, and the remaining areas have an adhesive layer 200. The area 105 without the adhesive layer corresponding to the sample absorption area on the back of the test strip bottom plate is a distance from the bottom edge of the bottom plate. 1cm area. There is an easy-to-tear block 301 on the cover layer 300, and the easy-tear block 301 is formed by extending 0.5 cm outward from the cover layer 300 covering the bottom of the bottom plate, that is, the distance between the apex of the easy-tear block 301 and the top edge 107 of the bottom plate is 0.5 cm. cm. The shape of the easy tear block 301 is a rectangle.

When the test strip of the present utility model is used, the cover layer 300 is peeled off from the test strip bottom plate 100 by the easy-to-tear block 301, the adhesive layer 200 is leaked out, the test strip is pasted on the carrier, and then the sample absorption area of the test strip is Insert the liquid sample to detect.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (10)

1. A test strip, characterized in that the back of the base plate of the test strip has an adhesive layer for fixing the test strip on the carrier that accommodates the test strip. 2. The test strip according to claim 1, wherein the adhesive layer covers the entire area of the back of the test strip bottom plate. 3. The test strip according to claim 1, wherein the adhesive layer only covers a limited area on the back of the bottom plate of the test strip. 4. The test strip according to claim 3, characterized in that the back of the bottom plate corresponding to the sample absorption area of the test strip does not have an adhesive layer, and the remaining areas on the back of the test strip bottom plate have an adhesive layer. 5. test strip according to claim 3, is characterized in that, the top and the bottom of described test strip bottom plate backside have adhesive layer, and the middle area of described test strip bottom plate backside and the zone of corresponding sample absorption zone are not With adhesive layer. 6. The test strip according to claim 4 or 5, characterized in that, the area without the adhesive layer corresponding to the sample absorption area on the back of the test strip bottom plate is the area with a height of 1 cm from the bottom edge of the bottom plate. 7 . The test strip according to claim 1 , wherein a peelable covering layer is attached to the adhesive layer, and the covering layer is flush with the bottom plate of the test strip. 8. The test strip according to claim 7, characterized in that, the covering layer has an easy-to-tear block. 9 . The test strip according to claim 8 , wherein the easy-to-tear block is formed by a covering layer that is flush with the top edge of the bottom plate and extends outward for a certain distance. 10. The test strip according to claim 9, wherein the distance between the apex of the easy-tear block and the top edge of the bottom plate is 0.3-1.0 cm.